CN109606457B - Steering column pipe, steering system and vehicle - Google Patents
Steering column pipe, steering system and vehicle Download PDFInfo
- Publication number
- CN109606457B CN109606457B CN201811451362.7A CN201811451362A CN109606457B CN 109606457 B CN109606457 B CN 109606457B CN 201811451362 A CN201811451362 A CN 201811451362A CN 109606457 B CN109606457 B CN 109606457B
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- steering column
- steering
- column tube
- locking device
- main shaft
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62D—MOTOR VEHICLES; TRAILERS
- B62D1/00—Steering controls, i.e. means for initiating a change of direction of the vehicle
- B62D1/02—Steering controls, i.e. means for initiating a change of direction of the vehicle vehicle-mounted
- B62D1/16—Steering columns
- B62D1/18—Steering columns yieldable or adjustable, e.g. tiltable
- B62D1/184—Mechanisms for locking columns at selected positions
Abstract
The invention particularly relates to a steering column tube, a steering system and a vehicle, wherein the steering column tube comprises an outer tube, an inner tube, a steering column tube main shaft, a locking device a, a locking device b and a clutch, the steering system comprises the steering column tube, a road feel motor and an electronic control unit, and a road feel motor in a steer-by-wire system is utilized to provide proper road feel for a driver under the condition of manual operation, so that the shrinkage of the steering column tube is realized under an automatic driving mode, the space degree of a cab is increased, the free switching between the automatic driving mode and a manual operation mode is realized, and the comfort of the driver under different operation modes is increased.
Description
Technical Field
The invention belongs to the field of research on vehicle steering systems, and particularly relates to a steering column tube, a steering system and a vehicle.
Background
At present, automatic driving technology is researched and developed in various parts of the world and becomes the current hotspot of the automobile industry. The automatic driving technology greatly improves the safety of the automobile, relieves the driving fatigue of the driver, enables the driver to watch the road condition without tension, and can freely control the time. The steer-by-wire technology provides a good foundation for automatic driving, and a driver can enjoy driving pleasure during manual operation while enjoying the automatic driving technology.
In the prior art, a servo motor is used, and a worm wheel and a worm are used for directly driving a threaded spindle to rotate, so that a threaded shaft connected with a steering column tube enters the threaded spindle through rotation, and the steering column tube is contracted. The device needs to add a servo motor additionally to realize the contraction and the extension of the steering column, has complex and various parts and high cost, and is difficult to apply to the existing steer-by-wire system.
Disclosure of Invention
The present invention aims to solve at least one of the above technical problems to a certain extent. Therefore, the invention provides the steering column tube which is simple in structure, the main shaft of the steering column tube can be contracted, and the space degree of a cab is increased.
The invention also provides a steering system with the steering column tube and a method thereof, which utilize a road feel motor in a steer-by-wire system to provide proper road feel for a driver under the condition of manual operation without adding any driving motor, and realize the contraction of the steering column tube in an automatic driving mode to increase the space of a cockpit and realize the free switching of two modes to increase the comfort of the driver in different operation modes.
The invention also provides a vehicle with the steering system.
The technical scheme of the invention is as follows: a steering column tube comprises
An outer cylinder is arranged on the outer cylinder,
the inner cylinder is positioned inside the outer cylinder;
the steering column tube main shaft sequentially penetrates through the through holes in the tops of the outer barrel and the inner barrel from top to bottom, and the tail end of the steering column tube main shaft is in threaded connection with the inner wall of the inner barrel;
the locking device a is connected with the outer cylinder and the steering column tube main shaft and locks or separates the outer cylinder and the steering column tube main shaft;
the locking device b is connected with the inner cylinder and the steering column tube main shaft and locks or separates the inner cylinder and the steering column tube main shaft;
and the clutch is connected with the outer cylinder and the inner cylinder and enables the outer cylinder and the inner cylinder to be combined or separated.
In the above scheme, the method further comprises
A fixing device for connecting with a frame of a vehicle;
and the ball bearing is connected with the outer cylinder and the fixing device.
