CN210397565U

CN210397565U - Hydraulic suspension

Info

Publication number: CN210397565U
Application number: CN201921182633.3U
Authority: CN
Inventors: 吴东风; 唐广山
Original assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely Automobile Research Institute Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Zhejiang Geely Automobile Research Institute Co Ltd
Priority date: 2019-07-25
Filing date: 2019-07-25
Publication date: 2020-04-24
Anticipated expiration: 2029-07-25

Abstract

The utility model provides a hydraulic pressure suspension relates to vehicle parts technical field. The rubber spring liquid feeding device comprises a rubber main spring, a first mounting structure and a second mounting structure which are connected with the rubber main spring, an upper liquid chamber and a lower liquid chamber, wherein a flow channel assembly and a decoupling film are arranged between the upper liquid chamber and the lower liquid chamber, and liquid is filled in the upper liquid chamber and the lower liquid chamber. The utility model provides a pair of hydraulic suspension to big damping and high dynamic stiffness performance when being used for promoting hydraulic suspension low frequency.

Description

Hydraulic suspension

Technical Field

The utility model relates to a vehicle parts technical field especially relates to a hydraulic pressure suspension.

Background

Along with the wide application of technologies such as air intake pressurization, direct injection in a cylinder, stratified combustion and the like of an automobile engine, the power and the torque of the engine are larger and larger, the proportion of the vibration generated by the engine in the whole automobile vibration is larger and larger, and at the moment, the influence of the suspension shock insulation performance of the engine on the riding comfort of the automobile is more and more obvious. Traditional shock insulation component is mostly pure rubber structure, and this structural damping is less, is difficult to play effective inhibitory action to the large-amplitude vibration of engine, and the dynamic hardening is obvious, also can't effectively keep apart high frequency noise. And the ingenious internal structure design of hydraulic suspension has the high rigidity characteristic of big damping when very easily realizing the low frequency, has the low rigidity characteristic of little damping when the high frequency, can be better satisfy the requirement that automobile power assembly shock insulation and interior fall the noise of car.

In the prior art, an engine suspension is an important element for isolating the vibration of an engine from being transmitted to a vehicle body or a chassis, and the engine is controlled to be located in a certain space during working so as to prevent parts from being damaged and avoid obvious impact on surrounding connecting pieces due to excessive displacement or rotation angle. The vibration isolation performance of the hydraulic suspension is mainly embodied by a main spring and structures such as a flow channel, a cover plate, a decoupling film, a leather cup and the like in the main spring, and the limiting performance is provided by a limiting structure attached to the main spring of the suspension and a shell of a vehicle body.

The core and the rubber main spring are vulcanized together, and then the core is connected by the supporting arm through a bolt, and the rubber main spring plays a main role in supporting and partially damping. The interior of the hydraulic suspension is divided into an upper cavity and a lower cavity, namely an upper liquid chamber and a lower liquid chamber, and liquid can flow between the upper cavity and the lower liquid chamber through a ring-shaped or spiral flow passage. A limiting clamping plate with holes is arranged between the upper liquid chamber and the lower liquid chamber, rubber between the upper liquid chamber and the lower liquid chamber is called a decoupling film, and the hydraulically suspended decoupling film can freely move between the limiting plates. When the motor vehicle passes through a speed bump or a bumpy road condition at a low speed and the vertical direction has large jumping amplitude, the rubber main spring has large pulling and pressing amplitude in the direction, when the rubber main spring is pressed, the elastic deformation of the rubber applies pressure to the liquid, the decoupling film does not move any more after reaching the limit position, the liquid is prevented from flowing to the lower cavity, the leather cup at the bottom of the lower cavity has low rigidity, the lower cavity is like a liquid container, the liquid must flow into the lower cavity through the flow channel, the liquid in the flow channel forms a moving mass body, and the movement of the mass body generates a large inertia force and friction loss to offset part of external input excitation, so that the vibration energy is attenuated.

