Integrated active seat suspension structure
By using a parallel actuator with joint motor and rotating magnetorheological damper in the seat suspension, the problem that traditional seat suspension systems cannot effectively deal with complex vibration modes under dynamic driving conditions is solved, and the vibration damping effect of low energy consumption, high performance and fail-safety is achieved.
Patent Information
- Application Number
- CN202510208207.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-24
- Publication Date
- 2025-04-25
AI Technical Summary
When facing dynamic driving conditions, traditional seat suspension systems cannot effectively deal with complex vibration modes, and the active seat suspension systems have problems such as high power consumption and inability to ensure passenger safety when they are faulty.
The integrated active seat suspension structure is adopted, including a parallel actuator of joint motor and rotary magnetorheological damper, and the rotary magnetorheological damper provides the main damping torque through the rotary magnetorheological damper. The joint motor supplements insufficient output torque to achieve low energy consumption and efficient vibration reduction.
It achieves low energy consumption, low cost and high performance vibration damping effects, and is also fail-safe, and can continue to provide vibration damping functions when joint motors fail to ensure passenger safety.
Smart Images
Figure CN119872369A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of active seat suspension vibration control, in particular to an integrated active seat suspension structure. Background Art
[0002] With the rapid development of the automobile industry and intelligent technology, ride comfort has become one of the important factors for consumers to choose vehicles. As a key component of the in-vehicle comfort system, seat suspension directly affects the comfort of passengers. When driving at high speeds or under complex road conditions, the vibration and impact of the seat will be transmitted to the body of the occupants, causing discomfort and even affecting health. Therefore, how to effectively reduce the vibration of the seat and improve ride comfort has become an urgent problem to be solved in the field of automotive seat design. Traditional seat suspension systems mostly use passive vibration reduction technology, such as springs, dampers and other devices, to achieve vibration reduction through physical means. However, these passive suspension systems have the disadvantages of being unable to change suspension parameters according to road conditions and limited vibration reduction effects. Especially when facing dynamic driving conditions, they cannot effectively cope with complex vibration modes. With the continuous development of technology, active and semi-active seat suspension technologies are gradually emerging.
[0003] Semi-active seat suspension usually adopts rotary magnetorheological damper, which improves the vibration reduction ability of seat suspension by controlling the damping torque of the damper. It has low power consumption but is not as comfortable as active seat suspension.
[0004] Active seat suspension usually uses active actuators such as servo motors, hydraulic devices, and pneumatic devices. It detects the vibration of the seat and the movement of the vehicle body in real time, and uses an intelligent control system to drive the seat suspension to make rapid adjustments to adapt to the vibration environment under different working conditions, thereby improving comfort. However, the active seat suspension system still has the disadvantages of high power consumption and inability to ensure passenger safety when the active system fails.
[0005] The corresponding shortcomings of semi-active and active seat suspensions have greatly reduced their practicality and have not been widely used. Summary of the invention
[0006] The object of the present invention is to provide an integrated active seat suspension structure to solve the problems raised in the above background technology.
[0007] To achieve the above object, the present invention provides the following technical solutions:
[0008] An integrated active seat suspension structure includes a suspension top frame, a fixed rod, a spring, an inner fork arm, an outer fork arm, a seat suspension bottom frame, a bearing and a motion rod, and also includes an integrated actuator. The integrated actuator includes a joint motor and a rotating magnetorheological damper. The joint motor and the rotating magnetorheological damper are installed in a stacked manner. The stator of the joint motor is fixed to the stator of the rotating magnetorheological damper to form the stator of the actuator, and the rotor of the joint motor is fixed to the rotor of the rotating magnetorheological damper to form the rotor of the actuator.
[0009] As a preferred solution of the present invention: the joint motor and the rotary magnetorheological damper are installed in a mutually nested manner.
[0010] As a further preferred solution of the present invention: the stator of the actuator is fixed to the outer fork arm, and the rotor is fixed to the inner fork arm.
[0011] As a further preferred solution of the present invention: the top frame of the suspension is connected to the seat cushion; the bottom frame is installed inside the vehicle and fixed to the vehicle body.
