A surface difference and clearance detection device for a cover assembly

Abstract

The present invention provides a surface difference and gap detection device for a cover assembly, including a base. The detection device further includes: a detection pin assembly, including a detection pin fixing ring, on which a plurality of groups of detection pins are evenly and fixedly arranged in the circumferential direction. The detection pins are abutted above the outer panel of the cover assembly during detection, and the circuit is conducted through pressing to detect the surface difference of the outer panel; a prompting device, including a power supply and a plurality of groups of indicator lights, each group of indicator lights is electrically connected to a group of detection pins to prompt whether the surface difference of the outer panel is qualified; a reference component, which is arranged outside the cover assembly during detection to imitate the fuel filling port or charging port of a vehicle; a gap detection device, which is used to check whether the gap between the detection reference component and the outer panel is qualified; a cover assembly fixing device, which is used to fix the hinge in the cover assembly during detection. The present invention is used to detect the surface difference and gap of the fuel filling port cover and charging port cover of an automobile.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle detection, and particularly relates to a surface difference and gap detection device for a cover assembly. Background Art

[0002] With the development of the economy, automobiles have become increasingly popular, and people have higher and higher requirements for the appearance quality of automobiles. The fuel filler door and the charging port door are parts that users often come into contact with in daily use. The matching degree between the fuel filler door and the side panel has become one of the key points that users pay attention to. Therefore, the single-piece quality of the fuel filler door has also become a key component that automobile manufacturers need to control. The conventional inspection scheme is to use a surface difference gauge to inspect the surface difference of the fuel filler door, and it is necessary to detect point by point one by one, which seriously affects the production efficiency. Therefore, it is necessary to invent a surface difference and gap detection device for a cover assembly. Summary of the Invention

[0003] The purpose of the present invention is to provide a surface difference and gap detection device for a cover assembly, which is used to detect the surface difference and gap of the fuel filler door and the charging port door of an automobile.

[0004] The technical solution adopted by the present invention to solve its technical problems is:

[0005] A surface difference and gap detection device for a cover assembly includes a base, and the detection device further includes:

[0006] A detection pin assembly, including a detection pin fixing ring, on which several groups of detection pins are evenly fixed in the circumferential direction. The detection pins are abutted above the outer panel of the cover assembly during detection, and the circuit is conducted by pressing to detect the surface difference of the outer panel.

[0007] A prompting device, including a power supply and several groups of indicator lights. Each group of indicator lights is electrically connected to a group of detection pins to prompt whether the surface difference of the outer panel is qualified.

[0008] A reference component, which is arranged outside the cover assembly during detection and is used to imitate the fuel filler or charging port of a vehicle.

[0009] A gap detection device, which is used to check whether the gap between the detection reference component and the outer panel is qualified.

[0010] A cover assembly fixing device, which is used to fix the hinge in the cover assembly during detection.

[0011] Further, the detection pin includes a housing, in which a conductive upper cover is fixedly arranged. An upper wire connection point is electrically connected to the conductive upper cover. A conductive rod is arranged in the conductive upper cover. A conductive convex ring is arranged in the middle of the conductive rod. Insulating sleeves are fixedly arranged on both the upper and lower parts of the conductive rod. A conductive detection head is arranged below the conductive upper cover and is movably arranged in the housing. The conductive detection head is sleeved outside the conductive convex ring and the insulating sleeves. A lower wire connection point is also electrically connected to one side of the conductive detection head. An installation hole is further arranged on the outer wall of the conductive detection head, and an elastic conductive component is arranged in the installation hole. A spring is arranged between the conductive upper cover and the conductive detection head. A gap is arranged between the outer circular surface of the conductive convex ring and the inner circular surface of the conductive detection head. When the spring is loose, the elastic conductive component contacts the insulating sleeve. When the spring is compressed, the elastic conductive component contacts the conductive convex ring. The upper wire connection point and the lower wire connection point of each group of detection pins are electrically connected to a group of indicator lights.

