Electric steer-by-wire system and vehicle

Abstract

The utility model relates to the technical field of vehicles, in particular to an electric steer-by-wire system and a vehicle, the electric steer-by-wire system comprises a steering assembly and a redundant battery, the steering assembly comprises a supporting piece, a transverse pull rod, two steering knuckles and two electric cylinders, the two steering knuckles are arranged in the width direction of the vehicle at intervals, and the redundant battery is arranged in the supporting piece. The supporting piece is used for being arranged on a chassis of the vehicle and located between the two steering knuckles, fixing bases of the two electric cylinders are in pivot joint with the supporting piece, telescopic rods of the two electric cylinders are in pivot joint with steering arms of the two steering knuckles, the two ends of the transverse pull rod are in pivot joint with the two steering arms, and the two electric cylinders are used for being electrically connected with a power supply module of the vehicle. And the redundant battery can be electrically connected or disconnected with the electric cylinder. When the whole vehicle power supply module fails to supply power to the electric cylinder or the electric cylinder breaks down, the electric steer-by-wire system can still work normally, and therefore the stability of the vehicle and the safety of a driver are improved.

Description

Technical Field

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

[0002] The existing wide-body mining car steering system is a fully hydraulic steering system, which uses an electric hydraulic pump as the power source. The hydraulic pump supplies high-pressure oil to the fully hydraulic steering gear. When the steering gear rotates, it pushes the front axle steering cylinder to move, thereby realizing the steering of the vehicle.

[0003] The full hydraulic steering system needs to be equipped with a hydraulic oil tank, an electric hydraulic pump, a control valve, a steering gear, a steering cylinder and hydraulic pipeline accessories on the whole machine according to the performance requirements. The full hydraulic steering system has the problems of complex structure and large installation space.

[0004] To address these issues, existing technologies disclose electric steer-by-wire systems. A vehicle power supply module supplies power to an electric cylinder, which is then controlled by a controller to extend and retract, thereby driving the steering wheel. However, existing electric steer-by-wire systems lack necessary redundancy measures. If the vehicle power supply module fails to supply power to the electric cylinder or the electric cylinder malfunctions, the electric steer-by-wire system becomes inoperative, compromising vehicle stability and driver safety.

[0005] Therefore, an electric wire-controlled steering system is urgently needed to solve the above problems. Utility Model Content

[0006] The purpose of the present utility model is to provide an electric wire-controlled steering system to solve the problem in the related art that when the vehicle power supply module fails to supply power to the electric cylinder or the electric cylinder malfunctions, the electric wire-controlled steering system is in a failure state, which is not conducive to the stability of the vehicle and the safety of the driver.

[0007] In one aspect, the present invention provides an electric steer-by-wire system, comprising:

[0008] A steering assembly comprising a support member, a tie rod, two steering knuckles, and two electric cylinders, wherein the two steering knuckles are spaced apart in the vehicle width direction, the support member being disposed on the vehicle chassis and located between the two steering knuckles, the fixing seats of the two electric cylinders being pivotally connected to the support member, the telescopic rods of the two electric cylinders being pivotally connected to the steering arms of the two steering knuckles, the ends of the tie rod being pivotally connected to the two steering arms, and the two electric cylinders being electrically connected to the vehicle's power supply module;

[0009] A redundant battery is provided, wherein the redundant battery is capable of supplying power to the electric cylinder.

[0010] As a preferred technical solution for the electric wire-controlled steering system, it also includes an electronically controlled switch, which includes a first gear position and a second gear position. When the electronically controlled switch is in the first gear position, the redundant battery supplies power to the two electric cylinders respectively. When the electronically controlled switch is in the second gear position, the redundant battery stops supplying power to the two electric cylinders.

[0011] As a preferred technical solution of the electric steer-by-wire system, the electronically controlled switch further includes a third gear position, the electronically controlled switch is in the third gear position, and the power supply module of the vehicle is used to supply power to the redundant battery;

[0012] When the electronically controlled switch is in the second gear position, the power supply module of the vehicle stops supplying power to the redundant battery.

