Controllable device for axial clearance of bearing of high-speed shaft of gearbox
By installing elastic parts between the outer rings of the gearbox high-speed shaft bearings and combining the design of the convex ring and through-holes, the problems of inconvenient adjustment of bearing clearance and early failure of bearings are solved, uniform preloading and efficient assembly of bearings are achieved, and the service life of the gearbox is extended.
Patent Information
- Application Number
- CN202421994451.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-16
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-08-16
AI Technical Summary
During assembly and use of gearbox high-speed shaft bearings, the bearing clearance adjustment is inconvenient and can easily lead to early failure of the bearing or noise and vibration, shortening the life of the gearbox.
A controllable device for axial clearance of the gearbox high-speed shaft bearing is designed. By installing multiple elastic parts between the outer rings of the bearing, and a convex ring and a through hole are provided on the inner wall of the bearing seat. The ends of the elastic parts are abutted against the outer ring and the convex ring of the bearing respectively to ensure that the bearing uniformly bears axial force during operation.
It achieves uniform axial preloading force of the bearing, convenient adjustment and high accuracy, extends the service life of the gear box and improves assembly efficiency.
Smart Images
Figure CN222848561U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of gear boxes, in particular to a controllable device for the axial clearance of a high-speed shaft bearing of a gear box. Background Art
[0002] During the gearbox assembly process, one of the very important steps is to adjust the axial clearance of the bearing. If the bearing clearance is too small, it will cause the bearing to heat up and expand during operation, and in severe cases, it will cause the bearing to fail prematurely; if the bearing clearance is too large, the bearing will move axially during operation, generating noise and vibration, which will greatly shorten the life of the gearbox.
[0003] When the gearbox is working, a certain axial force will be generated. At this time, the rolling bearings used in pairs are all single bearings that bear the axial force, and the other bearing does not bear the axial force. In the case of instantaneous overload impact, the rolling element of the bearing that is not subject to the axial force will instantly impact its cage, causing damage to the cage. Summary of the invention
[0004] In view of the above problems existing in the existing gearbox high-speed shaft bearing structure, it is now intended to provide a controllable device for the axial clearance of the gearbox high-speed shaft bearing.
[0005] The specific technical solutions are as follows:
[0006] A controllable device for the axial clearance of a high-speed shaft bearing of a gearbox, comprising: a high-speed shaft, a bearing seat and two bearings, wherein the two bearings are installed between the high-speed shaft and the bearing seat;
[0007] A spacer ring is disposed between the inner rings of the two bearings, and at least three elastic members are disposed between the outer rings of the two bearings. The plurality of elastic members are distributed at equal intervals along the circumference of the bearings.
[0008] The above-mentioned controllable device for the axial clearance of the high-speed shaft bearing of the gear box, wherein the inner wall of the bearing seat is provided with a convex ring, the outer rings of the two bearings are respectively limitedly matched with the two sides of the convex ring, at least three elastic members are arranged in the convex ring, and the end of each elastic member is respectively against the outer rings of the two bearings.
[0009] The above-mentioned controllable device for the axial clearance of the high-speed shaft bearing of the gear box, wherein the convex ring is provided with at least three through holes along its circumference, each of the through holes is arranged along the axial direction of the convex ring, and each of the through holes is provided with an elastic member.
[0010] In the above-mentioned controllable device for the axial clearance of the high-speed shaft bearing of the gear box, a plurality of elastic members are distributed at equal intervals along the circumference of the convex ring.
[0011] The above-mentioned controllable device for the axial clearance of the gearbox high-speed shaft bearing, wherein a distance ring is provided on the high-speed shaft, and the distance ring is against the inner ring of one of the bearings; a nut is provided on the high-speed shaft, and the nut is against the inner ring of another bearing.
[0012] In the above-mentioned controllable device for the axial clearance of the gear box high-speed shaft bearing, a stop washer is provided between the inner ring of the other bearing and the nut.
