Speed reduction mechanism, steering column feel simulator, steer-by-wire system and vehicle

Abstract

This application provides a reduction mechanism, a steering column feel simulator, a steer-by-wire system, and a vehicle, relating to the field of vehicle technology. The reduction mechanism provided in this application includes an internal gear ring, a sun gear, and multiple planetary gears. Multiple planetary gears are disposed within the internal gear ring; at least one planetary gear includes an adjusting structure and two planetary gears arranged axially, the two planetary gears being connected via the adjusting structure, with the outer teeth of adjacent planetary gears offset. The adjusting structure includes an elastic element and a shim; the elastic element is located between two planetary gears and is connected to the planetary gears via the shim. By splitting a single planetary gear into two planetary gears and offsetting their outer teeth, a complementary meshing relationship is formed. Backlash is eliminated by the elastic element. Furthermore, the shim provides physical restraint and stress dispersion for the elastic element, preventing planetary gear separation and damage caused by localized stress concentration.

Description

Technical Field

[0001] This application relates to vehicle technology, and more particularly to a deceleration mechanism, a steering column feel simulator, a steer-by-wire system, and a vehicle. Background Technology

[0002] The steering column feel simulator is a core device used in automotive steer-by-wire systems. It is designed to simulate the tactile experience of a driver perceiving vehicle status (such as road conditions and steering resistance) through the steering wheel in a traditional mechanical steering system.

[0003] In related technologies, steering column feel simulators typically include a motor, a control unit, and a reduction mechanism. The control unit, based on the motor's speed and direction, amplifies the torque via the reduction mechanism and transmits it to the steering column, ultimately acting on the steering wheel. For example, it reduces power assist to enhance road feel at low speeds and increases damping to improve stability at high speeds. Traditional reduction mechanisms are typically spur-gear planetary reduction mechanisms.

[0004] However, due to manufacturing factors such as machining and assembly errors, the gear backlash of planetary reduction mechanisms often fails to meet the ideal design parameters, resulting in abnormal noises or uneven steering feel during driving. Utility Model Content

[0005] In view of this, this application provides a reduction mechanism, a steering column feel simulator, a steer-by-wire system, and a vehicle, which can eliminate gear meshing backlash in the planetary reduction mechanism, reduce noise, and improve steering feel.

[0006] To achieve the above objectives, this application provides a deceleration mechanism, a steering column feel simulator, a steer-by-wire system, and a vehicle, employing the following technical solutions:

[0007] In a first aspect, this application provides a speed reduction mechanism, comprising:

[0008] An internal gear ring, which can be used to connect to a speed reduction output end;

[0009] The sun gear is rotatably disposed within the internal gear ring, and the sun gear is coaxially disposed with the internal gear ring. The sun gear can be used to connect to the reduction input end.

[0010] Multiple planetary gears are disposed within the internal gear ring; the planetary gears mesh with the internal gear ring and with the sun gear.

[0011] At least one of the planetary gears includes an adjustment structure and two planetary gears arranged axially, the two planetary gears being connected by the adjustment structure, and the outer teeth of adjacent planetary gears being staggered.

[0012] The adjustment structure includes an elastic element and a shim; the elastic element is located between the two planetary gears, and the elastic element is connected to the planetary gears through the shim.

[0013] In one possible implementation, the reduction mechanism provided in this application has a mounting groove on the planetary gear, the mounting groove extending about the axis of the planetary gear;

[0014] Between two adjacent planetary gears, a first portion of the elastic element is disposed in the mounting slot of one of the planetary gears, and a second portion of the elastic element is disposed in the mounting slot of the other planetary gear.

[0015] In one possible implementation, the deceleration mechanism provided in this application includes a first abutting portion and a second abutting portion in the gasket;

[0016] In the planetary gear, the first abutting portion is located at the first end of the mounting groove, and the second abutting portion is located at the second end of the mounting groove.

[0017] In one possible implementation, the deceleration mechanism provided in this application has a first abutment portion with a width greater than the width of the mounting groove, and a second abutment portion with a width greater than the width of the mounting groove.

[0018] In one possible implementation, the deceleration mechanism provided in this application has a first insertion cavity at the first end of the mounting groove, and the first abutting part is inserted into the first insertion cavity;

[0019] The second end of the mounting groove is provided with a second insertion cavity, and the second abutment part is inserted into the second insertion cavity.

