Hook plate testing fixture
By designing the hook plate inspection tool, the alignment and passage of the pin shaft and the positioning hole are solved, and the problems of complex and inefficient detection of the hook plate hole position in the prior art are achieved, and fast and accurate large-scale inspection is achieved.
Patent Information
- Application Number
- CN202420772225.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-13
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-04-13
AI Technical Summary
When detecting the positional relationship between the locking hole and the pin hole of the hook plate, the three-coordinate detection method is too complex and the calculation amount is large, resulting in a long detection time and low efficiency, which cannot be applied to large-scale inspection.
A hook plate inspection tool is designed, by providing a first positioning hole, a second positioning hole and a third positioning hole on the base, and equipped with corresponding pins, the hole position relationship of the hook plate is quickly detected by the alignment of the pins and passing through.
This inspection tool can quickly and accurately detect the position relationship between the locking hole and pin hole of the hook plate, and is suitable for large-scale inspection and improve detection efficiency.
Smart Images
Figure CN222598698U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of hook plate detection, and in particular to a hook plate detection fixture. Background Art
[0002] The hook plate is an automobile component. The specific shape of the hook plate is as follows: Figure 1 , Figure 2 and Figure 3 As shown, a hook portion is integrally formed at one end of the hook plate, and the hook portion and the bottom of the hook plate form a locking hole. The locking hole is arranged along the width direction of the hook plate, and the hook plate is provided with two pin holes along its own length direction, and the central axes of the two pin holes are parallel to each other, and the locking hole is connected with the adjacent pin hole.
[0003] Since there will be errors in the processing of hook plates, in order to detect whether the produced hook plates can be actually put into use, it is usually necessary to detect the length, width, and positional relationship between the locking hole and the pin hole of the hook plates. The general detection method is to use the three-coordinate detection method with calculation software to obtain the size, shape, relative position and other parameters of the hook plates.
[0004] However, the positional relationship between the locking hole and the pin hole includes: the positional relationship between the same plane where the central axes of the two pin holes are located and the central axis of the locking hole; the distance between the central axis of the locking hole and the central axis of the pin hole away from it; the distance between the central axes of the two pin holes, etc. The above parameters are too complicated to detect using the three-coordinate method, with a large amount of calculation and a long detection time, resulting in low detection efficiency and cannot be applied to large-scale detection of hook plates. Utility Model Content
[0005] In order to quickly detect whether the position relationship between the locking hole and the pin hole meets the design requirements, so as to facilitate rapid detection of large quantities of hook plates, the present application provides a hook plate inspection fixture.
[0006] The hook plate inspection fixture provided in this application adopts the following technical solution:
[0007] A hook plate inspection tool, comprising a base, the base is provided with a first positioning hole and a second positioning hole, the base is provided with a side plate, at least one of the side plates is provided with a third positioning hole, the first positioning hole is penetrated by a first pin, the second positioning hole is penetrated by a second pin, and the third positioning hole is penetrated by a third pin;
[0008] After the hook plate standard part is adjusted to a position on the base, the pin hole in the hook plate standard part away from the locking hole corresponds to and communicates with the first positioning hole, and the pin hole in the hook plate standard part adjacent to the locking hole corresponds to and communicates with the second positioning hole, and the locking hole of the hook plate standard part also corresponds to and communicates with the third positioning hole at the same time;
[0009] When the first pin shaft passes through the pin hole away from the locking hole and the first positioning hole in the hook plate standard part, the second pin shaft can pass through the pin hole adjacent to the locking hole and the second positioning hole in the hook plate standard part, and the third pin shaft can pass through the locking hole and the third positioning hole of the hook plate standard part.
[0010] By adopting the above technical solution, the hook plate is placed on the base, and then the pin hole in the hook plate away from the locking hole is aligned with the first positioning hole, the first pin shaft is passed through the pin hole and the first positioning hole in sequence, and then the second pin shaft is tried to pass through the pin hole and the second positioning hole in the hook plate adjacent to the locking hole in sequence. If the second pin shaft can pass through smoothly, it means that the spacing between the two pin holes is qualified, and then the third pin shaft is tried to pass through the third positioning hole and the locking hole in sequence. If the third pin shaft can pass through smoothly, it means that the positional relationship between the pin hole and the locking hole meets the design requirements. Compared with using the three-coordinate detection method to mark several coordinate points on the hook plate, and then calculating the model of the hook plate through software to determine whether the positional relationship between the pin hole and the locking hole is qualified, the inspection fixture can quickly detect whether the positional relationship between the locking hole and the pin hole meets the design requirements, so as to facilitate rapid detection of large quantities of hook plates.
