Low-frequency vibration suppression semi-active inerter seat suspension system

Abstract

The invention belongs to the technical field of vehicle seat vibration reduction, and discloses a low-frequency vibration suppression semi-active inerter seat suspension system which comprises an inerter module, a damper module and a spring module which form parallel support for a seat. The inerter module adopts an electromagnetic clutch type inerter, the damper module adopts a magneto-rheological linear cylinder type damper, and the spring module adopts a spiral spring. The seat comprises a base and a cushion, and a vibration reduction space used for installing the inerter module, the damper module and the spring module is formed between the base and the cushion. And the parallel support adopts a balance support which is distributed in a triangular shape, so that the inerter module, the damper module and the spring module form a triangular support area in the vibration reduction space. The inertial container and the damper are integrated into a seat suspension system in a parallel connection structure, and a vibration reduction structure with the dual functions of low-frequency inertial vibration isolation and medium-high frequency adjustable dissipation is formed.

Description

Technical Field

[0001] The present invention belongs to the technical field of vehicle seat vibration reduction, and in particular relates to a low-frequency vibration suppression semi-active inertia seat suspension system. Background Art

[0002] Traditional vehicle seat suspension systems rely on mechanical springs and passive dampers to achieve basic vibration isolation. Due to their limited natural frequency, these structures cannot flexibly adapt to vibration control requirements across different frequency bands. Springs cannot effectively isolate vibrations at low frequencies, while passive dampers have limited energy dissipation capabilities at mid- and high-frequency ranges. This makes it difficult to meet the comprehensive requirements for seat vibration comfort, stability, and safety, particularly in complex road conditions or specialized working environments.

[0003] In recent years, researchers have begun exploring the use of inertia devices (Inerters) to expand vibration control capabilities. Inerters can generate equivalent inertial forces through relative acceleration response, effectively improving low-frequency vibration isolation performance. However, inerters themselves lack energy dissipation capabilities and are unable to cope with medium- and high-frequency vibrations. Magneto-rheological (MR) dampers, on the other hand, are widely used in active and semi-active vibration reduction applications at medium and high frequencies due to their adjustable damping force and fast response speed. Therefore, it is particularly necessary to integrate the functions of these two devices into a semi-active composite structure and design a semi-active seat suspension structure with strong low-frequency vibration suppression capabilities, modular structure, and good adaptability. Summary of the Invention

[0004] In view of this, and to address the issues raised in the above background technology, the present invention aims to provide a low-frequency vibration-suppressing semi-active inertial seat suspension system, which achieves a composite vibration isolation effect for vibrations of different frequencies by combining an inertial container module and a magnetorheological damper module in parallel.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A low-frequency vibration suppression semi-active inertia seat suspension system comprises an inertia container module, a damper module and a spring module forming parallel support for the seat.

[0007] Preferably, the inertia container module adopts an electromagnetic clutch inertia container, the damper module adopts a magnetorheological linear cylinder damper, and the spring module adopts a coil spring.

[0008] Preferably, the seat includes a base and a seat cushion, and a vibration-damping space for installing the inertia container module, the damper module and the spring module is formed between the base and the seat cushion.

[0009] Preferably, both ends of the inertia container module and the damper module are installed through a hinged component, and the hinged component includes a first hinged part and a second hinged part that are rotatably connected. The first hinged part is fixedly connected to the inertia container module or the damper module by bolts, and the second hinged part is fixedly connected to the base or the seat cushion by bolts.

[0010] Preferably, the parallel support adopts a balanced support distributed in a triangular shape, so that the inertia container module, the damper module and the spring module form a triangular support area in the vibration reduction space.

[0011] Preferably, the center of the seat cushion and the center of the inscribed circle of the triangular support area are located on the same vertical axis.

[0012] Preferably, the distance between the front side of the seat cushion and the front side of the triangular support area is not less than the distance between the rear side of the seat cushion and the rear side of the triangular support area.

[0013] Preferably, the inertia container module and the damper module are located on the front support side of the triangular support area, and the spring module is located on the rear support side of the triangular support area.

