阅读说明：本技术 摆杆输送机的进口转接辊床及应用 (Inlet switching roller bed of swing rod conveyor and application ) 是由 高先海 赵新宇 马霖 于 2020-11-13 设计创作，主要内容包括：本发明属于汽车涂装前处理/电泳生产线进口转接技术领域,公开了一种摆杆输送机的进口转接辊床及应用。包括输送辊床、主体支架、推送装置和定位装置,输送辊床、推送装置、定位装置均布置在主体支架上,主体支架固定在前处理/电泳摆杆输送机入口前的地面/钢平台上。解决滑撬输送系统与摆杆输送机在接口处无法自动转挂的问题。采用本发明所提供的的进口转接辊床,工件能在进口辊床输上自动转运至摆杆输送机的摆杆上,实现滑撬输送系统-前处理/电泳摆杆输送系统的自动化运行。(The invention belongs to the technical field of automobile coating pretreatment/electrophoresis production line inlet switching, and discloses an inlet switching roller bed of a swing rod conveyor and application thereof. The device comprises a conveying roller bed, a main body support, a pushing device and a positioning device, wherein the conveying roller bed, the pushing device and the positioning device are all arranged on the main body support, and the main body support is fixed on a ground/steel platform in front of an inlet of a pretreatment/electrophoresis swing rod conveyor. The problem that the skid conveying system and the swing rod conveyor cannot be automatically hung at an interface is solved. By adopting the inlet transfer roller bed provided by the invention, workpieces can be automatically transferred to the swing rod of the swing rod conveyor on the inlet roller bed, and the automatic operation of a skid conveying system-pretreatment/electrophoresis swing rod conveying system is realized.)

1. The inlet switching roller bed of the swing rod conveyor is characterized by comprising a conveying roller bed, a main body support, a pushing device and a positioning device, wherein the conveying roller bed, the pushing device and the positioning device are all arranged on the main body support, and the main body support is fixed on a ground/steel platform in front of an inlet of a pretreatment/electrophoresis swing rod conveyor.

2. The conveying roller bed of the swing rod conveyor as claimed in claim 1, wherein the conveying roller bed comprises a frame assembly, a driving assembly, a long roller shaft assembly, a belt edge short roller shaft assembly, a flat short roller shaft assembly, a guide wheel assembly, a roller bed switch bracket system, a long synchronous toothed belt and a short synchronous toothed belt component, wherein the driving assembly of the conveying roller bed is fixed at the tail end of the frame assembly in the running direction; the long roller shaft assembly is fixed at the tail end of the frame assembly in the running direction.

3. The conveying roller bed of the swing link conveyor as claimed in claim 2, wherein the two sides of the long roller shaft assembly are provided with first synchronizing wheels, 4 flat short roller shaft assemblies are sequentially and uniformly arranged on the left side of the running direction along the advancing direction, 4 belt edge short roller shaft assemblies are sequentially and uniformly arranged on the right side of the running direction of the roller bed along the advancing direction, the flat short roller shaft assemblies and the belt edge short roller shaft assemblies are fixed on the frame assembly (6), and the rotation axes of the corresponding flat short roller shaft assemblies and the belt edge short roller shaft assemblies are coincided.

4. The conveying roller bed of the swing rod conveyor as claimed in claim 3, wherein a second synchronizing wheel with teeth is welded on the belt edge short roller shaft assembly, and a third synchronizing wheel with teeth is welded on the flat short roller shaft assembly; the first synchronizing wheel and the second synchronizing wheel are driven by a long synchronizing toothed belt; the first synchronizing wheel and the third synchronizing wheel are respectively connected together, and the synchronizing wheel of the driving assembly and the first synchronizing wheel are connected together through a short synchronizing toothed belt; the roller bed switch bracket system is fixed on the frame assembly, the guide wheel assembly is fixed on the frame assembly, and the conveying roller bed is fixed on the main bracket.

5. The conveying roller bed of the swing link conveyor according to claim 1, wherein the main body frame comprises a main body frame, support legs, a pushing head laying device, and an adjusting shim, the main body frame is connected with the support legs, the support legs are fixed on the steel platform or on the cement ground, and the pushing head laying device and the adjusting shim are fixed on the main body frame.

