Car door assembling and positioning tool

Abstract

The invention belongs to the technical field of vehicle door assembly, and provides a vehicle door assembly positioning tool which comprises a tool base, a positioning reference part, a supporting part, a limiting part and a pressing part. The positioning reference part is fixedly installed on the tool base and used for positioning and installing the tool base to the side wall of a vehicle body. The supporting part is fixedly installed on the tool base, and the supporting face of the supporting part is used for supporting the vehicle door hinge in the Z direction. The limiting component and the pressing component are connected to the corresponding operation handles through independent lever mechanisms and are movably arranged on the tool base. The limiting component is provided with a limiting face used for abutting against the automobile door in the X direction, and the pressing component is provided with a pressing face used for pressing the automobile door in the Y direction. The supporting face, the limiting face and the pressing face are configured to jointly position and fix the vehicle door in the X direction, the Y direction and the Z direction, and the lever mechanism is driven by manpower through an operation handle. Manual operation and installation are facilitated, and the assembling precision of the vehicle door can be guaranteed.

Description

A door assembly positioning fixture Technical Field

[0001] This application relates to the field of vehicle door assembly technology, and in particular to a vehicle door assembly positioning fixture. Background Technology

[0002] In the manufacturing process of passenger vehicles, the assembly quality of the doors directly affects the overall appearance, sealing performance, and user experience, making the assembly process crucial. Traditional door assembly typically uses self-positioning stamped hinges followed by direct bolt assembly. This process has significant drawbacks: firstly, the structural strength of stamped hinges is limited, and long-term use can lead to door sagging due to deformation under stress, affecting door closing accuracy and durability; secondly, this assembly method relies on the natural matching of the hinges with the body's mounting holes, resulting in low positioning accuracy, poor assembly consistency, and issues such as gaps and surface defects, leading to substantial subsequent adjustment work.

[0003] To improve assembly precision and the long-term reliability of car doors, major domestic and international automakers have widely adopted higher-strength, more structurally stable steel hinges instead of stamped hinges, and have also widely introduced fixture-assisted assembly methods. By using fixtures to precisely position and temporarily fix the car door to the body, the consistency and precision of the assembly process can be significantly improved, reducing subsequent manual adjustment steps and effectively increasing the assembly cycle time of the car doors.

[0004] However, in current practices of assembling car doors based on steel hinges, there are still two typical problematic solutions: one is to use the traditional stamped hinge self-positioning bolt assembly method, which has a large matching error and is difficult to meet the high precision requirements of mid-to-high-end models for body gaps and surface differences; the other is the large positioning fixtures commonly used on the adjustment line. Although this solution has a certain degree of precision, it mostly relies on pneumatic devices to press the door and body together, and often requires the use of a assisted robotic arm for operation, resulting in complex equipment, cumbersome operation procedures, and limited cycle time. Overall efficiency and flexibility still have considerable room for improvement.

[0005] To address at least one of the aforementioned problems, existing technologies have continuously developed various types of assembly positioning devices. For example, patent CN217097391U discloses a body-in-white door assembly positioning system device, including a tooling body, positioning pins, and limiting blocks. The positioning pins include a main positioning pin and an auxiliary positioning pin for positioning the tooling body and the door frame in the X and Z directions. The main positioning pin is installed on the main positioning hole of the side wall assembly, and the auxiliary positioning pin is installed on the fender mounting hole on the door frame of the stamped part. The main positioning pins of the door assembly in the X and Z directions are installed on the rearview mirror mounting holes on the outer panel of the door. The auxiliary positioning block is installed on the front contour line of the door. The front end of the door assembly is attached to the positioning surface of the X-direction limiting block. The fixed suction block on the tooling body is connected to the door frame in the Y direction. A movable positioning pin is provided at one end of the tooling body 1, which positions the workpiece and the tooling body in the X and Z directions. This device is used for positioning during the assembly of the doors of the automotive body-in-white assembly. The system controls the dimensional accuracy and consistency of the door assembly, eliminating the need for operators to make dimensional adjustments. Experiments have shown that vehicles produced using this tooling not only meet design requirements for door appearance gap dimensions, but also have significantly simplified the door assembly process, resulting in a substantial improvement in production efficiency. However, the positioning accuracy of this process depends on the manufacturing precision of the door assembly itself, and it cannot effectively isolate the impact of door component errors on subsequent assembly positioning. Furthermore, since this process uses fixed suction blocks, if the door is too heavy, the suction force may be insufficient, and the door may still be at risk of sagging.

