A welding tool for yoke type frame and wear block in traction seat plate

Abstract

The application provides a welding tool for yoke type frame and wear-resistant block in traction seat plate, and belongs to the technical field of machinery. It solves the problem of difficult accurate guarantee of relative position of wear-resistant block and yoke type frame before welding. It comprises a work platform, a guide block arranged on the work platform and two positioning blocks hingedly connected to the guide block, the two positioning blocks are arranged on the left and right sides of the guide block and are connected to the guide block through guide structures respectively, the guide block can drive the upper ends of the two positioning blocks to relatively open through the two guide structures when the guide block moves, a centering block in the shape of a cylinder is fixed on the front side of the guide block, a connecting strip arranged in the left-right direction is fixed on the centering block, the connecting strip extends out of the centering block and is fixed with a positioning pin in the front-back direction, and two limiting mechanisms symmetrically arranged on the left and right sides of the guide block and capable of limiting the vertical part of the yoke type frame in the front-back direction are further arranged on the work platform. It has the advantages of good position accuracy during welding, high production efficiency and the like.

Description

TECHNICAL FIELD

[0001] The present application belongs to the mechanical technical field, and relates to a welding tool for a yoke-shaped frame and a wear-resistant block in a towing seat plate. BACKGROUND

[0002] Semitrailer trucks are increasingly widely used due to their large load capacity and high bearing capacity. The semitrailer truck includes a towing truck and a semitrailer truck connected, towed and separated through a towing seat. The towing seat is fixed on the towing truck, and the semitrailer truck is provided with a towing pin capable of being connected with the towing seat. Specifically, the towing seat is composed of a towing seat plate and a support. The towing seat plate is hinged on the support, and the support is fixed on the towing truck. As shown in Figure 10 , the towing seat plate includes a shell 24 with a V-shaped mounting port, a yoke-shaped frame 25 welded and fixed in the shell 24, and a wear-resistant block 26 welded and fixed on the yoke-shaped frame 25. The shell 24 is provided with a rotating pin frame (not shown in the figure) capable of being hinged with the support. In use, the towing pin provided on the semitrailer truck is connected to the groove of the wear-resistant block 26 through the mounting port of the shell 24, and the towing pin is limited in the groove of the wear-resistant block 26 by the locking hook (not shown in the figure) provided in the shell 24.

[0003] Specifically, in production, the wear-resistant block 26 is first welded and fixed on the yoke-shaped frame 25 to form a combined part, and then the combined part is welded and fixed on the shell 24. As shown in Figure 11 and Figure 12 , the combined part is composed of the yoke-shaped frame 25 and the wear-resistant block 26. The yoke-shaped frame 25 has a horizontal part 25a and a vertical part 25b integrally fixed on one end of the horizontal part 25a. The yoke-shaped frame 25 has a matching groove 25c extending from the vertical part 25b to the horizontal part 25a, and the end of the matching groove 25c is in a circular arc shape. The horizontal part 25a has lugs 25d on both sides of the end of the vertical part 25b. The wear-resistant block 26 is welded and fixed on the horizontal part 25a, and the distance between the groove of the wear-resistant block 26 and the vertical part 25b of the yoke-shaped frame 25 is less than the distance between the end of the matching groove 25c in the circular arc shape and the vertical part 25b of the yoke-shaped frame 25.

[0004] At present, for the welding of the yoke-shaped frame 25 and the wear-resistant block 26, the staff generally measures the position on the horizontal part 25a of the yoke-shaped frame 25 by using a ruler and marks the position by drawing a line. Then, the wear-resistant block 26 is pressed tightly and welded after being abutted on the marked position. However, this method needs to spend more time and makes the production efficiency low. Especially, in batch production, the production efficiency is obviously low if the marking is performed every time. Moreover, it is difficult to accurately ensure the relative position between the wear-resistant block 26 and the yoke-shaped frame 25 due to the manual operation.

[0005] In order to solve the problem that it is difficult to accurately ensure the relative position between the wear-resistant block 26 and the yoke-shaped frame 25, it is easy to think in the prior art that a special abutting block is arranged according to the shape of the yoke-shaped frame 25, the abutting block is positioned on the yoke-shaped frame 25 before welding, and then the wear-resistant block 26 is placed on the horizontal portion 25a of the yoke-shaped frame 25 and abuts against the abutting block to determine the position. SUMMARY

[0006] The purpose of the present application is to solve the above-mentioned problems existing in the prior art, and a welding tool for the yoke-shaped frame and the wear-resistant block in the traction seat plate is provided, which solves the problems of difficult accurate guarantee of the relative position between the wear-resistant block and the yoke-shaped frame before welding and low production efficiency.

