CN113335010B - Wheel base control device and wheel base control method based on torsion beam suspension - Google Patents
Wheel base control device and wheel base control method based on torsion beam suspension Download PDFInfo
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- CN113335010B CN113335010B CN202110730184.7A CN202110730184A CN113335010B CN 113335010 B CN113335010 B CN 113335010B CN 202110730184 A CN202110730184 A CN 202110730184A CN 113335010 B CN113335010 B CN 113335010B
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- wheel base
- torsion beam
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- base control
- side wall
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/0152—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit
- B60G17/0157—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the action on a particular type of suspension unit non-fluid unit, e.g. electric motor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G17/00—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load
- B60G17/015—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements
- B60G17/019—Resilient suspensions having means for adjusting the spring or vibration-damper characteristics, for regulating the distance between a supporting surface and a sprung part of vehicle or for locking suspension during use to meet varying vehicular or surface conditions, e.g. due to speed or load the regulating means comprising electric or electronic elements characterised by the type of sensor or the arrangement thereof
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G21/00—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces
- B60G21/02—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected
- B60G21/04—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically
- B60G21/05—Interconnection systems for two or more resiliently-suspended wheels, e.g. for stabilising a vehicle body with respect to acceleration, deceleration or centrifugal forces permanently interconnected mechanically between wheels on the same axle but on different sides of the vehicle, i.e. the left and right wheel suspensions being interconnected
- B60G21/051—Trailing arm twist beam axles
- B60G21/052—Mounting means therefor
- B60G21/053—Mounting means therefor adjustable
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/10—Mounting of suspension elements
- B60G2204/11—Mounting of sensors thereon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60G—VEHICLE SUSPENSION ARRANGEMENTS
- B60G2204/00—Indexing codes related to suspensions per se or to auxiliary parts
- B60G2204/80—Interactive suspensions; arrangement affecting more than one suspension unit
- B60G2204/83—Type of interconnection
- B60G2204/8302—Mechanical
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Vehicle Body Suspensions (AREA)
Abstract
The invention provides a wheel base control device and a wheel base control method based on a torsion beam suspension, and belongs to the technical field of automobile chassis systems. The wheel base control device comprises an adjusting device, a torsion beam support, a driving assembly and an electronic control assembly. The adjusting device comprises a connecting support and a transmission device, and the connecting support is used for being fixedly connected with a vehicle body of a vehicle. The torsion beam support is used for being fixedly connected with the other end of the longitudinal beam and is connected with the connecting support through a transmission device. The driving assembly is arranged on the connecting support and can drive the torsion beam support to move in the length direction of the vehicle. The electronic control assembly comprises a sensor and an electronic control unit, the sensor is used for detecting the ground clearance of the longitudinal beam, and the electronic control unit can control the driving assembly to drive the torsion beam bracket to move in the length direction of the vehicle according to the ground clearance of the longitudinal beam. The wheel base control device can dynamically adjust and control the wheel base of the vehicle, and improves the driving comfort and safety of the vehicle.
Description
Technical Field
The invention relates to the technical field of automobile chassis systems, in particular to a wheel base control device and a wheel base control method based on a torsion beam suspension.
Background
The torsion beam suspension is the most common rear suspension structure of domestic automobiles and joint wagons at entry level, and has two main advantages: the first torsion beam suspension has low manufacturing cost, the second torsion beam suspension has high bearing capacity, and a hard beam with certain torque capacity is used for bearing, so that the bearing capacity and the structural stability can be ensured in a dynamic state when a vehicle runs. The front point of the longitudinal beam of the rear torsion beam suspension is usually fixedly connected with a vehicle body, when the moving posture of the vehicle is changed, the beam body moves in an arc shape due to the structural characteristic limitation, and redundant horizontal displacement is brought to tires to change the wheelbase of the whole vehicle, so that the performance of the vehicle is influenced.
In the related art, the wheelbase of the vehicle is usually tested and corrected by the wheelbase testing device while regular maintenance is performed on the vehicle. By parking and fixing the vehicle on a rack having a plurality of supporting seats, the distance between the two supporting seats is changed in real time by using a hydraulic cylinder and an electro-hydraulic rod. When the interval between two supporting seats was pulled open gradually, changed the length of wheel base pole through the threaded rod, realized the adjustment to vehicle wheel base.
