CN211901511U

CN211901511U - End face pressing structure of bearing

Info

Publication number: CN211901511U
Application number: CN201921076852.3U
Authority: CN
Inventors: 陈昌俊; 徐秀波; 孙婷娜; 朱姗姗; 于川; 吴琼; 王冬岩; 鲁洪宾; 吴涛; 陈一铭
Original assignee: AECC Harbin Dongan Engine Co Ltd
Current assignee: AECC Harbin Dongan Engine Co Ltd
Priority date: 2019-07-09
Filing date: 2019-07-09
Publication date: 2020-11-10
Anticipated expiration: 2029-07-09

Abstract

The utility model relates to a bearing mounting structure, in particular to terminal surface compact structure of bearing. The bearing (3) is arranged at one end of the shaft (1), the structure comprises a nut (2), an internal thread is processed at one end of the shaft (1), and the nut (2) is fixed at one end of the shaft through threaded connection and is pressed on the end surface of the bearing (3); the structure also comprises a locking plate (4), wherein two end faces of the locking plate (4) are respectively provided with a bulge (41), the inner wall of the shaft end provided with the internal thread is provided with a groove (5) along the axial direction, and the nut (2) is also provided with a groove (6); the locking plate (4) is positioned between the end faces of the nut (2) and the bearing (3), and the protrusions on the locking plate (4) are respectively arranged in the grooves (5 and 6) of the shaft end and the nut. The technical scheme utilizes limited space, solves the technical problem of bearing looseness, and realizes reliable compression of the bearing.

Description

End face pressing structure of bearing

Technical Field

The utility model relates to a bearing mounting structure, in particular to terminal surface compact structure of bearing.

Background

The gear shaft in the existing transmission gear box is supported by bearings at two ends, the bearing inner ring rotates along with the gear shaft during working, the bearing and the gear shaft are generally designed to be in interference fit, but in order to ensure the convenience of assembling and disassembling the bearing and avoid the deformation of the bearing inner ring caused by overlarge assembling stress, the clearance and the running precision of the bearing are influenced, and the interference of the fit of the bearing and the gear shaft is generally designed to be smaller (generally about 0.015). The requirement of normal operation of the gearbox can be met under normal conditions. When the gear shaft needs to be attached with other functional structures, such as a centrifugal ventilator impeller, a clutch, a buffer mechanism and the like, because the number of parts is large, unstable factors are increased during working, and the bearing is easy to loose axially. However, in a certain transmission gear box, a gear shaft is attached with a clutch buffer mechanism, and a bearing is directly utilized for axial compression, but the mechanisms generally have large size and inertia force, have poor stability during working, easily cause the axial separation of the bearing, cause the clearance of the combined end surfaces of various parts, cause the abrasion of the end surfaces of parts such as a spacing gasket and the like, and need to be additionally provided with an end surface compression structure according to the existing structure under the condition of not scrapping the existing parts. As shown in the attached figure 1, a clutch buffer mechanism 8 is installed on a shaft 1, the whole mechanism is axially compressed through a bearing 3, and the axial distance between the bearing 3 and the clutch buffer mechanism 8 is adjusted through a gasket 7.

Disclosure of Invention

The technical problems solved by the invention are as follows: under the condition that the existing gear shaft is not scrapped, the axial compression of the whole bearing is realized.

The technical scheme of the invention is as follows: the end face compression structure of the bearing is characterized in that the bearing is installed at one end of a shaft and comprises a nut, wherein an internal thread is machined at one end of the shaft, and the nut is fixed at one end of the shaft through threaded connection and is compressed on the end face of the bearing;

the structure also comprises a lock cup, wherein two end faces of the lock cup are respectively provided with a bulge, the inner wall of the shaft end provided with the internal thread is provided with a groove along the axial direction, and the nut is also provided with a groove;

the locking plate is positioned between the nut and the end surface of the bearing, and the bulges on the locking cup are respectively arranged in the shaft end and the groove of the nut. The technical scheme utilizes limited space, solves the technical problem of bearing looseness, and realizes reliable compression of the bearing.

Preferably, the lock cup and the nut are pressed on the end face of the bearing inner ring. The interference between the lock cup, the nut and the bearing rolling component is avoided.

Preferably, the depth of the internal thread at the shaft end does not exceed the position of the bearing mounting shoulder. The influence of bending and shearing stress at the position of the bearing mounting shoulder is fully considered, and the strength of the shaft is prevented from being weakened.

Drawings

FIG. 1 is a schematic diagram of a prior art structure;

FIG. 2 is a schematic view of a lock cup structure;

FIG. 3 is a schematic view of a nut;

fig. 4 is a schematic structural diagram of the present technical solution.

In the figure: 1-shaft 2-nut 3-bearing 4-lock cup 41-protrusion 5-groove 6-groove 7-gasket 8-buffer mechanism.

Detailed Description

As shown in fig. 1 and 4, the nut 2 is screwed with the internal thread on the shaft 1 to axially compress the lock cup 4, the bearing 3, the gasket 7 and the buffer mechanism 8, thereby realizing the compression function. The lock cup is positioned between the bearing and the nut, two bulges 41 at one end of the lock cup are matched with the groove 6 of the nut 2, and the edge of the lock cup is pressed into the groove 6 of the nut 2 after assembly, so that the locking function of the nut is realized.

In this technical scheme, need carry out supplementary processing internal thread and terminal surface recess 5 to axle 1, in order to avoid reducing the intensity of axle 1, the degree of depth of internal thread will be less than the fender shoulder position of axle.

The lock cup is processed as shown in fig. 2, wherein the diameter of the end surface of the lock cup is smaller than the outer diameter of the inner ring of the bearing 3, so as to avoid influencing the normal operation of the bearing. The height of the lock cup protrusion 41 needs to be determined according to the distance between the end face of the assembled bearing 3 and the end face of the shaft 1, and the protrusion 41 can be embedded into the shaft groove 6 after assembly, so that the locking effect is guaranteed. The nut 2 is machined as shown in fig. 3. After the shaft 1, the nut 2 and the lock cup 4 are processed, the lock cup is assembled and locked in sequence as shown in fig. 4.

Claims

1. An end face pressing structure of a bearing, the bearing (3) being mounted on one end of a shaft (1), characterized in that: the structure comprises a nut (2), wherein an internal thread is processed at one end of a shaft (1), and the nut (2) is fixed at one end of the shaft through threaded connection and is pressed on the end surface of a bearing (3);

the structure also comprises a lock cup (4), two end faces of the lock cup (4) are respectively provided with a bulge (41), the inner wall of the shaft end provided with the internal thread is provided with a groove (5) along the axial direction, and the nut (2) is also provided with a groove (6);

the lock cup (4) is positioned between the nut (2) and the end face of the bearing (3), and the bulges on the lock cup (4) are respectively arranged in the grooves (5 and 6) of the shaft end and the nut;

the lock cup (4) and the nut (2) are tightly pressed on the end face of the bearing inner ring.

2. An end face pressing structure of a bearing according to claim 1, wherein: the depth of the internal thread at the shaft end does not exceed the position of the bearing mounting shoulder.