Gauge for automobile engine hood assembly

Abstract

The utility model provides a kind of gauge for automobile engine cover assembly, including workbench, profiling mechanism, initial positioning mechanism, fine positioning mechanism, locking mechanism, controller and pass gauge;Profiling mechanism includes multiple profiling units, multiple profiling units are set on workbench along the outer edge contour of the engine cover assembly to be detected, and detection gap is formed between profiling unit and the outer edge contour of the engine cover assembly;Initial positioning mechanism is used for positioning engine cover assembly;Fine positioning mechanism includes support unit and sensing unit, support unit is used for supporting engine cover assembly and adjusting the position of engine cover assembly, sensing unit is used for abutting with the lower surface of engine cover assembly and sensing the pressing force of the abutting part with engine cover assembly and feeding back pressure information;Locking mechanism is used for tensioning and compacting engine cover assembly;Controller is electrically connected with sensing unit, and controller displays the pressure information fed back by sensing unit;Pass gauge is used for detecting the uniformity of detection gap.

Description

Technical Field

[0001] This utility model relates to the field of automotive inspection tools, and in particular to an inspection tool for an automotive engine hood assembly. Background Technology

[0002] Currently, the quality of a car's exterior appearance generally depends on the pass rate of its body, hood, doors, and other exterior components, as well as their compatibility. The hood assembly is an external opening component of the car body. After assembly, it is required to maintain a smooth transition and uniform assembly gap with surrounding parts to ensure precise and stable installation. Therefore, during the production process, the accuracy of the outline of the hood assembly's perimeter needs to be inspected.

[0003] In existing technologies, the accuracy of the outline of the engine hood assembly is generally measured using a coordinate measuring machine (CMM).

[0004] However, coordinate measuring machine (CMM) inspection is a sampling inspection and must be carried out in a CMM inspection room. It cannot be inspected online in real time, so it cannot intuitively display the inspection results of the engine hood assembly on the production line, resulting in a low inspection frequency. In addition, CMM measurement requires relatively expensive professional equipment and professional inspection personnel training, which results in high investment costs. Utility Model Content

[0005] The purpose of this utility model is to provide a tooling for inspecting automobile engine hood assemblies, which aims to solve or at least partially solve the shortcomings of the above-mentioned background technology. It can perform real-time inspection of engine hood assemblies on the production line and display the inspection results intuitively and quickly. It not only has high inspection efficiency and high inspection accuracy, but also low investment cost.

[0006] This utility model provides a tooling for inspecting an automobile engine hood assembly, including a worktable, a copying mechanism, a preliminary positioning mechanism, a fine positioning mechanism, a locking mechanism, a controller, and a go / no-go gauge. The copying mechanism includes multiple copying units, which are arranged on the worktable along the outer contour of the engine hood assembly to be inspected, forming a detection gap between the copying units and the outer contour of the engine hood assembly. The preliminary positioning mechanism is located within an enclosed area formed by the multiple copying units, and includes at least two positioning units. Each positioning unit includes a positioning pin mounted on the worktable, which is used to position the engine hood assembly. The fine positioning mechanism is arranged on the worktable and located within the enclosed area. Within the domain, there are multiple support units and multiple sensing units. The support units are used to support the engine hood assembly and adjust its position. The sensing units are used to abut against the lower surface of the engine hood assembly and sense the downward pressure at the contact point with the engine hood assembly and provide feedback on the pressure information. A locking mechanism is set on the worktable and includes multiple first fastening units and multiple second fastening units. The first fastening units are used to tighten the engine hood assembly, and the second fastening units are used to press the engine hood assembly. A controller is electrically connected to the sensing units and displays the pressure information fed back by the sensing units. A go / no-go gauge is placed on the worktable and is used to detect the uniformity of the detection gap.

[0007] Furthermore, the profiling unit includes a profiling block mounted on a workbench, with the upper edge of the profiling block forming a detection gap with the engine hood assembly.

[0008] Furthermore, the support unit includes a fixed base mounted on the workbench, a support column movably mounted on the fixed base, and a first adjusting member that drives the support column to extend or retract from the fixed base.

[0009] Furthermore, the first adjusting component includes a fixed sleeve, a first adjusting knob rotatably disposed at one end of the fixed sleeve, a first adjusting rod movably disposed inside the fixed sleeve, and a push block. One end of the first adjusting rod is fixedly connected to the first adjusting knob, and the other end of the first adjusting rod protrudes out of the fixed sleeve and is screwed to the push block. The push block passes through the fixed seat and abuts against the support column.

