CN118181142A - Honing fixture for connecting rod - Google Patents

Abstract

The invention provides a honing fixture for a connecting rod. The honing fixture includes: a top portion having a first surface; a bottom portion spaced apart from the top portion, the bottom portion having a second surface facing the first surface; and at least one separation assembly arranged between the first surface and the second surface, wherein any separation assembly comprises a bearing tray and a floating tray which is in sliding connection with the bearing tray, the bearing tray is fixedly connected with the top, the floating tray is provided with a first separation surface and a second separation surface, the second separation surface is positioned between the first separation surface and the second surface, the distance between the first surface and the first separation surface adjacent to the first surface is reduced to clamp a connecting rod in the process of switching the honing fixture from an initial state to a clamping state, and the distance between the second surface and the second separation surface adjacent to the second surface is reduced to clamp another connecting rod. The technical scheme aims at solving the problem that the honing effect of the inner hole of the connecting rod is easily affected by tolerance accumulation in the prior art.

Description

Honing fixture for connecting rod

Technical Field

The invention relates to the field of honing equipment, and particularly provides a honing fixture for a connecting rod.

Background

The connecting rod is one of the main transmission components of the automobile engine. The connecting rod is used for connecting the piston and the crankshaft, transmitting the acting force exerted by the piston to the crankshaft, and converting the reciprocating motion of the piston into the rotary motion of the crankshaft so as to output power. Fig. 1 is a schematic structural view of a connecting rod. As shown in fig. 1, the connecting rod 600 includes a shaft 61, a large head 62 provided at one end of the shaft 61, and a small head 63 provided at the other end of the shaft 61. Wherein, the big end 62 and the small end 63 are provided with inner holes 64. The inner hole 64 of the big end 62 is matched with the outer wall surface of the crankshaft, the inner hole 64 of the small end 63 is matched with the piston pin, the machining precision requirement is high, and the working procedures such as rough grinding, fine grinding, honing and the like are carried out in sequence.

Honing is a method of finishing a hole by using a honing head with a bar (whetstone). In honing, the workpiece is fixed, the honing head is driven by a main shaft of a machine tool to rotate and make reciprocating rectilinear motion, meanwhile, a grinding bar acts on the surface of the workpiece under a certain pressure, a layer of extremely thin material is cut from the surface of the workpiece, and a cutting track left on a hole wall is usually a crossed reticulate pattern.

In the prior art, a method of processing a plurality of workpieces at one time is generally adopted for honing the inner hole of the connecting rod. For example, japanese patent application JP2003326451a discloses a honing jig. This patent discloses a method of stacking a plurality of link work pieces in sequence from bottom to top and performing one-time processing on all the stacked inner bores. However, the outer surface of the connecting rod tends to be machined only slightly with low precision after forging is completed. During stacking of the connecting rods, for adjacent upper and lower connecting rods, they are held stable by the two bore end faces 641 of the bores abutting each other. Because of the unstable perpendicularity tolerance between the bore end face 641 and the bore center line, this stacking approach is extremely prone to tolerance stack up, resulting in tilting of the upper work piece, and thus affecting honing.

Accordingly, there is a need in the art for a new solution to the above-mentioned problems.

Disclosure of Invention

The invention provides a honing fixture for a connecting rod, which aims to solve the problem that the honing effect of an inner hole of the connecting rod is easily influenced by tolerance accumulation in the prior art. The honing fixture of the invention comprises: a top portion having a first surface; a bottom portion spaced apart from the top portion, the bottom portion having a second surface facing the first surface; and at least one separation assembly arranged between the first surface and the second surface, wherein any separation assembly comprises a bearing tray and a floating tray which is in sliding connection with the bearing tray, the bearing tray is fixedly connected with the top, the floating tray is provided with a first separation surface and a second separation surface, the second separation surface is positioned between the first separation surface and the second surface, the distance between the first surface and the first separation surface adjacent to the first surface is reduced to clamp a connecting rod in the process of switching the honing fixture from an initial state to a clamping state, and the distance between the second surface and the second separation surface adjacent to the second surface is reduced to clamp another connecting rod.

