Active suspension actuator, system, adjusting method and vehicle

Abstract

The invention relates to the field of systems with energy accumulators, and discloses an active suspension actuator, a system, an adjusting method and a vehicle. The active suspension actuator comprises a cylinder barrel, an upper connector, a lower connector and a piston rod, a main cavity, an upper cavity and a lower cavity are formed in the cylinder barrel, and the upper cavity and the lower cavity are arranged at intervals in the vertical direction; upper through holes which are communicated with each other are formed between the main cavity and the upper cavity, an upper vibration absorption layer is arranged on the inner side wall of the upper cavity, lower through holes which are communicated with each other are formed between the main cavity and the lower cavity, and a lower vibration absorption layer is arranged on the inner side wall of the lower cavity; the upper connector is connected to the outer side of the cylinder barrel. The lower joint is connected to the outer side of the cylinder barrel; according to the active suspension, vibration absorption and buffering are carried out on flowing liquid, the influence of pressure pulsation on the piston rod is effectively reduced, active force output by the piston rod outwards is more accurate and stable, and therefore the performance of the active suspension is improved.

Description

Technical Field

[0001] The invention relates to a system with an accumulator, and in particular to an active suspension actuator, a system, a regulating method and a vehicle. Background Art

[0002] The active suspension system actively adjusts the vehicle's suspension characteristics by using sensors, controllers, actuators and hydraulic power supply devices to improve ride comfort and handling stability. Specifically, sensors are installed on the vehicle body to identify impacts and posture changes during vehicle driving. The controller calculates the size and direction of the main force required by the actuator through control algorithms and sensor information. Finally, the hydraulic power supply device converts electrical energy into hydraulic energy to drive the actuator to output the corresponding main force. The dynamically changing main force can reversely offset the impact caused by uneven road surfaces, while ensuring that the vehicle body maintains a stable posture under various road conditions.

[0003] In the active suspension system, the main power output by the actuator is mainly generated by the liquid pressure generated by the hydraulic pump inside the hydraulic power supply device. The liquid pressure acts on the cavity inside the actuator, provides pressure to the piston, and further generates the main power. Whether the main power output is accurate and rapid is inseparable from the liquid pressure. Since the rotation of the hydraulic pump will bring about periodic changes in the liquid pressure, that is, pressure pulsation, and the complex actuator structure and curved pipelines will further aggravate the hydraulic pulsation, after the hydraulic pulsation acts on the actuator, it will cause the actuator to generate a constantly fluctuating main power, further reducing the driving experience of the vehicle. Therefore, there is an urgent need for an active suspension system that can reduce the impact of hydraulic pulsation on the output of the main power. Summary of the invention

[0004] The purpose of the present invention is to provide an active suspension actuator, system, adjustment method and vehicle to solve one or more technical problems existing in the prior art and at least provide a beneficial choice or create conditions.

[0005] An active suspension actuator according to an embodiment of a first aspect of the present invention includes: A cylinder, wherein a main cavity, an upper cavity and a lower cavity are formed inside, the upper cavity and the lower cavity are arranged at intervals in the up-down direction, an upper through hole communicating with each other is arranged between the main cavity and the upper cavity, an upper vibration absorbing layer is arranged on the inner side wall of the upper cavity, a lower through hole communicating with each other is arranged between the main cavity and the lower cavity, and a lower vibration absorbing layer is arranged on the inner side wall of the lower cavity; An upper joint connected to the outer side of the cylinder, the upper joint and the upper cavity are communicated with each other, and the upper joint and the upper through hole are staggered with each other in the up-down direction; A lower joint connected to the outer side of the cylinder, the lower joint and the lower cavity are communicated with each other, and the lower joint and the lower through hole are staggered with each other in the up-down direction; The piston rod is located in the cylinder barrel, and the top end of the piston rod passes through the upper end of the cylinder barrel.

[0006] This technical solution has at least the following beneficial effects: the cylinder can be installed on the wheel, and the piston rod extends out of the top of the cylinder and is connected to the vehicle body, and the upper joint and the lower joint are connected to an external hydraulic energy supply device. When it is necessary to provide downward pressure on the piston rod, the hydraulic energy supply device inputs liquid into the upper cavity through the upper joint, and the liquid entering the upper cavity then enters the main cavity from the upper through hole, pressurizing the top of the main cavity, thereby providing downward pressure on the piston rod, so that the piston rod outputs a downward active force. In this process, the liquid passes through the upper vibration absorbing layer when flowing in the upper cavity, and the upper vibration absorbing layer absorbs the pressure fluctuations when the liquid flows through, which is beneficial to attenuating the pressure pulsation transmitted to the main cavity. Similarly, when it is necessary to provide downward pressure on the piston rod, When the pressure on the upper part is increased, the hydraulic energy supply device inputs liquid into the lower cavity through the lower joint. The liquid entering the lower cavity then enters the main cavity from the lower through hole, pressurizing the bottom of the main cavity, thereby providing upward pressure on the piston rod, so that the piston rod outputs an upward active force. In this process, the liquid passes through the lower vibration absorbing layer when flowing in the lower cavity. The lower vibration absorbing layer absorbs the pressure fluctuation of the liquid when flowing through, which is beneficial to attenuate the pressure pulsation transmitted to the main cavity. In this way, the flowing liquid is absorbed and buffered by the upper vibration absorbing layer and the lower vibration absorbing layer, which effectively reduces the influence of pressure pulsation on the piston rod, makes the active power output outward by the piston rod more precise and stable, thereby improving the active suspension performance.

