CN109990072B

CN109990072B - Wheel reduction and vehicle with same

Info

Publication number: CN109990072B
Application number: CN201711480926.5A
Authority: CN
Inventors: 张再利; 刁秀永; 徐莎
Original assignee: CRRC Qishuyan Institute Co Ltd
Current assignee: CRRC Qishuyan Institute Co Ltd
Priority date: 2017-12-29
Filing date: 2017-12-29
Publication date: 2024-05-03
Anticipated expiration: 2037-12-29
Also published as: CN109990072A

Abstract

The invention provides a wheel-side speed reducer and a vehicle with the same, wherein the wheel-side speed reducer comprises: the shell is internally provided with an installation cavity, the shell is provided with a ventilation channel, a first end of the ventilation channel is arranged on the inner wall of the shell and is communicated with the installation cavity, a second end of the ventilation channel is communicated with the outside, and the first end of the ventilation channel is positioned at the top of the shell or is arranged on the side wall of the shell and is close to the top of the shell; the gear transmission mechanism is arranged in the mounting cavity; a breather disposed at a second end of the breather passage; the bulge is arranged at the first end of the ventilation channel and communicated with the ventilation channel, and the bulge protrudes out of the inner wall of the shell. By the technical scheme provided by the invention, the technical problem that lubricating oil in the gear box in the prior art is easy to leak out of the breather is solved.

Description

Wheel reduction and vehicle with same

Technical Field

The invention relates to the technical field of wheel-side reducers, in particular to a wheel-side reducer and a vehicle with the same.

Background

Currently, a hub reduction gear is installed in a vehicle tire to achieve the purposes of reducing speed and increasing torque and driving the vehicle to move forward. In the long-term running process of the vehicle, the pressure in the vehicle tire is high due to heating of the speed reducer, in order to reduce the pressure difference between the inside and the outside, the wheel-side speed reducer is provided with a ventilation channel and a ventilator, and high-pressure gas passes through the ventilation channel and is discharged into the external environment from the ventilator. In the prior art, during long-term operation of the vehicle, part of the lubricating oil in the gear box also passes through the ventilation channel and is discharged from the ventilator to the external environment, resulting in insufficient lubricating oil in the gear box.

Disclosure of Invention

The invention provides a hub reduction gear and a vehicle with the same, and aims to solve the technical problem that lubricating oil in a gear box in the prior art is easy to leak from a breather.

According to an aspect of the present invention, there is provided a hub reduction gear comprising: the shell is internally provided with an installation cavity, the shell is provided with a ventilation channel, a first end of the ventilation channel is arranged on the inner wall of the shell and is communicated with the installation cavity, a second end of the ventilation channel is communicated with the outside, and the first end of the ventilation channel is positioned at the top of the shell or is arranged on the side wall of the shell and is close to the top of the shell; the gear transmission mechanism is arranged in the mounting cavity; the breather is arranged at the second end of the breather passage; the bulge is arranged at the first end of the ventilation channel and communicated with the ventilation channel, and the bulge protrudes out of the inner wall of the shell.

Further, the wheel-side speed reducer further includes: and the vent pipe is arranged in the vent channel, and one end of the vent pipe extends out from the first end of the vent channel to form a protruding part.

Further, the ventilation channel includes horizontal segment and vertical section that communicate each other, and the first end of horizontal segment sets up on the inner wall of casing and communicates with the installation cavity in order to form the first end of ventilation channel, and the breather pipe setting is in the horizontal segment, and the one end of vertical section communicates with the external world in order to form the second end of ventilation channel, and the ventilator setting is on vertical section.

Further, one end of the vent pipe positioned in the horizontal section is a closed end, an opening is formed in the pipe wall of the vent pipe, and the opening is communicated with the vertical section.

Further, the second end of the horizontal section is arranged on the outer side wall of the shell, the vent pipe is arranged in the horizontal section through the second end of the horizontal section, and the closed end of the vent pipe is positioned on one side of the vertical section, which is close to the second end of the horizontal section.

Further, a seal is provided on the closed end of the vent tube.

Further, the closed end of the vent pipe is fixedly connected with the horizontal section through threads or welded.

Further, the length of the projection is 8 to 12mm.