In the above scheme, the locking device a and the locking device b are electromagnetic locking devices;
a locking execution component of the locking device a is arranged on the inner wall of the through hole of the outer cylinder, and the locking component is arranged on the steering column pipe;
a locking execution component of the locking device b is arranged on the inner wall of the through hole of the inner cylinder, and the locking component is arranged on the steering column pipe;
a steering system comprises the steering column tube, a detection mechanism, a road sensing motor and an electronic control unit;
the road sensing motor is connected with the outer cylinder of the steering column pipe;
the detection mechanism is used for detecting signals, and the signals comprise a mode selection signal, a front wheel steering angle signal, a steering wheel torque signal, a vehicle speed signal, a steering angle signal of a road sensing motor and a torque signal of the road sensing motor;
and the electronic control unit is respectively connected with the detection mechanism, the road sensing motor, a locking device a and a locking device b of the steering column tube and the clutch.
In the scheme, the device further comprises a speed reducing mechanism;
the road sensing motor is connected with one end of the speed reducing mechanism, and the other end of the speed reducing mechanism is connected with the outer cylinder of the steering column pipe.
A control method according to the steering system, comprising the steps of:
the electronic control unit judges whether the mode to be executed by the steering system is a manual operation mode, an automatic driving mode or a mode to be switched to a manual operation mode according to the signals detected by the detection mechanism, wherein the signals comprise a mode selection signal, a front wheel steering angle signal, a steering wheel torque signal, a vehicle speed signal, a steering angle signal of the road sensing motor and a torque signal of the road sensing motor, and controls the road sensing motor, a locking device a of a steering column tube, a locking device b and a clutch to work.
In the above scheme, the control of the manual operation mode specifically includes:
the electronic control unit controls a locking device a to lock the outer cylinder and the steering column tube main shaft, controls the clutch to separate the outer cylinder from the inner cylinder, controls a locking device b to combine the inner cylinder and the steering column tube main shaft, controls the road sensing motor to drive the outer cylinder to rotate, and controls the outer cylinder to drive the steering column tube main shaft to rotate according to signals detected by the detection mechanism, wherein the signals comprise a front wheel steering angle signal, a steering wheel torque signal, a vehicle speed signal, a road sensing motor steering angle signal and a road sensing motor torque signal.
In the above scheme, the controlling of the automatic driving mode specifically includes:
the electronic control unit controls the locking device a to separate the outer cylinder from the steering column tube main shaft according to signals detected by the detection mechanism, controls the clutch to combine the outer cylinder with the inner cylinder, controls the locking device b to separate the inner cylinder from the steering column tube main shaft, controls the road sensing motor to drive the outer cylinder to rotate clockwise, and controls the outer cylinder to drive the inner cylinder to rotate clockwise to enable the steering column tube main shaft to move downwards along the axial direction, so that the steering column tube main shaft can be contracted.
In the above scheme, the control of switching the automatic driving mode to the manual operation mode specifically includes:
the electronic control unit controls the road sensing motor to drive the outer barrel to rotate anticlockwise according to signals detected by the detection mechanism, the outer barrel drives the inner barrel to rotate anticlockwise, the steering column tube main shaft moves upwards along the axial direction, so that the steering column tube main shaft recovers the manually operated height, the locking device a is controlled to lock the outer barrel and the steering column tube main shaft, the clutch is controlled to separate the outer barrel from the inner barrel, and the locking device b is controlled to lock the inner barrel and the steering column tube main shaft, so that the road sensing motor can continue to provide road sensing.
A vehicle includes the steering system.
Compared with the prior art, the invention has the beneficial effects that:
1. the steering column tube has a simple structure, and the main shaft of the steering column tube can be contracted, so that the space degree of a cockpit is increased. The outer cylinder is connected with a fixing device through a ball bearing, and the fixing device is connected to the frame, so that the outer cylinder can be rotationally fixed on the frame.
2. The steering system with the steering column tube and the method thereof provided by the invention have the advantages that under the condition that no driving motor is added, the road feel motor in the steer-by-wire system is utilized to provide proper road feel for a driver under the condition of manual operation, the shrinkage of the steering column tube is realized under the automatic driving mode, the space degree of a cab is increased, the free switching of two modes is realized, and the comfort degree of the driver under different operation modes is increased. The original road sensing motor and the control unit in the steer-by-wire system are utilized, so that the additional cost is not increased, and the utilization rate of system parts is improved.
3. The steering system can realize mode switching by controlling the locking device and the electromagnetic clutch under the original road sensing controller, has quick response, is safe and reliable, and better promotes the application and development of the steer-by-wire system in a man-machine driving-together intelligent automobile.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic view showing the construction of a steering system having a steering column tube according to the present invention.