[0012] Further, the lower part of the conductive detection head is a conical structure with a larger upper part and a smaller lower part.

[0013] Further, a limiting groove is arranged on the side wall of the housing. A limiting pin adapted to the limiting groove is fixedly arranged on the side wall of the conductive detection head. A limiting conductive ring for blocking the limiting pin is fixedly arranged at the lower end of the housing. The conductive detection head is movably connected to the limiting conductive ring, and the lower wire connection point is electrically connected to the limiting conductive ring.

[0014] Further, an adjusting screw is arranged at the upper end of the conductive upper cover. The upper end of the conductive rod is fixedly connected to the adjusting screw. A scale mark is arranged on the side wall of the conductive detection head, and a scale observation hole is arranged on one side of the housing.

[0015] Further, the reference component includes an opening and closing arc-shaped plate and several fixed arc-shaped plates. The opening and closing arc-shaped plate and the fixed arc-shaped plates are spliced to form a circular ring structure. One side of the opening and closing arc-shaped plate is fixedly connected to the opening and closing device of the reference component. The fixed arc-shaped plates are fixedly connected to the base through support seats.

[0016] Further, the gap detection device includes a handheld part. A thick detection head and a thin detection head are respectively and fixedly connected to both sides of the handheld part. During detection, the thick detection head and the thin detection head are sequentially inserted into the gap between the detection reference component and the outer plate for circumferential inspection.

[0017] Further, the detection device further includes a reference component opening and closing device. The reference component opening and closing device includes a first fixed seat fixedly connected to the base, a first connecting rod rotatably connected to the first fixed seat, and a first fixed pressing plate fixedly connected to one side of the first connecting rod. The lower end of the first connecting rod is hinged to the first fixed seat, and the first fixed pressing plate is fixedly connected to the side of the opening and closing arc plate. A limiting plate is fixedly arranged on one side of the first connecting rod, and a first fastening bolt is also arranged on the first connecting rod for fixing the first connecting rod on the first fixed seat during detection.

[0018] Further, the detection device further includes a detection pin component fixing device. The detection pin component fixing device includes a second fixed seat fixedly connected to the base, a second connecting rod rotatably connected to the second fixed seat, and a second fixed pressing plate fixedly connected to one side of the second connecting rod. The lower end of the second connecting rod is hinged to the second fixed seat, and during detection, the second fixed pressing plate abuts against the upper end surface of the detection pin fixing ring. A second fastening bolt is also arranged on the second connecting rod for fixing the second connecting rod on the second fixed seat during detection.

[0019] Further, the detection device further includes a plug pin component. The plug pin component includes a third fixed seat fixedly connected to the base, and a first plug pin hole is arranged on the third fixed seat. A guiding seat is fixedly arranged on one side of the third fixed seat, and a second plug pin hole is arranged at a position opposite to the first plug pin hole on the guiding seat. A plug pin is arranged in the first plug pin hole and the second plug pin hole, and the plug pin is used for inserting into the locking seat of the cover body component.

[0020] Further, the cover body component fixing device includes a third fixed seat, a hinge fixing plate is arranged on the third fixed seat, a threaded hole is arranged on the hinge fixing plate, and a third fastening bolt is arranged in the threaded hole. During detection, the hinge on the cover body component is fixed on the hinge fixing plate through the third fastening bolt.

[0021] Advantages of the present invention: For a surface difference and gap detection device for a cover body component of the present invention, after the cover body component is fixed on the detection device, the on and off of an indicator light is controlled by the on and off of the passage of the detection pin, achieving the purpose of visual inspection. The gap between the detection reference component and the outer panel can also be checked through the gap detection device. Using this device, the detection can be completed and the detection result can be obtained with only one detection. The detection speed is fast and the accuracy is high. Compared with using a surface difference gauge for detection, the detection time can be greatly reduced.

