Steering-by-wire mechanism and vehicle

Abstract

The utility model relates to the technical field of automobiles, in particular to a steer-by-wire mechanism and a vehicle, the steer-by-wire mechanism comprises an input shaft, the first end of the input shaft can be connected with a steering wheel; the feedback motor is in transmission connection with the second end of the input shaft; the casing pipe is arranged on the input shaft in a sleeving manner; the transmission assembly is arranged in the sleeve, the transmission assembly is in transmission connection with the input shaft, and the transmission assembly can move in the axial direction of the input shaft along with rotation of the input shaft; the elastic force feedback assembly is arranged in the sleeve, the transmission assembly is in transmission connection with the elastic force feedback assembly, and the transmission assembly can drive the elastic force feedback assembly to generate elastic force. According to the utility model, a driver can effectively obtain the feedback torque of the steering wheel in the steering process.

Description

Technical Field

[0001] The utility model relates to the technical field of automobiles, in particular to a wire-controlled steering mechanism and a vehicle. Background Art

[0002] In a steer-by-wire system, there is no mechanical connection such as an intermediate shaft between the steering wheel and the steering transmission. The steering command is directly transmitted to the steering motor through the sensor and controller, thereby driving the wheel to steer. The steer-by-wire system has a torque feedback motor that can simulate the steering force in order to give the driver feedback on the steering force.

[0003] In a direct-drive steer-by-wire system, the steering wheel and the feedback motor are directly connected by a shaft, without a speed reduction mechanism in between. When the feedback motor fails, that is, it cannot provide feedback torque, the steering wheel is in a freely rotatable state, and the driver cannot obtain effective steering force feedback, so the steering wheel can rotate without restriction. Since the driver cannot feel the torque feedback, it is easy to cause safety accidents.

[0004] Therefore, a steer-by-wire mechanism and a vehicle are needed to solve the above problems. Utility Model Content

[0005] The utility model aims to provide a wire-controlled steering mechanism and a vehicle, which can ensure that the driver effectively obtains the feedback torque of the steering wheel during the steering process.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A steer-by-wire mechanism, comprising:

[0008] an input shaft, a first end of the input shaft being connectable to a steering wheel;

[0009] A feedback motor, the feedback motor is drivingly connected to the second end of the input shaft;

[0010] A sleeve, wherein the sleeve is sleeved on the input shaft;

[0011] A transmission assembly, the transmission assembly is arranged in the sleeve, the transmission assembly is in transmission connection with the input shaft, and the transmission assembly can move along the axial direction of the input shaft as the input shaft rotates;

[0012] The elastic force feedback component is arranged in the sleeve, and the transmission component is transmission-connected with the elastic force feedback component, and the transmission component can drive the elastic force feedback component to generate elastic force.

[0013] Furthermore, the input shaft has an external thread, and the transmission assembly includes a transmission nut, which is threadedly connected to the input shaft, and the transmission nut can move along the axial direction of the input shaft as the input shaft rotates.

[0014] Further, the elastic force feedback component includes a first force feedback component and a second force feedback component, the first force feedback component is located between the first end of the input shaft and the transmission nut, and the second force feedback component is located between the feedback motor and the transmission nut. When the input shaft rotates along a first rotation direction, the first force feedback component can be compressed to generate elastic force, and when the input shaft rotates along a second rotation direction opposite to the first rotation direction, the second force feedback component can be compressed to generate elastic force.

[0015] Further, the first force feedback component includes a first spring seat, a first compression elastic member and a first sliding block, the first spring seat is fixedly arranged in the sleeve, the first sliding block is slidably sleeved on the input shaft, the first compression elastic member is located between the first spring seat and the first sliding block, and the transmission nut can move along the axial direction of the input shaft to push the first sliding block to move.

[0016] Furthermore, a first mounting groove is formed on the first spring seat, a second mounting groove is formed on the first sliding block, one end of the first compression elastic member is located in the first mounting groove, and the other end of the first compression elastic member is located in the second mounting groove.

