Semi-active multi-damping hydraulic bushing under electromagnetic induction control

Abstract

The invention discloses a semi-active multi-damping hydraulic bushing under electromagnetic induction control, and relates to the technical field of automobile parts, the semi-active multi-damping hydraulic bushing comprises an inner pipe, an elastic element and an outer pipe which are coaxially arranged in sequence from inside to outside, and two closed liquid chambers are oppositely arranged in the elastic element; the inner pipe is coaxially sleeved with the middle pipe assembly, the middle pipe assembly comprises an electromagnetic adjusting pipe and a flow channel assembly which are sequentially arranged from top to bottom, an electromagnetic induction coil is arranged between the lower end of the electromagnetic adjusting pipe and the inner pipe, an electromagnetic adjusting flow channel is arranged between the upper end of the flow channel assembly and the inner pipe, and the electromagnetic adjusting flow channel is communicated with the two liquid chambers respectively; an inertia flow channel is arranged between the elastic element and the outer pipe and communicated with the two liquid chambers respectively. Damping characteristics can be optimized for vibration of different frequencies (such as engine total speed jitter or road impact).

Description

Technical Field

[0001] The invention relates to the technical field of automobile parts, in particular to a semi-active multi-damping hydraulic bushing under electromagnetic induction control. Background Art

[0002] In recent years, with rising consumer demand for enhanced ride comfort, the current technology for hydraulic bushings remains primarily passive. Hydraulic bushings generate damping force by applying external force and allowing damping fluid to flow through inertial channels. However, this damping is limited to a specific frequency range, providing vibration reduction. Summary of the Invention

[0003] In view of the defects in the prior art, the purpose of the present invention is to provide a semi-active multi-damping hydraulic bushing under electromagnetic induction control, which can optimize the damping characteristics for vibrations of different frequencies (such as engine total speed vibration or road impact).

[0004] In order to achieve the above objectives, the technical solution adopted by the present invention is: a semi-active multi-damping hydraulic bushing under electromagnetic induction control, comprising an inner tube, an elastic element and an outer tube coaxially arranged from the inside to the outside, and two closed liquid chambers are relatively arranged in the elastic element; it also includes a middle tube assembly coaxially sleeved outside the inner tube, the middle tube assembly includes an electromagnetic regulating tube and a flow channel assembly arranged in sequence from top to bottom, an electromagnetic induction coil is arranged between the lower end of the electromagnetic regulating tube and the inner tube, an electromagnetic regulating flow channel is arranged between the upper end of the flow channel assembly and the inner tube, and the electromagnetic regulating flow channel is respectively connected to the two liquid chambers; an inertial flow channel is arranged between the elastic element and the outer tube, and the inertial flow channel is respectively connected to the two liquid chambers.

[0005] On the basis of the above technical solution, two electromagnetic control valves are further provided in the flow channel assembly, and the two electromagnetic control valves are respectively located at the interfaces between the inertial flow channel and the two liquid chambers.

[0006] On the basis of the above technical solution, the liquid chamber is filled with electromagnetic damping liquid or ordinary damping liquid.

[0007] On the basis of the above technical solution, a sealing ring is provided at the connection between the upper end of the flow channel assembly and the electromagnetic regulating tube.

[0008] Based on the above technical solution, the elastic element is a rubber body.

[0009] On the basis of the above technical solution, a ball cage is provided in the elastic element.

[0010] On the basis of the above technical solution, it also includes an electric wire, one end of which is connected to the external control power supply, and the other end of the electric wire extends into the electromagnetic regulating tube and is connected to the electromagnetic induction coil.

[0011] On the basis of the above technical solution, it also includes a sensor, which is used to monitor the vibration frequency and amplitude in real time.

[0012] The beneficial effects of the present invention are: 1. Fast response: The millisecond-level response speed of electromagnetic rheological fluid enables real-time adjustment.

[0013] 2. Low energy consumption: Energy is consumed only during adjustment, which is more energy-efficient than a fully active system.

[0014] 3. Wideband adaptability: The damping characteristics can be optimized for vibrations of different frequencies (such as engine speed vibration or road impact).

[0015] 4. Ability to adjust damping and peak value as needed: According to the required damping value and damping frequency, the corresponding current information is input to the bushing; the bushing magnetic induction coil generates a corresponding electromagnetic field, and the viscosity of the electromagnetic damping fluid changes under the action of the electromagnetic force, thereby producing different damping sizes and damping frequencies. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of a semi-active multi-damping hydraulic bushing under electromagnetic induction control in the present invention; Figure 2 This is a front view of a semi-active multi-damping hydraulic bushing under electromagnetic induction control in the present invention; Figure 3 for Figure 2 Cross-sectional view along the AA axis; Figure 4 for Figure 2 Cross-sectional view along the BB direction; Figure 5 A top view of a semi-active multi-damping hydraulic bushing under electromagnetic induction control in the present invention; Figure 6 for Figure 5 Cross-sectional view in CC direction; Figure 7 Schematic diagram of the structure of the middle tube assembly in the present invention; Figure 8 This is a structural schematic diagram of the middle tube assembly in the present invention from another perspective.

