Valve control hydro-pneumatic spring device based on magnetorheological control

Abstract

The invention discloses a valve control hydro-pneumatic spring device based on magneto-rheological control. The valve control hydro-pneumatic spring device comprises an outer cylinder barrel, a piston rod, a magneto-rheological valve piston mechanism, a floating piston, a front sealing seat mechanism and a cylinder barrel rear end cover, the piston rod axially penetrates through the front sealing seat mechanism, the floating piston is arranged between the cylinder barrel rear end cover and the magneto-rheological valve piston mechanism, and different hydraulic oil circulation loops for the magneto-rheological valve piston mechanism to reciprocate are arranged on the magneto-rheological valve piston mechanism. According to the magneto-rheological valve control hydro-pneumatic spring in the technical scheme, hydraulic oil serves as a transmission medium, the magneto-rheological fluid serves as a control medium to control the size of the opening of the flow channel, then the dynamic control range of the magneto-rheological valve control hydro-pneumatic spring is enlarged, the magneto-rheological fluid serves as the control medium, and the demand quantity of the magneto-rheological valve control hydro-pneumatic spring is greatly reduced; compared with a damping element and an elastic element in a traditional seat suspension, the magneto-rheological hydro-pneumatic spring integrates elastic damping, the space of the seat suspension is saved, and arrangement is convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of vehicle damping, in particular to a valve-controlled oil-air spring device based on magneto-rheological control. BACKGROUND

[0002] As a key transportation tool for modern social production and life and daily travel, the comfort and safety of the car are always concerned. Especially for commercial vehicles, the suspension stiffness and damping of commercial vehicles are usually large and simple in structure, and the road conditions are more severe. Due to the unevenness of the road, the body of the vehicle vibrates violently, which greatly affects the comfort and safety of the driver. At the same time, the vibration frequency covers the sensitive frequency band of human body 4-6Hz, which seriously affects the driving experience of the operator.

[0003] The most typical seat suspension at present is a scissors seat suspension, which is mainly composed of elastic elements, damping elements, scissors supports and the like. The elastic elements and the damping elements are installed on the scissors supports, which can well reduce the energy brought by the vibration transmitted by the automobile chassis. However, it is difficult for commercial vehicles to improve the comfort and safety of the driver by optimizing the vehicle suspension. If air springs are used, the cost is high and the installation volume is large. The traditional magneto-rheological damper adopts a single flow channel, the volume flow is small, the flow rate is high, the viscous damping force is large in high-speed environment, so the demand for magneto-rheological fluid is large, resulting in high manufacturing cost.

[0004] Therefore, by combining the advantages of oil-air spring and magneto-rheological damper, a magneto-rheological valve-controlled oil-air spring structure with controllable stiffness and damping characteristics is proposed to solve the above problems. SUMMARY

[0005] Therefore, the magneto-rheological valve-controlled oil-air spring of the present application has the following advantages. The transmission medium is hydraulic oil, and the magneto-rheological fluid is used as the control medium to control the opening size of the flow channel, thereby effectively increasing the dynamic control range of the magneto-rheological valve-controlled oil-air spring. The demand for magneto-rheological fluid as a control medium is greatly reduced, thereby reducing the cost. Compared with the damping elements and elastic elements in the traditional seat suspension, the magneto-rheological oil-air spring has the advantages of integrating elastic damping, saving space of the seat suspension, and facilitating arrangement.

[0006] A valve-controlled oil-air spring device based on magneto-rheological control, comprising an outer cylinder, a piston rod reciprocally movable along the axis of the outer cylinder, a magneto-rheological valve piston mechanism connected with the end of the piston rod, a floating piston, a front seal seat mechanism, and a cylinder rear end cover; the piston rod axially penetrates the front seal seat mechanism, the floating piston is arranged between the cylinder rear end cover and the magneto-rheological valve piston mechanism, and the magneto-rheological valve piston mechanism is provided with different hydraulic oil circulation loops for reciprocating movement of the magneto-rheological valve piston mechanism.

