Vehicle chassis height adjusting system

Abstract

The invention relates to a vehicle chassis height adjusting system, and belongs to the technical field of vehicles, the vehicle chassis height adjusting system comprises four groups of elastic supporting assemblies installed between a wheel assembly and a chassis, and each group of elastic supporting assembly is composed of a suspension spring and a shock absorber; each elastic supporting assembly is connected with one lifting actuator, and the lifting actuators are used for driving the elastic supporting assemblies to ascend or descend so as to ascend or descend the chassis; and the attitude control module is connected with the four lifting actuators, and the attitude control module is used for controlling the operation of the four lifting actuators. By means of the structure, the four lifting actuators drive the four sets of elastic supporting assemblies to ascend and descend correspondingly, so that the chassis ascends or descends, the ground clearance of a vehicle is adjusted, it is guaranteed that the vehicle can smoothly pass through various grounds, and a vehicle body can be leveled when the vehicle is parked on the uneven ground.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of vehicles, and particularly relates to a vehicle chassis height adjusting system. BACKGROUND

[0002] Suspension springs and shock absorbers are usually configured on a vehicle, wherein the suspension springs are used to support the weight of the vehicle body and buffer road impact, and the shock absorbers are used to suppress the reciprocating vibration of the suspension springs. The suspension springs and the shock absorbers form an elastic support assembly and jointly act to not only buffer road bumps but also constrain the movement track of the wheels and suppress the bounce of the springs, so that the vehicle runs more smoothly and is more stable in control.

[0003] At present, four sets of the above-mentioned elastic support assemblies are usually configured on a vehicle, which correspond to the left front wheel, the right front wheel, the left rear wheel and the right rear wheel of the vehicle respectively. In addition, the above-mentioned elastic support assemblies corresponding to the left front wheel and the right front wheel of most vehicles are suspension struts formed by the suspension springs sleeved outside the shock absorbers; the above-mentioned elastic support assemblies corresponding to the left rear wheel and the right rear wheel of some vehicles are also suspension struts, but the suspension springs and the shock absorbers corresponding to the left rear wheel and the right rear wheel of most vehicles are installed separately.

[0004] The above-mentioned elastic support assembly in the prior art usually only has the function of elastic expansion and contraction and does not have the remaining lifting function, that is, the vehicle body cannot be lifted by the above-mentioned elastic support assembly. When encountering damaged road surfaces, muddy road surfaces, waterlogged road surfaces and mountain road surfaces that some camping / off-road enthusiasts will go to, most vehicles with low chassis are prone to chassis scratches, and in severe cases, the vehicle may be damaged. SUMMARY

[0005] The present application provides a vehicle chassis height adjusting system to solve the problem that the above-mentioned elastic support assembly in the prior art does not have the remaining lifting function, that is, the vehicle body cannot be lifted by the above-mentioned elastic support assembly. When encountering damaged road surfaces, muddy road surfaces, waterlogged road surfaces and mountain road surfaces that some camping / off-road enthusiasts will go to, most vehicles with low chassis are prone to chassis scratches, and in severe cases, the vehicle may be damaged.

[0006] The present application is implemented by the following technical scheme: a vehicle chassis height adjusting system, comprising:

[0007] Four sets of elastic support assemblies installed between the wheel assemblies and the chassis, each set of the elastic support assemblies being composed of one suspension spring and one shock absorber;

[0008] Four lifting actuators, each of the elastic support assemblies is connected with a lifting actuator, the lifting actuator is used for driving the elastic support assemblies to ascend or descend, so as to raise or lower the chassis;

[0009] A posture control module is connected with the four lifting actuators, and the posture control module is used for controlling the four lifting actuators to operate.

[0010] Further, in order to better realize the present application, the elastic support assembly is a suspension strut formed by sleeving the suspension spring outside the shock absorber, and the lifting actuator is connected with the shock absorber.

[0011] Further, in order to better realize the present application, the suspension spring in the elastic support assembly is installed separately from the shock absorber, and the lifting actuator is connected with the suspension spring.

[0012] Further, in order to better realize the present application, the lifting actuator is a hydraulic lifting mechanism.

