Steering structure and angle module unit thereof

Abstract

The steering structure comprises a steering knuckle, a main pin, a driving assembly and a transmission assembly, and the steering knuckle is used for being fixed to a hub; one end of the main pin is fixed with the steering knuckle, and the other end is a suspension system connecting end and is rotationally connected with a suspension system; the driving assembly is fixed on the steering knuckle; one end of the transmission assembly is fixed with the main pin, and the other end of the transmission assembly is connected with the output end of the driving assembly; when the driving assembly drives the transmission assembly to conduct transmission, the transmission assembly drives the steering knuckle to rotate with the central axis of the main pin as the rotation center. According to the steering structure, the driving assembly and the transmission assembly are integrated on the steering knuckle, the occupied space of the steering structure is reduced, when the driving assembly drives the transmission assembly to rotate, the transmission assembly can drive the steering knuckle to rotate with the central axis of the main pin as the rotation center, and at the moment, the steering knuckle can drive the hub and the wheel to achieve large-angle rotation.

Description

Technical Field

[0001] The present application relates to the field of automobile design and manufacturing, and in particular to a steering structure and a corner module unit thereof. Background Art

[0002] With the rapid development of the automobile industry, the research and development of corner module vehicles has become the research direction of the automobile industry. The corner module unit integrates the drive system, braking system, suspension system and steering system into one, pursuing high integration, lightweight, high load-bearing capacity, vehicle layout space, intelligence, independent wheel steering, and larger turning angle. In addition, the modular state of the corner module is easier to apply to different models. Among them, the structural mode of the steering system has a great influence on the integration, layout space, flexible steering angle and modularity of the corner module unit for different models. A highly integrated and modular steering assembly structure is more conducive to the wheels to achieve flexible steering angles, such as the vehicle's four-wheel steering, such as diagonal driving, lateral driving, and turning around on the spot. Special scene working requirements.

[0003] The steering structure of the existing corner module occupies a large space in the longitudinal, lateral or vertical direction, which not only encroaches on the chassis layout space of the entire vehicle, but also interferes with other parts during steering operation, and the wheel steering angle will be limited. Summary of the invention

[0004] The present application provides a steering structure and an angle module unit thereof, which can solve the problem in the related art that the steering structure occupies the layout space of the entire vehicle chassis and the steering angle of the wheel is limited.

[0005] In a first aspect, an embodiment of the present application provides a steering structure, comprising: a steering knuckle, a kingpin, a drive assembly and a transmission assembly, wherein the steering knuckle is used to be fixed on a wheel hub; one end of the kingpin is fixed to the steering knuckle, and the other end is a suspension system connection end, and is used to be rotatably connected to the suspension system; the drive assembly is fixed to the steering knuckle; the transmission assembly is arranged on the steering knuckle, and one end is fixed to the kingpin, and the other end is connected to the output end of the drive assembly; wherein, when the drive assembly drives the transmission assembly to transmit, the transmission assembly drives the steering knuckle to rotate with the kingpin center axis as the rotation center.

[0006] In combination with the first aspect, in one embodiment, the transmission assembly includes: an active member, an intermediate member and a driven member, the active member is connected to the driving assembly; the intermediate member is rotatably connected to the steering knuckle and is transmission-connected to the active member, and the length extension direction of the active member is perpendicular to the length extension direction of the intermediate member; the driven member is sleeved on the kingpin and fixedly connected to the kingpin, the end of the driven member is fixed to the steering knuckle, one end of the kingpin is fixedly connected to the steering knuckle, and the suspension system connecting end is rotatably connected to the suspension system.

[0007] In combination with the first aspect, in one embodiment, the active member includes: a worm, the worm is connected to the driving assembly, and the worm is located in the middle of the steering knuckle.

[0008] In combination with the first aspect, in one embodiment, the intermediate member includes: a transmission shaft, a worm gear, a fourth bevel gear and a second bevel gear, the transmission shaft is rotatably connected to the steering knuckle; the worm gear is sleeved in the middle of the transmission shaft and is transmission connected to the driving member; the fourth bevel gear is arranged at one end of the transmission shaft and is transmission connected to the driven member; the second bevel gear is arranged at the other end of the transmission shaft and is transmission connected to the driven member.

