Positioning fixture for welding a vehicle body

Abstract

This utility model belongs to the field of automotive body welding technology, specifically a positioning fixture for automotive body welding. It includes a base, with an assembly frame fixedly mounted on the top of the base. T-shaped grooves are formed on both the left and right sides of the assembly frame. A support mechanism is movably mounted inside the T-shaped grooves. The support mechanism includes a positioning plate, with a U-shaped groove on its outer surface. A rotating wheel is rotatably mounted inside the U-shaped groove. Load-bearing arms are mounted on both sides of the positioning plate near the center of the assembly frame. Through the structural design of the assembly frame, support mechanism, positioning mechanism, drive motor, and transmission gears, the fixture's versatility is increased. This allows the entire vehicle body to rotate, eliminating the need for frequent adjustments to the position and posture of the welding equipment and the vehicle body, enabling welding of different parts of the vehicle body. Furthermore, rotary welding facilitates operator observation and control of the welding process.

Description

Technical Field

[0001] This utility model relates to the field of automotive body welding technology, specifically a positioning fixture for automotive body welding. Background Technology

[0002] With the progress of the times and the development of society, there are more and more types and appearances of cars. Along with the development of the automotive industry, related automotive industries have also increased. When welding car bodies, body welding equipment is required. During the welding process, the car body needs to be positioned and clamped to prevent the car body from shifting during welding.

[0003] Currently, the positioning fixtures commonly used for traditional automotive welding, after fixing the car body, cannot rotate the car body when dealing with complex shapes or car body parts that need to be welded from multiple angles. This means that workers may need to spend extra time repositioning the workpiece or changing their working posture to achieve the ideal welding position, which not only increases the time consumption of a single task but also reduces the overall production efficiency.

[0004] Therefore, a positioning fixture for vehicle body welding is proposed to address the above problems. Utility Model Content

[0005] To overcome the shortcomings of existing technologies and the limitations of traditional fixtures, this utility model proposes a positioning fixture for vehicle body welding.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a positioning fixture for vehicle body welding, including a base, an assembly frame fixedly installed on the top of the base, T-shaped grooves opened on both the left and right sides of the assembly frame, a support mechanism movably installed inside the T-shaped grooves, the support mechanism including a positioning plate, a U-shaped groove opened on the outer surface of the positioning plate, a rotating wheel rotatably installed inside the U-shaped groove, a load-bearing arm installed on both sides of the positioning plate near the middle of the assembly frame, a positioning mechanism movably installed on the surface of the load-bearing arm, a drive motor fixedly installed on one side of the base, a drive gear fixedly installed at the end of the output end of the drive motor, a transmission belt meshing with the surface of the drive gear, a transmission gear fixedly installed in the middle of the positioning plate near the drive motor, and the transmission gear meshing with the inner ring of the top of the transmission belt.

[0007] Preferably, the top of the load-bearing arm has a vertical hole, and a dual-axis motor is fixedly installed in the middle part of the side of the load-bearing arm near the middle part of the assembly frame. The output ends on both sides of the dual-axis motor are both set as threaded shafts.

[0008] Preferably, the threaded shaft is connected to a U-shaped connecting frame on its surface, and abutments are installed at each of the two corners of the top of the U-shaped connecting frame. A through hole is provided in the middle of the top of the U-shaped connecting frame.

[0009] Preferably, the positioning mechanism includes a hydraulic cylinder, which is fixedly connected to the bottom surface of the U-shaped connecting frame. An L-shaped top plate is fixedly installed at the end of the output end of the hydraulic cylinder, and steering seats are fixedly installed on both sides of the bottom of the L-shaped top plate.

[0010] Preferably, a positioning rod is fixedly installed inside the steering seat, a connecting piece is sleeved on the surface of the positioning rod, a threaded rod is fixedly installed at the bottom of the connecting piece, and a tightening nut is meshed on the surface of the threaded rod.

[0011] Preferably, a positioning groove is provided on one side of the abutment plate, and the position of the positioning groove is adapted to the steering seat.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model, through the structural design of the assembly frame, support mechanism, positioning mechanism, drive motor, and transmission gear, and through the mutual cooperation between the structures, realizes the function of increasing the versatility of the fixture. This allows the entire vehicle body to rotate, so that the welding equipment and the vehicle body do not need to be frequently adjusted in position and posture to weld different parts of the vehicle body. At the same time, rotary welding also makes it easier for operators to observe and control the welding process, promptly detect and deal with welding defects, further ensure welding quality, and solve the problem of the great limitations of traditional fixtures.

