Disc gear shaft hole outer diameter measuring instrument

Abstract

The utility model relates to a measuring device, in particular to a disc gear shaft hole outer diameter measuring instrument. Comprising a measuring instrument body, a disc detection surface is arranged at the front end of the measuring instrument body, a detection meter and a plurality of adjusting knobs are arranged at the rear end of the measuring instrument body, a cross-shaped sliding groove is formed in the disc detection surface, and three measuring fulcrums are arranged in the cross-shaped sliding groove. The detection seat is located in the center of the cross-shaped sliding groove, the three measurement supporting points comprise a movable measurement supporting point and a fixed measurement supporting point which are arranged on the two sides of the detection seat and a fixed measurement supporting point arranged below the detection seat, and the detection device further comprises a detection cushion block which is detachably connected with the detection seat. The disc gear shaft hole outer diameter measuring instrument can quickly detect the shaft hole outer diameter of a disc gear part, and is convenient to operate.

Description

Technical Field

[0001] The utility model relates to a measuring device in the field of machining, and particularly to an outer diameter measuring instrument for the shaft hole of a disk tooth Background Technique

[0002] As Figure 4 shown in a disk tooth part, its structure includes a disk tooth main body and a shaft hole in the center, and its shaft hole has a certain height. Before the disk tooth part leaves the factory, it is necessary to detect not only the tooth system parameters and the inner diameter of the shaft hole, but also the tolerance of the outer diameter of its shaft hole, that is, the outer diameter tolerance at the position A of the shaft hole port and the position B of the root of the shaft hole, so as to ensure the stability of the disk tooth part during assembly and use

[0003] The existing three-point sliding jaw type measuring instruments are all used to measure the inner diameter of parts. For example, the publication number: CN118129573A discloses a bearing inner diameter measuring device with a quickly adjustable fulcrum, and the publication number: CN204757911U discloses an inner diameter coaxiality detection device, and their structures are all like this. And due to the reasons of the structure of the disk tooth part itself, it is also impossible to use a conventional caliper for measurement, and the detection efficiency is also low Summary of the Invention

[0004] The utility model aims to provide an outer diameter measuring instrument for the shaft hole of a disk tooth that can quickly detect

[0005] An outer diameter measuring instrument for the shaft hole of a disk tooth in this scheme includes a measuring instrument body. A disk detection surface is provided at the front end of the measuring instrument body. A detection table and a plurality of adjusting knobs are provided at the rear end of the measuring instrument body. A cross-shaped sliding groove is provided on the disk detection surface. Three measuring fulcrums are provided in the cross-shaped sliding groove. Its characteristics are: A detection seat is fixedly provided at the center of the disk detection surface. The detection seat is located at the center of the cross-shaped sliding groove. The three measuring fulcrums include a movable measuring fulcrum and a fixed measuring fulcrum provided on both sides of the detection seat, and a fixed measuring fulcrum provided below the detection seat. It also includes a detection cushion block, and the detection cushion block is detachably connected to the detection seat

[0006] Further, both the movable measuring fulcrum and the fixed measuring fulcrum include a support rod and a measuring cap on the support rod

[0007] Further, the detection seat is circular, and the circumferential edge thereof abuts against the support rods of the movable measuring fulcrum and the fixed measuring fulcrum; the detection cushion block is also circular, and its diameter is the same as the diameter of the detection seat. The detection cushion block covers the detection seat, and its circumferential edge abuts against the support rods of the movable measuring fulcrum and the fixed measuring fulcrum

[0008] Further, a clamping groove is formed on the upper surface at the center of the detection base, and a protrusion adapted to the clamping groove is provided on the lower surface of the detection cushion block.

[0009] Further, a magnet sheet is embedded in the clamping groove.

[0010] The advantages of the utility model are as follows: the protruding shaft hole part at the center of the disk tooth part is placed on the detection base, the edge of the workpiece contour touches the measurement fulcrum, and the outer diameter dimension of the root of its shaft hole can be measured. After the detection cushion block is installed on the detection base, the outer diameter of the shaft hole port position can be detected. By transforming the original inner diameter detection equipment, the outer diameter measurement can be realized, and the detection operation is convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a schematic structural diagram of an outer diameter measuring instrument for a disk tooth shaft hole of the utility model;

[0012] Figure 2 is Figure 1 a partial structural diagram in the C direction in, and the outer diameter dimension of the root of the shaft hole is measured in the figure;

[0013] Figure 3 is Figure 1 a partial structural diagram in the C direction in, and the outer diameter dimension of the port of the shaft hole is measured in the figure;

[0014] Figure 4 is a schematic structural diagram of a disk tooth part.