[0011] Optionally, two side panels are provided on the base, and the two side panels are arranged opposite to each other, one end of the two side panels is provided with a first protrusion, and the other end of the two side panels is provided with a second protrusion, the width of the hook plate standard part is smaller than the spacing between the two first protrusions, and the width of the hook plate standard part is larger than the spacing between the two second protrusions.
[0012] By adopting the above technical solution, when testing the hook plate, the hook plate is pushed between the two side plates, and the hook plate is pushed in from the end of the side plate provided with the first protrusion;
[0013] If the hook plate cannot pass between the two first protrusions, it means that the width of the hook plate is too large;
[0014] If the hook plate can pass between the two second protrusions, it means that the width of the hook plate is too small;
[0015] If the hook plate can pass smoothly between the two first protrusions and the end surface of the hook plate provided with the hook portion abuts against the second protrusion, it means that the width dimension of the hook plate meets the design requirements, thereby realizing rapid detection of the width of the hook plate.
[0016] Optionally, the first protruding portion includes a first protruding block and a second protruding block, the first protruding block and the second protruding block are both arranged above opposite sides of the two side plates, the spacing between the two first protruding blocks is the same as the spacing between the two second protruding blocks, the height of the first protruding block is smaller than the height of the second protruding block, the first protruding block corresponds to an end of the hook plate standard component away from the hook portion, and the second protruding block corresponds to the middle of the hook plate standard component;
[0017] The second protruding portion includes a third protruding block and a fourth protruding block, the third protruding block and the fourth protruding block are both arranged above the opposite side of the two side plates, the third protruding block is located between the fourth protruding block and the second protruding block, the spacing between the two third protruding blocks is the same as the spacing between the two second protruding blocks, the spacing between the two fourth protruding blocks is smaller than the spacing between the two third protruding blocks, and the third protruding block and the fourth protruding block correspond to the hook portion of the hook plate standard part;
[0018] After the hook plate standard part is adjusted to a good position on the base, the first protruding block overlaps with the top of the side surface of the end of the hook plate standard part away from the hook portion, the second protruding block overlaps with the top of the side surface in the middle of the hook plate standard part, the third protruding block overlaps with the top of the side surface of the hook portion of the hook plate standard part, and the fourth protruding block abuts against the end of the hook portion of the hook plate standard part.
[0019] By adopting the above technical solution, the hook plate is pushed between the two side plates, and the hook portion of the hook plate tries to pass through the first protrusion block, the second protrusion block and the third protrusion block in sequence. If the hook plate can pass through the first protrusion block, the second protrusion block and the third protrusion block in sequence and the end face of the hook portion of the hook plate finally abuts against the fourth protrusion block, it means that the width dimension of the hook plate meets the design requirements;
[0020] And because the design shape of the hook plate is: the top surface elevation of the bent hook part of the hook plate is higher than the top surface elevation of the other end of the hook plate, and the top surface elevation of the other end of the hook plate is higher than the top surface elevation of the middle section of the hook plate, by setting the first raised block, the second raised block, the third raised block and the fourth raised block to different heights, the contact area between the hook plate and the first raised block, the second raised block and the third raised block can be reduced, thereby reducing the scratches and wear on the side of the hook plate during the detection process.
[0021] Optionally, the two side panels are each provided with the third positioning hole, and the two third positioning holes are coaxially arranged.
[0022] Optionally, a stepped groove is formed at the end of the second pin shaft, and when the second pin shaft is inserted into the second positioning hole, the third pin shaft can pass through one of the third positioning holes, the stepped groove and another of the third positioning holes in sequence.
[0023] Optionally, the insertion end of the first pin shaft, the insertion end of the second pin shaft, and the insertion end of the third pin shaft are all chamfered along their respective outer circumferential surfaces.
[0024] By adopting the above technical solution, the chamfer plays a guiding role for the perforations of the first pin, the second pin and the third pin.
[0025] Optionally, the length of the base is greater than the length of the side panel, and two ends of the base extend out from two ends of the side panel respectively.
[0026] By adopting the above technical solution, during testing, one end of the hook plate can be placed on the end surface of one end of the base, making it convenient for the tester to fit the hook plate to the top surface of the base and push it between the two side plates.
