Car door hinge assembly fixture

Abstract

The utility model relates to the technical field of automobile manufacturing, in particular to an automobile door hinge assembling clamp which comprises a rack, a positioning mechanism and a clamping mechanism, the positioning mechanism is installed on the rack, the clamping mechanism comprises a clamping jaw and a clamping base, the clamping jaw is connected with the clamping base, and the automobile door hinge assembling clamp further comprises a sliding compensation mechanism and an elastic pressing mechanism. The clamping base is slidably connected with the rack through the sliding compensation mechanism, one end of the elastic pressing mechanism is connected with the sliding compensation mechanism, and the other end of the elastic pressing mechanism is fixedly connected with the rack. According to the utility model, the hinge self-adaptive installation under the fluctuation of the positioning surface of the vehicle body can be realized, and the complex manual gasket increasing and decreasing compensation operation is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of automobile manufacturing, and more specifically, to a door hinge assembly fixture. Background Technology

[0002] The self-positioning installation process for car door hinges is a widely used technical solution in the automotive manufacturing field. It achieves rapid positioning and assembly of hinges and body sheet metal through integrated fixtures, and features simplified tooling structure and convenient operation.

[0003] However, in actual production, this process is limited by the manufacturing precision fluctuations of the body sheet metal positioning surfaces, revealing significant quality control challenges. Because the positioning surfaces of the body sheet metal welding assembly are prone to dimensional and positional deviations in the Y direction (perpendicular to the door plane) during overlapping and welding processes, when the positioning surface is tilted outwards, the rigid positioning structure of the fixed fixture will cause assembly gaps between the hinge mounting surface and the body sheet metal, creating a potential for misalignment. Conversely, when the positioning surface is recessed inwards, it causes interference contact between the hinge and the body sheet metal, leading to plastic deformation of the hinge during forced bolt tightening. These assembly defects directly result in misalignment of the four doors after the door assembly is installed, requiring manual adjustment of shims on the fixture to compensate for the gaps. Existing compensation methods require repeated bolt tightening, shim adjustment, and fit verification, resulting in low adjustment efficiency and poor operational consistency, severely impacting production cycle time and assembly quality stability. Especially in automated production lines, this manual intervention mode is difficult to meet the demands of high-precision, continuous production, and the empirical determination of shim compensation amounts can easily lead to secondary assembly errors.

[0004] Therefore, how to achieve adaptive installation of hinges under the fluctuation of the vehicle body positioning surface and avoid complex manual shim compensation operations has become a key technical bottleneck in improving the reliability of the door assembly process. Utility Model Content

[0005] The purpose of this utility model is to overcome the existing technology and provide a door hinge assembly fixture that can adaptively compensate for gaps based on the manufacturing error of the positioning surface of the body sheet metal, avoiding complex manual shim addition and subtraction compensation operations.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0007] A door hinge assembly fixture is provided, comprising a frame, a positioning mechanism, and a clamping mechanism. The positioning mechanism is mounted on the frame. The clamping mechanism includes a jaw and a clamping base. The jaw is connected to the clamping base. The fixture also includes a sliding compensation mechanism and an elastic pressing mechanism. The clamping base is slidably connected to the frame through the sliding compensation mechanism. One end of the elastic pressing mechanism is connected to the sliding compensation mechanism, and the other end is fixedly connected to the frame.

[0008] In the operation of the above scheme, the frame serves as the basic load-bearing structure, providing an installation reference for the positioning and clamping mechanisms. The positioning mechanism achieves initial fixture positioning by contacting the preset positioning surface of the body sheet metal through rigid constraints. The clamping mechanism clamps and fixes the door hinge on the clamping base using grippers. When the positioning surface of the body sheet metal shifts in the Y direction due to manufacturing deviations, the grippers move the door hinge to the mounting surface of the body sheet metal and make direct contact with it. Under the interaction force generated by the contact, the sliding compensation mechanism causes the clamping base to move adaptively in the Y direction through its sliding pair, ensuring that the clamped hinge remains in contact with the mounting surface of the body sheet metal in real time. During this process, the elastic clamping mechanism applies a dynamic clamping force to the clamping base through a preset elastic force, allowing the clamping base to float freely in the Y direction to compensate for the positioning surface deviation, while also eliminating the assembly gap between the hinge and the body through elastic constraints. When the bolts tighten the hinge, the elastic clamping mechanism continuously counteracts external force disturbances, ensuring that the hinge is tightly fitted to the body in a state without rigid interference, thereby preventing hinge deformation. Throughout the process, the synergistic effect of the sliding compensation mechanism and the elastic clamping mechanism enables automatic tolerance of the hinge installation position to the fluctuation of the body sheet metal positioning surface, ensuring assembly accuracy without relying on manual adjustment of shims.