[0022] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings and embodiments. Description of the Drawings

[0023] Figure 1Structural diagram of the surface difference and gap detection device for a cover assembly of the present invention.

[0024] Figure 2 Another structural diagram of the surface difference and gap detection device for a cover assembly of the present invention.

[0025] Figure 3 Exploded view of the surface difference and gap detection device for a cover assembly of the present invention.

[0026] Figure 4 Structural diagram of the reference component.

[0027] Figure 5 Structural diagram of the gap detection device.

[0028] Figure 6 Structural diagram of the detection pin.

[0029] Figure 7 Cross-sectional view of the detection pin.

[0030] Figure 8 Exploded view of the detection pin.

[0031] Figure 9 Structural diagram of the opening and closing device of the reference component.

[0032] Figure 10 Structural diagram of the fixing device of the detection pin assembly.

[0033] Figure 11 Exploded view of the plug pin assembly.

[0034] Figure 12 Structural diagram of the cooperation between the plug pin assembly and the locking seat of the cover assembly.

[0035] Figure 13 Structural diagram of the fixing device of the cover assembly. Detailed implementation manners

[0036] As Figures 1 to 3 shown, a surface difference and gap detection device for a cover assembly includes a base 10, and the detection device further includes:

[0037] A detection pin assembly 1, including a detection pin fixing ring 11, on which a plurality of groups of detection pins 12 are evenly and fixedly arranged in the circumferential direction. The detection pins 12 abut above the outer plate 201 of the cover assembly 20 during detection, and conduct the circuit by pressing to detect the surface difference of the outer plate 201;

[0038] A prompting device 2, including a power source and a plurality of groups of indicator lights 21. Each group of indicator lights 21 is electrically connected to a group of detection pins 12 to prompt whether the surface difference of the outer plate 201 is qualified;

[0039] The reference component 3 is arranged outside the cover component 20 during detection and is used to imitate the fuel filling port or charging port of a vehicle;

[0040] The gap detection device 4 is used to check whether the gap between the detection reference component 3 and the outer panel 201 is qualified;

[0041] The cover component fixing device 5 is used to fix the hinge 202 in the cover component 20 during detection.

[0042] Preferably, in combination with the above solution, as Figures 6 to 8 shown, in order to achieve the on / off of the power supply during pressing contact, the detection pin 12 includes a housing 121 made of insulating material. A conductive upper cover 122 is fixedly arranged in the housing 121, and an upper wire connection point 124 is electrically connected to the conductive upper cover 122; a conductive rod 125 is arranged in the conductive upper cover 122. A conductive convex ring 126 is arranged in the middle of the conductive rod 125, and insulating sleeves 127 are fixedly arranged on the upper and lower parts of the conductive rod 125; a conductive detection head 128 is arranged below the conductive upper cover 122, and the conductive detection head 128 is movably arranged in the housing 121; the conductive detection head 128 is sleeved outside the conductive convex ring 126 and the insulating sleeve 127; a lower wire connection point 130 is also electrically connected to one side of the conductive detection head 128; an installation hole 131 is arranged on the outer wall of the conductive detection head 128, and an elastic conductive component 132 is arranged in the installation hole 131; a spring 133 is arranged between the conductive upper cover 122 and the conductive detection head 128; a gap is arranged between the outer circular surface of the conductive convex ring 126 and the inner circular surface of the conductive detection head 128; when the spring 133 is relaxed, the elastic conductive component 132 contacts the insulating sleeve 127, and when the spring 133 is compressed, the elastic conductive component 132 contacts the conductive convex ring 126; the upper wire connection point 124 and the lower wire connection point 130 of each group of detection pins 12 and a group of indicator lights 21 can be electrically connected through wires.

[0043] Preferably, in combination with the above solution, the lower part of the conductive detection head 128 is a conical structure with a larger upper part and a smaller lower part.