[0007] Further, the magnetorheological valve piston mechanism comprises a piston upper end cover connected and installed at the end of the piston rod, a piston lower end cover, a piston cylinder barrel arranged between the piston upper end cover and the piston lower end cover, an outer valve body upper end cover, and a magnetorheological valve body assembly; the magnetorheological valve body assembly is arranged between the outer valve body upper end cover and the piston lower end cover, a upper end cover opening is formed in the middle of the outer valve body upper end cover, and the magnetorheological valve body assembly is used to open or close the upper end cover opening.

[0008] Further, the magnetorheological valve body assembly comprises an inner valve body upper end cover, an inner valve body lower end cover, an inner valve body sleeve assembly installed between the inner valve body upper end cover and the inner valve body lower end cover, and a valve core adjusting assembly axially penetrating the inner valve body upper end cover and the inner valve body lower end cover; the valve core adjusting assembly can be adjusted in the axial direction and is used to control the opening and closing of the upper end cover opening.

[0009] Further, the valve core adjusting assembly comprises a valve core shaft, an extrusion valve sheet sleeved on the valve core shaft, a return spring installed at the lower end of the valve core shaft, and a magnetorheological fluid sealing plug installed in the valve core shaft; the upper end of the valve core shaft penetrates the inner valve body upper end cover, the lower end of the valve core shaft penetrates the inner valve body lower end cover, and the lower end of the valve core shaft is provided with a valve core lower axial hole for installing the return spring; one end of the return spring abuts against the valve core lower axial hole, and the other end of the return spring is positioned and installed in cooperation with the piston lower end cover.

[0010] Further, the valve core shaft has a "T" shape structure in the axial cross section, a radial hole is formed in the middle of the valve core shaft, a valve core upper axial hole is formed in the upper end of the valve core shaft in the axial direction and communicates with the radial hole, the magnetorheological fluid sealing plug is installed in the valve core upper axial hole, a silica gel ring is installed on the upper end of the valve core shaft, and a locking rod is used in cooperation; the locking rod is installed in the valve core upper axial hole to press the silica gel ring and abut against the magnetorheological fluid sealing plug.

[0011] Further, the inner valve body sleeve assembly comprises an inner valve body sleeve, a coil retaining ring frame coaxially arranged with the inner valve body sleeve, and an excitation coil; the coil retaining ring frame and the inner valve body sleeve form an annular sealed area, and the excitation coil is arranged in the annular sealed area.

[0012] Further, it further comprises a one-way valve assembly, the one-way valve assembly comprises a one-way valve seat installed on the outer valve body upper end cover, a one-way valve sheet abutting against the outer valve body upper end cover, and a truncated cone spring, the truncated cone spring is arranged between the outer valve body upper end cover and the one-way valve sheet.

[0013] Further, the one-way valve assembly is arranged on the piston lower end cover, and a lower end cover installation groove is formed in the middle of the piston lower end cover.

[0014] Further, a cylinder barrel ring groove is formed on the outer circumference of the piston cylinder barrel, and a piston guide ring is installed in the cylinder barrel ring groove.

[0015] The beneficial effects of the present application are: the magnetic rheological valve controlled oil gas spring has hydraulic oil as transmission medium, and the magnetic rheological liquid is used as control medium to control the size of the flow passage opening, thereby effectively increasing the dynamic control range of the magnetic rheological valve controlled oil gas spring, and the magnetic rheological liquid as the control medium greatly reduces its own demand, compared with the damping element and elastic element in the traditional seat suspension, the magnetic rheological valve controlled oil gas spring has the functions of elastic damping and space saving, and is convenient to arrange. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present application will be further described below in combination with the drawings and embodiments:

[0017] Figure 1 It is the overall schematic diagram of the present application;

[0018] Figure 2 It is the schematic diagram of the magnetic rheological valve piston mechanism of the present application;

[0019] Figure 3 It is the schematic diagram of the internal excitation coil of the present application (arrow);

[0020] Figure 4 It is the schematic diagram of the hydraulic oil flow direction of the present application;

[0021] Figure 5 It is the schematic diagram of the upper end cover of the piston of the present application;