The invention adopts the separation component arranged between the top and the bottom to separate the connecting rods stacked in the prior art, so that each connecting rod can be correspondingly arranged at the proper positions on both sides of the separation component. The first surface, the first separation surface, the second separation surface and the second surface are parallel to each other, and the inner hole end surfaces of the connecting rods are not directly abutted against each other and take a common parallel plane as a reference, so that errors of the inner hole end surfaces of the connecting rods can not be accumulated, the honing condition of the inner holes is greatly improved, and the inner holes of each connecting rod arranged on the honing fixture can be effectively processed by honing equipment. Through the arrangement of the bearing tray and the floating disc, the floating disc which is directly contacted with the connecting rod is replaced under the condition that the bearing tray is kept unchanged, so that the honing fixture disclosed by the invention is suitable for connecting rods with different sizes, and the corresponding fixture is not required to be equipped for connecting rods with each specification, thereby reducing the use cost. The bearing tray is fixedly connected with the top, the floating tray and the bearing tray are in sliding connection, so that the connecting rod has enough installation space, and simultaneously, the distance between the top and the bottom can be reduced by adjusting the top and the bearing tray which synchronously move, so as to clamp the connecting rod.

In the preferred embodiment of the honing jig for a connecting rod described above, the partitioning members are plural and spaced apart from each other, and the distance between the first partitioning surface of one partitioning member and the second partitioning surface of the other partitioning member adjacent thereto is reduced to clamp the connecting rod in the process of switching the honing jig from the initial state to the clamped state. Through the arrangement, the number of the connecting rods clamped by the honing fixture at one time is increased.

In the preferred embodiment of the honing fixture for connecting rod, a guide hole is provided on any of the holding trays, the floating tray has a guide portion that is matched with the guide hole, and at least a part of the guide portion is always accommodated in the guide hole during the process of switching the honing fixture from the initial state to the clamped state. By the arrangement described above, the guide holes always keep the first and second partition surfaces on the floating disc parallel to the first and second surfaces.

In the preferred solution of the honing fixture for connecting rods described above, the floating disc further comprises a limit flange, the movement of the floating disc towards the bottom with respect to the carrier tray being limited by the limit flange. Through the setting of limit flange, when not setting up the connecting rod, the floating disc also can set up on holding the tray steadily to promote the simple operation nature of honing anchor clamps.

In the preferred embodiment of the honing fixture for a connecting rod described above, a mounting groove recessed toward the inside of the backup plate is formed on the inner wall of the guide hole, the mounting groove having an opening formed on the surface of the backup plate, and the limit flange is receivable in the mounting groove. Through the arrangement, the first separation surface can be configured to be flush with or lower than the surface of the tray, so that the blocking of the connecting rod in the process of being placed on the first separation surface is reduced, and the installation efficiency of the connecting rod on the honing fixture is improved.

In the preferred embodiment of the honing fixture for connecting rods described above, the side of the support plate facing the bottom is formed with an inwardly recessed relief groove adapted to receive the shaft of the connecting rod in the clamped state. Through the arrangement, after the floating disc slides towards the top, the surface of the supporting disc towards the bottom is prevented from being interfered with the connecting rod body to be damaged.

In the above preferred technical solution of the honing fixture for a connecting rod, positioning blocks are provided on the first partition surface and the second surface, and the positioning blocks are adapted to abut against the outer surface of the connecting rod. Through the arrangement, when the connecting rod is just placed on the second surface and the first separation surface, the connecting rod can be roughly positioned through the positioning block, and the follow-up fine positioning is facilitated.

In the preferred technical scheme of the honing fixture for connecting rod, positioning holes are formed on any floating disc and the top; the honing fixture also includes a locating shaft configured to extend through each locating hole and the bore of each link after the links are disposed on the first and second faces.

