Brake shoe latch inspection and dimension detection tool

Abstract

The present invention provides a brake shoe latch maintenance dimension detection tool, including a maintenance box, a dimension measuring plate and a curvature measuring plate. The maintenance box is provided with a receiving cavity, and the maintenance box is provided with a first limit slide groove and a second limit slide groove; the dimension measuring plate is slidably connected in the receiving cavity, and the upper edge of the dimension measuring plate is provided with a dimension marking point; the curvature measuring plate is slidably connected in the receiving cavity, and the upper edge of the curvature measuring plate has a convex portion. The brake shoe latch maintenance dimension detection tool provided by the present invention comprises a dimension measuring plate and a curvature measuring plate arranged in the maintenance box, and the dimension marking points on the dimension measuring plate can detect different parts of the brake shoe latch, and the convex portion on the curvature measuring plate can be engaged with the inner wall of one side of the arc-shaped notch of the brake shoe latch, so as to detect the curvature of the arc-shaped notch itself. The above structure effectively improves the detection efficiency, ensures the detection quality of the component, and the data measurement is more comprehensive, so that the maintenance quality of the brake shoe latch is greatly improved.

Description

Technical Field

[0001] The invention belongs to the technical field of size detection tooling, and more specifically, relates to a brake shoe latch maintenance size detection tooling. Background Art

[0002] When inspecting and repairing brake shoe latches, the dimensions are first inspected, then rectified or repaired by gas welding according to the inspection results, and finally the dimensions are checked. Currently, when inspecting and repairing brake shoe latches, employees need to use multiple inspection tools such as box rulers and vernier calipers. The inspection process is cumbersome and the measurement efficiency is slow, which does not meet the actual production needs on site.

[0003] In addition, the existing inspection is only for size inspection, and it is difficult to inspect the parts with curvature. Therefore, there are omissions in the inspection, and the quality of the bolt inspection cannot be fully guaranteed. Summary of the invention

[0004] The purpose of the present invention is to provide a brake shoe latch maintenance dimension detection tool, which can respectively detect the dimension and curvature of the brake shoe latch, thereby improving the detection efficiency and ensuring the quality of the product.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a brake shoe latch inspection size detection tool, comprising:

[0006] The inspection box is provided with a receiving cavity opening upward, and two opposite side walls of the inspection box are respectively provided with a first limiting slide groove and a second limiting slide groove extending in the up-down direction;

[0007] A dimension measuring plate is slidably connected in the accommodating cavity. A first limit slider protruding outward and extending into the first limit slide groove is provided on one side wall of the dimension measuring plate. The first limit slider is slidably matched with the first limit slide groove. A plurality of dimension marking points are provided on the upper edge of the dimension measuring plate.

[0008] The curvature measuring plate is slidably connected in the accommodating cavity. A second limit slider protruding outward and extending into the second limit slide groove is provided on the side wall of the curvature measuring plate. The second limit slider is slidably matched with the second limit slide groove. The upper edge of the curvature measuring plate has a protrusion that protrudes upward in an arc shape to detect the curvature of the brake shoe latch.

[0009] In a possible implementation, the dimension measuring plate is provided with a snap-fitting opening with an opening upward and two side walls corresponding to two adjacent dimension marking points respectively, and the snap-fitting opening is used to snap-fit ​​to the protruding position of the brake shoe latch to detect the size of the protruding position.

[0010] In some embodiments, a limiting portion is further provided in the engaging opening, the limiting portion is connected to the side wall and the bottom wall of the engaging opening, and the limiting portion is integrally formed with the dimension measuring plate.

[0011] In some embodiments, the dimension measuring plate and the curvature measuring plate are respectively long strip components, and the side walls adjacent to the dimension measuring plate and the curvature measuring plate are provided with curvature detection lines for detecting the curvature of the protrusion, and the side walls adjacent to the curvature measuring plate and the dimension measuring plate are provided with engagement mouth detection lines for detecting the engagement mouth.

[0012] In some embodiments, a side wall of the size measuring plate close to the curvature measuring plate is further provided with scale lines respectively located on both sides of the engaging opening, and the scale lines extend upward from the bottom wall of the engaging opening.

[0013] In some embodiments, the two side walls and the bottom wall of the engaging opening are respectively provided with a detection fitting powder layer for adhering to the brake shoe latch, and the outer edge of the raised portion of the curvature measuring plate is also provided with a detection fitting powder layer.

