Bearing contact angle measuring instrument

Abstract

The invention relates to the technical field of bearing manufacturing, and discloses a bearing contact angle measuring instrument which comprises a detection box, a movable groove is formed in the surface of the detection box, and a telescopic column is fixedly connected to the bottom of the inner wall of the movable groove; the measuring mechanism comprises a detector, the detector is fixedly connected with the top of the telescopic column and slidably connected with the surface of the movable groove, one end of the detector is fixedly connected with a mounting pipe, the end, away from the detector, of the mounting pipe is fixedly connected with a transmitting pipe, the adjusting assembly comprises a connecting ring, and the connecting ring is fixedly connected with the two sides of the transmitting pipe. The surface of the connecting ring is rotationally connected with a moving arm. By arranging the measuring mechanism, a detection light source is generated in a detection disc, detection light waves are emitted outwards through a plurality of spraying cavities in the surface of the measuring disc, the interior of a bearing raceway can be detected through the light waves emitted by the measuring disc, and the contact area of a rolling body and the raceway can be measured; the problem that a light wave detection instrument cannot accurately position a contact point is avoided.

Description

Technical Field

[0001] This invention relates to the field of bearing manufacturing technology, specifically a bearing contact angle measuring instrument. Background Technology

[0002] The contact angle is a crucial structural parameter of angular contact ball bearings, and it is a key indicator of their performance, determining their axial and radial load-bearing capacity. Extensive theoretical research and experimental studies have demonstrated that for precision spindle angular contact ball bearings, especially mating bearings, the magnitude and consistency of their contact angle directly impact the stiffness, rotational accuracy, and service life of the entire shaft system.

[0003] Patent application CN201510189585.0 discloses a bearing contact angle measuring instrument, which mainly consists of a loading mechanism, a positioning drive mechanism, and a measurement and control section. The loading mechanism applies a load to the inner ring of the bearing under test, the positioning drive mechanism directly drives the outer ring of the bearing under test, an industrial computer controls the outer ring speed, a laser displacement sensor measures the cage speed, and finally the bearing contact angle is calculated based on the relationship between the outer ring speed, the cage speed, and the bearing contact angle.

[0004] However, this patent also has the following shortcomings: when there is oil, scratches, or oxide scale on the current bearing raceway, personnel need to clean the bearing raceway regularly. In addition, the contact area between the rolling elements and the raceway is extremely small, which makes it impossible for optical instruments to accurately locate the contact point. In response to this situation, a bearing contact angle measuring instrument is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide a bearing contact angle measuring instrument to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a bearing contact angle measuring instrument, including a detection box, wherein a movable groove is formed on the surface of the detection box, a telescopic column is fixedly connected to the bottom of the inner wall of the movable groove, and a measuring mechanism is provided on the top of the telescopic column;

[0007] The measuring mechanism includes:

[0008] The detector is fixedly connected to the top of the telescopic column and slidably connected to the surface of the movable groove. One end of the detector is fixedly connected to an installation tube, and the end of the installation tube away from the detector is fixedly connected to a transmitting tube. Adjustment components are provided on both sides of the transmitting tube. By activating the telescopic switch of the telescopic column, the telescopic column slides upward and extends, thereby driving the detector to slide up and down inside the movable groove.

[0009] The adjustment component includes:

[0010] A connecting ring is fixedly connected to both sides of the transmitting tube. A movable arm is rotatably connected to the surface of the connecting ring. By activating the detector switch, the transmitting tube emits detection light waves to detect the bearing contact surface.

[0011] According to the above technical solution, the adjustment component further includes a push rod, one end of which is fixedly connected to the inner wall of the moving arm, and a detection disk is fixedly connected to the end of the push rod away from the moving arm. A mounting column is fixedly connected to the inner wall of the detection disk, and a measuring disk is fixedly connected to the end of the mounting column away from the detection disk. A support column is fixedly connected to the bottom of the inner wall of the detection box, and a push frame is slidably connected to the surface of the support column. An impactor is fixedly connected to the end of the detection box away from the detector. A placement mechanism is provided at the top of the support column, and a mounting mechanism is provided at the bottom of the impactor. The moving arm is driven to rotate inside the connecting ring by the controller inside the mounting tube, so that the moving arm drives the detection disk to rotate downward to the surface of the bearing.

