Heavy catenary chain conveying system with transfer machine and capable of preventing bearing trolley group from turning around
Technical Field
The invention relates to a heavy catenary conveying system, in particular to a heavy catenary conveying system with a transitional machine, wherein a bearing trolley group is arranged under limited workshop space conditions and is free of turning around.
Background
Engineering machines such as crane, excavator, forklift, tower crane, most are accomplished production through automatic production line, and the production process of these engineering machines generally is: firstly, finishing the blanking and assembly welding forming of a forming material in a welding workshop; then, transferring the assembly welding formed workpiece to a coating workshop for spraying the workpiece; after the spraying is finished, the sprayed workpiece is transported to a final assembly workshop, and the final assembly of a finished product is finished; the conveying of the workpiece in the coating workshop is completed through an aerial catenary device, and the structure of the aerial catenary is as follows: the method comprises the following steps that a stand column with the length more than seven meters is arranged on the workshop ground, a longitudinal beam is lapped on the stand column, and a catenary chain conveying line system is installed below the longitudinal beam and the transverse beam in a hanging mode; the catenary chain conveying line system is provided with an upper conveying track and a lower conveying track, the upper conveying track is a catenary chain conveying track, and the lower conveying track is a walking track for bearing a trolley group; the closed catenary chain is arranged on the catenary chain conveying track and conveys and rotates in a unidirectional way, a catenary chain system is a closed loop operation circulating system usually driven by a driving motor, in operation, the catenary chain operates in a unidirectional transmission way in a closed loop along a clockwise direction or an anticlockwise direction, and pushing heads are arranged on the closed catenary chain at intervals; the trolley comprises a trolley body, a lifting claw, a trolley head and a trolley frame, wherein the trolley body is provided with a lifting claw, the lifting claw is arranged on the lifting claw, the trolley body is provided with a lifting beam, the lifting beam is arranged on the lifting beam, the lifting beam is connected with a workpiece to be machined, the trolley body is provided with a plurality of lifting claws, the lifting claws are arranged on the lifting claws, the trolley body is driven to move by the aid of the trolley head arranged on a catenary chain in a matched mode, namely, the trolley body is free of walking power, and the trolley body completely runs by means of the trolley head running together with the catenary chain.
The catenary chain conveying system realizes the simultaneous processing and conveying of the processed workpieces, one or more storage areas (also called accumulation areas) are generally arranged on a production line in the workpiece conveying process, and the storage areas are used for storing a certain number of workpieces and preparing for the next workpiece processing technology; the storage of the workpieces in the storage area is realized by the accumulation of the bearing trolley groups, when the first bearing trolley group runs to the storage area, the push head on the catenary needs to be separated from the lifting claw on the first bearing trolley group, the push head and the catenary continue to run forwards, the first bearing trolley group loses power and stops running, and when the subsequent bearing trolley group runs to be contacted with the bearing trolley stopped by the front group, the lifting claw of the subsequent bearing trolley group can be automatically separated from the push head matched with the subsequent bearing trolley group on the catenary and also stops running, so that the processed workpieces are accumulated in the storage area.
