A precise measuring device for axial play of a small joint bearing

Abstract

The utility model relates to bearing measurement technical field, concretely relates to a kind of accurate measuring device of small joint bearing axial play, comprising: support assembly, load, lever assembly and adjusting structure;Support assembly is horizontally erected with bearing positioning ring, and the bearing positioning ring is slidably arranged with pressure column in vertical direction, and the bearing positioning ring above pressure column is used to install the bearing to be measured;Load is used to place in the inner ring end face of the top of the bearing to be measured, and its top and the measuring end of dial gauge contact;Lever assembly is set up on the support assembly below bearing positioning ring, and its one end and pressure column contact, and its other end is provided with load;Adjusting structure is used to adjust the fulcrum of lever assembly, to adjust the amplification ratio of load.The device solves the technical problem that unevenness occurs when manually applying axial force, resulting in data fluctuations, and has the advantages of convenient measurement and high efficiency, realizing accurate measurement of small joint bearing axial play.

Description

Technical Field

[0001] This utility model relates to the field of bearing measurement technology, specifically to a precise measuring device for the axial clearance of a small spherical bearing. Background Technology

[0002] Small spherical plain bearings are widely used in precision mechanisms in robot joints, automobile manufacturing, and aerospace due to their compact structure and flexible rotation. Axial clearance, as a key performance parameter of bearings, directly determines the bearing's rotational accuracy, motion smoothness, and service life. Excessive clearance can easily cause vibration and abnormal noise in the mechanism, while insufficient clearance will increase contact friction and temperature rise, leading to lubrication failure and raceway burn. Therefore, high-precision measurement of the axial clearance of small spherical plain bearings is essential.

[0003] When performing high-precision measurement of the axial clearance of small spherical plain bearings, the small size of the inner and outer rings makes it difficult for traditional measuring tools to stably hold and position the bearings. When manually applying axial force, the force is uneven, which can easily cause fluctuations in the measurement data. Furthermore, there is a lack of special tooling adapted to the spherical contact characteristics of the bearings, resulting in problems such as low measurement efficiency and poor accuracy.

[0004] Therefore, there is a need to provide a precise measuring device for the axial clearance of small spherical bearings to solve the above problems. Utility Model Content

[0005] To address the challenges of stable positioning with traditional measuring tools, uneven axial force application during manual measurement leading to fluctuations in measurement data, and the lack of specialized tooling suitable for the spherical contact characteristics, resulting in low measurement efficiency and poor accuracy, this invention provides a precise measuring device for the axial clearance of small spherical bearings.

[0006] The present invention discloses a precise measuring device for the axial clearance of a small spherical plain bearing, which adopts the following technical solution, including: The support assembly has a bearing positioning ring horizontally mounted on it. A pressure column is slidably mounted inside the bearing positioning ring along the vertical direction. The bearing positioning ring above the pressure column is used to install the bearing to be tested. The load is placed on the inner ring end face at the top of the bearing being tested, with its top in contact with the measuring end of the dial indicator. The lever assembly is located on the support assembly below the bearing positioning ring, with one end in contact with the pressure column and the other end bearing a load. And an adjustment structure for adjusting the fulcrum of the lever assembly to adjust the load amplification ratio.

[0007] A further technical solution of this utility model is that the lever assembly includes: a support on which a lever is rotatably connected, one end of the lever is used to set a load, and the other end of the lever is provided with a support part for the vertical lever, wherein the support part is in contact with the bottom surface of the pressure column.

[0008] A further technical solution of this utility model includes an adjustment structure comprising: multiple adjustment holes evenly distributed along the lever axis, wherein the adjustment holes of the lever are used for rotatable connection with a support screw and a support; wherein the support is slidably connected to the support assembly, and the sliding direction of the support is the lever axis.

[0009] A further technical solution of this utility model is that a fixing screw is provided on the support, and the fixing screw is used to fix the position of the support on the support assembly.

[0010] In a further technical solution of this utility model, the bearing positioning ring has a positioning stepped hole, wherein the pressure column is slidably disposed in the small hole of the positioning stepped hole, the outer ring of the bearing under test is supported on the stepped surface of the positioning stepped hole, and the inner ring of the bearing under test is located in the small hole of the positioning stepped hole.

