Steering gear assembly and vehicle

Abstract

The utility model discloses a steering gear assembly and a vehicle, the steering gear assembly comprises a first transmission shaft, one end of the first transmission shaft is linked with a steering wheel, the other end of the first transmission shaft is provided with a planet carrier, the planet carrier is rotatably provided with a planet wheel, and the extension direction of the planet carrier is orthogonal to the extension direction of the first transmission shaft; the second transmission shaft is rotatably arranged on at least part of the periphery of the first transmission shaft, and a driving wheel in transmission connection with the planet wheel is arranged at the end, facing the planet carrier, of the second transmission shaft; the third transmission shaft is arranged on the side, away from the second transmission shaft, of the planet carrier, and a driven wheel in transmission connection with the planet wheel is arranged at the end, facing the planet carrier, of the third transmission shaft; the driving mechanism is provided with a driving end, and the driving end is suitable for driving the second transmission shaft to rotate. According to the steering gear assembly, the transmission ratio of the steering gear assembly is adjustable, the active steering function is achieved, and the driving safety is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicles, and in particular to a steering gear assembly and a vehicle. Background Art

[0002] In the related art, the steering system of a car plays a great role in the car. At present, common steering mechanisms include mechanical steering gears, hydraulic steering gears, electro-hydraulic steering gears, electric steering gears and wire-controlled steering gears, etc. In the actual driving process of the vehicle, the driver usually needs to have better steering maneuverability when the vehicle is driving at low speeds and better control stability when driving at high speeds. The existing steering mechanism cannot meet the driver's need to adjust the steering speed ratio or steering ratio because the steering speed ratio or transmission ratio is fixed. Utility Model Content

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to provide a steering gear assembly, the transmission ratio of which is adjustable, so as to realize the function of active steering and improve driving safety.

[0004] The present application also provides a vehicle having the steering gear assembly.

[0005] According to the steering gear assembly of the embodiment of the present application, it includes: a first transmission shaft, one end of the first transmission shaft is linked to the steering wheel, and the other end of the first transmission shaft is provided with a planetary carrier, and the planetary carrier is rotatably provided with planetary wheels, and the extension direction of the planetary carrier is orthogonal to the extension direction of the first transmission shaft; a second transmission shaft, the second transmission shaft is rotatably provided on at least a portion of the outer periphery of the first transmission shaft, and the end of the second transmission shaft facing the planetary carrier is provided with a driving wheel transmission-connected to the planetary wheels; a third transmission shaft, the third transmission shaft is provided on a side of the planetary carrier away from the second transmission shaft, and the end of the third transmission shaft facing the planetary carrier is provided with a driven wheel transmission-connected to the planetary wheels; a driving mechanism, the driving mechanism has a driving end, and the driving end is suitable for driving the second transmission shaft to rotate.

[0006] According to the steering gear assembly of the embodiment of the present application, the steering gear assembly has a first transmission shaft, a second transmission shaft and a third transmission shaft, the first transmission shaft is provided with a planetary carrier, the planetary carrier is provided with planetary wheels, the second transmission shaft and the third transmission shaft are respectively provided with a driving wheel and a driven wheel connected to the planetary wheels, the driving mechanism can drive the second transmission shaft to rotate so as to change the rotation speed of the planetary wheels, thereby realizing the adjustable transmission ratio of the steering gear assembly, realizing the function of active steering, and improving driving comfort, safety and driving experience.

[0007] In some embodiments of the present application, the second transmission shaft is constructed as a hollow shaft, and an avoidance cavity extending in the axial direction is formed in the second transmission shaft. At least a portion of the first transmission shaft is accommodated in the avoidance cavity and can selectively rotate relative to the second transmission shaft; the planetary gears are respectively meshed with the driving wheel and the driven wheel, and the driving wheel and the driven wheel are arranged opposite to each other in the axial direction.

[0008] In some embodiments of the present application, a first transmission part extending in a circumferential direction is provided at one end of the second transmission shaft away from the planetary carrier, and a second transmission part dynamically connected to the first transmission part is provided on the driving end.

[0009] In some embodiments of the present application, the steering gear assembly also includes: a locking mechanism, the locking mechanism having a shell and a locking shaft, a receiving cavity formed in the shell, at least a portion of the locking shaft is received in the receiving cavity, and the free end of the locking shaft can be selectively locked with the second transmission part.