[0014] In a possible implementation, an oblong hole is formed through the curvature measuring plate, the major axis of the oblong hole extends along the curvature measuring plate, and the second limit sliders are symmetrically arranged on both sides of the oblong hole.

[0015] In a possible implementation, a vertically penetrating stop groove is provided on the side wall adjacent to the dimension measuring plate and the curvature measuring plate, and a stop block protruding outward and slidingly cooperating with the stop groove is provided on the side wall adjacent to the curvature measuring plate and the dimension measuring plate;

[0016] The cross sections of the limiting groove and the limiting block are respectively rectangular, or the cross sections of the limiting groove and the limiting block are respectively dovetail-shaped.

[0017] In a possible implementation, the first limiting sliding block includes a first sliding rod penetrating the first limiting sliding groove and a first limiting plate connected to the outer end of the first sliding rod to limit the axial position of the first sliding rod;

[0018] The second limiting sliding block includes a second sliding rod that passes through the second limiting sliding groove and a second limiting plate that is connected to the outer end of the second sliding rod to limit the axial position of the first sliding rod.

[0019] In some embodiments, the outer circumferences of the first sliding rod and the second sliding rod are respectively sleeved with flexible friction layers, and the flexible friction layers are slidably matched with the first limiting sliding groove or the second limiting sliding groove.

[0020] Compared with the prior art, the solution shown in the embodiment of the present application is a brake shoe latch maintenance dimension detection tool provided in the embodiment of the present application. The maintenance box is used to accommodate a dimension measuring plate capable of detecting the dimension of the brake shoe latch and a radian measuring plate capable of detecting the radian of the brake shoe latch. The multiple dimension marking points arranged on the dimension measuring plate can detect different parts of the brake shoe latch. The protrusion arranged on the radian measuring plate can be engaged with the inner wall of one side of the arc-shaped notch of the brake shoe latch to detect the radian of the arc-shaped notch itself. The dimension measuring plate and the radian measuring plate are respectively slidably connected to the accommodating cavity of the maintenance box. When needed, they can be slid out of the accommodating cavity respectively and the corresponding dimension or radian can be detected, which effectively improves the detection efficiency and ensures the detection quality of the component. The data measurement is more comprehensive, which greatly improves the maintenance quality of the brake shoe latch. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 A schematic diagram of the main structure of a brake shoe latch inspection and dimension detection tool provided in an embodiment of the present invention (the dimension measuring ruler is in use);

[0023] Figure 2 A schematic diagram of a top view of a brake shoe latch inspection and dimension detection tool provided in an embodiment of the present invention;

[0024] Figure 3 For the embodiment of the present invention Figure 2 The partially enlarged structural diagram of middle Ⅰ;

[0025] Figure 4 A schematic diagram of the main structure of a brake shoe latch inspection and dimension detection tool provided in an embodiment of the present invention (the arc measuring ruler is in use);

[0026] Figure 5 For the embodiment of the present invention Figure 1 Schematic diagram of the structure of a medium-sized measuring ruler;

[0027] Figure 6 For the embodiment of the present invention Figure 5 A rear view structural diagram of ;

[0028] Figure 7 For the embodiment of the present invention Figure 3 Schematic diagram of the structure of the mid-arc measuring ruler;

[0029] Figure 8 For the embodiment of the present invention Figure 7 Schematic diagram of the rear view structure.

[0030] Among them, the reference numerals in the figure are:

[0031] 1. Inspection box; 11. First limit slide; 12. Second limit slide; 2. Dimension measuring plate; 21. First limit slider; 22. Engagement port; 23. Limiting part; 24. Curvature detection line; 25. Graduation line; 26. First slide bar; 27. First limit plate; 28. Limiting groove; 3. Curvature measuring plate; 31. Raised part; 32. Second limit slider; 33. Engagement port detection line; 34. Limiting block; 35. Long round hole; 36. Second slide bar; 37. Second limit plate. DETAILED DESCRIPTION