[0013] As a preferred technical solution of the electric wire-controlled steering system, it also includes a steering module, which includes a steering column and an angle sensor. The steering column is rotatably arranged on the chassis, and the angle sensor is used to monitor the rotation angle of the steering column.

[0014] As a preferred technical solution for the electric wire-controlled steering system, the steering module also includes a road feel simulator, which includes a housing, a first gear, and a second gear. The first gear and the second gear are respectively rotatably arranged on the housing. One end of the steering column is coaxially fixed to the first gear. The second gear is provided with a pin, and the housing is provided with a block. The block is located on the path of the pin's axial rotation around the second gear.

[0015] As a preferred technical solution for the electric steer-by-wire system, arc grooves are respectively provided on the two abutting walls of the clamping block and the bayonet pin;

[0016] The bayonet rotates around the axial direction of the second gear so that the bayonet can be inserted into the two circular arc grooves respectively, and the peripheral wall of the bayonet fits with the peripheral wall of the circular arc groove.

[0017] As a preferred technical solution of the electric wire-controlled steering system, the steering module further includes a bidirectional rotary damper, which is fixed to the housing, and a damping shaft of the bidirectional rotary damper is coaxially fixed to the second gear.

[0018] As a preferred technical solution of the electric steer-by-wire system, the angle sensor is fixed to the housing, and the angle sensor is used to monitor the rotation angle of the second gear.

[0019] As a preferred technical solution of the electric steer-by-wire system, the fixing seat of the electric cylinder and the pivot axis of the support member are arranged in the horizontal direction;

[0020] The telescopic rod of the electric cylinder and the corresponding pivot axis of the steering arm of the steering knuckle are arranged along the vertical direction.

[0021] On the other hand, the present invention provides a vehicle comprising a chassis and an electric wire-controlled steering system according to any of the above schemes, wherein the two steering knuckles are respectively rotatably arranged on both sides of the chassis along the vehicle width direction, and the support member is fixed to the chassis.

[0022] The beneficial effects of the utility model are:

[0023] The utility model provides an electric steer-by-wire system and a vehicle. The electric steer-by-wire system includes a steering assembly and a redundant battery. The steering assembly includes a support member, a tie rod, two steering knuckles, and two electric cylinders. The two steering knuckles are spaced apart along the vehicle width. The support member is mounted on the vehicle chassis and located between the two steering knuckles. The fixing bases of the two electric cylinders are pivotally connected to the support member. The telescopic rods of the two electric cylinders are pivotally connected to the steering arms of the two steering knuckles. The ends of the tie rod are pivotally connected to the two steering arms. The two electric cylinders are electrically connected to the vehicle's power supply module. The redundant battery is capable of supplying power to the electric cylinders. The two steering knuckles are rotatably mounted on opposite sides of the chassis along the vehicle width. The support member is fixed to the chassis. A controller drives the telescopic rods of the two electric cylinders to coordinately extend and retract, thereby causing the two steering knuckles to deflect in the same direction to achieve vehicle steering. If one of the electric cylinders fails, the other electric cylinder serves as a redundant function, thereby driving the pivotally connected steering knuckle to deflect. Because the ends of the tie rod are pivotally connected to the two steering knuckles, the two steering knuckles can also deflect synchronously to achieve vehicle steering. If the vehicle's power supply module fails to supply power to the two electric cylinders, the redundant battery can be electrically connected to the two electric cylinders to ensure normal operation of both cylinders. Therefore, even if the vehicle's power supply module fails to supply power to the electric cylinders or one of the electric cylinders fails, the electric steer-by-wire system can still operate normally, thereby improving vehicle stability and driver safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic structural diagram of an electric steer-by-wire system in an embodiment of the present utility model;

[0025] Figure 2 This is a connection diagram of the electric steer-by-wire system in an embodiment of the present utility model;

[0026] Figure 3 This is a structural diagram of the steering module in an embodiment of the present utility model.

