Hydraulic vibration reduction device and vibration reduction method

Abstract

The present invention relates to the technical field of vehicle vibration reduction, and specifically to a hydraulic vibration reduction device and vibration reduction method. The device includes a buffer mechanism, wherein a first sealed chamber and a second sealed chamber are provided in the buffer mechanism, and a hydraulic medium is provided in the first sealed chamber and the second sealed chamber; a pressure-bearing mechanism, wherein the pressure-bearing mechanism is provided on the buffer mechanism and can apply pressure to one of the first sealed chamber and the second sealed chamber; and an adjusting mechanism, wherein the adjusting mechanism is provided on the buffer mechanism and is used to adjust the cross-sectional size of the damping channel connecting the first sealed chamber to the second sealed chamber, thereby adjusting the damping size generated by the buffer mechanism on the pressure-bearing mechanism. The pressure-bearing mechanism of this device transmits vibration to the buffer mechanism, and the hydraulic medium in the buffer mechanism can provide buffering. The adjusting mechanism can adjust the cross-sectional size of the damping channel of the first sealed chamber and the second sealed chamber to adjust the stiffness of the directly pressurized sealed chamber, thereby adjusting the damping performance of the device and solving the problem of not being able to simultaneously meet higher durability and vibration reduction performance.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle vibration reduction, and in particular to a hydraulic vibration reduction device and a vibration reduction method. Background Art

[0002] A vehicle's NVH performance is directly related to ride comfort. In terms of vehicle vibration reduction technology, rubber pads are often installed at the ends of dampers (such as springs) as buffers to slow down the transmission of vehicle vibration. When considering vibration filtering and ensuring connection stability, a larger rubber stiffness is often required to ensure durability and handling performance, while a smaller stiffness is required to meet the needs of vibration filtering. Conventional rubber pads cannot simultaneously meet high durability and vibration reduction performance due to their inherent material properties. Summary of the Invention

[0003] The main purpose of the present invention is to solve the problem that the rubber pad cannot have higher durability and vibration reduction performance at the same time, and to provide a hydraulic vibration reduction device and a vibration reduction method.

[0004] The technical solution adopted by the present invention is: a hydraulic vibration reduction device, the device comprising:

[0005] A buffer mechanism, wherein a first sealed cavity and a second sealed cavity are provided therein, the first sealed cavity and the second sealed cavity are connected through a damping channel and hydraulic medium is provided therein;

[0006] a pressure-bearing mechanism, the pressure-bearing mechanism being provided on the buffer mechanism and being used to apply pressure to the first sealed cavity or the second sealed cavity;

[0007] The regulating mechanism is provided on the buffer mechanism and is used to adjust the cross-sectional size of the damping channel connecting the first sealed cavity to the second sealed cavity, thereby adjusting the damping size generated by the buffer mechanism on the pressure-bearing mechanism.

[0008] Furthermore, the adjustment mechanism includes an aperture adjustment member provided on the damping channel connecting the first sealed cavity to the second sealed cavity, for adjusting the aperture opening of the damping channel.

[0009] Furthermore, the buffer mechanism includes a shell and a buffer pad arranged on the shell; the buffer pad is built into or connected to the shell to form the first sealed cavity and the second sealed cavity; the aperture adjustment member is arranged on the damping channel connecting the first sealed cavity to the second sealed cavity.

[0010] Furthermore, the buffer mechanism includes a shell and a buffer pad arranged on the shell; the pressure-bearing mechanism is arranged in the shell and connected with the buffer pad and the shell to form the first sealed cavity and the second sealed cavity located on both sides of the pressure-bearing mechanism; the damping channel is provided on the pressure-bearing mechanism.

[0011] Furthermore, a sealed lubricating cavity is formed between the end of the pressure-bearing mechanism and the inner wall of the shell; a lubricating piston is provided in the sealed lubricating cavity for lubricating and sealing the pressure-bearing mechanism and the shell.

[0012] Furthermore, the pressure-bearing mechanism includes a pressure-bearing plate group, and an open groove is provided at the end of the pressure-bearing plate group, and the open groove and the inner wall of the shell form the sealed lubrication cavity.

[0013] Furthermore, the pressure-bearing mechanism includes a first pressure-bearing plate and a second pressure-bearing plate fixed to the side of the first pressure-bearing plate; the end of the second pressure-bearing plate is separated from the end of the first pressure-bearing plate to form an open groove for placing the lubricating piston; the first pressure-bearing plate and the second pressure-bearing plate are respectively formed with the first and second pressure-bearing bodies and the shell at one end away from the lubricating piston; the second pressure-bearing plate and the first pressure-bearing plate are jointly fixed with the aperture adjustment part.

[0014] Furthermore, a sliding gap is provided between the end of the pressure-bearing mechanism close to one end of the sealed lubrication cavity and the inner wall of the shell.

[0015] Furthermore, the first pressure plate and the second pressure plate are sleeved on the shock absorber shaft and have a sway gap with the shock absorber shaft. The first pressure plate and the second pressure plate are separated near the end of the shock absorber shaft to form an installation cavity with the shock absorber shaft. A sway pressure plate located in the installation cavity is fixed on the shock absorber shaft, and a tough pad for pressing the first pressure plate and the second pressure plate is fixed on the sway pressure plate.

[0016] Furthermore, the side wall at one end of the damping channel is connected to a regulating valve channel, and the first sealed cavity is connected to the second sealed cavity through the damping channel and the regulating valve channel; the aperture adjustment part includes a sealing plug that is slidably arranged in the damping channel and gradually opens or seals the regulating valve channel by sliding, an electromagnet for magnetically attracting the sealing plug to slide open the cross-sectional size of the regulating valve channel, and an elastic part that pushes or pulls the sealing plug to slide and seal the regulating valve channel.

[0017] Furthermore, one end of the damping channel is connected to the first sealed cavity, and the regulating valve path is arranged on the side wall of the damping channel and is connected to the second sealed cavity; and both ends of the elastic member are respectively connected to the sealing plug and the electromagnet.

