Stud height testing fixture

Abstract

The utility model provides a stud height testing fixture. The stud height testing fixture comprises a testing fixture main body, an upper difference detection mechanism and a lower difference detection mechanism. Wherein the testing fixture main body comprises a fixed disc and a stand column. The fixing disc is used for being fixed to a hub. The extending direction of the stand column is consistent with the height direction of the stud. The lower difference detection mechanism and the upper difference detection mechanism are both rotatably arranged on the stand column of the detection tool main body. The upper difference detection mechanism and the lower difference detection mechanism are sequentially arranged from top to bottom in the extending direction of the stand column. The lower difference detection mechanism is provided with a first reference surface corresponding to the lowest allowable height of the stud. The upper difference detection mechanism is provided with a second reference surface corresponding to the highest allowable height of the stud, and the height difference between the first reference surface and the second reference surface meets the tolerance range of the stud. Through the arrangement of the stud height gauge, whether the installation height of the stud arranged on the hub is qualified or not can be accurately and rapidly detected.

Description

Stud height gauge Technical Field

[0001] This utility model relates to the field of automotive technology, and in particular to a stud height measuring tool. Background Technology

[0002] The wheel hub is a crucial component in a car's transmission system, responsible for driving the vehicle. Currently, wheel hubs typically have multiple studs that connect the hub to other components. The height of the studs after installation on the hub must be within tolerance limits; that is, it should not exceed the upper limit or fall below the lower limit. If the stud height exceeds the upper limit, it may interfere with other components, preventing the wheel hub from being installed. If the stud height is below the lower limit, the connection between the wheel hub and other components may be insecure, leading to loosening of the hub or other parts, posing a significant safety hazard.

[0003] Existing devices for detecting stud height typically have a stepped structure, including a groove for accommodating the stud, with upper and lower stepped surfaces on the circumferential side of the groove. Operators visually inspect whether the highest point of the stud lies between the two stepped surfaces to determine if the stud is installed correctly. This detection method is susceptible to factors such as viewing angle deviation or lighting interference, resulting in inaccurate stud height detection and potentially significant errors. Summary of the Invention

[0004] One objective of this invention is to provide a stud height gauge for accurately detecting the height of studs installed on wheel hubs, so as to adjust the stud height in a timely manner and ensure that the installation height of the studs is within the tolerance range.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A stud height gauge for detecting the installation height of studs mounted on a wheel hub, comprising:

[0007] The main body of the inspection fixture includes a fixed plate and a column. The fixed plate is used to fix the fixture to the hub. The stud is located on the outer periphery of the fixed plate. The column is vertically arranged on the fixed plate. The height direction of the column is consistent with the height direction of the stud.

[0008] The lower deviation detection mechanism is rotatably mounted on the main body of the inspection fixture. The lower deviation detection mechanism is provided with a first reference surface, which corresponds to the minimum allowable height of the stud.

[0009] The upper differential detection mechanism is rotatably mounted on the main body of the fixture. The upper differential detection mechanism is provided with a second reference surface, which corresponds to the maximum allowable height of the stud. The upper differential detection mechanism and the lower differential detection mechanism are arranged sequentially from top to bottom along the height direction of the column. The height difference between the first reference surface and the second reference surface meets the tolerance range of the stud.

[0010] In some exemplary embodiments, the differential detection mechanism includes:

[0011] The lower body is rotatably mounted on the main body of the inspection fixture;

[0012] The lower detection part is rotatably mounted on the lower body. The first reference surface is the surface of the lower detection part near the fixed plate. When the height of the stud is higher than the first reference surface, the lower detection part rotates relative to the column while following the lower body. At the same time, the stud blocks the rotation of the lower detection part, so that the lower detection part rotates relative to the lower body.

[0013] In some exemplary embodiments, the lower detection unit includes a detection plate and a rotating shaft, the first reference surface is the surface of the detection plate near the fixed disk, the rotating shaft is connected to the detection plate, and the rotating shaft is rotatably disposed inside the lower body.

[0014] In some exemplary embodiments, the lower differential detection mechanism includes a limiting member, the lower body is provided with a mounting hole, the fixed shaft is provided with a groove along its circumference, and the end of the limiting member passes through the mounting hole and is accommodated in the groove.

[0015] In some exemplary embodiments, the detection piece is provided with an arc-shaped hole, the lower differential detection mechanism includes a positioning member, the positioning member passes through the arc-shaped hole and is installed on the lower body, the detection piece has an initial position, the end of the detection piece away from the fixing member is a tip, and when the tip, the positioning member and the column are in the same straight line, the detection piece is in the initial position.

[0016] In some exemplary embodiments, multiple lower detection units are provided, and the multiple lower detection units are arranged at intervals along the circumference of the lower body; a weight reduction groove is provided between each pair of adjacent lower detection units, and the side wall of the lower body is recessed in the direction of the column to form the weight reduction groove.

[0017] In some exemplary embodiments, the lower differential detection mechanism, the upper differential detection mechanism, and the fixed disk are concentrically arranged, and the maximum radial length of the lower differential detection mechanism is greater than the maximum radial length of the fixed disk, and the maximum radial length of the upper differential detection mechanism is greater than the maximum radial length of the fixed disk.