[0022] Figure 6 It is the schematic diagram of the lower end cover of the piston of the present application;

[0023] Figure 7 It is the schematic diagram of the upper end cover of the outer valve body of the present application;

[0024] Figure 8 It is the schematic diagram of the lower end cover of the inner valve body of the present application;

[0025] Figure 9 It is the schematic diagram of the upper end cover of the inner valve body of the present application;

[0026] Figure 10 It is the schematic diagram of the inner valve body sleeve of the present application. DETAILED DESCRIPTION

[0027] Figure 1 It is the overall schematic diagram of the present application; Figure 2 It is the schematic diagram of the magnetic rheological valve piston mechanism of the present application; Figure 3 It is the schematic diagram of the internal excitation coil of the present application (arrow); Figure 4 It is the schematic diagram of the hydraulic oil flow direction of the present application (the left and right arrows of the axis respectively represent different flow states of the hydraulic oil); Figure 5 It is the schematic diagram of the upper end cover of the piston of the present application;

[0028] Figure 6 Figure 1 is a schematic view of the lower end cover of the piston of the present application; Figure 7 Figure 2 is a schematic view of the upper end cover of the outer valve body of the present application; Figure 8 Figure 3 is a schematic view of the lower end cover of the inner valve body of the present application; Figure 9 Figure 4 is a schematic view of the upper end cover of the inner valve body of the present application; Figure 10 Figure 5 is a schematic view of the sleeve of the inner valve body of the present application, which is a valve-controlled oil-gas spring device based on magneto-rheological control, comprising an outer cylinder 104, a piston rod 110 reciprocating along the axial direction of the outer cylinder 104, a magneto-rheological valve piston mechanism 107 connected to the end of the piston rod 110, a floating piston 106, a front sealing seat mechanism 109, and a cylinder rear end cover 103; the piston rod 110 axially penetrates the front sealing seat mechanism 109, the floating piston 106 is arranged between the cylinder rear end cover 103 and the magneto-rheological valve piston mechanism 107, and the magneto-rheological valve piston mechanism is provided with different hydraulic oil circulation loops for reciprocating movement of the magneto-rheological valve piston mechanism; a high-pressure nitrogen gas chamber 105 is formed between the cylinder rear end cover 103 and the floating piston 106, an inflation valve 102 is installed on the cylinder rear end cover 103 and can inflate the high-pressure nitrogen gas chamber 105, a lifting lug 101 is installed on the rear end cover to facilitate the installation of other components, hydraulic oil 108 is installed between the floating piston 106 and the magneto-rheological valve piston mechanism 107 and between the magneto-rheological valve piston mechanism 107 and the front sealing seat mechanism 109, the piston rod 110 axially penetrates the front sealing seat mechanism 109 and is connected and installed with the magneto-rheological valve piston mechanism 107, a front lifting lug 111 is installed at the end of the piston rod 110 to facilitate the installation and connection of other structures, the magneto-rheological valve-controlled oil-gas spring of the present technical solution has transmission medium of hydraulic oil, and the magneto-rheological fluid as control medium controls the size of the flow passage opening, thereby effectively increasing the dynamic control range of the magneto-rheological valve-controlled oil-gas spring, the demand of the magneto-rheological fluid as control medium is greatly reduced, compared with the damping element and elastic element in the traditional seat suspension, the magneto-rheological valve-controlled oil-gas spring has the functions of elastic damping and space saving of the seat suspension, and is convenient to arrange.

