Bearing clearance detection device and detection method

Abstract

The invention discloses a bearing clearance detection device and method. The bearing clearance detection device comprises a support, a four-jaw chuck, a first screw, a second screw, a first dial indicator and a second dial indicator. The bearing clearance detection method comprises the following steps: placing a bearing on a four-jaw chuck, enabling an inner ring of the bearing to be coaxial with the four-jaw chuck, fixing the inner ring of the bearing through clamping jaws of the four-jaw chuck, and adjusting the positions of a first dial indicator and a second dial indicator to enable indicator hands of the first dial indicator and the second dial indicator to be in contact with an outer ring of the bearing; screwing a second screw rod to extrude the bearing outer ring, enabling the bearing outer ring to move along the horizontal direction relative to the bearing inner ring, and observing the change of the numerical value in the second dial indicator until the numerical value of the second dial indicator is not changed; correcting the reading of the first dial indicator to be zero, screwing the second screw rod to loosen the bearing outer ring, screwing the first screw rod to extrude the bearing outer ring, enabling the bearing outer ring to move along the opposite direction relative to the bearing inner ring, observing the change of the value of the first dial indicator until the value of the first dial indicator is not changed, and reading the value of the first dial indicator.

Description

Technical field:

[0001] The present invention relates to the technical field of bearings, and in particular to a bearing clearance detection device and a bearing clearance detection method. Background technology:

[0002] Bearing clearance, also known as bearing play, refers to the amount of clearance between the rolling element of the bearing and the inner and outer rings of the bearing, that is, when the bearing is not installed on the shaft or bearing box, one of the inner ring or outer ring is fixed, and then the unfixed side is moved radially or axially. According to the direction of movement, it can be divided into radial clearance and axial clearance. The size of the clearance will affect the vibration of the mechanical products using the bearing, the beating of the shaft, the rotation flexibility of the rolling element and other performances. Bearing manufacturers and users generally use bearing clearance testers to measure the radial clearance of the bearing, mainly using the air pressure of the cylinder to generate a force on the bearing to detect the clearance. The measured clearance indication is often not accurate enough due to changes in the air pressure of the air supply system and the different resistances between the piston and the cylinder, and thus the different forces. The detector also needs to be equipped with an air supply device, so the equipment and operating costs are relatively high.

[0003] Another commonly used method for detecting radial clearance of bearings is to place one end of a lead wire inside the bearing raceway, rotate the bearing inner ring and ball, flatten the lead wire, and measure the thickness of the lead wire. This method requires selecting multiple positions and taking multiple measurements to find the average value. The operation is cumbersome, inefficient, and results in large errors. Summary of the invention:

[0004] The first object of the present invention is to provide a bearing clearance detection device, which solves the problem of high purchase cost of existing bearing clearance detection equipment.

[0005] The second purpose of the present invention is to provide a bearing clearance detection method, which solves the problems of the currently used clearance detection methods, which are complicated operation, low efficiency and large error.

[0006] The first purpose of the present invention is implemented by the following technical scheme: a bearing clearance detection device, which includes a bracket, a supporting structure, a first screw, a second screw, a first dial indicator and a second dial indicator; the supporting structure is fixed at the center of the bottom of the bracket, and the first screw and the second screw are provided at both ends of the bracket above the supporting structure with their ends arranged opposite to each other, the first screw and the second screw are respectively penetrated and screwed on the bracket, the first dial indicator is fixed on the bracket above the first screw through a universal rod, and the second dial indicator is fixed on the bracket above the second screw through a universal rod, and the needles of the first dial indicator and the second dial indicator are arranged opposite to each other.

[0007] Preferably, the supporting structure is a four-jaw chuck, and the jaws of the four-jaw chuck are arranged upward.

[0008] Preferably, the center lines of the first screw and the second screw intersect the center line of the four-jaw chuck perpendicularly, and the center lines of the needles of the first dial indicator and the second dial indicator intersect the center line of the four-jaw chuck perpendicularly.

[0009] The second object of the present invention is implemented by the following technical solution: a bearing clearance detection method, which comprises the following steps:

[0010] (1) Place the bearing on a four-jaw chuck so that the inner ring of the bearing is coaxial with the four-jaw chuck. Fix the inner ring of the bearing with the claws of the four-jaw chuck. Adjust the positions of the first and second dial indicators with the universal rod so that the needles of the first and second dial indicators both contact the outer ring of the bearing.

[0011] (2) Tighten the second screw to squeeze the outer ring of the bearing, so that the outer ring of the bearing moves horizontally relative to the inner ring of the bearing, and observe the change of the value in the second dial indicator until the value of the second dial indicator remains unchanged;

[0012] (3) Calibrate the reading of the first dial indicator to zero, turn the second screw to loosen the outer ring of the bearing, and then turn the first screw to tighten the outer ring of the bearing, so that the outer ring of the bearing moves in the opposite direction relative to the inner ring of the bearing, and observe the change in the value of the first dial indicator until the value of the first dial indicator remains unchanged;

[0013] (4) Read the value of the first dial indicator, which is the radial clearance value of the bearing.