[0018] In some exemplary embodiments, the differential detection mechanism includes:

[0019] The upper body is rotatably mounted on the column;

[0020] An upper detection unit is disposed at the end of the upper body away from the column. The second reference surface is the surface of the upper detection unit near the fixed plate. When the height of the stud exceeds the second reference surface, the stud abuts against the upper detection unit.

[0021] In some exemplary embodiments, the upper detection part is movably disposed on the upper body so that when the stud abuts against the upper detection part, the upper detection part rotates relative to the upper body.

[0022] In some exemplary embodiments, the upper detection mechanism includes a reset member, one end of which is connected to the upper body and the other end of which is connected to the upper detection part. After the upper detection part rotates relative to the upper body, the upper detection part can be automatically reset by the reset member.

[0023] In some exemplary embodiments, there are two upper detection units, and the two lower detection units are respectively disposed at opposite ends of the upper detection units.

[0024] In some exemplary embodiments, the fixture body includes at least one pair of grips for an operator to hold, each pair of grips including two handles, the two handles being disposed on opposite sides of the fixed plate such that the two handles and the column are on the same straight line.

[0025] In some exemplary embodiments, the lower differential detection mechanism includes a first bearing, and the upper differential detection mechanism includes a second bearing, both of which are mounted on the column; the fixture body includes a sleeve, which is disposed between the first bearing and the second bearing.

[0026] As can be seen from the above technical solution, this utility model has at least the following advantages and positive effects:

[0027] This utility model discloses a stud height gauge, comprising a gauge body, an upper differential detection mechanism, and a lower differential detection mechanism. The gauge body is used to fix the stud to a wheel hub. The lower differential detection mechanism has a first reference surface corresponding to the minimum allowable height of the stud. The upper differential detection mechanism has a second reference surface corresponding to the maximum allowable height of the stud. The height difference between the first and second reference surfaces meets the tolerance range of the stud; therefore, if the stud height exceeds the first reference surface but is lower than the second reference surface, it indicates that the stud's installation height is qualified.

[0028] Furthermore, both the upper and lower tolerance detection mechanisms are rotatably mounted on the fixture body. Therefore, if the upper tolerance detection mechanism interferes with the stud when rotated, it indicates that the stud height exceeds the upper limit of the tolerance range, and the stud installation is unqualified, requiring adjustment. If the lower tolerance detection mechanism does not contact the stud when rotated, it indicates that the stud height is below the lower limit of the tolerance range, and the stud installation is unqualified, requiring adjustment. Compared to the existing technology that uses visual inspection to detect stud height, this application provides a more intuitive and accurate way to detect and determine whether the stud installation is qualified. Operators only need to observe whether the upper and lower tolerance detection mechanisms interfere with the stud to accurately and quickly determine whether the stud height on the wheel hub is qualified. Attached Figure Description

[0029] Figure 1 is a three-dimensional structural schematic diagram of a stud height gauge according to an embodiment of the present invention.

[0030] Figure 2 is a cross-sectional view of the stud height gauge shown in Figure 1 installed on a wheel hub with studs.

[0031] Figure 3 is a schematic diagram of the stud height gauge shown in Figure 2.

[0032] Figure 4 is a structural schematic diagram of the stud height gauge shown in Figure 2 from another perspective.

[0033] Figure 5 is a perspective view of the stud height gauge shown in Figure 1.

[0034] Figure 6 is a structural schematic diagram of the main body of the stud height gauge shown in Figure 1, as well as the first bearing and the second bearing.

[0035] Figure 7 is a side view of the main body of the inspection fixture shown in Figure 1.

[0036] Figure 8 is a top view of the main body of the inspection fixture described in Figure 1.

[0037] Figure 9 is a perspective view of the under-displacement detection mechanism in the stud height gauge shown in Figure 1.

[0038] Figure 10 is a perspective view of the differential detection mechanism shown in Figure 9 from another angle.

[0039] Figure 11 is a magnified view of part A in Figure 10.

[0040] Figure 12 is a top view of the differential detection mechanism shown in Figure 1.

[0041] Figure 13 is a perspective view of the upper difference detection mechanism in the stud height gauge shown in Figure 1.

[0042] Figure 14 is a structural schematic diagram of the differential detection mechanism shown in Figure 13 from another angle.

[0043] Figure 15 is a top view of the differential detection mechanism shown in Figure 13.

