Half shaft sleeve, front axle assembly and vehicle

Abstract

The present application discloses a half shaft sleeve, a front axle assembly and a vehicle, including: a half shaft sleeve, including: a sleeve body and an oil duct pipe, both ends of the sleeve body are respectively connected to a reducer housing and a separator housing; the oil duct pipe is arranged on the circumferential side of the sleeve body, one end of the oil duct pipe is communicated with the inner cavity of the reducer housing, and the other end is communicated with the inner cavity of the separator housing to conduct the lubricating medium in the reducer housing to the separator housing. According to the half shaft sleeve of the embodiment of the present application, by arranging the oil duct pipe, the reducer housing and the separator housing can be conducted to realize the replenishment of the lubricating medium to the separator, and the working stability and service life of the separator can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular, to a half - shaft sleeve, a front axle assembly, and a vehicle. Background Art

[0002] Off - road vehicles and some special - type vehicles, based on the requirements of passability, can generally switch between two - wheel drive and four - wheel drive modes. On urban roads or flat paved roads, the two - wheel drive mode is adopted, while on complex road conditions (such as mountains and sand), in order to improve passability, it is necessary to switch to the four - wheel drive mode.

[0003] In the related art, the transfer case selectively transmits power to the front axle assembly, and the front axle assembly can control the selectively power connection between the drive shaft and the front axle half - shaft through a separator to achieve the switching between the two - wheel drive mode and the four - wheel drive mode. The reducer is connected to the separator through a half - shaft sleeve, and the lubricating medium in the reducer housing can flow into the separator to lubricate the transmission components inside the separator.

[0004] However, the reducer and the separator are on the same axis. When the vehicle is traveling on an inclined road or parked on an inclined road surface, when the vehicle switches from the two - wheel drive mode to the four - wheel drive mode, the lubricating medium may flow back to the reducer housing under the action of gravity, resulting in insufficient lubricating medium in the separator housing, lubrication deficiency, and even phenomena such as separator motor ablation and damage to the spline gears inside the separator, reducing the service life of the front axle assembly. Summary of the Invention

[0005] The present invention aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the present invention is to provide a front axle assembly with a long service life and high working stability.

[0006] The present application also provides a front axle assembly using the above - mentioned half - shaft sleeve.

[0007] The present application further provides a vehicle using the above - mentioned front axle assembly.

[0008] The half - shaft sleeve according to the first - aspect embodiment of the present application includes: a sleeve body and an oil - duct pipe. The two ends of the sleeve body are respectively connected to the reducer housing and the separator housing; the oil - duct pipe is arranged on the circumferential side of the sleeve body, one end of the oil - duct pipe is communicated with the inner cavity of the reducer housing, and the other end is communicated with the inner cavity of the separator housing to conduct the lubricating medium in the reducer housing to the separator housing.

[0009] According to the half - shaft sleeve of the embodiment of the present application, by arranging the oil - duct pipe, the reducer housing and the separator housing can be conducted, so as to realize the replenishment of the lubricating medium to the separator, and the working stability and service life of the separator can be improved.

[0010] According to some embodiments of the present application, in the Z direction of the whole vehicle, the oil duct pipe is arranged below the sleeve body.

[0011] Furthermore, an oil storage cavity is arranged on the sleeve body.

[0012] In some embodiments, the oil storage cavity is located on the plane where the end of the oil duct pipe connected to the separator housing is located, and in the Z direction of the whole vehicle, the oil storage cavity is located below the end of the oil duct pipe.

[0013] Furthermore, the oil storage cavity is inclined, and the cross-sectional area of the oil storage cavity gradually decreases in the direction away from the separator housing.

[0014] In some embodiments, the oil duct pipe includes: a first pipe, an intermediate pipe, and a second pipe; the first pipe communicates with the inner cavity of the reducer housing; the first pipe communicates with the second pipe through the intermediate pipe; the second pipe communicates with the inner cavity of the separator housing.

[0015] Furthermore, the first pipe is inclined.

[0016] Furthermore, the inclination angle of the first through hole is 15° - 20°.

[0017] In some embodiments, the diameter of the second pipe gradually decreases in the direction close to the separator housing.

[0018] According to some embodiments of the present application, the sleeve body and the oil duct pipe are integrally formed.

[0019] Furthermore, the outer contour of the oil duct pipe is in a "U" shape.