[0009] In combination with the first aspect, in one embodiment, the first bevel gear, the third bevel gear and the angle sensor, the first bevel gear is fixedly connected to one end of the kingpin and is transmission connected to the middle piece; the third bevel gear is fixedly connected to the other end of the kingpin and is transmission connected to the middle piece; the angle sensor is fixed on the kingpin.

[0010] In combination with the first aspect, in one embodiment, the first bevel gear and the third bevel gear are respectively located at the top and bottom of the steering knuckle, and a flange is provided between the first bevel gear and the top of the steering knuckle and between the third bevel gear and the bottom of the steering knuckle, and the flange is sleeved and fixed on the kingpin and fixed to the steering knuckle;

[0011] An upper end cover is fixed at the top end of the steering knuckle, a lower end cover is fixed at the bottom end of the steering knuckle, the first bevel gear is located inside the upper end cover, and the third bevel gear is located inside the lower end cover.

[0012] In combination with the first aspect, in one embodiment, a receiving cavity is opened in the middle of the steering knuckle, and the driving assembly and the transmission assembly are both arranged inside the receiving cavity.

[0013] In combination with the first aspect, in one embodiment, the drive assembly includes: a steering motor and an execution controller, the steering motor is fixed on the steering knuckle; the execution controller is installed on the steering motor and electrically connected to the steering motor.

[0014] In combination with the first aspect, in one embodiment, the steering structure further includes: a lubrication assembly, wherein the lubrication assembly is connected to the transmission assembly and is used to deliver lubricant to the surface of the transmission assembly.

[0015] In a second aspect, an embodiment of the present application provides a corner module unit, which includes: a steering structure and a suspension system as described above, wherein the suspension system is connected to a kingpin via a hinge structure.

[0016] The beneficial effects brought by the technical solution provided in the embodiments of the present application include:

[0017] The embodiment of the present application provides a steering structure and an angle module unit thereof, in which a drive assembly and a transmission assembly are integrated on a steering knuckle, thereby reducing the space occupied by the steering structure. When the drive assembly drives the transmission assembly to rotate, the transmission assembly can drive the steering knuckle to rotate with the kingpin center axis as the rotation center. At this time, the steering knuckle can drive the wheel hub and the wheel to achieve a large angle of rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of a transmission assembly provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the overall structure provided for an embodiment of the present application;

[0021] Figure 3 A schematic diagram of an angle sensor provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram of the overall structure provided for an embodiment of the present application;

[0023] Figure 5 Schematic diagram of the transmission assembly provided in an embodiment of the present application.

[0024] In the figure: 1. first bevel gear; 2. second bevel gear; 3. steering knuckle; 4. rotation angle sensor; 5. worm gear; 6. steering motor; 7. third bevel gear; 8. fourth bevel gear; 9. fixing pin bolt; 10. upper hinge; 11. lower hinge; 12. worm; 13. transmission shaft; 14. fixing bolt; 15. upper fixing piece; 16. lower fixing piece; 17. execution controller; 18. upper end cover; 19. lower end cover; 20. flange; 21. suspension system; 22. wheel hub; 23. kingpin. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] See also Figures 1 to 5The embodiment of the present application provides a steering structure and an angle module unit thereof, which can solve the problem in the related art that the steering structure occupies the layout space of the entire vehicle chassis and the steering angle of the wheel is limited.

[0027] On the first aspect, an embodiment of the present application provides a steering structure, which includes: a steering knuckle 3, a kingpin 23, a drive assembly and a transmission assembly, wherein the steering knuckle 3 is used to be fixed on the wheel hub 22 and connected to the wheel hub 22 by a fixing bolt 14; one end of the kingpin 23 is fixed to the steering knuckle 3, and the other end is a suspension system connection end, and is used to be rotatably connected to the suspension system 21; the drive assembly is fixed to the steering knuckle 3; the transmission assembly is arranged on the steering knuckle 3, and one end is fixed to the kingpin 23, and the other end is connected to the output end of the drive assembly; wherein, when the drive assembly drives the transmission assembly to transmit, the transmission assembly drives the steering knuckle 3 to rotate with the central axis of the kingpin 23 as the rotation center.