[0044] The reference numerals in the attached drawings are explained as follows: 100, stud height gauge; 10, gauge body; 11, fixed plate; 111, plate body; 112, boss; 112a, inclined surface; 113, weight reduction hole; 114, first mounting hole; 12, grip; 121, handle; 13, column; 131, second mounting hole; 132, countersunk groove; 133, first column; 134, second column; 14, mounting component; 15, sleeve; 16, first pressure cap; 17, fixing component; 20, lower deviation detection mechanism; 21, lower body; 22, first bearing; 23, elastic retaining ring; 24, first reference surface. ; 25. Lower detection part; 251. Detection piece; 251a. Arc-shaped hole; 251b. Tip; 252. Rotating shaft; 253. Groove; 26. Limiting component; 27. Positioning component; 28. Weight reduction groove; 30. Upper differential detection mechanism; 31. Upper body; 311. Assembly hole; 312. First hook; 32. Second bearing; 33. Second pressure cap; 331. Cover body; 332. Protruding edge; 34. Screw; 35. Second reference surface; 36. Upper detection part; 361. Second hook; 37. Fastener; 38. Reset component; 200. Hub; 210. Hole; 300. Stud. Detailed Implementation

[0045] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0046] In the description of this application, it should be understood that, in the embodiments shown in the accompanying drawings, the indications of direction or positional relationships (such as up, down, left, right, front, and back) are merely for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the accompanying drawings. If the description of the positions of these elements changes, these directional indications also change accordingly.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] Please refer to Figures 1 and 2. This utility model provides a stud height gauge 100, which can detect the installation height of the studs 300 set on the hub 200, so as to quickly and accurately determine whether the bolt installation is qualified, which greatly improves the detection efficiency and detection quality. The specific solution is described in the following embodiments.

[0049] It should be noted that the stud 300 set on the hub 200 can be a double-ended stud, a fully threaded stud, etc.

[0050] Referring to Figures 3 to 5, the stud height gauge 100 includes a gauge body 10, an upper tolerance detection mechanism 30, and a lower tolerance detection mechanism 20. The gauge body 10 is fixed to the wheel hub 200. The height direction of the gauge body 10 is consistent with the height direction of the stud 300. Both the upper tolerance detection mechanism 30 and the lower tolerance detection mechanism 20 are mounted on the gauge body 10. The gauge body 10, the lower tolerance detection mechanism 20, and the upper tolerance detection mechanism 30 work together to ensure that the lower tolerance detection mechanism 20 can detect whether the installation height of the stud 300 is lower than the lower limit of the tolerance range, and the upper tolerance detection mechanism 30 can detect whether the installation height of the stud 300 is higher than the upper limit of the tolerance range.

[0051] Specifically, referring to Figures 6 and 7 and in conjunction with Figure 2, the main body 10 of the gauge includes a fixing plate 11. The fixing plate 11 is used to fix it to the hub 200. Multiple studs 300 are typically provided on the hub 200, and these studs 300 are spaced apart circumferentially on the hub 200. The hub 200 typically has holes 210, and the fixing plate 11 mates with these holes 210 to integrally install and fix the stud height gauge 100 to the hub 200, ensuring that the studs 300 are located on the outer periphery of the fixing plate 11. This embodiment uses a circular hole 210 as an example for explanation.

[0052] Specifically, in this embodiment, the fixing plate 11 includes a plate body 111 and a boss 112. The boss 112 protrudes from one side surface of the plate body 111. The plate body 111 can contact the surface of the hub 200, and the boss 112 can be accommodated in the hole 210 on the hub 200. The boss 112 is circular, and the diameter of the boss 112 matches the inner diameter of the hole 210 on the hub 200, resulting in a small distance between the outer peripheral wall of the boss 112 and the inner peripheral wall of the hole 210. Therefore, the fixing plate 11 can be accurately installed on the hub 200, and it can also effectively prevent the stud height gauge 100 from becoming loose when using it to inspect the stud 300, which helps to ensure the stability and accuracy of the entire gauge.

[0053] In some embodiments, the boss 112 has an inclined surface 112a on the side edge opposite to the disc body 111, and the inclined surface 112a is inclined from the outer periphery of the disc body 111 toward the center of the boss 112. The inclined surface 112a has a guiding function, which facilitates the quick installation and fixation of the fixing disc 11 onto the hub 200.

[0054] It should be noted that in this embodiment, the disc body 111 is circular in shape, and its diameter is larger than the diameter of the boss 112. In other embodiments, the shape of the disc body 111 can be set according to actual needs, and is not limited here.

[0055] As shown in Figure 8, in some embodiments, the disc body 111 is provided with at least one weight-reducing hole 113 to reduce the weight of the fixed disc 11, which is beneficial to the overall lightweighting of the stud height gauge 100, thereby facilitating the installation and disassembly of the stud height gauge 100 and the hub 200.

[0056] In some embodiments of this application, the gauge body 10 includes at least one pair of grips 12. The grips 12 are for the operator to hold, so as to facilitate the operator to pick up and put down the stud height gauge 100 through the grips 12.

[0057] Furthermore, each pair of grips 12 includes two handles 121, which are located on opposite sides of the disc body 111. The handles 121 extend beyond the sidewalls of the disc body 111 in the radial direction to facilitate gripping by the operator. The two handles 121 and the column 13 are aligned on the same straight line to ensure even force distribution when the operator picks up and places the stud height gauge 100, thus facilitating effortless operation.

[0058] Referring to Figures 6 and 7, the main body 10 of the inspection fixture includes a column 13. The column 13 is vertically mounted on the fixed plate 11. The height direction of the column 13 is consistent with the height direction of the stud 300. Preferably, the column 13 is vertically mounted at the center of the fixed plate 11.

