Vehicle steering system, in-situ turning method and driving method

Abstract

The invention provides a vehicle steering system, a turning-around method and a driving method. The vehicle steering system comprises a first gear, a planetary differential mechanism, a first clutch, a second clutch, a third clutch, a first half shaft and a second half shaft, the first gear, the planetary differential mechanism, the first clutch, the second clutch and the third clutch are arranged in a shell, the first half shaft and the second half shaft penetrate through the shell, the planetary differential mechanism is connected between the first half shaft and the second half shaft, and the first clutch is connected between the first gear and the planetary differential mechanism. The second clutch is connected between the planetary differential mechanism and the shell, the third clutch is connected between the first half shaft and the first gear, and the first gear can be driven to rotate. According to the vehicle steering system, the vehicle can turn around in situ when the first clutch is opened, the second clutch and the third clutch are closed, the vehicle can run when the first clutch is closed, the second clutch is opened and the third clutch is opened, and the first half shaft and the second half shaft are driven by the first gear to rotate, so that the number of drivers is reduced; and the structure complexity and the production cost are relatively low.

Description

Technical Field

[0001] This invention relates to the field of vehicles, and more specifically to a vehicle steering system, a U-turn method, and a driving method. Background Technology

[0002] Tank turning is a technology that allows a vehicle to turn around on the spot by controlling the movement of its wheels. In this technology, each wheel is connected to a corresponding motor, which controls the movement of that wheel, so that wheels on the same side of the vehicle rotate in the same direction, while wheels on opposite sides rotate in the opposite direction, thus enabling the tank to turn around. However, this technology requires a large number of motors, resulting in a complex structure and high production costs. Summary of the Invention

[0003] The present invention aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of the present invention provide a vehicle steering system, and a method for turning around in place and a driving method based on the vehicle steering system.

[0005] The vehicle steering system of this invention includes:

[0006] The system comprises a first gear, a planetary differential, a first clutch, a second clutch, a third clutch, a housing, a first half-shaft, and a second half-shaft. The first gear, the planetary differential, the first clutch, the second clutch, and the third clutch are all disposed within the housing. The first half-shaft and the second half-shaft are both mounted on the housing wall. The planetary differential is connected between the first half-shaft and the second half-shaft. The first clutch is connected between the first gear and the planetary differential. The second clutch is connected between the planetary differential and the housing. The third clutch is connected between the first half-shaft and the first gear. The first gear is rotatable by a drive.

[0007] The vehicle steering system of this invention can turn around on the spot when the first clutch is open, the second clutch is closed, and the third clutch is closed, and can drive when the first clutch is closed, the second clutch is open, and the third clutch is open. The first half-shaft and the second half-shaft rotate under the drive of the first gear, thereby reducing the number of drives and having lower structural complexity and production cost.

[0008] In some embodiments, the first gear, the first clutch, and the third clutch are all surrounding the outer periphery of the first half-shaft, and the second clutch is surrounding the outer periphery of the second half-shaft.

[0009] In some embodiments, the vehicle steering system further includes a first bracket and a second bracket, the first bracket being connected to the first gear, the first bracket having a first protrusion extending axially along the first half-shaft and surrounding the outer periphery of the first half-shaft, the second bracket being connected to the planetary differential, at least a portion of the second bracket extending axially along the first half-shaft and surrounding the outer periphery of the first half-shaft, and at least a portion of the second bracket being arranged radially alongside the first protrusion along the first half-shaft, the first clutch being connected between the first protrusion and at least a portion of the second bracket.

[0010] In some embodiments, the vehicle steering system further includes a first bracket and a bushing, the first bracket having a second protrusion extending axially along the first half-shaft and disposed on the outer periphery of the first half-shaft, the bushing being sleeved on the first half-shaft and disposed side by side with the second protrusion along the radial direction of the first half-shaft, and the third clutch being connected between the second protrusion and the bushing.