In fact, suspension development is often limited by the requirement of the performance of the whole vehicle on large low-frequency damping of the suspension, and a simple and effective method for improving the damping performance is to increase the length of a flow channel. The increase in the length of the flow channel would necessitate the development of a front cabin space which is compact at all times, and the method of increasing the vertical space to increase the flow channel is very limited and almost impossible with the existing arrangements. How to improve the structure of hydraulic mount makes big damping and high dynamic stiffness performance when promoting the low frequency to better satisfy the requirement that the car power assembly shock insulation and fall making an uproar in the car, it is significant to taking the comfort.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a hydraulic suspension to big damping and high dynamic stiffness performance when being used for promoting hydraulic suspension low frequency.

Particularly, the utility model provides a hydraulic suspension, including rubber main spring, with first mounting structure and second mounting structure, upper liquid room and lower liquid room that rubber main spring connects, be provided with runner assembly and decoupling zero membrane between upper liquid room and the lower liquid room, upper liquid room and lower liquid room inside are filled with liquid, be provided with in the runner assembly and be used for the intercommunication first runner and the second runner of upper liquid room and lower liquid room, first runner and second runner are located same height in the runner assembly.

Optionally, the first and second flow channels are arranged side by side within the flow channel assembly.

Optionally, the first flow channel and the second flow channel are arranged in a planar spiral within the flow channel assembly.

Optionally, a circular groove is formed in the middle of the runner assembly, and the decoupling film is arranged in the circular groove.

Optionally, the flow channel assembly includes an upper flow channel plate and a lower flow channel plate, a lower surface of the upper flow channel plate is attached to an upper surface of the lower flow channel plate, and the first flow channel and the second flow channel are disposed between the upper flow channel plate and the lower flow channel plate.

Optionally, the upper and lower flow field plates are plastic parts press-fitted by snap-fitting.

Optionally, the decoupling film is cylindrical, the upper end of the decoupling film is attached to the lower surface of the upper runner plate, and the lower end of the decoupling film is attached to the upper surface of the lower runner plate.

Optionally, a leather cup is arranged below the runner assembly, the upper liquid chamber is arranged between the rubber main spring and the runner assembly, and the lower liquid chamber is arranged between the runner assembly and the leather cup.

Optionally, the first mounting structure is arranged on the upper portion of the rubber main spring, the second mounting structure is arranged on the lower peripheral side of the rubber main spring, the lower portion of the rubber main spring is in a bell-shaped hollow structure, and the runner assembly, the decoupling film and the leather cup are arranged in the bell-shaped hollow structure on the lower portion of the rubber main spring.

Optionally, an upward convex spherical surface is arranged in the middle of the packing cup, and a gap is arranged between the lower surface of the packing cup and the lower runner plate.

The utility model provides a pair of hydraulic suspension, for the hydraulic suspension of double-flow-passage, it is used for the intercommunication through being provided with in the runner subassembly go up the first runner and the second runner of liquid chamber and lower liquid chamber, first runner and second runner are located same height in the runner subassembly for increase two circulations in a runner subassembly and increase the length of runner, need not increase hydraulic suspension's height simultaneously, strive for more spaces for the total layout of frame.

The utility model provides a pair of hydraulic suspension, under the loaded state, hydraulic suspension's last liquid chamber reduces because of the pressurized volume, and some liquid will flow into down the liquid chamber through two runners to tend to balance. When the vibration energy dissipation device is excited by low-frequency large-amplitude external force, liquid in the upper liquid chamber and the lower liquid chamber flows through the flow channel, due to the arrangement of the double flow channels, the flow channel is lengthened, the mass of the liquid in the flow channel is increased, the mass of the moving liquid is increased, the generated inertia force is increased, and the energy loss along the path is also increased, so that the vibration energy dissipation device has a better damping characteristic and can dissipate vibration energy more quickly.

The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the present invention will be described in detail hereinafter, by way of illustration and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:

fig. 1 is a schematic structural view of a hydraulic mount according to an embodiment of the present invention;

fig. 2 is a schematic block diagram of a hydraulically suspended flow passage assembly according to fig. 1.

