Motor output shaft coaxiality measuring device

Abstract

The utility model relates to the field of measuring devices, in particular to a motor output shaft coaxiality measuring device which comprises a base, an accompanying test motor, a clamp and a measuring pen, the accompanying test motor is connected to the surface of the base, one end of the clamp is connected to a shaft of the accompanying test motor, and the other end of the clamp is connected to the measuring pen. The test accompanying motor drives the clamp to rotate around the axis of the shaft of the test accompanying motor, and the measuring end of the measuring pen is attached to the peripheral surface of the output shaft of the motor. Through the arrangement of the accompanying test motor, the clamp and the measuring pen, the measuring end of the measuring pen is not influenced by self gravity and is stably attached to the bottom end of the motor output shaft, so that the measuring precision of the motor output shaft is improved.

Description

Technical Field

[0001] The present application relates to the field of measuring devices, and in particular to a device for measuring the coaxiality of a motor output shaft. Background Art

[0002] The motor output shaft is a shaft on the motor casing. It extends outward and connects to the outside world. It is the output end of the motor. The motor output shaft is usually used to connect to driving equipment such as pumps, fans, reducers or transmission devices.

[0003] In the prior art, the coaxiality of the motor output shaft and the shaft of the test motor is measured by a dial indicator. However, when the measuring end of the dial indicator abuts the bottom end of the motor output shaft, the needle on the dial indicator is easily affected by its own gravity and cannot fit the bottom end of the motor output shaft, thereby reducing the measurement accuracy of the motor output shaft. Utility Model Content

[0004] In order to improve the problem of measuring the output shaft of a motor, the present application provides a device for measuring the coaxiality of the output shaft of a motor.

[0005] This application provides a motor output shaft coaxiality measurement device, which adopts the following technical solution:

[0006] A device for measuring the coaxiality of a motor output shaft comprises a base, a test motor, a fixture and a measuring pen. The test motor is connected to the surface of the base, one end of the fixture is connected to the shaft of the test motor, and the other end of the fixture is connected to the measuring pen. The test motor drives the fixture to rotate around the axis of the test motor shaft, and the measuring end of the measuring pen is in contact with the outer circumference of the motor output shaft.

[0007] By adopting the above technical solution, the motor is placed on the surface of the base, the motor output shaft faces the shaft of the test motor, and the measuring end of the measuring pen is in contact with the outer circumference of the motor output shaft. The test motor runs and drives the fixture to rotate around the axis of the test motor shaft. The measuring pen is connected to the fixture, driving the measuring pen to rotate around the outer circumference of the motor output shaft. When the measuring end of the measuring pen abuts the bottom end of the motor output shaft, the measuring end of the measuring pen is not affected by its own gravity and is stably in contact with the bottom end of the motor output shaft, thereby improving the measurement accuracy of the motor output shaft.

[0008] Optionally, the accompanying test motor is connected to a frequency converter, and the frequency converter can control the driving and speed regulation of the accompanying test motor.

[0009] By adopting the above technical solution, the drive and speed regulation of the test motor are controlled by the frequency converter, so that the measuring end of the measuring pen can accurately fit the measured surface of the motor output shaft, further improving the coaxiality detection accuracy between the motor output shaft and the test motor.

[0010] Optionally, the fixture has a positioning cavity for the test motor shaft to be embedded in, and the inner wall of the positioning cavity can press against the outer peripheral surface of the test motor shaft to form a limit.

[0011] By adopting the above technical solution, when the shaft of the test motor is embedded in the positioning cavity, the inner wall of the positioning cavity presses against the outer peripheral surface of the shaft of the test motor to form a limit, making it difficult for the clamp to separate from the shaft of the test motor, thereby improving the connection stability between the clamp and the test motor.

[0012] Optionally, the clamp includes a fixing portion, a positioning portion and a fixing bolt, the fixing bolt passes through the fixing portion and is threadedly tightened and fixed on the surface of the positioning portion, and the positioning cavity is located between the fixing portion and the positioning portion.

[0013] By adopting the above technical solution, when the fixing part and the positioning part clamp the two ends of the test motor shaft, the fixing bolt passes through the fixing part and is threaded and tightened to be fixed on the surface of the positioning part, thereby realizing the limitation of the fixing part on the surface of the positioning part. At the same time, the detachable connection between the fixing part and the positioning part realizes the adjustable change of the positioning cavity space, so that the clamp can adapt to different test motor shaft sizes, thereby improving the versatility of the clamp.

[0014] Optionally, a limiting hole is provided on the surface of the positioning portion for the measuring pen to pass through, and the inner wall of the limiting hole can press against the outer peripheral surface of the measuring pen to form a limit.

[0015] By adopting the above technical solution, when the measuring end of the measuring pen passes through the limiting hole and fits against the outer circumference of the motor output shaft, the inner wall of the limiting hole presses against the outer circumference of the measuring pen to form a limit, making it difficult for the measuring pen to separate from the fixture, thereby improving the connection stability between the measuring pen and the fixture.

[0016] Optionally, a plurality of the limiting holes are provided, and the arrangement direction of the limiting holes is parallel to the axis of the test motor shaft.

