CN-224230873-U - Inner hole chamfer coordinate measuring device

Abstract

The utility model belongs to the technical field of chamfer measuring devices, and discloses an inner hole chamfer coordinate measuring device which comprises a measuring hole sleeve, a dial indicator detachably and fixedly arranged at the top of the measuring hole sleeve, a measuring shaft movably arranged in a hollow cavity of the measuring hole sleeve and capable of moving up and down along the axis of the measuring hole sleeve, wherein the top surface of the measuring shaft is contacted with the measuring shaft of the dial indicator, the working end of the measuring shaft extends to the position beyond the bottom of the measuring hole sleeve, the bottom surface edge of the working end forms a chamfer inclined surface, the bottom surface of the working end of the measuring shaft is provided with a guide part, the outer diameter of the guide part is matched with the inner hole diameter of a workpiece to be measured, the chamfer inclined surface is guided to be contacted with the inner hole chamfer of the workpiece to be measured, and in a use state, the chamfer inclined surface is contacted with the inner hole chamfer surface of the workpiece to be measured, and the axial coordinate of the inner hole chamfer of the workpiece to be measured is obtained through a pointer of the dial indicator. The utility model has simple measurement and convenient operation, and improves the accuracy and efficiency of measurement.

Inventors

• CHEN XIAOZHONG
• CHEN CHAO

Assignees

• 上海振华轴承总厂有限公司

Dates

Publication Date

20260512

Application Date

20250530

Claims (6)

1. 1. An inner hole chamfer coordinate measuring device is characterized by comprising, The measuring hole sleeve is a middle hole sleeve body; The dial indicator is detachably and fixedly arranged at the top of the measuring hole sleeve, and a measuring rod of the dial indicator is positioned in the hollow cavity of the measuring hole sleeve; The measuring shaft is movably arranged in the hollow cavity of the measuring hole sleeve and can move up and down along the axis of the measuring hole sleeve, and the top surface of the measuring shaft is contacted with the measuring rod of the dial indicator; In a use state, the chamfer inclined surface is in contact with an inner hole chamfer surface of a workpiece to be measured, the measuring rod is stressed, and the axial coordinate of the inner hole chamfer of the workpiece to be measured is obtained through a pointer of a dial indicator.
2. 2. The inner hole chamfer coordinate measuring device according to claim 1, wherein the top of the measuring hole sleeve is fixedly connected with a gland for fixing a dial indicator in a detachable mode, and a measuring rod of the dial indicator penetrates through the gland to be in contact with the top surface of the measuring shaft.
3. 3. The inner hole chamfer coordinate measuring device according to claim 2, wherein a gap is formed between the gland and the measuring shaft, a compression spring is arranged at the gap, one end of the compression spring is contacted with the bottom surface of the gland, and the other end is contacted with the top surface of the measuring shaft, and the self elasticity of the compression spring is utilized to provide pretightening force and restoring elasticity for the measuring shaft.
4. 4. The bore chamfer coordinate measuring device of claim 1, wherein the measuring shaft is in clearance fit with a measuring bore sleeve.
5. 5. The hole chamfer coordinate measuring device of claim 1, wherein the guide is a stepped shaft.
6. 6. The device for measuring the inner hole chamfer coordinates according to claim 1, wherein the measuring hole sleeve is cylindrical, the aperture of the opening of the bottom end surface of the measuring hole sleeve is smaller than the outer diameter of the measuring shaft and larger than the outer diameter of the working end, and the measuring shaft is limited in the hollow cavity of the measuring hole sleeve.

Description

Inner hole chamfer coordinate measuring device Technical Field The utility model belongs to the technical field of chamfer measuring devices, in particular to a device for measuring orifice chamfer coordinate dimensions, and particularly relates to an inner hole chamfer coordinate measuring device. Background The bearing parts all need to be subjected to inner hole machining, the chamfer sizes of the orifices need to be measured, and whether the chamfer sizes meet the requirements of a design drawing is detected. In the prior art, for measuring the orifice chamfer coordinate size, a chamfer caliper and a profilometer are generally adopted for inspection. But the chamfer caliper accuracy is lower, and efficiency is lower, and the profiler accuracy is higher, and efficiency is lower. Therefore, the prior art measurement method of the orifice chamfer coordinate size cannot meet the production requirement. In view of the foregoing, it is desirable to design a new measuring tool to quickly and accurately measure the orifice chamfer coordinate size. Disclosure of utility model In order to solve the technical problems, the utility model provides a measuring device capable of rapidly and accurately measuring the inner hole chamfer angle coordinates. The utility model is realized by the following technical proposal that the inner hole chamfering coordinate measuring device comprises, The measuring hole sleeve is a middle hole sleeve body; The dial indicator is detachably and fixedly arranged at the top of the measuring hole sleeve, and a measuring rod of the dial indicator is positioned in the hollow cavity of the measuring hole sleeve; The measuring shaft is movably arranged in the hollow cavity of the measuring hole sleeve and can move up and down along the axis of the measuring hole sleeve, and the top surface of the measuring shaft is contacted with the measuring rod of the dial indicator; In a use state, the chamfer inclined surface is in contact with an inner hole chamfer surface of a workpiece to be measured, the measuring rod is stressed, and the axial coordinate of the inner hole chamfer of the workpiece to be measured is obtained through a pointer of a dial indicator. According to the utility model, the top of the measuring hole sleeve is fixedly connected with a gland for fixing the dial indicator in a detachable mode, and a measuring rod of the dial indicator penetrates through the gland to be in contact with the top surface of the measuring shaft. According to the utility model, a space is arranged between the gland and the measuring shaft, a pressure spring is arranged at the space, one end of the pressure spring is contacted with the bottom surface of the gland, and the other end is contacted with the top surface of the measuring shaft, so that the self elasticity of the pressure spring is utilized to provide a pretightening force and a resetting elasticity for the measuring shaft. According to the utility model, the measuring shaft is in clearance fit with the measuring bush. According to the present utility model, further, the guide part is a stepped shaft. According to the utility model, the measuring hole sleeve is cylindrical, the aperture of the bottom end surface of the measuring hole sleeve is smaller than the outer diameter of the measuring shaft and larger than the outer diameter of the working end, and the measuring shaft is limited in the hollow cavity of the measuring hole sleeve. Compared with the prior art, the utility model has the beneficial effects that the chamfer inclined surface is stably and accurately contacted with the inner hole chamfer of the workpiece to be measured through the guide part arranged at the bottom of the working end of the measuring shaft, so that the measuring precision is improved. The utility model has simple structure, easy processing and assembly and convenient production field use. The utility model has simple measurement and convenient operation, and improves the accuracy and efficiency of measurement. Drawings FIG. 1 is a schematic diagram of the structure of the inner hole chamfer coordinate measuring device of the present utility model; FIG. 2 is a schematic view of the structure of the measuring shaft of the present utility model; fig. 3 is a partially enlarged schematic view at a of fig. 1. The device comprises a 100-measuring hole sleeve, a 200-dial indicator, a 210-measuring rod, a 300-measuring shaft, a 310-working end, a 311-chamfer inclined plane, a 400-gland, a 500-pressure spring and a 600-guide part. Detailed Description In order to facilitate understanding of the objects and effects of the present utility model, the following embodiments of the present utility model are described in detail with reference to the accompanying drawings: As shown in fig. 1 to 3, there is provided an inner hole chamfer coordinate measuring device for measuring a chamfer of an inner hole of a roller, which comprises a hollow measuring hole sleeve 100, wherein a d