[0010] Furthermore, the push block is provided with an inclined guide surface that abuts against the bottom of the support column, and the bottom of the support column is provided with a chamfered structure, with the inclined guide surface abutting against the chamfered structure.

[0011] Furthermore, the support column has a limiting hole through it in a direction perpendicular to its axis, and the fixed seat has a mating hole corresponding to the limiting hole; the support unit also includes a limiting pin, which passes through the mating hole and the limiting hole, and the limiting pin is movably connected to the limiting hole.

[0012] Furthermore, the sensing unit includes multiple pressure sensors mounted on the workbench, which can abut against the lower surface of the hood assembly. Each pressure sensor is used to sense the downward pressure on the corresponding contact surface of the hood assembly.

[0013] Furthermore, the first fastening unit includes a fixing hook for fastening the engine cover assembly and a second adjusting member for tightening or loosening the fixing hook.

[0014] Furthermore, the second adjusting component includes an adjusting frame, a second adjusting rod, and a second adjusting knob. The fixing hook and the second adjusting knob are located on opposite sides of the adjusting frame. The second adjusting rod passes through the adjusting frame, one end of the second adjusting rod is connected to the fixing hook, and the other end of the second adjusting rod is screwed to the second adjusting knob.

[0015] Furthermore, the second fastening unit includes a plurality of clamping blocks arranged around the contouring mechanism, the clamping blocks abutting against the outer surface of the engine hood assembly.

[0016] The inspection fixture for automotive engine hood assemblies provided by this utility model achieves initial positioning of the engine hood assembly by setting at least two positioning units and engaging the positioning pins with the positioning holes of the engine hood assembly. Through the cooperation of a support unit and a sensing unit, the support unit can adjust the position of the engine hood assembly specifically based on the pressure information fed back by the sensing unit, achieving precise positioning of the engine hood assembly. Through the cooperation of a first fastening unit and a second fastening unit, the engine hood assembly is fixed by tensioning and pressing to prevent loosening during inspection and changes in the inspection gap. Through the cooperation of a copying unit and a go / no-go gauge, the uniformity of the inspection gap is inspected. This method is not only simple and convenient to operate, but also provides intuitive inspection results. In summary, the inspection fixture for automotive engine hood assemblies provided by this utility model can perform real-time inspection of engine hood assemblies on the production line and display the inspection results intuitively and quickly. It not only has high inspection efficiency and high inspection accuracy, but also low investment cost. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a top view of a tool for inspecting an automobile engine cover assembly according to the present invention.

[0019] Figure 2 for Figure 1The fixture shown has a top view of the engine hood assembly.

[0020] Figure 3 This is a right view of a tool for inspecting an automobile engine cover assembly according to the present invention.

[0021] Figure 4 for Figure 3 The fixture shown has a right view of the engine hood assembly mounted on it.

[0022] Figure 5 for Figure 4 A magnified diagram of point A in the middle.

[0023] Figure 6 for Figure 1 The diagram shows the support unit and the sensing unit.

[0024] Figure 7 for Figure 6 The cross-sectional view of the support unit shown.

[0025] Figure 8 for Figure 7 A magnified diagram of point B in the middle.

[0026] Figure 9 for Figure 1 A schematic diagram of the first fastening unit is shown.

[0027] Figure 10 This is a schematic diagram of the engine cover assembly of this utility model.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 10. Workbench; 100. Inspection gap; 20. Copying unit; 201. Positioning hole; 202. Fastening hole; 203. Axis of symmetry; 21. Copying block; 22. Enclosed area; 23. Second bracket; 30. Positioning unit; 31. Positioning pin; 32. First bracket; 40. Support unit; 41. Fixed base; 411. T-shaped through hole; 4111. First through hole; 4112. Second through hole; 412. Mating hole; 42. Support column; 421. Chamfered structure; 422. Limiting hole; 43. First adjusting component; 431. Fixed sleeve; 432. First adjusting knob; 433. First adjusting rod; 434. Push block; 4341. Inclined guide surface; 44. Limit pin; 45. Third bracket; 50. Sensing unit; 51. Pressure sensor; 52. Fourth bracket; 60. First fastening unit; 61. Fixing hook; 62. Second adjusting component; 621. Adjusting frame; 622. Second adjusting rod; 623. Second adjusting knob; 63. First hinge seat; 64. First hinge component; 65. Connecting rod; 70. Second fastening unit; 71. Pressing block; 72. Second hinge seat; 73. Connecting block; 80. Controller; 81. Display screen; 90. Go / no-go gauge. Detailed Implementation

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0031] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0032] The directional terms such as "up," "down," "left," "right," "front," "back," "top," and "bottom" (if present) used in the specification and claims of this utility model are defined according to the position of the structures in the drawings and the relative positions of the structures, and are only for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this application.