[0006] For example, patent CN203003744U discloses a positioning fixture for adjusting the rear door assembly line, including a support rod. The upper end of the support rod is connected to a positioning pin seat, which has an X-axis positioning pin. The upper end of the positioning pin seat is connected to a slot base, which has a Y-axis slot at its left end. The right end of the slot base is connected to a first fixing block. A first handle and a first connecting block are hinged to the first fixing block. The first handle and the first connecting block are hinged together by a first swing arm. The first connecting block is connected to a fixture arm, which includes a horizontal arm and a vertical arm. The end of the vertical arm has a first chuck that mates with the X-axis positioning pin. The lower end of the support rod is connected to a Y-axis clamping mechanism. This fixture has a novel structure, small size, and is stable and reliable. The fluctuation range in the X, Y, and Z directions is small, fully meeting the geometric requirements. A single person can quickly assemble the rear door while ensuring quality. However, the clamp uses a vertical support rod as the core load-bearing and connecting structure. This structure may have insufficient support rigidity when dealing with heavy car doors, thus limiting overall stability. Furthermore, the X-axis positioning and Y-axis clamping of the device are mechanically linked through the clamp arm. This method has a high coupling between positioning and clamping, resulting in poor adjustment flexibility. Summary of the Invention

[0007] In view of the shortcomings of the existing technology, the present invention provides a door assembly and positioning fixture that does not require auxiliary robotic arms or other equipment, can be operated manually by a single person, and can ensure the assembly accuracy of the door.

[0008] To achieve the above and related objectives, the present invention provides a door assembly positioning fixture, including a fixture base, a positioning reference component, a support component, a limiting component, and a clamping component;

[0009] The positioning reference component is fixedly installed on the tooling base and is used to cooperate with the positioning structure of the vehicle side panel to position and install the tooling base to the vehicle side panel.

[0010] The support component is fixedly installed on the tooling base, and its support surface is used to support the door hinge from the Z direction;

[0011] Both the limiting component and the clamping component are connected to the corresponding operating handles via independent lever mechanisms and are movably mounted on the tooling base; the limiting component is provided with a limiting surface for abutting the door from the X direction, and the clamping component is provided with a clamping surface for clamping the door from the Y direction.

[0012] The support surface, limiting surface, and pressing surface are configured to jointly position and fix the door in the X, Y, and Z directions, and the lever mechanism is driven manually by operating the handle.

[0013] Furthermore, the positioning reference component includes a main positioning pin and a secondary positioning pin. Both the main positioning pin and the secondary positioning pin are mounted on the tooling base via corresponding adapter blocks, and the secondary positioning pin has a positioning surface machined on it.

[0014] Furthermore, the support component includes multiple support blocks, which are mounted on the tooling base via corresponding adapter blocks. The positions of the support blocks correspond to the installation positions of the door hinges, and the support surfaces are set on the support blocks.

[0015] Furthermore, the lever mechanism includes a first manual lever mechanism for driving the limiting component and a second manual lever mechanism for driving the clamping component.

[0016] Furthermore, the first manual lever mechanism includes a first operating handle, a first fulcrum, and a first transmission component; the first fulcrum is fixed to the tooling base, and the first operating handle is rotatably mounted on the first fulcrum; the first transmission component is connected between the first operating handle and the limiting component to convert the rotation of the first operating handle into the movement of the limiting component along the X direction.

[0017] Furthermore, the second manual lever mechanism includes a second operating handle and a second transmission component; the second operating handle is rotatably mounted on the tooling base; the second transmission component is connected between the second operating handle and the clamping component to convert the rotation of the second operating handle into the movement of the clamping component along the Y direction.

[0018] Furthermore, the first support is an L-shaped support.

[0019] Furthermore, the second transmission component includes a plurality of transition blocks and connecting blocks that are hinged together in sequence.

[0020] Furthermore, it also includes a base locking mechanism, which includes a locking handle rotatably mounted on the tooling base, and a locking transmission assembly connected between the locking handle and the tooling base; by operating the locking handle, the tooling base, which has been positioned by the positioning reference component, is pressed against the side panel of the vehicle body.

[0021] Furthermore, the positioning fixture is made of aluminum alloy.