[0013] The above-mentioned controllable device for the axial clearance of the high-speed shaft bearing of the gear box, wherein a transparent cover is provided on the bearing seat, and an oil seal is provided between the transparent cover and the high-speed shaft.
[0014] The above-mentioned controllable device for the axial clearance of the high-speed shaft bearing of the gear box, wherein a high-speed bearing is also installed on the high-speed shaft, and the high-speed bearing is arranged between the end of the high-speed shaft and the distance ring.
[0015] The above-mentioned controllable device for the axial clearance of the high-speed shaft bearing of the gear box, wherein the spacer is located on the inner side of the convex ring.
[0016] The above-mentioned controllable device for the axial clearance of the gearbox high-speed shaft bearing, wherein the two bearings are respectively a first bearing and a second bearing, the first bearing and the second bearing are both installed on the high-speed shaft, and the inner ring of the high-speed bearing, the distance ring, the inner ring of the first bearing, the spacer, the inner ring of the second bearing, the stop washer, and the nut are sequentially abutted against each other along the axial direction of the high-speed shaft.
[0017] Compared with the prior art, the above technical solution has the following positive effects:
[0018] The utility model has the advantages of simple structure, low processing cost, uniform axial preload force on a pair of bearings used in pairs, convenient adjustment and high adjustment accuracy, and more convenient and reliable bearing clearance control and time and labor saving during assembly and maintenance of the reducer, thus greatly improving assembly efficiency and the actual service life of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 This is a structural schematic diagram of a bearing seat in a controllable device for axial clearance of a high-speed shaft bearing of a gear box according to the utility model;
[0020] Figure 2 The utility model is a controllable device for the axial clearance of the high-speed shaft bearing of a gear box Figure 1 The overall structural cross-sectional view in the AA direction;
[0021] Figure 3 The utility model is a controllable device for the axial clearance of the high-speed shaft bearing of a gear box. Figure 2 A partial enlarged view of
[0022] In the attached drawings: 1. high-speed shaft; 2. bearing seat; 3. bearing; 4. spacer; 5. elastic member; 6. distance ring; 7. nut; 8. stop washer; 9. transparent cover; 10. oil seal; 11. high-speed bearing; 21. convex ring; 22. through hole; 31. inner ring; 32. outer ring; 33. first bearing; 34. second bearing. DETAILED DESCRIPTION
[0023] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.
[0024] like Figures 1 to 3 As shown, a controllable device for the axial clearance of the high-speed shaft bearing of a gear box according to a preferred embodiment is shown, comprising: a high-speed shaft 1, a bearing seat 2 and two bearings 3, wherein the two bearings 3 are installed between the high-speed shaft 1 and the bearing seat 2.
[0025] Further, as a preferred embodiment, a spacer ring 4 is disposed between the inner rings 31 of the two bearings 3 , and at least three elastic members 5 are disposed between the outer rings 32 of the two bearings 3 . The plurality of elastic members 5 are distributed at equal intervals along the circumference of the bearings 3 .
[0026] Furthermore, as a preferred embodiment, a convex ring 21 is provided on the inner wall of the bearing seat 2, and the outer rings 32 of the two bearings 3 are respectively matched with the two side limiters of the convex ring 21, at least three elastic members 5 are arranged in the convex ring 21, and the end of each elastic member 5 is respectively against the outer rings of the two bearings 3.
[0027] Furthermore, as a preferred embodiment, at least three through holes 22 are provided on the convex ring 21 along its circumference, each through hole 22 is provided along the axial direction of the convex ring 21 , and an elastic member 5 is provided in each through hole 22 .
[0028] Furthermore, as a preferred embodiment, the plurality of elastic members 5 are distributed at equal intervals along the circumference of the convex ring.
[0029] Preferably, the elastic member 5 is a preloaded spring.
[0030] Preferably, the length of the spacer 4 is greater than the thickness of the protruding ring 21 .
