Active stabilizer bar, control method and vehicle

Abstract

The invention discloses an active stabilizer bar, a control method and a vehicle, and belongs to the technical field of vehicles, and the active stabilizer bar comprises a stabilizer bar main body which comprises two stabilizing arms and a bar body connected between the two stabilizing arms, and the axial direction of the bar body is used as the transverse direction; the base frame is provided with a mounting structure and two rotating seats, the mounting structure is used for being connected to a frame, the two ends of the rod body are rotationally arranged on the two rotating seats respectively, at least one rotating seat is a sliding part, and the base frame and the rod body are slidably connected with the sliding part in the transverse direction; the actuator is arranged on the base frame and used for driving the sliding piece to move transversely. The control method is applied to the active stabilizer bar. The vehicle comprises a control module, a sensor assembly and the active stabilizer bar. The stiffness of the stabilizer bar is adjusted by adjusting the span size, the force needing to be adjusted is small, and a driving motor with small power and small size can be selected as a power component of the actuator, so that the arrangement of the active stabilizer bar is facilitated.

Description

Technical Field

[0001] This invention relates to the field of vehicle technology, and in particular to an active stabilizer bar, a control method, and a vehicle. Background Technology

[0002] An active stabilizer bar adds an actuator to a traditional stabilizer bar. This actuator can actively change the stiffness of the stabilizer bar according to instructions from the vehicle's computer, thus controlling the vehicle's attitude more intelligently and proactively. Currently known active stabilizer bar actuator solutions mostly place a motor in the middle of the stabilizer bar. The motor's rotation drives the movement of the stabilizer bar ends, thereby generating force at the wheel ends, effectively altering the stiffness. Since the stabilizer bar force is generated by the motor's torque, the required motor size and current are relatively large. This makes the placement of a large motor difficult in the limited space of the engine compartment, hindering vehicle upgrades and increasing the cost and maintenance of the motor. Summary of the Invention

[0003] The present invention aims to at least solve the technical problems existing in the prior art, and proposes an active stabilizer bar, control method and vehicle, which can facilitate motor arrangement and facilitate the iterative upgrading of vehicles.

[0004] An active stabilizer bar according to a first aspect of the present invention includes: The stabilizer bar body includes two stabilizer arms and a bar body connected between the two stabilizer arms, with the axis of the bar body being transverse; The base frame is provided with a mounting structure and two rotating seats. The mounting structure is used to connect to the vehicle frame. The two ends of the rod are respectively rotatably disposed on the two rotating seats. At least one of the rotating seats is a sliding member. The base frame and the rod are respectively slidably connected to the sliding member in a transverse direction. An actuator, which is disposed on the base frame, is used to drive the slider to move laterally.

[0005] The active stabilizer bar according to the first aspect of the present invention has at least the following technical advantages: by setting at least one rotating seat as a sliding member and setting an actuator to drive the sliding member to adjust the lateral position of the sliding member, the active adjustment of the stabilizer bar span is realized, that is, the adjustment of the lateral distance between the end of the stabilizer arm and the sliding member is realized, thereby realizing stiffness adjustment. Since the stabilizer bar stiffness adjustment method of the present invention is to adjust the span size, the force required for adjustment is relatively small, and a drive motor with lower power and smaller size can be selected as the power component of the actuator, thereby facilitating the arrangement of the active stabilizer bar.

[0006] According to some embodiments of the present invention, both of the rotating seats are sliding members, and the actuator is used to drive the two sliding members to move closer to or further away from each other.

[0007] According to some embodiments of the present invention, the actuator includes a laterally extending bidirectional lead screw and a motor for driving the bidirectional lead screw to rotate. Nut components are threadedly connected to the left and right sides of the bidirectional lead screw, and two sliding members are connected to the two nut components in a one-to-one correspondence.

[0008] According to some embodiments of the present invention, the mounting structure includes two second mounting seats, and the two ends of the bidirectional lead screw are respectively rotatably connected to the two second mounting seats.

[0009] According to some embodiments of the present invention, the base frame is provided with a laterally extending slide rod, and the two rotating seats are respectively slidably connected to the slide rod; the mounting structure includes two first mounting seats, and the two ends of the slide rod are respectively connected to the two first mounting seats.

[0010] According to some embodiments of the present invention, the base frame is provided with a third mounting seat, the middle part of the slide rod and the middle part of the rod body are respectively connected to the third mounting seat, and the motor is provided on the third mounting seat.

[0011] According to some embodiments of the present invention, the rod body is disposed between the slide rod and the bidirectional lead screw.

[0012] According to some embodiments of the present invention, the lateral dimensions of both the slide rod and the bidirectional lead screw are larger than the lateral dimension of the rod body.

