Positioning device for door hinge welding

Abstract

The utility model discloses a kind of positioning device of vehicle door folding welding, mainly related to vehicle door welding field. Including fixed frame, the fixed frame is equipped with crossbeam, the top of the crossbeam is equipped with the welding station for placing vehicle door, the vehicle door is symmetrically equipped with folding, the folding includes pinhole end and straight end, the welding station is equipped with the positioning block for cooperation pinhole end and straight end use, the positioning block of two ends is located at the two sides of folding respectively, positioning column is equipped on the positioning block close to pinhole end, the positioning column is movably inserted with pinhole end, the positioning block close to straight end is equipped with the pressure block for cooperation straight end use. The utility model has the beneficial effect that it can solve the technical problem that folding position is prone to misplacement and reduces welding quality when welding, effectively fixes the position of both ends of folding, avoids the movement misplacement of folding in welding process, improves the accuracy of welding, and guarantees the quality of welding.

Description

Technical Field

[0001] This utility model relates to the field of car door welding, specifically a positioning device for car door hinge welding. Background Technology

[0002] The lower side door of a train used for freight transport is connected to the main body of the train using hinges, which facilitate the opening and closing control of the lower side door by rotation. Therefore, the hinges need to be pre-welded to the train door before it leaves the factory. Due to the special structure of the hinge, one end of which is an arc-shaped part with a pin hole, its position relative to the door is not easy to fix during welding. This causes the position of the hinge to easily shake or become misaligned during the actual welding operation, resulting in insufficient accuracy of the hinge welding position and reducing the quality of the welding process. Utility Model Content

[0003] The purpose of this utility model is to provide a positioning device for welding door hinges, which can solve the technical problem that the position of the hinges is easily misaligned during welding, thus reducing the welding quality. It can effectively fix the position of both ends of the hinge, avoid the movement and misalignment of the hinge during the welding process, improve the welding accuracy, and ensure the welding quality.

[0004] To achieve the above objectives, this utility model employs the following technical solution: A positioning device for welding car door hinges includes a fixing frame with a crossbeam on the fixing frame. The top of the crossbeam has a welding platform for placing the car door. The car door has symmetrically arranged hinges, each hinge including a pin hole end and a straight end. The welding platform has positioning blocks that cooperate with the pin hole end and the straight end. The positioning blocks at both ends are located on both sides of the hinge. The positioning block near the pin hole end has a positioning post that is movably inserted into the pin hole end. The positioning block near the straight end has a pressure block that cooperates with the straight end.

[0005] Furthermore, the cross-section of the positioning block near the pin hole end is L-shaped, and the two adjacent side walls of the pin hole end are in contact with the two sides of the L-shape respectively, and the positioning post is set on one side of the L-shape.

[0006] Furthermore, a vertically movable pressure rod is provided on the positioning block near the pin hole end, and the pressure rod is in contact with the top of the pin hole end.

[0007] Furthermore, a fixing nut is provided on the top of the positioning block near the pin hole end, and the pressure rod is threadedly connected to the fixing nut.

[0008] Furthermore, a telescopic rod is provided on one side of the positioning block near the straight end, and the pressure block is rotatably connected to the movable end of the telescopic rod.

[0009] Furthermore, the bottom of the positioning block is provided with a movable seat, which is movably connected to the welding table.

