Angular contact bearing axial clearance detection mechanism
By designing an axial clearance detection mechanism for angular contact bearings and employing positioning guides and assistive components, the problem of low automation in existing detection methods has been solved, achieving efficient and accurate bearing clearance detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANJING BEARING
- Filing Date
- 2025-05-16
- Publication Date
- 2026-04-17
AI Technical Summary
Existing methods for detecting axial clearance in angular contact bearings have low levels of automation, and manual operation affects detection efficiency. There is also a lack of specialized marking-based detection devices.
An axial clearance detection mechanism for angular contact bearings was designed, equipped with a positioning and guiding mechanism and an assistive component, including a limit block, a vertical rod, a rotating rod, a guide block, a slide, a slider, a base plate, a side plate, and a driver. The mechanism drives a rotating disk and a toggle block via a drive motor to achieve automated guidance and assisted operation of the measuring instrument.
It improves the accuracy and convenience of testing, enables flexible testing of axial clearance of angular contact bearings, and enhances the versatility of the testing device.
Smart Images
Figure CN224136604U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of bearing clearance detection technology, specifically to a mechanism for detecting the axial clearance of angular contact bearings. Background Technology
[0002] Angular contact ball bearings can withstand both radial and axial loads simultaneously and operate at high speeds. A larger contact angle results in a higher axial load capacity. The contact angle is the angle between the line connecting the contact points of the ball and raceway in the radial plane and the perpendicular line to the bearing axis. High-precision and high-speed bearings typically use a 15-degree contact angle. Under axial force, the contact angle increases. After production, angular contact bearings sometimes require axial clearance testing. Excessive axial clearance can lead to increased vibration and noise: Insufficient internal bearing movement and increased collisions between the rolling elements and raceways cause vibration and noise; bearing loosening: Increased clearance causes the bearing to move during operation, affecting its stability and potentially causing axial impact on the gear bearing housing, affecting gear meshing accuracy; and lubricating oil film damage: Excessive clearance makes it difficult for the lubricating oil film to form or be maintained, increasing friction and wear on the contact surfaces and accelerating bearing failure. Insufficient axial clearance... Increased friction: Insufficient clearance makes it difficult for lubricating oil to enter between rolling elements, increasing friction, raising bearing temperature, deteriorating lubricating oil, and accelerating fatigue spalling. Bearing overload: Insufficient clearance will cause the bearing to bear excessive preload, leading to local pitting of the rolling elements and raceways, eventually resulting in fatigue spalling and reducing bearing life. Therefore, axial clearance detection of angular contact bearings is particularly important. The common methods for detecting axial clearance of angular contact bearings are the feeler gauge method and the marking method. The former is simple to operate by inserting the feeler gauge, but the detection results are often inaccurate. The marking method is more accurate than the feeler gauge method.
[0003] However, existing methods for detecting the axial clearance of angular contact bearings using the marking method have the following problems: During the inspection, personnel typically need to hold the measuring instrument and bring the gauge head into contact with the bearing, applying force manually to achieve the detection. This manual operation method has low automation and affects inspection efficiency. There is a lack of a dedicated device for detecting the axial clearance of angular contact bearings using the marking method. Therefore, a corresponding technical solution needs to be designed to address these technical problems. Utility Model Content
[0004] The purpose of this invention is to provide an axial clearance detection mechanism for angular contact bearings, which solves the technical problem that the detection process generally requires the inspector to hold the measuring instrument and make the instrument head contact the bearing, and to achieve the detection purpose by manually applying force. This manual operation method has a low degree of automation and affects the efficiency of the detection. There is a lack of a device that specifically uses the marking method to detect the axial clearance of angular contact bearings.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an axial clearance detection mechanism for angular contact bearings, comprising a chassis and a measuring instrument mounted on the chassis. The chassis is equipped with a positioning and guiding mechanism, which includes a limiting block, a vertical rod, a rotating rod, and a guide block. The limiting block is fixed to the chassis, the vertical rod is vertically mounted on the limiting block, one end of the rotating rod is rotatably connected to the vertical rod, and the other end extends to one side of the measuring instrument. The guide block is mounted on the lower end of the rotating rod and has a guide opening in the middle. The measuring instrument's head passes through the guide opening. The upper surface of the disc has a sliding groove and the side has a moving groove. The sliding groove and the moving groove are connected. An assist component is slidably disposed in the sliding groove. The assist component includes a slider, a base plate, a side plate and a driver. The slider is slidably disposed in the sliding groove and a screw is fixed on one side. The screw is slidably disposed in the moving groove. A limit nut is threaded on the screw and abuts against the side of the chassis. The base plate is fixed on the slider and one side is connected to the side plate. The bottom of the measuring instrument is slidably disposed on the base plate. The driver is mounted on the side plate and is used in conjunction with the measuring instrument.