Fig. 2 is a control structure diagram of the present invention in the manual manipulation mode.
Fig. 3 is a control configuration diagram of the present invention in the automatic driving mode.
Fig. 4 is a control structure diagram of the present invention in recovering the manual driving mode.
Fig. 5 is a power transmission route in the case of manual manipulation of the present invention.
Fig. 6 is a power transmission route of the inventive autopilot steering column tube.
In the figure, 1-fixing device, 2-outer cylinder, 3-inner cylinder, 4-speed reducing mechanism, 5-thread tooth, 6-road feel motor, 7-locking device b, 8-clutch, 9-locking device a, 10-ball bearing, 11-steering column tube main shaft, 12-electronic control unit, 13-steering wheel.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The technical solution according to the present invention will be described in detail below with reference to the accompanying drawings.
Example 1
A steering column tube, as shown in FIG. 1, includes an outer cylinder 2, an inner cylinder 3, a steering column tube main shaft 11, a lock-up device a9, a lock-up device b7, and a clutch 8.
The inner cylinder 3 is positioned inside the outer cylinder 2;
the steering column tube main shaft 11 sequentially penetrates through holes in the tops of the outer barrel 2 and the inner barrel 3 from top to bottom, and the tail end of the steering column tube main shaft 11 is in threaded connection with the inner wall of the inner barrel 3;
the locking device a9 is connected with the outer cylinder 2 and the steering column main shaft 11; the locking device a9 locks or disengages the outer cylinder 2 and the column tube main shaft 11;
the locking device b7 is connected with the inner cylinder 3 and the steering column main shaft 11; the locking device b7 locks or separates the inner cylinder 3 and the steering column main shaft 11;
the clutch 8 is connected with the outer cylinder 2 and the inner cylinder 3; the clutch 8 couples and decouples the outer cylinder 2 and the inner cylinder 3.
Further, the device comprises a fixing device 1, wherein the fixing device 1 is used for being connected with a frame of a vehicle;
the outer cylinder 2 and the fixing device 1 are connected by a ball bearing 10. The spherical alloy steel balls of the ball bearing 10 are arranged between the inner steel ring and the outer steel ring, the outer steel ring is fixed on the fixing device 1 through welding, and the inner steel ring is fixed on the outer cylinder 2 through welding. The fixing device 1 is connected to the frame so as to ensure that the outer cylinder 2 is rotatably fixed to the frame.
Preferably, the locking device a9 and the locking device b7 are electromagnetic locking devices; the working principle of the electromagnetic locking device is similar to that of an electromagnetic brake, a locking shoe with a spring is in an extension state under the condition of power failure, and after the electromagnetic locking device is powered on, the locking shoe contracts towards an inner ring and is attached to a steering column tube main shaft 11 to be locked.
Specifically, a through hole A is formed in the upper end of the outer cylinder 2, an electromagnetic locking device a9 is installed to be connected with the steering column tube 11, a locking execution component of the locking device a9 is installed on the inner wall of the through hole A of the outer cylinder 2, and the locking component is installed on the steering column tube 11; the control of the locking and releasing of the locking device a9 allows the outer cylinder 2 to be coupled with the steering column tube 11 or to be rotated independently. The steering column main shaft 11 is retracted inwards from the inner wall of the outer cylinder 2 and locked, so that other interference does not occur when the steering column main shaft 11 moves downwards.
A through hole B is formed in the upper end of the inner cylinder 3, the position of the through hole A corresponds to that of the through hole B, the inner cylinder 3 is connected with the steering column tube 11 through an electromagnetic locking device B7, a locking execution part of a locking device B7 is installed on the inner wall of the through hole B of the inner cylinder 3, and the locking part is installed on the steering column tube 11; controlling the engagement and disengagement of the locking device b7 allows the inner tube 3 to be coupled with the column tube 11 or to be rotated independently. In order to reduce the moment of inertia of the column tube 11 when the steer-by-wire system provides a road feel, the inner tube 3 is manufactured using a lightweight material as much as possible and the processing thickness thereof is reduced as much as possible in practical use.
The clutch 8 is an electromagnetic clutch, a driving disc of the clutch 8 is arranged on the inner wall of the outer barrel 2, a driven disc is arranged on the outer wall of the inner barrel 3, and the outer barrel 2 and the inner barrel 3 can be combined or independent by the attraction and separation of the electromagnetic clutch 8.