Detailed Description

Fig. 1 is a schematic structural diagram of a hydraulic mount according to an embodiment of the present invention. Fig. 2 is a schematic block diagram of a hydraulically suspended flow passage assembly according to fig. 1. As shown in fig. 1 to 2, a hydraulic mount may generally include a rubber main spring 1, first and

second mounting structures

2 and 3 connected to the rubber main spring 1, and upper and

lower fluid chambers

4 and 5. A flow channel assembly 6 and a decoupling membrane 7 are arranged between the upper liquid chamber 4 and the lower liquid chamber 5. The upper liquid chamber 4 and the lower liquid chamber 5 are filled with liquid. The flow path block 6 is provided therein with a first flow path 61 and a second flow path 62 for communicating the upper liquid chamber 4 and the lower liquid chamber 5. The first flow channel 61 and the second flow channel 62 are located at the same height within the flow channel assembly 6. By arranging the first flow channel 61 and the second flow channel 62 at the same height in the flow channel assembly 6, the design of double flow channels can be realized without increasing the overall height of the hydraulic suspension, and in a loaded state, because the volume of the upper liquid chamber 4 of the hydraulic suspension is reduced under pressure, a part of liquid flows into the lower liquid chamber 5 through the first flow channel 61 and the second flow channel 62 and tends to balance. When the vibration energy dissipation device is excited by low-frequency large-amplitude external force, liquid in the upper liquid chamber and the lower liquid chamber flows through the first flow channel 61 and the second flow channel 62, due to the arrangement of the two flow channels, the flow channels are lengthened, the mass of the liquid in the flow channels is increased, the moving liquid mass is increased, the generated inertia force is increased, and the energy loss along the way is also increased, so that the vibration energy dissipation device has a better damping characteristic and can dissipate vibration energy more quickly.

Specifically, the first mounting structure 2 is provided on the upper portion of the rubber main spring 1. The first mounting structure 2 is mounted on an engine of a vehicle. The second mounting structure 3 is provided on the lower peripheral side of the rubber main spring 1. The second mounting structure 3 may comprise a hydraulically suspended housing, a support bracket or the like. The second mounting structure 3 is mounted to the frame of the vehicle. A leather cup 8 is arranged below the runner component 6. The upper liquid chamber 4 is provided between the rubber main spring 1 and the flow path member 6. The lower liquid chamber 5 is arranged between the flow channel assembly 6 and the cup 8. The middle part of the runner component 6 is provided with a circular groove 63, and the decoupling film 7 is arranged in the circular groove 63. The lower part of the rubber main spring 1 is in a bell-shaped hollow structure. The runner assembly 6, the decoupling film 7 and the leather cup 8 are arranged in a bell-shaped hollow structure at the lower part of the rubber main spring 1. The middle part of the leather cup 8 is provided with an upward convex spherical surface, and a gap is arranged between the lower surface of the leather cup 8 and the lower runner plate 65. This space for filling with liquid is the lower liquid chamber 5.

In one particular embodiment, the first and

second flow channels

61, 62 are arranged side-by-side within the flow channel assembly 6 to enable longer first and

second flow channels

61, 62 to be provided within the area-restricted flow channel assembly 6 to increase the overall length of the flow channel.

In another particular embodiment, the first and

second flow passages

61, 62 are arranged in a planar spiral within the flow passage assembly 6 to enable longer first and

second flow passages

61, 62 to be provided within the flow passage assembly 6 of limited area to increase the overall length of the flow passage.

The flow channel assembly 6 may be a unitary structure or a combination of multiple components. In one particular embodiment, the flow channel assembly 6 includes an upper flow channel plate 64 and a lower flow channel plate 65. The lower surface of the upper flow field plate 64 is attached to the upper surface of the lower flow field plate 65, and the first flow field 61 and the second flow field 62 are provided between the upper flow field plate 64 and the lower flow field plate 65. Alternatively, the upper and lower

flow field plates

64, 65 may be plastic parts that are press-fitted by snap-fitting, and the upper and lower

flow field plates

64, 65 may be sealed by snap-fitting. The structure has the advantages of simple structure, easy realization of process, good liquid sealing performance and difficult seepage. The decoupling membrane 7 is cylindrical. The upper end of the decoupling film 7 is attached to the lower surface of the upper runner plate 64, and the lower end of the decoupling film 7 is attached to the upper surface of the lower runner plate 65, so that the decoupling film 7 can move freely between the upper runner plate 64 and the lower runner plate 65, and when the decoupling film 7 reaches a limit position, the decoupling film does not move any more, and liquid is prevented from flowing to the lower chamber.