[0012] As a further preferred solution of the present invention: the fixed rod is fixed to the top frame of the suspension, the moving rod is connected to the top frame of the suspension by a bearing, and the moving rod can move linearly along the X-axis direction.
[0013] As a further preferred solution of the present invention: a spring is installed between the fixed rod and the movement rod to provide rigidity for the seat suspension.
[0014] As a further preferred embodiment of the present invention: the upper end of the inner fork arm is fixed to the fixing rod, and further fixed to the top frame of the suspension; the lower end of the inner fork arm is connected to the bottom frame of the seat suspension through a bearing, and the lower end can move linearly along the X-axis direction.
[0015] As a further preferred embodiment of the present invention: the upper end of the outer fork arm is fixed to the motion rod, and the upper end can move linearly along the X-axis direction; the lower end of the outer fork arm is fixed to the bottom frame of the seat suspension; the inner fork arm and the outer fork arm form a scissor structure.
[0016] Compared with the prior art, the present invention has the following beneficial effects:
[0017] 1. Low energy consumption - In the active resistance mode, the integrated active seat suspension can use the rotating magnetorheological damper to generate damping torque for vibration reduction, and the joint motor only needs to supplement the insufficient output torque. In this mode, the torque provided by the joint motor is small or does not work. Compared with the traditional active seat suspension that uses active actuators completely, the system energy consumption is greatly reduced.
[0018] 2. Low cost - The integrated active seat suspension uses a rotary magnetorheological damper that can provide a larger damping torque, so the integrated actuator composed of joint motors with a smaller rated torque and lower cost can still achieve excellent vibration reduction effects, and the overall system cost is reduced.
[0019] 3. Excellent performance - Due to the use of the parallel mechanism of the joint motor and the rotating magnetorheological damper, the dynamic adjustment torque range of the actuator is larger, which can enable the system to achieve better vibration reduction effect and improve passenger comfort.
[0020] 4. Fail-safe - Compared with the traditional active seat suspension, which cannot continue to provide vibration reduction function when the active actuator fails, the integrated active seat suspension is equipped with a rotating magnetorheological damper. When the joint motor fails, it can continue to fully control the magnetorheological damper to provide vibration reduction, making the system fail-safe and ensuring passenger safety. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 It is a schematic diagram of the stacking installation structure of the integrated active seat suspension actuator;
[0022] Figure 2 It is a schematic diagram of the nested installation structure of the integrated active seat suspension actuator;
[0023] In the figure: 1. Suspension top frame, 2. Fixed rod, 3. Spring, 4. Inner fork arm, 5. Outer fork arm, 6. Joint motor, 7. Rotary magnetorheological damper, 8. Seat suspension bottom frame, 9. Bearing, 10. Sport rod. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0025] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0027] Embodiment 1:
[0028] See also Figure 1 In an embodiment of the present invention, an integrated active seat suspension structure includes a suspension top frame 1, a fixed rod 2, a spring 3, an inner fork arm 4, an outer fork arm 5, a seat suspension bottom frame 8, a bearing 9 and a motion rod 10, and also includes an integrated actuator, the integrated actuator includes a joint motor 6 and a rotating magnetorheological damper 7, the joint motor 6 and the rotating magnetorheological damper 7 are installed in a stacking manner, the stator of the joint motor 6 and the stator of the rotating magnetorheological damper 7 are fixed to form the stator of the actuator, and the rotor of the joint motor 6 and the rotor of the rotating magnetorheological damper 7 are fixed to form the rotor of the actuator.
