CN108561542B

CN108561542B - Bearing lubricating structure of speed reducer

Info

Publication number: CN108561542B
Application number: CN201810400731.3A
Authority: CN
Inventors: 刘蕾; 孙纯哲; 范佳伦; 何靖
Original assignee: Hefei JEE Power System Co Ltd
Current assignee: Hefei JEE Power System Co Ltd
Priority date: 2018-04-28
Filing date: 2018-04-28
Publication date: 2021-07-30
Anticipated expiration: 2038-04-28
Also published as: CN108561542A

Abstract

A bearing lubricating structure of a speed reducer in the technical field of speed reducers comprises a bearing, a bearing baffle and a speed reducer shaft, wherein the bearing, the bearing baffle and the speed reducer shaft are arranged in a speed reducer shell, a bearing inner ring is arranged on the speed reducer shaft, the bearing baffle is arranged on one side of the bearing, the bearing baffle is fixed on the speed reducer shell, and the speed reducer shell is simultaneously used as a bearing seat; the bearing baffle comprises a baffle shoulder which is abutted against the bearing, and the baffle shoulder extends along the axial direction of the speed reducer shaft at the side far away from the bearing and is radially and inwardly retracted along the speed reducer shaft to form a lip baffle; the bearing baffle plate is matched with the reducer shell and the bearing seat to form a bearing oil containing cavity, and an oil guide groove is formed in the reducer shell relative to the bearing oil containing cavity. The lubricating oil storage mechanism is assembled at the position of the bearing to contain enough grease, so that the bearing can be subjected to stable oil bath lubrication when working, the lubricating effect is improved, and the design of miniaturization of the speed reducer is facilitated.

Description

Bearing lubricating structure of speed reducer

Technical Field

The invention relates to the technology in the field of speed reducers, in particular to a bearing lubricating structure of a speed reducer.

Background

The inner bearings of the speed reducer are all open type bearings. In the conventional design, an oil guide groove is arranged on a speed reducer shell, and the oil guide groove guides lubricating oil, which is stirred and guided by a speed reducer gear, to a bearing to lubricate the bearing.

The development of new energy automobiles and the like in the current market puts forward miniaturization requirements on the speed reducer, so that the structures of all parts in the speed reducer are very compact (as shown in figure 1), the assembly positions of bearings are often difficult to meet the optimal design, and the lubricating oil introduced by an oil guide groove is insufficient, so that poor lubrication of the bearings is caused.

The problem can be solved by improving the performance of the bearing, but the difficulty and risk of the type selection of the bearing are also improved, and the comprehensive efficiency of the product is reduced. The problem can be solved by increasing the forced lubrication of the oil pump, but the increase of the oil pump not only increases the production cost, but also aggravates the difficulty and complexity of system arrangement and deviates from the original purpose of miniaturization.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a bearing lubricating structure of the speed reducer, which can carry out stable oil bath lubrication on the bearing when the bearing works by assembling a lubricating oil storage mechanism at the bearing position to contain enough grease, thereby improving the lubricating effect and being beneficial to the design of miniaturization of the speed reducer.

The invention is realized by the following technical scheme:

the invention comprises a bearing, a bearing baffle and a speed reducer shaft which are arranged in a speed reducer shell, wherein a bearing inner ring is arranged on the speed reducer shaft, the bearing baffle is arranged on one side of the bearing, the bearing baffle is fixed on the speed reducer shell, and the speed reducer shell is simultaneously used as a bearing seat;

the bearing baffle comprises a baffle shoulder which is abutted against the bearing, and the baffle shoulder extends along the axial direction of the speed reducer shaft at the side far away from the bearing and is radially and inwardly retracted along the speed reducer shaft to form a lip baffle; the bearing baffle plate is matched with the reducer shell and the bearing seat to form a bearing oil containing cavity, and an oil guide groove is formed in the reducer shell relative to the bearing oil containing cavity.

Preferably, the inner diameter of the lip baffle is smaller than the outer diameter of the bearing inner ring, and the inner diameter of the baffle shoulder along the axial extension part of the speed reducer shaft is larger than the outer diameter of the bearing inner ring, so that the bearing roller is fully lubricated.

The bearing baffle is fixed on the speed reducer shell through threaded connection.

Preferably, the bearing baffle is provided with an oil outlet opening in the circumferential direction, so that lubricating oil in the bearing oil containing cavity can be replaced conveniently.

Further preferably, the oil outlet opening and the oil guide groove are arranged in a staggered mode.

Technical effects

Compared with the prior art, the lubricating oil storage mechanism is assembled at the bearing position to contain enough grease, so that the bearing can be subjected to stable oil bath lubrication when working, the lubricating effect is improved, the limitation on the lubricating requirement when the bearing is selected is reduced, and the efficiency loss of the bearing caused by poor lubrication is reduced; meanwhile, other active lubrication parts are not introduced, the requirement on space arrangement is low, and the design of the miniaturization of the speed reducer is facilitated.

