CN218761311U

CN218761311U - Left shell of reducer of electric-drive oil cooling system

Info

Publication number: CN218761311U
Application number: CN202223146837.6U
Authority: CN
Inventors: 孙敏; 孙生; 陈小龙; 卢国成; 杜长虹
Original assignee: Chongqing Changan Automobile Co Ltd
Current assignee: Chongqing Changan Automobile Co Ltd
Priority date: 2022-11-26
Filing date: 2022-11-26
Publication date: 2023-03-28
Anticipated expiration: 2032-11-26

Abstract

The utility model discloses an electricity drives cold left casing of system reduction gear of oil, including left casing body and check valve, the right side of left side casing body is provided with opening direction and connects cavity towards left rotor connection cavity and stator connection cavity, the left side of left side casing body is provided with opening direction and connects the reduction gear main cavity chamber towards the right side, the lower part of reduction gear main cavity chamber is provided with the valve body mount pad, the inside of valve body mount pad is provided with the oil gallery, the oil gallery makes reduction gear main cavity chamber simultaneously with cavity and stator connection cavity are connected to the rotor, the check valve has left side oil feed end and right side oil outlet end, left side oil feed end with the left end of oil gallery is connected, right side oil outlet end is located in the reduction gear main cavity chamber. The utility model discloses can prevent that reduction gear main cavity indoor internal cooling fluid is whole to flow in the motor to prevent that oil pump "to inhale empty" phenomenon from taking place, guarantee that the fluid circulation does not break, guarantee to drive the reliability of oily cold system electrically.

Description

Left shell of electric drive oil cooling system speed reducer

Technical Field

The utility model relates to an electricity drives oil cooling system, concretely relates to electricity drives oil cooling system reduction gear left side casing.

Background

At present, with the rapid development of the new energy automobile industry, the electric drive performance is continuously increased. The electric drive needs high functional density torque density, small size and compact structure, and needs to control the heat of the motor to maximally excavate the maximum output potential of the motor, so that the lubrication and cooling system for solving the problem is particularly important. Adopt the oil cooling exchange to replace the effectual lubricated cooling problem of solving of traditional water-cooling exchange at present, but when the electricity drives the heeling, fluid can be from all flow direction motor cavity in the reduction gear inner chamber, leads to oil pump "to inhale empty" phenomenon to take place, causes fluid circulation to break, influences the reliability of the cold system of electricity drive oil.

CN115076347A discloses a reducer assembly for oil-cooled electric driving, which comprises a left shell, a right shell, a left shell and a right shell which are folded to form a reducer box, an input shaft assembly, an intermediate shaft assembly and a differential assembly are supported in the reducer box through bearings, a fine filter, a coarse filter, an oil pump and an oil cooler are installed outside the left shell, a lubricating oil pipe is installed in the left shell, an upstream end of the lubricating oil pipe is communicated with the fine filter through an oil passage in the left shell, a downstream end of the lubricating oil pipe is communicated with the oil cooler through an oil passage in the left shell, a plurality of oil injection ports are arranged on the lubricating oil pipe, a plurality of oil grooves and oil guide plates are arranged in the left shell and the right shell, the left shell and the right shell are provided with oil passages which are communicated with each other, a vent valve is arranged on the reducer box, the input shaft is a hollow shaft, an oil delivery pipe is arranged in an inner hole of the input shaft, an upstream end of the oil delivery pipe is communicated with the oil cooler through an oil passage in the reducer box, a downstream end of the oil delivery pipe is communicated with a motor rotor shaft, and a plurality of oil return holes are arranged on the reducer box. Needless to say, the technical solution disclosed in the above patent document is a useful attempt in the technical field.

Disclosure of Invention

In view of this, the utility model aims at providing an electricity drive oil cooling system reduction gear left side casing can prevent that reduction gear main cavity indoor cooling fluid is whole to flow in the motor to prevent that the oil pump from "inhaling empty" phenomenon from taking place, guarantee that the fluid circulation is uninterrupted, guarantee to drive the reliability of oil cooling system by electricity.

