Bearing axial clearance measuring device and method

Abstract

The invention provides a bearing axial clearance measuring device and method. The bearing axial clearance measuring device comprises a rack, a distance measuring mechanism and an inner and outer raceway supporting mechanism. A ranging mechanism is arranged at the top of the rack; the inner and outer raceway supporting mechanism comprises a threaded rod, an outer raceway support and an inner raceway support, the threaded rod is in threaded connection with the top of the rack, the threaded rod is sleeved with the inner raceway support and the outer raceway support, the threaded rod is sleeved with a bearing to be detected and located between the inner raceway support and the outer raceway support, and the two ends of the threaded rod are in threaded connection with nuts; therefore, the outer raceway support and the inner raceway support respectively press the outer raceway and the inner raceway of the bearing to be detected. The nut presses the outer raceway support or the inner raceway support to apply loads to the inner raceway and the outer raceway of the to-be-detected bearing, the loads can be evenly transmitted in the circumferential direction of the inner raceway and the outer raceway of the to-be-detected bearing, contact stress between the raceways and rolling bodies is kept consistent, and abrasion of the raceways of the to-be-detected bearing caused by uneven load application is avoided.

Description

Technical Field

[0001] This application belongs to the field of bearing clearance measurement technology, specifically relating to a bearing axial clearance measurement device and method. Background Technology

[0002] The clutch bearing is installed in the clutch assembly of a certain type of auxiliary power unit (APU) of a certain aircraft. The core function of this clutch assembly is to automatically disengage the starter motor from the APU when it is started. Therefore, the clutch bearing is a critical component of the assembly. Axial clearance, as a core performance indicator of the bearing, directly affects its operating accuracy, fatigue life, vibration, and axial runout.

[0003] Current measurement techniques generally involve fixing the outer raceway of the bearing, applying a vertical load to the inner raceway to move it, and then using a dial indicator to take the reading. However, this technique has significant drawbacks: uneven load application can severely wear down the bearing raceway surface; dial indicator measurements are greatly affected by human factors, resulting in high errors; automatic data acquisition and recording are not possible; and the materials of the measuring device are prone to contact corrosion or contamination of the bearing, making it difficult to meet the requirements for accurate measurement. Summary of the Invention

[0004] Therefore, the purpose of this application is to provide a bearing axial clearance measuring device and method, which at least solves one of the technical problems mentioned in the background art.

[0005] To address the aforementioned problems, the first aspect of this application provides a bearing axial clearance measuring device, characterized in that it comprises: frame; Distance measuring mechanism; a distance measuring mechanism is provided on the top of the frame; An inner and outer raceway support mechanism; the inner and outer raceway support mechanism includes a threaded rod, an outer raceway support, and an inner raceway support. The threaded rod is threadedly connected to the top of the frame. The inner raceway support and the outer raceway support are sleeved on the threaded rod. The bearing to be tested is sleeved on the threaded rod and located between the inner raceway support and the outer raceway support. Nuts are threadedly connected to both ends of the threaded rod so that the outer raceway support and the inner raceway support respectively press against the outer raceway and the inner raceway of the bearing to be tested.

[0006] Optionally, the inner raceway support of the inner and outer raceway support mechanism is mounted on the frame, and the clearance of one end of the bearing to be tested is measured by the distance measuring mechanism; the outer raceway support of the inner and outer raceway support mechanism is mounted on the frame, and the clearance of the other end of the bearing to be tested is measured by the distance measuring mechanism.

[0007] Optionally, the outer raceway support adopts a cylindrical structure with one end open and the other end closed. The closed end of the outer raceway support is provided with a first positioning hole. The outer raceway support is sleeved on the threaded rod through the first positioning hole. The cylindrical wall of the outer raceway support has at least one notch along the circumferential direction. The notch is used to form an outer raceway measuring point.

[0008] Optionally, the closed end face of the outer raceway support forms a first bearing surface, and the open end face of the outer raceway support forms a bearing outer raceway support surface, which is used to support the outer raceway end face of the bearing to be tested.

