Bearing axial clearance measuring tool

Abstract

The utility model relates to a bearing axial clearance measuring tool which comprises a bottom plate, a pushing mechanism, a limiting mechanism and a measuring meter, a left fixing plate and a right fixing plate are arranged on two sides of the bottom plate, and the pushing mechanism comprises a pair of supporting rods which are fixed between the left fixing plate and the right fixing plate in parallel. A left spring pressing block and a right spring pressing block which slide in a pair are arranged on the supporting rods, a spring is arranged between the left spring pressing block and the right spring pressing block, the left fixing plate is in threaded connection with a threaded rod with a handle, the end of the threaded rod abuts against the left spring pressing block, and a ruler is fixedly arranged on the left side of the right spring pressing block. The right side of the right spring pressing block is provided with an inner ring abutting block abutting against the end face of a bearing inner ring at one end of the to-be-measured bearing and a measuring rod axially penetrating through the bearing inner ring and extending out of the right fixing plate, and the inner side of the right fixing plate is fixedly provided with an outer ring abutting block abutting against the end face of an outer ring at the other end of the to-be-measured bearing. A measuring meter with a measuring head opposite to the measuring rod is fixedly arranged on the outer side of the right fixing plate. The axial clearance of the bearing can be measured conveniently, accurately and efficiently.

Description

Technical Field

[0001] The utility model relates to the field of bearing detection and is a bearing axial clearance measuring tool. Background Art

[0002] Bearing clearance refers to the amount of movement when one of the inner or outer rings of a bearing is fixed while the other is allowed to move radially or axially before the bearing is installed on the shaft or bearing housing. According to the direction of movement, it can be divided into radial clearance and axial clearance. Clearance has a great influence on the working stability of the bearing. Therefore, before leaving the factory, the bearing clearance needs to be measured and detected to ensure the qualified rate. The existing solutions for detecting the axial clearance of bearings, such as the utility model patent document published with the authorization announcement number CN217738133U, the authorization announcement date of November 4, 2022, and the utility model name of "a bearing axial clearance detection device", which includes a base, an instrument rack, a dial indicator, and a bearing positioning member. A positioning seat is fixed on one side of the top of the base. The instrument rack includes a set of vertical plates, a cross beam, and a swing arm. The set of vertical plates is fixed on the other side of the top of the base. One end of the swing arm is rotatably connected to the set of vertical plates through a shaft body. One end of the cross beam is fixed to the other end of the swing arm. A through hole is opened on the cross beam. A fastening screw is provided at one end of the cross beam away from the swing arm. The dial indicator is fixed in the through hole through the fastening screw. The bearing positioning member includes a standard base, a lower seat body, and a gland. The lower seat body is fixed on the top of the standard base. The above structure can realize the detection of the axial clearance of the bearing, but during the detection process, it is necessary to manually press the dial indicator, and it is difficult to grasp the pressing force, which ultimately affects the accuracy of the test results. Therefore, it is necessary to improve the existing bearing axial clearance detection device. Summary of the Invention

[0003] To overcome the above deficiencies, the purpose of the present utility model is to provide a bearing axial clearance measuring tool to the field, so as to solve the technical problems that the existing similar bearing axial clearance detection tools have a relatively complex structure and poor stability of manual force application, resulting in poor measurement accuracy. Its purpose is achieved through the following technical solutions.

