Detection tool for spline groove of shaft sleeve

Abstract

The utility model discloses a shaft sleeve spline groove detection gauge, comprising a base block, a first circular hole and a second circular hole whose cross section is smaller than that of the first circular hole are arranged on the top surface of the base block, a square block arranged at the center of the bottom of the second circular hole is fixed on the base block, a circular block is inserted in the first circular hole, and the height of the circular block is greater than the depth of the first circular hole. An angle scale is arranged on the base block, a pointer block matched with the angle scale is installed on the round block, and a spline groove is formed in the center of the round block. The device can rapidly detect the precision of the shaft sleeve spline groove, is high in efficiency, and is worthy of popularization and application.

Description

Technical Field

[0001] This utility model relates to the field of inspection tools, especially bushing inspection tools, and more particularly to a bushing spline groove inspection tool. Background Technology

[0002] In the field of mechanical transmission, the machining accuracy of the bushing spline groove directly affects the fit performance and service life of the transmission system. Traditional inspection methods involve manually inspecting each groove using angle gauges and vernier calipers. These traditional methods suffer from the following technical drawbacks: complex inspection, low accuracy, and low efficiency. Therefore, there is an urgent need in the market for a bushing spline groove inspection tool that offers high inspection efficiency, high accuracy, and ease of operation.

[0003] Chinese utility model patent CN 217384029 U discloses a spline shaft runout inspection tool. This tool includes an inspection bracket and a detection component. The detection component is mounted on the upper end of the inspection bracket. A first drive shaft is mounted on one side of the inspection bracket, and a second drive shaft is located on the other side. One side of the second drive shaft is connected to the inspection bracket via an electric push rod, and a spline bushing passes through the middle of the first and second drive shafts. The inspection bracket includes a lifting link extending through its upper end and a fixed top plate mounted on the top of the lifting link. Limiting sliders are installed at the upper and lower ends of the fixed top plate, and the detection component is connected to the fixed top plate. This inspection tool has low detection efficiency and is complex, making it unsuitable for widespread application. Utility Model Content

[0004] This invention aims to overcome the shortcomings of the prior art by providing a bushing spline groove inspection fixture that can accurately and efficiently inspect the spline groove precision on the bushing, thus meeting the requirements for accurate, efficient, and low-cost inspection of the spline groove on the bushing.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: This bushing spline groove inspection fixture includes a base block, a first circular hole and a second circular hole with a cross-section smaller than the first circular hole on the top surface of the base block, a square block fixed on the base block at the bottom center of the second circular hole, a circular block inserted into the first circular hole, the height of the circular block being greater than the depth of the first circular hole, an angle scale on the base block, and a pointer block matching the angle scale installed on the circular block, with a spline groove in the center of the circular block. The function of the first and second circular holes is to allow the circular block to be placed, and the spline groove in the circular holes allows the bushing workpiece to be inserted into the spline groove, with the bottom of the bushing workpiece fitting into the square block post, facilitating the pushing of the pointer block to check accuracy. The function of the angle scale and the pointer block is to push the pointer block and determine the manufacturing accuracy and pass rate of the bushing spline groove by using the angle scale. The function of the spline groove is that the spline groove on the circular block is of accurate precision, used to detect the accuracy of the spline groove on the bushing workpiece.

[0006] Further improvements include a longitudinal venting notch on the outline of the first circular hole. The purpose of this longitudinal venting notch is to allow air to escape when the circular block is tightly fitted into the first circular hole. The outer contour of the circular block is attached to the outline of the first circular hole, and the air is released through the longitudinal venting notch. This facilitates a tight fit of the circular hole into the first circular hole and also prevents the circular hole from rotating due to excessive air tightness.

[0007] Further improvements include a longitudinal groove on the outer contour of the circular block, and a circular hole on the pointer block that inserts into the circular block. A longitudinal locking block, which mates with the longitudinal groove, is fixed at the contour of the circular hole. The purpose of the longitudinal groove, the circular hole, and the longitudinal locking block is to facilitate the assembly of the circular block and the pointer block after machining, reducing production costs. This significantly reduces the inspection cost of the bushing spline groove, making it suitable for large-scale application. When the pointer block is rotated, the longitudinal groove and the longitudinal locking block work together to drive the circular hole to rotate, thus facilitating the precision inspection of the bushing spline groove.

[0008] Further improvements were made, and the base block includes an upper block, a middle block, and a lower block. Guide posts are inserted between the upper, middle, and lower blocks, and the upper and lower blocks are fastened to the middle block with fasteners. The function of the upper, middle, and lower blocks and the guide posts is to reduce the processing difficulty and cost by assembling the base block, thereby not only facilitating processing and reducing processing costs, but also enabling mass production, greatly reducing the accuracy and cost of inspecting the bushing spline groove; the guide posts allow the upper, middle, and lower blocks to be assembled accurately and quickly.

[0009] Further improvements include the addition of a movable arc-shaped groove on the base block. The purpose of this groove is to address the issue that, due to the thinness of the pointer block, fingers may slip when moving it to inspect the spline groove of the bushing. This hinders the rapid and accurate inspection of the bushing. The movable arc-shaped groove allows the finger to be inserted deep into the groove, enabling the finger to fully move the pointer block, thus achieving both fast and accurate inspection of the bushing.