[0012] According to the above technical solution, the placement mechanism includes a placement plate, which is fixedly connected to the top of the support column. Pushers are fixedly connected to both sides of the placement plate. The end of the pusher away from the support column is fixedly connected to the bottom of the placement plate. A movable frame is slidably connected to the inner wall of the placement plate. A clamping assembly is provided at one end of the movable frame. By rotating the pusher, the pusher causes the clamping cover to rotate on the inner wall of the fixed ring to the bottom of the movable frame.

[0013] According to the above technical solution, the clamping assembly includes a fixed ring, which is fixedly connected to one end of the movable frame. Clamping covers are rotatably connected to both sides of the inner wall of the fixed ring via a rotating shaft. A buffer pad is slidably connected to the inner wall of the clamping cover. A push rod is rotatably connected to a slot on the surface of the fixed ring. A telescopic cavity is fixedly connected to a slot on the surface of the clamping cover. A push pad is slidably connected to the inner wall of the telescopic cavity. A plug-in rod is fixedly connected to the bottom of the clamping cover. The plug-in rod is inserted into a slot on the surface of the movable frame, thereby fixing the clamping cover to the surface of the fixed ring.

[0014] According to the above technical solution, the push rod is fixedly connected to the surface of the clamping cover through one end inside the fixed ring, the inner wall of the movable frame is provided with an insertion groove, the surface of the buffer pad is provided with an adsorption hole, and the switch of the telescopic cavity is activated, so that the telescopic cavity extends and retracts to the outside and drives the push pad to push the bearing.

[0015] According to the above technical solution, the installation mechanism includes an installation plate, which is fixedly connected to the bottom of the impactor. A support box is fixedly connected to the bottom of the installation plate, and a movable rod is slidably connected to the bottom of the support box. A cleaning component is provided at the end of the movable rod away from the support box. The control box can be moved downward to the inside of the bearing by the movable rod.

[0016] According to the above technical solution, the cleaning component includes a control box, which is fixedly connected to one end of the movable rod. Rotating cavities are fixedly connected to both sides of the control box. A swing arm is slidably connected to the inner wall of the rotating cavity. A folded membrane is fixedly connected to the surface of the swing arm. A cleaning ring is fixedly connected to the surface of the swing arm. A storage box is fixedly connected to one side of the folded membrane. By activating the control box switch, the swing arm inside the rotating cavity is driven to slide up and down.

[0017] According to the above technical solution, the cleaning ring has a cleaning groove on its surface, the cleaning ring is made of stretchable silicone material, the folded membrane has elasticity, the folded membrane has a receiving groove on its surface, and the storage cavity has a cavity inside. When the swing arm slides, it will drive the folded membrane to stretch inward and outward.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. This invention, by setting up a placement mechanism, allows the bearing to be pushed to the surface of the buffer pad inside the clamping cover. The buffer pad then buffers the pressure exerted by the bearing. Simultaneously, the compression of the buffer pad surface creates a pressure difference between the inside and outside of the adsorption holes on the buffer pad surface, thereby generating suction to adsorb the bearing onto the buffer pad surface. By setting up this mechanism, bearings of different sizes can be clamped and fixed, eliminating the need for personnel to adjust the clamping tools and improving the efficiency of measuring the bearing contact angle.

[0020] 2. This invention, through the installation mechanism, allows the control box to be moved downwards into the bearing via a movable rod. By activating the control box switch, the swing arm inside the rotating cavity slides up and down. As the swing arm slides, it causes the folded membrane to extend and retract inwards and outwards. During the extension and retraction of the swing arm, the cleaning ring scrapes away the oil stains inside the bearing raceway, eliminating the need for regular manual cleaning and facilitating automatic cleaning of the oil stains inside the bearing raceway.