In a catenary chain conveying system, in order to realize that a bearing trolley group automatically runs along with the running of a catenary chain, after entering a stacking area, the bearing trolley group can also automatically stop a plurality of groups of bearing trolley groups to finish stacking actions, and the prior art is realized by arranging a swing arm and an inclined fork on a bearing trolley body; the front end of the car body of each bearing trolley is provided with a pin shaft, a swing arm is hinged on the pin shaft, the middle part of the swing arm is hinged with the pin shaft, the swing arm is like a seesaw, the pin shaft is like a fulcrum of the seesaw, the front end of the swing arm is heavy, the rear end of the swing arm is light, the front end of the swing arm is in a sagging state under a normal state, the rear end of the swing wall is in a tilting state, and the rear end of the car body of each bearing trolley is provided with a fork which is inclined upwards from back to front; the catenary and the push head on the catenary move from the rear side of the bearing trolley to the front side of the bearing trolley, and when the push head on the catenary moves from back to front and contacts with the lifting claw at the rear end of the tilting swing arm on the bearing trolley, the push head can push the bearing trolley to move forwards along with the catenary through the lifting claw; when the first group of bearing trolleys enter a storage area on a production line, a blocking rod arranged on a blocking cylinder on a walking track of the bearing trolleys is in a rising state, the blocking rod jacks the front end of a swing arm in a sagging state, the swing arm rotates clockwise, the rear end of the swing arm in a tilting state is lowered to be separated from contact with a push head, the first group of bearing trolleys losing the thrust action of the push head stop running, after the second group of bearing trolleys enter a accumulating area, an inclined fork arranged at the rear end of a trolley body of the first group of bearing trolleys moves forwards along with the second group of bearing trolleys and is inserted into the front end of the sagging swing arm arranged at the front end of the trolley body of the second group of bearing trolleys, the front end of the sagging swing arm of the second group of bearing trolleys is lifted, the swing arm on the second group of bearing trolleys also rotates clockwise, and a lifting claw at the rear end of the tilting swing arm of the second group of bearing, the push head is separated from the contact, loses power and stops; similarly, the subsequent bearing trolley groups are sequentially accumulated and released; the bearing trolley needs to run along with the catenary through the push head and also needs to realize the automatic accumulation and release functions, so that the bearing trolley in the same catenary conveying system only can run forwards in a single direction, and only in this way, two functions of running and accumulation and release of a bearing trolley group can be realized simultaneously.
In the existing power and free catenary conveyor line system, the processing and conveying of workpieces are mainly arranged along two parallel conveyor lines, an arc-shaped transition line is arranged between the two parallel conveyor lines, the two parallel conveyor lines and the two arc-shaped transition lines jointly form a closed endless conveyor line, the whole endless conveyor line runs in the same direction under the driving of a driving motor, that is, the running directions of the two conveyor lines which are parallel to each other are just opposite, workpieces suspended by a bearing trolley are mainly to be accumulated, released and processed on the two parallel conveyor lines, but the power and free catenary conveyor system arranged in a closed loop needs to occupy larger workshop space, because the front and the rear groups of bearing trolleys need larger rotating radius, when the workshop space is limited, the situation that the two arc-shaped transition lines cannot be arranged is often encountered, under the situation of the site, a design scheme of arranging a shifting machine between the two parallel lines is generally adopted, the bearing trolley group which runs to the tail end of the front side parallel conveying line does not enter the arc-shaped conveying line but is transferred to the head end of the rear side parallel conveying line through the transfer machine to directly enter the rear side straight conveying line for conveying and accumulating, but because the running directions of the two parallel conveying lines are opposite in the same catenary conveying system, when the bearing trolley group with the suspended workpiece is transferred from one parallel conveying line to the other opposite parallel conveying line, because of the swing arm structure of the existing bearing trolley, only when the pushing head rotates anticlockwise to apply force, the pushing head can be ensured to be matched with the lifting claw, the pushing head pushes the lifting claw forwards to finish the walking action, if the pushing head pushes the lifting claw in the opposite direction, the swing arm where the lifting claw is located can rotate clockwise, so that the lifting claw is lowered to be separated from the matching with the pushing head, and the trolley can not walk, therefore, the group of carrying trolleys still can run and accumulate when the group of carrying trolleys are turned around by 180 degrees to enter another conveying line which is arranged in parallel, so that a turning mechanism of the trolley group is required to be arranged on the transfer machine, the transfer machine not only needs to complete the task of transferring but also needs to complete the task of rotating, the structure of the transfer machine is complex, and the production rhythm of the conveying line is reduced.
Disclosure of Invention
The invention provides a heavy catenary conveying system with a transitional machine, which is used for preventing a bearing trolley group from turning around, and solves the technical problem of complicated structure caused by the fact that the transitional machine in the conventional heavy catenary conveying system with the transitional machine is required to be provided with a rotating table.