[0031] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation methods and protection scope of the present invention.
[0032] The utility model also has the following implementation methods based on the above:
[0033] In further embodiments of the present invention, please continue to refer to Figures 1 to 3As shown, a distance ring 6 is provided on the high-speed shaft 1 , and the distance ring 6 abuts against the inner ring 31 of one bearing 3 ; a nut 7 is provided on the high-speed shaft 1 , and the nut 7 abuts against the inner ring 31 of another bearing 3 .
[0034] In a further embodiment of the present invention, a stop washer 8 is provided between the inner ring 31 of the other bearing 3 and the nut 7 .
[0035] In a further embodiment of the utility model, a transparent cover 9 is provided on the bearing seat 2 , and an oil seal 10 is provided between the transparent cover 9 and the high-speed shaft 1 .
[0036] In a further embodiment of the present invention, a high-speed bearing 11 is further installed on the high-speed shaft 1 , and the high-speed bearing 11 is arranged between the end of the high-speed shaft 1 and the distance ring 6 .
[0037] In a further embodiment of the present invention, the spacer ring 4 is located inside the convex ring 21 .
[0038] In a further embodiment of the utility model, the two bearings 3 are respectively a first bearing 33 and a second bearing 34. The first bearing 33 and the second bearing 34 are both installed on the high-speed shaft 1. The inner ring of the high-speed bearing 11, the distance ring 6, the inner ring 31 of the first bearing 3, the spacer 4, the inner ring 32 of the second bearing, the stop washer 8, and the nut 7 are sequentially abutted along the axial direction of the high-speed shaft 1.
[0039] Through simulation and experiments, it is concluded that as long as the bearings used in pairs are subjected to a certain axial force during operation, their cages will not be damaged.
[0040] By adding elastic parts between the outer rings of the two bearings, the axial preload force of a pair of bearings can be uniform, the adjustment is convenient and the adjustment accuracy is high.
[0041] The utility model has the advantages of simple structure, low processing cost, uniform axial preload force on a pair of bearings used in pairs, convenient adjustment and high adjustment accuracy, and more convenient and reliable bearing clearance control and time and labor saving during assembly and maintenance of the reducer, thus greatly improving assembly efficiency and the actual service life of the product.
[0042] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.
Claims
1. A controllable device for the axial clearance of a high-speed shaft bearing of a gearbox, characterized in that: It comprises: a high-speed shaft, a bearing seat and two bearings, wherein the two bearings are installed between the high-speed shaft and the bearing seat; A spacer ring is disposed between the inner rings of the two bearings, and at least three elastic members are disposed between the outer rings of the two bearings. The plurality of elastic members are distributed at equal intervals along the circumference of the bearings.
2. The controllable device for the axial clearance of the high-speed shaft bearing of the gearbox according to claim 1, characterized in that: The inner wall of the bearing seat is provided with a convex ring, and the outer rings of the two bearings are respectively limitedly matched with the two sides of the convex ring, at least three elastic members are arranged in the convex ring, and the end of each elastic member is respectively against the outer rings of the two bearings.
3. The controllable device for the axial clearance of the high-speed shaft bearing of the gearbox according to claim 2, characterized in that: At least three through holes are arranged on the convex ring along its circumference, each of the through holes is arranged along the axial direction of the convex ring, and each of the through holes is provided with an elastic member.
4. The controllable device for the axial clearance of the high-speed shaft bearing of the gearbox according to claim 3, characterized in that: The plurality of elastic members are distributed at equal intervals along the circumference of the convex ring.
5. The controllable device for the axial clearance of the high-speed shaft bearing of the gearbox according to claim 1, characterized in that: A distance ring is arranged on the high-speed shaft, and the distance ring abuts against the inner ring of one of the bearings; a nut is arranged on the high-speed shaft, and the nut abuts against the inner ring of another bearing.