JP3389172B2 - Rotary shaft oil supply structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To communicate plural oil passages extending in the shaft direction and plural oil passages extending in the radial direction by an optional combination. SOLUTION: A first shaft directional oil passage 21 extending in a hollow tube 14, a second shaft directional oil passage 22 extending on the outer peripheral side of the hollow tube and first/second radial directional oil passages 24, 25 formed in different positions in the shaft direction are communicated by a connecting plug 30 pressed in a shaft directional hole 23. The connecting plug has a first communicating hole 38a communicating with the first shaft directional oil passage by inserting the tip of the hollow tube 14, a second communicating hole 38b penetrated through the first communicating hole from a chamfer groove 34a in the same shaft directional position as the first radial directional oil passage, a ring-shaped groove 35 communicating with the second radial directional oil passage by being formed in the same shaft directional position as the second radial directional oil passage and a third communicating hole 39 continuing with the ring-shaped groove by extening in the shaft direction so as to avoid the chamfer groove on the outer diameter side from the first communicating hole.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil supply for supplying hydraulic oil, lubricating oil, etc., through a rotary shaft to a transmission or the like arranged on the rotary shaft, such as the rotary shaft of a transmission. Regarding the structure.

[0002]

2. Description of the Related Art In a transmission or the like, a clutch, a gear, etc. are arranged on a rotary shaft, the operation of the clutch is controlled by the hydraulic pressure supplied through the rotary shaft, and the oil similarly supplied through the rotary shaft. Lubricates the clutch, gears, etc. For this reason, it is necessary to provide a plurality of oil supply passages on the rotary shaft, form an axial hole extending in the axial direction from the end of the rotary shaft, and insert a hollow tube into this axial hole to It has been practiced to configure a plurality of oil supply passages by dividing them into an oil passage that extends and an oil passage that extends while being surrounded by the outer peripheral surface of the hollow tube and the inner peripheral surface of the axial hole. -184820 gazette).

[0003]

By the way, when the two oil passages are formed by using the hollow tube as described above, the two oil passages are connected to the axial oil passage on the outer peripheral side of the hollow tube and extend in the radial direction to penetrate the outer peripheral surface. Provide a radial oil passage on the front side,
A radial oil passage is provided on the inner side, which is connected to the oil passage in the hollow tube and extends in the radial direction and penetrates the outer peripheral surface. However, there are cases where the arrangement position of each oil passage is limited in forming the oil passage, and it is necessary to provide the radial oil passage at a position opposite to the above. In such cases,
There is a problem that it is difficult to deal with it simply by using a hollow tube.

The present invention has been made in view of these problems.
An oil supply structure for a rotating shaft that allows a plurality of oil passages that extend in the axial direction and a plurality of oil passages that extend in the radial direction to communicate with each other in any combination and that enables highly selective oil supply. The purpose is to provide.

[0005]

In order to achieve such an object, in the present invention, a shaft formed by extending a rotating shaft (for example, the transmission counter shaft 12 in the embodiment) from the shaft end portion in the axial direction. Insert a hollow tube (for example, the first tube 14 in the embodiment) into the direction hole,
A second axial oil passage extending in the hollow tube, and a second axial oil passage surrounded by the outer peripheral surface of the hollow tube and the inner peripheral surface of the axial hole.
An axial oil passage is formed from the axial oil passage, and at a predetermined axial position, a first radial oil passage formed of at least one hole extending from the axial hole to the outer peripheral surface and a predetermined axial position are provided. A radial oil passage is formed by a second radial oil passage formed of at least one hole penetrating from the axial hole to the outer peripheral surface at a position apart from the axial direction, and a connecting plug press-fitted into the axial hole is used. The oil supply structure is configured so that the first axial oil passage communicates with the first radial oil passage and the second axial oil passage communicates with the second radial oil passage. At this time, the connecting plug, in a state of being press-fitted into the axial hole, inserts the tip of the hollow tube into the first communicating hole extending in the axial direction and communicating with the first axial oil passage, and the first radial oil. A second groove extending radially from a chamfered groove formed in a part of the outer peripheral surface at the same axial position as the path and penetrating the first communication hole.
Avoid the communication hole, the ring-shaped groove formed on the outer peripheral surface at the same axial position as the second radial oil passage and communicating with the second radial oil passage, and the chamfered groove on the outer diameter side of the first communication hole. Thus, it is formed having a third communication hole that extends in the axial direction and that is connected to the ring-shaped groove from the side end surface that faces the second axial oil passage.