[0059] For example, the mounting plate 11 has a first mounting hole 114. The bottom of the column 13 has a second mounting hole 131 (not shown in the figure). The mounting member 14 passes through the first mounting hole 114 and the second mounting hole 131, so that the column 13 can be mounted on the mounting plate 11. The mounting member 14 can be a screw, bolt, etc.

[0060] Furthermore, the first mounting hole 114 can be a countersunk hole so that at least part of the end of the mounting member 14 can be accommodated in the countersunk hole, thus avoiding the end of the mounting member 14 from protruding excessively and affecting the assembly between the fixing plate 11 and the wheel hub 200 when the installation height of the stud 300 on the wheel hub 200 with some shallow hole positions 210 is detected.

[0061] In some embodiments, the fixing plate 11 is further provided with a recess 132, which communicates with the first mounting hole 114. The bottom of the column 13 is accommodated in the recess 132. The recess 132 helps to enhance the stability of the column 13 and also has a positioning function, facilitating the assembly of the column 13 and the fixing plate 11.

[0062] The differential detection mechanism 20 is rotatably mounted on the column 13. For example, referring to Figure 7, the column 13 includes a first column 133 and a second column 134, with the diameter of the first column 133 being larger than the diameter of the second column 134. Therefore, a stepped structure is formed at the junction of the first column 133 and the second column 134. Referring to Figure 9, the differential detection mechanism 20 includes a lower body 21 and a first bearing 22 disposed inside the lower body 21. Referring to Figure 6, the first bearing 22 is sleeved on the outer periphery of the second column 134, and the first bearing 22 abuts against the surface of the first column 133. It can be understood that the stepped structure provides axial support for the first bearing 22, thereby effectively preventing the differential detection mechanism 20 from moving towards the fixed disk 11.

[0063] It should be noted that the first bearing 22 can be a deep groove ball bearing, cylindrical roller bearing, tapered roller bearing, self-aligning roller bearing, etc., and can be set according to actual needs. No restrictions are imposed here.

[0064] Referring to Figure 9, in some embodiments, the differential detection mechanism 20 may also include an elastic retaining ring 23 to further restrict the axial movement of the differential detection mechanism 20.

[0065] It should be noted that in other embodiments, the differential detection mechanism 20 can also be installed and fixed on the column 13 in other ways, such as by cold pressing or hot fitting the first bearing 22 to the column 13, as long as the differential detection mechanism 20 can be stably installed on the column 13.

[0066] Referring to Figure 10 and in conjunction with Figure 3, the differential detection mechanism 20 is concentrically arranged with the fixed plate 11, and the maximum radial length of the differential detection mechanism 20 is greater than the maximum radial length of the fixed plate 11. The differential detection mechanism 20 has a first reference surface 24, which corresponds to the minimum allowable height of the stud 300 mounted on the hub 200. In other words, the highest point of the stud 300 should not be lower than the first reference surface 24. If rotating the differential detection mechanism 20 does not abut against the stud 300, it means that the installation height of the stud 300 is lower than the lower limit of the tolerance range, and the installation height of the stud 300 needs to be increased. Conversely, if the differential detection mechanism 20 abuts against the stud 300, it indicates that the installation height of the stud 300 is not lower than the lower limit of the tolerance range.

[0067] Further, referring to Figure 10 and in conjunction with Figure 1, the lower detection mechanism 20 includes a lower detection part 25, and the first reference surface 24 is the surface of the lower detection part 25 near the fixed plate 11. The lower detection part 25 is disposed on the lower body 21, so the lower detection part 25 can rotate relative to the column 13 as the lower body 21 rotates. The lower detection part 25 is disposed away from the column 13. If the installation height of the stud 300 is qualified, the lower detection part 25 can abut against the stud 300.

[0068] The lower detection unit 25 is rotatably mounted on the lower main body 21. Therefore, when the lower detection unit 25 rotates relative to the column 13 along with the lower main body 21, if the installation height of the stud 300 is within the tolerance range, the stud 300 will resist the rotation of the lower detection unit 25, causing the lower detection unit 25 to rotate relative to the lower main body 21. Therefore, by rotating the lower main body 21 and checking whether the lower detection unit 25 rotates relative to the lower main body 21, it is possible to quickly determine whether the installation height of the stud 300 is lower than the minimum allowable height setting.

[0069] Referring to Figures 10 and 11, in some embodiments, the lower detection unit 25 includes a detection piece 251 and a rotating shaft 252. The rotating shaft 252 is connected to the detection piece 251 and protrudes from one side of the detection piece 251. The lower body 21 is provided with a mounting groove, the opening of which faces away from the fixed plate 11. The rotating shaft 252 is rotatably disposed within the mounting groove of the lower body 21. The detection piece 251 is disposed on the outside of the lower body 21, and the first reference surface 24 is the surface of the detection piece 251 closest to the fixed plate 11. If the installation height of the stud 300 is qualified, when the lower body 21 is rotated, the detection piece 251 of the lower detection unit 25 contacts the stud 300 and interferes with the rotation of the detection piece 251, causing the detection piece 251 to rotate relative to the lower body 21.