[0029] In the embodiment, the magnetorheological valve piston mechanism 107 comprises a piston upper end cover 1 connected and installed at the end of the piston rod 107, a piston lower end cover 15, a piston cylinder 23 arranged between the piston upper end cover 1 and the piston lower end cover 15, an outer valve body upper end cover 5, and a magnetorheological valve body assembly; the magnetorheological valve body assembly is arranged between the outer valve body upper end cover 5 and the piston lower end cover 15, and the outer valve body upper end cover 5 is provided with an upper end cover opening 52 in the middle, and the magnetorheological valve body assembly is used to open or close the upper end cover opening 52. The piston lower end cover 15 is fixedly connected with the piston cylinder 23 through a locking screw 14, the piston upper end cover 1 is fixedly connected with the piston cylinder 23 and is provided with a piston upper end cover opening 1a on the piston upper end cover 1 for the circulation of hydraulic oil, the outer valve body upper end cover 5 is installed in the piston cylinder 23 through an elastic check ring 6, and the outer valve body upper end cover 5 is provided with a one-way valve assembly for the one-way flow of hydraulic oil, and the magnetorheological valve body assembly is arranged between the outer valve body upper end cover 5 and the piston lower end cover 15 to control and adjust the one-way flow of hydraulic oil.

[0030] In the embodiment, the magnetorheological valve body assembly comprises an inner valve body upper end cover 9, an inner valve body lower end cover 13, an inner valve body sleeve assembly installed between the inner valve body upper end cover 9 and the inner valve body lower end cover 13, and a valve core adjusting assembly axially penetrating the inner valve body upper end cover and the inner valve body lower end cover; the valve core adjusting assembly can be adjusted along the axial direction and is used to control the opening and closing of the upper end cover opening 52. The inner valve body upper end cover 9, the inner valve body lower end cover 13, and the inner valve body sleeve assembly form a space for filling the magnetorheological fluid 19 after installation, the upper end and the lower end of the valve core adjusting assembly correspondingly axially penetrate the inner valve body upper end cover 9 and the inner valve body lower end cover 13, respectively, and the valve core adjusting assembly can be adjusted along the axial direction to control the opening and closing of the upper end cover opening 52.

[0031] In this embodiment, the valve core adjusting assembly includes a valve core shaft 8 (including a T-shaped upper section and a lower section valve column 17, both of which are in a segmented structure as shown), an extrusion valve plate 18 sleeved on the valve core shaft 8, a reset spring 16 installed at the lower end of the valve core shaft 8, and a magneto-rheological fluid sealing plug 21 installed in the valve core shaft. The upper end of the valve core shaft 8 penetrates the upper end cover 9 of the inner valve body, the lower end of the valve core shaft 8 penetrates the lower end cover 13 of the inner valve body, and the lower end of the valve core shaft is provided with a valve core lower axial hole for installing the reset spring 16. One end of the reset spring 16 abuts against the valve core lower axial hole, and the other end of the reset spring 16 is positioned and installed in cooperation with the lower end cover 15 of the piston. The valve core shaft 8 is provided with a valve core lower axial hole at the lower end, which is convenient for installing the reset spring 16. The extrusion valve plate 18 is installed on the valve core shaft 8 at the middle position. The valve core shaft 8 adopts a two-section structure, which is convenient for installing the extrusion valve plate on the valve column 17, and the upper end is locked on the upper surface of the extrusion valve plate. After the internal magneto-rheological fluid 19 is affected by the excitation coil 20, the valve core shaft 8 moves in the axial direction and is subjected to damping effect. When the extrusion valve plate 18 is installed, the internal damping effect is greatly improved, the dynamic control range of damping control is greatly optimized, and it is more conducive to vibration control. The lower reset spring 16 provides elastic force for resetting the extrusion valve plate 18.

[0032] In this embodiment, the valve core shaft 8 is in a "T" shape structure in the axial direction (i.e. Figure 1 horizontal direction, Figure 2 vertical direction) cross section. The valve core shaft 8 is provided with a radial hole A at the middle position. The valve core shaft 8 is provided with a valve core upper axial hole communicating with the radial hole in the axial direction. The magneto-rheological fluid sealing plug 21 is installed in the valve core upper axial hole. The valve core upper axial hole is provided with a silica gel ring 7 and a locking rod used in cooperation. The locking rod is installed in the valve core upper axial hole to press the silica gel ring 7 and abut against the magneto-rheological fluid sealing plug 21. The valve core shaft 8 is provided with a valve core upper axial hole in the axial direction, and the valve core upper axial hole communicates with the radial hole A. The silica gel ring 7 is attached to the upper end surface of the valve core shaft 8 and is fixedly installed by a locking bolt. The silica gel ring 7 is used to reduce the impact generated when the valve core shaft 8 contacts the upper end cover 5 of the outer valve body. The flow of hydraulic oil pushes the silica gel ring 7 and the valve core shaft 8 downward, and then flows downward (at this time, the valve core shaft 8 is in a compressed state, and the upper end cover opening 52 is in an open state). By providing the radial hole A at the middle position of the valve core shaft 8, the flow area of the magneto-rheological fluid is increased, which is conducive to the flow of the magneto-rheological fluid. At the same time, by providing the axial hole and the radial hole A, the components can be installed in place, and the magneto-rheological fluid can be filled;