In the above oil supply structure, the connection is made even when the first radial oil passage is located on the inner side in the axial direction and the second radial oil passage is located on the front side with respect to the axial hole. By the plug, it is easy to connect the first axial oil passage and the first radial oil passage and the second axial oil passage and the second radial oil passage. Particularly, in the connecting plug, since the chamfering groove is formed in a part of the outer peripheral surface at the same axial position as the first radial oil passage, the side end surface facing the second axial oil passage is changed to the ring-shaped groove. The connected third communication hole can be formed by a hole having a large diameter at a position avoiding the chamfer groove, and there is an advantage that the connection plug can be easily manufactured.

A third axial oil passage is formed on the opposite side of the first and second axial oil passages by being partitioned by a connecting plug press-fitted into the axial hole. The third radial oil passage may be formed by extending in the direction and penetrating the outer peripheral surface of the rotary shaft. Thereby, the third oil supply passage can be easily configured.

Further, the first radial oil passage is formed by a plurality of radial through holes extending in the radial direction, and at least one of the radial directions is irrespective of the rotational position when the connecting plug is press-fitted into the axial hole. It is desirable to configure the through hole so as to communicate with the chamfered groove. Similarly, chamfering grooves are formed at a plurality of locations on the outer peripheral surface of the connecting plug, and at least one of the chamfering grooves serves as the first radial oil passage regardless of the rotational direction position when the connecting plug is press-fitted into the axial hole. It is desirable to be configured to communicate.

Also in the present invention, similarly to the above-mentioned invention, the first tube extends in the hollow tube by inserting the hollow tube into the axial hole formed by extending the rotary shaft from the axial end portion in the axial direction. The axial oil passage is configured by the axial oil passage and the second axial oil passage that is surrounded by the outer peripheral surface of the hollow tube and the inner peripheral surface of the axial hole and extends. From a first radial oil passage formed of at least one hole penetrating and extending to the surface, and from at least one hole extending from the axial hole to the outer peripheral surface at a position axially separated from a predetermined axial position And a second radial oil passage, the first radial oil passage is communicated with the first radial oil passage by a connecting plug press-fitted into the axial hole, and the second radial oil passage is formed. Is connected to the second radial oil passage. It is made. However, at this time, in the state where the connecting plug is press-fitted into the axial hole, the distal end of the hollow tube is inserted and the first communicating hole extending in the axial direction communicating with the first axial oil passage and the first radial direction are formed. At the same axial position as the oil passage, the second communication hole penetrating from the first communication hole to the outer peripheral surface and extending in the radial direction, and having the shape widened on the outer peripheral surface side, and the second radial oil path are the same. A ring-shaped groove that is formed on the outer peripheral surface at the axial position and communicates with the second radial hole, and extends axially so as to avoid the second communication hole on the outer diameter side of the first communication hole, and the second axial direction. It is formed with a third communication hole that is connected to the ring-shaped groove from the side end surface facing the oil passage. A plurality of first radial oil passages and second communication holes are formed, and at least one of the first radial oil passages is irrespective of the rotational position when the connecting plug is press-fitted into the axial hole. Communicates with the second communication hole.

