Simplified rotary pressure distribution valve structure suitable for full-active suspension

Abstract

The invention belongs to the technical field of full-automatic suspensions of vehicles, and mainly relates to a simplified rotary pressure distribution valve structure suitable for a full-active suspension, which comprises a rotary pressure distribution valve and a driving motor which are mounted together, the rotary pressure distribution valve comprises a valve body, a valve sleeve and a valve core; two pump body oil ports and two shock absorber oil ports are formed in the valve body; four valve sleeve oil passing ports are formed in the valve sleeve; the valve element is rotationally assembled in the valve sleeve, and four valve element oil passing grooves are formed in the valve element. The driving motor is mounted on the valve body and is in transmission connection with the valve core; in the rotating stroke of the valve element, the oil way between the pump body oil port and the corresponding valve sleeve oil passing port, the oil way between the valve element oil passing groove and the oil way between the corresponding shock absorber oil port can be communicated or blocked. The driving motor is used for controlling the valve element to rotate forwards and backwards to achieve switching of oil ways and control over the opening degree of each valve port so as to continuously adjust the pressure of the upper cavity and the lower cavity of the shock absorber, and the structure is simple.

Description

Technical Field

[0001] The invention belongs to the technical field of vehicle fully automatic suspension, and mainly relates to a simplified rotary pressure distribution valve structure suitable for fully active suspension. Background Art

[0002] With the development of science and technology, intelligence has gradually become popular in people's lives. Passengers have higher and higher requirements for intelligent driving and comfort. Traditional passive suspension and semi-active suspension can no longer meet current needs, and the demand for fully active suspension is increasing. Fully active suspension generally uses hydraulic oil as a medium to adjust and control suspension damping and vehicle height. When the load mass or road conditions of different wheels change, different pressures need to be allocated to each wheel shock absorber to maintain the body posture. The actuator for oil pressure distribution is the pressure distribution valve. In the fully active suspension system, the sensor will continuously monitor the wheel load, body posture and road conditions, and transmit the monitored information to the control unit. The control unit calculates the ideal damping force and body height adjustment requirements based on these data, and sends instructions to the pressure distribution valve. The pressure distribution valve is the key actuator to achieve this control. It adjusts the flow and pressure of the hydraulic oil flowing through each wheel shock absorber according to the instructions of the control unit, thereby achieving independent control of the damping force and body height of each wheel. This allows the vehicle to accurately adjust each wheel according to different load masses and road conditions to maintain the best body posture and driving stability.

[0003] The Chinese invention patent application with application publication number CN116039319A discloses a fully active suspension and a system including the suspension, which uses a sliding valve structure as a pressure distribution valve, and the valve body of the sliding valve is provided with two first valve ports, two second valve ports and two third valve ports, and the valve core including three valve core plates arranged at intervals is slidably connected in the valve body, and the valve core moves in the valve body through the drive of the driving member, so that the sliding valve controls the different passages between the high-pressure accumulator, the low-pressure accumulator, the oil pump and the upper and lower chambers of the shock absorber, and the size of the passage opening and closing, thereby adjusting the size and direction of the output force of the actuator to offset the relative movement of the wheel and the body. However, the use of the sliding valve structure requires a high cleanliness of the hydraulic oil, and impurities in the oil may block the tiny gap of the sliding valve, resulting in failure; in addition, due to the complexity of the sliding valve structure and the high sealing and wear resistance requirements, the use and maintenance costs are high. Summary of the invention

[0004] In view of this, the present invention provides a simplified rotary pressure distribution valve structure suitable for a fully active suspension, which is different from the existing fully automatic suspension using a sliding valve structure. It uses a rotary valve structure to control the shock absorber to provide a continuous and adjustable damping force for the vehicle body.