[0007] The purpose of the present application can be achieved by the following technical solutions:

[0008] A welding tool for the yoke-shaped frame and the wear-resistant block in the traction seat plate, comprising a workbench and a pressing mechanism arranged on the workbench and capable of pressing the wear-resistant block against the yoke-shaped frame, characterized in that the workbench is provided with a guide block capable of moving up and down, the workbench is directly or indirectly hinged with two positioning blocks, the two positioning blocks are respectively located on the left and right sides of the guide block and are respectively connected with the guide block through guide structures, the movement of the guide block can drive the upper ends of the two positioning blocks to relatively open through the two guide structures, the upper side of the workbench is fixed with a centering block, the centering block is in a cylindrical shape, the centering block is located on the front side of the guide block, a connecting strip is fixed on the part of the centering block close to the guide block, the connecting strip is arranged in the left-right direction, one end of the connecting strip extends out of the centering block and is fixed with a positioning pin in the front-back direction, the front end of the positioning pin extends out of the front side of the connecting strip, the workbench is further provided with two limiting mechanisms capable of limiting the vertical portion of the yoke-shaped frame in the front-back direction, the two limiting mechanisms are symmetrically arranged on the left and right sides of the guide block and have a spacing interval between the two limiting mechanisms and the guide block.

[0009] In use, first, the yoke-shaped frame is abutted against the working platform through the horizontal part, the guide block and the top core block are located in the matching groove of the yoke-shaped frame, and the horizontal parts of the yoke-shaped frame on the left and right sides of the matching groove are respectively located between the material guiding block and the two limiting mechanisms. Then, the guide block is controlled to move in the vertical direction, so that the guide block drives the two positioning blocks to move through the two guide structures respectively, so that the upper ends of the two positioning blocks swing away from each other to form relative opening, so that the upper ends of the two positioning blocks abut against the left and right groove walls of the matching groove to correct and position the yoke-shaped frame in the left and right directions. Then, the vertical part of the yoke-shaped frame is limited in the front and back directions through the two limiting mechanisms. In this way, the relative position between the arc part in the matching groove on the yoke-shaped frame and the centering block is determined. Then, the wear-resistant block is placed on the horizontal part of the yoke-shaped frame, and the front side part of the centering block is clamped into the groove on the wear-resistant block and the front end of the positioning pin abuts against the surface where the groove opening of the wear-resistant block is located to position the wear-resistant block, and finally the wear-resistant block is pressed on the horizontal part of the yoke-shaped frame by the pressing mechanism, and then the welding work can be started.

[0010] The welding work can correct and position the yoke-shaped frame in the left and right directions through the cooperation of the guide block and the positioning block, and can correct and position the yoke-shaped frame in the front and back directions through the setting of the two limiting mechanisms, which well ensures the position of the arc part in the matching groove on the yoke-shaped frame. The centering block is located on the front side of the guide block, and after the position of the arc part in the matching groove on the yoke-shaped frame is determined, the relative position between the arc part in the matching groove and the centering block is also determined, and then after the position of the wear-resistant block is positioned by the centering block and the positioning pin, the relative position between the groove on the wear-resistant block and the arc part in the matching groove can be accurately ensured, thereby well ensuring the position accuracy of the wear-resistant block and the yoke-shaped frame during welding. In addition, through the setting of the welding tool, the operation of marking and repeatedly correcting the position on the yoke-shaped frame during production is no longer needed, time is saved and production efficiency is improved, especially for the improvement of production efficiency during batch processing.

[0011] In the above-mentioned welding tool for the yoke-shaped frame and the wear-resistant block in the traction seat plate, the position of the positioning block hinged to the working platform is at the lower end, the guide structure includes a guide groove one provided on the guide block and a guide pin one sequentially penetrating the upper end of the positioning block and the guide groove one in the front and back directions, the upper end of the guide groove one is inclinedly arranged relative to the lower end, and the distance between the guide grooves one in the two guide structures gradually increases from top to bottom.

[0012] The position of the positioning block hinged to the working platform is at the lower end, and a guide groove II is arranged on the positioning block, and a guide pin II is fixed at the upper end of the guide block, and the guide pin II passes through the guide groove II in the front and back directions, and the upper end of the guide groove II is inclined relative to the lower end, and the distance between the guide grooves II in the two guide structures gradually increases from top to bottom, so that when the guide block moves up and down, the slot walls of the two guide grooves II will generate a pushing force on the two guide pins II respectively, and the two positioning blocks are driven to swing simultaneously by the generated pushing force, so that the upper ends of the two positioning blocks can be away from each other and abut against the left and right side walls of the matching groove of the yoke-shaped frame.

[0013] Through the above arrangement, the synchronous swinging of the two positioning blocks can be realized to correct and position the yoke-shaped frame in the left and right directions.

[0014] In the above welding tool for the yoke-shaped frame and the wear-resistant block in the traction seat plate, as another technical solution, the position of the positioning block hinged to the working platform is at the lower end, and the guide structure includes a guide groove II arranged on the positioning block and a guide pin II passing through the guide block and the guide groove II in the front and back directions, and the upper end of the guide groove II is inclined relative to the lower end, and the distance between the guide grooves II in the two guide structures gradually increases from top to bottom.