[0011] A further technical solution of this utility model includes a supporting component comprising: A horizontal support plate with a sliding groove is provided on it. A slider is provided at the bottom of the support. The slider is slidably connected to the sliding groove. The fixing screw passes through the slider and is tightened in the sliding groove. And a vertical support plate, which is vertically fixed to the horizontal support plate, and a bearing positioning ring is detachably connected to the vertical support plate on the side facing the support.

[0012] A further technical solution of this utility model is that a long strip hole along the vertical direction is provided on the vertical support plate, and a connecting screw is provided in the long strip hole. After the connecting screw passes through the long strip hole, it is connected to the bearing positioning ring. By adjusting the position of the connecting screw in the long strip hole, the height of the bearing positioning ring is adjusted so that the bottom of the pressure column and the support part of the lever come into contact.

[0013] A further technical solution of this utility model is that the bearing positioning ring is an annular body with a groove on one side. A connecting lug is provided at the groove of the annular body. The two connecting lugs are connected by bolts to tighten the groove and ensure that the inner hole of the annular body clamps the outer ring of the bearing being tested.

[0014] A further technical solution of this utility model is that the load is slidably mounted on the lever.

[0015] The beneficial effects of this utility model are: This invention utilizes a lever assembly to amplify the load and transforms it into stable pressure through a stable mechanical structure. This design solves the technical problem of uneven force when manually applying axial force, which leads to data fluctuations. It also offers the advantages of convenient and efficient measurement. Furthermore, by replacing different bearing positioning rings and loads, it can meet the axial clearance detection requirements of various bearings, ultimately achieving accurate measurement of the axial clearance of small spherical bearings. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of a precise measuring device for the axial clearance of a small spherical bearing according to the present invention; Figure 2 This is a schematic diagram of the support component in an embodiment of the present invention; Figure 3 This is a schematic diagram of the bearing positioning ring in an embodiment of the present invention; Figure 4 This is a schematic diagram of the support structure in an embodiment of this utility model; Figure 5 This is a schematic diagram of the load structure in an embodiment of this utility model.

[0018] In the diagram: 1. Vertical support plate; 2. Bearing positioning ring; 3. Load; 4. Bearing under test; 5. Pressure column; 6. Lever; 7. Support; 8. Load; 9. Fixing screw; 10. Support screw; 11. Connecting screw. Detailed Implementation

[0019] 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.

[0020] An embodiment of the present invention provides a precise measuring device for the axial clearance of a small spherical bearing, such as... Figure 1 As shown, it includes: a support assembly, a load 3, a lever assembly, and an adjustment structure. A bearing positioning ring 2 is horizontally mounted on the support assembly. A pressure column 5 is slidably mounted vertically inside the bearing positioning ring 2. The bearing positioning ring 2 above the pressure column 5 is used to install the bearing 4 under test. The load 3 is used to place the inner ring end of the top of the bearing 4 under test, and the top of the load 3 is in contact with the measuring end of the dial indicator. The lever assembly is set on the support assembly below the bearing positioning ring 2. One end of the lever assembly is in contact with the pressure column 5, and the other end of the lever assembly is equipped with a load 8. The adjustment structure is used to adjust the fulcrum of the lever assembly to adjust the amplification ratio of the load 8.

[0021] For example, in one specific embodiment, the lever assembly includes: a support 7 on which a lever 6 is rotatably connected, one end of the lever 6 is used to connect a load 8, and the other end of the lever 6 is provided with a support portion for the vertical lever 6, wherein the support portion is in contact with the bottom surface of the pressure column 5.

[0022] For example, in one specific embodiment, the adjustment structure includes: multiple adjustment holes evenly distributed along the axial direction of the lever 6, the adjustment holes of the lever 6 being used for rotatable connection between the support screw 10 and the support 7; wherein, the support 7 is slidably connected to the support assembly, and the sliding direction of the support 7 is the axial direction of the lever 6. In this embodiment, to ensure the position of the adjusted support 7 so as to ensure that the support portion of the lever 6 and the bottom center of the pressure column 5 are aligned, a fixing screw 9 is provided on the support 7 in one specific embodiment, the fixing screw 9 being used to fix the position of the support 7 on the support assembly.