[0020] The front axle assembly according to the second aspect embodiment of the present application includes: a reducer, a front axle half shaft, a separator, a drive shaft, and a half shaft sleeve. Both ends of the reducer are respectively power-connected to one of the drive shafts and the front axle half shaft. A separator is arranged between the other end of the front axle half shaft and the other drive shaft. The separator is used to control the selectively power connection between the drive shaft and the front axle half shaft.

[0021] The vehicle according to the third aspect embodiment of the present application includes: the front axle assembly described in the above embodiments.

[0022] The additional aspects and advantages of the present invention will be partially given in the following description, partially become obvious from the following description, or be understood through the practice of the present invention. Description of the Drawings

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, in which:

[0024] Figure 1 is a schematic diagram of a front axle assembly according to an embodiment of the present application;

[0025] Figure 2 is a schematic diagram of a half shaft sleeve of a front axle assembly according to an embodiment of the present application;

[0026] Figure 3 is a cross-sectional schematic diagram of a half shaft sleeve of a front axle assembly according to an embodiment of the present application at an angle;

[0027] Figure 4 is a left view schematic diagram of a half shaft sleeve of a front axle assembly according to an embodiment of the present application;

[0028] Figure 5 is a right view schematic diagram of a half shaft sleeve of a front axle assembly according to an embodiment of the present application

[0029] Figure 6 is a cross-sectional schematic diagram of a half shaft sleeve of a front axle assembly according to an embodiment of the present application at another angle.

[0030] Reference numerals:

[0031] front axle assembly 100,

[0032] reducer 10, separator 20, drive shaft 30,

[0033] half shaft sleeve 40, sleeve body 41, first flange 411, second flange 412, oil storage cavity 413, oil duct pipe 42, first pipe 421, intermediate pipe 422, second pipe 423. Detailed implementation manners

[0034] Embodiments of the present invention will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0035] Reference is made below to Figures 1 - 6 describe a front axle assembly 100, a drive system, and a vehicle according to an embodiment of the present invention.

[0036] As Figure 2 and Figure 3As shown, the half shaft sleeve 40 according to the embodiment of the first aspect of the present application includes: a sleeve body 41 and an oil duct pipe 42. The two ends of the sleeve body 41 are respectively connected to the reducer housing and the separator housing; the oil duct pipe 42 is arranged on the circumferential side of the sleeve body 41. One end of the oil duct pipe 42 is communicated with the inner cavity of the reducer housing, and the other end of the oil duct pipe 42 is communicated with the inner cavity of the separator housing of the separator 20, so as to conduct the lubricating medium in the reducer housing to the separator housing. Since the separator 20 and the reducer 10 are on the same axis, when the vehicle travels obliquely or parks on an inclined road surface, it will cause the lubricating medium in the separator housing to flow into the reducer housing, resulting in insufficient lubricating medium in the separator housing, aggravating the wear of the transmission gear train in the separator 20, and even causing the motor of the separator 20 to burn out.

[0037] Based on this, the present application further provides an oil duct pipe 40. Through the guiding action of the oil duct pipe 40, at least part of the lubricating medium in the reducer housing is guided to the separator housing, which can ensure that the transmission gear train in the separator housing can be lubricated to reduce the wear of the separator 20.

[0038] According to the half shaft sleeve 40 of the embodiment of the present application, by providing the oil duct pipe 42, the reducer housing and the separator housing can be communicated to realize the replenishment of the lubricating medium to the separator 20, which can improve the working stability and service life of the separator 20.

[0039] It should be noted that the oil duct pipe 42 arranged on the circumferential side of the sleeve body 41 can be located above, below, left, right, etc. of the sleeve body 41.

[0040] Of course, in some other embodiments, an oil duct can also be arranged in the shaft hole of the sleeve body 41 for accommodating the front axle half shaft to realize the communication between the separator housing and the reducer housing.

[0041] Further, referring to Figure 2 and Figure 3 As shown, in the Z direction of the whole vehicle, the oil duct pipe 42 is arranged below the sleeve body 41, and an oil storage cavity 413 is arranged on the sleeve body 41.

