CN112477979A - Electric power-assisted steering mechanism - Google Patents
Electric power-assisted steering mechanism Download PDFInfo
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- CN112477979A CN112477979A CN202011529592.8A CN202011529592A CN112477979A CN 112477979 A CN112477979 A CN 112477979A CN 202011529592 A CN202011529592 A CN 202011529592A CN 112477979 A CN112477979 A CN 112477979A
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- electric power
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- power steering
- wheel
- torque
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D5/00—Power-assisted or power-driven steering
- B62D5/04—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear
- B62D5/0457—Power-assisted or power-driven steering electrical, e.g. using an electric servo-motor connected to, or forming part of, the steering gear characterised by control features of the drive means as such
Abstract
The invention discloses an electric power steering mechanism, which comprises an operating mechanism for operating steering and a steering mechanism connected with wheels, wherein the operating mechanism is connected with the steering mechanism through an electric power steering gear; the electric power steering device further comprises a controller, a vehicle speed sensor for detecting the rotating speed of the wheels and a torque sensor for detecting external force torque applied to the operating mechanism, wherein the controller is in signal connection with the electric power steering device, the vehicle speed sensor and the torque sensor; when the external force torque is larger than A, the electric power steering gear provides power-assisted torque to the steering mechanism, and the power-assisted torque is inversely related to the rotating speed of the wheels. The electric power steering gear is arranged between the operating mechanism and the steering mechanism, does not occupy the space of a cab, and is convenient to install and arrange. And the power-assisted torque provided by the electric power-assisted steering gear is inversely related to the rotating speed of the wheels, namely the power-assisted value provided by the electric power-assisted steering gear is reduced along with the increase of the vehicle speed, so that the convenience in operation is ensured, and the safety in operation is ensured.
Description
Technical Field
The invention relates to the technical field of steering mechanisms, in particular to an electric power steering mechanism.
Background
The steering used in the existing vehicle includes hydraulic power steering, column type electric power steering, and the like. Problems with hydraulic power steering are: the cost is high, the traditional hydraulic power steering is applied to a pure electric vehicle, and the cost exceeds that of electric power steering by about thousand yuan because no engine drives a hydraulic pump and an additional motor and a controller are needed; the assembly is complicated, and when the hydraulic power-assisted steering mechanism is mounted and rotated, the steering power-assisted function can be realized only by a plurality of parts such as an oil pipe, an oil can, an oil pump, a motor and a controller; the hydraulic oil is not environment-friendly, and if the hydraulic oil leaks, the environment is polluted; the energy consumption is high, and hydraulic power-assisted steering needs the engine to drive the motor, can increase engine power consumption. The hydraulic oil is influenced by temperature, and the steering is influenced by overhigh or overlow temperature. The problems of the tubular column type electric power steering are as follows: the arrangement is difficult, the column type electric power steering is realized, and the power-assisted motor is integrated on the steering column and occupies the space in the cab during arrangement.
Therefore, how to provide an electric power steering mechanism that is convenient to arrange, easy to operate, safe and reliable is a problem to be solved by those skilled in the art.
Disclosure of Invention
In view of the above, the present invention provides an electric power steering mechanism which is easy to arrange, easy to operate, and safe and reliable.
In order to achieve the above purpose, the invention provides the following technical scheme:
an electric power steering mechanism comprises an operating mechanism for operating steering and a steering mechanism connected to wheels, wherein the operating mechanism is connected with the steering mechanism through an electric power steering;
the electric power steering device further comprises a controller, a vehicle speed sensor and a torque sensor, wherein the vehicle speed sensor is used for detecting the rotating speed of a vehicle wheel, the torque sensor is used for detecting external force torque applied to the operating mechanism, and the controller is in signal connection with the electric power steering device, the vehicle speed sensor and the torque sensor;
when the external force torque is larger than A, the electric power steering gear provides power-assisted torque to the steering mechanism, and the power-assisted torque is inversely related to the rotating speed of the wheels.
