WO2020253178A1

WO2020253178A1 - Crankcase of all-terrain vehicle, and all-terrain vehicle

Info

Publication number: WO2020253178A1
Application number: PCT/CN2019/126354
Authority: WO
Inventors: 戚公望
Original assignee: 北京致行慕远科技有限公司
Priority date: 2019-06-21
Filing date: 2019-12-18
Publication date: 2020-12-24
Also published as: CN110296020A

Abstract

A crankcase (100) of an all-terrain vehicle, comprising: a case body (10) provided with a balance shaft hole (11); a balance shaft (20) arranged in the balance shaft hole (11) and having one end extending out of the case body (10), the extended end of the balance shaft (20) being provided with an oil outlet hole (21); and an air breather (30) sleeved and fixed onto the extended end of the balance shaft (20) and having a breathing cavity formed thereinside, the breathing cavity corresponding to and being communicated with the oil outlet hole (21), and an oil slinger hole (311) communicated with the breathing cavity being formed on the circumferential wall of the air breather (30). Further provided is an all-terrain vehicle having the crankcase.

Description

Crankcase of all-terrain vehicle and all-terrain vehicle

Cross references to related applications

This disclosure is based on a Chinese patent application filed with an application number of 201910540888.0 and an application date of June 21, 2019, and claims the priority of the Chinese patent application. The entire content of the Chinese patent application is incorporated herein by reference.

Technical field

The present disclosure relates to the field of vehicle technology, and in particular to a crankcase for an all-terrain vehicle and an all-terrain vehicle with the crankcase removed.

Background technique

In the related art, when the engine is working normally, due to the rotation of the crank connecting rod piston mechanism of the vehicle and the action of the reciprocating inertia force, the pulsating pressure will be generated in the crankcase of the vehicle, which will cause the pressure difference in the crankcase to cause the crankcase The oil inside is sprayed to the outside of the box.

To avoid this phenomenon, a labyrinth is usually set inside the crankcase and the breathing tube is connected to the atmosphere. However, in actual use, such technical means cannot solve the above-mentioned problems. For example, when the engine is rotating at high revolution and working at full load, there is still a phenomenon that the oil is injected to the outside of the body.

Summary of the invention

The present disclosure aims to solve at least one of the technical problems existing in the prior art. For this reason, the present disclosure needs to provide a crankcase for an all-terrain vehicle. The crankcase of the all-terrain vehicle can realize oil vapor separation and reduce oil consumption.

The present disclosure needs to further provide an all-terrain vehicle.

The crankcase of the all-terrain vehicle according to the present disclosure may include: a box body provided with a balance shaft hole; a balance shaft, the balance shaft is provided in the balance shaft hole and one end extends out of the box body, The protruding end of the balance shaft is provided with an oil outlet; the respirator is sleeved and fixed on the protruding end of the balance shaft and a breathing cavity is formed inside, the breathing cavity and the oil outlet Correspondingly and in communication, the peripheral wall of the respirator is provided with an oil sling hole communicating with the breathing cavity.

Therefore, by adding a respirator, the problem of the oil in the crankcase spraying to the outside of the case can be solved, and the oil sprayed from the oil outlet hole of the balance shaft can be thrown onto the inner wall of the crankcase to make the oil fall back to the case. Bottom, so as to realize the circulation of oil, reduce oil consumption, and the structure of the respirator is simple, which is convenient for assembly and maintenance.

In some examples of the present disclosure, the respirator includes: a respirator sleeve, the respirator sleeve is fixed on the protruding end of the balance shaft and is axially open; a respirator cover, the respirator cover Is provided at the protruding end of the balance shaft, the respirator cover is provided on the open end of the respirator sleeve to form the breathing cavity, and the oil outlet is located between the respirator sleeve and the respirator Between the covers.

In some examples of the present disclosure, it further includes: a fixing pin, which is fixed between the inner shaft hole of the respirator sleeve and the outer circumference of the protruding end of the balance shaft.

In some examples of the present disclosure, the protruding end of the balance shaft is provided with an annular groove, and the annular groove is located on the axial outer side of the oil outlet hole.

In some examples of the present disclosure, the crankcase further includes a retaining ring, which is fitted at the annular groove and stops the respirator cover.