[0006] In a preferred embodiment of this utility model, the limiting block includes a fixing block and two sets of insert rods threaded through the fixing block, with a contact ball fixed to the inner end of each insert rod.
[0007] In a preferred embodiment of this invention, the contact ball has a smooth spherical structure and contacts the outer ring of the bearing to be tested.
[0008] In a preferred embodiment of this utility model, the side plate is composed of two sets of symmetrically arranged arc-shaped plates, and an installation cavity is formed between the two sets of arc-shaped plates.
[0009] In a preferred embodiment of this utility model, the driver includes a drive motor fixed to the upper end of a set of arc-shaped plates and a rotating disk installed at the power output end of the drive motor. The rotating disk is located in the mounting cavity, and an actuating block is fixed to the edge of the rotating disk. The actuating block has a fan-shaped structure and one end is narrower than the other end. The actuating block is in contact with the measuring instrument.
[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0011] 1. This utility model improves the structure of the existing axial clearance marking and testing device for angular contact bearings. The marking and testing device is equipped with a positioning and guiding mechanism and an assist component, which can realize the horizontal guidance and assistance of the measuring instrument, thereby ensuring the accuracy and convenience of axial clearance testing of angular contact bearings.
[0012] 2. The angular contact bearing axial clearance marking and testing device designed in this utility model can flexibly adjust the position of the testing table according to the bearing specifications, thereby improving the versatility of the testing device. Attached Figure Description
[0013] Figure 1 This is an overall structural diagram of the present invention;
[0014] Figure 2 This is a structural diagram of the limiting block described in this utility model;
[0015] Figure 3 This is a structural diagram of the driver described in this utility model.
[0016] In the diagram: 1. Chassis; 2. Measuring gauge; 3. Limiting block; 4. Upright rod; 5. Rotating rod; 6. Guide block; 7. Guide opening; 8. Slide groove; 9. Moving groove; 10. Sliding block; 11. Base plate; 12. Side plate; 13. Driver; 14. Screw; 15. Limiting nut; 16. Fixing block; 17. Insert rod; 18. Contact ball; 19. Arc plate; 20. Mounting cavity; 21. Drive motor; 22. Rotating disk; 23. Actuating block. Detailed Implementation
[0017] 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.
[0018] Please see Figure 1-3This utility model provides a technical solution: an axial clearance detection mechanism for angular contact bearings, including a chassis 1 and a measuring gauge 2 mounted on the chassis 1. The measuring gauge 2 is a commercially available gauge for measuring the axial clearance of angular contact bearings. A positioning and guiding mechanism is provided on the chassis 1, comprising a limiting block 3, a vertical rod 4, a rotating rod 5, and a guide block 6. The limiting block 3 is fixed to the chassis 1, the vertical rod 4 is vertically mounted on the limiting block 3, one end of the rotating rod 5 is rotatably connected to the vertical rod 4, and the other end extends to one side of the measuring gauge 2. The guide block 6 is mounted on the lower end of the rotating rod 5 and has a guide opening 7 in the middle, through which the gauge head of the measuring gauge 2 passes. The upper surface of the chassis 1 is provided with a sliding groove 8 and the side is provided with a moving groove 9. The sliding groove 8 and the moving groove 9 are connected. An assist component is slidably arranged in the sliding groove 8. The assist component includes a slider 10, a base plate 11, a side plate 12 and an actuator 13. The slider 10 is slidably arranged in the sliding groove 8 and a screw 14 is fixed on one side. The screw 14 is slidably arranged in the moving groove 9. A limit nut 15 is threaded on the screw 14. The limit nut 15 abuts against the side of the chassis 1. The base plate 11 is fixed on the slider 10 and one side is connected to the side plate 12. The bottom of the measuring instrument 2 is slidably arranged on the base plate 11. The actuator 13 is installed on the side plate 12 and is used in conjunction with the measuring instrument 2.
[0019] Further improvements, such as Figure 2 As shown, the limiting block 3 includes a fixing block 16 and two sets of insert rods 17 threaded through the fixing block 16. The inner end of the insert rod 17 is fixed with a contact ball 18, which facilitates the position adjustment of the contact ball 18 and thus improves the contact limiting effect.
[0020] Further improvements, such as Figure 2 As shown, the contact ball 18 has a smooth spherical structure and contacts the outer ring of the bearing to be tested. Since the outer ring of the bearing has an arc-shaped structure, by adjusting the position of the contact ball 18, it can make better contact with the outer ring of the bearing and achieve the purpose of limiting the position.
[0021] Further improvements, such as Figure 3 As shown, the side plate 12 is composed of two sets of symmetrically arranged arc-shaped plates 19, and a mounting cavity 20 is formed between the two sets of arc-shaped plates 19 to facilitate the installation of the driver 13.
