CN219347616U

CN219347616U - Instrument for measuring depth of small hole

Info

Publication number: CN219347616U
Application number: CN202320559819.6U
Authority: CN
Inventors: 熊武红; 王国光
Original assignee: Hubei Qianchao Precision Parts Co ltd
Current assignee: Qianchao Zhizao Shishou Co ltd
Priority date: 2023-03-17
Filing date: 2023-03-17
Publication date: 2023-07-14
Anticipated expiration: 2033-03-17

Abstract

The utility model discloses an instrument for measuring the depth of a small hole, which relates to the technical field of measurement and comprises a support frame, a dial indicator and a measuring plate, wherein the top of the support frame is provided with the measuring plate, and the upper surface of the measuring plate forms a measuring plane for placing the large end face of a measured workpiece; the dial indicator is fixed on the support frame, the measuring head of the dial indicator penetrates out of the top of the support frame and penetrates through the measuring plate, and the measuring head extends out of the measuring plane along the vertical direction and is used for extending into and measuring the depth of the small hole. The utility model utilizes the dial indicator to measure the depth of the small hole of the measured workpiece (tapered roller), the measurement result is accurate and reliable, the product quality of the finished product is ensured, and the service life of the bearing is prolonged.

Description

Instrument for measuring depth of small hole

Technical Field

The utility model relates to the field of measurement technology, in particular to an instrument for measuring the depth of a small hole.

Background

In the precision rolling element industry, the measurement error will have an influence on the precision of the product, in particular on the measurement error of the small hole depth. Because the small hole depth measurement is shallow, the small hole depth of the finished tapered roller product can not meet the requirement, and the small hole of the tapered roller plays a role in storing lubricating grease in the tapered roller bearing, so that the friction between the roller and the retainer can be reduced, and the service life of the bearing is prolonged. In the prior art, the main reason for influencing the shallow and shallow of the small hole depth measurement is as follows: when the blank is extruded and formed, the vernier caliper is used for measuring, and due to factors such as reading or non-return of the vernier caliper, measurement errors are generated, so that the depth of the small holes is shallow in the extrusion and forming process of the blank, and finally the service life of the bearing is reduced.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide a tool for measuring the depth of a small hole, which enables the large end face of a tapered roller workpiece to be in contact with the measuring tool, and when the large end face is in complete contact with the measuring tool, the value of a dial indicator is read to obtain the depth value of the small hole of the workpiece. The problem of the measurement of aperture depth inaccuracy in prior art is solved.

The utility model aims at being completed by the following technical scheme: the instrument for measuring the depth of the small hole is used for measuring a measured workpiece, the measured workpiece is provided with a large end face and a small end face opposite to the large end face, the large end face is provided with a small hole along the axial direction, the instrument comprises a support frame, a dial indicator and a measuring plate, the top of the support frame is provided with the measuring plate, and the upper surface of the measuring plate forms a measuring plane for placing the large end face of the measured workpiece; the dial indicator is fixed on the support frame, the measuring head of the dial indicator penetrates out of the top of the support frame and penetrates through the measuring plate, and the measuring head extends out of the measuring plane along the vertical direction and is used for extending into and measuring the depth of the small hole.

As a further technical scheme, the support frame includes upper supporting plate, symmetrical side support plates fixed in upper supporting plate both sides and connects the fixed plate between two side support plates, and the fixed plate is fixed with upper supporting plate connection, the measuring plate is installed at upper supporting plate top.

As a further technical scheme, the dial indicator is fixed on the fixed plate along the vertical direction.

As a further technical scheme, the length of the measuring head extending out of the measuring plane is larger than the depth of a small hole of a standard measured workpiece.

As a further technical solution, the reading of the dial indicator is zero when the standard measured workpiece is placed on the measuring plane.

The beneficial effects of the utility model are as follows:

1. the depth of the small hole of the measured workpiece (tapered roller) is measured by using a dial indicator, the measurement result is accurate and reliable, the product quality of a finished product is ensured, and the service life of the bearing is prolonged;

2. before testing, the dial indicator is subjected to zero setting calibration by a standard component, so that the accuracy of a subsequent test result is ensured;

3. the dial indicator is fixedly installed through the supporting frame, shake is not easy to occur during measurement, and measurement errors are reduced.

Drawings

Fig. 1 is a schematic view of the structure of the present utility model at the time of measurement.

Fig. 2 is a schematic perspective view of the present utility model.

Fig. 3 is an enlarged partial schematic view of the area a in fig. 2.

FIG. 4 is a schematic diagram of the structure of the dial indicator of the present utility model.

Fig. 5 is a schematic structural view of a workpiece to be tested in the present utility model.

Reference numerals illustrate: the device comprises a workpiece 1 to be measured, a large end face 11, a small end face 12, a small hole 13, a support frame 2, a side support plate 21, an upper support plate 22, a fixing plate 23, a dial indicator 3, a measuring head 31, a measuring plate 4 and a measuring plane 41.

