Vehicle suspension spring and vehicle suspension system thereof

Abstract

The utility model relates to a vehicle suspension spring and a vehicle suspension system thereof, and the vehicle suspension spring comprises a hydraulic cylinder, an expansion liquid container and a liquid conduit, the hydraulic cylinder comprises a piston, a displacement sensor, a cylinder body connecting shaft and a piston rod connecting shaft; the hydraulic cylinder body connecting shaft is arranged at one end of the hydraulic cylinder, the piston rod connecting shaft is arranged at the end of the piston rod, the hydraulic cylinder body connecting shaft and the piston rod connecting shaft are located at the two ends of the hydraulic cylinder respectively, the cylinder body connecting shaft is connected with the wheel axle, and the piston rod connecting shaft is connected with the vehicle body. The displacement sensor is arranged in the hydraulic cylinder to measure the position of the piston; a connector is arranged between a liquid cavity and a gas cavity of the expanded liquid container, the connector between the liquid cavity and the gas cavity is sealed and isolated by an air bag, an inflation valve and a deflation valve are further arranged on the gas cavity, and the inflation valve and the deflation valve are used for inflating and deflating the gas cavity. The liquid cavity communicates with an inner cavity of the hydraulic cylinder through a liquid guide pipe.

Description

Technical Field

[0001] The utility model relates to a vehicle suspension technology of a vehicle, in particular to a vehicle suspension spring and a vehicle suspension system thereof. Background Art

[0002] All vehicles are inseparable from the suspension system. The existing suspension system is generally composed of a spring unit and a damping unit. Real-time control of the damping according to the road conditions and adjustment of part or all of the vehicle height can improve the comfort, stability and safety of the vehicle. Among them, obtaining the vehicle height information at any time is a necessary link in the perception and control system of the entire system. Most of the existing technologies use a height sensor installed on the vehicle to measure the vehicle height, and then electronically control the spring unit and the damping unit. However, the existing technology has the problems of high cost, complex system, and high error probability. At the same time, the existing suspension system is generally a liquid-controlled suspension, which has the problems of heavy weight and complex structure. Utility Model Content

[0003] The utility model aims to provide a vehicle suspension spring and a vehicle suspension system thereof to solve the above-mentioned problems of the prior art.

[0004] The utility model discloses a vehicle suspension spring, which comprises: a hydraulic cylinder, an extended liquid container and a liquid conduit; the hydraulic cylinder comprises a piston, a displacement sensor, a cylinder body connecting shaft and a piston rod connecting shaft; the hydraulic cylinder body connecting shaft is arranged at one end of the hydraulic cylinder, the piston rod connecting shaft is arranged at the end of the piston rod, the hydraulic cylinder body connecting shaft and the piston rod connecting shaft are respectively located at two ends of the hydraulic cylinder, the cylinder body connecting shaft is connected to the wheel shaft, and the piston rod connecting shaft is connected to the vehicle body; the displacement sensor is arranged in the hydraulic cylinder to measure the position of the piston; the extended liquid container comprises: an air bag, a liquid cavity and a gas cavity; an interface is provided between the liquid cavity and the gas cavity, the air bag seals and isolates the interface between the liquid cavity and the gas cavity, an inflation valve and an air release valve are also provided on the gas cavity, the inflation valve and the air release valve are used to inflate and deflate the gas cavity; the liquid cavity is communicated with the inner cavity of the hydraulic cylinder through the liquid conduit.

[0005] According to one embodiment of the vehicle suspension spring of the utility model, the inflation port of the airbag is sealed and connected to the open end of the gas cavity, and after inflation, the main body of the airbag is located inside the liquid cavity; or the liquid filling port of the airbag is sealed and connected to the open end of the liquid cavity, and after inflation, the main body of the airbag is located inside the gas cavity.

[0006] According to an embodiment of the vehicle suspension spring of the utility model, one end of the liquid conduit is communicated with the upper liquid chamber of the hydraulic cylinder, and the other end is communicated with the expansion liquid container through the damping control valve.