Preferably, the controller controls the power-assisted torque by controlling an input current of the electric power steering, and when the rotation speed of the wheels is 0, the input current is 35A; when the rotating speed of the wheel is more than 25km/h, the input current is 10A; and when the vehicle speed is 0-25km/h, the input current is uniformly decreased along with the increase of the rotating speed of the wheels.
Preferably, operating device includes the steering wheel, the steering wheel is fixed in on the steering column through the spline, the steering column passes through the axle sleeve and rotates with the bolt to be connected in the support, there is the integral key shaft electric power steering gear's input through splined connection, the integral key shaft with the steering column passes through the universal joint transmission and is connected.
Preferably, the output end of the electric power steering gear is connected with a rocker arm, the wheels are connected to a steering axle, and the rocker arm is connected to the steering axle through a drag link.
Preferably, the steer axle includes the axle body and locates the left knuckle and the right knuckle of axle body, the wheel includes left wheel and right wheel, left wheel connect in left knuckle, right wheel connect in right knuckle, just left knuckle with right knuckle passes through the drag link and connects, the drag link connect in left knuckle or right knuckle.
Preferably, the drag link pass through the bulb subassembly connect in left knuckle, the bulb subassembly includes that one end is equipped with the bulb body of sphere recess and one end is equipped with the bellied bulb axle of sphere, the sphere is protruding rotate connect in the sphere recess, the other end of bulb body connect in the drag link.
Preferably, the drag link is the circular steel tube, the both ends of circular steel tube all are equipped with the internal thread, just the both ends of circular steel tube all have axial recess, the ball head body is kept away from the one end of sphere recess be equipped with interior screw-thread fit's external screw thread, just the ball head body with the circular steel tube passes through round nut and lock washer fixed connection.
Preferably, a dust cover is arranged at the joint of the ball head body and the ball head shaft.
Preferably, the steering angle of the vehicle wheel is detected by an angle sensor, the angle sensor is in signal connection with the controller, and when the steering angle is larger than B and the external force torque is smaller than C, the electric power steering drives the vehicle wheel to return to the right.
Preferably, the controller controls the aligning torque by controlling an input current of the electric power steering, and the input current is 4A when the rotating speed of the wheel is 0-20 km/h; when the wheel rotating speed is 20-80km/h, the input current is uniformly decreased along with the increase of the wheel rotating speed; when the rotating speed of the wheel is more than 80km/h, the input current is 2.5A.
According to the electric power steering mechanism provided by the invention, the electric power steering gear is arranged between the operating mechanism and the steering mechanism, so that the space of a cab is not occupied, and the electric power steering mechanism is convenient to install and arrange. The power-assisted torque provided by the electric power-assisted steering gear is inversely related to the rotating speed of the wheels, namely the power-assisted value provided by the electric power-assisted steering gear is reduced along with the increase of the vehicle speed, the steering resistance torque of the wheels is large at low speed, and the power-assisted torque provided by the electric power-assisted steering gear is large, so that the steering is light. At high speed, the steering resistance moment of the wheels is small, the direction needs to be stable for avoiding the vehicle from drifting, and the power-assisted moment provided by the electric power-assisted steering device is small. The operation is convenient and convenient, and the operation safety is ensured. And the operating mechanism is connected with the steering mechanism through the electric power steering gear, when the electric power steering gear fails, the mechanical structure can still play a role, the steering is not out of control, and the operation safety is further ensured. In addition, the electric power steering gear only works when steering, and the electric energy loss is very little.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic view of an embodiment of an electric power steering mechanism provided by the present invention;
FIG. 2 is a schematic view of an operating mechanism;
FIG. 3 is a schematic view of the operating mechanism coupled to the electric power steering gear;
FIG. 4 is a schematic view of the connection of a circular steel tube and a ball head assembly;
FIG. 5 is a schematic view of a round steel pipe;
FIG. 6 is a schematic end view of a round steel pipe;
fig. 7 is a schematic view of a ball head assembly.