In some examples of the present disclosure, the crankcase further includes an oil seal, and the oil seal is sleeved on the protruding end of the balance shaft and located between the respirator cover and the retaining ring.

In some examples of the present disclosure, the oil sling hole is formed on the outer peripheral wall of the respirator cover and extends in a radial direction.

In some examples of the present disclosure, the inner shaft hole of the respirator sleeve is in clearance fit with the protruding end of the balance shaft.

In some examples of the present disclosure, both the respirator cover and the respirator cover are made of composite materials.

In some examples of the present disclosure, the respirator cover and the respirator cover are both nylon and glass fiber composite materials.

The all-terrain vehicle according to the present disclosure includes: a cylinder; the crankcase of the above-mentioned all-terrain vehicle, the cylinder is assembled to the crankcase.

The crankcase of the all-terrain vehicle according to the present disclosure includes: a box body provided with a balance shaft hole; a balance shaft, the balance shaft is provided in the balance shaft hole and one end extends out of the box body Balance shaft hole, the extension end of the balance shaft is provided with an oil outlet; a respirator, the respirator is sleeved and fixed on the extension end of the balance shaft and a breathing cavity is formed inside, wherein the breathing cavity and The oil outlet holes correspond and communicate with each other, and the peripheral wall of the respirator is provided with an oil sling hole communicating with the breathing cavity.

In some examples of the present disclosure, the respirator includes: a respirator sleeve, the respirator sleeve is sleeved and fixed on the protruding end of the balance shaft and is axially open; and a respirator cover, the respirator cover Is sleeved on the protruding end of the balance shaft, wherein the respirator cover is provided on the open end of the respirator sleeve to form the breathing cavity, and the oil outlet is located between the respirator sleeve and the Between the respirator cover.

In some examples of the present disclosure, an inner shaft hole is formed at the open end of the inner side of the respirator sleeve; the crankcase further includes a fixing pin that is fixed to the inner shaft hole and the balance shaft Between the outer periphery of the projecting end.

In some examples of the present disclosure, the crankcase further includes an oil seal sleeved on the protruding end of the balance shaft and located between the respirator cover and the retaining ring.

In some examples of the present disclosure, the oil sling hole is formed on the outer peripheral wall of the respirator cover and radially penetrates the outer peripheral wall of the respirator cover.

In some examples of the present disclosure, a continuously variable transmission is provided on one side of the crankcase, and the protruding end is the end of the balance shaft close to the continuously variable transmission.

The additional aspects and advantages of the present disclosure will be partially given in the following description, and some will become obvious from the following description, or be understood through the practice of the present disclosure.

Description of the drawings

The above and/or additional aspects and advantages of the present disclosure will become obvious and easy to understand from the description of the embodiments in conjunction with the following drawings, in which:

Fig. 1 is an exploded view of a crankcase of an all-terrain vehicle according to an embodiment of the present disclosure; and

Figure 2 is a schematic diagram of the respirator and the balance shaft.

Reference signs:

Crankcase 100;

Box 10; balance shaft hole 11; balance shaft 20; oil outlet 21; annular groove 22;

Respirator 30; Respirator cover 31; Oil sling hole 311; Respirator cover 32;

Fixed pin 40; oil seal 50; retaining ring 60;

Case cover 70; transmission case 80.

Detailed ways

The embodiments of the present disclosure are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary and not for the purpose of limiting the protection scope of the present disclosure.

The crankcase 100 of an all-terrain vehicle according to an embodiment of the present disclosure will be described below with reference to FIGS. 1 to 2. The crankcase 100 of the all-terrain vehicle is additionally equipped with a respirator 30, and the respirator 30 can realize oil-vapor separation and reduce oil consumption.

As shown in FIG. 1, the crankcase 100 of the all-terrain vehicle according to the embodiment of the present disclosure may include: a box body 10, a balance shaft 20 and a respirator 30.

As shown in Figure 1, a crankshaft is installed inside the box body 10 of the crankcase 100. The box body 10 in the figure is the right box body 10 of the crankcase 100. The left side is also provided with a left box body, a left box body and a right box body. The two parts of the box body are arranged oppositely, and the crankshaft is accommodated in the inner space of the left box body and the right box body.