[0020] In one possible implementation, the deceleration mechanism provided in this application includes a gasket comprising a body and two bent portions respectively connected to both ends of the body. The body and the bent portions are both located outside the mounting groove. The body is connected to the first abutting portion through one of the bent portions, and the body is connected to the second abutting portion through the other bent portion.

[0021] In one possible implementation, the reduction mechanism provided in this application has at least one casting port on the planetary gear, and the gasket is used to be integrally cast with the planetary gear through the casting port.

[0022] In one possible implementation, the deceleration mechanism provided in this application has an arc-shaped elastic element, which is coaxially arranged with the planetary gear, and the central angle of the arc-shaped elastic element is greater than or equal to 240 degrees.

[0023] In one possible implementation, the deceleration mechanism provided in this application includes a plurality of shims, wherein the plurality of shims includes a first shim and a second shim;

[0024] Between two adjacent planetary gears, the elastic element connects one of the planetary gears via the first shim, and the elastic element connects the other planetary gear via the second shim.

[0025] Secondly, this application provides a steering column feel simulator, including a steering column body, a motor and a reduction mechanism as described above, wherein the motor is connected to the reduction input end of the reduction mechanism, and the steering column body is connected to the reduction output end of the reduction mechanism.

[0026] Thirdly, this application provides a steer-by-wire system, including a system body and a steering column feel simulator as described above, wherein the system body is connected to the steering column feel simulator.

[0027] Fourthly, this application provides a vehicle, including a vehicle body and a steer-by-wire system as described above, the steer-by-wire system being disposed on the vehicle body.

[0028] The reduction mechanism, steering column feel simulator, steer-by-wire system, and vehicle provided in this application include a reduction mechanism comprising an internal gear ring, a sun gear, and multiple planetary gears. The internal gear ring can be connected to the reduction output end; the sun gear is rotatably disposed within the internal gear ring, coaxially arranged with the internal gear ring, and can be connected to the reduction input end; multiple planetary gears are disposed within the internal gear ring; the planetary gears mesh with the internal gear ring and with the sun gear; at least one planetary gear includes an adjustment structure and two planetary gears arranged axially, the two planetary gears being connected through the adjustment structure, and the outer teeth of adjacent planetary gears being offset; the adjustment structure includes an elastic element and a shim; the elastic element is located between the two planetary gears, and the elastic element is connected to the planetary gears through the shim.

[0029] By splitting a single planetary gear into two axially arranged planetary gears with their external teeth offset, a complementary meshing relationship is formed. An elastic element provides pressure to the planetary gears, ensuring that at least one planetary gear is always engaged between the sun gear and the two planetary gears, and between the internal gear ring and the two planetary gears. This eliminates the backlash caused by machining or assembly errors between the internal gear ring and the planetary gears, or between the planetary gears and the sun gear. Furthermore, by using shims, the elastic element is physically restrained and stress-dispersed, converting the preload of the elastic element into a stable axial thrust. This avoids both planetary gear separation and damage caused by localized stress concentration.

[0030] In addition to the technical problems solved by the embodiments of this application, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the technical solutions provided by this application, other technical features contained in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0031] The specific embodiments of this application are described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for illustration and explanation of this application, and this application is not limited to the specific embodiments described below.

[0032] Figure 1 This is a schematic diagram of the steering column feel simulator provided in an embodiment of this application;

[0033] Figure 2 An exploded structural diagram of the steering column feel simulator provided in an embodiment of this application;

[0034] Figure 3 Schematic diagram of the deceleration mechanism provided in the embodiments of this application Figure 1 ;

[0035] Figure 4 Schematic diagram of the deceleration mechanism provided in the embodiments of this application Figure 2 ;

[0036] Figure 5 An exploded structural diagram of the planetary gear and elastic element provided in the embodiments of this application;

[0037] Figure 6 This is a schematic diagram of the structure of two planetary gears with misaligned external teeth provided in an embodiment of this application;

[0038] Figure 7 This is a schematic diagram of the structure of the gasket provided in the embodiments of this application;

[0039] Figure 8 An exploded view of one of the planetary gears, shims, and elastic elements provided in an embodiment of this application;

[0040] Figure 9 An exploded view of the two star gears and the spacer memory elastic element provided in the embodiments of this application;

[0041] Figure 10 This is a schematic diagram of the structure of one of the planetary gears provided in an embodiment of this application;

[0042] Figure 11 for Figure 10 Internal structure diagram of AA;

[0043] Figure 12 This is a schematic diagram of the structure of the gear spring and multiple planetary gears provided in the embodiments of this application.