Also in the oil supply structure described above, the connection is made even when the first radial oil passage is located on the axial rear side with respect to the axial hole and the second radial oil passage is located on the front side. By the plug, it is easy to connect the first axial oil passage and the first radial oil passage and the second axial oil passage and the second radial oil passage. Particularly, in the connecting plug, since only the plurality of second communication holes that are widened toward the outer peripheral surface are formed at the same axial position as the first radial oil passage, the side facing the second axial oil passage is formed. The third communication hole connected from the end face to the ring-shaped groove can be formed by a hole having a large diameter at a position avoiding the second communication hole, which is advantageous in that the connection plug can be easily manufactured.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows a belt type continuously variable transmission TM using a rotating shaft having an oil supply structure according to the present invention. This belt type continuously variable transmission TM includes a forward / reverse switching device 3, a belt type continuously variable transmission device 4, a starting clutch device 5, a reduction gear train 6, a differential mechanism 7, and a chain type power transmission device in a transmission housing 2. And a hydraulic pump 9 driven by an input shaft 11, and the right end surface of the transmission housing is joined to the engine. The crankshaft Ks of the engine is connected to the transmission input shaft 11 via the damper mechanism 1.

Therefore, in the transmission TM, the drive power of the engine is transmitted to the transmission input shaft 11 and the forward / reverse switching device 3 controls the rotational direction, and then the belt type continuously variable transmission 4 (transmission input). A drive pulley 15 disposed on the shaft 11, a driven pulley 16 disposed on the transmission counter shaft 12, and a V belt 14 hung on both pulleys 15 and 16) The shift control is performed and transmitted to the transmission counter shaft 12. Further, after power transmission control is performed from the transmission counter shaft 12 by the starting clutch device 5, the left and right wheels (not shown) from the differential mechanism 7 via the reduction gear train 6 and the left and right axle shafts 8a and 8b. Be transmitted to.

In this transmission TM, the oil supply structure according to the present invention is used in the starting clutch device 5 arranged on the transmission counter shaft 12. In order to show this oil supply structure in detail, FIG. 3 shows the transmission counter shaft 12, the driven pulley 16, the reduction gear train 6, the starting clutch device 5 and the like arranged on the transmission counter shaft 12, and FIG. 1 shows the starting clutch device. 5 is further enlarged and shown, and these figures will be described together.

A driven pulley 16 is fixedly mounted on the transmission counter shaft 12, and the transmission counter shaft 12 rotates with respect to the transmission housing 2 by bearings 17a and 17b arranged on both sides of the driven pulley 16. It is supported freely. In FIG. 3, a first reduction gear 61 constituting the reduction gear train 6 is rotatably supported by a bearing 63 and disposed on the transmission counter shaft 12 on the right side of the bearing 17a.
Reference numeral 1 meshes with the second reduction gear 62. First reduction gear 6
A starting clutch device 5 for controlling engagement / disengagement of the transmission counter shaft 12 and the first reduction gear 61 is disposed on the right side of 1. The starting clutch device 5 performs driving force transmission control to control starting / stopping. Is done.

In the starting clutch device 5, as shown in FIG. 1, a clutch housing 51 is attached so as to be coupled to the transmission counter shaft 12, and a clutch piston 52, a clutch plate 53 and a clutch disc are provided in the clutch housing 51. 54, end plate 55
Is inserted and is held by the circlip 56 to configure the starting clutch device 5. At this time, a plurality of clutch plates 53 and clutch discs 54 are alternately stacked and arranged. The outer peripheral portion of the clutch plate 53 is splined to the outer peripheral end portion of the clutch case 51, and the clutch plate 53 is movable in the axial direction and rotates integrally with the clutch case 51. Further, the inner peripheral portion of the clutch disc 54 is spline-engaged with a clutch spline portion 61a integrally connected to the first reduction gear 61,
The clutch disc 54 is movable in the axial direction and rotates integrally with the first reduction gear 61.

The clutch piston 52 receives the clutch pressure supplied into the clutch chamber 45 formed by the clutch housing 51 and the clutch piston 52, and is pressed in the left direction in the figure, so that the clutch plate 53 and the clutch disc 54 are closed. Press on the end plate 55. Therefore, if the clutch pressure supply control is performed, the friction engagement control between the clutch plate 53 and the clutch disc 54 can be performed, and the driving force transmission control from the transmission counter shaft 12 to the reduction gear train 6, that is, the start control is performed. It is possible.

