Flatness testing fixture

Abstract

The utility model relates to the technical field of flatness detection, in particular to a flatness detection tool, which comprises a detection tool body and at least three supporting parts, the first end of the supporting part is connected with the testing fixture body, and the second end is used for abutting against a to-be-tested surface. The second ends of the at least three supporting parts form a detection area; when the second end of the supporting part abuts against the surface to be detected, the detection tool body can detect the flatness of the area to be detected. Through the arrangement of the supporting part, a worker can hold the detection tool body by hand, the position of the silencing sheet does not need to be moved, and the flatness of the silencing sheet can be detected only by moving the detection tool body; in the process of measuring the flatness of the silencing sheet through the detection tool body, the at least three supporting parts can support the detection tool body, and can keep the detection tool body and the surface to be detected in a mutually perpendicular state, so that the stability of the detection tool body is improved, and the reliability of detection data is correspondingly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flatness detection, in particular to a flatness detection tool. Background Art

[0002] Flatness is a form tolerance, which refers to the deviation of the macroscopic concave and convex height of the substrate from the ideal plane. For silencer products, flatness within the range of 20*20mm is a key feature, which directly affects its bonding performance with the brake pad. It needs to be tested in real time at the production site and statistical process control (SPC) is performed.

[0003] Conventional contact probe measurement requires taking the workpiece to the laboratory for three-coordinate measurement, which is time-consuming, labor-intensive, inefficient, and directly affects the production cycle.

[0004] In order to improve the inspection efficiency, the staff can measure the workpiece by holding a low-force dial gauge, and the flatness of the workpiece can be inspected without moving the workpiece. However, it is difficult to ensure the stability of the low-force dial gauge when moving the low-force dial gauge to the workpiece to measure the flatness of the workpiece, which makes the measurement result prone to large deviations. Utility Model Content

[0005] In view of the above problems existing in the prior art, the utility model provides a flatness inspection tool.

[0006] In order to solve the above technical problems, the utility model is solved by the following technical solutions:

[0007] A flatness gauge comprises a gauge body and at least three supporting parts;

[0008] The first end of the support portion is connected to the gauge body, and the second end is used to abut against a surface to be measured;

[0009] The second ends of at least three of the support portions constitute a detection area;

[0010] When the second end of the supporting portion abuts against the surface to be measured, the measuring tool body can detect the flatness of the surface to be measured.

[0011] Preferably, the first end of the support portion is connected to the gauge body via a connecting portion; the first end of the support portion, the gauge body and the connecting portion are all detachably connected.

[0012] Preferably, a first through hole is provided at the connecting portion, and the gauge body can extend into and be fixed in the first through hole.

[0013] Preferably, the first through hole is provided with a first internal thread, and the gauge body is provided with a first external thread, and the gauge body is fixed in the first through hole by the cooperation of the first internal thread and the first external thread.

[0014] Preferably, a threaded hole communicating with the first through hole is provided at the connecting portion; when the gauge body is inserted into the first through hole, a bolt is inserted into the threaded hole and the first through hole to fix the gauge body in the first through hole.

[0015] Preferably, a support seat is provided at the end of the connecting portion close to the surface to be measured, and a second through hole is provided on the support seat at a position corresponding to the first through hole, and the second through hole is used for the insertion of the gauge body; the first end of the supporting portion is connected to the support seat.

[0016] Preferably, a mounting hole is provided on the support seat around the second through hole, and the first end of the support portion is detachably connected to the mounting hole.

[0017] Preferably, a second internal thread is provided at the mounting hole, and a second external thread is provided on the first end of the support portion; the first end of the support portion is fixed in the mounting hole by the cooperation of the second internal thread and the second external thread.

[0018] Preferably, a boss is provided at the first end of the support portion and along the circumferential direction of the support portion, and the boss is used to abut against the support seat.

[0019] Preferably, when the support portion and the support seat are in an installed state, the first end of the support portion extends through the installation hole to a side of the support seat away from the surface to be measured;

[0020] A nut is installed on the support portion at a side of the support base away from the surface to be measured, and the support portion is fixedly installed on the support base by clamping the support base with the nut and the boss.