[0029] Specifically, the stator of the actuator is fixed to the outer fork arm 5, and the rotor is fixed to the inner fork arm 4;
[0030] The suspension top frame 1 is connected to the seat cushion, and the passenger sits on the seat cushion; the bottom frame 8 is installed inside the vehicle and fixed to the vehicle body;
[0031] The fixed rod 2 is fixed to the top frame 1 of the suspension, and the moving rod 10 is connected to the top frame 1 of the suspension by means of a bearing 9, and the moving rod 10 can move linearly along the X-axis direction;
[0032] A spring is installed between the fixed rod 10 and the motion rod 2 to provide stiffness for the seat suspension;
[0033] The upper end of the inner fork arm 4 is fixed to the fixing rod 2, and further fixed to the top frame 1 of the suspension; the lower end of the inner fork arm 4 is connected to the bottom frame 8 of the seat suspension through a bearing 9, and the lower end can move linearly along the X-axis direction;
[0034] The upper end of the outer fork arm 5 is fixed to the motion rod 10, and the upper end can move linearly along the X-axis direction; the lower end of the outer fork arm 5 is fixed to the bottom frame 8 of the seat suspension; further, the inner fork arm 4 and the outer fork arm 5 form a scissor structure;
[0035] The relative displacement between the top frame 1 and the bottom frame 8 of the suspension in the Z-axis direction will be converted into the rotation angle of the actuator through the scissor structure; the output torque of the actuator is converted into the active force in the Z-axis direction of the active seat suspension;
[0036] The output torque of the actuator and the active force in the Z-axis direction of the active seat suspension satisfy a certain mathematical relationship, and the relationship includes the length parameters of the inner fork arm 4 and the outer fork arm 5, the size parameters of the seat bottom frame 8, and the height parameters between the top frame 1 and the bottom frame 8;
[0037] The motion rod 10 will move along the X-axis direction, and the spring 3 between the fixed rod 2 and the motion rod 10 will be stretched to provide stiffness for the seat suspension.
[0038] The working principle of the present invention is: the integrated active seat suspension proposed in the present invention uses a joint motor 6 and a rotating magnetorheological damper 7 in parallel to form an actuator. The integrated active seat suspension has four modes: energy feeding, active thrust, active resistance, and fault safety. The control mode is adjusted according to road conditions and different system states.
[0039] The integrated active seat suspension has four working modes: energy feeding mode, active thrust mode, active resistance mode, and fail-safe mode.
[0040] Energy feeding mode: When the integrated active seat suspension is in a vibrating state, the vibration stroke is converted into the rotation angle of the stator and rotor on the scissor structure, driving the internal coil of the motor to cut the magnetic flux lines and generate electrical energy, which can be recovered.
[0041] Active thrust mode: When the output torque required by the seat suspension actuator is in the same direction as the rotation direction of the scissor structure during vibration, the required output torque is provided by the joint motor. At this time, in order to reduce the resistance in the opposite direction generated by the actuator, the damping coefficient of the rotary magnetorheological damper should be adjusted to the minimum to minimize the damping torque in the opposite direction.
[0042] Active resistance mode: When the output torque required by the seat suspension actuator is opposite to the rotation direction of the scissor structure during vibration, most of the required output torque is provided by the magnetorheological suspension damper, and the unsatisfied output torque is provided by the joint motor. In this mode, the joint motor only needs to provide a small output torque or not work. The rotating magnetorheological damper can generate a large damping torque with very little power consumption, so in this working mode, the power consumption of the integrated system will be significantly reduced compared to using traditional active seat suspension.
[0043] Fail-safe mode: When an active actuator in the integrated active seat suspension fails, the function of the rotating magnetorheological damper can continue to be fully used. Combined with a semi-active control algorithm to control the magnetorheological damper, the system can still provide vibration reduction for passengers to ensure passenger safety.