[0021] 3. This invention, by setting up a measuring mechanism, allows the measuring disk to extend into the bearing raceway when the push rod moves the detection disk to the bearing surface inside the clamping cover. By activating the light source switch of the detection disk, a detection light source is generated inside the detection disk and emitted outward through multiple ejection chambers on the surface of the measuring disk. The light waves emitted by the measuring disk can detect the interior of the bearing raceway. By setting up this mechanism, the contact area between the rolling element and the raceway can be measured, avoiding the inability of light wave detection instruments to accurately locate the contact point.

[0022] 4. This invention, by setting up a cleaning component, allows the folded membrane to come into contact with the oil stains inside the bearing raceway. The folded membrane cleans the oil stains inside the bearing raceway, and the oil stains are absorbed into the storage box through the receiving grooves on the surface of the folded membrane. The swing arm drives the folded membrane to slide and extend, thereby adjusting the cleaning range inside the bearing raceway. By setting up this component, since the inner diameter area of ​​the bearing raceway is different for different models, the oil stains inside the bearing raceway can be effectively cleaned, thereby improving the cleaning efficiency of the oil stains inside the bearing raceway. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the internal cross-sectional structure of the detection box of the present invention;

[0025] Figure 3 This is a perspective view of the placement mechanism of the present invention;

[0026] Figure 4 This is a perspective view of the clamping component of the present invention;

[0027] Figure 5 This is a perspective view of the mounting mechanism of the present invention;

[0028] Figure 6 This is a perspective view of the cleaning component of the present invention;

[0029] Figure 7 This is a perspective view of the measuring mechanism of the present invention;

[0030] Figure 8 This is a perspective view of the adjustment component of the present invention.

[0031] In the diagram: 1. Detection box; 2. Support column; 3. Push frame; 4. Movable slot; 5. Impactor; 6. Telescopic column; 7. Placement mechanism; 701. Placement plate; 702. Pusher; 703. Movable frame; 704. Clamping assembly; 7041. Fixing ring; 7042. Clamping cover; 7043. Buffer pad; 7044. Push rod; 7045. Telescopic cavity; 7046. Push pad; 7047. Connecting rod; 8. Installation mechanism; 801. Installation plate; 802. Support box; 803. Movable rod; 804. Cleaning assembly; 8041. Control box; 8042. Rotating cavity; 8043. Swing arm; 8044. Folded membrane; 8045. Cleaning ring; 8046. Storage box; 9. Measuring mechanism; 901. Detector; 902. Mounting tube; 903. Transmitting tube; 904. Adjustment assembly; 9041. Connecting ring; 9042. Moving arm; 9043. Push rod; 9044. Detection plate; 9045. Mounting column; 9046. Measuring plate. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0034] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," 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 communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0035] Example 1: See Figures 1-4 The present invention provides a technical solution: a bearing contact angle measuring instrument, including a detection box 1, a movable groove 4 is provided on the surface of the detection box 1, a telescopic column 6 is fixedly connected to the bottom of the inner wall of the movable groove 4, and a measuring mechanism 9 is provided on the top of the telescopic column 6;

[0036] The placement mechanism 7 includes a placement plate 701, which is fixedly connected to the top of the support column 2. Pushers 702 are fixedly connected to both sides of the placement plate 701. The end of the pusher 3 away from the support column 2 is fixedly connected to the bottom of the placement plate 701. A movable frame 703 is slidably connected to the inner wall of the placement plate 701. A clamping assembly 704 is provided at one end of the movable frame 703. The bearing to be measured is first placed inside the clamping cover 7042. By rotating the pusher 7044, the pusher 7044 drives the clamping cover 7042 to rotate on the inner wall of the fixed ring 7041 to the bottom of the movable frame 703. The clamping cover 7042 is fixed to the surface of the fixed ring 7041 by inserting the insertion rod 7047 into the insertion groove on the surface of the movable frame 703.