[0010] Furthermore, the welding platform is provided with multiple mounting holes, and the movable base is provided with fixing bolts that are used in conjunction with the mounting holes.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. The structure of this utility model has a crossbeam on the fixing frame, and a welding table is fixed on the crossbeam. The welding table is equipped with positioning blocks for use with the pin hole end and the straight end of the fold. The positioning block near the pin hole end is equipped with a positioning post, which is movably inserted into the pin hole end. This structure allows the pin hole end of the fold to be directly sleeved on the positioning post when it is fixed. The positioning blocks at both ends fix the pin hole end and the straight end respectively, thereby making the position of the fold more stable after fixing. Without affecting the welding operation of the fold, it greatly improves the fixing effect of the fold, avoids the possible movement and misalignment of the fold during the welding process, greatly improves the accuracy of the fold welding, and ensures the welding quality. 2. The positioning block near the straight end is equipped with a pressure block for use with the straight end. The positioning blocks at both ends are located on both sides of the fold. This structure allows the fold to be fixed by first rotating it to a vertical position, fitting the pin hole at the pin end onto the positioning post, and then rotating the fold to a horizontal position so that its straight end rotates to the vicinity of the positioning block at the other end. At this time, the positioning blocks at both ends are located on both sides of the fold. With the positioning post and the pin hole end movablely inserted, the fold can be effectively prevented from shifting in the horizontal plane. At the same time, the pressure block on the positioning block near the straight end presses down and fixes the rotated fold, thereby preventing the fold from rotating in the vertical plane. This achieves all-round fixing of the fold, further improving the stability of the fold during welding. The structure is simple, easy to assemble and disassemble, and further ensures the quality of welding. Attached Figure Description

[0012] Appendix Figure 1 This is a three-dimensional structural diagram of the present invention.

[0013] Appendix Figure 2 This is a front view of the present invention.

[0014] Appendix Figure 3 This is an appendix to this utility model. Figure 2 A cross-sectional view along the AA direction.

[0015] Appendix Figure 4 This is an appendix to this utility model. Figure 3 A cross-sectional view along the BB direction.

[0016] The labels shown in the attached diagram: 1. Fixing frame; 2. Crossbeam; 3. Door; 4. Welding table; 5. Hinge; 6. Pin hole end; 7. Straight end; 8. Positioning block; 9. Positioning post; 10. Pressure block; 11. Pressure rod; 12. Fixing nut; 13. Telescopic rod; 14. Moving seat; 15. Mounting hole; 16. Fixing bolt. Detailed Implementation

[0017] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0018] Reference Figure 1 and Figure 2This utility model describes a positioning device for welding hinges on a car door. The main structure includes a fixing frame 1, which is fixed to the ground at the welding site by welding or bolts for support. The fixing frame 1 is generally made of metal. A crossbeam 2 is fixed to the fixing frame 1 by welding or bolts. The crossbeam 2 has a U-shaped cross section, providing stable planar support. A welding table 4 for placing the car door 3 is fixed to the top of the crossbeam 2 by welding or bolts. The welding table 4 provides support for the car door 3, and welding operations are performed above the welding table 4. Hinges 5 are symmetrically arranged on the car door 3, which are used to rotatably connect the car door 3 to the main body of the train car body, facilitating the rotation of the car door 3. The hinge 5 includes a pin hole end 6 and a straight end 7. The pin hole end 6 has a pin hole and connects to a pin shaft on the main body of the train car body, enabling relative rotation of the door 3 relative to the main body of the train car body. The straight end 7 is a plate-like structure that cooperates with a lock on the main body of the train car body to lock and fix the door 3. The specific connection structure of the door 3 can be referenced from the structure of the lower side door of the C70 type general-purpose open wagon. The welding table 4 is equipped with positioning blocks 8 that cooperate with the pin hole end 6 and the straight end 7. The positioning blocks 8 are located at both ends of the hinge 5 to fix the pin hole end 6 and the straight end 7. The positioning blocks 8 at both ends are located on both sides of the hinge 5, and the positioning blocks 8 on both sides are used to position the hinge 5 on the welding table 4. To restrict and prevent the hinge 5 from shifting or moving in the horizontal plane, ensuring the stability of the hinge 5 during welding, a positioning post 9 is fixed to the positioning block 8 near the pin hole end 6 by welding or integral molding. The positioning post 9 is arranged horizontally and is movably inserted into the pin hole end 6. Preferably, a fixing cap is threaded to the end of the positioning post 9, and the fixing cap contacts the side of the pin hole end 6. After the hinge 5 is fitted onto the positioning post 9, the fixing cap is used to restrict and fix its position. With this structure, when the hinge 5 is fixed, it is rotated to the vertical position, and the pin hole of the pin hole end 6 is fitted onto the positioning post 9, thus initially fixing the position of the hinge 5. The positioning block 8 near the straight end 7 is provided with a matching straight end 7. Using the pressure block 10, the hinge 5 is rotated to a horizontal position. At this time, the positioning blocks 8 at both ends are located on the left and right sides of the hinge 5, thus preventing the hinge 5 from shifting in the horizontal plane during welding. Then, the pressure block 10 on the positioning block 8 near the straight end 7 is used to vertically press and fix the straight end 7 of the hinge 5. With the insertion and engagement of the positioning post 9 and the pin hole end 6, the hinge 5 is prevented from rotating in the vertical plane. Thus, the hinge 5 is fixed in all directions, preventing possible shifting during welding, improving the stability of the hinge 5 during welding, and the structure is simple, easy to assemble and disassemble, further ensuring the quality of welding.