[0009] Optionally, the inner raceway support includes a cylindrical base, one end of which forms a second bearing surface and the other end forms a bearing inner raceway support surface. The bearing inner raceway support surface end of the cylindrical base is provided with a centering section, which cooperates with the inner raceway of the bearing to be tested so that the bearing inner raceway support surface supports the inner raceway end face of the bearing to be tested.

[0010] Optionally, the inner raceway support has a second positioning hole along the axial direction, and the inner raceway support is sleeved on the threaded rod through the second positioning hole. The outer peripheral surface of the cylindrical base of the inner raceway support is provided with at least one groove, and the groove is used to form an inner raceway measuring point.

[0011] Optionally, the ranging mechanism includes a position adjustment component and a ranging module, wherein the ranging module is disposed on the position adjustment component, and the position adjustment component is used to adjust the ranging module to different measurement points.

[0012] Optionally, the position adjustment assembly includes a column, a cantilever, and a distance measuring module fixing clip. The column is disposed on the top of the frame and moves relative to the frame in a first direction. The cantilever is disposed on the column and moves relative to the column in a second direction. The distance measuring module fixing clip is disposed on the cantilever and moves relative to the cantilever in a third direction. The distance measuring module fixing clip is used to install the distance measuring module. The position adjustment assembly is used to adjust the distance measuring module in three directions so that the distance measuring module is at different measurement points.

[0013] Optionally, the frame includes a horizontal base, a level, and adjustable feet. The adjustable feet are disposed at the bottom of the horizontal base, the level is disposed on the side wall of the horizontal base, and the adjustable feet are used to adjust the height of the horizontal base so that the frame is level.

[0014] In a second aspect, this application provides a method for measuring bearing axial clearance, wherein the measurement is performed using the bearing axial clearance measuring device described in any one of the above-mentioned methods, wherein the outer raceway support includes an outer raceway support surface, and the inner raceway support includes an inner raceway support surface, and the measurement method includes: The outer raceway support, the bearing to be tested, and the inner raceway support are sequentially passed through the threaded rod and placed on the frame. Nuts are screwed onto both ends of the threaded rod to press the inner raceway of the bearing to be tested. The distance measuring mechanism is operated to measure the height of the outer raceway support surface of the bearing, the height of the outer raceway end face of the bearing to be tested, and the height of the inner raceway end face of the bearing to be tested. The outer raceway height of the bearing under test is calculated based on the difference between the height of the outer raceway end face and the height of the bearing outer raceway support surface; the first end axial clearance value of the bearing under test is calculated based on the difference between the height of the outer raceway end face and the height of the inner raceway end face. Keep the installation direction of the bearing to be tested unchanged; place the inner raceway support, the bearing to be tested and the outer raceway support sequentially through the threaded rod on the frame, and screw the nuts at both ends of the threaded rod to press the outer raceway of the bearing to be tested; operate the distance measuring mechanism to measure the height of the inner raceway support surface of the bearing, the height of the inner raceway end face of the bearing to be tested and the height of the outer raceway end face of the bearing respectively; The inner raceway height of the bearing under test is calculated based on the difference between the inner raceway end face height and the inner raceway support surface height; the second end axial clearance value of the bearing under test is calculated based on the difference between the inner raceway end face height and the outer raceway end face height.

[0015] By employing the above technical solution, the present invention has at least the following beneficial effects: This application provides a bearing axial clearance measuring device and method. The bearing to be tested is placed between an outer raceway support and an inner raceway support, and nuts are screwed to both ends of a threaded rod. By pressing the outer raceway support or the inner raceway support with the nuts, a load is applied to the inner and outer raceways of the bearing to be tested. The load is evenly transmitted along the circumferential direction of the inner and outer raceways of the bearing to be tested, so that the contact stress between the raceway and the rolling element is consistent, and wear of the bearing raceway caused by uneven load application is avoided. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the bearing axial clearance measuring device according to an embodiment of this application (with the inner raceway supported on top). Figure 2 This is a schematic diagram of the bearing axial clearance measuring device according to an embodiment of this application (with the outer raceway supported on top). Figure 3 This is a schematic diagram of the inner and outer raceway support mechanism according to an embodiment of this application; Figure 4 This is a top view of the inner and outer raceway support mechanism according to an embodiment of this application; Figure 5 This is a bottom view of the inner and outer raceway support mechanism according to an embodiment of this application; Figure 6 This is a first-view schematic diagram of the outer raceway support according to an embodiment of this application; Figure 7 This is a second-view schematic diagram of the outer roller support according to an embodiment of this application; Figure 8 This is a first-view schematic diagram of the inner raceway support according to an embodiment of this application; Figure 9 This is a schematic diagram illustrating the second perspective support of the inner roller track in an embodiment of this application.