[0011] In some embodiments, the vehicle steering system further includes a first bracket and a second bracket, the first bracket being connected to the first gear and the second bracket being connected to the planetary differential. The first bracket includes a first protrusion and a second protrusion, both of which extend axially along the first half-shaft and surround the outer periphery of the first half-shaft. The first protrusion and the second protrusion are arranged side by side radially along the first half-shaft. At least a portion of the second bracket extends axially along the first half-shaft and surrounds the outer periphery of the first half-shaft, with at least a portion of the second bracket located between the first protrusion and the second protrusion.

[0012] In some embodiments, the vehicle steering system further includes a bearing that surrounds the outer periphery of the first half-shaft and connects between the second protrusion and at least a portion of the second bracket.

[0013] In some embodiments, the vehicle steering system further includes a third bracket connected to the planetary differential, at least a portion of the third bracket extending axially along the second half-shaft and surrounding the outer periphery of the second half-shaft, the housing having a boss surrounding the outer periphery of the second half-shaft and arranged radially along the second half-shaft alongside at least a portion of the third bracket, and the second clutch being connected between the boss and at least a portion of the third bracket.

[0014] In some embodiments, both the first clutch and the second clutch are connected to the planetary carrier of the planetary differential.

[0015] The vehicle turning-around method of this invention, implemented based on the vehicle steering system described in any of the above embodiments, includes: the first clutch being disengaged, the second clutch being engaged, and the third clutch being engaged.

[0016] The vehicle turning-around method of this invention is implemented through the vehicle steering system of this invention, which enables the vehicle to have fewer drives and has lower structural complexity and production cost.

[0017] The vehicle driving method of this invention, implemented based on the vehicle steering system described in any of the above embodiments, includes: the first clutch being closed, the second clutch being open, and the third clutch being open.

[0018] The vehicle driving method of this invention, implemented through the vehicle steering system of this invention, enables the vehicle to have fewer driving actuators and lower structural complexity and production costs. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a vehicle steering system according to an embodiment of the present invention.

[0020] Figure label:

[0021] 1. First gear; 2. Planetary differential; 3. First clutch; 4. Second clutch; 5. Third clutch; 6. Housing; 61. Boss; 7. First half-shaft; 8. Second half-shaft; 9. First bracket; 91. First protrusion; 92. Second protrusion; 10. Second bracket; 20. Bushing; 30. Bearing; 40. Third bracket; 50. Second gear. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] The following is for reference. Figure 1 A vehicle steering system, a U-turn method, and a driving method according to embodiments of the present invention are described.

[0024] like Figure 1 As shown, the vehicle steering system of this embodiment includes a first gear 1, a planetary differential 2, a first clutch 3, a second clutch 4, a third clutch 5, a housing 6, a first half-shaft 7, and a second half-shaft 8.

[0025] The first gear 1, planetary differential 2, first clutch 3, second clutch 4, and third clutch 5 are all housed within the housing 6. For example... Figure 1 As shown.

[0026] The first half-shaft 7 and the second half-shaft 8 both pass through the shell wall of the housing 6. For example... Figure 1 As shown, the first half-shaft 7 and the second half-shaft 8 are preferably, but not limited to, coaxially arranged. The first half-shaft 7 extends in the left-right direction and passes through the left side shell wall of the housing 6, and the second half-shaft 8 extends in the left-right direction and passes through the right side shell wall of the housing 6. The portions of the first half-shaft 7 and the second half-shaft 8 located outside the housing 6 are used to connect the hub.

[0027] The planetary differential 2 is connected between the first half-shaft 7 and the second half-shaft 8. For example... Figure 1 As shown.

[0028] The first clutch 3 is connected between the first gear 1 and the planetary differential 2, the second clutch 4 is connected between the planetary differential 2 and the housing 6, and the third clutch 5 is connected between the first half-shaft 7 and the first gear 1. Figure 1 As shown.

[0029] The first gear 1 can be driven to rotate. For example... Figure 1 As shown.