[0014] Advantages of the present invention: (1) The present invention uses a bearing clearance detection device to measure the radial clearance of the bearing, places the bearing on a four-jaw chuck of the bearing clearance detection device, makes the inner ring of the bearing coaxial with the four-jaw chuck, and fixes the inner ring of the bearing by the claws of the four-jaw chuck; adjusts the positions of the first dial indicator and the second dial indicator so that their needles are in contact with the outer ring of the bearing; tightens the outer ring of the bearing by screwing the second screw so that the outer ring of the bearing moves horizontally relative to the inner ring of the bearing; and judges the movement distance of the outer ring of the bearing relative to the inner ring of the bearing by observing the change of the value in the second dial indicator. When the value of the second dial indicator remains unchanged, the moving distance is the largest; at this time, calibrate the reading of the first dial indicator to zero, turn the second screw to loosen the outer ring of the bearing, and then tighten the outer ring of the bearing by turning the first screw to make the outer ring of the bearing move in the opposite direction relative to the inner ring of the bearing. By observing the changes in the value in the first dial indicator, the moving distance of the outer ring of the bearing relative to the inner ring of the bearing can be judged. When the value of the first dial indicator remains unchanged, the moving distance is the largest. At this time, read the value of the first dial indicator, which is: the radial clearance value of the bearing; the operation is simple, there is no need to measure multiple times to find the average value, the efficiency is high, and the error is small.

[0015] (2) The present invention adopts a bearing clearance detection device instead of a bearing clearance detector. The bearing clearance detection device is installed using only a bracket, a supporting structure, a first screw rod, a second screw rod, a universal rod, a first dial indicator and a second dial indicator. There is no need to use an air supply device, and the equipment and operating costs are low. Description of the drawings:

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the present invention.

[0018] Figure 2 It is a top view of the present invention.

[0019] The components in the drawings are marked as follows: bracket 1, supporting structure 2, first screw rod 3, second screw rod 4, first dial indicator 5, second dial indicator 6, bearing 7, universal rod 8. Specific implementation method:

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Embodiment 1: A bearing clearance detection device comprises a bracket 1, a support structure 2, a first screw 3, a second screw 4, a first dial indicator 5 and a second dial indicator 6, wherein the bracket 1 is used to fix the support structure 2, the first screw 3, the second screw 4, the first dial indicator 5 and the second dial indicator 6, the support structure 2 is used to place a bearing 7 and fix the inner ring of the bearing 7, the first screw 3 and the second screw 4 are used to tighten the outer ring of the bearing 7 to move the outer ring of the bearing 7, and the first dial indicator 5 and the second dial indicator 6 cooperate with each other to measure the radial clearance of the bearing 7; Structure 2 is a four-jaw chuck. A four-jaw chuck with jaws facing upward is fixed at the center of the bottom of the bracket 1. The four-jaw chuck is used to fix the inner ring of the bearing 7. A first screw 3 and a second screw 4 are arranged at both ends of the bracket 1 above the four-jaw chuck. The first screw 3 and the second screw 4 are respectively threaded and screwed on the bracket 1. The center lines of the first screw 3 and the second screw 4 intersect vertically with the center line of the four-jaw chuck. By screwing the first screw 3 and the second screw 4, the outer ring of the bearing 7 can be moved horizontally relative to the inner ring of the bearing 7. A first dial indicator 5 is fixed on the bracket 1 through a universal rod 8, and a second dial indicator 6 is fixed on the bracket 1 above the second screw rod 4 through a universal rod 8. The needles of the first dial indicator 5 and the second dial indicator 6 are arranged opposite to each other, and the center lines of the needles of the first dial indicator 5 and the second dial indicator 6 intersect vertically with the center line of the four-jaw chuck; the universal rod 8, the first dial indicator 5 and the second dial indicator 6 are all existing equipment, and the specific structures are not repeated here; when the inner ring of the bearing 7 is coaxially fixed on the four-jaw chuck, the first dial indicator 5 and the second dial indicator 6 are adjusted by the universal rod 8. Position, make the needles of the first dial indicator 5 and the second dial indicator 6 contact with the outer ring of bearing 7, screw the second screw 4 to squeeze the outer ring of bearing 7, observe the change of the value in the second dial indicator 6, until the value of the second dial indicator 6 remains unchanged, at this time, calibrate the reading of the first dial indicator 5 to zero, screw the second screw 4 to loosen the outer ring of bearing 7, then screw the first screw 3 to squeeze the outer ring of bearing 7, observe the change of the value of the first dial indicator 5, until the value of the first dial indicator 5 remains unchanged, and the radial clearance value of bearing 7 can be measured by the first dial indicator 5.