In the wheel base adjusting method in the related art, a driver is required to go to a maintenance organization such as a 4S store regularly, and the adjustment cannot be performed in time when a vehicle normally runs. If the wheelbase of the whole vehicle is changed to a certain extent when a driver drives the vehicle normally, the driving comfort and the safety of the vehicle can be reduced while the performance of the vehicle is influenced.
Disclosure of Invention
The embodiment of the invention provides a wheel base control device and a wheel base control method based on a torsion beam suspension, which can realize dynamic adjustment and control of a vehicle wheel base by adjusting the position of the torsion beam suspension in real time and improve the driving comfort and safety of a vehicle. The technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides a wheel base control device based on a torsion beam suspension, including:
the adjusting device comprises a connecting bracket and a transmission device, the connecting bracket is used for being fixedly connected with the body of a vehicle, and the transmission device is fixedly connected with the other end of the longitudinal beam;
the driving assembly is arranged on the connecting bracket and is configured to be in transmission connection with the transmission device so as to drive the longitudinal beam to move in the length direction of the vehicle;
the electronic control assembly comprises a sensor and an electronic control unit, the sensor is used for being installed on the longitudinal beam to detect the ground clearance of the longitudinal beam, the electronic control unit is electrically connected with the sensor and the driving assembly, and the electronic control unit is configured to be capable of controlling the driving assembly to drive the longitudinal beam to move in the length direction of the vehicle according to the ground clearance of the longitudinal beam.
Optionally, the transmission device includes a rack and a gear, the rack is slidably mounted on the connecting bracket and arranged along the length direction of the vehicle, and the gear is in transmission connection with the driving assembly and meshed with the rack.
Optionally, the connecting bracket includes a first side wall and a second side wall which are arranged at an interval, the rack is located between the first side wall and the second side wall, a sliding groove is formed in the first side wall and arranged along the length direction of the vehicle, a first limiting protrusion matched with the sliding groove is formed in one side edge of the rack in the length direction, and the first limiting protrusion is inserted into the sliding groove.
Optionally, the driving assembly includes a motor and an input shaft, the motor is electrically connected to the electronic control unit, the motor is disposed on the second side wall and located on two opposite sides of the second side wall with the rack, the second side wall has a limiting hole, the input shaft is rotatably inserted into the limiting hole, one end of the input shaft is in transmission connection with the motor, and the other end of the input shaft is coaxially connected to the gear.
Optionally, the other end of the input shaft is spline-fitted with the gear.
Optionally, the wheel base control device further comprises a rotating bearing, the rotating bearing is installed in the limiting hole, an outer ring of the rotating bearing is fixedly connected with a hole wall of the limiting hole, and an inner ring of the rotating bearing is fixedly connected with the input shaft.
Optionally, the second side wall has a mounting bracket thereon, and the motor is detachably connected to the mounting bracket.
Optionally, the wheel base control device further includes a torsion beam bracket, the torsion beam bracket is used for being fixedly connected with the other end of the longitudinal beam, the torsion beam bracket is connected with the connecting bracket through the transmission device, at least one of the first side wall and the second side wall is provided with a strip-shaped limiting groove arranged along the length direction of the vehicle, the torsion beam bracket is provided with a second limiting protrusion matched with the strip-shaped limiting groove, and the second limiting protrusion is inserted into the strip-shaped limiting groove.
Optionally, the connecting bracket and the torsion beam bracket are steel structural members.