The box body 10 is provided with a balance shaft hole 11, the balance shaft 20 is arranged in the balance shaft hole 11, and one end of the balance shaft 20 extends out of the box body 10, for example, the extension end of the balance shaft 20 extends out of the balance shaft hole 11, An oil outlet hole 21 is provided at the protruding end of the shaft 20, and the oil outlet hole 21 can extend in a radial direction. An oil passage is provided in the balance shaft 20, and oil can flow in the oil passage. When the engine is working, the oil flows into the oil outlet 21 of the balance shaft 20 under the action of the pressure difference. As the balance shaft 20 rotates to generate centrifugal force, the oil is thrown out through the oil outlet 21.

As shown in Figure 2, the respirator 30 is sleeved and fixed on the extension end of the balance shaft 20, and a breathing cavity is formed inside the respirator 30. The breathing cavity corresponds to and communicates with the oil outlet 21. The peripheral wall of the respirator 30 is provided There is an oil sling hole 311 communicating with the breathing cavity. The oil sling hole 311 may be provided at least one, for example, three, four, etc. When the respirator 30 is sleeved on the extended end of the balance shaft 20, the oil outlet 21 on the balance shaft 20 can be placed inside the breathing chamber, so that the oil thrown out through the oil outlet 21 can smoothly enter the breathing chamber. In this way, the oil can be smoothly thrown out from the oil sling hole 311 on the peripheral wall of the respirator 30 to the inner wall of the crankcase 100, and fall back to the bottom of the box body 10, thereby realizing the circulation of the oil.

Thus, according to an embodiment of the present disclosure, by adding a respirator 30, the problem that the oil in the crankcase 100 is sprayed to the outside of the case 10 can be solved. In addition, the oil sprayed from the oil outlet 21 of the balance shaft 20 can be thrown onto the inner wall of the crankcase 100, so that the oil will fall back to the bottom of the box body 10, thereby realizing the circulating use of the oil, reducing the oil consumption, and respirator The structure of 30 is simple, easy to assemble and maintain.

As shown in FIGS. 1-2, according to an embodiment of the present disclosure, the respirator 30 may include: a respirator cover 31 and a respirator cover 32. The respirator cover 31 is sleeved and fixed on the protruding end of the balance shaft 20 and breathes The sleeve 31 is axially opened toward the outside and has an open end. The respirator cover 32 is sleeved on the protruding end of the balance shaft 20, and the respirator cover 32 is sleeved on the open end of the respirator sleeve 31 to form a breathing cavity. The oil outlet 21 can be located between the respirator cover 31 and the respirator cover 32, and the oil thrown from the oil outlet 21 can be contained in the breathing cavity and be thrown out from the oil sling hole 311 on the outer wall of the respirator cover 31 to the tank.体10 Bottom.

According to an embodiment of the present disclosure, the respirator sleeve 31 may be a ring-shaped structure with open ends, the opening area of the outer open end of the respirator sleeve 31 is larger than the opening area of the inner open end, and the outer open end of the respirator sleeve 31 is provided with The inner stop 312 and the respirator cover 32 have a circular sheet-like structure, and the respirator cover 32 fits the surface of the inner stop 312 of the respirator sleeve 31 to enhance the sealing of the respirator 30 and avoid the breathing cavity The oil inside has leaked. According to an embodiment of the present disclosure, the respirator 30 has a simple structure, and is easy to install and maintain.

According to an embodiment of the present disclosure, as shown in FIG. 2, the protruding end of the balance shaft 20 is provided with an annular groove 22, the annular groove 22 is located on the axial outer side of the oil outlet hole 21, and the crankcase 100 further includes a retaining ring 60 , The retaining ring 60 is fitted at the annular groove 22 and blocks the respirator cover 32. The annular groove 22 is circumferentially arranged at the protruding end of the balance shaft 20, and the annular groove 22 is arranged to fix the position of the retaining ring 60, so that the retaining ring 60 can stop the respirator cover 32, thereby fixing the respirator cover The position of 32 makes the respirator cover 32 and the respirator cover 31 form a closed breathing cavity.