The steering wheel-free steering device comprises a steering wheel 1, a steering column 2, a support 3, a universal joint 4, a spline shaft 5, an electric power steering gear 6, a rocker arm 7, a drag link 8, a left steering knuckle 9, a controller 10, a tie rod 11, a bridge body 12, a right steering knuckle 13, a large washer 14, a locking bolt 15, a handle 16, a screw 17, a washer 18, a bolt 19, a shaft sleeve 20, a vehicle speed sensor 21, a torque sensor 22, an angle sensor 23, a round steel pipe 24, a stop washer 25, an axial groove 251, a round nut 26, a ball head body 27, a ball head shaft 28 and a dust cover 29.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The core of the invention is to provide the electric power steering mechanism which is convenient to arrange, light and convenient to operate, safe and reliable.
Referring to fig. 1 to 7, fig. 1 is a schematic view of an embodiment of an electric power steering mechanism according to the present invention; FIG. 2 is a schematic view of an operating mechanism; FIG. 3 is a schematic view of the operating mechanism coupled to the electric power steering gear; FIG. 4 is a schematic view of the connection of a circular steel tube and a ball head assembly; FIG. 5 is a schematic view of a round steel pipe; FIG. 6 is a schematic end view of a round steel pipe; fig. 7 is a schematic view of a ball head assembly.
The invention provides an electric power steering mechanism, which comprises an operating mechanism for operating steering and a steering mechanism connected with wheels, wherein the operating mechanism is connected with the steering mechanism through an electric power steering gear 6;
the electric power steering device further comprises a controller 10, a vehicle speed sensor 21 for detecting the rotating speed of the wheels, and a torque sensor 22 for detecting external force torque applied to the operating mechanism, wherein the controller 10 is in signal connection with the electric power steering device 6, the vehicle speed sensor 21 and the torque sensor 22;
when the external force torque is larger than A, the electric power steering device 6 provides power-assisted torque to the steering mechanism, and the power-assisted torque is inversely related to the rotating speed of the wheels.
The operating mechanism is used for operating the steering of the wheels, and is typically a steering wheel 1 or the like provided in a cab, and the steering mechanism includes a steering axle or the like connected to the wheels. The operating mechanism is connected to the steering axle through the electric power steering gear 6, and when a driver operates the operating mechanism to steer, the electric power steering gear 6 provides steering torque to the steering mechanism so as to facilitate steering.
It should be noted that the assist torque provided by the electric power steering 6 is proportional to the input current thereof, and the larger the input current is, the larger the assist torque provided by the electric power steering 6 is, whereas the smaller the input current is, the smaller the assist torque provided by the electric power steering 6 is.
The torque sensor 22 is used to detect the external force torque applied to the operating mechanism, i.e., the torque applied to the steering wheel 1 by the driver. The speed sensor is used for detecting the rotating speed of the wheel, namely the speed sensor is used for detecting the running speed of the vehicle so as to improve different boosting torques according to different vehicle speeds. Among them, the controller 10 may be the ECU controller 10.
According to the electric power steering mechanism provided by the invention, the electric power steering device 6 is arranged between the operating mechanism and the steering mechanism, so that the space of a cab is not occupied, and the electric power steering mechanism is convenient to install and arrange. The power-assisted torque provided by the electric power-assisted steering device 6 is inversely related to the rotating speed of the wheels, namely the power-assisted value provided by the electric power-assisted steering device 6 is reduced along with the increase of the vehicle speed, the steering resistance torque of the wheels is large at low speed, and the power-assisted torque provided by the electric power-assisted steering device 6 is large, so that the steering is light. At high speed, the steering resistance moment of the wheels is small, the direction needs to be stable for avoiding the vehicle from drifting, and the power-assisted moment provided by the electric power-assisted steering device 6 is small. The operation is convenient and convenient, and the operation safety is ensured. And operating device passes through electric power assisted steering ware 6 with steering mechanism and is connected, and when electric power assisted steering ware 6 became invalid, mechanical structure still can play a role, can not let to turn to out of control, further guarantees the security of operation. In addition, the electric power steering 6 operates only during steering, and the electric power loss is extremely small.