[0015] The position of the positioning block hinged to the working platform is at the lower end, and a guide groove II is arranged on the positioning block, and a guide pin II is fixed at the upper end of the guide block, and the guide pin II passes through the guide groove II in the front and back directions, and the upper end of the guide groove II is inclined relative to the lower end, and the distance between the guide grooves II in the two guide structures gradually increases from top to bottom, so that when the guide block moves up and down, the slot walls of the two guide grooves II will generate a pushing force on the two guide pins II respectively, and the two positioning blocks are driven to swing simultaneously by the generated pushing force, so that the upper ends of the two positioning blocks can be away from each other and abut against the left and right side walls of the matching groove of the yoke-shaped frame.

[0016] Through the above arrangement, the synchronous swinging of the two positioning blocks can be realized to correct and position the yoke-shaped frame in the left and right directions.

[0017] In the above welding tool for the yoke-shaped frame and the wear-resistant block in the traction seat plate, the limiting mechanism includes a limiting piece positioned on the working platform and a pressing rod arranged behind the limiting piece and movable forward and backward, and the limiting piece and the pressing rod have a spacing interval, and the limiting pieces in the two limiting mechanisms are respectively located on the left and right sides of the guide block.

[0018] The limiting mechanism comprises a limiting piece positioned on the work platform and a pressing rod arranged behind the limiting piece and capable of moving forward and backward, and the limiting piece and the pressing rod have a space for giving way between them. The limiting pieces in the two limiting mechanisms are respectively positioned on the left and right sides of the guide block. In this way, after the horizontal part of the yoke-shaped frame is placed on the work platform, and the horizontal part of the yoke-shaped frame at the left and right sides of the cooperating groove is respectively positioned between the two limiting pieces and the guide block along the left and right directions, the two lugs of the horizontal part of the yoke-shaped frame are just positioned between the two limiting pieces and the pressing rod along the front and back directions. Then, the two positioning blocks are swung by the guide block and abut against the left and right groove walls of the cooperating groove to correct and position the yoke-shaped frame along the left and right directions. Then, the two pressing rods are moved forward to press against the back side of the vertical part of the yoke-shaped frame at the positions of the two lugs and push the entire yoke-shaped frame forward, until the front side of the vertical part of the yoke-shaped frame at the positions of the two lugs abuts against the back ends of the two limiting pieces, thereby correcting and positioning the yoke-shaped frame along the front and back directions.

[0019] Through the above arrangement, the welding tool can be used to correct and position the yoke-shaped frame along the left and right directions and along the front and back directions, thereby ensuring the relative position between the arc part in the cooperating groove and the centering block on the yoke-shaped frame. In this way, after the position of the wear-resistant block is positioned by the centering block and the positioning pin, the relative position between the groove on the wear-resistant block and the arc part in the cooperating groove can be accurately ensured, thereby improving the production efficiency and ensuring the position accuracy of the wear-resistant block and the yoke-shaped frame after welding.

[0020] In the above welding tool for welding the yoke-shaped frame and the wear-resistant block in the traction seat plate, the upper side of the work platform is further fixed with a mounting seat, a fixing seat and a supporting seat. The fixing seat is positioned in front of the supporting seat, and the supporting seat is positioned in front of the mounting seat. The mounting seat is fixed with a pressing cylinder, the end of the piston rod of the pressing cylinder is arranged forward, the rear end of the pressing rod is fixed with the piston rod of the pressing cylinder, the limiting piece is in the shape of an arm, the front end of the limiting piece is hinged with the fixing seat, the limiting piece can swing to abut against the top of the supporting seat about the hinge point, and when the limiting piece abuts against the supporting seat, it is arranged horizontally and the back end thereof extends out of the supporting seat. The work platform is provided with a limiting driving piece capable of driving the limiting piece to swing.

[0021] The initial state is that the limiting members are in the state of being lifted at the rear end. After the horizontal part of the yoke-shaped frame is abutted against the abutting unit and the two lugs of the horizontal part of the yoke-shaped frame are respectively located between the two limiting members and the corresponding pressing rods, the two limiting driving members are first controlled to drive the corresponding limiting members to swing and abut against the top of the corresponding support seat, so that the two limiting members are in the horizontal state, and then the corresponding pressing rods are driven by the two pressing cylinders to move forward, the two pressing rods are respectively pressed on the rear side of the vertical part of the yoke-shaped frame at the positions of the two lugs and push the entire yoke-shaped frame forward, until the front side of the vertical part of the yoke-shaped frame at the positions of the two lugs is abutted against the rear end of the two limiting members, so that the yoke-shaped frame is corrected and positioned in the front-rear direction.