[0014] Preferably, the inertia container module and the damper module are symmetrically distributed on both sides of the spring module.

[0015] Preferably, the triangular support area is an equilateral triangle.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] In this invention, the parallel arrangement of an inertia chamber and magnetorheological damper modules effectively expands the seat's vibration isolation frequency band. The inertia chamber primarily isolates low-frequency vibrations, while controllable damping dissipates high-frequency energy. This achieves both low-frequency inertial vibration suppression and high-frequency energy dissipation. Independent coil springs provide additional support and high-frequency vibration isolation, ensuring excellent vibration isolation across all vibration frequencies. The integrated vibration-damping suspension system, installed between the seat cushion and base, offers a compact and easy-to-install structure. Each component can be independently optimized without interfering with each other, facilitating maintenance and module replacement while achieving superior vibration reduction compared to simple serial or nested configurations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A perspective view of the present invention;

[0019] Figure 2 This is a schematic structural diagram of the cooperation between the inertia container module, the damper module and the spring module in one embodiment of the present invention;

[0020] Figure 3 This is a schematic structural diagram of the cooperation between the inertia container module, the damper module and the spring module in another embodiment of the present invention;

[0021] Figure 4 This is a schematic structural diagram of the cooperation between the inertia container module, the damper module and the spring module in another embodiment of the present invention;

[0022] Figure 5 for Figure 1 A magnified view of point A in the figure;

[0023] In the figure: seat 10; base 11; cushion 12; inertia chamber module 20; damper module 30; spring module 40; hinge member 50; first hinge part 51; second hinge part 52. DETAILED DESCRIPTION

[0024] To further understand the content of the present invention, the present invention is described in detail in conjunction with the accompanying drawings and embodiments. The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the content disclosed in the specification, so that people familiar with the technology can understand and read them. They are not used to limit the limitations of the implementation of the present invention and therefore have no technical significance. Any structural modifications, changes in proportional relationships, or adjustments in size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and objectives that can be achieved by the present invention. At the same time, terms such as "upper", "lower", "left", "right", and "middle" used in this specification are only for ease of description and are not used to limit the scope of implementation. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content. It should be noted that the terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way are interchangeable where appropriate for the embodiments of the present application described herein.

[0025] like Figure 1 As shown, the present invention provides a low-frequency vibration-suppressing semi-active inertia seat suspension system that provides parallel support for a seat 10. In the figure, the seat 10 includes a base 11 and a seat cushion 12, with a vibration-damping space formed between the base 11 and the seat cushion 12 for mounting the suspension system.

[0026] Continue to refer Figure 1 As shown, the suspension system includes an inertia chamber module 20, a damper module 30, and a spring module 40. Specifically, the inertia chamber module 20 is an electromagnetic clutch inertia chamber, the damper module 30 is a magnetorheological linear cylinder damper, and the spring module 40 is a coil spring.

[0027] Continue to refer Figure 5As shown, both ends of the inertia container module 20 and the damper module 30 are mounted via hinged members 50. The hinged members 50 include a first hinge portion 51 and a second hinge portion 52 that are rotatably connected. The first hinge portion 51 is fixedly connected to the inertia container module 20 or the damper module 30 by bolts, and the second hinge portion 52 is fixedly connected to the base 11 or the seat cushion 12 by bolts. This allows the inertia container module 20 and the damper module 30 to be flexibly adapted to bases 11 or seat cushions 12 installed at different angles, while ensuring that the inertia container module 20 and the damper module 30 always remain in a vertical position. (The present invention prioritizes the main excitation direction in the human body-seat system, i.e., vertical vibration. By arranging the vibration reduction unit in the vertical force transmission channel, its inertial vibration suppression and damping dissipation response capabilities can directly act on the human body's sensitive vibration path, maximizing the vibration reduction effect.) In addition, both ends of the spring module 40 are welded and fixed to the base 11 and the seat cushion 12 respectively. The elastic deformation of the spring module 40 can flexibly adapt to different installation angles of the base 11 or the seat cushion 12.