[0042] Specifically, one end of the oil duct pipe 42 communicates with the inner cavity of the reducer housing. The sleeve body 41 is provided with an oil storage cavity 413 below the other end. When the vehicle is driving on an inclined road surface or parking on an inclined road surface, since the oil storage cavity 413 is located below the oil duct pipe 42, the lubricating medium located below the oil duct pipe 42 in the inclined state can be intercepted at least partially under the interception action of the oil storage cavity 413. At the same time, a part of the lubricating medium can also be stored in the oil storage cavity 413 to ensure that there is still enough lubricating medium in the separator housing to meet the lubrication demand, so as to avoid the phenomenon of insufficient lubrication of the transmission gear train in the separator housing, thereby reducing the wear of the transmission gear train in the separator 20, stabilizing the driving torque of the separator 20, avoiding the ablation of the separator motor caused by excessive driving torque, extending the service life of the separator 20 and the front axle assembly 100, and improving the working stability of the front axle assembly 100.

[0043] According to the half shaft convex and concave through 40 of the embodiment of the present application, by arranging the oil storage cavity 413 below the oil duct pipe 42, the liquid level of the lubricating medium in the form of fluid can be intercepted after dropping below the oil duct pipe 42, and at least part of the lubricating medium can enter the oil storage cavity 413 for storage, so as to ensure that there is still enough lubricating medium in the separator housing to meet the lubrication demand, avoid the phenomenon of insufficient lubrication of the transmission gear train, improve the service life of the separator 20 and the front axle assembly 100, and improve the working stability of the front axle assembly 100.

[0044] As Figure 4 and Figure 5 As shown, according to some embodiments of the present application, the two ends of the sleeve body 41 are respectively provided with a first flange 411 for connecting with the reducer housing and a second flange 412 for connecting with the separator housing. The two ends of the oil duct pipe 42 respectively pass through the first flange 411 and the second flange 412.

[0045] That is to say, as Figure 3 shown, the oil duct pipe 42 includes: a first pipe 421, an intermediate pipe 422, and a second pipe 423; the first pipe 421 communicates with the inner cavity of the reducer housing; the first pipe 421 is communicated with the second pipe 423 through the intermediate pipe 422; the second pipe 423 communicates with the inner cavity of the separator housing. The first flange 411 can be fitted on the reducer housing, and the second flange 412 can be fitted on the separator housing to improve the connection stability between the half shaft sleeve 40, the reducer 10, and the separator 20. The first pipe 421 passing through the first flange 411, and the second pipe 423 and the intermediate pipe 422 passing through the second flange 412 can define a flow channel for the lubricating medium, so as to facilitate the circulation of the lubricating medium between the inner cavity of the reducer housing and the inner cavity of the separator housing.

[0046] Furthermore, when the liquid level of the lubricating medium in the reducer housing is higher than one end of the oil duct pipe 42 and the liquid level of the lubricating medium in the separator housing is lower than the other end of the oil duct pipe 42; or when the liquid level of the lubricating medium in the separator housing is higher than the other end of the oil duct pipe 42 and the liquid level of the lubricating medium in the reducer housing is lower than one end of the oil duct pipe 42, the lubricating medium can be distributed through the flow channel. When the vehicle is driving or parked on an incline, the lubricating medium above the other end of the oil duct pipe 42 can flow into the reducer housing, and the lubricating medium below the other end of the oil duct pipe 42 can be retained in the separator housing and lubricate the transmission gear train in the separator housing together with the lubricating medium stored in the oil storage cavity 413, so as to reduce the wear of the transmission gear train, extend the service life of the separator 20, and improve the working stability of the separator 20.

[0047] As Figure 3 shown, the opening profile of the oil storage cavity 413 in the radial direction of the sleeve body 41 is an oblong hole, and in the direction away from the separator housing, the oil storage cavity 413 extends obliquely upward and the opening area gradually decreases.

[0048] In other words, the opening of the oil storage cavity 413 is located on the plane where the end of the oil duct pipe 42 connected to the separator housing is located; in the Z direction of the whole vehicle, the oil storage cavity 413 is located below the end of the oil duct pipe 42, the oil storage cavity 413 is obliquely arranged, and the cross-sectional area of the oil storage cavity 413 gradually decreases in the direction away from the separator housing.

[0049] In this way, on the premise of realizing the storage of the lubricating medium through the oil storage cavity 413, the opening area of the oil storage cavity 413 is made more reasonable, the influence of opening the oil storage cavity 413 on the structural strength of the half shaft sleeve 40 is reduced, and the storage volume of the oil storage cavity 413 and the structural strength of the half shaft sleeve 40 are taken into account.

