A welding fixture for a tow hitch frame

Abstract

The utility model provides a kind of welding tool of traction seat frame, belong to welding tool technical field.It solves the problem such as inconvenient welding of existing traction seat frame.The welding tool of this traction seat frame, including gantry and the support below gantry, positioning assembly for positioning frame is provided on gantry, first motor is fixedly connected on support, driving gear is fixedly connected on the shaft of first motor, bearing is provided between gantry and support, the inner ring of bearing is fixedly connected on support, the outer ring of bearing is fixedly connected in the middle of gantry bottom surface, the outer ring of bearing is provided with driven gear meshing with driving gear.This welding tool makes traction seat frame convenient to weld.

Description

Technical Field

[0001] This utility model belongs to the field of welding fixture technology, and relates to a welding fixture for a traction seat frame. Background Technology

[0002] The towing seat is a connecting component of a cargo tractor used to tow and support a semi-trailer. It is connected to the towing pin through a locking mechanism and is responsible for transmitting traction force, supporting the front load of the semi-trailer, and realizing steering function.

[0003] A towing seat includes a towing seat plate welded assembly, a support, a locking pin, a pin block, a safety lock, and a handle operating assembly, such as a semi-trailer towing seat with announcement number CN205971557U. The towing seat plate welded assembly mainly includes a housing and a frame. The frame includes a front crossbeam, a rear crossbeam, a yoke frame, and two pivot pins for connection to the support. The yoke frame and the two pivot pins are located between the front and rear crossbeams. The yoke frame is fixed in the middle of the front and rear crossbeams, and the two pivot pins are located at both ends of the front and rear crossbeams. The frame is roughly symmetrically arranged front and back. During welding, the front crossbeam, rear crossbeam, yoke frame, and two pivot pins are first welded to form the frame, and then the frame is welded and fixed to the housing.

[0004] Welding fixtures are required for positioning during frame welding. For example, a traction seat frame assembly welding positioning device (publication number CN109531020A) disclosed in Chinese patent literature includes a traction seat frame assembly limiting platform and a traction seat frame assembly positioning device. The limiting platform includes a platform frame and frame assembly limiting devices mounted on it to limit the installation positions of each traction seat frame assembly. The limiting devices include front and rear frame limiting structures, left inner and outer ear limiting structures, and right inner and outer ear limiting structures. The positioning device includes an upper positioning mechanism, a left positioning mechanism, and a right positioning mechanism. During welding, the various components of the frame are fixed to the limiting platform frame, and then the connection positions of each component are welded manually. Since the frame is roughly symmetrically arranged front and back, welding is required at both ends. Workers typically need to move from the front to the rear of the workpiece during welding. During this transfer, the welding machine position often needs to be adjusted for on / off operation and parameter adjustment. Sometimes, welding torch collisions may occur during the transfer, leading to welding inconvenience. Utility Model Content

[0005] The purpose of this utility model is to address the aforementioned problems in the existing technology by proposing a welding fixture for a traction seat frame, thereby solving the technical problem of how to facilitate frame welding.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A welding fixture for a traction seat frame includes a platform with a positioning component for positioning the frame. The fixture further includes a support located below the platform, on which a first motor is fixedly connected. A drive gear is fixedly connected to the shaft of the first motor. A bearing is disposed between the platform and the support, with the inner ring of the bearing fixedly connected to the support and the outer ring fixedly connected to the center of the bottom surface of the platform. The outer ring of the bearing is provided with a driven gear that meshes with the drive gear.

[0008] During welding, the various components of the frame are positioned on the workbench using positioning components. The worker stands at the front of the workbench and can begin welding the front portion of the frame. Then, the first motor rotates, driving the outer ring of the bearing to rotate through the meshing of the drive and driven gears, thus reversing the front and back of the workbench. After the reversal is complete, the first motor stops, and the worker can then weld the rear portion of the frame. This allows the worker to weld the rear of the frame without having to move to the back of the workbench, making welding more convenient. Furthermore, the workbench can not only be reversed but also rotated to any angle, allowing for angle adjustments to address positions where welding from the front is inconvenient, thereby facilitating the welding process.

[0009] In the welding fixture for the aforementioned traction seat frame, the frame includes a base plate and a platform plate arranged in parallel. The platform plate is located above the base plate, and the outer ring of the bearing is fixedly connected to the bottom surface of the base plate. Several support columns connect the platform plate and the base plate. The positioning assembly includes several clamping cylinders hinged to the base plate. Clamping claws are hinged to the platform plate, with the upper end of each clamping claw passing upward through the platform plate, and the lower end of each clamping claw hinged to the piston rod of a clamping cylinder. When the clamping cylinders are activated, they can drive the clamping claws to swing, causing the clamping claws to move closer to or away from the frame. When the clamping claws approach and abut against the frame, they can provide front-to-back positioning for the frame.