[0010] In some embodiments of the present application, a plurality of locking teeth are formed on the second transmission part and are arranged at circumferential intervals, each of the locking teeth extends in a direction away from the second transmission part, and a locking groove is formed between two adjacent locking teeth, and the free end of the locking shaft can be selectively moved into the locking groove to lock the second transmission part.

[0011] In some embodiments of the present application, the planetary gear is configured as a plurality of planetary gears spaced apart in the circumferential direction, and the planetary carrier is configured as a plurality of planetary gears connected one-to-one with the plurality of planetary gears.

[0012] In some embodiments of the present application, the steering gear assembly also includes: a steering gear housing, on which a screw rod is movably provided; a bearing, which is arranged in the steering gear housing and sleeved on the screw rod, and a first transmission gear is formed on the bearing, and a fourth transmission shaft, at least a portion of the fourth transmission shaft is accommodated in the steering gear housing, one end of the fourth transmission shaft is linked to the third transmission shaft, and the other end of the fourth transmission shaft is provided with a second transmission gear linked to the first transmission gear.

[0013] In some embodiments of the present application, the steering gear assembly also includes: a second bearing, the second bearing is arranged in the steering gear housing and sleeved on the screw rod, a third transmission gear is formed on the second bearing, the first bearing and the second bearing are respectively located at the two ends of the second transmission gear in the radial direction, a first threaded portion is formed on the inner surface of the first bearing, a second threaded portion is formed on the inner surface of the second bearing, and a third threaded portion matching with the first threaded portion and a fourth threaded portion matching with the second threaded portion are formed on the screw rod.

[0014] In some embodiments of the present application, a thread direction of the first threaded portion is opposite to a thread direction of the second threaded portion.

[0015] The following is a brief description of a vehicle according to an embodiment of the present application.

[0016] According to the embodiment of the present application, the vehicle is provided with the steering gear assembly of the above-mentioned embodiment. Since the vehicle of the embodiment of the present application is provided with the steering gear assembly of the above-mentioned embodiment, the steering gear assembly of the vehicle drives the second transmission shaft to rotate through the driving mechanism to change the rotation speed of the planetary gear, thereby realizing the adjustable transmission ratio of the steering gear assembly, realizing the function of active steering, and improving driving comfort, safety and driving experience.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a partial structural schematic diagram of a steering gear assembly according to an embodiment of the present application;

[0020] Figure 2 yes Figure 1 Schematic cross-sectional view of ;

[0021] Figure 3 is a schematic diagram of the structure after the locking mechanism and the second transmission part cooperate according to an embodiment of the present application;

[0022] Figure 4 yes Figure 3 A schematic cross-sectional view of the middle locking mechanism;

[0023] Figure 5 is a partial structural schematic diagram of a steering gear assembly according to an embodiment of the present application;

[0024] Figure 6 yes Figure 5 Schematic diagram of the internal structure of the middle steering gear assembly;

[0025] Figure 7 yes Figure 5 Schematic diagram of the structure of the medium power assist motor.

[0026] Reference numerals:

[0027] 10. Steering gear assembly; 100. Column sub-assembly;

[0028] 11. first transmission shaft; 111. planet carrier; 112. planet gear;

[0029] 12. Second transmission shaft; 121. Driving wheel;

[0030] 122. a first transmission part; 123. an avoidance chamber;

[0031] 13. The third transmission shaft; 131. The driven wheel;

[0032] 14. Driving mechanism; 141. Driving end;

[0033] 142. second transmission part; 1421. locking tooth; 1422. locking groove;

[0034] 15. locking mechanism; 151. housing; 1511. accommodating chamber;

[0035] 152, locking shaft; 153, coil; 154, elastic member; 155, plug interface;

[0036] 16. Steering gear housing; 161. Screw rod; 162. Third threaded portion; 163. Fourth threaded portion;

[0037] 17. bearing; 171. first transmission gear;

[0038] 18. fourth transmission shaft; 181. second transmission gear;

[0039] 19. Second bearing; 191. Third transmission gear;

[0040] 101. Power-assisting motor; 102. Motor body; 103. Worm gear; 104. Worm; 105. Coupling. DETAILED DESCRIPTION