[0017] Further, the second force feedback component includes a second spring seat, a second compression elastic member and a second sliding block, the second spring seat is fixedly arranged in one end of the sleeve close to the feedback motor, the second sliding block is slidably sleeved on the input shaft, the second compression elastic member is located between the second spring seat and the second sliding block, and the transmission nut can move along the axial direction of the input shaft to push the second sliding block to move.

[0018] Furthermore, a third mounting groove is formed on the second spring seat, a fourth mounting groove is formed on the second sliding block, one end of the second compression elastic member is located in the third mounting groove, and the other end of the second compression elastic member is located in the fourth mounting groove.

[0019] Furthermore, a guide assembly is arranged between the sleeve and the transmission nut, and the guide assembly includes a guide protrusion, which is fixedly arranged on the transmission nut, and a guide groove is opened on the inner wall surface of the sleeve along the axial direction of the sleeve, and the guide protrusion is located in the guide groove.

[0020] Furthermore, a fixing ring is provided between the first force feedback component and the second force feedback component, the fixing ring is sleeved on the input shaft, and the fixing ring is fixedly connected to the sleeve, the fixing ring is used to limit the initial positions of the first force feedback component and the second force feedback component, and the fixing ring is provided with an avoidance groove connected to the guide groove.

[0021] A vehicle comprises a vehicle body and the steer-by-wire mechanism as described above, wherein the steer-by-wire mechanism is arranged on the vehicle body.

[0022] Beneficial effects of the utility model:

[0023] The utility model provides a wire-controlled steering mechanism, wherein the first end of the input shaft can be connected to the steering wheel, the feedback motor is transmission-connected to the second end of the input shaft, the input shaft is located in a sleeve, a transmission assembly is arranged in the sleeve, the transmission assembly is transmission-connected to the input shaft, the transmission assembly can move along the axial direction of the input shaft as the input shaft rotates, the elastic feedback assembly is transmission-connected to the transmission assembly, and the transmission assembly can drive the elastic feedback assembly to generate elastic force. During the steering process, the driver turns the steering wheel, the steering wheel drives the input shaft to rotate, the input shaft drives the transmission assembly, and the transmission assembly drives the elastic feedback assembly to generate elastic force, thereby forming a steering feedback torque. The elastic feedback assembly and the feedback motor jointly form a feedback torque acting on the steering wheel. Even if the feedback motor fails or fails, it can still be ensured that the driver effectively obtains the feedback torque of the steering wheel during the steering process, thereby ensuring driving safety.

[0024] The utility model provides a vehicle, comprising a vehicle body and the above-mentioned wire-controlled steering mechanism, which can ensure that the driver effectively obtains the feedback torque of the steering wheel during the steering process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0026] Figure 1 It is a cross-sectional view of a wire-controlled steering mechanism of the utility model;

[0027] Figure 2 It is a cross-sectional view of an input shaft in a wire-controlled steering mechanism of the utility model;

[0028] Figure 3 It is a schematic diagram of a transmission nut in a wire-controlled steering mechanism of the utility model;

[0029] Figure 4 It is a schematic diagram of a sleeve in a wire-controlled steering mechanism of the utility model;

[0030] Figure 5 It is a schematic diagram of a fixed ring in a wire-controlled steering mechanism of the utility model;

[0031] Figure 6 It is a schematic diagram of a first spring seat in a wire-controlled steering mechanism of the utility model;

[0032] Figure 7 It is a schematic diagram of a first sliding block in a wire-controlled steering mechanism of the utility model.

