A pneumatic shock absorber

IPC classes for russian patent A pneumatic shock absorber (RU 2079747):

F16F5 - Liquid springs in which the liquid works as a spring by compression, e.g. combined with throttling action; Combinations of devices including liquid springs

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(57) Abstract:

Use: protection of objects from percussive effects. The inventive pneumatic shock absorber includes a housing, a main rod and the piston, coaxially mounted in the housing cylinder, placed in it a hollow rod with piston and placed in the cavity for more on the piston. Partition with apertures mounted on one end of the cylinder is sealed relative to the housing. In the holes of the partitions mounted valves. On the facing surfaces of the cylinder and the hollow rod made stops to interact with each other. The main stem of the piston placed in the cylinder with the formation of the hydraulic cavity and the cavity is communicated with the atmosphere. The main piston is mounted for engagement with a hollow and additional rods. 1 Il.

The invention relates to the field of protection of objects: cars, appliances, equipment, etc., allowing a limited degree of bilateral mechanical loads from intensive adenovirally impacts arising from the operation of the mechanisms, explosive devices, seismic vibrations, etc.

Known gidroaerotsentr containing short the output valves [1]
The disadvantage of this shock absorber is the impossibility of establishing different dynamic efforts to stem when working in compression and tension, due to the work of one of the working valve on the efforts of the two directions.

Known pneumatic shock absorber, comprising a housing, a main rod and the piston, coaxially mounted in the housing cylinder placed in the last hollow piston rod and the piston and placed in its cavity an additional rod and piston [2]
In relation to declared this shock absorber is the closest to the technical essence and the achieved result.

The disadvantage of this shock absorber is the inability to use it to work in the stretch mode.

Another disadvantage is the presence of only one-way damping. All this reduces its performance and limits the application.

In the proposed absorber eliminates this disadvantage.

This is achieved by a pneumatic shock absorber, comprising a housing, a main rod and the piston, coaxially mounted in the housing cylinder placed in the last hollow rod with piston and placed in his Palast siteline housing wall with holes and installed valves, on the inner surface of the cylinder and on the outer surface of the hollow rod made stops to interact with each other, and the main stem and piston placed in the cylinder with the formation of the hydraulic cavity and the cavity is communicated with the atmosphere, and installed in series a hollow piston rod with the piston and the main piston is mounted for engagement with a hollow and additional rods.

In Fig. 1 shows a General view of the proposed pneumatic-hydraulic shock absorber. It includes a housing 1, the valves 2 and 3, wall 4, a cylinder 5 with an internal stop 6, the main shaft 7 with the piston 8 and the axial hole 9, the hollow rod 10 with the stop 11, the additional rod 12, B podpornega hydraulic cavity, the cavity is communicated with the atmosphere, G gas cavity, D is the hydraulic cavity formed by the partition 4 and the hollow shaft 10.

As the elastic element applies a compressed gas.

In the initial position under the action of pressure of the compressed gas in the cavity "d" of the hollow rod 10 is held from displacement by the lugs 6 and 11, and in the cavity "B" together with placed additional rod 12, cooperating with the piston 8 of the main shaft 7, keeping it from moving torque setting is.

The shock absorber works as follows.

Under the action of dynamic loads on depreciable object core rod 7 is moved into the internal cavity of the housing 1 of the shock absorber, overcoming the torque of the hollow shaft 10 and the additional shaft 12 by moving them to the side walls 4 and displacing of the cavity D in the cavity g of the slurry through the valve 2; at the same time, slurry, which is in the cavity G, under the pressure of the compressed gas flows through valve 3 into the cavity B.

When the inverse dynamic moving depreciable object core rod 7, the piston 8 extends from the housing 1, thereby displacing from the cavity B in the cavity g of the slurry through the valve 3; at the same time, slurry, which is in the cavity G, under the pressure of the compressed gas flows through the valve 2 into the cavity D, thereby moving the rods 10 and 12, after the stop 11 of the hollow rod 10 will interact with the stop 6 of the cylinder 5 and the piston rod 10 will stop further movement of the rod 7 will track additional rod 12, thereby ensuring the continuity of the power connection rod of the shock absorber.

Subsequent compression of the shock absorber piston rod 7 will move additional rod 12 in side the m way is two-way attenuation with different efforts in the directions of movement of the rod, the damping of the amplitude of movement of the rod 7 with the piston 8, the decrease in the extent of its progress and reduce the time it returns to its original position.

In the result, the problem of two-way damping in the absorber stretching, active contraction periods of the amplitude of the movements of depreciable object and the exclusion of unauthorized detachment from the floor of the equipment placed on depreciable object or in other cases due to the introduction on the different dynamic absorber damping during compression and extension of the shock absorber rod, which improves performance and extends the range of applications for the shock absorber.

A pneumatic shock absorber, comprising a housing, a main rod and the piston, coaxially mounted in the housing cylinder placed in the last hollow rod with piston and placed in its cavity an additional rod and the piston, characterized in that it has fixed on one end of the cylinder and hermetically installed relative to the housing wall with holes and installed valves, internal p is and the main stem and piston placed in the cylinder with the formation of the hydraulic cavity and the cavity, communicated with the atmosphere, and installed in series a hollow piston rod with the piston and the main piston is mounted for engagement with a hollow and additional rods.