The invention solves the technical problems by the following technical scheme:
a heavy catenary conveying system with a transfer machine and capable of preventing a bearing trolley group from turning around comprises an outer horizontal catenary conveying line and an inner horizontal catenary conveying line which are arranged on the closed-cycle heavy catenary conveying line, wherein an outer accumulation area is arranged on the outer horizontal catenary conveying line, an inner accumulation area is arranged on the inner horizontal catenary conveying line, the transfer machine is arranged between the tail end of the outer horizontal catenary conveying line and the head end of the inner horizontal catenary conveying line, a plurality of bearing trolley groups are arranged on the heavy catenary conveying line, each bearing trolley group consists of a left bearing trolley and a right bearing trolley which are identical in structure, a bearing beam is hung between a vertical hanging plate of the left bearing trolley and a vertical hanging plate of the right bearing trolley, a hanging rod is arranged on the bearing beam, a workpiece is hung at the lower end of the hanging rod, and the left bearing trolley and the right bearing trolley are movably arranged on a bearing trolley walking track, a catenary chain walking track is arranged right above the bearing trolley walking track, a walking catenary chain is arranged on the catenary chain walking track, pushing heads are arranged on the catenary chain at intervals, and the placing direction of the right bearing trolley in the bearing trolley group is opposite to that of the left bearing trolley; the left bearing trolley body consists of an outer horizontal trolley frame plate, an inner horizontal trolley frame plate, a front trolley travelling wheel pair and a rear trolley travelling wheel pair, a vertical hanging plate is fixedly arranged on the lower bottom surface of the middle part of the trolley frame body, a swing rod hinge pin shaft is arranged between the left end of the front vertical trolley frame plate and the left end of the rear vertical trolley frame plate, the swing rod hinge pin shaft is hinged with the middle part of a swing rod, a swing rod counterweight roller is arranged at the left end of the swing rod, a swing rod lifting claw is arranged at the right end of the swing rod, a swing rod lifting limiting pin shaft is arranged between the front vertical trolley frame plate and the rear vertical trolley frame plate below the right side of the swing rod hinge pin shaft, a swing rod lifting limiting groove is arranged at the right side of the lower end of the swing rod, and an inclined fork is arranged at the left end of the front vertical; when the bearing trolley group runs on an inner horizontal catenary conveying line which is transmitted from right to left, the swing rod lifting claw on the left bearing trolley running in the front bearing trolley group is abutted with the front pushing head, and the swing rod lifting claw on the left bearing trolley running in the rear bearing trolley group is abutted with the rear pushing head; when the bearing trolley group runs on an outer horizontal catenary conveying line which is transmitted from left to right, the swing rod lifting claw on the right bearing trolley running in the front bearing trolley group is abutted with the front pushing head, and the swing rod lifting claw on the right bearing trolley running in the rear bearing trolley group is abutted with the rear pushing head; an inner accumulation area on the inner horizontal catenary conveyor line and an outer accumulation area on the outer horizontal catenary conveyor line are respectively provided with a bearing trolley group stopper, and a telescopic blocking rod is arranged on the bearing trolley group stopper; the bearing trolley group is displaced in parallel when being displaced from the outer horizontal catenary conveying line to the inner horizontal catenary conveying line through the transitional machine.
A pair of walking guide wheels is arranged on the vertical hanging plate; the pair of walking guide wheels is arranged between the two I-shaped steel guide rails of the walking track of the bearing trolley.