6. The conveying roller bed of the swing rod conveyor as claimed in claim 1, wherein the pushing device comprises a rail, a pushing head assembly, a pushing device support, a long pin shaft, a short pin shaft, a pushing electric cylinder and a pushing device switch support system, and the rail is fixed on the main body support; the push head assembly comprises a connecting frame, a movable push head, a pushing device light-sensitive plate, a walking wheel and a guide wheel, the movable push head is hinged with the connecting frame, and the pushing opening and closing guide wheel is hinged with a hole below the movable push head; the pushing opening and closing guide wheel is contacted with the upper surface of a pushing head laying device in the main body bracket; the guide wheels are in contact with the left inner surface and the right inner surface of the track to play a role in guiding, and the walking wheels are in contact with the upper surface and the lower surface of the track to play a role in walking; the movable push head can move back and forth in the track along the running direction; the push head assembly is hinged with an extension rod of the pushing electric cylinder, and the tail end of a cylinder body of the pushing electric cylinder is hinged with the support of the pushing device; the pushing device support is fixed on the main body support; the pushing device switch support system is fixed on the track.

7. The conveying roller bed of the swing rod conveyor as claimed in claim 1, wherein the positioning device mainly comprises a first positioning device support, a positioning push head, a positioning retainer ring, a rotating shaft, a positioning device light-sensing plate, a double-elbow joint, a second positioning device support, a double-lug ring, a positioning cylinder, a positioning device switch bracket and the like; the first positioning support is hinged with the positioning push head; the head of an extending rod of the positioning cylinder is fixed with a double-elbow joint, and the double-elbow joint is hinged with the positioning pushing head; the bottom of the cylinder body of the positioning cylinder is fixed with a double-lug ring, and the double-lug ring is hinged with a second positioning device support; the first positioning device support is fixed on the main body support, the second positioning device support is fixed on the main body support, and the first positioning device support, the second positioning device support, the positioning push head and the positioning cylinder form a hinge four-bar mechanism.

8. The use of an inlet transfer roller bed of a rocker conveyor, characterized in that the inlet transfer roller bed of a rocker conveyor according to any of claims 1 to 7 is applied to the transfer of an inlet of an automotive pretreatment for painting/an electrophoretic rocker conveyor.

Technical Field

The invention relates to the technical field of automobile coating pretreatment/electrophoresis production line inlet switching, in particular to an inlet switching roller bed of a swing rod conveyor and application thereof.

Background

The description of the background of the invention pertaining to the related art to which this invention pertains is given for the purpose of illustration and understanding only of the summary of the invention and is not to be construed as an admission that the applicant is explicitly or implicitly admitted to be prior art to the date of filing this application as first filed with this invention.

With the development of the automobile industry, automobiles are gradually popularized to thousands of households, and the quality requirements of consumers on automobile products are higher and higher, wherein the corrosion resistance of the surface of an automobile body is an important factor for determining the service life of the automobile, so that the automobile is more and more emphasized. In coating production, electrophoresis is an important measure for corrosion prevention and rust prevention of a finished automobile. Electrophoresis is a process treatment mode in which a body-in-white is connected with an anode, and a coating is connected with a cathode to firmly cover the surface of the body with electrophoretic paint (commonly called primer). The electrophoresis quality of the car body greatly depends on the reliability and stability of the electrophoresis conveying equipment. At present, the swing rod conveyor is widely applied to the field of conveying pretreatment/electrophoresis in an automobile coating workshop due to the advantages of reliable structure, stable operation, good manufacturability and the like, and takes a swing rod as a carrier to convey workpieces (a white automobile body and a primer skid) to carry out procedures of degreasing, phosphorization, electrophoresis and the like. The swing rod conveying system is special in structure, if a workpiece is conveyed stably and reliably, the supporting pins of the front swing rod body and the rear swing rod body are required to enter the front bearing bush and the rear bearing bush of the primer skid respectively, and the bearing bushes are provided with guiding and locking structures, so that the workpiece cannot be separated from the swing rod body when the swing rod carries the primer skid and a vehicle body enters an electrophoresis tank or other tank bodies, and various process flows are completed smoothly. In general, a skid transport system is often used for transporting a body-in-white from a welding transfer point to a pretreatment entrance, and workpieces are transported to a predetermined position by a transport facility such as a roller bed, a turn table, or a transfer machine. The conventional skid system cannot enable the support pins of the rod body of the swing rod conveyor to timely, accurately and reliably enter the bearing bushes of the primer skid due to the fact that the conventional skid system does not have a pushing and positioning device, automatic transfer at a pretreatment/electrophoresis inlet cannot be achieved, and automatic operation of the whole conveying system is affected.