[0013] According to a second aspect of the present invention, an active stabilizer bar control method is applied to the above-described active stabilizer bar, the control method comprising the following steps: Acquire vehicle attitude information and / or road surface information; The actuator is controlled to drive the slider to move to a position that matches the vehicle posture information and / or the road surface information.

[0014] According to the second aspect of the present invention, the active stabilizer bar control method has at least the following technical effects: by acquiring vehicle posture information and / or road surface information, it determines whether the vehicle is turning or passing through a bumpy road section, makes a decision to increase or decrease the stiffness of the active stabilizer bar, and then controls the actuator to change the position of the sliding member to adapt to the current driving conditions.

[0015] According to a third aspect of the present invention, a vehicle includes a control module, a sensor assembly, and the aforementioned active stabilizer bar. The sensor assembly is used to acquire vehicle attitude information and / or road surface information. The control module is electrically connected to the sensor assembly and the actuator, respectively, to control the actuator to drive the slider to move to a position adapted to the vehicle attitude information and / or the road surface information.

[0016] The vehicle according to the third aspect of the present invention has at least the following technical effects: by setting the above-mentioned active stabilizer bar, a drive motor with lower power and smaller size can be selected as the power component of the actuator to adjust the stiffness of the stabilizer bar body, thereby facilitating the arrangement of the active stabilizer bar and benefiting the iterative upgrade of the vehicle.

[0017] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the active stabilizer bar according to an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram illustrating the calculation of the main body stiffness of the stabilizer bar in an embodiment of the present invention.

[0020] Figure 3 This is a flowchart of the control method according to an embodiment of the present invention.

[0021] In the attached image: 100-Slide rod; 110-First mounting base; 200-Double-actuated lead screw; 210-Second mounting base; 310-Rod body; 320-Stabilizing arm; 400-Third mounting base; 410-Motor; 420-Sliding component. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, "several" means one or more, "multiple" means two or more, "greater than," "less than," "exceeding," etc., are understood to exclude the stated number, while "above," "below," "within," etc., are understood to include the stated number. If "first" or "second" is used, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0024] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0025] The following is for reference. Figures 1 to 3 An active stabilizer bar, control method, and vehicle according to embodiments of the present invention are described.

[0026] An active stabilizer bar according to a first aspect of the present invention includes a stabilizer bar body, a base frame, and an actuator.

[0027] Reference Figure 1 The stabilizer bar body includes two stabilizer arms 320 and a bar body 310 connected between the two stabilizer arms 320. With the axis of the bar body 310 as the transverse direction, the stabilizer arm 320 located at the left end of the bar body 310 extends to the left rear side from the bar body 310, and the stabilizer arm 320 located at the right end of the bar body 310 extends to the right rear side from the bar body 310. The bar body 310 and the two stabilizer arms 320 are an integral component. The stabilizer bar body is made of high-rigidity spring steel and has strong elasticity to resist torsion. When the wheel moves up and down, causing the stabilizer arms 320 to move up and down, the bar body 310 is twisted, which generates a counterforce and reduces the degree of wheel movement.

[0028] Reference Figure 2 The calculation of the main stiffness of the stabilizer bar is shown in the following formula:

[0029] In the formula E —The elastic modulus of the material, in this embodiment ; G —The shear modulus of elasticity of the material, in this embodiment ; I Z —Moment of inertia of the stabilizer bar section about the neutral axis, ; I p —Polar moment of inertia of the stabilizer bar section, ; l 4—Lateral distance between the end of the stabilizer arm and the hinge point; Based on the calculation formula, the dimensions of the stabilizer bar can be derived. l The larger the value of 4, the greater the stiffness of the stabilizer bar. K The smaller.

[0030] The base frame is provided with an installation structure and two rotating seats. The installation structure is used to connect to the vehicle frame. The two ends of the rod 310 are respectively rotatably mounted on the two rotating seats. At least one rotating seat is a sliding member 420. The sliding member 420 is provided with a first sliding hole and a second sliding hole. The rod 310 passes through the first sliding hole, and the sliding rod 100 of the base frame passes through the second sliding hole. The base frame and the rod 310 are respectively slidably connected to the sliding member 420 in a transverse direction.

[0031] The actuator is mounted on the base frame and is used to drive the slider 420 to move laterally, thereby increasing or decreasing the lateral distance between the slider 420 and the end of the stabilizer arm 320, i.e., in the formula... l 4.