In the preferred technical solution of the honing jig for a connecting rod described above, the positioning shaft is fitted into the positioning hole and the inner bore before the connecting rod is clamped, and the positioning shaft is moved out of the positioning hole and the inner bore after the connecting rod is clamped. Through the configuration, the positioning shaft achieves fine positioning of the connecting rods, so that the central lines of the inner holes of different connecting rods are approximately aligned, and the honing equipment can process a plurality of inner holes at one time.

In the above preferred technical solution of the honing fixture for connecting rod, the honing fixture further includes a driving device that can drive the honing fixture to switch between an initial state and a clamped state; the driving device comprises a movable end and a fixed end, the movable end is fixedly connected with the top or any bearing plate, and the fixed end is fixedly connected with the bottom. Through the arrangement of the driving device, the honing fixture can realize automatic clamping after being installed in place continuously, and improves the clamping efficiency.

Drawings

Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural view of a connecting rod;

Figure 2 is a schematic structural view of an embodiment of the honing fixture for connecting rods of the invention;

figure 3 is a side view of an embodiment of the divider assembly of the honing fixture for connecting rods of the invention;

Figure 4 is a schematic bottom angle view of an embodiment of the divider assembly of the honing fixture for connecting rods of the invention;

figure 5 is a cross-sectional view at A-A of an embodiment of a divider assembly of the honing fixture for connecting rods shown in figure 3;

figure 6 is an elevation view of an embodiment of the honing fixture for connecting rods of the invention in an initial state;

figure 7 is an elevation view of an embodiment of the honing fixture for connecting rods of the invention in a clamped state;

figure 8 is a partial top view of an embodiment of the honing fixture for a connecting rod of the invention when the connecting rod is abutted against a locating block.

List of reference numerals:

100. Honing the fixture; 10. a top; 11. a first surface; 12. a connecting column; 20. a bottom; 21. a second surface; 30. a partition assembly; 31. a first separation surface; 32. a second partition surface; 33. a tray; 331. a guide hole; 3311. a mounting groove; 332. a tray surface; 333. an avoidance groove; 34. a floating disc; 341. a limit flange; 342. a guide part; 41. a positioning block; 42. positioning a shaft; 43. positioning holes; 50. a driving device; 51. a moving end; 52. a fixed end; 600. a connecting rod; 61. a shaft; 62. a large head; 63. a small end; 64. an inner bore; 641. an end face of the inner hole.

Detailed Description

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "disposed," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be directly connected, can be indirectly connected through an intermediate medium, and can also be communicated with the inside of two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

The invention provides a honing fixture for a connecting rod, which aims to solve the problem that the honing effect of an inner hole of the connecting rod is easily influenced by tolerance accumulation in the prior art. The honing jig 100 of the invention includes: a top 10, the top 10 having a first surface 11; a bottom 20, the bottom 20 being spaced apart from the top 10, the bottom 20 having a second surface 21 facing the first surface 11; and at least one partition member 30, the partition member 30 being disposed between the first surface 11 and the second surface 21, any one of the partition members 30 including a socket 33 and a floating plate 34 slidably coupled to the socket 33, the socket 33 being fixedly coupled to the top 10, the floating plate 34 having a first partition surface 31 and a second partition surface 32, the second partition surface 32 being disposed between the first partition surface 31 and the second surface 21, a distance between the first surface 11 and the first partition surface 31 adjacent thereto being reduced to clamp the link 600 and a distance between the second surface 21 and the second partition surface 32 adjacent thereto being reduced to clamp the other link 600 during the switching of the honing jig 100 from the initial state to the clamped state.

Figure 2 is a schematic structural view of an embodiment of the honing fixture for connecting rods of the invention. As shown in fig. 2, the honing fixture 100 for a connecting rod of the present invention includes a top 10, a bottom 20 and a partition assembly 30 provided between the top 10 and the bottom 20.