[0033] If the device cannot pass current due to uncontrollable factors, the device can continue to work as a normal oil and gas spring in the case of power failure, providing a passive damping mode. In the case of no magnetic field generated by the excitation coil, the device does not affect the use, and the device can be kept running through the reset spring 16 at the bottom, providing a layer of insurance for the device.

[0034] In the embodiment, the inner valve sleeve assembly includes an inner valve sleeve 11, a coil retaining ring frame 10 coaxially arranged with the inner valve sleeve, and an excitation coil 20. The coil retaining ring frame 10 and the inner valve sleeve form an annular closed area therebetween, and the excitation coil 20 is arranged in the annular closed area. After the coil retaining ring frame 10 and the inner valve sleeve 11 are fixedly connected and installed, an enclosed area is formed inside the coil retaining ring frame 10, facilitating the installation of the excitation coil. Of course, a wire discharging hole is provided on the corresponding component, facilitating the later lead-out of the excitation coil wire. The inner valve sleeve 11 is outwardly protruded in the circumferential direction to form sleeve protruding portions 11a, facilitating positioning and installation in cooperation with the remaining components. A sleeve recessed portion 11b is formed between the two sleeve protruding portions 11a, facilitating the flow of internal hydraulic oil.

[0035] In the embodiment, a one-way valve assembly is also included, which includes a one-way valve seat 2 installed on the upper end cover 5 of the outer valve body, a one-way valve plate 4 attached to the upper end cover 5 of the outer valve body, and a truncated cone spring 3 arranged between the upper end cover 5 of the outer valve body and the one-way valve plate 4. The one-way valve seat 2 has a T-shaped structure in the axial cross section and is fixedly installed in cooperation with the upper end cover 5 of the outer valve body. The upper end cover 5 is provided with an upper end cover opening 51, and the one-way valve plate 4 is installed to close the upper end cover opening 51. When the hydraulic oil flows in the specified direction, the one-way valve plate 4 is opened. Correspondingly, the lower end cover 15 of the piston is also provided with a one-way valve assembly of the same structure, and the opening direction thereof can be set according to the flow demand of the hydraulic oil. The lower end cover 13 of the inner valve body is provided with a lower end cover arc-shaped opening 131, and the upper end cover 9 of the inner valve body is provided with a corresponding upper end cover arc-shaped opening 91, facilitating the circulation of the internal hydraulic oil.

[0036] In the embodiment, the one-way valve assembly is arranged on the lower end cover 15 of the piston, and a lower end cover mounting groove 151 is recessed in the middle of the lower end cover 15. A positioning guide column is protruded in the middle of the lower end cover mounting groove 151, facilitating the installation in cooperation with the reset spring 16.

[0037] In the embodiment, a cylinder ring groove is formed on the outer circumference of the piston cylinder barrel, and a piston guide ring 12 is installed in the cylinder ring groove. The piston guide ring 12 is made of polytetrafluoroethylene material, facilitating the sliding of the component.

[0038] Finally, it is to be explained that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the purpose and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A valve-controlled oil-gas spring device based on magnetorheological control, characterized by: It includes an outer cylinder, a piston rod that can reciprocate along the axis of the outer cylinder, a magneto-rheological valve piston mechanism connected to the end of the piston rod, a floating piston, a front sealing seat mechanism and a rear end cover of the cylinder; the piston rod axially passes through the front sealing seat mechanism, the floating piston is arranged between the rear end cover of the cylinder and the magneto-rheological valve piston mechanism, and the magneto-rheological valve piston mechanism is provided with different hydraulic oil circulation circuits for the reciprocating motion of the magneto-rheological valve piston mechanism.