[0004] An axial clearance measuring tool for bearings, which includes a base plate, a pushing mechanism, a limiting mechanism, and a measuring gauge. The key structural points are that left and right fixing plates are provided on both sides of the base plate. The pushing mechanism includes a pair of parallel support rods, and both ends of the support rods are fixed between the left and right fixing plates. A pair of sliding left and right spring pressing blocks are arranged on the pair of support rods, and springs are sleeved in each support rod and are limited between the left and right spring pressing blocks. The left fixing plate is threadedly connected to a screw rod with a handle, and the end of the screw rod abuts against the left spring pressing block. When the screw rod is rotated, the screw rod pushes the left spring pressing block to slide relative to the support rod. A scale is fixedly provided on the left side of the right spring pressing block and extends to the left fixed pressing block and is used to indicate the change in the relative distance between the left and right spring pressing blocks. An inner ring pressing block that abuts against the end face of the inner ring of one end of the bearing to be measured is provided on the right side of the right spring pressing block, and a measuring rod axially passes through the inner ring of the bearing and extends out from the right fixing plate. An outer ring pressing block that abuts against the end face of the outer ring of the other end of the bearing to be measured is fixedly provided on the inner side of the right fixing plate. A measuring gauge is fixedly provided on the outer side of the right fixing plate, and the measuring head of the measuring gauge faces the measuring rod. When the inner ring pressing block and the outer ring pressing block clamp the bearing to be measured with the minimum clamping force, the measuring head of the measuring gauge abuts against the end face of the measuring rod to form a zero position. Through the above structure, when measuring the axial clearance of the bearing, the overall axial force application is relatively stable, the measurement accuracy is high, and when measuring, the bearing is relatively easy to install. Just manually pull the right spring pressing block, and the bearing can be easily placed and clamped. The measurement is relatively convenient and efficient.

[0005] The scale is provided with a scale sliding groove along the length measurement direction, and an indicating block that forms a sliding fit with the scale sliding groove is provided on the top of the left spring pressing block. Through this structure, it is convenient to visually display the intensity of the axial force application, thereby ensuring the accuracy of the measurement result.

[0006] The inner ring pressing block includes two adjusting blocks that are in a sliding fit with respect to the right spring pressing block, and the sliding direction is perpendicular to the axial direction of the two side support rods. When the adjusting blocks slide in place, they are locked and fixed through an external locking bolt passing through the adjusting sliding holes of the right spring pressing block and the adjusting blocks. The two adjusting sliders are respectively provided with outwardly protruding fulcrums, and the two fulcrums form an abutting support with the symmetric positions of the end face of the inner ring of one end of the bearing to be measured. Through this structure, it is convenient to adapt to the measurement of the axial clearance of bearings with different inner ring sizes.

[0007] The outer ring pressing block includes a disc seat. At least three pressing blocks are arranged in an annular array along the end face of the disc seat, and the pressing blocks form a radial sliding fit relative to the disc seat. That is, radial sliding holes corresponding to the sliding of the pressing blocks are provided on the front face of the disc seat, and bolt sliding holes communicating with each other are provided on the back face of the disc seat. The pressing blocks are limited in the radial sliding holes by bolts connecting the back face of the disc seat. The bolts are limited in the bolt sliding holes on the back face of the disc seat. The pressing blocks are provided with bolt holes for connecting the bolts, and one end of the bolt facing the bolt hole is provided with a screwing operation port. That is, when the bolt is screwed and locked, the pressing blocks are locked relative to the disc seat. The back face of the disc seat and the right fixing plate are locked and fixed by bolt members. With this structure, it is convenient to adapt to the measurement of the axial clearance of bearings with different outer ring sizes.

[0008] A bracket for connecting a measuring gauge is fixedly provided on the outside of the right fixing plate, and the bracket is provided with a clamping opening that forms a sliding plug-in connection with the rod portion of the measuring gauge. The sliding plug-in direction is the direction in which the measuring head of the measuring gauge abuts against the measuring rod. A pair of clamping bolts for deforming and clamping the rod portion of the measuring gauge are provided at the clamping opening. With this structure, it is convenient to adjust the position of the measuring gauge to achieve a zeroing operation and meet the requirements for measuring the axial clearance of the bearing.

[0009] The measuring gauge is a dial indicator or a micrometer. With this structure, the corresponding measuring gauge can be selected according to actual needs.

[0010] Sliding sleeves are provided in the sliding holes where the left spring pressing block and the right spring pressing block slide relative to the support rod. With this structure, the sliding effect and service life are improved.