[0044] Preferably, in order to better achieve elastic conductive contact, two sets of the mounting holes 131 and the elastic conductive components 132 are symmetrically arranged. The elastic conductive component 132 includes a plug screw connected to the mounting hole 131, a compression spring and a contact ball arranged on one side of the plug screw. When the conductive detection head 128 is in the non-pressed state, the contact ball contacts the insulating sleeve 127 and is in a non-conductive state. When the conductive detection head 128 is in the pressed state, the contact ball contacts the conductive convex ring 126 and is in a conductive state. The current sequentially passes through the upper wire connection point 124, the conductive upper cover 122, the adjusting screw 123, the conductive convex ring 126, the elastic conductive component 132, the conductive detection head 128, the limiting conductive ring 129, the lower wire connection point 130 and is connected to the indicator light 21.

[0045] Preferably, in combination with the above solution, in order to prevent the conductive detection head 128 from falling off the housing 121, a limiting groove 1211 is further provided on the side wall of the housing 121. A limiting pin 1281 adapted to the limiting groove 1211 is fixedly arranged on the side wall of the conductive detection head 128. A limiting conductive ring 129 for blocking the limiting pin 1281 is fixedly arranged at the lower end of the housing 121. The conductive detection head 128 is movably connected to the limiting conductive ring 129, and the lower wire connection point 130 is electrically connected to the limiting conductive ring 129.

[0046] Preferably, in combination with the above solution, in order to adjust the conductive reference height, an adjusting screw 123 is provided at the upper end of the conductive upper cover 122. The upper end of the conductive rod 125 is fixedly connected to the adjusting screw 123. Scale marks are provided on the side walls of the conductive detection head 128 and the conductive rod 125. A scale observation hole 1212 is provided on one side of the housing 121.

[0047] Preferably, in combination with the above solution, as Figure 4 shown, in order to facilitate split processing, the reference component 3 includes an opening and closing arc plate 31 and a plurality of fixed arc plates 32. The opening and closing arc plate 31 and the fixed arc plates 32 are spliced to form a circular ring structure. In order to facilitate the installation and fixation of the cover component 20 during detection, one side of the opening and closing arc plate 31 is fixedly connected to the reference component opening and closing device 6, and the fixed arc plate 32 is fixedly connected to the base 10 through the support seat 30. During detection, the opening and closing arc plate 31 presses on the hinge 202 of the cover component 20.

[0048] Preferably, in combination with the above solution, as Figure 5As shown, in order to better detect whether the gap between the detection reference component 3 and the outer plate 201 is qualified, the gap detection device 4 includes a handheld part 41, and a rough detection head 42 and a fine detection head 43 are respectively and fixedly connected to both sides of the handheld part 41; during detection, the rough detection head 43 and the fine detection head 42 are sequentially inserted into the gap between the detection reference component 3 and the outer plate 201 for circumferential inspection.

[0049] Preferably, in combination with the above solution, as Figure 9 As shown, in order to facilitate the installation and fixation of the cover body component 20 during detection, the detection device further includes a reference component opening and closing device 6. The reference component opening and closing device 6 includes a first fixed seat 61 fixedly connected to the base 10, a first connecting rod 62 rotatably connected to the first fixed seat 61, and a first fixed pressing plate 63 fixedly connected to one side of the first connecting rod 62; the lower end of the first connecting rod 62 is hinged to the first fixed seat 61, and the first fixed pressing plate 63 is fixedly connected to the side of the opening and closing arc plate 31; a limiting plate 64 is also fixedly arranged on one side of the first connecting rod 62, and a first fastening bolt 65 for fixing the first connecting rod 62 to the first fixed seat 61 during detection is also arranged on the first connecting rod 62.