[0018] Furthermore, the inner wall of the regulating valve channel near one end of the damping channel forms an acute angle with the axial direction of the damping channel to form a progressive sealing section, and the sealing plug slides to adjust the gap size with the progressive sealing section to adjust the aperture opening.

[0019] Furthermore, it also includes an information collector and a controller for collecting vehicle driving information; the controller sends aperture adjustment information for adjusting the aperture adjustment member based on the vehicle driving information, thereby adjusting the aperture opening of the aperture adjustment member.

[0020] Furthermore, the aperture control information includes current; the aperture opening refers to the flow cross-sectional size of the damping channel; and the aperture adjustment component includes an electromagnetic adjustment component for adjusting the aperture opening according to the current size.

[0021] Furthermore, the vehicle driving information includes vehicle speed and vehicle acceleration information; when the vehicle speed is less than a set first threshold, the controller adjusts the aperture opening of the aperture adjustment member according to the vehicle acceleration information.

[0022] Furthermore, the controller adjusts the aperture opening of the aperture adjustment member to a closed state when the vehicle speed is greater than or equal to a first threshold.

[0023] Furthermore, the vehicle acceleration information includes vertical acceleration; the controller performs Fourier transform analysis based on the vertical acceleration to obtain a frequency domain signal, and issues aperture adjustment information according to PSD values ​​of different frequency segments of the frequency domain signal.

[0024] Furthermore, the frequency segment of the frequency domain signal includes a first frequency segment and a second frequency segment having a frequency higher than the first frequency segment; when the PSD1 value of the first frequency segment is less than the set first PSD threshold, the controller adjusts the aperture opening of the aperture adjustment component according to the PSD2 value of the second frequency segment; the aperture opening increases with the increase of the PSD2 value.

[0025] Furthermore, the controller adjusts the aperture opening to a closed state when the PSD1 value is greater than or equal to a first PSD threshold or when the PSD2 value is less than a second PSD threshold.

[0026] Furthermore, the buffer mechanism includes a buffer protrusion provided in the first sealed cavity or the second sealed cavity; when the pressure-bearing mechanism applies pressure to the buffer mechanism, the buffer protrusion abuts against the inner wall opposite to the inner wall of the sealed cavity where the buffer protrusion is located.

[0027] Furthermore, the side wall of the opening end of the pressure plate group is provided with the buffer protrusion.

[0028] Another aspect of the present invention further provides a buffering and vibration reduction method, using any of the hydraulic vibration reduction devices provided by the present invention, the method comprising:

[0029] Collecting vehicle driving information; the vehicle driving information includes vehicle speed and PSD values ​​of multiple frequency bands; collecting vehicle vertical acceleration, performing Fourier transform analysis on the vehicle vertical acceleration to obtain a frequency domain signal, the frequency domain signal includes PSD values ​​of multiple frequency bands; the frequency bands include a first frequency band and a second frequency band having a frequency higher than the first frequency band;

[0030] The aperture opening is adjusted according to the PSD value of the frequency domain signal in different frequency bands, including:

[0031] When the vehicle speed is less than a set first threshold, the aperture opening of the aperture adjustment member is regulated according to the PSD values ​​of multiple frequency bands, including:

[0032] When the PSD1 value of the first frequency band is less than the set first PSD threshold value and the PSD2 value of the second frequency band is not less than the second PSD threshold value, the aperture opening of the aperture adjustment member 52 is correspondingly adjusted according to the PSD2 value of the second frequency band; the aperture opening increases as the PSD2 value increases;

[0033] When the PSD1 value in the first frequency band is greater than or equal to a set first PSD threshold, the aperture opening is adjusted to a closed state.

[0034] According to a buffering and vibration reduction method provided by the present invention, the aperture adjustment information is issued according to the PSD values ​​of different frequency segments of the frequency domain signal, and further includes:

[0035] When the vehicle speed is not less than a first threshold, the aperture opening is adjusted to a closed state;

[0036] When the vehicle speed is less than the first threshold and the PSD1 value of the first frequency band is not less than the set first PSD threshold, the aperture opening is adjusted to a closed state;

[0037] When the vehicle speed is less than the first threshold and the PSD2 value of the second frequency band is not greater than the set second PSD threshold, the aperture opening is adjusted to a closed state;

[0038] The first PSD threshold is greater than the second PSD threshold; the first frequency range includes 0~8Hz, the second frequency range includes 8~30Hz; the second PSD threshold range is 3~7g 2 / H, preferably 5g 2 / Hz; the first PSD threshold is 8~12 / Hz, preferably 10g 2 / Hz. In actual use, no current is output and the aperture opening of the electromagnetic adjustment component is closed.

[0039] The beneficial effects of the present invention include: 1. The external pressure received by the pressure-bearing mechanism is converted into pressure on the first sealed cavity or the second sealed cavity of the buffer mechanism, and the hydraulic medium in the cavity provides a buffering effect; the cross-sectional size of the damping channel connecting the first sealed cavity and the second sealed cavity can be adjusted by the adjustment mechanism, and the stiffness of the sealed cavity directly pressurized by the pressure-bearing mechanism can be adjusted, thereby making the damping performance of the vibration damping device adjustable, adapting to different application scenarios, and solving the problem that conventional rubber pads cannot simultaneously meet the requirements of higher durability and vibration damping performance;

[0040] An aperture adjustment member is used as an adjustment mechanism. By adjusting the aperture opening of the aperture adjustment member, that is, adjusting the minimum cross-sectional size of the damping channel, the stiffness of the sealing cavity directly pressurized by the pressure-bearing mechanism can be adjusted, thereby adapting to reducing the vibration of the vehicle under different driving conditions and improving the vehicle's riding comfort.

[0041] The buffer mechanism of the present invention has a simple structure. A first sealed cavity and a second sealed cavity are formed by a housing, a buffer pad, and a pressure-bearing mechanism. The first sealed cavity and the second sealed cavity are located in the pressure-bearing mechanism, which facilitates fixing the aperture adjustment member on the pressure-bearing mechanism to control the cross-sectional size of the damping channel of the first sealed cavity and the second sealed cavity.