[0017] The reference numerals in the attached figures are as follows: 1. Frame; 11. Level base; 12. Level; 13. Adjustable feet; 2. Distance measuring mechanism; 21. Column; 22. Cantilever; 23. Distance measuring module fixing clip; 3. Inner and outer raceway support mechanism; 31. Outer raceway support; 3101. Notch; 3102. First bearing surface; 3103. Bearing outer raceway support surface; 3104. First positioning hole; 3105. Outer raceway measuring point; 32. Inner raceway support; 3201. Second positioning hole; 3202. Groove; 3203. Second bearing surface; 3204. Bearing inner raceway support surface; 3205. Centering section; 3206. Inner raceway measuring point; 33. Threaded rod; 34. Nut; 4. Bearing to be tested. Detailed Implementation

[0018] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention 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 limiting the present invention.

[0019] Furthermore, the terms "first" and "second" 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" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0020] In this application, unless otherwise expressly 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 connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0022] See also Figures 1 to 9 As shown, according to a first aspect of the embodiments of this application, a bearing axial clearance measuring device is provided, including a frame 1, a measuring mechanism 2, and an inner and outer raceway support mechanism 3; the measuring mechanism 2 is provided on the top of the frame 1; the inner and outer raceway support mechanism 3 includes a threaded rod 33, an outer raceway support 31, and an inner raceway support 32. The threaded rod 33 is threadedly connected to the top of the frame 1, and the inner raceway support 32 and the outer raceway support 31 are sleeved on the threaded rod 33. The bearing 4 to be tested is sleeved on the threaded rod 33 and is located between the inner raceway support 32 and the outer raceway support 31. Nuts 34 are threadedly connected to both ends of the threaded rod 33 so that the outer raceway support 31 and the inner raceway support 32 respectively press against the outer raceway and the inner raceway of the bearing 4 to be tested.

[0023] The bearing 4 to be tested is placed between the outer raceway support 31 and the inner raceway support 32, and nuts 34 are screwed onto both ends of the threaded rod 33. By tightening the outer raceway support 31 or the inner raceway support 32 with the nuts 34, a load is applied to the inner and outer raceways of the bearing 4 to be tested. The load is evenly transmitted along the circumferential direction of the inner and outer raceways of the bearing 4 to be tested, so that the contact stress between the raceway and the rolling elements is consistent, avoiding wear of the raceway of the bearing 4 to be tested due to uneven load application. At the same time, the pressure applied by tightening the nuts 34 can be used to quantify the pressure on the raceway during the clearance measurement of bearings of different sizes and materials.

[0024] The inner raceway support 32 and the outer raceway support 31 are sleeved on the threaded rod 33. The bearing 4 to be tested is sleeved on the threaded rod 33 and located between the inner raceway support 32 and the outer raceway support 31. The inner raceway support 32 is used to support the inner raceway of the bearing 4 to be tested, and the outer raceway support 31 is used to support the outer raceway of the bearing 4 to be tested. When the outer raceway support 31 is arranged on the frame 1, when the inner raceway support 32 is pressed by rotating the nut 34 on the threaded rod 33, the inner raceway of the bearing 4 to be tested moves relative to the outer raceway toward the frame 1, so as to realize the measurement of the first end axial clearance of the bearing 4 to be tested. When the inner raceway support 32 is arranged on the frame 1, when the outer raceway support 31 is pressed by rotating the nut 34 on the threaded rod 33, the outer raceway of the bearing 4 to be tested moves relative to the inner raceway toward the frame 1, so as to realize the measurement of the second end axial clearance of the bearing 4 to be tested.

[0025] Specifically, the outer diameter of the outer raceway support 31 is larger than the outer diameter of the inner raceway support 32.

