CN110985552A

CN110985552A - Tool for eliminating pre-tightening force of angular contact shaft

Info

Publication number: CN110985552A
Application number: CN201911368594.0A
Authority: CN
Inventors: 石庆华
Original assignee: GUANGZHOU NTN-YULON DRIVETRAIN CO LTD
Current assignee: GUANGZHOU NTN-YULON DRIVETRAIN CO LTD
Priority date: 2019-12-26
Filing date: 2019-12-26
Publication date: 2020-04-10

Abstract

The invention discloses a tool for eliminating the pre-tightening force of an angular contact shaft, which comprises a support shaft, a first angular contact bearing inner spacer sleeve, an outer spacer sleeve, a second angular contact bearing inner spacer sleeve, a gasket and a locking nut, wherein the first angular contact bearing inner spacer sleeve and the second angular contact bearing inner spacer sleeve are sleeved on the surface of the support shaft, the inner spacer sleeve and the outer spacer sleeve are fixed between the first angular contact bearing inner spacer sleeve and the second angular contact bearing inner spacer sleeve, the inner spacer sleeve is attached to the surface of the support shaft, the gasket is sleeved on the outer side surface of the support shaft close to the second angular contact bearing inner spacer sleeve, and the locking nut is installed at the tail end of the support shaft close to. The invention is portable, time-saving, labor-saving and easy to operate, the external spacer sleeve is moved by hands, and the person in the technical field can judge the pre-tightening force by combining experience, and the pre-tightening force is adjusted to be proper by changing the height of the external spacer sleeve.

Description

Tool for eliminating pre-tightening force of angular contact shaft

Technical Field

The invention relates to the technical field of tools for eliminating the pre-tightening force of an angular contact shaft, in particular to a tool for eliminating the pre-tightening force of the angular contact shaft.

Background

The thrust angular contact bearing can bear radial and unidirectional axial loads, is usually used in pairs and is usually used in the occasions with higher rotation precision and higher rotation speed, and in order to improve the rigidity and the rotation precision of the bearing, a preload must be applied to the inner ring and the outer ring of the bearing during assembly, so that the inner ring and the outer ring of the bearing generate relative displacement, the play of the bearing is eliminated, and the rolling bodies and the tracks of the inner ring and the outer ring generate initial contact elastic deformation, and the method is called pre-tightening. After pre-tightening, the contact area between the roller path and the rolling bodies is increased, the number of the loaded rolling bodies is increased, and the stress of each rolling body is more uniform, so that the rigidity of the bearing is increased, and the service life is prolonged. But the pretightening force is not too large, otherwise, the abrasion and the heat generation of the bearing are increased, and the service life of the bearing is obviously reduced.

The method for adjusting the pretightening force comprises the following steps: two spacing sleeves with different lengths are respectively abutted against the inner ring and the outer ring of the bearing, in order to obtain a certain pretightening force, the relative offset of the inner ring and the outer ring of the bearing under the action of the given pretightening force must be measured in advance (a bearing manufacturer can also provide the internal structure and relevant dimensions of the bearing, including the groove curvature, the steel ball curvature, the material performance and the like), and the height of the spacing sleeves or the grinding amount of the height of the inner ring and the outer ring is determined according to the relative offset. In many domestic occasions, the pretightening force is controlled by experience, and the method comprises the following steps: firstly, because the bearing precision consistency ratio in China is poor, secondly, the control method of the pretightening force is not very standard, and thirdly, the machine for measuring the pretightening force is expensive. Fourth, professional machines for measuring and eliminating angular thrust contact bearing clearances are not popularized.

Disclosure of Invention

The invention aims to provide a tool for eliminating the pretightening force of an angular contact shaft, which has the advantages of portability, time and labor saving and easiness in operation, and solves the problems that a professional machine for eliminating the gap of an angular thrust contact bearing is not popularized and the process for eliminating the angular thrust contact bearing is complex and low in efficiency through experience judgment.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a eliminate instrument of angular contact axle pretightning force, includes back shaft, first angular contact bearing inner spacer sleeve, interior spacer sleeve, outer spacer sleeve, second angular contact bearing inner spacer sleeve, packing ring, lock nut, the surface cover of back shaft is equipped with first angular contact bearing inner spacer sleeve and second angular contact bearing inner spacer sleeve, and is fixed with inner spacer sleeve and outer spacer sleeve between first angular contact bearing inner spacer sleeve and the second angular contact bearing inner spacer sleeve each other, and the laminating of inner spacer sleeve is on the surface of back shaft, the outside surface cover that the back shaft is close to second angular contact bearing inner spacer sleeve is equipped with the packing ring, lock nut is installed to the end that the back shaft is close to the packing ring.

Preferably, the diameter of the outer spacer is the same as the diameter of the first angular contact bearing inner spacer and the diameter of the second angular contact bearing inner spacer.

Preferably, the outer spacer sleeve comprises a first sleeve, a threaded pipe is integrally processed on the right side of the first sleeve, an adjusting pipe is connected to the surface of the threaded pipe in a threaded manner, and a second sleeve is arranged on the right side of the adjusting pipe.

Preferably, a circular slide rail is arranged on the left side of the second sleeve, the inner wall of the circular slide rail is connected with a plurality of slide blocks in a sliding mode, and the sliding left side is bolted with the adjusting pipe.

Preferably, the two sides of the surface of the adjusting pipe are bolted with handles, and the surface of each handle is sleeved with an anti-slip sleeve.