[0042] A lubricating piston can be installed through the sealed lubrication cavity. When the pressure-bearing mechanism is under pressure, it moves relative to the housing in the pressure direction. The lubricating piston at the end of the pressure-bearing mechanism can seal and lubricate the pressure-bearing mechanism and the housing, thereby preventing the first sealed cavity and the second sealed cavity from communicating with each other and releasing pressure, which may cause the stiffness of the device to be unable to be accurately adjusted. At the same time, it also avoids noise caused by sliding contact between the pressure-bearing mechanism and the housing.

[0043] The pressure-bearing mechanism of the present invention has a simple structure and comprises a first pressure-bearing plate and a second pressure-bearing plate. The ends thereof are bent and separated to form an open groove, which is convenient for placing a lubricating piston, thereby achieving a sealing effect between the pressure-bearing mechanism and the housing while also providing lubrication.

[0044] The pressure-bearing mechanism of the present invention can also be sleeved on the shock absorber shaft to form a mounting cavity with the shock absorber shaft for placing a tough pad, flexibly connecting the pressure-bearing mechanism to the shock absorber shaft. The preset offset gap allows the shock absorber shaft to deflect laterally during vibration, thereby facilitating vibration reduction and improving driving comfort.

[0045] The aperture adjustment member of the present invention adopts electromagnetic adjustment, has a simple structure, and the sealing plug slides in the damping channel to gradually open and seal the regulating valve channel. The aperture opening can be adjusted by adjusting the current, and is easy to use.

[0046] One end of the regulating valve channel forms an acute angle with the damping channel to form a progressive sealing section. The sealing plug slides to adjust the gap between the sealing plug and the progressive sealing section to adjust the aperture opening. This makes adjustment and use easier, ensuring the sealing effect. At the same time, it protects the sealing plug from being scratched at the connection between the damping channel and the regulating valve channel, thereby extending the service life.

[0047] When the pressure-bearing mechanism applies pressure to the buffer mechanism, the buffer protrusion can abut against the inner wall on the opposite side of the inner wall of the sealing cavity. The deformation of the buffer protrusion can further absorb vibration energy, improve the damping performance, and at the same time increase the service life of the device;

[0048] The buffering and vibration reduction method provided by the present invention fully utilizes the characteristics of the hydraulic vibration reduction device of the present invention. The vehicle speed and the PSD values ​​of different frequency bands can accurately feedback the driving state of the vehicle. Based on this, aperture control information is issued to adjust the aperture opening. The damping performance of the device can be adjusted to adapt to the actual driving state, thereby greatly reducing vibration transmission and improving ride comfort. It is simple to operate, easy to use, and has high versatility.

[0049] The hydraulic vibration damping device of the present invention transmits vibration to the buffer mechanism through the pressure-bearing mechanism. The hydraulic medium in the buffer mechanism can provide buffering. The cross-sectional size of the damping channel of the first sealed cavity and the second sealed cavity can be adjusted through the adjustment mechanism, and the stiffness of the sealed cavity directly pressurized by the pressure-bearing mechanism can be adjusted to achieve the adjustment of the damping performance of the device, thereby solving the problem of not being able to simultaneously meet higher durability and vibration damping performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] Figure 1 : Schematic diagram of the structure of the hydraulic vibration reduction device of the present invention;

[0051] Figure 2 : A schematic diagram of the partial structure of the hydraulic vibration damping device of the present invention;

[0052] Figure 3 : A schematic structural diagram of the buffer mechanism connected to the pressure-bearing mechanism of the present invention;

[0053] Figure 4 : Schematic diagram of the aperture adjustment member structure of the present invention;

[0054] Figure 5 : A schematic structural diagram of the aperture adjustment member of the present invention in a state where the damping channel is opened;

[0055] Figure 6 : A schematic structural diagram of another embodiment of the aperture adjustment member of the present invention;

[0056] Figure 7 : Flowchart of the buffering and vibration reduction method of the present invention;

[0057] Figure 8 : Schematic diagram of the waveform of frequency domain signal segmentation;

[0058] Among them: 1—shell; 11—pressure-bearing part; 12—molding part; 121—transverse solid part; 122—longitudinal solid part; 13—first sealing chamber; 14—second sealing chamber; 15—damping channel; 16—regulating valve channel; 161—progressive sealing section; 2—buffer pad; 21—first pad body; 22—second pad body; 3—pressure-bearing mechanism; 31—buffer collision; 32—first pressure-bearing plate; 33—second pressure-bearing plate; 4—lubricating piston; 5—adjusting mechanism; 51—controller; 52—aperture adjusting member; 521—sealing plug; 522—electromagnet; 523—elastic member; 6—shock absorber shaft; 61—sway pressure plate; 611—tough pad; 62—tough pad; 7—sway gap. DETAILED DESCRIPTION

[0059] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but are not to be construed as limiting the present invention.

[0060] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 should not be understood as limiting the present invention.

[0061] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0062] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0063] The hydraulic vibration damping device of the present invention can be used for vehicle vibration reduction. It is installed at the end of a pressure-applying member (such as a damper) and transmits vibration to a buffer mechanism through a pressure-bearing mechanism 3. The hydraulic medium in the buffer mechanism can provide buffering. The cross-sectional size of the damping channel 15 of the first sealed cavity 13 and the second sealed cavity 14 can be adjusted by an adjustment mechanism 5. The hydraulic medium in one sealed cavity flows into the other sealed cavity after being pressurized. By adjusting the cross-sectional size of the damping channel 15, the inflow speed can be controlled to adjust the stiffness of the sealed cavity directly pressurized by the pressure-bearing mechanism 3, thereby achieving adjustment of the damping performance of the device, solving the problem that existing rubber pads cannot simultaneously meet higher durability and vibration reduction performance.

