Rolling bearing performance detection device

Abstract

The utility model discloses a rolling bearing performance detection device which comprises a fixing seat, a fixing frame, a piston box and a piston rod are fixedly connected to the fixing seat, a fixing piece used for fixing an inner ring of a rolling bearing and a driving piece used for driving an outer ring of the rolling bearing to rotate are fixedly connected to the fixing frame, liquid is contained in the piston box, and a piston plate is arranged on the liquid level. The bottom of the piston plate is connected with the piston box through a spring, the top of the piston plate is connected with a connecting rod, the connecting rod makes rolling contact with the outer ring of the rolling bearing above through a rolling piece, liquid is contained in the piston rod, a piston ball is arranged on the liquid level, and the bottom of the piston rod communicates with the bottom of the piston box. The device can amplify the surface fluctuation of the rotation of the outer ring of the rolling bearing, whether the coaxiality of the rolling bearing is qualified or not can be judged under the observation of human eyes after a qualified scale line is set, a high-precision distance measuring instrument is not needed, the detection cost is saved, and the device is relatively simple to operate; rolling bearings with different sizes can be fixed, and the universality of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rolling bearings, in particular to a rolling bearing performance detection device. Background Art

[0002] Rolling bearings are precision mechanical components that convert the sliding friction between the rotating shaft and the shaft seat into rolling friction, thereby reducing friction losses. Rolling bearings are generally composed of four parts: inner ring, outer ring, rolling element and cage. The coaxiality detection of rolling bearings is a crucial item in its performance detection. It usually refers to the degree of deviation between the center of the inner ring and the outer ring. The quality of the coaxiality of rolling bearings is usually reflected in the dimensional matching accuracy of the inner ring and the outer ring. If the coaxiality detection is not performed, the rolling bearing with poor dimensional matching accuracy between the inner ring and the outer ring is used. Frequent shaking may occur at the least, and the ball may fall off, causing damage to the bearing or even the device connected to the bearing. The existing rolling bearing coaxiality detection device usually fixes the inner ring of the rolling bearing first, and then drives its outer ring to rotate. During the rolling bearing rotation, the change in the outer ring diameter is measured and compared to determine whether the coaxiality is qualified. Since rolling bearings usually need to keep rotating at high speed, it is difficult to judge by human eyes or measure manually. Often, it can only be done with the help of precision optical elements, which increases the detection cost and makes the overall device complicated to operate. Therefore, it is necessary to design a low-cost rolling bearing coaxiality performance detection device. Utility Model Content

[0003] The utility model aims to provide a rolling bearing performance detection device, which solves the problem of high coaxiality detection cost of the existing rolling bearing performance detection device.

[0004] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0005] A rolling bearing performance detection device comprises a fixed seat, a fixed frame, a piston box and a piston rod are fixedly connected to the fixed seat, a fixing part for fixing the inner ring of the rolling bearing and a driving part for driving the outer ring of the rolling bearing to rotate are fixedly connected to the fixed frame, the piston box contains liquid and a piston plate is provided on the liquid surface, the bottom of the piston plate is connected to the piston box through a spring, the top of the piston plate is connected to a connecting rod, the connecting rod is in rolling contact with the outer ring of the rolling bearing above through a rolling part, the piston rod contains liquid and a piston ball is provided on the liquid surface, and the bottom of the piston rod is connected to the bottom of the piston box.

[0006] Furthermore, the driving member includes a motor fixed to a fixing frame and a friction wheel connected to an output end of the motor, and the friction wheel is in friction contact with an outer ring of a rolling bearing.

[0007] Furthermore, the rolling element comprises a roller frame connected to the top of the connecting rod, the roller frame is connected to a roller, and the roller is in rolling contact with the lower end of the outer ring of the rolling bearing.

[0008] Furthermore, the fixing member comprises a threaded rod fixedly connected to the fixing frame for penetrating the rolling bearing, the threaded rod has a baffle fixedly connected at one end close to the fixing frame and a detachably connected rotating cap at one end away from the fixing frame.

[0009] Furthermore, the rotating cap is a flat truncated cone, with the cone head end of the truncated cone facing the baffle, and the cone bottom is connected to a rotating handle.

[0010] Furthermore, a qualified scale line is provided on the rod wall of the piston rod.

[0011] The beneficial effects of the utility model are as follows: (1) through the piston plate with a larger contact surface with the liquid on the piston box and the piston ball with a smaller contact surface with the liquid on the piston rod, the surface fluctuation of the outer ring of the rolling bearing (with the inner ring fixed) can be amplified. After setting the qualified scale line, it is possible to judge whether the coaxiality of the rolling bearing is qualified under human eye observation, so as to determine the size matching accuracy of the inner ring and the outer ring, without the need for high-precision distance measuring instruments, saving detection costs, and the device is relatively simple to operate. (2) Rolling bearings of different sizes can be fixed for subsequent detection, which improves the versatility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] In the figure: 1. rolling bearing; 2. fixing part; 201. threaded rod; 202. baffle; 203. rotating cap; 3. driving part; 4. piston box; 5. piston plate; 6. spring; 7. connecting rod; 8. piston rod; 9. piston ball; 10. roller frame; 11. roller; 12. fixing seat; 13. fixing frame. DETAILED DESCRIPTION

[0014] The present application is further described in detail below in conjunction with the accompanying drawings. It is necessary to point out here that the following specific implementation methods are only used to further illustrate the present application and cannot be understood as limiting the scope of protection of the present application. Technical personnel in this field can make some non-essential improvements and adjustments to the present application based on the above application content.