[0027] Optionally, movable channels are provided at both ends of the base, the spacing between the inner walls of the two adjacent movable channels is the same as the length of the side panel, a threaded hole connected to the movable channel is provided on the end face of the base, a slide plate is passed through the sliding channel, the slide plate has a long groove, and the long groove is connected to the threaded hole.
[0028] By adopting the above technical solution, during testing, first pull up the slide plate close to the second protrusion, then use a fixing bolt to threadably connect it to the threaded hole and tighten it against the long groove to fix the slide plate to the base. When the hook plate is fully inserted between the two side plates, push up the slide plate close to the first protrusion. If the slide plate close to the first protrusion can be pushed up smoothly, it means that the length of the hook plate is not too long.
[0029] Optionally, legs are provided at the bottom of the base.
[0030] By adopting the above technical solution, the legs raise the base, thereby providing space for the skateboard to slide up and down.
[0031] Optionally, the side surfaces of the first pin shaft, the second pin shaft, the third pin shaft, the first protruding block, the second protruding block, the third protruding block and the fourth protruding block are all surface-smoothed, and the Ra value is 1.6.
[0032] By adopting the above technical solution, scratches on the side surface of the hook plate, the inner wall of the pin hole and the inner wall of the locking hole can be reduced.
[0033] In summary, the present application includes at least one of the following beneficial technical effects:
[0034] 1. The inspection fixture can quickly detect whether the position relationship between the locking hole and the pin hole meets the design requirements, so as to facilitate rapid inspection of large quantities of hook plates;
[0035] 2. If the hook plate can pass smoothly between the two first protrusions and the end surface of the hook plate provided with the hook portion abuts against the second protrusion, it means that the width dimension of the hook plate meets the design requirements, thereby realizing rapid detection of the width of the hook plate;
[0036] 3. By setting the first protrusion block, the second protrusion block, the third protrusion block and the fourth protrusion block to different heights, the contact area between the hook plate and the first protrusion block, the second protrusion block and the third protrusion block can be reduced, thereby reducing the scratches and wear on the side of the hook plate during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS
[0037] Figure 1 It is a schematic diagram of the overall structure of the hook plate.
[0038] Figure 2 It is a schematic diagram of the structure on the back of the hook plate.
[0039] Figure 3 It is a structural diagram of the side of the hook plate.
[0040] Figure 4 It is a schematic diagram of the overall structure of Example 1 of the present application.
[0041] Figure 5 It is a schematic diagram of the structure of the hook plate assembled on the inspection fixture in Example 1 of the present application.
[0042] Figure 6 It is a schematic diagram of the overall structure of Example 2 of the present application.
[0043] Explanation of the reference numerals: 11. hook portion; 12. locking hole; 13. pin hole; 2. base; 21. leg; 22. first positioning hole; 23. second positioning hole; 24. movable channel; 25. threaded hole; 3. side panel; 31. slot; 32. first raised portion; 321. first raised block; 322. second raised block; 33. second raised portion; 331. third raised block; 332. fourth raised block; 34. third positioning hole; 4. first pin shaft; 5. second pin shaft; 51. stepped groove; 6. third pin shaft; 7. slide plate; 71. long groove. DETAILED DESCRIPTION
[0044] The following is combined with Figure 4-6 This application is described in further detail.
[0045] Example 1
[0046] Embodiment 1 of the present application discloses a hook plate inspection fixture.
[0047] like Figure 4 and Figure 5The hook plate inspection fixture includes a base 2, and the four corners of the bottom surface of the base 2 are provided with legs 21. In the embodiment of the present application, the legs 21 are threadedly connected to the base 2 using hexagon socket bolts. Side panels 3 are provided on both sides of the base 2, and a slot 31 is provided at the bottom of the side panel 3. The slot 31 is provided along the length direction of the side panel 3. The side panel 3 is placed on the base 2 through the slot 31. The base 2 and the side panel 3 are jointly provided with two cylindrical pins for pre-positioning. The base 2 and the side panel 3 are fixedly connected by hexagon socket bolts. The length of the base 2 is greater than that of the side panel 3, and the two ends of the base 2 extend from one end of the side panel 3.