[0009] Furthermore, the elastic clamping mechanism includes a push rod, an elastic element, and a connecting element. The connecting element is connected to the frame, and its other end is slidably connected to one end of the push rod. The other end of the push rod abuts against the surface of the clamping base. The two ends of the elastic element are respectively connected to the push rod and the connecting element. The elastic element is a spring, which is always kept in a compressed state when installed on the push rod. The spring is fitted on the push rod and dynamically clamps the clamping base through elastic force.

[0010] Furthermore, an abutment ring is provided at one end of the push rod near the clamping base, and the elastic element is connected to the abutment ring; the push rod needs to transmit the spring force to the clamping base, so the abutment plate that is supported by force on the push rod contacts the elastic element.

[0011] Furthermore, the connector is provided with a sliding hole, and a limiting ring is provided at the end of the push rod away from the clamping base. The push rod passes through the sliding hole, and the limiting ring abuts against the side of the connector away from the clamping base. The push rod and the connector are slidably connected. The limiting ring on the push rod abuts against the connector to prevent the entire push rod from being pushed out of the connector by the elastic force of the elastic element under the action of the abutting ring when the clamping base is removed during maintenance.

[0012] Furthermore, it also includes an end-position limiting mechanism, which is located on the side of the clamping base away from the push rod and is used to limit the clamping base from detaching from the frame. The end-position limiting mechanism is fixedly connected to the connector or the frame. The function of the end-position limiting mechanism is twofold: first, to limit the extreme sliding position of the sliding compensation mechanism, preventing the first sliding member and the second sliding member from sliding excessively in the Y direction and disengaging from each other, causing the clamping base to fall off; second, to keep the elastic member of the elastic pressing mechanism in an initial state of elastic compression. The distance between the positioning reference surface of the positioning mechanism and the end face of the door hinge is set very small. During docking, the door hinge directly contacts the body sheet metal mounting surface. The body sheet metal pushes the door hinge, and the first sliding member of the sliding mechanism slides away from the body sheet metal. The clamping base disengages from the end-position limiting mechanism and gradually moves away from it. The elastic member is further compressed, the elastic force increases, and there is a greater pressing and fitting force between the door hinge and the body sheet metal mounting surface.

[0013] Furthermore, the end-position limiting mechanism includes a mounting plate and a limiting post. The mounting plate is fixedly connected to the connector. One end of the limiting post is threadedly connected to the mounting plate, and the other end abuts against the clamping base. In the initial state, one end of the limiting post is against the clamping base, while the other end is threadedly connected to the mounting plate. Engineers can rotate the limiting post to adjust the limit sliding position of the sliding compensation mechanism according to the actual assembly situation.

[0014] Furthermore, the sliding compensation mechanism includes a first sliding member and a second sliding member. The first sliding member is fixedly connected to the clamping base, and the second sliding member is fixedly connected to the connecting member. The first sliding member is provided with a sliding groove, and the second sliding member is provided with a sliding protrusion. The second sliding member and the second sliding member are slidably connected to the sliding block through the sliding groove. The sliding compensation mechanism adopts a sliding form in which the groove and protrusion of the first and second sliding members cooperate to restrict the movement of the clamping base in the X direction (along the length direction of the vehicle body sheet metal).

