CN213088725U

CN213088725U - Oil lubrication structure of internal bearing of speed reducer

Info

Publication number: CN213088725U
Application number: CN202021894653.6U
Authority: CN
Inventors: 李帅龙; 汪海洪
Original assignee: Zhengzhou Zhiqu Technology Co ltd
Current assignee: Zhengzhou Zhiqu Technology Co ltd
Priority date: 2020-09-03
Filing date: 2020-09-03
Publication date: 2021-04-30
Anticipated expiration: 2030-09-03

Abstract

The utility model discloses an oil lubrication structure of a speed reducer inner bearing, which comprises an input shaft, an output shaft and a middle shaft, wherein the input shaft and the output shaft are coaxially arranged, and adjacent input shaft gears and output shaft gears on the input shaft and the output shaft are respectively meshed with a middle shaft driven gear and a middle shaft driving gear on the middle shaft; the input shaft, the output shaft and the intermediate shaft are respectively fixed on the front shell and the connecting plate through an input shaft bearing, an output shaft bearing, an intermediate shaft front bearing and an intermediate shaft rear bearing; the front shell, the connecting plate and the rear shell are respectively provided with a transverse oil guide groove and are communicated with each other, and the oil guide grooves on the rear shell are communicated with the output shaft bearing; an oil storage tank is further arranged on the front shell. The utility model discloses a can effectively satisfy high rotational speed's user demand, can also use in other electric drive systems, provide general bearing and arrange the solution.

Description

Oil lubrication structure of internal bearing of speed reducer

Technical Field

The utility model relates to a reduction gear that electric automobile field used, concretely relates to oil lubrication structure of reduction gear inner bearing.

Background

In the field of automobiles, a driving scheme of a motor-driven speed reducer is a common driving scheme, and the structural form of the speed reducer is also diversified. At present, along with the use of high rotational speed motor more and more frequently, the promotion of motor speed also more and more high to the requirement of the bearing that the reduction gear that matches with the motor used, the bearing that the reduction gear used except that will satisfy the load demand of driving motor transmission still will bear the demand of high rotational speed, and the bearing is in the use, will avoid because of the bearing ablation that lubrication and heat dissipation are bad to lead to.

In order to improve the performance requirement of the bearing, how to ensure that the bearing can obtain a good lubricating environment in the design process of the speed reducer becomes an important breakthrough in the design process of the speed reducer in the field of automobiles at present.

Disclosure of Invention

The utility model provides a bearing oil lubrication structure of reduction gear for electric motor car satisfies the high rotational speed requirement of motor output.

The utility model adopts the technical proposal that: an oil lubrication structure of a bearing in a speed reducer comprises an input shaft, an output shaft and an intermediate shaft, wherein the input shaft and the output shaft are coaxially arranged, and adjacent input shaft gears and output shaft gears on the input shaft and the output shaft are respectively meshed with an intermediate shaft driven gear and an intermediate shaft driving gear on the intermediate shaft; the input shaft, the output shaft and the intermediate shaft are respectively fixed on the front shell and the connecting plate through an input shaft bearing, an output shaft bearing, an intermediate shaft front bearing and an intermediate shaft rear bearing; the front shell, the connecting plate and the rear shell are respectively provided with a transverse oil guide groove and are communicated with each other, and the oil guide grooves on the rear shell are communicated with the output shaft bearing; an oil storage tank is further arranged on the front shell.

Further, lead the oil groove and set up on the procapsid of input shaft and output shaft one side, and lead the opening direction of oil groove upwards.

Furthermore, partial teeth of the intermediate shaft driven gear and the intermediate shaft driving gear on the intermediate shaft are immersed under the liquid level of the lubricating oil, and the splashed lubricating oil can fall into the oil storage tank when the intermediate shaft rotates.

The utility model discloses the beneficial effect who produces is: the utility model can effectively meet the use requirement of high rotation speed; simultaneously the utility model discloses can also use in other electric drive systems, provide general bearing arrangement solution.

Drawings

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

FIG. 2 is a cross-sectional view of A-A of the present invention;

FIG. 3 is a cross-sectional view of B-B of the present invention;

in the figure: 1-front housing, 2-input shaft bearing, 3-input shaft gear, 4-input shaft, 5-output shaft gear, 6-output shaft, 7-intermediate shaft rear bearing, 8-intermediate shaft, 9-intermediate shaft driving gear, 10-intermediate shaft driven gear, 11-intermediate shaft front bearing, 12-connecting plate, 13-rear housing, 14-output shaft bearing, 15-oil storage tank, 16-front housing oil guide tank, 17-connecting plate oil guide tank, 18-rear housing oil guide tank and 19-lubricating oil level.

Detailed Description

The present invention will be further described with reference to the accompanying drawings.

The utility model relates to an oil lubrication structure of reduction gear inner bearing, according to the spatial position of reduction gear, the bearing department is introduced with the lubricating oil in the reduction gear box to the design of meshing rotation, oil storage tank, leading the oil groove through the gear to lubricated and dispel the heat of bearing to satisfy high rotational speed's requirement, reduce the fault rate of bearing, guarantee the life demand of bearing.