In a second aspect, an embodiment of the present invention further provides a method for controlling an axle distance, which is implemented by using the axle distance control device based on a torsion beam suspension according to the first aspect, and the method includes:
acquiring the ground clearance of the longitudinal beam of the torsion beam suspension;
acquiring displacement variation of the cross beam in the length direction of the vehicle body based on the ground clearance of the longitudinal beam;
controlling the driving assembly to drive the longitudinal beam to move in the length direction of the vehicle based on the displacement change amount so as to adjust the wheel base of the vehicle.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the connecting bracket is fixedly connected with the body of the vehicle, and the transmission device is fixedly connected with the other end of the longitudinal beam of the torsion beam suspension. During the running process of the vehicle, the wheelbase control device monitors the ground clearance of the longitudinal beam, namely the beam body of the cross beam of the torsion beam suspension in real time by using a sensor arranged on the longitudinal beam. When the moving posture of the vehicle is changed, the beam body of the beam moves in an arc shape due to the structural characteristic limitation of the beam body, and accordingly redundant horizontal displacement is brought to tires to cause the change of the wheel base of the whole vehicle. The longitudinal beam connected to the hub of the tire is also displaced, and eventually, the entire torsion beam suspension is displaced in the longitudinal direction of the vehicle, and accordingly, the height of the longitudinal beam from the ground is also changed in accordance with the displacement of the torsion beam suspension. When the sensor detects that the ground clearance of the longitudinal beam changes, the electronic control unit of the vehicle receives a detection signal of the sensor, converts the variation of the ground clearance into the displacement in the length direction of the vehicle through a trigonometric function, and finally sends a control signal to the driving assembly, and the driving assembly is controlled to push the longitudinal beam and the whole torsion beam suspension to move along the direction opposite to the displacement variation direction through the transmission device, so that the axle distance change caused by the self-structure limitation of the torsion beam suspension is compensated, the dynamic adjustment and control of the axle distance of the vehicle are realized, and the driving comfort and the safety of the vehicle are improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a wheel base control device based on a torsion beam suspension according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an adjustment device and a drive assembly provided by an embodiment of the present invention;
FIG. 3 is a partial cross-sectional view of an adjustment mechanism and drive assembly provided in accordance with an embodiment of the present invention;
fig. 4 is a control structure block diagram of a wheel base control device based on a torsion beam suspension according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for controlling an axle distance according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
In the related art, the wheelbase of the vehicle is usually tested and corrected by the wheelbase testing device while regular maintenance is performed on the vehicle. By parking and fixing the vehicle on a rack having a plurality of supporting seats, the distance between the two supporting seats is changed in real time by using a hydraulic cylinder and an electro-hydraulic rod. When the interval between two supporting seats was pulled open gradually, changed the length of wheel base pole through the threaded rod, realized the adjustment to vehicle wheel base.
In the wheel base adjusting method in the related art, a driver is required to go to a maintenance organization such as a 4S store regularly, and the adjustment cannot be performed in time when a vehicle normally runs. If the wheelbase of the whole vehicle is changed to a certain extent when a driver drives the vehicle normally, the driving comfort and the safety of the vehicle can be reduced while the performance of the vehicle is influenced.
Fig. 1 is a schematic structural diagram of a wheel base control device based on a torsion beam suspension according to an embodiment of the present invention. Fig. 2 is a schematic structural diagram of an adjusting device and a driving assembly according to an embodiment of the present invention. Fig. 3 is a partial sectional view of an adjusting device and a driving assembly according to an embodiment of the present invention. Fig. 4 is a control structure block diagram of a wheel base control device based on a torsion beam suspension according to an embodiment of the present invention. As shown in fig. 1 to 4, a torsion beam suspension m to which the wheel base control device provided by the present invention is applied illustratively includes a cross member m1 and a longitudinal member m2 connected to both sides of the cross member m1, and one end of the longitudinal member m2 is used for connecting with a wheel hub. Through practice, the present inventors provide an axle distance control device comprising an adjustment device 1, a torsion beam bracket 2, a drive assembly 3, and an electronic control assembly 4.