[0010] In the welding fixture for the aforementioned traction seat frame, multiple clamping blocks are also fixed on the upper surface of the platform. The number of clamping blocks is less than the number of clamping claws, and the clamping blocks are correspondingly arranged with some of the clamping claws. The clamping blocks and clamping claws can form a clamping action, making the frame fixed and stable on the platform.

[0011] In the welding fixture of the aforementioned traction seat frame, pin cylinders are fixed at both ends of the base plate. The piston rod of the pin cylinder is parallel to the base plate. A connecting plate is fixedly connected to the piston rod of the pin cylinder. A pin parallel to the piston rod of the pin cylinder is fixed on the connecting plate. The two pins are arranged opposite each other and located above the platform.

[0012] Two pins are positioned at opposite ends of the frame, each end of which has a pivot bracket. When the pin cylinder is activated, it drives the pins to move left and right, causing them to move closer to or away from the frame. When the pins are close to the frame, they may insert into the pin holes of the pivot brackets, thus limiting the upper and lower and front and rear movement of the pivot brackets.

[0013] In the welding fixture for the aforementioned traction seat frame, sockets are fixed at both ends of the platform, and the pins pass through the sockets. The sockets support the pins, ensuring stable operation.

[0014] In the welding fixture for the aforementioned traction seat frame, a stop cylinder is fixed to the upper surface of each socket. The piston rod of the stop cylinder is parallel to the platform, and the piston rods of the two stop cylinders are arranged opposite each other and each is fixed with a pressure plate. When the stop cylinder is activated, it drives the pressure plate to move left and right, so that the pressure plate moves closer to or away from the frame. When the two pressure plates are relatively close, they can form a left and right positioning for the frame.

[0015] In the welding fixture of the aforementioned traction seat frame, the positioning assembly further includes two swing arm cylinders fixedly connected to the platform. Positioning seats are fixedly connected to the swing arms of the swing arm cylinders. The positioning seats are located above the platform, and the two positioning seats are arranged in a one-to-one correspondence with the two pressure plates.

[0016] When the swing arm cylinder actuates, it drives the positioning seat to swing up and down, moving the positioning seat closer to or away from the platform. Each end of the frame has a pivot pin; when the positioning seat swings downwards, it inserts into the pivot pin to position it. The pivot pin can be clamped and fixed in place by the pressure plate and the positioning seat. The swing arm cylinder is mounted on the platform and rotates with it when the platform rotates, facilitating welding.

[0017] In the aforementioned welding fixture for the traction seat frame, the welding fixture further includes two supports, with the bracket located between the two supports. A swing seat is fixed to both ends of the bracket, and a swing shaft is fixed to each swing seat. The swing shaft passes through the corresponding support, and a second motor is fixed to one of the supports. One of the swing shafts is connected to the rotating shaft of the second motor. The swing shaft and the rotating shaft of the second motor can be connected by a belt drive assembly, a chain drive assembly, or a gear drive assembly. When the second motor is working, it can drive the swing shaft to rotate, thereby causing the bracket to swing up and down. This allows the vertical welding position to be adjusted to a horizontal welding position, facilitating welding.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] A bearing is installed between the support and the platform. The inner ring of the bearing is fixed to the support, and the outer ring is fixed to the platform. A driven gear is also installed on the outer ring of the bearing. A first motor is fixed on the support, and the driving gear on the first motor meshes with the driven gear. In this way, the platform is rotated by the first motor to achieve front-to-back rotation. This not only eliminates the need for workers to move to the back of the platform for welding, but also allows for angle adjustment of inconvenient welding positions, making welding easier. The support is hinged to the base and can swing up and down, allowing the vertical welding position to be adjusted to a horizontal welding position, making welding easier. Attached Figure Description

[0020] Figure 1 This is a 3D view of the frame being installed on this welding fixture.

[0021] Figure 2 This is a partial 3D view of the platform when the frame is installed on this welding fixture.

[0022] Figure 3 This is a partial 3D view of the platform from another perspective when the frame is installed on this welding fixture.

[0023] Figure 4 This is a 3D view of the middle part of the support in this welding fixture.

[0024] Figure 5 This is a partial sectional view of the welding fixture.