[0033] Please see Figures 1-5 and Figure 10 A tooling for inspecting an automobile engine hood assembly includes a worktable 10, a copying mechanism, a preliminary positioning mechanism, a fine positioning mechanism, a locking mechanism, a controller 80, and a go / no-go gauge 90.

[0034] The copying mechanism includes multiple copying units 20, which are arranged on the worktable 10 along the outer contour of the engine hood assembly 200 to be inspected. A detection gap 100 is formed between the copying units 20 and the outer contour of the engine hood assembly 200. More specifically, the multiple copying units 20 work together to simulate the parts of the car body that mate with the engine hood assembly 200, wherein the detection gap 100 simulates the assembly gap between the parts of the car body that mate with the engine hood assembly 200.

[0035] The initial positioning mechanism is located within an enclosed area 22 formed by multiple contouring units 20. The initial positioning mechanism includes at least two positioning units 30. Each positioning unit 30 includes a positioning pin 31 mounted on the worktable 10 via a first bracket 32. The positioning pin 31 is used to position the engine hood assembly 200. In this embodiment, the initial positioning mechanism has two positioning units 30, and the engine hood assembly 200 has positioning holes 201 that mate with the positioning pins 31. More specifically, the engine hood assembly 200 has a symmetry axis 203 extending along the Y direction. The two positioning holes 201 are axially symmetrically distributed about this symmetry axis 203, and correspondingly, the two positioning pins 31 are also axially symmetrically distributed about this symmetry axis 203.

[0036] The precision positioning mechanism is set on the worktable 10 and located within the enclosed area 22. It includes multiple support units 40 and multiple sensing units 50. The support units 40 are used to support the engine hood assembly 200 and adjust the position of the engine hood assembly 200. The sensing units 50 are used to abut against the lower surface of the engine hood assembly 200 and sense the downward pressure at the abutment part of the engine hood assembly 200 and provide feedback on the pressure information.

[0037] The locking mechanism is installed on the workbench 10 and includes multiple first fastening units 60 and multiple second fastening units 70. The first fastening units 60 are used to tighten the engine cover assembly 200, and the second fastening units 70 are used to press the engine cover assembly 200.

[0038] The controller 80 is electrically connected to the sensing unit 50. The controller 80 is equipped with a display screen 81, which is used to display the pressure information fed back by the sensing unit 50.

[0039] The go / no-go gauge 90 is placed on the clamp (11) of the workbench 10. The go / no-go gauge 90 is used to check the uniformity of the test gap 100. When checking the test gap 100, the operator can pick up the go / no-go gauge 90 and use it to check the test gap 100. If the go end of the go / no-go gauge 90 can pass smoothly, but the stop end of the go / no-go gauge 90 cannot pass, then the outer edge contour of the engine cover assembly 200 is qualified; otherwise, it is unqualified.

[0040] As described above, the inspection tool for the automobile engine hood assembly provided by this utility model achieves preliminary positioning of the engine hood assembly 200 by setting at least two positioning units 30 and cooperating with the positioning pins 31 and the positioning holes 201 of the engine hood assembly 200; through the cooperation of the support unit 40 and the sensing unit 50, the support unit 40 can adjust the position of the engine hood assembly 200 in a targeted manner according to the pressure information fed back by the sensing unit 50, thereby achieving precise positioning of the engine hood assembly 200; through the cooperation of the first fastening unit 60 and the second fastening unit 70, the engine hood assembly 200 is fixed by tightening and pressing to prevent the engine hood assembly 200 from loosening during the inspection process and causing changes in the inspection gap 100; through the cooperation of the profile unit 20 and the go / no-go gauge 90, the uniformity of the inspection gap 100 is inspected, which is not only simple and convenient to operate, but also provides intuitive inspection results. In summary, the inspection fixture for the automobile engine hood assembly provided by this utility model can perform real-time inspection of the engine hood assembly 200 on the production line and display the inspection results intuitively and quickly; it not only has high inspection efficiency and high inspection accuracy, but also low investment cost.