[0041] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0042] Reference below Figure 1-Figure 6A steering gear assembly 10 according to an embodiment of the present application is described. The steering gear assembly 10 includes a first transmission shaft 11, a second transmission shaft 12, a third transmission shaft 13 and a driving mechanism 14. One end of the first transmission shaft 11 is linked to the steering wheel, and a planetary carrier 111 is provided at the other end of the first transmission shaft 11. A planetary gear 112 is rotatably provided on the planetary carrier 111. The extension direction of the planetary carrier 111 is orthogonal to the extension direction of the first transmission shaft 11. The second transmission shaft 12 is rotatably provided on at least part of the periphery of the first transmission shaft 11. A driving wheel 121 transmission-connected to the planetary gear 112 is provided at one end of the second transmission shaft 12 facing the planetary carrier 111. The third transmission shaft 13 is provided on a side of the planetary carrier 111 away from the second transmission shaft 12. A driven wheel 131 transmission-connected to the planetary gear 112 is provided at one end of the third transmission shaft 13 facing the planetary carrier 111. The driving mechanism 14 has a driving end 141, and the driving end 141 is suitable for driving the second transmission shaft 12 to rotate.

[0043] At present, the steering system of a car plays a great role in the car. At present, common steering mechanisms include mechanical steering gears, hydraulic steering gears, electro-hydraulic steering gears, electric steering gears and wire-controlled steering gears, etc. In the actual driving process of the vehicle, the driver usually needs to have better steering maneuverability when the vehicle is driving at low speeds and better control stability when driving at high speeds. The existing steering mechanism cannot meet the driver's need to adjust the steering speed ratio or steering ratio because the steering speed ratio or transmission ratio is fixed.

[0044] like Figure 1 and Figure 2 As shown, specifically, the steering gear assembly 10 includes a column subassembly 100, and the column subassembly 100 can be linked with the steering wheel, wherein the column subassembly 100 has a first transmission shaft 11, a second transmission shaft 12 and a third transmission shaft 13, and the first transmission shaft 11, the second transmission shaft 12 and the third transmission shaft 13 can be constructed as a steering column, specifically, one end of the first transmission shaft 11 can be linked with the steering wheel, when the driver turns the steering wheel, the first transmission shaft 11 can rotate synchronously, and the other end of the first transmission shaft 11 is provided with a planetary carrier 111, and the free end of the planetary carrier 111 is rotatably provided with a planetary wheel 112, and the extension direction of the planetary carrier 111 is orthogonal to the extension direction of the first transmission shaft 11, thereby providing a certain installation space for the installation of the planetary wheel 112.

[0045] Furthermore, the second transmission shaft 12 is rotatably disposed on at least a portion of the periphery of the first transmission shaft 11. In a specific embodiment, the planetary gear 112 is configured as a plurality of planetary gears 112, and the plurality of planetary gears 112 can be spaced apart in the circumferential direction. The planetary carrier 111 is configured as a plurality of planetary gears 112 that are connected one-to-one with the plurality of planetary gears 112. By providing a plurality of planetary carriers 111 and a plurality of planetary gears, the force transmission efficiency between the first transmission shaft 11 and the planetary gears 112 can be improved.

[0046] like Figure 1 As shown, a driving wheel 121 is provided at one end of the second transmission shaft 12 facing the planetary carrier 111, and the driving wheel 121 can be connected to the planetary wheel 112 in transmission, wherein the extension directions of the first transmission shaft 11 and the second transmission shaft 12 can be the same, the length of the second transmission shaft 12 is smaller than the length of the first transmission shaft 11, and at least part of the first transmission shaft 11 can extend out of the second transmission shaft 12, ensuring that the first transmission shaft 11 can be effectively linked with the steering wheel.

[0047] The third transmission shaft 13 can be arranged on the side of the planetary carrier 111 away from the second transmission shaft 12. A driven wheel 131 is arranged on the end of the third transmission shaft 13 facing the planetary carrier 111. The driven wheel 131 can be connected to the planetary wheel 112 in a transmission manner. The other end of the third transmission shaft 13 can be connected to the steering system. In a specific embodiment, the extension direction of the third transmission shaft 13 is the same as the extension direction of the first transmission shaft 11 and the second transmission shaft 12. The rotator assembly also has a driving mechanism 14. The driving mechanism 14 can have a driving end 141, and the driving end 141 can be used to drive the second transmission shaft 12 to rotate. Specifically, the driving mechanism 14 can be constructed as a driving motor, and the driving end 141 can be linked with the output shaft of the driving motor.