[0015] like Figure 1As shown, a rolling bearing performance detection device comprises a fixed seat 12, a fixed frame 13, a piston box 4 and a piston rod 8 are fixedly connected to the fixed seat 12, a fixing member 2 for fixing the inner ring of the rolling bearing 1 and a driving member 3 for driving the outer ring of the rolling bearing 1 to rotate are fixedly connected to the fixed frame 13, the piston box 4 contains liquid and a piston plate 5 is provided on the liquid surface, the bottom of the piston plate 5 is connected to the piston box 4 through a spring 6, the top of the piston plate 5 is connected to a connecting rod 7, the connecting rod 7 is in rolling contact with the outer ring of the rolling bearing 1 above through a rolling member, the piston rod 8 contains liquid and a piston ball 9 is provided on the liquid surface, and the bottom of the piston rod 8 is connected to the bottom of the piston box 4.

[0016] Working principle: first, fix the inner ring of the rolling bearing 1 by the fixing part 2, and then drive the outer ring of the rolling bearing 1 to rotate by the driving part 3, the surface of the outer ring of the rolling bearing 1 will fluctuate, and the height of the piston plate 5 connected to the spring 6 will change. The piston box 4 and the piston rod 8 are in a connected state, so the height of the piston ball 9 in the piston rod 8 will change accordingly. The piston plate 5 with a larger contact surface with the liquid on the piston box 4 and the piston ball 9 with a smaller contact surface with the liquid on the piston rod 8 can amplify the surface fluctuation of the outer ring of the rolling bearing 1 (with the inner ring fixed). After setting the qualified scale line, the coaxiality of the rolling bearing can be judged under human eye observation to determine the size matching accuracy of the inner and outer rings.

[0017] Preferably, the driving member 3 includes a motor fixed to the fixing frame 13 and a friction wheel connected to the output end of the motor, the friction wheel is in friction contact with the outer ring of the rolling bearing 1, and the friction wheel can be made of, but not limited to, rubber material.

[0018] Preferably, the rolling element includes a roller frame 10 connected to the top of the connecting rod 7, and a roller 11 is connected to the roller frame 10. The roller 11 is in rolling contact with the lower end of the outer ring of the rolling bearing 1. The rolling contact between the rolling bearing 1 and the connecting rod 7 is reduced through the rolling element, so that the piston plate 5 is not easy to shake.

[0019] Preferably, the fixing member 2 includes a threaded rod 201 fixedly connected to the fixing frame 13 for passing through the rolling bearing 1, the threaded rod 201 is fixedly connected with a baffle 202 at one end close to the fixing frame 13, and a detachably connected rotating cap 203 at the end away from the fixing frame 13. After the rolling bearing 1 passes through the threaded rod 201 to the baffle 202, the rotating cap 203 is rotated close to the baffle 202 to clamp the rolling bearing 1. The rotating cap 203 can be provided with an internal thread and can be detachably connected to the threaded rod 201 by thread matching, so as to facilitate the replacement of different rolling bearings 1 to measure whether their coaxiality is qualified.

[0020] Preferably, the rotating cap 203 is a flat truncated cone, and the cone head end of the truncated cone faces the baffle 202, and the cone bottom is connected to a rotating handle. The flat truncated cone rotating cap 203 can fix rolling bearings 1 with different inner ring diameters, and can fix rolling bearings 1 of different sizes for subsequent detection, thereby improving the versatility of the device.

[0021] Preferably, a qualified scale line is provided on the rod wall of the piston rod 8. The piston rod 8 should be made of a transparent material, such as glass or transparent plastic, to facilitate observation of changes in the height of the piston ball 9. The qualified scale line can be obtained through experiments (inserting different rolling bearings multiple times, recording the upper and lower limit heights of the rolling bearings and their piston balls that can pass the instrument inspection) or calculation.

[0022] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the utility model. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model.

Claims

1. A rolling bearing performance detection device, characterized in that: The invention comprises a fixed seat (12), a fixed frame (13), a piston box (4) and a piston rod (8) fixedly connected to the fixed seat (12), a fixing member (2) for fixing the inner ring of a rolling bearing (1) and a driving member (3) for driving the outer ring of the rolling bearing (1) to rotate fixedly connected to the fixed frame (13), a liquid is contained in the piston box (4) and a piston plate (5) is provided on the liquid surface, the bottom of the piston plate (5) is connected to the piston box (4) through a spring (6), the top of the piston plate (5) is connected to a connecting rod (7), the connecting rod (7) is in rolling contact with the outer ring of the rolling bearing (1) above through a rolling member, the piston rod (8) is filled with liquid and a piston ball (9) is provided on the liquid surface, and the bottom of the piston rod (8) is connected to the bottom of the piston box (4).

2. A rolling bearing performance detection device according to claim 1, characterized in that: The driving member (3) comprises a motor fixedly connected to a fixing frame (13) and a friction wheel connected to an output end of the motor, wherein the friction wheel is in friction contact with an outer ring of a rolling bearing (1).

3. A rolling bearing performance detection device according to claim 1, characterized in that: The rolling element comprises a roller frame (10) connected to the top of the connecting rod (7), a roller (11) is connected to the roller frame (10), and the roller (11) is in rolling contact with the lower end of the outer ring of the rolling bearing (1).

4. A rolling bearing performance detection device according to claim 1, characterized in that: The fixing member (2) comprises a threaded rod (201) fixedly connected to a fixing frame (13) and used to penetrate the rolling bearing (1); the threaded rod (201) has a baffle (202) fixedly connected at one end close to the fixing frame (13) and a detachably connected rotating cap (203) at the other end away from the fixing frame (13).

5. A rolling bearing performance detection device according to claim 4, characterized in that: The rotating cap (203) is a flat truncated cone, with the cone head end of the truncated cone facing the baffle (202), and a rotating handle connected to the cone bottom.

6. A rolling bearing performance detection device according to claim 1, characterized in that: A qualified scale line is provided on the rod wall of the piston rod (8).

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