Detection tool for measuring center distance of holes in different surfaces
By designing a center distance measuring fixture for irregularly shaped holes, and utilizing a rotatable arm and a V-shaped support mechanism, the problems of high efficiency and accuracy in measuring irregularly shaped holes were solved, the operation process was simplified, costs were reduced, and measurement accuracy was improved.
Patent Information
- Application Number
- CN202520501982.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-21
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-21
AI Technical Summary
Existing technologies cannot efficiently and accurately measure the center distance of irregularly shaped surfaces, and the use of precision instruments such as coordinate measuring machines is costly and cumbersome, making it difficult to meet the needs of batch inspection.
A center distance measuring fixture for irregularly shaped holes was designed. It adopts a rotatable rotating arm and a V-shaped support mechanism, combined with a conical probe and an angle scale, to achieve rapid and accurate positioning and measurement of irregularly shaped holes.
It enables rapid, simple, and high-precision measurement of the center distance of irregular faces, reducing equipment costs and operational complexity, and improving measurement efficiency and accuracy.
Smart Images
Figure CN223841110U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a measuring tool, and more particularly to a measuring tool for measuring the center distance of irregular holes. Background Technology
[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.
[0003] There is a workpiece with irregular faces, such as Figure 1 As shown, there are two holes at opposite ends, each with a different radial angle. Existing center distance calipers cannot measure irregularly shaped holes. Even after modifying the probe angle of the measuring fixture, it is still impossible to guarantee that the measurement direction is on the axis of the workpiece being measured, and the measurement operation is inconvenient. Therefore, the conventional method for measuring the center distance of irregularly shaped holes is to use precision instruments such as coordinate measuring machines (CMMs) and articulated arms. These measuring devices are expensive and have high measurement accuracy, but the operation is cumbersome, the measurement efficiency is low, and it is not conducive to batch inspection. Specifically, CMMs require the design of positioning fixtures to position the workpiece, and the two centers are located manually to measure the center distance value of the workpiece. In batch measurement, automatic point finding and measurement need to be achieved through programming, which significantly increases labor costs.
[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Utility Model Content
[0005] The purpose of this invention is to provide a center distance measuring fixture for irregularly shaped holes. It can be equipped with a rotatable rotating arm through a second positioning mechanism, which facilitates the clamping of workpieces and rapid reading, and has high accuracy.
[0006] To achieve the above objectives, this utility model discloses a center distance measuring fixture for irregularly shaped holes, wherein the workpiece has a first end and a second end disposed opposite to each other, the first end of the workpiece has a first hole facing a first radial direction, and the second end of the workpiece has a second hole facing a second radial direction, and the center distance measuring fixture for irregularly shaped holes includes:
[0007] A base on which a track is mounted;
[0008] A support mechanism is mounted on the track and is used to support the body between the first end and the second end of the workpiece.
[0009] A first positioning mechanism, comprising a first positioning platform and a first probe, wherein the first positioning platform is mounted on the track and the first probe is mounted on the first positioning platform, and the first probe is used to place the first hole of the workpiece;
[0010] The second positioning mechanism includes a second positioning table, a rotating arm, and a second probe. The second positioning table is mounted on the base, the rotating arm is connected to the rotating shaft of the second positioning table, and the second probe is mounted on the rotating arm. The second probe is used to place the second hole of the workpiece.
[0011] A measuring mechanism is disposed at the first end of the track, and the measuring head of the measuring mechanism is used to abut against the first positioning platform.
[0012] As a further description of the above technical solution, the support mechanism includes multiple support pairs, and the support pairs are V-shaped on the side facing the body of the workpiece.
[0013] As a further description of the above technical solution, the number of the support pairs is two, and the two support pairs are respectively arranged at the first end and the second end of the workpiece.
[0014] As a further description of the above technical solution, the track includes a plurality of positioning holes spaced apart along the axial direction, the positioning holes being used to fix the support mechanism and the first positioning platform at a preset position.
[0015] As a further description of the above technical solution, the side of the first probe that contacts the first hole is set to be conical, and the side of the second probe that contacts the second hole is set to be conical.
[0016] As a further description of the above technical solution, an angle value scale is provided at the connection between the rotating arm and the second positioning platform, and the angle value scale matches the rotation angle of the rotating arm.
[0017] As a further description of the above technical solution, four rubber feet are provided at the four corners of the bottom of the base.
[0018] As a further description of the above technical solution, a spring is installed between the first probe and the first positioning stage, and a spring is installed between the second probe and the rotating arm.
[0019] Based on the above technical solution, the beneficial effects of this utility model are as follows:
[0020] The center distance measuring fixture for non-circular holes of this utility model can be equipped with a rotatable rotating arm through a second positioning mechanism. During measurement, the second hole can be positioned by rotating the rotating arm according to the angle difference between the first hole and the second hole in the two non-circular holes. Therefore, the workpiece can be clamped quickly, the steps are simple and easy to operate, and the axial positioning of the workpiece is achieved by a V-shaped support mechanism with high accuracy.