[0026] The frame 1 includes a horizontal base 11, a level 12, and adjustable feet 13. The adjustable feet 13 are located at the bottom of the horizontal base 11, and the level 12 is located on the side wall of the horizontal base 11. The adjustable feet 13 are used to adjust the height of the horizontal base 11 so that the frame 1 is horizontal.

[0027] Among them, the level 12 consists of two side walls that are respectively located on the horizontal base 11. The level 12 is used to observe whether the horizontal base 11 is in a horizontal state. The height of the horizontal base 11 is adjusted in conjunction with the adjustable support 13 so that the horizontal base 11 is always in a horizontal state, thus ensuring the accuracy of the axial clearance detection of the bearing 4 to be tested.

[0028] The horizontal base 11 has at least two stepped holes, and the outer raceway support 31 or the inner raceway support 32 is disposed within the two stepped holes. The horizontal base 11 has at least two stepped holes to accommodate multiple sets of inner and outer raceway support mechanisms 3 of different sizes, for measuring the clearance of bearings of different sizes and models.

[0029] The two-stage stepped hole includes a large hole and a small hole. When the outer raceway support 31 is installed on the frame 1, it is located in the large hole of the two-stage stepped hole to limit axial and radial displacement and ensure the coaxiality of the outer raceway support 31 and the threaded rod 33. When the inner raceway support 32 is installed on the frame 1, it is located in the small hole of the two-stage stepped hole to limit axial and radial displacement and ensure the coaxiality of the inner raceway support 32 and the threaded rod 33.

[0030] Among them, the outer raceway support 31 and the inner raceway support 32 are made of AISI4140 alloy steel, which has the advantages of corrosion resistance, electrochemical compatibility, high wear resistance and structural stability, eliminating the possibility of the raceway support as a corrosion inducer and contaminant carrier from the source, thereby protecting the core components of the bearing.

[0031] In another embodiment, the outer raceway support 31 adopts a cylindrical structure with one end open and the other end closed. The closed end of the outer raceway support 31 is provided with a first positioning hole 3104. The outer raceway support 31 is sleeved on the threaded rod 33 through the first positioning hole 3104. The cylindrical wall of the outer raceway support 31 has at least one notch 3101 along the circumferential direction. The notch 3101 is used to form the outer raceway measuring point 3105.

[0032] The outer raceway support 31 adopts a cylindrical structure with one open end and one closed end, which has the advantage of being lightweight and easy to handle during the measurement of the clearance of the bearing 4 to be tested. The closed end of the outer raceway support 31 is provided with a first positioning hole 3104, which is coaxial with the cylindrical structure. The first positioning hole 3104 is used to pass through the threaded rod 33 and install it at the large hole of the two-stage stepped hole of the frame 1.

[0033] The outer raceway support 31 has at least one notch 3101 axially formed in the cylinder wall. The notch 3101 is the same length as the outer raceway support 31, that is, it is formed along the entire length of the outer raceway support 31. When the outer raceway of the bearing 4 to be tested is pressed by the outer raceway support 31, the outer raceway end face of the bearing 4 to be tested exposed through the notch 3101 forms the outer raceway measurement point 3105.

[0034] Specifically, in this embodiment, four notches 3101 are equally spaced along the circumference to form four outer raceway measurement points 3105.

[0035] In another embodiment, the closed end face of the outer raceway support 31 forms a first bearing surface 3102, and the open end face of the outer raceway support 31 forms a bearing outer raceway support surface 3103, which is used to support the outer raceway end face of the bearing 4 to be tested.

[0036] The outer end face of the closed end of the outer raceway support 31 forms a first bearing surface 3102. When the outer raceway support 31 is placed in the large hole of the two-stage stepped hole of the frame 1, the first bearing surface 3102 of the outer raceway support 31 is in contact with the bottom of the large hole. When the outer raceway support 31 is placed on the bearing 4 to be tested and away from the frame 1, the nut 34 on the rotating threaded rod 33 presses the first bearing surface 3102 of the outer raceway support 31. The end face of the open end of the outer raceway support 31 forms the bearing outer raceway support surface 3103, which is always in contact with the outer raceway end face of the bearing 4 to be tested during the testing process.