Further, the wheel-side speed reducer further includes: the rotating shaft is rotatably arranged in the mounting cavity, and the gear transmission mechanism is arranged on the rotating shaft; the bearing is arranged in the mounting cavity, the rotating shaft is arranged on the bearing, and the ventilation channel is arranged on one side, far away from the gear transmission mechanism, of the bearing.

According to another aspect of the present invention there is provided a vehicle comprising a wheel-side reducer, the wheel-side reducer being provided as described above.

By applying the technical scheme of the invention, the wheel-side speed reducer comprises: the device comprises a shell, a gear transmission mechanism, a breather and a protruding part. Wherein, the inside installation cavity that has of casing is provided with the passageway of ventilating on the casing, and the first end setting of passageway of ventilating is on the inner wall of casing and with installation cavity intercommunication, the second end and the external intercommunication of passageway of ventilating, the first end of passageway of ventilating is located the top of casing, or sets up on the casing lateral wall and is close to the top setting of casing. The gear transmission mechanism is arranged in the mounting cavity. The breather is disposed at the second end of the breather passage. The bulge sets up in the first end of ventilation passageway to with ventilation passageway intercommunication, the inner wall setting of bulge protrusion casing. By adopting the wheel-side speed reducer provided by the invention, in long-term running of a vehicle, the wheel-side speed reducer generates heat so that the internal pressure is high, and high-pressure gas passes through the ventilation channel and is discharged from the ventilator. Meanwhile, as the protruding part is arranged at the first end of the ventilation channel, the protruding part can block the lubricating oil in the gear box from entering the ventilation channel, so that the discharge of the lubricating oil in the gear box from the ventilator is reduced, and the technical problem that the lubricating oil in the gear box in the prior art is easy to leak from the ventilator is solved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:

fig. 1 shows a schematic structural diagram of a hub reduction gear provided by the invention;

FIG. 2 shows a schematic structural view of a vent channel provided by the present invention;

fig. 3 shows a schematic structural diagram of the vent pipe provided by the invention.

Wherein the above figures include the following reference numerals:

10. a housing; 11. a vent passage; 20. a gear transmission mechanism; 30. an aerator; 40. a vent pipe; 50. and (3) a bearing.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1, an embodiment of the present invention provides a hub reduction gear, including: the housing 10, the gear train 20, the breather 30 and the projection. Wherein, the housing 10 has a mounting cavity therein, and a ventilation passage 11 is provided in the housing 10 in order to facilitate the discharge of high-pressure gas from the housing 10. As shown in fig. 2, a first end of the ventilation channel 11 is provided on the inner wall of the housing 10 and communicates with the installation cavity, and a second end of the ventilation channel communicates with the outside. In particular, the first end of the vent passage 11 may be provided at the top of the housing 10, or the first end may be provided on a side wall of the housing 10 near the top of the housing 10. The first end of the vent passage 11 is disposed at the top of the housing 10 in this embodiment, with such a configuration that high pressure gas in the installation cavity can smoothly pass through the first end of the inlet vent passage 11 and smoothly reach the second end at the top. The gear transmission mechanism is arranged in the mounting cavity. In order to facilitate the evacuation of gas from the second end of the ventilation channel 11, a ventilator is provided at the second end of the ventilation channel. Meanwhile, in order to prevent the lubricant in the gear case from entering the first end of the ventilation channel 11, the protrusion is provided at the first end of the ventilation channel and communicates with the ventilation channel, and the protrusion protrudes from the inner wall of the housing 10 to block the lubricant from entering the ventilation channel 11.

With the wheel-side reducer provided in this embodiment, during long-term operation of the vehicle, the wheel-side reducer heats up to make the internal pressure of the gear box greater, and high-pressure gas enters the ventilation channel 11 from the installation cavity and is discharged from the ventilator 30. Meanwhile, as the first end of the ventilation channel 11 is provided with the protruding part, the protruding part can prevent the lubricating oil in the gear box from entering the first end of the ventilation channel 11 along the inner wall of the shell 10, so that the discharge of the lubricating oil in the gear box from the breather 30 can be reduced, the technical problem that the lubricating oil in the gear box in the prior art is easy to leak from the breather 30 is solved, and the loss of the lubricating oil in the gear box is reduced.

