Torsion beam assembly, vehicle and control method of vehicle

Abstract

The invention discloses a torsion beam assembly, a vehicle and a control method of the vehicle, the torsion beam assembly comprises two longitudinal beams which extend in the front-back direction of the vehicle, one end of each longitudinal beam is suitable for being connected with a wheel, the other end of each longitudinal beam is suitable for being connected with a vehicle body, and the number of the longitudinal beams is two; the cross beam extends in the left-right direction of the vehicle, the left end and the right end of the cross beam are connected with the two longitudinal beams respectively, and the cross beam can move in the front-back direction of the vehicle relative to the longitudinal beams; the driving part is connected with the cross beam, and the driving part is suitable for driving the cross beam to move back and forth relative to the longitudinal beam. According to the torsion beam assembly, the torsion rigidity of the torsion beam assembly can be adjusted by adjusting the relative positions of the cross beams and the longitudinal beams in the front-back direction, so that the adaptability of the torsion beam assembly to road conditions is improved, and the driving experience of people in a vehicle is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicles, and in particular to a torsion beam assembly, a vehicle and a control method for the vehicle. Background Art

[0002] Torsion beams are currently used in many vehicles. When the wheels are impacted during driving, the torsion beam will be torsionally deformed. In related technologies, the torsional stiffness of the torsion beam cannot be adjusted. When the vehicle passes through sections with different road conditions, the driving experience of the occupants is poor. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention is to provide a torsion beam assembly, which can change the torsion stiffness so that the torsion stiffness is more adapted to the road conditions.

[0004] The present invention also provides a vehicle having the torsion beam assembly.

[0005] The present invention also provides a control method applied to the above vehicle.

[0006] According to the first aspect of the present invention, the torsion beam assembly includes: a longitudinal beam, which extends along the front-to-rear direction of the vehicle, one end of which is suitable for being connected to a wheel, and the other end of which is suitable for being connected to a vehicle body, and the number of the longitudinal beams is two; a cross beam, which extends along the left-right direction of the vehicle, the left and right ends of which are respectively connected to the two longitudinal beams, and the cross beam is movable in the front-to-rear direction of the vehicle relative to the longitudinal beam; and a driving member, which is connected to the cross beam and is suitable for driving the cross beam to move forward and backward relative to the longitudinal beam.

[0007] According to the torsion beam assembly of the first aspect of the present invention, the torsional stiffness of the torsion beam assembly can be adjusted by adjusting the relative positions of the cross beam and the longitudinal beam in the front-rear direction, thereby improving the adaptability of the torsion beam assembly to road conditions and enhancing the driving experience of the occupants of the vehicle.

[0008] According to some embodiments of the present invention, the driving member is a driving motor having an output shaft, an output gear is sleeved on the output shaft, and the crossbeam is provided with a rack extending forward and backward on one side of the front and rear directions of the vehicle, and the output gear is engaged with the rack to drive the rack to move in the front and rear directions of the vehicle.

[0009] According to some embodiments of the present invention, the output gear is a helical gear, and the teeth on the rack are helical teeth.

[0010] According to some embodiments of the present invention, there are two driving members, and the two driving members are arranged at intervals in the left-right direction of the vehicle.

[0011] According to some embodiments of the present invention, a first sliding groove that passes through the cross beam front to back is formed on the left and right end faces of the cross beam, and a limiting portion is provided on the upper and lower side walls of the first sliding groove, and the upper and lower ends of the longitudinal beam are fitted between the limiting portion and the bottom wall of the first sliding groove.

[0012] According to some embodiments of the present invention, a hook portion is provided at one end of the two limiting portions facing each other, and the hook portion cooperates with the limiting portion to define a slot opening toward the side wall of the first sliding slot, and folded edges are provided at the upper and lower ends of the longitudinal beam, and the folded edges are fitted in the slot.

