A bearing clearance measuring tool
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SOUTH WEST INST OF TECHN PHYSICS
- Filing Date
- 2025-05-27
- Publication Date
- 2026-06-02
AI Technical Summary
Existing bearing axial clearance measuring equipment makes it difficult to accurately measure radial clearance values because the bearing tilts due to radial clearance during the measurement process.
A bearing clearance measuring fixture was designed, including a support assembly, a constraint assembly, and a lifting assembly. The support assembly supports the outer ring of the bearing, the constraint assembly fixes the inner ring of the bearing by means of a limiting member and a limiting pin, and the lifting assembly lifts the outer ring evenly by means of an inner threaded sleeve and an outer threaded sleeve to ensure that the outer ring does not tilt. Multiple force gauges and dial gauges are used to measure the displacement of the outer ring.
It achieves accurate measurement of bearing radial clearance, uniformly raises the outer ring to avoid tilting, and makes multi-point displacement values more uniform and effective.
Smart Images
Figure CN224316978U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of bearing manufacturing technology and relates to a bearing clearance measuring tool. Background Technology
[0002] In routine bearing inspection and maintenance, it is necessary to periodically measure the radial clearance and axial clearance of the bearing to determine the bearing's usage and wear condition. The axial clearance refers to the maximum difference in axial displacement between the inner and outer rings of the bearing.
[0003] Currently, most bearing axial clearance measuring devices simply press the inner ring of the bearing onto the support structure during the measurement process. For the outer ring, they lift it up by hand or two or three fulcrums and then read the upward displacement of the outer ring using a dial indicator. During this process, the bearing tilts due to the presence of radial clearance, making it difficult to accurately measure the radial clearance value of the bearing. Utility Model Content
[0004] (I) Purpose of the utility model
[0005] The purpose of this invention is to provide a bearing clearance measuring fixture to achieve accurate measurement of the radial clearance value of a bearing.
[0006] (II) Technical Solution
[0007] To solve the above-mentioned technical problems, this utility model provides a bearing clearance measuring fixture, comprising:
[0008] Base;
[0009] The support assembly includes several sets of support members arranged radially around the midpoint of the base, the length of each set of support members being between the inner diameter and the outer diameter of the bearing outer ring, so that the outer ring of the bearing can be partially supported on the support assembly.
[0010] The constraint assembly includes a limiting member disposed on each set of the support members, the limiting member abutting against and constraining the inner wall of the inner ring of the bearing; a limiting pin is threadedly connected to each set of the limiting members, the limiting pin abutting against the upper end face of the inner ring of the bearing;
[0011] A lifting assembly includes a threaded inner sleeve and an outer sleeve, the outer sleeve being disposed on a base and surrounding the support assembly, and the upper end of the threaded inner sleeve abutting against the lower end face of the outer ring of the bearing.
[0012] The measuring assembly includes multiple force gauges and dial indicators, which are respectively threaded onto a set of limiting members and the measuring parts all abut against the upper end face of the outer ring of the bearing.
[0013] Furthermore, the upper end of the limiting member has an extension that extends above the outer ring of the bearing, and the limiting pin, the force gauge, and the dial indicator are all threaded onto the extension.
[0014] Furthermore, each of the limiting members is slidably disposed on the support member; the limiting member has an inner end and an outer end opposite to each other in the sliding direction, wherein the outer end of the limiting member abuts against the inner wall of the inner ring of the bearing.
[0015] Furthermore, the limiting member can be radially slidable or fixed; when the limiting member is fixed, a shim is filled between the limiting member and the bearing inner ring according to the inner diameter of the inner ring, so that the inner ring cannot move radially.
[0016] Furthermore, the measuring fixture also includes an extrusion member that is movable up and down above the center of the base. The extrusion member has a tapered surface that can slide in contact with the inner end of the limiting member, so that the limiting member can be pushed against the inner ring of the bearing by the downward movement of the extrusion member.
[0017] Furthermore, the extruder is provided with a conical or frustum-shaped extrusion section, and the conical surface is the outer side surface of the extrusion section.
[0018] Furthermore, the base is provided with a bracket, and the extrusion member is vertically arranged with its outer wall threadedly connected to the bracket.
[0019] Furthermore, in a top-down view, the projected outline of the bracket on the base is not greater than the inner diameter of the bearing's inner ring.
[0020] Furthermore, the inner end of the limiting member has a wedge-shaped surface that matches the taper of the tapered surface.
[0021] Furthermore, the outer wall of the inner threaded sleeve is provided with a disc-shaped force-applying part to drive the inner threaded sleeve to rotate and rise.
