CN220488259U

CN220488259U - Speed reducer, electric drive assembly and vehicle

Info

Publication number: CN220488259U
Application number: CN202322223609.2U
Authority: CN
Inventors: 王永飞
Original assignee: Xiaomi Automobile Technology Co Ltd
Current assignee: Xiaomi Automobile Technology Co Ltd
Priority date: 2023-08-17
Filing date: 2023-08-17
Publication date: 2024-02-13
Anticipated expiration: 2033-08-17

Abstract

The utility model relates to a reduction gear, electricity drive assembly and vehicle, this reduction gear includes the casing, be provided with liquid cooling part and first liquid guide runner on the casing, first end of first liquid guide runner is used for being connected with the cooling part of motor, the second end of first liquid guide runner with liquid cooling part is connected, so that will flow through the coolant liquid water conservancy diversion of motor extremely liquid cooling part, liquid cooling part be used for cooling liquid to flow through and with the casing heat exchange. This reduction gear is through leading-in liquid cooling part of motor to the coolant liquid in the first liquid guide runner, realizes the heat dissipation of reduction gear, so need not set up structures such as oil pump, radiator, can greatly reduced cost, lightens the weight of the whole electric drive assembly that constitutes, satisfies the lightweight demand.

Description

Speed reducer, electric drive assembly and vehicle

Technical Field

The disclosure relates to the technical field of electric drive of new energy automobiles, in particular to a speed reducer, an electric drive assembly and a vehicle.

Background

The cooling mode of the speed reducer of the electric drive assembly in the related art mainly comprises oil cooling, namely an oil pump and a radiator are arranged, lubricating oil in the speed reducer is led out to the radiator through the oil pump, and is led back to the speed reducer after heat dissipation, but the arrangement cost is higher, the volume and the weight of the whole electric drive assembly can be increased, and the light-weight requirement of a vehicle is not met.

Disclosure of Invention

An object of the present disclosure is to provide a speed reducer, an electric drive assembly, and a vehicle, which solve the above-mentioned problems in the related art.

To achieve the above object, an aspect of the present disclosure provides a speed reducer, including a housing, a liquid cooling part and a first liquid guiding channel are provided on the housing, a first end of the first liquid guiding channel is used for being connected with a cooling part of a motor, a second end of the first liquid guiding channel is connected with the liquid cooling part so as to guide cooling liquid flowing through the motor to the liquid cooling part, and the liquid cooling part is used for cooling liquid to flow through and exchange heat with the housing.

Optionally, a through hole is formed in the shell wall of the shell, the through hole is set as the first liquid guide channel, a first end of the through hole penetrates out of the shell wall of the shell, and a second end of the through hole is connected with the liquid cooling component.

Optionally, the liquid cooling part includes holding tank and apron, the holding tank set up in the outer wall of casing, the apron lid is located the holding tank and with the casing is connected, the cell wall of holding tank is provided with feed liquor hole and play liquid hole, the feed liquor hole with the second end of first drain runner is connected.

Optionally, the groove wall and/or the groove bottom of the accommodating groove are/is formed with a heat radiation fin.

Optionally, the liquid cooling component further includes a first sealing ring, and the first sealing ring is clamped between the notch of the accommodating groove and the cover plate.

Optionally, the liquid cooling component is adjacent to a large disk tooth disposed within the housing.

The second aspect of the present disclosure also provides an electric drive assembly, including a motor and the above-mentioned decelerator, the decelerator connect in the motor, the motor is provided with cooling part, cooling part is used for supplying cooling liquid to flow through, the first end of the first liquid guide runner of decelerator with cooling part connects.

Optionally, the motor includes the casing, be provided with the water jacket on the casing, the water jacket sets up to cooling part, be provided with the second liquid guide runner on the casing, the first end of second liquid guide runner with the water jacket is connected, the casing of reduction gear with the casing is connected, makes the second end of second liquid guide runner with the first end of first liquid guide runner is connected.

Optionally, the electric drive assembly further includes a second sealing ring clamped between the housing and the shell and used for sealing a seam between the second end of the second liquid guiding channel and the first end of the first liquid guiding channel.

A third aspect of the present disclosure also provides a vehicle comprising the above-described speed reducer, or the above-described electric drive assembly.

Above-mentioned technical scheme comes the leading-in liquid cooling part of cooling part with the interior coolant liquid of motor through first liquid guide runner, along with the coolant liquid flows in liquid cooling part, can realize the heat exchange to can take away the heat of lubricating oil in the reduction gear, realize the heat dissipation of reduction gear, so do not need to set up structures such as oil pump, radiator, can greatly reduced cost, lighten the weight of the whole electric drive assembly that constitutes, satisfy the lightweight demand. In addition, through carrying out the water conservancy diversion with the coolant liquid in the cooling part of motor, can reuse coolant liquid for do not need to set up too much other structures, can avoid increasing weight, simultaneously through directly setting up first water conservancy diversion runner and liquid cooling part on the casing, can conveniently make, do not need additionally to increase other too much structures, also can avoid increasing weight.