In one or more embodiments, the "up, down" direction is configured as a vertical direction based on the orientation shown in FIG. 2. The bottom 20 is disposed below the top 10. The top 10 has a first surface 11 facing "downwards" and the bottom 20 has a second surface 21 facing the first surface 11 (i.e. facing "upwards"), the first surface 11 and the second surface 21 being parallel to each other. Alternatively, the "up and down" direction may be set to other suitable directions (e.g., horizontal) so as to orient the centerline of the bore 64 in the actual desired direction after clamping the connecting rod 600. In one or more embodiments, both the bottom 20 and the top 10 are configured as plate-like members to facilitate controlling the first surface 11 and the second surface 21 to be parallel to each other. Alternatively, the top 10 and bottom 20 may be configured in other suitable shapes as desired.

With continued reference to fig. 2, honing fixture 100 of this embodiment includes 4 divider assemblies 30. Each of the partition assemblies 30 includes first and second opposed partition surfaces 31 and 32, the first and second partition surfaces 31 and 32 directly abutting the bore end surfaces to clamp the connecting rod. With the first partition surface 31 facing the top 10 (i.e., facing "up") and the second partition surface 32 facing the bottom 20 (i.e., facing "down") and both the first partition surface 31 and the second partition surface 32 being parallel to the second surface 21. Alternatively, the separation assembly 30 may be provided in other suitable numbers, such as 1,2, 5, etc., greater than 4 or less than 4.

Figure 3 is a side view of an embodiment of the divider assembly of the honing fixture for connecting rods of the invention; figure 4 is a schematic bottom angle view of an embodiment of the divider assembly of the honing fixture for connecting rods of the invention; figure 5 is a cross-sectional view at A-A of an embodiment of a divider assembly of the honing fixture for connecting rods shown in figure 3. As shown in fig. 3, 4 and 5, in one or more embodiments, each of the partition assemblies 30 includes a support tray 33 and a floating tray 34 slidably coupled to the support tray 33. Each of the carrier trays 33 is configured as a substantially annular member. A guide hole 331 is formed at the center of the support plate 33, and the guide hole 331 penetrates the support plate 33 where it is located. The centerlines of each of the pilot holes 331 coincide and are all perpendicular to the first surface 11 to facilitate movement of the floating disc 34 in the direction of the centerlines. Alternatively, the tray 33 may be configured in other suitable shapes, such as a square plate or the like. Alternatively, the center line of the guide hole 331 may be configured to extend in other directions. In one or more embodiments, the tray 33 has a tray surface 332 that faces the top 10. The guide hole 331 has an inner wall formed with a mounting groove 3311 recessed toward the inside of the tray 33. The mounting groove 3311 has an opening formed in the tray surface 332 so that the floating tray 34 moves toward the top 10. Alternatively, the arrangement of the mounting groove 3311 may be omitted.

In one or more embodiments, a plurality of connecting posts 12 are provided on the first surface 11. Each of the trays 33 is secured to the connecting post 12 such that each of the trays 33 is fixedly connected to the top 10 to thereby drive the top 10 and the divider assembly 30 in a synchronized motion. Alternatively, the tray 33 and the top 10 may be secured together by other structures. Alternatively, the top 10 and each of the separation assemblies 30 may be configured as relatively independent components, enabling different actions.

With continued reference to fig. 4, in one or more embodiments, an inwardly recessed relief groove 333 is formed on a side of the tray 33 facing the bottom 20. When the connecting rod 600 moves towards the top 10 under the action of the clamping force, the rod body 61 of the connecting rod 600 may interfere with the fixed bearing plate 33, and the rod body 61 is accommodated in the avoiding groove 333 through the arrangement of the avoiding groove 333, so that the rod body 61 is prevented from being damaged due to collision with the bearing plate 33. Alternatively, the provision of the escape groove 333 may be omitted if the shaft 61 and the tray 33 are not at risk of collision.