Further, as shown in FIG. 1, the crankcase 100 further includes an oil seal 50, which is sleeved on the protruding end of the balance shaft 20 and is located between the respirator cover 32 and the retaining ring 60. The oil seal 50 provided between 60 can prevent the oil from leaking from the respirator cover 32 and enhance the sealing performance of the connection between the respirator cover 32 and the respirator cover 31.

According to an embodiment of the present disclosure, as shown in FIG. 2, the oil sling hole 311 may be formed on the outer peripheral wall of the respirator cover 31 and penetrate the outer peripheral wall of the respirator cover 31 radially. By arranging the oil sling hole 311 at this position, it can be ensured that the oil is smoothly sled to the inner wall of the crankcase 100 and falls back to the bottom of the box body 10, thereby realizing the circulation of the oil and reducing the consumption of the oil.

According to an embodiment of the present disclosure, the respirator cover 31 is formed with an inner shaft hole 313. For example, the respirator cover 31 may be a ring structure with open ends, and an inner shaft hole 313 is formed at the inner open end of the respirator cover 31, The inner shaft hole 313 is matched with the protruding end of the balance shaft 20, that is, the protruding end of the balance shaft 20 passes through the inner shaft hole 313. The inner shaft hole 313 of the respirator sleeve 31 is in clearance fit with the protruding end of the balance shaft 20. According to an embodiment of the present disclosure, the crankcase 100 may further include a fixing pin 40. The fixing pin 40 may be fixed between the inner shaft hole 313 of the respirator cover 31 and the outer circumference of the protruding end of the balance shaft 20. By setting the fixing pin 40 at this position, the position of the respirator 30 can be fixed, so as to avoid the deviation, and the respirator 30 and the balance shaft 20 can rotate synchronously.

Specifically, the respirator cover 31 and the respirator cover 32 are both composite materials. The use of composite materials can not only reduce the weight of the respirator cover 31 and the respirator cover 32, but also ensure the strength of the respirator cover 31 and the respirator cover 32. .

Further, the respirator cover 31 and the respirator cover 32 are both nylon and glass fiber composite materials. Of course, other composite materials can also be used. The use of nylon and glass fiber composite materials can not only reduce the respirator cover 31 and the respirator cover 32 The weight can also ensure the strength of the respirator cover 31 and the respirator cover 32.

The all-terrain vehicle according to an embodiment of the present disclosure may include a cylinder and the crankcase 100 of the all-terrain vehicle of the above embodiment, and the cylinder may be assembled to the crankcase 100, for example, diagonally above the crankcase 100.

As shown in Figure 1, the left side of the box body 10 is also provided with a box cover 70, the box cover 70 is provided on the left side of the box body 10, and the left side of the box body 10 and the box cover 70 are also provided with a continuously variable transmission. The step transmission includes a transmission case 80, and the transmission case 80 may be installed on the case 10. The protruding end of the balance shaft 20 is the end of the balance shaft 20 close to the continuously variable transmission. This arrangement can facilitate the exhaust of the respirator 30.

In the description of the present disclosure, “first feature” and “second feature” may include one or more of these features. In the description of the present disclosure, "plurality" means two or more. In the description of the present disclosure, "above" or "below" the first feature may include the first and second features in direct contact, or may include the first and second features not in direct contact but through them Another feature contact between. In the description of the present disclosure, the "above", "above" and "above" of the first feature on the second feature include the first feature directly above and diagonally above the second feature, or it simply means that the level of the first feature is higher than The second feature.

In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "exemplary embodiments", "examples", "specific examples", or "some examples" etc. means to incorporate the implementation The specific features, structures, materials or characteristics described by the examples or examples are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above-mentioned terms does not necessarily refer to the same embodiment or example.

Although the embodiments of the present disclosure have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principles and principles of the present disclosure. The scope of the present disclosure is defined by the claims and their equivalents.

