Testing device for measuring on-load starting torque of thrust ball bearing
By designing a test device including bearing fixing seat, shaft, torque wheel, loading weight and spring dynamometer, the problem of measuring friction torque when the thrust ball bearing is stationary to start rotation is solved, and accurate load-load starting torque measurement is achieved.
Patent Information
- Application Number
- CN202422066600.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The prior art lacks an accurate measuring device for overcoming friction torque at the moment when the thrust ball bearing is stationary to the beginning of rotation.
A test device including a bearing fixing seat, a shaft, a torque wheel, a loading weight and a spring dynamometer is designed, through which the starting torque of the thrust ball bearing under a load state can be measured.
This device can accurately measure the load-loaded starting torque of the thrust ball bearing from stationary to start rotation. It has a simple structure and a reasonable range of applications.
Smart Images
Figure CN222951881U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of bearing load starting torque testing, in particular to a testing device for measuring the load starting torque of a thrust ball bearing. Background Art
[0002] Thrust ball bearings can withstand thrust loads when running at high speeds. They consist of a washer-shaped race with a raceway groove for the spherical rolling elements to roll on. This type of bearing can withstand axial loads but not radial loads.
[0003] When a thrust ball bearing is under load, the magnitude of the friction torque it takes to overcome the friction torque from stationary to the moment it starts to rotate cannot be accurately measured, and there is a lack of equipment to perform loaded starting torque tests on such bearings. Utility Model Content
[0004] In view of the defects of the prior art, the utility model provides a test device for measuring the loaded starting torque of a thrust ball bearing, which has a relatively simple and reasonable structure and can relatively accurately measure the loaded starting torque of the thrust ball bearing from stationary to the moment when it starts to rotate.
[0005] In order to achieve the above-mentioned purpose, the technical solution provided by the utility model is a test device for measuring the starting torque of a thrust ball bearing with load, which includes a bearing fixing seat, a shaft, a torque wheel, a loading weight and a spring dynamometer, the bearing fixing seat has a horizontal supporting surface for supporting the thrust ball bearing; the shaft includes a shaft body, a shoulder portion arranged on the outer diameter of the shaft body, and a connecting portion arranged on the central axis of one end of the shaft body, and the shoulder portion is against the thrust ball bearing; the torque wheel includes a wheel body with the connecting portion inserted and a limit rod vertically arranged at the center of the wheel body; the loading weight is sleeved on the limit rod and supported on the upper part of the wheel body; the spring dynamometer is connected to the wheel body and provides a pulling force along the tangential direction of the wheel body.
[0006] Furthermore, a rectangular blind hole is opened on one side surface of the wheel body, and the connecting portion includes a rectangular connecting end portion, and the rectangular blind hole matches the rectangular connecting end portion.
[0007] Furthermore, a hexagonal blind hole is formed on one side surface of the wheel body, and the connecting portion includes a hexagonal shaft end, and the hexagonal blind hole matches the hexagonal shaft end.
[0008] Furthermore, a groove is provided in the circumferential direction of the outer diameter of the wheel body, a wire body is wound inside the groove, and the wire body is connected to the spring dynamometer.
[0009] Furthermore, the groove is in an arc shape.
[0010] Furthermore, the bearing fixing seat includes a cylindrical column, a base is provided at the bottom of the cylindrical column, and a flange is provided on the inner diameter surface of the cylindrical column, and the flange is used to provide the horizontal supporting surface.
[0011] Furthermore, the width of the horizontal support surface in the diameter direction is greater than half the width of the thrust ball bearing race in the diameter direction.
[0012] During assembly, first fix the bearing holder on a horizontal plane, install the race of the thrust ball bearing inside the bearing holder, install the shaft ring of the thrust ball bearing on the shoulder of the shaft, and then place the shaft, the shaft ring assembly of the thrust ball bearing and the retainer assembly on the race of the thrust ball bearing. The upper end of the shaft is installed in the lower rectangular hole of the torque wheel, and a fixed loading weight is installed on the upper end of the torque wheel. Use a thin wire to wrap around the groove of the torque wheel, and use a spring dynamometer to slowly pull the bearing along the tangent direction of the torque wheel. When the thrust ball bearing starts to start, record the reading of the spring dynamometer at this time. The product of the measured force value and the radius of the torque wheel is the starting torque value under this load state. The average value can be measured multiple times to balance the random error of the system.