[0028] In the present application, the drive assembly and the transmission assembly are integrated on the steering knuckle 3, which reduces the space occupied by the steering structure. When the drive assembly drives the transmission assembly to rotate, the transmission assembly can drive the steering knuckle 3 to rotate with the central axis of the kingpin 23 as the rotation center. At this time, the steering knuckle 3 can drive the wheel hub 22 and the wheel to achieve a large angle of rotation.

[0029] More specifically, in the present application, the steering knuckle 3 is a "C"-shaped structure as a whole, which plays the role of supporting the trunk and connecting the hub motor in the wheel hub 22. That is to say, a receiving cavity is opened in the middle of the steering knuckle 3, and the drive assembly and the transmission assembly are both arranged inside the receiving cavity. The drive assembly and the transmission assembly are integrated in the middle of the steering knuckle 3, making the overall structural design more compact, and the degree of modularization of the components is high, which effectively avoids the problem of space waste that may occur in the traditional layout, so that the steering knuckle 3 can make more full use of limited space resources, thereby avoiding occupying the layout space of other key parts on the vehicle, and providing more flexibility and possibilities for the design of the whole vehicle.

[0030] In order to improve the stability of the overall structure, kingpins 23 are provided at the top and bottom ends of the steering knuckle 3 , the two kingpins 23 are both passed through the middle of the steering knuckle 3 , and the two kingpins 23 are both connected to the suspension system 21 .

[0031] On the basis of the above embodiment, in this embodiment, the transmission assembly includes: a driving member, an intermediate member and a driven member.

[0032] Among them, the active part is connected to the driving assembly; the intermediate part is rotatably connected to the steering knuckle 3 and is transmission-connected to the active part, and the length extension direction of the active part is perpendicular to the length extension direction of the intermediate part; the driven part is sleeved on the kingpin 23 and fixedly connected to the kingpin 23, the end of the driven part is fixed to the steering knuckle 3, one end of the kingpin 23 is fixedly connected to the steering knuckle 3, and the suspension system connecting end is rotatably connected to the suspension system 21.

[0033] Specifically, in this embodiment, the active component includes: a worm 12, the worm 12 is connected to the driving assembly, the worm 12 is located in the middle of the steering knuckle 3, the worm 12 is arranged between the two main pins 23, and is arranged horizontally. When the driving assembly is working, it can drive the worm 12 to rotate.

[0034] The intermediate part includes: a transmission shaft 13, a worm wheel 5, a fourth helical gear 8 and a second helical gear 2. The transmission shaft 13 is rotatably connected to the steering knuckle 3; the worm wheel 5 is sleeved in the middle of the transmission shaft 13 and is transmission-connected to the driving member; the fourth helical gear 8 is arranged at one end of the transmission shaft 13 and is transmission-connected to the driven member; the second helical gear 2 is arranged at the other end of the transmission shaft 13 and is transmission-connected to the driven member. The transmission shaft 13 is rotatably connected to the steering knuckle 3, and the transmission shaft 13 is arranged vertically and located on one side of the kingpin 23. Since the driven member is sleeved on the kingpin 23, in the present application, two kingpins 23 are arranged, so the fourth helical gear 8 and the second helical gear 2 are arranged to correspond to the two kingpins 23. The fourth helical gear 8 and the second helical gear 2 are respectively fixed at both ends of the transmission shaft 13, and the worm wheel 5 is fixed in the middle of the transmission shaft 13 so that the worm wheel 5 is meshed with the worm 12.