[0021] The utility model has at least the following beneficial effects:

[0022] By setting the supporting parts in the present application, the staff can hold the gauge body, and there is no need to move the position of the silencer plate. The flatness of the silencer plate can be detected by moving the gauge body; and in the process of measuring the flatness of the silencer plate by the gauge body, at least three supporting parts can support the gauge body, and can keep the gauge body and the surface to be measured perpendicular to each other, thereby improving the stability of the gauge body and correspondingly improving the reliability of the detection data. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic diagram showing the flatness of a surface to be tested by a flatness tester in some embodiments of the present application is shown;

[0024] Figure 2 It shows a schematic diagram of the assembly of the inspection tool body, the connecting part, the supporting seat and the supporting part in some embodiments of the present application;

[0025] Figure 3 A first assembly schematic diagram of a connecting portion, a supporting seat and a supporting portion in some embodiments of the present application is shown;

[0026] Figure 4 A second assembly schematic diagram of the connecting portion, the supporting seat and the supporting portion in some embodiments of the present application is shown;

[0027] Figure 5 A schematic diagram of a boss and a nut clamping support seat in some embodiments of the present application is shown.

[0028] The parts indicated by the numbers in the accompanying drawings are as follows:

[0029] 100, low-force micrometer; 110, detection end; 200, support portion; 210, boss; 220, nut; 300, surface to be measured; 400, connection portion; 410, first through hole; 420, threaded hole; 421, bolt; 500, support seat; 510, second through hole; 520, mounting hole. DETAILED DESCRIPTION

[0030] In order to further understand the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments. It should be understood that the embodiments are only used to explain the utility model but not to limit it.

[0031] like Figure 1-4 As shown, this embodiment provides a flatness gauge, which includes a gauge body and a support portion 200, wherein the number of the support portions 200 is at least three, wherein the first end of the support portion 200 is connected to the gauge body, and the second end of the support portion 200 is used to abut against the surface 300 to be measured, and further, the second ends of at least three support portions 200 can constitute a detection area, and when the second end of the support portion 200 is placed on the surface 300 to be measured, the gauge body can detect the flatness within the detection area.

[0032] Specifically, the gauge body in this embodiment adopts a low-force micrometer 100. Taking the detection of the flatness of the silencer as an example, for the silencer, the flatness within the range of 20*20mm is a key characteristic, so it is necessary to measure the flatness data of the silencer within any range of 20*20mm; and the gauge body adopted in this embodiment is a low-force micrometer 100, through the coordinated use of the low-force micrometer 100 and the support part 200, the low-force micrometer 100 can detect the flatness within the detection area formed by the support part 200. In this embodiment, the detection area formed by the second end of the support part 200 is set to 20*20mm, so by moving the low-force micrometer 100, it is possible to measure the flatness data within any range of 20*20mm.

[0033] It is worth mentioning that, through the provision of the support part 200 in this embodiment, the staff can hold the gauge body by hand, and the flatness of the silencer plate can be detected by moving the gauge body only, without moving the position of the silencer plate; and in the process of measuring the flatness of the silencer plate through the gauge body, at least three support parts 200 can support the gauge body, and can keep the gauge body and the surface to be measured 300 in a state of being perpendicular to each other, thereby improving the stability of the gauge body and correspondingly improving the reliability of the detection data.

[0034] In some embodiments, a connecting portion 400 is further included, and the connecting portion 400 is connected to the first end of the support portion 200 and the gauge body, respectively, to achieve the connection and coordination between the support portion 200 and the gauge body. Furthermore, the connecting portion 400 and the first end of the support portion 200 and the connecting portion 400 and the gauge body are all detachably connected, so that in different working scenarios, when there is a need to use the handheld gauge body, the connecting portion 400 and the support portion 200 are installed on the gauge body, and when there is no need to use the handheld gauge body, the connecting portion 400 and the support portion 200 are removed from the gauge body for easy use.

[0035] In some embodiments, a first through hole 410 is provided at the connecting portion 400; since the gauge body in this embodiment adopts a low-force dial gauge 100, and the low-force dial gauge 100 has a detection end 110 extending in a long strip shape, the low-force dial gauge 100 abuts against the surface 300 to be measured through the detection end 110, thereby realizing the detection of the flatness of the surface 300 to be measured; when in use, the detection end 110 of the low-force dial gauge 100 is extended into the first through hole 410, so that the detection end 110 passes through the first through hole 410, and the detection end 110 is basically flush with the second end of the supporting portion 200, and then the detection end 110 is fixed in the first through hole 410, thereby realizing installation.

