Motor shaft hole inner diameter measuring device

Abstract

The utility model discloses a motor shaft hole inner diameter measuring device which comprises a circular shaft, a fixed measuring mark is arranged on the outer side face of one end of the circular shaft, a movable measuring mark is arranged above the fixed measuring mark, the movable measuring mark can rotate around the circular shaft by 180 degrees, the outer side face of the circular shaft is rotationally connected with a rotating sleeve through a bearing, and the rotating sleeve is connected with a rotating shaft. The outer side surface of the rotating sleeve is provided with a fixed box, one side of the fixed box is provided with a groove, the groove is internally provided with a sleeve rod, the outer side surface of the sleeve rod is slidably connected with a sliding block, and one end of the movable measuring mark is fixedly connected with the sliding block. And the motor shaft installation stability is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of motor shaft detection, in particular to a motor shaft hole inner diameter measuring device. Background Art

[0002] The inner hole of the motor shaft refers to a blind hole on the motor shaft, which is generally set at both ends of the motor shaft. It is usually used to receive bearings, pins and other fixing devices of other components. It is also used to lock the position of the shaft to prevent the shaft from running too far or too far.

[0003] The connection stability between the motor shaft and other components is crucial, and is related to the working stability and service life of the motor shaft. Therefore, there are strict requirements on the inner hole size of the motor shaft. The current method of measuring the inner hole of the motor shaft is usually a vernier caliper. However, during use, the vernier caliper cannot ensure that the distance between the two inner jaws is the diameter of the inner hole, and there is a large error, which in turn affects the stability of the motor shaft installation. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a motor shaft hole inner diameter measuring device, which can improve the measurement accuracy of the motor shaft inner hole, ensure the stability of the motor shaft installation, and effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a device for measuring the inner diameter of a motor shaft hole, comprising a circular shaft, a fixed measuring mark being arranged on the outer side surface of one end of the circular shaft, a movable measuring mark being arranged above the fixed measuring mark, and the movable measuring mark being rotatable 180° around the circular shaft.

[0006] As a preferred technical solution of the utility model, the outer side surface of the circular shaft is rotatably connected to a rotating sleeve through a bearing, the outer side surface of the rotating sleeve is provided with a fixed box, one side of the fixed box is provided with a groove, a sleeve rod is provided in the groove, the outer side surface of the sleeve rod is slidably connected to a slider, and one end of the movable measuring mark is fixedly connected to the slider.

[0007] As a preferred technical solution of the utility model, a strip hole is provided on one side of the fixing box, a locking stud is provided on one end of the sliding block, and the locking stud passes through the strip hole.

[0008] As a preferred technical solution of the utility model, two limit bars are arranged on the outer side surface of the circular shaft, the included angle of the two limit bars is 180°, and the height of the limit bars is not less than the height of the movable measuring mark.

[0009] As a preferred technical solution of the utility model, a handle is provided at the other end of the circular shaft.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows: the motor shaft hole inner diameter measuring device is reasonably designed and compact in structure. By setting a fixed measuring mark and a movable measuring mark, the movable measuring mark can be rotated 180° when measuring the inner hole of the motor shaft, ensuring that the fixed measuring mark and the movable measuring mark are on the diameter of the inner hole of the motor shaft. Both the fixed measuring mark and the movable measuring mark contact the inner hole of the motor shaft, and the distance between the two is the inner hole diameter of the motor shaft. The distance between the two can be measured by a vernier caliper, which greatly improves the measurement accuracy of the inner hole of the motor shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is the front view of the utility model.

[0013] In the figure: 1 circular shaft, 2 fixed measuring mark, 3 movable measuring mark, 4 rotating sleeve, 5 bearing, 6 fixed box, 7 groove, 8 sleeve rod, 9 slider, 10 strip hole, 11 locking stud, 12 limit strip, 13 handle. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] See also Figure 1-2 The utility model provides a technical solution: a motor shaft hole inner diameter measuring device, comprising a round shaft 1, a fixed measuring mark 2 is arranged on the outer side surface of one end of the round shaft 1, a movable measuring mark 3 is arranged above the fixed measuring mark 2, the outer side surface of the round shaft 1 is rotatably connected with a rotating sleeve 4 through a bearing 5, a fixed box 6 is arranged on the outer side surface of the rotating sleeve 4, a groove 7 is opened on one side of the fixed box 6, a sleeve rod 8 is arranged in the groove 7, a slider 9 is slidably connected to the outer side surface of the sleeve rod 8, one end of the movable measuring mark 3 is fixedly connected to the slider 9, and the movable measuring mark 3 is rotated 180° together by rotating the rotating sleeve 4, ensuring that the spacing between the movable measuring mark 3 and the fixed measuring mark 2 is the diameter of the inner hole of the motor shaft, and at the same time, by arranging a movable slider 9, it can be adjusted according to the different sizes of the inner diameter of the motor shaft, thereby improving the versatility of use.

