Double-air-chamber energy accumulator and hydro-pneumatic suspension device

Abstract

The invention relates to a double-air-chamber energy accumulator and an oil-gas suspension device, and belongs to the field of heavy oil-gas suspension systems. The device is composed of an upper connecting assembly, a middle working assembly, a lower connecting assembly, a gas adjusting assembly and a hydraulic oil adjusting assembly. The upper connecting assembly comprises an upper lifting lug, a piston rod and a guide sleeve; the middle working assembly comprises a cylinder body, a piston, a hydraulic oil middle cavity and a lower floating piston; the lower connecting assembly comprises an anti-vibration pad, a lower lifting lug and a lower inflation and deflation valve hole. The gas adjusting assembly comprises an upper inflation and deflation valve hole, a nitrogen upper cavity and a nitrogen lower cavity and is used for adjusting internal gas pressure to achieve buffering and energy storage. The hydraulic oil adjusting assembly comprises a hydraulic oil upper cavity, a hydraulic oil lower cavity, a throttling valve, a one-way flow valve and the like to adjust the flow and the flow direction of hydraulic oil to change the damping characteristic. The space utilization rate is improved by integrating the cylinder body, the functions of buffering, damping and the like are achieved by controlling oil and gas flow in the cylinder body, and the vehicle running smoothness and control stability can be effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of heavy-duty oil-gas suspension systems, and in particular to a double-chamber accumulator and an oil-gas suspension device. Background Art

[0002] As a connecting mechanism between the vehicle body and the wheels, the oil-gas suspension can mitigate ground impact and attenuate vehicle body vibration during vehicle driving, playing an important role in improving ride comfort and comfort. Especially in the field of heavy-duty vehicles, such as wide-body mining vehicles, the operating environment is extremely harsh and they need to frequently deal with heavy loads and rugged road conditions. Traditional suspension systems mostly use a passive oil-gas suspension and energy storage device separate design, and its suspension damping ratio cannot change according to the change of spring load; independent components occupy a large amount of chassis space, which is easy to cause component interference and affect the adaptive layout of enhanced protective devices; on the other hand, the two rely on pipeline connection, and the energy transfer is affected by pipeline resistance and the sealing of the connection point, resulting in serious loss, causing the suspension system to respond slowly and unable to buffer the severe impact of the road in time, affecting the vehicle's handling stability and driving comfort. Summary of the invention

[0003] The purpose of the present invention is to provide a dual-chamber accumulator and an oil-gas suspension device, which improve the problems of low integration and immutable damping by adopting an integrated combined design, thereby improving the vehicle's driving smoothness and handling stability.

[0004] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a dual-chamber accumulator and an oil-gas suspension device, comprising: an upper connecting component, a middle working component, and a lower connecting and adjusting component.

[0005] Preferably, the upper connecting assembly:

[0006] An upper hanging lug 1 is used to connect with a vehicle frame or other external structure to achieve upper suspension of the suspension;

[0007] A piston rod 2, one end of which is connected to the upper lifting ear 1, for transmitting external force;

[0008] The guide sleeve 3 is sleeved on the piston rod 2 and is used for guiding the movement of the piston rod 2 .

[0009] Preferably, the middle working component:

[0010] The cylinder body 4 is used to accommodate and support the internal components and constitute the main structure of the suspension;

[0011] The piston 5 is disposed in the cylinder 4 and can reciprocate in the axial direction in the cylinder 4 to divide the interior of the cylinder 4 into different chambers;

[0012] The hydraulic oil upper chamber 13 and the hydraulic oil middle chamber 6 are located at the upper and lower sides of the piston 5. When the piston 5 moves, the hydraulic oil circulates in the chamber to achieve energy transfer and buffering;

[0013] The lower floating piston 7 is arranged at the lower part of the cylinder body 4 to assist the piston 5 in controlling the flow and regulating the pressure of the hydraulic oil.

[0014] Preferably, the lower connection and adjustment assembly:

[0015] The anti-vibration pad 8 is located at the bottom of the suspension and is used for buffering and shock absorption to reduce the impact on the bottom;

[0016] A lower lifting lug 9 is used to connect with the axle or other external structure to achieve the lower suspension of the suspension;

[0017] The lower charging and discharging valve hole 19 is used for charging and discharging the gas in the suspension.