[0023] For example, such as Figure 3 As shown, in one specific embodiment, the bearing positioning ring 2 has a positioning stepped hole, wherein the pressure post 5 is slidably disposed in the small hole of the positioning stepped hole, the outer ring of the bearing under test 4 is supported on the stepped surface of the positioning stepped hole, and the inner ring of the bearing under test 4 is located in the small hole of the positioning stepped hole. The bearing positioning ring 2 is an annular body with a groove on one side, and a connecting lug is provided at the groove. The two connecting lugs are connected by bolts to tighten the groove, ensuring that the inner hole of the annular body clamps the outer ring of the bearing under test 4.

[0024] For example, such as Figure 2 As shown, in one specific embodiment, the support assembly includes: a horizontal support plate and a vertical support plate 1. The horizontal support plate has a sliding groove, wherein, as shown... Figure 1 and Figure 4 As shown, a slider is provided at the bottom of the support 7, and the slider is slidably connected to the slide groove. The fixing screw 9 passes through the slider and is tightened in the slide groove; the vertical support plate 1 is vertically fixed on the horizontal support plate, and the bearing positioning ring 2 is detachably connected to the vertical support plate 1 on the side facing the support 7; wherein, as Figure 2 In the right view, a long strip hole is provided on the vertical support plate 1 along the vertical direction. A connecting screw 11 is provided in the long strip hole. After the connecting screw 11 passes through the long strip hole, it is connected to the bearing positioning ring 2. By adjusting the position of the connecting screw 11 in the long strip hole, the height of the bearing positioning ring 2 is adjusted so that the bottom of the pressure column 5 contacts the support part of the lever 6.

[0025] For example, in one specific embodiment, the load 8 is slidably disposed on the lever 6. It should be noted that, as Figure 5As shown, the weight of the load 8 is related to its size. The specific size is designed according to the load value required by the process and the amplification ratio of the lever 6. In order to ensure the accuracy of the amplification ratio, the thickness h of the load 8 is as small as possible to ensure that the center of gravity is biased towards one end of the lever 6.

[0026] Installation method: Step 1: Secure the vertical support plate 1 of the support assembly to the bearing positioning ring 2 using connecting screws 11 and washers, so that the bearing positioning ring 2 is in a horizontal state.

[0027] Step 2: Install the slider at the bottom of the support 7 into the groove of the horizontal support plate of the support assembly. Select the appropriate adjustment hole position according to the process requirements and the required load amplification ratio. Secure the lever 6 and the support 7 with the support screw 10 and the washer to ensure that the lever 6 will not move in the horizontal direction and can rotate around the support screw 10. After connecting the adjustment hole of the lever 6 and the support 7, secure the support 7 with the fixing screw 9 and the washer.

[0028] Step 3: Install the pressure column 5 into the small hole of the positioning step hole of the bearing positioning ring 2, and make the support part of the lever 6 contact the center of the pressure column 5.

[0029] Measurement method: Step 1: Check whether the bearing positioning ring 2 is in a horizontal state. Select the appropriate lever hole position according to the process requirements and the required load amplification ratio to install the lever 6. Check whether the end of the lever 6 is in contact with the center position of the lower pressure cover 5.

[0030] Step 2, according to Figure 1 Install the bearing 4 to be tested and the load 3 in the correct position; that is, install the bearing 4 to be tested in the positioning step hole of the bearing positioning ring 2, so that the outer ring end face of the bearing 4 to be tested is in contact with the step surface of the positioning step hole. Then, use screws to connect the two connecting ears of the bearing positioning ring 2 with bolts to tighten the groove and ensure that the inner hole of the ring body clamps the outer ring of the bearing 4 to be tested. Then, place the load 3 on the inner ring end face at the top of the bearing 4 to be tested.

[0031] Step 3: Place the dial indicator needle at the center of the load 3 end face; install the load 8 onto one end of the lever 6, and observe the dial indicator reading after the bearing 4 under test is subjected to pressure; remove the load 8, press the load 3 by hand with appropriate force, and record the needle reading; in this embodiment, the difference between the two needle readings is the clearance value measured this time. Rotate the inner ring multiple times to perform the measurement, and take the average value as the axial clearance value of the bearing. (If rotation is difficult, loosen the fastening screws and reposition the bearing).