Disclosure of Invention

The embodiment of the invention aims to provide an inlet switching roller bed of a swing rod conveyor and application thereof, and solves the problem that a skid conveying system and the swing rod conveyor cannot be automatically switched and hung at an interface. By adopting the inlet transfer roller bed provided by the invention, workpieces can be automatically transferred to the swing rod of the swing rod conveyor on the inlet roller bed, and the automatic operation of a skid conveying system-pretreatment/electrophoresis swing rod conveying system is realized.

The purpose of the invention is realized by the following technical scheme:

an inlet switching roller bed of a swing rod conveyor comprises a conveying roller bed, a main body support, a pushing device and a positioning device, wherein the conveying roller bed, the pushing device and the positioning device are all arranged on the main body support, and the main body support is fixed on a ground/steel platform in front of an inlet of a pretreatment/electrophoresis swing rod conveyor.

Further, the conveying roller bed comprises a frame assembly, a driving assembly, a long roller shaft assembly, a belt edge short roller shaft assembly, a flat short roller shaft assembly, a guide wheel assembly, a roller bed switch support system, a long synchronous cog belt and a short synchronous cog belt, wherein the driving assembly of the conveying roller bed is fixed at the tail end of the frame assembly in the running direction; the long roller shaft assembly is fixed at the tail end of the frame assembly in the running direction.

Furthermore, long roller assembly both sides be provided with first synchronizing wheel, evenly arrange 4 flat short roller assembly in proper order along the advancing direction in the left side of traffic direction, evenly arrange 4 tape edge short roller assembly in proper order along the advancing direction on the right side of roller bed traffic direction, flat short roller assembly, tape edge short roller assembly are all fixed on frame assembly (6), and the rotation axis coincidence of every flat short roller assembly that corresponds and tape edge short roller assembly.

Furthermore, a second synchronizing wheel with teeth is welded on the belt edge short roller shaft assembly, and a third synchronizing wheel with teeth is welded on the flat short roller shaft assembly. The first synchronizing wheel and the second synchronizing wheel are driven by a long synchronizing toothed belt; the first synchronizing wheel and the third synchronizing wheel are respectively connected together, and the synchronizing wheel of the driving assembly and the first synchronizing wheel are connected together through a short synchronizing toothed belt. The roller bed switch bracket system is fixed on the frame assembly, the guide wheel assembly is fixed on the frame assembly, and the conveying roller bed is fixed on the main bracket.

Further, the main body support comprises a main body support frame, support legs, a pushing head laying device and an adjusting gasket, the main body support frame is connected with the support legs, the support legs are fixed on the steel platform or fixed on the cement ground, and the pushing head laying device and the adjusting gasket are fixed on the main body support frame.

Further, the pushing device comprises a rail, a pushing head assembly, a pushing device support, a long pin shaft, a short pin shaft, a pushing electric cylinder and a pushing device switch support system, wherein the rail is fixed on the main body support; the push head component comprises a connecting frame, a movable push head, a propelling device light-sensitive plate, a walking wheel and a guide wheel, wherein the movable push head is hinged with the connecting frame, and the propelling opening and closing guide wheel is hinged with a hole below the movable push head. The pushing opening and closing guide wheel is in contact with the upper surface of the pushing head laying device in the main body support. The walking wheels are arranged on the connecting frame, the guide wheels are fixed on the guide wheel brackets, the guide wheel brackets are fixed on the connecting frame, the guide wheels are in contact with the left inner surface and the right inner surface of the track to play a role in guiding, and the walking wheels are in contact with the upper surface and the lower surface of the track to play a role in walking. The movable pushing head can move back and forth in the track along the running direction. The push head assembly is hinged with an extension rod of the pushing electric cylinder, and the tail end of the cylinder body of the pushing electric cylinder is hinged with the support of the pushing device. The pusher support is fixed on the main body support. The pushing device switch support system is fixed on the track.