[0033] In the figure:

[0034] 1. Input shaft; 11. Upper shaft; 111. External thread; 12. Lower shaft; 13. Bearing; 2. Sleeve; 21. Fixing ring; 211. Avoidance groove; 22. Flat key; 23. Screw; 24. Protective tube; 25. Guide groove; 3. Drive bracket; 4. Transmission assembly; 41. Transmission nut; 411. Guide protrusion; 5. First force feedback assembly; 51. First spring seat; 511. First mounting groove; 52. First compression elastic member; 53. First sliding block; 531. Second mounting groove; 6. Second force feedback assembly; 61. Second sliding block; 62. Second compression elastic member; 63. Second spring seat. DETAILED DESCRIPTION

[0035] Before any embodiments of the application are explained in detail, it is to be understood that the application is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the above drawings.

[0036] In this application, the terms "comprises", "includes", "has" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device that includes the element.

[0037] In the present application, the terms "connect", "combine", "couple", and "install" may refer to direct connection, combination, coupling, or installation, or indirect connection, combination, coupling, or installation. For example, direct connection refers to two parts or components being connected together without the need for an intermediate piece, and indirect connection refers to two parts or components being connected to at least one intermediate piece respectively, and the two parts or components being connected via the intermediate piece. In addition, "connect" and "couple" are not limited to physical or mechanical connections or couplings, and may include electrical connections or couplings.

[0038] In the present application, it will be understood by those of ordinary skill in the art that relative terms (e.g., "about," "approximately," "substantially," etc.) used in conjunction with quantities or conditions include the values ​​and have the meaning indicated by the context. For example, the relative terms include at least the degree of error associated with the measurement of a specific value, the tolerances caused by manufacturing, assembly, and use associated with a specific value, and the like. Such terms should also be considered to disclose a range defined by the absolute values ​​of the two endpoints. Relative terms may refer to plus or minus a certain percentage (e.g., 1%, 5%, 10% or more) of the indicated value. Numerical values ​​that do not use relative terms should also be disclosed as specific values ​​with tolerances. In addition, "substantially" may refer to plus or minus a certain degree (e.g., 1 degree, 5 degrees, 10 degrees or more) on the basis of the indicated angle when expressing a relative angular position relationship (e.g., substantially parallel, substantially perpendicular).

[0039] In this application, it will be understood by those skilled in the art that the function performed by a component can be performed by one component, multiple components, one part, or multiple parts. Similarly, the function performed by a part can also be performed by one part, one component, or a combination of multiple parts.

[0040] In the present application, the terms "upper", "lower", "left", "right", "front", "back" and other directional words are described based on the orientation and positional relationship shown in the accompanying drawings, and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. It should also be understood that directional words such as upper side, lower side, left side, right side, front side, back side, etc. not only represent the positive orientation, but can also be understood as the lateral orientation. For example, the bottom can include directly below, lower left, lower right, lower front, and lower back, etc.

[0041] When the driver is driving, in order to ensure that the driver can effectively obtain the feedback torque of the steering wheel during the steering process, such as Figure 1-Figure 7As shown, the utility model provides a wire-controlled steering mechanism. The wire-controlled steering mechanism comprises an input shaft 1, a feedback motor, a sleeve 2, a transmission component 4 and an elastic feedback component.

[0042] Among them, the first end of the input shaft 1 can be connected to the steering wheel. The feedback motor is connected to the second end of the input shaft 1 in a transmission connection. The sleeve 2 is sleeved on the input shaft 1, and the sleeve 2 is fixedly connected to the driving bracket 3 through a flat key 22 and a screw 23. The transmission component 4 is arranged in the sleeve 2, and the transmission component 4 is connected to the input shaft 1 in a transmission connection, and the transmission component 4 can move along the axial direction of the input shaft 1 as the input shaft 1 rotates. The elastic feedback component is arranged in the sleeve 2, and the transmission component 4 is connected to the elastic feedback component in a transmission connection, and the transmission component 4 can drive the elastic feedback component to generate elastic force.

[0043] During the steering process, the driver turns the steering wheel, the steering wheel drives the input shaft 1 to rotate, the input shaft 1 drives the transmission component 4, and the transmission component 4 drives the elastic feedback component to generate elastic force, thereby forming a steering feedback torque. The elastic feedback component and the feedback motor jointly form a feedback torque acting on the steering wheel. Even if the feedback motor fails or fails, it can still ensure that the driver effectively obtains the feedback torque of the steering wheel during the steering process to ensure driving safety.