2. The valve-controlled oil-gas spring device based on magnetorheological control according to claim 1 is characterized in that: The magnetorheological valve piston mechanism includes a piston upper end cover and a piston lower end cover connected and installed in conjunction with the end of the piston rod, a piston cylinder arranged between the piston upper end cover and the piston lower end cover, an outer valve body upper end cover and a magnetorheological valve body assembly; the magnetorheological valve body assembly is arranged between the outer valve body upper end cover and the piston lower end cover, and an upper end cover opening is opened in the middle of the outer valve body upper end cover, and the magnetorheological valve body assembly is used to cooperate with the upper end cover opening to open or close.

3. The valve-controlled oil-gas spring device based on magnetorheological control according to claim 2 is characterized in that: The magnetorheological valve body assembly includes an inner valve body upper end cover, an inner valve body lower end cover, an inner valve body sleeve assembly installed between the inner valve body upper end cover and the inner valve body lower end cover, and a valve core adjustment assembly axially penetrated through the inner valve body upper end cover and the inner valve body lower end cover; the valve core adjustment assembly can be adjusted in an axial direction and is used to control the opening and closing of the upper end cover opening.

4. The valve-controlled oil-gas spring device based on magnetorheological control according to claim 3 is characterized in that: The valve core adjustment assembly includes a valve core shaft, an extruded valve disc sleeved on the valve core shaft, a return spring installed in conjunction with the lower end of the valve core shaft, and a magnetorheological fluid sealing plug installed in the valve core shaft; the upper end of the valve core shaft passes through the upper end cover of the inner valve body, the lower end of the valve core shaft passes through the lower end cover of the inner valve body, and the lower end of the valve core shaft is provided with a valve core lower axial hole for cooperating with the return spring installation, one end of the return spring is pressed against the valve core lower axial hole, and the other end of the return spring is positioned and installed in conjunction with the lower end cover of the piston.

5. The valve-controlled oil-gas spring device based on magnetorheological control according to claim 4 is characterized in that: The valve core shaft has an overall "T"-shaped structure along the axial cross-section, a radial hole is provided in the middle of the valve core shaft, an axial hole on the valve core connected to the radial hole is provided at the upper end of the valve core shaft along the axial direction, a magnetorheological fluid sealing plug is installed in the axial hole on the valve core, a silicone gasket and a locking rod used in conjunction therewith are installed at the upper end of the valve core shaft, the locking rod is installed in the axial hole on the valve core to press the silicone gasket and press against the magnetorheological fluid sealing plug.

6. The valve-controlled oil-gas spring device based on magnetorheological control according to claim 3 is characterized in that: The inner valve body sleeve assembly includes an inner valve body sleeve, a coil retaining ring frame coaxially arranged with the inner valve body sleeve, and an excitation coil. An annular sealed area is formed between the coil retaining ring frame and the inner valve body sleeve, and the excitation coil is arranged in the annular sealed area.

7. The valve-controlled oil-gas spring device based on magnetorheological control according to claim 1 is characterized in that: It also includes a one-way valve assembly, which includes a one-way valve seat installed on the upper end cover of the outer valve body, a one-way valve plate attached to the upper end cover of the outer valve body, and a truncated cone spring, wherein the truncated cone spring is arranged between the upper end cover of the outer valve body and the one-way valve plate.

8. The valve-controlled oil-gas spring device based on magnetorheological control according to claim 7 is characterized in that: The one-way valve assembly is arranged on the piston lower end cover, and the middle part of the piston lower end cover is recessed to form a lower end cover mounting groove.

9. The valve-controlled oil-gas spring device based on magnetorheological control according to claim 2, characterized in that: A cylinder ring groove is formed on the outer circumference of the piston cylinder, and a piston guide ring is installed in the cylinder ring groove.

Images