[0007] According to some embodiments of the present invention, a buffer cavity is provided at the bottom of the cylinder, the main cavity and the buffer cavity are spaced apart in the up-down direction, an elastic diaphragm is provided in the buffer cavity, the elastic diaphragm separates the buffer cavity in the up-down direction to form a liquid cavity and a gas cavity, and the cylinder is provided with a plurality of connecting holes connecting the main cavity and the liquid cavity. The gas cavity can be filled with high-pressure gas, such as nitrogen. Since nitrogen is compressible relative to the hydraulic oil in the main cavity, and the elastic diaphragm itself has an elastic effect, when the input hydraulic oil generates pressure pulsation during operation, the pressure fluctuation can be effectively absorbed by compressing the gas cavity inside the gas cavity and the elastic force provided by the elastic diaphragm; when the pressure of the hydraulic oil is less than the pressure in the gas cavity, the gas expands to supplement the pressure difference, thereby reducing the influence of the pulsating pressure on the performance of the entire active suspension actuator.

[0008] According to some embodiments of the present invention, the upper joint includes an upper connecting tube and an upper buffer sleeve, one end of the upper connecting tube is connected to the outside of the cylinder, the upper connecting tube and the upper cavity are communicated with each other, the upper buffer sleeve is sleeved on the outside of the upper connecting tube, a first elastic buffer membrane extending around the upper connecting tube is provided inside the upper buffer sleeve, the first elastic buffer membrane separates the interior of the upper buffer sleeve in sequence along a direction away from the upper connecting tube to form a first inner cavity and a first outer cavity, and a first buffer hole connected to the first inner cavity is provided on the inner side of the upper connecting tube. When the external hydraulic energy supply device inputs hydraulic oil to the upper joint, the hydraulic oil flows into the upper cavity through the upper connecting pipe, and part of the hydraulic oil flows into the first inner cavity from the first buffer hole. When the pressure of the input hydraulic oil is normal, the pressure of the hydraulic oil in the first inner cavity on the first elastic buffer membrane remains stable. When pressure pulsation occurs, the oil pressure in the upper connecting pipe changes. At this time, the hydraulic oil can enter the first inner cavity from the first buffer hole. The elastic deformation of the first elastic buffer membrane can be used to buffer and absorb the pressure, thereby reducing the pressure fluctuation of the hydraulic oil input into the upper cavity, and further improving the accuracy and stability of the piston rod outputting the main force outward.

[0009] According to some embodiments of the present invention, the lower joint includes a lower connecting tube and a lower buffer sleeve, one end of the lower connecting tube is connected to the outside of the cylinder, the lower connecting tube and the lower cavity are communicated with each other, the lower buffer sleeve is sleeved on the outside of the lower connecting tube, a second elastic buffer membrane extending around the lower connecting tube is provided inside the lower buffer sleeve, the second elastic buffer membrane sequentially separates the interior of the lower buffer sleeve in a direction away from the lower connecting tube to form a second inner cavity and a second outer cavity, and a second buffer hole connected to the second inner cavity is provided on the inner side of the lower connecting tube. Similarly, when the external hydraulic energy supply device inputs hydraulic oil to the lower joint, the second elastic buffer membrane in the lower joint can be used to buffer and absorb the pressure, thereby reducing the pressure fluctuation of the hydraulic oil input into the lower cavity, and further improving the accuracy and stability of the piston rod outputting the main force outward.

[0010] According to some embodiments of the present invention, the upper through hole is located at the top of the main cavity, and the lower through hole is located at the bottom of the main cavity. At this time, the upper joint and the lower joint are respectively located in the middle of the cylinder barrel, and the hydraulic oil input from the upper joint first flows upward to the upper through hole, and then flows into the main cavity, and is pressurized from the top position of the main cavity, while the hydraulic oil input from the lower joint first flows downward to the lower through hole, and then flows into the main cavity, and is pressurized from the bottom position of the main cavity, so that the fluidity of the hydraulic oil in the main cavity and the upper and lower cavities can be improved, so that the pressure distribution is more uniform, thereby improving the stability of the force applied to the piston rod.

[0011] According to some embodiments of the present invention, the upper through hole extends obliquely downward in a direction away from the main cavity, and the lower through hole extends obliquely upward in a direction away from the main cavity. The inclined upper through hole and lower through hole can increase the flow velocity in the up-down direction, so that the fluidity of the hydraulic oil when entering and exiting the main cavity is stronger, thereby further improving the uniformity of pressure distribution.

[0012] According to some embodiments of the present invention, the upper vibration absorbing layer is connected to a side wall of the upper cavity close to the main cavity, and the upper vibration absorbing layer extends around the main cavity. The annular structure formed by the upper vibration absorbing layer and fixed to the inner position of the upper cavity can improve the stability of the upper vibration absorbing layer when subjected to force. When the hydraulic oil entering from the upper joint flows to the upper vibration absorbing layer, the hydraulic oil flows around the upper vibration absorbing layer and uses the upper vibration absorbing layer to absorb pressure fluctuations at the same time, which can further improve the buffering and absorption effect of the upper vibration absorbing layer on the hydraulic oil pressure.