[0028] (1) For the three vibration-damping components described above, the present invention optionally employs triangularly distributed balanced supports for the parallel support, so that the inertia chamber module 20, damper module 30, and spring module 40 form a triangular support area within the vibration-damping space. Specifically, one inertia chamber module 20, one damper module 30, and one spring module 40 are each provided, located at the three corners of the triangular support area.

[0029] Regarding the above triangular balance support, in an executable embodiment of the present invention, the triangular support area is presented as Figure 2 To ensure stable support of the seat 10 by the suspension system, the center of the seat cushion 12 and the center of the inscribed circle of the triangular support area are preferably located on the same vertical axis, thereby effectively ensuring the balance of the overall support and improving comfort and adaptability.

[0030] Regarding the above triangular balance support, in another executable embodiment of the present invention, the triangular support area is presented as Figure 3 Similarly, ensure that the center of the seat cushion 12 and the center of the inscribed circle of the triangular support area are located on the same vertical axis.

[0031] In this embodiment, the seat 10 also includes a backrest assembly connected to the rear side of the seat cushion 12. The backrest assembly includes a headrest and a backrest board: the backrest board is connected to the seat cushion 12 via a rotating shaft with an adjustable rotation angle to achieve adjustment of the backrest angle and fixed positioning; the headrest is connected to the backrest board via a movable guide structure to achieve adjustment of the headrest height and fixed positioning. Under this structure, the weight of the rear side of the seat cushion 12 is greater than that of the front side of the seat cushion 12, so the triangular support area is preferably set to Figure 3As shown in the isosceles triangle, the length of side c of the isosceles triangle is less than the length of side a / b, thereby making the distance L1 between the front side of the seat cushion 12 and the front side of the triangular support area support greater than the distance L2 between the rear side of the seat cushion 12 and the rear side of the triangular support area support, thereby also ensuring that the inertia container module 20, the damper module 30 and the spring module 40 can form a stable and balanced support for the seat 10.

[0032] Regarding the above triangular balance support, in an executable embodiment of the present invention, the triangular support area is presented as Figure 4 Similarly, ensure that the center of the seat cushion 12 and the center of the inscribed circle of the triangular support area are located on the same vertical axis.

[0033] In this embodiment, the lengths of sides a, b, and c of the equilateral triangle are equal, so that the distance L1 between the front side of the seat cushion 12 and the front side of the triangular support area is equal to the distance L2 between the rear side of the seat cushion 12 and the rear side of the triangular support area. This ensures that the inertia container module 20, the damper module 30, and the spring module 40 can form a stable and balanced support for the seat 10.

[0034] Specifically, in the three executable embodiments described above, the inertial vessel module 20 and damper module 30 are located on the front support side of the triangular support area, while the spring module 40 is located on the rear support side of the triangular support area. Furthermore, in both the isosceles triangle support area and the equilateral triangle support area, the inertial vessel module 20 and damper module 30 are symmetrically distributed on either side of the spring module 40.

[0035] In summary, connecting the inertia chamber module 20 and the damper module 30 in parallel to the base 11 and seat cushion 12 creates a dual-channel vibration response path, thereby developing a frequency-selective vibration damping characteristic curve. For example, at a specific excitation frequency, the negative acceleration response of the inertia chamber module 20 can offset the spring force of the spring module 40, creating a "zero stiffness" effect. Simultaneously, the damper module 30 increases the system's equivalent damping through closed-loop control, ultimately achieving "intelligent soft vibration isolation." The parallel structure allows the two modules to operate independently but synergistically without interfering with each other, resulting in a wider vibration isolation band and more adaptive vibration damping performance. This arrangement not only facilitates occupant leg movement and avoids interference, but also enhances the seat's responsiveness to multi-directional vibrations and structural stability. This significantly suppresses and dissipates vibrations in the 0.5-30 Hz frequency range of the seat 10, effectively improving ride comfort and impact resistance.

