Hydraulic supply integrated unit of air spring for active suspension
By designing an integrated hydraulic supply unit for active suspension, the space and weight problems caused by the separation of the actuator and energy supply in the prior art are solved, and driving comfort is improved by changing the air spring stiffness.
Patent Information
- Application Number
- CN202421905199.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-07
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-08-07
AI Technical Summary
In the existing active suspension system, the actuator and energy supply are separated, resulting in large space occupancy, heavy weight, difficult to arrange the whole vehicle, and consume a lot of energy on the vehicle, and cannot effectively change the characteristics of the suspension elastic elements.
A hydraulic supply integration unit for active suspension is designed. By integrating the air spring piston, main capsule skin assembly, auxiliary capsule skin assembly and hydraulic cylinder piston, hydraulic oil is used to control the expansion and contraction of the auxiliary capsule skin through the oil injection hole, lifting the suspension and changing the air spring stiffness.
The integration of the actuator and energy supply is achieved, reducing space and weight occupation, improving the flexibility of the vehicle layout, and improving driving comfort by changing the air spring stiffness.
Smart Images
Figure CN222880214U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the field of air spring accessories, in particular to a hydraulic supply integrated unit for an air spring used for an active suspension. Background Art
[0002] The active suspension system, as the name implies, uses sensors or cameras to identify the road surface in advance, and then actively activates the suspension after analyzing and processing the collected information, thereby ensuring the comfort of the passengers. In addition, the active suspension can also be used in scenarios such as vehicle escape and emergency avoidance.
[0003] The active suspension system usually includes an actuator, an energy supply, a sensor and a controller. In the existing solution, the actuator and the energy supply are usually divided into two parts, which occupy a large space and weigh a lot. The present invention integrates the two to achieve lightweight and modularization.
[0004] Currently, conventional active suspension actuators are all based on shock absorbers, which can only lift the suspension system but cannot change the characteristics of the suspension elastic elements. In addition, the actuator and energy supply are separated, which occupies a large space and is difficult to arrange in the entire vehicle. In addition, the actuator is heavy and consumes a lot of energy for the vehicle. Summary of the invention
[0005] The utility model aims to provide a hydraulic pressure supply integrated unit for an air spring used in an active suspension with a compact structure.
[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions: a hydraulic supply integrated unit for an active suspension air spring, which includes an empty spring piston, a main bladder skin assembly and a secondary bladder skin assembly installed on the empty spring piston, a main cavity is formed between the main bladder skin assembly and the empty spring piston, the secondary bladder skin assembly includes a secondary bladder skin covered on the empty spring piston, a secondary cavity is formed between the inner wall of the secondary bladder skin and the outer wall of the empty spring piston, a hydraulic cavity is formed in the empty spring piston, the integrated unit also includes a hydraulic cylinder piston slidably connected to the hydraulic cavity, and a driving part for driving the hydraulic cylinder piston to move, an oil filling hole connecting the secondary cavity and the hydraulic cavity is provided on the empty spring piston, and the driving part controls the hydraulic oil to enter or discharge the secondary cavity through the hydraulic cylinder piston, thereby controlling the expansion and contraction of the secondary bladder skin, thereby lifting the suspension and changing the stiffness of the air spring.
[0007] In another embodiment, the driving part includes a motor fixed to the lower end of the empty spring piston and a ball screw transmission connected to the motor, the upper end of the ball screw is rotationally connected to the empty spring piston and the upper end of the ball screw is stuck in the empty spring piston, and the ball screw moves up and down to drive the empty spring piston to move up and down.
[0008] In another embodiment, the motor is a DDR torque motor, the nut of the ball screw is fixedly connected to the rotor of the motor, and the rotation of the rotor drives the nut of the ball screw to rotate, thereby driving the screw of the ball screw to move up and down.
[0009] In another embodiment, the main bladder skin assembly includes a main bladder skin whose lower end is folded inward and fixedly mounted on the empty spring piston, and an empty spring support fixed to the upper end of the main bladder skin by a buckling ring to seal the main bladder skin.
[0010] In another embodiment, the main bladder skin assembly includes a support ring sleeved on the upper end portion of the main bladder skin.
[0011] In another embodiment, the main bladder skin assembly includes a protective sleeve which is sleeved on the main bladder skin and covers the outside of the support ring.
[0012] In another embodiment, the upper end of the auxiliary bag skin is fixedly mounted on the upper end of the empty spring piston through a retaining ring, the lower end of the auxiliary bag skin is fixedly mounted on the lower end of the empty spring piston through a retaining ring, and the folded part of the main bag skin is mounted on the upper end of the auxiliary bag skin.