[0044] Explanation of reference numerals in the attached figures:

[0045] 10. Steering column body; 20. Motor; 30. Reduction mechanism; 40. Upper sliding plate; 50. Lower sliding plate; 51. Sliding groove; 60. Pouring port; 100. Internal gear ring; 200. Sun gear; 300. Planetary gear; 310. Adjustment structure; 311. Elastic element; 312. Shim; 312a. First shim; 312b. Second shim; 3121. First abutment part; 3122. Second abutment part; 3123. Body; 3124. Bending part; 320. Planetary gear; 3201. Mounting groove; 3202. First insertion cavity; 3203. Second insertion cavity; 400. Cover plate; 500. Gear spring; 501. Mounting hole.

[0046] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application. The embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0048] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0049] In the description of the embodiments of this application, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this application 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 application.

[0050] In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specified precisely.

[0051] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0052] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0053] As mentioned in the background section, a steering column feel simulator typically includes a motor, a control unit, and a reduction mechanism. The control unit, based on the motor's speed and direction, amplifies the torque via the reduction mechanism and transmits it to the steering column, ultimately acting on the steering wheel. For example, it reduces power assist at low speeds to enhance road feel, and increases damping at high speeds to improve stability. Traditional reduction mechanisms are usually spur-gear planetary reduction mechanisms. Due to manufacturing factors such as machining and assembly errors, the gear backlash of planetary reduction mechanisms often does not meet the ideal design parameters, resulting in abnormal noises or uneven steering feel during driving.

[0054] Based on the aforementioned technical problems, this application provides a reduction mechanism, a steering column feel simulator, a steer-by-wire system, and a vehicle. In this technical solution, the reduction mechanism includes an internal gear ring, a sun gear, and multiple planetary gears. The internal gear ring can be connected to the reduction output end; the sun gear is rotatably disposed within the internal gear ring, coaxially arranged with the internal gear ring, and can be connected to the reduction input end; multiple planetary gears are disposed within the internal gear ring; the planetary gears mesh with the internal gear ring and with the sun gear; at least one planetary gear includes an adjustment structure and two planetary gears arranged axially, the two planetary gears being connected through the adjustment structure, and the outer teeth of adjacent planetary gears being misaligned; the adjustment structure includes an elastic element and a shim; the elastic element is located between the two planetary gears, and the elastic element is connected to the planetary gears through the shim.

[0055] The reduction mechanism provided in this application splits a single planetary gear into two axially arranged planetary gears with their external teeth offset to form a complementary meshing relationship. An elastic element provides pressure to the planetary gears, ensuring that at least one planetary gear is always engaged between the sun gear and the two planetary gears, and between the internal gear ring and the two planetary gears. This eliminates the tooth backlash caused by machining or assembly errors between the internal gear ring and the planetary gears, or between the planetary gears and the sun gear. Furthermore, by using shims, the elastic element is physically restrained and stress-dispersed, converting the preload of the elastic element into a stable axial thrust. This avoids both planetary gear separation and damage caused by localized stress concentration.

[0056] It should be noted that, Figures 1 to 12 The diagram illustrates a simplified representation of the reduction gear, steering column feel simulator, steer-by-wire system, and other components in the vehicle. The specific structures of the reduction gear, steering column feel simulator, steer-by-wire system, and other components in the vehicle are not limited to these. Figures 1 to 12 of examples.

[0057] The present application will now be described in detail with reference to the accompanying drawings and specific embodiments:

[0058] Reference Figure 1 and Figure 2 As shown in the figure, this application provides a steering column feel simulator, including a steering column body 10, a motor 20, and a reduction mechanism 30. The motor 20 is connected to the reduction input end of the reduction mechanism 30, and the steering column body 10 is connected to the reduction output end of the reduction mechanism 30. The motor 20 is a power assist motor 20 in this field, and its output end is connected to the reduction input end of the reduction mechanism 30. The steering column feel simulator also includes a control device (not shown in the figure). The control device, based on the speed and direction of the power assist, amplifies the torque through the reduction mechanism 30 and transmits it to the steering column body 10 through the reduction output end of the reduction mechanism 30, ultimately acting on the steering wheel. This application does not limit the specific implementation of the motor 20 and the steering column body 10.

