Clamp for detecting jumping of motor shaft

Abstract

The utility model belongs to the technical field of fixtures, and particularly relates to a fixture for detecting jumping of a motor shaft, which comprises a base, a micrometer is mounted on the base, a radial clamping mechanism is arranged at the upper end of the base, a threaded shaft is mounted in the base through a bearing, and a moving block is connected to the middle section of a shaft body of the threaded shaft through threads. The top of the moving block is fixedly connected with a baffle, and the baffle is fixedly connected with an end push block. According to the utility model, the radial clamping mechanism is arranged on the base, the cushion blocks on the two L-shaped plates can support the motor shaft, and the lifting of the pressing block can be controlled through the screw thread movement between the adjusting rod and the adjusting rod, so that the motor shaft is clamped in a combined manner by combining the cushion blocks, and a good fixing effect is achieved during the jumping detection of the motor shaft; and the device is suitable for motor shafts with different diameters, and the applicability is good.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically a fixture for detecting the runout of a motor shaft. Background Technology

[0002] Runout testing is mainly used to measure the runout error of machined shaft parts. It is generally performed by radially inspecting the shaft using a micrometer.

[0003] A search revealed that invention patent CN118533026A discloses a motor shaft runout detection device, including a frame, a first motor, a chuck, an electronic dial indicator, a moving base, and a telescopic shaft. A linear drive assembly drives the moving base. The telescopic end of the telescopic shaft is fixedly connected to the electronic dial indicator, and a limit post is connected to the telescopic end of the telescopic shaft. A stepped guide groove that mates with the stepped shaft is provided on the guide plate, and the limit post moves along the stepped guide groove. During runout detection, a display processing terminal processes the runout data, including: receiving the initial axial position, keyway data information, and runout threshold; determining the detection position based on the initial axial position, the drive data of the linear drive assembly, and the keyway data information; and deleting keyway blockage interference information from the runout data when the detection position is located in the keyway segment. This patent, through the arrangement of the moving base, telescopic shaft, limit post, and guide plate, enables runout detection of stepped shafts at multiple positions.

[0004] However, existing motor shaft runout detection equipment requires the motor shaft to be fixed in place during use. Since the motor shaft lacks radial restraint, it is prone to wobbling, which affects the detection results. Therefore, improvements are needed. Utility Model Content

[0005] The purpose of this invention is to provide a fixture for detecting runout of a motor shaft, which solves the problem that the motor shaft is prone to wobbling due to the lack of radial limiting, thus affecting the detection results.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a clamp for detecting runout of a motor shaft, comprising a base, on which a micrometer is mounted, a radial clamping mechanism is provided at the upper end of the base, a threaded shaft is mounted inside the base via bearings, a moving block is threadedly connected to the middle section of the threaded shaft, a baffle is fixedly connected to the top of the moving block, an end push block is fixedly connected to the baffle, the end of the end push block away from the baffle contacts the motor shaft, and the motor shaft contacts the micrometer, and a knob is fixedly connected to the end of the threaded shaft located outside the base.

[0007] Preferably, the bottom of the movable block is provided with ball bearings, which are flush with the inner surface of the base. The ball bearings reduce the relative friction between the movable block and the base.

[0008] Preferably, a retaining plate is slidably sleeved on the outer side of the threaded shaft, and the retaining plate contacts the outer wall of the base. A spring is sleeved on the outer side of the threaded shaft. A retaining pin is fixedly connected to the side of the retaining plate near the base, and the retaining pin is inserted into the base. A guide rod is fixedly connected to the retaining plate, and the guide rod passes through the knob and is slidably connected to the knob. A ring of grooves is formed on the outer wall of the base for the retaining pin to engage.

[0009] Preferably, one end of the spring is fixedly connected to the stop plate, and the other end of the spring is fixedly connected to the knob. By using the spring, the elastic force can be applied to the stop plate and the locking pin.

[0010] Preferably, the radial clamping mechanism includes two L-shaped plates bolted to the upper end of the base, and a pad is bolted to the vertical part of each L-shaped plate. The pad contacts the motor shaft. A bracket is fixedly connected to the upper end of the base between the two L-shaped plates. An adjusting rod is threaded to the horizontal part of the bracket, and the adjusting rod passes through the bracket. A pressure block is mounted to the end of the adjusting rod via a bearing, and the pressure block is slidably connected to the inner side of the bracket. The pressure block contacts the motor shaft. This radial clamping mechanism provides radial clamping for the motor shaft and is suitable for motor shafts of different diameters.