[0022] After the welding is completed, the pressing rods are retreated by the pressing cylinder and the limiting members are swung to the state that the rear end thereof is lifted again by the limiting driving member. After the rear end of the limiting member is lifted, the two lugs of the horizontal part of the yoke-shaped frame are not blocked, and the yoke-shaped frame can be directly taken off from the working platform. If the rear end of the limiting member is not lifted, the rear end of the two limiting members is respectively blocked above the two lugs of the horizontal part of the yoke-shaped frame, so that the yoke-shaped frame cannot be taken off from the working platform after the welding is completed.

[0023] In the welding tool for the yoke-shaped frame and the wear-resistant block in the traction seat plate, the rear end of the limiting member is provided with a notch, and a roller is connected in the notch through a rotating shaft, and the roller partially extends out of the rear end of the limiting member.

[0024] As mentioned above, the limiting member can swing to give way to the lugs of the horizontal part of the yoke-shaped frame after the welding is completed, so that the yoke-shaped frame can be taken off from the working platform. The notch is arranged at the rear end of the limiting member, and the roller is connected in the notch through the rotating shaft, and the roller partially extends out of the rear end of the limiting member, so that the roller actually contacts the vertical part of the yoke-shaped frame, and the roller rolls on the front side of the vertical part of the yoke-shaped frame when the limiting member swings, so that the yoke-shaped frame is not scratched.

[0025] In the welding tool for the yoke-shaped frame and the wear-resistant block in the traction seat plate, the upper side of the working platform is fixed with two hinged seats, the lower ends of the two positioning blocks are respectively hinged to the two hinged seats, the upper side of the working platform is further provided with an abutting unit, the abutting unit includes a plurality of abutting blocks, the guide block and the centering block are located on the inner side of each abutting block, the upper side of the abutting block is higher than the hinged seat, and the limiting members in the two limiting mechanisms are respectively located on the left and right sides of the abutting unit.

[0026] The working platform is generally plate-shaped and generally does not have a position capable of directly hingedly connecting the positioning blocks, and therefore two hinge seats are fixed on the upper side of the working platform to provide a position for the hinging of the two positioning blocks. Since the hinge seats are arranged, the yoke-shaped frame cannot directly abut on the working platform, and therefore a plurality of abutting blocks are arranged on the upper side of the working platform to form an abutting unit, and the abutting unit is used to ensure that the yoke-shaped frame is stably abutted. The guide block and the centering block are located on the inner side of each abutting block, so that the guide block and the centering block are still located in the matching groove of the yoke-shaped frame after the yoke-shaped frame is abutted on the abutting unit, and the limiting members in the two limiting mechanisms are respectively located on the left and right sides of the abutting unit, so that the two lugs of the horizontal part of the yoke-shaped frame are still located between the limiting members and the corresponding pressing rods after the yoke-shaped frame is abutted on the abutting unit.

[0027] In the welding tool for the yoke-shaped frame and the wear-resistant block in the traction seat plate, the top surface of the part of the centering block close to the guide block is provided with a mounting groove along the left-right direction, the connecting strip is located in the mounting groove, and the positioning pin is threadedly connected with the connecting strip along the front-rear direction.

[0028] The positioning pin is threadedly connected with the connecting strip along the front-rear direction, so that the distance of the positioning pin protruding from the front side of the connecting strip can be adjusted by rotating the positioning pin according to the actual situation, and the accurate positioning of the wear-resistant block on the yoke-shaped frame is further ensured.

[0029] In the welding tool for the yoke-shaped frame and the wear-resistant block in the traction seat plate, the pressing mechanism comprises a pressing member and a pressing driving member capable of driving the pressing member to move up and down, and the bottom of the pressing member is provided with two pressing blocks arranged along the left-right direction.

[0030] The two pressing blocks are arranged along the left-right direction at the bottom of the pressing member, so that in the state that the front side of the centering block is clamped into the groove on the wear-resistant block and the front end of the positioning pin abuts against the face where the notch of the groove on the wear-resistant block is located to position the wear-resistant block, the two pressing blocks can be pressed on the two foot portions of the wear-resistant block respectively, so that the wear-resistant block can be firmly pressed on the yoke-shaped frame.

[0031] Compared with the prior art, the welding tool for the yoke-shaped frame and the wear-resistant block in the traction seat plate has the following advantages:

[0032] 1、through the cooperation of the guide block and the positioning block can be specially for the yoke type frame along the left and right deviation and positioning and through the setting of two limiting mechanism can be specially for the yoke type frame along the front and rear deviation and positioning, good guarantee the position of the arc part in the matching groove on the yoke type frame, and the centering block is located in the front side of the guide block, after the position of the arc part in the matching groove on the yoke type frame is determined, the relative position between the arc part in the matching groove and the centering block is also determined, then after the position of the wear-resistant block is positioned by the centering block and the positioning pin, the relative position of the groove on the wear-resistant block and the arc part in the matching groove can be accurately guaranteed, so as to well guarantee the position accuracy of the wear-resistant block and the yoke type frame when welding.