The adjusting device 1 comprises a connecting bracket 11 and a transmission device 12, wherein the connecting bracket 11 is used for being fixedly connected with a vehicle body of a vehicle. The torsion beam bracket 2 is used for being fixedly connected with the other end of the longitudinal beam m2, and the torsion beam bracket 2 is connected with the connecting bracket 11 through the transmission device 12. The driving assembly 3 is disposed on the connecting bracket 11, and the driving assembly 3 is configured to be in transmission connection with the transmission device 12 to drive the torsion beam bracket 2 to move in the length direction of the vehicle. The electronic control assembly 4 comprises a sensor 41 and an electronic control unit 42. The sensor 41 is intended to be mounted on the longitudinal beam m2 to detect the height of the longitudinal beam m2 from the ground. The electronic control unit 42 is electrically connected to the sensor 41 and the driving assembly 3, and the electronic control unit 42 is configured to control the driving assembly 3 to drive the torsion beam bracket 2 to move in the longitudinal direction of the vehicle according to the height of the side beam m2 from the ground.
In the embodiment of the present invention, the wheel base control device is fixedly connected to the vehicle body by the connecting bracket 11, and is fixedly connected to the other end of the side member m2 of the torsion beam suspension m by the torsion beam bracket 2. During the running of the vehicle, the wheel base control device monitors the ground clearance of the beam body of the cross beam m1 of the torsion beam suspension m, namely the ground clearance of the longitudinal beam m2 in real time by using the sensor 41 arranged on the longitudinal beam m 2. When the moving posture of the vehicle is changed, the beam body of the beam m1 moves in an arc shape due to the structural characteristic limitation, so that redundant horizontal displacement is brought to the tire to cause the change of the wheel base of the whole vehicle. The side member m2 connected to the hub of the tire is also displaced, and eventually, the torsion beam suspension m as a whole is displaced in the longitudinal direction of the vehicle, and accordingly, the height of the side member m2 from the ground is also changed in accordance with the displacement of the torsion beam suspension m. When the sensor 41 detects that the ground clearance of the longitudinal beam m2 changes, the electronic control unit 42 of the vehicle receives the detection signal of the sensor 41, converts the variation of the ground clearance into the displacement in the length direction of the vehicle through a trigonometric function, and finally sends a control signal to the driving assembly 3, so that the driving assembly 3 is controlled to drive the torsion beam bracket 2 through the transmission device 12 to push the longitudinal beam m2 and the whole torsion beam suspension m to move along the direction opposite to the variation direction of the displacement, so as to compensate the axle distance change of the torsion beam suspension m caused by the structural limitation of the torsion beam suspension m, realize the dynamic adjustment and control of the axle distance of the vehicle, and improve the driving comfort and safety of the vehicle.
It should be noted that, in the embodiment of the present invention, the torsion beam bracket 2 may not be provided, and the transmission device 12 may be directly connected to the other end of the longitudinal beam m2, as long as pushing of the longitudinal beam m2 is achieved to drive the entire torsion beam suspension m to move, which is not limited in the embodiment of the present invention.
Exemplarily, in the embodiment of the present invention, the connection bracket 11 is connected to the body of the vehicle by welding.
Optionally, the transmission 12 includes a rack 121 and a gear 122, the rack 121 is slidably mounted on the connecting bracket 11 and arranged along the length direction of the vehicle, and the gear 122 is in transmission connection with the driving assembly 3 and meshed with the rack 121. Illustratively, in the embodiment of the present invention, when the driving assembly 3 receives a control signal from the electronic control unit 42, the driving assembly drives the gear 122 connected thereto to rotate. The rotation of the gear 122 then drives the rack 121 engaged therewith to slide along the length direction of the vehicle, thereby driving the torsion beam bracket 2 to push the longitudinal beam m2 and the entire torsion beam suspension m to move. The torsion beam support 2 is driven to move by adopting a gear transmission connection mode, the transmission ratio is accurate, the transmission efficiency is high, and the operation stability of the wheel base control device can be improved.