[0048] The surface of the side panel 3 is milled to obtain the first raised portion 32 and the second raised portion 33, the first raised portion 32 includes a first raised block 321 and a second raised block 322, the second raised portion 33 includes a third raised block 331 and a fourth raised block 332, the first raised block 321, the second raised block 322, the third raised block 331 and the fourth raised block 332 are all subjected to surface smoothing processing, Ra value is 1.6, the first raised block 321, the second raised block 322, the third raised block 331 and the fourth raised block 332 are all located at the top of the side surface of the side panel 3, the first raised block 321 is located at one end of the side panel 3, the fourth raised block 332 is located at the other end of the side panel 3, the second raised block 322 is located in the middle of the side panel 3, the third raised block 331 is located between the fourth raised block 332 and the second raised block 322, and the third raised block 331 is connected with the fourth raised block 332.
[0049] In the embodiment of the present application, the first protrusion, the second protrusion block 322 and the third protrusion block 331 all protrude 0.5 mm, the fourth protrusion block 332 protrudes 0.8 mm, the height of the first protrusion block 321 is less than the height of the second protrusion block 322, the third protrusion block 331 is the same as the fourth protrusion block 332, and the height of the third protrusion block 331 is less than the height of the first protrusion block 321;
[0050] After the hook plate standard part is adjusted on the base 2, the first protruding block 321 corresponds to the end of the hook plate standard part away from the hook portion 11, and the first protruding block 321 overlaps with the top of the side of the end of the hook plate standard part away from the hook portion 11;
[0051] The second protruding block 322 corresponds to the middle of the hook plate standard component, and the second protruding block 322 coincides with the top of the side of the middle of the hook plate standard component;
[0052] The third protruding block 331 corresponds to the hook portion 11 of the hook plate standard part, and the third protruding block 331 coincides with the top of the side surface;
[0053] The fourth protruding block 332 abuts against the end of the hook portion 11 of the hook plate standard component.
[0054] In the embodiment of the present application, the distance between the bottom surface of the first protruding block 321 and the top surface of the base 2 is 23 mm, the distance between the bottom surface of the second protruding block 322 and the top surface of the base 2 is 21 mm, and the distance between the third protruding block 331 and the fourth protruding block 332 and the top surface of the base 2 is 27 mm.
[0055] In other embodiments, the first protrusion 32 may be a square protrusion block and extend from one end of the side plate 3 to the middle of the side plate 3, and the height of the square protrusion block is 1 / 2 of the height of the side plate 3 or is the same as the side plate 3. The second protrusion 33 may also be a square protrusion block and is disposed at the other end of the side plate 3. The thickness of the second protrusion 33 is greater than the thickness of the first protrusion 33.
[0056] In other embodiments, the first protrusion 33 may also be a trapezoidal protrusion block, the second protrusion 33 may also be a trapezoidal protrusion block, and the side surfaces of the two trapezoidal protrusion blocks are connected to form a continuous inclined surface.
[0057] like Figure 4 and Figure 5 The base 2 is provided with a first positioning hole 22 and a second positioning hole 23, which are arranged along the length direction of the base 2, and the center line of the base 2 in the length direction intersects and is perpendicular to the center axis of the first positioning hole 22 and the center axis of the second positioning hole 23. The side panels 3 are provided with a third positioning hole 34, and the center axes of the third positioning holes 34 of the two side panels 3 coincide with each other and are parallel to the top surface of the base 2, and the third positioning hole 34 is located below the third protruding block 331 and the fourth protruding block 332.
[0058] The first positioning hole 22 is penetrated by the first pin 4, the second positioning hole 23 is penetrated by the second pin 5, and the two third positioning holes 34 are penetrated by the third pin 6. The first pin 4, the second pin 5 and the third pin 6 are all surface-smoothed, and the Ra value is 1.6. The insertion ends of the first pin 4, the second pin 5 and the third pin 6 are chamfered along the circumference of their respective end faces. The top (handheld end) of the second pin 5 is provided with a stepped groove 51, and the end (handheld end) of the third pin 6 is knurled. In other embodiments, the top (handheld end) of the second pin 5 can also be provided with other types of grooves for the third pin 6 to pass through, or the top size of the second pin 5 can be reduced.
[0059] After the hook plate standard part is adjusted on the base 2, the pin hole 13 in the hook plate standard part away from the locking hole 12 corresponds to and communicates with the first positioning hole 22, and the first pin shaft 4 can pass through the pin hole 13 and the first positioning hole 22;
[0060] At the same time, the pin hole 13 adjacent to the locking hole 12 in the hook plate standard part corresponds to and is connected to the second positioning hole 23, and the second pin shaft 5 can pass through the pin hole 13 and the second positioning hole 23;
[0061] At the same time, the locking hole 12 of the hook plate standard component also corresponds to and is connected to the third positioning hole 34 , and the third pin 6 can pass through the locking hole 12 of the hook plate standard component and the third positioning hole 34 .