[0033] 2、no need to mark and repeatedly check the position on the yoke type frame during production, save time and improve production efficiency, especially for the improvement of production efficiency of batch processing. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 is a perspective view of the welding tool for the yoke type frame and the wear-resistant block in the traction seat plate.

[0035] Figure 2 is another angle perspective view of the welding tool for the yoke type frame and the wear-resistant block in the traction seat plate.

[0036] Figure 3 is a perspective view of the centering block.

[0037] Figure 4 is a top view of the welding tool for the yoke type frame and the wear-resistant block in the traction seat plate after removing the pressing mechanism.

[0038] Figure 5 is a perspective view of the welding tool for the yoke type frame and the wear-resistant block in the traction seat plate after removing the pressing mechanism and the limiting mechanism.

[0039] Figure 6 is a cooperation diagram between the guide block and the two positioning blocks.

[0040] Figure 7 is a diagram of the limiting mechanism.

[0041] Figure 8 is a perspective view of the yoke type frame and the wear-resistant block positioned on the welding tool for the yoke type frame and the wear-resistant block in the traction seat plate.

[0042] Figure 9 is Figure 8 is a local enlarged view of A in the traction seat plate.

[0043] Figure 10 is a perspective view of the traction seat plate.

[0044] Figure 11 is a perspective view of the combination of the yoke frame and the wear-resistant block.

[0045] Figure 12 is another perspective view of the combination of the yoke frame and the wear-resistant block from another angle.

[0046] In the figure, 1 is a working platform, 2 is a guide block, 2a is a guide groove, 3 is a positioning block, 3a is an abutting part, 4 is a driving cylinder, 5 is a centering block, 6 is a connecting strip, 7 is a positioning pin, 8 is a locking nut, 9 is a guide pin, 10 is a hinged seat, 11 is an abutting block, 12 is a limiting part, 13 is a pressing rod, 14 is a mounting seat, 15 is a fixed seat, 16 is a supporting seat, 17 is a pressing cylinder, 18 is a limiting driving part, 19 is a roller, 20 is a connecting seat, 21 is a swing arm, 22 is a pressing part, 22a is a pressing block, 23 is a pressing driving part, 24 is a housing, 25 is a yoke frame, 25a is a horizontal part, 25b is a vertical part, 25c is a matching groove, 25d is a lug, and 26 is a wear-resistant block. DETAILED DESCRIPTION

[0047] The following is a specific embodiment of the present application and further describes the technical solutions of the present application in combination with the drawings, but the present application is not limited to these embodiments.

[0048] Embodiment One

[0049] As Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 6As shown in the drawings, a welding tool for yoke type frame 25 and wear block 26 in traction seat plate comprises a working platform 1, the working platform 1 is provided with a guide block 2 capable of moving up and down, the working platform 1 is directly or indirectly hinged with positioning blocks 3, the two positioning blocks 3 are respectively located at the two sides of the guide block 2 and the two positioning blocks 3 are respectively connected with the guide block 2 through guide structures, the movement of the guide block 2 can drive the upper ends of the two positioning blocks 3 to relatively open through the two guide structures. In this embodiment, the bottom of the working platform 1 is fixed with a driving cylinder 4, the piston rod of the driving cylinder 4 penetrates the working platform 1 upwards, and the guide block 2 is fixed at the end of the piston rod of the driving cylinder 4. The upper side of the working platform 1 is fixed with a centering block 5, the centering block 5 is in a cylindrical shape, the centering block 5 is located at the front side of the guide block 2, the top surface of the centering block 5 is higher than the positioning blocks 3, and the part of the centering block 5 close to the guide block 2 is fixed with a connecting strip 6, the connecting strip 6 is arranged along the left-right direction, one end of the connecting strip 6 extends out of the centering block 5 and is fixed with a positioning pin 7 along the front-rear direction, and the front end of the positioning pin 7 extends out of the front side of the connecting strip 6. Among them, the top surface of the part of the centering block 5 close to the guide block 2 is provided with a mounting groove along the left-right direction, the connecting strip 6 is located in the mounting groove, the positioning pin 7 is threadedly connected with the connecting strip 6 along the front-rear direction, the rear end of the positioning pin 7 is threadedly connected with a locking nut 8, and the locking nut 8 abuts against the rear side of the connecting strip 6. The upper side of the working platform 1 is further provided with two limiting mechanisms capable of limiting the yoke type frame 25 along the front-rear direction, and the guide block 2 is located between the two limiting mechanisms along the left-right direction.