[0013] The posture control module comprises an oil pump, a oil distribution block and a switch valve, the oil distribution block is provided with a cavity, the outer wall of the oil distribution block is provided with a first oil port and four second oil ports, the first oil port and the second oil ports are in communication with the cavity, each of the second oil ports is provided with a switch valve, the first oil port is connected with the oil pump through an oil pipe, the four second oil ports are respectively connected with the four hydraulic lifting mechanisms through oil pipes, and the oil pump is connected with a hydraulic oil source.

[0014] Further, in order to better realize the present application, the posture control module further comprises:

[0015] An auxiliary accumulator, the outer wall of the oil distribution block is further provided with a third oil port, the third oil port is in communication with the cavity, the third oil port is also provided with a switch valve, and the auxiliary accumulator is connected with the third oil port through an oil path.

[0016] Further, in order to better realize the present application, the posture control module further comprises:

[0017] A height sensor, the height sensor is installed on the chassis and is used for monitoring the relative height between the chassis and the ground.

[0018] The height sensor, the oil pump and the switch valve are connected with an electronic control system of a vehicle, so that the electronic control system automatically controls the working states of the oil pump and the switch valve according to the monitoring data of the height sensor.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] The vehicle chassis height adjustment system provided by the present invention includes four sets of elastic support components, four lifting actuators, and an attitude control module. Each set of elastic support components includes a suspension spring and a shock absorber. The four sets of elastic support components are installed between the wheel assembly and the chassis and correspond to the four wheels respectively. Each elastic support component is connected to a lifting actuator, which is used to drive the elastic support component to rise or fall, thereby raising or lowering the chassis. The attitude control module is connected to all four lifting actuators and is used to control the operation of the four lifting actuators.

[0021] Through the above structure, four lifting actuators drive four sets of elastic support components to rise or fall, thereby raising or lowering the chassis and adjusting the vehicle's ground clearance. When driving on flat ground, the chassis is lowered to a suitable position, and when driving on uneven ground, the chassis is raised to a suitable position to avoid scraping the chassis with the ground, ensuring that the vehicle can pass smoothly on various surfaces. It can also level the vehicle body when parking on uneven ground. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a structural block diagram of the vehicle chassis height adjustment system provided in an embodiment of the present invention.

[0024] In the picture:

[0025] 1-Elastic support assembly, 2-Lifting actuator, 3-Oil pump, 4-Oil distributor, 5-Switch valve, 6-Hydraulic oil source, 7-Auxiliary accumulator. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0027] Example:

[0028] like Figure 1 As shown, the vehicle chassis height adjustment system provided in this embodiment includes four sets of elastic support components 1, four lifting actuators 2, and an attitude control module, wherein:

[0029] Each set of elastic support components 1 includes a suspension spring and a shock absorber. All four sets of elastic support components 1 are installed between the wheel assembly and the chassis, corresponding to the four wheels respectively. It should be noted that the elastic support components 1 composed of suspension springs and shock absorbers are the same as in existing technology, so they will not be described in detail here. Unlike existing technology, each elastic support component 1 is connected to a lifting actuator 2. The lifting actuator 2 is used to drive the elastic support component 1 to rise or fall, thereby raising or lowering the chassis. An attitude control module is connected to all four lifting actuators 2, and the attitude control module is used to control the independent operation of the four lifting actuators 2. Specifically, when the four lifting actuators 2 operate simultaneously and in the same direction, they can drive the vehicle chassis to rise or fall smoothly. When one or more of the four lifting actuators 2 operate individually, the attitude of the vehicle body can be adjusted, making it easier to level the vehicle body on uneven ground. For example, when the left front wheel is in a pothole, the lifting actuator 2 of the elastic support component 1 located at the left front can be activated, thereby raising the left front part of the vehicle body.

[0030] Through the above structure, the four lifting actuators 2 drive the four sets of elastic support components 1 to rise or fall, thereby raising or lowering the chassis and adjusting the vehicle's ground clearance. When driving on flat ground, the chassis is lowered to a suitable position, and when driving on uneven ground, the chassis is raised to a suitable position to avoid scraping the chassis with the ground and ensure that the vehicle can pass smoothly on various surfaces.