[0014] 2. This utility model uses a hydraulic cylinder and an L-shaped top plate to work together to press the top of the fixed position of the vehicle body, thereby ensuring the stability of the vehicle body during subsequent rotation and avoiding vibration and positional deviation caused by the rotation of the vehicle body, thus ensuring the consistency and stability of the welded joint. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a rear-view diagram of the overall structure of this utility model;

[0018] Figure 3 This is a partial structural cross-sectional view of the present invention;

[0019] Figure 4 This is a partial structural breakdown diagram of the present invention.

[0020] In the diagram: 1. Base; 2. Assembly frame; 3. T-shaped slide; 4. Support mechanism; 401. Positioning plate; 402. U-shaped groove; 403. Rotary wheel; 404. Load-bearing arm; 5. Positioning mechanism; 6. Drive motor; 7. Drive gear; 8. Transmission belt; 9. Transmission gear; 10. Vertical hole; 11. Dual-axis motor; 12. Threaded shaft; 13. U-shaped connecting frame; 14. Support plate; 15. Through hole; 501. Hydraulic cylinder; 502. L-shaped top plate; 503. Steering seat; 16. Positioning rod; 17. Connector; 18. Threaded rod; 19. Tightening nut; 20. Positioning groove. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0022] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0023] This application discloses a positioning fixture for vehicle body welding, including a base 1. An assembly frame 2 is fixedly installed on the top of the base 1. T-shaped grooves 3 are provided on both the left and right sides of the assembly frame 2. A support mechanism 4 is movably installed inside the T-shaped grooves 3. The support mechanism 4 includes a positioning plate 401. A U-shaped groove 402 is provided on the outer surface of the positioning plate 401. A rotating wheel 403 is rotatably installed inside the U-shaped groove 402. A load-bearing arm 404 is installed on both sides of the positioning plate 401 near the middle of the assembly frame 2. A positioning mechanism 5 is movably installed on the surface of the load-bearing arm 404. A drive motor 6 is fixedly installed on one side of the base 1. A drive gear 7 is fixedly installed at the end of the output end of the drive motor 6. A transmission belt 8 is meshed with the surface of the drive gear 7. A transmission gear 9 is fixedly installed in the middle of the positioning plate 401 near the drive motor 6. The transmission gear 9 is meshed with the inner ring of the top of the transmission belt 8.

[0024] Reference Figure 1 , Figure 2 , Figure 3Through the structural design of the assembly frame 2, support mechanism 4, positioning mechanism 5, drive motor 6, and transmission gear 9, and through the cooperation between the structures, the function of increasing the versatility of the fixture is realized. This allows the entire vehicle body to rotate, so that the welding equipment and the vehicle body do not need to be frequently adjusted in position and posture to weld different parts of the vehicle body. At the same time, rotary welding also makes it easier for operators to observe and control the welding process, promptly detect and deal with welding defects, and further ensure welding quality.

[0025] The top of the load-bearing arm 404 has a vertical hole 10. A dual-axis motor 11 is fixedly installed in the middle part of the side of the load-bearing arm 404 near the middle part of the assembly frame 2. The output ends on both sides of the dual-axis motor 11 are set as threaded shafts 12.

[0026] Reference Figure 3 and Figure 4 The vertical hole 10 facilitates the provision of movement space for the output end of the hydraulic cylinder 501, thereby ensuring that the L-shaped top plate 502 can follow the positioning mechanism 5 to move. The dual-axis motor 11 and threaded shaft 12 facilitate the use of rotation to drive the U-shaped connecting frame 13 to make linear movement, so that the subsequent abutment plate 14 can provide abutment positioning for the vehicle body. The U-shaped connecting frame 13 facilitates the provision of installation space for the abutment plate 14.

[0027] The threaded shaft 12 is meshed with a U-shaped connecting bracket 13. Each of the two corners of the top of the U-shaped connecting bracket 13 is equipped with a stop plate 14. A through hole 15 is opened in the middle part of the top of the U-shaped connecting bracket 13.

[0028] Reference Figure 4 The abutment plate 14 facilitates the clamping position at the root of the vehicle body, thereby ensuring stability during the subsequent vehicle body welding process. The through hole 15 facilitates the extension space of the output end of the hydraulic cylinder 501, thereby ensuring the subsequent insertion and removal of the vehicle body into the device.

[0029] The positioning mechanism 5 includes a hydraulic cylinder 501, which is fixedly connected to the bottom surface of the U-shaped connecting frame 13. An L-shaped top plate 502 is fixedly installed at the end of the output end of the hydraulic cylinder 501, and steering seats 503 are fixedly installed on both sides of the bottom of the L-shaped top plate 502.

[0030] Reference Figure 2 and Figure 4 The hydraulic cylinder 501 and the L-shaped top plate 502 work together to press down on the top of the fixed position of the vehicle body, thereby ensuring the stability of the vehicle body during subsequent rotation.