A canceller piston 58 is inserted in the clutch piston 52, and both pistons 52, 5 are inserted.
Surrounded by 8 is a canceller chamber 46. A return spring 57 is arranged in the canceller chamber 46. The canceller chamber 46 is filled with extremely low-pressure oil (this is called canceller oil),
When the transmission counter shaft 12 is rotated in a state where the clutch hydraulic pressure in the clutch chamber 45 is low and the starting clutch device 5 is released, a centrifugal hydraulic pressure that cancels the centrifugal hydraulic pressure generated in the clutch chamber 45 is generated. Let
As a result, it is possible to reliably prevent the starting clutch from being weakly engaged by the centrifugal oil pressure generated in the clutch chamber 45 when the starting clutch is disengaged to generate drag torque.

In the starting clutch device 5 having such a structure, the clutch oil is supplied to the clutch chamber 45, the canceller oil is supplied to the canceller chamber 46, and the contact portion between the clutch plate 53 and the clutch disc 54 is lubricated and cooled. It is necessary to supply the lubricating oil for. Since the clutch oil, the canceller oil, and the lubricating oil are independently controlled for oil pressure setting, they must be supplied through different oil passages. For this reason, the transmission counter shaft 12 has a first end formed in the axial direction from the left end.
An axial hole 13 and a second axial hole 23 extending in the axial direction from the right end are formed, and the holes 13 and 23 communicate with each other. The first tube 14 is inserted into the first axial hole 13, the connecting plug 30 is press-fitted into the second axial hole 23, and the second tube 42 is inserted. A first axial oil passage 21 for supplying lubricating oil is formed in the first tube 14, and the outer circumference of the first tube 14 and the first
A second axial oil passage 22 for supplying canceller oil is formed surrounded by the axial hole 13, and a third axial oil passage 43 for supplying clutch oil is formed in the second tube 42.

In the transmission counter shaft 12 and the clutch case 51, the first radial oil passages 24 and 51a, the second radial oil passages 25 and 51b, and the third radial oil passages 26 and 51c extending in the radial direction are respectively provided. Are formed. These radial oil passages are respectively connected to the transmission counter shaft 1
An oil passage communicating with the ring upper groove formed on the outer peripheral surface of No. 2 and extending in the radial direction to be connected. The first radial oil passage 51a is connected to the outer peripheral surface via a through hole 58a formed in the canceller piston 58.

The first axial oil passage 2 constructed as described above.
1 and the first radial oil passages 24 and 51a are communicated with each other, the second axial oil passage 22 and the second radial oil passages 25 and 51b are communicated with each other, and the third axial oil passage 43 and the third radial oil passage are connected. Oil passage 23, 51c
And the connecting plug 30 for communicating with the second axial hole 23.
It is press-fitted and installed in. This connecting plug 30 is shown in FIGS. 4 and 5, and a state in which the connecting plug 30 is press-fitted into the second axial hole 23 of the transmission counter shaft 12 is schematically shown in FIG. 6, and the structure of the connecting shaft 30 is shown. And the functions will be described with reference to these figures.

The connecting plug 30 has first, second and third land portions 31, 32 and 33 which are fitted in the second axial hole 23. A shallow ring-shaped first ring groove 34 (this groove does not have to be formed) is provided between the first and second land portions 31 and 32, and the first ring groove 34 has three circumferentially equally spaced grooves. A chamfered groove 34a (see FIG. 6B) is formed at the location. A deep ring-shaped second ring groove 35 is formed between the second and third land portions 32 and 33, and
A small-diameter projection 36 is formed on the outside of the land 33. A first communication hole 38a is formed on the outer end surface 31a of the first land portion 31 so as to extend in the axial direction.
A second communication hole 38b is formed from a through the chamfer groove 34a. In addition, the outer end surface 31 of the first land portion 31
Three third communication holes 39 extending axially between the chamfered grooves 34a and penetrating the second ring groove 35 are formed on the outer peripheral side of the first communication hole 38a. Here, since a sufficient thickness is ensured between the chamfering grooves 34a, the third communication hole 39 can be a hole having a relatively large diameter,
It is easy to process and form the third communication hole 39.