[0013] The beneficial effects of the utility model are as follows: the utility model achieves the purpose of lightweight and modularization by integrating the actuator and the energy supply; the function of active suspension is realized by lifting the air spring, and the shape and effective volume of the air spring can be changed by the expansion and contraction of the auxiliary bladder skin, thereby changing the spring stiffness and further improving the driving comfort. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 It is a structural schematic diagram of the utility model. DETAILED DESCRIPTION
[0015] The following is a detailed description of the present invention in conjunction with the embodiments shown in the accompanying drawings:
[0016] like Figure 1 As shown, the hydraulic supply integrated unit of the air spring for active suspension includes an empty spring piston 1, a main bladder skin assembly and an auxiliary bladder skin assembly installed on the empty spring piston 1, a main chamber A is formed between the main bladder skin assembly and the empty spring piston 1, the auxiliary bladder skin assembly includes an auxiliary bladder skin 2 coated on the empty spring piston 1, an auxiliary chamber B is formed between the inner wall of the auxiliary bladder skin 2 and the outer wall of the empty spring piston 1, a hydraulic chamber C is formed in the empty spring piston 1, the integrated unit also includes a hydraulic cylinder piston 3 slidably connected to the hydraulic chamber C, and a driving part for driving the hydraulic cylinder piston 3 to move, an oil filling hole 4 connecting the auxiliary chamber B and the hydraulic chamber C is provided on the empty spring piston 1, the driving part controls the hydraulic oil to enter or discharge the auxiliary chamber B through the hydraulic cylinder piston 3, thereby controlling the expansion and contraction of the auxiliary bladder skin, thereby lifting the suspension and changing the stiffness of the air spring.
[0017] Specifically, the driving part includes a motor 5 fixed to the lower end of the empty spring piston 1 and a ball screw connected to the motor. The motor 5 is a DDR torque motor. The nut 6 of the ball screw is fixedly connected to the rotor 51 of the motor 5. The rotation of the rotor drives the nut 6 of the ball screw to rotate, thereby driving the screw 7 of the ball screw to move up and down. The upper end of the screw 7 of the ball screw is rotatably connected to the empty spring piston 1 and the upper end of the screw 7 of the ball screw is stuck in the empty spring piston 1. The screw 7 of the ball screw moves up and down, driving the empty spring piston 1 to move up and down.
[0018] The main bladder skin assembly includes a main bladder skin 8 which is folded inward at the lower end and fixedly mounted on the empty spring piston 1 by a retaining ring 0, an empty spring support 9 which is fixed to the upper end of the main bladder skin 8 by a retaining ring 0 to seal the main bladder skin, a support ring 10 mounted on the upper end of the main bladder skin 8, and the main bladder skin assembly includes a protective tube 11 which is mounted on the main bladder skin and covered outside the support ring.
[0019] The upper end of the auxiliary bag skin is fixedly mounted on the upper end of the empty spring piston 1 through a retaining ring 0, the lower end of the auxiliary bag skin is fixedly mounted on the lower end of the empty spring piston 1 through a retaining ring 0, and the folded part of the main bag skin is mounted on the upper end of the auxiliary bag skin.
[0020] The working principle is to control the motor to drive the nut 6 of the ball screw fixed on the motor rotor to rotate, and then drive the screw 7 to move linearly. The screw 6 then drives the hydraulic cylinder piston to push the hydraulic oil in the hydraulic oil chamber into the auxiliary chamber B through the oil filling hole 4 on the air spring piston. The expansion and contraction of the auxiliary chamber B achieves the purpose of lifting and changing the stiffness of the air spring.
[0021] The embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable people familiar with the technology to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A hydraulic supply integrated unit for an air spring for an active suspension, comprising an empty spring piston, a main bladder skin assembly mounted on the empty spring piston, and a secondary bladder skin assembly, wherein a main cavity is formed between the main bladder skin assembly and the empty spring piston, and the secondary bladder skin assembly comprises a secondary bladder skin covering the empty spring piston, wherein a secondary cavity is formed between an inner side wall of the secondary bladder skin and an outer side wall of the empty spring piston, and wherein: A hydraulic cavity is formed in the empty spring piston, and the integrated unit also includes a hydraulic cylinder piston slidably connected to the hydraulic cavity and a driving part for driving the hydraulic cylinder piston to move. The empty spring piston is provided with an oil filling hole connecting the auxiliary cavity and the hydraulic cavity, and the driving part controls the hydraulic oil to enter or discharge from the auxiliary cavity through the hydraulic cylinder piston.
2. The hydraulic pressure supply integrated unit for an active suspension air spring according to claim 1, characterized in that: The driving part includes a motor fixed to the lower end of the empty spring piston and a ball screw transmission-connected to the motor. The upper end of the ball screw is rotationally connected to the empty spring piston and the upper end of the ball screw is stuck in the empty spring piston.
3. The hydraulic pressure supply integrated unit for an active suspension air spring according to claim 2, characterized in that: The motor is a DDR torque motor, and the nut of the ball screw is fixedly connected to the rotor of the motor.
4. The hydraulic pressure supply integrated unit for an active suspension air spring according to claim 1, characterized in that: The main bladder skin assembly includes a main bladder skin whose lower end is folded inward and fixedly sleeved on the empty spring piston, and an empty spring support fixed to the upper end of the main bladder skin through a buckling ring to seal the main bladder skin.
5. The hydraulic pressure supply integrated unit for an active suspension air spring according to claim 4, characterized in that: The main bladder skin assembly includes a support ring sleeved on the upper end portion of the main bladder skin.
6. The hydraulic pressure supply integrated unit for an active suspension air spring according to claim 5, characterized in that: The main bladder skin component includes a protective tube which is sleeved on the main bladder skin and covered on the outside of the support ring.
7. The hydraulic pressure supply integrated unit for an active suspension air spring according to claim 4, characterized in that: The upper end of the auxiliary bag skin is fixedly mounted on the upper end of the empty spring piston through a buckling ring, the lower end of the auxiliary bag skin is fixedly mounted on the lower end of the empty spring piston through a buckling ring, and the folded part of the main bag skin is mounted on the upper end of the auxiliary bag skin.