[0035] The worm 12, the drive assembly, the worm wheel 5 and other structures constitute a worm gear reduction transmission mechanism, which realizes deceleration and power transmission through the meshing of the worm wheel 5 and the worm 12. The worm wheel 5 is usually a cylinder with spiral teeth on the surface, while the worm 12 is a long cylinder with a spiral line, and its spiral line matches the shape of the worm wheel teeth. When the worm 12 rotates, its spiral tooth surface pushes the teeth of the worm wheel 5, so that the worm wheel 5 rotates around its own axis. Since the spiral angle of the worm 12 is usually smaller than the tooth surface angle of the worm wheel 5, the high-speed rotation of the worm 12 is reduced after being converted by the worm wheel 5, thereby achieving the purpose of deceleration and torque increase. During the deceleration process, the meshing between the worm 12 and the worm wheel 5 also has a self-locking function, which means that under certain conditions, the worm wheel 5 will not drive the worm 12 to rotate, ensuring the unidirectionality and stability of the transmission.

[0036] Furthermore, the steering structure further includes: a lubrication component, which is connected to the transmission component and is used to deliver lubricant to the surface of the transmission component. Specifically, a lubrication component is provided inside the worm gear reduction transmission mechanism, and the lubrication component can be an oil pipeline connected to an external storage device, which is used to deliver grease. The delivered grease forms a lubrication film between the meshing surfaces of the worm 12 and the worm wheel 5, which can reduce friction and wear, and at the same time help dissipate heat and extend the service life of the reducer.

[0037] The driven member includes: a first bevel gear 1, a third bevel gear 7 and a rotation angle sensor 4, wherein the first bevel gear 1 is fixedly connected to one end of the main pin 23 and is transmission-connected to the intermediate member; the third bevel gear 7 is fixedly connected to the other end of the main pin 23 and is transmission-connected to the intermediate member; the rotation angle sensor 4 is fixed on the main pin 23.

[0038] Among them, the rotation angle sensor 4 reads the actual rotation angle and speed of the kingpin 23, and can accurately feedback the information of the wheel rotation angle and speed. The first bevel gear 1 and the third bevel gear 7 are respectively fixed on the two kingpins 23, and the first bevel gear 1 is meshed with the second bevel gear 2, and the third bevel gear 7 is meshed with the fourth bevel gear 8. When the driving assembly drives the worm 12 to rotate, the worm 12 drives the worm wheel 5 to drive the transmission shaft 13 and the fourth bevel gear 8 and the second bevel gear 2 to rotate. Since the first bevel gear 1 is meshed with the second bevel gear 2, the third bevel gear 7 is meshed with the fourth bevel gear 8, and the first bevel gear 1 and the third bevel gear 7 are respectively fixed on the two kingpins 23, when the fourth bevel gear 8 and the second bevel gear 2 rotate, the first bevel gear 1 and the third bevel gear 7 and the two kingpins 23 are driven to rotate. Since one end of the kingpin 23 is fixed to the steering knuckle 3, when the suspension system 21 is fixed, the kingpin 23 can drive the steering knuckle 3, the wheel hub 22 and the wheel to rotate when it rotates.

[0039] In addition, in the present application, the kingpin 23 can also be fixedly connected to the suspension system 21. In this case, it is necessary to set the first bevel gear 1 and the third bevel gear 7 to be rotatably connected to the two kingpins 23 respectively, and set the kingpin 23 to be rotatably connected to the steering knuckle 3. The first bevel gear 1 and the third bevel gear 7 are fixed to the steering knuckle 3. Therefore, when the driving assembly drives the worm 12 to rotate, the worm 12 drives the worm wheel 5 to drive the transmission shaft 13 and the fourth bevel gear 8 and the second bevel gear 2 to rotate. When the fourth bevel gear 8 and the second bevel gear 2 rotate, they drive the first bevel gear 1 and the third bevel gear 7 and the steering knuckle 3 to rotate.

[0040] On the basis of the above embodiment, in this embodiment, the first bevel gear 1 and the third bevel gear 7 are respectively located at the top and bottom of the steering knuckle 3, and a flange 20 is provided between the first bevel gear 1 and the top of the steering knuckle 3, and between the third bevel gear 7 and the bottom of the steering knuckle 3. The flange 20 is sleeved and fixed on the main pin 23 and fixed to the steering knuckle 3. The flange 20 is used as a connecting piece, and its structure is usually a circular disc made of metal material, with a hole in the middle for installing bolts or nuts. This design ensures a stable connection between the steering knuckle 3 and the main pin 23, and prevents loosening or falling off due to a loose connection.