[0005] To solve the above problems, the present invention adopts the following technical solutions:

[0006] A simplified rotary pressure distribution valve structure suitable for a fully active suspension, comprising a rotary pressure distribution valve and a drive motor which are installed together; the rotary pressure distribution valve comprises a valve body, a valve sleeve and a valve core; the valve body is provided with a valve sleeve installation cavity and a mounting interface for fixing a shock absorber cylinder located beside the valve sleeve installation cavity; the valve body is provided with two pump body oil ports for connecting to a hydraulic pump, and two shock absorber oil ports for connecting to an upper cavity and a lower cavity of the shock absorber respectively; the valve body is provided with two oil passages for connecting the valve sleeve installation cavity with corresponding shock absorber oil ports respectively; the valve sleeve is fixed in the valve sleeve installation cavity, and the circumference of the valve sleeve is Four valve sleeve oil ports are arranged at intervals upward and are connected with two pump body oil ports and two shock absorber oil ports one by one, respectively, and the interior of the valve sleeve is hollow; the valve core is coaxially and rotatably assembled in the valve sleeve, and four valve core oil grooves are arranged at intervals in the circumferential direction of the valve core and are used to match the valve sleeve oil ports, and the valve core oil grooves extend along the axial direction of the valve core; the two relatively arranged valve core oil grooves are connected; the driving motor is installed on the valve body and is transmission-connected with the valve core to drive the valve core to rotate; during its rotation stroke, the valve core can connect or block the oil path between the pump body oil port and the corresponding valve sleeve oil port, the valve core oil groove and the corresponding shock absorber oil port.

[0007] Furthermore, the two pump body oil ports are respectively an oil inlet and an oil return port, the two shock absorber oil ports are respectively a first oil outlet and a second oil outlet, the two oil circuit channels are respectively a first oil circuit channel and a second oil circuit channel, the valve sleeve oil port comprises a first valve sleeve oil port, a second valve sleeve oil port, a third valve sleeve oil port and a fourth valve sleeve oil port which are sequentially arranged clockwise, the oil inlet is connected with the first valve sleeve oil port, the oil return port is connected with the fourth valve sleeve oil port, the first oil outlet, the second valve sleeve oil port and the first oil circuit channel are connected with the upper cavity of the shock absorber, the second oil outlet, the third valve sleeve oil port and the second oil circuit channel are connected with the lower cavity of the shock absorber; the valve core oil groove comprises a first valve core oil groove, a second valve core oil groove which are sequentially arranged clockwise , the third valve core oil groove and the fourth valve core oil groove. When the valve core is at zero position, the valve core blocks the oil outlet and the oil return port; when the valve core rotates 3 to 30 degrees clockwise, the oil inlet, the first valve sleeve oil port, the first valve core oil groove, the third valve core oil groove, the second valve sleeve oil port and the first oil outlet are connected, and the oil return port, the fourth valve sleeve oil port, the fourth valve core oil groove, the second valve core oil groove, the third valve sleeve oil port and the second oil outlet are connected; when the valve core rotates counterclockwise, the oil inlet, the first valve sleeve oil port, the second valve core oil groove, the fourth valve core oil groove, the third valve sleeve oil port and the second oil outlet are connected, and the oil return port, the fourth valve sleeve oil port, the first valve core oil groove, the third valve core oil groove, the second valve sleeve oil port and the first oil outlet are connected.

[0008] Furthermore, the valve core is provided with a first valve core oil hole connecting the first valve core oil groove and the third valve core oil groove, and is also provided with a second valve core oil hole connecting the second valve core oil groove and the fourth valve core oil groove, and the first valve core oil hole and the second valve core oil hole both extend along the radial direction of the valve core and are arranged at intervals up and down in the axial direction of the valve core.

[0009] Furthermore, the valve core oil passage groove is an arc-shaped groove.

[0010] Furthermore, a motor mounting seat is provided on the valve body, a motor mounting slot is provided in the motor mounting seat, the driving motor is a forward and reverse motor, the forward and reverse motor includes a stator fixed in the motor mounting slot, a rotor rotatably assembled inside the stator and a motor shaft fixed inside the rotor, and the valve core is fixedly connected to the motor shaft to rotate with the rotor.

[0011] Furthermore, the rotation range of the driving motor is 30 degrees forward to 30 degrees reverse.