[0037] In another embodiment, the inner raceway support 32 includes a cylindrical base, one end of which forms a second bearing surface 3203, and the other end forms a bearing inner raceway support surface 3204. The bearing inner raceway support surface 3204 of the cylindrical base is provided with a centering section 3205, which cooperates with the inner raceway of the bearing 4 to be tested, so that the bearing inner raceway support surface 3204 supports the inner raceway end face of the bearing 4 to be tested.

[0038] One end of the cylindrical base forms a second bearing surface 3203, and the other end forms a bearing inner raceway support surface 3204. When the inner raceway support 32 is placed in the small hole of the two-stage stepped hole of the frame 1, the second bearing surface 3203 of the inner raceway support 32 is in contact with the bottom of the small hole. When the inner raceway support 32 is placed on the bearing 4 to be tested and away from the frame 1, the nut 34 on the rotating threaded rod 33 presses the second bearing surface 3203 of the inner raceway support 32. During the test, the bearing inner raceway support surface 3204 of the inner raceway support 32 is always in contact with the inner raceway end face of the bearing 4 to be tested.

[0039] The bearing inner raceway support surface 3204 of the cylindrical base is provided with a centering section 3205. The centering section 3205 extends axially and its outer diameter is smaller than that of the cylindrical base. The centering section 3205 is used to cooperate with the inner raceway of the bearing 4 to be tested so that the bearing inner raceway support surface 3204 is always in contact with the inner raceway end face of the bearing 4 to be tested.

[0040] In another embodiment, the inner raceway support 32 has a second positioning hole 3201 along the axial direction. The inner raceway support 32 is sleeved on the threaded rod 33 through the second positioning hole 3201. The outer peripheral surface of the cylindrical base of the inner raceway support 32 is provided with at least one groove 3202, which is used to form the inner raceway measuring point 3206.

[0041] The inner raceway support 32 has a second positioning hole 3201 along the axial direction. The second positioning hole 3201 is opened along the entire length of the inner raceway support 32, and the inner raceway support 32 is sleeved on the threaded rod 33 through the second positioning hole 3201.

[0042] The inner raceway support 32 has at least one groove 3202 on the outer peripheral surface of the cylindrical base. When the inner raceway support 32 is located on the bearing 4 to be tested, the inner raceway end face of the bearing 4 to be tested is exposed through the groove 3202, forming an inner raceway measurement point 3206.

[0043] In this embodiment, four grooves 3202 are arranged at equal intervals on the outer circumferential surface of the cylindrical base along the inner raceway support 32, forming four inner raceway measurement points 3206.

[0044] In another embodiment, the ranging mechanism 2 includes a position adjustment component and a ranging module. The ranging module is disposed on the position adjustment component, which is used to adjust the ranging module to different measurement points.

[0045] The position adjustment component is used to move the measuring module in the X, Y, and Z directions, allowing the ranging module to be moved to different measuring points. This improves the accuracy of data acquisition from the bearing under test (4) and ensures that accurate axial clearance values ​​are obtained. Simultaneously, the automated data acquisition by the ranging module eliminates interference from human factors, significantly reducing measurement errors.

[0046] Specifically, in this embodiment, the ranging module is a laser rangefinder.

[0047] In another embodiment, the position adjustment assembly includes a column 21, a cantilever 22, and a ranging module fixing clip 23. The column 21 is disposed on the top of the frame 1 and moves relative to the frame 1 in a first direction. The cantilever 22 is disposed on the column 21 and moves relative to the column 21 in a second direction. The ranging module fixing clip 23 is disposed on the cantilever 22 and moves relative to the cantilever 22 in a third direction. The ranging module fixing clip 23 is used to install the ranging module. The position adjustment assembly is used to adjust the ranging module in three directions so that the ranging module is at different measurement points.

[0048] The column 21 is located on the top of the frame 1 and moves relative to the frame 1 in the first direction (X direction). One end of the horizontal base 11 of the frame 1 is provided with a base guide groove. The column 21 and the horizontal base 11 are provided with a column guide block. The column guide block and the base guide groove cooperate to enable the column 21 to move on the horizontal base 11 in the first direction.