Compared with the prior art, the invention has the following beneficial effects:

the invention can be portable, time-saving, labor-saving and easy to operate, the external spacer sleeve is moved by hands, and the personnel in the technical field can judge the pre-tightening force by combining experience, and adjust the pre-tightening force to a proper pre-tightening force by changing the height of the external spacer sleeve; after the thrust angular contact ball bearing is assembled and pre-tightened by using the device, the contact area between the roller path and the rolling bodies is increased, the number of the loaded rolling bodies is increased, and the stress of each rolling body is more uniform, so that the rigidity of the bearing is increased, the service life of the thrust angular contact ball bearing is prolonged, and the stability of the bearing under high-precision operation is ensured.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a perspective view of the outer spacer of the present invention;

FIG. 3 is an enlarged view of the invention at A in FIG. 1.

In the figure: 1. a support shaft; 2. the first corner contacts the inner spacer of the bearing; 3. an inner spacer sleeve; 4. an outer spacer sleeve; 41. a first sleeve; 42. a threaded pipe; 43. an adjusting tube; 44. a second sleeve; 5. a second angular contact bearing inner spacer; 6. a gasket; 7. locking the nut; 8. a handle.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, the present invention provides a technical solution for eliminating the pre-tightening force of an angular contact shaft: the utility model provides a eliminate instrument of angular contact axle pretightning force, includes back shaft 1, the interior spacer sleeve 2 of first angle contact bearing, interior spacer sleeve 3, outer spacer sleeve 4, the interior spacer sleeve 5 of second angular contact bearing, packing ring 6, lock nut 7, the surface cover of back shaft 1 is equipped with the interior spacer sleeve 5 of first angle contact bearing 2 and second angular contact bearing, and the interior spacer sleeve 5 of first angle contact bearing 2 and second angular contact bearing is fixed with interior spacer sleeve 3 and outer spacer sleeve 4 each other, and the interior spacer sleeve 3 laminating is on the surface of back shaft 1, the outside surface cover that back shaft 1 is close to the interior spacer sleeve 5 of second angular contact bearing is equipped with packing ring 6, back shaft 1 is close to the end of packing ring 6 and installs lock nut 7.

Further, the diameter of the outer spacer 4 is the same as the diameter of the first angular contact bearing inner spacer 2 and the diameter of the second angular contact bearing inner spacer 5.

Further, the outer spacer 4 comprises a first sleeve 41, a threaded pipe 42 is integrally formed on the right side of the first sleeve 41, an adjusting pipe 43 is connected to the surface of the threaded pipe 42 in a threaded manner, and a second sleeve 44 is arranged on the right side of the adjusting pipe 43.

Further, a circular slide rail is arranged on the left side of the second sleeve 44, the inner wall of the circular slide rail is connected with a plurality of slide blocks in a sliding manner, and the sliding left side is bolted with the adjusting pipe 43.

Further, the two sides of the surface of the adjusting pipe 43 are bolted with handles 8, and the surface of the handle 8 is sleeved with an anti-slip sleeve.

The working principle is as follows: during measurement, the first angular contact bearing inner spacer sleeve 2 is sleeved at the bottom of the shaft along the support shaft 1, then the inner spacer sleeve 3 and the outer spacer sleeve 4 are sleeved, finally the second angular contact bearing inner spacer sleeve 5 is sleeved on the surface of the shaft along the support shaft 1, then the gasket 6 is sleeved, the locking nut 7 is locked, the outer spacer sleeve 4 is moved by hand, and the pre-tightening force can be judged by combining the working experience of technicians; through the height that changes outer spacer 4, adjust to suitable pretightning force, through rotating handle 8 for handle 8 drives the regulation pipe 43 rotatory, and the regulation pipe 43 takes place rotatory in-process with screwed pipe 42, can be at the surface translation of screwed pipe 42, and drives second sleeve 44 and remove, thereby adjusts outer spacer 4's height, need not to take off outer spacer 4 and change, has increased work efficiency.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides an eliminate instrument of angular contact axle pretightning force, includes back shaft (1), first angle contact bearing inner spacer sleeve (2), inner spacer sleeve (3), outer spacer sleeve (4), second angular contact bearing inner spacer sleeve (5), packing ring (6), lock nut (7), its characterized in that: the surface cover of back shaft (1) is equipped with interior spacer sleeve of first angle contact bearing (2) and the interior spacer sleeve of second angle contact bearing (5), and first angle contact bearing interior spacer sleeve (2) and the interior spacer sleeve of second angle contact bearing (5) are fixed with interior spacer sleeve (3) and outer spacer sleeve (4) each other, and the surface of interior spacer sleeve (3) laminating at back shaft (1), the outside surface cover that back shaft (1) is close to interior spacer sleeve of second angle contact bearing (5) is equipped with packing ring (6), back shaft (1) is close to the end of packing ring (6) and installs lock nut (7).

2. The tool for eliminating angular contact shaft preload as claimed in claim 1, wherein: the diameter of the outer spacer (4) is consistent with the diameters of the first angular contact bearing inner spacer (2) and the second angular contact bearing inner spacer (5).

3. The tool for eliminating angular contact shaft preload as claimed in claim 1, wherein: the outer spacer bush (4) comprises a first sleeve (41), a threaded pipe (42) is integrally processed on the right side of the first sleeve (41), an adjusting pipe (43) is connected to the surface of the threaded pipe (42) in a threaded mode, and a second sleeve (44) is arranged on the right side of the adjusting pipe (43).

4. The tool for eliminating angular contact shaft pre-load force as claimed in claim 3, wherein: circular slide rail has been seted up on the left side of second sleeve (44), and the inner wall sliding connection of circular slide rail has a plurality of slider, gliding left side and regulating pipe (43) bolt joint.

5. The tool for eliminating angular contact shaft pre-load force as claimed in claim 3, wherein: the both sides on the surface of control tube (43) all are bolted connection handle (8), and the surface of handle (8) is cup jointed anti-skidding cover.