[0050] As Figure 3 shown, the oil duct pipe 42 includes: a first pipe 421, an intermediate pipe 422, and a second pipe 423; the first pipe 421 communicates with the inner cavity of the reducer housing; the first pipe 421 communicates with the second pipe 423 through the intermediate pipe 422; the second pipe 423 communicates with the inner cavity of the separator housing.

[0051] In some embodiments, the first pipe 421 is obliquely arranged. In this way, the oil guiding effect of the oil duct pipe 42 can be improved, and the lubricating medium in the reducer 10 can be guided to the separator housing more quickly.

[0052] Furthermore, the inclination angle of the first pipe 421 is 15° - 20°. In this way, while achieving the technical effect of rapid oil guiding, the structural influence of arranging the inclined first pipe 421 on the half shaft sleeve 40 and the reducer housing can be reduced, and the oil guiding effect and the structural strength of the half shaft sleeve 40 are taken into account.

[0053] It can be understood that, as Figure 3 shown, further reducing the diameter of the second pipe 423 in the direction close to the separator housing, so that the second pipe 423 is formed into a converging structure. On the one hand, when the vehicle is driving on an inclined road surface or parking on an inclined road surface, the speed of the lubricating medium flowing from the separator housing into the reducer housing can be reduced, and the time for the lubricating medium to flow back into the reducer housing can be extended, so as to maintain the lubricating effect in the separator 20; on the other hand, during the process of the lubricating medium flowing from the oil duct pipe 42 into the separator housing, the pressure of the lubricating medium is increased through the converging structure, so that the flow potential energy of the lubricating medium after flowing out of the second pipe 423 is greater, and it can be splashed onto the lubricated transmission gear train to improve the lubricating effect and achieve rapid lubrication.

[0054] It can be understood that the sleeve body 41 and the oil duct pipe 42 are integrally formed, which can reduce the processing cost of the half shaft sleeve 40 and improve the processing efficiency.

[0055] As Figure 6 shown, the outer contour of the oil duct pipe 42 is in a "U" shape. In this way, through the setting of the oil duct pipe 42, the strength of the half shaft sleeve 40 can be further improved, and the anti-impact performance of the half shaft sleeve 40 can be improved.

[0056] As Figure 1 shown, the front axle assembly 100 according to the second aspect embodiment of the present application includes: a reducer 10, a front axle half shaft (not shown in the figure), a separator 20, a drive shaft 30, and a half shaft sleeve 40. Both ends of the reducer 10 are respectively power-connected to a drive shaft 30 and a front axle half shaft. A separator 20 is arranged between the other end of the front axle half shaft and another drive shaft 30. The separator 20 is used to control the selectively power connection between the drive shaft 30 and the front axle half shaft, and the half shaft sleeve 40 is sleeved on the front axle half shaft.

[0057] Specifically, a differential structure is arranged in the reducer 10. The left front wheel of the vehicle is directly power-connected to a drive shaft 30, and the right front wheel of the vehicle is directly power-connected to another drive shaft 30. One drive shaft 30 or another drive shaft 30 is selectively power-connected to the front axle half shaft through the separator 20. The front axle half shaft is power-connected to the reducer 10 through the differential structure, and the corresponding another drive shaft 30 or one drive shaft 30 is directly power-connected to the differential structure in the reducer 10.

[0058] Thus, in the four-wheel drive mode, the transmission shaft transmits power to the reducer 10. The separator motor of the separator 20 drives the separator gear of the separator 20 to rotate, so that the separation fork of the separator 20 controls the fork sleeve to connect the front axle half shaft and the drive shaft 30, so that the left front wheel and the right front wheel can be used as drive wheels to achieve four-wheel drive.

[0059] In the two-wheel drive mode, the drive shaft no longer transmits power to the speed reducer 10. The separator motor of the separator 20 drives the separator gear to rotate, so that the separation fork controls the fork sleeve to disconnect the power connection between the front axle half shaft and the drive shaft 30. The left front wheel and the right front wheel can rotate independently under the action of the differential structure and no longer drive. Moreover, based on the differential structure and the setting of the separator 20, in the two-wheel drive mode, components such as the driving gear, the driven gear, the differential gear, the differential housing, and the drive shaft in the speed reducer 10 can all be in a static state, avoiding the energy consumption generated by the movement of the above components, so as to improve the fuel economy of the whole vehicle in the two-wheel drive mode and effectively reduce the energy consumption.

[0060] The drive system according to the third aspect embodiment of the present application includes: a front axle assembly 100, a main speed reducer, a transfer case, and a rear axle assembly. The main speed reducer is power-connected to the transfer case, and the transfer case is power-connected to the speed reducer 10 and the rear axle assembly through drive shafts respectively.