On the basis of the above-described embodiment, in consideration of the setting of the specific relationship between the assist torque and the wheel rotation speed, it is preferable that the controller 10 controls the assist torque by controlling the input current of the electric power steering 6, which is 35A when the wheel rotation speed is 0; when the rotating speed of the wheel is more than 25km/h, the input current is 10A; and when the vehicle speed is 0-25km/h, the input current is uniformly decreased along with the increase of the wheel rotating speed. Of course, other relationships may be adjusted as desired.
On the basis of the above-mentioned embodiment, in consideration of the specific arrangement of the operating mechanism, as a preferable mode, the operating mechanism includes the steering wheel 1, the steering wheel 1 is fixed to the steering column 2 through splines, the steering column 2 is rotatably connected to the bracket 3 through the shaft sleeve 20 and the bolt 19, the input end of the electric power steering 6 is connected to the spline shaft 5 through the splines, and the spline shaft 5 is in transmission connection with the steering column 2 through the universal joint 4.
Specifically, the steering mechanism comprises a steering wheel 1, and the steering wheel 1 is fixed on a steering column 2 through splines. The steering column 2 is fixed to the bracket 3 by means of a bushing 20 and a bolt 19, and the steering column 2 can be rotated back and forth through a hole in the bracket 3. One end of the lock bolt 1915 is screwed into a threaded hole in the steering column 2 through the guide groove of the large washer 1814 and the bracket 3, and the steering column 2 is locked against further rotation back and forth by tightening the lock bolt 1915.
The outer side of the other end of the locking bolt 1915 is provided with a straight spline, and the handle 16 cuts into the locking bolt 1915 through the spline, so that the locking bolt 1915 can be driven to rotate. A screw 17 is threaded through washer 18 into a threaded hole in one end of lock bolt 1915 to lock handle 16 to lock bolt 1915.
The relative position of the steering column 2 and the electric power steering device 6 is far away, the steering column 2 needs to penetrate through a frame and a cab, in order to shorten the length of the universal joint 4 and enable the universal joint to be convenient to install and arrange, a section of spline shaft 5 is connected to the electric power steering device 6 through a spline, one end of the universal joint 4 is connected with the spline shaft 5, and the other end of the universal joint is connected with the steering column 2. The cost is reduced, the number of parts is reduced, the light weight of the whole vehicle is realized, and the whole machine integration of the electric power steering gear is realized.
On the basis of the above-described embodiment, it is preferable that the output end of the electric power steering 6 is connected with a rocker arm 7, the wheels are connected to the steer axle, and the rocker arm 7 is connected to the steer axle through a drag link 8.
In this embodiment, the output end of the electric power steering 6 is connected with the rocker arm 7, one end of the drag link 8 is connected with the rocker arm 7, the other end of the drag link is connected with the steering knuckle of the steering axle, and the drag link 8 transmits the force transmitted from the steering wheel 1 to the electric power steering 6 to the steering axle, so that the vehicle steering is realized.
On the basis of the above embodiment, it is preferable that the steering axle includes an axle body 12, and a left knuckle 9 and a right knuckle 13 provided on the axle body 12, the wheels include a left wheel and a right wheel, the left wheel is connected to the left knuckle 9, the right wheel is connected to the right knuckle 13, the left knuckle 9 and the right knuckle 13 are connected by a tie rod 11, and the tie rod 8 is connected to the left knuckle 9 or the right knuckle 13.
In this embodiment, the steering axle is composed of a left steering knuckle 9, a tie rod 11, an axle body 12 and a right steering knuckle 13, specifically, the tie rod 8 is connected to the left steering knuckle 9, the left steering knuckle 9 is rotated by the force of the tie rod 8, so as to drive the tie rod 11 to move, and the tie rod 11 drives the right steering knuckle 13 to rotate, so as to realize steering. This steering axle is mechanical structure, compares the steering axle that promotes with hydraulic cylinder, turns to more accurately, the phenomenon of off tracking can not appear. And a synchronous steering axle is adopted, so that the steering deviation is small and the steering is accurate.