[0018] Preferably, the gas regulating assembly comprises:

[0019] The upper charging and discharging valve hole 10 cooperates with the lower charging and discharging valve hole 19 to charge and discharge the gas in the suspension and adjust the internal gas pressure;

[0020] The nitrogen upper chamber 11 and the nitrogen lower chamber 18 are filled with nitrogen, and buffering and energy storage are achieved through compression and expansion of the gas during the operation of the suspension.

[0021] Preferably, the hydraulic oil regulating assembly comprises:

[0022] The hydraulic oil upper chamber 13, the hydraulic oil middle chamber 6 and the hydraulic oil lower chamber 17, when the piston 5 and the upper and lower floating pistons move, the hydraulic oil flows between these chambers to achieve energy transfer and buffering;

[0023] The throttle valve A14, the flow valve B16 and the one-way flow valve C20 are used to adjust the flow of the hydraulic oil, thereby adjusting the damping characteristics of the suspension to adapt to different working conditions;

[0024] The oil filling and discharging valve hole 15 is adapted to an external oil filling and discharging device, through which the oil-gas suspension can be conveniently and efficiently filled and discharged, and the sealing and reliability of the oil filling and discharging process can be ensured, thereby ensuring the normal operation and stable performance of the oil-gas suspension.

[0025] Preferably, the piston 5, the lower floating piston 7 and the upper floating piston 12 reciprocate in the cylinder body 4 to divide different chambers, and control the flow of hydraulic oil and gas through their movement to achieve the buffering, shock absorption and energy conversion functions of the suspension.

[0026] Preferably, the cylinder body 4 is made of a high-strength material in one piece and can withstand the pressure of the internal hydraulic oil and gas.

[0027] Preferably, the piston rod 2 is detachably connected to the upper lifting ear 1 to facilitate installation and maintenance.

[0028] Preferably, the guide sleeve 3 is made of wear-resistant material to ensure long-term and effective guiding effect on the piston rod 2.

[0029] Preferably, the initial pressure of nitrogen in the nitrogen upper chamber 11 and the nitrogen lower chamber 18 can be set and adjusted according to the vehicle type and operating conditions.

[0030] In the above technical solution, the present invention provides a dual-chamber accumulator and an oil-gas suspension device, which have the following beneficial effects:

[0031] 1. The present invention integrates the energy storage device and the suspension into one, reduces external connection pipelines, avoids potential risks caused by pipeline aging and damage, and saves chassis space.

[0032] 2. The present invention adjusts various dampings through different oil circulation control methods. It can quickly adjust the suspension damping according to real-time road conditions, vehicle speed, load and other factors, thereby improving vehicle control stability and driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0034] Figure 1 A schematic structural diagram of a combined oil-gas suspension provided by an example of the present invention;

[0035] Figure 2 A structural schematic diagram of the extension stroke of a combined oil-gas suspension provided by an example of the present invention;

[0036] Figure 3 A structural schematic diagram of a combined oil-gas suspension compression stroke provided for an example of the present invention.

[0037] Reference numerals:

[0038] 1. Upper lifting lug; 2. Piston rod; 3. Guide sleeve; 4. Cylinder body; 5. Piston; 6. Hydraulic oil middle chamber; 7. Lower floating piston; 8. Shockproof pad; 9. Lower lifting lug; 10. Upper charging and discharging valve hole; 11. Nitrogen upper chamber; 12. Upper floating piston; 13 Hydraulic oil upper chamber; 14. Throttle valve A; 15. Oil charging and discharging valve hole; 16. Circulation valve B; 17. Hydraulic oil lower chamber; 18. Nitrogen lower chamber; 19. Lower charging and discharging valve hole; 20. One-way circulation valve C. DETAILED DESCRIPTION

[0039] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0040] like Figure 1 As shown, the present invention provides a dual-chamber accumulator and an oil-gas suspension device, including: an upper connecting component, a middle working component, and a lower connecting and adjusting component.

[0041] The upper connection component includes: an upper lifting ear 1, which is used to connect to a vehicle frame or other external structure to realize the upper suspension of the suspension; a piston rod 2, one end of which is connected to the upper lifting ear 1 and is used to transmit external force; a guide sleeve 3, which is sleeved on the piston rod 2 and is used to guide the movement of the piston rod 2.