The utility model provides a take travelling and long-pending method of leaving free head dolly group among termination machine catenary conveying system, includes the bearing trolley that the structure is the same, and every two bearing trolleys constitute a bearing trolley group, and two bearing trolleys in every group are arranged in the opposite direction on bearing trolley walking track, are provided with multiunit bearing dolly group, its characterized in that at intervals in closed cycle catenary conveying system: when the bearing trolley group walks on a bearing trolley walking track on an inner horizontal catenary conveyor line on a closed-cycle heavy catenary conveyor line from right to left, the walking power of the front bearing trolley group is realized by the contact and matching of a front pushing head on a catenary and a swing rod lifting claw on a left bearing trolley in the front bearing trolley group; the walking power of the rear bearing trolley group is realized by the contact and the matching of a rear pushing head on the catenary chain and a swing rod lifting claw on a left bearing trolley in the rear bearing trolley group;
when the front bearing trolley group enters an inner accumulating and releasing area arranged on an inner horizontal catenary conveying line, a telescopic blocking rod arranged on a bearing trolley group stopper on the inner accumulating and releasing area extends out to lift a swing rod counterweight roller on a left bearing trolley in the front bearing trolley group, so that a swing rod rotates clockwise, a swing rod lifting claw is separated from a front pushing head, the front bearing trolley group loses power and stops, at the moment, the rear bearing trolley group still walks from right to left along with a catenary, when the swing rod counterweight roller on the left bearing trolley in the rear bearing trolley group walks and is in contact with an inclined fork on a right bearing trolley in the stopped front bearing trolley group, the swing rod counterweight roller is lifted by an inclined fork, so that the swing rod on the left bearing trolley in the rear bearing trolley group rotates clockwise, the swing rod lifting claw is separated from the rear pushing head, the rear bearing trolley group loses power and stops, the accumulation and release of two bearing trolley groups are realized;
the catenary on the outer horizontal catenary conveyor line in the closed-cycle heavy catenary conveyor line travels from left to right, the inner horizontal catenary conveyor line in the closed-cycle heavy catenary conveyor line travels from right to left, and the bearing trolley group is moved by a moving machine arranged between the tail end of the outer horizontal catenary conveyor line and the head end of the inner horizontal catenary conveyor line; the left bearing trolley and the right bearing trolley in the bearing trolley group on the bearing trolley walking track on the inner horizontal catenary conveyor line move to the inner horizontal catenary conveyor line in parallel in groups from the outer horizontal catenary conveyor line.
The bearing trolley set realizes the running and the accumulation in two directions of advancing and retreating on the catenary conveyor line, has compact structure and convenient manufacture and maintenance, saves the land area for factories, improves the land utilization rate and provides an economic and practical catenary conveyor line layout method for engineering machinery manufacturers by the accumulation method of the bidirectional bearing trolley set.
Drawings
FIG. 1 is a schematic illustration of a catenary conveyor system with a transitional machine of the present invention;
FIG. 2 is a schematic structural view of the inboard horizontal catenary conveyor line 22 of the present invention;
FIG. 3 is a schematic view of the load car group stop 24 of the present invention;
FIG. 4 is a schematic illustration of the construction of the left hand cart 14 of the cart set 28 of the present invention;
FIG. 5 is a schematic top view of the left hand cart 14 of the cart set 28 of the present invention;
FIG. 6 is a schematic structural diagram of a limiting mechanism when the swing rod on the left load-bearing trolley 14 rises;
FIG. 7 is a schematic illustration of the construction of the right hand load cart 15 of the load cart consist 28 of the present invention;
FIG. 8 is a schematic top view of the right hand cart 15 of the cart set 28 of the present invention;
fig. 9 is a schematic structural diagram of the limiting mechanism when the swing rod on the right load-bearing trolley 15 rises.