[0036] It can be understood that during the installation process, the detection end 110 is arranged to be basically flush with the second end of the support part 200 after passing through the first through hole 410, so that after the staff holds the inspection tool body and places the inspection tool on the surface to be measured 300, while the second end of the support part 200 abuts against the surface to be measured 300, the detection end 110 can also abut against the surface to be measured 300, which on the one hand ensures that the support part 200 can effectively play a stabilizing role, and on the other hand can also ensure that the detection end 110 can detect the flatness of the surface to be measured 300.

[0037] In this embodiment, the detection end 110 is passed through the first through hole 410 so that the inner wall of the first through hole 410 can limit the detection end 110 to a certain extent; further, the detection end 110 is fixed in the first through hole 410 to prevent the detection end 110 from shaking during the detection process and affecting the detection result.

[0038] In some embodiments, a first internal thread is provided in the first through hole 410, and a first external thread matching the first internal thread is provided on the detection end 110; when the detection end 110 passes through the first through hole 410, the detection end 110 can be fixed in the first through hole 410 by the thread matching of the first internal thread and the first external thread, thereby achieving a fixed connection between the gauge body and the connecting portion 400. Moreover, by the threaded fixed connection of the detection end 110 in the first through hole 410, the gauge body and the connecting portion 400 can be preferably detachable, which is convenient for use.

[0039] It is worth mentioning that, through the threaded connection of the detection end 110 in the first through hole 410, the detection end 110 can be rotated to adjust the distance that the second end of the detection end 110 extends out of the first through hole 410, so that the detection end 110 can not only detect the flatness of the surface 300 to be measured that is in the same plane as the second ends of the multiple support parts 200, but also detect the flatness of the surface 300 to be measured that is in a different plane from the second ends of the multiple support parts 200, which is easy to use.

[0040] In some embodiments, a threaded hole 420 is provided on the connecting portion 400 , and the threaded hole 420 is connected to the first through hole 410 ; a bolt 421 is used in conjunction with the threaded hole 420 .

[0041] When the detection end 110 of the gauge body extends into the first through hole 410 and passes through the first through hole 410 to be flush with the second end of the support portion 200, the bolt 421 is screwed into the threaded hole 420 so that the end of the bolt 421 can extend into the first through hole 410 through the threaded hole 420 and abut against the detection end 110, thereby achieving a fixed connection between the gauge body and the connecting portion 400 and maintaining the stability of the gauge body when detecting the flatness of the surface 300 to be measured; when disassembly is required, the bolt 421 is rotated in the opposite direction so that the corresponding end of the bolt 421 is separated from the detection end 110.

[0042] In some embodiments, a support base 500 is provided at the end of the connecting portion 400 close to the surface to be tested 300, and a second through hole 510 is provided on the support base 500. The position of the second through hole 510 corresponds to the position of the first through hole 410, and the second through hole 510 is also used for the detection end 110 to extend into.

[0043] During installation, the detection end 110 is extended into the first through hole 410 and the second through hole 510 and passes through the first through hole 410 and the second through hole 510, so that the detection end 110 extends to a position flush with the second end of the support part 200, and then the gauge body and the connecting part 400 are fixed to complete the installation between the gauge body and the connecting part 400.

[0044] It can be understood that when the detection end 110 extends into the second through hole 510, the side wall of the second through hole 510 can also block the detection end 110, so as to play a certain limiting role on the detection end 110 and avoid the shaking of the detection end 110, thereby improving the stability of the inspection fixture body during the flatness detection process.

[0045] In some embodiments, mounting holes 520 are further provided on the support seat 500, and the number of the mounting holes 520 corresponds to the number of the supporting parts 200. Since there are three supporting parts 200 in this embodiment, the number of corresponding mounting holes 520 is also three; the three mounting holes 520 are distributed around the second through hole 510; further, the first end of the supporting part 200 can be detachably installed in the mounting hole 520.

[0046] It can be understood that the mounting holes 520 are arranged around the second through holes 510 so that the detection end 110 after installation can be within the 20*20mm detection area formed by the second ends of the three support parts 200, thereby enabling the detection end 110 to better detect the flatness within the range of 20*20mm.

[0047] The first end of the support part 200 is detachably connected to the mounting hole 520 , so that the support part 200 can be disassembled and assembled to facilitate use.

[0048] In some embodiments, a second internal thread is provided in the mounting hole 520, and a second external thread matching the second internal thread is provided on the first end of the support part 200; the connection between the support part 200 and the support seat 500 is achieved through the threaded matching between the second internal thread and the second external thread.