With the connecting plug 30 having such a shape being press-fitted into the second axial hole 23, the first ring-shaped groove 34 having the chamfered groove 34a axially overlaps the first radial oil passage 24, The second ring-shaped groove 35 axially overlaps the second radial oil passage 25, and the third radial oil passage 26 is located on the right side of the third land portion 33.

Here, the tip of the first tube 14 inserted into the first axial hole 13 is inserted into the first communication hole 38a,
The first axial oil passage 21 is connected to the first communication hole 38a and the second communication hole 38b. The chamfered grooves 34a in which the second communication holes 38b are opened are formed at three locations at equal intervals on the circumference, and the first radial oil passages 24 are formed in the transmission counter shaft 12.
Since it is formed in four places at equal intervals on the circumference,
As shown in (B) and (C), regardless of the position of the connecting plug 30 in the rotation direction, the first axial oil passage 21 and the first diameter can be set (provided that the axial press-fitting position is set correctly). The direction oil passage 24 is always in communication. The first axial oil passage 2
1, the lubricating oil is supplied to the first and second communication holes 38a, 38b of the connecting plug 30 and the first radial oil passage 24,
Clutch plate 5 through 51a and through hole 58a
Lubricating oil is supplied to the contact portion between the clutch 3 and the clutch disk 54.

On the other hand, the second axial oil passage 22 located on the outer peripheral side of the first tube 14 is connected to the second ring-shaped groove 35 via the third communication hole 39, and further to the second radial oil passage 25. Connect. Canceller oil (extremely low pressure oil) is supplied to the second axial oil passage 22, the canceller oil is supplied to the second ring-shaped groove 35 through the third communication hole 39, and further, the second axial direction. It is supplied to the canceller chamber 46 through the oil passages 25 and 51b.

As shown in FIG. 1, the second tube 42 is inserted into the second axial hole 23 from the right end of the transmission counter shaft 12 and is press-fitted into the second axial hole 23. It is inserted into the insertion hole 41. As a result, the third axial oil passage 43 formed in the second tube 42 for supplying the clutch oil is connected to the space formed on the left side of the connecting plug 30, and this space is further connected to the third radial oil passage. It connects to the roads 26 and 51c. Therefore, the clutch oil is
The oil is supplied to the clutch chamber 45 via these oil passages and biases the clutch piston 52 to the left.

As described above, in the oil supply structure of this embodiment, the first plugs 30 are used so that the first axial oil passage 21 formed in the first tube 14 is located on the front side. The first tube 14 is made to communicate with the direction oil passage 24.
It is possible to communicate the second axial oil passage 22 formed on the outer peripheral side with the second radial oil passage located on the inner side. Further, in this connection plug 30, the first radial oil passage 24
Chamfered grooves 3 that are formed at three locations on the circumference to communicate with
4a, it is possible to increase the thickness of the portion where the third communication hole 39 is formed, and it is easy to form the third communication hole 39 from a hole having a large diameter. .

In the above example, the chamfering grooves 34a are formed at three positions at equal intervals on the circumference, but the number is not limited to this, and for example, as shown in FIG. The chamfered groove 34a at one place may be used. However, the first radial oil passage 2
As shown in FIG. 7B, 4 are formed at equal intervals on the circumference of the circle, for example, and any of the chamfering grooves 34a is formed at any position in the rotational direction of the connecting plug 30, as shown in FIG. 7B. Need to be configured to communicate with the first radial oil passage 24. For this reason, the number of the first radial oil passages 24 may be increased, for example, as shown in FIG.