[0022] The beneficial technical effects of this invention are as follows:

[0023] This invention establishes an accurate installation benchmark for the entire positioning fixture by precisely matching the positioning reference component with the side panel of the vehicle body, fundamentally eliminating manual positioning errors. Furthermore, by using support components, limiting components, and clamping components to physically constrain and fix the door from the Z, X, and Y directions respectively, it ensures that the door is already in the preset assembly position before the fastening bolts are tightened, greatly improving the consistency and repeatability of the assembly.

[0024] This invention enables the trial production of soft film for soft vehicles and the small-batch trial production of door positioning and assembly. It can effectively position the doors in the X, Y, and Z directions, ensuring dimensional matching of the doors. It can also serve as a backup solution in case of malfunctions in the automated assembly of four doors on the production line, avoiding economic losses caused by production line downtime. Furthermore, this invention can be operated online or offline, unaffected by the production line construction schedule, making it suitable for simultaneous door matching and debugging during the early stages of product development and production line construction, thus shortening the door matching and debugging cycle.

[0025] All positioning and clamping actions in this invention are completed by a human-driven lever mechanism, eliminating the need to develop complex door assembly tools such as grippers, assisted robotic arms, and pneumatic fixtures. It is unaffected by the manufacturing environment and can serve as a backup solution in case of production line abnormalities, thus avoiding production line downtime.

[0026] The positioning fixture of this invention is made of aluminum alloy, which is lightweight and easy to install manually. It is simple and reliable to operate and can be quickly extended to other vehicle models at a low cost.

[0027] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0028] The accompanying drawings, incorporated in and forming part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without inventive effort. In the drawings:

[0029] Figure 1 is an axial view of the positioning fixture of this application;

[0030] Figure 2 is a front view of the positioning fixture of this application;

[0031] Figure 3 is a rear view of the positioning fixture of this application;

[0032] Figure 4 is a schematic diagram of an exemplary positioning tooling and vehicle body assembly according to this application;

[0033] Figure 5 is a schematic diagram of another exemplary positioning tooling and vehicle body assembly according to this application;

[0034] Figure 6 is a schematic diagram of another exemplary positioning tool and vehicle body assembly of this application.

[0035] Figure Labels

[0036] 1: Locking handle; 2: First connecting plate; 3: First adapter block; 4: Second L-shaped seat; 5: Tooling base; 6: Second adapter block; 7: First clamping block; 8: Second connecting plate; 9: Second clamping block; 10: First support block; 11: Main positioning pin; 12: Third adapter block; 13: Positioning surface; 14: Secondary positioning pin; 15: Fourth adapter block; 16: Third clamping block; 17: Fifth adapter block; 18: Sixth adapter block; 19: First connecting block; 20: Second operating handle; 21: Second connecting block; 22: First operating handle; 23: Eighth adapter block; 24: Second support block; 25: First fulcrum seat; 26: Limit block; 27: Ninth adapter block; 28: Third support block; 29: Tenth adapter block; 30: Eleventh adapter block; 31: Auxiliary handle. Detailed Implementation

[0037] Unless otherwise defined, all technical and / or scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should be understood that certain features of the invention (described in the context of separate embodiments for clarity) may also be provided in a single embodiment. Conversely, multiple features of the invention (described in the context of a single embodiment for brevity) may also be provided separately or in any suitable combination or, where appropriate, in any other described embodiment of the invention. Certain features described in the context of various embodiments will not be considered essential features of those embodiments unless the embodiment is inoperable without those elements. The invention is further illustrated below by specific examples; however, it should be noted that the specific process conditions and results described in the embodiments of the invention are merely illustrative and should not be construed as limiting the scope of protection of the invention. All equivalent changes or modifications made in accordance with the spirit and essence of the invention should be covered within the scope of protection of the invention.

[0038] As shown in Figures 1 to 6, this application provides a door assembly positioning fixture, including a fixture base 5, a positioning reference component, a support component, a limiting component, and a clamping component. The positioning reference component is fixedly installed on the fixture base 5 and is used to cooperate with the positioning structure of the vehicle side panel to position and install the fixture base 5 onto the vehicle side panel. The support component is fixedly installed on the fixture base 5, and its support surface is used to support the door hinge from the Z direction. The limiting component and the clamping component are both connected to the corresponding operating handles through independent lever mechanisms and are movably disposed on the fixture base 5. The limiting component is provided with a limiting surface for abutting the door from the X direction, and the clamping component is provided with a clamping surface for clamping the door from the Y direction. The support surface, limiting surface, and clamping surface are configured to jointly position and fix the door in the X, Y, and Z directions, and the lever mechanisms are all driven manually through the operating handles.