[0044] Furthermore, the input shaft 1 has an external thread 111, and the transmission assembly 4 includes a transmission nut 41, which is threadedly connected to the input shaft 1, and the transmission nut 41 can move along the axial direction of the input shaft 1 as the input shaft 1 rotates. When the driver turns the steering wheel, the input shaft 1 rotates synchronously with the steering wheel, and the transmission nut 41 is threadedly matched with the input shaft 1, so that the transmission nut 41 moves along the axial direction of the input shaft 1. As the rotation direction of the input shaft 1 changes, the transmission nut 41 can move up and down. The transmission nut 41 cooperates with the elastic feedback assembly, so that the elastic feedback assembly generates elastic force to form a feedback torque. In other embodiments, the transmission assembly 4 can also adopt the form of cam push rod transmission, the cam is fixedly connected to the input shaft 1, and when the input shaft 1 rotates, the cam rotates synchronously, the cam drives the push rod to move, and the push rod cooperates with the elastic feedback assembly to realize torque feedback.

[0045] Furthermore, the elastic force feedback component includes a first force feedback component 5 and a second force feedback component 6. The first force feedback component 5 is located between the first end of the input shaft 1 and the transmission nut 41, and the second force feedback component 6 is located between the feedback motor and the transmission nut 41. When the input shaft 1 rotates in a first rotation direction, the first force feedback component 5 can be compressed to generate elastic force, and when the input shaft 1 rotates in a second rotation direction opposite to the first rotation direction, the second force feedback component 6 can be compressed to generate elastic force. By arranging the first force feedback component 5 and the second force feedback component 6, torque feedback can be provided when the steering wheel rotates in the first rotation direction or the second rotation direction.

[0046] Furthermore, the first force feedback assembly 5 includes a first spring seat 51, a first compression elastic member 52 and a first sliding block 53. The first spring seat 51 is fixedly arranged in the sleeve 2, the first sliding block 53 is slidably sleeved on the input shaft 1, the first compression elastic member 52 is located between the first spring seat 51 and the first sliding block 53, and the transmission nut 41 can move along the axial direction of the input shaft 1 to push the first sliding block 53 to move. In the process of turning the steering wheel along the first rotation direction, the transmission nut 41 moves upward to push the first sliding block 53 to move, and the first sliding block 53 compresses the first compression elastic member 52 to form a feedback torque, and as the steering wheel is turned at a greater angle, the feedback torque acting on the steering wheel is greater, so that it is convenient for the driver to perceive the steering angle. In this embodiment, the first compression elastic member 52 is a compression spring, and the first compression elastic member 52 is sleeved on the input shaft 1.

[0047] Furthermore, a first mounting groove 511 is provided on the first spring seat 51, a second mounting groove 531 is provided on the first sliding block 53, one end of the first compression elastic member 52 is located in the first mounting groove 511, and the other end of the first compression elastic member 52 is located in the second mounting groove 531. By providing the first mounting groove 511 and the second mounting groove 531, the position of the first compression elastic member 52 can be limited to prevent the first compression elastic member 52 from moving in the radial direction. Moreover, in the process of rotating the steering wheel along the first rotation direction, when the end face of the first mounting groove 511 contacts the end face of the second mounting groove 531, a mechanical limit is formed, and the steering wheel cannot continue to rotate, which plays a role of rotation stop.