With continued reference to fig. 3, 4 and 5, in one or more embodiments, the first and second separation surfaces 31 and 32 are formed on either side of the floating disc 34, i.e., the floating disc 34 is in direct contact with the bore end surface 641, and the backup disc 33 functions primarily to clamp the connecting rod 600 in cooperation with the floating disc 34. In one or more embodiments, floating disc 34 includes a guide 342. The guide 342 has a shape corresponding to the guide hole 331, and at least a portion of the guide 342 is always accommodated in the guide hole 331 during the switching of the honing jig 100 from the initial state to the clamping state so as to be moved toward the top 10 along the extending direction of the guide hole 331 to clamp the link 600. In one or more embodiments, floating disc 34 includes a stop flange 341. The stopper flange 341 surrounds the outside of the floating disc 34 and protrudes outward from the circumferential wall of the floating disc 34. The limit flange 341 may be received in the mounting groove 3311 formed on the guide hole 331 so that the first separation surface 31 may be flush with the tray surface 332 or so that the first separation surface 31 is lower than the tray surface 332, so that the link 600 may be pushed onto the first separation surface 31 from the tray surface 332, improving the clamping efficiency of the honing jig 100. Alternatively, in an embodiment in which the mounting groove 3311 is not provided, the limit flange 341 may also be abutted against the tray surface 332. It should be noted that the floating disc 34 and the supporting disc 33 slide through the cooperation of the guide holes 331 and the guide portions 342, on the basis of which, only in the case of ensuring that the shape of the guide portions 342 of each floating disc 34 is adapted to the guide holes 331, other structures on the floating disc 34 can be configured to have various specifications according to practical situations, so that the requirements of processing the connecting rods 600 of different specifications can be satisfied only by replacing the floating disc 34 without replacing other components of the honing fixture 100.

Figure 8 is a partial top view of an embodiment of the honing fixture for a connecting rod of the invention when the connecting rod is abutted against a locating block. With continued reference to fig. 2, in one or more embodiments, locating blocks 41 are provided on the first and second surfaces 31, 21. The positioning block 41 is matched with the outer surface of the big end 62 or the small end 63. When the connecting rods 600 are placed on the first separation surface 31 or the second surface 21, the big end 62 or the small end 63 abuts against the corresponding positioning block 41, so that quick positioning with low precision can be performed, and the center line of the inner hole 64 of each connecting rod 600 to be processed is approximately coincident. As shown in fig. 8, illustratively, when honing of the inner bores 64 on the large heads 62 of the plurality of links 600 is required, the large head 62 of the link 600 to be machined is placed on the first partition surface 31 with the outer wall of the large head 62 abutting against each of the positioning blocks 41. According to the theorem that a circle can be defined by three points, the points of contact of the large head 62 with the 3 positioning blocks 41 can define a circle, so that the center line of the inner hole 64 of the large head 62 passes approximately through the center of the circle defined by the three points. Since the arrangement of each floating disc 34 is the same and the center of the circle defined by the positioning block 41 on each floating disc 34 is the same in one honing process, the center line of the inner hole 64 of each link 600 mounted on the honing jig 100 can be substantially overlapped by abutting against the positioning block 41, and rough positioning can be achieved. It will be appreciated by those skilled in the art that the shape of the connecting rod 600 requires less precision in machining, and that the positioning by the positioning block 41 is coarse positioning because the constraint on the outer wall surface is insufficient to make the center line of the inner hole 64 to be machined on each connecting rod 600 coincide in height. In one or more embodiments, the positioning block 41 is configured as 3 positioning pins arranged at intervals in the circumferential direction. Alternatively, the locating pins may be configured in other suitable numbers, 3 or more, with the only requirement being that a circle be defined by 3 locating blocks 41 therein to control the centerlines of the bores 64 to be machined of each connecting rod 600 to substantially coincide. Alternatively, the positioning block 41 may be configured in other shapes that match the shape of the connecting rod 600, such as a substantially arc-shaped member that extends continuously over the first partition surface 31, or the like. Alternatively, the setting of the positioning block 41 may be canceled.

