Hydraulic suspension for vehicle body

Abstract

The utility model discloses a vehicle body hydraulic suspension, and belongs to the technical field of hydraulic active suspensions. The valve seat mainly comprises a valve seat body which is provided with two sets of hydraulic connectors. The spring is arranged on the frame, a hydraulic shock absorber is mounted at the top of the spring, and joints are arranged on the spring and the hydraulic shock absorber; the first hydraulic oil pipes are arranged in two groups, one group of the first hydraulic oil pipes is arranged between the spring and the valve seat, and the other group of the first hydraulic oil pipes is arranged between the hydraulic shock absorber and the valve seat; the oil pump is arranged on the side, away from the spring, of the valve seat, and two sets of second hydraulic oil pipes are arranged between the oil pump and the valve seat. According to the vehicle body hydraulic suspension, by arranging the two sets of driving modes, when the vehicle body hydraulic suspension is in the CDC mode, the two sets of CDC electromagnetic valves are used for controlling the comfort of the vehicle body, the other hydraulic active mode is started when the vehicle body mode occupies the leading position, oil is supplied to the hydraulic shock absorber through the oil pump, and the attitude angle of the vehicle body is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of hydraulic active suspension, and in particular to a vehicle body hydraulic suspension. Background Art

[0002] Semi-active suspension is a controllable suspension system. Its characteristic is that it does not change the suspension stiffness, but only improves the suspension performance by adjusting the suspension damping, so that the vehicle can maintain the best driving state under different road conditions.

[0003] For example, the patent with announcement number CN107176003B specifically discloses an active anti-body roll suspension system, which forms a parallelogram rotating around a parallel pin axis through upper and lower parallel rods and two kingpin seats. It can actively change the positional relationship between the body and the suspension when turning, so that the body can be restrained before it rolls over, thereby improving ride comfort and safety.

[0004] In the above patent, the device uses upper and lower parallel rods and two kingpin seats to actively change the relative position relationship between the vehicle body and the suspension during steering, thereby improving ride comfort. However, since this semi-active damping adjustable technology cannot effectively control the vehicle body posture, the vehicle body has a large roll angle when cornering, or a large pitch angle during sudden acceleration or braking. The above situations will reduce the passengers' ride comfort and driving safety. Therefore, it is necessary to provide a vehicle body hydraulic suspension that can be adaptively switched according to driving conditions to solve the above problems.

[0005] It should be noted that the above information disclosed in this Background section is only for understanding the background technology of the present application concept, and therefore, it may contain information that does not constitute prior art. Summary of the Invention

[0006] Based on the above problems existing in the prior art, the problem to be solved by this application is: to provide a vehicle body hydraulic suspension to achieve adaptive switching of vehicle body posture according to road conditions and improve ride comfort.

[0007] The technical solution adopted by this application to solve its technical problems is: a vehicle body hydraulic suspension, including a valve seat, on which two groups of hydraulic joints are provided; a spring, which is arranged on the frame, and a hydraulic shock absorber is installed on the top of the spring, and joints are provided on the spring and the hydraulic shock absorber; a first hydraulic oil pipe, which is provided with two groups, one group of first hydraulic oil pipes is provided between the spring and the valve seat, and the other group of first hydraulic oil pipes is provided between the hydraulic shock absorber and the valve seat; an oil pump, which is provided on the side of the valve seat away from the spring, and two groups of second hydraulic oil pipes are provided between the oil pump and the valve seat.

[0008] Furthermore, at least two groups of CDC solenoid valves are provided on the valve seat.

[0009] Furthermore, a bracket is installed on the top of the oil pump, and a motor is fixedly installed on a side of the bottom of the bracket away from the oil pump.

[0010] Furthermore, accumulators are installed on both sets of second hydraulic oil pipes.

[0011] Furthermore, the motor and the oil pump are connected via a coupling.

[0012] The beneficial effects of the present application are: a body hydraulic suspension provided by the present application, by setting two sets of driving modes, when in CDC mode, uses two sets of CDC solenoid valves to control the body comfort, with low energy consumption, meeting the user's economic needs; the other hydraulic active mode is started when the body mode dominates, and oil is supplied to the upper or lower cavity of the hydraulic shock absorber through the oil pump to provide the required main power, reduce the attitude angle of the body, and achieve safe driving of the vehicle.

[0013] In addition to the above-described purposes, features and advantages, the present application also has other purposes, features and advantages. The present application will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The drawings in the specification, which constitute a part of this application, are used to provide further understanding of this application. The illustrative embodiments of this application and their descriptions are used to explain this application and do not constitute improper limitations on this application.