[0019] Preferably, the cross-section of the positioning block 8 near the pin hole end 6 is L-shaped, and the two adjacent side walls of the pin hole end 6 are in contact with the two sides of the L-shape respectively. The positioning post 9 is set on one side of the L-shape. This structure allows the L-shape to contact the two sides of the pin hole end 6 of the hinge 5, thereby more comprehensively restricting and fixing the position of the pin hole end 6, and further improving the effect of limiting and fixing.

[0020] Preferably, a vertically movable pressure rod 11 is provided on the positioning block 8 near the pin hole end 6. The pressure rod 11 contacts the top of the pin hole end 6. With this structure, after the fold 5 rotates from vertical to horizontal, the pressure rod 11 moves downward to press and fix the top of the pin hole end 6, so that the pin hole end 6 is firmly pressed and fixed on the positioning post 9. This can also further prevent the pin hole end 6 from rotating and misaligning, and further improve the overall fixing effect of the fold 5.

[0021] Preferred, refer to Figure 3 A fixing nut 12 is welded to the top of the positioning block 8 near the pin hole end 6. The pressure rod 11 is threadedly connected to the fixing nut 12. With this structure, the bottom end of the pressure rod 11 can be driven to rotate and move under the action of the threaded connection, thereby achieving the pressing and fixing of the pin hole end 6. The structure is simple and easy to operate. After rotation, the position of the pressure rod 11 can be fixed by the threaded connection, making the pressing and fixing of the pin hole end 6 more convenient and stable.

[0022] Preferably, a telescopic rod 13 is fixed to one side of the positioning block 8 near the straight end 7 by welding or bolting. Specifically, a cylinder or electric cylinder structure can be used. The pressure block 10 is rotatably connected to the movable end of the telescopic rod 13 through a bearing. This structure allows the pressure block 10 to be moved above the straight end 7 by rotation. Then, the contraction of the telescopic rod 13 automatically controls the pressure block 10 to move downward to press the straight end 7. After welding is completed, the telescopic rod 13 extends, and the pressure block 10 is rotated to disengage it from above the straight end 7, thereby releasing the pressing and fixing of the straight end 7. This makes the pressing and fixing and the unfixing of the straight end 7 more efficient and convenient.

[0023] Preferred, refer to Figure 4 The bottom of the positioning block 8 is fixed with a movable seat 14 by welding or integral molding. The movable seat 14 is movably connected to the welding table 4. This structure can adjust the position of the movable seat 14 according to the welding requirements of different sizes of car doors 3, so that the positioning block 8 can cooperate with the hinge 5 of the corresponding size position, making it more adaptable to welding different types of car doors 3 and improving the application range of the device.

[0024] Preferably, the welding table 4 is provided with multiple through mounting holes 15, and the movable seat 14 is provided with fixing bolts 16 that cooperate with the mounting holes 15. This structure allows the movable seat 14 to be moved to the corresponding mounting hole 15 and then fixed with the fixing bolts 16, thereby realizing the adjustment of the position of the movable seat 14 relative to the welding table 4. The structure is simple and the adjustment is very convenient, making it more convenient and efficient to fix the hinge 5 when welding different types of car doors 3.