The utility model provides an electricity drive cold left casing of system reduction gear of oil, including left casing body and check valve, the right side of left side casing body is provided with opening direction and connects cavity towards left rotor and stator connection cavity, the left side of left side casing body is provided with opening direction and connects the cavity towards right reduction gear main cavity, the lower part of reduction gear main cavity is provided with the valve body mount pad, the inside of valve body mount pad is provided with the oil gallery, the oil gallery makes reduction gear main cavity simultaneously with cavity and stator connection cavity are connected to the rotor, the check valve has left side oil feed end and right side oil outlet end, left side oil feed end with the left end of oil gallery is connected, right side oil outlet end is located in the reduction gear main cavity.

Further, the rotor connecting cavity and the stator connecting cavity are communicated with the right end of the oil return hole.

Further, the check valve comprises a valve tube body and a valve core assembly, wherein a middle hole which penetrates through the valve tube body along the left-right direction is formed in the valve tube body, and the valve core assembly comprises a left valve seat, a ball core, a spring and a right valve seat which are sequentially arranged in the middle hole from left to right; and when no external force acts, the spring enables the ball core to abut against the left valve seat.

Furthermore, an external thread is arranged on the outer wall of the left side of the valve body, the oil return hole is a threaded hole, and the oil inlet end of the left side of the one-way valve is in threaded connection with the oil return hole.

Further, the valve body mounting seat is positioned at the rear part of the lower part of the main chamber of the speed reducer.

Further, be provided with input shaft installation via hole, first speed reduction shaft installation via hole and the installation via hole of second speed reduction shaft that set gradually from the back to the front on the left side casing body.

Further, the height position of the axis of the input shaft mounting through hole and the height position of the axis of the second speed reduction shaft mounting through hole are both higher than the height position of the axis of the first speed reduction shaft mounting through hole.

Further, the valve body mounting seat is located below the input shaft mounting through hole.

Further, the rotor connection chamber is located above the stator connection chamber.

Furthermore, the left shell body is of an integrally formed structure.

The utility model has the advantages that:

1. the utility model discloses when using, rotor connection cavity and stator connection cavity all are linked together through oil gallery and reduction gear main cavity, cooling fluid in the rotor of motor can get into in the reduction gear main cavity through oil gallery and check valve, cooling fluid in the stator of motor can get into in the reduction gear main cavity through oil gallery and check valve, in order to form the oil cooling system oil circuit circulation, when the electricity drives the left bank, the check valve can prevent that the cooling fluid in the reduction gear main cavity is all to flow in the motor, thereby prevent that the oil pump "inhales the sky" phenomenon and take place, guarantee that the fluid circulation does not break, guarantee the reliability of electricity drive oil cooling system;

2. the utility model discloses processing is simple, low in production cost, and the check valve dismouting of being convenient for is changed simultaneously.

Drawings

In order to make the purpose, technical scheme and beneficial effect of the utility model clearer, the utility model provides a explain as follows the attached drawing:

fig. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is a schematic view of the present invention;

fig. 3 is a right-side view of the present invention.

The drawings are numbered as follows:

1-a left shell body, 11-a rotor connecting cavity, 12-a stator connecting cavity, 13-a speed reducer main cavity, 14-a valve body mounting seat, 15-an oil return hole, 16-an input shaft mounting through hole, 17-a first speed reduction shaft mounting through hole and 18-a second speed reduction shaft mounting through hole;

2-one-way valve, 21-left oil inlet end, 22-right oil outlet end, 23-valve tube body, 24-left valve seat, 25-ball core, 26-spring and 27-right valve seat.

Detailed Description

The present invention is described below with reference to the accompanying drawings and examples the novel technical scheme is explained in detail.