Further, as shown in FIG.
a may be formed in two places, and in this case as well,
As shown in (B), the first radial oil passages 24 are formed at four positions on the circumference at equal intervals so that the chamfering groove 34a can be located at any position in the rotational direction of the connecting plug 30. First
It must be configured to communicate with the radial oil passage 24.
For this reason, the number of the first radial oil passages 24 may be increased, for example, as shown in FIG. Further, as shown in FIG. 9, chamfered grooves 34a may be formed at four places. By increasing the number of chamfering grooves 34a in this manner, the number of first radial oil passages 24 can be reduced.

In each of the above examples, the chamfered groove 34a is used to widen the communication area with the first radial oil passage 24, and the positioning of the connecting plug 30 in the rotational direction is unnecessary, but for the same purpose, FIG. As shown in the drawing, the chamfered groove may not be formed, and the enlarged diameter portion 38c that expands in a tapered shape may be provided on the outer peripheral end side of the second communication hole 38b. However, in this case, the expanded portion 3
Since the spread of 8c cannot be made so large, the first radial oil passages 24 are formed at five locations on the circumference at equal intervals. As a result, as shown in FIG. 10B, any of the second communication holes 3 is irrespective of the position of the connecting plug 30 in the rotation direction.
8b communicates with one of the first radial oil passages 24.

Further, as shown in FIG. 11, the chamfered groove may not be formed, and the second communication hole 38b 'may be a tapered hole. However, in this case, since the outer diameter cannot be increased so much, the first radial oil passages 24 are formed at five locations on the circumference at equal intervals. As a result, FIG.
As shown in FIG. 5, any of the second communication holes 38b ′ communicates with any of the first radial oil passages 24 regardless of the position of the connecting plug 30 in the rotational direction.

[0031]

As described above, according to the present invention,
The oil supply structure is configured such that the first axial oil passage is communicated with the first radial oil passage and the second axial oil passage is communicated with the second radial oil passage by the connection plug press-fitted into the axial hole. At this time, the connecting plug, in the state of being press-fitted into the axial hole, inserts the distal end of the hollow tube into the first communicating hole which extends in the axial direction and communicates with the first axial oil passage, and the first connecting hole. A second communication hole that extends in a radial direction from a chamfering groove formed in a part of the outer peripheral surface at the same axial position as the first radial oil passage, the second communication hole extending in the radial direction; A ring-shaped groove that is formed on the outer peripheral surface at the same axial position and communicates with the second radial oil passage, and extends axially so as to avoid the chamfered groove on the outer diameter side of the first communication hole. With a third communicating hole that is connected to the ring-shaped groove from the side end surface facing the direction oil passage. Since the first relative axial bore
Even when the radial oil passage is located on the rear side in the axial direction and the second radial oil passage is located on the front side, the connection plug connects the first axial oil passage and the first radial oil passage. At the same time, it is easy to connect the second axial oil passage and the second radial oil passage. Particularly, in the connecting plug, since the chamfering groove is formed in a part of the outer peripheral surface at the same axial position as the first radial oil passage, the side end surface facing the second axial oil passage is changed to the ring-shaped groove. The connected third communication hole can be formed by a hole having a large diameter at a position avoiding the chamfer groove, and there is an advantage that the connection plug can be easily manufactured.

A third axial oil passage is formed on the opposite side of the first and second axial oil passages by being partitioned by a connecting plug press-fitted into the axial hole. The third radial oil passage may be formed by extending in the direction and penetrating the outer peripheral surface of the rotary shaft. Thereby, the third oil supply passage can be easily configured.

Further, the first radial oil passage is formed by a plurality of radial through holes extending in the radial direction, and at least one of the radial directions is irrespective of the rotational position when the connecting plug is press-fitted into the axial hole. It is desirable to configure the through hole so as to communicate with the chamfered groove. Similarly, chamfering grooves are formed at a plurality of locations on the outer peripheral surface of the connecting plug, and at least one of the chamfering grooves serves as the first radial oil passage regardless of the rotational direction position when the connecting plug is press-fitted into the axial hole. It is desirable to be configured to communicate.