[0049] Specifically, the base guide groove has a sliding groove for fastening screws. The two ends of the sliding groove do not penetrate the groove wall of the base guide groove, which is used to limit the movement of the column 21 along the first direction and prevent it from slipping off the base guide groove. A fastening screw is slidably installed in the sliding groove, and the screw end of the fastening screw is screwed to the column guide block. Tightening the fastening screw restricts the position of the column guide block, and loosening the fastening screw allows the column guide block to slide along the base guide groove.

[0050] The cantilever 22 is mounted on the column 21 and moves relative to the column 21 along a second direction. The column 21 is provided with a column guide groove, and one end of the cantilever 22 is provided with a cantilever guide block. The cantilever guide block cooperates with the column guide groove to allow the cantilever 22 to move relative to the column 21 along the second direction (Z direction). The fastening method of the cantilever 22 relative to the column 21 is the same as the fastening method of the column 21 relative to the horizontal base 11, and will not be described again.

[0051] The ranging module fixing clip 23 is mounted on the cantilever 22 and moves relative to the cantilever 22 in a third direction. The cantilever 22 has a cantilever guide groove, and the ranging module fixing clip 23 has a fixing clip guide block. The fixing clip guide block cooperates with the cantilever guide groove to allow the ranging module fixing clip 23 to move relative to the cantilever 22 in a third direction (Y direction). The fastening method between the ranging module fixing clip 23 and the cantilever 22 is the same as the fastening method between the column 21 and the horizontal base 11, and will not be described further.

[0052] The mounting end of the ranging module fixing clip 23 extends to the outside of the cantilever guide groove of the cantilever 22 for mounting the ranging module. Precise adjustment in three directions via the position adjustment component allows the ranging module to be moved to different measurement points.

[0053] A second aspect of this application provides a method for measuring bearing axial clearance, wherein the measurement is performed using any of the bearing axial clearance measuring devices described above. The outer raceway support 31 includes an outer raceway support surface 3103, and the inner raceway support 32 includes an inner raceway support surface 3204. The measurement method includes: Step S1: Place the outer raceway support 31, the bearing to be tested 4 and the inner raceway support 32 through the threaded rod 33 onto the frame 1, and screw the nuts 34 at both ends of the threaded rod 33 to press the inner raceway of the bearing to be tested 4; operate the distance measuring mechanism 2 to measure the height of the outer raceway support surface 3103 of the bearing, the height of the outer raceway end face of the bearing to be tested (4) and the height of the inner raceway end face.

[0054] Before testing, the level base 11 is adjusted to be level by using the level ruler 12 and the adjustable bracket 13.

[0055] The outer raceway support 31 is inserted through the first positioning hole 3104 and the threaded rod 33 into the large hole of the two-stage stepped hole of the frame 1, so that the first bearing surface 3102 of the outer raceway support 31 is in contact with the bottom of the large hole; the position of the measuring module is adjusted by the position adjustment component, and the height of the bearing outer raceway support surface 3103 is measured by the measuring module.

[0056] The bearing 4 to be tested is placed on the bearing outer raceway support surface 3103 of the outer raceway support 31 through the threaded rod 33, and the distance measuring module is operated to measure the height of the outer raceway end face.

[0057] The inner raceway support 32 is placed on the bearing 4 to be tested through the threaded rod 33 via the second positioning hole 3201, so that the centering section 3205 mates with the inner raceway of the bearing 4 to be tested, and the inner raceway support surface 3204 of the bearing is in contact with the end face of the inner raceway of the bearing 4 to be tested. Then, the nuts 34 are tightened at both ends of the threaded rod 33 so that the inner raceway of the bearing 4 to be tested moves relative to the outer raceway toward the horizontal base 11 and is pressed. The distance measuring module is then used to measure the height of the end face of the inner raceway.

[0058] Step S2: Based on the difference between the height of the outer raceway end face and the height of the bearing outer raceway support surface 3103, the outer raceway height of the bearing to be tested 4 is calculated; based on the difference between the height of the outer raceway end face and the height of the inner raceway end face, the first end axial clearance value of the bearing to be tested 4 is calculated.