[0050] Preferably, in combination with the above solution, as Figure 10 As shown, in order to facilitate better fixation of the detection pin component 1 during detection and prevent the detection pin component 1 from loosening after pressing against the outer plate 201, the detection device further includes a detection pin component fixing device 7. The detection pin component fixing device 7 includes a second fixed seat 71 fixedly connected to the base 10, a second connecting rod 72 rotatably connected to the second fixed seat 71, and a second fixed pressing plate 73 fixedly connected to one side of the second connecting rod 72; the lower end of the second connecting rod 72 is hinged to the second fixed seat 71, and during detection, the second fixed pressing plate 73 abuts against the upper end surface of the detection pin fixing ring 11, and a second fastening bolt 74 for fixing the second connecting rod 72 to the second fixed seat 71 during detection is also arranged on the second connecting rod 72.

[0051] Preferably, in combination with the above solution, as Figure 11 and Figure 12As shown in the figure, in order to imitate the closed state of the cover assembly 20 during detection, the detection device further includes a latch assembly 8. The latch assembly 8 includes a third fixed seat 81 fixedly connected to the base 10. A first latch hole 811 is provided on the third fixed seat 81. A guide seat 82 is fixedly provided on one side of the third fixed seat 81. A second latch hole 821 is provided on the guide seat 82 at a position opposite to the first latch hole 811. A latch 83 is provided in the first latch hole 811 and the second latch hole 821. The latch 83 is used to insert into the locking seat 203 of the cover assembly 20. When the latch 83 is pulled out from the locking seat 203, the cover assembly 20 will open immediately.

[0052] Preferably, in combination with the above solution, as Figure 13 shown, in order to better fix the cover assembly 20 on the detection device, the fixing device 5 of the cover assembly includes a third fixed seat 51. A hinge fixing plate 52 is provided on the third fixed seat 51. A threaded hole 521 is provided on the hinge fixing plate 52. A third fastening bolt 53 is provided in the threaded hole 521. During detection, the hinge 202 on the cover assembly 20 is fixed to the hinge fixing plate 52 through the third fastening bolt 53.

[0053] Preferably, in combination with the above solution, in order to facilitate the handling of the detection device, handles 9 are fixedly provided on both sides of the base (1).

[0054] The usage method of the present invention:

[0055] From Figure 3 it can be seen that the cover assembly 20 of the vehicle includes an outer panel 201, a hinge 202 and a locking seat 203.

[0056] Step 1: When it is necessary to detect the surface difference, first loosen the first fastening bolt 65 of the reference assembly opening and closing device 6, and rotate the first connecting rod 62 backward. The first fixed pressing plate 63 drives the opening and closing arc plate 31 to rotate, so as to facilitate the installation of the cover assembly 20. Loosen the second fastening bolt 74 on the detection pin assembly fixing device 7, and rotate the second connecting rod 72 backward to drive the second fixed pressing plate 73 to rotate, so as to facilitate the installation of the detection pin assembly 1.

[0057] Step 2: Then install the cover assembly 20 into the detection reference assembly 3, fix the hinge 202 to the hinge fixing plate 52 of the third fixed seat 51 through the third fastening bolt 53, rotate the first connecting rod 62 upward to drive the opening and closing arc plate 31 to press above the hinge 202, and tighten the first fastening bolt 65 to fix.

[0058] Step 3: Then press down and flatten the outer panel 201, and insert the latch 83 from the latch assembly 8 into the locking seat 203 for locking.

[0059] Step 4: Place the detection pin assembly 1 above the outer panel 201, and let the conductive detection head 128 of the detection pin 12 contact the outer panel 201. Rotate the second connecting rod 72 of the detection pin assembly fixing device 7 upward. After the second fixing pressing plate 73 presses the outer panel 201, tighten the second fastening bolt 74 to fix it. At this time, the surface difference of the outer panel 201 can be detected. If the surface difference of the outer panel 201 is qualified, all five detection pins 12 are in a conductive state, and the corresponding five indicator lights 21 numbered 1-5 are all lit. If the surface difference at a certain place of the outer panel 201 is unqualified, the detection pin 12 at this place is in an open state, and the corresponding indicator light 21 is in an extinguished state.