According to another aspect of the present invention, the connecting plug has the first axially extending first axially communicating with the first axial oil passage when the distal end of the hollow tube is inserted in the axially press-fitted state. A communication hole, a second communication hole that penetrates from the first communication hole to the outer peripheral surface and extends in the radial direction at the same axial position as the first radial oil passage, and has a shape that widens on the outer peripheral surface side; The ring-shaped groove formed on the outer peripheral surface at the same axial position as the two radial oil passages and communicating with the second radial hole, and the second communication hole on the outer diameter side of the first communication hole while avoiding the shaft. And a third communication hole extending from the side end surface facing the second axial oil passage to the ring-shaped groove, and a plurality of first radial oil passages and second communication holes are formed and connected. Regardless of the rotational position when the plug is pressed into the axial hole At least one first radial oil passage is configured to communicate with at least one of the second communication holes. Therefore, even when the first radial oil passage is located on the rear side in the axial direction and the second radial oil passage is located on the front side with respect to the axial hole, the first radial oil passage is located on the front side by the connecting plug.
It is easy to connect the axial oil passage and the first radial oil passage and the second axial oil passage and the second radial oil passage. Particularly, in the connecting plug, since only the plurality of second communication holes that are widened toward the outer peripheral surface are formed at the same axial position as the first radial oil passage, the side facing the second axial oil passage is formed. The third communication hole connected from the end face to the ring-shaped groove can be formed by a hole having a large diameter at a position avoiding the second communication hole, which is advantageous in that the connection plug can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the vicinity of a starting clutch device having a rotary shaft oil supply structure according to the present invention.

FIG. 2 is a sectional view showing a structure of a transmission using the starting clutch device.

FIG. 3 is a sectional view showing a structure around a transmission counter shaft in the transmission.

FIG. 4 is a perspective view of a connection plug that constitutes an oil supply structure for a rotary shaft according to the present invention.

5A and 5B are a side view and a front view of a connecting plug that constitutes an oil supply structure for a rotary shaft according to the present invention.

FIG. 6 is a cross-sectional view showing a state in which the connecting plug is press-fitted into a transmission counter shaft.

FIG. 7 is a cross-sectional view showing a modified example of the connection plug in a state in which it is press-fitted into a transmission counter shaft.

FIG. 8 is a cross-sectional view showing a second modified example of the connecting plug in a state in which it is press-fitted into a transmission counter shaft.

FIG. 9 is a cross-sectional view showing a third modified example of the connection plug in a state in which it is press-fitted into a transmission counter shaft.

FIG. 10 is a cross-sectional view showing a fourth modified example of the connecting plug in a state in which it is press-fitted into a transmission counter shaft.

FIG. 11 is a cross-sectional view showing a fifth modified example of the connecting plug in a state in which it is press-fitted onto a transmission counter shaft.

[Explanation of symbols]

5 Start clutch device 12 Transmission counter shaft (transmission counter shaft) 13 1st axial hole 14 1st tube 21 1st axial oil passage 22 2nd axial oil passage 23 2nd axial hole 24, 51a 1st Radial oil passages 25, 51b Second radial oil passages 26, 51c Third radial oil passage 30 Connection plug 34a Chamfer groove 35 Ring-shaped groove 38a First communication hole 38b Second communication hole 39 Third communication hole 42 Second Tube 43 Third axial oil passage

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-10-184820 (JP, A) JP-A-10-252850 (JP, A) Actual development Sho 62-22358 (JP, U) (58) Field (Int.Cl. ⁷ , DB name) F16H 57/00-57/12 F16H 3/00-3/78

Claims (5)