Furthermore, the positioning device mainly comprises a first positioning device support, a positioning pushing head, a positioning retainer ring, a rotating shaft, a positioning device light-sensing plate, a double-elbow joint, a second positioning device support, a double-lug ring, a positioning cylinder, a positioning device switch support and the like. The first positioning support is hinged with the positioning push head. The head of the extending rod of the positioning cylinder is fixed with a double-elbow joint, and the double-elbow joint is hinged with the positioning pushing head. The bottom of the cylinder body of the positioning cylinder is fixed with a double-lug ring, and the double-lug ring is hinged with a second positioning device support. The first positioning device support is fixed on the main body support, the second positioning device support is fixed on the main body support, and the first positioning device support, the second positioning device support, the positioning push head and the positioning cylinder form a hinge four-bar mechanism.

The application of the inlet switching roller bed of the swing rod conveyor is to apply the inlet switching roller bed of the swing rod conveyor to the switching of an inlet of an electrophoresis swing rod conveyor before automobile coating.

The embodiment of the invention has the following beneficial effects:

on the basis of ensuring the conveying capacity of a common roller bed, the invention is provided with the pushing device, the pushing device adopts a servo electric cylinder to reliably act, and a reasonable control program can be written by adjusting the position of the switch to ensure that the pushing device pushes the cross beam of the primer skid to reach a preset position to wait for the arrival of the swing rod before the front/rear swing rod reaches the switching position.

The positioning device is arranged, so that when the pushing device pushes the workpiece to advance rapidly, the workpiece is prevented from moving forward due to inertia, and the stop position is too far forward, so that the transfer hanging fails.

Considering the arrangement space of the pushing device and the positioning device, except that the roll shaft close to the front part of the roll bed adopts a form of 1 long roll shaft, the rest roll shafts adopt 4 pairs of 8 short roll shafts and are arranged at the left end and the right end of the running direction, power is transmitted to the long roll shaft through a tooth-shaped belt by a motor arranged at the tail end of the roll bed, and then is transmitted to the 4 pairs of short roll shafts at the left side and the right side simultaneously by the tooth-shaped belt, so that synchronous rotation is realized.

Drawings

FIG. 1 is a front view of an inlet adapter roll bed according to an embodiment of the present invention;

FIG. 2 is a top view of an inlet adapter roller bed according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the A-A side of an inlet adapter roller bed according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of the inlet adapter roller bed taken along plane B-B in accordance with an embodiment of the present invention;

FIG. 5 is a cross-sectional view of the inlet adapter roller bed taken along plane C-C of the present invention;

FIG. 6 is a front view of a conveyor roller bed provided in accordance with an embodiment of the present invention;

FIG. 7 is a top view of a conveyor roller bed according to an embodiment of the present invention;

FIG. 8 is a cross-sectional view of a B-B side of a conveyor roller bed according to an embodiment of the present invention;

FIG. 9 is a cross-sectional view of a C-C plane of a conveyor roller bed according to an embodiment of the present invention;

FIG. 10 is a view of a long roll shaft assembly provided by an embodiment of the present invention;

FIG. 11 is a front view of a pulley flange stub roller assembly and a flat stub roller assembly provided in accordance with an embodiment of the present invention;

FIG. 12 is a front view of a body support provided in accordance with an embodiment of the present invention;

FIG. 13 is a top view of a body support provided in accordance with an embodiment of the present invention;

fig. 14 is a front view of a pushing device provided in an embodiment of the present invention;

FIG. 15 is a top view of a pushing device according to an embodiment of the present invention;

FIG. 16 is an enlarged view of a region I of the pushing device provided in the embodiment of the present invention;

FIG. 17 is an enlarged view of a region II of the pushing device provided in the embodiment of the present invention;

FIG. 18 is a cross-sectional view of a pusher taken along the line A-A according to an embodiment of the present invention;

FIG. 19 is a perspective view of a pushing device B according to an embodiment of the present invention;

FIG. 20 is a front view of a pusher head assembly provided by an embodiment of the present invention;

FIG. 21 is a top view of a pusher head assembly provided in accordance with an embodiment of the present invention;

FIG. 22 is a perspective view of a pusher head assembly A according to an embodiment of the present invention;

FIG. 23 is a cross-sectional view of a pusher assembly B-B provided in accordance with an embodiment of the present invention;