[0048] During actual use, when the driver turns the steering wheel, the steering wheel can drive the first transmission shaft 11 to rotate, the planetary carrier 111 on the first transmission shaft 11 can rotate synchronously with the first transmission shaft 11, and the planetary wheel 112 can drive the driven wheel 131 to rotate, so that the first transmission shaft 11 drives the third transmission shaft 13 to rotate. When the driving mechanism 14 is working, the driving mechanism 14 drives the second transmission shaft 12 to rotate, and the second transmission shaft 12 drives the driving wheel 121 to rotate. At this time, the driving wheel 121 transmits power to the planetary wheel 112, thereby interfering with the rotation speed of the planetary wheel 112.

[0049] For example, when the driver is driving at high speed, the drive mechanism 14 can provide reverse assistance, thereby reducing the sensitivity of turning and maintaining the stability of the steering wheel, so that the driver can operate more smoothly when encountering an emergency. When the driver is driving slowly and needs to drive steadily, the drive mechanism 14 can provide normal assistance, making the steering easier and convenient for the driver to operate in urban congestion or parking. Therefore, the drive mechanism 14 and the second transmission shaft 12 can provide reverse assistance when the turning angle is too large, and provide positive assistance when the turning angle is too small, so that the transmission ratio of the steering gear assembly 10 is adjustable, and the function of active steering is realized.

[0050] In short, the steering gear assembly 10 of the present application has a first transmission shaft 11, a second transmission shaft 12 and a third transmission shaft 13. The first transmission shaft 11 is provided with a planetary carrier 111, and the planetary carrier 111 is provided with a planetary gear 112. The second transmission shaft 12 and the third transmission shaft 13 are respectively provided with a driving wheel 121 and a driven wheel 131 that are transmission-connected to the planetary gear 112. The driving mechanism 14 can drive the second transmission shaft 12 to rotate so as to change the rotation speed of the planetary gear 112, thereby realizing the adjustable transmission ratio of the steering gear assembly 10, realizing the function of active steering, and improving driving comfort, safety and driving experience.

[0051] like Figure 2 As shown, in some embodiments of the present application, the second transmission shaft 12 can be constructed as a hollow shaft, which can reduce the weight of the second transmission shaft 12 to a certain extent, and an avoidance cavity 123 extending axially is formed in the second transmission shaft 12, at least a portion of the first transmission shaft 11 can be accommodated in the avoidance cavity 123, and the first transmission shaft 11 can rotate relative to the second transmission shaft 12, so that the first transmission shaft 11 and the second transmission shaft 12 do not affect each other during rotation, and the above-mentioned arrangement can also reduce the size of the steering column, reduce the occupied space, and facilitate the arrangement of parts.

[0052] The planetary gear 112 can mesh with the driving wheel 121 and the driven wheel 131 respectively, and the driving wheel 121 and the driven wheel 131 are arranged opposite to each other in the axial direction, and the driving wheel 121, the planetary gear 112 and the driven wheel 131 can be constructed as bevel gears. By constructing the driving wheel 121, the planetary gear 112 and the driven wheel 131 as bevel gears, it is possible to ensure that the power transmission between the driving wheel 121, the planetary gear 112 and the driven wheel 131 is stable, and the power transmission efficiency between the driving wheel 121, the planetary gear 112 and the driven wheel 131 is improved.

[0053] like Figure 1 and Figure 2As shown, in some embodiments of the present application, the end of the second transmission shaft 12 away from the planetary carrier 111 is provided with a first transmission part 122, and the first transmission part 122 can be extended in the circumferential direction of the second transmission shaft 12, and the second transmission part 142 can be provided on the driving end 141, and the second transmission part 142 can be connected with the first transmission part 122 by power, so that when the driving end 141 rotates, the driving end 141 can drive the second transmission part 142 to rotate, and the second transmission part 142 drives the first transmission part 122 to rotate, so that the power of the driving end 141 is transmitted to the second transmission shaft 12, and the power transmission efficiency between the driving end 141 and the second transmission part 142 is improved. In a specific embodiment, the first transmission part 122 and the second transmission part 142 can be configured as gears. By configuring the first transmission part 122 and the second transmission part 142 as gears, the transmission process can be smooth, and the impact and vibration generated during the transmission process are reduced, thereby improving the reliability of the transmission.