[0031] Optionally, in this embodiment, the elastic support component 1 is a suspension strut formed by a suspension spring sleeved outside the shock absorber. In this case, the aforementioned lifting actuator 2 is connected to the aforementioned shock absorber, that is, the lifting actuator 2 drives the entire suspension strut to rise or fall. Specifically, the connection between the lifting actuator 2 and the shock absorber is applicable to the suspension struts corresponding to the front wheels of the vehicle or to the suspension struts corresponding to part of the rear wheels of the vehicle.

[0032] Optionally, in this embodiment, the suspension spring and shock absorber in the elastic support assembly 1 are installed separately. In this case, the lifting actuator 2 is connected to the suspension spring, that is, the lifting actuator 2 only drives the suspension spring to rise or fall. Specifically, the case where the lifting actuator 2 is connected to the suspension spring is applicable to the above-mentioned elastic support assembly 1 corresponding to the rear wheels of some vehicles (that is, the suspension spring and shock absorber are installed separately).

[0033] Optionally, the lifting actuator 2 in this embodiment can be a linear motion output mechanism capable of electronic or remote control, such as an electric telescopic rod or a cylinder. Preferably, the lifting actuator 2 in this embodiment is a hydraulic lifting mechanism, such as a hydraulic jack or a hydraulic cylinder with a vertically extending telescopic shaft. In this case, the attitude control module includes an oil pump 3, an oil distribution block 4, and a switching valve 5. The oil distribution block 4 has a cavity, and its outer wall has a first oil port and four second oil ports. Both the first and second oil ports are connected to the cavity. Each second oil port has a switching valve 5 installed in it, which controls the opening and closing of the corresponding oil port. Preferably, the switching valve 5 is a solenoid valve. The first oil port is connected to the oil pump 3 via an oil pipe, and the four second oil ports are respectively connected to four hydraulic lifting mechanisms via oil pipes. The oil pump 3 is connected to a hydraulic oil source 6, which is a vehicle-mounted hydraulic oil tank.

[0034] Thus, when the oil pump 3 operates and draws hydraulic oil into the cavity of the aforementioned oil distribution block 4, while keeping the switch valve 5 in each oil port open, the oil will simultaneously enter the four hydraulic lifting mechanisms, driving them to rise and thus raising the chassis relative to the ground. After reaching the designated height, the four switch valves 5 are closed to ensure the vehicle body remains at the corresponding height. When it is necessary to lower the chassis, the four switch valves 5 are opened, using the vehicle body's own weight to pump the oil back to the hydraulic oil source 6, or the oil pump 3 actively discharges the oil. Furthermore, by controlling the opening and closing of different switch valves 5, different lifting actuators 2 can be operated, thereby achieving attitude adjustment; in other words, the four lifting actuators 2 can operate independently.

[0035] With the help of the aforementioned oil distribution block 4 and multiple switching valves 5, multiple lifting actuators 2 can operate independently with only one oil pump 3. Alternatively, four oil pumps 3 can be installed. In this case, the oil distribution block 4 is not needed; the four oil pumps 3 are connected to the four lifting actuators 2 respectively, still enabling independent operation of the four lifting actuators 2. Or, if independent operation of the four lifting actuators 2 is not required, one oil pump 3 can simultaneously inject oil into all four lifting actuators 2.

[0036] Optionally, the vehicle chassis height adjustment system provided in this embodiment also includes an auxiliary accumulator 7. In fact, the auxiliary accumulator 7 is a container capable of holding high-pressure hydraulic oil. The auxiliary accumulator 7 is mounted on the vehicle body. A third oil port is also provided on the outer wall of the oil distribution block 4, which is connected to the cavity. A switching valve 5 is also installed in the third oil port. The auxiliary accumulator 7 is connected to the third oil port via an oil circuit. In use, first ensure that the switching valves 5 in the four second oil ports are closed while ensuring that the switching valve 5 in the aforementioned third oil port is open. Then, start the oil pump 3 to inject hydraulic oil into the aforementioned auxiliary accumulator 7, giving the hydraulic oil in the auxiliary accumulator 7 a certain pressure. Then, close the switching valve 5 in the third oil port. If it is necessary to raise the vehicle body, open the switch valve 5 in the second oil port (that is, the switch valve 5 corresponding to the lifting actuator 2) and the switch valve 5 in the third oil port (that is, the switch valve 5 corresponding to the auxiliary accumulator 7). At this time, the hydraulic oil in the auxiliary accumulator 7 will also be injected into the cavity of the oil distribution block 4 under pressure, so that more hydraulic oil is injected into the actuator per unit time. In this way, the time to raise the vehicle body can be shortened, and the command to change the vehicle body posture can be responded to more quickly.

