CN214248235U

CN214248235U - Speed reducer and vehicle with same

Info

Publication number: CN214248235U
Application number: CN202120203659.2U
Authority: CN
Inventors: 王亚东; 骆平原; 熊亮; 魏波; 宋国伟
Original assignee: Great Wall Motor Co Ltd
Current assignee: Great Wall Motor Co Ltd
Priority date: 2021-01-25
Filing date: 2021-01-25
Publication date: 2021-09-21
Anticipated expiration: 2031-01-25

Abstract

The utility model provides a reduction gear and vehicle that has it, the reduction gear includes: the speed reducer comprises a speed reducer shell, a speed reducer shell and a control device, wherein an accommodating cavity is formed in the speed reducer shell; the transmission shaft assembly is arranged in the accommodating cavity; and the other end of the ventilation plug oil passage is communicated with the mounting position of the bearing of the transmission shaft assembly. From this, the cooperation of breather plug oil duct and transmission shaft subassembly for the fluid of transmission shaft subassembly department can not follow breather plug one side outflow under the effect of the centrifugal force when the high-speed operation of transmission shaft subassembly, prevents that the condition of oil leak, oil spout from taking place, promotes the reliability of reduction gear. Meanwhile, an oil duct labyrinth structure is not required to be designed in the reducer shell, so that the structural complexity of the reducer shell is reduced, the reducer shell is simple in structure and easy to process, and the development cost can be reduced.

Description

Speed reducer and vehicle with same

Technical Field

The utility model relates to the technical field of vehicles, in particular to reduction gear and vehicle that has it.

Background

With the wide application of new energy vehicle types, electric drive systems gradually mature and various power systems begin to emerge.

In the related art, a labyrinth structure is generally provided in the reduction gear to prevent oil leakage and oil spray at the breather plug. However, the labyrinth structure is complex, the processing difficulty is high, and the development cost is increased.

SUMMERY OF THE UTILITY MODEL

In view of this, the present invention is directed to a speed reducer to prevent the oil injection of the vent plug.

In order to achieve the above purpose, the technical scheme of the utility model is realized like this:

a decelerator, comprising: the speed reducer comprises a speed reducer shell, a speed reducer shell and a control device, wherein an accommodating cavity is formed in the speed reducer shell; the transmission shaft assembly is arranged in the accommodating cavity; and the other end of the ventilation plug oil passage is communicated with the mounting position of the bearing of the transmission shaft assembly.

According to some embodiments of the invention, the breather plug oil passage comprises: the bearing comprises a first oil duct and a second oil duct, wherein the first oil duct is communicated with the second oil duct, the first oil duct is communicated with the outside, and the second oil duct is communicated with the mounting position of the bearing.

According to some embodiments of the invention, the second oil duct extends along an axial direction of the driveshaft assembly.

According to some embodiments of the invention, the first oil duct extends in a direction perpendicular to the second oil duct.

According to some embodiments of the invention, the second oil duct is provided in a central position of the bearing.

According to some embodiments of the utility model, the transmission shaft subassembly is a plurality of, the breather plug oil duct with the position is the highest in vertical direction the installation position switch-on of transmission shaft subassembly's bearing.

According to the utility model discloses a some embodiments, the retarder casing is equipped with the draining groove, the draining groove with the installation position of bearing corresponds to make the fluid of bearing department flow from the draining groove.

According to some embodiments of the present invention, the reducer further comprises: and the vent plug is arranged at the end part of the vent plug oil channel.

Compared with the prior art, the speed reducer has the following advantages:

the cooperation of breather plug oil duct and transmission shaft subassembly for the fluid of transmission shaft subassembly department can not flow from breather plug one side under the effect of the centrifugal force when the high-speed operation of transmission shaft subassembly, prevents that the condition of oil leak, oil spout from taking place, promotes the reliability of reduction gear. Meanwhile, an oil duct labyrinth structure is not required to be designed in the reducer shell, so that the structural complexity of the reducer shell is reduced, the reducer shell is simple in structure and easy to process, and the development cost can be reduced.

Another object of the present invention is to provide a vehicle.

a vehicle comprises the speed reducer.

The vehicle has the same advantages as the retarder described above with respect to the prior art, and will not be described in detail here.

Drawings

The accompanying drawings, which form a part hereof, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without undue limitation. In the drawings:

fig. 1 is a schematic structural diagram of a speed reducer according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a sectional view of a speed reducer according to an embodiment of the present invention.

Description of reference numerals:

a speed reducer 100,

A reducer shell 10, an oil drainage groove 11,

A transmission shaft assembly 20,

A breather plug gallery 30, a first gallery 31, a second gallery 32,

A vent plug 40.

Detailed Description

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

According to the utility model discloses reduction gear 100 includes: the reducer casing 10 is formed with and holds the chamber, and reduction gear casing 10 and transmission shaft assembly 20 set up in hold the intracavity.