[0054] like Figure 3 As shown, in some embodiments of the present application, the steering gear assembly 10 further includes a locking mechanism 15, the locking mechanism 15 having a housing 151 and a locking shaft 152, a housing 151 may be formed with a receiving cavity 1511, at least a portion of the locking shaft 152 may be received in the receiving cavity 1511, and the free end of the locking shaft 152 may be selectively locked with the second transmission portion 142, and a plug interface 155 connected to the wiring harness is further formed on the housing 151, specifically, a coil 153 is further provided on the housing 151, the coil 153 may control the movement of the locking shaft 152, and an elastic member 153 is further provided between the locking shaft 152 and the inner wall of the receiving cavity 1511. 54. When the coil 153 is not energized, the elastic member 154 can drive the locking shaft 152 to move toward the outside of the accommodating cavity 1511, so that the free end of the locking shaft 152 is locked with the second transmission part 142. When the coil 153 is energized, the locking shaft 152 is affected by the magnetic force and moves toward the inside of the accommodating cavity 1511, and the locking shaft 152 can compress the elastic member 154. At this time, the locking shaft 152 and the second transmission part 142 are not locked, and the driving mechanism 14 can drive the second transmission part 142 to rotate. By adopting the above-mentioned driving method, the second transmission part 142 can be easily controlled, thereby improving the controllability of the column sub-assembly 100.

[0055] like Figure 4As shown, in actual use, when the locking shaft 152 locks the second transmission part 142, the second rotating part does not rotate, and the driving wheel 121 does not interfere with the rotation of the planetary wheel 112. At this time, a common electric power steering system is implemented. When the locking mechanism 15 unlocks the second transmission part 142, the driving component can drive the second transmission shaft 12 to rotate and interfere with the rotation speed of the planetary wheel 112. When the steering wheel angle is too large, reverse power is provided, and when the steering wheel angle is too small, forward power is provided, thereby changing the transmission ratio of the steering gear assembly 10 and helping the driver to control the vehicle more easily.

[0056] It should be noted that when the vehicle speed is high, the steering angle of the steering wheel is too large, and the drive component can be started to compensate for the reverse angle. When the vehicle speed is low, the steering angle of the steering wheel is too small, and the drive component can be started to compensate for the forward angle, thereby realizing the function of active steering. In the electric power steering system, when the power motor 101 fails, it is more labor-saving for the driver to manually turn the steering wheel to steer. Among them, the power motor 101 includes a motor body 102 and a drive end connected to the motor body. The drive end can be constructed as a worm gear 103 and a worm 104 structure. The motor body and the worm can be connected by a coupling 105. The worm gear 103 can be set on the output shaft of the steering gear assembly 10. The power motor 101 can control the size and direction of the steering assist after receiving the instruction of the electric power steering control unit, thereby assisting the driver to control the vehicle more easily and improving safety and comfort.

[0057] like Figure 3 As shown, in some embodiments of the present application, a plurality of locking teeth 1421 are formed on the second transmission part 142, and the plurality of locking teeth 1421 are arranged at intervals in the circumferential direction of the second transmission part 142 and extend in a direction away from the second transmission part 142, and a locking groove 1422 is formed between two adjacent locking teeth 1421, wherein the free end of the locking shaft 152 can selectively move toward the locking groove 1422 and lock the second transmission part 142, specifically, by interlocking the locking shaft 152 with the locking groove 142 2 is snap-fitted, the locking shaft 152 is received in the locking groove 1422, the outer surface of the locking shaft 152 abuts against the inner surface of the locking groove 1422 to limit the movement of the second transmission part 142, and the use of a plurality of locking teeth 1421 structure can ensure that when the second transmission part 142 needs to be locked, the locking shaft 152 can quickly cooperate with the locking teeth 1421 to achieve rapid locking of the second transmission part 142, thereby preventing the second transmission part 142 from continuing to rotate when the locking shaft 152 is received in the locking groove 1422.