Preferably, the clutch 8 is a fixed coil type clutch, the electromagnetic coil is fixed on the inner wall of the outer cylinder 2, and the driven disc is fixed on the outer wall of the upper end of the inner cylinder 3. When the electromagnetic coil is electrified, a stronger magnetic field is generated, so that the driven disc and the driving disc are attracted, and the outer cylinder 2 drives the inner cylinder 3 to rotate. When the electromagnetic coil is powered off, the magnetic field disappears, and the driven disc and the driving disc are separated by the action of the spring, so that the inner cylinder 2 is separated from the outer cylinder 3.
Example 2
A steering system, as shown in fig. 1, comprising a steering column tube, a detection mechanism, a road-feel motor 6, and an electronic control unit 12 described in embodiment 1;
the road sensing motor 6 is connected with the outer cylinder 2 of the steering column pipe;
the detection mechanism is used for detecting signals, and the signals comprise a mode selection signal, a front wheel steering angle signal, a steering wheel torque signal, a vehicle speed signal, a steering angle signal of a road sensing motor and a torque signal of the road sensing motor;
the electronic control unit 12 is connected to the detection mechanism, the road sensor motor 6, the lock-up device a9 of the steering column tube, the lock-up device b7, and the clutch 8.
Preferably, the detection mechanism comprises a mode selection button, a front wheel steering angle sensor, a steering wheel torque sensor, a vehicle speed sensor, a road sensing motor steering angle sensor and a road sensing motor torque sensor; the mode selection button is used for selecting a manual operation mode, an automatic driving mode or switching the automatic driving mode into a manual operation mode; the front wheel steering angle sensor is used for detecting a front wheel steering angle signal; the steering wheel angle sensor is used for detecting a steering wheel angle signal; the steering wheel torque sensor is used for detecting a steering wheel torque transmission signal; the vehicle speed sensor is used for detecting a vehicle speed signal; the road sensing motor corner sensor is used for detecting a road sensing motor corner signal; the road sensing motor torque sensor is used for detecting a road sensing motor torque signal.
Preferably, the electronic control unit 12 is a road induction motor controller in a steer-by-wire system, and controls the locking device a9, the locking device b7 and the electromagnetic clutch 8 to realize switching among different modes.
Preferably, a speed reduction mechanism 4 is further included; the road sensing motor 6 is connected with one end of the speed reducing mechanism 4, and the other end of the speed reducing mechanism 4 is connected with the outer cylinder 2 of the steering column pipe.
Under the control of the electronic control unit 12, the current magnitude and the rotation direction of the road sensing motor 6 are controlled, the power transmission routes are switched between the manual operation mode and the automatic driving mode by controlling the locking and the separation of the electromagnetic locking device and the attraction and the separation of the electromagnetic clutch 8, and then the road sensing motor 6 is used for providing torque to achieve the purposes of different modes.
Example 3
A control method of a steering system according to embodiment 2, comprising the steps of:
the detection mechanism detects a mode selection signal, a front wheel steering angle signal, a steering wheel torque signal, a vehicle speed signal, a steering angle signal of a road sensing motor and a torque signal of the road sensing motor, and transmits the mode selection signal, the front wheel steering angle signal, the steering wheel torque signal, the vehicle speed signal, the steering angle signal of the road sensing motor and the torque signal of;
the electronic control unit 12 determines whether the mode to be executed by the steering system is a manual operation mode, an automatic driving mode or a mode to be switched to a manual operation mode according to the signals detected by the detection mechanism, including a mode selection signal, a front wheel steering angle signal, a steering wheel torque signal, a vehicle speed signal, a steering angle signal of the road feel motor and a torque signal of the road feel motor, and controls the operations of the road feel motor 6, the locking device a9 of the steering column tube, the locking device b7 and the clutch 8.
The control process mainly includes that the electronic control unit 12 obtains a reference steering wheel moment according to a road feel control strategy by combining signals of a steering wheel angle sensor, a steering wheel angle/torque sensor, a vehicle speed sensor and the like in a manual operation mode, and controls the current of the road feel motor 6 to obtain expected road feel, so that a driver can complete steering better. The electronic control unit 12 can also drive the outer barrel 2 and the inner barrel 3 to rotate by utilizing the road feel motor 6 in the automatic driving mode, and the inner barrel 3 drives the thread teeth on the steering column tube main shaft 11 to rotate, so that the steering column tube main shaft 11 moves downwards along the axis to provide a larger space for a driving cabin, and a driver can freely entertain and relax in the driving cabin in the automatic driving mode to increase the driving experience.