[0062] When testing the hook plate, one end of the hook plate is placed on the end surface of one end of the base 2. The tester fits the hook plate against the top surface of the base 2 and pushes it between the two side plates 3. The hook portion 11 of the hook plate tries to pass through the first protrusion block 321, the second protrusion block 322 and the third protrusion block 331 in sequence. If the hook plate can pass through the first protrusion block 321, the second protrusion block 322 and the third protrusion block 331 in sequence and the end surface of the hook portion 11 of the hook plate finally abuts against the fourth protrusion, it means that the width of the hook plate meets the design requirements.
[0063] If the hook plate cannot pass through the first protruding block 321, the second protruding block 322 and the third protruding block 331 smoothly, it means that the width of the hook plate is too large.
[0064] If the hook plate can pass through the fourth protruding block 332, it means that the width of the hook plate is too small, thereby realizing a quick detection of the width size of the hook plate.
[0065] Next, align the pin hole 13 away from the locking hole 12 in the hook plate with the first positioning hole 22, pass the first pin shaft 4 through the pin hole 13 and the first positioning hole 22 in sequence, and then try to pass the second pin shaft 5 through the pin hole 13 and the second positioning hole 23 adjacent to the locking hole 12 in the hook plate in sequence. If the second pin shaft 5 can pass through smoothly, it means that the spacing between the two pin holes 13 is qualified. Then try to pass the third pin shaft 6 through a third positioning hole 34, the locking hole 12, the stepped groove 51 and another third positioning hole 34 in sequence. If the third pin shaft 6 can pass through smoothly, it means that the positional relationship between the pin hole 13 and the locking hole 12 meets the design requirements. Compared with using the three-coordinate detection method to mark several coordinate points on the hook plate, and then calculating the model of the hook plate through software to determine whether the positional relationship between the pin hole 13 and the locking hole 12 is qualified, the inspection fixture can quickly detect whether the positional relationship between the locking hole 12 and the pin hole 13 meets the design requirements, so as to facilitate rapid detection of large quantities of hook plates.
[0066] And during the detection process, since the design shape of the hook plate is: the top surface elevation of the bent hook portion 11 of the hook plate is higher than the top surface elevation of the other end of the hook plate, and the top surface elevation of the other end of the hook plate is higher than the top surface elevation of the middle section of the hook plate, by setting the first protrusion, the second protrusion, the third protrusion and the fourth protrusion to different heights, the contact area between the hook plate and the first protrusion, the second protrusion and the third protrusion can be reduced, thereby reducing the scratches and wear on the side of the hook plate during the detection process.
[0067] Example 2
[0068] like Figure 6The difference between this embodiment and embodiment 1 is that movable channels 24 are provided at both ends of the base 2, the distance between the inner side walls adjacent to the two movable channels 24 is the same as the length of the side plate 3, and a threaded hole 25 connected to the movable channel 24 is provided on the end surface of the base 2. A slide plate 7 is inserted into the movable channel 24, and the slide plate 7 is provided with a long groove 71, which is a waist-shaped groove and is connected to the threaded hole 25.
[0069] During the inspection, first pull up the slide plate 7 close to the second protrusion 33, then use the fixing bolt to threadably connect it to the threaded hole 25 and press against the long groove 71 to fix the slide plate 7 to the base 2. When the hook plate is fully inserted between the two side plates 3, push upward the slide plate 7 close to the first protrusion 32. If the slide plate 7 close to the first protrusion 32 can be pushed upward smoothly, it means that the length of the hook plate is not too long.
[0070] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.
Claims
1. A hook plate inspection fixture, characterized in that: The invention comprises a base (2), wherein a first positioning hole (22) and a second positioning hole (23) are formed on the base (2), and a side plate (3) is provided on the base (2), and at least one of the side plates (3) is provided with a third positioning hole (34), a first pin (4) is passed through the first positioning hole (22), a second pin (5) is passed through the second positioning hole (23), and a third pin (6) is passed through the third positioning hole (34); After the hook plate standard part is adjusted in position on the base (2), the pin hole (13) in the hook plate standard part away from the locking hole (12) corresponds to and communicates with the first positioning hole (22), and the pin hole (13) in the hook plate standard part adjacent to the locking hole (12) corresponds to and communicates with the second positioning hole (23), and the locking hole (12) of the hook plate standard part also corresponds to and communicates with the third positioning hole (34) at the same time; When the first pin shaft (4) passes through the pin hole (13) far from the locking hole (12) and the first positioning hole (22) in the hook plate standard component, the second pin shaft (5) can pass through the pin hole (13) adjacent to the locking hole (12) and the second positioning hole (23) in the hook plate standard component, and the third pin shaft (6) can pass through the locking hole (12) and the third positioning hole (34) of the hook plate standard component.