[0013] According to some embodiments of the present invention, the lower vibration absorbing layer is connected to a side wall of the lower cavity close to the main cavity, and the lower vibration absorbing layer extends around the main cavity. Similarly, the annular structure formed by the lower vibration absorbing layer and fixed to the inner position of the lower cavity can improve the stability of the lower vibration absorbing layer when subjected to force. When the hydraulic oil entering from the lower joint flows to the lower vibration absorbing layer, the hydraulic oil flows around the lower vibration absorbing layer and uses the lower vibration absorbing layer to absorb pressure fluctuations at the same time, which can further improve the buffering and absorption effect of the lower vibration absorbing layer on the hydraulic oil pressure.

[0014] According to some embodiments of the present invention, the upper through hole and the lower through hole are respectively provided with a plurality of them, and the plurality of the upper through holes and the plurality of the lower through holes are respectively provided around the main cavity. After the hydraulic oil enters the upper cavity, it flows around the upper cavity and can enter the main cavity from the plurality of upper through holes. Similarly, after the hydraulic oil enters the lower cavity, it flows around the lower cavity and can enter the main cavity from the plurality of lower through holes, thereby evenly pressurizing the inside of the main cavity from multiple directions, further improving the stability of applying pressure to the piston rod.

[0015] According to some embodiments of the present invention, the upper vibration absorbing layer and the lower vibration absorbing layer are both mesh structures. The mesh upper vibration absorbing layer and the lower vibration absorbing layer can further improve their elastic deformation capacity and further enhance the effect of the upper vibration absorbing layer and the lower vibration absorbing layer on absorbing pressure fluctuations of the hydraulic oil.

[0016] According to some embodiments of the present invention, the upper vibration absorbing layer and the lower vibration absorbing layer are respectively made of polyurethane material. Polyurethane material has good elasticity and flexibility, can absorb and disperse impact energy, reduce vibration, and ensure the upper vibration absorbing layer and the lower vibration absorbing layer have a stable effect on the hydraulic oil.

[0017] An active suspension system according to a second aspect of an embodiment of the present invention includes: tank; The above-mentioned active suspension actuator, the upper joint and the lower joint are respectively connected to the oil tank through pipelines; A hydraulic pump is used to transport the oil in the oil tank to the upper joint or the lower joint.

[0018] This technical solution has at least the following beneficial effects: hydraulic oil is stored in the oil tank. When the active suspension actuator needs to provide a downward main force, the hydraulic pump draws hydraulic oil from the oil tank and inputs it to the lower joint for pressurization. Alternatively, when the active suspension actuator needs to provide an upward main force, the hydraulic pump draws hydraulic oil from the oil tank and inputs it to the upper joint for pressurization. During the pressurization of the upper joint or the lower joint, the upper vibration absorbing layer and the lower vibration absorbing layer absorb and buffer the flowing liquid, thereby effectively reducing the influence of pressure pulsation on the piston rod, making the main force output by the piston rod more precise and stable, thereby improving the performance of the active suspension system.

[0019] According to some embodiments of the present invention, the active suspension system further comprises an air pump, an air pipe is connected between the air pump and the gas cavity, and a regulating valve is arranged on the air pipe. During use, the gas cavity can be further pressurized by adjusting the air pump, or the pressure inside the gas cavity can be released by the regulating valve, so that the pressure in the gas cavity can be adjusted according to different usage needs, thereby changing the effect of the gas cavity on the main cavity to absorb pressure fluctuations in cooperation with each other, and improving the flexibility of use.

[0020] An active suspension adjustment method according to an embodiment of the third aspect of the present invention uses the above-mentioned active suspension system, including: controlling the hydraulic pump to transport the oil in the oil tank to the upper joint or the lower joint.

[0021] This technical solution has at least the following beneficial effects: when adjusting the active suspension, due to the use of the above-mentioned active suspension system, when adjusting the main force provided by the active suspension, the flowing liquid is absorbed and buffered by the upper vibration absorbing layer and the lower vibration absorbing layer, thereby effectively reducing the impact of pressure pulsation on the piston rod, making the main power output by the piston rod more precise and stable, thereby improving the performance of the active suspension and improving the driving comfort of the vehicle.

[0022] A vehicle according to an embodiment of the fourth aspect of the present invention comprises the above-mentioned active suspension system.

[0023] This technical solution has at least the following beneficial effects: in this vehicle, since the above-mentioned active suspension system is installed, when the active suspension system is needed to stabilize the vehicle, the active suspension system absorbs and buffers the flowing liquid through the upper vibration-absorbing layer and the lower vibration-absorbing layer, thereby effectively reducing the impact of pressure pulsation on the piston rod, making the main power output of the piston rod to the outside more precise and stable, thereby improving the active suspension performance and improving the driving comfort of the vehicle.

[0024] Additional aspects and advantages of the present invention will be described in part in the following description and will be apparent from the following description. This disclosure may be apparent or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly describes the drawings required for use in the description of the embodiments. Obviously, the drawings described are only part of the embodiments of the present invention, not all of the embodiments, and those skilled in the art can also obtain other design solutions and drawings based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the internal structure of the active suspension actuator of the present invention.

