Steer-by-wire system

Abstract

The utility model relates to the technical field of vehicle steering, in particular to a steer-by-wire system which comprises a sleeve with the first end connected with a vehicle body shell, a rotating rod arranged in the sleeve in a sleeved mode and a driving motor arranged at the second end of the sleeve. The first end of the rotating rod penetrates through the vehicle body shell and is connected with a steering system, and the second end is connected with a steering wheel of the vehicle through a driving motor; when the steering wheel rotates, the rotating rod can be driven by the driving motor to rotate. The driving motor is only arranged on the sleeve, so that the steering wheel is connected with the rotating rod through the driving motor, the power assisting effect of the driving motor can directly act on the steering wheel and the rotating rod at the same time, and the power assisting effect is better. A belt pulley or a ball screw and other structures are omitted, the mounting position and the connecting mode of the driving motor are optimized, the overall mechanical structure is simpler, the number of parts is smaller, and the size of the overall structure can be better reduced.

Description

Technical Field

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

[0002] Most vehicles currently use motors that use pulleys or ball screws to drive the steering wheel, and at the same time use the torque feedback of the TAS sensor to sense the road, which makes the mechanical structure complex, with relatively more parts and larger structural dimensions. Utility Model Content

[0003] In view of the above problems existing in the prior art, the present invention provides a steer-by-wire system.

[0004] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0005] A steer-by-wire system comprises a sleeve connected to a vehicle body shell at a first end, a rotating rod sleeved in the sleeve, and a drive motor disposed on a second end of the sleeve;

[0006] The first end of the rotating rod passes through the vehicle body shell and is connected to the steering system, and the second end is connected to the steering wheel of the vehicle through the driving motor; when the steering wheel rotates, the rotating rod can be driven to rotate by the driving motor.

[0007] Preferably, the drive motor includes a stator and a rotor; the stator is fixedly connected to the second end of the sleeve; the first end of the rotor is connected to the second end of the rotating rod, and the second end is connected to the steering wheel.

[0008] Preferably, the first end of the rotor is connected to the second end of the rotating rod through a coupling.

[0009] Preferably, the stator is fixedly mounted on the second end of the sleeve by bolts.

[0010] Preferably, a first connecting plate is provided on the stator; a second connecting plate is provided on the second end of the sleeve; and the first connecting plate and the second connecting plate are fixedly connected by the bolts.

[0011] Preferably, a controller is provided between the drive motor and the steering wheel.

[0012] Preferably, a through hole is provided on the controller; and the second end of the rotor is connected to the steering wheel through the through hole.

[0013] Preferably, the controller is fixedly mounted on the steering wheel or the drive motor.

[0014] Preferably, the gap between the circumferential side wall of the rotating rod and the inner side wall of the sleeve is 1 mm.

[0015] Preferably, the rotor and the rotating rod are coaxially arranged.

[0016] The utility model has at least the following beneficial effects:

[0017] 1. Compared with the conventional method of using a motor inside the vehicle body to indirectly drive the rotating rod to rotate using a pulley or ball screw, so that the rotating rod drives the steering wheel and steering system, in this application, only a driving motor is arranged on the sleeve, so that the steering wheel is connected to the rotating rod through the driving motor, so that the power assist effect of the driving motor can directly act on the steering wheel and the rotating rod at the same time, and its power assist effect is better.

[0018] 2. In this application, structures such as pulleys or ball screws are eliminated, and the installation position and connection method of the drive motor are optimized, making the overall mechanical structure simpler, with fewer parts, and the size of the overall structure can be reduced to a greater extent.

[0019] 3. Since the drive motor is directly set between the steering wheel and the turning rod, the torque transmission distance between the drive motor, the steering wheel and the turning rod is shorter, making the power assist of the drive motor more efficient and the driver's experience better. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A perspective view of a steer-by-wire system in some embodiments of the present application is shown;

[0021] Figure 2 A cross-sectional view of a steer-by-wire system in some embodiments of the present application is shown.

[0022] The parts indicated by the numbers in the accompanying drawings are as follows:

[0023] 100, sleeve; 110, second connecting plate; 200, rotating rod; 300, driving motor; 310, stator; 311, first connecting plate; 320, rotor; 400, steering wheel; 500, coupling; 600, bolt; 700, controller; 710, through hole. DETAILED DESCRIPTION

[0024] In order to further understand the content of the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments. It should be understood that the embodiments are merely for explanation of the present invention and are not intended to limit the present invention.