[0041] An upper fixing piece 15 is also provided at the end of the kingpin 23 located at the top of the steering knuckle 3. The upper fixing piece 15 can be a locking nut. The flange 20 and the first bevel gear 1 there are locked on the kingpin 23 by the locking nut, ensuring a stable connection with the kingpin 23; a lower fixing piece 16 is also provided at the end of the kingpin 23 located at the bottom of the steering knuckle 3. The lower fixing piece 16 can also be a locking nut. The flange 20 and the third bevel gear 7 there are locked on the kingpin 23 by the locking nut, ensuring a stable connection with the kingpin 23.

[0042] Furthermore, an upper end cover 18 is fixed to the top of the steering knuckle 3, a lower end cover 19 is fixed to the bottom of the steering knuckle 3, the first bevel gear 1, the second bevel gear 2 and the flange 20 located on the top of the steering knuckle 3 are located inside the upper end cover 18, and the third bevel gear 7, the fourth bevel gear 8 and the flange 20 located on the bottom of the steering knuckle 3 are located inside the lower end cover 19. The upper end cover 18 and the lower end cover 19 are fixed to the steering knuckle 3 by fixing the pin bolts 9.

[0043] On the basis of the above embodiments, in this embodiment, the driving assembly includes: a steering motor 6 and an execution controller 17, wherein the steering motor 6 is fixed on the steering knuckle 3; and the execution controller 17 is installed on the steering motor 6 and is electrically connected to the steering motor 6. When the execution controller 17 receives the steering command, the steering motor 6 immediately starts working according to the set program, and the worm gear 5 and the worm 12 output the corresponding torque, and the gears of the upper and lower symmetrical helical gear reduction mechanism composed of the first helical gear 1, the second helical gear 2, the third helical gear 7, and the fourth helical gear 8 are driven to rotate through the transmission shaft 13, and then the steering knuckle 3 and the wheel hub 22 motor, the wheel hub 22 and the wheel are driven to rotate through the kingpin 23, thereby realizing steering.

[0044] The upper end cover 18 and the lower end cover 19 fix and cover the upper and lower symmetrical helical gear reduction mechanism composed of the first helical gear 1, the second helical gear 2, the third helical gear 7, and the fourth helical gear 8. The fixing pin bolt 9 mainly connects and fixes the upper end cover 18, the lower end cover 19 and the steering knuckle 3. The transmission shaft 13 has a round key, which connects the upper and lower symmetrical helical gear reduction mechanism and the worm gear reduction transmission mechanism, and transmits the transmission force of the worm gear 5 and the worm gear 12 to the upper and lower symmetrical helical gear reduction mechanism through the transmission shaft 13.

[0045] The fixing bolt 14 connecting the steering knuckle 3 and the wheel hub 22 motor is mainly used to connect the entire steering assembly with the wheel hub 22 motor as a whole. The kingpin 23 and the upper fixing member 15 and the lower fixing member 16 connect the upper and lower symmetrical helical gear reduction mechanism with the steering knuckle 3 as a whole, driving the steering knuckle 3, the inner ring of the angle sensor 4 and the wheel to rotate synchronously.

[0046] In summary, the present application proposes a steering mechanism of a two-stage reducer, wherein the first stage is a worm gear reduction transmission mechanism, the second stage is a vertically symmetrical helical gear reduction mechanism, and a rotation angle sensor 4 is provided. The worm gear reduction transmission mechanism is arranged in the middle of the steering knuckle 3, and the vertically symmetrical helical gear reduction mechanism is arranged above and below the steering knuckle 3. The worm gear reduction transmission mechanism, the small gears (the second helical gear 2 and the fourth helical gear 8) in the vertically symmetrical helical gear reduction mechanism, and the steering knuckle 3 are connected through a transmission shaft 13 with a keyway. The large gears (the first helical gear 1 and the third helical gear 7) in the vertically symmetrical helical gear reduction mechanism are connected to the steering knuckle 3 through a kingpin 23. The steering knuckle 3 is connected to the hub 22 motor on the wheel hub 22, and the rotation angle sensor 4 is assembled on the kingpin 23.