[0027] Figure 2 yes Figure 1 A is a partial enlarged schematic diagram.

[0028] Figure 3 It is a schematic diagram of the structure of the active suspension system of the present invention.

[0029] In the accompanying drawings: 100-cylinder, 110-main cavity, 111-upper through hole, 120-upper cavity, 121-upper vibration-absorbing layer, 130-lower cavity, 131-lower through hole, 132-lower vibration-absorbing layer, 140-buffer cavity, 141-elastic diaphragm, 142-connecting hole, 200-lower joint, 300-piston rod, 400-upper joint, 410-upper connecting pipe, 420-upper buffer sleeve, 430-first elastic buffer membrane, 440-first inner cavity, 450-first outer cavity, 460-first buffer hole, 500-oil tank, 600-regulating valve. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0031] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0032] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0033] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0034] Reference Figure 1 and Figure 2 , an active suspension actuator according to an embodiment of the first aspect of the present invention comprises a cylinder 100, an upper joint 400, a lower joint 200 and a piston rod 300, wherein: A main cavity 110, an upper cavity 120 and a lower cavity 130 are formed inside the cylinder 100. The upper cavity 120 and the lower cavity 130 are arranged at intervals in the up-down direction. An upper through hole 111 that is interconnected is arranged between the main cavity 110 and the upper cavity 120. An upper vibration absorbing layer 121 is arranged on the inner side wall of the upper cavity 120. A lower through hole 131 that is interconnected is arranged between the main cavity 110 and the lower cavity 130. A lower vibration absorbing layer 132 is arranged on the inner side wall of the lower cavity 130. The upper joint 400 is connected to the outside of the cylinder 100, the upper joint 400 and the upper cavity 120 are communicated with each other, and the upper joint 400 and the upper through hole 111 are staggered with each other in the up-down direction; The lower joint 200 is connected to the outer side of the cylinder 100, the lower joint 200 and the lower cavity 130 are communicated with each other, and the lower joint 200 and the lower through hole 131 are staggered with each other in the up-down direction; The piston rod 300 is located in the cylinder barrel 100 , and the top end of the piston rod 300 passes through the upper end of the cylinder barrel 100 .

[0035] As can be seen from the above, the cylinder 100 can be installed on the wheel, and the piston rod 300 extends out of the top of the cylinder 100 and is connected to the vehicle body, and the upper joint 400 and the lower joint 200 are connected to an external hydraulic energy supply device. When it is necessary to provide downward pressure to the piston rod 300, the hydraulic energy supply device inputs liquid into the upper cavity 120 through the upper joint 400, and the liquid entering the upper cavity 120 then enters the main cavity 110 from the upper through hole 111, pressurizing the top of the main cavity 110, thereby providing downward pressure to the piston rod 300, so that the piston rod 300 outputs a downward active force. In this process, when the liquid flows in the upper cavity 120, it passes through the upper vibration absorbing layer 121, and the upper vibration absorbing layer 121 absorbs the pressure fluctuation when the liquid flows through, which is beneficial to attenuate the pressure pulsation transmitted to the main cavity 110; similarly, when it is necessary to provide upward pressure to the piston rod 300 When pressure is applied, the hydraulic energy supply device inputs liquid into the lower cavity 130 through the lower joint 200. The liquid entering the lower cavity 130 then enters the main cavity 110 from the lower through hole 131, pressurizing the bottom of the main cavity 110, thereby providing upward pressure on the piston rod 300, so that the piston rod 300 outputs an upward active force. During this process, the liquid passes through the lower vibration absorbing layer 132 when flowing in the lower cavity 130. The lower vibration absorbing layer 132 absorbs the pressure fluctuations of the liquid when it flows through, which is beneficial to attenuating the pressure pulsation transmitted to the main cavity 110. In this way, the upper vibration absorbing layer 121 and the lower vibration absorbing layer 132 absorb and buffer the flowing liquid, thereby effectively reducing the influence of the pressure pulsation on the piston rod 300, making the active force output by the piston rod 300 more accurate and stable, thereby improving the active suspension performance.

[0036] In order to further improve the stability of the output main force, in this embodiment, a buffer cavity 140 is provided at the bottom of the cylinder 100, the main cavity 110 and the buffer cavity 140 are arranged at intervals in the vertical direction, and an elastic diaphragm 141 is provided in the buffer cavity 140. The elastic diaphragm 141 separates the buffer cavity 140 in the vertical direction to form a liquid cavity and a gas cavity, and the cylinder 100 is provided with a plurality of connecting holes 142 connecting the main cavity 110 and the liquid cavity. The gas cavity can be filled with high-pressure gas, such as nitrogen. Since nitrogen is compressible relative to the hydraulic oil in the main cavity 110, and the elastic diaphragm 141 itself has an elastic effect, when the input hydraulic oil generates pressure pulsation during operation, the pressure fluctuation can be effectively absorbed by compressing the gas cavity inside the gas cavity and the elastic force provided by the elastic diaphragm 141; when the pressure of the hydraulic oil is less than the pressure in the gas cavity, the gas expands to supplement the pressure difference, thereby reducing the influence of the pulsating pressure on the performance of the entire active suspension actuator.