Figure 6 is an elevation view of an embodiment of the honing fixture for connecting rods of the invention in an initial state. In one or more embodiments, the honing fixture 100 has an initial state and a clamped state. In the initial state, the distance between the opposing first and second partition surfaces 31, 32, between the opposing first and first surfaces 11, 31 and between the opposing second and second surfaces 21, 32 is greater than the distance between the two bore end surfaces 641 of the connecting rod 600 in order to place the connecting rod 600 to be machined on the second and first partition surfaces 21, 31. In some embodiments, the connecting rod 600 is coarsely positioned by the positioning block 41 when it is placed on the second surface 21 and the first separation surface 31. In some embodiments, the first separation surface 31 of the floating disc 34 is flush with the tray surface 332 of the pallet 33, while the second separation surface 32 extends beyond the side of the pallet 33 facing the bottom 20, leaving a margin for avoiding collision with the pallet 33 during lifting of the link 600.

With continued reference to fig. 6 and 2, in one or more embodiments, a locating hole 43 is provided at the center of both the top 10 and floating disk 34. The aperture of the positioning hole 43 is larger than the aperture of the inner hole 64 to be processed of the connecting rod 600. Honing fixture 100 further includes positioning shaft 42, the shaft diameter of positioning shaft 42 matching the bore diameter of inner bore 64 of connecting rod 600. After the links 600 are positioned on the second surface 21 or the first dividing surface 31 by rough positioning (i.e., positioning on the second surface 21 or the first dividing surface 31 by the positioning block 41), the positioning shaft 42 may be mounted to the honing jig 100 and extend through the inner bore 64 and the positioning hole 43 so that the center lines of the inner bore 64 of each link 600 coincide, achieving a fine positioning of the links 600 to be machined to secure the honing effect. Alternatively, the fine positioning may be performed directly without rough positioning, or the center lines of each of the bores 64 may be coincident in other suitable ways, as the case may be.

In one or more embodiments, during the transition of the honing assembly from the initial condition to the gripping condition, the integral body formed by the top 10 and the backup plate 33 moves the connecting rod 600 disposed on the floating plate 34 together toward the bottom 20, reducing the distance between the second surface 21 and the second separating surface 32 adjacent thereto. First, the lowermost floating disk 34 contacts the lowermost link 600 and abuts against the link 600, thereby remaining stationary with the link 600 placed on the floating disk 34. By analogy, during the movement of the whole formed by the top 10 and the holding disk 33 towards the bottom 20, each floating disk 34 moves a distance relative to the corresponding holding disk 33, thereby reducing the distance between the first separating surface 31 of one floating disk 34 and the second separating surface 32 of the other floating disk 34 adjacent thereto, and finally reducing the distance between the first separating surface 31 of the uppermost floating disk 34 and the first surface 11, achieving the effect of clamping all the links 600 placed on the honing fixture 100 of the invention. Since each of the links 600 is moved toward the top 10 by a distance with respect to the initial state, the arrangement of the escape slots 333 effectively prevents the links 600 from interfering with the support tray 33.

Figure 7 is an elevation view of an embodiment of the honing fixture for connecting rods of the invention in a clamped state. In one or more embodiments, as shown in fig. 7, in the clamped state, the top 10, floating disc 34 and bottom 20 are all in close abutment with the connecting rod 600, i.e., the distance between the opposing first and second parting surfaces 31, 32, 11 and 31 and 21 and 32 is equal to the distance between the two bore end surfaces 641 of the connecting rod 600. After clamping the connecting rod 600, the function of the positioning shaft 42 has been fulfilled, and it can be removed from the inner bore 64 and the positioning hole 43 for performing the subsequent honing process.

Based on the orientation shown in fig. 7, in one or more embodiments, honing jig 100 further comprises a drive device 50, drive device 50 being operable to drive honing jig 100 between an initial state and a clamped state, specifically, switching from the initial state to the clamped state is operated as: the top 10 and the tray 33 fixedly connected to the top 10 are driven to move downward. The driving means 50 comprises a movable end 51 and a fixed end 52, wherein the fixed end 52 is fixedly connected with the bottom 20, and the movable end 51 is fixedly connected with the top 10, so that the supporting plate 33 connected with the top 10 can be driven through the top 10. Alternatively, a plurality of driving means 50 may be provided to control the top 10 and the partition assembly 30, respectively. The power source of the drive device 50 includes, but is not limited to, a servo motor, a cylinder, etc. Alternatively, the drive means 50 may be omitted, and the clamping force provided by screw tightening or the like. Alternatively, the movable end 51 and the fixed end 52 of the driving device 50 may be disposed at other suitable positions.