[0015] Furthermore, the sliding groove side of the first sliding member is provided with a recessed portion, and the sliding protrusion side of the second sliding member is provided with a protruding portion, the protruding portion being connected to the recessed portion; the simple sliding form of the first and second sliding members with groove and protrusion cooperation has no limit in the Z direction of the body sheet metal (along the height direction of the body sheet metal). When the clamping base is slidably connected to the second sliding member on the frame through the first sliding member, the clamping base is prone to sliding off in the Z direction due to external force during the movement of the clamp, causing the entire clamping mechanism to detach from the frame. Therefore, the connection between the protruding portion and the recessed portion is provided to restrict the first sliding member from sliding off the second sliding member in the Z-axis direction, thereby restricting the clamping mechanism to prevent it from detaching from the frame.

[0016] Furthermore, the positioning mechanism includes a cylinder and a positioning gripper. The cylinder is connected to the positioning gripper and drives the positioning gripper to perform a clamping action. During positioning, the positioning mechanism achieves the basic function of positioning by pneumatically controlling the positioning gripper to clamp the flange edge of the body sheet metal door opening.

[0017] Furthermore, the clamping mechanism also includes a valve, which is mounted on the clamping base and is used to connect to an external pneumatic device. The door hinge is manually clamped onto the clamping jaws, and then the external starting device is activated to clamp the door hinge through the valve.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] 1. The clamping base is slidably connected to the frame through a sliding compensation mechanism. One end of the elastic pressing mechanism is connected to the sliding compensation mechanism, and the other end is fixedly connected to the frame. The sliding compensation mechanism enables the clamping base to move adaptively in the Y direction through its sliding pair. The elastic pressing mechanism applies a dynamic pressing force to the clamping base through a preset elastic force, eliminating the need to manually add or remove shims to compensate for the gap, thus effectively improving the reliability of the door assembly.

[0020] 2. The end-limiting mechanism is installed on the side of the sliding compensation mechanism away from the elastic clamping mechanism, which effectively prevents the first sliding member and the second sliding member from sliding excessively in the Y direction and disengaging from each other, causing the clamping base to fall off. Attached Figure Description

[0021] Figure 1 A perspective view of a door hinge assembly fixture;

[0022] Figure 2 A perspective view of the frame, positioning mechanism, and clamping mechanism of a car door hinge assembly fixture;

[0023] Figure 3 for Figure 2 A magnified view of a section at point A in the middle;

[0024] Figure 4 A schematic diagram of a sliding compensation mechanism, a clamping mechanism and an end-limiting mechanism for a car door hinge assembly fixture;

[0025] Figure 5 This is a schematic diagram of the structure of a first sliding member, a second sliding member, and a connecting member of a car door hinge assembly fixture.

[0026] In the attached diagram: 100, frame; 200, positioning mechanism; 210, cylinder; 220, positioning gripper; 300, clamping mechanism; 310, gripper; 320, clamping base; 330, valve; 400, sliding compensation mechanism; 410, first sliding member; 411, recess; 420, second sliding member; 421, protrusion; 500, elastic pressing mechanism; 510, push rod; 511, abutment ring; 512, limiting ring; 520, elastic member; 530, connecting member; 531, sliding hole; 600, end limiting mechanism; 610, mounting plate; 620, limiting post; 700, door hinge. Detailed Implementation

[0027] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0028] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0029] Example 1

[0030] This embodiment is a first embodiment of a door hinge assembly fixture, such as... Figures 1 to 5 As shown, the device includes a frame 100, a positioning mechanism 200, and a clamping mechanism 300. The positioning mechanism 200 is mounted on the frame 100. The clamping mechanism 300 includes a gripper 310 and a clamping base 320. The gripper 310 is connected to the clamping base 320. The device also includes a sliding compensation mechanism 400 and an elastic pressing mechanism 500. The clamping base 320 is slidably connected to the frame 100 through the sliding compensation mechanism 400. One end of the elastic pressing mechanism 500 is connected to the sliding compensation mechanism 400, and the other end is fixedly connected to the frame 100.

[0031] Specifically, the elastic clamping mechanism 500 includes a push rod 510, an elastic element 520, and a connecting element 530. The connecting element 530 is connected to the frame 100, and its other end is slidably connected to one end of the push rod 510. The other end of the push rod 510 abuts against the surface of the clamping base 320. The two ends of the elastic element 520 are respectively connected to the push rod 510 and the connecting element 530. The elastic element 520 is a spring. When the spring is installed on the push rod 510, it is always kept in a compressed state. The spring is fitted on the push rod 510 and dynamically clamps the clamping base 320 through elastic force.