[0042] The middle working component: the cylinder body 4 is used to accommodate and support internal components and constitute the main structure of the suspension; the piston 5 is arranged in the cylinder body 4 and can reciprocate axially in the cylinder body 4 to divide the inside of the cylinder body 4 into different chambers; the hydraulic oil upper chamber 13 and the hydraulic oil middle chamber 6 are located on the upper and lower sides of the piston 5. When the piston 5 moves, the hydraulic oil circulates in the chamber to achieve energy transfer and buffering; the lower floating piston 7 is arranged at the lower part of the cylinder body 4 to assist the piston 5 in controlling the flow and pressure regulation of the hydraulic oil.

[0043] The lower connection and adjustment components: the shock-absorbing pad 8 is located at the bottom of the suspension and is used for buffering and shock absorption to reduce the impact on the bottom; the lower lifting lug 9 is used to connect with the axle or other external structure to realize the lower suspension of the suspension; the lower charging and discharging valve hole 19 is used to charge and discharge the gas in the suspension.

[0044] The gas regulating assembly includes: an upper charging and discharging valve hole 10, which cooperates with a lower charging and discharging valve hole 19 to charge and discharge the gas in the suspension and adjust the internal gas pressure; a nitrogen upper chamber 11 and a nitrogen lower chamber 18, which are filled with nitrogen, and buffering and energy storage are achieved through gas compression and expansion during the operation of the suspension.

[0045] The hydraulic oil regulating assembly includes: an upper hydraulic oil chamber 13, a middle hydraulic oil chamber 6 and a lower hydraulic oil chamber 17. When the piston 5 and the floating piston move, the hydraulic oil flows between these chambers to achieve energy transfer and buffering; a throttle valve A14, a flow valve B16 and a one-way flow valve C20, which are used to adjust the flow of the hydraulic oil, thereby adjusting the damping characteristics of the suspension to adapt to different working conditions; an oil charging and discharging valve hole 15, which is compatible with an external oil charging and discharging device, through which the oil-gas suspension can be charged and discharged conveniently and efficiently, and the sealing and reliability of the oil charging and discharging process are guaranteed, thereby ensuring the normal operation and stable performance of the oil-gas suspension.

[0046] The piston 5, the lower floating piston 7 and the upper floating piston 12 reciprocate in the cylinder body 4 to divide different chambers, and control the flow of hydraulic oil through the opening and closing of the throttle valve A14, the oil charging and discharging valve hole 15 and the circulation valve B16 to adjust the damping and realize the buffering, shock absorption and energy conversion functions of the suspension.

[0047] like Figure 2 As shown, the present invention provides a structural schematic diagram of a double-chamber accumulator and an oil-gas suspension device extending stroke. When the suspension is in the extending stroke, the external force causes the upper lifting ear 1 to move upward relative to the lower lifting ear 9; since the piston rod 2 is connected to the upper lifting ear 1, the piston rod 2 also moves upward, and the piston rod 2 drives the piston 5 to move upward in the cylinder body 4. As the piston 5 moves upward, the volume of the hydraulic oil middle cavity 6 increases, and the volume of the hydraulic oil upper cavity 13 decreases. Under the action of the pressure difference, the hydraulic oil passes through the throttle valve A14 and the circulation valve A14. B flows to the hydraulic oil middle chamber 6. Due to the existence of the piston rod 2, the volume of the hydraulic oil upper chamber 13 is smaller than the volume of the hydraulic oil middle chamber 6, so that a vacuum is generated in the hydraulic oil middle chamber 6. Under the action of the vacuum and the pressure of the inert gas in the air chamber, the upper floating piston 12 and the lower floating piston 7 are respectively pushed to move toward the hydraulic oil middle chamber 6, thereby playing a role in replenishing fluid. By controlling the coordinated work of the throttle valve A14 and the one-way flow valve C20, the flow rate and flow velocity of the hydraulic oil are changed, thereby adjusting the damping characteristics during the extension of the suspension to consume energy and suppress jumping.

[0048] like Figure 3As shown, the present invention provides a structural schematic diagram of a double-chamber accumulator and a compression stroke of an oil-gas suspension device. When the suspension is in the compression stroke, the external force causes the upper lifting ear 1 to move downward relative to the lower lifting ear 9. Since the piston rod 2 is connected to the upper lifting ear 1, the piston rod 2 also moves downward, and the piston rod 2 drives the piston 5 to move downward in the cylinder body 4. As the piston 5 moves downward, the oil in the hydraulic oil middle cavity 6 is compressed, and the hydraulic oil flows to the hydraulic oil upper cavity 13 and the hydraulic oil lower cavity 17 respectively through the throttle valve A14, the one-way flow valve C and the flow valve B16. At the same time, under the action of the pressure difference, the hydraulic oil pushes the upper floating piston 12 and the lower floating piston 7 to move to the upper and lower sides respectively, and the inert gas in the upper air cavity and the lower air cavity is compressed to act as a spring, so that the suspension system can mitigate the impact.