[0032] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0033] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or indirectly on the other element. It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "back", "top", "bottom", "inside", "outside", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. The terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0034] Please also read Figures 1 to 8Now, the brake shoe latch maintenance dimension detection tooling provided by the present invention is described. The brake shoe latch maintenance dimension detection tool comprises an inspection box 1, a dimension measuring plate 2 and an arc measuring plate 3. The inspection box 1 is provided with a accommodating cavity opening upward, and two opposite side walls of the inspection box 1 are respectively provided with a first limit slide 11 and a second limit slide 12 extending in the up-down direction; the dimension measuring plate 2 is slidably connected in the accommodating cavity, and a first limit slider 21 protruding outward and extending into the first limit slide 11 is provided on one side wall of the dimension measuring plate 2, and the first limit slider 21 is slidably matched with the first limit slide 11, and a plurality of dimension marking points are provided on the upper edge of the dimension measuring plate 2; the arc measuring plate 3 is slidably connected in the accommodating cavity, and a second limit slider 32 protruding outward and extending into the second limit slide 12 is provided on the side wall of the arc measuring plate 3, and the second limit slider 32 is slidably matched with the second limit slide 12, and the upper edge of the arc measuring plate 3 has a protrusion 31 which protrudes upward in an arc shape to detect the curvature of the brake shoe latch.

[0035] The brake shoe latch maintenance dimension detection tool provided in the present embodiment, compared with the prior art, uses an inspection box 1 to accommodate a dimension measuring plate 2 capable of detecting the dimension of the brake shoe latch and a radian measuring plate 3 capable of detecting the radian of the brake shoe latch. The multiple dimension marking points arranged on the dimension measuring plate 2 can detect different parts of the brake shoe latch. The protrusion 31 arranged on the radian measuring plate 3 can be engaged with the inner wall of one side of the arc-shaped notch of the brake shoe latch to detect the radian of the arc-shaped notch itself. The dimension measuring plate 2 and the radian measuring plate 3 are respectively slidably connected to the accommodating cavity of the inspection box 1. When needed, they can be slid out of the accommodating cavity respectively and the corresponding dimension or radian can be detected, which effectively improves the detection efficiency, ensures the detection quality of the component, and the data measurement is more comprehensive, so that the inspection quality of the brake shoe latch is greatly improved.

[0036] In some possible implementations, the characteristic dimension measurement plate 2 is used as follows: Figure 5 and Figure 6 See the structure shown. Figure 5 and Figure 6 The dimension measuring plate 2 is provided with a snap-fitting opening 22 with an opening facing upward and two side walls corresponding to two adjacent dimension marking points respectively. The snap-fitting opening 22 is used to snap-fit ​​to the raised position of the brake shoe latch to detect the size of the raised position.

[0037] In this embodiment, the engaging opening 22 on the dimension measuring plate 2 is used to engage with the raised position of the brake shoe latch. By observing the fit between the raised position and the inner wall of the engaging opening 22, the dimension detection of the raised position is achieved to ensure that the dimension value of the raised position meets the design requirements.

[0038] If the protrusion on the brake shoe latch wobbles in the snap-fit ​​opening 22, or there is a gap between the protrusion and the side wall or bottom wall of the snap-fit ​​opening 22, it means that the size of the protrusion is too small and needs to be trimmed to the designed size. If the protrusion of the brake shoe latch cannot completely enter the snap-fit ​​opening 22, it means that the size of the protrusion is too large and needs to be further polished to reduce its size to the designed size until the protrusion can be snapped into the snap-fit ​​opening 22, completing the size adjustment of the position.

[0039] The above-mentioned inspection tooling is used to inspect the curvature and size of the brake shoe pin to ensure that it meets the process standards and ensures the quality of product inspection. During the inspection process, not only the size but also the curvature is inspected accordingly, making the inspection data more comprehensive, effectively improving the product inspection quality, and at the same time improving the inspection efficiency.

[0040] Specifically, when the previous detection device was used for detection, the inspection time for a single vehicle was five minutes, but now it only takes four minutes, which can effectively improve the inspection efficiency of components, realize the standardized management of detection operations, and has good economic efficiency.

[0041] In some embodiments, the above-mentioned characteristic snap-fit ​​opening 22 can be adopted as follows Figure 5 and Figure 6 See the structure shown. Figure 5 and Figure 6 A limiting portion 23 is further provided in the engaging opening 22 . The limiting portion 23 is connected to the side wall and the bottom wall of the engaging opening 22 , and the limiting portion 23 is integrally formed with the dimension measuring plate 2 .

