CN219640866U

CN219640866U - Coaxial measuring tool for inner hole of outer ring groove

Info

Publication number: CN219640866U
Application number: CN202320600935.8U
Authority: CN
Inventors: 周兴伟; 郑海峰
Original assignee: Chenzhi Technology Co ltd; CSG TRW Chassis Systems Co Ltd
Current assignee: Chenzhi Technology Co ltd; CSG TRW Chassis Systems Co Ltd
Priority date: 2023-03-23
Filing date: 2023-03-23
Publication date: 2023-09-05
Anticipated expiration: 2033-03-23

Abstract

The utility model belongs to the field of automobile part detection, and relates to an outer ring groove pair inner hole coaxiality measuring tool which comprises a workpiece, a dial indicator, a locking sleeve, a locking screw, a measuring body, a spring, a measuring head and a mandrel, wherein the measuring body is provided with a plurality of grooves; the lower end of the measuring body is provided with a cylinder which is matched and installed with a reference hole of the workpiece; the dial indicator is arranged in the measuring body hole through the locking sleeve and is locked by the locking screw; the measuring head is arranged in a groove at the left end of the measuring body through the mandrel and can rotate around the mandrel; the spring is arranged in the measuring body hole and pushes against the measuring head, so that the measuring head is in close contact with the measured surface. The utility model has simple structure, does not need other auxiliary detection devices, has low detection cost, is convenient and flexible to use, and is very suitable for being used on production sites; meanwhile, the measurement accuracy can reach 0.01mm stably, and the detection efficiency is improved by 3 times compared with that of the traditional measurement mode.

Description

Coaxial measuring tool for inner hole of outer ring groove

Technical Field

The utility model belongs to the field of automobile part detection, and relates to an outer ring groove pair inner hole coaxiality measuring tool.

Background

The bracket is a key part of an automobile brake, and because the part belongs to a special-shaped part, the structure is complex, the coaxiality of a shaft pin hole and an outer circular groove of the part needs to be detected according to the requirement, a universal measuring method is used in a traditional mode, a special device is required to be used for clamping and fixing the part on a dividing head, a measuring platform, a dial indicator seat, a dial indicator and the like are also required, the runout of an inner hole and the outer groove is respectively detected through a rotating part, and the difference is a detection result; however, the measuring mode has high detection cost, complex detection method, long measurement time and low detection efficiency, and is only suitable for small-batch or sample production, and is not suitable for mass production.

Disclosure of Invention

Therefore, the utility model aims to provide the measuring tool for the coaxiality of the outer ring groove and the inner hole, which has the advantages of simple detection mode, high detection efficiency and reliable detection result.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the measuring tool comprises a workpiece, a dial indicator, a locking sleeve, a locking screw, a measuring body, a spring, a measuring head and a mandrel; the lower end of the measuring body is provided with a cylinder which is matched and installed with a reference hole of the workpiece; the dial indicator is arranged in the measuring body hole through the locking sleeve and is locked by the locking screw; the measuring head is arranged in a groove at the left end of the measuring body through the mandrel and can rotate around the mandrel; the spring is arranged in the measuring body hole and pushes against the measuring head, so that the measuring head is in close contact with the measured surface.

Optionally, the distance H1 of the measuring head from the spindle is equal to the distance H2 of the contact position of the dial gauge measuring head with the measuring head.

Optionally, the cylinder at the lower end of the measuring body is matched with the reference hole of the workpiece according to the H6 level precision.

Optionally, the measuring head is matched with the groove at the left end of the measuring body according to the H6 level precision.

Alternatively, the measuring head is fitted with the spindle with H6 precision.

Optionally, the shape of the tight contact point between the measuring head and the measured surface of the workpiece is spherical.

The utility model has the beneficial effects that: the measuring tool for the coaxiality of the outer ring groove and the inner hole has the advantages of simple structure, no need of other auxiliary detection devices, low detection cost, convenient and flexible use, and suitability for being used on production sites; meanwhile, the measurement accuracy can reach 0.01mm stably, and the detection efficiency is improved by 3 times compared with that of the traditional measurement mode.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model. The objects and other advantages of the utility model may be realized and obtained by means of the instrumentalities and combinations particularly pointed out in the specification.

Drawings

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the present utility model will be described in the following preferred detail with reference to the accompanying drawings, in which:

FIG. 1 is a schematic diagram of the overall structure of the present utility model;

FIG. 2 is a schematic diagram of the detection element of the present utility model;

FIG. 3 is a top view of the present utility model;

fig. 4 is a cross-sectional view of D-D in fig. 1.

Reference numerals: the device comprises a workpiece 1, a dial indicator 2, a locking sleeve 3, a locking screw 4, a measuring body 5, a spring 6, a measuring head 7 and a mandrel 8;

wherein H1 is the distance between the measuring head and the mandrel; h2 is the distance between the dial indicator measuring head and the contact position of the measuring head; d2 is the reference hole diameter; d1 is the diameter of the groove to be measured; d3 is the coaxiality requirement of D1, D2.

Detailed Description

Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model. It should be noted that the illustrations provided in the following embodiments merely illustrate the basic idea of the present utility model by way of illustration, and the following embodiments and features in the embodiments may be combined with each other without conflict.

Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to limit the utility model; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are terms such as "upper", "lower", "left", "right", "front", "rear", etc., that indicate an azimuth or a positional relationship based on the azimuth or the positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but not for indicating or suggesting that the referred device or element must have a specific azimuth, be constructed and operated in a specific azimuth, so that the terms describing the positional relationship in the drawings are merely for exemplary illustration and should not be construed as limiting the present utility model, and that the specific meaning of the above terms may be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 and 3, the measuring tool for coaxiality of the inner hole and the outer ring groove is shown, and comprises a workpiece 1, a dial indicator 2, a locking sleeve 3, a locking screw 4, a measuring body 5, a spring 6, a measuring head 7 and a mandrel 8; the lower end of the measuring body 5 is provided with a cylinder which is matched with a reference hole of the workpiece 1 according to the H6 level precision, and a proper gap between the measuring tool and the measured reference hole is ensured so as to be beneficial to the rotation of the measuring tool, and the dial indicator 2 is arranged in the hole of the measuring body 5 through the locking sleeve 3 and is locked by the locking screw 4.

As shown in fig. 4, the measuring head 7 is mounted in a groove at the left end of the measuring body 5 through a mandrel 8 and is matched with the groove according to the H6 level precision, so that the transverse movement of the measuring head 7 is reduced, the measuring precision is improved, the measuring head can rotate around the mandrel 8 for a certain angle, and the spring 6 is mounted in a hole of the measuring body 5 and abuts against the measuring head 7, so that the measuring head 7 is in tight contact with a measured surface. As shown in fig. 2, D2 is the reference hole diameter, D1 is the measured groove diameter, and D3 is the coaxiality requirement of D1, D2.

In the embodiment, the measuring head 7 is matched with the mandrel 8 according to the H6 level precision, so that proper clearance and measuring precision are ensured.

In the embodiment, the spring 6 pushes the measuring head 7, so that the measuring head 7 is forced to be in close contact with the measured surface of the workpiece 1 in the measuring process, and the measuring precision is improved.

In this embodiment, the shape of the tight contact point between the measuring head 7 and the measured surface of the workpiece 1 is spherical, so that the measuring head 7 and the measured surface are in point contact, and the measuring accuracy is improved.

In this embodiment, the distance H1 between the measuring head 7 and the spindle 8 is equal to the distance H2 between the contact positions of the dial indicator measuring head and the measuring head 7, so as to ensure that the actual value of the part error is consistent with the display value of the dial indicator, and ensure the measurement accuracy.

In the embodiment, the flexible dial indicator is adopted for measurement, the detection device is low in cost and high in precision, and the detection device can reach 0.01mm.

When in use, the utility model comprises the following steps:

the first step: the cylinder at the lower end of the measuring body 5 is inserted into the reference hole of the workpiece 1 as shown in fig. 1;

and a second step of: compressing the spring 6 to make the measuring head 7 outwards expand and clamp the measuring head 7 into the groove to be measured;

and a third step of: and rotating the measuring tool for a circle, wherein the change value of the dial indicator is the measurement result.

The utility model has simple structure, does not need other auxiliary detection devices, has low manufacturing cost and detection cost, can finish operation by one hand, is convenient and flexible to use, and is very suitable for being used on production sites; the measuring tool has strong universality and is suitable for various parts with similar measurement requirements; meanwhile, the measuring precision of the measuring tool can reach 0.01mm stably, and the detection efficiency is improved by 3 times compared with that of the traditional measuring mode.

Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the present utility model, which is intended to be covered by the claims of the present utility model.

Claims

1. The utility model provides an outer loop groove to hole axiality measuring tool which characterized in that: the device comprises a workpiece, a dial indicator, a locking sleeve, a locking screw, a measuring body, a spring, a measuring head and a mandrel; the lower end of the measuring body is provided with a cylinder which is matched and installed with a reference hole of the workpiece; the dial indicator is arranged in the measuring body hole through the locking sleeve and is locked by the locking screw; the measuring head is arranged in a groove at the left end of the measuring body through the mandrel and can rotate around the mandrel; the spring is arranged in the measuring body hole and pushes against the measuring head, so that the measuring head is in close contact with the measured surface.

2. The outer race groove-to-inner bore coaxiality gauge of claim 1, wherein: the distance H1 between the measuring head and the mandrel is equal to the distance H2 between the contact positions of the dial indicator measuring head and the measuring head.

3. The outer race groove-to-inner bore coaxiality gauge of claim 1, wherein: the cylinder at the lower end of the measuring body is matched with the reference hole of the workpiece according to the H6 level precision.

4. The outer race groove-to-inner bore coaxiality gauge of claim 1, wherein: the measuring head is matched with the groove at the left end of the measuring body according to the H6 level precision.

5. The outer race groove-to-inner bore coaxiality gauge of claim 1, wherein: the measuring head is matched with the mandrel according to the H6 level precision.

6. The outer race groove-to-inner bore coaxiality gauge of claim 1, wherein: the shape of the tight contact point between the measuring head and the measured surface of the workpiece is spherical.