[0013] According to some embodiments of the present invention, the torsion beam assembly further comprises: a shock absorber and a shock absorbing spring, wherein the shock absorber and the shock absorbing spring are adapted to be connected between an end of the longitudinal beam close to the wheel and the vehicle body.

[0014] The vehicle according to the second aspect of the present invention comprises: a vehicle body; wheels; the torsion beam assembly according to the first aspect of the present invention, wherein one end of the longitudinal beam is connected to the wheel, and the other end of the longitudinal beam is connected to the vehicle body.

[0015] According to the vehicle of the second aspect of the present invention, by providing the torsion beam assembly according to the first aspect of the present invention, the driving experience of the occupants of the vehicle can be improved.

[0016] According to some embodiments of the present invention, the vehicle further comprises: a central domain controller, wherein the central domain controller is electrically connected to the driving component via a CAN bus.

[0017] The vehicle control method according to the third aspect of the present invention is applied to the vehicle according to the second aspect of the present invention, and the control method includes: S1, detecting the road condition of the road on which the vehicle is located; S2, controlling the driving member to drive the crossbeam to move forward and backward according to the road condition.

[0018] According to the vehicle control method of the third aspect of the present invention, the stiffness of the torsion beam assembly and its adaptability to road conditions can be improved.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic diagram of a torsion beam assembly according to an embodiment of the present invention;

[0021] Figure 2 yes Figure 1 An enlarged view of A shown in FIG.

[0022] Figure 3is a top view of a torsion beam assembly according to an embodiment of the present invention;

[0023] Figure 4 yes Figure 3 The torsion beam assembly shown in FIG. 1 is a top view of the crossbeam in position A;

[0024] Figure 5 yes Figure 3 The torsion beam assembly shown in FIG. 1 is a top view of the crossbeam in position B;

[0025] Figure 6 is a diagram showing the variation of the torsional stiffness of a torsion beam assembly with the position of a crossbeam according to an embodiment of the present invention;

[0026] Figure 7 is a cross-sectional view of a cross beam and a longitudinal beam according to an embodiment of the present invention;

[0027] Figure 8 is a flowchart of a vehicle control method according to an embodiment of the present invention.

[0028] Reference numerals:

[0029] 100. Torsion beam assembly;

[0030] 10. Stringer; 11. Folding edge;

[0031] 20. crossbeam; 21. rack; 22. first slide groove; 221. limiter; 222. hook;

[0032] 30. driving member; 31. output shaft; 32. output gear;

[0033] 40. Shock absorber;

[0034] 50. Damping spring;

[0035] 60.CAN bus. DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0037] Reference below Figure 1-Figure 8 A torsion beam assembly 100 according to an embodiment of a first aspect of the present invention is described.

[0038] like Figure 1-Figure 3 As shown, the torsion beam assembly 100 according to the first embodiment of the present invention includes: a longitudinal beam 10 , a cross beam 20 and a driving member 30 .

[0039] Specifically, the longitudinal beam 10 extends along the front-to-rear direction of the vehicle, one end of the longitudinal beam 10 is suitable for being connected to the wheel, and the other end of the longitudinal beam 10 is suitable for being connected to the vehicle body. There are two longitudinal beams 10, and the cross beam 20 extends along the left-right direction of the vehicle. The left and right ends of the cross beam 20 are respectively connected to the two longitudinal beams 10, and the cross beam 20 is movable in the front-to-rear direction of the vehicle relative to the longitudinal beam 10. The driving member 30 is connected to the cross beam 20, and the driving member 30 is suitable for driving the cross beam 20 to move forward and backward relative to the longitudinal beam 10.

[0040] It is understandable to those skilled in the art that when the cross beam 20 moves toward the wheel in the front-to-back direction, the length of the longitudinal beam 10 between the wheel and the cross beam 20 becomes shorter. When the impact force on one wheel is transmitted to the longitudinal beam 10 on the other side through the longitudinal beam 10 and the cross beam 20 on the same side, the force arm of the impact force becomes shorter. In this way, the torsion beam assembly 100 is not prone to torsional deformation after being impacted, thereby improving the torsional stiffness of the torsion beam assembly 100. Similarly, when the cross beam 20 moves away from the wheel in the front-to-back direction, the torsional stiffness of the torsion beam assembly 100 can be reduced.