[0012] Furthermore, the driving motor includes a motor cover, an upper end cover is sealingly connected to the valve body, the upper end cover is located between the motor mounting seat and the valve body, and the upper end cover and the motor cover are located on the same side of the valve core, the motor cover is arranged at the end of the valve body to seal the inner cavity of the valve body, and a detection component for detecting the rotor position is provided between the motor cover and the valve core.

[0013] Furthermore, the detection assembly includes a permanent magnet fixed to the end of the motor shaft and a Hall sensor installed on the motor cover and arranged corresponding to the permanent magnet.

[0014] Furthermore, a lower corresponding rotation groove is provided in the valve body below the valve sleeve installation cavity, an upper rotation groove is provided in the upper end cover, the upper end of the valve core is rotationally assembled in the upper rotation groove, and the lower end of the valve core is rotationally assembled in the lower rotation groove. A torsion spring connected to the valve core is also provided in the lower rotation groove, and the torsion spring is used to generate a torsion force on the valve core in a circumferential direction to drive the valve core to rotate and restore to zero position.

[0015] The beneficial effects of a simplified rotary pressure distribution valve structure suitable for a fully active suspension of the present invention are:

[0016] 1. A simplified rotary pressure distribution valve structure suitable for a fully active suspension of the present invention adopts a one-in, two-out, one-return rotary pressure distribution valve integrated with a drive motor. The drive motor controls the forward and reverse rotation of the valve core to realize the switching of the oil circuit and the control of the opening of each valve port, thereby realizing continuous adjustment of the pressure of the upper and lower chambers of the shock absorber. Compared with the existing sliding valve structure, the rotary pressure distribution valve has low requirements on the cleanliness of the hydraulic oil, simple structure, and lower use and maintenance costs.

[0017] 2. The valve core of the present invention can automatically restore to zero position under the action of the torsion spring. When the valve core is at zero position, the valve core blocks the oil outlet and the oil return port, that is, the shock absorber is not connected to the external hydraulic system. The shock absorber has no pressurization and decompression process and can be regarded as an independent component working, thereby realizing the failure protection function.

[0018] 3. The arc-shaped oil groove of the valve core of the present invention is easy to machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] By reading the following detailed description with reference to the accompanying drawings, the above and other objects, features and advantages of the exemplary embodiments of the present invention will become readily understood. In the accompanying drawings, several embodiments of the present invention are shown in an exemplary and non-limiting manner, and the same or corresponding reference numerals represent the same or corresponding parts, wherein:

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 is a cross-sectional view of a top view of the present invention;

[0022] Figure 3 This is a schematic diagram of the state where the valve core is at zero position;

[0023] Figure 4 This is a schematic diagram of the state where the valve core rotates 30 degrees clockwise;

[0024] Figure 5 This is a schematic diagram of the state where the valve core rotates 30 degrees counterclockwise;

[0025] Figure 6 A sectional view of the front view of the present invention;

[0026] Figure 7 It is a structural schematic diagram of the valve core;

[0027] Figure 8 is a schematic diagram of the structure of the valve sleeve;

[0028] Fig. 9 It is a structural schematic diagram of the valve body;

[0029] Fig.10 It is the assembly diagram of valve body and shock absorber;

[0030] Fig.11 for Fig.10 Middle BB section view;

[0031] Fig.12 for Fig.10 Middle AA section view.

[0032] Description of reference numerals:

[0033] 1. shock absorber; 2. oil inlet; 3. valve body; 4. oil return port; 5. sensor cover; 6. motor cover; 7. hall sensor; 8. permanent magnet; 9. stator; 10. rotor; 11. motor shaft; 12. upper rolling bearing; 13. valve core; 14. valve sleeve; 15. lower rolling bearing; 16. torsion spring; 17. first valve sleeve oil port; 18. fourth valve sleeve oil port; 19. third valve sleeve oil port; 20. second valve core oil slot; 21. third valve core oil slot; 22. fourth valve core oil slot; 23. first valve core oil slot; 24. second valve core oil slot Oil hole; 25, second oil outlet; 26, second valve sleeve oil port; 27, first oil outlet; 28, coupling cylinder; 29, sealing groove; 30, first valve core oil hole; 31, first sealing disk; 32, core body; 33, second sealing disk; 34, rotating column; 35, upper end cover; 36, motor mounting seat; 37, working cylinder; 38, oil storage cylinder; 39, second oil passage; 40, first oil passage; 41, valve sleeve mounting cavity; 42, mounting interface; 43, first process hole; 44, second process hole; 45, third process hole; 46, fourth process hole. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0035] Various non-limiting embodiments of the present invention are described in detail below. Any number of elements in the accompanying drawings is for illustration and not for limitation, and any naming is only for distinction and does not have any limiting meaning. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0036] The present invention provides a specific embodiment of a simplified rotary pressure distribution valve structure suitable for a fully active suspension:

[0037] like Figure 1 and Figure 2 As shown, a simplified rotary pressure distribution valve structure suitable for a fully active suspension includes a rotary pressure distribution valve and a drive motor that are integrated together. The rotary pressure distribution valve is used to connect a hydraulic oil pump and a shock absorber 1 in the fully active suspension system.

[0038] Specifically, Figure 1 and Figure 2 As shown, the rotary pressure distribution valve includes a valve body 3 , a valve core 13 and a valve sleeve 14 .

[0039] In this embodiment, for the convenience of description, the height direction of the valve body 3 is defined as the up-down direction, the width direction is defined as the front-back direction, and the length direction is defined as the left-right direction.

[0040] like Figure 1-Figure 3 , Figure 6 , Figure 9-12 As shown, the valve body 3 is provided with a valve sleeve installation cavity 41 and a mounting interface 42 for fixing the cylinder of the shock absorber 1 located on the right side of the valve sleeve installation cavity 41. The shock absorber 1 is located on the mounting interface 42. The shock absorber 1 includes a working cylinder 37 and an oil storage cylinder 38. The valve body 3 is provided with an oil inlet 2, an oil return port 4, a first oil outlet 27 and a second oil outlet 25. The oil inlet 2 is located on the left side of the valve body 3 and is connected to the oil outlet end of the hydraulic oil pump. The oil return port 4 is located on the front side of the valve body 3 and is connected to the oil return end of the hydraulic oil pump. The first oil outlet 27 and the second oil outlet 25 are located on the right side of the valve body 3 and the first oil return port 4 is located on the rear side of the second oil return port 4. The first oil outlet 27 is connected to the upper cavity of the shock absorber 1 through the oil storage cylinder 38, and the second oil outlet 25 is connected to the lower cavity of the shock absorber 1. Two oil passages are provided in the valve body 3 for connecting the valve sleeve installation cavity 41 with the corresponding valve port of the shock absorber 1, namely the first oil passage 40 and the second oil passage 39. The first oil passage 40 is connected to the first oil outlet 27, and the second oil passage 39 is connected to the second oil outlet 25. The right end of the valve sleeve 14 is also provided with a blocked first process hole 43, a second process hole 44 and a third process hole 45, and the bottom end of the valve sleeve 14 is provided with a blocked fourth process hole 46. The first oil passage 40 is connected to the first process hole 43, the second process hole 44 and the fourth process hole 46, and the second oil passage 39 is connected to the third process hole 45. The oil outlet, the oil return port 4, the first oil outlet 27 and the second oil outlet 25 are all circular hole structures. Of course, other shapes, such as square holes, waist-shaped holes, etc., can also be used. An upper end cover 35 is provided on the valve body 3 above the valve sleeve installation cavity 41 to seal the valve sleeve installation cavity 41.