[0039] Furthermore, as shown in Figures 1 and 4, the tooling base 5 of this application has extremely high rigidity and stability, ensuring that it does not deform under stress, thereby guaranteeing positioning accuracy. In addition, the tooling base 5 is provided with a large number of holes and connecting surfaces for installing other components, providing a stable mounting foundation and precise spatial positional relationships for the integration of positioning reference components, support components, limiting components and clamping components.

[0040] Furthermore, the positioning reference components include a main positioning pin 11 and a secondary positioning pin 14. Both the main positioning pin 11 and the secondary positioning pin 14 are mounted on the tooling base 5 via corresponding adapter blocks. The secondary positioning pin 14 has a positioning surface 13 machined on it. The adapter block corresponding to the main positioning pin 11 is a third adapter block 12, and the adapter block corresponding to the secondary positioning pin 14 is a fourth adapter block 15. In this application, the main positioning pin 11 and the secondary positioning pin 14 are mounted via the third adapter block 12 and the fourth adapter block 15, respectively, to allow for fine-tuning or adaptation to different vehicle models / hole positions, thereby ensuring that the positioning pins can be accurately inserted into the body hole positions. When the main positioning pin 11 and the secondary positioning pin 14 are inserted into the corresponding positioning holes on the side panel of the vehicle body, the absolute position of the tooling base 5 on the vehicle body, i.e., in the X and Y directions, can be determined, thereby establishing a positioning reference and preventing the positioning tooling from translating or rotating. In addition, the positioning surface 13 machined on the secondary positioning pin 14 can be used to restrict the movement of the tooling in the Z direction, thereby achieving a more stable and precise constraint.

[0041] Furthermore, this application also includes a base locking mechanism, which includes a locking handle 1 rotatably mounted on the tooling base 5, and a locking transmission assembly connected between the locking handle 1 and the tooling base 5; by operating the locking handle 1, the tooling base 5, which has been positioned by the positioning reference component, is pressed against the vehicle side panel. The locking transmission assembly includes a first connecting plate 2, a second connecting plate 8, a first adapter block 3, a second adapter block 6, a second L-shaped seat 4, a first pressing block 7, and a second pressing block 9. Further, the first pressing block 7 and the second pressing block 9 are connected to the tooling base 5 via the first connecting plate 2, the second connecting plate 8, the locking handle 1, the first adapter block 3, the second adapter block 6, and the second L-shaped seat 4. This application utilizes the lever principle to amplify the small force applied by the operator to the locking handle 1 into a larger clamping force of the first pressing block 7 and the second pressing block 9 on the vehicle side panel, ensuring that the tooling base 5 does not loosen during assembly. The positioning reference component and the base locking mechanism of this application cooperate with each other. Specifically, firstly, the main positioning pin 11 and the auxiliary positioning pin 14 are inserted into the corresponding positioning holes of the vehicle body side panel. At this time, the position of the tooling base 5 in the X and Y directions has been accurately determined. After the positioning pins are inserted into place, the locking handle 1 is operated to press the first clamping block 7 and the second clamping block 9 downward to press against the surface of the vehicle body side panel, ensuring that the tooling base 5 is fixed to the vehicle body in the Z direction. This prevents the tooling from undergoing slight displacement during subsequent door assembly, bolt tightening, and other processes, thereby ensuring the final assembly accuracy.

[0042] Furthermore, this application also includes a first support block 10, which is directly mounted on the tooling base 5. Its position corresponds to the lower part of the vehicle body side panel. Through contact with the lower part of the vehicle body, it provides a stable support point for the tooling and prevents the tooling from tilting or sinking during installation or operation. Moreover, the first support block 10 works together with the main locating pin 11 and the secondary locating pin 14 to ensure that the tooling is installed in the correct position on the vehicle body.