[0041] like Figure 4-Figure 6 As shown, when the cross beam 20 moves between position A away from the wheel and position B close to the wheel, the torsional stiffness of the torsion beam assembly 100 is tested. When the cross beam 20 moves toward the wheel, the torsional stiffness of the torsion beam assembly 100 increases, and when the cross beam 20 moves away from the wheel, the torsional stiffness of the torsion beam assembly 100 decreases.

[0042] During the driving process of the vehicle, when the vehicle is driving on a bumpy road, the driving member 30 can drive the cross beam 20 to move away from the wheel in the front-to-back direction to reduce the stiffness of the torsion beam assembly 100. In this way, the torsion beam assembly 100 can produce a large degree of torsional deformation, thereby improving the stability of the vehicle body. When the vehicle is driving on a flat road, the driving member 30 can drive the cross beam 20 to move toward the wheel in the front-to-back direction to increase the stiffness of the torsion beam assembly 100. In this way, the stability of the vehicle when driving at high speed on a flat road can be improved, and the handling of the vehicle can be improved. In this way, the stiffness of the torsion beam assembly 100 can be improved to match the road conditions, thereby improving the driving experience of the occupants.

[0043] When the driving member 30 drives the cross beam 20 to adjust, the cross beam 20 can be adjusted manually by a person in the vehicle, or the vehicle can automatically adjust the cross beam 20 according to the road conditions.

[0044] According to the torsion beam assembly 100 of the first embodiment of the present invention, the torsional stiffness of the torsion beam assembly 100 can be adjusted by adjusting the relative positions of the cross beam 20 and the longitudinal beam 10 in the front-rear direction, thereby improving the adaptability of the torsion beam assembly 100 to road conditions and enhancing the driving experience of the occupants of the vehicle.

[0045] In some embodiments of the present invention, Figure 1 and Figure 2 As shown, the driving member 30 is a driving motor, and the driving motor has an output shaft 31, and an output gear 32 is sleeved on the output shaft 31. A rack 21 extending forward and backward is provided on one side of the cross beam 20 in the front-to-back direction of the vehicle, and the output gear 32 is engaged with the rack 21 to drive the rack 21 to move in the front-to-back direction of the vehicle. In this way, the driving member 30 can drive the cross beam 20 to move in the front-to-back direction of the vehicle relative to the longitudinal beam 10. Among them, the driving motor has a fast response, which can improve the response speed of the stiffness adjustment of the torsion beam assembly 100, and the driving motor is small in size and easy to arrange. Preferably, the driving motor is a servo motor; the rack 21 has a simple structure, which can reduce the difficulty of product design and reduce production costs.

[0046] In some embodiments of the present invention, Figure 2 As shown, the output gear 32 is a helical gear, and the teeth on the rack 21 are helical teeth. The helical gear has a strong load-bearing capacity and a smooth transmission process, thereby improving the reliability of the torsion beam assembly 100 during operation and reducing the noise during operation of the torsion beam assembly 100.

[0047] In some embodiments of the present invention, Figure 1 , Figure 3 , Figure 4 and Figure 5 As shown, there are two driving members 30, and the two driving members 30 are arranged at intervals in the left-right direction of the vehicle. In this way, the two driving members 30 can drive the cross beam 20 to move at two positions in the left-right direction of the cross beam 20, so that the driving force can be distributed more evenly on the cross beam 20, thereby improving the stability of the cross beam 20 during movement and reducing the noise caused by the jamming between the cross beam 20 and the longitudinal beam 10.