[0021] To further understand the features and technical content of this utility model, please refer to the following detailed description and drawings of this utility model. However, the drawings provided are for reference and illustration only and are not intended to limit this utility model. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments or prior art of this specification, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this specification. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a three-dimensional schematic diagram of a center distance measuring fixture for irregularly shaped holes provided in the embodiments of this specification;
[0024] Figure 2 This is a top view of a non-circular surface center distance measuring fixture provided in the embodiments of this specification;
[0025] In the picture:
[0026] 100. Workpiece; 101. First hole; 102. Second hole;
[0027] 1. Base; 11. Rail; 12. Rubber feet;
[0028] 2. Supporting mechanism; 21. Supporting component;
[0029] 3. First positioning mechanism; 31. First positioning stage; 32. First probe;
[0030] 4. Second positioning mechanism; 41. Second positioning stage; 42. Rotating arm; 43. Second probe;
[0031] 5. Measuring mechanism. Detailed Implementation
[0032] To enable those skilled in the art to better understand the technical solutions in this specification, the technical solutions in the embodiments of this specification will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this specification, and not all embodiments. Based on the embodiments in this specification, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this specification.
[0033] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can understand the advantages and effects of this utility model from the content disclosed in this specification. This utility model can be implemented or applied through other different specific embodiments, and various details in this specification can also be modified and changed based on different viewpoints and applications without departing from the concept of this utility model. Furthermore, the accompanying drawings of this utility model are for simple illustration only and are not depictions of actual dimensions, as stated in advance. The following embodiments will further describe the relevant technical content of this utility model in detail, but the disclosed content is not intended to limit the scope of protection of this utility model.
[0034] It should be understood that while terms such as "first," "second," and "third" may be used in this document to describe various components or signals, these components or signals should not be limited by these terms. These terms are primarily used to distinguish one component from another, or one signal from another. Furthermore, the term "or" as used herein should, as appropriate, include any combination of one or more of the related listed items.
[0035] Please see Figure 1-2 This embodiment provides a center distance measuring fixture for irregularly shaped holes, used to inspect a workpiece 100. The workpiece 100 has a first end and a second end disposed opposite to each other. The first end of the workpiece 100 has a first hole 101 facing a first radial direction, and the second end of the workpiece 100 has a second hole 102 facing a second radial direction. The center distance measuring fixture for irregularly shaped holes includes:
[0036] Base 1, with track 11 mounted on base 1;
[0037] Support mechanism 2 is mounted on track 11 and is used to support the body between the first end and the second end of workpiece 100.
[0038] The first positioning mechanism 3 includes a first positioning table 31 and a first probe 32. The first positioning table 31 is mounted on the track 11, and the first probe 32 is mounted on the first positioning table 31. The first probe 32 is used to place the first hole 101 of the workpiece 100.
[0039] The second positioning mechanism 4 includes a second positioning table 41, a rotating arm 42, and a second probe 43. The second positioning table 41 is mounted on the base 1, the rotating arm 42 is connected to the rotating shaft of the second positioning table 41, and the second probe 43 is mounted on the rotating arm 42. The second probe 43 is used to place the second hole 102 of the workpiece 100.
[0040] Measuring mechanism 5 is located at the first end of track 11, and the measuring head of measuring mechanism 5 is used to abut against the first positioning platform 31.
[0041] With the above structure, during use, the operator only needs to place the workpiece 100 body on the support mechanism 2 to provide basic support. Simultaneously, the second hole 102 of the workpiece 100 is aligned with the second probe 43 of the second positioning mechanism 4, achieving complete axial positioning. At this point, the workpiece is slightly rotated, and the angle of the rotating arm 42 is adjusted so that the first hole 101 of the workpiece 100 is aligned with the first probe 32 of the first positioning mechanism 3. This simultaneous grounding also positions the radial angle of the workpiece 100. Finally, the measuring mechanism 5 is activated, and the hole spacing of the workpiece 100 is obtained by measuring the distance between the first positioning platform 31 and the second positioning platform 41, achieving non-planar measurement.
[0042] During the above measurement process, the operator quickly positions the workpiece 100 along the axial direction using the support mechanism 2 and the second positioning mechanism 4. With the cooperation of the first positioning mechanism 3 and the second positioning mechanism 4, rapid radial positioning is achieved along with the rotation of the rotating arm 42. The positioning efficiency is high, the steps are simple and easy to implement, and the axial positioning is stable and accurate.