FIG. 24 is a cross-sectional view of a pusher head assembly C-C provided in accordance with an embodiment of the present invention;

FIG. 25 is a cross-sectional view of a pusher assembly D-D provided in accordance with an embodiment of the present invention;

FIG. 26 is a cross-sectional view of a pusher head assembly E-E provided in accordance with an embodiment of the present invention;

FIG. 27 is a front view of a positioning device provided in accordance with an embodiment of the present invention;

FIG. 28 is a left side view of a positioning device provided in accordance with an embodiment of the present invention;

FIG. 29 is a cross-sectional view of a positioning device A-A provided in accordance with an embodiment of the present invention;

FIG. 30 is a cross-sectional view of a positioning device B-B provided in accordance with an embodiment of the present invention;

FIG. 31 is a perspective view of a positioning device C provided in accordance with an embodiment of the present invention;

FIG. 32 is a front view of a workpiece (primer skid + body) provided by an embodiment of the present invention;

FIG. 33 is a schematic diagram of an entry transfer state 1 according to an embodiment of the present invention;

FIG. 34 is a schematic diagram of an ingress hung state 2 according to an embodiment of the present invention;

FIG. 35 is a schematic diagram of an ingress hung state 3 according to an embodiment of the present invention;

FIG. 36 is a schematic diagram of an entry transfer state 4 according to an embodiment of the present invention;

FIG. 37 is a diagram illustrating an ingress hung state 5 according to an embodiment of the present invention;

fig. 38 is a schematic diagram of an entry transfer state 6 according to an embodiment of the present invention.

Detailed Description

The present application is further described below with reference to examples.

In the following description, different "one embodiment" or "an embodiment" may not necessarily refer to the same embodiment, in order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art. Various embodiments may be replaced or combined, and other embodiments may be obtained according to the embodiments without creative efforts for those skilled in the art.

An inlet transfer roller bed of a swing rod conveyor is shown in figures 1-5 and mainly comprises a conveying roller bed 1, a main body support 2, a pushing device 3, a positioning device 4 and the like. The conveying roller bed 1, the pushing device 3 and the positioning device 4 are all arranged on the main body support 2, the main body support 2 is provided with support legs 26, and as shown in figure 12, the whole inlet switching roller bed is fixed on a ground/steel platform in front of an inlet of the pretreatment/electrophoresis swing rod conveyor through the support legs 26.

The structure of the conveying roller bed 1 is similar to that of the upper half part of a common roller bed, and as shown in fig. 6 and 7, the conveying roller bed 1 mainly comprises a frame assembly 6, a driving assembly 7, a long roller shaft assembly 8, a belt edge short roller shaft assembly 9, a flat short roller shaft assembly 10, a guide wheel assembly 11, a roller bed switch support system 12, a long synchronous toothed belt 13, a short synchronous toothed belt 14 and the like. The structure of the roller bed is different from that of a common conveying roller bed in that a conventional roller bed driving assembly is close to the middle of the roller bed, then a certain number of long roller shafts are sequentially and uniformly arranged along the running direction, a motor of the driving assembly is connected with a synchronizing wheel with teeth in a key connection mode, the synchronizing wheel with teeth is welded on one side of each long roller shaft, and the synchronizing wheel with teeth on the driving assembly is connected with the synchronizing wheel with long roller shafts, the synchronizing wheel with long roller shafts and other synchronizing wheels with long roller shafts through synchronous toothed belts, so that the synchronous running of the roller shafts can be guaranteed. The inlet switching roller bed provided by the invention needs to provide position space for the pushing device and the positioning device, so that a roller shaft arrangement form of a conventional roller bed is not adopted. Instead, as shown in fig. 9, the driving assembly 7 is fixed to the end of the frame assembly 6 in the running direction by a number 1M 10 screw group 15; the long roller shaft assembly 8 is fixed on the tail end of the running direction of the frame assembly 6 through a No. 2M 10 screw group 16. As shown in fig. 10, first synchronizing wheels 17 with gears are welded to both sides of the long roll shaft assembly 8. As shown in fig. 7, 4 flat short roller shaft assemblies 10 are uniformly arranged in sequence along the advancing direction on the left side of the running direction, and 4 flanged short roller shaft assemblies 9 are uniformly arranged in sequence along the advancing direction on the right side of the running direction of the roller bed. As shown in fig. 8, the short flat roller shaft assembly 9 and the short belt edge roller shaft assembly 10 are fixed on the frame assembly 6 by a number 3M 10 screw group 18, and each corresponding short flat roller shaft assembly 10 is coincident with the rotation axis of the short belt edge roller shaft assembly 9. As shown in fig. 11, a second synchronizing wheel 19 with teeth is welded on the belt edge stub roller shaft assembly 9, and a third synchronizing wheel 20 with teeth is welded on the flat stub roller shaft assembly 10. As shown in fig. 7, the first synchronizing wheel 17, the second synchronizing wheel 19; the first synchronizing wheel 17 and the third synchronizing wheel 20 are respectively connected together, and the synchronizing wheel 21 of the driving assembly 7 and the first synchronizing wheel 17 are connected together through the short synchronizing cog belt 14. The conveying roller bed can play the same conveying function as a common roller bed, and meanwhile, short roller shafts arranged on two sides provide arrangement space for the pushing device 3 and the positioning device 4. As shown in fig. 6-8, the roller bed switch bracket system 12 is fixed to the frame assembly 6 by a number 1M 8 screw set 22, and the guide wheel assembly 11 is fixed to the frame assembly by a number 2M 8 screw set 23. The whole device of the conveying roller bed is fixed on the main body bracket 2 through a No. 4M 10 screw group 24. When the motor of the driving assembly 7 is started, power is transmitted from a synchronous wheel 21 of the motor to a first synchronous wheel 17 of the long roll shaft through the short synchronous cog belt 14 and then transmitted to a second synchronous wheel 19 of the short roll shaft through the long synchronous cog belt 13, so that synchronous operation of all roll shafts is realized, and the conveying of the primer skid and the white car body of the workpiece is completed.