[0030] In the vehicle steering system of this embodiment, when the first clutch 3 is open, the second clutch 4 is closed, and the third clutch 5 is closed, the first gear 1 drives the first half-shaft 7 to rotate, and through the planetary differential 2 drives the second half-shaft 8 to rotate in the opposite direction to the first half-shaft 7, so as to enable turning on the spot. When the first clutch 3 is closed, the second clutch 4 is open, and the third clutch 5 is open, the first gear 1 drives the first half-shaft 7 and the second half-shaft 8 to rotate in the same direction through the planetary differential 2, so as to enable driving. The first half-shaft 7 and the second half-shaft 8 both rotate under the drive of the first gear 1, so that the first half-shaft 7 and the second half-shaft 8 can be driven by a single drive unit through the first gear 1, thereby reducing the number of drive units and having lower structural complexity and production cost.

[0031] It should be noted that driving refers to the forward, backward, and turning movements of a vehicle. When turning, a vehicle has a larger turning radius compared to making a U-turn on the spot.

[0032] In some embodiments, the first gear 1, the first clutch 3, and the third clutch 5 are all surrounded around the outer periphery of the first half-shaft 7, and the second clutch 4 is surrounded around the outer periphery of the second half-shaft 8.

[0033] like Figure 1 As shown, the first gear 1, the first clutch 3, and the third clutch 5 are all located between the left end of the planetary differential 2 and the left side wall of the housing 6, and are arranged in a ring around the first half-shaft 7. The second clutch 4 is located between the right end of the planetary differential 2 and the right side wall of the housing 6, and is arranged in a ring around the second half-shaft 8. This makes the vehicle steering system more compact and the layout more reasonable.

[0034] In some embodiments, the vehicle steering system further includes a first bracket 9 and a second bracket 10. The first bracket 9 is connected to a first gear 1 and has a first protrusion 91 extending axially along a first half-shaft 7 and surrounding the outer periphery of the first half-shaft 7. The second bracket 10 is connected to a planetary differential 2. At least a portion of the second bracket 10 extends axially along a first half-shaft 7 and surrounds the outer periphery of the first half-shaft 7, and at least a portion of the second bracket 10 and the first protrusion 91 are arranged side by side radially along the first half-shaft 7. A first clutch 3 is connected between the first protrusion 91 and at least a portion of the second bracket 10.

[0035] like Figure 1 As shown, the first bracket 9 is located inside the housing 6. The first bracket 9 includes a base and a first protrusion 91. The base of the first bracket 9 is an annular ring that surrounds the first half-shaft 7 and is vertically arranged. The base of the first bracket 9 is connected to the right end face of the first gear 1. The first protrusion 91 protrudes to the right from the base of the first bracket 9 and is an annular ring surrounding the first half-shaft 7.

[0036] The second bracket 10 is located inside the housing 6. The second bracket 10 includes a base and an extension. The base of the second bracket 10 is an annular ring that surrounds the first half-shaft 7 and is vertically arranged. The base of the second bracket 10 is connected to the left end of the planet carrier of the planetary differential 2. The extension of the second bracket 10 extends to the left from the base of the second bracket 10 and is an annular ring that surrounds the first half-shaft 7.

[0037] The extension of the second bracket 10 and the first protrusion 91 are arranged side by side along the radial direction of the first half-axis 7. In other words, one of the extension of the second bracket 10 and the first protrusion 91 surrounds the outer periphery of the other.

[0038] The first clutch 3 is connected between the extension of the second bracket 10 and the first protrusion 91, so that the first clutch 3 is connected between the first gear 1 and the planetary differential 2.

[0039] It is understood that in some other embodiments, the first bracket 9 may not have a base, and the left end of the first protrusion 91 is connected to the first gear 1.

[0040] It is understood that in some other embodiments, the second bracket 10 may not have a base, and the right end of the extension of the second bracket 10 is connected to the planet carrier of the planetary differential 2.

[0041] It is understood that the first protrusion 91 and the extension of the second support 10 are not limited to being arranged in a ring shape. In other embodiments, the first protrusion 91 and the extension of the second support 10 are both multiple protrusions arranged in a ring at intervals along the circumference of the first half-axis 9.