[0032] Specifically, the sliding compensation mechanism 400 includes a first sliding member 410 and a second sliding member 420. The first sliding member 410 is fixedly connected to the clamping base 320, and the second sliding member 420 is fixedly connected to the connecting member 530. The first sliding member 410 is provided with a sliding groove, and the second sliding member 420 is provided with a sliding protrusion. The second sliding members 420 are slidably connected to the sliding block through the sliding groove. The sliding compensation mechanism 400 adopts a sliding form in which the groove and protrusion of the first sliding member 410 and the second sliding member 420 cooperate to slide. The cooperation of the sliding groove and the protrusion can restrict the movement of the clamping base 320 in the X direction (along the length direction of the body sheet metal).

[0033] Specifically, the sliding groove side of the first sliding member 410 is provided with a recessed portion 411, and the sliding protrusion side of the second sliding member 420 is provided with a protruding portion 421, which is connected to the recessed portion 411. The simple sliding form of the groove and protrusion of the first sliding member 410 and the second sliding member 420 has no limit in the Z direction of the body sheet metal (along the height direction of the body sheet metal). When the clamping base 320 is slidably connected to the second sliding member 420 on the frame 100 through the first sliding member 410, the clamping base 320 is easy to slide off in the Z direction due to external force during the movement of the clamp, causing the entire clamping mechanism 300 to detach from the frame 100. Therefore, the connection between the protruding portion 421 and the recessed portion 411 is provided to restrict the first sliding member 410 from sliding off the second sliding member 420 in the Z axis direction, thereby restricting the clamping mechanism 300 to prevent it from detaching from the frame 100.

[0034] The working principle of a door hinge assembly fixture in this embodiment is as follows:

[0035] The clamping mechanism 300 first grips the door hinge 700 on the clamping base 320 using the gripper 310. The external hanger is then operated to move the entire clamp. After moving a certain distance, because the distance between the positioning reference surface of the positioning mechanism 200 and the end face of the door hinge 700 is set very small, when the positioning mechanism 200 positions the clamp on the body sheet metal, the door hinge 700 directly contacts the body sheet metal mounting surface. The body sheet metal adaptively pushes the door hinge 700 away from the body sheet metal in the Y direction until they do not cross or interfere with each other. Under the elastic force of the elastic pressing mechanism 500, the door hinge 700 and the body sheet metal mounting surface are kept completely fitted.

[0036] The beneficial effects of this embodiment are as follows: the sliding compensation mechanism 400 causes the clamping base 320 to move adaptively in the Y direction through the mutual sliding of its first sliding member 410 and second sliding member 420. The elastic pressing mechanism 500 applies a dynamic pressing force to the clamping base 320 through the preset elastic force of the push rod 510 and the elastic member 520. During the entire installation process of the door hinge 700, even if the positioning surface has inward or outward shape deviation, the door hinge 700 will not interfere with the body sheet metal or fail to fit, which would cause the door hinge 700 to undergo plastic deformation when bolts are subsequently driven into the door hinge 700. There is no need to rely on manually adding or removing shims to compensate for the gap, which effectively improves the reliability of the door assembly.

[0037] Example 2

[0038] This embodiment is a first embodiment of a door hinge assembly fixture, such as... Figure 3 and 4 As shown, the difference from Embodiment 1 is as follows:

[0039] Specifically, an abutment ring 511 is provided at one end of the push rod 510 near the clamping base 320, and the elastic element 520 is connected to the abutment ring 511; the push rod 510 needs to transmit the spring force to the clamping base 320, so the abutment plate that is supported by force on the push rod 510 contacts the elastic element 520.