[0041] like Figure 3 , Figure 6 and Figure 8-Figure 12As shown, the valve sleeve 14 is columnar and fixed in the valve sleeve installation cavity 41, and the interior of the valve sleeve 14 is hollow. The valve sleeve 14 is provided with a first valve sleeve oil port 17, a second valve sleeve oil port 26, a third valve sleeve oil port 19 and a fourth valve sleeve oil port 18 which are distributed in sequence in the clockwise direction of its circumference. The oil inlet 2 is connected to the first valve sleeve oil port 17, the oil return port 4 is connected to the fourth valve sleeve oil port 18, the second valve sleeve oil port 26, the first oil passage 40, the first oil outlet 27 and the oil storage cylinder 38 are connected to the upper cavity of the shock absorber 1, and the third valve sleeve oil port 19, the second oil passage 39 and the second oil outlet 25 are connected to the lower cavity of the shock absorber 1. The first valve sleeve oil port 17 and the fourth valve sleeve oil port 18 are waist-shaped structures, and the second valve sleeve oil port 26 and the third valve sleeve oil port 19 are round hole shapes. Of course, other shapes may also be used, such as the first valve sleeve oil port 17 and the fourth valve sleeve oil port 18 using round holes, square holes and the like, and the second valve sleeve oil port 26 and the third valve sleeve oil port 19 using waist-shaped holes, square holes and the like.

[0042] like Figure 3 , Figure 6 , Figure 7 and Figure 9-12As shown, the valve core 13 is cylindrical and rotatably assembled in the valve sleeve 14. The valve core 13 includes a coupling cylinder 28, a first sealing disc 31, a core body 32, a second sealing disc 33 and a rotating column 34 which are connected together from top to bottom and are coaxial. An annular sealing groove 29 is provided on the first sealing disc 31 and the second sealing disc 33, and a sealing ring is installed in each sealing groove 29. A lower rotating groove is provided in the valve body 3 below the valve sleeve installation cavity 41, and an upper rotating groove is provided in the upper end cover 35. The upper rotating groove and the lower rotating groove correspond to each other in the up-down direction. The coupling cylinder 28 is located in the upper rotating groove, and the rotating column 34 is located in the lower rotating groove. The coupling cylinder 28 and the rotating column 34 are rotatably assembled with the valve body 3 through the upper rolling bearing 12 and the lower rolling bearing 15, respectively. The core body 32 is provided with a first valve core oil groove 23, a second valve core oil groove 20, a third valve core oil groove 21 and a fourth valve core oil groove 22 distributed in sequence in a clockwise direction of its circumference, a first valve core oil hole 30 is provided between the first valve core oil groove 23 and the third valve core oil groove 21 to connect the two, a second valve core oil hole 24 is provided between the second valve core oil groove 20 and the fourth valve core oil groove 22 to connect the two, and the first valve core oil hole 30 and the second valve core oil hole 24 both extend in the radial direction of the valve core 13 and are arranged at intervals up and down in the axial direction of the valve core 13. When the valve core 13 is at zero position, the valve core 13 blocks the oil inlet 2 and the oil return port 4; when the valve core 13 rotates 3 to 30 degrees clockwise, the oil inlet 2, the first valve sleeve oil port 17, the first valve core oil groove 23, the first valve core oil hole 30, the third valve core oil groove 21, the second valve sleeve oil port 26 and the first oil outlet 27 are connected, and the oil return port 4, the fourth valve sleeve oil port 18, the fourth valve core oil groove 22, the third valve sleeve oil port 19 and the second oil outlet 25 is connected; when the valve core 13 rotates 3 to 30 degrees counterclockwise, the oil inlet 2, the first valve sleeve oil port 17, the second valve core oil groove 20, the second valve core oil hole 24, the fourth valve core oil groove 22, the third valve sleeve oil port 19 and the second oil outlet 25 are connected, and the oil return port 4, the fourth valve sleeve oil port 18, the first valve core oil groove 23, the first valve core oil hole 30, the third valve core oil groove 21, the second valve sleeve oil port 26 and the first oil outlet 27 are connected. The first valve core oil groove 23, the second valve core oil groove 20, the third valve core oil groove 21 and the fourth valve core oil groove 22 are all arc-shaped structures. Of course, other shapes, such as rectangles, can also be used.