[0011] Preferably, a guide block is fixedly connected to the side of the pressure block, and the guide block passes through the bracket and is slidably connected to the bracket. The guide block guides the lifting and lowering of the pressure block.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. This utility model provides a radial clamping mechanism on the base, in which pads on two L-shaped plates can support the motor shaft. The lifting and lowering of the pressure block can be controlled by adjusting the threaded movement between the adjusting rod and the pressure block, thereby jointly clamping the motor shaft with the pads. This provides a good fixing effect when detecting the runout of the motor shaft and is suitable for motor shafts of different diameters, with good applicability.

[0014] 2. This utility model provides a threaded shaft mounted on a bearing within a base. A movable block is threadedly connected to the threaded shaft. A baffle and an end push block are mounted on the movable block. The end push block abuts against the end of the motor shaft. By rotating the threaded shaft, the movable block moves axially, thereby using the baffle and end push block to push the motor shaft, ensuring that the entire shaft is effectively detected, avoiding omissions, and improving the accuracy of the detection. Attached Figure Description

[0015] Figure 1 This is a perspective view of the overall structure of this utility model;

[0016] Figure 2 This utility model Figure 1 Schematic diagram of local structure Figure 1 ;

[0017] Figure 3 This utility model Figure 1 Schematic diagram of local structure Figure 2 ;

[0018] Figure 4 This utility model Figure 1 A front sectional view;

[0019] Figure 5 This utility model Figure 4 Enlarged view of point A.

[0020] In the diagram: 1. Base; 2. Micrometer; 3. Radial clamping mechanism; 4. Motor shaft; 5. Threaded shaft; 6. Moving block; 7. Baffle; 8. End push block; 9. Ball bearing; 10. Knob; 11. Baffle plate; 12. Locking pin; 13. Spring; 14. Guide rod; 31. L-shaped plate; 32. Pad; 33. Bracket; 34. Adjusting rod; 35. Pressure block; 36. Guide block. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-5 A fixture for detecting motor shaft runout includes a base 1, on which a micrometer 2 is mounted. A threaded shaft 5 is mounted inside the base 1 via bearings. A movable block 6 is threadedly connected to the middle section of the threaded shaft 5. A ball bearing 9 is located at the bottom of the movable block 6, and the ball bearing 9 contacts the inner surface of the base 1. The ball bearing 9 reduces the relative friction between the movable block 6 and the base 1. A baffle 7 is fixedly connected to the top of the movable block 6, and an end pusher 8 is fixedly connected to the baffle 7. The end of the end pusher 8 away from the baffle 7 contacts the motor shaft 4, and the motor shaft 4 contacts the micrometer 2. A knob 10 is fixedly connected to the end of the threaded shaft 5 located outside the base 1.

[0023] Please see Figures 4-5A retaining plate 11 is slidably sleeved on the outer side of the threaded shaft 5, and the retaining plate 11 contacts the outer wall of the base 1. A spring 13 is sleeved on the outer side of the threaded shaft 5. A retaining pin 12 is fixedly connected to the side of the retaining plate 11 near the base 1, and the retaining pin 12 is inserted into the base 1. A guide rod 14 is fixedly connected to the retaining plate 11, and the guide rod 14 passes through the knob 10 and is slidably connected to the knob 10. A ring of grooves is formed on the outer wall of the base 1 for the retaining pin 12 to engage. One end of the spring 13 is fixedly connected to the retaining plate 11, and the other end of the spring 13 is fixedly connected to the knob 10. Through the arrangement of the spring 13, the elastic force can be applied to the retaining plate 11 and the retaining pin 12.