Specifically, the protruding portion may be integrally formed with the housing 10, or the protruding portion may be welded to the inner wall of the housing 10. In this embodiment, the wheel-side reducer further includes a breather tube 40. As shown in fig. 3, the vent tube 40 is disposed in the vent passage 11, and one end of the vent tube 40 protrudes from the first end of the vent passage 11 to form a protrusion. With such arrangement, the structure of the protruding portion is simple, and when the lubricating oil in the gear box flows along with the inner wall of the shell 10, the protruding portion effectively blocks the lubricating oil from entering the first end of the ventilation channel 11, so that the lubricating oil can be prevented from being discharged from the ventilator 30, and the effect of reducing the lubricating oil loss is achieved.

Specifically, the ventilation passage 11 includes a horizontal section and a vertical section that communicate with each other, a first end of the horizontal section is provided on an inner wall of the housing 10 and communicates with the installation cavity to form a first end of the ventilation passage 11, the ventilation pipe 40 is provided in the horizontal section, one end of the vertical section communicates with the outside to form a second end of the ventilation passage 11, and the ventilator 30 is provided on the vertical section. When the vehicle is running for a long time, the internal pressure is made larger as the wheel-side decelerator heats up. At this point, a portion of the high pressure gas will enter the first end of the vent passageway 11, and then the high pressure gas entering the vent passageway 11 will pass through the horizontal and vertical sections in sequence and exit the second end of the vent passageway 11. By arranging the ventilation channel 11 as a horizontal section and a vertical section, a certain blocking effect can be achieved, and outflow of internal lubricating oil can be reduced.

Specifically, the end of the breather pipe located in the horizontal section is a closed end, so that a very small amount of lubricating oil entering the breather passage 11 can be prevented from flowing out of the horizontal section in the breather passage 11. Meanwhile, in order to facilitate the smooth passage of the high-pressure gas into the ventilation passage 11 from the horizontal section into the vertical section, the ventilation pipe 40 is communicated with the vertical section of the ventilation passage 11. Specifically, an opening is provided in the wall of the vent tube 40 and communicates with the vertical section. In the present embodiment, the opening of the vent pipe 40 is provided at the vertical section facing the vent passage 11, so that the high-pressure gas can be smoothly introduced into the vertical section from the horizontal section in the vent passage 11.

In order to facilitate placement of the vent pipe 40 in the horizontal section, in this embodiment, the second end of the horizontal section is disposed on the outer side wall of the housing 10, the vent pipe 40 is disposed in the horizontal section through the second end of the horizontal section, and the closed end of the vent pipe 40 is located on one side of the vertical section close to the second end of the horizontal section, so as to ensure that the vertical section is communicated with the horizontal section. With this arrangement, an installer needs to thread one end of the vent pipe 40 from the second end of the horizontal section and finally extend one end of the vent pipe 40 from the first end of the vent passage 11 when installing the vent pipe 40, thus completing the installation of the vent pipe 40. To facilitate insertion of the breather pipe 40 into the breather passage 11 and to reduce the gap between the breather pipe 40 and the breather passage 11, the outside diameter of the breather pipe 40 in this embodiment should be slightly smaller than the inside diameter of the breather passage 11.

To improve the sealing performance of the vent tube 40, a seal is provided on the closed end of the vent tube. When the high-pressure gas in the ventilation channel 11 is introduced, the high-pressure gas will not flow out of the ventilation pipe 40, and meanwhile, by adopting the arrangement, the flow of the internal lubricating oil out of the ventilation pipe 40 is reduced, and the loss of the lubricating oil is reduced.

Specifically, the closed end of the vent tube 40 is secured or welded to the horizontal segment by a threaded connection. In this embodiment, the closed end of the vent tube 40 is threaded with the horizontal segment. Meanwhile, in order to keep the opening of the vent pipe 40 in communication with the vertical section, a positioning mark is also provided on the vent pipe 40. When the vent pipe 40 in this embodiment is installed, the vent pipe 40 is inserted into the second end of the horizontal segment, then the closed end of the vent pipe 40 is screwed into the thread of the horizontal segment, and after the vent pipe 40 is screwed into the position corresponding to the positioning mark, the assembly of the vent pipe 40 is completed.

In the present embodiment, the length of the protruding portion is set to 8 to 12mm. Therefore, the protrusion part can not only prevent the lubricating oil in the interior from flowing out, but also avoid the interference of the protrusion part on other parts in the interior.