[0027] In the picture:

[0028] 1. Controller;

[0029] 21. Support member; 22. Tie rod; 23. Steering knuckle; 231. Steering arm; 24. Electric cylinder;

[0030] 3. Redundant batteries;

[0031] 4. Steering module; 41. Steering column; 42. Angle sensor; 431. Housing; 432. First gear; 433. Second gear; 434. Bayonet pin; 435. Block; 436. Bidirectional rotary damper. DETAILED DESCRIPTION

[0032] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0033] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific position, be constructed and operated in a specific position, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0034] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] like Figures 1 to 3 As shown, this embodiment provides an electric steer-by-wire system, which includes a controller 1, a steering assembly, and a redundant battery 3. The steering assembly includes a support member 21, a tie rod 22, two steering knuckles 23, and two electric cylinders 24. The two steering knuckles 23 are spaced apart along the vehicle width. The support member 21 is mounted on the vehicle chassis and located between the two steering knuckles 23. The fixing bases of the two electric cylinders 24 are pivotally connected to the support member 21. The telescopic rods of the two electric cylinders 24 are pivotally connected to the steering arms 231 of the two steering knuckles 23. The ends of the tie rod 22 are pivotally connected to the two steering arms 231. The two electric cylinders 24 are electrically connected to the vehicle's power supply module and are communicatively connected to the controller 1. The redundant battery 3 can supply power to the electric cylinders 24. The two steering knuckles 23 are rotatably mounted on either side of the chassis along the vehicle width, and the support member 21 is fixed to the chassis. The controller 1 drives the telescopic rods of the two electric cylinders 24 to extend and retract in coordination, thereby causing the two steering knuckles 23 to deflect in the same direction to achieve vehicle steering. When one of the electric cylinders 24 fails, the other electric cylinder 24 acts as a redundant device, thereby driving the steering knuckle 23 pivoted thereto to deflect. Since the two ends of the tie rod 22 are pivoted to the two steering knuckles 23, the two steering knuckles 23 can also deflect synchronously to achieve vehicle steering. When the vehicle's power supply module fails to supply power to the two electric cylinders 24, the redundant battery 3 can be electrically connected to the two electric cylinders 24 to achieve normal operation of the two electric cylinders 24. Therefore, when the vehicle's power supply module fails to supply power to the electric cylinders 24 or the electric cylinders 24 fail, the electric wire steering system can still operate normally, thereby improving vehicle stability and driver safety.

[0037] Optionally, the electric steer-by-wire system further includes an electronically controlled switch having a first position and a second position. When the electronically controlled switch is in the first position, the redundant battery 3 supplies power to the two electric cylinders 24 respectively. When the electronically controlled switch is in the second position, the redundant battery 3 stops supplying power to the two electric cylinders 24. In this embodiment, when the vehicle's power supply module can normally supply power to the two electric cylinders 24, the electronically controlled switch is switched to the second position; when the vehicle's power supply module cannot normally supply power to the two electric cylinders 24, the electronically controlled switch is switched to the first position.

[0038] Optionally, the electronically controlled switch also includes a third position. When the electronically controlled switch is in the third position, the vehicle's power supply module supplies power to the redundant battery 3; when the electronically controlled switch is in the second position, the vehicle's power supply module stops supplying power to the redundant battery 3. In this embodiment, during actual vehicle use, although the redundant battery 3 is not operating, the prolonged storage of the redundant battery 3 will result in power loss. To avoid the problem of insufficient power in the redundant battery 3 and consequent inability to power the electric cylinder 24 in the event of a malfunction in the vehicle's power supply module, the electronically controlled switch is switched to the third position when the power loss of the redundant battery 3 exceeds a preset value a, thereby charging the redundant battery 3 through the vehicle's power supply module. When the electric steer-by-wire system is operating normally, the electronically controlled switch is in the second position.

[0039] Optionally, the controller 1 controls the electronically controlled switch to switch between the first, second, and third gears. In this embodiment, the controller 1 can automatically switch between the first, second, and third gears based on an emergency situation. In other embodiments, the electronically controlled switch can also be a manual switch, which the driver can manually switch based on an emergency situation. An emergency situation includes a power supply module failure.