[0042] In some embodiments, the vehicle steering system further includes a first bracket 9 and a bushing 20. The first bracket 9 has a second protrusion 92 extending axially along the first half-shaft 7 and disposed on the outer periphery of the first half-shaft 7. The bushing 20 is sleeved on the first half-shaft 7 and arranged radially alongside the second protrusion 92 along the first half-shaft 7. A third clutch 5 is connected between the second protrusion 92 and the bushing 20.

[0043] like Figure 1 As shown, the first bracket 9 is located inside the housing 6. The first bracket 9 includes a base and a second protrusion 92. The base of the first bracket 9 is an annular ring that surrounds the first half-shaft 7 and is vertically arranged. The base of the first bracket 9 is connected to the right end face of the first gear 1. The second protrusion 92 protrudes to the right from the base of the first bracket 9 and is an annular ring that surrounds the first half-shaft 7.

[0044] The bushing 20 is located inside the housing 6 and is fitted onto the first half-shaft 7, with the second protrusion 92 surrounding the outer periphery of the bushing 20.

[0045] The third clutch 5 is connected between the bushing 20 and the second protrusion 92, so that the third clutch 5 is connected between the first half-shaft 7 and the first gear 1.

[0046] It is understood that in some other embodiments, the first bracket 9 may not have a base, and the left end of the second protrusion 92 may be connected to the first gear 1.

[0047] It is understood that the second protrusion 92 is not limited to being arranged in a ring shape. In other embodiments, the second protrusion 92 is a plurality of protrusions arranged in a ring-shaped interval along the circumference of the first half-axis 9.

[0048] In some embodiments, the vehicle steering system further includes a first bracket 9 and a second bracket 10. The first bracket 9 is connected to a first gear 1, and the second bracket 10 is connected to a planetary differential 2. The first bracket 9 includes a first protrusion 91 and a second protrusion 92. Both the first protrusion 91 and the second protrusion 92 extend axially along the first half-shaft 7 and surround the outer periphery of the first half-shaft 7. The first protrusion 91 and the second protrusion 92 are arranged side by side radially along the first half-shaft 7. At least a portion of the second bracket 10 extends axially along the first half-shaft 7 and surrounds the outer periphery of the first half-shaft 7. At least a portion of the second bracket 10 is located between the first protrusion 91 and the second protrusion 92.

[0049] like Figure 1 As shown, the first bracket 9 has a first protrusion 91 and a second protrusion 92. In other words, the first bracket 9 includes a base and a first protrusion 91 and a second protrusion 92.

[0050] The first protrusion 91 surrounds the outer periphery of the second protrusion 92, and the extension of the second bracket 10 is located between the first protrusion 91 and the second protrusion 92, so as to connect the first clutch 3 between the extension of the second bracket 10 and the first protrusion 91, and to connect the third clutch 5 between the bushing 20 and the second protrusion 92, and to make the structure of the vehicle steering system compact.

[0051] In some embodiments, the vehicle steering system further includes a bearing 30 that surrounds the outer periphery of the first half-shaft 7 and is connected between the second protrusion 92 and at least a portion of the second bracket 10.

[0052] like Figure 1 As shown, the bearing 30 is an annular ring surrounding the first half-shaft 7. The bearing 30 is connected between the second protrusion 92 and the extension of the second bracket 10 to support and limit the second protrusion 92 and the extension of the second bracket 10, while preventing friction between the second protrusion 92 and the extension of the second bracket 10.

[0053] It is understood that the vehicle steering system may also be omitted. In other embodiments, the second protrusion 92 and the extension of the second bracket 10 abut and can slide relative to each other.

[0054] In some embodiments, the vehicle steering system further includes a third bracket 40 connected to the planetary differential 2. At least a portion of the third bracket 40 extends axially along the second half-shaft 8 and surrounds the outer periphery of the second half-shaft 8. The housing 6 is provided with a boss 61 surrounding the outer periphery of the second half-shaft 8 and arranged radially alongside at least a portion of the third bracket 40. A second clutch 4 is connected between the boss 61 and at least a portion of the third bracket 40.