Optionally, the connecting bracket 11 includes a first side wall 111 and a second side wall 112 arranged at an interval, the rack 121 is located between the first side wall 111 and the second side wall 112, the first side wall 111 has a sliding slot 1111 arranged along the length direction of the vehicle, one side edge of the rack 121 in the length direction has a first limit protrusion 1211 matched with the sliding slot 1111, and the first limit protrusion 1211 is inserted into the sliding slot 1111. For example, vibration inevitably occurs while the vehicle is running, which may cause the rack 121 to be displaced when sliding in the longitudinal direction of the vehicle and thus cause a reduction in the control accuracy of the wheel base. In the embodiment of the present invention, the first side wall 111 of the connecting bracket 11 is provided with the sliding groove 1111 disposed along the length direction of the vehicle, and one side of the rack 121 is provided with the first limit projection 1211 fittingly inserted into the sliding groove 1111. In the sliding process of the rack 121, the groove wall of the sliding groove 1111 can limit and guide the first limit projection 1211 in the vertical direction, so that the rack 121 is prevented from shaking and deviating in the vertical direction due to vibration, and the operation stability of the wheel base control device is further improved.
Optionally, the driving assembly 3 includes a motor 31 and an input shaft 32, the motor 31 is electrically connected to the electronic control unit 42, the motor 31 is disposed on the second side wall 112 and located on two opposite sides of the second side wall 112 with the rack 121, the second side wall 112 has a limiting hole 1121, the input shaft 32 is rotatably inserted into the limiting hole 1121, one end of the input shaft 32 is in transmission connection with the motor 31, and the other end of the input shaft 32 is coaxially connected with the gear 122. Illustratively, in the embodiment of the present invention, after the electric motor 31 receives the control signal from the electronic control unit 42, the output end of the electric motor 31 drives the input shaft 32 to rotate, and further drives the gear 122 connected to the other end of the input shaft 32 to rotate. The limiting hole 1121 is in running fit with the input shaft 32, and the hole wall of the limiting hole 1121 can limit the input shaft 32, so that the input shaft 32 is prevented from shaking due to vibration of a vehicle, the gear 122 can be stably meshed with the rack 121 for transmission, and the running stability of the wheel base control device is further improved.
Alternatively, the other end of the input shaft 32 is spline-fitted with the gear 122. Illustratively, in the embodiment of the present invention, the inner race of the gear 122 has an internal spline, and the other end of the input shaft 32 has an external spline, and when the drive assembly 3 is assembled, the gear 122 is socket-assembled on the input shaft 32 by aligning the internal spline of the gear 122 with the external spline of the input shaft 32. By utilizing the engagement between the teeth of the internal spline and the external spline, the total contact area of the gear 122 and the input shaft 32 is increased, so that the gear 122 can bear larger load, meanwhile, the centering performance is good, the mounting precision is high, and the operation stability of the wheelbase control device can be further improved.
Optionally, the wheel base control device further includes a rotating bearing 5, the rotating bearing 5 is installed in the limiting hole 1121, an outer ring of the rotating bearing 5 is fixedly connected with a hole wall of the limiting hole 1121, and an inner ring of the rotating bearing 5 is fixedly connected with the input shaft 32. Exemplarily, in the embodiment of the present invention, the rotational bearing 5 is disposed in the limiting hole 1121, and the input shaft 32 is supported by the rotational bearing 5, so that the input shaft 32 is prevented from directly contacting with the hole wall of the limiting hole 1121 during rotation, the friction coefficient during rotation is reduced, the rotation precision is improved, and the operation stability and the service life of the wheelbase control device are further improved.
Optionally, the second side wall 112 has a mounting bracket 1122 thereon, and the motor 31 is detachably connected to the mounting bracket 1122. Illustratively, in the present embodiment, the motor 31 is fixedly mounted to the mounting bracket 1122 on the second side wall 112 by bolts. Simple structure, easy dismounting, the car owner can swiftly maintain and change after motor 31 uses for a long time, and need not to carry out dismouting and change whole wheel base controlling means, has improved wheel base controlling means's practicality.
Optionally, at least one of the first side wall 111 and the second side wall 112 has a strip-shaped limiting groove 113 arranged along the length direction of the vehicle, the torsion beam bracket 2 has a second limiting protrusion 21 matched with the strip-shaped limiting groove 113, and the second limiting protrusion 21 is inserted into the strip-shaped limiting groove 113. Exemplarily, in the present embodiment, the first side wall 111 and the second side wall 112 are each provided with a bar-shaped stopper groove 113 arranged along the length direction of the vehicle. Correspondingly, two ends of the torsion beam bracket 2 are also respectively provided with a second limiting protrusion 21 and respectively inserted into the strip-shaped limiting grooves 113 on the first side wall 111 and the second side wall 112. When the torsion beam bracket 2 is driven by the rack 121 to move, the strip-shaped limiting grooves 113 on the two sides can limit and guide the moving path of the torsion beam bracket, so that the torsion beam bracket 2 is prevented from shaking and deviating due to vibration caused by vehicle running and the like, and the running stability of the wheelbase control device is further improved.