[0061] Specifically, after the torque of the engine passes through the main speed reducer, it is transmitted to the transfer case. The transfer case is power-connected to two drive shafts. One drive shaft is mechanically connected to the speed reducer 10 of the front axle assembly 100, and the other drive shaft is power-connected to the rear axle assembly.

[0062] Furthermore, when the transfer case transmits power to both the front axle assembly 100 and the rear axle assembly at the same time, the four-wheel drive mode can be realized. When the transfer case stops transmitting power to the speed reducer 10 and the separator 20 disconnects the power connection between the drive shaft 30 and the front axle half shaft, the two-wheel drive mode of the rear-wheel drive can be realized.

[0063] The vehicle according to the third aspect embodiment of the present application includes the front axle assembly 100 in the above embodiment, and the technical effects are the same as those of the front axle assembly 100 above, which will not be elaborated here.

[0064] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0065] In the description of the present invention, the "first feature" and "second feature" may include one or more of such features.

[0066] In the description of the present invention, the meaning of "a plurality" is two or more.

[0067] In the description of the present invention, a first feature being "above" or "below" a second feature may include direct contact between the first and second features, or may include contact between the first and second features not being direct but through additional features therebetween.

[0068] In the description of the present invention, a first feature being "above", "over" and "on top of" a second feature includes the first feature being directly above and obliquely above the second feature, or merely means that the horizontal height of the first feature is higher than that of the second feature.

[0069] In the description of this specification, the description of reference terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0070] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A half shaft sleeve (40), characterized in that, it includes: a sleeve body (41), both ends of the sleeve body (41) are respectively connected to a reducer housing and a separator housing; an oil passage pipe (42), the oil passage pipe (42) is arranged on the circumferential side of the sleeve body (41); one end of the oil passage pipe (42) communicates with the inner cavity of the reducer housing, and the other end communicates with the inner cavity of the separator housing, so as to conduct the lubricating medium in the reducer housing to the separator housing; a storage oil cavity (413) is arranged on the sleeve body (41); the opening of the storage oil cavity (413) is located on the plane where the end of the oil passage pipe (42) connected to the separator housing is located; the oil passage pipe (42) includes a first pipe (421), an intermediate pipe (422), and a second pipe (423); the first pipe (421) communicates with the inner cavity of the reducer housing; the first pipe (421) is communicated with the second pipe (423) through the intermediate pipe (422); the second pipe (423) communicates with the inner cavity of the separator housing; the diameter of the second pipe (423) gradually decreases in the direction close to the separator housing.

2. The half shaft sleeve (40) according to claim 1, characterized in that, in the Z direction of the whole vehicle, the oil passage pipe (42) is arranged below the sleeve body (41).

3. The half shaft sleeve (40) according to claim 1, characterized in that, in the Z direction of the whole vehicle, the storage oil cavity (413) is located below the end of the oil passage pipe (42).

4. The half shaft sleeve (40) according to claim 1, characterized in that, the storage oil cavity (413) is arranged obliquely, and the cross-sectional area of the storage oil cavity (413) gradually decreases in the direction away from the separator housing.

5. The half shaft sleeve (40) according to claim 1, characterized in that, the first pipe (421) is arranged obliquely.

6. The half shaft sleeve (40) according to claim 5, characterized in that, the inclination angle of the first pipe (421) is 15° - 20°.

7. The half shaft sleeve (40) according to any one of claims 1 - 6, characterized in that, the sleeve body (41) and the oil passage pipe (42) are integrally formed.

8. The half shaft sleeve (40) according to claim 7, characterized in that, the outer contour of the oil passage pipe (42) is in a "U" shape.

9. A front axle assembly (100), characterized in that, it includes: a reducer (10), a front axle half shaft, a separator (20), and a drive shaft (30), both ends of the reducer (10) are respectively power-connected to one drive shaft (30) and the front axle half shaft, a separator (20) is arranged between the other end of the front axle half shaft and the other drive shaft (30), and the separator (20) is used to control the selectively mechanical connection between the drive shaft (30) and the front axle half shaft; the half shaft sleeve (40) according to any one of claims 1 - 8, and the half shaft sleeve (40) is sleeved on the front axle half shaft.

10. A vehicle, characterized in that, comprising: the front axle assembly according to claim 9.

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