As shown in fig. 2, in the manual manipulation mode, the steer-by-wire system needs to give a certain road feel to the driver. The electronic control unit 12 controls the locking device a9 to be locked, the locking device b7 to be locked, the clutch 8 to be separated, and the outer cylinder 2 and the steering column main shaft 11 to be combined and driven by the road sensing motor 6 to rotate together; the inner cylinder 3 is separated from the outer cylinder 2, and the inner cylinder 3 is coupled to the column shaft 11 and rotates with the rotation of the column shaft 11. The electronic control unit 12 controls the magnitude and direction of the current of the road feel motor 6 according to a corresponding algorithm, and transmits the torque to the steering column main shaft 11 through the speed reducing mechanism 4 and the outer cylinder 2, so that a driver can obtain a proper road feel. Fig. 5 is a power transmission route in manual manipulation.
Further, the control of the manual manipulation mode specifically includes:
a driver holds a steering wheel 13 by hand, the electronic control unit 12 controls a locking device a9 to lock according to signals detected by the detection mechanism, wherein the signals comprise a front wheel steering angle signal, a steering wheel torque signal, a vehicle speed signal, a steering angle signal of a road feel motor and a torque signal of the road feel motor, the electronic control unit 12 controls a locking device a9 to enable the outer cylinder 2 to be combined with the steering column tube main shaft 11, the outer cylinder 2 can drive the steering column tube main shaft 11 to rotate, and meanwhile, the steering column tube main shaft 11 is fixed; the clutch 8 is separated under the action of the electronic control unit 12, so that the inner cylinder 3 is separated from the outer cylinder 2; the locking device b7 is locked under the action of the electronic control unit 12, so that the inner cylinder 3 is combined with the steering column main shaft 11, the inner cylinder 3 and the steering column main shaft 11 rotate together, the control road sensing motor 6 drives the outer cylinder 2 to rotate through the speed reducing mechanism 4, and the outer cylinder 2 drives the steering column main shaft 11 to rotate. Therefore, a certain steering damping can be provided, and a certain road feeling can be obtained for the driver.
As shown in fig. 3, in the automatic driving mode, the retraction of the column main shaft 11 is achieved by the steer-by-wire road sensor motor 6. The electronic control unit 12 controls the locking device a9 to separate, the locking device b7 to separate, the clutch 8 to attract, the outer cylinder 2 and the steering column tube 11 to separate, the outer cylinder 2 and the inner cylinder 3 to combine, and the outer cylinder 2 and the inner cylinder 3 are driven by the road sensing motor 6 to rotate together through the speed reducing mechanism 4. At this time, a driver holds the steering wheel 13, the thread teeth 5 of the inner cylinder 3 are meshed with the threads on the steering column main shaft 11, and the inner cylinder 3 rotates to drive the steering column main shaft 11 to move downwards and axially, so that the steering column main shaft 11 is contracted. Fig. 6 is a power transmission route in which the column main shaft 11 is retracted.