[0060] Step 5: When it is necessary to check whether the gap between the detection reference assembly 3 and the outer panel 201 is qualified, first hold the handheld part 41, and try to insert the thick detection head 42 with a diameter of 5 mm into the gap for circumferential inspection. If the gap can pass through the thick detection head 42, the gap is unqualified. Try to insert the thin detection head 42 with a diameter of 3 mm into the gap for circumferential inspection. If the gap cannot pass through the thin detection head 42, the gap is unqualified. After the detection is completed, the gap detection device 4 can be stuck on the card seat of the base 1 to prevent loss.

[0061] The present invention has been described exemplarily above in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above-mentioned manner. As long as various improvements are made by adopting the method concept and technical solution of the present invention, or directly applied to other occasions without improvement, they all fall within the protection scope of the present invention.

Claims

1. A surface difference and clearance detection device for a cover assembly, comprising a base (10), characterized in that, The detection device further includes: A detection pin assembly (1), including a detection pin fixing ring (11). A plurality of groups of detection pins (12) are evenly and fixedly arranged around the circumferential direction on the detection pin fixing ring (11). When detecting, the detection pins (12) abut against the upper part of the outer plate (201) of the cover body assembly (20), and the circuit is conducted through pressing contact to detect the surface difference of the outer plate (201). A prompting device (2), including a power source and a plurality of groups of indicator lights (21). Each group of indicator lights (21) is electrically connected to a group of detection pins (12) to prompt whether the surface difference of the outer plate (201) is qualified. A reference component (3), which is arranged outside the cover body assembly (20) during detection and is used to imitate the fuel filling port or charging port of a vehicle. A gap detection device (4) for checking whether the gap between the reference component (3) and the outer plate (201) is qualified. A cover body assembly fixing device (5) for fixing the hinge (202) in the cover body assembly (20) during detection. The detection pin (12) includes a housing (121). A conductive upper cover (122) is fixedly arranged in the housing (121). An upper wire connection point (124) is electrically connected to the conductive upper cover (122). A conductive rod (125) is arranged in the conductive upper cover (122). A conductive convex ring (126) is arranged in the middle of the conductive rod (125). Insulating sleeves (127) are fixedly arranged on the upper and lower parts of the conductive rod (125). A conductive detection head (128) is arranged below the conductive upper cover (122), and the conductive detection head (128) is movably arranged in the housing (121). The conductive detection head (128) is sleeved outside the conductive convex ring (126) and the insulating sleeve (127). A lower wire connection point (130) is also electrically connected to one side of the conductive detection head (128). An installation hole (131) is arranged on the outer wall of the conductive detection head (128), and an elastic conductive component (132) is arranged in the installation hole (131). A spring (133) is arranged between the conductive upper cover (122) and the conductive detection head (128). A gap is arranged between the outer circular surface of the conductive convex ring (126) and the inner circular surface of the conductive detection head (128). When the spring (133) is relaxed, the elastic conductive component (132) contacts the insulating sleeve (127), and when the spring (133) is compressed, the elastic conductive component (132) contacts the conductive convex ring (126). The upper wire connection point (124) and the lower wire connection point (130) of each group of detection pins (12) are electrically connected to a group of indicator lights (21).

2. The surface difference and clearance detection device for the cover assembly according to claim 1, characterized in that The lower part of the conductive detection head (128) is a conical structure with a larger upper part and a smaller lower part.

3. The surface difference and gap detection device for the cover assembly according to claim 1, characterized in that, The side wall of the outer shell (121) is further provided with a limiting groove (1211), a limiting pin (1281) adapted to the limiting groove (1211) is fixedly arranged on the side wall of the conductive detection head (128), a limiting conductive ring (129) for blocking the limiting pin (1281) is fixedly arranged at the lower end of the outer shell (121), the conductive detection head (128) is movably connected with the limiting conductive ring (129), and the lower wire connection point (130) is electrically connected with the limiting conductive ring (129).