[0025] In the diagram, 1. Frame; 1a. Base plate; 1b. Platform; 1c. Support column; 2. Bracket; 3. Swing seat; 4. Swing shaft; 5. First motor; 6. Second motor; 7. Clamping cylinder; 8. Clamping claw; 9. Clamping block; 10. Pin cylinder; 11. Connecting plate; 12. Pin; 13. Socket; 14. Abutting cylinder; 15. Pressure plate; 16. Abutting seat; 17. Swing arm cylinder; 18. Positioning seat; 19. Drive gear; 20. Bearing; 21. Driven gear; 22. Frame; 23. Support. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] like Figure 1 and Figure 2As shown, a welding fixture for a traction seat frame includes a platform 1 and a support 2 located below the platform 1. The platform 1 is equipped with a positioning assembly for positioning the frame 22. The platform 1 includes a base plate 1a and a platform plate 1b arranged in parallel, with the platform plate 1b located above the base plate 1a. Several support columns 1c connect the platform plate 1b and the base plate 1a. The various components of the frame 22 are placed and fixed on the upper surface of the platform plate 1b. The welding fixture for the traction seat frame 22 also includes two supports 23 located on the left and right sides respectively. The support 2 is located between the two supports 23. Swing seats 3 are fixed at both ends of the support 2. Swing shafts 4 are fixed on the swing seats 3 and pass through the corresponding supports 23. A second motor 6 is fixed on one of the supports 23, and one swing shaft 4 is connected to the rotating shaft of the second motor 6. The swing shaft 4 is connected to the rotating shaft via a belt drive assembly or a chain drive assembly.

[0028] like Figure 2 and Figure 3 As shown, the positioning assembly includes several clamping cylinders 7 hinged to the base plate 1a, and clamping claws 8 hinged to the platform 1b. The upper end of the clamping claw 8 passes upward through the platform 1b, and the lower end of the clamping claw 8 is hinged to the piston rod of the clamping cylinders 7. A hinge block is fixedly connected to the lower surface of the platform 1b, and the middle part of the clamping claw 8 is hinged to the hinge block. When the clamping cylinders 7 are activated, they can drive the clamping claw 8 to swing back and forth, causing the clamping claw 8 to move closer to or away from the frame 22. When the clamping claw 8 approaches and abuts against the frame 22, it can provide back-and-forth positioning for the frame 22. Several clamping blocks 9 are also fixed to the upper surface of the platform 1b. The number of clamping blocks 9 is less than the number of clamping claws 8, and the clamping blocks 9 are correspondingly arranged with some of the clamping claws 8. After the clamping claw 8 corresponding to the clamping block 9 swings, the clamping claw 8 can clamp the frame 22 with the clamping block 9.

[0029] like Figure 2 and Figure 3As shown, pin cylinders 10 are fixed at both ends of the base plate 1a. The piston rod of the pin cylinder 10 is parallel to the base plate 1a. A connecting plate 11 is fixedly connected to the piston rod of the pin cylinder 10. Pins 12, parallel to the piston rod of the pin cylinder 10, are fixed on the connecting plate 11. The two pins 12 are positioned opposite each other and above the platform 1b. The two pins 12 are positioned at both ends of the frame 22, and each end of the frame 22 has a pivot pin holder. When the pin cylinder 10 is activated, it drives the pins 12 to move left and right, causing the pins 12 to move closer to or away from the frame 22. When the pins 12 are close to the frame 22, they may be inserted into the pin holes of the pivot pin holders, forming upper and lower limits and front and rear limits for the pivot pin holders. A guide rail is also fixed on the connecting plate 11. A slider is fixed on the lower surface of the platform 1b, and the guide rail passes through the slider to provide guidance and positioning. Sockets 13 are fixed at both ends of the platform 1b, and the pins 12 pass through the sockets 13. A stop cylinder 14 is fixed on the upper surface of the socket 13. The piston rod of the stop cylinder 14 is arranged parallel to the platform 1b. The piston rods of the two stop cylinders 14 are arranged opposite each other and each is fixed with a pressure plate 15. A stop seat 16 corresponding to one of the pressure plates 15 is also fixed on the platform 1b. The pressure plate 15 and the stop seat 16 fix one of the pivot brackets to the left and right.

[0030] like Figure 2 and Figure 3 As shown, the positioning assembly also includes two swing arm cylinders 17 fixedly connected to the platform 1b. Positioning seats 18 are fixedly connected to the swing arms of the swing arm cylinders 17, located above the platform 1b. The two positioning seats 18 are positioned at opposite ends of the frame 22. The positioning seats 18 can move downwards and insert into the pivot frame, positioning the pivot frame. Simultaneously, the positioning seats 18 and the pressure plate 15 clamp and fix one side wall of the pivot frame, controlling the distance between the two pivot frames. Additionally, a positioning head is fixed on the platform 1b to prevent the positioning seats 18 from swaying. A positioning groove is provided at the connection between the positioning seat 18 and the swing arm of the swing arm cylinder 17. The positioning head can be inserted into the positioning groove to prevent the positioning seat 18 from swaying, ensuring that the distance between the two pivot frames is the designed distance.