[0042] In this embodiment, a limiting portion 23 is further provided in the engaging opening 22. The limiting portion 23 is respectively connected to the inner bottom wall and the inner side wall of the engaging opening 22, and has a tendency to protrude toward the middle of the engaging opening 22. It can effectively correspond to the local concave position of the protruding position of the brake shoe latch, thereby ensuring a good engaging effect, realizing the correspondence detection of the corresponding positions, and avoiding the cumulative errors caused by multiple detections.

[0043] Specifically, the limit portion 23 is integrally formed with the dimension measuring plate 2, and the plate thickness of the limit portion 23 is consistent with the thickness of the dimension measuring plate 2. The dimension detection of multiple positions can be achieved through one-time engagement, which helps to improve the detection efficiency, speed up the subsequent adjustment process, and improve the overall dimensional quality of the brake shoe latch.

[0044] In some embodiments, the characteristic dimension measurement plate 2 and the radian measurement plate 3 can be used as follows: Figure 7 and Figure 8 See the structure shown. Figure 7 and Figure 8The dimension measuring plate 2 and the curvature measuring plate 3 are respectively long strip components, and a curvature detection line 24 for detecting the curvature of the protrusion 31 is provided on the side wall adjacent to the dimension measuring plate 2 and the curvature measuring plate 3, and a snap-fitting port detection line 33 for detecting the snap-fitting port 22 is provided on the side wall adjacent to the curvature measuring plate 3 and the dimension measuring plate 2.

[0045] In this embodiment, the dimension measuring plate 2 and the curvature measuring plate 3 are respectively long strip-shaped plate-shaped components, which can effectively reduce the overall occupied space of the tooling while meeting the detection of the corresponding parts of the brake shoe latch, and facilitate the use of the tooling. The opening of the accommodating cavity is also long strip-shaped, so that the dimension measuring plate 2 and the curvature measuring plate 3 can be placed side by side in the accommodating cavity.

[0046] On this basis, the curvature detection line 24 set on the dimension measurement plate 2 is used as a reference line, which can conveniently detect the curvature of the curvature measurement plate 3. After the curvature measurement plate 3 has been used for a period of time, it is easy to be concave or convex due to wear or bumping. At this time, the convex curvature of the curvature measurement plate 3 can be detected through the curvature detection line 24. When it does not conform to the direction of the curvature detection line 24, it needs to be corrected and polished to ensure the accuracy of the measurement data and realize standardized management.

[0047] Similarly, the arc measuring plate 3 is also provided with a snap-fit ​​detection line 33 for detecting the size measuring plate 2 , and its function is similar to that of the arc detection line 24 , which will not be described in detail here.

[0048] In some embodiments, the characteristic dimension measurement plate 2 may be used as follows: Figure 5 and Figure 6 See the structure shown. Figure 2 , a side wall of the size measuring plate 2 close to the curvature measuring plate 3 is further provided with scale lines 25 located on both sides of the engaging opening 22 , and the scale lines 25 extend upward from the bottom wall of the engaging opening 22 .

[0049] When the corresponding part of the brake shoe latch is detected by the engaging opening 22, an accurate measurement effect is required to facilitate subsequent correction. Graduation lines 25 are respectively arranged at the positions of the two side edges of the dimension measuring plate 2 near the engaging opening 22, and the dimension deviation value of the corresponding part can be read according to the graduation lines 25, which is convenient for the subsequent finishing of the brake shoe latch and helps to improve the finishing efficiency.

[0050] On the basis of the above structure, the two side walls and the bottom wall of the engaging opening 22 are respectively provided with a detection bonding powder layer for adhering to the brake shoe latch, and the outer edge of the raised portion 31 of the arc measuring plate 3 is also provided with a detection bonding powder layer.

[0051] After the raised position of the brake shoe latch is inserted into the engaging opening 22, the bonding powder layer can adhere the bonding powder to the outer wall of the raised position of the brake shoe latch. By observing the continuity of the bonding powder at the raised position, the accuracy of the corresponding size of the brake shoe latch can be judged. When no bonding powder is attached to certain positions, it actually means that the size of the position is too small and cannot contact the inner wall or bottom wall of the engaging opening 22. It should be trimmed to meet the size requirements. The provision of the bonding powder layer effectively improves the detection efficiency of the brake shoe latch, facilitates more intuitive observation of the detection results, avoids the limitations of light and vision, and ensures the accuracy of the measurement data.