[0037] In practical applications, the elastic diaphragm 141 is mainly used to provide elastic deformation and to separate the internal space of the buffer cavity 140 , and the elastic diaphragm 141 may be made of a variety of materials, such as rubber, elastic metal film, etc.

[0038] The upper joint 400 can be a straight pipe connected to the outside of the cylinder 100. In order to weaken the hydraulic pulsation before entering the cylinder 100, in this embodiment, the upper joint 400 includes an upper connecting pipe 410 and an upper buffer sleeve 420. One end of the upper connecting pipe 410 is connected to the outside of the cylinder 100. The upper connecting pipe 410 and the upper cavity 120 are communicated with each other. The upper buffer sleeve 420 is sleeved on the outside of the upper connecting pipe 410. The upper buffer sleeve 420 is provided with a first elastic buffer membrane 430 extending around the upper connecting pipe 410. The first elastic buffer membrane 430 is provided inside the upper buffer sleeve 420. The punching membrane 430 separates the interior of the upper buffer sleeve 420 in sequence along the direction away from the upper connecting tube 410 to form a first inner cavity 440 and a first outer cavity 450. The inner side of the upper connecting tube 410 is provided with a first buffer hole 460 connected to the first inner cavity 440. A plurality of first buffer holes 460 are arranged at intervals around the upper connecting tube 410. Similarly, the first elastic buffer membrane 430 is mainly used to provide elastic deformation and to separate the internal space of the upper buffer sleeve 420. It has a variety of materials, such as rubber, elastic metal film and other materials. When the external hydraulic energy supply device inputs hydraulic oil to the upper joint 400, the hydraulic oil flows into the upper cavity 120 through the upper connecting pipe 410, and part of the hydraulic oil flows into the first inner cavity 440 from the first buffer hole 460. When the pressure of the input hydraulic oil is normal, the hydraulic oil in the first inner cavity 440 maintains a stable pressure on the first elastic buffer membrane 430. When pressure pulsation occurs, the oil pressure in the upper connecting pipe 410 changes. At this time, the hydraulic oil can enter the first inner cavity 440 from the first buffer hole 460. The elastic deformation of the first elastic buffer membrane 430 can be used to buffer and absorb the pressure, thereby reducing the pressure fluctuation of the hydraulic oil input into the upper cavity 120, and further improving the accuracy and stability of the piston rod 300 outputting the main force to the outside.

[0039] For the lower joint 200, a structure for weakening and buffering the hydraulic pulsation can also be provided inside it. The structure of the lower joint 200 is the same as that of the upper joint 400. The lower joint 200 includes a lower connecting pipe and a lower buffer sleeve. One end of the lower connecting pipe is connected to the outside of the cylinder 100, and the lower connecting pipe is communicated with the lower cavity 130. The lower buffer sleeve is sleeved on the outside of the lower connecting pipe. A second elastic buffer membrane extending around the lower connecting pipe is provided inside the lower buffer sleeve. The second elastic buffer membrane sequentially separates the interior of the lower buffer sleeve in a direction away from the lower connecting pipe to form a second inner cavity and a second outer cavity. A second buffer hole connected to the second inner cavity is provided on the inner side of the lower connecting pipe. In actual applications, the upper joint 400 and the lower joint 200 can be the same accessories, which are fixed to the outside of the cylinder 100 by welding or threaded connection during production, or the upper joint 400, the lower joint 200 and the cylinder 100 are an integrally formed structure. Similarly, when the external hydraulic energy supply device inputs hydraulic oil to the lower joint 200, the second elastic buffer membrane in the lower joint 200 can buffer and absorb the pressure, thereby reducing the pressure fluctuation of the hydraulic oil input into the lower cavity 130, and further improving the accuracy and stability of the piston rod 300 outputting the main force to the outside.

[0040] In the above embodiment, the upper through hole 111 and the lower through hole 131 can be respectively arranged in the middle position of the main cavity 110. At this time, the hydraulic oil entering from the upper through hole 111 and the lower through hole 131 directly acts on the piston rod 300. In order to further improve the overall performance, in this embodiment, the upper through hole 111 is located at the top of the main cavity 110, and the lower through hole 131 is located at the bottom of the main cavity 110. At this time, the upper joint 400 and the lower joint 200 are respectively located in the middle position of the cylinder 100, and the hydraulic oil input from the upper joint 400 first flows upward to the upper through hole 111, and then flows into the main cavity 110, and is pressurized from the top position of the main cavity 110, while the hydraulic oil input from the lower joint 200 first flows downward to the lower through hole 131, and then flows into the main cavity 110, and is pressurized from the bottom position of the main cavity 110. In this way, the fluidity of the hydraulic oil in the main cavity 110 and the upper cavity 120 and the lower cavity 130 can be improved, so that the pressure distribution is more uniform, thereby improving the stability of the force applied to the piston rod 300.

[0041] Furthermore, the upper through hole 111 extends obliquely downward in a direction away from the main cavity 110, and the lower through hole 131 extends obliquely upward in a direction away from the main cavity 110. The inclined upper through hole 111 and the lower through hole 131 can increase the flow velocity in the up-down direction, so that the fluidity of the hydraulic oil when entering and exiting the main cavity 110 is stronger, thereby further improving the uniformity of the pressure distribution.