[0007] According to an embodiment of the vehicle suspension spring of the utility model, the inner cavity of the hydraulic cylinder is communicated with the expansion liquid container through a liquid conduit and a damping electric control valve.

[0008] According to an embodiment of the vehicle suspension spring of the utility model, the displacement sensor is an inductive linear displacement sensor.

[0009] According to an embodiment of the vehicle suspension spring of the utility model, liquid guide grooves are provided at both ends of the pressure-resistant medium space inside the expansion liquid container for guiding the solution at both ends of the expansion liquid container.

[0010] According to an embodiment of the vehicle suspension spring of the utility model, it also includes: a control unit connected to a displacement sensor, a CAN bus, an inflation valve and a deflation valve respectively; the control unit is equipped with a three-axis acceleration sensor and an angular velocity sensor, and is installed near the vehicle body part to which the upper connection point of the vehicle suspension spring is connected.

[0011] The utility model also relates to a vehicle suspension system, wherein the wheels of the vehicle are installed corresponding to the vehicle suspension springs; an energy storage unit is installed on the vehicle suspension system; the energy storage unit is connected to the inflation valve of each vehicle suspension spring through a high-pressure pipeline, and is connected to the deflation valve of each vehicle suspension spring through a low-pressure pipeline, so as to pressurize or depressurize the airbag of the vehicle suspension spring.

[0012] According to an embodiment of the vehicle suspension system of the utility model, two front wheels of the vehicle are respectively equipped with a corresponding vehicle suspension spring; multiple rear wheels on one side of the vehicle are respectively equipped with a hydraulic cylinder, and multiple rear wheels on the other side of the vehicle are respectively equipped with a hydraulic cylinder; the corresponding hydraulic cylinders of the multiple rear wheels on the same side are interconnected and share the same expansion liquid container.

[0013] According to one embodiment of the vehicle suspension system of the utility model, the energy storage unit includes: a high-pressure gas tank, a pressure sensor, a pressure maintaining valve, a steam pump, a low-pressure gas tank and an energy storage unit controller; wherein the high-pressure pipeline of the high-pressure gas tank is connected to the inflation valve of each vehicle suspension spring, and the low-pressure pipeline of the low-pressure gas tank is connected to the deflation valve of each vehicle suspension spring; wherein the deflation valve also has an interface connected to the external atmosphere.

[0014] In summary, the vehicle suspension spring and suspension system of the utility model achieve the purpose of control by only adjusting the charging and discharging of gas to change the damping of the suspension system. On the one hand, it is more environmentally friendly, and on the other hand, it reduces the overall weight of the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of a vehicle suspension spring of the utility model;

[0016] Figure 2This is a schematic diagram of another embodiment of a vehicle suspension spring of the utility model;

[0017] Figure 3 This is a schematic diagram of the vehicle suspension system of the utility model;

[0018] Figure 4 Another schematic diagram of the suspension system of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, content, and advantages of the utility model clearer, the specific implementation methods of the utility model are further described in detail below in conjunction with the drawings and embodiments.

[0020] Figure 1 This is a schematic diagram of a vehicle suspension spring of the utility model, such as Figure 1 As shown, the vehicle suspension spring of the utility model comprises: a hydraulic cylinder 3, an expansion liquid container 17 and a liquid conduit 19.

[0021] like Figure 1 As shown, the hydraulic cylinder 3 includes a piston 2, a displacement sensor 4, a cylinder body connecting shaft 5 and a piston rod connecting shaft 6.

[0022] The piston 2 includes: one end of the piston rod is connected to the piston head, and the piston rod connecting shaft 6 is arranged at the other end of the piston rod. The hydraulic cylinder body connecting shaft 5 is arranged at one end of the hydraulic cylinder 3, and the hydraulic cylinder body connecting shaft 5 and the piston rod connecting shaft 6 are respectively located at both ends of the hydraulic cylinder 3. The cylinder body connecting shaft 5 is connected to the wheel shaft, the piston rod connecting shaft 6 is connected to the vehicle body, and the displacement sensor 4 and the hydraulic cylinder body connecting shaft 5 are arranged at the same end of the hydraulic cylinder 3 to measure the position of the piston 2 and obtain the vehicle body height.

