Bearing radial clearance measuring device

Abstract

The utility model discloses a device for measuring the radial clearance of a bearing. The device comprises a base assembly, a pressing assembly, a loading assembly and a measuring assembly, the base assembly is provided with a plane for placing a bearing; the pressing assembly is used for fixing an inner ring of the bearing; the loading assembly is arranged on the base assembly and is used for applying a radial load to the outer ring of the bearing; the measuring assembly is arranged on the base assembly and used for measuring the radial displacement of the outer ring of the bearing; the pressing assembly comprises a moving piece with the axis perpendicular to the plane and a plurality of extrusion pieces capable of moving in the radial direction around the axis of the moving piece. The moving part is provided with an extrusion part with the outer diameter changing in the axial direction, and the multiple extrusion parts abut against the extrusion part so as to push the multiple extrusion parts to be unfolded and pressed on the inner wall of the inner ring of the bearing. When the bearing radial clearance measuring device is used, axial extrusion on a bearing inner ring can be avoided, damage to the bearing inner ring is avoided, and interference of radial clearance measurement accuracy caused by axial clearance can be avoided.

Description

Technical Field

[0001] The utility model relates to the field of bearings, and in particular to a bearing radial clearance measuring device. Background Art

[0002] When repairing a reducer transmission device, the process requires measuring the radial clearance of the device's ball bearings to see if they are qualified. The measurement method is to fix the inner ring of the bearing in a horizontal state and apply force to the outer ring in the radial direction. This force causes the outer ring to displace, and this displacement is the radial clearance that needs to be measured.

[0003] Patent application CN117470067A discloses an automatic bearing measuring device and method. In the device, a set of axially variable diameter compression blocks are used to squeeze the inner ring of the bearing downward to fix the bearing, and then a measuring component acts on the outer ring of the bearing to measure the radial displacement of the outer ring. During measurement, the device is more compatible with bearings of different inner diameters. However, the contact area between the tapered extrusion block and the inner ring of the bearing is close to line contact, and the upper inner wall of the inner ring of the bearing is easily damaged by the extrusion force. In addition, the downward force component easily causes the inner ring of the bearing to produce axial clearance downward, which interferes with the measurement accuracy of the radial clearance. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the background technology and provide a bearing radial clearance measuring device.

[0005] The embodiments of the present invention are achieved through the following technical solutions:

[0006] A bearing radial clearance measuring device comprises a base assembly, a pressing assembly, a loading assembly and a measuring assembly;

[0007] The base assembly is provided with a flat surface for placing the bearing;

[0008] The clamping assembly is used to fix the inner ring of the bearing;

[0009] The loading assembly is provided on the base assembly and is used to apply a radial load to the outer ring of the bearing;

[0010] The measuring assembly is provided on the base assembly and is used to measure the radial displacement of the outer ring of the bearing;

[0011] The clamping assembly includes a moving part whose axis is perpendicular to the plane, and a plurality of extrusion parts that can move radially around the axis of the moving part; the moving part has an extrusion portion with a changing outer diameter in the axial direction, and the plurality of extrusion parts are all against the extrusion portion to push the plurality of extrusion parts to expand and press them on the inner wall of the inner ring of the bearing.

[0012] Furthermore, the extrusion portion is in a cone or frustum shape.

[0013] Furthermore, in the axial direction of the moving member, the end portion of the moving member is threadedly connected to the base assembly.

[0014] Furthermore, the extrusion portion is a prism structure, and the number of side surfaces of the prism is equal to the number of extrusion members in the pressing assembly, and each group of extrusion members is offset against a group of side surfaces of the prism.

[0015] Furthermore, the pressing assembly further comprises a plurality of guide rails provided on the base assembly, and the extrusion member is a slider slidably connected to the guide rails.

[0016] Furthermore, a limiting portion for limiting the extrusion member from sliding out is provided at the end of the guide rail.

[0017] Furthermore, the end of the extrusion piece also has a wedge-shaped surface that matches the taper of the extrusion portion.

[0018] Furthermore, the first end of the extrusion piece abuts against the extrusion portion, and the second end of the extrusion piece is threadedly connected to a group of pins for pressing the inner ring end surface of the bearing.

[0019] Furthermore, the loading assembly includes a set of loading heads, and the loading heads can be threadedly connected to the base assembly in a radially advancing / retreating manner.

[0020] Furthermore, the measuring assembly also includes a force sensor for measuring the radial load of the outer ring of the bearing.