As shown in fig. 1, in the conventional transmission structure, there are many gears arranged on the intermediate shaft, and the effect of lubricating the rear bearing of the output shaft can be achieved by splashing in the process of rotating and meshing the gears. For the reducer structure, the number of gears arranged on the intermediate shaft 8 is small, and the axial distance between the intermediate shaft driving gear 9 and the output shaft rear bearing 14 is large. Meanwhile, the intermediate shaft driving gear 9 can only contact little lubricating oil in the rotating process, so that insufficient lubrication occurs to the output shaft bearing 14, heat cannot be dissipated in time, and the bearing ablation fault is caused.

The utility model comprises a front shell 1, a connecting plate 2, a rear shell 13, an input shaft 4, an output shaft 6 and a middle shaft 8, wherein the input shaft 4 and the output shaft 6 are coaxially arranged, and an input shaft gear 3 and an output shaft gear 5 which are adjacent to each other on the input shaft 4 and the output shaft 6 are respectively meshed with a middle shaft driven gear 10 and a middle shaft driving gear 9 on the middle shaft 8; the input shaft 7, the output shaft 6 and the intermediate shaft 8 are respectively fixed on the front shell 1 and the connecting plate 12 through an input shaft bearing 2, an output shaft bearing 14, an intermediate shaft front bearing 11 and an intermediate shaft rear bearing 7; the input shaft bearing 2 is coupled to the input shaft 4 by interference, the output shaft bearing 14 is coupled to the output shaft 6 by interference, the intermediate shaft front bearing 11 and the intermediate shaft rear bearing 7 are coupled to the intermediate shaft 8 by interference, an outer ring of the input shaft bearing 2 is matched with a bearing seat of the front housing 1, the output shaft bearing 14 is matched with the connecting plate 12, the intermediate shaft front bearing 11 is matched with the front housing 1, and the intermediate shaft rear bearing 7 is matched with the connecting plate 12.

The utility model discloses in, all be equipped with the horizontal procapsid on procapsid 1, connecting plate 12 and the back casing 13 and lead oil groove 16, the connecting plate leads oil groove 17 and the back casing leads oil groove 18 and communicates each other, and the back casing leads oil groove 18 and accesss to output shaft bearing 14, still is equipped with oil storage tank 15 on procapsid 1, and oil storage tank 15 and procapsid are led oil groove 16, connecting plate and are led oil groove 17, back casing and are led oil groove 18 and set up the both sides at output shaft 6 respectively. Part of teeth of a middle shaft driven gear 10 and a middle shaft driving gear 9 on the middle shaft 8 are immersed under a lubricating oil liquid level 19, the middle shaft driven gear 10 can lead lubricating oil to the oil storage tank 15 and the front shell guide oil groove 16 along the inner wall of the front shell 1 in the rotating process, lubricating oil flowing into the oil storage tank 15 is lubricated and radiated to the input shaft bearing 2, lubricating oil flowing into the front shell guide oil groove 16 passes through the connecting plate guide oil groove 17 and the rear shell guide oil groove 18 to reach the end face of the output shaft bearing 14, and lubrication and radiation of the output shaft bearing 14 are achieved. The intermediate shaft front bearing 11 and the intermediate shaft rear bearing 7 are also immersed in lubricating oil, so that the bearings are lubricated and radiate heat.

The utility model has the characteristics of with low costs, maneuverability is strong, simple structure, can be applied to the lubrication of the bearing of reduction gear among the high rotational speed electric drive system, also can apply to other electric drive systems, provide the lubrication and the heat dissipation solution of reliable bearing.

Claims

1. The utility model provides an oil lubrication structure of reduction gear inner bearing, includes input shaft, output shaft and countershaft, its characterized in that: the input shaft and the output shaft are coaxially arranged, and adjacent input shaft gears and output shaft gears on the input shaft and the output shaft are respectively meshed with a middle shaft driven gear and a middle shaft driving gear on a middle shaft; the input shaft, the output shaft and the intermediate shaft are respectively fixed on the front shell and the connecting plate through an input shaft bearing, an output shaft bearing, an intermediate shaft front bearing and an intermediate shaft rear bearing; the front shell, the connecting plate and the rear shell are respectively provided with a transverse oil guide groove and are communicated with each other, and the oil guide grooves on the rear shell are communicated with the output shaft bearing; an oil storage tank is further arranged on the front shell.

2. The oil lubricating structure of an inner bearing of a speed reducer according to claim 1, wherein: the oil guide groove is formed in the front shell on one side of the input shaft and the output shaft, and the opening direction of the oil guide groove is upward.

3. The oil lubricating structure of an inner bearing of a speed reducer according to claim 1, wherein: partial teeth of the intermediate shaft driven gear and the intermediate shaft driving gear on the intermediate shaft are immersed under the liquid level of lubricating oil, and when the intermediate shaft rotates, splashed lubricating oil can fall into the oil storage tank.