[0042] The upper vibration absorbing layer 121 is installed on the flow path from the upper joint 400 to the upper through hole 111 in the upper cavity 120. When the hydraulic oil passes through the upper vibration absorbing layer 121, the upper vibration absorbing layer 121 can be used to absorb the pressure fluctuation. Therefore, the installation position of the upper vibration absorbing layer 121 in the upper cavity 120 is not unique. In order to improve the effect of the upper vibration absorbing layer 121, in the present embodiment, the upper vibration absorbing layer 121 is connected to a side wall of the upper cavity 120 close to the main cavity 110, and the upper vibration absorbing layer 121 extends around the main cavity 110. The annular structure formed by the upper vibration-absorbing layer 121 is fixed to the inner side of the upper cavity 120, which can improve the stability of the upper vibration-absorbing layer 121 when subjected to force. When the hydraulic oil entering from the upper joint 400 flows to the upper vibration-absorbing layer 121, the hydraulic oil flows around the upper vibration-absorbing layer 121 and the upper vibration-absorbing layer 121 absorbs pressure fluctuations at the same time, thereby further improving the buffering and absorption effect of the upper vibration-absorbing layer 121 on the hydraulic oil pressure.

[0043] Similarly, the lower vibration absorbing layer 132 is connected to a side wall of the lower cavity 130 close to the main cavity 110, and the lower vibration absorbing layer 132 extends around the main cavity 110. Similarly, the annular structure formed by the lower vibration absorbing layer 132 and fixed to the inner position of the lower cavity 130 can improve the stability of the lower vibration absorbing layer 132 when subjected to force. When the hydraulic oil entering from the lower joint 200 flows to the lower vibration absorbing layer 132, the hydraulic oil flows around the lower vibration absorbing layer 132, and the lower vibration absorbing layer 132 is used to absorb pressure fluctuations at the same time, so that the buffering and absorption effect of the lower vibration absorbing layer 132 on the hydraulic oil pressure can be further improved.

[0044] The upper through hole 111 and the lower through hole 131 are mainly used to connect the upper cavity 120 and the lower cavity 130 with the interior of the main cavity 110. The number of the upper through hole 111 and the number of the lower through hole 131 can be only one, and in order to improve the efficiency of the hydraulic oil entering and exiting the main cavity 110, in this embodiment, the upper through hole 111 and the lower through hole 131 are respectively provided in plurality, and the plurality of upper through holes 111 and the plurality of lower through holes 131 are respectively provided around the main cavity 110. After the hydraulic oil enters the upper cavity 120, it flows around the upper cavity 120 and can enter the main cavity 110 from the plurality of upper through holes 111. Similarly, after the hydraulic oil enters the lower cavity 130, it flows around the lower cavity 130 and can enter the main cavity 110 from the plurality of lower through holes 131, thereby evenly pressurizing the interior of the main cavity 110 from multiple directions, further improving the stability of applying pressure to the piston rod 300.

[0045] The upper vibration absorbing layer 121 and the lower vibration absorbing layer 132 can be fixed to the inner side of the upper cavity 120 and the inner side of the lower cavity 130 respectively by pasting. In this embodiment, the upper vibration absorbing layer 121 and the lower vibration absorbing layer 132 are both mesh structures. The mesh upper vibration absorbing layer 121 and the lower vibration absorbing layer 132 can further improve the elastic deformation capacity of the two, and further enhance the effect of the upper vibration absorbing layer 121 and the lower vibration absorbing layer 132 on absorbing pressure fluctuations of the hydraulic oil.

[0046] Furthermore, the upper vibration absorbing layer 121 and the lower vibration absorbing layer 132 are respectively made of polyurethane material. The polyurethane material has good elasticity and flexibility, can absorb and disperse impact energy, reduce vibration, and ensure the upper vibration absorbing layer 121 and the lower vibration absorbing layer 132 have a stable effect on the hydraulic oil.

[0047] like Figure 3 As shown, an active suspension system according to an embodiment of the second aspect of the present invention includes: Fuel tank 500; The above-mentioned active suspension actuator has pipelines connected between the upper joint 400 and the lower joint 200 and the oil tank 500 respectively; The hydraulic pump is used to transport the oil in the oil tank 500 to the upper connector 400 or the lower connector 200 .

[0048] This technical solution has at least the following beneficial effects: hydraulic oil is stored in the oil tank 500. When the active suspension actuator needs to provide a downward main force, the hydraulic pump draws hydraulic oil from the oil tank 500 and inputs it to the lower joint 200 for pressurization. Alternatively, when the active suspension actuator needs to provide an upward main force, the hydraulic pump draws hydraulic oil from the oil tank 500 and inputs it to the upper joint 400 for pressurization. During the pressurization of the upper joint 400 or the lower joint 200, the upper vibration absorbing layer 121 and the lower vibration absorbing layer 132 absorb and buffer the flowing liquid, thereby effectively reducing the influence of pressure pulsation on the piston rod 300, so that the main force output by the piston rod 300 to the outside is more accurate and stable, thereby improving the performance of the active suspension system.