[0043] like Figure 1 , Figure 2 and Figure 7As shown, a motor mounting seat 36 is provided on the valve body 3 above the upper end cover 35, and a motor mounting groove is provided in the motor mounting seat 36, and the motor mounting groove is separated from the valve sleeve 14 by the upper end cover 35. The driving motor is a forward and reverse motor, which includes a motor cover 6, a stator 9, a rotor 10 and a motor shaft 11. The stator 9 is fixed in the motor mounting groove, including but not limited to interference, welding, riveting, press riveting, etc., the rotor 10 is rotatably assembled inside the stator 9, the motor shaft 11 is fixed inside the rotor 10, and the coupling cylinder 28 is fixedly connected to the motor shaft 11 so that the valve core 13 rotates with the rotor 10, and the connection method includes but is not limited to interference, welding, riveting, press riveting, etc. The motor cover 6 is fixed at the upper end of the motor mounting seat 36, and a detection component for detecting the position of the rotor 10 is provided on the motor cover 6. In this application, the detection component includes a permanent magnet 8 fixed at the upper end of the motor shaft 11 and a Hall sensor 7 installed on the motor cover 6 and arranged corresponding to the permanent magnet 8. The sensor cover 5 of the Hall sensor 7 is connected to the motor cover 6 by bolts. The Hall sensor 7 and the permanent magnet 8 are used in combination to accurately identify the position information of the rotor 10, so as to monitor the rotation angle and return position of the valve core 13 driven by the rotor 10, thereby ensuring that the rotary pressure distribution valve can work continuously.

[0044] like Figure 2 As shown, a torsion spring 16 connected to the rotating column 34 is provided in the lower rotating groove, including but not limited to interference fit, welding, rotary riveting, press riveting, etc. The torsion spring 16 is used to generate a torsion force in the circumferential direction on the valve core 13 to drive the valve core 13 to rotate and restore the zero position. When the valve core 13 is at the zero position, the valve core 13 blocks the oil outlet and the oil return port 4, the shock absorber 1 is not connected to the external hydraulic system, and the shock absorber 1 can be regarded as an independent component without pressurization and decompression process, thereby realizing the failure protection function.

[0045] The rotation range of the forward and reverse motor is 30 degrees forward to 30 degrees reverse. When it rotates 30 degrees forward or reverse, the oil inlet 2 is in the largest opening state.

[0046] The working process of the present invention is as follows:

[0047] In practical applications, the simplified rotary pressure distribution valve structure of the present invention suitable for full-active suspension is connected to the controller of the full-automatic suspension system by the electrical part of the rotary pressure distribution valve. After receiving the current output by the controller, the drive motor inside the rotary pressure distribution valve drives the valve core 13 fixedly connected to the motor shaft 11 to rotate. When the valve core 13 is at zero position, the valve core 13 blocks the oil outlet and the oil return port 4, that is, the shock absorber 1 is not connected to the external hydraulic system. The shock absorber 1 can be regarded as an independent component without the pressurization and decompression process, thereby realizing the failure protection function. When the valve core 13 rotates clockwise by 3 to 30 degrees, an oil circuit is formed between the oil inlet 2 and the first oil outlet 27, and the high-pressure oil output by the hydraulic oil pump and the oil storage device of the full-automatic suspension system flows through the oil inlet 2 through the first valve sleeve oil port 17, the first valve core oil groove 23, and the first valve core oil groove 24. The oil hole 30, the third valve core oil groove 21, the second valve sleeve oil port 26, the first oil passage 40 and the first oil outlet 27, flow from the first oil outlet 27 into the oil storage cylinder 38 and then into the upper chamber of the shock absorber 1, and an oil circuit is formed between the oil return port 4 and the second oil outlet 25. The low-pressure oil in the lower chamber of the shock absorber 1 passes through the second oil outlet 25, the second oil passage 39, the third valve sleeve oil port 19, the fourth valve core oil groove 22, the fourth valve sleeve oil port 18 and the oil return port 4, and flows from the oil return port 4 back to the fully automatic In the hydraulic oil pump and oil storage device of the suspension system; when the valve core 13 rotates 3 to 30 degrees counterclockwise, an oil circuit is formed between the oil inlet 2 and the second oil outlet 25, and the high-pressure oil output from the hydraulic oil pump and the oil storage device of the fully automatic suspension system flows through the oil inlet 2 through the first valve sleeve oil port 17, the second valve core oil groove 20, the second valve core oil hole 24, the fourth valve core oil groove 22, the third valve sleeve oil port 19, the second oil passage 39 and the second oil outlet 25, and flows from the oil inlet 2 into the lower cavity of the shock absorber 1. An oil circuit is formed between the oil return port 4 and the first oil outlet 27. The low-pressure oil in the upper chamber of the shock absorber 1 passes through the first oil outlet 27, the first oil passage 40, the second valve sleeve oil port 26, the third valve core oil groove 21, the first valve core oil hole 30, the first valve core oil groove 23, the fourth valve sleeve oil port 18 and the oil return port 4, and flows back to the hydraulic oil pump and the oil storage device of the full-automatic suspension system from the oil return port 4 to realize the circulation of the oil; the valve core 13 can automatically return to the zero position under the action of the torsion spring 16 after rotation.

