CN86102419B - Damping device - Google Patents

Abstract

The invention relates to a buffer apparatus, in particular to an oil pressure buffer apparatus which is able to obtain stable buffering feature. The tank filled with liquid is provided with a piston, thus forming a high pressure chamber and a low pressure chamber. Through the installation of a sealing part between eyelets on the piston and the air layer of the low pressure chamber, the flow of the buffering oil flowing out of the eyelet to the low pressure chamber becomes slow when buffering in a short time, therefore the buffer apparatus with stable buffering feature can be realized.

Description

Damping device

Even the present invention relevant makes piston action with short time interval, also can obtain the damping device of fixed damping characteristics.

Fig. 2 is the sectional drawing of the original damping device of expression, and 1 is the shell of store oil among the figure, and oil cylinder 2 is arranged on its a part of position.3 for making the piston of oil cylinder slip, which is provided with the aperture 4 in a certain size aperture.5 is the spring that piston 3 is returned, and 6 is oil, and 7 are lid, make it sealing with sealed member 8,9.10 is exactly the hyperbaric chamber that becomes high pressure when piston 3 actions, and 11 is low pressure chamber, and 12 is air layer.

Next action is explained.In Fig. 2, when apply external force make piston 3 towards illustrated left when being pressed into, the oil pressure in the hyperbaric chamber 10 just rise, thereby the cushion effect to external force has just taken place.At this moment, the oil 6 in the hyperbaric chamber 10 by aperture 4, goes out to low pressure chamber 11 1 effluents with very fast flow velocity, makes low pressure chamber 11, and the interior oil 6 and the air of air layer 12 obtain stirring, and thereafter, as shown in Figure 3, oil 6 settles out.In this state, when removing external force, piston 3 is under spring 5 effects, towards illustrated right-hand action.At this moment, the oil 6 in the low pressure chamber 11 flows into hyperbaric chambers 10 by aperture 4, however just after piston 3 is carried out racking, the occasion that piston is returned, the empty G﹠O 6 that is stirred is sneaked into hyperbaric chamber 10 together.

Damping device originally owing to constitute as described above, will make piston 3 return after action at short notice, and then air is sneaked in the hyperbaric chamber 10, even therefore there has been the action in the short time lag, can not obtain the problem of regular buffer attribute.

The objective of the invention is that problem as described above proposes in order to eliminate, even also can obtain the damping device of regular damping characteristics in the action in the short time lag for obtaining.

About damping device of the present invention is exactly between aperture on being located at piston and the air layer in the low pressure chamber curtain-shaped cover member to be set.

Damping device of the present invention is because the oil that flows out with high speed from aperture when piston action lowers thereby prevented the stirring of the oil and the air of low pressure chamber because of curtain-shaped cover member makes flow velocity.

With reference to the accompanying drawings, one embodiment of the invention are explained.Among Fig. 1,13 is curtain-shaped cover member, and it is arranged between the aperture 4 and air layer 12 on the piston 3, and other symbol 1 to 12 is the same with original structure.

In oil dashpot as constituted above, when piston 3 actions, to the oil 6 of low pressure chamber,,, in low pressure chamber 11, flow out with low speed from the gap between piston 3 and the curtain-shaped cover member in case when running into curtain-shaped cover member 13, flow velocity is lowered to flow out at a high speed from aperture 4.Therefore, the stirring of the air of oil 6 in the low pressure chamber 11 and air layer 12 not taking place, even after moving like that, piston 3 is returned, can prevent that air from sneaking in the hyperbaric chamber 10 yet.

As mentioned above, if according to the present invention, flow to the curtain-shaped cover member that the flow velocity of the oil of low pressure chamber reduces,, also can obtain the effect of the stable damping device of damping characteristics even obtained action with the short time lag by being provided with to make when the piston action from aperture.

Below accompanying drawing is done simple declaration.

Fig. 1 is the sectional drawing according to the damping device of one embodiment of the invention,

Fig. 2 is the sectional drawing of original damping device,

Fig. 3 is the action diagram of Fig. 2.

Among Fig. 1,2 is oil cylinder portion, and 3 is piston, and 4 is aperture, and 10 is the hyperbaric chamber, and 11 is low pressure chamber, and 13 is curtain-shaped cover member.

Claims (1)

1, disposing piston in the cylinder of filling fluid, form hyperbaric chamber and low pressure chamber, at described piston during towards the action of described hyperbaric chamber, the described fluid that makes described hyperbaric chamber on being provided in described piston fixed aperture flow to the damping device of described low pressure chamber, when it is characterized in that being provided with the curtain-shaped cover member of the liquid speed that mitigation flows out from described aperture, form fluid layer and gas blanket at above-mentioned low pressure chamber, and the axle direction of the separating surface of formation fluid layer and gas blanket and above-mentioned piston is parallel, in addition, above-mentioned aperture is configured to the axle direction of above-mentioned piston perpendicular.

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