CN213685210U

CN213685210U - Motor spline lubricating structure

Info

Publication number: CN213685210U
Application number: CN202022237747.2U
Authority: CN
Inventors: 黄家煜; 唐轩; 官辉
Original assignee: Hepu Power Co ltd
Current assignee: Hepu Power Co ltd
Priority date: 2020-10-10
Filing date: 2020-10-10
Publication date: 2021-07-13
Anticipated expiration: 2030-10-10

Abstract

A motor spline lubricating structure comprises a motor power output shaft with an external spline at the end, a gearbox power input shaft with a shaft connecting hole at the front end, an internal spline at the hole wall of the connecting hole, and an external spline on the end of the motor power output shaft embedded in the internal spline in the connecting hole. Compared with the prior art, the utility model, the inside and outside spline that has to make motor and reducing gear box be connected has good lubrication at the work operation in-process, reduces the advantage of the wearing and tearing of inside and outside spline.

Description

Motor spline lubricating structure

Technical Field

The utility model relates to the technical field of motors.

Background

At present, most new energy motors are connected with a reduction gearbox, wherein a motor spline is directly connected with an input shaft of the reduction gearbox. However, the spline connection structure has a weak point: the internal and external splines operate at high temperature and high speed for a long time, the tooth surfaces of the splines are damaged and abraded, noise is increased, and spline matching failure can be caused to a certain extent when abrasion is accumulated.

Therefore, measures are generally needed to reduce the wear of the splines, and the improvement of the lubrication of the splines is a good choice. Good lubrication has important effects on prolonging the service life of the spline and reducing the abrasion of the spline. The current spline lubrication mode mainly comprises:

1. periodically coating lubricating grease on the spline;

2. and (4) injecting a lubricating structure.

The method 1 is suitable for the structure that the input shaft spline is arranged outside the cavity of the reduction gearbox, but the lubricating grease is gradually lost along with continuous work and use, the lubricating grease cannot be automatically compensated and added, the lubricating effect is gradually reduced, and therefore the lubricating grease needs to be periodically maintained and added. The method 2 needs to add a corresponding oil nozzle, is complex in structure and limited by installation space, and cannot be used for installing the structure.

Disclosure of Invention

The utility model aims at providing a make the inside and outside spline that motor and reducing gear box are connected have good lubrication at the work operation in-process, reduce the motor spline lubricating structure of the wearing and tearing of inside and outside spline.

The utility model discloses a realize like this: comprises a motor power output shaft with an external spline at the end, a gearbox power input shaft with a shaft connecting hole at the front end, an internal spline on the hole wall of the connecting hole, a power output shaft inserted into the connecting hole of the gearbox power input shaft, an external spline on the end of the motor power output shaft embedded in the internal spline in the connecting hole, the front end and the rear end of the gearbox power input shaft connected in the gearbox through a bearing, the gearbox power input shaft is characterized in that a gearbox inner cavity at the front end of the gearbox power input shaft directly reaches the outer ring of a bearing at the front end of the gearbox power input shaft, a gearbox inner cavity at the rear end of the gearbox power input shaft directly reaches the outer ring of a bearing at the rear end of the gearbox power input shaft, an oil seal is arranged between a motor power output shaft inserting hole of the gearbox and a motor power output shaft, and a through hole directly reaching a connecting hole is formed in the rear end of the gearbox power input shaft.

The power output shaft of the motor drives the power input shaft of the gearbox to rotate, lubricating oil in the gearbox splashes due to the rotation of the gear, and the lubricating oil flows in the inner cavity of the gearbox, the gap between the inner ring and the outer ring of the bearings at the front end and the rear end of the power input shaft of the gearbox, the inner cavity of the gearbox at the front end of the power input shaft of the gearbox, the through hole of the power input shaft of the gearbox, and the gap between the internal spline and the external spline to form circulation, so that the lubricating protection of the lubricating oil is.

Compared with the prior art, the utility model, its beneficial effect is:

1. the spline of the scheme is lubricated only through gear oil, so that the use of lubricating grease is reduced, the structure is compact, the assembly is simple, the cost is effectively reduced, and the production efficiency is improved.

2. Compared with a scheme that lubricating grease is coated on the spline, the spline lubricating structure reduces the weakness of regular maintenance and saves a large amount of maintenance cost.

3. The spline lubricating structure of this scheme compares and sprays lubricating structure, has reduced installation space.

The spline lubricating structure of this scheme can last the lubricated effect of spline for a long time, has reduced the wearing and tearing condition of spline, has improved mechanical transmission's reliability.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

The invention will now be described in further detail with reference to the accompanying drawings and examples:

as shown in figure 1, the power output shaft comprises a motor power output shaft 2 with an external spline 1 at the end 201, a gearbox power input shaft 4 with a shaft connecting hole 3 at the front end, an internal spline 5 is arranged on the hole wall of the connecting hole 3, the power output shaft 2 is inserted into the connecting hole 3 of the gearbox power input shaft 4, the external spline 1 on the end of the motor power output shaft 2 is embedded into the internal spline 5 in the connecting hole 3, the front end and the rear end of the gearbox power input shaft 4 are connected into a gearbox 7 through bearings 6, and the power output shaft is characterized in that a gearbox inner cavity 8 at the front end of the gearbox power input shaft 4 is directly connected to an outer ring 601 of the bearing 6 at the front end of the gearbox power input shaft 4, a gearbox inner cavity 9 at the rear end of the gearbox power input shaft 4 is directly connected to the outer ring 601 of the bearing 6 at the rear end of the gearbox power input shaft 4, and an oil seal 11 is arranged between a motor power output shaft ) And a through hole 12 which is directly communicated with the connecting hole 3 is arranged at the rear end of the power input shaft 4 of the gearbox. The through-hole 12 is located on the axis of the gearbox power input shaft 4. A bearing 13 is arranged between the motor power output shaft 2 and a motor power output shaft insertion hole 10 of the gearbox 7 outside the oil seal 11.

Claims

1. A motor spline lubricating structure comprises a motor power output shaft with an external spline at the end, a gearbox power input shaft with a shaft connecting hole at the front end, an internal spline on the hole wall of the connecting hole, a power output shaft inserted into the connecting hole of the gearbox power input shaft, an external spline on the end of the motor power output shaft embedded in the internal spline in the connecting hole, a front end and a rear end of the gearbox power input shaft connected in the gearbox through a bearing, the transmission is characterized in that a transmission cavity at the front end of a transmission power input shaft is directly communicated with the outer ring of a bearing at the front end of the transmission power input shaft, a transmission cavity at the rear end of the transmission power input shaft is directly communicated with the outer ring of a bearing at the rear end of the transmission power input shaft, an oil seal is arranged between a motor power output shaft inserting hole of the transmission and a motor power output shaft, and a through hole which is directly communicated with a connecting hole is formed at the rear end of the transmission power input shaft.

2. The motor spline lubrication structure of claim 1, wherein the perforations are located on an axis of a transmission power input shaft.