[0032] The measuring device of this utility model adopts the direct measurement method. Taking G15E as an example, the specific steps are as follows: (1) Securely install each part of the measuring device according to the installation method; (2) Place the bearing 4 to be tested with its reference surface facing upward in the bearing positioning ring 2; (3) Place load 3 smoothly on the inner ring end face of the bearing; (4) Place the pointer of the dial indicator at the center of load 3, apply appropriate pressure and zero it; (5) Slide the load 8 onto one end of the lever 6; (6) Read the maximum value of the dial indicator and rotate the inner ring of the bearing 4 being tested to perform multiple measurements.

[0033] The axial clearance of the G15E bearing is required to be 0.03 to 0.08 mm. The maximum values ​​of the axial clearance swing measured by the dial indicator in six measurements were 0.048 mm, 0.035 mm, 0.036 mm, 0.045 mm, 0.046 mm, and 0.03 mm, respectively. The values ​​are within the required range and the measurement accuracy is high, with good consistency.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A precise measuring device for the axial clearance of a small spherical plain bearing, characterized in that, include: The support assembly has a bearing positioning ring horizontally mounted on it. A pressure column is slidably mounted inside the bearing positioning ring along the vertical direction. The bearing positioning ring above the pressure column is used to install the bearing to be tested. The load is placed on the inner ring end face at the top of the bearing being tested, with its top in contact with the measuring end of the dial indicator. The lever assembly is located on the support assembly below the bearing positioning ring, with one end in contact with the pressure column and the other end bearing a load. And an adjustment structure for adjusting the fulcrum of the lever assembly to adjust the load amplification ratio.

2. The precise measuring device for axial clearance of a small spherical plain bearing according to claim 1, characterized in that, The lever assembly includes: a support on which a lever is rotatably connected, one end of the lever being used to set a load, and the other end of the lever being provided with a support portion for the vertical lever, wherein the support portion is in contact with the bottom surface of the pressure column.

3. The precise measuring device for axial clearance of a small spherical plain bearing according to claim 2, characterized in that, The adjustment structure includes: multiple adjustment holes evenly distributed along the lever axis, the adjustment holes of the lever being used for rotatable connection with the support screw and the support; wherein, the support is slidably connected to the support assembly, and the sliding direction of the support is the lever axis.

4. The precise measuring device for axial clearance of a small spherical plain bearing according to claim 3, characterized in that, The support is equipped with fixing screws, which are used to fix the position of the support on the support assembly.

5. The precise measuring device for axial clearance of a small spherical plain bearing according to claim 1, characterized in that, The bearing positioning ring has a positioning stepped hole, in which the pressure column is slidably set in the small hole of the positioning stepped hole, the outer ring of the bearing under test is supported on the stepped surface of the positioning stepped hole, and the inner ring of the bearing under test is located in the small hole of the positioning stepped hole.

6. The precise measuring device for axial clearance of a small spherical plain bearing according to claim 4, characterized in that, Supporting components include: A horizontal support plate with a sliding groove is provided on it. A slider is provided at the bottom of the support. The slider is slidably connected to the sliding groove. The fixing screw passes through the slider and is tightened in the sliding groove. And a vertical support plate, which is vertically fixed to the horizontal support plate, and a bearing positioning ring is detachably connected to the vertical support plate on the side facing the support.

7. The precise measuring device for axial clearance of a small spherical plain bearing according to claim 6, characterized in that, The vertical support plate has a long, narrow hole along the vertical direction. A connecting screw is installed in the long, narrow hole. After passing through the long, narrow hole, the connecting screw connects to the bearing positioning ring. By adjusting the position of the connecting screw in the long, narrow hole, the height of the bearing positioning ring is adjusted so that the bottom of the pressure column contacts the support part of the lever.

8. The precise measuring device for axial clearance of a small spherical plain bearing according to claim 1, characterized in that, The bearing positioning ring is an annular body with a groove on one side. Connecting ears are provided at the groove of the annular body. The two connecting ears are connected by bolts to tighten the groove and ensure that the inner hole of the annular body clamps the outer ring of the bearing being tested.

9. The precise measuring device for axial clearance of a small spherical plain bearing according to claim 2, characterized in that, The load is slidably mounted on the lever.

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