[0049] The above only describes certain exemplary embodiments of the present invention by way of illustration. It is undoubted that, for a person skilled in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A double-chamber accumulator and an oil-gas suspension device, characterized in that: The oil-gas suspension comprises: an upper connection component, a middle working component, and a lower connection and adjustment component; The upper connection assembly comprises: an upper lifting ear (1) for connecting to a vehicle frame or other external structure to realize upper suspension of the suspension; a piston rod (2) with one end connected to the upper lifting ear (1) for transmitting external force; and a guide sleeve (3) sleeved on the piston rod (2) for guiding the movement of the piston rod (2); The middle working assembly comprises: a cylinder body (4) for accommodating and supporting internal components and forming the main structure of the suspension; a piston (5) arranged in the cylinder body (4) and capable of axially reciprocating in the cylinder body (4) to divide the interior of the cylinder body (4) into different chambers; an upper hydraulic oil chamber (13) and a middle hydraulic oil chamber (6) located on the upper and lower sides of the piston (5); when the piston (5) moves, the hydraulic oil circulates in the chamber to achieve energy transfer and buffering; a lower floating piston (7) arranged at the lower part of the cylinder body (4) to assist the piston (5) in controlling the flow and pressure of the hydraulic oil; The lower connection and adjustment component includes: a shock-absorbing pad (8) located at the bottom of the suspension, used for buffering and shock absorption to reduce the impact on the bottom; a lower hanging lug (9) used to connect with the axle or other external structure to achieve the lower suspension of the suspension; and a lower charging and discharging valve hole (19) used to charge and discharge the gas in the suspension.

2. A dual-chamber accumulator and oil-gas suspension device according to claim 1, characterized in that: The invention also comprises a gas regulating component, which comprises: an upper charging and discharging valve hole (10) which cooperates with a lower charging and discharging valve hole (19) to charge and discharge the gas in the suspension and regulate the internal gas pressure; a nitrogen upper chamber (11) and a nitrogen lower chamber (18) which are filled with nitrogen and realize buffering and energy storage through gas compression and expansion during the operation of the suspension.

3. A dual-chamber accumulator and oil-gas suspension device according to claim 1, characterized in that: The hydraulic oil regulating assembly also includes: an upper hydraulic oil chamber (13), a middle hydraulic oil chamber (6) and a lower hydraulic oil chamber (17). When the piston (5) and the upper and lower floating pistons move, the hydraulic oil flows between these chambers to achieve energy transfer and buffering; a throttle valve A (14), a flow valve B (16) and a one-way flow valve C (20), which are used to adjust the flow of the hydraulic oil, thereby adjusting the damping characteristics of the suspension to adapt to different working conditions; and an oil filling and discharge valve hole (15), which is compatible with an external oil filling and discharge device. Through the external oil filling and discharge device, the oil-gas suspension can be conveniently and efficiently filled and discharged, and the sealing and reliability of the oil filling and discharge process are guaranteed, thereby ensuring the normal operation and stable performance of the oil-gas suspension.

4. A dual-chamber accumulator and oil-gas suspension device according to claim 1, characterized in that: The piston (5), the lower floating piston (7) and the upper floating piston (12) reciprocate in the cylinder body (4) to divide different chambers, and control the flow of hydraulic oil and gas through their movement to achieve the buffering, shock absorption and energy conversion functions of the suspension.

5. A dual-chamber accumulator and oil-gas suspension device according to claim 1, characterized in that: The cylinder body (4) is made of high-strength material in one piece and is capable of withstanding the pressure of the internal hydraulic oil and gas.

6. A dual-chamber accumulator and oil-gas suspension device according to claim 1, characterized in that: The piston rod (2) is detachably connected to the upper lifting ear (1), which is convenient for installation and maintenance.

7. A dual-chamber accumulator and oil-gas suspension device according to claim 1, characterized in that: The guide sleeve (3) is made of wear-resistant material to ensure long-term and effective guiding effect on the piston rod (2).

8. A dual-chamber accumulator and oil-gas suspension device according to claim 2, characterized in that: The initial pressure of nitrogen in the nitrogen upper chamber (11) and the nitrogen lower chamber (18) can be set and adjusted according to the vehicle type and operating conditions.

Images