4. The surface difference and clearance detection device for the cover assembly according to claim 1, wherein An adjusting screw (123) is arranged at the upper end of the conductive upper cover (122), the upper end of the conductive rod (125) is fixedly connected with the adjusting screw (123), a scale mark is arranged on the side wall of the conductive detection head (128), and a scale observation hole (1212) is formed on one side of the outer shell (121).

5. The surface difference and gap detection device for the cover assembly according to claim 1, characterized in that, The reference assembly (3) includes an opening and closing arc-shaped plate (31) and several fixed arc-shaped plates (32). The opening and closing arc-shaped plate (31) and the fixed arc-shaped plates (32) are spliced to form a circular ring structure. One side of the opening and closing arc-shaped plate (31) is fixedly connected with a reference assembly opening and closing device (6), and the fixed arc-shaped plates (32) are fixedly connected with the base (10) through a support seat (30).

6. The surface difference and clearance detection device for the cover assembly according to claim 1, characterized in that The gap detection device (4) includes a handheld part (41), and a rough detection head (42) and a fine detection head (43) are respectively and fixedly connected to both sides of the handheld part (41); during detection, the rough detection head (43) and the fine detection head (42) are sequentially inserted into the gap between the reference assembly (3) and the outer plate (201) for circumferential inspection.

7. The surface difference and clearance detection device for the cover assembly according to claim 1, characterized in that, The detection device further includes a reference assembly opening and closing device (6). The reference assembly opening and closing device (6) includes a first fixed seat (61) fixedly connected with the base (10), a first connecting rod (62) rotatably connected with the first fixed seat (61), and a first fixed pressing plate (63) fixedly connected to one side of the first connecting rod (62); the lower end of the first connecting rod (62) is hinged to the first fixed seat (61), and the first fixed pressing plate (63) is fixedly connected to the side edge of the opening and closing arc-shaped plate (31); a limiting plate (64) is further fixedly arranged on one side of the first connecting rod (62), and a first fastening bolt (65) for fixing the first connecting rod (62) on the first fixed seat (61) during detection is further arranged on the first connecting rod (62).

8. The surface difference and clearance detection device for the cover assembly according to claim 1, characterized in that, The detection device further includes a fixing device (7) for the detection pin assembly. The fixing device (7) for the detection pin assembly includes a second fixing base (71) fixedly connected to the base (10), a second connecting rod (72) rotatably connected to the second fixing base (71), and a second fixing pressing plate (73) fixedly connected to one side of the second connecting rod (72). The lower end of the second connecting rod (72) is hinged to the second fixing base (71). During detection, the second fixing pressing plate (73) abuts against the upper end surface of the detection pin fixing ring (11). A second fastening bolt (74) is further provided on the second connecting rod (72) for fixing the second connecting rod (72) to the second fixing base (71) during detection.

9. The surface difference and gap detection device for the cover assembly according to claim 1, characterized in that The detection device further includes a plug pin assembly (8). The plug pin assembly (8) includes a third fixing base (81) fixedly connected to the base (10). A first plug pin hole (811) is provided on the third fixing base (81). A guiding base (82) is fixedly provided on one side of the third fixing base (81). A second plug pin hole (821) is provided on the guiding base (82) at a position corresponding to the first plug pin hole (811). A plug pin (83) is provided in the first plug pin hole (811) and the second plug pin hole (821). The plug pin (83) is used to insert into the locking base (203) of the cover body assembly (20).

10. The surface difference and clearance detection device for the cover assembly according to claim 1, characterized in that, The fixing device (5) for the cover body assembly includes a third fixing base (51). A hinge fixing plate (52) is provided on the third fixing base (51). A threaded hole (521) is provided on the hinge fixing plate (52). A third fastening bolt (53) is provided in the threaded hole (521). During detection, the hinge (202) on the cover body assembly (20) is fixed to the hinge fixing plate (52) by the third fastening bolt (53).

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