[0013] The beneficial effects of the utility model are as follows: the structure is relatively simple and reasonable, and the utility model can relatively accurately measure the loaded starting torque of the thrust ball bearing from being stationary to the moment when it starts to rotate. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of a test device for measuring the starting torque of a thrust ball bearing under load in one embodiment of the utility model;
[0015] In the figure:
[0016] 100, bearing fixing seat, 110, cylindrical column, 120, base, 130, flange, 131, horizontal support surface,
[0017] 200, shaft, 210, shaft body, 220, shaft shoulder, 230, connecting portion,
[0018] 300, torque wheel, 310, wheel body, 311, groove, 320, limit rod,
[0019] 400, load the weight,
[0020] 500, spring dynamometer, 510, wire,
[0021] 10. Thrust ball bearing. 11. Thrust ball bearing race. DETAILED DESCRIPTION
[0022] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.
[0023] See also Figure 1 , shows a schematic structural diagram of a test device for measuring the starting torque of a thrust ball bearing with load, which includes a bearing fixing seat 100, a shaft 200, a torque wheel 300, a loading weight 400 and a spring dynamometer 500. The bearing fixing seat 100 has a horizontal supporting surface 131 for supporting the thrust ball bearing 10; the shaft 200 includes a shaft body 210, a shaft shoulder 220 arranged on the outer diameter of the shaft body 210, and a connecting portion 230 arranged on the middle axis of one end of the shaft body 210, and the shaft shoulder 220 is against the thrust ball bearing 10; the torque wheel 300 includes a wheel body 310 with the connecting portion 230 inserted and a limiting rod 320 vertically arranged at the center of the wheel body 310; the loading weight 400 is sleeved on the limiting rod 320 and supported on the upper part of the wheel body 310; the spring dynamometer 500 is connected to the wheel body 310 and provides a pulling force along the tangent direction of the wheel body 310.
[0024] The above-mentioned test device for measuring the starting torque of a thrust ball bearing with load can measure the magnitude of the friction torque overcome by the thrust ball bearing from stationary to the moment of starting rotation under load. The structure is relatively simple. Loading weights 400 of corresponding weights can be stacked on the upper part of the wheel body 310 as needed. The adaptability is relatively wide. The setting of the limit rod 320 can prevent the loading weight 400 from shifting and falling to a certain extent, thereby improving the safety of the device. In addition, the wheel body 310 and the spring dynamometer 500 are provided, which can provide pulling force more conveniently and measure the friction torque overcome by the thrust ball bearing 10.
[0025] In one embodiment, a rectangular blind hole is formed on one side of the wheel body 310, and the connecting portion 230 includes a rectangular connecting end portion, and the rectangular blind hole matches the rectangular connecting end portion. This arrangement can prevent the wheel body 310 and the shaft 200 from rotating relative to each other when the spring dynamometer 500 is pulled, and the rotation torque cannot be transmitted to the shaft 200.
[0026] In another embodiment, a hexagonal blind hole is formed on one side of the wheel body, and the connecting portion includes a hexagonal shaft end, and the hexagonal blind hole matches the hexagonal shaft end. It should be noted that whether the structure is a rectangular blind hole or a hexagonal blind hole, it is to avoid relative rotation between the wheel body 310 and the shaft 200, improve the stability of the device operation, and thus improve the accuracy of the measurement data.
[0027] In one embodiment, a groove 311 is formed in the circumferential direction of the outer diameter of the wheel body 310 , and a wire body 510 is wound inside the groove 311 . The wire body 510 is connected to the spring dynamometer 500 .
[0028] In one embodiment, the groove 311 is in an arc shape.