[0036] (2) For the three vibration-damping components described above, the present invention optionally employs a quadrilaterally distributed balanced support system for the parallel support. This allows the inertial vessel module 20, damper module 30, and spring module 40 to form a quadrilateral support area within the vibration-damping space (not shown). Specifically, one inertial vessel module 20 and one damper module 30 are provided, and two spring modules 40 are provided, located at the four corners of the quadrilateral support area.

[0037] For the above-mentioned quadrilateral support area, in order to ensure stable support of the suspension system to the seat 10, it is preferred that the center of the seat cushion 12 and the center of the inscribed circle of the quadrilateral support area are located on the same vertical axis, so as to effectively ensure the balance of the overall support and improve comfort and adaptability.

[0038] In this embodiment, the length of the quadrilateral support area is adjusted according to the length of the four side edges of the seat cushion 12 to ensure that the four sides of the quadrilateral support area are parallel to the four side edges of the seat cushion 12, and at the same time, the length ratio of the four sides of the quadrilateral support area is equal to the length ratio of the four side edges of the seat cushion 12.

[0039] In this embodiment, the inertia chamber module 20 and the damper module 30 are located on the front support side of the quadrilateral support area, while the two spring modules 40 are located on the rear support side of the quadrilateral support area. Furthermore, the distance between the front side of the seat cushion 12 and the front support side of the quadrilateral support area is ensured to be no less than the distance between the rear side of the seat cushion 12 and the rear support side of the quadrilateral support area. This ensures that the suspension system of the present invention provides stable and effective vibration-damping support for the seat 10.

[0040] Note that the above are only preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A low-frequency vibration suppression semi-active inertia seat suspension system, characterized in that: It comprises an inertia container module (20), a damper module (30) and a spring module (40) which form parallel support for the seat (10).

2. The low-frequency vibration suppression semi-active inertia seat suspension system according to claim 1, characterized in that: The inertia container module (20) adopts an electromagnetic clutch inertia container, the damper module (30) adopts a magnetorheological linear cylinder damper, and the spring module (40) adopts a coil spring.

3. The low-frequency vibration suppression semi-active inertia seat suspension system according to claim 1, characterized in that: The seat (10) comprises a base (11) and a seat cushion (12), and a vibration-damping space for installing an inertia container module (20), a damper module (30), and a spring module (40) is formed between the base (11) and the seat cushion (12).

4. The low-frequency vibration suppression semi-active inertia seat suspension system according to claim 1, characterized in that: Both ends of the inertia container module (20) and the damper module (30) are mounted via a hinged member (50), and the hinged member (50) includes a first hinged portion (51) and a second hinged portion (52) that are rotatably connected, the first hinged portion (51) being fixedly connected to the inertia container module (20) or the damper module (30) via bolts, and the second hinged portion (52) being fixedly connected to the base (11) or the seat cushion (12) via bolts.

5. The low-frequency vibration suppression semi-active inertia seat suspension system according to claim 3, characterized in that: The parallel support adopts a balanced support distributed in a triangular shape, so that the inertia container module (20), the damper module (30) and the spring module (40) form a triangular support area in the vibration reduction space.

6. The low-frequency vibration suppression semi-active inertia seat suspension system according to claim 5, characterized in that: The center of the seat cushion (12) and the center of the inscribed circle of the triangular support area are located on the same vertical axis.

7. The low-frequency vibration suppression semi-active inertia seat suspension system according to claim 6, characterized in that: The distance between the front side of the seat cushion (12) and the front side of the triangular support area support is not less than the distance between the rear side of the seat cushion (12) and the rear side of the triangular support area support.

8. The low-frequency vibration suppression semi-active inertia seat suspension system according to claim 6, characterized in that: The inertia container module (20) and the damper module (30) are located on the front support side of the triangular support area, and the spring module (40) is located on the rear support side of the triangular support area.

9. The low-frequency vibration suppression semi-active inertia seat suspension system according to claim 8, characterized in that: The inertia container module (20) and the damper module (30) are symmetrically distributed on both sides of the spring module (40).

10. The low-frequency vibration suppression semi-active inertia seat suspension system according to any one of claims 5 to 9, characterized in that: The triangular support area is in the form of an equilateral triangle.

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