Claims

A crankcase of an all-terrain vehicle, characterized in that it comprises:

A box body provided with a balance shaft hole;

A balance shaft, the balance shaft is disposed in the balance shaft hole and one end extends out of the box body, and the extension end of the balance shaft is provided with an oil outlet;

A respirator, the respirator is sleeved and fixed on the protruding end of the balance shaft and a breathing cavity is formed inside, wherein

The breathing cavity corresponds to and communicates with the oil outlet hole, and the peripheral wall of the respirator is provided with an oil sling hole communicating with the breathing cavity.
The crankcase of the all-terrain vehicle according to claim 1, wherein the respirator comprises:

A respirator sleeve, the respirator sleeve is sleeved and fixed on the protruding end of the balance shaft and is axially open; and

The respirator cover is sleeved on the extension end of the balance shaft, wherein

The respirator cover is arranged at the open end of the respirator cover to form the breathing cavity, and the oil outlet is located between the respirator cover and the respirator cover.
The crankcase of the all-terrain vehicle according to claim 2, characterized in that it further comprises:

The fixing pin is fixed between the inner shaft hole of the respirator sleeve and the outer circumference of the protruding end of the balance shaft.
The crankcase of the all-terrain vehicle according to claim 2, wherein the protruding end of the balance shaft is provided with an annular groove, and the annular groove is located on the axial outside of the oil outlet hole.
The crankcase of an all-terrain vehicle according to claim 4, wherein the crankcase further comprises:

A retaining ring, which is fitted at the annular groove and blocks the respirator cover.
The crankcase of the all-terrain vehicle according to claim 4, further comprising:

The oil seal is sleeved on the protruding end of the balance shaft and located between the respirator cover and the retaining ring.
The crankcase of the all-terrain vehicle according to claim 2, wherein the oil sling hole is formed on the outer peripheral wall of the respirator cover and radially penetrates the outer peripheral wall of the respirator cover.
The crankcase of the all-terrain vehicle according to claim 3, wherein the inner shaft hole of the respirator sleeve is in clearance fit with the protruding end of the balance shaft.
The crankcase of the all-terrain vehicle according to claim 2, wherein the respirator cover and the respirator cover are made of composite materials.
The crankcase of an all-terrain vehicle according to claim 9, wherein the respirator cover and the respirator cover are both nylon and glass fiber composite materials.
An all-terrain vehicle, characterized in that it comprises:

Cylinder; and

The crankcase of an all-terrain vehicle according to any one of claims 1-10, wherein

The cylinder is assembled to the crankcase.
A crankcase of an all-terrain vehicle, characterized in that it comprises:

A box body provided with a balance shaft hole;

A balance shaft, the balance shaft is arranged in the balance shaft hole and one end extends out of the balance shaft hole of the box body, and the extension end of the balance shaft is provided with an oil outlet;

A respirator, the respirator is sleeved and fixed on the protruding end of the balance shaft and a breathing cavity is formed inside, wherein

The breathing cavity corresponds to and communicates with the oil outlet hole, and the peripheral wall of the respirator is provided with an oil sling hole communicating with the breathing cavity.
The crankcase of an all-terrain vehicle according to claim 12, wherein the respirator comprises:

A respirator sleeve, the respirator sleeve is fixed on the protruding end of the balance shaft and is axially open; and

The respirator cover is sleeved on the protruding end of the balance shaft, wherein

The respirator cover is arranged at the open end of the respirator cover to form the breathing cavity, and the oil outlet is located between the respirator cover and the respirator cover.
The crankcase of an all-terrain vehicle according to claim 13, wherein an inner shaft hole is formed at the inner open end of the respirator sleeve;

The crankcase further includes a fixing pin that is fixed between the inner shaft hole and the outer circumference of the protruding end of the balance shaft.
The crankcase of the all-terrain vehicle according to claim 13, wherein the protruding end of the balance shaft is provided with an annular groove, and the annular groove is located on the axial outer side of the oil outlet hole.
The crankcase of an all-terrain vehicle according to claim 15, wherein the crankcase further comprises:

A retaining ring which is fitted at the annular groove and blocks the respirator cover.
The crankcase of the all-terrain vehicle according to claim 15, characterized in that it further comprises:

An oil seal, which is sleeved on the protruding end of the balance shaft and located between the respirator cover and the retaining ring.
The crankcase of the all-terrain vehicle according to claim 13, wherein the oil sling hole is formed on the outer peripheral wall of the respirator cover and radially penetrates the outer peripheral wall of the respirator cover.
The crankcase of the all-terrain vehicle according to claim 12, wherein a continuously variable transmission is provided on one side of the crankcase, and the extended end is the end of the balance shaft close to the continuously variable transmission .