[0064] A hydraulic vibration reduction device, specifically, Figures 1 to 6 As shown, it includes a buffer mechanism, a pressure-bearing mechanism 3 and an adjusting mechanism 5. The buffer mechanism is provided with a first sealed cavity 13 and a second sealed cavity 14. Hydraulic medium is provided in the first sealed cavity 13 and the second sealed cavity 14. The pressure-bearing mechanism 3 is provided on the buffer mechanism and can apply pressure to one of the first sealed cavity 13 and the second sealed cavity 14. Figure 1 As shown, pressure is applied to the first sealed cavity 13; the adjusting mechanism 5 is provided on the buffer mechanism, and is used to adjust the cross-sectional size of the damping channel 15 connecting the first sealed cavity 13 to the second sealed cavity 14. When the pressure-bearing mechanism 3 applies pressure to the buffer mechanism, the hydraulic medium in one of the sealed cavities flows into the other sealed cavity after being pressurized. By adjusting the cross-sectional size of the damping channel 15, the inflow speed can be adjusted to adjust the stiffness of the sealed cavity directly pressurized by the pressure-bearing mechanism 3, thereby adjusting the damping size generated by the buffer mechanism on the pressure-bearing mechanism 3.

[0065] In some cases, the adjustment mechanism 5 can adjust the damping channel 15 to a closed state, and the pressure in the first sealed cavity 13 is relatively constant, that is, the stiffness is relatively fixed, which is suitable for driving conditions with good road conditions.

[0066] In one embodiment, if Figure 2 As shown, the adjustment mechanism 5 is provided with an aperture adjustment member 52 on the damping channel 15 connecting the first sealed cavity 13 to the second sealed cavity 14, for adjusting the aperture opening of the damping channel 15, that is, adjusting the size of the flow cross section of the damping channel 15.

[0067] In certain embodiments, as Figures 2 and 3As shown, the buffer mechanism includes a shell 1 and a buffer pad 2 provided on the shell 1; the buffer pad 2 is built in or connected with the shell 1 to form a first sealed cavity 13 and a second sealed cavity 14; the aperture adjustment member 52 is provided on the damping channel 15 connecting the first sealed cavity 13 to the second sealed cavity 14. In a more specific solution, the pressure-bearing mechanism 3, the buffer pad 2 and the shell 1 form the first sealed cavity 13 and the second sealed cavity 14 located on both sides of the pressure-bearing mechanism 3, and the two sides of the pressure-bearing mechanism 3 are connected to the shell 1 through the buffer pad 2 to form the first sealed cavity 13 and the second sealed cavity 14; the pressure-bearing mechanism 3 is provided with the above-mentioned damping channel 15, and the damping channel 15 is fixed with an aperture adjustment member 52. When the pressure-bearing mechanism 3 applies pressure to the buffer assembly, vibration reduction begins. The first sealed cavity 13 and the second sealed cavity 14 are respectively located on both sides of the pressure-bearing mechanism 3. The pressure-bearing mechanism 3 has a vibration reduction effect when vibrating back and forth, and has a two-way vibration reduction effect ( Figure 3 The middle pressure-bearing mechanism 3 has a vibration reduction effect when vibrating up and down, and its vibration reduction effect is better.

[0068] In one embodiment, if Figures 2 and 3 As shown, the housing 1 includes a pressure-bearing portion 11 and a molding portion 12 fixedly connected to the pressure-bearing portion 11. The buffer pad 2 includes a first pad body 21 and a second pad body 22. The pressure-bearing portion 11, the first pad body 21, the pressure-bearing mechanism 3, and the molding portion 12 are sealed to form a first sealed cavity 13 located on one side of the pressure-bearing mechanism 3; the pressure-bearing mechanism 3, the second pad body 22, and the molding portion 12 are sealed to form a second sealed cavity 14 located on the other side of the pressure-bearing mechanism 3. Preferably, the molding portion 12 includes a transverse solid portion 121 and a longitudinal solid portion 122. The transverse solid portion 121 is arranged longitudinally and its middle portion is sealedly connected to the pressure-bearing mechanism 3. The longitudinal solid portion 122 is fixedly connected to the transverse solid portion 121 at one end and to the second pad body 22 at the other end. The second sealed cavity 14 is formed by connecting to the pressure-bearing mechanism 3 through the second pad body 22.

[0069] The buffer mechanism includes a shell 1 and a buffer pad 2 provided on the shell 1. Figure 3 As shown, a sealed lubrication cavity is formed between the end of the pressure-bearing mechanism 3 and the inner wall of the housing 1. A lubricating piston 4 is disposed within the sealed lubrication cavity. The lubricating piston 4 is annular and covered with a sealing layer. Lubricating oil is disposed between the sealing layer and the sealed lubrication cavity to lubricate and seal the pressure-bearing mechanism 3 and the housing 1. Rubber is preferably used as the sealing layer.

[0070] In one embodiment, if Figures 2 and 3 As shown, the buffer mechanism includes a buffer protrusion 31 provided in the first sealed cavity 13 or the second sealed cavity 14; when the pressure-bearing mechanism 3 applies pressure to the buffer mechanism, the buffer protrusion 31 abuts against the inner wall on the opposite side of the inner wall of the sealed cavity (the first sealed cavity 13 or the second sealed cavity 14) where the buffer protrusion 31 is located, and the buffer protrusion 31 deforms to absorb the impact force, which can reduce the vibration of the pressure-bearing mechanism 3 to a certain extent, and at the same time avoid damage to the buffer mechanism due to excessive pressure in the first sealed cavity 13 or the second sealed cavity 14.

[0071] Optionally, the buffer protrusion 31 is fixed on the pressure-bearing mechanism 3 and is located in the first sealed cavity 13 and / or the second sealed cavity 14 .

[0072] In one embodiment, if Figure 3 As shown, the pressure-bearing mechanism 3 includes a pressure-bearing plate group, and the upper and lower sides of the pressure-bearing plate group are sealed and connected to the shell 1 through a buffer pad 2 to form a first sealed cavity 13 and a second sealed cavity 14 located on both sides of the pressure-bearing plate group. An open groove is provided at the end of the pressure-bearing plate group, and the open groove and the inner wall of the shell 1 form a sealed lubrication cavity. A lubricating piston 4 is provided in the sealed lubrication cavity to seal the first pressure-bearing plate and the shell 1, ensuring that the hydraulic medium flows through the first sealed cavity 13 and the second sealed cavity 14 only through the aperture adjustment member 52; the side wall of the open end of the pressure-bearing plate group is provided with a buffer bump 31.