On the basis of the above embodiment, preferably, the drag link 8 is connected to the left knuckle 9 through a ball head assembly, the ball head assembly includes a ball head 27 having a spherical recess at one end thereof and a ball head shaft 28 having a spherical protrusion at one end thereof, the spherical protrusion is rotatably connected to the spherical recess, and the other end of the ball head 27 is connected to the drag link 8.
On the basis of above-mentioned embodiment, as an optimization, drag link 8 is circular steel tube 24, and circular steel tube 24's both ends all are equipped with the internal thread, and circular steel tube 24's both ends all have axial recess 251, and the one end that spherical recess was kept away from to bulb body 27 is equipped with the external screw thread with internal thread fit, and bulb body 27 and circular steel tube 24 pass through round nut 26 and lock washer 25 fixed connection.
The arrangement of the electric power steering 6 and the steering axle is required according to the structure of the vehicle, and the drag link 8 is used as a connecting rod for connecting the two, and the movement is spatial. Similarly, the tie rod 11 serves as a link connecting the left knuckle 9 and the right knuckle 13, and its movement is also spatial. Both ends of the drag link 8 and the tie rod 11 need to be freely rotated.
Specifically, the drag link 8 and the tie rod 11 are different in shape except the connecting rod, and other structures are the same, taking the drag link 8 as an example, the drag link 8 can be a round steel tube 24, two ends of the drag link 8 are provided with internal threads, and each end is provided with a groove. Two ends of the straight pull rod 8 are respectively connected with a ball head assembly, and the ball head assembly comprises a ball head body 27 and a ball head shaft 28. The interior of the ball head body 27 is a spherical surface, and one end of the ball head shaft 28 is also a spherical surface, and the two can rotate freely after being matched. The other end of the ball head shaft 28 is a conical surface which can be matched with the conical surfaces on the rocker arm 7, the left steering knuckle 9 and the like. The other end of the ball head body 27 is a screw rod which can be fixedly connected with the internal thread of the straight pull rod 8.
The ball head body 27 and the round steel tube 24 are fixedly connected with the stop washer 25 through the round nut 26. One end of the ball head body 27 is screwed with the round nut 26, sleeved with the stop washer 18 and then screwed with one end of the round steel tube 24, after the pull rod adjustment is completed, the round nut 26 needs to be screwed tightly, and the stop washer 18 of the round nut 26 is knocked into the groove of the round nut 26 and the axial groove 251 of the round steel tube 24 at the same time, so that the anti-loosening effect is achieved. The locking form mechanism is compact, saves space and is beneficial to arranging the steering mechanism in a narrow space.
In addition to the above embodiments, it is preferable that a dust cover 29 is provided at the joint of the ball head body 27 and the ball head shaft 28. To ensure the reliability of the rotational connection of the ball head body 27 and the ball head shaft 28.
On the basis of the above-mentioned embodiment, it is preferable that an angle sensor 23 for detecting a steering angle of the wheel is further included, the angle sensor 23 is in signal connection with the controller 10, and the electric power steering 6 drives the wheel to be turned right when the steering angle is larger than B and the external force torque is smaller than C. Specifically, B is 5 ° and C is 1N · m.
On the basis of the above embodiment, it is preferable that the controller 10 controls the aligning torque by controlling the input current of the electric power steering 6 to be 4A when the rotation speed of the wheels is 0 to 20 km/h; when the rotating speed of the wheel is 20-80km/h, the input current is uniformly decreased along with the increase of the rotating speed of the wheel; when the rotating speed of the wheel is more than 80km/h, the input current is 2.5A.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The electric power steering mechanism provided by the present invention is described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. An electric power steering mechanism, characterized by comprising an operating mechanism for operating steering and a steering mechanism connected to wheels, wherein the operating mechanism is connected with the steering mechanism through an electric power steering (6);
the electric power steering system further comprises a controller (10), a vehicle speed sensor (21) for detecting the rotating speed of a vehicle wheel and a torque sensor (22) for detecting external force torque applied to the operating mechanism, wherein the controller (10) is in signal connection with the electric power steering gear (6), the vehicle speed sensor (21) and the torque sensor (22);
when the external force torque is larger than A, the electric power steering gear (6) provides power-assisted torque to the steering mechanism, and the power-assisted torque is inversely related to the rotating speed of the wheels.