[0031] like Figure 3 , Figure 4 and Figure 5 As shown, a first motor 5 is fixedly connected to the bracket 2, and a drive gear 19 is fixedly connected to the shaft of the first motor 5. A bearing 20 is provided between the platform 1 and the bracket 2. The inner ring of the bearing 20 is fixedly connected to the middle of the bracket 2, and the outer ring of the bearing 20 is fixedly connected to the middle of the bottom surface of the base plate 1a. The outer ring of the bearing 20 is provided with a driven gear 21 that meshes with the drive gear 19.

[0032] During welding, the various components of frame 22 are positioned on the platform 1 using positioning components. The worker stands in front of the platform 1 and can begin welding the front portion of frame 22. Then, the first motor 5 rotates, driving the outer ring of bearing 20 to rotate through the meshing of the drive gear 19 and driven gear 21, thereby reversing the front and back positions of the platform 1. This allows the worker to weld the rear portion of frame 22 without having to move to the back of the platform 1, making welding more convenient. Driven by the first motor 5, the platform 1 can not only be reversed front and back but also rotated to any angle. This allows for angle adjustments to positions where welding from the front of the platform 1 is inconvenient for the worker, facilitating welding. Furthermore, driven by the second motor 6, the vertical welding position can be changed to a horizontal welding position, further simplifying the welding process.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A welding fixture for a tow seat frame, comprising a bench (1) provided with a positioning assembly for positioning a frame (22), characterized in that, It also includes a support (2) located below the platform (1), on which a first motor (5) is fixedly connected. A drive gear (19) is fixedly connected to the shaft of the first motor (5). A bearing (20) is provided between the platform (1) and the support (2). The inner ring of the bearing (20) is fixedly connected to the support (2), and the outer ring of the bearing (20) is fixedly connected to the middle of the bottom surface of the platform (1). The outer ring of the bearing (20) is provided with a driven gear (21) that meshes with the drive gear (19).

2. The welding fixture of the tractor seat frame according to claim 1, characterized in that, The frame (1) includes a base plate (1a) and a platform (1b) arranged in parallel. The platform (1b) is located above the base plate (1a). The outer ring of the bearing (20) is fixedly connected to the bottom surface of the base plate (1a). Several support columns (1c) are connected between the platform (1b) and the base plate (1a). The positioning assembly includes several clamping cylinders (7) hinged to the base plate (1a). A clamping claw (8) is hinged to the platform (1b). The upper end of the clamping claw (8) passes upward through the platform (1b). The lower end of the clamping claw (8) is hinged to the piston rod of the clamping cylinder (7).

3. The welding fixture of claim 2, wherein, Multiple clamping blocks (9) are also fixed on the upper surface of the platform (1b). The number of clamping blocks (9) is less than that of clamping claws (8). The clamping blocks (9) are arranged corresponding to some of the clamping claws (8).

4. The welding fixture for a seat frame according to claim 2 or 3, characterized in that, The base plate (1a) is fixed with pin cylinders (10) at both ends. The piston rod of the pin cylinder (10) is parallel to the base plate (1a). A connecting plate (11) is fixedly connected to the piston rod of the pin cylinder (10). A pin (12) parallel to the piston rod of the pin cylinder (10) is fixed on the connecting plate (11). The two pins (12) are arranged opposite to each other and located above the platform (1b).

5. The welding fixture of claim 4, wherein, Both ends of the platform (1b) are fixed with sockets (13), and the pins (12) are inserted into the sockets (13).

6. The welding fixture of claim 5, wherein, Each socket (13) has a stop cylinder (14) fixed on its upper surface. The piston rod of the stop cylinder (14) is arranged parallel to the platform (1b). The piston rods of the two stop cylinders (14) are arranged opposite to each other and are both fixed with pressure plates (15).

7. The welding fixture of claim 6, wherein, The positioning assembly also includes two swing arm cylinders (17) fixedly connected to the platform (1b). The swing arm of the swing arm cylinder (17) is fixedly connected to a positioning seat (18). The positioning seat (18) is located above the platform (1b). The two positioning seats (18) are set one-to-one with the two pressure plates (15).

8. The welding fixture for a seat frame of a towing vehicle according to any one of claims 1 to 3, characterized in that, The welding fixture for the traction seat frame also includes two supports (23). The bracket (2) is located between the two supports (23). Both ends of the bracket (2) are fixed with swing seats (3). A swing shaft (4) is fixed on the swing seat (3). The swing shaft (4) passes through the corresponding support (23). A second motor (6) is fixed on one of the supports (23). One of the swing shafts (4) is connected to the shaft of the second motor (6).

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