Additional features and advantages of the present disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide a further understanding of the disclosure, and are incorporated in and constitute a part of this specification, illustrate the disclosure and together with the description serve to explain, but do not limit the disclosure. In the drawings:

FIG. 1 is a schematic structural view of a housing of one embodiment of the present disclosure;

fig. 2 is a partial cross-sectional view of an electro-drive assembly of one embodiment of the present disclosure.

Description of the reference numerals

1. The cooling device comprises a shell, 2, a liquid cooling component, 21, a containing groove, 22, a cover plate, 23, a liquid inlet hole, 24, a liquid outlet hole, 25, a radiating fin, 3, a first liquid guide flow passage, 4, a large disk tooth, 5, a motor, 51, a shell, 52, a cooling component, 53, a second liquid guide flow passage, 6 and a second sealing ring.

Detailed Description

Specific embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the disclosure, are not intended to limit the disclosure.

In the present disclosure, unless otherwise indicated, terms of orientation such as "upper, lower, left, right" are used generally in the direction of the drawing figures, and "inner, outer" refer to the inner, outer of the relevant parts. Furthermore, the terms "first," "second," and the like, are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

In the description of the present disclosure, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, directly connected, indirectly connected through an intermediary, or communicating between two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art as the case may be.

With the gradual development of new energy automobiles, the electric drive power is higher and higher, the heat dissipation requirement on a speed reducer is higher and higher, and meanwhile, in order to improve the endurance of the new energy automobiles, the requirement on light weight is higher and higher.

To this end, as shown in fig. 1, an aspect of the present disclosure provides a decelerator including a housing 1, a liquid cooling part 2 and a first liquid guiding passage 3 provided on the housing 1, a first end of the first liquid guiding passage 3 being connected to a cooling part 52 of a motor 5, a second end of the first liquid guiding passage 3 being connected to the liquid cooling part 2 to guide a cooling liquid flowing through the motor 5 to the liquid cooling part 2, the liquid cooling part 2 being for cooling liquid to flow through and exchange heat with the housing 1.

Wherein, liquid cooling part 2 and first liquid guiding runner 3 are on casing 1, and the cooling part 52 of motor 5 has the coolant, and it is used for cooling motor 5.

In the above technical scheme, the cooling liquid in the cooling part 52 of the motor 5 is led into the liquid cooling part 2 through the first liquid guide channel 3, and heat exchange can be realized along with the cooling liquid flowing in the liquid cooling part 2, so that heat of lubricating oil in the speed reducer can be taken away, heat dissipation of the speed reducer is realized, and thus the structure such as an oil pump and a radiator is not required, the cost can be greatly reduced, the weight of the whole electric drive assembly is reduced, and the light-weight requirement is met. In addition, through carrying out the water conservancy diversion with the coolant liquid in the cooling part 52 of motor 5, can reuse coolant liquid for need not set up too much other structures, can avoid increasing weight, simultaneously through directly setting up first water conservancy diversion runner 3 and liquid cooling part 2 on casing 1, can conveniently make, need not additionally increase other too much structures, also can avoid increasing weight.

As shown in fig. 1, optionally, in one embodiment of the present disclosure, a through hole is formed inside a wall of the housing 1, the through hole is set as a first liquid guiding channel 3, a first end of the through hole penetrates out of the wall of the housing 1, and a second end of the through hole is connected with the liquid cooling component 2.

The through-hole is inside the wall of the housing 1, i.e. not exposed. Through the arrangement, the flow guide of the cooling liquid can be facilitated, meanwhile, the weight of the shell 1 is reduced, and structures such as a pipeline and the like do not need to be additionally arranged on the shell 1, so that the weight of the shell 1 is prevented from being increased. In some examples, the through-hole extends in a straight direction from the motor 5 to the liquid cooling member 2, and a first end of the through-hole penetrates from a wall of the housing 1 toward one end of the motor 5, in other words, the first end of the through-hole is of an open structure, and a second end of the through-hole is toward the liquid cooling member 2.

Alternatively, in another embodiment of the present disclosure, the outer wall of the housing 1 may be provided with a diversion trench, the notch of the diversion trench is provided with a closing cap, and the diversion trench is provided as the first diversion channel 3. The cooling fluid can be guided in this way.