[0049] According to some embodiments of the present invention, the active suspension system further includes an air pump, and an air pipe is connected between the air pump and the gas cavity, and the air pipe is provided with a regulating valve 600. During use, the gas cavity can be further pressurized by adjusting the air pump, or the pressure inside the gas cavity can be released by adjusting the valve 600, so that the pressure in the gas cavity can be adjusted according to different usage needs, thereby changing the effect of the gas cavity on the main cavity 110 to cooperate with each other to absorb pressure fluctuations, thereby improving the flexibility of use.

[0050] According to an active suspension adjustment method of an embodiment of the third aspect of the present invention, the above-mentioned active suspension system is applied, including: controlling the hydraulic pump to transport the oil in the oil tank 500 to the upper joint 400 or the lower joint 200, when it is necessary to control the piston rod 300 to move upward, controlling the hydraulic pump to transport the oil in the oil tank 500 to the lower joint 200; when it is necessary to control the piston rod 300 to move downward, controlling the hydraulic pump to transport the oil in the oil tank 500 to the upper joint 400.

[0051] This technical solution has at least the following beneficial effects: when adjusting the active suspension, due to the use of the above-mentioned active suspension system, when adjusting the main force provided by the active suspension, the upper vibration absorbing layer 121 and the lower vibration absorbing layer 132 are used to absorb and buffer the flowing liquid, thereby effectively reducing the influence of pressure pulsation on the piston rod 300, making the main power output outward by the piston rod 300 more precise and stable, thereby improving the performance of the active suspension and improving the driving comfort of the vehicle.

[0052] When using this active suspension system for adjustment, since it has the function of attenuating and absorbing hydraulic pulsation, when adjusting the active suspension system, the active suspension system's compensation for hydraulic pulsation can be taken into account, and the pressure adjustment of the gas cavity can be combined to adjust the frequency of the main power adjustment, thereby further improving the sensitivity and comfort of the active suspension system during adjustment.

[0053] An embodiment of the present invention further provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to execute the above-mentioned active suspension adjustment method.

[0054] It is worth noting that since the computer-readable storage medium of an embodiment of the present invention can execute the active suspension adjustment method of any of the above-mentioned embodiments, the specific implementation manner and technical effects of the computer-readable storage medium of an embodiment of the present invention can refer to the specific implementation manner and technical effects of the active suspension adjustment method of any of the above-mentioned embodiments.

[0055] In addition, an embodiment of the present invention also provides a computer program product, including a computer program or computer instructions, the computer program or computer instructions are stored in a computer-readable storage medium, the processor of a computer device reads the computer program or computer instructions from the computer-readable storage medium, and the processor executes the computer program or computer instructions, so that the computer device executes the above-mentioned active suspension adjustment method.

[0056] It is worth noting that since the computer program product of the embodiment of the present invention can execute the active suspension adjustment method of any of the above-mentioned embodiments, the specific implementation manner and technical effects of the computer program product of the embodiment of the present invention can refer to the specific implementation manner and technical effects of the active suspension adjustment method of any of the above-mentioned embodiments.

[0057] It will be appreciated by those skilled in the art that all or some of the steps and systems in the methods disclosed above may be implemented as software, firmware, hardware, and appropriate combinations thereof. Some or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium and a communication medium. As known to those skilled in the art, the term computer storage medium includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storing information. Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disk or other optical disk storage, magnetic cassette, magnetic tape, disk storage or other magnetic storage device, or any other medium that may be used to store desired information and may be accessed by a computer. In addition, it is known to those skilled in the art that communication media typically include computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0058] An embodiment of the present invention further provides a vehicle control device, comprising a memory, a processor, and a program stored in the memory and executable on the processor, wherein the program implements the active suspension adjustment method of the above embodiment when executed by the processor.

[0059] Take the example that the processor and memory in the vehicle control device can be connected through a bus. The memory, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk memory, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory may optionally include a memory remotely arranged relative to the control processor, and these remote memories may be connected to the control device via a network.

[0060] A vehicle according to an embodiment of the fourth aspect of the present invention includes the above-mentioned active suspension system. The vehicle can be a private car, such as a sedan, SUV, MPV or pickup truck. The vehicle can also be an operating vehicle, such as a van, bus, small truck or large trailer. The vehicle needs to have an electric motor that can output power or store mechanical energy as a generator. When the vehicle is a new energy vehicle, it can be a hybrid vehicle or a pure electric vehicle.

[0061] This technical solution has at least the following beneficial effects: in this vehicle, since the above-mentioned active suspension system is installed, when the active suspension system is needed to stabilize the vehicle, the active suspension system absorbs and buffers the flowing liquid through the upper vibration-absorbing layer 121 and the lower vibration-absorbing layer 132, thereby effectively reducing the impact of pressure pulsation on the piston rod 300, making the main power output outward by the piston rod 300 more precise and stable, thereby improving the active suspension performance and improving the driving comfort of the vehicle.