Further, the control of the automatic driving mode specifically includes:
a driver holds the steering wheel 13 by hand, and the electronic control unit 12 controls the locking device a9 to separate the outer cylinder 2 from the steering column main shaft 11 and separate the outer cylinder 2 from the steering column 11 according to the signals detected by the detection mechanism, including the signal of the automatic driving mode, the rotation angle signal of the road feel motor and the torque signal of the road feel motor, so that the outer cylinder 2 can rotate independently without affecting each other; the clutch 8 is controlled to combine the outer cylinder 2 and the inner cylinder 3, so that the outer cylinder 2 and the inner cylinder 3 can rotate together; the locking device b7 is controlled to separate the inner cylinder 3 from the column tube main shaft 11, so that the steering main shaft can move up and down freely: when the driver switches to the automatic driving mode, the driver holds the steering wheel 13, the electronic control unit 12 controls the road feel motor 6 to drive the outer cylinder 2 to rotate clockwise by a certain angle through the speed reducing mechanism 4, because the outer cylinder 2 is combined with the inner cylinder 3 at the moment, the outer cylinder 2 drives the inner cylinder 3 to rotate clockwise by a certain angle, and the steering column tube main shaft 11 moves downwards by a certain distance along the axial direction while the inner cylinder 3 rotates, so that the steering column tube main shaft 11 can be retracted;
as shown in fig. 4, further, the control of switching the automatic driving mode to the manual operation mode specifically includes:
at this time, the driver holds the steering wheel 13 with a hand, the electronic control unit 12 controls the current of the road-sensing motor 6 to be opposite to the current of the road-sensing motor 6 in the automatic driving mode according to the signals detected by the detection mechanism, such that the road-sensing motor 6 rotates in the opposite direction to control the road-sensing motor 6 to drive the outer cylinder 2 to rotate counterclockwise by a certain angle, the outer cylinder 2 drives the inner cylinder 3 to rotate counterclockwise, the steering column tube main shaft 11 moves upward along the axial direction by a certain distance, so as to restore the steering column tube main shaft 11 to the manually-operated height, then the locking device a9 is controlled to lock the outer cylinder 2 and the steering column tube main shaft 11, the clutch 8 is controlled to separate the outer cylinder 2 from the inner cylinder 3, and the locking device b7 is controlled to lock the inner cylinder 3 and the steering column tube main shaft 11, thereby making the road feel motor continue to provide driving road feel.
Example 4
A vehicle including the steering column described in embodiment 1, the steering system described in embodiment 2, and the steering system control method described in embodiment 3, and thus having all the advantageous effects described in embodiments 1, 2, and 3, will not be described herein again.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.
Claims (8)
1. A steering system is characterized by comprising a steering column tube, a detection mechanism, a road sensing motor (6) and an electronic control unit (12);
the steering column tube comprises an outer tube (2), an inner tube (3), a steering column tube main shaft (11), a locking device a (9), a locking device b (7), a clutch (8), a fixing device (1) and a ball bearing (10); the inner cylinder (3) is positioned inside the outer cylinder (2); the steering column tube main shaft (11) sequentially penetrates through holes in the tops of the outer cylinder (2) and the inner cylinder (3) from top to bottom, and the tail end of the steering column tube main shaft (11) is in threaded connection with the inner wall of the inner cylinder (3); the locking device a (9) is connected with the outer cylinder (2) and a steering column tube main shaft (11); the locking device b (7) is connected with the inner cylinder (3) and the steering column tube main shaft (11); the clutch (8) is connected with the outer cylinder (2) and the inner cylinder (3); the fixing device (1) is used for being connected with a frame of a vehicle; the ball bearing (10) is connected with the outer cylinder (2) and the fixing device (1); the road sensing motor (6) is connected with the outer cylinder (2) of the steering column pipe;
the detection mechanism is used for detecting signals, and the signals comprise a mode selection signal, a front wheel steering angle signal, a steering wheel torque signal, a vehicle speed signal, a steering angle signal of a road sensing motor and a torque signal of the road sensing motor;
the electronic control unit (12) is respectively connected with the detection mechanism, the road sensing motor (6), the locking device a (9) and the locking device b (7) of the steering column tube and the clutch (8); the electronic control unit (12) judges whether the mode to be executed by the steering system is a manual operation mode, an automatic driving mode or an automatic driving mode according to the mode selection signal, the front wheel steering angle signal, the steering wheel torque signal, the vehicle speed signal, the steering angle signal of the road feel motor and the torque signal of the road feel motor detected by the detection mechanism, and controls the road feel motor (6), the locking device a (9) of the steering column tube, the locking device b (7) and the clutch (8) to work.
2. The steering system according to claim 1, further comprising a speed reduction mechanism (4);
the road sensing motor (6) is connected with one end of the speed reducing mechanism (4), and the other end of the speed reducing mechanism (4) is connected with the outer cylinder (2) of the steering column pipe.
3. A steering system according to claim 1, characterized in that the locking means a (9) and b (7) are electromagnetic locking means;
a locking execution component of the locking device a (9) is arranged on the inner wall of the through hole of the outer cylinder (2), and the locking component is arranged on the steering column tube (11);
and a locking execution component of the locking device b (7) is arranged on the inner wall of the through hole of the inner cylinder (3), and the locking component is arranged on the steering column tube (11).