[0037] The clamping assembly 704 includes a fixing ring 7041, which is fixedly connected to one end of the movable frame 703. The inner walls of the fixing ring 7041 are rotatably connected to the clamping cover 7042 via a rotating shaft. The inner wall of the clamping cover 7042 is slidably connected to the buffer pad 7043. The surface slot of the fixing ring 7041 is rotatably connected to the push rod 7044. The surface slot of the clamping cover 7042 is fixedly connected to the telescopic cavity 7045. The inner wall of the telescopic cavity 7045 is slidably connected to the push pad 7046. The bottom of the clamping cover 7042 is fixedly connected to the insertion rod 7047. When the telescopic cavity 7045 is activated, it extends and retracts outward, causing the push pad 7046 to push the bearing. When the bearing is pushed inside the clamping cover 7042 to the surface of the buffer pad 7043, the pressure brought by the bearing is buffered by the buffer pad 7043.

[0038] Currently, before measuring a bearing using a bearing contact angle measuring instrument, the bearing needs to be fixed. Due to the differences in bearing models, manual adjustment of the clamping tools for different bearing models is required, which reduces the bearing measurement efficiency. Therefore, a clamping assembly 704 is needed.

[0039] The push rod 7044 is fixedly connected to the surface of the clamping cover 7042 through one end inside the fixing ring 7041. The inner wall of the moving frame 703 is provided with an insertion groove, and the surface of the buffer pad 7043 is provided with adsorption holes. At the same time, due to the compression of the surface of the buffer pad 7043, a pressure difference is formed between the inside and outside of the adsorption holes on the surface of the buffer pad 7043, thereby generating suction to adsorb the bearing onto the surface of the buffer pad 7043. Bearings of different sizes can be clamped and fixed, so that personnel do not need to adjust the clamping tools afterward, thus improving the efficiency of measuring the bearing contact angle.

[0040] Example 2: Based on Example 1, please refer to the following... Figures 5-6The present invention provides a technical solution: the installation mechanism 8 includes an installation plate 801, which is fixedly connected to the bottom of the impactor 5. A support box 802 is fixedly connected to the bottom of the installation plate 801. A movable rod 803 is slidably connected to the bottom of the support box 802. A cleaning component 804 is provided at the end of the movable rod 803 away from the support box 802. Before measuring the bearing, the push rod 7044 is rotated to drive the clamping cover 7042 to rotate upward on the inner wall of the fixing ring 7041, so that the bearing inside the clamping cover 7042 is facing the impactor 5 at the top. Then, by activating the impactor 5 switch, the movable rod 803 is driven to slide and extend outward.

[0041] The cleaning assembly 804 includes a control box 8041, which is fixedly connected to one end of a movable rod 803. Rotating cavities 8042 are fixedly connected to both sides of the control box 8041. A swing arm 8043 is slidably connected to the inner wall of the rotating cavity 8042. A folded membrane 8044 is fixedly connected to the surface of the swing arm 8043, and a cleaning ring 8045 is fixedly connected to the surface of the swing arm 8043. A storage box 8046 is fixedly connected to one side of the folded membrane 8044. The movable rod 803 can move the control box 8041 downwards into the bearing. By activating the switch of the control box 8041, the swing arm 8043 inside the rotating cavity 8042 slides up and down. When the swing arm 8043 slides, it causes the folded membrane 8044 to extend and retract inwards and outwards. During the up-and-down extension and retraction of the swing arm 8043, the cleaning ring 8045 scrapes away the oil stains inside the bearing raceway, eliminating the need for regular manual cleaning and facilitating automatic cleaning of the oil stains inside the bearing raceway.

[0042] Currently, there is oil contamination inside the bearing raceway. Since the inner diameter area of ​​the raceway varies for different bearing models, the cleaning range inside the bearing raceway needs to be effectively adjusted during cleaning. Therefore, a cleaning component 804 is required.

[0043] The cleaning ring 8045 has cleaning grooves on its surface and is made of stretchable silicone material. The folded membrane 8044 is elastic and has receiving grooves on its surface. The storage chamber has a cavity inside. The folded membrane 8044 comes into contact with the oil stains inside the bearing raceway and can clean the oil stains inside the bearing raceway. The receiving grooves on the surface of the folded membrane 8044 absorb the oil stains into the storage box 8046. The swing arm 8043 drives the folded membrane 8044 to slide and extend, thereby adjusting the cleaning range inside the bearing raceway. Since the inner diameter area of ​​the bearing raceway is different for different models, the oil stains inside the bearing raceway can be effectively cleaned, thereby improving the cleaning efficiency of the oil stains inside the bearing raceway.