[0070] Furthermore, the rotating shaft 252 has a groove 253 along its circumference. The lower differential detection mechanism 20 includes a limiting member 26. The lower body 21 has a mounting hole that communicates with the groove 253, so that the end of the limiting member 26 can be accommodated in the groove 253 through the mounting hole. In the axial direction along the rotating shaft 252, the limiting member 26 abuts against the rotating shaft 252.

[0071] The groove 253 and the limiting member 26 work together to not only fix the lower detection part 25 to the lower main body 21, but also effectively restrict the up-and-down movement of the detection piece 251 while ensuring the flexible rotation of the detection piece 251. This ensures the stability of the first reference surface 24 on the detection piece 251 and guarantees the detection quality of the lower differential detection mechanism 20. The limiting member 26 can be a screw, stud, etc.

[0072] Referring to Figure 12, in some embodiments, the detection piece 251 has an arc-shaped hole 251a. The lower differential detection mechanism 20 includes a positioning member 27. The lower body 21 has a connecting hole. The positioning member 27 passes through the arc-shaped hole 251a and is accommodated in the connecting hole. The opposite sides of the detection piece 251 are inclined so that the end of the detection piece 251 away from the positioning member 27 forms a pointed tip 251b.

[0073] The detection piece 251 has an initial position. Specifically, the tip 251b, the positioning member 27, and the column 13 are on the same straight line. At this time, the detection piece 251 is in the initial position, and the fixing member 17 is located at one end of the limiting hole.

[0074] After the lower detection mechanism 20 detects the installation height of the stud 300, the tip 251b of the detection plate 251 and the setting of the fixing member 17 can directly display the detection result of the lower detection mechanism 20 detecting the installation height of the stud 300. The operator can quickly determine whether the installation height of the stud 300 is lower than the minimum allowable height setting by observing whether the detection plate 251 is in the initial position.

[0075] Specifically, if the installation height of the stud 300 is not lower than the minimum allowable height of the stud 300, then when the lower body 21 is rotated, the stud 300 will interfere with the rotation of the detection piece 251, causing the detection piece 251 to deflect relative to the lower body 21, and causing the tip 251b of the detection piece 251 to deviate from the straight line of the column 13 and the fixing member 17. If the installation height of the stud 300 is lower than the minimum allowable height of the stud 300, when the lower body 21 is rotated, the detection piece 251 rotates with the lower body 21, and the detection piece 251 and the lower body 21 remain relatively stationary, so that the tip 251b of the detection piece 251, the fixing member 17, and the column 13 always remain on the same straight line.

[0076] Furthermore, the arc-shaped hole 251a and the fixing member 17 work together to facilitate the rapid return of the detection piece 251 to its initial position without restricting the rotation of the detection piece 251 relative to the lower body 21. The operator only needs to rotate the detection piece 251 so that the fixing member 17 is located at one end of the arc-shaped hole 251a, making the operation convenient and quick.

[0077] Referring again to Figure 12, multiple lower detection units 25 are provided, and these units are spaced apart circumferentially along the lower main body 21. It should be noted that the specific number of lower detection units 25 can be the same as the number of studs 300 provided on the hub 200. Therefore, each lower detection unit 25 detects one stud 300. The lower main body 21 only needs to be rotated by a small angle, such as 45 degrees, just enough to rotate the detection piece 251 from one side of the stud 300 to the other side. This arrangement effectively improves the detection efficiency of the lower detection mechanism 20. The accompanying drawings of this application illustrate an example with eight lower detection units 25.

[0078] In some embodiments, the lower defect detection mechanism 20 includes a weight-reducing groove 28. Exemplarily, a weight-reducing groove 28 is provided between every two adjacent lower detection sections 25. The weight-reducing groove 28 is recessed from the side wall of the lower body 21 toward the column 13, causing the lower defect detection mechanism 20 to form a petal-shaped structure. This arrangement reduces the weight of the lower defect detection mechanism 20, facilitating operation by the operator while ensuring the structural strength of the lower body 21 and simplifying its machining.

[0079] It should be noted that in other embodiments, the weight reduction groove 28 is provided in other structural forms. For example, the weight reduction groove 28 is provided as a recess on the surface of the lower body 21 in the direction of axial extension of the column 13 toward the fixed plate 11, etc. The specific configuration can be determined according to actual needs.

[0080] The lower differential detection mechanism 20 and the upper differential detection mechanism 30 are arranged sequentially from bottom to top along the axial direction of the column 13. Specifically, the upper differential detection mechanism 30 is positioned above the lower differential detection mechanism 20. The upper differential detection mechanism 30 is rotatably mounted on the column 13. For example, the upper differential detection mechanism 30 is positioned at the top of the column 13, and the lower differential detection mechanism 20 is positioned at the middle of the column 13.