[0021] The technical solution of the embodiment of the utility model has at least the following advantages and beneficial effects:

[0022] In the bearing radial clearance measuring device of the present invention, a plurality of radially slidable extrusion parts are arranged on the circumferential side of the moving part, and the extrusion part of the moving part drives the plurality of extrusion parts to press against and fix the inner ring of the bearing. This can avoid the direct action of the extrusion part on the bearing to cause damage to the inner ring, and can also avoid the generation of axial component force, thereby avoiding interference with the accuracy of radial clearance measurement due to the generation of axial clearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of the bearing radial clearance measuring device of the present invention when the loading component and the measuring component are removed;

[0024] Figure 2 This is a diagram of the bearing radial clearance measuring device of the present invention in use;

[0025] Figure 3 for Figure 2 An enlarged view of part A;

[0026] Icons: 1-base assembly, 10-plane, 11-leveling mechanism, 12-guide rail, 120-limiting part, 13-limiting seat, 2-clamping assembly, 20-extrusion part, 200-head, 201-wedge surface, 21-moving part, 210-extrusion part, 3-loading assembly, 4-measuring assembly, 40-force sensor, 41-display, 42-distance measuring device, 5-bearing, 50-inner ring, 51-outer ring. DETAILED DESCRIPTION

[0027] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Reference Figures 1 to 3 The utility model discloses a bearing radial clearance measuring device, which can measure the radial clearance of bearings of various sizes, especially the radial clearance measurement of large bearings; the bearing radial clearance measuring device includes a base assembly 1, a clamping assembly 2, a loading assembly 3 and a measuring assembly 4.

[0029] Among them, reference Figure 1 and Figure 2 The base assembly 1 is used to support the entire measuring equipment, including a base plate and a leveling mechanism 11. The so-called leveling mechanism 11 refers to a plurality of structures that can be adjusted up and down, such as screws or studs, which are arranged at different positions at the lower end of the base plate. By screwing the screws / studs, the base plate can be kept level.

[0030] The upper end surface of the base plate is used to support the entire measuring device. In this embodiment, a guide rail 12 is provided on the upper end surface of the base plate, wherein the guide rail 12 plays a guiding role in the clamping assembly 2, which will be discussed in detail later; here, the guide rail 12 also plays a supporting and placement role for the bearing 5, that is, the upper end surface of the guide rail 12 is a set of planes for placing the bearing 5.

[0031] The clamping assembly 2 is used to clamp the inner ring 50 of the fixed bearing 5, refer to Figures 1 to 3 , wherein the clamping assembly 2 includes a moving part 21 whose axis is perpendicular to the plane 10, and a plurality of extrusion parts 20 that can move radially around the axis of the moving part 21. The plurality of extrusion parts 20 are evenly arranged around the axis of the moving part 21 so that all the extrusion parts 20 can act evenly on the inner wall of the inner ring 50. In this embodiment, there are four groups of extrusion parts 20.

[0032] Reference Figure 1The moving part 21 has an extrusion portion 210 with a changing outer diameter in the axial direction. When the clamping assembly 2 is working, several extrusion parts 20 are in contact with the extrusion part 210. As the outer diameter of the moving part 21 in contact with the extrusion part 20 gradually increases, the extrusion part 20 can be pushed to expand outward in the radial direction to rest on the inner wall of the inner ring 50, which is compatible with bearings 5 ​​of different sizes.

[0033] Therefore, it is easy to understand that the extrusion portion 210 can be conical or truncated cone-shaped. At this time, the lower end of the movable member 21 can be threadedly connected to the base assembly 1, and the axial movement of the movable member 21 can be promoted by screwing the movable member 21; therefore, optionally, a limiting member 13 is also provided on the bottom plate of the base assembly 1, which can be threadedly connected to the lower end of the movable member 21.

[0034] In one embodiment, the extrusion portion 210 can be a prism structure, and the number of sides of the prism is equal to the number of extrusion members 20 in the clamping assembly 2, that is, when there are four groups of extrusion members 20, the extrusion portion 210 can be a quadrangular pyramid structure, and the extrusion portion 210 has four groups of sides, and each group of extrusion members 20 is against a group of sides of the prism; at this time, the extrusion portion 210 only needs to move along the axial direction of the moving part 21 and does not need to rotate. Accordingly, a threaded portion can be set at the lower end of the moving part 21, and the threaded portion can pass through the bottom plate of the base assembly 1, and a nut can be set on the threaded portion of the moving part 21 below the bottom plate, and the nut can be screwed to make the moving part 21 move axially.

[0035] Reference Figure 1 and Figure 2 In this embodiment, the extrusion member 20 is a slider that is slidably connected to the guide rail 12. In the radial direction, the inner end of the slider is against the extrusion portion 210 of the moving member 21. Therefore, the inner end of the extrusion member 20 also has a wedge surface 201 that matches the taper of the extrusion portion 210. The outer end of the extrusion member 20 is a plane that is against the inner wall of the inner ring 50 or an arc surface perpendicular to the axis.