Detailed Description
The invention is described in detail below with reference to the accompanying drawings:
a heavy catenary chain conveying system with a transitional machine and capable of preventing bearing trolley groups from turning around comprises an outer horizontal catenary chain conveying line 26 and an inner horizontal catenary chain conveying line 27 on the closed-cycle heavy catenary chain conveying line, wherein an outer accumulating and releasing area is arranged on the outer horizontal catenary chain conveying line 26, an inner accumulating and releasing area is arranged on the inner horizontal catenary chain conveying line 27, a transitional machine 29 is arranged between the tail end of the outer horizontal catenary chain conveying line 26 and the head end of the inner horizontal catenary chain conveying line 27, a plurality of bearing trolley groups 28 are arranged on the heavy catenary chain conveying line, each bearing trolley group 28 is composed of a left bearing trolley 14 and a right bearing trolley 15 which are completely identical in structure, the left bearing trolley 14 is firstly placed on a bearing trolley walking track 19 on the inner horizontal catenary chain conveying line 27, and a swing rod counterweight roller 9 and an inclined fork 13 on the left bearing trolley 14 are arranged in a left direction, an L-shaped roller mounting frame is arranged at the left end of the swing rod 8, a swing rod counterweight roller 9 is mounted on the L-shaped roller mounting frame, so that the swing rod counterweight roller 9 is arranged on the left outer side of the rear side vertical frame plate 2, and the inclined fork 13 is arranged on the left outer side of the front side vertical frame plate 1; another right bearing trolley 15 with the same structure as the left bearing trolley 14 is rotated 180 degrees and then placed on a bearing trolley walking track 19 on the right side of the left bearing trolley 14, at this time, a swing rod counterweight roller 9 and an inclined fork 13 on the right bearing trolley 15 are arranged towards the right, the swing rod counterweight roller 9 is arranged on the front side, and the inclined fork 13 is arranged on the rear side; a carrier beam 16 is hung between the vertical hanging plate of the left carrier trolley 14 and the vertical hanging plate of the right carrier trolley 15, a hanging rod 17 is arranged on the carrier beam 16, a workpiece 18 is hung at the lower end of the hanging rod 17, a catenary traveling rail 20 is arranged right above a carrier trolley traveling rail 19, a traveling catenary 21 is arranged on the catenary traveling rail 20, push heads are arranged on the catenary 21 at intervals, and the placing direction of the right carrier trolley 15 in the carrier trolley group 28 is opposite to that of the left carrier trolley 14; the left bearing trolley 14 comprises an outer horizontal trolley frame plate, an inner horizontal trolley frame plate, a front trolley travelling wheel pair 3 and a rear trolley travelling wheel pair 4, wherein a vertical hanging plate 5 is fixedly arranged on the lower bottom surface of the middle part of a trolley frame body, a swing rod hinge pin 7 is arranged between the left end of the front vertical trolley frame plate 1 and the left end of the rear vertical trolley frame plate 2, the swing rod hinge pin 7 is hinged with the middle part of a swing rod 8, a swing rod counterweight idler wheel 9 is arranged at the left end of the swing rod 8, a swing rod lifting claw 10 is arranged at the right end of the swing rod 8, a swing rod lifting limiting pin 12 is arranged between the front vertical trolley frame plate 1 below the right side of the swing rod hinge pin 7 and the rear vertical trolley frame plate 2, a swing rod lifting limiting groove 11 is arranged at the right side of the lower end of the swing rod 8, and an inclined fork 13 is arranged at the left end of the front vertical trolley frame plate 1; when the bearing trolley group 28 runs on the inner horizontal catenary conveyor line 27 which is conveyed from right to left, the swing rod lifting claw 10 on the left bearing trolley 14 in the bearing trolley group 28 running at the front is abutted with the front pushing head 22, and the swing rod lifting claw 10 on the left bearing trolley 14 in the bearing trolley group 28 running at the rear is abutted with the rear pushing head 23; when the bearing trolley group 28 runs on the outer horizontal catenary conveyor line 26 which is conveyed from left to right, the swing rod lifting claw 10 on the right bearing trolley 15 in the bearing trolley group 28 running at the front is butted with the front pusher, and the swing rod lifting claw 10 on the right bearing trolley 15 in the bearing trolley group 28 running at the rear is butted with the rear pusher; an inner accumulation area on the inner horizontal catenary conveyor line 27 and an outer accumulation area on the outer horizontal catenary conveyor line 26 are respectively provided with a bearing trolley group stopper 24, and a telescopic blocking rod 25 is arranged on the bearing trolley group stopper 24; when the carrying trolley group 28 is shifted from the outer horizontal catenary conveyor line 26 to the inner horizontal catenary conveyor line 27 through the shifting machine 29, the carrying trolley group is shifted in parallel, only the shifting is needed, and the turning is not needed.