[0022] The present invention adopts a bearing clearance detection device to replace the bearing clearance detector. The bearing 7 clearance detection device is installed only with a bracket 1, a supporting structure 2, a first screw rod 3, a second screw rod 4, a universal rod 8, a first dial indicator 5 and a second dial indicator 6. No air supply device is required, and the equipment and operation costs are low. When measuring the radial clearance of the bearing 7, the bearing 7 is placed on a four-jaw chuck of the bearing clearance detection device, so that the inner ring of the bearing 7 is coaxial with the four-jaw chuck, and the inner ring of the bearing 7 is fixed by the claws of the four-jaw chuck; the positions of the first dial indicator 5 and the second dial indicator 6 are adjusted so that their needles are in contact with the outer ring of the bearing 7; the outer ring of the bearing 7 is squeezed by screwing the second screw rod 4, so that the outer ring of the bearing 7 moves horizontally relative to the inner ring of the bearing 7, and the outer ring of the bearing 7 moves horizontally relative to the inner ring of the bearing 7. Observe the change of the value in the second dial indicator 6 to determine the moving distance of the outer ring of the bearing 7 relative to the inner ring of the bearing 7. When the value of the second dial indicator 6 remains unchanged, the moving distance is the largest. At this time, calibrate the reading of the first dial indicator 5 to zero, screw the second screw 4 to loosen the outer ring of the bearing 7, and then screw the first screw 3 to tighten the outer ring of the bearing 7, so that the outer ring of the bearing 7 moves in the opposite direction relative to the inner ring of the bearing 7. By observing the change of the value in the first dial indicator 5, determine the moving distance of the outer ring of the bearing 7 relative to the inner ring of the bearing 7. When the value of the first dial indicator 5 remains unchanged, the moving distance is the largest. At this time, read the value of the first dial indicator 5, which is: the radial clearance value of the bearing 7. The operation is simple, there is no need to measure multiple times to find the average value, the efficiency is high, and the error is small.

[0023] Embodiment 2: A detection method using the bearing clearance detection device of embodiment 1 comprises the following steps:

[0024] (1) Place the bearing 7 on the four-jaw chuck so that the inner ring of the bearing 7 is coaxial with the four-jaw chuck, fix the inner ring of the bearing 7 by the claws of the four-jaw chuck, and adjust the positions of the first dial indicator 5 and the second dial indicator 6 by the universal rod 8 so that the needles of the first dial indicator 5 and the second dial indicator 6 both contact the outer ring of the bearing 7;

[0025] (2) Tighten the outer ring of the bearing 7 by screwing the second screw rod 4, so that the outer ring of the bearing 7 moves horizontally (to the left) relative to the inner ring of the bearing 7, and observe the change of the value in the second dial indicator 6 until the value of the second dial indicator 6 remains unchanged;

[0026] (3) Correct the reading of the first dial indicator 5 to zero, turn the second screw 4 to loosen the outer ring of the bearing 7, and then turn the first screw 3 to tighten the outer ring of the bearing 7, so that the outer ring of the bearing 7 moves in the opposite direction (to the right) relative to the inner ring of the bearing 7, and observe the change in the value of the first dial indicator 5 until the value of the first dial indicator 5 remains unchanged;

[0027] (4) Read the value of the first dial indicator 5, which is the radial clearance value of the bearing 7.

[0028] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A bearing clearance detection device, characterized in that: It includes a bracket, a supporting structure, a first screw, a second screw, a first dial indicator and a second dial indicator; the supporting structure is fixed at the center of the bottom of the bracket, the first screw and the second screw are arranged at both ends of the bracket above the supporting structure, and the first screw and the second screw are respectively penetrated and screwed on the bracket, the first dial indicator is fixed on the bracket above the first screw through a universal rod, and the second dial indicator is fixed on the bracket above the second screw through a universal rod, and the needles of the first dial indicator and the second dial indicator are arranged opposite to each other.

2. A bearing clearance detection device according to claim 1, characterized in that: The supporting structure is a four-jaw chuck, and the jaws of the four-jaw chuck are arranged upward.

3. A bearing clearance detection device according to claim 2, characterized in that: The center lines of the first screw and the second screw intersect the center line of the four-jaw chuck perpendicularly, and the center lines of the needles of the first dial indicator and the second dial indicator intersect the center line of the four-jaw chuck perpendicularly.

4. A detection method using a bearing clearance detection device according to any one of claims 1 to 3, characterized in that: It includes the following steps: (1) Place the bearing on a four-jaw chuck so that the inner ring of the bearing is coaxial with the four-jaw chuck. Fix the inner ring of the bearing with the claws of the four-jaw chuck. Adjust the positions of the first and second dial indicators with the universal rod so that the needles of the first and second dial indicators both contact the outer ring of the bearing. (2) Tighten the second screw to squeeze the outer ring of the bearing, so that the outer ring of the bearing moves horizontally relative to the inner ring of the bearing, and observe the change of the value in the second dial indicator until the value of the second dial indicator remains unchanged; (3) Calibrate the reading of the first dial indicator to zero, turn the second screw to loosen the outer ring of the bearing, and then turn the first screw to tighten the outer ring of the bearing, so that the outer ring of the bearing moves in the opposite direction relative to the inner ring of the bearing, and observe the change in the value of the first dial indicator until the value of the first dial indicator remains unchanged; (4) Read the value of the first dial indicator, which is the radial clearance value of the bearing.

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