[0081] Referring to Figure 13 and in conjunction with Figure 3, the upper differential detection mechanism 30 is concentrically arranged with the fixed plate 11. The upper differential detection mechanism 30 includes an upper body 31 and a second bearing 32 disposed inside the upper body 31. The second bearing 32 is disposed on the column 13 in the fixture body 10. The fixture body 10 includes a sleeve 15, which is sleeved on the outer periphery of the column 13. One end of the sleeve 15 abuts against the first bearing 22 in the lower differential detection mechanism 20, and the other end of the sleeve 15 is connected to the second bearing 32 in the upper differential detection mechanism 30. In other words, the sleeve 15 is disposed between the first bearing 22 and the second bearing 32. The first bearing 22 supports the sleeve 15, and the sleeve 15 in turn stably supports the second bearing 32, thereby achieving a stable installation of the upper differential detection mechanism 30 on the column 13.

[0082] The second bearing 32 can be a deep groove ball bearing, cylindrical roller bearing, tapered roller bearing, self-aligning roller bearing, etc., and can be set according to actual needs. No restrictions are imposed here.

[0083] As shown in Figure 6, in some embodiments, the main body 10 of the inspection fixture includes a first pressure cap 16 and a fixing member 17. The first pressure cap 16 has a through hole for the fixing member 17 to pass through. The top end of the column 13 has a fixing hole. The fixing member 17 passes through the through hole and is accommodated in the fixing hole, so that the first pressure cap 16 presses against the surface of the second bearing 32 away from the first bearing 22, thereby fastening the second bearing 32 to the column 13 and preventing the second bearing 32 from moving along the axial direction of the column 13 when rotating, effectively ensuring the inspection quality of the upper differential detection mechanism 30.

[0084] Referring to Figures 13 and 14, in some embodiments of this application, the upper body 31 of the differential detection mechanism 30 is provided with an assembly hole 311, and the second bearing 32 is disposed within the assembly hole 311. The differential detection mechanism 30 includes a second pressure cover 33. The second pressure cover 33 includes a cover body 331 and a protruding edge 332 on the cover body 331. The cover body 331 can be mounted on the upper body 31 by screws 34. The protruding edge 332 is accommodated in the assembly hole 311 of the upper body 31, and the end of the protruding edge 332 facing away from the cover body 331 contacts the surface of the second bearing 32, thereby further restricting the movement of the second bearing 32 along the axial direction of the column 13 when it rotates.

[0085] The second pressure cap 33 seals one end of the assembly hole 311 of the upper body 31, effectively preventing dust and other impurities from entering the interior of the upper body 31 and affecting the overall rotation of the upper differential detection mechanism 30, which is conducive to extending the service life of the upper differential detection mechanism 30.

[0086] In some embodiments, the cover 331 of the second pressure cover 33 may also be provided with a clearance hole for the fastener 17.

[0087] The maximum radial length of the upper differential detection mechanism 30 is greater than the maximum radial length of the fixed plate 11. The upper differential detection mechanism 30 has a second reference surface 35, which corresponds to the maximum permissible height of the stud 300 mounted on the hub 200. In other words, the highest point of the stud 300 should not exceed the second reference surface 35. If the upper differential detection mechanism 30 rotates smoothly without contacting the stud 300, it indicates that the highest point of the stud 300 has not exceeded the upper limit of the tolerance range. Conversely, if the stud 300 interferes with the rotation of the upper differential detection mechanism 30, it means that the installation height of the stud 300 exceeds the upper limit of the tolerance range, and the installation height of the stud 300 needs to be lowered.

[0088] It is understandable that the height difference between the first reference plane 24 and the second reference plane 35 meets the tolerance range of the stud 300.

[0089] Referring to Figure 13 and in conjunction with Figure 1, the upper detection mechanism 30 includes an upper detection section 36. The upper detection section 36 is located at the end of the upper body 31 away from the column 13.

[0090] For example, the upper detection mechanism 30 includes a fastener 37. The upper body 31 has a threaded hole, and the upper detection part 36 has an assembly hole 311. The fastener 37 passes through the assembly hole 311 and then mates with the threaded hole, thereby mounting the upper detection part 36 onto the upper body 31. In some embodiments, the bottom of the upper detection part 36 near the upper body 31 may have a notch, forming an inverted step structure at that end. The assembly hole 311 is provided on the inverted step structure. The end of the upper body 31 near the upper detection part 36 can be a stepped structure, and the threaded hole is provided on the stepped structure. The inverted step structure fits into the stepped structure, allowing the fastener 37 to pass through the assembly hole 311 and then mate with the threaded hole, thereby mounting the upper detection part 36 onto the upper body 31. The inverted step structure and the stepped structure ensure the stability of the upper detection part 36 while also maintaining the height difference between the second reference surface 35 and the first reference surface 24.

[0091] The upper detection unit 36 ​​can rotate relative to the column 13, moving with the upper body 31. The second reference surface 35 is the surface of the upper detection unit 36 ​​closest to the fixed plate 11. When the height of the stud 300 exceeds the second reference surface 35, the stud 300 interferes with the rotation of the upper detection unit 36. In other words, if the upper detection unit 36 ​​interferes with the stud 300 and blocks its rotation when the upper detection mechanism 30 rotates, it indicates that the bolt's installation height exceeds the first reference surface 24, i.e., it exceeds the maximum allowable height of the stud 300. The operator needs to lower the installation height of the stud 300 so that the highest point of the stud 300 is not higher than the second reference surface 35. Conversely, if the upper detection unit 36 ​​rotates smoothly for one revolution without contacting any stud 300, it indicates that the installation height of the studs 300 does not exceed the maximum allowable height.