[0011] The overall structure of the present utility model is relatively simple, which is easy for the rapid assembly of bearings to measure the clearance under different axial forces. The measurement is relatively accurate, reliable, and efficient, and it is suitable for use as a measuring tool for the axial clearance of various bearings or the improvement of the structure of similar tools. Description of the Drawings

[0012] Figure 1 is a three-dimensional structural schematic diagram of the present utility model in the use state.

[0013] Figure 2 is Figure 1 the planar structural schematic diagram of

[0014] Figure 3 is Figure 1 the partial structural schematic diagram in

[0015] Figure 4 is Figure 1 the exploded structural schematic diagram of the outer ring pressing block in

[0016] Figure 5 is Figure 4 the structural schematic diagram from another perspective of

[0017] Figure 6 Yes Figure 1 Schematic diagram of the structure for connecting the measuring gauge and the bracket in the figure.

[0018] The serial numbers and names in the figure are as follows: 1. Bottom plate, 2. Left fixing plate, 3. Right fixing plate, 4. Screw rod, 5. Strut, 6. Left spring pressing block, 601. Indicator block, 7. Right spring pressing block, 701. Adjusting sliding hole, 8. Spring, 9. Scale, 901. Scale sliding groove, 10. Inner ring pressing block, 1001. Adjusting block, 1002. Fulcrum, 11. Bearing to be measured, 12. Outer ring pressing block, 1201. Disc seat, 1202. Pressing block, 1203. Bolt hole, 1204. Radial sliding groove, 1205. Bolt, 1206. Bolt sliding hole, 13. Measuring rod, 14. Sleeve, 15. Bracket, 1501. Clamping opening, 16. Measuring gauge, 1601. Measuring head, 17. Clamping bolt. Embodiment

[0019] Now, in combination with the attached drawings, the present utility model will be further described.

[0020] As Figure 1 , Figure 2 shown, this bearing axial clearance measuring tool includes a bottom plate 1, a pushing mechanism, a limiting mechanism, and a measuring gauge 16. Left and right fixing plates 2 and 3 are provided on both sides of the bottom plate. The pushing mechanism includes a pair of parallel struts 5, and both ends of the struts are fixed between the left and right fixing plates. A pair of sliding left and right spring pressing blocks 6 and 7 are arranged on this pair of struts. The left and right spring pressing blocks are both in sliding fit with the struts through sleeves 14. A spring 8 limited between the left and right spring pressing blocks is sleeved in each strut. The left fixing plate is vertically threadedly connected to a screw rod 4 with a handle, and the end of the screw rod abuts against the end face of the left spring pressing block. That is, when the screw rod is rotated, the screw rod pushes the left spring pressing block to slide relative to the strut and compress the spring. A scale 9 for indicating the change in the relative distance between the left and right spring pressing blocks is fixedly provided on the left side of the right spring pressing block and extends to the left spring pressing block. The scale is provided with a scale sliding groove 901, and an indicator block 601 that forms a sliding fit with the scale sliding groove is provided on the top of the left spring pressing block. The value of the current scale sliding groove is indicated by the indicator block to represent the force application degree. An inner ring pressing block 10 that abuts against the end face of the inner ring of one end of the bearing to be measured 11 is provided on the right side of the right spring pressing block, and a measuring rod 13 that axially passes through the inner ring of the bearing to be measured and extends out from the right fixing plate. An outer ring pressing block 12 that abuts against the end face of the outer ring of the other end of the bearing to be measured is fixedly provided on the inner side of the right fixing plate. The measuring gauge is fixedly connected to the right fixing plate through a bracket 15. The measuring head 1601 of the measuring gauge faces the measuring rod, and when the inner ring pressing block and the outer ring pressing block clamp the bearing to be measured with the minimum clamping force, the measuring head of the measuring gauge abuts against the end face of the measuring rod to form a zero position.

[0021] As Figure 3As shown, the above-mentioned inner ring pressing block 10 includes two adjusting blocks 1001 that are slidably engaged with respect to the right spring pressing block 7. The sliding direction is perpendicular to the axial direction of the two side struts 5. When the adjusting blocks slide in place, they are locked and fixed by an external locking bolt passing through the adjusting slide hole 701 of the right spring pressing block and the adjusting blocks. Each of the two adjusting sliders is provided with a protruding fulcrum 1002, and the two fulcrums form a supporting contact with the symmetric positions of the inner ring end face of one end of the bearing 11 to be measured.