[0044] Example 3: Based on Example 2, please refer to the following... Figures 7-8 The present invention provides a technical solution: the measuring mechanism 9 includes a detector 901, which is fixedly connected to the top of the telescopic column 6 and slidably connected to the surface of the movable groove 4. One end of the detector 901 is fixedly connected to an installation tube 902, and the end of the installation tube 902 away from the detector 901 is fixedly connected to an emission tube 903. Adjustment components 904 are provided on both sides of the emission tube 903. By activating the telescopic switch of the telescopic column 6, the telescopic column 6 slides upward and extends, thereby driving the detector 901 to slide up and down inside the movable groove 4 to match the detection height of the bearing inside the placement plate 701. By activating the switch of the detector 901, the emission tube 903 emits detection light waves to the outside to detect the bearing contact surface.

[0045] The adjustment assembly 904 includes a connecting ring 9041, which is fixedly connected to both sides of the transmitting tube 903. A movable arm 9042 is rotatably connected to the surface of the connecting ring 9041. When it is necessary to measure the inside of the bearing raceway, the movable arm 9042 is driven to rotate inside the connecting ring 9041 by the controller inside the mounting tube 902. This causes the movable arm 9042 to drive the detection disk 9044 to rotate downward to the surface of the bearing. The push rod 9043 is driven to slide and extend outward by the controller inside the mounting tube 902. When the push rod 9043 drives the detection disk 9044 to move to the bearing surface inside the clamping cover 7042, the measuring disk 9046 extends and retracts into the bearing raceway.

[0046] The contact area between the rolling elements and the raceway of a bearing is extremely small, which makes it impossible for optical instruments to accurately locate the contact point. This increases the difficulty for optical testing instruments to inspect the inside of the bearing, so an adjustment component 904 is required.

[0047] The adjustment assembly 904 also includes a push rod 9043, one end of which is fixedly connected to the inner wall of the moving arm 9042. A detection disk 9044 is fixedly connected to the end of the push rod 9043 away from the moving arm 9042. A mounting column 9045 is fixedly connected to the inner wall of the detection disk 9044. A measuring disk 9046 is fixedly connected to the end of the mounting column 9045 away from the detection disk 9044. A support column 2 is fixedly connected to the bottom of the inner wall of the detection box 1. A push frame 3 is slidably connected to the surface of the support column 2. The detection box 1 is located away from the detector 9042. One end of 01 is fixedly connected to an impactor 5. The top of the support column 2 is provided with a placement mechanism 7, and the bottom of the impactor 5 is provided with an installation mechanism 8. By activating the light source switch of the detection disk 9044, a detection light source is generated inside the detection disk 9044 and emitted outward through multiple ejection cavities on the surface of the measuring disk 9046. The light waves emitted by the measuring disk 9046 can detect the inside of the bearing raceway and measure the contact area between the rolling elements and the raceway, thus avoiding the inability of the light wave detection instrument to accurately locate the contact point.

[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0049] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention 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 the present invention should be included within the protection scope of the present invention.

Claims

1. A bearing contact angle measuring instrument, comprising a testing box (1), wherein a movable groove (4) is formed on the surface of the testing box (1), and a telescopic column (6) is fixedly connected to the bottom of the inner wall of the movable groove (4), characterized in that, A measuring mechanism (9) is provided on the top of the telescopic column (6). The measuring mechanism (9) includes: The detector (901) is fixedly connected to the top of the telescopic column (6), and the detector (901) is slidably connected to the surface of the movable groove (4). One end of the detector (901) is fixedly connected to the mounting tube (902), and the end of the mounting tube (902) away from the detector (901) is fixedly connected to the transmitting tube (903). Adjustment components (904) are provided on both sides of the transmitting tube (903). The telescopic column (6) is used to push the detector (901) upward. The adjustment component (904) includes: A connecting ring (9041) is fixedly connected to both sides of the transmitting tube (903). A movable arm (9042) is rotatably connected to the surface of the connecting ring (9041). The connecting ring (9041) is used to drive the movable arm (9042) to rotate.