(57) [Claims] 1. A rotary shaft via an axial oil passage extending axially in a rotary shaft rotatably supported and a radial oil passage radially extending in the rotary shaft. In an oil supply structure for transferring oil to and from the outer peripheral side of the hollow tube, a hollow tube is inserted into an axial hole formed by extending the rotary shaft in the axial direction from the shaft end, and a hollow tube extending in the hollow tube is formed. The axial oil passage is composed of one axial oil passage, and a second axial oil passage that extends while being surrounded by the outer peripheral surface of the hollow tube and the inner peripheral surface of the axial hole, and at a predetermined axial position. A first radial oil passage formed of at least one hole extending from the axial hole to the outer peripheral surface, and penetrating from the axial hole to the outer peripheral surface at a position axially separated from the predetermined axial position. Second diameter consisting of at least one hole The radial oil passage is configured by a facing oil passage and is press-fitted into the axial hole to communicate the first axial oil passage with the first radial oil passage and the second axial oil passage. A connecting plug that communicates with the second radial oil passage, wherein the connecting plug communicates with the first axial oil passage by inserting the tip of the hollow tube in a state of being press-fitted into the axial hole. And a first communication hole extending in the axial direction, and a chamfered groove formed in a part of the outer peripheral surface at the same axial position as the first radial oil passage to penetrate the first communication hole in the radial direction. A second communicating hole extending; a ring-shaped groove formed on the outer peripheral surface of the connecting plug at the same axial position as the second radial oil passage to communicate with the second radial oil passage; Avoid the chamfered groove on the outer diameter side of the communication hole in the axial direction. Extending oil supply structure of the rotary shaft, characterized in that it has a third communication hole extending from a side end face facing the ring-shaped groove in the second axial oil passage. 2. A third axial oil passage formed on the side opposite to the first and second axial oil passages, which is partitioned by the connecting plug press-fitted into the axial hole, and the third axial passage. The oil supply structure for a rotating shaft according to claim 1, further comprising a third radial oil passage extending radially from the oil passage and penetratingly formed on an outer peripheral surface of the rotating shaft. 3. The first radial oil passage is formed of a plurality of radial through holes extending in the radial direction, regardless of the rotational position when the connecting plug is press-fit into the axial hole.
The oil supply structure for a rotating shaft according to claim 1, wherein at least one of the radial through holes communicates with the chamfered groove. 4. The chamfer groove is formed at a plurality of locations on the outer peripheral surface of the connecting plug, and at least one of the chamfer grooves is formed regardless of the rotational direction position when the connecting plug is press-fitted into the axial hole. The oil supply structure for a rotating shaft according to claim 1, wherein the oil supply structure communicates with the first radial oil passage. 5. The rotating shaft via an axial oil passage extending axially in a rotatably supported rotating shaft and a radial oil passage extending radially in the rotating shaft. In the oil supply structure for supplying oil to the outer peripheral side of the hollow tube, a hollow tube is inserted into an axial hole formed by extending the rotary shaft in an axial direction from a shaft end, and a first tube extending in the hollow tube is formed. The axial oil passage is composed of an axial oil passage and a second axial oil passage that extends while being surrounded by the outer peripheral surface of the hollow tube and the inner peripheral surface of the axial hole. A first radial oil passage formed by at least one hole extending from the axial hole to the outer peripheral surface, and penetrating from the axial hole to the outer peripheral surface at a position axially separated from the predetermined axial position. Second radial oil consisting of at least one hole extending And the radial oil passage is configured by and is press-fitted into the axial hole to communicate the first axial oil passage with the first radial oil passage and the second axial oil passage to the second axial oil passage. An axial direction communicating with the first axial oil passage by inserting a tip of the hollow tube in a state where the connecting plug is press-fitted into the axial hole; And a first communication hole extending in a radial direction penetrating from the first communication hole to the outer peripheral surface at the same axial position as the first radial oil passage and extending radially on the outer peripheral surface side. A second communication hole, a ring-shaped groove formed on the outer peripheral surface at the same axial position as the second radial oil passage and communicating with the second radial hole, and on the outer diameter side of the first communication hole. In the axial direction, avoiding the second communication hole And a third communication hole that is connected to the ring-shaped groove from a side end surface facing the second axial oil passage, and the first radial oil passage and the second communication hole are formed in plural. At least one of the first radial oil passages communicates with any of the second communication holes regardless of a rotational position when the connecting plug is press-fitted into the axial hole. Oil supply structure for rotating shaft.