[0050] As shown in the drawings, Figure 4 , Figure 5 and Figure 6 , the hinge position of the positioning block 3 and the working platform 1 is at the lower end, the upper end side of the two positioning blocks 3 is respectively provided with an abutting part 3a, and the abutting parts 3a of the two positioning blocks 3 are arranged opposite to each other. The guide structure comprises a guide groove 2a provided on the guide block 2 and a guide pin 9 penetrating the upper end of the positioning block 3 and the guide groove 2a along the front-rear direction in sequence, the guide pin 9 is fixed with the positioning block 3, the upper end of the guide groove 2a is arranged obliquely relative to the lower end, and the distance between the two guide grooves 2a in the two guide structures gradually increases from top to bottom. Specifically, the upper side of the working platform 1 is fixed with two hinge seats 10, the lower ends of the two positioning blocks 3 are respectively hinged with the two hinge seats 10, the two hinge seats 10 are located at the left and right sides of the guide block 2, and the upper side of the working platform 1 is further provided with an abutting unit, the abutting unit comprises a plurality of abutting blocks 11, the guide block 2 is located at the inner side of each abutting block 11, and the upper side of the abutting block 11 is higher than the hinge seat 10. The limiting mechanism comprises a limiting piece 12 positioned on the working platform 1 and a top pressing rod 13 provided behind the limiting piece 12 and capable of moving forward and backward, the limiting piece 12 and the top pressing rod 13 have a spacing interval, and the limiting pieces 12 in the two limiting mechanisms are respectively located at the left and right sides of the abutting unit.

[0051] Further, as shown in the drawings, Figure 1 ,Figure 2 , Figure 4 and Figure 7 As shown, a mounting base 14 is fixed to the upper side of the working platform 1, and a top-pressure cylinder 17 is fixed on the mounting base 14. The piston rod end of the top-pressure cylinder 17 is arranged facing forward, and the rear end of the top-pressure rod 13 is fixed to the piston rod of the top-pressure cylinder 17. A fixed base 15 and a support base 16 are also fixed to the upper side of the working platform 1. The fixed base 15 is located in front of the support base 16, and the support base 16 is located in front of the mounting base 14. The limiting member 12 is arm-shaped, and the front end of the limiting member 12 is hinged to the fixed base 15. The limiting member 12 can swing around the hinge point to abut against the top of the support base 16. When the limiting member 12 abuts against the support base 16, it is horizontally arranged and its rear end extends out of the support base 16. The working platform 1 is provided with a limiting drive member 18 that can drive the limiting member 12 to swing. The rear end of the limiting member 12 is provided with a notch, and a roller 19 is connected to the notch through a rotating shaft. Part of the roller 19 extends out of the rear end of the limiting member 12. Specifically, the limiting drive component 18 is a limiting cylinder fixed to the bottom of the working platform 1. The piston rod of the limiting cylinder passes through the working platform 1. A connecting seat 20 is fixed to the end of the piston rod of the limiting cylinder. A swing arm 21 is provided between the connecting seat 20 and the limiting component 12. One end of the swing arm 21 is hinged to the piston rod of the limiting cylinder, and the other end of the swing arm 21 is hinged to the middle of the limiting component 12 along its length direction.

[0052] Furthermore, such as Figure 1 and Figure 2 As shown, this welding fixture also includes a clamping mechanism mounted on the work platform 1, which can press the wear-resistant block 26 onto the yoke frame 25. The clamping mechanism includes a clamping member 22 and a clamping drive member 23 capable of driving the clamping member 22 to move up and down. The bottom of the clamping member 22 has two clamping blocks 22a, which are arranged in the left-right direction. In this embodiment, the clamping drive member 23 is a clamping cylinder, and the clamping member 22 is fixed on the movable arm of the clamping cylinder.