[0073] In one embodiment, if Figures 2 and 3 As shown, the pressure plate group includes a first pressure plate 32 and a second pressure plate 33 fixed to the side of the first pressure plate 32; the end of the second pressure plate 33 is separated from the end of the first pressure plate 32 to form an open groove for placing the lubricating piston; the ends of the first pressure plate 32 and the second pressure plate 33 away from the lubricating piston 4 respectively form the first sealed cavity 13 and the second sealed cavity 14 with the shell through the first pad 21 and the second pad 22; the second pressure plate 33 and the first pressure plate 32 are jointly fixed with the aperture adjustment member 52. The side of the first pressure plate 32 and the second pressure plate 33 away from the open groove is used to fix the damper, such as Figures 1 and 2 As shown, the ends are separated and connected to the shock absorber of the automobile suspension. Preferably, a sliding gap is provided between the end of the pressure-bearing mechanism 3 near one end of the sealed lubrication cavity and the inner wall of the housing 1.

[0074] Based on the pressure-bearing mechanism 3 including the first pressure-bearing plate 32 and the second pressure-bearing plate 33, as shown in FIG. Figures 1 and 2As shown, the first pressure plate 32 and the second pressure plate 33 are sleeved on the shock absorber shaft 6, and a yaw gap 7 is provided between each of the first pressure plate 32 and the second pressure plate 33 and the shock absorber shaft 6. The first pressure plate 32 and the second pressure plate 33 are bent away from each other near the end of the shock absorber shaft 6 (the middle part of Figure 1) to form a mounting cavity with the shock absorber shaft 6. A yaw pressure plate 61 located in the mounting cavity is fixed on the shock absorber shaft 6, and a tough pad 611 is fixed on the yaw pressure plate 61 for pressing the first pressure plate 32 and the second pressure plate 33. The shock absorber spring is sleeved on the shock absorber shaft 6, and one end abuts the second pressure plate 33 of the pressure-bearing mechanism 3. When in use, a transverse mounting surface is provided on the plug rod of the shock absorber shaft 6, and the yaw pressure plate 61 is embedded in the tough pad 611 and vulcanized and fixed to the tough pad 611 to form a block structure, which is suitable for installation in the mounting cavity and abuts the first pressure plate 32 and the second pressure plate 33 at the upper and lower ends. The yaw pressure plate 61 is bolted to the mounting surface by bolts. The deflection gap 7 allows the shock absorber shaft 6 to generate a certain deflection with the pressure-bearing mechanism during telescopic movement, thereby avoiding damage to the shock absorber shaft 6 or the pressure-bearing mechanism 3 during vibration due to a rigid connection, and at the same time improving comfort.

[0075] like Figures 4 and 5 As shown, in a certain embodiment, one end of the damping channel 15 is connected to the regulating valve channel 16, and the first sealed chamber 13 is connected to the second sealed chamber 14 through the damping channel 15 and the regulating valve channel 16; the damping channel 15 and the regulating valve channel 16 are shown in the figure as being connected to the first sealed chamber 13 and the second sealed chamber 14 respectively; the aperture adjustment member includes a sealing plug 521, an electromagnet 522 and an elastic member 523, the sealing plug 521 is slidably arranged in the damping channel 15 and realizes the opening or sealing of the regulating valve channel 16 by sliding the position, the electromagnet 522 is arranged on one side of the sealing plug 521, and is used to magnetically attract the sealing plug 521 to slide and open the flow cross-section size of the regulating valve channel 16 when the power is on; one end of the elastic member 523 is connected to the sealing plug 521, and is used to push or pull the sealing plug 521 to slide and seal the elastic member 523 of the regulating valve channel 16. In the initial state, the electromagnet 522 is not energized, and the sealing plug 521 seals the above-mentioned damping channel 15. When energized, the electromagnet 522 magnetically attracts the sealing plug 521 to slide and connect the damping channel 15 with the regulating valve channel 16. Within a certain range, the greater the magnetic attraction force, the larger the cross-section of the damping channel 15 connecting to the regulating valve channel 16.

[0076] Based on the aperture adjustment member 52 including a sealing plug 521, an electromagnet 522 and an elastic member 523, as shown in FIG. Figure 5As shown, one end of the damping channel 15 communicates with the first sealed cavity 13, and the regulating valve passage 16 is disposed on the sidewall of the damping channel 15 and communicates with the second sealed cavity 14. The ends of the elastic member 523 are respectively connected to the sealing plug 521 and the electromagnet 522. Preferably, the elastic member 523 is disposed on both sides of the sealing plug 521 to generate a thrust and a pull on the sealing plug 521, respectively, to facilitate the movement of the sealing plug 521 to return to the original position and seal the damping channel 15, thereby sealing the regulating valve passage 16. A spring can be used as the elastic member 523.

[0077] One end of the damping channel 15 is connected to the side wall of the regulating valve channel 16. Figure 6 As shown, the inner wall of the regulating valve passage 16 at one end near the damping passage 15 forms an acute angle with the axial direction of the damping passage 15, forming a progressive sealing section 161. The sealing plug 521 slides to adjust the gap between the sealing plug 521 and the progressive sealing section to adjust the aperture opening. Specifically, when the regulating valve passage 16 is open (connected to the damping passage 15), as the sealing plug 521 slides within the damping passage 15 (as shown upward), the gap between the sealing plug 521 and the progressive sealing section 161 gradually decreases to an abutting state, i.e., the aperture opening gradually decreases to a sealed state. When the sealing plug 521 abuts the progressive sealing section 161, it seals the regulating valve passage 16. Sliding the sealing plug 521 in the opposite direction gradually increases the aperture opening. The progressive sealing section 161 formed by this acute angle facilitates the sealing plug 521's sliding and gradually sealing the regulating valve passage 16. It also prevents the sealing plug 521 from being scratched when it slides to the connection between the damping passage 15 and the regulating valve passage 16, thus reducing its service life.