[0032] In this embodiment, the active stabilizer bar's main body is connected to the vehicle frame via two rotating seats. At least one rotating seat is configured as a sliding member 420, and an actuator drives the sliding member 420 to adjust its lateral position, thereby actively adjusting the stabilizer bar's span. This adjusts the lateral distance between the end of the stabilizer arm 320 and the sliding member 420, ultimately achieving stiffness adjustment. Since the stabilizer bar stiffness adjustment method of this invention involves adjusting the span dimension, the required adjustment force is relatively small. Therefore, a smaller, lower-powered drive motor can be selected as the actuator's power component, facilitating the arrangement of the active stabilizer bar. Furthermore, using a smaller, lower-powered drive motor also helps reduce costs and maintenance expenses.

[0033] In some embodiments of the present invention, both rotating seats are sliding members 420, and the actuator is used to drive the two sliding members 420 to move closer to or further away from each other. This way, when adjusting the stiffness of the stabilizer bar body, the lateral positions of the two sliding members 420 change simultaneously, resulting in a more balanced force on both sides of the stabilizer bar body and structural stability.

[0034] In some embodiments of the present invention, the actuator includes a laterally extending bidirectional lead screw 200 and a motor 410 for driving the bidirectional lead screw 200 to rotate. The left and right sides of the bidirectional lead screw 200 are respectively provided with threads of opposite directions. Nut components are threadedly connected to the left and right sides of the bidirectional lead screw 200, and the nut components can be ball nuts to reduce resistance. The left and right sides of the bidirectional lead screw 200 are arranged in a mirror-symmetrical manner, so that the two nut components move the same lateral distance when the bidirectional lead screw 200 rotates. Two sliding members 420 are connected to the two nut components one-to-one, so that each sliding member 420 can move together with the nut component it is connected to. Thus, a single motor 410 can drive the bidirectional lead screw 200 to rotate, thereby achieving the mutual approach or distance between the two sliding members 420, resulting in a simple structure and easy installation. The drive shaft of the electric motor 410 and the double-acting lead screw 200 can be linked together by a gear mechanism, coupling, sprocket mechanism or other suitable mechanism; the linkage method between the drive shaft of the electric motor 410 and the double-acting lead screw 200 is a conventional technical means in this field, and its specific structure will not be described in detail here.

[0035] In some embodiments of the present invention, the mounting structure includes two second mounting seats 210, and the two ends of the bidirectional lead screw 200 are respectively rotatably connected to the two second mounting seats 210. The second mounting seats 210 may be bearing seats, and the second mounting seats 210 may be mounted to the frame by bolt connection or other suitable connection methods; in this way, the bidirectional lead screw 200 is directly mounted to the frame, and the structure is stable.

[0036] In some embodiments of the present invention, the base frame is provided with a laterally extending slide rod 100, and two rotating seats are slidably connected to the slide rod 100 respectively; the mounting structure includes two first mounting seats 110, and the two ends of the slide rod 100 are respectively connected to the two first mounting seats 110. The slide rod 100 can be a smooth rod, and the end of the slide rod 100 can be fixedly connected to the first mounting seat 110. The first mounting seat 110 can be installed on the vehicle frame by bolt connection or other suitable connection methods; the slide rod 100 can withstand radial loads, which is beneficial to improving the stability of the lateral sliding of the sliding member 420. At the same time, the active stabilizer bar of the present invention can be assembled from several loose parts such as the slide rod 100, the bidirectional lead screw 200, and the motor 410, with a relatively simple internal structure and low cost for after-sales maintenance and replacement.

[0037] In some embodiments of the present invention, the base frame is provided with a third mounting base 400, and the middle part of the slide rod 100 and the middle part of the rod body 310 are respectively connected to the third mounting base 400. The motor 410 is provided on the third mounting base 400. The third mounting base 400 can be fixedly connected to the slide rod 100, or it can be connected to the vehicle frame; by providing the third mounting base 400, the arrangement of the motor 410 is facilitated.

[0038] In some embodiments of the present invention, the rod body 310 is disposed between the slide rod 100 and the double-acting lead screw 200. The slide rod 100, the rod body 310, and the double-acting lead screw 200 can be arranged sequentially from back to front at intervals. The middle part of the sliding member 420 is slidably connected to the rod body 310 through a first sliding hole, the rear part of the sliding member 420 is slidably connected to the slide rod 100 through a second sliding hole, and the front part of the sliding member 420 is connected to the double-acting lead screw 200 through a nut component. In this way, the slide rod 100 and the double-acting lead screw 200 can support the rod body 310 from both sides, which is beneficial to the stable connection between the rod body and the frame.

[0039] In some embodiments of the present invention, the lateral dimensions of the slide rod 100 and the bidirectional lead screw 200 are both larger than the lateral dimension of the rod body 310. This results in a larger span for the slide rod 100 and the bidirectional lead screw 200, leading to greater structural stability.