[0041] Furthermore, the contouring unit 20 includes a contouring block 21 mounted on the worktable 10 via a second bracket 23, with the upper edge of the contouring block 21 forming a detection gap 100 between it and the engine hood assembly 200.

[0042] Please see Figure 2 and Figures 6-8 The support unit 40 includes a fixed seat 41 mounted on the workbench 10 via a third bracket 45, a support column 42 movably mounted on the fixed seat 41, and a first adjusting member 43 that drives the support column 42 to extend or retract from the fixed seat 41.

[0043] Furthermore, the first adjusting component 43 includes a fixed sleeve 431, a first adjusting knob 432 rotatably disposed at one end of the fixed sleeve 431, a first adjusting rod 433 movably disposed within the fixed sleeve 431, and a push block 434. One end of the first adjusting rod 433 is fixedly connected to the first adjusting knob 432, and the other end of the first adjusting rod 433 protrudes out of the fixed sleeve 431 and is screwed to the push block 434. The push block 434 passes through the fixed base 41 and abuts against the support column 42. The first adjusting knob 432 extends out of the outer side of the enclosed area 22 for easy operation by staff.

[0044] More specifically, the fixed base 41 has a T-shaped through hole 411, which has a first through hole 4111 and a second through hole 4112 that are interconnected. The axis of the first through hole 4111 is perpendicular to the axis of the second through hole 4112. The support column 42 is movably disposed in the first through hole 4111, and the push block 434 is movably disposed in the second through hole 4112.

[0045] By turning the first adjustment knob 432, the first adjustment rod 433 is driven to rotate. Since the first adjustment rod 433 and the push block 434 are screwed together, the rotation of the first adjustment rod 433 will cause the push block 434 to move within the second through hole 4112. The displacement of the push block 434 will cause the support column 42 to extend or retract from the first through hole 4111, thereby adjusting the distance of the support column 42 extending from the fixed seat 41 to adjust the support balance of the engine hood assembly 200.

[0046] Furthermore, the push block 434 is provided with an inclined guide surface 4341 that abuts against the bottom of the support column 42, and the bottom of the support column 42 is provided with a chamfered structure 421. When the first adjusting rod 433 drives the push block 434 to move, the inclined guide surface 4341 of the push block 434 abuts against the chamfered structure 421 of the support column 42, and the support column 42 slides relative to the inclined guide surface 4341 to extend or retract into the first through hole 4111. By providing the chamfered structure 421, the operation of the push block 434 and the support column 42 can be made smoother and more fluid, while reducing the wear of the inclined guide surface 4341.

[0047] In addition, the support column 42 has a limiting hole 422 extending through it in a direction perpendicular to its axis, wherein the cross-section of the limiting hole 422 is capsule-shaped; the fixing seat 41 has a mating hole 412 corresponding to the limiting hole 422; the support unit 40 also includes a limiting pin 44, which passes through the mating hole 412 and the limiting hole 422, and is movably connected to the limiting hole 422. Through the cooperation of the limiting pin 44, the limiting hole 422, and the mating hole 412, the support column 42 can be prevented from falling off the fixing seat 41, while not interfering with the operation of the support column 42 in the first through hole 4111.

[0048] Please see Figure 6 The sensing unit 50 includes a plurality of pressure sensors 51 mounted on the workbench 10 via a fourth bracket 52. The pressure sensors 51 can abut against the lower surface of the engine hood assembly 200. Each pressure sensor 51 is used to sense the downward pressure on the corresponding contact surface of the engine hood assembly 200.

[0049] In this embodiment, multiple pressure sensors 51 are axially symmetrically distributed about the axis of symmetry 203 of the hood assembly 200. After the hood assembly 200 is initially positioned, the support unit 40 supports the hood assembly 200. If the downward pressure sensed by two axially symmetrical pressure sensors 51 is different, it indicates that the hood assembly 200 is in an unbalanced support state and is not properly installed. At this time, it is necessary to adjust the extension distance of each support column 42 to make the hood assembly 200 tend to be balanced. The corresponding support unit 40 is adjusted according to the pressure information fed back by the pressure sensors 51. When the downward pressure sensed by two axially symmetrical pressure sensors 51 is the same, it indicates that the hood assembly 200 is in a balanced support state and is properly installed, thereby completing the fine positioning.

[0050] Please see Figure 9 The first fastening unit 60 includes a fixing hook 61 for fastening the engine hood assembly 200 and a second adjusting member 62 for tightening or loosening the fixing hook 61. The lower surface of the engine hood assembly 200 has a fastening hole 202, and the fixing hook 61 engages with the fastening hole 202.