The utility model provides a pair of hydraulic suspension compares with traditional runner, increases a runner again on original runner, can call as "double flow way". Due to the adoption of the double-flow-channel structure, the flow channel is longer than the traditional flow channel, and when the hydraulic suspension is excited by low frequency and large amplitude, liquid flows back and forth in the upper cavity and the lower cavity through the double flow channels. When the liquid flows through the double flow passages, the moving mass body formed by the liquid in the double flow passages is large, the contact area of the liquid and the surface of the flow passages is large, the moving mass body generates large on-way energy loss and friction loss in the moving process, and meanwhile, local energy loss is generated at the inlet and the outlet of the double flow passages to overcome the large moving mass body. The double-flow-channel hydraulic suspension has better damping effect than the single-flow-channel hydraulic suspension, so that the vibration energy is dissipated more quickly, and the purpose of greatly attenuating the vibration is achieved.

The utility model provides a pair of hydraulic suspension, under the loaded state, hydraulic suspension's last liquid chamber reduces because of the pressurized volume, and some liquid will flow into down the liquid chamber through two runners to tend to balance. When waiting to receive the excitation of the big amplitude external force of low frequency, the liquid of upper and lower liquid chamber flows through the runner, because the setting of double flow way for the runner increases, and the liquid mass in the runner increases, thereby the liquid mass of motion increases, the inertia force increase of production, along journey energy loss also increases, so has better damping characteristic, comes faster dissipation vibration energy, makes it can promote big damping and high dynamic stiffness performance when hydraulic suspension low frequency.

Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described in detail herein, many other variations and modifications can be made, consistent with the principles of the invention, which are directly determined or derived from the disclosure herein, without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and interpreted to cover all such other variations or modifications.

Claims

1. A hydraulic suspension comprises a rubber main spring, a first mounting structure, a second mounting structure, an upper liquid chamber and a lower liquid chamber, wherein the first mounting structure and the second mounting structure are connected with the rubber main spring, a flow channel assembly and a decoupling film are arranged between the upper liquid chamber and the lower liquid chamber, and liquid is filled in the upper liquid chamber and the lower liquid chamber.

2. The hydraulic mount of claim 1, wherein the first and second flow passages are disposed side-by-side within the flow passage assembly.

3. The hydraulic mount of claim 1 or 2, wherein the first and second flow passages are arranged in a planar spiral within the flow passage assembly.

4. The hydraulic mount of claim 1 or 2, wherein a circular groove is formed in the middle of the flow channel assembly, and the decoupling film is arranged in the circular groove.

5. The hydraulic mount of claim 4, wherein the flow channel assembly comprises an upper flow channel plate and a lower flow channel plate, wherein a lower surface of the upper flow channel plate and an upper surface of the lower flow channel plate are attached, and the first flow channel and the second flow channel are arranged between the upper flow channel plate and the lower flow channel plate.

6. The hydraulic mount of claim 5, wherein the upper and lower flow field plates are plastic parts press fit by snap fit.

7. The hydraulic mount of claim 5, wherein the decoupling membrane is cylindrical, an upper end of the decoupling membrane abuts a lower surface of the upper flow field plate, and a lower end of the decoupling membrane abuts an upper surface of the lower flow field plate.

8. The hydraulic mount of claim 5, wherein a leather cup is arranged below the flow passage assembly, the upper fluid chamber is arranged between the rubber main spring and the flow passage assembly, and the lower fluid chamber is arranged between the flow passage assembly and the leather cup.

9. The hydraulic mount of claim 8, wherein the first mounting structure is disposed on an upper portion of the rubber main spring, the second mounting structure is disposed on a lower peripheral side of the rubber main spring, the lower portion of the rubber main spring is a bell-shaped hollow structure, and the flow passage assembly, the decoupling membrane, and the cup are disposed within the bell-shaped hollow structure of the lower portion of the rubber main spring.

10. The hydraulic mount of claim 8, wherein the cup has an upwardly convex spherical surface in the middle and a gap is provided between the lower surface of the cup and the lower runner plate.