[0023] like Figure 1 As shown, the expansion liquid container 17 includes: an airbag 18, a liquid cavity 26 and a gas cavity 10. The inflation port of the airbag 18 is sealed and connected to the open end of the gas cavity 10, and the main body of the airbag 18 is located inside the liquid cavity 26. The gas cavity 10 is also provided with an inflation valve 14 and an deflation valve 15, which are used to inflate and deflate gas into the gas cavity 10. The liquid cavity 26 is connected to the inner cavity of the hydraulic cylinder 3 through a liquid conduit 15.

[0024] like Figure 1 As shown, one end of the liquid conduit 19 is connected to the upper part of the hydraulic cylinder 3, and the other end is connected to the expansion liquid container 17 through the damping control valve (such as CDC) 16.

[0025] like Figure 1 As shown, the control unit 7 is respectively connected to the displacement sensor 4, the CAN bus 13, the inflation valve 14 and the deflation valve 15.

[0026] like Figure 1 As shown, the airbag 18 can be inflated through the gas chamber 10 to form an internal gas space 27. The expansion liquid container 17 has a pressure-resistant medium space 26 inside the container.

[0027] like Figure 1 As shown, the inner cavity of the hydraulic cylinder 3 is connected to the extended liquid container 17 through the liquid conduit 15 and the damping electric control valve 16. The liquid conduit 15 is connected to the pressure-resistant medium space 26 inside the extended liquid container 17 through the damping electric control valve 16. The damping electric control valve 16 is used to adjust the damping of the piston 2 by controlling the flow of liquid between the hydraulic cylinder 3 and the extended liquid container 17, in cooperation with the airbag 18, so as to control the rigidity of the vehicle.

[0028] like Figure 1 As shown, in the hydraulic cylinder 3, the displacement sensor 4 extends into the piston rod of the piston 2 to sense the movement of the piston rod. Specifically, the displacement sensor 4 is an inductive linear displacement sensor (LVIT).

[0029] like Figure 1 As shown, the internal space of the hydraulic cylinder 3 is filled with a pressure-resistant medium, which is generally a liquid.

[0030] like Figure 1 As shown, for a preferred embodiment, when liquid is placed in the pressure-resistant medium space 26, liquid guide grooves are provided at both ends of the pressure-resistant medium space 26 inside the container of the extended liquid container 17. The liquid guide grooves are used to guide the solution at both ends of the extended liquid container 17 to prevent the airbag 18 from blocking the flow of liquid at both ends of the extended liquid container 17 after expansion. Specifically, there may be one or more liquid guide grooves, so that after the airbag 18 expands, the liquid can still flow flexibly in the pressure-resistant medium space 26.

[0031] like Figure 1 As shown, since the hydraulic cylinder and the piston are connected to the vehicle body and the axle through the hydraulic cylinder body connecting shaft 5 and the piston rod connecting shaft 6, it is equivalent to detecting the instantaneous change of the vehicle body height. Specifically, the ends 5 and 6 of the hydraulic cylinder and the piston can be connected to the vehicle body and the axle through levers.

[0032] like Figure 1 As shown, the bottom of the hydraulic cylinder 3 and the outer side of the piston rod 4 can be covered with a dust cover.

[0033] like Figure 1 As shown, the gas in the airbag 18 can use air, or can use inert gas nitrogen or argon. These gases are in a pressurized state under normal use.

[0034] like Figure 1As shown, the liquid conduit 15 can be connected using a hose or a hard pipe.