[0010] The beneficial effects of this utility model are:

[0011] 1) The circular block can be placed through the first and second circular holes, and the circular holes have spline grooves, so the sleeve workpiece can be inserted into the spline grooves and the bottom of the sleeve workpiece fits into the square block post, which can facilitate the push detection of the pointer block;

[0012] 2) The longitudinal venting notch facilitates the installation of the round block, preventing difficulties in venting gas during installation and ensuring the block is properly installed into the first round hole;

[0013] 3) By moving the circular groove, the finger can be used to push the pointer block, thereby observing the offset tolerance of the pointer block on the angle scale. This allows for precise and efficient detection of the spline groove angle accuracy. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present utility model;

[0015] Figure 2 This is an exploded view of the present invention;

[0016] Figure 3 The working principle of this utility model Figure 1 ;

[0017] Figure 4 The working principle of this utility model Figure 2 ;

[0018] Figure 5 This is a 3D view of the bushing workpiece.

[0019] Explanation of reference numerals in the attached drawings: base block 1, upper block 1a, middle block 1b, lower block 1c, first round hole 1-1, longitudinal venting notch 1-1a, second round hole 1-2, angle scale 1-3, moving arc groove 1-4, square block 2, round block 3, spline groove 3-1, longitudinal slot 3-2, pointer block 4, round hole 4-1, longitudinal slot 4-1a, guide post 5, bushing workpiece 6, spline groove with detection 6-1, positioning square groove 6-2. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Referring to the attached diagram: This bushing spline groove inspection fixture includes a base block 1. The top surface of the base block 1 has a first circular hole 1-1 and a second circular hole 1-2 with a cross-section smaller than the first circular hole 1-1. A square block 2 is fixed on the base block 1 and located at the bottom center of the second circular hole 1-2. A circular block 3 is inserted into the first circular hole 1-1. The height of the circular block 3 is greater than the depth of the first circular hole 1-1. An angle scale 1-3 is provided on the base block 1. A pointer block 4 matching the angle scale 1-3 is installed on the circular block 3. A spline groove 3-1 is opened in the center of the circular block 3.

[0022] A longitudinal venting notch 1-1a is provided at the outline of the first circular hole 1-1.

[0023] The outer contour of the circular block 3 has a longitudinal slot 3-2, and the pointer block 4 has a circular hole 4-1 that is inserted into the circular block 3. A longitudinal block 4-1a that is fixed at the contour of the circular hole 4-1 and is inserted into the longitudinal slot 3-2.

[0024] The base block 1 includes an upper block 1a, a middle block 1b, and a lower block 1c. Guide posts 5 are inserted between the upper block 1a, the middle block 1b, and the lower block 1c. The upper block 1a and the lower block 1c are fastened to the middle block 1b by fasteners.

[0025] The base block 1 has a movable circular groove 1-4.

[0026] The working principle of this utility model is as follows: When it is necessary to perform a qualified accuracy test on the spline groove 6-1 with detection on the bushing workpiece 6, it is only necessary to install the bushing workpiece 6 and make the positioning square groove 6-2 tightly inserted into the square block 2 to prevent the bushing workpiece 6 from rotating. At the same time, the spline groove 6-1 with detection on the bushing workpiece 6 will be inserted into the spline groove 3-1. After the bushing workpiece 6 is installed, the pointer block 4 is moved by moving the position of the arc groove 1-4, so as to observe the offset tolerance of the pointer block 4 on the angle scale 1-3. Thus, the angular accuracy of the spline groove on the bushing can be accurately and efficiently detected. It is not only efficient but also has high detection accuracy. After the detection is completed, the bushing workpiece 6 is taken out and another bushing workpiece 6 is placed down for detection. Unlike the traditional detection method, it is not necessary to reposition and detect the next bushing workpiece 6. This method has very high detection accuracy and efficiency, and the detection cost is also low, which is conducive to widespread application.

[0027] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art should understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A detection tool for detecting spline groove of a bushing, comprising a base block (1), characterized in that: The base block (1) has a first circular hole (1-1) and a second circular hole (1-2) with a cross-section smaller than the first circular hole (1-1) on its top surface. A square block (2) is fixed on the base block (1) and located at the bottom center of the second circular hole (1-2). A circular block (3) is inserted into the first circular hole (1-1). The height of the circular block (3) is greater than the depth of the first circular hole (1-1). An angle scale (1-3) is provided on the base block (1). A pointer block (4) matching the angle scale (1-3) is installed on the circular block (3). A spline groove (3-1) is opened in the center of the circular block (3).

2. The detection fixture for spline groove of shaft sleeve according to claim 1, characterized in that: The first circular hole (1-1) has a longitudinal venting notch (1-1a) at its outline.

3. The sleeve spline inspection fixture of claim 1, wherein: The outer contour of the circular block (3) has a longitudinal slot (3-2), and the pointer block (4) has a circular hole (4-1) that is inserted into the circular block (3). A longitudinal block (4-1a) that is inserted into the longitudinal slot (3-2) is fixed at the contour of the circular hole (4-1).

4. The sleeve spline inspection fixture of claim 1, wherein: The base block (1) includes an upper block (1a), a middle block (1b) and a lower block (1c). A guide post (5) is inserted between the upper block (1a), the middle block (1b) and the lower block (1c). The upper block (1a) and the lower block (1c) are fastened to the middle block (1b) by fasteners.

5. The sleeve spline inspection fixture of claim 1, wherein: The base block (1) has a movable arc groove (1-4).

Images