[0025] like Figure 1-2As shown, this embodiment provides a wire-controlled steering system, which includes a sleeve 100, a rotating rod 200, and a drive motor 300. The first end of the sleeve 100 is fixedly connected to the vehicle body shell (not shown in the figure), and the drive motor 300 is provided on the second end of the sleeve 100. The rotating rod 200 is disposed inside the sleeve 100, and the first end of the rotating rod 200 passes through the vehicle body shell and is connected to the vehicle's steering system (not shown in the figure). The rotation of the rotating rod 200 can drive the steering system to work, thereby achieving steering of the vehicle. The second end of the rotating rod 200 is connected to the vehicle's steering wheel 400 via the drive motor 300 provided on the sleeve 100. By turning the steering wheel 400, the driver can drive the rotating rod 200 to rotate via the drive motor 300, thereby causing the rotating rod 200 to drive the steering system to work.

[0026] Furthermore, when the driver turns the steering wheel 400 to drive the rotating rod 200 to rotate via the driving motor 300, the driving motor 300 can provide assistance for the steering wheel 400 to drive the rotating rod 200 to rotate, thereby achieving a labor-saving effect.

[0027] It should be noted that, compared with the conventional method of using a motor inside the vehicle body to indirectly drive the rotating rod 200 to rotate using a pulley or ball screw, so that the rotating rod 200 drives the steering wheel 400 and the steering system, in this embodiment, only the drive motor 300 is set on the sleeve 100, so that the steering wheel 400 is connected to the rotating rod 200 through the drive motor 300, so that the power assist effect of the drive motor 300 can directly act on the steering wheel 400 and the rotating rod 200 at the same time, and its power assist effect is better. In addition, in this embodiment, structures such as pulleys or ball screws are eliminated, and the installation position and connection method of the drive motor 300 are optimized, so that the overall mechanical structure is simpler, with fewer parts, and the size of the overall structure can be better reduced.

[0028] In particular, since the drive motor 300 is directly disposed between the steering wheel 400 and the rotating rod 200 , the torque transmission distance between the drive motor 300 and the steering wheel 400 and the rotating rod 200 is shorter, making the assist of the drive motor 300 more efficient and the driver's experience better.

[0029] In some embodiments, the drive motor 300 includes a stator 310 and a rotor 320. The stator 310 and the rotor 320 are coaxially arranged, and the stator 310 is sleeved outside the rotor 320. When the drive motor 300 is started, the rotor 320 rotates circumferentially within the stator 310. Furthermore, the stator 310 of the drive motor 300 is fixedly mounted on the second end of the sleeve 100, the first end of the rotor 320 of the drive motor 300 is connected to the second end of the rotating rod 200, and the second end of the rotor 320 of the drive motor 300 is connected to the steering wheel 400.

[0030] Because there is no corresponding connection structure between the stator 310 and the steering wheel 400, although the stator 310 is fixed to the vehicle body shell via the sleeve 100, the steering wheel 400 and the stator 310 can still rotate relative to each other. When the driver turns the steering wheel 400, the position of the stator 310 remains fixed on the sleeve 100, and the steering wheel 400 directly drives the rotor 320, causing the rotor 320 to rotate circumferentially within the stator 310, thereby driving the rotation of the rotating rod 200.

[0031] When the drive motor 300 is working, the stator 310 fixedly mounted on the sleeve 100 drives the rotor 320 to rotate, thereby allowing the driving force of the drive motor 300 to be directly transmitted to the steering wheel 400 and the rotating rod 200 connected thereto through the rotor 320, thereby providing assistance in the rotation of the steering wheel 400 and the steering wheel 400 driving the rotating rod 200 through the rotor 320, so that the driver can feel better when turning the steering wheel 400.

[0032] It can be understood that when the drive motor 300 is not working, the rotor 320 of the drive motor 300 can rotate freely relative to the stator 310, so that it will not affect the driving of the steering wheel 400 on the rotating rod 200. When the drive motor 300 is working, the stator 310 can drive the rotor 320 to directly assist the rotation of the steering wheel 400 and the rotating rod 200, which can better optimize the effect of the drive motor 300 in providing assistance to the steering wheel 400 and the rotating rod 200.

[0033] In some embodiments, the first end of the rotor 320 is connected to the second end of the rotating shaft 200 via a coupling 500 .

[0034] When the rotor 320 of the drive motor 300 rotates, the rotor 320 can directly drive the coupling 500 to rotate in the sleeve 100 along the circumferential direction of the sleeve 100, so that the coupling 500 can drive the rotating rod 200 to rotate, thereby realizing the driving of the rotating rod 200 by the rotor 320.