[0047] The output torque of the worm gear 5 and the worm 12 drives the small gear to rotate through the transmission keyway, and the small gear drives the large gear to rotate, and then the large gear drives the kingpin 23 to rotate synchronously with the steering knuckle 3, forming a steering scheme in which the steering mechanism, the steering knuckle 3 and the wheel follow. The steering motor 6 of this application is integrated with the execution controller 17, and the steering motor 6 adopts a permanent magnet synchronous motor with three closed-loop control logics of position closed loop, speed closed loop and current closed loop. The execution controller 17 integrated in the steering motor 6 and the vehicle controller realize information transmission through CAN signals.

[0048] The steering angle sensor 4 rotates together with the kingpin 23, the wheel, etc., and can transmit the actual steering angle and speed signal of the wheel. When the execution controller 17 receives the steering angle signal, the steering motor 6 immediately outputs the corresponding torque according to the set program. After the output torque is reduced and increased by the two-stage reducer, the transmission shaft 13 drives the steering knuckle 3 and the steering wheel to rotate through the key transmission, thereby realizing steering.

[0049] The steering structure in the present application has a compact structural design and a high degree of component integration and modularization, which can solve the problem of limited wheel steering space caused by the fixed position of the steering mechanism and achieve a 90-degree turning angle; the steering structure in the present application can flexibly design the kingpin 23 offset according to needs, which is beneficial to the reduction of steering assist torque and the improvement of the lateral and longitudinal stability control of the vehicle; the steering structure in the present application greatly improves the space utilization rate of the XYZ three-way layout by the integration of the angle module unit, and can be arbitrarily matched and applied to different vehicle models to realize steering functions such as oblique driving, lateral movement, and on-the-spot U-turn.

[0050] In a second aspect, an embodiment of the present application provides a corner module unit, which includes: a steering structure and a suspension system 21 provided in any of the above embodiments of the present application, wherein the suspension system 21 is connected to a kingpin 23 via a hinge structure.

[0051] The hinge structure includes an upper hinge 10 and a lower hinge 11. The upper hinge 10 and the lower hinge 11 are arranged on the suspension system 21 to connect and fix the steering structure with the upper and lower swing arms in the suspension system 21. At the same time, the hinge structure remains stationary with the upper and lower swing arms when the steering structure is steering.

[0052] The steering structure in this application is applied to the corner module unit to solve the spatial layout problem from the horizontal, longitudinal and vertical planes, reduce the space occupied by the chassis layout of the whole vehicle, and improve the space utilization rate. The highly modular installation interface of the corner module unit is unified, which can quickly adapt to different models and functional requirements, greatly improve the freedom of vehicle design, can quickly respond to changes in market demand, shorten the development cycle of new models, and reduce development costs.

[0053] In order to solve the problem of limited wheel steering space caused by the fixed steering structure, the steering structure in the present application can achieve a 90-degree turning angle when turning, and flexibly match different vehicle models to realize functions such as crab walking, lateral movement, and U-turn on the spot.

[0054] The steering structure in this application can flexibly design the kingpin 23 offset according to the vehicle model requirements, which is beneficial to reducing the steering assist torque and improving the lateral and longitudinal stability control of the vehicle; at the same time, under the premise of ensuring the lateral space of the front and rear overhangs of the chassis, the upper and lower swing arm hard point positions are flexibly designed to improve the chassis performance.

[0055] The steering structure in the present application is highly modularized and integrated, and the height of the corner module unit suspension system 21 can be flexibly designed, which can effectively reduce the chassis height to achieve an ultra-low floor, and the ground clearance can reach 160mm, while maximizing the layout space inside the front and rear suspension frames.

[0056] The output steering torque of the steering structure in the present application can be matched and replaced according to the load-bearing requirements of different vehicle models.

[0057] In the description of the present application, it should be noted that the terms "upper", "lower", etc. 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, 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 on the present application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0058] It should be noted that, in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0059] The above description is only a specific implementation of the present application, so that those skilled in the art can understand or implement the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest range consistent with the principles and novel features applied for herein.