[0048] In some embodiments of the present invention, Figure 2 and Figure 7 As shown, the left and right end surfaces of the cross beam 20 are both formed with a first slide groove 22 that penetrates the cross beam 20 front and back, and the upper and lower side walls of the first slide groove 22 are both provided with a limit portion 221, and the upper and lower ends of the longitudinal beam 10 are matched between the limit portion 221 and the bottom wall of the first slide groove 22. In this way, the cross beam 20 can be connected to the longitudinal beam 10 in a movable manner in the front and rear direction, wherein, by providing the limit portion 221, the limit portion 221 can prevent the longitudinal beam 10 from escaping from the first slide groove 22, thereby improving the reliability of the connection between the cross beam 20 and the longitudinal beam 10.

[0049] In some embodiments of the present invention, Figure 7As shown, the two ends of the two limiting parts 221 facing each other are each provided with a hook part 222, and the hook part 222 cooperates with the limiting part 221 to define a slot opening toward the side wall of the first slide slot 22, and the upper and lower ends of the longitudinal beam 10 are each provided with a folding edge 11, and the folding edge 11 is matched in the slot. Therefore, through the cooperation of the folding edge 11, the cross beam 20 can be further prevented from being separated from the longitudinal beam 10, thereby further improving the reliability of the connection between the cross beam 20 and the longitudinal beam 10.

[0050] In some embodiments of the present invention, Figure 1-Figure 5 As shown, the torsion beam assembly 100 further includes: a shock absorber 40 and a shock absorbing spring 50, which are suitable for being connected between the end of the longitudinal beam 10 close to the wheel and the vehicle body. When the wheel is impacted and drives the longitudinal beam 10 to move up and down during the driving of the vehicle, the shock absorber 40 and the shock absorbing spring 50 can absorb a part of the impact force on the longitudinal beam 10, thereby improving the stability of the vehicle.

[0051] The vehicle according to the second embodiment of the present invention comprises: a vehicle body, wheels and the torsion beam assembly 100 according to the first embodiment of the present invention, wherein one end of the longitudinal beam 10 is connected to the wheel, and the other end of the longitudinal beam 10 is connected to the vehicle body.

[0052] During the driving process of the vehicle, according to the road conditions on which the vehicle is driving, the driving member 30 drives the cross beam 20 to move in the front-rear direction of the vehicle relative to the longitudinal beam 10, thereby adjusting the torsional stiffness of the torsion beam assembly 100, thereby improving the adaptability of the torsional stiffness of the torsion beam assembly 100 to the road conditions on which the vehicle is driving, and improving the driving experience of the occupants of the vehicle.

[0053] The vehicle according to the second embodiment of the present invention can improve the driving experience of the passengers in the vehicle by disposing the torsion beam assembly 100 according to the first embodiment of the present invention.

[0054] According to some embodiments of the present invention, Figure 1 and Figure 2 As shown, the vehicle further includes: a central domain controller, which is electrically connected to the driving member 30 via a CAN bus 60. During the driving process of the vehicle, various sensors on the vehicle detect the road conditions, and the central domain controller determines the road conditions according to the information transmitted by the various sensors, and then sends instructions to the driving member 30 via the CAN bus 60. The driving member 30 works according to the instructions, thereby realizing the control of the stiffness adjustment process of the torsion beam assembly 100.

[0055] The vehicle control method according to the third aspect of the present invention is applied to the vehicle according to the second aspect of the present invention, such as Figure 8 As shown, the control method includes:

[0056] S1. Detect the road condition of the vehicle.

[0057] During the driving process of the vehicle, the sensors on the vehicle can detect the road condition. For example, the road condition can be detected by radar, and the central domain controller determines the road condition based on the information transmitted by the radar. The road condition can also be detected by camera, and the central domain controller determines the road condition based on the information transmitted by the camera. The central domain controller can also determine the road condition based on the body angle sensor or the pressure sensor on the suspension.

[0058] S2. Control the driving member 30 to drive the cross beam 20 to move forward and backward according to the road condition.