Drawings

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

FIG. 2 is a schematic view of the entire structure of embodiment 1;

FIG. 3 is a schematic view of the structure of embodiment 1 with the bearing removed;

FIG. 4 is a side view of a bearing shield and oil guide groove in example 1;

FIG. 5 is a side view of the internal structure of embodiment 1;

FIG. 6 is a schematic structural view of a bearing oil-receiving chamber in embodiment 1;

FIG. 7 is a schematic view showing a structure in which a bearing and a bearing retainer are engaged in embodiment 1;

in the figure: the bearing comprises a bearing 1, a bearing baffle 2, a speed reducer shaft 3, a speed reducer cavity 4, a bearing seat 5, lubricating oil 6, a fixing screw 7, a bearing inner ring 11, a bearing roller 12, a bearing outer ring 13, a baffle shoulder 21, a lip baffle 22, a speed reducer shell 41, an oil guide groove 42 and a bearing oil containing cavity 43.

Detailed Description

The invention is described in detail below with reference to the drawings and the detailed description.

Example 1

As shown in fig. 2, fig. 3, fig. 5 and fig. 6, the present embodiment includes a bearing 1, a bearing baffle 2 and a reducer shaft 3, which are arranged in a reducer housing 41, wherein a bearing inner ring 11 of the bearing 1 is mounted on the reducer shaft 3, the bearing baffle 2 is arranged on one side of the bearing 1, the bearing baffle 2 is fixed on the reducer housing 41 by a fixing screw 7, and part of the reducer housing simultaneously serves as a bearing seat 5 of the bearing 1;

as shown in fig. 6 and 7, the bearing baffle 2 comprises a baffle shoulder 21 which abuts against the bearing 1, and the baffle shoulder 21 extends along the axial direction of the reducer shaft at the side far away from the bearing and is retracted along the radial direction of the reducer shaft to form a lip baffle 22; the bearing baffle 2 is matched with the reducer shell 41 and the bearing seat 5 to form a bearing oil containing cavity 43, and an oil guide groove 42 is formed in the reducer shell 41 relative to the bearing oil containing cavity 43, as shown in fig. 4.

The inner diameter D of the lip baffle 22 is smaller than the outer diameter of the bearing inner ring 11, and the inner diameter D of the baffle shoulder 21 along the axial extension part of the speed reducer shaft is larger than the outer diameter of the bearing inner ring 11, so that the bearing roller 12 in the bearing 1 is fully lubricated.

As shown in fig. 4, the bearing baffle 2 is provided with an oil outlet in the circumferential direction, so as to facilitate replacement of the lubricating oil in the bearing oil-containing cavity 43; the oil outlet opening is mainly located in the second quadrant, and the oil guide groove 42 is located in the first quadrant and arranged in a staggered mode with the oil outlet opening.

In the working process of the embodiment, the lubricating oil in the reducer cavity 4 splashes to the reducer casing 41 by stirring, then flows into the bearing oil containing cavity 43 through the oil guide groove 42 and the lip baffle 22, and is accumulated to form the lubricating oil 6, and the lubricating oil 6 fills the gap between the bearing outer ring 13 and the bearing inner ring 11, so that the bearing roller 12 can be immersed in the lubricating oil to be sufficiently lubricated.

As a modification of the present embodiment, a sliding bearing may be used instead of the rolling bearing.

It is to be emphasized that: the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and all simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A bearing lubricating structure of a speed reducer is characterized by comprising a bearing, a bearing baffle and a speed reducer shaft, wherein the bearing, the bearing baffle and the speed reducer shaft are arranged in a speed reducer shell, an inner ring of the bearing is arranged on the speed reducer shaft, the bearing baffle is arranged on one side of the bearing, the bearing baffle is fixed on the speed reducer shell, and the speed reducer shell is used as a bearing seat;

the bearing baffle comprises a baffle shoulder which is abutted against the bearing, and the baffle shoulder extends along the axial direction of the speed reducer shaft at the side far away from the bearing and is radially and inwardly retracted along the speed reducer shaft to form a lip baffle; the bearing baffle plate is matched with the reducer shell and the bearing seat to form a bearing oil containing cavity, and an oil guide groove is formed in the reducer shell relative to the bearing oil containing cavity;

the inner diameter of the lip baffle is smaller than the outer diameter of the bearing inner ring, and the inner diameter of the baffle shoulder along the axial extension part of the speed reducer shaft is larger than the outer diameter of the bearing inner ring;

the bearing baffle is fixedly connected to the reducer shell through threads; the bearing baffle is provided with an oil outlet opening in the circumferential direction, so that lubricating oil in the bearing oil containing cavity can be replaced conveniently; the oil outlet opening is mainly positioned in the second quadrant, and the oil guide groove is positioned in the first quadrant and is arranged in a staggered manner with the oil outlet opening; the inside lubricating oil of reduction gear cavity splashes to reduction gear housing through stirring, and oil groove, lip baffle inflow bearing hold the oil cavity through leading to the rethread, and the accumulation forms lubricating oil, and lubricating oil is full of the clearance between bearing inner race and the bearing outer race for the bearing roller can be bathed wherein, obtains fully lubricated.