The reducer casing 10 is provided with a breather plug oil passage 30, one end of the breather plug oil passage 30 is communicated with the outside of the reducer casing 10, and the other end of the breather plug oil passage 30 is communicated with the mounting position of the bearing of the transmission shaft assembly 20. The vent plug oil passage 30 communicates the accommodating cavity with the outside of the reducer case 10, and the pressure inside the reducer case 10 can be adjusted by the vent plug 40 to balance the air pressure inside and outside the reducer case 10, thereby assisting in heat dissipation.

It can be understood that when the decelerator 100 is in operation, the temperature of the decelerator 100 will change, which results in the change of the gas pressure in the accommodating chamber, and the vent plug 40 can balance the gas pressure inside and outside the decelerator casing 10, thereby improving the reliability of the decelerator 100.

Further, since the end of the breather plug oil passage 30 is disposed at the bearing, the oil in the breather plug oil passage 30 does not move to the other end of the breather plug oil passage 30 by the bearing, so as to prevent the oil from flowing out of the speed reducer case 10 from the breather plug oil passage 30.

Specifically, when the speed reducer 100 operates, the transmission shaft assembly 20 rotates to tell the rotating transmission shaft assembly 20 that the oil entering the position can be thrown out, so that the oil is ensured not to flow out from the breather plug oil passage 30 by using centrifugal force, oil leakage is prevented, the reliability of the speed reducer 100 is improved, and the speed reducer is simple in structure and easy to process.

It should be noted that, by connecting the oil passage 30 of the breather plug with the mounting position of the bearing, the problems of oil leakage and oil injection at the breather plug 40 can be effectively prevented, and it is not necessary to design an oil passage labyrinth structure in the reducer case 10, so that the structural complexity of the reducer case 10 is reduced, and the reducer case 10 is easy to process. The oil gallery labyrinth is generally used to limit the flow direction of oil in the reducer casing 10, and to return the oil in the oil gallery labyrinth to the bottom of the reducer casing 10, so as to prevent the oil from flowing out of the breather plug 40. The breather plug oil passage 30 in the present application can effectively prevent oil from flowing out from the breather plug 40 by the cooperation with the propeller shaft assembly 20 under the action of centrifugal force when the propeller shaft assembly 20 is operated at high speed.

According to the utility model discloses reduction gear 100, breather plug oil duct 30 and transmission shaft subassembly 20 cooperation for the fluid of transmission shaft subassembly 20 department can not flow from breather plug 40 one side under the effect of the centrifugal force when transmission shaft subassembly 20 high-speed operation, prevents that the condition of oil leak, oil spout from taking place, promotes reduction gear 100's reliability. Meanwhile, an oil passage labyrinth structure does not need to be designed in the reducer housing 10, so that the structural complexity of the reducer housing 10 is reduced, the reducer housing 10 is simple in structure and easy to process, and development cost can be reduced.

In some embodiments of the present invention, the speed reducer 100 further includes: and the vent plug 40 is arranged at the end part of the vent plug oil channel 30, and the vent plug 40 is arranged at the end part of the vent plug oil channel 30. The vent plug 40 can adjust the pressure inside the retarder housing 10 to balance the air pressure inside and outside the retarder housing 10 to assist in heat dissipation.

In some embodiments of the present invention, as shown in fig. 2, the breather plug oil passage 30 includes: the bearing assembly comprises a first oil channel 31 and a second oil channel 32, wherein the first oil channel 31 is communicated with the second oil channel 32, the first oil channel 31 is communicated with the outside, and the second oil channel 32 is communicated with a mounting position of a bearing.

It can be understood that the breather plug oil passage 30 includes two oil passages, so that the breather plug oil passage 30 can be extended to the bearing according to design requirements, and the processing difficulty of the breather plug oil passage 30 is reduced.

In the utility model discloses in further embodiment, as shown in fig. 2, second oil duct 32 extends along transmission shaft assembly 20's axial direction to can promote second oil duct 32 and transmission shaft assembly 20's cooperation effect, make full use of transmission shaft assembly 20's centrifugal force prevents that fluid from flowing out from first oil duct 31 with the fluid flow direction in the restriction second oil duct 32.

In other embodiments of the present invention, the extending direction of the first oil passage 31 is perpendicular to the extending direction of the second oil passage 32, so that the difficulty of the oil entering the first oil passage 31 in the second oil passage 32 can be increased, the oil is further prevented from entering the first oil passage 31 from the second oil passage 32, and the reliability of the speed reducer 100 is improved.

In some embodiments of the present invention, referring to fig. 1, a breather plug 40 is provided at the top of the reducer case 10. Referring to fig. 2, the first oil passage 31 extends to a position corresponding to the driveshaft assembly 20 in a vertical direction and communicates with the second oil passage 32, and the second oil passage 32 may extend in an axial direction of the driveshaft assembly 20, where an extending direction of the first oil passage 31 and an extending direction of the second oil passage 32 are perpendicular to each other.

It will be appreciated that disposing the breather plug 40 at the top of the retarder housing 10 facilitates venting of the gas within the retarder housing 10.