As shown in fig. 1-3, an electricity drive oil cooling system reduction gear left side casing in this embodiment, including left casing body 1 and check valve 2, the right side of left casing body 1 is provided with opening direction and connects cavity 11 and stator connection cavity 12 towards the rotor that left side, the left side of left casing body 1 is provided with opening direction and connects cavity 13 towards the right reduction gear main cavity 13, the lower part of reduction gear main cavity 13 is provided with valve body mount pad 14, the inside of valve body mount pad 14 is provided with oil gallery 15, oil gallery 15 makes reduction gear main cavity 13 simultaneously with cavity 11 and stator connection cavity 12 are connected to the rotor and are linked together, check valve 2 has left side oil feed end 21 and right side oil outlet 22, left side oil feed end 21 with oil gallery 15's left end is connected, right side oil outlet 22 is located in reduction gear main cavity 13. The left shell of the reducer of the electrically-driven oil cooling system is one of important parts of the reducer, when the reducer is used, the left shell of the reducer of the electrically-driven oil cooling system, the right shell and the reducer gear set are assembled to form the reducer, the reducer is connected with a motor, a rotor connecting cavity 11 is used for being matched with a rotor of the motor, the stator connection is strong for being matched with a stator of the motor, the rotor connecting cavity 11 and a stator connecting cavity 12 are communicated with a main cavity 13 of the reducer through oil return holes 15, cooling oil in the rotor of the motor can enter the main cavity 13 of the reducer through the oil return holes 15 and the one-way valve 2, the cooling oil in the stator of the motor can enter the main cavity 13 of the reducer through the oil return holes 15 and the one-way valve 2 to form oil cooling system oil circuit circulation, when the electrically-driven oil cooling system inclines left, the one-way valve 2 can prevent all cooling oil in the main cavity 13 of the reducer from flowing into the oil pump, thereby preventing the phenomenon of 'suction', ensuring that the oil circulation is not interrupted, and ensuring the reliability of the electrically-driven oil cooling system.

In this embodiment, the rotor connecting chamber 11 and the stator connecting chamber 12 are both communicated with the right end of the oil return hole 15. The oil return hole 15 is simultaneously connected with the rotor connecting cavity 11 and the stator connecting cavity 12, oil return paths do not need to be respectively arranged for the rotor and the stator of the motor, the number of the oil paths on the left shell of the electric drive oil cooling system speed reducer can be reduced, and the processing difficulty is reduced.

In this embodiment, the check valve 2 includes a valve tube body 23 and a valve core assembly, a central hole penetrating along the left-right direction is formed in the valve tube body 23, and the valve core assembly includes a left valve seat 24, a ball core 25, a spring 26 and a right valve seat 27 which are sequentially arranged in the central hole from left to right; when no external force is applied, the spring 26 presses the ball core 25 against the left valve seat 24. During oil return, cooling oil from a stator and a rotor of the motor acts on the surface of the ball core 25, the cooling oil exerts pressure on the surface of the ball core 25 and can overcome the elasticity of the spring 26, the ball core 25 moves towards the direction far away from the left valve seat 24, the one-way valve 2 enables the cooling oil to normally flow into the speed reducer from the stator and the rotor of the motor, when the electric driving is performed to the left, the cooling oil can enable the ball core 25 to abut against the left valve seat 24 in a counter-flow mode, the one-way valve 2 enables the cooling oil not to flow into the stator and the rotor of the motor from the speed reducer, therefore, the phenomenon of 'air suction' of an oil pump is prevented, the oil circulation is not interrupted, and the reliability of an electric driving oil cooling system is guaranteed.

In this embodiment, be provided with the external screw thread on the left side outer wall of valve body 23, oil return hole 15 is the screw hole, the left side oil feed end 21 of check valve 2 with 15 threaded connection of oil return hole, the processing of external screw thread and screw hole is all very simple and convenient, low in manufacturing cost, and the dismouting is all very simple simultaneously, is convenient for change.