The main body frame 2 is similar to a supporting leg of a common roller bed in function, mainly plays a supporting role, and is provided with a main body frame 25 with an arrangement space in the middle in consideration of functions of arranging a track of a pushing device, arranging a positioning device, supporting a conveying device on the upper part and the like. As shown in fig. 12 to 13, the main body frame 2 includes a main body frame 25, a leg 26, a pusher head falling device 27, and an adjustment shim 28. The main body frame 25 of the present invention is connected to 4 legs 26 by means of bolts, and the legs 26 may be welded to a steel platform or fixed to a concrete floor by means of expansion bolts. The invention considers that the push head component 31 of the pushing device 3 does not interfere with the beam 5 of the primer skid when returning, a push head laying device 27 is arranged, and the push head laying device 27 and the adjusting gasket 28 are fixed on the main body bracket frame 25 through a No. 1M 8 bolt group 29. When the electric pushing cylinder 35 of the pushing device 3 extends/retracts, the movable pushing head 39 of the pushing head assembly 31 can achieve the lifting/lowering state by utilizing the slope on the pushing head falling device 27 and the self-gravity of the pushing head assembly.

As shown in fig. 14, the pushing device 3 mainly includes a rail 30, a pushing head assembly 31, a pushing device support 32, a long pin 33, a short pin 34, a pushing electric cylinder 35, a pushing device switch support system 36, and the like. As shown in fig. 18-19, the rail 30 is secured to the body bracket 2 by a number 1M 10 bolt set 37. As shown in fig. 20 to 21, the pusher head assembly 31 mainly includes a coupling frame 38, a movable pusher head 39, a pusher photosensitive plate 40, a traveling wheel 41, a guide wheel 42, and the like. As shown in fig. 25, the movable pushing head 39 and the connecting frame 38 are hinged together by a first pin 43, a first retainer ring 44 and a first sliding bearing 45. As shown in fig. 26, the pushing opening and closing guide wheel 46 is hinged with a hole below the movable pushing head 39 through a second pin 47, a second stop ring 48 and a first spacing ring 49. The push opening and closing guide wheel 46 is in contact with the upper surface of the pusher lying device 27 in the main body frame 2. As shown in fig. 23, the road wheel 41 is mounted on the coupling frame 38 via a road wheel shaft 50, a third retaining ring 51, a fourth retaining ring 52, and a first rolling bearing 53. As shown in fig. 24 and 20, the guide wheel 42 is fixed to the guide wheel bracket 57 by the guide wheel shaft 54, the second spacer ring 55 and the fifth retainer ring 56, the guide wheel bracket 57 is fixed to the coupling frame 38 by the No. 3M 8 screw group 58, and the guide wheel 42 is in contact with the left and right inner surfaces of the rail 30 to perform a guiding function. As shown in fig. 22-23, the road wheels 41 are in contact with the upper and lower surfaces of the rail 30 to play a role in walking. The movable pusher 39 can move back and forth in the track in the direction of travel. As shown in fig. 15 and 17, the pushing head assembly 31 is hinged with the extending rod of the electric pushing cylinder 35 through a short pin shaft 34 and a first small pin 59, and as shown in fig. 15 and 16, the end of the cylinder body of the electric pushing cylinder 35 is hinged with the pushing device support 32 through a long pin shaft 33 and a second small pin 60. As shown in fig. 14, the pusher holder 32 is fixed to the main body frame 2 by a bolt set 61 No. 1M 16. The pusher switch bracket system 36 is fixed to the rail by welding.