[0035] Figure 2 This is a schematic diagram of another embodiment of a vehicle suspension spring of the utility model. For this embodiment, the hydraulic cylinder 3 and the liquid conduit 19 are connected Figure 1 The embodiment is consistent, wherein the expansion liquid container 17 includes: an airbag 18, a liquid cavity 26 and a gas cavity 10. The open end of the airbag 18 is sealed and connected to the open end of the liquid cavity 26, and the main body of the airbag 18 is located inside the gas cavity 10. The gas cavity 10 is also provided with an inflation valve 14 and an deflation valve 15, and the inflation valve 14 and the deflation valve 15 are used to inflate and deflate gas into the gas cavity 10. The liquid cavity 26 is connected to the inner cavity of the hydraulic cylinder 3 through the liquid conduit 15. The airbag 18 of this embodiment is flushed with liquid through the liquid cavity 26.

[0036] Figure 3 The schematic diagram of the suspension system of the utility model is as follows: Figure 3 As shown, each wheel of the vehicle is correspondingly installed with a vehicle suspension spring 100. The gas-liquid suspension system includes four vehicle suspension springs 100. The energy storage unit 21 is installed on the vehicle suspension system. The energy storage unit 21 is respectively connected to the inflation valve 14 and the deflation valve 15 of each vehicle suspension spring 100 through a high-pressure pipeline and a low-pressure pipeline, and pressurizes or depressurizes the airbag 18 of the vehicle suspension spring 100, so as to realize the lifting and lowering of 1 / 4 of the vehicle body.

[0037] like Figure 3 As shown, the energy storage unit 21 includes: a high-pressure gas tank 25, a pressure sensor 24, a pressure-maintaining valve 23, a steam pump 26, a low-pressure gas tank 22, and an energy storage unit controller 27. The high-pressure gas tank 25 is connected to the inflation valve 14 of each vehicle suspension spring 100, and the low-pressure gas tank 22 is connected to the deflation valve 15 of each vehicle suspension spring 100. The high-pressure gas tank 25 is connected to the high-pressure pipeline, and the low-pressure gas tank 22 is connected to the low-pressure pipeline.

[0038] The energy storage unit controller 27 is connected to the central controller of the vehicle via a CAN bus.

[0039] like Figure 1 as well as Figure 3 As shown, the vent valve 15 can also be directly connected to the atmosphere as required.

[0040] like Figure 1 as well as Figure 3 As shown, the control unit 7 can be equipped with a three-axis acceleration sensor and an angular velocity sensor, which can be installed in close proximity to the vehicle body portion to which the upper connection point of the vehicle suspension spring is connected, so as to achieve a more accurate measurement of the dynamics of this 1 / 4 of the vehicle body, thereby realizing a more effective hydraulic cylinder spring shock absorption control algorithm.

[0041] Figure 4 Another schematic diagram of the suspension system of the utility model is shown in FIG. Figure 4 As shown, for one embodiment, two front wheels of the vehicle are respectively installed with a vehicle suspension spring 100. One rear wheel on one side of the vehicle is installed with a vehicle suspension spring 101, and the other rear wheel on the vehicle is installed with a vehicle suspension spring 102. The hydraulic cylinders 3 of multiple vehicle suspension springs 101 are connected and can be interconnected. Multiple vehicle suspension springs 101 share the same expansion liquid container 17. The hydraulic cylinders 3 of multiple vehicle suspension springs 102 are connected and can be interconnected. Multiple vehicle suspension springs 102 share the same expansion liquid container 17. Since multiple vehicle suspension springs 102 share the same expansion liquid container 17 and the airbag 18 therein, multiple vehicle suspension springs 101 share the same expansion liquid container 17 and the airbag 18 therein, it can more effectively offset the impact of road fluctuations for large trailers and evenly share the pressure on the rear wheels.

[0042] In summary, the vehicle suspension spring and suspension system of the utility model achieve the purpose of control by only adjusting the charging and discharging of gas to change the damping of the suspension system. On the one hand, it is more environmentally friendly, and on the other hand, it reduces the overall weight of the vehicle.