[0017] By adopting the above technical solution, when the motor is placed on the surface of the base, the measuring pen selects the corresponding limit hole according to the distance between the motor and the companion motor. The measuring end of the side wall pen passes through the limit hole and fits the outer peripheral surface of the motor output shaft. There is no need to constantly adjust the position of the motor on the base surface, thereby improving the measurement efficiency of the motor output shaft.

[0018] Optionally, a deformation space is opened on the surface of the positioning portion, and the deformation space is connected to a plurality of limiting holes.

[0019] By adopting the above technical solution, the deformation space is connected to multiple limit holes. When the measuring end of the measuring pen passes through the limit hole and abuts the outer peripheral surface of the motor output shaft, the inner wall of the limit hole is squeezed and deformed by the measuring pen. The deformation space provides a deformation gap for the deformation of the inner wall of the limit hole, making the positioning part less likely to wear, thereby extending the service life of the fixture.

[0020] Optionally, the positioning portion is threadedly connected to a limiting bolt, the limiting bolt is threadedly tightened and fixed on the surface of the positioning portion, and the inner wall of the limiting hole is pressed against the outer peripheral surface of the measuring pen to form a limit.

[0021] By adopting the above technical solution, when the measuring end of the measuring pen passes through the limiting hole and fits into the outer circumference of the motor output shaft, the limiting bolt is threaded and fixed on the surface of the positioning part, driving the inner wall of the deformation space to deform, and the inner wall of the limiting hole presses against the outer circumference of the measuring pen to form a limit, making it difficult for the measuring pen to separate from the positioning part, thereby improving the connection stability between the measuring pen and the positioning part.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. The setting of the test motor, fixture and measuring pen is such that the measuring end of the measuring pen is not affected by its own gravity and stably fits the bottom end of the motor output shaft, thereby improving the measurement accuracy of the motor output shaft;

[0024] 2. The inverter is set up so that the measuring tip of the measuring pen can accurately fit the measured surface of the motor output shaft, further improving the coaxiality detection accuracy between the motor output shaft and the test motor;

[0025] 3. The setting of the positioning cavity makes it difficult for the fixture to separate from the shaft of the test motor, thereby improving the connection stability between the fixture and the test motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure in the embodiment of the present application.

[0027] Figure 2 It is a schematic diagram of the overall structure of the clamp in the embodiment of the present application.

[0028] Explanation of the accompanying reference numerals: 1. Base; 2. Test motor; 3. Clamp; 31. Fixing part; 311. Positioning cavity; 32. Positioning part; 321. Limiting hole; 322. Connecting section; 323. Limiting section 1; 324. Limiting section 2; 325. Deformation space; 33. Fixing bolt; 4. Measuring pen; 5. Limiting bolt. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-2 This application is described in further detail.

[0030] The embodiment of the present application discloses a device for measuring the coaxiality of a motor output shaft. Figure 1The motor output shaft coaxiality measuring device includes a base 1, a test motor 2, a fixture 3 and a measuring pen 4. The bottom of the base 1 is pressed against the ground to form a support. The test motor 2 is fixed to the top surface of the base 1 by bolts. One end of the fixture 3 is installed on the base 1, and the other end of the fixture 3 is installed on the measuring pen 4. The measuring end of the measuring pen 4 fits the outer circumference of the motor output shaft. The operation of the test motor 2 drives the fixture 3 to rotate around the axis of the machine shaft, driving the measuring end of the measuring pen 4 to rotate around the outer circumference of the motor output shaft. The measuring end of the measuring pen 4 is not affected by its own gravity and stably fits the outer circumference of the motor output shaft, thereby improving the measurement accuracy of the motor output shaft.

[0031] Reference Figure 1 The test motor 2 is connected to a frequency converter, which can control the drive and speed regulation of the test motor 2. In the embodiment of the present application, the frequency converter controls the test motor 2 to rotate 0°, 90°, 180° and 270° in sequence. At the same time, the measuring end of the measuring pen 4 measures the values of the corresponding positions of the motor output shaft in sequence, and adjusts the coaxiality between the motor output shaft and the shaft of the test motor 2 according to the four values, thereby improving the detection accuracy of the motor output shaft.

[0032] Reference Figure 1 and Figure 2 The cam 32 is provided with a screw thread on the top of the fixing portion 31 so as to prevent the cam 32 from being detached from the fixing portion 31 and the fixing bolt 33 is provided.

[0033] Reference Figure 1 and Figure 2The surface of the positioning portion 32 is provided with a limiting hole 321 for the measuring pen 4 to pass through. The measuring end of the measuring pen 4 can pass through the limiting hole 321 and fit the outer circumference of the motor output shaft, and the inner wall of the limiting hole 321 can be pressed against the outer circumference of the measuring pen 4 to form a limit; the number of limiting holes 321 can be one, two or more. In the embodiment of the present application, the number of limiting holes 321 is multiple, and the arrangement direction of the limiting holes 321 is parallel to the axis of the shaft of the test motor 2. The staff selects the corresponding limiting hole 321 according to the distance between the motor and the test motor 2. The measuring end of the measuring pen 4 passes through the limiting hole 321 and fits the outer circumference of the motor output shaft. There is no need to repeatedly adjust the position of the motor on the base 1, thereby improving the detection efficiency of the motor output shaft.