[0078] In a preferred embodiment, Figures 4-6As shown, the aperture adjustment member 52 also includes a mounting tube, the inner cavity of the mounting tube forms the above-mentioned damping channel 15, and the side wall of the mounting tube is provided with a valve hole, which is connected to the second sealing cavity 14 to form an adjusting valve channel 16; the sealing plug 521 is slidably arranged in the mounting tube and can slidably seal or open the valve hole, and the sealing plug 521 has a built-in metal skeleton or magnet so that it can be magnetically attracted; the electromagnet 522 is arranged at one end of the mounting tube; an elastic member fixing member is provided on the mounting tube for fixing the elastic member 523; the elastic member fixing member can optionally use a mounting plate with a channel, which is arranged at the other end of the mounting tube; the elastic member 523 is provided with two groups, one group is connected to the mounting plate and the sealing plug 521 at both ends respectively; the other group is connected to the electromagnet 522 and the sealing plug 521 at both ends respectively; each group of elastic members 523 can be provided with multiple springs. When in use, the electromagnet 522 is energized to adjust the current to adjust the magnetic force of the electromagnet 522. When the current is increased, the magnetic force of the electromagnet 522 increases, and the magnetic attraction to the sealing plug 521 increases. When it is greater than the reverse force of the elastic member 523 on the sealing plug 521, the sealing plug 521 moves downward to open the regulating valve channel 16, so that the damping channel 15 is connected to the regulating valve channel 16; when the current is reduced or closed, the sealing plug 521 moves upward under the action of the elastic member 523 to reset and reduce the flow cross-section or seal the above-mentioned damping channel 15, thereby separating the first sealed cavity 13 and the second sealed cavity 14 into two non-connected cavities.

[0079] The hydraulic vibration damping device further includes an information collector and a controller 51 for collecting vehicle driving information; the controller 51 issues aperture adjustment information for regulating the aperture adjustment member 52 based on the vehicle driving information, thereby adjusting the aperture opening of the aperture adjustment member 52.

[0080] Based on the fact that this device also includes an information collector, the aperture control information includes current; the aperture opening refers to the flow cross-section size of the damping channel 15; and the aperture adjustment member 52 includes an electromagnetic adjustment member for adjusting the aperture opening based on the current. When the damping performance of this device needs to be adjusted, the controller 51 generates a corresponding current based on the vehicle's driving information, which acts on the electromagnetic adjustment member to adjust the aperture opening size of the electromagnetic adjustment member. The aperture opening increases with increasing current. Preferably, the electromagnetic adjustment member is an electromagnetic adjustment member, which changes the magnetic force of the electromagnetic adjustment member's electromagnet 522 by the current, and uses the magnetic force to move the baffle that seals the damping channel 15 to adjust the aperture opening.

[0081] Based on the fact that the device also includes an information collector, the information collector includes a speed sensor and an acceleration sensor; the vehicle driving information includes vehicle speed and vehicle acceleration information, and the vehicle driving information can be obtained from the vehicle system; the controller 51 adjusts the aperture opening of the aperture adjustment member 52 according to the vehicle acceleration information when the vehicle speed v is less than the set first threshold value v1. When the vehicle speed v is greater than or equal to the first threshold value v1, the controller 51 adjusts the aperture opening of the aperture adjustment member 52 to a closed state. Optionally, as Figure 3 As shown, the first threshold value v1 is 80 km / h. When the speed reaches 80 km / h, it is a high-speed driving state. Generally, the road conditions are good. There is no need to adjust the damping size of the present device. The damping channel 15 is closed, and the larger stiffness of the first sealed cavity 13 is directly used for vibration reduction. Optionally, the initial state of the aperture adjustment member 52 is set to the closed state, and the size of the aperture opening is adjusted according to different vehicle driving conditions. When the vehicle speed is high, the road conditions are generally good, and there is no need to adjust the damping size of the vibration reduction device. When the vehicle speed is less than the set first threshold, the aperture opening of the aperture adjustment member is adjusted based on the vehicle acceleration information. The stiffness of the sealed cavity directly pressurized by the pressure-bearing mechanism is adjusted to adapt to the actual driving conditions to adjust the damping size of the present device.

[0082] Based on vehicle driving information, including vehicle speed v and vehicle acceleration information. In one embodiment, the vehicle acceleration information includes vertical acceleration. The controller 51 performs a Fourier transform on the vertical acceleration to obtain a frequency domain signal. The controller then issues aperture adjustment information based on the PSD (power spectral density) values ​​of the frequency domain signal at different frequency bands. Vehicle acceleration refers to the acceleration of the entire vehicle or a component thereof, such as the chassis. The chassis' vertical acceleration is used as vehicle acceleration information. Using the vehicle's vertical acceleration provides a more objective reflection of vehicle vibration. Frequency domain signals are obtained from the acceleration. The PSD values ​​of the frequency domain signal at different frequency bands are then used to issue aperture adjustment information. This information acts on the aperture adjustment element to adjust the aperture opening, thereby adjusting the damping level of the device to suit the actual driving conditions.

[0083] like Figures 6 and 7 As shown, the frequency range of the frequency domain signal includes a first frequency range and a second frequency range with a frequency higher than the first frequency range. When the PSD1 value in the first frequency range is less than a set first PSD threshold, the controller 51 adjusts the aperture opening of the aperture adjustment element 52 based on the PSD2 value in the second frequency range. The aperture opening increases with the increase of the PSD2 value. That is, the PSD2 value corresponds to the aperture adjustment information, achieving corresponding adjustment of the aperture opening. When the PSD1 value is greater than or equal to the first PSD threshold or the PSD2 value is less than the second PSD threshold, the controller 51 controls the aperture opening to a closed state. In actual use, different large currents are emitted according to the PSD values ​​in different frequency ranges, acting on the electromagnetic adjustment element to adjust the aperture opening.