[0059] When the vehicle is on a bumpy road, the central domain controller determines that the stiffness of the torsion beam assembly 100 needs to be reduced, and the central domain controller sends a command to the drive member 30, and the drive member 30 drives the cross beam 20 to move away from the wheel, thereby reducing the stiffness of the torsion beam assembly 100; when the vehicle is on a flat road, the central domain controller determines that the stiffness of the torsion beam assembly 100 needs to be increased, and the central domain controller sends a command to the drive member 30, and the drive member 30 drives the cross beam 20 to move toward the wheel, thereby increasing the stiffness of the torsion beam assembly 100.

[0060] After the driving component 30 drives the cross beam 20 to move, the sensors on the vehicle detect the driving state of the vehicle, and the central domain controller determines the driving state of the vehicle. If the comfort and stability of the vehicle are poor, the driving component 30 is controlled to continue to adjust the torsional stiffness of the torsion beam assembly 100. For example, when the body angle sensor detects that the shaking amplitude of the body is large, the driving component 30 is controlled to increase the torsional stiffness of the torsion beam assembly 100. If the body angle sensor detects that the frequency of the body vibration is high, the driving component 30 is controlled to reduce the torsional stiffness of the torsion beam assembly 100.

[0061] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0062] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0063] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0065] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A torsion beam assembly, characterized in that: include: A longitudinal beam, wherein the longitudinal beam extends in the front-rear direction of the vehicle, one end of the longitudinal beam is suitable for being connected to the wheel, and the other end of the longitudinal beam is suitable for being connected to the vehicle body, and the number of the longitudinal beams is two; A cross beam, the cross beam extending in the left-right direction of the vehicle, the left and right ends of the cross beam being respectively connected to the two longitudinal beams, and the cross beam being movable in the front-rear direction of the vehicle relative to the longitudinal beams; A driving member is connected to the cross beam, and the driving member is suitable for driving the cross beam to move forward and backward relative to the longitudinal beam.

2. The torsion beam assembly according to claim 1, characterized in that: The driving member is a driving motor having an output shaft on which an output gear is sleeved. The crossbeam is provided with a rack extending forward and backward on one side of the front-rear direction of the vehicle. The output gear meshes with the rack to drive the rack to move in the front-rear direction of the vehicle.

3. The torsion beam assembly according to claim 2, characterized in that: The output gear is a helical gear, and the teeth on the rack are helical teeth.

4. The torsion beam assembly according to claim 2, characterized in that: There are two driving members, and the two driving members are arranged at intervals in the left-right direction of the vehicle.

5. The torsion beam assembly according to claim 1, characterized in that: A first slide groove penetrating the cross beam front to back is formed on both left and right end faces of the cross beam, and a limiting portion is provided on both upper and lower side walls of the first slide groove, and the upper and lower ends of the longitudinal beam are matched between the limiting portion and the bottom wall of the first slide groove.

6. The torsion beam assembly according to claim 5, characterized in that: The two limiting parts have hooks at their facing ends, and the hooks cooperate with the limiting parts to define a slot opening toward the side wall of the first slide slot. The longitudinal beam has folded edges at both upper and lower ends, and the folded edges fit into the slot.

7. The torsion beam assembly according to claim 1, characterized in that: Also includes: A shock absorber and a shock absorbing spring, wherein the shock absorber and the shock absorbing spring are suitable for being connected between an end of the longitudinal beam close to the wheel and the vehicle body.

8. A vehicle, characterized in that: include: Car body; wheel; In the torsion beam assembly according to any one of claims 1 to 7, one end of the longitudinal beam is connected to the wheel, and the other end of the longitudinal beam is connected to the vehicle body.

9. The vehicle according to claim 8, characterized in that Also includes: A central domain controller is electrically connected to the driving element via a CAN bus.

10. A vehicle control method, applied to the vehicle according to claim 8 or 9, characterized in that: include: S1, detecting the road condition of the road on which the vehicle is located; S2. Control the driving member to drive the crossbeam to move forward and backward according to the road condition.

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