[0058] like Figure 5 and Figure 6As shown, in some embodiments of the present application, the steering gear assembly 10 also includes a steering gear housing 16, a first bearing 17 and a fourth transmission shaft 18, a screw rod 161 is movably provided on the steering gear housing 16, the first bearing 17 can be provided in the steering gear housing 16, and the first bearing 17 is sleeved on at least a portion of the outer periphery of the screw rod 161, a first transmission gear 171 can be formed in the axial direction, at least a portion of the fourth transmission shaft 18 is accommodated in the steering gear housing 16, and one end of the fourth transmission shaft 18 is linked to the third transmission shaft 13, and a second transmission gear 181 is provided at the other end of the fourth transmission shaft 18, and the second transmission gear 181 can be linked to the first transmission gear 171.

[0059] In a specific embodiment of the present application, when the third transmission shaft 13 rotates, it can drive the fourth transmission shaft 18 to rotate, and the second transmission gear 181 of the fourth transmission shaft 18 can rotate synchronously therewith. The second transmission gear 181 can drive the first transmission gear 171 to rotate. The first transmission gear 171 drives partial rotation of the first bearing 17 and thereby moves the screw rod 161 in the steering gear housing 16. Compared with the traditional gear shaft rack, the use of the first transmission gear 171 and the second transmission gear 181 is more labor-saving. The first transmission gear 171 and the second transmission gear 181 have a large meshing area and uniform contact stress distribution, which reduces friction loss and power consumption, thereby improving transmission efficiency.

[0060] like Figure 6 As shown, in some embodiments of the present application, the steering gear assembly 10 also includes a second bearing 19, which can be arranged in the steering gear housing 16, and the second bearing 19 is sleeved on at least a portion of the outer periphery of the screw rod 161. A third transmission gear 191 can be formed on the second bearing 19, and the first bearing 17 and the second bearing 19 are respectively located at the two ends of the second transmission gear 181 in the radial direction, a first threaded portion is formed on the inner surface of the first bearing 17, and a second threaded portion is formed on the inner surface of the second bearing 19. A third threaded portion 162 that cooperates with the first threaded portion and a fourth threaded portion 163 that cooperates with the second threaded portion are formed on the screw rod 161. By cooperating the first threaded portion with the third threaded portion 162 and the second threaded portion with the fourth threaded portion 163, the fourth transmission shaft 18 can drive the screw rod 161 to complete the movement of the corresponding stroke.

[0061] It should be noted that since the first bearing 17 and the second bearing 19 are respectively located at the two ends of the second transmission gear 181 in the radial direction, the rotation directions of the first transmission gear 171 and the third transmission gear 191 are opposite, that is, the thread direction of the inner surface of the first bearing 17 is opposite to the thread direction of the inner surface of the second bearing 19. Therefore, the thread direction of the first threaded portion is opposite to the thread direction of the second threaded portion, so that the fourth transmission shaft 18 can mobilize the screw 161 to move in the width direction of the vehicle, thereby driving the steering knuckle to steer.

[0062] In addition, the above structure can ensure that the screw rod 161 does not need to be tooth cut and maintains a complete cylindrical shape, so that the diameter of the screw rod 161 can be reduced under the same steering force, or the screw rod 161 can bear a greater steering force and withstand a greater load under the same diameter.

[0063] The following is a brief description of a vehicle according to an embodiment of the present application.

[0064] According to the embodiment of the present application, the vehicle is provided with the steering gear assembly 10 of the above embodiment. Since the vehicle of the embodiment of the present application is provided with the steering gear assembly 10 of the above embodiment, the steering gear assembly 10 of the vehicle drives the second transmission shaft 12 to rotate through the driving mechanism 14, thereby changing the rotation speed of the planetary gear 112, thereby realizing the adjustable transmission ratio of the steering gear assembly 10, realizing the function of active steering, and improving driving comfort, safety and driving experience.

[0065] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0066] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0067] In the description of the present application, “plurality” means two or more.

[0068] In the description of the present application, a first feature being “on” or “under” a second feature may include that the first and second features are directly in contact with each other, or may include that the first and second features are not in direct contact with each other but are in contact with each other via another feature therebetween.

[0069] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0070] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does 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.