[0040] Optionally, the electric steer-by-wire system further includes a steering module 4, which includes a steering column 41 and an angle sensor 42. The steering column 41 is rotatably mounted on the chassis, and the angle sensor 42 is used to monitor the rotation angle of the steering column 41. The angle sensor 42 is configured to communicate with the controller 1. In this embodiment, the steering module 4 also includes a steering wheel, with one end of the steering column 41 fixedly connected coaxially to the steering wheel. The driver rotates the steering wheel to thereby rotate the steering column 41. The angle sensor 42 monitors the rotation angle and direction of the steering column 41, and converts the signal into a steering execution command via the controller 1. The controller 1 then controls the electric cylinder 24 to perform corresponding actions, thereby actuating the steering knuckle 23.

[0041] Optionally, steering module 4 further includes a road feel simulator, which includes a housing 431, a first gear 432, and a second gear 433. The first gear 432 and the second gear 433 are rotatably mounted on the housing 431. One end of the steering column 41 is coaxially fixedly connected to the first gear 432. The second gear 433 is provided with a latch 434. The housing 431 is provided with a block 435, which is located in the path of the latch 434's axial rotation about the second gear 433. In this embodiment, the first gear 432 and the second gear 433 have different numbers of teeth, thereby achieving one rotation of the second gear 433 for every five rotations of the first gear 432. Since the block 435 is located on the path of the axial rotation of the pin 434 around the second gear 433, when the connection between the pin 434 and the block 435 passes through the rotating shaft of the second gear 433, when the rotating shaft rotates 2.5 circles in the forward direction, the pin 434 and one side wall of the block 435 abut against each other, and when the rotating shaft rotates 2.5 circles in the reverse direction, the pin 434 and the other side wall of the block 435 abut against each other.

[0042] Optionally, arcuate grooves are provided on the two abutting walls of the block 435 that abut against the latch pin 434, respectively. The latch pin 434 rotates about the axial direction of the second gear 433 so that the latch pin 434 can be inserted into the two arcuate grooves, with the circumferential walls of the latch pin 434 abutting against the circumferential walls of the arcuate grooves. In this embodiment, arcuate grooves are provided on the two abutting surfaces of the block 435, and the circumferential walls of the latch pin 434 abut against the circumferential walls of the arcuate grooves. This prevents stress concentration when the latch pin 434 abuts the block 435, thereby increasing the service life of the block 435 and the latch pin 434.

[0043] Optionally, the steering module 4 further includes a bidirectional rotary damper 436, which is fixedly mounted to the housing 431, with its damping shaft coaxially fixedly connected to the second gear 433. In this embodiment, this arrangement ensures that when the driver turns the steering wheel, they must overcome a certain damping force, simulating the damping force of the wheels during steering. Bidirectional rotary damper 436 is conventional and will not be described in detail here.

[0044] Optionally, an angle sensor 42 is fixed to the housing 431 and is used to monitor the rotation angle of the second gear 433. In this embodiment, the rotation shaft of the angle sensor 42 is fixedly connected coaxially with the second gear 433. Rotation of the second gear 433 in turn drives the rotation shaft of the angle sensor 42. The rotation direction and angle of the rotation shaft detected by the angle sensor 42 are the rotation direction and angle of the second gear 433.

[0045] Optionally, the pivot axis between the fixed base of the electric cylinder 24 and the support member 21 is arranged horizontally, while the pivot axis between the telescopic rod of the electric cylinder 24 and the corresponding steering arm 231 of the steering knuckle 23 is arranged vertically. In this embodiment, the steering knuckle 23 will swing vertically relative to the vehicle frame while the vehicle is in motion. Therefore, the pivot axis between the fixed base of the electric cylinder 24 and the support member 21 needs to be arranged horizontally. When the steering knuckle 23 swings in the horizontal plane, the angle between the swing arm of the steering knuckle 23 and the telescopic rod of the electric cylinder 24 will change. Therefore, the pivot axis between the telescopic rod of the electric cylinder 24 and the corresponding steering arm 231 of the steering knuckle 23 needs to be arranged vertically.