[0052] In some possible implementations, the characteristic curvature measurement plate 3 is used as follows: Figure 7 and Figure 8 See the structure shown. Figure 7 and Figure 8 An oblong hole 35 is formed through the arc measuring plate 3 , the major axis of the oblong hole 35 extends along the direction of the arc measuring plate 3 , and the second limit sliders 32 are symmetrically arranged on both sides of the oblong hole 35 .

[0053] In this embodiment, when the arc notch of the brake shoe pin is detected by using the arc measuring plate 3, in order to make the placement position of the arc measuring plate 3 more accurate, a through oblong hole 35 is provided on the arc measuring plate 3. The oblong hole 35 can be used to align with the positioning point below the arc notch to achieve good centering, thereby ensuring the accuracy of the arc detection and further ensuring the quality of the subsequent correction of the brake shoe pin.

[0054] The two second limit sliders 32 are respectively located on both sides of the oblong hole 35 , so as to ensure the smooth sliding of the arc measurement plate 3 in the accommodating cavity and improve the measurement efficiency.

[0055] In some possible implementations, the characteristic dimension measurement plate 2 and the radian measurement plate 3 are used as follows: Figure 3 , Figure 6 and Figure 7 See the structure shown. Figure 3 , Figure 6 and Figure 7 A stopper groove 28 extending vertically through the side wall of the dimension measuring plate 2 adjacent to the radian measuring plate 3 is provided, and a stopper block 34 protruding outward and slidingly cooperating with the stopper groove 28 is provided on the side wall of the radian measuring plate 3 adjacent to the dimension measuring plate 2;

[0056] The cross sections of the limiting groove 28 and the limiting block 34 are respectively rectangular, or the cross sections of the limiting groove 28 and the limiting block 34 are respectively dovetail-shaped.

[0057] In the process of sliding out or pushing in from the accommodating groove, in addition to the limiting effect between the first limiting slider 21 and the first limiting groove 11, the second limiting slider 32 and the second limiting groove 12, a limiting groove 28 and a limiting block 34 are also arranged between the dimension measuring plate 2 and the curvature measuring plate 3. Through the cooperation of the limiting groove 28 and the limiting block 34, the dimension measuring plate 2 and the curvature measuring plate 3 maintain effective fit between adjacent side walls, thereby ensuring the stability of the structure of the detection tooling itself and improving the accuracy of the detection.

[0058] In some possible implementations, the first limit slider 21 and the second limit slider 32 are as follows: Figure 3 See the structure shown. Figure 3 The first limiting slider 21 includes a first slide rod 26 that passes through the first limiting slide groove 11 and a first limiting plate 27 that is connected to the outer end of the first slide rod 26 to limit the axial position of the first slide rod 26;

[0059] The second limiting sliding block 32 includes a second sliding rod 36 penetrating the second limiting sliding groove 12 and a second limiting plate 37 connected to the outer end of the second sliding rod 36 to limit the axial position of the first sliding rod 26 .

[0060] In some embodiments, the first slide bar 26 and the second slide bar 36 may be configured as follows: Figure 3 See the structure shown. Figure 3 The outer circumferences of the first slide bar 26 and the second slide bar 36 are respectively sleeved with flexible friction layers, and the flexible friction layers are slidably matched with the first limiting slide groove 11 or the second limiting slide groove 12.

[0061] In this embodiment, the first limit slider 21 is in the form of a combination of a first slide bar 26 and a first limit plate 27, and the sliding cooperation between the first slide bar 26 and the first limit slide groove 11 is used to realize the sliding out of the dimension measuring plate 2 from the receiving groove or the sliding into the receiving groove. The setting of the first limit plate 27 effectively limits the position of the dimension measuring plate 2 to prevent it from lateral shaking, ensures the stability of the position in the receiving groove, and facilitates smooth extraction and pushing. Similarly, the second slide bar 36 and the second limit plate 37 have similar structures and functions, which will not be repeated here.