[0040] Specifically, the connector 530 is provided with a sliding hole 531, and the end of the push rod 510 away from the clamping base 320 is provided with a limiting ring 512. The push rod 510 passes through the sliding hole 531, and the limiting ring 512 abuts against the side of the connector 530 away from the clamping base 320. The push rod 510 is slidably connected to the connector 530. The limiting ring 512 on the push rod 510 abuts against the connector 530 to prevent the entire push rod 510 from being pushed out of the connector 530 by the elastic force of the elastic member 520 acting on the abutting ring 511 when the clamping base 320 is removed during maintenance.

[0041] Specifically, it also includes an end-position limiting mechanism 600. The end-position limiting mechanism 600 is located on the side of the clamping base 320 away from the push rod 510 and is used to limit the clamping base 320 from detaching from the frame 100. The end-position limiting mechanism 600 is fixedly connected to the connector 530 or the frame 100. The functions of the end-position limiting mechanism 600 are twofold: first, to limit the extreme sliding position of the sliding compensation mechanism 400, preventing the first sliding member 410 and the second sliding member 420 from sliding excessively in the Y direction and disengaging from each other, causing the clamping base 320 to fall; and second, to maintain the elasticity of the elastic pressing mechanism 500. The initial state of 20 is a compressed state with elasticity. The distance between the positioning reference surface of the positioning mechanism 200 and the end face of the door hinge 700 is set very small. When docking, the door hinge 700 directly contacts the body sheet metal mounting surface. The body sheet metal pushes the door hinge 700, and the first sliding member 410 of the sliding mechanism slides away from the body sheet metal. The clamping base 320 disengages from the end limiting mechanism 600 and gradually moves away. The elastic member 520 is further compressed, the elasticity increases, and there is a greater pressing and fitting force between the door hinge 700 and the body sheet metal mounting surface.

[0042] Specifically, the end-position limiting mechanism 600 includes a mounting plate 610 and a limiting post 620. The mounting plate 610 is fixedly connected to the connector 530. One end of the limiting post 620 is threadedly connected to the mounting plate 610, and the other end abuts against the clamping base 320. In the initial state, one end of the limiting post 620 is against the clamping base 320, while the other end is threadedly connected to the mounting plate 610. Engineers can rotate the limiting post 620 according to the actual assembly situation to adjust the limit sliding position of the sliding compensation mechanism 400.

[0043] The working principle of a door hinge assembly fixture in this embodiment is as follows:

[0044] Before assembling the door hinge 700, the engineer first rotates the limiting post 620 to adjust the sliding limit position of the first sliding member 410. After the adjustment is completed, the door hinge 700 is directly connected to the body sheet metal mounting surface. When the two are in contact, the body sheet metal pushes the door hinge 700, and the clamping base 320 follows the first sliding member 410 to slide adaptively on the second sliding member 420. The push rod 510 is pushed away from the body sheet metal and remains in contact with the clamping base 320. The clamping base 320 disengages from the limiting post 620, and the elastic member 520 provides elastic force to press the clamping base 320, thereby pressing the door hinge 700 onto the body sheet metal mounting surface.

[0045] The beneficial effects of this embodiment are: the end limiting mechanism 600, together with the elastic pressing mechanism 500, maintains a pressing force between the door hinge 700 and the body sheet metal mounting surface to ensure that the two are completely and tightly fitted, reducing the possibility of a slight gap between the door hinge 700 and the body sheet metal mounting surface, and improving the stability of the door hinge 700 installation.

[0046] Example 3

[0047] This embodiment is a first embodiment of a door hinge assembly fixture, such as... Figure 1 and 2 As shown, the difference from Embodiment 1 is that the positioning mechanism 200 includes a cylinder 210 and a positioning gripper 220. The cylinder 210 is connected to the positioning gripper 220 and drives the positioning gripper 220 to perform a clamping action. When positioning, the positioning mechanism 200 achieves the basic function of positioning by pneumatically controlling the positioning gripper 220 to clamp the flange edge of the body sheet metal door opening.

[0048] Specifically, the clamping mechanism 300 also includes a valve 330, which is mounted on the clamping base 320 and is used to connect to external pneumatic equipment. The door hinge 700 is placed on the gripper 310 by the operator, and then the external starting equipment is started to clamp the door hinge 700 through the valve 330.