[0049] It is worth mentioning that the cooperation between the second internal thread and the second external thread can not only realize the fixed connection between the support part 200 and the support seat 500, but also play an adjustment role. Specifically, the support part 200 can be rotated to change the distance that the first end of the support part 200 extends into the mounting hole 520; through the adjustment effect played by the cooperation of the second internal thread and the second external thread, the three support parts 200 can adapt to different surfaces 300 to be measured, so as to ensure the stability of the placement of the inspection fixture body on the surface 300 to be measured.

[0050] In some embodiments, a boss 210 is disposed on the first end of the support portion 200 and extends along the circumferential direction of the support portion 200 . The boss 210 can abut against the support seat 500 when installed.

[0051] Specifically, after the first end of the support part 200 is extended into the mounting hole 520, the boss 210 can abut against the side wall of the support seat 500 toward the second end of the support part 200. After the boss 210 abuts against the support seat 500, the support part 200 can be limited in the axial direction, and at the same time, the support part 200 can be prevented from being skewed relative to the support seat 500, and the stability of the connection between the support part 200 and the support seat 500 can be maintained, further improving the stability of the inspection fixture body relative to the surface 300 to be measured.

[0052] Combination Figure 5 As shown, in some embodiments, when installing the support part 200 and the support seat 500, after the first end of the support part 200 is extended into the installation hole 520, and after the boss 210 abuts the support seat 500, the first end of the support part 200 can pass through the installation hole 520 and extend to the side of the support seat 500 away from the surface 300 to be measured; at this time, a nut 220 is sleeved on the first end of the support part 200 and tightened, so that the nut 220 abuts against the side wall of the support seat 500 away from the surface 300 to be measured, and then, the nut 220 and the boss 210 will form a clamping effect on the support seat 500, thereby realizing a fixed connection between the support seat 500 and the support part 200, thereby avoiding shaking between the support part 200 and the support seat 500, improving the stability of the connection between the support seat 500 and the support part 200, and then improving the stability of the inspection tool body when measuring the flatness of the surface 300 to be measured.

[0053] In short, the above is only a preferred embodiment of the present utility model, and all equivalent changes and modifications made according to the scope of the patent application of the present utility model should fall within the scope of the present utility model patent.

Claims

1. A flatness inspection tool, characterized in that: It includes a gauge body and at least three supporting parts; The first end of the support portion is connected to the gauge body, and the second end is used to abut against a surface to be measured; The second ends of at least three of the support portions constitute a detection area; When the second end of the supporting portion abuts against the surface to be measured, the measuring tool body can detect the flatness of the surface to be measured.

2. The flatness gauge according to claim 1, characterized in that: The first end of the support portion is connected to the gauge body through a connecting portion; the first end of the support portion, the gauge body and the connecting portion are all detachably connected.

3. The flatness gauge according to claim 2, characterized in that: The connecting portion is provided with a first through hole, and the gauge body can extend into and be fixed in the first through hole.

4. The flatness gauge according to claim 3, characterized in that: The first through hole is provided with a first internal thread, and the gauge body is provided with a first external thread. The gauge body is fixed in the first through hole through the cooperation of the first internal thread and the first external thread.

5. The flatness gauge according to claim 3 or 4, characterized in that: The connecting portion is provided with a threaded hole connected to the first through hole; when the gauge body is inserted into the first through hole, a bolt is inserted into the threaded hole and the first through hole to fix the gauge body in the first through hole.

6. The flatness gauge according to claim 3, characterized in that: A support seat is arranged at the end of the connecting portion close to the surface to be measured, a second through hole is arranged on the support seat at a position corresponding to the first through hole, and the second through hole is used for the gauge body to extend therein; the first end of the supporting portion is connected to the support seat.

7. The flatness gauge according to claim 6, characterized in that: The support seat is provided with a mounting hole around the second through hole, and the first end of the support portion is detachably connected to the mounting hole.

8. The flatness gauge according to claim 7, characterized in that: The mounting hole is provided with a second internal thread, and the first end of the support portion is provided with a second external thread; the first end of the support portion is fixed in the mounting hole through the cooperation of the second internal thread and the second external thread.

9. The flatness gauge according to claim 8, characterized in that: A boss is provided at the first end of the support portion and along the circumferential direction of the support portion, and the boss is used to abut against the support seat.

10. The flatness gauge according to claim 9, characterized in that: When the support portion and the support seat are in an installed state, the first end of the support portion extends through the installation hole to a side of the support seat away from the surface to be measured; A nut is installed on the support portion at a side of the support base away from the surface to be measured, and the support portion is fixedly installed on the support base by clamping the support base with the nut and the boss.

Images