The main function of the positioning device 4 is to cooperate with the pushing device 3 to clamp the primer skid beam 5 and accurately position the workpiece, as shown in fig. 33, so that the swing link body 82 can be smoothly hung in the primer skid bush 81. Prevent that the work piece from dashing out because of the inertia of carrying roller bed 1 and predetermineeing and grabbing the position of hanging, positioner 4 can open after the completion of changeing hanging simultaneously, avoids pendulum rod area work piece to move forward positioner 4 and priming paint skid crossbeam 5 to interfere. As shown in fig. 27 to 28, the positioning device 4 mainly includes a first positioning device support 62, a positioning pusher 63, a positioning retainer 64, a rotating shaft 65, a positioning device light-sensing plate 66, a double-elbow joint 67, a second positioning device support 68, a double-lug ring 69, a positioning cylinder 70, a positioning device switch bracket 71, and the like. As shown in fig. 29, the first positioning support 62 and the positioning push head 63 are hinged together through a positioning retainer ring 64, a rotating shaft 65 and a second sliding bearing 72. As shown in fig. 27 and 30, the head of the extending rod of the positioning cylinder 70 is fixed with the double-elbow joint 67 in a threaded fit manner, and the double-elbow joint 67 is hinged with the positioning push head 63 through a third pin 73, a third small pin 74 and a third sliding bearing 75. As shown in fig. 27 and 31, the bottom of the positioning cylinder 70 is fixed to the double lug ring 69 by means of screw thread fit, and the double lug ring 69 is hinged to the second positioning device support 68 by means of a fourth pin shaft 76, a fourth small pin 77 and a fourth sliding bearing 78. As shown in fig. 27, the first positioner bracket 62 is fixed to the main body frame 2 by a number 2M 16 bolt group 79, and the second positioner bracket 68 is fixed to the main body frame 2 by a number 1M 12 bolt group 80, and by the above connection, the four components of the first positioner bracket 62, the second positioner bracket 68, the positioning push head 63, and the positioning cylinder 70 form a four-bar hinge mechanism.