[0059] To further improve the feel, refer to Figure 1 As shown, an upper sliding plate 40 is provided on the steering column feel simulator, and a lower sliding plate 50 is provided on the vehicle frame. The lower sliding plate 50 is provided with a sliding groove 51. The extension direction of the upper sliding plate 40 is consistent with the extension direction of the sliding groove 51, and the upper sliding plate 40 can move within the sliding groove 51, thereby enabling the steering column feel simulator to move relative to the vehicle frame and further improve the steering wheel feel.

[0060] In one possible implementation, refer to Figure 2 and Figure 3 As shown, the reduction mechanism 30 provided in this embodiment includes an internal gear ring 100, a sun gear 200, and a plurality of planet gears 300. The internal gear ring 100 can be used to connect to the reduction output end, or it can be understood that the internal gear ring 100 forms the reduction output end, and the internal gear ring 100 is connected to the steering column body 10 in a transmission connection.

[0061] The sun gear 200 is rotatably mounted inside the internal gear ring 100. The sun gear 200 and the internal gear ring 100 are coaxially mounted. The sun gear 200 can be used to connect to the reduction input end, or it can be understood as the sun gear forming the reduction input end. The output end of the motor 20 is connected to the sun gear 200 for transmission, or the output end of the motor 20 is directly and fixedly connected to the sun gear coaxially.

[0062] Multiple planetary gears 300 are disposed within the internal gear ring 100; the planetary gears 300 mesh with the internal gear ring 100 and with the sun gear 200. The power transmission from the output end of the motor 20 is transmitted sequentially through the sun gear 200 and the planetary gears 300 to the internal gear ring 100, and then drives the output end of the steering column body 10 to rotate through the internal gear ring 100.

[0063] Reference Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, at least one planetary gear 300 includes an adjustment structure 310 and two planetary gears 320 arranged axially. The two planetary gears 320 are connected by the adjustment structure 310, and the outer teeth of adjacent planetary gears 320 are staggered. The adjustment structure 310 includes an elastic element 311 and a shim 312. The elastic element 311 is located between the two planetary gears 320, and the elastic element 311 is connected to the planetary gears 320 through the shim 312.

[0064] In the above embodiment, by splitting a single planetary gear 300 into two axially arranged planetary gears 320 and setting their external teeth in a staggered manner, a complementary meshing relationship is formed. Furthermore, by providing pressure to the planetary gears 320 through an elastic element 311, at least one planetary gear 320 is always in mesh with the sun gear 200; and at least one planetary gear 320 is always in mesh with the internal gear ring 100.

[0065] This eliminates the tooth backlash that traditionally occurs between the internal gear ring 100 and the planetary gears 300, or between the planetary gears 300 and the sun gear 200, due to machining or assembly errors. Furthermore, by providing shims 312, the elastic element 311 is physically restrained and stress-dispersed, converting the preload of the elastic element 311 into a stable axial thrust. This avoids both separation of the planetary gears 320 caused by localized stress concentration and damage to the planetary gears 320 caused by localized stress concentration.

[0066] In this embodiment, when the power assist motor 20 drives the reduction mechanism 30 and the steering column body 10 to rotate, the power assist motor 20 transmits power to the reduction input end of the reduction mechanism 30. The reduction mechanism 30 then reduces the input power at the reduction input end and outputs it through the reduction output end. When outputting through the reduction output end, the axial direction of the reduction input end is coaxial with the axial direction of the reduction output end. This ensures that the function and performance of the steering column feel simulator are not reduced while the reduction mechanism 30 reduces the speed and increases the torque of the power assist motor 20. Furthermore, by splitting a single planetary gear 300 into two axially arranged planetary gears 320 with their external teeth offset to form a complementary meshing relationship, and connecting them through the elastic element 311 and the washer 312, the power assist motor 20 can be reduced in speed and its torque increased while eliminating the backlash in the meshing transmission of the planetary gears 320 during the driver's reciprocating steering wheel rotation. This prevents abnormal noises or uneven steering feel when the driver turns the steering wheel during driving, thus improving steering quality.

[0067] Furthermore, traditional backlash can cause rigid collisions during gear reversal, generating high-frequency knocking sounds. This embodiment absorbs the reversal impact energy through the elastic element 311; simultaneously, it utilizes misaligned gears to form a continuous meshing path, avoiding discontinuous transmission. This reduces noise and improves cabin quietness. The flexible connection characteristics of the elastic element 311 can buffer sudden torque changes during motor 20 start-up and shutdown, reducing low-frequency humming sounds caused by gear chatter.