[0043] Further, as shown in Figures 1 to 3, the support component includes multiple support blocks, which are mounted on the tooling base 5 via corresponding adapter blocks. The positions of the support blocks correspond to the installation positions of the door hinges, and the support surfaces are provided on the support blocks. Specifically, the support component includes a third support block 28, located at the lower part of the tooling base 5, directly facing the door hinge area. It has a machined support surface for direct contact with the door and is connected to the tooling base 5 via a tenth adapter block 29. It also includes a second support block 24, located on the other side of the tooling base 5, also having a support surface for supporting the other side of the door hinge. It is directly mounted on the tooling base 5. The second and third support blocks 24 and 28 form a bracket structure in space, working together to support the door hinge area. Furthermore, the support surfaces of the second and third support blocks 24 directly abut against the lower surface of the door hinge, ensuring accurate Z-axis height positioning of the door during installation, thereby ensuring uniform gaps between the door and the vehicle sill and side panel. Furthermore, this application can prevent the car door from sinking through the second support block 24 and the third support block 28.

[0044] Furthermore, the lever mechanism of this application includes a first manual lever mechanism for driving the limiting component and a second manual lever mechanism for driving the clamping component. The first manual lever mechanism includes a first operating handle 22, a first fulcrum 25, and a first transmission component; the first fulcrum 25 is fixed to the tooling base 5 by bolts, and the first operating handle 22 is rotatably mounted on the first fulcrum 25; the first transmission component is connected between the first operating handle 22 and the limiting component to convert the rotation of the first operating handle 22 into the movement of the limiting component along the X direction, wherein the first fulcrum 25 is an L-shaped support. The first transmission component of this application includes a ninth transition block 27, one end of which is rigidly connected to the limiting component, i.e., the limiting block 26, and the other end is hinged to an eighth transition block 23; the eighth transition block 23 serves as an intermediate connecting rod, and the other end is hinged to the first operating handle 22. The limiting surface of this application is provided on the limiting block 26. Furthermore, the operator can rotate the first operating handle 22 around the fulcrum of the first fulcrum seat 25, causing the first transmission component to move, thereby driving the limiting block 26 to move along the X direction. This achieves efficient and labor-saving X-axis positioning operation, enabling rapid locking and releasing, thus improving the assembly cycle time. In addition, the first manual lever mechanism of this application is a purely mechanical mechanism. Each time the first operating handle 22 is moved to a specific position, the limiting block 26 will reach the same position and apply a basically consistent clamping force, thereby ensuring the positioning accuracy and consistency of each assembly.

[0045] Furthermore, the second manual lever mechanism includes a second operating handle 20 and a second transmission component; the second operating handle 20 is rotatably mounted on the tooling base 5; the second transmission component is connected between the second operating handle 20 and the pressing component to convert the rotation of the second operating handle 20 into the movement of the pressing component along the Y direction, wherein the second transmission component includes a plurality of transition blocks and connecting blocks that are hinged in sequence. Further still, the second transmission component of this application includes a fifth transition block 17, a sixth transition block 18, a first connecting block 19, a second connecting block 21, and a third pressing block 16. When the operator pulls the second operating handle 20, through the linkage of the fifth transition block 17, the sixth transition block 18, the first connecting block 19, and the second connecting block 21, the third pressing block 16 will move inward / outward. This movement directly acts on the Y direction of the door, thereby pressing the door tightly against the side panel of the vehicle body, eliminating the gap between the door and the vehicle body, and ensuring the accurate position of the door in the Y direction.

[0046] Furthermore, this application also includes an auxiliary handle 31, which is directly mounted on the tooling base 5. In addition, this application uses an eleventh adapter block 30 to increase the rigidity of the connection between the auxiliary handle 31 and the tooling base 5, so as to prevent the connection from loosening or breaking due to frequent operation.

[0047] Furthermore, the positioning fixture of this application is made of aluminum alloy, which has a strong overall quality, is easy to install manually, occupies little space, and is easy to operate.

[0048] Furthermore, the specific steps for assembling the vehicle door according to this application are as follows:

[0049] 1) The operator places the positioning fixture on the side panel of the body-in-white using the auxiliary handle 31, and uses the main positioning pin 11 and the secondary positioning pin 14 to engage the fixture base 5 with the positioning hole on the side panel of the body to achieve the initial positioning of the fixture on the body; the operator pulls the locking handle 1 to firmly fix the fixture base 5 on the side panel of the body-in-white to prevent the fixture from shifting during subsequent operations, and to provide a stable positioning reference for the door assembly.

[0050] 2) Place the car door on the fixture, ensuring that the lower part of the door hinge is tightly against the second support block 24 and the third support block 28. At this time, the door hinge hole is aligned with the hinge hole of the vehicle body side panel in the Z direction. Adjust the limiting block 26 using the first operating handle 22 to make the car door fit against the vehicle body side panel in the X direction, eliminating gaps and ensuring accurate X-direction positioning. Use the second operating handle 20 to drive the third pressing block 16 to move via the second transmission component, pressing the outer door panel tightly against the vehicle body side panel, eliminating gaps and ensuring accurate Y-direction positioning of the car door. Tighten the hinge bolts to fix the car door to the vehicle body.