[0062] The preferred embodiments of the present invention are specifically described above, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An active suspension actuator, characterized in that: include: A cylinder (100) is formed with a main cavity (110), an upper cavity (120) and a lower cavity (130) therein; the upper cavity (120) and the lower cavity (130) are arranged at intervals in the up-down direction; an upper through hole (111) communicating with each other is arranged between the main cavity (110) and the upper cavity (120); an upper vibration absorbing layer (121) is arranged on the inner side wall of the upper cavity (120); a lower through hole (131) communicating with each other is arranged between the main cavity (110) and the lower cavity (130); and a lower vibration absorbing layer (132) is arranged on the inner side wall of the lower cavity (130); An upper joint (400) connected to the outside of the cylinder (100), the upper joint (400) and the upper cavity (120) being in communication with each other, and the upper joint (400) and the upper through hole (111) being staggered in the up-down direction; A lower joint (200) connected to the outside of the cylinder (100), the lower joint (200) and the lower cavity (130) being in communication with each other, and the lower joint (200) and the lower through hole (131) being staggered in the up-down direction; The piston rod (300) is located in the cylinder barrel (100), and the top end of the piston rod (300) passes through the upper end of the cylinder barrel (100).

2. The active suspension actuator according to claim 1, characterized in that: A buffer cavity (140) is arranged at the bottom of the cylinder (100); the main cavity (110) and the buffer cavity (140) are arranged at intervals in the vertical direction; an elastic diaphragm (141) is arranged in the buffer cavity (140); the elastic diaphragm (141) separates the buffer cavity (140) in the vertical direction into a liquid cavity and a gas cavity; and the cylinder (100) is provided with a plurality of connecting holes (142) connecting the main cavity (110) and the liquid cavity.

3. The active suspension actuator according to claim 2, characterized in that: The upper joint (400) comprises an upper connecting pipe (410) and an upper buffer sleeve (420); one end of the upper connecting pipe (410) is connected to the outside of the cylinder (100); the upper connecting pipe (410) and the upper cavity (120) are communicated with each other; the upper buffer sleeve (420) is sleeved on the outside of the upper connecting pipe (410); a first elastic buffer membrane (430) extending around the upper connecting pipe (410) is provided inside the upper buffer sleeve (420); the first elastic buffer membrane (430) sequentially separates the interior of the upper buffer sleeve (420) in a direction away from the upper connecting pipe (410) to form a first inner cavity (440) and a first outer cavity (450); and a first buffer hole (460) communicating with the first inner cavity (440) is provided inside the upper connecting pipe (410).

4. The active suspension actuator according to claim 3, characterized in that: The lower joint (200) comprises a lower connecting pipe and a lower buffer sleeve, one end of the lower connecting pipe is connected to the outside of the cylinder (100), the lower connecting pipe and the lower cavity (130) are communicated with each other, the lower buffer sleeve is sleeved on the outside of the lower connecting pipe, a second elastic buffer membrane extending around the lower connecting pipe is provided inside the lower buffer sleeve, the second elastic buffer membrane sequentially separates the interior of the lower buffer sleeve in a direction away from the lower connecting pipe to form a second inner cavity and a second outer cavity, and a second buffer hole communicating with the second inner cavity is provided inside the lower connecting pipe.

5. The active suspension actuator according to claim 2, characterized in that: The upper through hole (111) is located at the top of the main cavity (110), and the lower through hole (131) is located at the bottom of the main cavity (110).

6. The active suspension actuator according to claim 5, characterized in that: The upper through hole (111) extends obliquely downward in a direction away from the main cavity (110), and the lower through hole (131) extends obliquely upward in a direction away from the main cavity (110).

7. The active suspension actuator according to claim 2, characterized in that: The upper vibration absorbing layer (121) is connected to a side wall of the upper cavity (120) close to the main cavity (110), and the upper vibration absorbing layer (121) extends around the main cavity (110).

8. The active suspension actuator according to claim 2, characterized in that: The lower vibration absorbing layer (132) is connected to a side wall of the lower cavity (130) close to the main cavity (110), and the lower vibration absorbing layer (132) extends around the main cavity (110).

9. The active suspension actuator according to claim 2, characterized in that: A plurality of the upper through holes (111) and a plurality of the lower through holes (131) are respectively provided, and the plurality of the upper through holes (111) and the plurality of the lower through holes (131) are respectively provided around the main cavity (110).

10. The active suspension actuator according to claim 2, characterized in that: The upper vibration absorbing layer (121) and the lower vibration absorbing layer (132) are both mesh structures.

11. The active suspension actuator according to claim 2, characterized in that: The upper vibration absorbing layer (121) and the lower vibration absorbing layer (132) are respectively made of polyurethane material.

12. An active suspension system, characterized in that: include: Fuel tank (500); The active suspension actuator according to any one of claims 2 to 11, wherein pipelines are connected between the upper joint (400) and the lower joint (200) and the oil tank (500) respectively; A hydraulic pump is used to transport the oil in the oil tank (500) to the upper joint (400) or the lower joint (200).

13. The active suspension system according to claim 12, characterized in that: It also includes an air pump, wherein an air pipe is connected between the air pump and the gas cavity, and a regulating valve (600) is provided on the air pipe.

14. An active suspension adjustment method, characterized in that: Application of the active suspension system as claimed in claim 12 comprises: controlling the hydraulic pump to transport the oil in the oil tank (500) to the upper joint (400) or the lower joint (200).

15. A vehicle, characterized in that: Comprising the active suspension system as claimed in claim 13.

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