[0084] In actual use, the buffer mechanism can be composed of an annular shell 1 and two buffer pads 2 (a first pad body 21 and a second pad body 22). The cross section of the shell 1 is a U-shaped structure ( Figure 3As shown), a pressure plate group is used as a pressure-bearing mechanism 3. The pressure plate group is arranged between the U-shaped openings of the shell 1. An open groove is provided at one end of the pressure plate group. A lubricating piston 4 is provided in the open groove and is slidably sealedly connected to the inner wall of the U bottom end of the shell 1 through the lubricating piston 4. One side wall of the U-shaped shell 1 is shorter than the other side wall so that the pressure plate group can contact the pressure-applying member to be damped (shock absorber spring shown in the figure). The pressure plate group forms a first sealed cavity 13 on one side of the pressure plate group through the first pad 21 and the lubricating piston 4 and the upper part of the shell 1. A second sealed cavity 14 is formed through the second pad 22 and the lubricating piston 4 and the lower part of the shell 1. An aperture adjusting member 52 is provided on the pressure plate group. The first sealed cavity 13 and the second sealed cavity 14 can be connected in an adjustable manner; the controller 51 is connected to the power supply of the aperture adjustment member 52, and the current of the power supply can be adjusted to adjust the aperture opening; the controller 51 is communicated with the information collector, and the vehicle speed and vehicle vertical acceleration can be transmitted through the ECU; a plurality of groups of buffer protrusions 31 are respectively provided on both sides of the pressure plate group, which are located in the first sealed cavity 13 and the second sealed cavity 14; each group of buffer protrusions 31 is arranged at a circumferential interval, leaving a large gap for the flow of hydraulic medium, so as to avoid the buffer protrusions 31 abutting against the shell 1 when the first pressure plate 32 is under pressure, affecting the flow of the hydraulic medium, resulting in the hydraulic medium being unable to flow smoothly into the second sealed cavity 14.

[0085] The present invention also provides a buffering and vibration reduction method, using the hydraulic vibration reduction device provided by the present invention, such as Figures 7 and 8 As shown, the vibration reduction method includes the following steps:

[0086] S1. Collecting vehicle driving information; the vehicle driving information includes vehicle speed and PSD values ​​of multiple frequency bands; the frequency bands include a first frequency band and a second frequency band having a frequency higher than the first frequency band; collecting the vehicle vertical acceleration, performing Fourier transform analysis on the vehicle vertical acceleration to obtain a frequency domain signal, the frequency domain signal including PSD values ​​of the multiple frequency bands;

[0087] S2. Adjust the aperture opening according to the PSD value of the frequency domain signal in different frequency bands, including:

[0088] S21. When the vehicle speed v is less than a set first threshold v1, the aperture opening of the aperture adjustment member 52 is adjusted based on the PSD values ​​of the multiple frequency bands. Preferably, the first threshold v1 is approximately 80 km / h. The value of the first threshold v1 can be set based on different shock absorber shafts of the vehicle and road conditions.

[0089] In step S21, the aperture opening of the aperture adjustment member 52 is regulated according to the PSD values ​​of the multiple frequency bands, including:

[0090] S211 , when the PSD1 value in the first frequency band is less than the set first PSD threshold, the aperture opening of the aperture adjustment member 52 is adjusted according to the PSD2 value in the second frequency band; the aperture opening increases as the PSD2 value increases.

[0091] S212: When the PSD1 value in the first frequency band is greater than or equal to the set first PSD threshold, adjust the aperture opening to a closed state. In actual use, no current is output, and the aperture opening of the electromagnetic adjustment component is in a closed state.

[0092] In step S211, regulating the aperture opening of the aperture adjustment member 52 according to the PSD2 value of the second frequency band includes regulating the aperture opening of the aperture adjustment member 52 according to the PSD2 value when the PSD2 value of the second frequency band is greater than the second PSD threshold; the first frequency band includes 0~8Hz, and the frequency endpoints can be nearby values. The low frequency band is mainly the movement of the vehicle body, not vibration. When the PSD1 value of this frequency band is large, it is generally on a large undulating road surface, and a larger damping is required to maintain the stability of the vehicle, and the fixed aperture opening is in a closed state; the second frequency band includes 8~30Hz, and the frequency endpoints can be nearby values. This frequency band contributes the most to the riding comfort and fully reflects the NVH performance. When the PSD2 value of this frequency band is less than the second PSD threshold, it means that the road surface is relatively flat and there is no need to reduce the damping, that is, the aperture opening is in a closed state; the second PSD threshold range is 3~7g 2 / H, preferably 5g 2 / Hz; the first PSD threshold is 8~12 / Hz, preferably 10g 2 / Hz.

[0093] In step S2, the step of issuing aperture adjustment information according to the PSD values ​​of different frequency segments of the frequency domain signal also includes:

[0094] S22, when the vehicle speed is not less than a first threshold, adjusting the aperture opening to a closed state;

[0095] S23, when the vehicle speed is less than the first threshold and the PSD1 value of the first frequency band is not less than the set first PSD threshold, adjusting the aperture opening to a closed state;

[0096] S24, when the vehicle speed is less than the first threshold and the PSD2 value of the second frequency band is not greater than the set second PSD threshold, adjusting the aperture opening to a closed state;

[0097] The first PSD threshold is greater than the second PSD threshold; the first frequency range includes 0~8Hz, the second frequency range includes 8~30Hz; the second PSD threshold range is 3~7g 2 / H, preferably 5g 2 / Hz; the first PSD threshold is 8~12 / Hz, preferably 10g 2 / Hz. In actual use, no current is output and the aperture opening of the electromagnetic adjustment component is closed.