[0022] (III) Beneficial Effects
[0023] The bearing clearance measuring fixture provided by the above technical solution has both the inner and outer rings of the bearing placed on the support assembly, with the inner ring pressed against the support assembly by a limiting pin; while the lifting assembly includes a threaded inner and outer threaded sleeve, with the lower end of the outer outer part supported on the upper end of the inner threaded sleeve. By screwing the inner threaded sleeve, the outer ring can be lifted evenly upwards, and the outer ring is less likely to tilt. The displacement values of each point on the outer ring measured by multiple dial indicators are more uniform and effective. Attached Figure Description
[0024] Figure 1 The three-dimensional bearing clearance measuring fixture of this utility model Figure 1 ;
[0025] Figure 2 The three-dimensional bearing clearance measuring fixture of this utility model Figure 2 ;
[0026] Figure 3 for Figure 2 An enlarged view of part A;
[0027] Icons: 1-Base, 2-Support assembly, 20-Support component, 3-Constraint assembly, 30-Limiting component, 300-Wedge surface, 31-Extension, 310-Limiting pin, 4-Bearing, 40-Inner ring, 41-Outer ring, 5-Extrusion component, 50-Conical surface, 51-Bracket, 6-Measuring assembly, 60-Force gauge, 61-Dial indicator, 7-Lifting assembly, 70-Inner threaded sleeve, 700-Force application part, 71-Outer threaded sleeve. Detailed Implementation
[0028] To make the objectives, contents, and advantages of this utility model clearer, the specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.
[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0030] Reference Figures 1 to 3 This utility model discloses a bearing clearance measuring fixture, including a base 1, a support component 2, a constraint component 3, a lifting component 7, and a measuring component 6.
[0031] The measuring component 6 includes a dial indicator 61. In addition, a force gauge 60 can also be set. The dial indicator 61 can also be replaced with a micrometer according to the measurement accuracy requirements.
[0032] The support component 2 is used to support the bearing 4. It is known that the bearing 4 includes an inner ring 40 and an outer ring 41. The function of the support component 2 is to fully support the inner ring 40 and partially support the outer ring 41 on the support component 2. Specifically, the outline of the support component 2 should be between the inner diameter and the outer diameter of the outer ring 41. When the bearing 4 is placed on the support component 2, the lower part of the outer edge of the outer ring 41 can be suspended.
[0033] In this embodiment, the support assembly 2 includes four sets of support members 20 arranged radially around the midpoint of the base 1. The length of each set of support members 20 is between the inner diameter and the outer diameter of the outer ring 41 of the bearing 4. Figure 3As shown, the outer ring 41 of the bearing 4 can be partially supported on the support member 20.
[0034] The constraint component 3 includes a limiting member 30 provided on each set of support members 20. The function of the limiting member 30 is to press against and constrain the inner wall of the inner ring 40 of the bearing 4. Therefore, the limiting member 30 can be radially sliding or fixed. When a fixed structure is adopted, some inserts can be filled between the limiting member 30 and the inner ring 40 of the bearing 4 according to the inner diameter of the inner ring 40, so that the inner ring 40 cannot move radially.
[0035] In order to prevent the inner ring 30 from moving axially, each set of limiting members 30 is also threaded with a limiting pin 310, the lower end of which can abut against the upper surface of the inner ring 40 of the bearing 4.
[0036] In this embodiment, refer to Figure 1 Each set of limiting members 30 is slidably disposed on the support member 20. The sliding direction of the limiting member 30 is the extension direction of the support member 20, that is, several limiting members 30 can radially expand / contract around the midpoint of the base 1. The limiting member 30 is defined to have a relatively inner end and an outer end in the sliding direction, wherein the outer end of the limiting member 30 abuts against the inner wall of the inner ring 40 of the bearing 4.
[0037] At this time, in order to control the displacement of the limiting component 30, refer to Figure 1 The base 1 is also provided with a bracket 51, and a pressing member 5 is threadedly connected to the bracket 51. The pressing member 5 is vertically downward and has a tapered surface 50 on its outer wall that can slide in contact with the inner end of the limiting member 30. By moving the pressing member 5 downward, the limiting member 30 can be pushed to expand radially outward and press against the inner wall of the inner ring 40 of the bearing 4.
[0038] In this embodiment, refer to Figure 1 The inner end of the limiting member 30 is provided with a wedge-shaped surface 300, and the extruder 5 is provided with a conical or frustum-shaped extrusion part. The conical surface 50 is the outer surface of the extrusion part. During the downward rotation of the extruder 5, the wedge-shaped surface 300 can be squeezed by the extrusion part to continuously push the limiting member 30 to expand radially.
[0039] Reference Figure 1 In this embodiment, the measuring component 6 includes multiple force gauges 60 and dial gauges 61. The upper end of the limiting member 30 has an extension 31 extending to the upper part of the outer ring 41 of the bearing 4. The limiting pin 310, the force gauges 60 and the dial gauges 61 are all threadedly installed on the extension 31. That is, each set of extensions 31 can be provided with a set of force gauges 60 and / or dial gauges 61. The lower ends of the measuring contacts of the force gauges 60 and the dial gauges 61 abut against the upper surface of the outer ring 41.