[0035] It can be understood that through the setting of the coupling 500, on the one hand, the connection between the rotor 320 and the rotating rod 200 can be achieved, and the transmission of motion and torque between the steering wheel 400 and the rotating rod 200 can be achieved; on the other hand, the installation deviation between the rotor 320 and the rotating rod 200 can be compensated, and the role of shock absorption, buffering and protection can be played, which is extremely important during the use of the vehicle and can improve the stability and safety of the connection between the rotor 320 and the rotating rod 200.

[0036] It is particularly important to note that since the rotating rod 200 is directly connected to the vehicle's steering system, if the rotating rod 200 is directly connected to the rotor 320 of the drive motor 300, the feedback force of the steering system on the rotating rod 200 will be directly transmitted to the rotor 320 through the rotating rod 200, which can easily cause instability of the rotor 320 and damage to the drive motor 300. In this embodiment, a coupling 500 is added between the rotor 320 and the rotating rod 200, so that the coupling 500 eliminates the feedback force of the steering system through its buffering and shock-absorbing effects, thereby better protecting the rotor 320 of the drive motor 300, thereby improving the stability and safety of the use of the drive motor 300.

[0037] In some embodiments, the stator 310 of the driving motor 300 is fixedly mounted on the second end of the sleeve 100 by means of bolts 600 .

[0038] By fixing the stator 310 on the second end of the sleeve 100 by means of bolts 600, the relative position of the stator 310 and the sleeve 100 can be better maintained stable, so that the stator 310 and the sleeve 100 are not prone to loosening during the use of the vehicle and the operation of the drive motor 300, thereby enabling the circumferential rotation of the rotor 320 to remain stable, thereby achieving the circumferential rotation of the steering wheel 400 and the rotating rod 200 connected to the rotor 320 to remain stable.

[0039] Of course, the stator 310 may also be fixedly mounted on the second end of the sleeve 100 by means of clamping, welding, etc., and this is not particularly limited.

[0040] In some embodiments, a first connecting plate 311 is provided on the circumferential sidewall of the stator 310 of the drive motor 300, and a second connecting plate 110 is provided on the circumferential outer sidewall of the second end of the sleeve 100. There are at least two first connecting plates 311, which are evenly spaced along the circumference of the stator 310. Similarly, there are at least two second connecting plates 110, which are also evenly spaced along the circumference of the sleeve 100. In this embodiment, the number of first connecting plates 311 and second connecting plates 110 is the same, both being two. When the drive motor 300 is placed on the second end of the sleeve 100, the two first connecting plates 311 correspond to the two second connecting plates 110. Bolts 600 are then used to connect the corresponding first connecting plates 311 and second connecting plates 110, thereby securing the first connecting plates 311 and second connecting plates 110 relative to each other, thereby achieving a fixed connection of the stator 310 to the second end of the sleeve 100.

[0041] In some embodiments, a controller 700 is provided between the drive motor 300 and the steering wheel 400 . The controller 700 can be used to control some functions of the vehicle, and can also be used to control the operation of the drive motor 300 so that the drive motor 300 provides assistance for the rotation of the steering wheel 400 and the rotating rod 200 .

[0042] Furthermore, the controller 700 is arranged between the drive motor 300 and the steering wheel 400, that is, the controller 700 is arranged on the back of the steering wheel 400 away from the driver, which can better achieve the hiding of the controller 700 and facilitate the aesthetic design of the steering wheel 400; and when the controller 700 is used to control the operation of the drive motor 300, since the controller 700 is closer to the drive motor 300, the controller 700 controls the drive motor 300 more efficiently and effectively.

[0043] In some embodiments, a through hole 710 is provided on the controller 700. When the controller 700 is installed between the drive motor 300 and the steering wheel 400, the second end of the rotor 320 of the drive motor 300 can be connected to the steering wheel 400 through the through hole 710, so that the steering wheel 400 can directly drive the rotor 320 to rotate.

[0044] Furthermore, the controller 700 in this embodiment is configured to control the operation of the drive motor 300. Specifically, the controller 700 is responsible for collecting information to control the drive motor 300 to output corresponding torque to provide assistance to the steering wheel 400 and the rotating rod 200. This means that the installation methods of the controller 700 can be divided into two types: the controller 700 is fixedly installed on the steering wheel 400, and the controller 700 is fixedly installed on the drive motor 300.