[0048] The simplified rotary pressure distribution valve structure suitable for full active suspension of the present invention adopts a one-in, two-out, one-return rotary pressure distribution valve integrated with a drive motor, and controls the forward and reverse rotation of the valve core 13 by the drive motor to realize the switching of the oil circuit and the control of the opening of each valve port, thereby realizing continuous adjustment of the pressure of the upper and lower chambers of the shock absorber 1, thereby controlling the shock absorber 1 to provide a continuous and adjustable damping force for the vehicle body. Compared with the existing slide valve structure, the rotary pressure distribution valve has low requirements on the cleanliness of the hydraulic oil, simple structure, and lower use and maintenance costs.

[0049] According to the above description of this specification, those skilled in the art may also understand that the terms used below, such as "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., which indicate orientation or positional relationships, are based on the orientation or positional relationships shown in the drawings of this specification, and are only for the purpose of facilitating the explanation of the scheme of the present invention and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operate in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms cannot be understood or interpreted as limitations on the scheme of the present invention.

[0050] In addition, in the description of this specification, “plurality” means at least two, for example, two, three or more, etc., unless otherwise clearly and specifically defined.

[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A simplified rotary pressure distribution valve structure suitable for a fully active suspension, characterized in that: It includes a rotary pressure distribution valve and a drive motor which are integrated and installed together; The rotary pressure distribution valve comprises a valve body, a valve sleeve and a valve core. The valve body is provided with a valve sleeve installation cavity and a mounting interface for fixing the shock absorber cylinder located beside the valve sleeve installation cavity. The valve body is provided with two pump body oil ports for connecting to a hydraulic pump, and two shock absorber oil ports for connecting to an upper cavity and a lower cavity of the shock absorber respectively. The valve body is provided with two oil passages for connecting the valve sleeve installation cavity with the corresponding shock absorber oil ports respectively. The valve sleeve is fixed in the valve sleeve installation cavity, and the valve sleeve is provided with four valve sleeve oil ports arranged at intervals in the circumferential direction and respectively connected with the two pump body oil ports and the two shock absorber oil ports in a one-to-one correspondence, and the interior of the valve sleeve is hollow; The valve core is coaxially and rotatably assembled in the valve sleeve. Four valve core oil passage grooves are arranged in the circumferential direction of the valve core and are used to match the oil passage port of the valve sleeve. The valve core oil passage grooves extend along the axial direction of the valve core. Two valve core oil passage grooves arranged opposite to each other are connected. The driving motor is installed on the valve body and is in driving connection with the valve core to drive the valve core to rotate; during its rotation stroke, the valve core can connect or block the oil path between the pump body oil port and the corresponding valve sleeve oil port, the valve core oil groove and the corresponding shock absorber oil port.