Fig. 33-38 show a schematic diagram of a pretreatment entrance transition, which is realized by the following technical actions of an entrance transition roller bed, that is, firstly, a workpiece is conveyed to the entrance transition roller bed by a skid conveying system, the conveying roller bed 1 conveys the workpiece to a position to be started as shown in fig. 33, after a swing rod reaches a preset position, a switching system sends a signal to give a command, so that the conveying roller bed 1 conveys the workpiece forwards, when the workpiece reaches the position 1, a roller bed switching bracket system 12 gives a command, so that a positioning cylinder 70 of a positioning device 4 starts to extend, a positioning push head 63 stands, and when the positioning push head 63 is in place, a positioning device switching bracket assembly 71 sends a positioning position signal, so that the positioning cylinder 70 stops operating. At the same time, the pushing electric cylinder 35 of the pushing device 3 starts to push forwards, and the pushing head assembly 31 moves forwards in the running direction in the track 30. The pushing opening and closing guide wheel 46 of the pushing head assembly 31 is in contact with the slope of the pushing head falling device 27, and the forward moving slope is downward, so that the upper part of the movable pushing head 39 of the pushing head assembly 31 is lifted and simultaneously moves like the forward movement of the running direction, the primer skid front beam 5 is pushed to enable the workpiece to reach the position 2, the pushing device switch support system 36 sends a pushing in-place signal, and the pushing electric cylinder 35 stops acting. When both push-in-place and locate-in-place signals are transmitted, as shown in fig. 34. Next, the swing rod continues to move, the front bearing bush 81 of the primer skid has a locking function to prevent the workpiece from falling, and after the front swing rod body 82 finishes the action of hanging in the front bearing bush 81 of the primer skid, the front swing rod body 82 finishes smooth hanging, as shown in fig. 35. At the moment, a command is given by sending a signal through the swing rod switch system. The positioning cylinder 70 starts to retract, the positioning pushing head 63 descends, and after the positioning pushing head descends to the proper position, the positioning device switch bracket assembly 71 sends out a positioning return signal, so that the positioning cylinder 70 stops acting. And when the positioning push head 63 is lowered to the position, the maximum height of the positioning push head 63 is lower than the minimum height of the primer skid beam 5, so that interference is prevented. After the rocker is signaled, the pushing electric cylinder 35 of the pushing device 3 starts to retract at the same time, and the pushing head assembly 31 moves backwards in the track 30 along the running direction. When the pushing head assembly 31 returns to the initial position, the pushing device switch bracket system 36 sends a pushing return signal, and the pushing electric cylinder 35 stops acting. And the highest height of the movable push head 39 after falling is lower than the lowest height of the primer skid beam 5, so that interference is prevented. When both the positioning return signal and the pushing return signal are sent, the conveying roller bed 1 continues to advance as shown in fig. 36, and then starts to swing the rear swing link similarly to the aforementioned swing link hanging process. When the conveying roller bed 1 conveys the workpiece to move forwards and the workpiece reaches the position 2, a command is given through the roller bed switch bracket system 12, the positioning cylinder 70 of the positioning device 4 starts to extend out, the positioning push head 63 stands up, and when the positioning push head 63 is in place, the positioning device switch bracket assembly 71 sends out a positioning and locating signal to stop the positioning cylinder 70. At the same time, the pushing electric cylinder 35 of the pushing device 3 starts to push forwards, and the pushing head assembly 31 moves forwards in the running direction in the track 30. The pushing opening and closing guide wheel 46 of the pushing head assembly 31 is in contact with the slope of the pushing head falling device 27, and the forward moving slope is downward, so that the upper part of the movable pushing head 39 of the pushing head assembly 31 is lifted and simultaneously moves like the forward movement of the running direction, the primer skid rear cross beam 83 is pushed to enable the workpiece to reach the position 2, the pushing device switch support system 36 sends a pushing in-place signal, and the pushing electric cylinder 35 stops acting. When both push-in-place and locate-in-place signals are transmitted, as shown in fig. 37. Next, the swing rod continues to move, the bearing bush 84 has a locking function after the primer skid prevents the workpiece from falling, and after the rear swing rod body 85 finishes the action of hanging the primer skid and the front bearing bush 84, the rear swing rod body 85 finishes smooth hanging, as shown in fig. 38. At the moment, a command is given by sending a signal through the swing rod switch system. The positioning cylinder 70 starts to retract, the positioning pushing head 63 descends, and after the positioning pushing head descends to the proper position, the positioning device switch bracket assembly 71 sends out a positioning return signal, so that the positioning cylinder 70 stops acting. And when the positioning push head 63 is lowered to the position, the maximum height of the positioning push head 63 is lower than the minimum height of the rear cross beam 81 of the primer skid, so that interference is prevented. After the rocker is signaled, the pushing electric cylinder 35 of the pushing device 3 starts to retract at the same time, and the pushing head assembly 31 moves backwards in the track 30 along the running direction. When the pushing head assembly 31 returns to the initial position, the pushing device switch bracket system 36 sends a pushing return signal, and the pushing electric cylinder 35 stops acting. And the highest height of the movable push head 39 after falling is lower than the lowest height of the rear cross beam 84 of the primer skid, so that interference is prevented. At the moment, the workpiece is completely transferred to the swing rod conveyor by the inlet transfer roller bed, the transfer is completed, the inlet transfer roller bed is restored to the initial state, the next transfer can be performed, and the automatic conveying action of the pretreatment inlet can be realized by repeating the actions.

It should be noted that the above embodiments can be freely combined as necessary. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.