[0071] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A steering gear assembly, characterized in that: include: A first transmission shaft (11), one end of the first transmission shaft (11) being linked to a steering wheel, a planet carrier (111) being provided at the other end of the first transmission shaft (11), a planet gear (112) being rotatably provided on the planet carrier (111), and an extension direction of the planet carrier (111) being orthogonal to an extension direction of the first transmission shaft (11); a second transmission shaft (12), the second transmission shaft (12) being rotatably disposed on at least a portion of the outer periphery of the first transmission shaft (11), and a driving wheel (121) drivingly connected to the planetary gear (112) being disposed at one end of the second transmission shaft (12) facing the planetary carrier (111); a third transmission shaft (13), the third transmission shaft (13) being arranged on a side of the planetary carrier (111) away from the second transmission shaft (12), and a driven wheel (131) drivingly connected to the planetary wheel (112) being arranged at one end of the third transmission shaft (13) facing the planetary carrier (111); A driving mechanism (14), wherein the driving mechanism (14) has a driving end (141), and the driving end (141) is suitable for driving the second transmission shaft (12) to rotate.

2. The steering gear assembly according to claim 1, characterized in that: The second transmission shaft (12) is constructed as a hollow shaft, and an axially extending avoidance cavity (123) is formed in the second transmission shaft (12); at least a portion of the first transmission shaft (11) is accommodated in the avoidance cavity (123) and can selectively rotate relative to the second transmission shaft (12); The planetary gear (112) is meshed with the driving gear (121) and the driven gear (131) respectively, and the driving gear (121) and the driven gear (131) are arranged opposite to each other in the axial direction.

3. The steering gear assembly according to claim 2, characterized in that: A first transmission part (122) extending in the circumferential direction is arranged at one end of the second transmission shaft (12) away from the planet carrier (111), and a second transmission part (142) dynamically connected to the first transmission part (122) is arranged on the driving end (141).

4. The steering gear assembly according to claim 3, characterized in that: Also includes: A locking mechanism (15), the locking mechanism (15) comprising a housing (151) and a locking shaft (152), the housing (151) forming a receiving cavity (1511), at least a portion of the locking shaft (152) being received in the receiving cavity (1511), and the free end of the locking shaft (152) being selectively locked with the second transmission part (142).

5. The steering gear assembly according to claim 4, characterized in that: The second transmission part (142) is formed with a plurality of locking teeth (1421) arranged at circumferential intervals, each of the locking teeth (1421) extends in a direction away from the second transmission part (142), a locking groove (1422) is formed between two adjacent locking teeth (1421), and the free end of the locking shaft (152) can be selectively moved into the locking groove (1422) to lock the second transmission part (142).

6. The steering gear assembly according to claim 1, characterized in that: The planetary gears (112) are configured as a plurality of planetary gears (112) that are spaced apart in the circumferential direction, and the planetary carrier (111) is configured as a plurality of planetary gears (112) that are connected in a one-to-one correspondence with the plurality of planetary gears (112).

7. The steering gear assembly according to claim 1, characterized in that: Also includes: A steering gear housing (16), wherein a screw rod (161) is movably disposed on the steering gear housing (16); a first bearing (17), wherein the first bearing (17) is disposed in the steering gear housing (16) and sleeved on the screw rod (161), and a first transmission gear (171) is formed on the first bearing (17), A fourth transmission shaft (18), at least a portion of the fourth transmission shaft (18) is accommodated in the steering gear housing (16), one end of the fourth transmission shaft (18) is linked to the third transmission shaft (13), and the other end of the fourth transmission shaft (18) is provided with a second transmission gear (181) linked to the first transmission gear (171).

8. The steering gear assembly according to claim 7, characterized in that: Also includes: A second bearing (19), wherein the second bearing (19) is arranged in the steering gear housing (16) and sleeved on the screw rod (161), a third transmission gear (191) is formed on the second bearing (19), the first bearing (17) and the second bearing (19) are respectively located at two ends of the second transmission gear (181) in a radial direction, a first threaded portion is formed on the inner surface of the first bearing (17), a second threaded portion is formed on the inner surface of the second bearing (19), and a third threaded portion (162) matched with the first threaded portion and a fourth threaded portion (163) matched with the second threaded portion are formed on the screw rod (161).

9. The steering gear assembly according to claim 8, characterized in that: A thread direction of the first thread portion is opposite to a thread direction of the second thread portion.

10. A vehicle, characterized in that: Comprising a steering gear assembly as described in any one of claims 1-9.

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