Detailed Description

The utility model will be described in detail below with reference to the attached drawings:

examples: as shown in fig. 1 to 5, the instrument for measuring the depth of the small hole comprises a measured workpiece 1, a large end face 11, a small end face 12, a small hole 13, a supporting frame 2, a side supporting plate 21, an upper supporting plate 22, a fixing plate 23, a dial indicator 3, a measuring head 31, a measuring plate 4 and a measuring plane 41.

As shown in fig. 5, the workpiece 1 to be measured has a large end face 11 (bottom) and a small end face 12 (top) opposite to the large end face 11, and a small hole 13 is formed in the large end face 11 in the axial direction. The support frame 2 comprises an upper support plate 22, two side support plates 21 are symmetrically fixed on two sides of the upper support plate 22, a fixing plate 23 is fixedly arranged between the two side support plates 21 through bolt connection, and the top of the fixing plate 23 is fixedly connected with the lower surface of the upper support plate 22 through bolts. The top of the upper supporting plate 22 is provided with a measuring plate 4, and the upper surface of the measuring plate 4 is a measuring plane 41, which can be used for placing the large end face 11 of the measured workpiece 1. The dial indicator 3 is fixed on the support frame 2 (the fixing plate 23) along the vertical direction, as shown in fig. 2 and 3, the measuring head 31 of the dial indicator 3 penetrates out of the top of the support frame 2 (i.e. the upper support plate 22) and penetrates through the measuring plate 4, and the measuring head 31 extends out of the measuring plane 41 along the vertical direction and is used for extending into and measuring the depth of the small hole 13. Preferably, the length of the stylus 31 extending beyond the measurement plane 41 is greater than the depth of the aperture 13 of the standard workpiece 1 being measured. Before testing, a standard workpiece 1 is placed on the measuring plane 41 (probe 31), and the reading of the dial indicator 3 is set to zero. When the gauge head 31 of the dial indicator 3 is propped against the top of the small hole 13 and the large end face 11 is contacted with the measuring plane 41, the reading of the dial indicator 3 is the depth of the small hole 13.

The working process of the utility model comprises the following steps: before measuring the measured workpiece 1, the gauge head 31 of the dial indicator 3 is extruded by using a standard component, so that the large end face 11 of the standard component is in contact with the measuring plane 41, and at the moment, the position of the dial indicator 3 is adjusted, so that the pointer is aligned with the position of the dial "0" of the dial indicator 3, namely, the dial indicator 3 is zeroed. Next, the standard component is removed, the gauge head 31 of the dial indicator 3 is pressed by the measured workpiece 1 until the large end face 11 of the measured workpiece 1 contacts with the measuring plane 41 (as shown in fig. 1), and at this time, the depth value of the small hole 13 of the measured workpiece 1 is obtained from the dial reading of the dial indicator 3.

It should be understood that equivalents and modifications to the technical scheme and the inventive concept of the present utility model should fall within the scope of the claims appended hereto.

Claims

1. A measure aperture depth utensil for measure measured workpiece (1), measured workpiece (1) have big terminal surface (11) and with big terminal surface (11) relative tip (12), offer a aperture (13) along the axial on big terminal surface (11), its characterized in that: the device comprises a support frame (2), a dial indicator (3) and a measuring plate (4), wherein the measuring plate (4) is arranged at the top of the support frame (2), and the upper surface of the measuring plate (4) forms a measuring plane (41) for placing a large end face (11) of a measured workpiece (1); the dial indicator (3) is fixed on the support frame (2), the measuring head (31) of the dial indicator (3) penetrates out of the top of the support frame (2) and penetrates through the measuring plate (4), and the measuring head (31) extends out of the measuring plane (41) along the vertical direction and is used for extending into and measuring the depth of the small hole (13).

2. The instrument for measuring the depth of a small hole according to claim 1, wherein: the support frame (2) comprises an upper support plate (22), side support plates (21) symmetrically fixed on two sides of the upper support plate (22) and a fixing plate (23) connected between the two side support plates (21), wherein the fixing plate (23) is fixedly connected with the upper support plate (22), and the measuring plate (4) is arranged at the top of the upper support plate (22).

3. The instrument for measuring the depth of a small hole according to claim 2, wherein: the dial indicator (3) is fixed on the fixed plate (23) along the vertical direction.

4. A device for measuring the depth of a small hole as defined in claim 3, wherein: the length of the measuring head (31) extending out of the measuring plane (41) is larger than the depth of the small hole (13) of the standard measured workpiece (1).

5. The instrument for measuring the depth of a small hole according to claim 4, wherein: when the standard measured workpiece (1) is placed on the measuring plane (41), the reading of the dial indicator (3) is zero.