[0016] In order to ensure that the rotation angle of the movable measuring mark 3 is 180°, two limit bars 12 are provided on the outer side of the circular shaft 1. The included angle of the two limit bars 12 is 180°, and the height of the limit bar 12 is not less than the height of the movable measuring mark 3. At the starting position, the movable measuring mark 3, the fixed measuring mark 2 and one of the limit bars 12 are on the same straight line. When the movable measuring mark 3 rotates, it touches the other limit bar 12, proving that the rotation angle of the movable measuring mark is 180°.

[0017] Furthermore, in order to fix the position of the movable measuring mark 3 and facilitate the vernier caliper to measure the distance between the movable measuring mark 3 and the fixed measuring mark, a strip hole 10 is provided on one side of the fixing box 6, and a locking stud 11 is provided at one end of the slider 9, and the locking stud 11 passes through the strip hole 10.

[0018] Furthermore, a handle 13 is provided at the other end of the circular shaft 1 to facilitate workers to carry and operate it.

[0019] During use: adjust the position of the movable measuring mark 3 to be directly above the fixed measuring mark 2, and the movable measuring mark 3 is fitted with one of the limit strips 12, extend the device into the inner hole of the motor shaft, so that the fixed measuring mark 2 is close to the side wall of the inner hole, and then rotate the rotating sleeve 4 to drive the movable measuring mark 3 to rotate together until the movable measuring mark 3 touches the other limit strip 12, that is, the angle between the movable measuring mark 3 and the fixed measuring mark 2 is 180°, according to the inner hole diameter of the motor shaft, loosen the locking stud 11, slide the slider 9, so that the movable measuring mark 3 is close to the inner hole side wall of the motor shaft, and then tighten the locking stud 11, at this time, the distance between the movable measuring mark 3 and the fixed measuring mark 2 is the inner hole diameter of the motor shaft, and the aperture of the motor shaft can be accurately obtained by measuring the distance between the fixed measuring mark 2 and the movable measuring mark 3 with a vernier caliper.

[0020] The utility model can be conveniently operated, occupies little space when in use, is easy to operate and use; can accurately measure the inner hole diameter of the motor shaft, and improves the hole diameter measurement accuracy; the arrangement of the slide block 9 and the sleeve rod 8 is suitable for measuring the diameters of different inner holes of the motor shaft, and improves the versatility of use.

[0021] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A motor shaft hole inner diameter measuring device, characterized in that: It comprises a circular shaft (1), wherein a fixed measuring mark (2) is arranged on the outer side surface of one end of the circular shaft (1), and a movable measuring mark (3) is arranged above the fixed measuring mark (2), and the movable measuring mark (3) can rotate 180 degrees around the circular shaft (1).

2. The motor shaft hole inner diameter measuring device according to claim 1, characterized in that: The outer side surface of the circular shaft (1) is rotatably connected to a rotating sleeve (4) via a bearing (5); a fixed box (6) is provided on the outer side surface of the rotating sleeve (4); a groove (7) is provided on one side of the fixed box (6); a sleeve rod (8) is provided in the groove (7); a slider (9) is slidably connected to the outer side surface of the sleeve rod (8); and one end of the movable measuring mark (3) is fixedly connected to the slider (9).

3. The motor shaft hole inner diameter measuring device according to claim 2, characterized in that: A strip-shaped hole (10) is provided on one side of the fixing box (6), and a locking stud (11) is provided on one end of the sliding block (9), and the locking stud (11) passes through the strip-shaped hole (10).

4. The motor shaft hole inner diameter measuring device according to claim 1, characterized in that: Two limit strips (12) are arranged on the outer side surface of the circular shaft (1), the included angle of the two limit strips (12) is 180°, and the height of the limit strip (12) is not less than the height of the movable measuring mark (3).

5. The motor shaft hole inner diameter measuring device according to claim 1, characterized in that: The other end of the circular shaft (1) is provided with a handle (13).

Images