CN201190758Y - Shear Thickening Liquid Shock Absorber - Google Patents

Abstract

The utility model relates to a shear thickening liquid shock absorber. The invention solves the problem that the vibration damping and recovery effects of the existing shock absorber using hydraulic oil are not ideal. The shock absorber includes a cylinder and a piston. The diameter of the piston is less than or equal to the inner diameter of the cylinder. There are more than one piston coaxially spaced on the piston rod; The cavity is the working cavity, and the cavity on the other side of the movable piston is the bottom cavity. The shear thickening liquid is provided in the working cavity, and the working gas is provided in the cylinder above the shear thickening liquid, or it may not exist. The bottom cavity Contains high pressure gas inside. The utility model adopts the shear thickening liquid to make the damping force produced by the shock absorber more in line with the requirements of shock resistance and vibration reduction; it has a wide application range and can be applied to various working conditions; due to the shear thickening liquid Due to the excellent shear thickening characteristics, the piston of the shock absorber does not have to match the cylinder body, which reduces the processing requirements of the piston and cylinder body, thereby reducing production costs.

Description

Shear Thickening Liquid Shock Absorber

technical field

The utility model relates to an anti-shock shock absorber utilizing shear thickening liquid.

Background technique

In engineering practice, such as vehicle engineering, aerospace, civil engineering, sports equipment, etc., shock absorbers play a very important role.

Shear thickening liquid is a kind of suspension, which is composed of dispersed phase and dispersion medium. When subjected to high strain rate load, the apparent viscosity of the contact interface changes greatly, even from liquid phase to solid phase; after the load is removed, It can also change from solid phase to liquid phase, and this change is reversible. The shear thickening liquid shock absorber uses the thickening rheological characteristics of the shear thickening liquid to provide anti-shock and vibration reduction force. Due to the reversibility of the shear thickening, it can be used repeatedly and can withstand multiple times continuously. shock absorber.

The current automobile shock absorber, such as patent CN 1079436A, etc., mainly uses hydraulic oil inside, and the hydraulic oil itself will not produce greater damping force due to impact, and its impact and vibration damping force is mainly given by the structure, vibration reduction and recovery The effect is not ideal enough, and the design of the piston is not flexible enough.

Utility model content

In order to solve the problem that the damping and recovery effects of the existing shock absorber using hydraulic oil are not ideal, the utility model provides a shear thickening liquid anti-shock shock absorber with strong restoring force and low manufacturing cost.

The specific structural design scheme is as follows:

The shear thickening liquid shock absorber includes a cylinder 7 and a piston 10, the piston 10 is located in the cylinder 7, and the piston rod 8 extends to the cylinder 7;

A movable piston 12 is arranged in the cylinder body 7 corresponding to the piston 10, and the cavity on one side corresponding to the movable piston 12 and the piston 10 is a working cavity 11, and the cavity on the other side of the movable piston 12 is a bottom cavity 14, and the working cavity 11 is provided with a There is a shear thickening liquid, and a high-pressure gas is arranged in the bottom chamber 14;

The piston rod 8 is coaxially provided with more than one piston 10 .

The end of the cylinder body 7 corresponding to the movable piston 12 is provided with a lower baffle plate 16 with a diameter greater than the diameter of the cylinder body. A spring 9 can be sleeved on the cylinder body.

More than one sealing ring 13 is sheathed on the movable piston 12 .

Two pistons 10 are coaxially arranged on the piston rod 8 .

The diameter of the piston 10 can be smaller than the inner diameter of the cylinder, and there can be a through hole in the axial direction.

A working gas 6 may be provided in the cylinder above the shear thickening liquid, and the working gas 6 is an inert gas or air.

The beneficial technical effects of the utility model are embodied in the following aspects:

1. Restoration force that is more in line with the needs of shock resistance and vibration reduction: the shear thickening characteristics of the shear thickening fluid make the damping force generated by the shock absorber more in line with the requirements of shock resistance and vibration reduction;

2. Wide range of application: by simply replacing the shear thickening fluid with different components, it can be applied to various working conditions.

3. Reduce production cost: Due to the shear thickening characteristics of the shear thickening liquid, the piston of the shock absorber does not need to match the cylinder body, which reduces the processing requirements of the piston and cylinder body, thereby reducing production costs.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described further by embodiment.