[0017] Reference numerals: 1- outer tube; 2-Inner tube; 3-elastic element; 31-liquid chamber; 32-inertial flow channel; 33-ball cage; 4-middle pipe assembly; 41-electromagnetic regulating tube; 42-electromagnetic induction coil; 43-flow channel assembly; 44-electromagnetic regulating flow channel; 45-sealing ring; 46-electric wire; 47-electromagnetic control valve. DETAILED DESCRIPTION

[0018] 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 with the same or similar functions.

[0019] In the description of the present invention, it should be noted that, for directional words, such as the terms "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like, indicating directions and positional relationships, are based on the directions 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 device or element referred to must have a specific direction, be constructed and operated in a specific direction, and should not be understood as limiting the specific scope of protection of the present invention.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Therefore, the terms "first" and "second" may explicitly or implicitly refer to one or more of these features. Throughout the description of the present invention, "several" and "a number" mean two or more, unless otherwise specifically defined.

[0021] In the present invention, unless otherwise specified or limited, the terms "assemble," "connect," and "connect" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integral connection; mechanical connection; direct connection, connection through an intermediate medium, or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0022] In the present invention, unless otherwise specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature therebetween. Furthermore, a first feature being "above," "below," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "above," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0023] The following description of the embodiments of the present invention is provided in conjunction with the accompanying drawings to further describe the specific embodiments of the present invention so that the technical solutions and beneficial effects of the present invention will be more clearly understood. The following description of the embodiments with reference to the accompanying drawings is illustrative and intended to explain the present invention, but is not to be construed as limiting the present invention.

[0024] See also Figures 1 to 8 As shown, an embodiment of the present invention provides a semi-active multi-damping hydraulic bushing controlled by electromagnetic induction. The bushing comprises an inner tube 2, an elastic element 3, and an outer tube 1, coaxially arranged from inside to outside. Two sealed fluid chambers 31 are positioned opposite each other within the elastic element 3. Specifically, the elastic element 3 is a rubber body that provides basic stiffness and isolates high-frequency vibrations. A cage 33 is positioned within the elastic element 3.

[0025] The semi-active multi-damping hydraulic bushing under electromagnetic induction control also includes a middle tube assembly 4 coaxially sleeved outside the inner tube 2. The middle tube assembly 4 comprises an electromagnetic regulating tube 41 and a flow channel assembly 43, arranged in order from top to bottom. An electromagnetic induction coil 42 is disposed between the lower end of the electromagnetic regulating tube 41 and the inner tube 2. An electromagnetic regulating flow channel 44 is disposed between the upper end of the flow channel assembly 43 and the inner tube 2, respectively communicating with the two fluid chambers 31. An inertial flow channel 32 is disposed between the elastic element 3 and the outer tube 1, respectively communicating with the two fluid chambers 31. The inertial flow channel 32 is a narrow passage connecting the hydraulic chambers, generating a damping effect when liquid passes through it. Specifically, a sealing ring 45 is provided at the connection between the upper end of the flow channel assembly 43 and the electromagnetic regulating tube 41. The bushing also includes an electrical wire 46, one end of which is connected to an external control power supply, and the other end of which extends into the electromagnetic regulating tube 41 and connects to the electromagnetic induction coil 42.

[0026] Specifically, the flow channel assembly 43 is further provided with two electromagnetic control valves 47, located at the interface between the inertial flow channel 32 and the two liquid chambers 31. The liquid chambers 31 are filled with either electromagnetic damping fluid or conventional damping fluid. When the electromagnetic damping fluid is present in the liquid chambers 31, the damping is adjusted by adjusting the magnitude of the electromagnetic field to control the viscosity of the liquid in the electromagnetically adjustable flow channel. When conventional damping fluid is present in the liquid chambers 31, electromagnetic control valves are provided at the inlet and outlet of the electromagnetically adjustable flow channel. By controlling the opening and closing of the electromagnetic control valves, the damping force of the electromagnetically adjustable flow channel is adjusted.

[0027] The semi-active multi-damping hydraulic bushing under electromagnetic induction control also includes a sensor, which is used for monitoring the vibration frequency and amplitude in real time.

[0028] The working principle of the present invention is: Active regulation is added on the basis of passive regulation, the response frequency bandwidth becomes wider and the damping is adjustable.

[0029] Passive mode: When no electromagnetic field is applied, the rheological fluid maintains low viscosity, the liquid passes freely through the inertial channel, the damping force is small, and the system absorbs vibrations with basic stiffness.