[0068] In one possible implementation, refer to Figure 5 , Figure 8 and Figure 9 As shown, the planetary gear 320 is provided with a mounting groove 3201, which extends around the axis of the planetary gear 320; between two adjacent planetary gears 320, the first part of the elastic member 311 is disposed in the mounting groove 3201 of one of the planetary gears 320, and the second part of the elastic member 311 is disposed in the mounting groove 3201 of the other planetary gear 320.

[0069] In the above embodiment, each of the two planetary gears 320 has a mounting groove 3201 on its opposite sidewall, and the two mounting grooves 3201 are axially offset to facilitate the formation of preload. It is understood that, in the axial direction of the elastic element 311, the first and second portions of the elastic element 311 are symmetrically arranged, and the first and second portions of the elastic element 311 together form the elastic element 311. The mounting grooves 3201 extending around the axis on the planetary gears 320 provide a clear radial positioning reference for the elastic element 311. The first and second portions of the elastic element are respectively embedded in the mounting grooves 3201 of adjacent planetary gears 320, forming a physical limit and eliminating the possibility of radial displacement of the elastic element 311 during operation. This avoids preload failure due to misalignment of the elastic element 311, ensuring that the gear meshing clearance is always under control. It also improves the stability of the elastic element 311.

[0070] Furthermore, the first and second portions of the elastic element are respectively fitted into the mounting slots 3201 of the two planetary gears 320, forming a closed-loop locking system across the planetary gears 320. This design allows the elastic element 311 to be supported simultaneously by different planetary gears 320 on both sides, significantly improving its fatigue resistance.

[0071] Reference Figures 5 to 11 As shown, in one possible implementation, the gasket 312 includes a first abutting portion 3121 and a second abutting portion 3122.

[0072] In the planetary gear 320, the first abutment portion 3121 is located at the first end of the mounting groove 3201, and the second abutment portion 3122 is located at the second end of the mounting groove 3201.

[0073] In the above embodiment, since the mounting groove 3201 extends in an arc shape around the axial direction, the first abutment portion 3121 and the second abutment portion 3122 of the gasket 312 are respectively embedded into the first and second ends of the mounting groove 3201, forming a bidirectional physical limit on the elastic element 311. This prevents the elastic element 311 from moving axially and ensures that it can maintain a stable pre-tightened state under long-term vibration. The annular structure formed by the first abutment portion 3121, the second abutment portion 3122, and the mounting groove 3201 causes the elastic element 311 to undergo symmetrical deformation when subjected to alternating loads. This symmetrical force mode significantly reduces the resonance risk of the system. The traditional single-sided supported elastic element 311 is prone to premature failure due to stress concentration. This solution reduces the working stress of the elastic element 311 by distributing the load at both ends, thus reducing the frequency of after-sales replacement.

[0074] In one possible implementation, the first end of the elastic member 311 abuts against the first abutting portion 3121, and the second end of the elastic member 311 abuts against the second abutting portion 3122. Because the first abutting portion 3121 is provided between the first end of the elastic member 311 and the inner wall of the mounting groove 3201, the stress at the end of the elastic member 311 can be dispersed, preventing stress concentration from damaging the planetary gear 320. Similarly, the second abutting portion 3122 provided between the second end of the elastic member 311 and the inner wall of the mounting groove 3201 also prevents stress concentration from damaging the planetary gear 320.

[0075] It should be noted that the accompanying drawings do not restrict whether the end of the elastic member 311 is the first end or the second end. Therefore, there is no restriction on which end of the gasket 312 is the first abutting part 3121 and the second abutting part 3122 located. Alternatively, it can be understood that the first abutting part 3121 and the second abutting part 3122 can be interchanged by the user in actual use. The markings in the accompanying drawings are only for ease of understanding.

[0076] The first end of the elastic member 311 can also be engaged or locked to the first abutment part 3121, and the second end of the elastic member 311 can also be engaged or locked to the second abutment part 3122, which can further improve the stability of the elastic member 311.

[0077] In one possible implementation, the width of the first abutment portion 3121 is greater than the width of the mounting groove 3201, and the width of the second abutment portion 3122 is greater than the width of the mounting groove 3201.