[0015] In the attached figure:

[0016] Figure 1 This is an overall schematic diagram of a vehicle body hydraulic suspension in this application;

[0017] Figure 2 for Figure 1 Schematic diagram of the structure of the middle valve seat;

[0018] Among them, the reference numerals in the figures are:

[0019] 1. Suspension assembly; 2. Spring; 3. Hydraulic shock absorber; 4. Valve seat; 41. CDC solenoid valve; 42. Hydraulic connector; 5. First hydraulic oil pipe; 51. Second hydraulic oil pipe; 6. Oil pump; 7. Bracket; 71. Motor; 8. Accumulator. DETAILED DESCRIPTION

[0020] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0021] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0022] like Figure 1-Figure 2 As shown, the present application provides a vehicle body hydraulic suspension, including a suspension assembly 1, which is installed inside the vehicle and is used to control the vehicle body posture when the vehicle is driving or cornering. The suspension assembly 1 includes a spring 2, which is firmly installed on the vehicle frame to provide support. At the same time, a hydraulic shock absorber 3 is installed on the top of the spring 2. In the present application, the hydraulic shock absorber 3 and the spring 2 are of an integrated design;

[0023] The hydraulic shock absorber 3 is used to connect the wheel and the vehicle body and provide support for alleviating the impact transmitted by the road surface. At the same time, interfaces are provided on the hydraulic shock absorber 3 and the spring 2.

[0024] The suspension assembly 1 also includes a valve seat 4, inside which two groups of CDC solenoid valves 41 are fixedly installed. The CDC solenoid valves 41 are used to continuously adjust the damping force of the hydraulic shock absorber 3. At the same time, a hydraulic connector 42 is provided on one side of each group of CDC solenoid valves 41, and a first hydraulic oil pipe 5 is installed on both groups of hydraulic connectors 42. One group of the first hydraulic oil pipes 5 is connected to the interface on the hydraulic shock absorber 3, and the other group of the first hydraulic oil pipes 5 is connected to the interface on the spring 2, which provides a basis for subsequent oil allocation.

[0025] At the same time, two sets of second hydraulic oil pipes 51 are fixedly connected to the bottom of the valve seat 4, and accumulators 8 are installed on the two sets of second hydraulic oil pipes 51. In the present application, the accumulators 8 can be diaphragm type, bellows type, floating piston type, etc. The accumulators 8 are connected to the second hydraulic oil pipes 51 through a three-way joint to buffer the impact in the oil;

[0026] At the same time, an oil pump 6 is connected to the side of the second hydraulic oil pipe 51 away from the valve seat 4. The oil pump 6 is used to transport oil to the inside of the valve seat 4, and then supply oil to the hydraulic shock absorber 3. At the same time, a bracket 7 is fixedly installed on the top of the oil pump 6, and a motor 71 is fixedly installed on the bottom of the bracket 7 away from the oil pump 6. The motor 71 is connected to the oil pump 6 through a coupling, and the motor 71 is used to drive the oil pump 6 to work.

[0027] The suspension has two modes: CDC mode and hydraulic active mode. During normal driving, the system defaults to CDC mode. At this time, the damping force of the hydraulic shock absorber 3 can be controlled by adjusting the operation of the two sets of CDC solenoid valves 41, thereby optimizing ride comfort. In addition, this mode does not require the oil pump 6 to be started, reducing energy consumption.

[0028] When the vehicle body mode dominates, such as in sudden acceleration, sudden braking or cornering, the system will switch to the hydraulic active mode. At this time, the oil pump 6 is adjusted by the motor 71 to supply oil to the hydraulic shock absorber 3 to provide the required active force, thereby reducing the attitude angle of the vehicle body and improving driving stability and safety.

[0029] In summary, the present device sets two sets of driving modes. When in the CDC mode, two sets of CDC solenoid valves 41 are used to control the vehicle body comfort, with low energy consumption, meeting the user's economic needs. The other hydraulic active mode is started when the vehicle body mode dominates, and oil is supplied to the upper or lower cavity of the hydraulic shock absorber 3 through the oil pump 6 to provide the required main power, reduce the attitude angle of the vehicle body, and achieve safe driving of the vehicle.

[0030] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A vehicle body hydraulic suspension, characterized in that: include: A valve seat (4), wherein two sets of hydraulic joints (42) are provided on the valve seat (4); A spring (2), the spring (2) being arranged on a vehicle frame, a hydraulic shock absorber (3) being installed on the top of the spring (2), and joints being arranged on both the spring (2) and the hydraulic shock absorber (3); First hydraulic oil pipes (5), wherein two groups of first hydraulic oil pipes (5) are provided, wherein one group of first hydraulic oil pipes (5) is provided between the spring (2) and the valve seat (4), and the other group of first hydraulic oil pipes (5) is provided between the hydraulic shock absorber (3) and the valve seat (4); An oil pump (6) is provided on a side of the valve seat (4) away from the spring (2), and two groups of second hydraulic oil pipes (51) are provided between the oil pump (6) and the valve seat (4).

2. The vehicle body hydraulic suspension according to claim 1, characterized in that: At least two groups of CDC solenoid valves (41) are arranged on the valve seat (4).

3. The vehicle body hydraulic suspension according to claim 1, characterized in that: A bracket (7) is installed on the top of the oil pump (6), and a motor (71) is fixedly installed on the side of the bottom of the bracket (7) away from the oil pump (6).

4. The vehicle body hydraulic suspension according to claim 1, characterized in that: Accumulators (8) are installed on both sets of the second hydraulic oil pipes (51).

5. The vehicle body hydraulic suspension according to claim 3, characterized in that: The motor (71) and the oil pump (6) are connected via a coupling.

Images