[0044] When passing over bumpy roads, the amplitude of the road surface will be transmitted to the cab through the vehicle suspension, and then transmitted to the passenger's body through the seat suspension. Vibrations with a frequency between 1Hz and 5Hz often make passengers feel uncomfortable, and long-term exposure to this riding environment will also cause irreversible damage to the passenger's body. The use of state-controllable active seat suspension can effectively reduce the vibration acceleration transmitted to the passenger's body. When the integrated active seat suspension works in the energy feeding mode, the rotating magnetorheological damper 7 does not work. At this time, the movement of the seat suspension in the Z-axis direction is transmitted to the joint motor 6 through the scissor structure. The internal coil cuts the magnetic flux lines to generate electrical energy. The system converts the mechanical energy generated by the vibration into electrical energy and stores energy for subsequent vibration system control. When the system works in the active thrust mode, the output torque direction required by the integrated seat suspension actuator is the same as the rotation direction of the scissor structure during vibration. At this time, the output torque of the actuator is mainly generated by the joint motor 6. In order to reduce the feedback generated by the actuator Directional resistance, at this time, the damping coefficient of the rotating magnetorheological damper 7 should be adjusted to the minimum, so that the directional damping torque generated by the actuator is adjusted to the minimum, reducing the energy consumption of the system; when the system works in the active resistance mode, the output torque direction required by the integrated seat suspension actuator is opposite to the rotation direction of the scissor structure during vibration. At this time, the output torque required by the system is mainly provided by the rotating magnetorheological damper 7, and the part of the output torque that cannot be met is provided by the joint motor 6. At this time, the joint motor 6 only needs to provide a very small output torque or not work, which greatly reduces the energy consumption of the system; and when the joint motor 6 fails, the integrated active seat suspension switches to the fail-safe mode, and the system will be completely converted to the control of the rotating magnetorheological damper 7. Even if the joint motor 6 fails to work, the system can continue to provide vibration reduction function for passengers to ensure passenger safety; the vibration reduction of the integrated active seat suspension in four modes brings comfort to passengers while reducing the power consumption of the active vibration reduction system and improving passenger safety.
[0045] Embodiment 2:
[0046] like Figure 2 As shown, the joint motor 6 and the rotating magnetorheological damper 7 are installed in a nested manner, the stator of the joint motor 6 and the stator of the rotating magnetorheological damper 7 are fixed to form the stator of the actuator, and the rotor of the joint motor 6 and the rotor of the rotating magnetorheological damper 7 are fixed to form the rotor of the actuator.
[0047] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.
[0048] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.
Claims
1. An integrated active seat suspension structure, comprising a suspension top frame (1), a fixing rod (2), a spring (3), an inner fork arm (4), an outer fork arm (5), a seat suspension bottom frame (8), a bearing (9) and a motion rod (10), characterized in that: The invention also comprises an integrated actuator, wherein the integrated actuator comprises a joint motor (6) and a rotating magnetorheological damper (7), wherein the joint motor (6) and the rotating magnetorheological damper (7) are installed in a superimposed manner or nested with each other, wherein the stator of the joint motor (6) and the stator of the rotating magnetorheological damper (7) are fixed to form the stator of the actuator, and the rotor of the joint motor (6) and the rotor of the rotating magnetorheological damper (7) are fixed to form the rotor of the actuator; The stator of the actuator is fixed to the outer fork arm (5), and the rotor is fixed to the inner fork arm (4); The fixed rod (2) is fixed to the top frame (1) of the suspension, the moving rod (10) is connected to the top frame (1) of the suspension by means of a bearing (9), and the moving rod (10) can move linearly along the X-axis direction; The upper end of the inner fork arm (4) is fixed to the fixing rod (2), and further fixed to the top frame (1) of the suspension; the lower end of the inner fork arm (4) is connected to the bottom frame (8) of the seat suspension via a bearing (9), and the lower end can move linearly along the X-axis direction.
2. The integrated active seat suspension structure according to claim 1, characterized in that: The suspension top frame (1) is connected to the seat cushion; the bottom frame (8) is installed inside the vehicle and fixed to the vehicle body.
3. The integrated active seat suspension structure according to claim 2, characterized in that: A spring is installed between the fixed rod (10) and the movement rod (2) to provide rigidity for the seat suspension.
4. The integrated active seat suspension structure according to claim 3, characterized in that: The upper end of the outer fork arm (5) is fixed to the motion rod (10), and the upper end can move linearly along the X-axis direction; the lower end of the outer fork arm (5) is fixed to the bottom frame (8) of the seat suspension; and the inner fork arm (4) and the outer fork arm (5) form a set of scissor-type structures.