In this embodiment, the valve body mounting seat 14 is located at the rear of the lower portion of the main chamber 13 of the speed reducer; in this embodiment, the left housing body 1 is provided with an input shaft mounting through hole 16, a first speed reduction shaft mounting through hole 17 and a second speed reduction shaft mounting through hole 18 which are sequentially arranged from back to front; in this embodiment, the height position of the axis of the input shaft mounting through hole 16 and the height position of the axis of the second reduction shaft mounting through hole 18 are both higher than the height position of the axis of the first reduction shaft mounting through hole 17; in this embodiment, the valve body mounting seat 14 is located below the input shaft mounting through hole 16; in this embodiment, the rotor connecting chamber 11 is located above the stator connecting chamber 12. The input shaft mounting through hole 16, the first speed reduction shaft mounting through hole 17 and the second speed reduction shaft mounting through hole 18 are used for mounting a speed reducer gear set of a speed reducer, and through reasonable layout, a large distance is reserved between the check valve 2 and the speed reducer gear set, so that interference between the check valve 2 and the speed reducer gear set of the speed reducer is prevented.

In this embodiment, the left housing body 1 is an integrally formed structure. After the left shell body 1 is formed by casting, the oil return hole 15, the input shaft mounting through hole 16, the first speed reduction shaft mounting through hole 17, the second speed reduction shaft mounting through hole 18 and other features are processed.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides an electricity drives cold system of oil reduction gear left side casing which characterized in that: including left casing body (1) and check valve (2), the right side of left side casing body (1) is provided with opening direction and connects cavity (11) and stator connection cavity (12) towards the rotor on left, the left side of left side casing body (1) is provided with opening direction reduction gear main cavity (13) towards the right side, the lower part of reduction gear main cavity (13) is provided with valve body mount pad (14), the inside of valve body mount pad (14) is provided with oil gallery (15), oil gallery (15) make reduction gear main cavity (13) simultaneously with cavity (11) and stator connection cavity (12) are connected to the rotor, check valve (2) have left side oil feed end (21) and right side oil outlet end (22), left side oil feed end (21) with the left end of oil gallery (15) is connected, right side oil outlet end (22) are located in reduction gear main cavity (13).

2. The electrically driven oil cooling system retarder left housing of claim 1, further comprising: and the rotor connecting cavity (11) and the stator connecting cavity (12) are communicated with the right end of the oil return hole (15).

3. The electrically driven oil cooling system retarder left housing of claim 1, further comprising: the check valve (2) comprises a valve pipe body (23) and a valve core assembly, a middle hole penetrating along the left-right direction is formed in the valve pipe body (23), and the valve core assembly comprises a left valve seat (24), a ball core (25), a spring (26) and a right valve seat (27) which are sequentially arranged in the middle hole from left to right; when no external force acts, the spring (26) enables the ball core (25) to abut against the left valve seat (24).

4. The electrically driven oil cooling system retarder left housing of claim 3, wherein: the left side outer wall of the valve body (23) is provided with an external thread, the oil return hole (15) is a threaded hole, and the left side oil inlet end (21) of the one-way valve (2) is in threaded connection with the oil return hole (15).

5. The electrically driven oil cooling system retarder left housing of claim 1, further comprising: the valve body mounting seat (14) is positioned at the rear part of the lower part of the main speed reducer chamber (13).

6. The electrically driven oil cooling system retarder left housing of claim 5, wherein: the left shell body (1) is provided with an input shaft installation through hole (16), a first speed reduction shaft installation through hole (17) and a second speed reduction shaft installation through hole (18) which are sequentially arranged from back to front.

7. The electrically driven oil cooling system speed reducer left shell according to claim 6, characterized in that: the height position of the axis of the input shaft mounting through hole (16) and the height position of the axis of the second speed reduction shaft mounting through hole (18) are both higher than the height position of the axis of the first speed reduction shaft mounting through hole (17).

8. The electrically driven oil cooling system retarder left housing of claim 6, wherein: the valve body mounting seat (14) is located below the input shaft mounting through hole (16).

9. The electrically driven oil cooling system retarder left housing of claim 1, further comprising: the rotor connecting chamber (11) is located above the stator connecting chamber (12).

10. The electrically driven oil cooling system retarder left housing of claim 1, further comprising: the left shell body (1) is of an integrally formed structure.