[0059] Step S3: Keep the installation direction of the bearing 4 to be tested unchanged; place the inner raceway support 32, the bearing 4 to be tested, and the outer raceway support 31 on the frame 1 by passing them through the threaded rod 33 in sequence, and screw the nuts 34 at both ends of the threaded rod 33 to press the outer raceway of the bearing 4 to be tested; operate the distance measuring mechanism 2 to measure the height of the inner raceway support surface 3204 of the bearing, the height of the inner raceway end face of the bearing 4 to be tested, and the height of the outer raceway end face.

[0060] The inner raceway support 32 is inserted through the second positioning hole 3201 and threaded rod 33 into the small hole of the two-stage stepped hole of the frame 1, so that the second bearing surface 3203 of the inner raceway support 32 is in contact with the bottom of the small hole; the position of the measuring module is adjusted by the position adjustment component, and the height of the bearing inner raceway support surface 3204 is measured by the measuring module.

[0061] Keep the installation direction of the bearing 4 to be tested unchanged; place the bearing 4 to be tested through the threaded rod 33 on the bearing inner raceway support surface 3204 of the inner raceway support 32, and ensure that the fixed middle section 3205 is in sync with the inner raceway of the bearing 4 to be tested, and operate the distance measuring module to measure the height of the inner raceway end face.

[0062] The outer raceway support 31 is placed on the bearing 4 to be tested through the threaded rod 33 via the first positioning hole 3104, so that the outer raceway support surface 3103 of the bearing is in contact with the outer raceway end face of the bearing 4 to be tested. Then, the nuts 34 are tightened at both ends of the threaded rod 33 so that the outer raceway of the bearing 4 to be tested moves relative to the inner raceway toward the horizontal base 11 and is pressed. The distance measuring module is operated to measure the height of the outer raceway end face.

[0063] Step S4: Based on the difference between the height of the inner raceway end face and the height of the inner raceway support surface, calculate the inner raceway height of the bearing 4 to be tested; based on the difference between the height of the inner raceway end face and the height of the outer raceway end face, calculate the second end axial clearance value of the bearing to be tested.

[0064] In practical use, the ranging module connects to an embedded industrial all-in-one machine to transmit the detected data. The embedded industrial all-in-one machine then calculates the axial clearance of the bearing 4 under test. The laser rangefinder connects to the embedded industrial all-in-one machine via an RS232 serial port, enabling automatic data collection and recording, and automatic calculation of the axial clearance of the bearing under test. This avoids large errors caused by human error and greatly reduces workload.

[0065] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0066] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A bearing axial play measuring device, characterized in that, Include: Frame (1); Distance measuring mechanism (2);The frame (1) top is provided with distance measuring mechanism (2); Inner and outer raceway support mechanism (3);The inner and outer raceway support mechanism (3) includes threaded rod (33), outer raceway support (31) and inner raceway support (32), the threaded rod (33) is threadedly connected at the top of the frame (1), the inner raceway support (32) and the outer raceway support (31) are sleeved on the threaded rod (33), the bearing (4) to be detected is sleeved on the threaded rod (33), and is located between the inner raceway support (32) and the outer raceway support (31), the threaded rod (33) both ends are threadedly connected with the nut (34), so that the outer raceway support (31) and the inner raceway support (32) are respectively pressed to the outer raceway and the inner raceway of the bearing (4) to be detected.

2. A bearing axial play measuring device according to claim 1, characterized in that The inner raceway support (32) of the inner and outer raceway support mechanism (3) is arranged on the frame (1), and the end play of the bearing (4) to be detected is measured by the distance measuring mechanism (2);The outer raceway support (31) of the inner and outer raceway support mechanism (3) is arranged on the frame (1), and the end play of the bearing (4) to be detected is measured by the distance measuring mechanism (2).

3. A bearing axial play measuring device according to claim 2, characterized in that The outer raceway support (31) adopts a cylindrical structure with one end open and the other end closed, the closed end of the outer raceway support (31) is provided with a first positioning hole (3104), the outer raceway support (31) is sleeved on the threaded rod (33) through the first positioning hole (3104), and at least one notch (3101) is formed on the circumferential wall of the outer raceway support (31), and the notch (3101) is used to form an outer raceway measurement point.

4. A bearing axial play measuring device according to claim 3, characterized in that The outer end surface of the closed end of the outer raceway support (31) forms a first pressure bearing surface (3102), and the end surface of the open end of the outer raceway support (31) forms a bearing outer raceway support surface (3103), and the bearing outer raceway support surface (3103) is used to support the outer raceway end surface of the bearing (4) to be detected.