[0092] An upper detection part 36 may be provided. If each stud 300 does not block the upper detection part 36 when the upper body 31 is rotated one revolution, it indicates that the installation height of the studs 300 does not exceed the upper limit of the tolerance range.

[0093] Multiple detection units 36 can be provided, such as two or three, depending on actual needs. The illustration shows an example with two detection units 36.

[0094] Further, as shown in Figure 15, the outer contour of the upper body 31 is roughly rectangular, and two upper detection parts 36 are respectively disposed at opposite ends of the upper body 31. The arrangement of the two upper detection parts 36 helps to ensure the balance of the upper detection parts 36, thereby ensuring the stability of the second reference surface 35 and improving the detection accuracy of the upper differential detection mechanism 30. In some embodiments, the upper detection parts 36 are movably disposed on the upper body 31 so that when the upper detection parts 36 abut against the stud 300, the upper detection parts 36 move relative to the upper body 31. This arrangement can prevent the upper differential detection mechanism 30 from seizing when the installation height of a stud 300 exceeds the maximum allowable height of the stud 300.

[0095] The upper detection part 36 can be a flexible component, such as a plastic sheet. Therefore, when it is blocked by the stud 300, the upper detection part 36 deforms, and when it moves from one side of the stud 300 to the other, it can automatically return to its original shape. Alternatively, the upper detection part 36 can be made of a rigid or inflexible material, in which case it can be rotatably mounted on the upper body 31. This embodiment uses a rigid upper detection part 36 as an example for explanation.

[0096] In some embodiments, the upper detection mechanism 30 includes a reset member 38, one end of which is connected to the upper body 31, and the other end of which is connected to the upper detection part 36. After the upper detection part 36 rotates relative to the upper body 31, the upper detection part 36 can be automatically reset by the reset member 38.

[0097] Furthermore, the reset member 38 is a spring, and a first hook 312 is provided on the side wall of the upper body 31. A second hook 361 is provided on the upper detection part 36. One end of the reset member 38 is connected to the first hook 312, and the other end of the reset member 38 is connected to the second hook 361. If the stud 300 interferes with the upper detection part 36, causing the upper detection part 36 to rotate relative to the upper body 31, the spring elastically extends; when the stud 300 no longer interferes with the upper detection part 36, it is equivalent to the upper detection part 36 moving from one side of the stud 300 to the other side of the stud 300, the spring elastically contracts, thereby automatically resetting the upper detection part 36, facilitating subsequent detection of the stud 300.

[0098] The specific steps for using the stud height gauge 100 of this application are as follows: First, the operator installs the fixing plate 11 of the stud height gauge 100 onto the hub 200 using the handle 121; then, the operator checks the detection plates 251 in the lower differential detection mechanism 20, ensuring they are all in their initial positions; then, the operator rotates the lower differential detection mechanism 20, causing the detection plates 251 to move from one side of the stud 300 to the other side, observing whether each detection plate 251 rotates, and recording the detection plates 251 that do not rotate; then, the operator rotates the upper differential detection mechanism 30, observing whether the stud 300 blocks the rotation of the upper detection part 36, and recording the stud 300 that blocks the rotation of the upper detection part 36; finally, the stud height gauge 100 is removed from the hub 200, thus completing the first detection of the installation height of the studs 300 installed on the hub 200.

[0099] The operator can manually re-inspect the studs 300 corresponding to the non-rotating detection piece 251, as well as the studs 300 that prevent the upper detection part 36 from rotating, and then make adaptive adjustments to the installation height of the studs 300; or directly make adaptive adjustments to the installation height of the studs 300. However, the above steps can be repeated to re-inspect the height of the studs 300 set on the hub 200.

[0100] The stud height gauge 100 of this application, through its structural design of the gauge body 10, upper differential detection mechanism 30, and lower differential detection mechanism 20, enables rapid and accurate detection of the installation height of the studs 300 mounted on the hub 200. Compared to the prior art's method of visually inspecting the stud height, this application improves detection efficiency and quality, allowing operators to more intuitively and accurately detect and judge whether the stud installation is qualified. Operators only need to rotate the lower differential detection mechanism 20 and the upper differential detection mechanism 30 respectively, checking whether the detection piece 251 in the lower differential detection mechanism 20 is in its initial position and whether the upper detection part 36 in the upper differential detection mechanism 30 is blocked by the stud 300, to quickly determine whether the installation height of the stud 300 is qualified.

[0101] In addition, it should be noted that there are different requirements for the installation height of the studs 300 set on different wheel hubs 200. In this case, it is only necessary to adapt the lower detection part 25 and / or the upper detection part 36 accordingly.