[0022] As Figure 4 , Figure 5 shown, the above-mentioned outer ring pressing block 12 includes a disc seat 1201. The disc seat is provided with at least three pressing blocks 1202 arranged in an annular array along the end face. The pressing blocks form a radial sliding fit with respect to the disc seat, that is, the front face of the disc seat is provided with radial slide holes 1204 corresponding to the sliding of the pressing blocks, and the back face of the disc seat is provided with communicating bolt slide holes 1206. The pressing blocks are limited in the radial slide holes by bolts 1205 connecting the back face of the disc seat. The bolts are limited in the bolt slide holes on the back face of the disc seat. The pressing blocks are provided with bolt holes 1203 for connecting the bolts, and one end of the bolt facing the bolt hole is provided with a screwing operation port. That is, by inserting an external tool into the bolt hole to operate the screwing operation port to drive the bolt to rotate, the pressing block is locked or loosened with respect to the disc seat; the back face of the disc seat is locked and fixed to the right fixing plate 3 by bolt members.

[0023] As Figure 2 , Figure 6 shown, the bracket 15 connecting the measuring gauge 16 is provided with a clamping port 1501 that forms a sliding plug-in connection with the rod part of the measuring gauge. The sliding plug-in direction is the direction in which the measuring head of the measuring gauge abuts against the measuring rod. A pair of clamping bolts 17 for deforming and clamping the rod part of the measuring gauge are provided at the clamping port. When the clamping bolts are loosened, it is convenient to adjust the axial position of the measuring gauge. The above-mentioned measuring gauge is a dial gauge or a micrometer.

[0024] The usage method of the bearing axial clearance measuring tool is as follows: First, rotate the screw rod 4 with a handle to make the indicating block of the left spring pressing block correspond to the zero position of the scale sliding groove on the scale; then manually pull the right spring pressing block 7 to compress the spring 8, and place the bearing 11 to be measured between the inner ring clamping block 10 of the right spring pressing block and the outer ring clamping block 12 of the right fixing plate 3. Under the initial force of the spring, the inner ring clamping block and the outer ring clamping block form a minimum force clamping on the inner ring and the outer ring of the bearing 11 to be measured, and the measuring rod 13 of the right spring pressing block extends from the middle of the bearing 11 to be measured to the right fixing plate 3. Adjust the fixed position of the measuring gauge 16 relative to the bracket 15 to make the measuring head 1601 of the measuring gauge contact the end of the side rod, and rotate the dial of the measuring gauge to zero the measuring gauge; Next, manually screw the screw rod with a handle to make the screw rod push the left spring pressing block to compress the spring for axial force application. The right spring pressing block pushes the inner ring clamping block to clamp the inner ring of the bearing 11 to be measured under the action of the spring to form axial force application. The measuring rod of the right spring pressing block pushes the measuring head of the measuring gauge, and the measuring gauge displays the clearance value under the current axial force. During the above force application process, by observing the position of the indicating block of the left spring pressing block on the scale sliding groove, the axial force corresponding to the corresponding value is indicated, and the measuring gauge displays the clearance value under the current axial force state, that is, the measurement of the bearing axial clearance is completed.

[0025] The above content is intended to illustrate the technical means of the present invention and does not limit the technical scope of the present invention. Obvious improvements or replacements made by those skilled in the art in combination with the existing common general knowledge to the present invention also fall within the protection scope of the claims of the present invention.