[0029] In one embodiment, the bearing fixing seat 100 includes a cylindrical column 110 , a base 120 is disposed at the bottom of the cylindrical column 110 , and a flange 130 is disposed on the inner diameter surface of the cylindrical column 110 , and the flange 130 is used to provide a horizontal support surface 131 .
[0030] In one embodiment, the width of the horizontal support surface 131 in the diameter direction is greater than half the width of the thrust ball bearing race 11 in the diameter direction.
[0031] When detecting the starting torque of the thrust ball bearing 10 , the torque wheel 300 and the shaft 200 are first weighed, and then the number of loading weights 400 is selected. The total weight of the loading weights 400 , the torque wheel 300 and the shaft 200 is the load before starting that the thrust ball bearing 10 bears.
[0032] During assembly, the bearing holder 100 is first fixed on a horizontal plane, the race of the thrust ball bearing 10 is installed inside the bearing holder 100, the shaft race of the thrust ball bearing 10 is installed on the shaft shoulder 220 of the shaft 200, and then the shaft 200, the shaft race assembly of the thrust ball bearing 10 and the retainer assembly are placed on the race of the thrust ball bearing 10. The upper end of the shaft 200 is installed in the lower rectangular hole of the torque wheel 300, and the fixed loading weight 400 is installed on the upper end of the torque wheel 300. A thin wire is wound around the groove 311 of the torque wheel 300, and the spring dynamometer 500 is used to slowly pull the bearing along the tangent direction of the torque wheel 300. When the thrust ball bearing 10 just starts, the reading of the spring dynamometer 500 is recorded. The product of the measured force value and the torque wheel radius is the starting torque value under this load state. The average value can be measured multiple times to balance the random error of the system.
[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.
[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0036] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature. It should be noted that when an element is referred to as "fixed to" or "set on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.
Claims
1. A test device for measuring the starting torque of a thrust ball bearing under load, characterized in that: include A bearing retainer having a horizontal support surface for supporting the thrust ball bearing; A shaft, comprising a shaft body, a shaft shoulder portion arranged on the outer diameter of the shaft body, and a connecting portion of the shaft arranged at one end of the shaft body, wherein the shaft shoulder portion abuts against the thrust ball bearing; The torque wheel comprises a wheel body plugged with the connecting portion and a limiting rod vertically arranged at the center of the wheel body; A loading weight is sleeved on the limit rod and supported on the upper part of the wheel body; A spring dynamometer is connected to the wheel body and provides a pulling force along the tangential direction of the wheel body.
2. A test device for measuring the starting torque of a thrust ball bearing under load according to claim 1, characterized in that: A rectangular blind hole is formed on one side surface of the wheel body, and the connecting portion includes a rectangular connecting end portion, and the rectangular blind hole matches the rectangular connecting end portion.
3. A test device for measuring the starting torque of a thrust ball bearing under load according to claim 1, characterized in that: A hexagonal blind hole is formed on one side surface of the wheel body, and the connecting portion includes a hexagonal shaft end, and the hexagonal blind hole matches the hexagonal shaft end.
4. A test device for measuring the starting torque of a thrust ball bearing under load according to any one of claims 1 to 3, characterized in that: A groove is provided in the circumferential direction of the outer diameter of the wheel body, a wire body is wound inside the groove, and the wire body is connected to the spring dynamometer.
5. A test device for measuring the starting torque of a thrust ball bearing under load according to claim 4, characterized in that: The groove is in an arc shape.
6. A test device for measuring the starting torque of a thrust ball bearing under load according to any one of claims 1 to 3, characterized in that: The bearing fixing seat comprises a cylindrical column, a base is arranged at the bottom of the cylindrical column, a flange is arranged on the inner diameter surface of the cylindrical column, and the flange is used to provide the horizontal supporting surface.
7. A test device for measuring the starting torque of a thrust ball bearing under load according to claim 6, characterized in that: The width of the horizontal support surface in the diameter direction is greater than half the width of the thrust ball bearing race in the diameter direction.