In alternative embodiments, honing fixture 100 may be configured to have other intermediate states as appropriate to facilitate the installation and removal of linkage 600.

Based on one or more of the above embodiments, one method of using the honing fixture for connecting rods of the invention is described in detail below: as shown in fig. 2 and 6, when the honing jig 100 is in the initial state, the driving device 50 drives the top 10 and the tray 33 fixedly connected to the top 10 to be located at a predetermined height. When the honing jig 100 is not put into the link 600, each floating plate 34 naturally falls down by gravity and is held on the backup plate 33 under the restriction of the limit flange 341. Wherein the distance between the first surface 11 and the first parting surface 31 adjacent to the first surface 11, the first parting surface 31 of one floating disc 34 and the second parting surface 32 of the other floating disc 34 adjacent thereto, and the second surface 21 and the second parting surface 32 adjacent to the second surface 21 are all greater than the distance between the two bore end surfaces 641 of the connecting rod 600 to be machined, such that an operator can place the connecting rod 600 in the honing jig 100 in a direction parallel to the second surface 21.

Then, with continued reference to fig. 6, the large ends 62 of the 5 connecting rods 600 of the same specification or the small ends 63 of the connecting rods 600 of the same specification may be placed on the first partition surface 31 and the second surface 21, and coarse positioning is performed by the positioning block 41, so that the center line of each inner hole 64 to be processed is approximately coincident. After coarse positioning is completed, the positioning shaft 42 matched with the aperture of the current inner hole 64 can sequentially extend from top to bottom through the positioning hole 43 on the top 10, the inner hole 64 of the connecting rod 600 and the positioning hole 43 on the floating disc 34, so that the center line of each inner hole 64 to be processed is overlapped with the axis of the positioning shaft 42 in height, the hole wall of each inner hole 64 can extend along the same direction, namely, along the axis direction of the positioning shaft 42, and fine positioning is realized.

With continued reference to fig. 6 and 7, the driving device 50 drives the top 10 and the 4 pallets 33 fixedly connected to the top 10 to move downward synchronously, i.e., the top 10 and the pallets 33 form a whole moving toward the bottom 20. During descent, the lowermost floating disc 34 will first touch the upwardly facing bore end face 641 of the connecting rod 600 resting on the second surface 21. Because of the sliding connection between the floating disc 34 and the support disc 33, the lowermost floating disc 34 is stationary after abutting the link 600, while the whole of the top 10 and the support disc 33 continues to move downwards. The second floating disc 34 is then driven by the tray 33 from the bottom up, and the distance between the second separating surface 32 on the second floating disc and the first separating surface 31 on the lowest floating disc 34 is gradually reduced, and finally touches the connecting rod 600 placed on the lowest floating disc 34, so that the second floating disc 34 from the bottom up is still. And so on, the whole of the top 10 and the tray 33 is continuously moved downward, and the third and fourth floating discs 34 are sequentially kept stationary after contacting with the link 600 of the lower layer as viewed from the bottom. The final top 10 is held stationary by the first surface 11 located thereon contacting the bore end surface 641 of the uppermost link 600 during the downward movement, and the honing fixture 100 is brought into a clamped state, achieving a clamping effect on all links 600 placed in the honing fixture 100. After clamping, the positioning shaft 42 is pulled out, and then a honing head of a honing apparatus may be placed into the inner bore 64 of the connecting rod 600 to perform one-time honing of the 5 connecting rods 600 clamped in the honing fixture 100.