[0046] This embodiment also provides a vehicle, including a chassis and the electric wire-controlled steering system in the above solution, two steering knuckles 23 are respectively rotatably arranged on both sides of the chassis along the vehicle width direction, and the support member 21 is fixed to the chassis.

[0047] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. Electric steer-by-wire system, characterized in that: include: A steering assembly comprises a support member (21), a tie rod (22), two steering knuckles (23) and two electric cylinders (24), wherein the two steering knuckles (23) are spaced apart in a vehicle width direction, the support member (21) is used to be arranged on a chassis of a vehicle and is located between the two steering knuckles (23), the fixing seats of the two electric cylinders (24) are respectively pivotally connected to the support member (21), the telescopic rods of the two electric cylinders (24) are respectively pivotally connected to the steering arms (231) of the two steering knuckles (23), the two ends of the tie rod (22) are respectively pivotally connected to the two steering arms (231), and the two electric cylinders (24) are used to be electrically connected to a power supply module of the vehicle; A redundant battery (3), wherein the redundant battery (3) is capable of supplying power to the electric cylinder (24).

2. The electric steer-by-wire system according to claim 1, characterized in that: The electric control switch further comprises a first gear position and a second gear position. When the electric control switch is in the first gear position, the redundant battery (3) supplies power to the two electric cylinders (24) respectively. When the electric control switch is in the second gear position, the redundant battery (3) stops supplying power to the two electric cylinders (24).

3. The electric steer-by-wire system according to claim 2, characterized in that: The electric control switch further comprises a third gear position, and when the electric control switch is in the third gear position, the power supply module of the vehicle is used to supply power to the redundant battery (3); When the electric control switch is in the second gear position, the power supply module of the vehicle stops supplying power to the redundant battery (3).

4. The electric steer-by-wire system according to claim 1, characterized in that: The invention also includes a steering module (4), wherein the steering module (4) includes a steering column (41) and an angle sensor (42). The steering column (41) is rotatably arranged on the chassis, and the angle sensor (42) is used to monitor the rotation angle of the steering column (41).

5. The electric steer-by-wire system according to claim 4, characterized in that: The steering module (4) further includes a road feel simulator, which includes a housing (431), a first gear (432) and a second gear (433). The first gear (432) and the second gear (433) are respectively rotatably arranged on the housing (431). One end of the steering column (41) is coaxially fixedly connected to the first gear (432). The second gear (433) is provided with a bayonet (434). The housing (431) is provided with a block (435). The block (435) is located on a path where the bayonet (434) rotates around the axial direction of the second gear (433).

6. The electric steer-by-wire system according to claim 5, characterized in that: Arc grooves are respectively provided on the two abutting walls of the clamping block (435) and the clamping pin (434); The bayonet (434) rotates around the axial direction of the second gear (433) so that the bayonet (434) can be respectively inserted into the two circular arc grooves, and the peripheral wall of the bayonet (434) fits with the peripheral wall of the circular arc groove.

7. The electric steer-by-wire system according to claim 5, characterized in that: The steering module (4) further comprises a bidirectional rotation damper (436), the bidirectional rotation damper (436) being fixed to the housing (431), and the damping shaft of the bidirectional rotation damper (436) being coaxially fixed to the second gear (433).

8. The electric steer-by-wire system according to claim 5, characterized in that: The angle sensor (42) is fixed to the housing (431), and the angle sensor (42) is used to monitor the rotation angle of the second gear (433).

9. The electric steer-by-wire system according to any one of claims 1 to 8, characterized in that: The fixing seat of the electric cylinder (24) and the pivot axis of the support member (21) are arranged in a horizontal direction; The telescopic rod of the electric cylinder (24) and the pivot axis of the corresponding steering arm (231) of the steering knuckle (23) are arranged in a vertical direction.

10. A vehicle, characterized in that The invention comprises a chassis and an electric wire-controlled steering system according to any one of claims 1 to 9, wherein the two steering knuckles (23) are respectively rotatably arranged on both sides of the chassis along the vehicle width direction, and the support member (21) is fixed to the chassis.

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