Example 1:

Referring to Fig. 1, the shear thickening liquid anti-shock absorber includes a cylinder 7 and a piston 10, the piston 10 is located in the cylinder 7, the diameter of the piston 10 is smaller than the inner diameter of the cylinder, and a plurality of pistons are coaxially arranged at intervals on the piston rod 8 10: The horizontal movement of the piston rod 8 is fixed by the guide rod 5 and the sealing ring 4, and the piston rod 8 extends to the cylinder body 7.

A movable piston 12 is housed in the cylinder 7 corresponding to the piston 10, and three sealing rings 13 are set on the movable piston 12 to prevent the upper part of the shear thickening liquid and the bottom chamber 14 of the lower part from leaking each other. The cavity on the side corresponding to the movable piston 12 and the piston 10 is the working cavity 11, and the cavity on the other side of the movable piston 12 is the bottom cavity 14. The working cavity 11 is provided with a shear thickening liquid, and a cylinder on the upper part of the shear thickening liquid A working gas 6 is provided in the body, and the working gas 6 is an inert gas or air, and a high-pressure gas is provided in the bottom cavity 14 .

The cylinder body 7 end corresponding to movable piston 12 is equipped with the lower baffle plate 16 that diameter is greater than cylinder body diameter, and the extended end of piston rod 8 is equipped with upper baffle plate 1, between upper baffle plate 1 and lower baffle plate 16. A spring 9 can be sleeved on the cylinder body to prevent the piston 10 from sinking when it is unloaded, and also can produce a certain damping effect.

A sealing ring can also be installed between the upper end cap 3 and the piston rod 8 . The upper sealing head 3 and the lower sealing head 15 are respectively fixedly connected with the upper sealing port 2 and the lower baffle plate 16 to make the structure more compact.

When the piston rod 8 of the shear thickening liquid shock absorber moves relatively, the shear thickening liquid is sheared by the piston 10, and the viscosity at the contact interface between the piston 10 and the shear thickening liquid increases rapidly, resulting in a huge The damping force resists the movement of the piston 10, thus playing the role of anti-shock and vibration reduction. Simultaneously, the movable piston 12 will also move up and down correspondingly, so that the gas in the bottom chamber 14 will be compressed or expanded to compensate and provide a certain damping force. The spring 9 will also bear a certain load at this time, playing an auxiliary role. When the relative movement of the piston 10 is more severe, the greater the damping force generated by the shear-thickening liquid, thereby achieving the effect of anti-shock and vibration reduction.

Example 2:

The difference with embodiment 1 is:

A piston 10 is installed on the piston rod 8, the diameter of the piston 10 is equal to the inner diameter of the cylinder, the piston 10 has a through hole in the axial direction, and no spring is set on the cylinder 7;

The shear thickening liquid fills the working cavity 11, and no working gas is added.

Others are with embodiment 1.

Claims (6)

1, opposition resistance damper for shear thickening liquid comprises cylinder body (7) and piston (10), and piston (10) is positioned at cylinder body (7), and piston rod (8) extends cylinder body (7), it is characterized in that:

Be provided with movable piston (12) in the cylinder body (7) corresponding with piston (10), movable piston (12) is active chamber (11) with the cavity of the corresponding side of piston (10), movable piston (12) opposite side cavity is chamber, the end (14), active chamber is provided with STF in (11), and chamber, the end is provided with pressurized gas in (14);

Described piston rod (8) is gone up the coaxial more than one piston (10) that is provided with.

2, opposition resistance damper for shear thickening liquid according to claim 1, it is characterized in that: cylinder body (7) end corresponding with movable piston (12) is provided with the lower pedal (16) of diameter greater than diameter of cylinder, the overhanging end of piston rod (8) is provided with overhead gage (1), can be arranged with spring (9) on the cylinder body between overhead gage (1) and the lower pedal (16).

3, opposition resistance damper for shear thickening liquid according to claim 1 is characterized in that: the seal ring (13) that is arranged with one or more on the described movable piston (12).

4, opposition resistance damper for shear thickening liquid according to claim 1 is characterized in that: described piston rod (8) is gone up coaxial spaced and is provided with two pistons (10).

5, opposition resistance damper for shear thickening liquid according to claim 1 is characterized in that: described piston (10) diameter can axially can have through hole less than cylinder diameter.

6, opposition resistance damper for shear thickening liquid according to claim 1 is characterized in that: can be provided with the described working gas of working gas (6) (6) in the cylinder body on described STF top is inert gas or air.

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