[0015] In the figure, 1 is the measuring instrument body, 2 is the disk detection surface, 3 is the detection gauge, 4 is the cross-shaped sliding groove, 5 is the detection base, 6 is the moving measurement fulcrum, 7 is the fixed measurement fulcrum, 8 is the support rod, 9 is the measurement cap, 10 is the detection cushion block, and 11 is the magnet sheet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0017] According to Figures 1 to 3 shown, an outer diameter measuring instrument for a disk tooth shaft hole includes a measuring instrument body 1. A disk detection surface 2 is provided at the front end of the measuring instrument body 1, and a detection gauge 3 and a plurality of adjustment knobs are provided at the rear end of the measuring instrument body 1. In this embodiment, the detection gauge 3 is a dial indicator. A cross-shaped sliding groove 4 is provided on the disk detection surface 2, and a detection base 5 is fixedly provided at the center of the disk detection surface 2. The detection base 5 is circular, and its center is located at the center of the cross-shaped sliding groove 4.

[0018] The cross-shaped sliding groove 4 is provided with three measuring fulcrums. The three measuring fulcrums include a movable measuring fulcrum 6 and a fixed measuring fulcrum 7 arranged in the sliding grooves on both sides of the detection seat 5, and the remaining one is a fixed measuring fulcrum 7 arranged in the sliding groove below the detection seat 5. Both the movable measuring fulcrum 6 and the fixed measuring fulcrum 7 include a rod 8 arranged in the sliding groove and a measuring cap 9 threadedly connected to the top of the rod 8. The measuring cap 9 is used to contact the detection profile surface of the part to be detected. The circumferential edge of the detection seat 5 abuts against the rods 8 of the movable measuring fulcrum 6 and the fixed measuring fulcrum 7.

[0019] The detection cushion block 10 is circular, and its diameter is the same as the diameter dimension of the detection seat 5. It covers the detection seat 5, and its circumferential edge abuts against the rods 8 of the movable measuring fulcrum 6 and the fixed measuring fulcrum 7. The detection cushion block 10 is detachably connected to the detection seat 5. In this embodiment, a circular card slot is opened on the upper surface of the center of the detection seat 5, and a protrusion adapted to the card slot is provided on the lower surface of the detection cushion block 10.

[0020] As a further improvement of this embodiment, a magnet sheet 11 is embedded in the card slot for better connection with the detection cushion block 10.

[0021] When this detector is in use, first place the standard part on the detection seat 5, adjust the micrometer to the 0 scale, and then place the disk gear workpiece to be detected on the detection seat 5. For details, see Figure 2 , at this time, the outer diameter of the root of the workpiece shaft hole is measured, and the offset of the scale of the micrometer is the dimensional tolerance one compared with the standard. Remove the workpiece, install the detection cushion block 10 on the detection seat 5, the overall detection position is raised, and then place the workpiece on the detection cushion block 10. For details, see Figure 3 , at this time, the outer diameter of the port of the workpiece shaft hole is measured, and the offset of the scale of the micrometer is the dimensional tolerance two compared with the standard. Comparing the offsets of tolerance one and tolerance two can judge the tolerance amount of the outer contour of the shaft hole.

[0022] The above are only the embodiments of the present invention. Common knowledge such as specific structures and characteristics known in the solution is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicability of the patent.

Claims

1. A disc gear shaft hole outer diameter measuring instrument, comprising a measuring instrument body (1), a disc detection surface (2) is provided at the front end of the measuring instrument body (1), a detection gauge (3) and a plurality of adjustment knobs are provided at the rear end of the measuring instrument body (1), a cross-shaped slide groove (4) is provided on the disc detection surface (2), and three measuring fulcrums are provided in the cross-shaped slide groove (4), characterized in that: A detection seat (5) is fixedly provided at the center of the circular disc detection surface (2), and the detection seat (5) is located at the center of the cross-shaped slide groove (4). The three measurement fulcrums include a movable measurement fulcrum (6) and a fixed measurement fulcrum (7) provided on both sides of the detection seat (5), and a fixed measurement fulcrum (7) provided below the detection seat (5). The detection pad (10) is also provided, and the detection pad (10) is detachably connected to the detection seat (5).

2. The disc gear shaft hole outer diameter measuring instrument according to claim 1, characterized in that: The movable measurement fulcrum (6) and the fixed measurement fulcrum (7) both comprise a support rod (8) and a measurement cap (9) on the support rod (8).

3. A disc gear shaft hole outer diameter measuring instrument according to claim 1 or 2, characterized in that: The detection seat (5) is circular, and its circumferential edge abuts against the support rods (8) of the movable measurement fulcrum (6) and the fixed measurement fulcrum (7); the detection pad (10) is also circular, and its diameter is the same as the diameter of the detection seat (5); the detection pad (10) covers the detection seat (5), and its circumferential edge abuts against the support rods (8) of the movable measurement fulcrum (6) and the fixed measurement fulcrum (7).

4. The disc gear shaft hole outer diameter measuring instrument according to claim 3, characterized in that: A slot is provided on the central upper surface of the detection seat (5), and a protrusion adapted to the slot is provided on the lower surface of the detection pad (10).

5. The disc gear shaft hole outer diameter measuring instrument according to claim 4, characterized in that: A magnet sheet (11) is embedded in the slot.

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