[0048] Further, the second force feedback assembly 6 includes a second spring seat 63, a second compression elastic member 62 and a second sliding block 61, the second spring seat 63 is fixedly arranged in one end of the sleeve 2 close to the feedback motor, the second sliding block 61 is slidably sleeved on the input shaft 1, the second compression elastic member 62 is located between the second spring seat 63 and the second sliding block 61, and the transmission nut 41 can move along the axial direction of the input shaft 1 to push the second sliding block 61 to move. Specifically, the input shaft 1 includes an upper shaft 11 and a lower shaft 12 connected by a spline, the second force feedback assembly 6 is located at the lower shaft 12, and the lower shaft 12 is directly connected to the output shaft of the feedback motor. In the process of rotating the steering wheel in the second rotation direction, the transmission nut 41 moves downward to push the second sliding block 61 to move, and the second sliding block 61 compresses the second compression elastic member 62, thereby forming a feedback torque, and as the angle of rotation of the steering wheel increases, the feedback torque acting on the steering wheel increases, so that it is convenient for the driver to perceive the steering angle. In this embodiment, the second compression elastic member 62 is a compression spring, and the second compression elastic member 62 is sleeved on the input shaft 1.

[0049] Furthermore, a third mounting groove is provided on the second spring seat 63, a fourth mounting groove is provided on the second sliding block 61, one end of the second compression elastic member 62 is located in the third mounting groove, and the other end of the second compression elastic member 62 is located in the fourth mounting groove. By providing the third mounting groove and the fourth mounting groove, the position of the second compression elastic member 62 can be limited to prevent the second compression elastic member 62 from moving in the radial direction. Moreover, in the process of rotating the steering wheel along the second rotation direction, when the end face of the third mounting groove contacts the end face of the fourth mounting groove, a mechanical limit is formed, and the steering wheel cannot continue to rotate at this time, which plays the role of a rotation stop.

[0050] Furthermore, a guide assembly is provided between the sleeve 2 and the driving nut 41, and the guide assembly includes a guide protrusion 411, which is fixedly provided on the driving nut 41, and a guide groove 25 is provided on the inner wall surface of the sleeve 2 along the axial direction of the sleeve 2, and the guide protrusion 411 is located in the guide groove 25. Through the above arrangement, the movement of the driving nut 41 is guided by the cooperation between the guide groove 25 and the guide protrusion 411, so as to ensure that the driving nut 41 can only move along the axial direction of the input shaft 1, and eliminate the rotation of the driving nut 41.

[0051] Furthermore, a fixing ring 21 is provided between the first force feedback component 5 and the second force feedback component 6. The fixing ring 21 is sleeved on the input shaft 1 and fixedly connected to the sleeve 2. The fixing ring 21 is used to define the initial positions of the first force feedback component 5 and the second force feedback component 6. The fixing ring 21 is provided with an avoidance groove 211 connected to the guide groove 25. When the steering wheel is in the middle position, the first sliding block 53 and the second sliding block 61 are both in contact with the fixing ring 21. At this time, the first elastic compression member and the second elastic compression member are both in a compressed state, which can ensure that the steering wheel maintains a certain feedback torque.

[0052] Furthermore, a bearing 13 is provided between the input shaft 1 and the sleeve 2. By providing the bearing 13, it can be ensured that the input shaft 1 can rotate flexibly relative to the sleeve 2, and the bearing 13 can reduce the rotational friction.

[0053] Furthermore, a protective tube 24 is fixedly sleeved on the sleeve 2 , and the protective tube 24 cooperates with the driving bracket 3 , so that the driving bracket 3 plays a supporting role for the protective tube 24 .

[0054] This embodiment also provides a vehicle, including a vehicle body and the above-mentioned wire-controlled steering mechanism, wherein the wire-controlled steering mechanism is arranged on the vehicle body and can ensure that the driver can effectively obtain the feedback torque of the steering wheel during the steering process.

[0055] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A wire-controlled steering mechanism, characterized in that: include: An input shaft (1), a first end of the input shaft (1) being connectable to a steering wheel; A feedback motor, the feedback motor being drivingly connected to the second end of the input shaft (1); A sleeve (2), wherein the sleeve (2) is sleeved on the input shaft (1); a transmission assembly (4), the transmission assembly (4) being arranged in the sleeve (2), the transmission assembly (4) being in transmission connection with the input shaft (1), and the transmission assembly (4) being capable of moving along the axial direction of the input shaft (1) as the input shaft (1) rotates; An elastic force feedback component is arranged in the sleeve (2), and the transmission component (4) is in transmission connection with the elastic force feedback component, and the transmission component (4) can drive the elastic force feedback component to generate elastic force.