2. The bearing contact angle measuring instrument according to claim 1, characterized in that: The adjustment assembly (904) also includes a push rod (9043), one end of which is fixedly connected to the inner wall of the moving arm (9042). The end of the push rod (9043) away from the moving arm (9042) is fixedly connected to a detection disk (9044). The inner wall of the detection disk (9044) is fixedly connected to a mounting column (9045). The end of the mounting column (9045) away from the detection disk (9044) is fixedly connected to a measuring disk (9046). The bottom of the inner wall of the detection box (1) is fixedly connected to a support column (2). The surface of the support column (2) is slidably connected to a push frame (3). The end of the detection box (1) away from the detector (901) is fixedly connected to an impactor (5). The top of the support column (2) is provided with a placement mechanism (7). The bottom of the impactor (5) is provided with a mounting mechanism (8). The push rod (9043) is used to push the detection disk (9044).

3. The bearing contact angle measuring instrument according to claim 2, characterized in that: The placement mechanism (7) includes a placement plate (701), which is fixedly connected to the top of the support column (2). Pushers (702) are fixedly connected to both sides of the placement plate (701). The end of the pusher (3) away from the support column (2) is fixedly connected to the bottom of the placement plate (701). A movable frame (703) is slidably connected to the inner wall of the placement plate (701). A clamping assembly (704) is provided at one end of the movable frame (703). The placement plate (701) is used for the movable frame (703) to slide on its inner wall.

4. The bearing contact angle measuring instrument according to claim 3, characterized in that: The clamping assembly (704) includes a fixing ring (7041), which is fixedly connected to one end of the movable frame (703). The inner walls of the fixing ring (7041) are rotatably connected to clamping covers (7042) via rotating shafts. The inner walls of the clamping covers (7042) are slidably connected to buffer pads (7043). A push rod (7044) is rotatably connected to a slot on the surface of the fixing ring (7041). A telescopic cavity (7045) is fixedly connected to a slot on the surface of the clamping cover (7042). A push pad (7046) is slidably connected to the inner wall of the telescopic cavity (7045). A plug-in rod (7047) is fixedly connected to the bottom of the clamping cover (7042). The push pad (7046) is used to push the bearing.

5. The bearing contact angle measuring instrument according to claim 4, characterized in that: The push rod (7044) is fixedly connected to the surface of the clamping cover (7042) through one end inside the fixing ring (7041). The inner wall of the moving frame (703) is provided with an insertion groove. The surface of the buffer pad (7043) is provided with an adsorption hole. The buffer pad (7043) is used to contact the bearing.

6. The bearing contact angle measuring instrument according to claim 2, characterized in that: The installation mechanism (8) includes an installation plate (801), which is fixedly connected to the bottom of the impactor (5). A support box (802) is fixedly connected to the bottom of the installation plate (801). A movable rod (803) is slidably connected to the bottom of the support box (802). A cleaning component (804) is provided at one end of the movable rod (803) away from the support box (802). The movable rod (803) is used to slide and extend on the inner wall of the support box (802).

7. The bearing contact angle measuring instrument according to claim 6, characterized in that: The cleaning assembly (804) includes a control box (8041), which is fixedly connected to one end of a movable rod (803). Rotating cavities (8042) are fixedly connected to both sides of the control box (8041). A swing arm (8043) is slidably connected to the inner wall of the rotating cavity (8042). A folded membrane (8044) is fixedly connected to the surface of the swing arm (8043). A cleaning ring (8045) is fixedly connected to the surface of the swing arm (8043). A storage box (8046) is fixedly connected to one side of the folded membrane (8044). The control box (8041) is used to drive the swing arm (8043) to slide.

8. The bearing contact angle measuring instrument according to claim 7, characterized in that: The cleaning ring (8045) has a cleaning groove on its surface. The cleaning ring (8045) is made of stretchable silicone material. The folded membrane (8044) has elasticity and a receiving groove on its surface. The storage cavity has a cavity inside and the folded membrane (8044) is used to make contact with the inside of the bearing.

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