[0024] Please see Figures 1-4 A radial clamping mechanism 3 is provided at the upper end of the base 1. This mechanism provides radial clamping for the motor shaft 4 and is suitable for motor shafts 4 of different diameters. The radial clamping mechanism 3 includes two L-shaped plates 31 bolted to the upper end of the base 1. Each L-shaped plate 31 has a pad 32 bolted to its vertical portion, which contacts the motor shaft 4. A bracket 33 is fixedly connected to the upper end of the base 1 between the two L-shaped plates 31. An adjusting rod 34 is threaded to the horizontal portion of the bracket 33, passing through it. A pressure block 35 is mounted to the end of the adjusting rod 34 via a bearing, slidably connected to the inner side of the bracket 33, and contacts the motor shaft 4. A guide block 36 is fixedly connected to the side of the pressure block 35, passing through and slidably connecting to the bracket 33. The guide block 36 guides the lifting and lowering of the pressure block 35.

[0025] The specific implementation process of this utility model is as follows: In use, firstly, the motor shaft 4 is placed on two pads 32, with its end abutting against the end push block 8. Then, the adjusting rod 34 is rotated. The adjusting rod 34 moves with the threaded movement of the bracket 33, causing the pressure block 35 to move down until it abuts against the motor shaft 4. At this time, the end of the micrometer 2 abuts against the motor shaft 4. Then, the guide rod 14 is pulled, and the guide rod 14 drives the baffle 11 to move, causing the locking pin 12 on the baffle 11 to separate from the base 1, thereby releasing the restriction on the threaded shaft 5. Then, the knob 10 is rotated through the guide rod 14, and the knob 10 drives the threaded shaft 5 to rotate, thereby causing the moving block 6 to move in its axial direction. The baffle 7 and the end push block 8 are used to push the motor shaft 4, so that the whole is effectively detected, avoiding omissions and improving the accuracy of detection. In addition, during the movement of the motor shaft 4, it can be manually assisted to rotate, further improving the accuracy of detection.

[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fixture for detecting runout of a motor shaft, comprising a base (1), characterized in that: A micrometer (2) is mounted on the base (1). A radial clamping mechanism (3) is provided at the upper end of the base (1). A threaded shaft (5) is mounted inside the base (1) through a bearing. A moving block (6) is connected to the middle section of the shaft of the threaded shaft (5) through a thread. A baffle (7) is fixedly connected to the top of the moving block (6). An end push block (8) is fixedly connected to the baffle (7). The end of the end push block (8) away from the baffle (7) contacts a motor shaft (4), and the motor shaft (4) contacts the micrometer (2). A knob (10) is fixedly connected to the end of the threaded shaft (5) located outside the base (1).

2. The fixture for detecting runout of a motor shaft according to claim 1, characterized in that: The bottom of the movable block (6) is provided with a ball (9), and the ball (9) is on the inner surface of the base (1).

3. The fixture for detecting runout of a motor shaft according to claim 1, characterized in that: A retaining plate (11) is slidably sleeved on the outer side of the threaded shaft (5), and the retaining plate (11) contacts the outer wall of the base (1). A spring (13) is sleeved on the outer side of the threaded shaft (5). A locking pin (12) is fixedly connected to the side of the retaining plate (11) near the base (1), and the locking pin (12) is inserted into the base (1). A guide rod (14) is fixedly connected to the retaining plate (11), and the guide rod (14) passes through the knob (10) and is slidably connected to the knob (10).

4. A fixture for detecting runout of a motor shaft according to claim 3, characterized in that: One end of the spring (13) is fixedly connected to the baffle (11), and the other end of the spring (13) is fixedly connected to the knob (10).

5. A fixture for detecting runout of a motor shaft according to claim 1, characterized in that: The radial clamping mechanism (3) includes two L-shaped plates (31) bolted to the upper end of the base (1), and each L-shaped plate (31) has a pad (32) bolted to its vertical part. The pad (32) contacts the motor shaft (4). A bracket (33) is fixedly connected to the upper end of the base (1) between the two L-shaped plates (31). An adjusting rod (34) is threaded to the horizontal part of the bracket (33), and the adjusting rod (34) passes through the bracket (33). A pressure block (35) is mounted on the end of the adjusting rod (34) through a bearing, and the pressure block (35) is slidably connected to the inner side of the bracket (33). The pressure block (35) contacts the motor shaft (4).

6. A fixture for detecting runout of a motor shaft according to claim 5, characterized in that: The side of the pressure block (35) is fixedly connected to a guide block (36), which passes through the bracket (33) and is slidably connected to the bracket (33).

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