[0030] Active Adjustment: 1. The sensor monitors vibration frequency, amplitude and other signals in real time.

[0031] 2. The controller calculates the required damping based on the input signal and adjusts the electromagnetic field strength.

[0032] 3. Magnetic field / electric field enhancement: The rheological fluid viscosity increases or even solidifies, restricting fluid flow, significantly improving damping force, and suppressing large-amplitude vibrations (such as those on bumpy roads). Ordinary damping fluid controls the opening and closing of the electromagnetically regulated flow channel to increase damping force. There are two forms of adjustment of the electromagnetic flow channel: when the liquid chamber 31 contains electromagnetic damping liquid, the damping is adjusted by adjusting the size of the electromagnetic field to control the viscosity of the liquid in the electromagnetic adjustment flow channel; when the liquid chamber 31 contains ordinary damping liquid, electromagnetic control valves are provided at the inlet and outlet of the electromagnetic adjustment flow channel, and the size of the damping force of the electromagnetic adjustment flow channel is adjusted by controlling the opening and closing of the electromagnetic control valves.

[0033] 4. Magnetic field / electric field weakening: The rheological fluid restores fluidity, reduces damping, and optimizes comfort (such as smooth driving).

[0034] To sum up, when the vehicle of the present invention receives different working condition information, it inputs corresponding current information to the bushing according to the required damping value and damping segment frequency; the bushing magnetic induction coil generates a responsive electromagnetic field, and the viscosity of the electromagnetic damping fluid changes under the action of the electromagnetic force, thereby producing different damping sizes and damping frequencies. When the viscosity of the damping fluid is large enough, the damping increases sharply, and the bushing only presents the damping of the rubber bushing itself.

[0035] The semi-active multi-damping hydraulic bushing of the present invention is an ordinary hydraulic bushing when no power is supplied, and has only a fixed hydraulic characteristic; when power is supplied, the damping size and frequency can be adjusted under the condition of electromagnetic force.

[0036] In the description of the specification, reference to the terms "one embodiment," "preferably," "example," "specific example," or "some examples" 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. The schematic expressions of the above terms in this specification do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples.

[0037] The present invention is not limited to the above-described embodiments. Persons skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are deemed to be within the scope of protection of the present invention. Any matters not described in detail in this specification constitute prior art known to those skilled in the art.

Claims

1. A semi-active multi-damping hydraulic bushing under electromagnetic induction control, comprising an inner tube (2), an elastic element (3), and an outer tube (1) coaxially arranged from the inside to the outside, and two closed liquid chambers (31) are arranged opposite to each other in the elastic element (3); characterized in that: The invention also includes a middle tube assembly (4) coaxially sleeved outside the inner tube (2), the middle tube assembly (4) including an electromagnetic regulating tube (41) and a flow channel assembly (43) arranged in sequence from top to bottom, an electromagnetic induction coil (42) being arranged between the lower end of the electromagnetic regulating tube (41) and the inner tube (2), an electromagnetic regulating flow channel (44) being arranged between the upper end of the flow channel assembly (43) and the inner tube (2), the electromagnetic regulating flow channel (44) being respectively communicated with the two liquid chambers (31); and an inertial flow channel (32) being arranged between the elastic element (3) and the outer tube (1), the inertial flow channel (32) being respectively communicated with the two liquid chambers (31).

2. The semi-active multi-damping hydraulic bushing under electromagnetic induction control according to claim 1, characterized in that: Two electromagnetic control valves (47) are also provided in the flow channel assembly (43), and the two electromagnetic control valves (47) are respectively located at the interfaces between the inertial flow channel (32) and the two liquid chambers (31).

3. The semi-active multi-damping hydraulic bushing under electromagnetic induction control according to claim 1, characterized in that: The liquid chamber (31) is filled with electromagnetic damping liquid or ordinary damping liquid.

4. The semi-active multi-damping hydraulic bushing under electromagnetic induction control according to claim 1, characterized in that: A sealing ring (45) is provided at the connection between the upper end of the flow channel assembly (43) and the electromagnetic regulating tube (41).

5. The semi-active multi-damping hydraulic bushing under electromagnetic induction control according to claim 1, characterized in that: The elastic element (3) is a rubber body.

6. The semi-active multi-damping hydraulic bushing under electromagnetic induction control according to claim 1, characterized in that: A ball cage (33) is provided in the elastic element (3).

7. The semi-active multi-damping hydraulic bushing under electromagnetic induction control according to claim 1, characterized in that: It also includes an electric wire (46), one end of which is connected to an external control power supply, and the other end of which extends into the electromagnetic regulating tube (41) and is connected to the electromagnetic induction coil (42).

8. The semi-active multi-damping hydraulic bushing under electromagnetic induction control according to claim 1, characterized in that: The device also includes a sensor for monitoring the vibration frequency and amplitude in real time.

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