[0098] In actual use, the hydraulic shock absorbing device is installed on the damper of the vehicle suspension, so that the spring mounted on the damper can abut the pressure-bearing mechanism 3; the vehicle speed v and vehicle acceleration collected by the information collector are used to determine whether the vehicle speed v is greater than or equal to the first threshold value v1. When the vehicle speed v is greater than or equal to v1, that is, 80 km / h, no current is output, so that the aperture opening of the electromagnetic adjustment component is not closed. This high vehicle speed v indicates that the road condition is good; when the vehicle speed v is less than 80 km / h, the collected vertical acceleration is subjected to Fourier transform analysis to obtain a frequency domain signal, and the frequency domain signal is divided into a first frequency band of 0~8 Hz and a second frequency band of 8~30 Hz. The PSD1 value in the first frequency band is greater than or equal to the first PSD threshold value, that is, 10g 2 / Hz, the controller 51 does not output current to adjust the aperture opening of the electromagnetic adjustment member to a closed state; the PSD1 value in the first frequency band is less than the first PSD threshold value, i.e., 10g 2 / Hz, determine whether the PSD2 value of the second frequency band is greater than the second PSD threshold, i.e., 5g 2 / Hz, if PSD2 is less than 5g 2 / Hz, the controller 51 does not output current, if PSD2 is greater than or equal to 5g 2 / Hz corresponds to the output current size, which regulates the aperture opening of the electromagnetic adjustment component to adapt to and reduce the vibration of the current vehicle driving state.

[0099] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A hydraulic vibration damping device, characterized in that: include, A buffer mechanism, wherein a first sealed cavity (13) and a second sealed cavity (14) are provided in the buffer mechanism, the first sealed cavity (13) and the second sealed cavity (14) are connected via a damping channel (15) and hydraulic medium is provided therein; A pressure-bearing mechanism (3), the pressure-bearing mechanism (3) being provided on the buffer mechanism and being used to apply pressure to the first sealed cavity (13) or the second sealed cavity (14); An adjusting mechanism (5), the adjusting mechanism (5) being provided on the buffer mechanism and being used to adjust the cross-sectional size of the damping channel (15) connecting the first sealed cavity (13) to the second sealed cavity (14), thereby adjusting the damping size generated by the buffer mechanism on the pressure-bearing mechanism (3); The regulating mechanism (5) comprises an aperture regulating member (52) provided on a damping channel (15) communicating between the first sealed cavity (13) and the second sealed cavity (14), and is used to regulate the aperture opening of the damping channel (15); The buffer mechanism comprises a shell (1) and a buffer pad (2) provided on the shell (1); the pressure-bearing mechanism (3) is provided in the shell (1) and is connected to the buffer pad (2) and the shell (1) to form the first sealed cavity (13) and the second sealed cavity (14) located on both sides of the pressure-bearing mechanism (3); the damping channel (15) is provided on the pressure-bearing mechanism (3); A sealed lubricating cavity is formed between the end of the pressure-bearing mechanism (3) and the inner wall of the housing (1); a lubricating piston (4) is provided in the sealed lubricating cavity for lubricating and sealing the pressure-bearing mechanism (3) and the housing (1); The pressure-bearing mechanism (3) includes a first pressure-bearing plate (32) and a second pressure-bearing plate (33) fixed to the side of the first pressure-bearing plate (32); the end of the second pressure-bearing plate (33) is separated from the end of the first pressure-bearing plate (32) to form an open groove for placing the lubricating piston (4); the first pressure-bearing plate (32) and the second pressure-bearing plate (33) respectively form the first sealing cavity (13) and the second sealing cavity (14) with the shell (1) through the first pad (21) and the second pad (22); the second pressure-bearing plate (33) and the first pressure-bearing plate (32) together The aperture adjustment member (52) is fixed; the first pressure plate (32) and the second pressure plate (33) are sleeved on the shock absorber shaft (6) and are provided with a sway gap (7) with the shock absorber shaft (6); the first pressure plate (32) and the second pressure plate (33) are separated from the shock absorber shaft (6) near the end thereof to form a mounting cavity with the shock absorber shaft (6); a sway pressure plate (61) located in the mounting cavity is fixed on the shock absorber shaft (6); and a tough pad (611) for pressing the first pressure plate (32) and the second pressure plate (33) is fixed on the sway pressure plate (61).

2. A hydraulic vibration damping device according to claim 1, characterized in that: The side wall at one end of the damping channel (15) is connected to the regulating valve channel (16), and the first sealed cavity (13) is connected to the second sealed cavity (14) through the damping channel (15) and the regulating valve channel (16); the aperture adjustment member (52) comprises a sealing plug (521) slidably arranged in the damping channel (15) and gradually opening or sealing the regulating valve channel (16) by sliding, an electromagnet (522) for magnetically attracting the sealing plug (521) to slide and open the cross-sectional size of the regulating valve channel (16), and an elastic member (523) for pushing or pulling the sealing plug (521) to slide and seal the regulating valve channel (16).

3. A hydraulic vibration damping device according to claim 2, characterized in that: The inner wall of the regulating valve channel (16) close to one end of the damping channel (15) forms an acute angle with the axial direction of the damping channel (15) to form a progressive sealing section (161), and the sealing plug (521) slides to adjust the gap between the sealing plug and the progressive sealing section to adjust the aperture opening.

4. The hydraulic vibration damping device according to claim 1, wherein: The buffer mechanism comprises a buffer protrusion (31) spaced apart in the first sealed cavity (13) or the second sealed cavity (14); when the pressure-bearing mechanism (3) applies pressure to the buffer mechanism, the buffer protrusion (31) abuts against the inner wall opposite to the inner wall of the sealed cavity where the buffer protrusion (31) is located.

5. A buffering and vibration reduction method, characterized in that: Using the hydraulic vibration damping device according to any one of claims 1 to 4, the method includes: Collecting vehicle driving information; the vehicle driving information includes vehicle speed and PSD values ​​of multiple frequency segments; the frequency segments include a first frequency segment and a second frequency segment having a frequency higher than the first frequency segment; When the vehicle speed is less than a set first threshold, the aperture opening of the aperture adjustment member (52) is regulated according to the PSD values ​​of the multiple frequency bands. include, When the PSD1 value of the first frequency band is less than the set first PSD threshold value, and the PSD2 value of the second frequency band is not less than the second PSD threshold value, the aperture opening of the aperture adjustment member (52) is correspondingly regulated according to the PSD2 value of the second frequency band; the aperture opening increases as the PSD2 value increases.

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