Claims

1. A bearing axial clearance measuring tool, which comprises a base plate (1), a pushing mechanism, a limiting mechanism, and a measuring gauge (16), and is characterized in that On both sides of the bottom plate (1), there are a left fixing plate (2) and a right fixing plate (3). The pushing mechanism includes a pair of parallel support rods (5), and both ends of the support rods are fixed between the left fixing plate and the right fixing plate. A pair of sliding left spring pressing blocks (6) and right spring pressing blocks (7) are arranged on the pair of support rods. A spring (8) limited between the left spring pressing block and the right spring pressing block is sleeved in each support rod. The left fixing plate is threadedly connected with a screw rod (4) with a handle, and the end of the screw rod abuts against the left spring pressing block. When the screw rod is rotated, the screw rod pushes the left spring pressing block to slide relative to the support rod. On the left side of the right spring pressing block, there is a scale (9) extending to the left fixing block and used to indicate the change in the relative distance between the left spring pressing block and the right spring pressing block. On the right side of the right spring pressing block, there is an inner ring tightening block (10) abutting against the end face of the inner ring of one end of the bearing to be measured, and a measuring rod (13) axially passing through the inner ring of the bearing and extending out from the right fixing plate. On the inner side of the right fixing plate, there is an outer ring tightening block (12) abutting against the end face of the outer ring of the other end of the bearing to be measured. On the outer side of the right fixing plate, the measuring gauge (16) is fixed. The measuring head (1601) of the measuring gauge faces the measuring rod, and when the inner ring tightening block and the outer ring tightening block clamp the bearing to be measured (11) with the minimum clamping force, the measuring head of the measuring gauge abuts against the end face of the measuring rod to form a zero position.

2. The bearing axial clearance measuring tool according to claim 1, characterized in that The scale (9) is provided with a scale sliding groove (901) along the length measurement direction. On the top of the left spring pressing block (6), there is an indicating block (601) forming a sliding fit with the scale sliding groove.

3. The bearing axial clearance measuring tool according to claim 1, wherein The inner ring tightening block (10) includes two adjusting blocks (1001) forming a sliding fit with respect to the right spring pressing block (7). The sliding direction is perpendicular to the axial direction of the two side support rods (5). When the adjusting blocks slide in place, they are locked and fixed through the adjusting sliding holes (701) of the right spring pressing block by external locking bolts. The two adjusting sliders are respectively provided with protruding fulcrums (1002), and the two fulcrums form abutting supports with the symmetric positions of the end face of the inner ring of one end of the bearing to be measured (11).

4. The bearing axial clearance measuring tool according to claim 1, characterized in that The outer ring tightening block (12) includes a disc seat (1201). Along the end face, at least three tightening blocks (1202) are annularly arranged on the disc seat. The tightening blocks form a radial sliding fit with respect to the disc seat, that is, on the front surface of the disc seat, there are radial sliding holes (1204) corresponding to the sliding of the tightening blocks. On the back surface of the disc seat, there are communicating bolt sliding holes (1206). The tightening blocks are limited in the radial sliding holes through bolts (1205) connecting the back surface of the disc seat. The bolts are limited in the bolt sliding holes on the back surface of the disc seat. The tightening blocks are provided with bolt holes (1203) connecting the bolts, and one end of the bolt facing the bolt hole is provided with a screwing operation port. That is, when the bolt is tightened by screwing, the tightening block is locked with respect to the disc seat. The back surface of the disc seat is locked and fixed with the right fixing plate (3) through bolt parts.

5. The bearing axial clearance measuring tool according to claim 1, characterized in that A bracket (15) for connecting a measuring gauge (16) is fixedly arranged on the outer side of the right fixing plate (3). The bracket is provided with a clamping opening (1501) that forms a sliding insertion connection with the rod part of the measuring gauge. The sliding insertion direction is the direction in which the measuring head (1601) of the measuring gauge abuts against the measuring rod (13). A pair of clamping bolts (17) for deforming the clamping opening to clamp the rod part of the measuring gauge are arranged at the clamping opening.

6. The bearing axial clearance measuring tool according to claim 1, wherein The measuring gauge (16) is a dial indicator or a micrometer.

7. The bearing axial clearance measuring tool according to claim 1, characterized in that A sliding sleeve (14) is arranged in the sliding holes where the left spring pressing block (6) and the right spring pressing block (7) slide relative to the support rod (5).

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