As shown in fig. 1, optionally, in one embodiment of the disclosure, the liquid cooling component 2 includes a containing groove 21 and a cover plate 22, where the containing groove 21 is opened on an outer wall of the housing 1, the cover plate 22 is covered on the containing groove 21 and connected with the housing 1, a liquid inlet 23 and a liquid outlet 24 are provided on a groove wall of the containing groove 21, and the liquid inlet 23 is connected with the second end of the first liquid guiding channel 3.

Wherein, the outer wall indent of casing 1 forms holding tank 21, and holding tank 21 can hold the coolant liquid for the coolant liquid flows in holding tank 21, takes away the heat. Through so setting, can directly form the holding tank 21 that holds the coolant liquid on casing 1, need not additionally set up other accommodation structure, can not increase weight, set up apron 22 simultaneously and can wash the maintenance to holding tank 21 to guarantee the cooling radiating effect.

It will be appreciated that the cooling liquid is delivered to the liquid inlet hole 23 through the first liquid guiding channel 3, enters the accommodating groove 21, and then flows in the accommodating groove 21 to carry away heat transferred from the lubricating oil in the speed reducer to the casing 1 and flows out of the liquid outlet hole 24. In some examples, the exit orifice 24 may be in communication with a coolant recovery end to effect a coolant circulation flow.

Alternatively, in another embodiment of the present disclosure, the liquid cooling member 2 includes a heat exchanger connected to the outer wall of the housing 1. The cooling liquid flows through and exchanges heat with the casing 1 by a heat exchanger which is independent from the outside of the casing 1. The heat exchanger can be a heat exchange pipeline, the heat exchange pipeline is in snake-shaped distribution, and two ends of the heat exchange pipeline can be provided with a liquid inlet hole 23 and a liquid outlet hole 24 for guiding in and guiding out cooling liquid.

As shown in fig. 1, optionally, in one embodiment of the present disclosure, a groove wall and/or a groove bottom of the accommodating groove 21 is formed with a heat radiating fin 25. Through the radiating fin 25 that sets up can increase the area of contact with the coolant liquid, the coefficient of heat conductivity of radiating fin 25 is higher simultaneously, can do benefit to heat transfer to the holding tank 21 in with the coolant liquid carries out the heat exchange, takes away the heat by the coolant liquid. In some examples, the heat radiating fins 25 are formed at the bottom of the accommodating groove 21, the number of the heat radiating fins 25 is several, and the heat radiating fins 25 are disposed at intervals from each other so that the cooling liquid flows therethrough.

Optionally, in one embodiment of the present disclosure, the liquid cooling component 2 further includes a first sealing ring, and the first sealing ring is clamped between the notch of the accommodating groove 21 and the cover plate 22. The gap between the notch of the accommodation groove 21 and the cover plate 22 can be sealed by the first seal ring provided to prevent leakage of the coolant. In some examples, a mounting groove may be provided on a side of the cover plate 22 facing the notch of the accommodating groove 21, and the first seal ring may be mounted in the mounting groove, so as to achieve limiting of the first seal ring.

Alternatively, in one embodiment of the present disclosure, the liquid cooling member 2 is proximate to large disk teeth 4 disposed within the housing 1. By such arrangement, the liquid cooling component 2 can easily take away the heat of the lubricating oil, and the heat dissipation and cooling effects on the speed reducer are improved. Wherein, big dish tooth 4 rotates and sets up in casing 1, and lubricating oil also is located casing 1, and big dish tooth 4 can roll up lubricating oil and get rid of to on the inner wall of casing 1 when rotating, and the heat of lubricating oil mainly concentrates in the inner wall position of casing 1 that is close to big dish tooth 4.

As shown in fig. 2, the second aspect of the present disclosure further provides an electric drive assembly, including the motor 5 and the above-mentioned speed reducer, the speed reducer is connected to the motor 5, the motor 5 is provided with a cooling component 52, the cooling component 52 is used for flowing cooling liquid, and a first end of the first liquid guiding channel 3 of the speed reducer is connected to the cooling component 52.

The cooling component 52 is used for cooling structures such as a stator and a rotor of the motor 5, the cooling liquid in the cooling component 52 can take away heat when flowing, and the first end of the first liquid guide channel 3 of the speed reducer is connected with the cooling component 52, so that the cooling liquid can be guided to the speed reducer, the cooling liquid can be reused, the heat of the speed reducer is taken away, the influence on the liquid cooling heat dissipation of the original electric drive is small, the whole layout of the vehicle is convenient, and the manufacturing cost can be reduced.

As shown in fig. 2, alternatively, in one embodiment of the present disclosure, the motor 5 includes a casing 51, a water jacket is provided on the casing 51, the water jacket is provided as a cooling member 52, a second liquid guiding flow passage 53 is provided on the casing 51, a first end of the second liquid guiding flow passage 53 is connected to the water jacket, and the housing 1 of the speed reducer is connected to the casing 51, such that a second end of the second liquid guiding flow passage 53 is connected to a first end of the first liquid guiding flow passage 3.