[0040] Reference Figure 2 and Figure 3The measuring component 7 includes an inner threaded sleeve 70 and an outer threaded sleeve 71 connected by threads. The inner diameter of the inner threaded sleeve 70 is larger than the inner diameter of the outer threaded sleeve 71, and the inner threaded sleeve 70 is threadedly connected to the upper outer wall of the outer threaded sleeve 71. The outer threaded sleeve 71 is disposed on the base 1 around the support component 2, and the upper threaded end of the inner threaded sleeve 70 abuts against the lower end face of the outer ring 41 of the bearing 4. The outer wall of the inner threaded sleeve 70 is provided with a disc-shaped force-applying part 700, which can be used to drive the inner threaded sleeve 70 to rotate and rise.
[0041] Reference Figure 1 In a top-down view, the projected outline of the bracket 51 on the base 1 is no larger than the inner diameter of the inner ring 40 of the bearing 4. Therefore, the bracket 51 will not interfere with the placement of the bearing 4.
[0042] The method of using the bearing clearance measuring fixture of this utility model is as follows:
[0043] The bearing 4 is placed on the support assembly 2, and the inner wall of the inner ring 40 is locked by the limiting member in the constraint assembly 3 to limit the radial movement of the inner ring 40; then the inner ring 40 is pressed down on the support assembly 2 by the limiting pin 310.
[0044] Tighten the force gauge 60 and dial indicator 61 onto the limiting part 30, and continue to tighten them downwards so that the force gauge 60 and dial indicator 61 abut against the upper end face of the outer ring 41 of the bearing 4. At this time, you can judge whether they have abutted against the outer ring 41 by slightly increasing the pointers on the force gauge 60 and dial indicator 61 from zero.
[0045] Then, tighten the inner threaded sleeve 70 to evenly lift the outer ring 41 upwards. When the reading on the force gauge 60 reaches the predetermined pressure value, take the average value of the readings of multiple dial gauges 61. The so-called average value is the axial clearance of the bearing 4.
[0046] During the process, the installation positions of the force gauge 60 and the dial gauge 61 can be swapped on different extensions 31 to obtain more accurate values.
[0047] The above description is only a preferred embodiment of the present utility model. 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 the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.
Claims
1. A bearing clearance measuring fixture, characterized in that, include: Base; The support assembly includes several sets of support members arranged radially around the midpoint of the base, the length of each set of support members being between the inner diameter and the outer diameter of the bearing outer ring, so that the outer ring portion of the bearing is supported on the support assembly; The constraint assembly includes a limiting member disposed on each set of the support members, the limiting member abutting against and constraining the inner wall of the inner ring of the bearing; a limiting pin is threadedly connected to each set of the limiting members, the limiting pin abutting against the upper end face of the inner ring of the bearing; A lifting assembly includes a threaded inner sleeve and an outer sleeve, the outer sleeve being disposed on a base and surrounding the support assembly, and the upper end of the threaded inner sleeve abutting against the lower end face of the outer ring of the bearing. The measuring assembly includes multiple force gauges and dial indicators, which are respectively threaded onto a set of limiting members and the measuring parts all abut against the upper end face of the outer ring of the bearing.
2. The bearing clearance measuring fixture as described in claim 1, characterized in that, The upper end of the limiting member has an extension that extends above the outer ring of the bearing, and the limiting pin, the force gauge, and the dial indicator are all threaded onto the extension.
3. The bearing clearance measuring fixture as described in claim 2, characterized in that, Each of the aforementioned limiting members is slidably disposed on the support member; the limiting member has an inner end and an outer end opposite to each other in the sliding direction, and the outer end of the limiting member abuts against the inner wall of the inner ring of the bearing.
4. The bearing clearance measuring fixture as described in claim 3, characterized in that, The limiting member can be radially slidable or fixed. When the limiting member is fixed, inserts are filled between the limiting member and the bearing inner ring according to the inner diameter of the inner ring, so that the inner ring cannot move radially.
5. The bearing clearance measuring fixture as described in claim 4, characterized in that, It also includes an extrusion member that is movably disposed above the center of the base. The extrusion member has a tapered surface that can slide in contact with the inner end of the limiting member, so that the limiting member can be pushed against the inner ring of the bearing by the downward movement of the extrusion member.
6. The bearing clearance measuring fixture as described in claim 5, characterized in that, The extruder is provided with a conical or frustum-shaped extrusion section, and the conical surface is the outer side surface of the extrusion section.
7. The bearing clearance measuring fixture as described in claim 6, characterized in that, The base is provided with a bracket, and the extrusion member is vertically arranged with its outer wall threadedly connected to the bracket.
8. The bearing clearance measuring fixture as described in claim 7, characterized in that, In a top-down view, the projected outline of the bracket on the base is no larger than the inner diameter of the bearing's inner ring.
9. The bearing clearance measuring fixture as described in claim 8, characterized in that, The inner end of the limiting member has a wedge-shaped surface that matches the taper of the tapered surface.
10. The bearing clearance measuring fixture as described in claim 9, characterized in that, The outer wall of the inner threaded sleeve is provided with a disc-shaped force-applying part, which is used to drive the inner threaded sleeve to rotate and rise.