4. A control method of a steering system according to claim 1, characterized by comprising the steps of:
the electronic control unit (12) judges whether the mode to be executed by the steering system is a manual operation mode, an automatic driving mode or an automatic driving mode according to the mode selection signal, the front wheel steering angle signal, the steering wheel torque signal, the vehicle speed signal, the steering angle signal of the road feel motor and the torque signal of the road feel motor detected by the detection mechanism, and controls the road feel motor (6), the locking device a (9) of the steering column tube, the locking device b (7) and the clutch (8) to work.
5. The steering system control method according to claim 4, wherein the control of the manual manipulation mode is specifically:
the electronic control unit (12) controls a locking device a (9) to lock the outer cylinder (2) and a steering column tube main shaft (11) according to signals detected by the detection mechanism, including a front wheel steering angle signal, a steering wheel torque signal, a vehicle speed signal, a steering angle signal of a road feel motor and a torque signal of the road feel motor, controls a clutch (8) to separate the outer cylinder (2) and the inner cylinder (3), controls a locking device b (7) to combine the inner cylinder (3) and the steering column tube main shaft (11), controls the road feel motor (6) to drive the outer cylinder (2) to rotate, and controls the outer cylinder (2) to drive the steering column tube main shaft (11) to rotate.
6. The steering system control method according to claim 4, characterized in that the control of the automatic driving mode is specifically:
the electronic control unit (12) controls the locking device a (9) to separate the outer cylinder (2) from the steering column tube main shaft (11) according to signals detected by the detection mechanism, controls the clutch (8) to combine the outer cylinder (2) with the inner cylinder (3), controls the locking device b (7) to separate the inner cylinder (3) from the steering column tube main shaft (11), controls the road sensing motor (6) to drive the outer cylinder (2) to rotate clockwise, and drives the inner cylinder (3) to rotate clockwise, so that the steering column tube main shaft (11) moves downwards along the axial direction, and the steering column tube main shaft (11) can be contracted.
7. The steering system control method according to claim 4, wherein the control of switching the automatic driving mode to the manual operation mode is specifically:
a driver holds a steering wheel 13 by hand, an electronic control unit (12) controls a road feel motor (6) to drive an outer barrel (2) to rotate anticlockwise according to signals detected by a detection mechanism, the outer barrel (2) drives an inner barrel (3) to rotate anticlockwise, a steering column tube main shaft (11) moves upwards along the axial direction, so that the steering column tube main shaft (11) recovers the height of manual operation, then a locking device a (9) is controlled to lock the outer barrel (2) and the steering column tube main shaft (11), a clutch (8) is controlled to separate the outer barrel (2) from the inner barrel (3), and a locking device b (7) is controlled to lock the inner barrel (3) and the steering column tube main shaft (11).
8. A vehicle characterized by comprising the steering system of claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811451362.7A CN109606457B (en) | 2018-11-30 | 2018-11-30 | Steering column pipe, steering system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811451362.7A CN109606457B (en) | 2018-11-30 | 2018-11-30 | Steering column pipe, steering system and vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109606457A CN109606457A (en) | 2019-04-12 |
| CN109606457B true CN109606457B (en) | 2021-04-20 |
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| US11608088B2 (en) * | 2019-10-14 | 2023-03-21 | Continental Automotive Systems, Inc. | Optics based detection of hands on-off and hand gesture based function selection for human driver |
| CN110949492B (en) * | 2019-11-27 | 2021-06-22 | 江苏大学 | Wire-controlled steering fault-tolerant device and control method thereof |
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| CN112061224B (en) * | 2020-08-14 | 2022-08-30 | 开沃新能源汽车集团股份有限公司 | Automatic drive-by-wire telescopic mechanical redundant steering column |
| CN113525508B (en) * | 2021-07-23 | 2022-04-15 | 深圳华一精品科技有限公司 | Control method and control system of steering wheel, vehicle, computer equipment and computer readable storage medium |
| CN114435466B (en) * | 2022-01-20 | 2023-09-22 | 河北工程大学 | Drive-by-wire steering system capable of realizing mode switching and control method thereof |
| CN115027550B (en) * | 2022-06-14 | 2024-04-12 | 中国第一汽车股份有限公司 | Steering wheel, control method thereof and vehicle |
| CN114987598B (en) * | 2022-06-23 | 2023-05-05 | 新乡北方车辆仪表有限公司 | Multifunctional intelligent control steering wheel |
| CN115402399B (en) * | 2022-09-27 | 2023-12-29 | 上海集度汽车有限公司 | Method, equipment and product for locking steering wheel by wire |
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