A pair of walking guide wheels 6 is arranged on the vertical hanging plate 5; the pair of walking guide wheels is arranged between the two I-shaped steel guide rails of the bearing trolley walking track 19.
A trolley group walking and accumulating method without head dropping in a catenary chain conveying system with a transfer machine comprises bearing trolleys with the same structure, wherein each two bearing trolleys form a bearing trolley group 28, the two bearing trolleys in each group are arranged in opposite directions on a bearing trolley walking track 19, and a plurality of groups of bearing trolley groups 28 are arranged in the catenary chain conveying system in a closed cycle at intervals; the invention is under the condition that the space of the workshop is limited, meet the problem that two arc-shaped transition lines can not be arranged in the catenary chain conveying system, adopt the design scheme of arranging the transfer machine between two parallel lines, make the bearing trolley group running to the end of the front side parallel conveying line not need to enter into the arc-shaped conveying line, but pass the transfer machine, transfer to the head end of the rear side parallel conveying line, enter the straight line conveying line of the rear side directly, convey and accumulate, in the same catenary chain conveying system of the invention, the running directions of the two parallel conveying lines are opposite;
when the bearing trolley group 28 walks on the bearing trolley walking track 19 on the inner horizontal catenary conveyor line 27 on the closed-cycle heavy catenary conveyor line from right to left, the walking power of the front bearing trolley group 28 is realized by the contact cooperation of the front pushing head 22 on the catenary chain 21 and the swing rod lifting claw 10 on the left bearing trolley 14 in the front bearing trolley group 28; the walking power of the rear bearing trolley group 15 is realized by the contact and the cooperation of the rear pushing head 23 on the catenary chain 21 and the swing rod lifting claw 10 on the left bearing trolley 14 in the rear bearing trolley group 28;
when the front bearing trolley group 14 enters the inner accumulation area arranged on the inner horizontal catenary chain conveyor line 27, the telescopic blocking rod 25 arranged on the bearing trolley group stopper 24 on the inner accumulation area extends out to lift the swing rod counterweight roller 9 on the left bearing trolley 14 in the front bearing trolley group 28, so that the swing rod 8 rotates clockwise, the swing rod lifting claw 10 is separated from the front pushing head 22, the front bearing trolley group 28 loses power and stops, at the moment, the rear bearing trolley group 28 still walks from right to left along with the catenary chain, when the swing rod counterweight roller 9 on the left bearing trolley 14 in the rear bearing trolley group 28 walks to touch the inclined fork 13 on the right bearing trolley 15 in the stopped front bearing trolley group 28, the swing rod counterweight roller 9 is lifted by the inclined fork 13, so that the swing rod 8 on the left bearing trolley 14 in the rear bearing trolley group 28 rotates clockwise, separating the swing rod lifting claw 10 from the rear pushing head 23, and stopping the rear bearing trolley set 28 after losing power to realize the accumulation and release of the two bearing trolley sets;
the catenary 21 on the outer horizontal catenary conveyor line 26 in the closed-cycle heavy catenary conveyor line runs from left to right, the inner horizontal catenary conveyor line 27 in the closed-cycle heavy catenary conveyor line runs from right to left, and the bearing trolley group 28 is moved by a moving machine 29 arranged between the tail end of the outer horizontal catenary conveyor line 27 and the head end of the inner horizontal catenary conveyor line 26; the left bearing trolley 14 and the right bearing trolley 15 in the bearing trolley group 28 on the bearing trolley walking track 19 on the inner horizontal catenary conveyor line 27 move to the inner horizontal catenary conveyor line 27 in groups in parallel from the outer horizontal catenary conveyor line 26;
the structure of the bearing trolley and the bearing trolley set formed by arranging the two bearing trolleys with the same structure in the opposite directions realize the walking and the accumulation of the bearing trolley set in the direction of the back of the shifting before and after the shifting, save the arrangement of a rotating mechanism on the shifting machine, and only need to translate the bearing trolley set, the walking and the accumulation can be continuously carried out, thereby simplifying the structure of the system and overcoming the defect that the production rhythm is slowed down by the rotating process.