[0036] Reference Figure 1 The outer end of the guide rail 12 is further provided with a limiting portion 120 for limiting the extrusion member 20 from sliding out. In this embodiment, the limiting portion 120 adopts a limiting pin structure.

[0037] Reference Figure 3 The outer end of the extrusion piece 20 is also threadedly connected to a group of plugs 200 for pressing the end face of the inner ring 50 of the bearing 5, and the plugs 200 are vertically downward against the upper end face of the inner ring 50.

[0038] The loading assembly 3 and the measuring assembly 4 are both arranged on the base assembly 1 to apply a radial load to the outer ring 51 of the bearing 5 and measure the radial displacement of the outer ring 51 of the bearing 5 .

[0039] Specifically, refer to Figure 3A loading head is provided in the loading assembly 3 to push against the outer wall of the outer ring 51 to eliminate the radial clearance of one side of the bearing 5 and ensure the accuracy of the measured value. The measuring assembly 4 is composed of a force sensor 40, a display 41 (such as a handheld measuring digital display) and a distance measuring device 42.

[0040] Accordingly, in this embodiment, the base assembly 1 should also be provided with a mounting seat assembly for mounting the loading assembly 3 and the measuring assembly 4 .

[0041] The loading head can be threadedly connected to the mounting seat assembly by being screwed in / out radially. When in use, the loading head is rotated right until it contacts the outer ring 51 of the measuring bearing 5. At this time, the load displayed on the display 41 is zero. The adjusting screw is continued to be rotated to generate a tensile force on the force sensor. This tensile force is the pressure loaded on the outer ring 51 of the bearing 5, and the force size is synchronously displayed on the display 41. When the force displayed on the display 41 reaches the required value, the loading is stopped. At this time, the value displayed on the distance measuring device 42 (such as a dial indicator or micrometer) is the radial clearance value, which can achieve the elimination of the radial clearance of one side of the bearing 5 under the specified force.

[0042] In addition, it is easy to understand that the loading component 3 and the measuring component 4 can be equipped with a data output interface, which can be connected to a computer printer. Through the corresponding coding program, a change curve of the load and radial clearance value can be formed, which can intuitively show the influence of the load size on the radial clearance of the bearing; therefore, the clearance measuring device can realize the precise measurement of the radial clearance of large bearings while also realizing digital measurement to meet market demand.

[0043] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A bearing radial clearance measuring device, comprising a base assembly, a clamping assembly, a loading assembly, and a measuring assembly; The base assembly is provided with a flat surface for placing the bearing; The clamping assembly is used to fix the inner ring of the bearing; The loading assembly is provided on the base assembly and is used to apply a radial load to the outer ring of the bearing; The measuring assembly is provided on the base assembly and is used to measure the radial displacement of the outer ring of the bearing; and is characterized in that: The clamping assembly includes a moving part whose axis is perpendicular to the plane, and a plurality of extrusion parts that can move radially around the axis of the moving part; the moving part has an extrusion portion with a changing outer diameter in the axial direction, and the plurality of extrusion parts are all against the extrusion portion to push the plurality of extrusion parts to expand and press them on the inner wall of the inner ring of the bearing.

2. The bearing radial clearance measuring device according to claim 1, characterized in that: The extrusion portion is in a cone shape or a truncated cone shape.

3. The bearing radial clearance measuring device according to claim 2, characterized in that: In the axial direction of the moving member, the end portion of the moving member is threadedly connected to the base assembly.

4. The bearing radial clearance measuring device according to claim 1, characterized in that: The extrusion portion is a prism structure, and the number of side faces of the prism is equal to the number of extrusion members in the pressing assembly, and each group of extrusion members is offset against a group of side faces of the prism.

5. The bearing radial clearance measuring device according to claim 1, characterized in that: The pressing assembly further comprises a plurality of guide rails arranged on the base assembly, and the extruding member is a slider slidably connected to the guide rails.

6. The bearing radial clearance measuring device according to claim 5, characterized in that: The end of the guide rail is further provided with a limiting portion for limiting the extrusion member from sliding out.

7. The bearing radial clearance measuring device according to any one of claims 1 to 6, characterized in that: The end of the extrusion piece also has a wedge-shaped surface that matches the taper of the extrusion portion.

8. The bearing radial clearance measuring device according to any one of claims 1 to 6, characterized in that: The first end of the extrusion piece abuts against the extrusion portion, and the second end of the extrusion piece is threadedly connected with a group of heads for pressing the inner ring end surface of the bearing.

9. The bearing radial clearance measuring device according to any one of claims 1 to 6, characterized in that: The loading assembly includes a group of loading heads, and the loading heads can be threadedly connected to the base assembly in a radially advancing / retreating manner.

10. The bearing radial clearance measuring device according to any one of claims 1 to 6, characterized in that: The measuring assembly further comprises a load cell for measuring the radial load of the outer ring of the bearing.

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