In the prior art, the clamping mode is to clamp the connecting rods from top to bottom at one time after the connecting rods are directly stacked, and perform one-time processing. This machining is only suitable for the low-precision honing scenario, while in the high-precision honing, the prior art still uses a separate machining of each connecting rod. For the stacking installation mode in the prior art, the connecting rods are abutted against each other only through the end faces of the inner holes, and as the machining precision of the end faces of the inner holes is lower, the perpendicularity tolerance of the end faces of the inner holes and the central line of the inner holes is larger, and in the process that the connecting rods are stacked up layer by layer, the central line of the inner holes of the connecting rods positioned above is influenced by the tolerance of all connecting rods positioned below, and finally, the cylindricity tolerance of a cylindrical cavity formed by surrounding the inner holes of all the connecting rods together is overlarge, so that the high-precision honing requirement cannot be met. By adopting the honing fixture, the two inner hole end surfaces of the connecting rod only contact the first separation surface and the second separation surface which are parallel to each other, the tolerance between different connecting rods cannot be accumulated, the cylindricity tolerance of each inner hole can meet the requirement of high-precision honing, and meanwhile, a plurality of connecting rods can be honed at one time, so that the honing efficiency is greatly improved.

Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.

Claims (10)

1. A honing fixture for a connecting rod, characterized by comprising:

a top having a first surface;

A bottom portion spaced apart from the top portion, the bottom portion having a second surface facing the first surface; and

At least one separation assembly, the separation assembly sets up between first surface and the second surface, arbitrary separation assembly include the bearing dish with bearing dish sliding connection's floating disc, the bearing dish with top forms fixed connection, the floating disc has first division face and second division face, the second division face is located between first division face and the second surface, in the process that honing anchor clamps switch from initial state to clamp state, the distance between first surface and its adjacent first division face is reduced to press from both sides tight connecting rod, and the second surface and its adjacent second division face's distance is reduced to press from both sides tight another connecting rod.

2. The honing fixture for a connecting rod as claimed in claim 1, wherein,

The dividing members are plural and spaced apart from each other, and a distance between the first dividing surface of one of the dividing members and the second dividing surface of the other of the dividing members adjacent thereto is reduced to clamp the connecting rod during the switching of the honing jig from the initial state to the clamped state.

3. A honing fixture for a connecting rod as claimed in claim 1 or 2, characterized in that a guide hole is provided on any one of the carrier plates, the floating plate has a guide portion fitted with the guide hole, and at least part of the guide portion is always accommodated in the guide hole during switching of the honing fixture from the initial state to the clamped state.

4. A honing fixture for a linkage as claimed in claim 3, characterized in that the floating plate further comprises a limit flange, movement of the floating plate relative to the backup plate toward the bottom being limited by the limit flange.

5. A honing jig for a connecting rod as claimed in claim 4, characterized in that,

The holding pan has a tray surface facing the top;

And a mounting groove recessed toward the interior of the bearing plate is formed on the inner wall of the guide hole, the mounting groove is provided with an opening formed on the surface of the tray, and the limit flange can be accommodated in the mounting groove.

6. A honing jig for a connecting rod as claimed in claim 1 or 2, characterized in that a side of the carrier plate facing the bottom is formed with an inwardly recessed relief groove adapted to receive a shaft of the connecting rod in the clamped state.

7. A honing fixture for a connecting rod as claimed in claim 1 or 2, characterized in that positioning blocks are provided on the first and second surfaces, the positioning blocks being adapted to abut against an outer surface of the connecting rod.

8. A honing jig for a connecting rod as claimed in claim 1 or 2, wherein either one of the floating disc and the top is formed with a positioning hole;

the honing fixture also includes a locating shaft configured to extend through each of the locating holes and the bore of each of the links after the links are disposed on the first and second faces.

9. A honing jig for a connecting rod as claimed in claim 8, wherein the positioning shaft is mounted into the positioning hole and the bore before the connecting rod is clamped, and the positioning shaft is moved out of the positioning hole and the bore after the connecting rod is clamped.

10. A honing fixture for a connecting rod as claimed in claim 1 or 2, characterized by further comprising a driving device that can drive the honing fixture to switch between an initial state and a clamped state;

The driving device comprises a moving end and a fixed end, wherein the moving end is fixedly connected with the top or any bearing disc, and the fixed end is fixedly connected with the bottom.