[0043] Furthermore, in this embodiment, the support mechanism 2 includes multiple support pairs 21, each of which is V-shaped on the side facing the workpiece 100. There are two support pairs 21, respectively positioned near the first and second ends of the workpiece 100. In other words, in this embodiment, especially for positioning conventional cylindrical workpieces, the V-shaped structure allows for rapid sliding and axial calibration, resulting in fast positioning. Placing one support pair 21 at each end achieves high-precision positioning.
[0044] Furthermore, the track 11 includes multiple positioning holes spaced apart along the axial direction. These positioning holes are used to fix the support mechanism 2 and the first positioning platform 31 at preset positions. Specifically, the positioning holes are internally threaded holes, which cooperate with external bolts to achieve stable fixation of the support mechanism 2 and the first positioning platform 31 through threaded connection, making disassembly and installation easy.
[0045] Furthermore, the side of the first probe 32 that contacts the first hole 101 is tapered, and the side of the second probe 43 that contacts the second hole 102 is also tapered. The tapered structure, in conjunction with the circular hole, enables rapid center finding, which helps to enhance positioning accuracy.
[0046] Furthermore, an angle scale is provided at the connection point between the rotating arm 42 and the second positioning stage 41, and the angle scale matches the rotation angle of the rotating arm 42. The operator can detect the 100° angle between the irregular facets of the workpiece by measuring the actual rotation angle of the rotating arm 42, thereby increasing the positioning accuracy.
[0047] Furthermore, four rubber feet 12 are provided at the four corners of the bottom of the base 1 to ensure the stability of the center distance measuring gauge of the irregular face during operation and to avoid shaking caused by bumps.
[0048] Furthermore, a spring is installed between the first probe 32 and the first positioning stage 31, and a spring is installed between the second probe 43 and the rotating arm 42. Specifically, the spring can provide a certain buffering effect between the workpiece 100 and the first positioning mechanism 3 or the second positioning mechanism 4, and achieve better center positioning with the cooperation of the conical head.
[0049] The above-disclosed content is only a preferred and feasible embodiment of the present utility model, and is not intended to limit the scope of the patent application of the present utility model. Therefore, all equivalent technical changes made using the contents of the present utility model specification and drawings are included in the scope of the patent application of the present utility model.
[0050] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.
[0051] Although this application has been described through embodiments, those skilled in the art will recognize that many modifications and variations are possible without departing from the spirit of this application, and it is intended that the appended embodiments include these modifications and variations without departing from this application.
Claims
1. A center distance measuring fixture for irregularly shaped holes, used for inspecting workpieces, wherein, The workpiece has a first end and a second end disposed opposite to each other. The first end of the workpiece has a first hole facing a first radial direction, and the second end of the workpiece has a second hole facing a second radial direction. The irregular hole center distance measuring fixture comprises: A base on which a track is mounted; A support mechanism is mounted on the track and is used to support the body between the first end and the second end of the workpiece. A first positioning mechanism, comprising a first positioning platform and a first probe, wherein the first positioning platform is mounted on the track and the first probe is mounted on the first positioning platform, and the first probe is used to place the first hole of the workpiece; The second positioning mechanism includes a second positioning table, a rotating arm, and a second probe. The second positioning table is mounted on the base, the rotating arm is connected to the rotating shaft of the second positioning table, and the second probe is mounted on the rotating arm. The second probe is used to place the second hole of the workpiece. A measuring mechanism is disposed at the first end of the track, and the measuring head of the measuring mechanism is used to abut against the first positioning platform.
2. The center distance measuring fixture for irregularly shaped holes according to claim 1, characterized in that: The support mechanism includes multiple support pairs, and the side of the support pairs facing the body of the workpiece is V-shaped.
3. The center distance measuring fixture for irregularly shaped holes according to claim 2, characterized in that: The number of support pairs is two, and the two support pairs are respectively located near the first end and the second end of the workpiece.
4. The center distance measuring fixture for irregularly shaped holes according to claim 1, characterized in that: The track includes a plurality of positioning holes spaced apart along the axial direction, which are used to fix the support mechanism and the first positioning platform at preset positions.
5. The center distance measuring fixture for irregularly shaped holes according to claim 1, characterized in that: The side of the first probe that contacts the first hole is tapered, and the side of the second probe that contacts the second hole is tapered.
6. The center distance measuring fixture for irregularly shaped holes according to claim 1, characterized in that: An angle scale is provided at the connection point between the rotating arm and the second positioning platform, and the angle scale is matched with the rotation angle of the rotating arm.
7. The center distance measuring fixture for irregularly shaped holes according to claim 1, characterized in that: Four rubber feet are provided at the four corners of the bottom of the base.
8. The center distance measuring fixture for irregularly shaped holes according to claim 5, characterized in that: A spring is installed between the first probe and the first positioning stage, and a spring is installed between the second probe and the rotating arm.