[0040] The active stabilizer bar control method of the second aspect of the present invention is applied to the above-described active stabilizer bar, with reference to... Figure 3 The control method includes the following steps: Step S100: Obtain vehicle attitude information and / or road surface information; In step S200, the actuator drives the slider 420 to move to a position that matches the vehicle attitude information and / or road surface information.

[0041] Under normal driving conditions, people prefer a lower stabilizer bar stiffness when cruising in a straight line or when one wheel is driving over a bump, allowing the left and right wheels to move independently and providing optimal comfort and tire grip. Conversely, a higher stabilizer bar stiffness is desired when cornering or changing lanes to suppress body roll and improve stability. Therefore, this embodiment uses vehicle posture information and / or road surface information to determine whether the vehicle is cornering or traversing a bumpy road section, making a decision to increase or decrease the stiffness of the active stabilizer bar. This decision then controls the actuator to change the position of the sliding member 420 to adapt to the current driving conditions. Specifically, when the active stabilizer bar stiffness needs to be increased, the actuator can drive both sliding members 420 to move outwards simultaneously; when the active stabilizer bar stiffness needs to be decreased, the actuator can drive both sliding members 420 to move inwards simultaneously.

[0042] The vehicle according to a third aspect embodiment of the present invention includes a control module, a sensor assembly, and the aforementioned active stabilizer bar. The sensor assembly is used to acquire vehicle attitude information and / or road surface information. The control module is electrically connected to both the sensor assembly and the actuator to control the actuator to drive the sliding member 420 to move to a position adapted to the vehicle attitude information and / or road surface information. By setting the aforementioned active stabilizer bar, a drive motor with lower power and smaller size can be selected as the power component of the actuator to adjust the stiffness of the stabilizer bar body, thereby facilitating the arrangement of the active stabilizer bar and benefiting vehicle iterative upgrades.

[0043] The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of the present invention, and these equivalent modifications or substitutions are all included within the scope defined by the claims of this application.

Claims

1. An active stabilizer bar, characterized in that, include: The stabilizer bar body includes two stabilizer arms and a bar body connected between the two stabilizer arms, with the axis of the bar body being transverse; The base frame is provided with a mounting structure and two rotating seats. The mounting structure is used to connect to the vehicle frame. The two ends of the rod are respectively rotatably disposed on the two rotating seats. At least one of the rotating seats is a sliding member. The base frame and the rod are respectively slidably connected to the sliding member in a transverse direction. An actuator, which is disposed on the base frame, is used to drive the slider to move laterally.

2. The active stabilizer bar according to claim 1, characterized in that: Both of the rotating seats are sliding members, and the actuator is used to drive the two sliding members to move closer to each other or further apart.

3. The active stabilizer bar according to claim 2, characterized in that: The actuator includes a laterally extending bidirectional lead screw and a motor for driving the bidirectional lead screw to rotate. Nut components are threadedly connected to the left and right sides of the bidirectional lead screw, and the two sliding parts are connected to the two nut components in a one-to-one correspondence.

4. The active stabilizer bar according to claim 3, characterized in that: The mounting structure includes two second mounting seats, and the two ends of the bidirectional lead screw are respectively rotatably connected to the two second mounting seats.

5. The active stabilizer bar according to claim 3, characterized in that: The base frame is provided with a laterally extending slide rod, and the two rotating seats are slidably connected to the slide rod respectively; the mounting structure includes two first mounting seats, and the two ends of the slide rod are respectively connected to the two first mounting seats.

6. The active stabilizer bar according to claim 5, characterized in that: The base frame is provided with a third mounting base, the middle part of the slide rod and the middle part of the rod body are respectively connected to the third mounting base, and the motor is located on the third mounting base.

7. The active stabilizer bar according to claim 5, characterized in that: The rod body is located between the slide rod and the bidirectional lead screw.

8. The active stabilizer bar according to claim 5, characterized in that: The lateral dimensions of both the slide rod and the bidirectional lead screw are larger than the lateral dimension of the rod body.

9. An active stabilizer bar control method, characterized in that: Applied to the active stabilizer bar as described in any one of claims 1 to 8, the control method includes the following steps: Acquire vehicle attitude information and / or road surface information; The actuator is controlled to drive the slider to move to a position that matches the vehicle posture information and / or the road surface information.

10. A vehicle, characterized in that: The device includes a control module, a sensor assembly, and an active stabilizer bar as described in any one of claims 1 to 8. The sensor assembly is used to acquire vehicle attitude information and / or road surface information. The control module is electrically connected to the sensor assembly and the actuator, respectively, to control the actuator to drive the slider to move to a position adapted to the vehicle attitude information and / or the road surface information.

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