[0051] 3) After the bolts are tightened, the second operating handle 20 can be opened in the reverse direction to loosen the Y-axis clamping component; at the same time, the locking handle 1 can be opened in the reverse direction to loosen the base locking mechanism, thereby releasing the locking between the tooling base 5 and the vehicle body. The operator holds the auxiliary handle 31 to remove the tooling from the vehicle body and place it on the welding adjustment line fixture rack for use after the next vehicle arrives.

[0052] Furthermore, the positioning fixture of this application has advantages such as good operability, quick assembly, lightweight and easy operation, and safety and reliability. It can be used as a supplementary solution for automated door assembly, and can be used during vehicle model debugging and when automated doors malfunction, to ensure normal production line operation.

[0053] Furthermore, the positioning method and door assembly strategy of this application can be extended to other vehicle model R&D projects that require manual door assembly, which can effectively advance the door matching and debugging time point and is not constrained by production line construction, water, electricity and gas environment.

[0054] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A door assembly and positioning fixture, characterized in that, The device includes a tooling base (5), a positioning reference component, a support component, a limiting component, and a pressing component. The positioning reference component is fixedly installed on the tooling base (5) and is used to cooperate with the positioning structure of the vehicle side panel to position and install the tooling base (5) onto the vehicle side panel. The support component is fixedly installed on the tooling base (5), and its support surface is used to support the door hinge from the Z direction. The limiting component and the pressing component are both connected to the corresponding operating handles through independent lever mechanisms and are respectively movably arranged on the tooling base (5). The limiting component is provided with a limiting surface for abutting the door from the X direction, and the pressing component is provided with a pressing surface for pressing the door from the Y direction. The support surface, the limiting surface, and the pressing surface are configured to jointly position and fix the door in the X, Y, and Z directions, and the lever mechanisms are all driven by human power through the operating handles.

2. The positioning fixture according to claim 1, characterized in that, The positioning reference component includes a main positioning pin (11) and a secondary positioning pin (14). The main positioning pin (11) and the secondary positioning pin (14) are both mounted on the tooling base (5) through corresponding adapter blocks, and the secondary positioning pin (14) has a positioning surface (13) machined on it.

3. The positioning fixture according to claim 1, characterized in that, The support component includes multiple support blocks, which are mounted on the tooling base (5) via corresponding adapter blocks. The position of the support block corresponds to the installation position of the door hinge, and the support surface is disposed on the support block.

4. The positioning fixture according to claim 1, characterized in that, The lever mechanism includes a first manual lever mechanism for driving the limiting component and a second manual lever mechanism for driving the clamping component.

5. The positioning fixture according to claim 4, characterized in that, The first manual lever mechanism includes a first operating handle (22), a first fulcrum (25), and a first transmission component; the first fulcrum (25) is fixed to the tooling base (5), and the first operating handle (22) is rotatably mounted on the first fulcrum (25); the first transmission component is connected between the first operating handle (22) and the limiting component to convert the rotation of the first operating handle (22) into the movement of the limiting component along the X direction.

6. The positioning fixture according to claim 4, characterized in that, The second manual lever mechanism includes a second operating handle (20) and a second transmission component; the second operating handle (20) is rotatably mounted on the tooling base (5); the second transmission component is connected between the second operating handle (20) and the clamping component to convert the rotation of the second operating handle (20) into the movement of the clamping component along the Y direction.

7. The positioning fixture according to claim 5, characterized in that, The first fulcrum (25) is an L-shaped fulcrum.

8. The positioning fixture according to claim 6, characterized in that, The second transmission component includes a plurality of transition blocks and connecting blocks that are hinged together in sequence.

9. The positioning fixture according to claim 1, characterized in that, It also includes a base locking mechanism, which includes a locking handle (1) rotatably mounted on the tooling base (5) and a locking transmission assembly connected between the locking handle (1) and the tooling base (5); by operating the locking handle (1), the tooling base (5) which has been positioned by the positioning reference component is pressed against the vehicle body side panel.

10. The positioning fixture according to claim 1, characterized in that, The positioning fixture is made of aluminum alloy.

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