[0034] Reference Figure 1 and Figure 2 The positioning portion 32 includes a connecting section 322, a limiting section 1 323 and a limiting section 2 324. The positioning cavity 311 is located between the connecting section 322 and the fixing portion 31. The limiting section 1 323 and the limiting section 2 324 are fixed at intervals on the surface of the connecting section 322. The limiting hole 321 is located between the limiting section 1 323 and the limiting section 2 324, and a deformation space 325 is left between the limiting section 1 323 and the limiting section 2 324. The deformation space 325 connects multiple limiting holes 321. The deformation space 325 provides a deformation gap for the limiting hole 321 to be compressed and deformed, thereby reducing the wear on the clamp 3 and thus extending the service life of the clamp 3.

[0035] Reference Figure 1 and Figure 2 The positioning part 32 is threadedly connected to the limiting bolt 5, the end of the limiting bolt 5 passes through the limiting section 1 323 and is threadedly tightened and fixed on the surface of the limiting section 2 324. The inner wall of the limiting hole 321 is pressed against the circumferential outer wall of the measuring pen 4 to form a limit, so that the measuring pen 4 is not easy to separate from the positioning part 32, thereby improving the connection stability between the measuring pen 4 and the positioning part 32.

[0036] Reference Figure 1 and Figure 2 The number of limiting bolts 5 can be one, two or more. In the embodiment of the present application, the number of limiting bolts 5 is multiple, and the limiting bolts 5 are located between adjacent limiting holes 321. When the limiting bolts 5 are tightened, the limiting section 1 323 and the limiting section 2 324 are driven to approach each other, driving the inner wall of the limiting hole 321 to press against the circumferential outer wall of the measuring pen 4, thereby improving the limiting stability of the measuring pen 4 on the positioning portion 32.

[0037] The implementation principle of a motor output shaft coaxiality measuring device in an embodiment of the present application is: the frequency converter controls the test motor 2 to rotate 0°, 90°, 180° and 270° in sequence, and at the same time, the measuring end of the measuring pen 4 measures the values of the corresponding positions of the motor output shaft in sequence, and adjusts the coaxiality between the motor output shaft and the shaft of the test motor 2 according to the four values to improve the detection accuracy of the motor output shaft; the measuring end of the measuring pen 4 is not affected by its own gravity and stably fits the outer peripheral surface of the motor output shaft, thereby improving the measurement accuracy of the motor output shaft.

[0038] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. The motor output shaft coaxiality measuring device is characterized by: The invention comprises a base (1), a test motor (2), a fixture (3) and a measuring pen (4); the test motor (2) is connected to the surface of the base (1); one end of the fixture (3) is connected to the shaft of the test motor (2); the other end of the fixture (3) is connected to the measuring pen (4); the test motor (2) drives the fixture (3) to rotate around the axis of the shaft of the test motor (2); and the measuring end of the measuring pen (4) is in contact with the outer peripheral surface of the motor output shaft.

2. The motor output shaft coaxiality measuring device according to claim 1, characterized in that: The accompanying test motor (2) is connected to a frequency converter, and the frequency converter can control the driving and speed regulation of the accompanying test motor (2).

3. The motor output shaft coaxiality measuring device according to claim 1, characterized in that: The clamp (3) has a positioning cavity (311) for the shaft of the accompanying test motor (2) to be embedded, and the inner wall of the positioning cavity (311) can press against the outer peripheral surface of the shaft of the accompanying test motor (2) to form a limit.

4. The motor output shaft coaxiality measuring device according to claim 3, characterized in that: The clamp (3) comprises a fixing portion (31), a positioning portion (32) and a fixing bolt (33); the fixing bolt (33) passes through the fixing portion (31) and is screwed and fixed on the surface of the positioning portion (32); and the positioning cavity (311) is located between the fixing portion (31) and the positioning portion (32).

5. The motor output shaft coaxiality measuring device according to claim 4, characterized in that: A limiting hole (321) for the measuring pen (4) to pass through is provided on the surface of the positioning portion (32), and the inner wall of the limiting hole (321) can press against the outer peripheral surface of the measuring pen (4) to form a limit.

6. The motor output shaft coaxiality measuring device according to claim 5, characterized in that: A plurality of the limiting holes (321) are provided, and the arrangement direction of the limiting holes (321) and the axis of the shaft of the accompanying test motor (2) are parallel to each other.

7. The motor output shaft coaxiality measuring device according to claim 6, characterized in that: A deformation space (325) is provided on the surface of the positioning portion (32), and the deformation space (325) is connected to a plurality of limiting holes (321).

8. The motor output shaft coaxiality measuring device according to claim 7, characterized in that: The positioning portion (32) is threadedly connected to a limiting bolt (5), the limiting bolt (5) is threadedly screwed and fixed on the surface of the positioning portion (32), and the inner wall of the limiting hole (321) is pressed against the outer peripheral surface of the measuring pen (4) to form a limit.

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