Claims

1. A steering structure, characterized in that: It includes: A steering knuckle (3), wherein the steering knuckle (3) is used to be fixed on the wheel hub (22); A kingpin (23), one end of which is fixed to the steering knuckle (3), and the other end of which is a suspension system connection end and is used for rotationally connecting to the suspension system (21); A drive assembly, wherein the drive assembly is fixed on the steering knuckle (3); A transmission assembly, wherein the transmission assembly is arranged on the steering knuckle (3), one end of the transmission assembly is fixed to the kingpin (23), and the other end is connected to the output end of the driving assembly; When the driving assembly drives the transmission assembly to transmit, the transmission assembly drives the steering knuckle (3) to rotate with the central axis of the kingpin (23) as the rotation center.

2. The steering structure according to claim 1, characterized in that: The transmission assembly comprises: An active member connected to the driving assembly; An intermediate member, the intermediate member is rotatably connected to the steering knuckle (3) and is transmission-connected to the active member, and the length extension direction of the active member is perpendicular to the length extension direction of the intermediate member; A follower is sleeved on a kingpin (23) and fixedly connected to the kingpin (23); an end of the follower is fixed to a steering knuckle (3); one end of the kingpin (23) is fixedly connected to the steering knuckle (3); and a suspension system connection end is rotationally connected to a suspension system (21).

3. The steering structure according to claim 2, characterized in that: The active parts include: A worm (12), the worm (12) is connected to the driving assembly, and the worm (12) is located in the middle of the steering knuckle (3).

4. The steering structure according to claim 2, characterized in that: The middleware includes: A transmission shaft (13), wherein the transmission shaft (13) is rotatably connected to the steering knuckle (3); A worm wheel (5), wherein the worm wheel (5) is sleeved on the middle part of the transmission shaft (13) and is transmission-connected to the driving member; a fourth bevel gear (8), the fourth bevel gear (8) being arranged at one end of the transmission shaft (13) and being transmission-connected to the driven member; A second bevel gear (2), the second bevel gear (2) is arranged at the other end of the transmission shaft (13) and is transmission-connected to the driven member.

5. The steering structure according to claim 2, characterized in that: The driven member comprises: A first bevel gear (1), the first bevel gear (1) is fixedly connected to one end of the main pin (23) and is transmission-connected to the intermediate piece; A third bevel gear (7), the third bevel gear (7) being fixedly connected to the other end of the main pin (23) and being transmission-connected to the intermediate piece; A rotation angle sensor (4), wherein the rotation angle sensor (4) is fixed on the kingpin (23).

6. The steering structure according to claim 5, characterized in that: The first bevel gear (1) and the third bevel gear (7) are respectively located at the top and bottom of the steering knuckle (3); a flange (20) is provided between the first bevel gear (1) and the top of the steering knuckle (3), and between the third bevel gear (7) and the bottom of the steering knuckle (3); the flange (20) is sleeved and fixed on the kingpin (23) and is fixed to the steering knuckle (3); An upper end cover (18) is fixed to the top end of the steering knuckle (3), a lower end cover (19) is fixed to the bottom end of the steering knuckle (3), the first bevel gear (1) is located inside the upper end cover (18), and the third bevel gear (7) is located inside the lower end cover (19).

7. The steering structure according to claim 1, characterized in that: A receiving cavity is provided in the middle of the steering knuckle (3), and the driving assembly and the transmission assembly are both arranged inside the receiving cavity.

8. The steering structure according to claim 1, characterized in that: The drive assembly comprises: A steering motor (6), wherein the steering motor (6) is fixed on the steering knuckle (3); An execution controller (17) is installed on the steering motor (6) and is electrically connected to the steering motor (6).

9. The steering structure according to claim 1, characterized in that: The steering structure also includes: The lubrication component is connected to the transmission component and is used to transport lubricant to the surface of the transmission component.

10. A corner module unit, characterized in that: It includes: The steering structure according to any one of claims 1 to 9; A suspension system (21) is connected to a kingpin (23) via a hinge structure.

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