2. A simplified rotary pressure distribution valve structure suitable for a fully active suspension according to claim 1, characterized in that: The two pump body oil ports are respectively an oil inlet and an oil return port, the two shock absorber oil ports are respectively a first oil outlet and a second oil outlet, the two oil circuit channels are respectively a first oil circuit channel and a second oil circuit channel, the valve sleeve oil port comprises a first valve sleeve oil port, a second valve sleeve oil port, a third valve sleeve oil port and a fourth valve sleeve oil port which are sequentially distributed clockwise, the oil inlet is connected with the first valve sleeve oil port, the oil return port is connected with the fourth valve sleeve oil port, the first oil outlet, the second valve sleeve oil port and the first oil circuit channel are connected with the upper cavity of the shock absorber, the second oil outlet, the third valve sleeve oil port and the second oil circuit channel are connected with the lower cavity of the shock absorber; the valve core oil groove comprises a first valve core oil groove, a second valve core oil groove, a third valve core oil groove which are sequentially distributed clockwise The valve core oil groove and the fourth valve core oil groove, when the valve core is at zero position, the valve core blocks the oil outlet and the oil return port; when the valve core rotates 3 to 30 degrees clockwise, the oil inlet, the first valve sleeve oil port, the first valve core oil groove, the third valve core oil groove, the second valve sleeve oil port and the first oil outlet are connected, and the oil return port, the fourth valve sleeve oil port, the fourth valve core oil groove, the second valve core oil groove, the third valve sleeve oil port and the second oil outlet are connected; when the valve core rotates counterclockwise, the oil inlet, the first valve sleeve oil port, the second valve core oil groove, the fourth valve core oil groove, the third valve sleeve oil port and the second oil outlet are connected, and the oil return port, the fourth valve sleeve oil port, the first valve core oil groove, the third valve core oil groove, the second valve sleeve oil port and the first oil outlet are connected.

3. A simplified rotary pressure distribution valve structure suitable for a fully active suspension according to claim 2, characterized in that: The valve core is provided with a first valve core oil through hole connecting the first valve core oil through groove and the third valve core oil through groove, and is also provided with a second valve core oil through hole connecting the second valve core oil through groove and the fourth valve core oil through groove. The first valve core oil through hole and the second valve core oil through hole both extend along the radial direction of the valve core and are arranged at intervals up and down in the axial direction of the valve core.

4. A simplified rotary pressure distribution valve structure suitable for a fully active suspension according to claim 3, characterized in that: The valve core oil passage groove is an arc-shaped groove.

5. A simplified rotary pressure distribution valve structure suitable for a fully active suspension according to claim 4, characterized in that: A motor mounting seat is provided on the valve body, a motor mounting slot is provided in the motor mounting seat, the driving motor is a forward and reverse motor, the forward and reverse motor includes a stator fixed in the motor mounting slot, a rotor rotatably assembled inside the stator and a motor shaft fixed inside the rotor, and the valve core is fixedly connected to the motor shaft to rotate with the rotor.

6. A simplified rotary pressure distribution valve structure suitable for a fully active suspension according to claim 5, characterized in that: The rotation range of the driving motor is 30 degrees forward to 30 degrees reverse.

7. A simplified rotary pressure distribution valve structure suitable for a fully active suspension according to claim 6, characterized in that: The driving motor includes a motor cover, an upper end cover is sealingly connected to the valve body, the upper end cover is located between the motor mounting seat and the valve body, and the upper end cover and the motor cover are located on the same side of the valve core, the motor cover is arranged at the end of the valve body to seal the inner cavity of the valve body, and a detection component for detecting the rotor position is provided between the motor cover and the valve core.

8. The simplified rotary pressure distribution valve structure suitable for a fully active suspension according to claim 7, characterized in that: The detection assembly comprises a permanent magnet fixed on the end of the motor shaft and a Hall sensor installed on the motor cover and arranged corresponding to the permanent magnet.

9. A simplified rotary pressure distribution valve structure suitable for a fully active suspension according to any one of claims 7 or 8, characterized in that: The valve body is provided with a lower rotating groove below the valve sleeve installation cavity, and the upper end cover is provided with an upper rotating groove, the upper rotating groove and the lower rotating groove correspond to each other in the up and down directions, the upper end of the valve core is rotatably assembled in the upper rotating groove, and the lower end of the valve core is rotatably assembled in the lower rotating groove, and a torsion spring connected to the valve core is also provided in the lower rotating groove, and the torsion spring is used to generate a torsion force on the valve core in a circumferential direction to drive the valve core to rotate and restore the zero position.

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