[0053] In use, first, the yoke-shaped frame 25 is abutted against the abutment unit composed of each abutment block 11 through the horizontal portion 25a, ensuring that the two lugs 25d of the horizontal portion 25a of the yoke-shaped frame 25 are respectively located between the two limiting members 12 and the corresponding top pressing rods 13, and the guide block 2 and the top core block are located in the matching groove 25c of the yoke-shaped frame 25. Then, the driving cylinder 4 is controlled to work, and the guide block 2 is driven to move by the driving cylinder 4, so that the guide block 2 drives the two positioning blocks 3 to move respectively through the two guide structures, thereby causing the upper ends of the two positioning blocks 3 to swing away from each other, so that the abutment portions 3a of the upper ends of the two positioning blocks 3 abut against the left and right side walls of the matching groove 25c respectively to correct and position the yoke-shaped frame 25 in the left and right directions. Specifically, because the position at which the positioning block 3 is hinged to the working platform 1 is at the lower end thereof, on this basis, the guide slot 2a is arranged on the guide block 2, and the guide pins 9 are fixed at the upper ends of the two positioning blocks 3, and the two guide pins 9 pass through the two guide slots 2a in the front and back directions respectively. Since the guide block 2 moves up and down, the upper end of the guide slot 2a is inclined relative to the lower end, that is, the guide slot 2a is inclined, and the distance between the two guide slots 2a in the two guide structures gradually increases from top to bottom. Thus, when the guide block 2 moves up and down, the walls of the two guide slots 2a will respectively generate a pushing force on the two guide pins 9, and the two positioning blocks 3 are simultaneously driven to swing by the generated pushing force, so that the upper ends of the two positioning blocks 3 can move away from each other and abut against the left and right side walls of the matching groove 25c of the yoke-shaped frame 25 respectively. Then, the two limiting driving members 18 are controlled to drive the corresponding limiting members 12 to swing and abut against the top of the corresponding support seat 16, thereby causing the two limiting members 12 to be in a horizontal state, and then the corresponding top pressing rods 13 are driven to move forward by the two top pressing cylinders 17, and the two top pressing rods 13 abut against the rear side of the vertical portion 25b of the yoke-shaped frame 25 at the positions of the two lugs 25d and push the entire yoke-shaped frame 25 forward, until the front side of the vertical portion 25b of the yoke-shaped frame 25 at the positions of the two lugs 25d abuts against the rear end of the two limiting members 12, thereby correcting and positioning the yoke-shaped frame 25 in the front and back directions. In this way, the position of the arc portion in the matching groove 25c of the yoke-shaped frame 25 is determined, and then the wear-resistant block 26 is placed on the horizontal portion 25a of the yoke-shaped frame 25, and the front side portion of the centering block 5 is clamped into the groove on the wear-resistant block 26 and the front end of the positioning pin 7 abuts against the surface of the slot opening of the groove on the wear-resistant block 26 to position the wear-resistant block 26, and finally the wear-resistant block 26 is pressed on the horizontal portion 25a of the yoke-shaped frame 25 by the pressing mechanism, and the yoke-shaped frame 25 and the wear-resistant block 26 are positioned as shown in Figure 8 and Figure 9After the welding work is completed, the pressing mechanism returns to its original position and releases the wear-resistant block 26, and then the pressing rod 13, the limiting member 12 and the guide block 2 return to their original positions, thereby releasing the yoke-shaped frame 25, and the yoke-shaped frame 25 with the welded wear-resistant block 26 can be removed from the work platform 1.

[0054] The welding work can correct and position the yoke-shaped frame 25 in the left-right direction through the cooperation of the guide block 2 and the positioning block 3, and can correct and position the yoke-shaped frame 25 in the front-rear direction through the two limiting mechanisms, thereby ensuring the position of the arc portion in the matching groove 25c on the yoke-shaped frame 25. The centering block 5 is located in front of the guide block 2, and after the position of the arc portion in the matching groove 25c on the yoke-shaped frame 25 is determined, the relative position between the arc portion in the matching groove 25c and the centering block 5 is also determined. Then, after the position of the wear-resistant block 26 is positioned by the centering block 5 and the positioning pin 7, the relative position between the groove on the wear-resistant block 26 and the arc portion in the matching groove 25c can be accurately ensured, thereby ensuring the position accuracy of the wear-resistant block 26 and the yoke-shaped frame 25 during welding. In addition, through the setting of the welding tool, the operation of marking and repeatedly checking the position on the yoke-shaped frame 25 during production is no longer needed, thereby saving time and improving production efficiency, especially for the improvement of production efficiency during batch processing.

[0055] Embodiment Two

[0056] The structure and principle of this embodiment are basically the same as those of embodiment one, except that in this embodiment, the guide structure includes a guide groove two provided on the positioning block 3 and a guide pin two sequentially penetrating the guide block 2 and the guide groove two in the front-rear direction, the guide pin two is fixed with the guide block 2, the upper end of the guide groove two is inclined relative to the lower end, and the distance between the two guide grooves two gradually increases from top to bottom.

[0057] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art of the present application can make various modifications or supplements to the described specific embodiments or replace them with similar ways, without deviating from the spirit of the present application or exceeding the scope defined by the appended claims.

Claims

1. A welding fixture for a yoke frame and a wear-resistant block in a traction seat plate, comprising a work platform (1) and a clamping mechanism disposed on the work platform (1) and capable of pressing the wear-resistant block (26) onto the yoke frame (25), characterized in that, The working platform (1) is provided with a guiding block (2) which can move up and down, the working platform (1) is directly or indirectly hinged with two positioning blocks (3), the two positioning blocks (3) are respectively located at the left and right sides of the guiding block (2) and the two positioning blocks (3) are connected with the guiding block (2) through guiding structures respectively, the guiding block (2) can drive the upper ends of the two positioning blocks (3) to relatively open through the two guiding structures, the upper side of the working platform (1) is fixed with a centering block (5), the centering block (5) is in a cylindrical shape, the centering block (5) is located at the front side of the guiding block (2), a connecting strip (6) is fixed on the part of the centering block (5) close to the guiding block (2), the connecting strip (6) is arranged along the left-right direction, one end of the connecting strip (6) extends out of the centering block (5) and is fixed with a positioning pin (7) along the front-back direction, the front end of the positioning pin (7) extends out of the front side of the connecting strip (6), the working platform (1) is further provided with two limiting mechanisms which can limit the vertical part (25b) of the yoke-shaped frame (25) along the front-back direction, the two limiting mechanisms are symmetrically arranged at the left and right sides of the guiding block (2) and have a spacing between the two limiting mechanisms and the guiding block (2) respectively.