[0051] Furthermore, the second adjusting component 62 includes an adjusting frame 621, a second adjusting rod 622, and a second adjusting knob 623. The adjusting frame 621 is fixed on the second bracket 23. The fixing hook 61 and the second adjusting knob 623 are located on opposite sides of the adjusting frame 621. The adjusting frame 621 has a through hole. The second adjusting rod 622 passes through the through hole of the adjusting frame 621. One end of the second adjusting rod 622 is connected to the fixing hook 61, and the other end of the second adjusting rod 622 is screwed to the second adjusting knob 623.

[0052] Since the second adjusting rod 622 and the second adjusting knob 623 are screwed together, by turning the second adjusting knob 623 to drive the second adjusting rod 622 to move along the through hole, the displacement of the second adjusting rod 622 will drive the fixed hook 61 to move, thereby tightening or loosening the fixed hook 61.

[0053] Furthermore, the fixing hook 61 and the second adjusting rod 622 are connected by a first hinge structure. The first hinge structure includes a first hinge seat 63 connected to the end of the second adjusting rod 622 away from the second adjusting knob 623, and a first hinge member 64 hinged to the first hinge seat 63. The first hinge member 64 is connected to the fixing hook 61 via a connecting rod 65. By providing the first hinge structure, it is convenient for workers to remove the fixing hook 61 from the fastening hole 202.

[0054] Please see Figure 3The second fastening unit 70 includes a plurality of clamping blocks 71 arranged around the contouring mechanism, and the clamping blocks 71 abut against the outer surface of the engine hood assembly 200. The clamping blocks 71 can be made of materials such as TPU or silicone, which can prevent the clamping blocks 71 from scratching the engine hood assembly 200; in this embodiment, the clamping blocks 71 are made of silicone.

[0055] Furthermore, the clamping block 71 is connected to the worktable 10 via a second hinge structure. The second hinge structure includes a second hinge seat 72 fixed on the worktable 10 and a connecting block 73 hinged to the second hinge seat 72. The connecting block 73 is connected to the clamping block 71 and is connected to the second hinge seat 72 via a fastener, thereby restricting the rotation of the connecting block 73 and enabling the clamping block 71 to press the engine hood assembly 200. By setting the second hinge structure, the clamping block 71 is rotatably mounted on the worktable 10, so that when the operator installs or removes the engine hood assembly 200, the clamping block 71 avoids the engine hood assembly 200 to prevent collisions.

[0056] The inspection tool operation procedure for the automobile engine hood assembly provided by this utility model is as follows:

[0057] (1) Preliminary positioning: The staff installs the engine cover assembly 200 on the inspection tool of the car engine cover assembly, wherein the positioning hole 201 is aligned with the positioning pin 31, and multiple support columns 42 support the engine cover assembly 200.

[0058] (2) Precision positioning: Multiple pressure sensors 51 respectively sense the downward pressure of each part of the engine hood assembly 200 and feed back the pressure information to the controller 80. The staff adjusts the extension distance of the corresponding support column 42 according to the pressure information fed back by the pressure sensor 51, so that the engine hood assembly 200 is in a supported and balanced state and installed in place, thus completing the precision positioning.

[0059] (3) Tighten the engine cover assembly: The operator hooks the fixing hook 61 into the fastening hole 202 and turns the second adjustment knob 623 to drive the second adjustment rod 622 to move, so that the fixing hook 61 tightens the engine cover assembly 200.

[0060] (4) Pressing the engine cover assembly: The operator rotates the pressing block 71 so that the pressing block 71 abuts against the surface of the engine cover assembly 200 to press the engine cover assembly 200, thereby fixing the engine cover assembly 200.

[0061] (5) Testing the uniformity of the gap: The staff can pick up the go and no-go gauge 90 and use it to test the gap 100. If the go end of the go and no-go gauge 90 can pass smoothly, but the no-go end of the go and no-go gauge 90 cannot pass, then the outer edge contour of the engine cover assembly 200 is qualified; otherwise, it is unqualified.