[0078] In the above embodiment, the widths of the first abutting part 3121 and the second abutting part 3122 are both greater than the width of the mounting groove 3201, which can form a large-area fit with the wall of the mounting groove 3201, and evenly distribute the preload applied by the elastic element 311 to a larger area of ​​the planetary gear 320, further reducing stress concentration.

[0079] In one possible implementation, the first end of the mounting groove 3201 is provided with a first insertion cavity 3202, and the first abutting part 3121 is inserted into the first insertion cavity 3202.

[0080] The second end of the mounting groove 3201 is provided with a second insertion cavity 3203, and the second abutment part 3122 is inserted into the second insertion cavity 3203.

[0081] In the above embodiments, the first insertion cavity 3202 and the second insertion cavity 3203 provide axial positioning references for the first abutment portion 3121 and the second abutment portion 3122 of the gasket 312. This eliminates the radial and circumferential degrees of freedom of the gasket 312 and improves its stability.

[0082] In one possible implementation, the gasket 312 includes a body 3123 and two bent portions 3124 respectively connected to both ends of the body 3123. The body 3123 and the bent portions 3124 are both located outside the mounting groove 3201. The body 3123 is connected to the first abutment portion 3121 through one of the bent portions 3124, and the body 3123 is connected to the second abutment portion 3122 through the other bent portion 3124.

[0083] In the above embodiment, when the body 3123 is compressed by the elastic member 311, the bent portion 3124 can improve the connection strength between the first abutment portion 3121 and the second abutment portion 3122 and the body 3123, which is equivalent to forming a reinforcing rib. This further improves the structural strength of the gasket 312.

[0084] In one possible implementation, the planetary gear 320 is provided with at least one pouring port 60, and the gasket 312 is used to be integrally cast with the planetary gear 320 through the pouring port 60.

[0085] Here, the gasket 312 and the planetary gear 320 are integrated through a casting process, completely eliminating the minute gaps and fit tolerances present in traditional assembly connections. This seamless structure allows the preload applied by the elastic element 311 to be directly transmitted to the planetary gear 320, avoiding preload attenuation due to interface slippage. The integrated casting method significantly reduces production steps. Specifically, the gasket 312 is cast from a steel material with high hardness and strength, which further reduces wear on the gasket 312 and improves its compressive strength.

[0086] In specific implementation, the main body 3123 also has a pouring port 60, and the pouring port 60 on the planetary gear 320 is connected to the pouring port 60 on the main body 3123.

[0087] In one possible implementation, the elastic element 311 is configured as an arc-shaped elastic element 311, which is coaxially arranged with the planetary gear 320, and the central angle of the arc-shaped elastic element 311 is greater than or equal to 240 degrees.

[0088] The arc-shaped elastic element 311 wraps around the axial direction of the planetary gear 320 with a central angle of 240 degrees or greater, ensuring that the elastic element 311 can continuously apply radial preload at any angle of rotation of the planetary gear 320, dynamically filling the tooth backlash caused by machining or assembly errors.

[0089] In one possible implementation, there are multiple gaskets 312, including a first gasket 312a and a second gasket 312b; between two adjacent planetary gears 320, an elastic member 311 is connected to one of the planetary gears 320 through the first gasket 312a, and the elastic member 311 is connected to the other planetary gear 320 through the second gasket 312b.

[0090] In the above embodiment, the total preload of the elastic element 311 is shared by the first shim 312a and the second shim 312b, and the stress borne by a single set of shims 312 is reduced, which can provide protection for each planetary gear 320.

[0091] In this embodiment, during the assembly of the elastic element 311 to the mounting groove 3201, the elastic element 311 is first assembled into the mounting groove 3201 of one of the planetary gears 320. Then, the mounting groove 3201 of the other planetary gear 320 is assembled with the elastic element 311. It should be noted that the mounting grooves 3201 on different planetary gears 320 are axially offset. The offset angle is set to 5 degrees to ensure that the external teeth of the two planetary gears 320 are misaligned. Before assembling the planetary gears 320 into the internal gear ring 100, one of the planetary gears 320 needs to be rotated to make the tooth profiles of the two planetary gears 320 coincide, and then they mesh with the internal gear ring 100 and the sun gear 200. There is a preload between the two planetary gears 320 and the internal gear ring 100. This preload effectively eliminates gear meshing backlash during the movement of the reduction mechanism 30, reducing impact vibration and abnormal noise during gear reversal.