2. The hook plate inspection fixture according to claim 1, characterized in that: Two side plates (3) are arranged on the base (2), the two side plates (3) are arranged opposite to each other, one end of the two side plates (3) is provided with a first protrusion (32), the other end of the two side plates (3) is provided with a second protrusion (33), the width of the hook plate standard part is smaller than the spacing between the two first protrusions (32), and the width of the hook plate standard part is larger than the spacing between the two second protrusions (33).
3. The hook plate inspection fixture according to claim 2, characterized in that: The first protruding portion (32) comprises a first protruding block (321) and a second protruding block (322), the first protruding block (321) and the second protruding block (322) are both arranged above the opposite side of the two side plates (3), the distance between the two first protruding blocks (321) is the same as the distance between the two second protruding blocks (322), the height of the first protruding block (321) is smaller than the height of the second protruding block (322), the first protruding block (321) corresponds to the end of the hook plate standard part away from the bent hook part (11), and the second protruding block (322) corresponds to the middle of the hook plate standard part; The second protruding portion (33) comprises a third protruding block (331) and a fourth protruding block (332), the third protruding block (331) and the fourth protruding block (332) are both arranged above the opposite side of the two side plates (3), the third protruding block (331) is located between the fourth protruding block (332) and the second protruding block (322), the spacing between the two third protruding blocks (331) is the same as the spacing between the two second protruding blocks (322), the spacing between the two fourth protruding blocks (332) is smaller than the spacing between the two third protruding blocks (331), and the third protruding block (331) and the fourth protruding block (332) correspond to the hook portion (11) of the hook plate standard component; After the hook plate standard component is adjusted in position on the base (2), the first protruding block (321) overlaps with the top of the side surface of the end of the hook plate standard component away from the hook portion (11), the second protruding block (322) overlaps with the top of the side surface in the middle of the hook plate standard component, the third protruding block (331) overlaps with the top of the side surface of the hook portion (11) of the hook plate standard component, and the fourth protruding block (332) abuts against the end of the hook portion (11) of the hook plate standard component.
4. The hook plate gauge according to any one of claims 2 or 3, characterized in that: The two side plates (3) are each provided with the third positioning hole (34), and the two third positioning holes (34) are coaxially arranged.
5. The hook plate inspection fixture according to claim 1, characterized in that: A stepped groove (51) is provided at the end of the second pin shaft (5), and when the second pin shaft (5) is inserted into the second positioning hole (23), the third pin shaft (6) can pass through one of the third positioning holes (34), the stepped groove (51) and another of the third positioning holes (34) in sequence.
6. The hook plate inspection fixture according to claim 1, characterized in that: The insertion end of the first pin shaft (4), the insertion end of the second pin shaft (5) and the insertion end of the third pin shaft (6) are all provided with chamfers along their respective outer peripheral surfaces.
7. The hook plate gauge according to any one of claims 2 or 3, characterized in that: The length of the base (2) is greater than the length of the side plate (3), and two ends of the base (2) extend out from two ends of the side plate (3).
8. The hook plate inspection fixture according to claim 7, characterized in that: Both ends of the base (2) are provided with movable channels (24), the distance between the inner side walls adjacent to the two movable channels (24) is the same as the length of the side plate (3), the end surface of the base (2) is provided with a threaded hole (25) connected to the movable channel (24), a slide plate (7) is inserted into the movable channel (24), the slide plate (7) is provided with a long groove (71), and the long groove (71) is connected to the threaded hole (25).
9. The hook plate inspection fixture according to claim 7, characterized in that: The bottom of the base (2) is provided with supporting legs (21).
10. The hook plate inspection fixture according to claim 3, characterized in that: The side surfaces of the first pin shaft (4), the second pin shaft (5), the third pin shaft (6), the first protruding block (321), the second protruding block (322), the third protruding block (331) and the fourth protruding block (332) are all subjected to surface smoothing treatment, and the Ra value is 1.6.