[0055] like Figure 1 As shown, the third bracket 40 is disposed inside the housing 6. The third bracket 40 includes a base and an extension. The base of the third bracket 40 is an annular ring that surrounds the second half-shaft 8 and is vertically arranged. The base of the third bracket 40 is connected to the right end of the planet carrier of the planetary differential 2. The extension of the third bracket 40 extends to the right from the base of the third bracket 40 and is an annular ring that surrounds the second half-shaft 8.

[0056] The right end of the shell wall of the shell 6 is provided with a boss 61 protruding to the left, and the boss 61 is annular around the second half-axis 8.

[0057] The extension of the third bracket 40 and the boss 61 are arranged side by side along the radial direction of the second half-axis 8. In other words, one of the extension of the third bracket 40 and the boss 61 surrounds the outer periphery of the other.

[0058] The second clutch 4 is connected between the boss 60 and the extension of the third bracket 40, so that the second clutch 4 is connected between the housing 6 and the planetary differential 2.

[0059] It is understood that in other embodiments, the third bracket 40 may also not have a base, and the left end of the extension of the third bracket 40 is connected to the planet carrier of the planetary differential 2.

[0060] It is understood that the extension and boss 61 of the third support 40 are not limited to being arranged in a ring shape. In other embodiments, the extension and boss 61 of the third support 40 are multiple units arranged in a ring at intervals along the circumference of the second half-axis 8.

[0061] In some embodiments, the first clutch 3 and the second clutch 4 are both connected to the planetary carrier of the planetary differential 2.

[0062] like Figure 1 As shown, the base of the second bracket 10 and the base of the third bracket 40 are both connected to the planetary carrier of the planetary differential 2, so that the first clutch 3 and the second clutch 4 are indirectly connected to the planetary carrier of the planetary differential 2, so that the first clutch 3 is open, the second clutch 4 is closed and the third clutch 5 is closed, and the vehicle can drive when the first clutch 3 is closed, the second clutch 4 is open and the third clutch 5 is open.

[0063] In some embodiments, such as Figure 1 As shown, the vehicle steering system also includes a second gear 50, which meshes with the first gear 1. The second gear 50 is connected to a driver such as a motor, or is connected to a driver such as a motor via a drive shaft, thereby driving the first gear 1 to rotate under the drive of the driver.

[0064] like Figure 1 As shown, the vehicle turning-around method of this invention is implemented based on the vehicle steering system of this invention, including: the first clutch 3 is open, the second clutch 4 is closed, and the third clutch 5 is closed.

[0065] At this time, the planetary carrier of the planetary differential 2 is fixed by the second clutch 4 and disconnected from the power transmission of the first gear 1 by the first clutch 3. The first gear 1 drives the first half-shaft 7 to rotate through the third clutch 5. The first half-shaft 7 drives the second half-shaft 8 to rotate in the opposite direction to the first half-shaft 7 through the planetary differential 2, so that it can turn around on the spot.

[0066] The vehicle turning-around method of this invention is implemented through the vehicle steering system of this invention, which enables the vehicle to have fewer drives and has lower structural complexity and production cost.

[0067] like Figure 1As shown, the vehicle driving method of this embodiment of the invention is implemented based on the vehicle steering system of this embodiment of the invention, including: the first clutch 3 being closed, the second clutch 4 being open, and the third clutch 5 being open.

[0068] At this time, the second clutch 4 releases the planetary carrier of the planetary differential 2, and the first half-shaft 7 is disconnected from the power transmission of the first gear 1 by the third clutch 5. The power of the first gear 1 is transmitted to the planetary differential 2, so that the first half-shaft 7 and the second half-shaft 8 can rotate in the same direction at the same time through the planetary differential 2, thereby enabling driving.

[0069] The vehicle driving method of this invention, implemented through the vehicle steering system of this invention, enables the vehicle to have fewer driving actuators and lower structural complexity and production costs.