[0022] Specifically, the driver 13 includes a drive motor 21 fixed to the upper end of a set of arc-shaped plates 19 and a rotating disk 22 installed at the power output end of the drive motor 21. The rotating disk 22 is located in the mounting cavity 20. An actuating block 23 is fixed to the edge of the rotating disk 22. The actuating block 23 has a fan-shaped structure and one end is narrower than the other end. The actuating block 23 is in contact with the measuring instrument 2. The drive motor 21 drives the rotating disk 22 to rotate. During the rotation of the rotating disk 22, the actuating block 23 rotates. During the rotation of the actuating block 23, it acts on the measuring instrument 2, so that the meter head of the measuring instrument 2 acts on the inner ring of the bearing to be tested, thereby achieving the purpose of measurement.
[0023] In use: When it is necessary to test the axial clearance of an angular contact bearing, place the bearing to be tested horizontally on the chassis 1, and move the outer ring of the bearing to one side of the limiting block 3. Adjust the position of the contact ball 18 by turning the screw 14 to better contact the outer ring of the bearing and achieve the purpose of outer limiting. Then, the operator moves the assist component and the measuring instrument 2 synchronously, so that the instrument head passes through the guide port 7 and contacts the inner ring of the bearing. At this time, the position of the assist component is positioned. Then, the drive motor 21 drives the rotating disk 22 to rotate. During the rotation of the rotating disk 22, the actuating block 23 rotates. During the rotation of the actuating block 23, the actuating block 23 acts on the measuring instrument 2, so that the instrument head of the measuring instrument 2 acts on the inner ring of the bearing to be tested, and the measurement purpose is achieved.
[0024] In the description of this utility model, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "other end", "upper", "side", "top", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0025] Furthermore, the terms "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," "third," or "fourth" may explicitly or implicitly include at least one of those features.
[0026] In this utility model, unless otherwise explicitly specified and limited, the terms "installation", "setting", "connection", "fixing", "screw connection", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0027] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. A mechanism for detecting axial play of an angular contact bearing, comprising a base (1) and a measuring scale (2) arranged on the base (1), characterized in that: The chassis (1) is equipped with a positioning and guiding mechanism, which includes a limiting block (3), a vertical rod (4), a rotating rod (5), and a guide block (6). The limiting block (3) is fixed on the chassis (1), and the vertical rod (4) is vertically installed on the limiting block (3). One end of the rotating rod (5) is rotatably connected to the vertical rod (4), and the other end extends to one side of the measuring instrument (2). The guide block (6) is installed at the lower end of the rotating rod (5) and has a guide opening (7) in the middle. The meter head of the measuring instrument (2) passes through the guide opening (7). The upper surface of the chassis (1) has a sliding groove (8), and the side has a moving groove (9). The sliding groove (8) and the moving groove (9) are connected. An assisting component is slidably disposed in the groove (8). The assisting component includes a slider (10), a base plate (11), a side plate (12), and a driver (13). The slider (10) is slidably disposed in the groove (8) and a screw (14) is fixed on one side. The screw (14) is slidably disposed in the moving groove (9). A limit nut (15) is threaded on the screw (14). The limit nut (15) abuts against the side of the chassis (1). The base plate (11) is fixed on the slider (10) and one side is connected to the side plate (12). The bottom of the measuring instrument (2) is slidably disposed on the base plate (11). The driver (13) is mounted on the side plate (12) and is used in conjunction with the measuring instrument (2).
2. An angular contact bearing axial clearance detection mechanism according to claim 1, characterized in that: The limiting block (3) includes a fixing block (16) and two sets of insert rods (17) threaded through the fixing block (16), with a contact ball (18) fixed at the inner end of the insert rod (17).
3. An angular contact bearing axial clearance detection mechanism according to claim 2, wherein: The contact ball (18) has a smooth spherical structure and contacts the outer ring of the bearing to be tested.
4. An angular contact bearing axial clearance detection mechanism according to claim 1, characterized in that: The side plate (12) is composed of two sets of symmetrically arranged arc-shaped plates (19), and an installation cavity (20) is formed between the two sets of arc-shaped plates (19).
5. An angular contact bearing axial clearance detection mechanism according to claim 4, characterised in that: The driver (13) includes a drive motor (21) fixed to the upper end of a set of arc plates (19) and a rotating disk (22) installed at the power output end of the drive motor (21). The rotating disk (22) is located in the mounting cavity (20). A toggle block (23) is fixed to the edge of the rotating disk (22). The toggle block (23) has a fan-shaped structure and one end is narrower than the other end. The toggle block (23) is in contact with the measuring instrument (2).