[0037] Of course, if a rapid response is not required, the auxiliary accumulator 7 mentioned above can be omitted.

[0038] Optionally, the vehicle chassis height adjustment system provided in this embodiment also includes a height sensor, which is installed on the chassis and used to monitor the relative height between the chassis and the ground. The height sensor, oil pump 3, and switching valve 5 are all connected to the vehicle's built-in electronic control system, so that the electronic control system can automatically control the working state of the oil pump 3 and the switching valve 5 based on the monitoring data of the height sensor.

[0039] It is worth noting that the height sensor mentioned above is the same as the height sensing element used in current vehicles, so it will not be described in detail here. By installing the height sensor, it is possible to ensure that the vehicle rises to a specified height and maintains it. Specifically, the height sensor accurately informs the chassis of its height relative to the ground. When the current height is reached, the height sensor sends a signal to the vehicle's built-in electronic control system, which then controls the switch valve 5 in the first oil port to close and controls the oil pump 3 to stop operating.

[0040] By installing a height sensor, the vehicle body can be raised to any height within its travel range and held, achieving stepless adjustment of the vehicle height. Of course, if stepless height adjustment is not required, the height sensor can be omitted. In this case, the vehicle body can only rise to a specific height (it should be noted that this specific height corresponds to the maximum height that the lifting actuator 2 can reach during operation). Furthermore, it should be noted that the vehicle's built-in electronic control system is a current vehicle configuration and is existing technology; therefore, it will not be described in detail here.

[0041] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope described in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A vehicle chassis height adjustment system, characterized in that, include: Group 4 An elastic support assembly (1) is installed between the wheel assembly and the chassis, each of the elastic support assemblies (1) consisting of a suspension spring and a shock absorber; Four lifting actuators (2), each of the elastic support components (1) is connected to one of the lifting actuators (2), the lifting actuators (2) are used to drive the elastic support components (1) to rise or fall, so as to raise or lower the chassis; The attitude control module is connected to all four lifting actuators (2) and is used to control the operation of the four lifting actuators (2).

2. The vehicle chassis height adjustment system according to claim 1, characterized in that: The elastic support assembly (1) is a suspension strut formed by the suspension spring sleeved outside the shock absorber, and the lifting actuator (2) is connected to the shock absorber.

3. The vehicle chassis height adjustment system according to claim 1, characterized in that: The suspension spring in the elastic support assembly (1) is installed separately from the shock absorber, and the lifting actuator (2) is connected to the suspension spring.

4. The vehicle chassis height adjustment system according to any one of claims 1-3, characterized in that: The lifting actuator (2) is a hydraulic lifting mechanism; The attitude control module includes an oil pump (3), an oil distribution block (4), and a switching valve (5). The oil distribution block (4) has a cavity inside. The outer wall of the oil distribution block (4) is provided with a first oil port and four second oil ports. The first oil port and the second oil ports are connected to the cavity. Each second oil port is equipped with a switching valve (5). The first oil port is connected to the oil pump (3) through an oil pipe. The four second oil ports are respectively connected to the four hydraulic lifting mechanisms through oil pipes. The oil pump (3) is connected to a hydraulic oil source (6).

5. The vehicle chassis height adjustment system according to claim 4, characterized in that, Also includes: The auxiliary accumulator (7) is provided with a third oil port on the outer wall of the oil distribution block (4). The third oil port is connected to the cavity. The third oil port is also equipped with a switch valve (5). The auxiliary accumulator (7) is connected to the third oil port through an oil circuit.

6. The vehicle chassis height adjustment system according to claim 4, characterized in that, Also includes: A height sensor, mounted on the chassis, is used to monitor the relative height of the chassis to the ground; The height sensor, the oil pump (3), and the switching valve (5) are all connected to the vehicle's own electronic control system so that the electronic control system can automatically control the working state of the oil pump (3) and the switching valve (5) based on the monitoring data of the height sensor.

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