[0070] In the description of this invention, it should be understood that the terms "left", "right", "vertical", "horizontal", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0071] Furthermore, the terms "first" and "second" are used only for distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0072] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0073] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0074] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A vehicle steering system characterized by, It comprises: a first gear (1), a planetary differential (2), a first clutch (3), a second clutch (4), a third clutch (5), a housing (6), a first half shaft (7) and a second half shaft (8), the first gear (1), the planetary differential (2), the first clutch (3), the second clutch (4) and the third clutch (5) are all arranged in the housing (6), the first half shaft (7) and the second half shaft (8) are both arranged through the shell wall of the housing (6), the planetary differential (2) is connected between the first half shaft (7) and the second half shaft (8), the first clutch (3) is connected between the first gear (1) and the planetary differential (2), the second clutch (4) is connected between the planetary differential (2) and the housing (6), the third clutch (5) is connected between the first half shaft (7) and the first gear (1), and the first gear (1) can be driven to rotate.

2. The vehicle steering system of claim 1, wherein The first gear (1), the first clutch (3) and the third clutch (5) all surround the outer periphery of the first half shaft (7), and the second clutch (4) surrounds the outer periphery of the second half shaft (8).

3. The vehicle steering system of claim 2, wherein, It also comprises a first support (9) and a second support (10), the first support (9) is connected with the first gear (1), the first support (9) has a first protruding portion (91) extending in the axial direction of the first half shaft (7) and surrounding the outer periphery of the first half shaft (7), the second support (10) is connected with the planetary differential (2), at least part of the second support (10) extends in the axial direction of the first half shaft (7) and surrounds the outer periphery of the first half shaft (7), and at least part of the second support (10) is arranged radially alongside the first protruding portion (91) along the first half shaft (7), and the first clutch (3) is connected between the first protruding portion (91) and at least part of the second support (10).

4. The vehicle steering system of claim 2 or 3, wherein, It also comprises a first support (9) and a shaft sleeve (20), the first support (9) has a second protruding portion (92) extending in the axial direction of the first half shaft (7) and arranged on the outer periphery of the first half shaft (7), the shaft sleeve (20) is sleeved on the first half shaft (7) and arranged radially alongside the second protruding portion (92) along the first half shaft (7), and the third clutch (5) is connected between the second protruding portion (92) and the shaft sleeve (20).

5. The vehicle steering system of claim 4, wherein, Further comprising a first support (9) connected with the first gear (1) and a second support (10) connected with the planetary differential (2), the first support (9) comprising a first protrusion (91) and a second protrusion (92), the first protrusion (91) and the second protrusion (92) both extending along the axial direction of the first half shaft (7) and surrounding the outer periphery of the first half shaft (7), the first protrusion (91) and the second protrusion (92) being arranged side by side along the radial direction of the first half shaft (7), at least part of the second support (10) extending along the axial direction of the first half shaft (7) and surrounding the outer periphery of the first half shaft (7), the at least part of the second support (10) being located between the first protrusion (91) and the second protrusion (92).

6. The vehicle steering system of claim 5, wherein, Further comprising a bearing (30) surrounding the outer periphery of the first half shaft (7) and connected between the second protrusion (92) and the at least part of the second support (10).

7. The vehicle steering system of claim 2, wherein Further comprising a third support (40) connected with the planetary differential (2), at least part of the third support (40) extending along the axial direction of the second half shaft (8) and surrounding the outer periphery of the second half shaft (8), the housing (6) being provided with a boss (61) surrounding the outer periphery of the second half shaft (8) and arranged side by side along the radial direction of the second half shaft (8) with the at least part of the third support (40), the second clutch (4) being connected between the boss (61) and the at least part of the third support (40).

8. The vehicle steering system of claim 1, wherein, The first clutch (3) and the second clutch (4) are both connected with the carrier of the planetary differential (2).

9. A vehicle turning method characterized by, Based on the vehicle steering system implementation of any one of claims 1-8, comprising: the first clutch (3) is open, the second clutch (4) is closed, and the third clutch (5) is closed.

10. A vehicle steering method characterized by, Based on the vehicle steering system implementation of any one of claims 1-8, comprising: the first clutch (3) is closed, the second clutch (4) is open, and the third clutch (5) is open.

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