[0025] Working Principle: This utility model features a frame 1 with a crossbeam 2. A welding table 4 is fixed to the crossbeam 2. The welding table 4 has positioning blocks 8 for use with the pin hole end 6 and the straight end 7 of the hinge 5. Positioning blocks 8 near the pin hole end 6 have positioning posts 9, which are movably inserted into the pin hole end 6. This structure allows the hinge 5 to be fixed by directly fitting its pin hole end 6 onto the positioning post 9. The positioning blocks 8 at both ends fix the pin hole end 6 and the straight end 7 respectively, making the fixed position of the hinge 5 more stable. Without affecting the welding operation of the hinge 5, this significantly improves the fixing effect of the hinge 5, avoids possible movement or misalignment of the hinge 5 during welding, greatly improves the accuracy of the welding, and ensures the welding quality. The positioning blocks 8 near the straight end 7 have positioning blocks for use with the straight end 7. The pressure block 10 and the positioning blocks 8 at both ends are located on both sides of the hinge 5. This structure allows the hinge 5 to be fixed by first rotating it to a vertical position, so that the pin hole of the pin hole end 6 is fitted onto the positioning post 9. Then, the hinge 5 is rotated to a horizontal position, so that its straight end 7 rotates to the vicinity of the positioning block 8 at the other end. At this time, the positioning blocks 8 at both ends are located on both sides of the hinge 5. With the movable insertion of the positioning post 9 and the pin hole end 6, the hinge 5 is effectively prevented from shifting in the horizontal plane. At the same time, the pressure block 10 on the positioning block 8 near the straight end 7 presses down and fixes the rotated hinge 5, thereby preventing the hinge 5 from rotating in the vertical plane. This achieves a 360-degree fixation operation for the hinge 5, further improving the stability of the hinge 5 during welding. The structure is simple, easy to assemble and disassemble, and further ensures the quality of welding.

Claims

1. A positioning device for welding hinged car doors, comprising a fixing frame (1), characterized in that: The fixing frame (1) is provided with a crossbeam (2), and the top of the crossbeam (2) is provided with a welding table (4) for placing the car door (3). The car door (3) is provided with hinges (5) symmetrically. The hinge (5) includes a pin hole end (6) and a straight end (7). The welding table (4) is provided with positioning blocks (8) that cooperate with the pin hole end (6) and the straight end (7). The positioning blocks (8) at both ends are located on both sides of the hinge (5). The positioning block (8) near the pin hole end (6) is provided with a positioning post (9). The positioning post (9) is movably inserted into the pin hole end (6). The positioning block (8) near the straight end (7) is provided with a pressure block (10) that cooperates with the straight end (7).

2. The positioning device for welding door hinges according to claim 1, characterized in that: The positioning block (8) near the pin hole end (6) has an L-shaped cross section. The two adjacent side walls of the pin hole end (6) are in contact with the two sides of the L-shape respectively. The positioning post (9) is set on one side of the L-shape.

3. The positioning device for welding door hinges according to claim 1, characterized in that: A vertically movable pressure rod (11) is provided on the positioning block (8) near the pin hole end (6), and the pressure rod (11) is in contact with the top of the pin hole end (6).

4. The positioning device for welding door hinges according to claim 3, characterized in that: A fixing nut (12) is provided on the top of the positioning block (8) near the pin hole end (6), and the pressure rod (11) is threadedly connected to the fixing nut (12).

5. The positioning device for welding door hinges according to claim 1, characterized in that: A telescopic rod (13) is provided on one side of the positioning block (8) near the straight end (7), and the pressure block (10) is rotatably connected to the movable end of the telescopic rod (13).

6. The positioning device for welding door hinges according to claim 1, characterized in that: The bottom of the positioning block (8) is provided with a movable seat (14), which is movably connected to the welding table (4).

7. The positioning device for welding door hinges according to claim 6, characterized in that: The welding table (4) is provided with multiple mounting holes (15), and the movable seat (14) is provided with fixing bolts (16) that are used in conjunction with the mounting holes (15).

Images