2. A welding fixture for welding a yoke to a wear pad in a seat plate of a tractor according to claim 1, characterized in that, The position where the positioning block (3) is hinged with the working platform (1) is at the lower end, the guiding structure comprises a guiding groove one (2a) arranged on the guiding block (2) and a guiding pin one (9) sequentially penetrating through the upper end of the positioning block (3) and the guiding groove one (2a) along the front-back direction, the upper end of the guiding groove one (2a) is arranged obliquely relative to the lower end, and the distance between the two guiding grooves one (2a) gradually increases from top to bottom.

3. A welding fixture for welding a yoke to a wear pad in a seat plate of a tractor according to claim 1, wherein, The position where the positioning block (3) is hinged with the working platform (1) is at the lower end, the guiding structure comprises a guiding groove two arranged on the positioning block (3) and a guiding pin two sequentially penetrating through the guiding block (2) and the guiding groove two along the front-back direction, the upper end of the guiding groove two is arranged obliquely relative to the lower end, and the distance between the two guiding grooves two gradually increases from top to bottom.

4. A welding tool for welding a yoke to a wear block in a seat plate of a tractor according to claim 2 or 3, characterized in that, The limiting mechanism comprises a limiting piece (12) positioned on the working platform (1) and a pressing rod (13) arranged behind the limiting piece (12) and capable of moving forward and backward, the limiting piece (12) and the pressing rod (13) have a spacing, and the limiting pieces (12) in the two limiting mechanisms are respectively located at the left and right sides of the guiding block (2).

5. A welding fixture for welding a yoke to a wear pad in a seat plate of a tractor according to claim 4, wherein, The upper side of the working platform (1) is further provided with a mounting seat (14), a fixing seat (15) and a supporting seat (16), the fixing seat (15) is located in front of the supporting seat (16), the supporting seat (16) is located in front of the mounting seat (14), the mounting seat (14) is fixed with a pressing cylinder (17), the piston rod end of the pressing cylinder (17) is arranged forwardly, the rear end of the pressing rod (13) is fixed with the piston rod of the pressing cylinder (17), the limiting piece (12) is in the shape of an arm, the front end of the limiting piece (12) is hingedly connected with the fixing seat (15), the limiting piece (12) can swing around the hinge point to abut against the top of the supporting seat (16), and when the limiting piece (12) abuts against the supporting seat (16), the limiting piece (12) is arranged horizontally and the rear end of the limiting piece (12) extends out of the supporting seat (16), and the working platform (1) is provided with a limiting driving piece (18) capable of driving the limiting piece (12) to swing.

6. A welding fixture for welding a yoke to a wear pad in a seat plate of a tractor according to claim 5, wherein, The rear end of the limiting piece (12) is provided with a notch, and a roller (19) is connected in the notch through a rotating shaft, and the roller (19) partially extends out of the rear end of the limiting piece (12).

7. A welding fixture for welding a yoke to a wear pad in a seat plate of a tractor according to claim 4, wherein, The upper side of the working platform (1) is fixed with two hinged seats (10), the lower ends of the two positioning blocks (3) are respectively hingedly connected with the two hinged seats (10), and the upper side of the working platform (1) is further provided with an abutting unit, the abutting unit comprises a plurality of abutting blocks (11), the guide block (2) and the centering block (5) are located on the inner side of each abutting block (11), the upper side of the abutting block (11) is higher than the hinged seat (10), and the limiting pieces (12) in the two limiting mechanisms are respectively located on the left and right sides of the abutting unit.

8. A welding fixture for welding a yoke to a wear pad in a seat plate of a tractor according to claim 1, wherein, The top surface of the part of the centering block (5) close to the guide block (2) is provided with a mounting groove along the left-right direction, the connecting strip (6) is located in the mounting groove, and the positioning pin (7) is threadedly connected with the connecting strip (6) along the front-rear direction.

9. A welding fixture for welding a yoke to a wear pad in a seat plate of a tractor according to claim 1, wherein, The pressing mechanism comprises a pressing piece (22) and a pressing driving piece (23) capable of driving the pressing piece (22) to move up and down, the bottom of the pressing piece (22) is provided with two pressing blocks (22a), and the two pressing blocks (22a) are arranged along the left-right direction.

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