[0031] A positioning rod 16 is fixedly installed inside the steering seat 503. A connector 17 is sleeved on the surface of the positioning rod 16. A threaded rod 18 is fixedly installed at the bottom of the connector 17. A locking nut 19 is meshed on the surface of the threaded rod 18.

[0032] Reference Figure 4 The positioning rod 16 facilitates the installation space of the connector 17 and limits the connector 17 to ensure that the subsequent connector 17 can drive the threaded rod 18 to revolve. The threaded rod 18 facilitates the installation space of the clamping nut 19 to ensure that the subsequent clamping nut 19 cooperates with the abutment plate 14 to further position the L-shaped top plate 502, thereby improving the safety of the device.

[0033] A positioning groove 20 is provided on one side of the abutment plate 14, and the position of the positioning groove 20 is adapted to the steering seat 503.

[0034] Reference Figure 4 The positioning groove 20 facilitates the overlap of the threaded rod 18 and the abutment plate 14, and at the same time, it works with the abutment nut 19 to fix the threaded rod 18.

[0035] Working principle: When using this device, after the vehicle body is supported by the load-bearing arm 404, the dual-axis motor 11, in conjunction with the threaded shaft 12, drives the U-shaped connecting frame 13 to move horizontally on the load-bearing arm 404, so that the position of the positioning mechanism 5 corresponds to the positioning point of the vehicle body parts. After the abutment plate 14 contacts the vehicle body, the output end of the hydraulic cylinder 501 drives the L-shaped top plate 502 to press down. The L-shaped top plate 502 holds the vehicle body, and the connecting piece 17 rotates on the surface of the positioning rod 16. The threaded rod 18 is embedded in the positioning groove 20. After the abutment plate 14 is stacked by rotating the tightening nut 19, the positioning and clamping of the vehicle body is completed. The drive motor 6 is started, and the drive motor 6 drives the drive gear 7 to rotate. The drive gear 7 transmits power to the transmission gear 9 on the positioning plate 401 through the transmission belt 8, so that the positioning plate 401 rotates in the T-shaped slide groove 3. The positioning plate 401, in conjunction with the load-bearing arm 404 and the positioning mechanism 5, drives the vehicle body to rotate until it reaches the predetermined angle, and welding continues.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A positioning jig for a vehicle body welding, characterized by: Includes a base (1); an assembly frame (2) is fixedly installed on the top of the base (1), and T-shaped grooves (3) are provided on both the left and right sides of the assembly frame (2). A support mechanism (4) is movably installed inside the T-shaped grooves (3), and the support mechanism (4) includes a positioning plate (401). A U-shaped groove (402) is provided on the outer surface of the positioning plate (401), and a rotating wheel (403) is rotatably installed inside the U-shaped groove (402). The two sides of the positioning plate (401) near the middle of the assembly frame (2) are... Each side is equipped with a load-bearing arm (404), and a positioning mechanism (5) is movably mounted on the surface of the load-bearing arm (404). A drive motor (6) is fixedly mounted on one side of the base (1), and a drive gear (7) is fixedly mounted at the end of the output end of the drive motor (6). A transmission belt (8) is meshed with the surface of the drive gear (7). A transmission gear (9) is fixedly mounted in the middle of the positioning disc (401) near the drive motor (6), and the transmission gear (9) meshes with the inner ring of the top of the transmission belt (8).

2. A positioning fixture for welding a vehicle body according to claim 1, characterized in that: The top of the load-bearing arm (404) is provided with a vertical hole (10). A dual-axis motor (11) is fixedly installed on the middle part of the side of the load-bearing arm (404) near the middle part of the assembly frame (2). The output ends on both sides of the dual-axis motor (11) are both set as threaded shafts (12).

3. A fixture for positioning a vehicle body for welding, according to claim 2, wherein: The threaded shaft (12) is meshed with a U-shaped connecting frame (13), and a stop plate (14) is installed at each of the two corners of the top of the U-shaped connecting frame (13). A through hole (15) is opened in the middle part of the top of the U-shaped connecting frame (13).

4. The fixture of claim 1 wherein: The positioning mechanism (5) includes a hydraulic cylinder (501), which is fixedly connected to the bottom surface of the U-shaped connecting frame (13). An L-shaped top plate (502) is fixedly installed at the end of the output end of the hydraulic cylinder (501), and steering seats (503) are fixedly installed on both sides of the bottom of the L-shaped top plate (502).

5. A positioning fixture for welding a vehicle body according to claim 4, wherein: A positioning rod (16) is fixedly installed inside the steering seat (503). A connector (17) is sleeved on the surface of the positioning rod (16). A threaded rod (18) is fixedly installed at the bottom of the connector (17). A tightening nut (19) is meshed on the surface of the threaded rod (18).

6. The fixture of claim 3 wherein: A positioning groove (20) is provided on one side of the abutment plate (14), and the position of the positioning groove (20) is adapted to the steering seat (503).

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