[0062] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A tooling for inspecting automobile engine hood assemblies, characterized in that, include: Workbench (10); The profiling mechanism includes multiple profiling units (20), which are arranged on the worktable (10) along the outer edge contour of the engine hood assembly (200) to be tested, and a detection gap (100) is formed between the profiling unit (20) and the outer edge contour of the engine hood assembly (200). The initial positioning mechanism is located within the enclosed area (22) formed by the plurality of the profiling units (20). The initial positioning mechanism includes at least two positioning units (30). The positioning unit (30) includes a positioning pin (31) mounted on the worktable (10). The positioning pin (31) is used to position the engine cover assembly (200). The precision positioning mechanism is set on the workbench (10) and located within the enclosed area (22), including multiple support units (40) and multiple sensing units (50). The support units (40) are used to support the engine hood assembly (200) and adjust the position of the engine hood assembly (200). The sensing units (50) are used to abut against the lower surface of the engine hood assembly (200) and sense the downward pressure at the abutment part of the engine hood assembly (200) and provide feedback pressure information. The locking mechanism is provided on the worktable (10) and includes a plurality of first fastening units (60) and a plurality of second fastening units (70). The first fastening units (60) are used to tighten the engine cover assembly (200), and the second fastening units (70) are used to press the engine cover assembly (200). A controller (80) is electrically connected to the sensing unit (50), and the controller (80) displays the pressure information fed back by the sensing unit (50); A go / no-go gauge (90) is placed on the workbench (10) and is used to detect the uniformity of the detection gap (100).

2. The inspection fixture for the automobile engine hood assembly as described in claim 1, characterized in that, The profiling unit (20) includes a profiling block (21) mounted on the workbench (10), and the upper edge of the profiling block (21) forms the detection gap (100) between it and the engine cover assembly (200).

3. The inspection fixture for the automobile engine hood assembly as described in claim 1, characterized in that, The support unit (40) includes a fixed seat (41) mounted on the workbench (10), a support column (42) movably mounted on the fixed seat (41), and a first adjusting member (43) that drives the support column (42) to extend or retract from the fixed seat (41).

4. The inspection fixture for the automobile engine hood assembly as described in claim 3, characterized in that, The first adjusting component (43) includes a fixed sleeve (431), a first adjusting knob (432) rotatably disposed at one end of the fixed sleeve (431), a first adjusting rod (433) movably disposed inside the fixed sleeve (431), and a push block (434). One end of the first adjusting rod (433) is fixedly connected to the first adjusting knob (432), and the other end of the first adjusting rod (433) protrudes out of the fixed sleeve (431) and is screwed to the push block (434). The push block (434) passes through the fixed seat (41) and abuts against the support column (42).

5. The inspection fixture for the automobile engine hood assembly as described in claim 4, characterized in that, The push block (434) is provided with an inclined guide surface (4341) that abuts against the bottom of the support column (42), and the bottom of the support column (42) is provided with a chamfer structure (421), and the inclined guide surface (4341) abuts against the chamfer structure (421).

6. The inspection fixture for the automobile engine hood assembly as described in claim 3, characterized in that, The support column (42) has a limiting hole (422) through it in a direction perpendicular to its axis. The fixed seat (41) has a mating hole (412) corresponding to the limiting hole (422). The support unit (40) also includes a limiting pin (44), which passes through the mating hole (412) and the limiting hole (422). The limiting pin (44) is movably connected to the limiting hole (422).

7. The inspection fixture for the automobile engine hood assembly as described in claim 1, characterized in that, The sensing unit (50) includes a plurality of pressure sensors (51) mounted on the workbench (10). The pressure sensors (51) can abut against the lower surface of the engine cover assembly (200). Each pressure sensor (51) is used to sense the downward pressure of the corresponding contact surface of the engine cover assembly (200).

8. The inspection fixture for the automobile engine hood assembly as described in claim 1, characterized in that, The first fastening unit (60) includes a fixing hook (61) for hooking the engine cover assembly (200) and a second adjusting member (62) for tightening or loosening the fixing hook (61).

9. The inspection fixture for the automobile engine hood assembly as described in claim 8, characterized in that, The second adjusting component (62) includes an adjusting frame (621), a second adjusting rod (622), and a second adjusting knob (623). The fixing hook (61) and the second adjusting knob (623) are located on opposite sides of the adjusting frame (621). The second adjusting rod (622) passes through the adjusting frame (621). One end of the second adjusting rod (622) is connected to the fixing hook (61), and the other end of the second adjusting rod (622) is screwed to the second adjusting knob (623).

10. The inspection fixture for the automobile engine hood assembly as described in claim 1, characterized in that, The second fastening unit (70) includes a plurality of clamping blocks (71) arranged around the contouring mechanism, the clamping blocks (71) abutting against the outer surface of the engine cover assembly (200).

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