Alternatively, the connecting bracket 11 and the torsion beam bracket 2 are steel structural members. Illustratively, in the embodiment of the invention, the steel structural member has good toughness and heat resistance, uniform material and high mechanical strength. The steel connecting support 11 and the torsion beam support 2 are adopted, so that the service life of the wheel base control device can be effectively prolonged. Meanwhile, the steel has good plasticity, convenient processing and short manufacturing period, and can reduce the processing cost.
Fig. 5 is a flowchart of a method for controlling an axle distance according to an embodiment of the present invention. As shown in fig. 5, the present invention also provides a wheel base control method, which is implemented by using the wheel base control device based on the torsion beam suspension shown in fig. 1 to 4, and includes:
s51, the height of the side member m2 from the ground of the torsion beam suspension is acquired.
In this step, the wheel base control device monitors the height from the ground of the side member m2, that is, the gap from the ground of the cross member m1 of the torsion beam suspension m in real time by the sensor 41 mounted on the side member m2 during the running of the vehicle.
S52, the amount of displacement change of the cross member m1 in the longitudinal direction of the vehicle body is obtained based on the height of the side member m2 from the ground.
In this step, when the sensor 41 detects that the height of the side member m2 from the ground has changed, the electronic control unit 42 of the vehicle receives the detection signal of the sensor 41 and converts the change amount of the height from the ground into the displacement amount of the cross member m1 in the longitudinal direction of the vehicle by a trigonometric function.
S53, the driving unit 3 is controlled based on the displacement change amount to drive the side member m2 to move in the longitudinal direction of the vehicle, so as to adjust the wheel base of the vehicle.
In this step, the electronic control unit 42 sends a control signal to the driving assembly 3 based on the displacement amount of the cross beam m1 in the length direction of the vehicle, and controls the driving assembly 3 to drive the torsion beam bracket 2 through the transmission device 12 to push the longitudinal beam m2 and the entire torsion beam suspension m to move in the direction opposite to the displacement change direction, so as to compensate for the axle distance change of the torsion beam suspension m due to the self-structure limitation.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprise" or "comprises", and the like, means that the element or item listed before "comprises" or "comprising" covers the element or item listed after "comprising" or "comprises" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, which may also change accordingly when the absolute position of the object being described changes.
The invention is not to be considered as limited to the particular embodiments shown and described, but is to be understood that various modifications, equivalents, improvements and the like can be made without departing from the spirit and scope of the invention.
Claims (10)
1. A wheel base control device based on a torsion beam suspension, the torsion beam suspension (m) comprising a cross beam (m1) and a longitudinal beam (m2) connected on both sides of the cross beam (m1), one end of the longitudinal beam (m2) being used for connecting with a wheel hub, characterized by comprising:
the adjusting device (1) comprises a connecting bracket (11) and a transmission device (12), the connecting bracket (11) is fixedly connected with the body of a vehicle, and the transmission device (12) is fixedly connected with the other end of the longitudinal beam (m 2);
a driving assembly (3) arranged on the connecting bracket (11), wherein the driving assembly (3) is configured to be in transmission connection with the transmission device (12) so as to drive the longitudinal beam (m2) to move in the length direction of the vehicle;
an electronic control assembly (4) comprising a sensor (41) and an electronic control unit (42), the sensor (41) being intended to be mounted on the longitudinal beam (m2) in order to detect the height of the longitudinal beam (m2) from the ground, the electronic control unit (42) being electrically connected to the sensor (41) and to the drive assembly (3), the electronic control unit (42) being configured to be able to control the drive assembly (3) to drive the longitudinal beam (m2) in a movement in the longitudinal direction of the vehicle, depending on the height of the longitudinal beam (m2) from the ground.