[0062] On this basis, a flexible friction layer is also sleeved on the outer periphery of the first slide bar 26 and the second slide bar 36. There is a certain friction force between the outer peripheral wall of the flexible friction layer and the inner wall of the first limiting slide groove 11 or the second limiting slide groove 12, so that the first slide bar 26 has a certain position stability in the first limiting slide groove 11, which is convenient for good stability when using the size measuring plate 2 or the curvature measuring plate 3 for detection.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. Brake shoe latch inspection and dimension detection tool, characterized in that: include: The inspection box is provided with a receiving cavity opening upward, and two opposite side walls of the inspection box are respectively provided with a first limiting slide groove and a second limiting slide groove extending in the up-down direction; A dimension measuring plate is slidably connected to the accommodating cavity, a first limiting slider protruding outward and extending into the first limiting sliding groove is provided on one side wall of the dimension measuring plate, the first limiting slider is slidably matched with the first limiting sliding groove, and a plurality of dimension marking points are provided on the upper edge of the dimension measuring plate; A curvature measuring plate is slidably connected in the accommodating cavity, a second limit slider protruding outward and extending into the second limit slide groove is provided on the side wall of the curvature measuring plate, the second limit slider is slidably matched with the second limit slide groove, and the upper edge of the curvature measuring plate has a protrusion protruding upward in an arc shape to detect the curvature of the brake shoe latch; Wherein, the dimension measuring plate is provided with a snap-fitting opening with an opening upward and two side walls corresponding to two adjacent dimension marking points respectively, and the snap-fitting opening is used to snap-fit ​​to the raised position of the brake shoe latch to detect the size of the raised position; a limiting portion is also provided in the snap-fitting opening, and the limiting portion is connected to the side wall and the bottom wall of the snap-fitting opening; a curvature detection line for detecting the curvature of the raised portion is provided on the side wall of the dimension measuring plate adjacent to the curvature measuring plate, and scale lines respectively located on both sides of the snap-fitting opening are also provided on a side wall of the dimension measuring plate close to the curvature measuring plate; A snap-fitting port detection line for detecting the snap-fitting port is provided on a side wall of the arc measurement plate adjacent to the size measurement plate.

2. The brake shoe latch inspection and dimension detection tool as claimed in claim 1, characterized in that: The limiting portion and the dimension measuring plate are integrally formed.

3. The brake shoe latch inspection and dimension detection tool as claimed in claim 1, characterized in that: The size measuring plate and the curvature measuring plate are respectively long strip-shaped components.

4. The brake shoe latch inspection and dimension detection tool as claimed in claim 1, characterized in that: The scale line extends upward from the bottom wall of the engaging opening.

5. The brake shoe latch inspection and dimension detection tool as claimed in claim 1, characterized in that: The two side walls and the bottom wall of the engaging opening are respectively provided with a detection bonding powder layer for adhering to the brake shoe latch, and the outer edge of the raised portion of the curvature measuring plate is also provided with a detection bonding powder layer.

6. The brake shoe latch inspection and dimension detection tool as claimed in any one of claims 1 to 5, characterized in that: The arc measuring plate is penetrated by an oblong hole, the major axis of the oblong hole extends along the direction of the arc measuring plate, and the second limit sliding blocks are symmetrically arranged on both sides of the oblong hole.

7. The brake shoe latch inspection and dimension detection tool as claimed in any one of claims 1 to 5, characterized in that: A vertically penetrating limiting groove is provided on the side wall of the dimension measuring plate adjacent to the curvature measuring plate, and a limiting block protruding outward and slidingly cooperating with the limiting groove is provided on the side wall of the curvature measuring plate adjacent to the dimension measuring plate; The cross sections of the limiting groove and the limiting block are respectively rectangular, or the cross sections of the limiting groove and the limiting block are respectively dovetail-shaped.

8. The brake shoe latch inspection and dimension detection tool as claimed in any one of claims 1 to 5, characterized in that: The first limiting sliding block includes a first sliding rod arranged through the first limiting sliding groove and a first limiting plate connected to the outer end of the first sliding rod to limit the axial position of the first sliding rod; The second limiting sliding block includes a second sliding rod penetrating the second limiting sliding groove and a second limiting plate connected to the outer end of the second sliding rod to limit the axial position of the first sliding rod.

9. The brake shoe latch inspection and dimension detection tool as claimed in claim 8, characterized in that: The outer circumferences of the first sliding rod and the second sliding rod are respectively sleeved with flexible friction layers, and the flexible friction layers are slidably matched with the first limiting sliding groove or the second limiting sliding groove.

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