[0043] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A vehicle suspension spring, characterized in that: include: hydraulic cylinder, expansion fluid container, and fluid conduit; The hydraulic cylinder includes a piston, a displacement sensor, a cylinder body connecting shaft and a piston rod connecting shaft; the hydraulic cylinder body connecting shaft is arranged at one end of the hydraulic cylinder, the piston rod connecting shaft is arranged at the end of the piston rod, the hydraulic cylinder body connecting shaft and the piston rod connecting shaft are respectively located at two ends of the hydraulic cylinder, the cylinder body connecting shaft is connected to the wheel shaft, and the piston rod connecting shaft is connected to the vehicle body; the displacement sensor is arranged in the hydraulic cylinder to measure the position of the piston; The extended liquid container comprises: an air bag, a liquid cavity and a gas cavity; an interface is provided between the liquid cavity and the gas cavity, the air bag seals and isolates the interface between the liquid cavity and the gas cavity, and an inflation valve and an air release valve are provided on the gas cavity, the inflation valve and the air release valve are used to inflate and release gas into the gas cavity; The liquid chamber is communicated with the inner cavity of the hydraulic cylinder through a liquid conduit.

2. The vehicle suspension spring according to claim 1, characterized in that The inflation port of the airbag is sealedly connected to the open end of the gas cavity, and after inflation, the main body of the airbag is located inside the liquid cavity; or The liquid filling port of the airbag is sealed and connected to the open end of the liquid cavity. After the liquid is filled, the main body of the airbag is located inside the gas cavity.

3. The vehicle suspension spring according to claim 1, characterized in that One end of the liquid conduit is communicated with the upper liquid chamber of the hydraulic cylinder, and the other end is communicated with the expansion liquid container through a damping control valve.

4. The vehicle suspension spring according to claim 1, characterized in that The inner cavity of the hydraulic cylinder is communicated with the expansion liquid container through a liquid conduit and a damping electric control valve.

5. The vehicle suspension spring according to claim 1, characterized in that The displacement sensor is an inductive linear displacement sensor.

6. The vehicle suspension spring according to claim 1, characterized in that Liquid guide grooves are arranged at both ends of the pressure-resistant medium space inside the extended liquid container, for guiding the solution at both ends of the extended liquid container.

7. The vehicle suspension spring according to claim 1, characterized in that Also includes: The control unit is respectively connected to the displacement sensor, the CAN bus, the inflation valve and the deflation valve; The control unit is equipped with a triaxial acceleration sensor and an angular velocity sensor and is mounted near the part of the vehicle body to which the upper connection point of the vehicle suspension spring is attached.

8. A vehicle suspension system, characterized in that: It includes the vehicle suspension spring described in any one of claims 1 to 7, and the wheels are installed corresponding to the vehicle suspension springs; the energy storage unit is installed on the vehicle suspension system; the energy storage unit is connected to the inflation valve of each vehicle suspension spring through a high-pressure pipeline, and is connected to the deflation valve of each vehicle suspension spring through a low-pressure pipeline, so as to pressurize or depressurize the airbag of the vehicle suspension spring.

9. The vehicle suspension system according to claim 8, characterized in that A vehicle suspension spring is installed correspondingly to each of the two front wheels of the vehicle; a hydraulic cylinder is installed respectively on multiple rear wheels on one side of the vehicle, and a hydraulic cylinder is installed respectively on multiple rear wheels on the other side of the vehicle; the corresponding hydraulic cylinders of multiple rear wheels on the same side are connected to each other and share the same expansion liquid container.

10. The vehicle suspension system according to claim 8, characterized in that The energy storage unit includes: a high-pressure gas tank, a pressure sensor, a pressure-maintaining valve, a steam pump, a low-pressure gas tank and an energy storage unit controller; The high-pressure pipeline of the high-pressure gas tank is connected to the inflation valve of each vehicle suspension spring, and the low-pressure pipeline of the low-pressure gas tank is connected to the deflation valve of each vehicle suspension spring; The vent valve also has an interface communicating with the external atmosphere.

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