2. The torsion beam suspension-based wheel base control device according to claim 1, wherein the transmission device (12) comprises a rack (121) and a gear (122), the rack (121) is slidably mounted on the connecting bracket (11) and arranged along the length direction of the vehicle, and the gear (122) is in transmission connection with the driving assembly (3) and is meshed with the rack (121).
3. The torsion beam suspension-based wheel base control device according to claim 2, wherein the connecting bracket (11) comprises a first side wall (111) and a second side wall (112) which are arranged at intervals, the rack (121) is located between the first side wall (111) and the second side wall (112), the first side wall (111) is provided with a sliding groove (1111) which is arranged along the length direction of the vehicle, one side edge of the rack (121) in the length direction is provided with a first limiting protrusion (1211) which is matched with the sliding groove (1111), and the first limiting protrusion (1211) is inserted into the sliding groove (1111).
4. The torsion beam suspension-based wheel base control device according to claim 3, wherein the driving assembly (3) comprises an electric motor (31) and an input shaft (32), the electric motor (31) is electrically connected with an electronic control unit (42), the electric motor (31) is arranged on the second side wall (112) and is located on two opposite sides of the second side wall (112) with the rack (121), a limit hole (1121) is formed in the second side wall (112), the input shaft (32) is rotatably inserted into the limit hole (1121), one end of the input shaft (32) is in transmission connection with the electric motor (31), and the other end of the input shaft (32) is coaxially connected with the gear (122).
5. The torsion beam suspension-based wheel base control device according to claim 4, wherein the other end of the input shaft (32) is spline-fitted with the gear (122).
6. The torsion beam suspension-based wheel base control device according to claim 4, wherein the wheel base control device further comprises a rotating bearing (5), the rotating bearing (5) is installed in the limiting hole (1121), an outer ring of the rotating bearing (5) is fixedly connected with a hole wall of the limiting hole (1121), and an inner ring of the rotating bearing (5) is fixedly connected with the input shaft (32).
7. The torsion beam suspension-based wheel base control device according to claim 4, wherein the second side wall (112) has a mounting bracket (1122) thereon, and the motor (31) is detachably connected to the mounting bracket (1122).
8. The torsion beam suspension-based wheel base control device according to claim 3, further comprising a torsion beam bracket (2), wherein the torsion beam bracket (2) is used for being fixedly connected with the other end of the longitudinal beam (m2), the torsion beam bracket (2) is connected with the connecting bracket (11) through the transmission device (12), at least one of the first side wall (111) and the second side wall (112) is provided with a strip-shaped limiting groove (113) arranged along the length direction of the vehicle, the torsion beam bracket (2) is provided with a second limiting protrusion (21) matched with the strip-shaped limiting groove (113), and the second limiting protrusion (21) is inserted into the strip-shaped limiting groove (113).
9. The torsion beam suspension-based wheel base control apparatus according to any one of claims 1 to 8, wherein the connecting bracket (11) and the torsion beam bracket (2) are steel structural members.
10. A wheel base control method that is implemented using the wheel base control apparatus based on a torsion beam suspension according to any one of claims 1 to 9, the wheel base control method comprising:
acquiring a ground clearance of the longitudinal beam (m2) of the torsion beam suspension;
acquiring a displacement variation amount of the cross beam (m1) in a length direction of the vehicle body based on a ground clearance of the side beam (m 2);
controlling the driving assembly (3) to drive the longitudinal beam (m2) to move in the length direction of the vehicle based on the displacement change amount so as to adjust the wheel base of the vehicle.
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| CN114987617B (en) * | 2022-05-06 | 2023-04-18 | 东风汽车集团股份有限公司 | Battery pack and frame integrated structure with variable wheel base |
| CN116787989B (en) * | 2023-06-29 | 2023-12-08 | 江苏车驰汽车有限公司 | Device for controlling automobile suspension support hardness based on rotating speed and control method thereof |
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| CN113335010A (en) | 2021-09-03 |
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