[0092] Reference Figure 12 As shown, and in combination Figure 2 The internal gear ring 100 is covered by a cover plate 400. A gear spring 500 is provided on the side of the planetary gear 300 opposite to the cover plate 400. There can be three planetary gears 300. The gear spring 500 has corresponding mounting holes 501, and the rotation shafts of the planetary gears 300 are inserted into the corresponding mounting holes 501. The gear spring 500 can apply an axial force towards the cover plate 400 to the planetary gears 300, causing the planetary gears 300 to abut against the cover plate 400. This improves the stability of the planetary gears 300 during operation and further reduces abnormal noise. Lubricating grease or oil can also be applied between the planetary gears 300 and the cover plate 400 to reduce friction and wear.

[0093] In one possible implementation, the internal teeth of the internal gear ring 100, the external teeth of the sun gear 200, and the external teeth of the planet gears 300 are all helical teeth. Torque transmission is achieved through helical tooth meshing, thereby reducing the operating noise of the motor 20 and allowing for a compact spatial arrangement of the entire reduction mechanism 30, which facilitates the arrangement of other modules.

[0094] In one possible implementation, this application also provides a steer-by-wire system, including a system body and a steering column feel simulator as described above, with the system body connected to the steering column feel simulator. The system body can send the driver's steering intention to the vehicle dynamics model through the steering column feel simulator to achieve vehicle steering, and can also transmit tire-road contact information to the driver to simulate road feel and center the steering wheel.

[0095] In one possible implementation, this application also provides a vehicle, including a vehicle body and the aforementioned steering column feel simulator or a steer-by-wire system, wherein the vehicle body has a frame. The steering column feel simulator is mounted on the frame. The steering column feel simulator has been described in detail above and will not be repeated here. This vehicle possesses the technical effects of the aforementioned steering column feel simulator, namely, it can eliminate gear meshing backlash in the planetary reduction mechanism 30, reduce noise, and improve steering feel.

[0096] In this application embodiment, the vehicle can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended vehicle, etc. This application embodiment does not limit the specific structure of the vehicle.

[0097] The vehicles mentioned in this application embodiment can also refer to large cars, small cars, special-purpose vehicles, etc. For example, according to vehicle type, the vehicles in this application embodiment can be sedans, off-road vehicles, multi-purpose vehicles (MPVs), or other types of vehicles. Of course, they can also be other types of vehicles, and this application embodiment does not limit them.

[0098] The implementation principle of a deceleration mechanism 30, a steering column feel simulator, a steer-by-wire system, and a vehicle according to the embodiments of this application is as follows: the deceleration mechanism 30 includes an internal gear ring 100, a sun gear 200, and multiple planetary gears 300. An internal gear ring 100 can be used to connect to a reduction output end; a sun gear 200 is rotatably disposed within the internal gear ring 100, and the sun gear 200 is coaxially disposed with the internal gear ring 100, and the sun gear 200 can be used to connect to a reduction input end; multiple planet gears 300 are disposed within the internal gear ring 100; the planet gears 300 mesh with the internal gear ring 100, and the planet gears 300 mesh with the sun gear 200; at least one planet gear 300 includes an adjusting structure 310 and two planetary gears 320 disposed axially, the two planetary gears 320 being connected through the adjusting structure 310, and the outer teeth of adjacent planetary gears 320 being misaligned; the adjusting structure 310 includes an elastic element 311 and a shim 312; the elastic element 311 is located between the two planetary gears 320, and the elastic element 311 is connected to the planetary gears 320 through the shim 312.

[0099] By splitting a single planetary gear 300 into two axially arranged planetary gears 320 and misaligning their outer teeth, a complementary meshing relationship is formed. An elastic element 311 provides pressure to the planetary gears 320, ensuring that at least one planetary gear 320 is always engaged between the sun gear 200 and the two planetary gears 320, and between the internal gear ring 100 and the two planetary gears 320. This eliminates the tooth backlash that traditionally occurs between the internal gear ring 100 and the planetary gears 300, or between the planetary gears 300 and the sun gear 200, due to machining or assembly errors. Furthermore, by providing a shim 312, the elastic element 311 is physically restrained and stress-dispersed, converting the preload of the elastic element 311 into a stable axial thrust. This avoids both separation and damage to the planetary gears 320 caused by localized stress concentration. Other embodiments of this application will readily occur to those skilled in the art upon consideration of the specification and practice of the application disclosed herein.