5. A bearing axial play measuring device according to claim 2, characterized in that The inner raceway support (32) includes a cylindrical base body, one end of the cylindrical base body forms a second pressure bearing surface (3203), the other end forms a bearing inner raceway support surface (3204), and the bearing inner raceway support surface (3204) end of the cylindrical base body is provided with a centering section (3205), the centering section (3205) is matched with the inner raceway of the bearing (4) to be detected, so that the bearing inner raceway support surface (3204) supports the inner raceway end surface of the bearing (4) to be detected.

6. A bearing axial play measuring device according to claim 5, characterized in that The inner raceway support (32) is provided with a second positioning hole (3201) in the axial direction, the inner raceway support (32) is sleeved on the threaded rod (33) through the second positioning hole (3201), and at least one groove (3202) is formed on the outer circumferential surface of the cylindrical base body of the inner raceway support (32), and the groove (3202) is used to form an inner raceway measurement point.

7. A bearing axial play measuring device according to claim 1, characterized in that The ranging mechanism (2) comprises a position adjusting assembly and a ranging module, the ranging module is arranged on the position adjusting assembly, and the position adjusting assembly is used for adjusting the ranging module to different measuring points.

8. A bearing axial play measuring device according to claim 7, characterized in that The position adjusting assembly comprises a stand (21), a cantilever (22) and a ranging module fixing clamp (23), the stand (21) is arranged on the top of the rack (1) and moves along a first direction relative to the rack (1); the cantilever (22) is arranged on the stand (21) and moves along a second direction relative to the stand (21); the ranging module fixing clamp (23) is arranged on the cantilever (22) and moves along a third direction relative to the cantilever (22), the ranging module fixing clamp (23) is used for installing the ranging module, and the position adjusting assembly is used for adjusting the ranging module in three directions so that the ranging module is at different measuring points.

9. A bearing axial play measuring device according to claim 1, characterized in that The rack (1) comprises a horizontal base (11), a level (12) and an adjustable supporting leg (13), the adjustable supporting leg (13) is arranged on the bottom of the horizontal base (11), the level (12) is arranged on the side wall of the horizontal base (11), and the adjustable supporting leg (13) is used for adjusting the height of the horizontal base (11) so that the rack (1) is horizontal.

10. A bearing axial clearance measurement method, the bearing axial clearance measurement device of any one of claims 1 to 9 is used for measurement, the outer raceway support (31) comprises a bearing outer raceway support surface (3103), the inner raceway support (32) comprises a bearing inner raceway support surface (3204), and the measurement method comprises: The outer raceway support (31), the bearing (4) to be detected and the inner raceway support (32) are sequentially arranged on the rack (1) through the threaded rod (33), and the nuts (34) are screwed on both ends of the threaded rod (33) to press the inner raceway of the bearing (4) to be detected; the ranging mechanism (2) is operated to measure the height of the bearing outer raceway support surface (3103), the height of the outer raceway end surface of the bearing (4) to be detected and the height of the inner raceway end surface; The height of the outer raceway of the bearing (4) to be detected is calculated based on the difference between the height of the outer raceway end surface and the height of the bearing outer raceway support surface (3103); and the first end axial clearance value of the bearing (4) to be detected is calculated based on the difference between the height of the outer raceway end surface and the height of the inner raceway end surface; The mounting direction of the bearing (4) to be detected is kept unchanged; the inner raceway support (32), the bearing (4) to be detected and the outer raceway support (31) are sequentially arranged on the rack (1) through the threaded rod (34), and the nuts (34) are screwed on both ends of the threaded rod (33) to press the outer raceway of the bearing (4) to be detected; and the ranging mechanism (2) is operated to measure the height of the bearing inner raceway support surface (3204), the height of the outer raceway end surface of the bearing (4) to be detected and the height of the inner raceway end surface. The inner raceway height of the bearing (4) to be detected is calculated based on the difference between the inner raceway end face height and the inner raceway support face height; and the second end axial clearance value of the bearing (4) to be detected is calculated based on the difference between the inner raceway end face height and the outer raceway end face height.

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