[0049] The working principle of a door hinge assembly fixture in this embodiment is as follows:

[0050] The engineer places the door hinge 700 on the gripper 310 of the clamping mechanism 300 and starts the external pneumatic equipment to clamp the door hinge 700. The entire fixture can then be moved onto the body sheet metal for positioning. When the fixture is positioned, the cylinder 210 drives the positioning gripper 220 to clamp the door flange edge of the body sheet metal to achieve positioning.

[0051] The beneficial effects of this embodiment are: both the positioning gripper 220 and the gripper 310 of the clamping mechanism 300 adopt pneumatic clamping, which has a fast response speed, low maintenance cost, and is also easy to control direction.

[0052] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0053] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A door hinge assembly fixture, comprising a frame (100), a positioning mechanism (200), and a clamping mechanism (300), wherein the positioning mechanism (200) is mounted on the frame (100), and the clamping mechanism (300) comprises a jaw (310) and a clamping base (320), wherein the jaw (310) is connected to the clamping base (320), characterized in that, It also includes a sliding compensation mechanism (400) and an elastic pressing mechanism (500). The clamping base (320) is slidably connected to the frame (100) through the sliding compensation mechanism (400). One end of the elastic pressing mechanism (500) is connected to the sliding compensation mechanism (400), and the other end is fixedly connected to the frame (100).

2. The door hinge assembly fixture according to claim 1, characterized in that, The elastic clamping mechanism (500) includes a push rod (510), an elastic element (520), and a connecting member (530). The connecting member (530) is connected to the frame (100), and its other end is slidably connected to one end of the push rod (510). The other end of the push rod (510) abuts against the surface of the clamping base (320). The two ends of the elastic element (520) are respectively connected to the push rod (510) and the connecting member (530).

3. A door hinge assembly fixture according to claim 2, characterized in that, The push rod (510) is provided with an abutment ring (511) at one end near the clamping base (320), and the elastic element (520) is connected to the abutment ring (511).

4. A door hinge assembly fixture according to claim 3, characterized in that, The connector (530) is provided with a sliding hole (531), and a limiting ring (512) is provided at the end of the push rod (510) away from the clamping base (320). The push rod (510) passes through the sliding hole (531), and the limiting ring (512) abuts against the side of the connector (530) away from the clamping base (320).

5. A door hinge assembly fixture according to any one of claims 2-4, characterized in that, It also includes an end-position limiting mechanism (600), which is located on the side of the clamping base (320) away from the push rod (510) and is used to limit the clamping base (320) from disengaging from the frame (100). The end-position limiting mechanism (600) is fixedly connected to the connector (530) or the frame (100).

6. A door hinge assembly fixture according to claim 5, characterized in that, The end limiting mechanism (600) includes a mounting plate (610) and a limiting post (620). The mounting plate (610) is fixedly connected to the connector (530). One end of the limiting post (620) is threadedly connected to the mounting plate (610), and the other end abuts against the clamping base (320).

7. A door hinge assembly fixture according to any one of claims 2-4, characterized in that, The sliding compensation mechanism (400) includes a first sliding member (410) and a second sliding member (420). The first sliding member (410) is fixedly connected to the clamping base (320), and the second sliding member (420) is fixedly connected to the connecting member (530). The first sliding member (410) is provided with a sliding groove, and the second sliding member (420) is provided with a sliding protrusion. The second sliding member (420) and the second sliding member (420) are slidably connected to the sliding block through the sliding groove.

8. A door hinge assembly fixture according to claim 7, characterized in that, The first slider (410) has a recessed portion (411) on the side of its sliding groove, and the second slider (420) has a protruding portion (421) on the side of its sliding protrusion. The protruding portion (421) is connected to the recessed portion (411).

9. A door hinge assembly fixture according to claim 1, characterized in that, The positioning mechanism (200) includes a cylinder (210) and a positioning gripper (220). The cylinder (210) is connected to the positioning gripper (220) and drives the positioning gripper (220) to perform a clamping action.

10. A door hinge assembly fixture according to claim 1, characterized in that, The clamping mechanism (300) further includes a valve (330) mounted on the clamping base (320) and used to connect to external pneumatic equipment.

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