[0102] Furthermore, the lower detection part 25, corresponding to the first reference surface 24, can have a protruding bump to form a stepped structure, thereby increasing the minimum allowable height of the first reference surface 24; or the lower detection part 25, corresponding to the first reference surface 24, can be recessed towards the fixed plate 11 to decrease the minimum allowable height of the first reference surface 24. Similarly, the upper detection part 36, corresponding to the second reference surface 35, can have a protruding bump to decrease the maximum allowable height of the second reference surface 35; or the upper detection part 36, corresponding to the second reference surface 35, can be recessed away from the fixed plate 11 to increase the maximum allowable height of the second reference surface 35. The specific configuration can be determined according to actual needs, provided that after the lower detection part 25 is mounted on the lower body 21 and the upper detection part 36 is mounted on the upper body 31, the height difference between the first reference surface 24 and the second reference surface 35 meets the tolerance range of the stud 300 provided on the hub 200.

[0103] The above embodiments are merely illustrative examples of structures. The structures in each embodiment are not fixed combinations. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined and used.

[0104] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A stud height gauge for detecting the installation height of studs mounted on a wheel hub, characterized in that, include: The fixture body includes a fixed plate and a column. The fixed plate is used to fix the fixture to the hub. The stud is located on the outer periphery of the fixed plate. The column is vertically arranged on the fixed plate, and the height direction of the column is consistent with the height direction of the stud. A lower differential detection mechanism is rotatably arranged on the fixture body. The lower differential detection mechanism has a first reference surface, which corresponds to the minimum allowable height of the stud. An upper differential detection mechanism is rotatably arranged on the fixture body. The upper differential detection mechanism has a second reference surface, which corresponds to the maximum allowable height of the stud. The upper differential detection mechanism and the lower differential detection mechanism are arranged sequentially from top to bottom along the height direction of the column. The height difference between the first reference surface and the second reference surface meets the tolerance range of the stud.

2. The stud height gauge according to claim 1, characterized in that, The lower detection mechanism includes: a lower body rotatably mounted on the fixture body; and a lower detection part rotatably mounted on the lower body. The first reference surface is the surface of the lower detection part near the fixed plate. When the height of the stud is higher than the first reference surface, the lower detection part rotates relative to the column while following the lower body, and the stud blocks the rotation of the lower detection part, so that the lower detection part rotates relative to the lower body.

3. The stud height gauge according to claim 2, characterized in that, The lower detection unit includes a detection plate and a rotating shaft. The first reference surface is the surface of the detection plate near the fixed plate. The rotating shaft is connected to the detection plate and is rotatably disposed inside the lower body.

4. The stud height gauge according to claim 3, characterized in that, The lower differential detection mechanism includes a limiting member, the lower body is provided with a mounting hole, the rotating shaft is provided with a groove along its circumference, and the end of the limiting member passes through the mounting hole and is accommodated in the groove.

5. The stud height gauge according to claim 3, characterized in that, The detection plate has an arc-shaped hole, and the lower differential detection mechanism includes a positioning element. The positioning element passes through the arc-shaped hole and is installed on the lower body. The detection plate has an initial position. The end of the detection plate away from the positioning element is a tip. When the tip, the positioning element, and the column are in the same straight line, the detection plate is in the initial position.

6. The stud height gauge according to claim 2, characterized in that, The lower detection section is provided in multiple ways, and the multiple lower detection sections are arranged at intervals along the circumference of the lower body; a weight reduction groove is provided between each two adjacent lower detection sections, and the side wall of the lower body is recessed in the direction of the column to form the weight reduction groove.

7. The stud height gauge according to claim 1, characterized in that, The lower differential detection mechanism, the upper differential detection mechanism, and the fixed plate are arranged concentrically. The maximum radial length of the lower differential detection mechanism is greater than the maximum radial length of the fixed plate, and the maximum radial length of the upper differential detection mechanism is greater than the maximum radial length of the fixed plate.

8. The stud height gauge according to claim 1, characterized in that, The upper detection mechanism includes: an upper body, which is rotatably mounted on the column; an upper detection part, which is disposed at the end of the upper body away from the column, the second reference surface being the surface of the upper detection part near the fixed plate, and the stud abutting the upper detection part when the stud height exceeds the second reference surface.

9. The stud height gauge according to claim 8, characterized in that, The upper detection part is movably disposed on the upper body so that when the stud abuts against the upper detection part, the upper detection part moves relative to the upper body.

10. The stud height gauge according to claim 9, characterized in that, The upper detection mechanism includes a reset component. One end of the reset component is connected to the upper main body, and the other end of the reset component is connected to the upper detection part. After the upper detection part rotates relative to the upper main body, the upper detection part can be automatically reset by the reset component.

11. The stud height gauge according to claim 8, characterized in that, The upper detection unit is provided in two parts, and the two upper detection units are respectively located at opposite ends of the upper body.

12. The stud height gauge according to claim 1, characterized in that, The main body of the inspection tool includes at least one pair of grips for the operator's hands to hold. Each pair of grips includes two handles, which are located on opposite sides of the fixed plate, such that the two handles and the column are on the same straight line.

13. The stud height gauge according to claim 1, characterized in that, The lower differential detection mechanism includes a first bearing, and the upper differential detection mechanism includes a second bearing. Both the first bearing and the second bearing are mounted on the column. The fixture body includes a sleeve, which is disposed between the first bearing and the second bearing.

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