[0100] The embodiments in this application are intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed in this application. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of this application are indicated by the claims.

[0101] It should be understood that this application is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A speed reduction mechanism, characterized in that, include: An internal gear ring (100) is available for connection to a speed reduction output. A sun gear (200) is rotatably disposed within the internal gear ring (100). The sun gear (200) is coaxially disposed with the internal gear ring (100). The sun gear (200) can be used to connect to the reduction input end. A plurality of planetary gears (300) are disposed within the internal gear ring (100); the planetary gears (300) mesh with the internal gear ring (100) and the planetary gears (300) mesh with the sun gear (200); At least one of the planetary gears (300) includes an adjustment structure (310) and two planetary gears (320) arranged axially, the two planetary gears (320) being connected through the adjustment structure (310), and the external teeth of adjacent planetary gears (320) being misaligned; The adjustment structure (310) includes an elastic element (311) and a shim (312); the elastic element (311) is located between the two planetary gears (320), and the elastic element (311) is connected to the planetary gears (320) through the shim (312).

2. The speed reduction mechanism according to claim 1, characterized in that, The planetary gear (320) is provided with a mounting groove (3201) that extends about the axis of the planetary gear (320); Between two adjacent planetary gears (320), a first portion of the elastic element (311) is disposed in a mounting groove (3201) of one of the planetary gears (320), and a second portion of the elastic element (311) is disposed in a mounting groove (3201) of the other planetary gear (320).

3. The speed reduction mechanism according to claim 2, characterized in that, The gasket (312) includes a first abutting portion (3121) and a second abutting portion (3122). In the planetary gear (320), the first abutment (3121) is located at the first end of the mounting groove (3201), and the second abutment (3122) is located at the second end of the mounting groove (3201).

4. The speed reduction mechanism according to claim 3, characterized in that, The width of the first abutting part (3121) is greater than the width of the mounting groove (3201), and the width of the second abutting part (3122) is greater than the width of the mounting groove (3201).

5. The speed reduction mechanism according to claim 3, characterized in that, The first end of the mounting groove (3201) is provided with a first insertion cavity (3202), and the first abutting part (3121) is inserted into the first insertion cavity (3202); The second end of the mounting groove (3201) is provided with a second insertion cavity (3203), and the second abutment part (3122) is inserted into the second insertion cavity (3203).

6. The speed reduction mechanism according to claim 3, characterized in that, The gasket (312) includes a body (3123) and two bent portions (3124) respectively connected to both ends of the body (3123). The body (3123) and the bent portions (3124) are both located outside the mounting groove (3201). The body (3123) is connected to the first abutment portion (3121) through one of the bent portions (3124), and the body (3123) is connected to the second abutment portion (3122) through the other bent portion (3124).

7. The speed reduction mechanism according to claim 1, characterized in that, The planetary gear (320) is provided with at least one pouring port (60), and the gasket (312) is used to be integrally cast with the planetary gear (320) through the pouring port (60).

8. The speed reduction mechanism according to any one of claims 1-7, characterized in that, The elastic element (311) is configured as an arc-shaped elastic element (311), which is coaxially arranged with the planetary gear (320), and the central angle of the arc-shaped elastic element (311) is greater than or equal to 240 degrees.

9. The speed reduction mechanism according to any one of claims 1-7, characterized in that, The number of gaskets (312) is multiple, and the multiple gaskets (312) include a first gasket (312a) and a second gasket (312b). Between two adjacent planetary gears (320), the elastic element (311) is connected to one of the planetary gears (320) via the first washer (312a), and the elastic element (311) is connected to the other planetary gear (320) via the second washer (312b).

10. A steering column feel simulator, characterized in that, It includes a steering column body (10), a motor (20) and a reduction mechanism (30) as described in any one of claims 1 to 9, wherein the motor (20) is connected to the reduction input end of the reduction mechanism (30) and the steering column body (10) is connected to the reduction output end of the reduction mechanism (30).

11. A steer-by-wire system, characterized in that, It includes a system body and a steering column feel simulator as described in claim 10, wherein the system body is connected to the steering column feel simulator.

12. A vehicle, characterized in that, It includes a vehicle body and a steer-by-wire system as described in claim 11, wherein the steer-by-wire system is mounted on the vehicle body.

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