2. The electric power steering mechanism according to claim 1, wherein the controller (10) controls the assist torque by controlling an input current of the electric power steering (6), the input current being 35A when the wheel speed is 0; when the rotating speed of the wheel is more than 25km/h, the input current is 10A; and when the vehicle speed is 0-25km/h, the input current is uniformly decreased along with the increase of the wheel rotating speed.
3. The electric power steering mechanism according to claim 1, wherein the operating mechanism comprises a steering wheel (1), the steering wheel (1) is fixed on a steering column (2) through a spline, the steering column (2) is rotatably connected to the bracket (3) through a shaft sleeve (20) and a bolt (19), the input end of the electric power steering (6) is connected with a spline shaft (5) through a spline, and the spline shaft (5) is in transmission connection with the steering column (2) through a universal joint (4).
4. The electric power steering according to claim 3, characterized in that a rocker arm (7) is connected to the output of the electric power steering (6), the wheels being connected to a steering axle, the rocker arm (7) being connected to the steering axle via a drag link (8).
5. The electric power steering mechanism according to claim 4, wherein the steering axle comprises an axle body (12), and a left knuckle (9) and a right knuckle (13) provided on the axle body (12), the wheels comprise a left wheel and a right wheel, the left wheel is connected to the left knuckle (9), the right wheel is connected to the right knuckle (13), the left knuckle (9) and the right knuckle (13) are connected through a tie rod (11), and the tie rod (8) is connected to the left knuckle (9) or the right knuckle (13).
6. The electric power steering mechanism according to claim 5, wherein the straight pull rod (8) is connected to the left steering knuckle (9) by a ball head assembly, the ball head assembly comprising a ball head body (27) having a spherical recess at one end thereof and a ball head shaft (28) having a spherical protrusion at one end thereof, the spherical protrusion being rotatably connected to the spherical recess, the other end of the ball head body (27) being connected to the straight pull rod (8).
7. The electric power steering mechanism according to claim 6, wherein the drag link (8) is a circular steel tube (24), both ends of the circular steel tube (24) are provided with internal threads, both ends of the circular steel tube (24) are provided with axial grooves (251), one end of the ball head body (27) away from the spherical groove is provided with external threads matched with the internal threads, and the ball head body (27) and the circular steel tube (24) are fixedly connected with a stop washer (25) through a round nut (26).
8. The electric power steering mechanism according to claim 7, wherein a dust cover (29) is provided at a junction of the ball head body (27) and the ball head shaft (28).
9. The electric power steering according to any one of claims 1 to 8, further comprising an angle sensor (23) for detecting a steering angle of the wheel, the angle sensor (23) being in signal connection with the controller (10), wherein the electric power steering (6) provides a aligning torque to the steering mechanism to drive the wheel to align when the steering angle is greater than B and the external force torque is less than C.
10. The electric power steering mechanism according to claim 9, characterized in that the controller (10) controls the aligning torque by controlling an input current of the electric power steering (6), the input current being 4A when the wheel speed is 0-20 km/h; when the wheel rotating speed is 20-80km/h, the input current is uniformly decreased along with the increase of the wheel rotating speed; when the rotating speed of the wheel is more than 80km/h, the input current is 2.5A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011529592.8A CN112477979A (en) | 2020-12-22 | 2020-12-22 | Electric power-assisted steering mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011529592.8A CN112477979A (en) | 2020-12-22 | 2020-12-22 | Electric power-assisted steering mechanism |
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| CN112477979A true CN112477979A (en) | 2021-03-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112793661A (en) * | 2021-03-24 | 2021-05-14 | 浙江爱特新能源汽车有限公司 | New energy commercial vehicle steering system |
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2020
- 2020-12-22 CN CN202011529592.8A patent/CN112477979A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112793661A (en) * | 2021-03-24 | 2021-05-14 | 浙江爱特新能源汽车有限公司 | New energy commercial vehicle steering system |
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