The utility model discloses an in some embodiments, referring to fig. 3, second oil duct 32 sets up in the central point of bearing and puts to be convenient for second oil duct 32 and transmission shaft assembly 20 correspond the cooperation, reduce the machine-shaping degree of difficulty of second oil duct 32, guarantee the structural strength of second oil duct 32 department simultaneously, promote reduction gear 100's reliability.

In some embodiments of the present invention, as shown in fig. 3, the transmission shaft assembly 20 is multiple, and the vent plug oil passage 30 is communicated with the mounting position of the bearing of the transmission shaft assembly 20 which is positioned at the highest position in the vertical direction, so as to correspond the vent plug oil passage 30 to the transmission shaft assembly 20.

Referring to fig. 3, the decelerator 100 is provided with three driving shaft assemblies 20, and driving force can be transmitted between the three driving shaft assemblies 20. It can be understood that the breather plug 40 is arranged at the top of the reducer casing 10, and the arrangement mode of extending the breather plug oil passage 30 to the highest transmission shaft assembly 20 can ensure the oil limiting effect of the transmission shaft assembly 20 under the condition of reasonably shortening the length of the breather plug oil passage 30.

It should be noted that, in the speed reducer 100, a large amount of oil exists at the bottom of the housing, so that there is a case where a portion of the propeller shaft assembly 20 is immersed in the oil, and the breather plug oil passage 30 is not suitable for cooperation with the propeller shaft assembly 20 at such a position.

In some embodiments of the present invention, in conjunction with fig. 2 and 3, the driveshaft assembly 20 can be an input shaft assembly, an intermediate shaft assembly, and an output shaft assembly. The breather plug oil passage 30 corresponds to the intermediate shaft assembly, i.e., the second oil passage 32 corresponds to a bearing of the intermediate shaft assembly.

Of course, the present application is not limited thereto, and the breather plug gallery 30 may also correspond to a bearing of the input shaft assembly. The position and extending direction of the breather plug oil channel 30 can be adjusted according to the arrangement mode and position of the transmission shaft assembly 20 in the reducer case 10 and the structure of the case.

The utility model discloses an in some embodiments, reduction case 10 is equipped with draining groove 11, and draining groove 11 corresponds with the installation position of bearing to make the fluid of bearing department flow out from draining groove 11.

Specifically, the oil drainage groove 11 extends along the radial direction of the transmission shaft assembly 20, and oil at the bearing is thrown out from the oil drainage groove 11 under the action of the centrifugal force of the transmission shaft assembly 20, so that the oil is prevented from flowing out from the breather plug oil passage 30.

According to the embodiment of the present invention, the vehicle includes the above-mentioned speed reducer 100. The speed reducer 100 can throw the oil out of the oil drainage groove 11 by using the centrifugal force generated when the transmission shaft assembly 20 rotates at a high speed, so that the oil is prevented from flowing out of the vent plug oil passage 30, and the speed reducer has high safety and reliability, and is simple in structure and easy to process.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A decelerator (100) comprising:

the speed reducer comprises a speed reducer shell (10), wherein an accommodating cavity is formed in the speed reducer shell (10);

a driveshaft assembly (20), the driveshaft assembly (20) disposed within the receiving cavity;

the transmission shaft assembly comprises a breather plug oil passage (30), wherein the breather plug oil passage (30) is arranged in the speed reducer shell (10), one end of the breather plug oil passage (30) is communicated with the outside, and the other end of the breather plug oil passage (30) is communicated with an installation position of a bearing of the transmission shaft assembly (20).

2. The retarder (100) of claim 1, wherein the breather plug gallery (30) includes: the bearing comprises a first oil channel (31) and a second oil channel (32), wherein the first oil channel (31) is communicated with the second oil channel (32), the first oil channel (31) is communicated with the outside, and the second oil channel (32) is communicated with the mounting position of the bearing.

3. Decelerator (100) according to claim 2, characterized in that the second oil channel (32) extends in the axial direction of the driveshaft assembly (20).

4. Decelerator (100) according to claim 2, characterized in that the direction of extension of the first oil channel (31) and the direction of extension of the second oil channel (32) are perpendicular to each other.

5. Decelerator (100) according to claim 2, characterized in that the second oil channel (32) is arranged in a central position of the bearing.

6. Decelerator (100) according to claim 1, characterized in that the drive shaft assembly (20) is plural, and the breather plug oil passage (30) communicates with a mounting position of a bearing of the drive shaft assembly (20) which is positioned highest in the vertical direction.

7. Decelerator (100) according to claim 1, characterized in that the decelerator housing (10) is provided with an oil drainage groove (11), the oil drainage groove (11) corresponding to the mounting position of the bearing.

8. The reducer (100) of claim 1, further comprising: a breather plug (40), the breather plug (40) being disposed at an end of the breather plug oil passage (30).

9. Retarder (100) according to claim 8, characterised in that the breather plug (40) is arranged on top of the retarder housing (10).

10. A vehicle, characterized in that it comprises a retarder (100) according to any one of claims 1-9.