The water jacket is a containing cavity formed on the casing 51 and is used for cooling liquid to flow through to take away heat on the casing 51. And the second liquid guide passage 53 may guide the cooling liquid to the first liquid guide passage 3 so that the cooling liquid enters the liquid cooling member 2.

In some examples, the second liquid guide channel 53 is formed inside the wall of the casing 51, and there is no need to provide an excessive number of external pipes on the casing 51, so as to avoid increasing the weight of the electric drive assembly. The first end of the second liquid guide channel 53 is communicated with the water jacket, the second end of the second liquid guide channel 53 extends towards the end face of the casing 51 towards one end of the speed reducer and is in an open structure, so that the second end of the second liquid guide channel 53 hole is communicated with the first end of the first liquid guide channel 3, and conveying of cooling liquid is achieved.

Alternatively, in another embodiment of the present disclosure, the motor 5 includes a housing 51, and the cooling component 52 may be a heat exchanger, where the heat exchanger is connected to an outer wall of the housing 51, and the heat exchanger includes a heat exchange pipe and is attached to the outer wall of the housing 51. This can carry away the heat from the casing 51 and realize cooling.

Optionally, in one embodiment of the disclosure, the electric drive assembly further includes a second sealing ring 6, where the second sealing ring 6 is clamped between the housing 1 and the shell 51 and is used to close a seam between the second end of the second liquid guiding channel 53 and the first end of the first liquid guiding channel 3. By means of the second sealing ring 6, it is possible to avoid leakage of the coolant at the joint of the second end of the second liquid guiding channel 53 and the first end of the first liquid guiding channel 3. In some examples, the opposite side of the housing 1 or the casing 51 may be provided with a placement groove for placing the second sealing ring 6, so as to achieve a limit of the second sealing ring 6.

The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solutions of the present disclosure within the scope of the technical concept of the present disclosure, and all the simple modifications belong to the protection scope of the present disclosure.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, the present disclosure does not further describe various possible combinations.

Moreover, any combination between the various embodiments of the present disclosure is possible as long as it does not depart from the spirit of the present disclosure, which should also be construed as the disclosure of the present disclosure.

Claims

1. The utility model provides a reduction gear, its characterized in that includes the casing, be provided with liquid cooling part and first liquid guide runner on the casing, first end of first liquid guide runner is used for being connected with the cooling part of motor, the second end of first liquid guide runner with liquid cooling part is connected, with the coolant liquid water conservancy diversion that will flow through the motor extremely liquid cooling part, liquid cooling part is used for supplying the coolant liquid to flow through and with the casing heat exchange.

2. The speed reducer according to claim 1, wherein a through hole is formed in the wall of the housing, the through hole is configured as the first liquid guide channel, a first end of the through hole penetrates out of the wall of the housing, and a second end of the through hole is connected with the liquid cooling component.

3. The speed reducer of claim 1, wherein the liquid cooling component comprises a containing groove and a cover plate, the containing groove is formed in the outer wall of the shell, the cover plate is covered on the containing groove and connected with the shell, a liquid inlet hole and a liquid outlet hole are formed in the groove wall of the containing groove, and the liquid inlet hole is connected with the second end of the first liquid guide runner.

4. A decelerator according to claim 3 in which the walls and/or bottoms of the accommodating grooves are formed with heat radiating fins.

5. A decelerator according to claim 3 wherein the liquid cooling member further comprises a first sealing ring clamped between the notch of the receiving groove and the cover plate.

6. The speed reducer of any of claims 1-5, wherein the liquid cooled component is proximate to a large disk tooth disposed within the housing.

7. An electric drive assembly comprising an electric motor and a decelerator according to any one of claims 1-6, said decelerator being connected to said electric motor, said electric motor being provided with a cooling member for flowing a cooling liquid therethrough, a first end of a first liquid-conducting channel of said decelerator being connected to said cooling member.

8. The electric drive assembly of claim 7, wherein the motor includes a housing having a water jacket disposed thereon, the water jacket being configured as the cooling member, the housing having a second fluid conduction path disposed thereon, a first end of the second fluid conduction path being coupled to the water jacket, the housing of the speed reducer being coupled to the housing such that a second end of the second fluid conduction path is coupled to the first end of the first fluid conduction path.

9. The electrical drive assembly of claim 8, further comprising a second seal ring clamped between the housing and the case and configured to close a seam between the second end of the second fluid conduit and the first end of the first fluid conduit.

10. A vehicle comprising a speed reducer according to any one of claims 1 to 6, or an electric drive assembly according to any one of claims 7 to 9.