Specifically, the wheel-side speed reducer further includes: a spindle and a bearing 50. Wherein the rotating shaft is rotatably arranged in the mounting cavity, and the gear transmission mechanism 20 is arranged on the rotating shaft. The bearing 50 is arranged in the mounting cavity, the rotating shaft is arranged on the bearing, and the ventilation channel 11 is arranged on one side of the bearing 50 away from the gear transmission mechanism 20. With this arrangement, the high-pressure gas inside will be more smoothly introduced into the ventilation passage 11.

With the wheel-side reducer provided in this embodiment, when the pressure inside the wheel-side reducer is high, high-pressure gas will enter the ventilation channel 11 through the first end of the ventilation channel 11, and finally the high-pressure gas will be discharged from the ventilator 30. Meanwhile, due to the blocking of the protruding part, the internal lubricating oil is difficult to enter the ventilation channel 11, so that the discharge of the lubricating oil from the ventilator 30 is reduced, and the loss of the internal lubricating oil is reduced.

In yet another embodiment of the present invention, a vehicle is provided, which includes a wheel-side reducer, wherein the wheel-side reducer is the wheel-side reducer provided in the above embodiment.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but should be considered part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present invention, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of protection of the present invention; the orientation word "inner and outer" refers to inner and outer relative to the contour of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "upper surface on … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial location relative to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the exemplary term "above … …" may include both orientations "above … …" and "below … …". The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, 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 wheel-side reducer, characterized in that it comprises:

the shell (10) is internally provided with a mounting cavity, the shell (10) is provided with a ventilation channel (11), a first end of the ventilation channel (11) is arranged on the inner wall of the shell (10) and is communicated with the mounting cavity, a second end of the ventilation channel (11) is communicated with the outside, and the first end of the ventilation channel (11) is positioned at the top of the shell (10) or is arranged on the side wall of the shell (10) and is close to the top of the shell (10);

a gear transmission mechanism (20) arranged in the mounting cavity;

-a breather (30), said breather (30) being arranged at a second end of said breather passage (11);

a protruding part which is arranged at the first end of the ventilation channel (11) and is communicated with the ventilation channel (11), wherein the protruding part protrudes out of the inner wall of the shell (10);

the hub reduction gear further includes:

a vent pipe (40) disposed within the vent passage (11), and one end of the vent pipe (40) protruding from a first end of the vent passage (11) to form the protrusion;

The ventilation channel (11) comprises a horizontal section and a vertical section which are communicated with each other, a first end of the horizontal section is arranged on the inner wall of the shell (10) and communicated with the installation cavity to form a first end of the ventilation channel (11), the ventilation pipe (40) is arranged in the horizontal section, one end of the vertical section is communicated with the outside to form a second end of the ventilation channel (11), and the ventilator (30) is arranged on the vertical section.

2. The hub reduction gear according to claim 1, characterized in that the end of the vent pipe (40) located in the horizontal section is a closed end, and an opening is provided in the pipe wall of the vent pipe (40), which opening communicates with the vertical section.

3. Wheel-side reducer according to claim 2, characterized in that the second end of the horizontal section is arranged on the outer side wall of the housing (10), that the ventilation pipe (40) is arranged in the horizontal section through the second end of the horizontal section, and that the closed end of the ventilation pipe (40) is located on the side of the vertical section close to the second end of the horizontal section.

4. A hub reduction gear according to claim 3, wherein a seal is provided on the closed end of the vent tube (40).

5. A wheel-side reducer according to claim 3, characterized in that the closed end of the ventilation tube (40) is screwed or welded to the horizontal section.

6. The hub reduction gear according to claim 1, wherein the length of the projection is 8 to 12mm.

7. The wheel-side reducer of claim 1, further comprising:

The rotating shaft is rotatably arranged in the mounting cavity, and the gear transmission mechanism (20) is arranged on the rotating shaft;

The bearing (50) is arranged in the mounting cavity, the rotating shaft is arranged on the bearing (50), and the ventilation channel (11) is arranged on one side, far away from the gear transmission mechanism (20), of the bearing (50).

8. A vehicle comprising a wheel-side reducer, characterized in that the wheel-side reducer is the wheel-side reducer according to any one of claims 1 to 7.