[0045] When the controller 700 is fixedly mounted on the steering wheel 400, there is no rigid connection between the controller 700 and the drive motor 300, so that the controller 700 and the drive motor 300 can rotate relative to each other. In this case, since the steering wheel 400, the rotor 320 and the rotating rod 200 all rotate synchronously, the controller 700 can be connected to the stator 310 of the drive motor 300. When the steering wheel 400 rotates, the steering wheel 400 will simultaneously drive the controller 700 to rotate. Since the position of the stator 310 is fixed, the controller 700 can detect the position of the stator 310. When the steering wheel 400 drives the controller 700 to rotate, the controller 700 can detect the stator 310, and then obtain information such as the angle at which the steering wheel 400 drives the controller 700 to rotate. Then, the controller 700 can control the output torque of the drive motor 300 based on this information, so that the rotor 320 can provide corresponding assistance for the rotation of the steering wheel 400 and the rotating rod 200.

[0046] When the controller 700 is fixedly mounted on the drive motor 300, specifically, the controller 700 is fixedly connected to the stator 310 of the drive motor 300, there is no rigid connection between the controller 700 and the steering wheel 400, so that the controller 700 and the steering wheel 400 can rotate relative to each other. In this case, since the steering wheel 400, the rotor 320 and the rotating rod 200 all rotate synchronously, the controller 700 can be connected to the steering wheel 400 or the rotor 320 or the rotating rod 200. When the steering wheel 400 rotates, the steering wheel 400 will simultaneously drive the steering wheel 400 to rotate. The rotor 320 and the rotating rod 200 rotate. Since the position of the stator 310 is fixed, the position of the controller 700 is also fixed, so that the controller 700 can detect the position of the steering wheel 400 or the rotor 320 or the rotating rod 200, and then obtain information such as the rotation angle of the steering wheel 400 or the rotor 320 or the rotating rod 200. Then, the controller 700 can control the output torque of the drive motor 300 based on this information, so that the rotor 320 can provide corresponding assistance for the rotation of the steering wheel 400 and the rotating rod 200.

[0047] In some embodiments, after the rotating rod 200 is connected to the steering system through the sleeve 100 , the gap between the circumferential side wall of the rotating rod 200 and the inner side wall of the sleeve 100 is 1 mm.

[0048] By setting the gap between the rotating rod 200 and the sleeve 100, the rotating rod 200 can maintain a certain distance from the sleeve 100, so that the rotating rod 200 will not scratch the inner wall of the sleeve 100 during rotation, avoiding interference.

[0049] Furthermore, the coupling 500 arranged between the rotor 320 and the rotating rod 200 is also in the sleeve 100 in the assembled state, and there is a certain distance between the coupling 500 and the inner wall of the sleeve 100, so that the coupling 500 will not scratch the inner wall of the sleeve 100 during rotation, thereby avoiding interference.

[0050] In some embodiments, the rotor 320 , the coupling 500 , the rotating rod 200 , and the sleeve 100 are all coaxially arranged so that the rotor 320 , the coupling 500 , or the rotating rod 200 will not deflect during use.

[0051] In short, the above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention patent.

Claims

1. A steer-by-wire system, characterized in that: It includes a sleeve whose first end is connected to the vehicle body shell, a rotating rod sleeved in the sleeve, and a driving motor arranged on the second end of the sleeve; The first end of the rotating rod passes through the vehicle body shell and is connected to the steering system, and the second end is connected to the steering wheel of the vehicle through the driving motor; when the steering wheel rotates, the rotating rod can be driven to rotate by the driving motor.

2. The steer-by-wire system according to claim 1, wherein: The driving motor includes a stator and a rotor; the stator is fixedly connected to the second end of the sleeve; the first end of the rotor is connected to the second end of the rotating rod, and the second end is connected to the steering wheel.

3. The steer-by-wire system according to claim 2, wherein: The first end of the rotor is connected to the second end of the rotating rod through a coupling.

4. The steer-by-wire system according to claim 2, wherein: The stator is fixedly mounted on the second end of the sleeve by means of bolts.

5. The steer-by-wire system according to claim 4, characterized in that: The stator is provided with a first connecting plate; the second end of the sleeve is provided with a second connecting plate; the first connecting plate and the second connecting plate are fixedly connected by the bolts.

6. The steer-by-wire system according to claim 2, wherein: A controller is provided between the driving motor and the steering wheel.

7. The steer-by-wire system according to claim 6, characterized in that: A through hole is provided on the controller; the second end of the rotor is connected to the steering wheel through the through hole.

8. The steer-by-wire system according to claim 6, wherein: The controller is fixedly mounted on the steering wheel or the driving motor.

9. The steer-by-wire system according to claim 1, wherein: The gap between the circumferential side wall of the rotating rod and the inner side wall of the sleeve is 1 mm.

10. The steer-by-wire system according to claim 2, wherein: The rotor and the rotating rod are coaxially arranged.

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