2. The steer-by-wire mechanism according to claim 1, characterized in that: The input shaft (1) has an external thread (111), and the transmission assembly (4) comprises a transmission nut (41), the transmission nut (41) is threadedly connected to the input shaft (1), and the transmission nut (41) can move along the axial direction of the input shaft (1) as the input shaft (1) rotates.

3. The steer-by-wire mechanism according to claim 2, characterized in that: The elastic force feedback component comprises a first force feedback component (5) and a second force feedback component (6), wherein the first force feedback component (5) is located between the first end of the input shaft (1) and the transmission nut (41), and the second force feedback component (6) is located between the feedback motor and the transmission nut (41); when the input shaft (1) rotates along a first rotation direction, the first force feedback component (5) can be compressed to generate an elastic force; when the input shaft (1) rotates along a second rotation direction opposite to the first rotation direction, the second force feedback component (6) can be compressed to generate an elastic force.

4. The steer-by-wire mechanism according to claim 3, characterized in that: The first force feedback component (5) comprises a first spring seat (51), a first compression elastic member (52) and a first sliding block (53); the first spring seat (51) is fixedly arranged in the sleeve (2); the first sliding block (53) is slidably sleeved on the input shaft (1); the first compression elastic member (52) is located between the first spring seat (51) and the first sliding block (53); and the transmission nut (41) can move along the axial direction of the input shaft (1) to push the first sliding block (53) to move.

5. The steer-by-wire mechanism according to claim 4, characterized in that: The first spring seat (51) is provided with a first mounting groove (511), the first sliding block (53) is provided with a second mounting groove (531), one end of the first compression elastic member (52) is located in the first mounting groove (511), and the other end of the first compression elastic member (52) is located in the second mounting groove (531).

6. The steer-by-wire mechanism according to claim 3, characterized in that: The second force feedback component (6) comprises a second spring seat (63), a second compression elastic member (62) and a second sliding block (61); the second spring seat (63) is fixedly arranged at one end of the sleeve (2) close to the feedback motor; the second sliding block (61) is slidably sleeved on the input shaft (1); the second compression elastic member (62) is located between the second spring seat (63) and the second sliding block (61); and the transmission nut (41) can move along the axial direction of the input shaft (1) to push the second sliding block (61) to move.

7. The steer-by-wire mechanism according to claim 6, characterized in that: A third mounting groove is provided on the second spring seat (63), a fourth mounting groove is provided on the second sliding block (61), one end of the second compression elastic member (62) is located in the third mounting groove, and the other end of the second compression elastic member (62) is located in the fourth mounting groove.

8. The steer-by-wire mechanism according to claim 3, characterized in that: A guide assembly is provided between the sleeve (2) and the transmission nut (41), the guide assembly comprising a guide protrusion (411), the guide protrusion (411) being fixedly provided on the transmission nut (41), a guide groove (25) being provided on the inner wall surface of the sleeve (2) along the axial direction of the sleeve (2), and the guide protrusion (411) being located in the guide groove (25).

9. The steer-by-wire mechanism according to claim 8, characterized in that: A fixing ring (21) is provided between the first force feedback component (5) and the second force feedback component (6); the fixing ring (21) is sleeved on the input shaft (1), and the fixing ring (21) is fixedly connected to the sleeve (2); the fixing ring (21) is used to define the initial positions of the first force feedback component (5) and the second force feedback component (6); and an avoidance groove (211) communicating with the guide groove (25) is provided on the fixing ring (21).

10. A vehicle, characterized in that It comprises a vehicle body and a wire-controlled steering mechanism as claimed in any one of claims 1 to 9, wherein the wire-controlled steering mechanism is arranged on the vehicle body.

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