SU759776A1 - Pneumatic flexible element mainly for transport vehicle suspension - Google Patents

Description

The invention relates to the transport industry and relates to under-, vehicle weights.

The pneumatic elastic vehicle suspension element is known, which contains a rubber-cord shell with a lid, forming the main cavity, attached through a partition to the rubber-cord shell punch with additional cavity, an elastic valve in the form of a disk covering the hole, which communicates between the main and additional cavities £ ΐ].

The closest to the invention to the technical essence 'and the achieved result is a pneumatic elastic suspension element of vehicles containing rubber-shell, supporting base plate and forming the main cavity, hollow punch, placed between the latter and rubber-shell. the septum with a central hole, a glass attached to it with an additional cavity connected to the punch cavity by holes made in the wall of the glass, and from the main hole through the central hole of the partition, damping device, interactions2

with wall and partition openings, and a compression stroke limiter mounted on the partition wall in the chord shell (2).

A disadvantage of the known 'elements is the low damping capacity, since the energy of the compressed gas of the punch cavity is used during rebound.

The purpose of the invention is to increase the damping ability.

This goal is achieved by the fact that the damping device is designed as a spring-loaded in the direction ^

15 to the partition of the floating piston with a central opening coaxially with the central opening of the kerebor, in which a valve is installed, designed to connect the main and additional cavities.

FIG. 1 shows a pneumatic elastic element, longitudinal section? in fig. 2 - damping device, 25 longitudinal section; in fig. 3 is a section A-A in FIG. 2; in fig. 4 is a section BB in FIG. 2

The pneumatic elastic element (see; figs. 1 and 2) contains a rubber casing sheath 1 carrying support

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plate 2 and the core cavity forming 3, a hollow punch 4, a partition 5 with a central hole 6, a cup 7 attached to the partition with an additional cavity 8, in the side wall of which there are holes 9, a damping device made in the form of a floating piston 10 pressed to the partition springs 11, ·. put on guides 12, and valve 13, (mounted in the central hole of the piston, coaxial with the central opening of the partition and intended for communication of cavities 3 and 8), and limiter 14 of the compression stroke mounted on the partition in the cavity 3.

The valve 13 is made in the form of a retaining ring 15, an additional floating piston

spring 18 installed between the ring 15 and the piston 16, the plate 19 and the governing limiter 20.

Works pneumatic elastic element as follows.

When the static position of the pressure in the cavities 3 and b and the cavity of the punch 4 is the same. During compression, the pressure in cavity 3 increases sharply d, when the pressure difference in the meanness, 3 and the cavity of poins'Na 4 exceeds the back pressure on the piston 10,

created by the springs 11, the piston 10 'is displaced and opens the holes 9, indicating the cavity 3 and the cavity of the punch / after which in the latter the pressure increases synchronously with the increase in pressure in the cavity 3.

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the pressure drop in the cavity of the punch through the gaps between the glass 7 and the piston 10 is insignificant, the energy of the compressed gas contained in the cavity of the punch does not participate in the course of the rebound.

During subsequent compression, as / only the pressure difference in cavities 3 and 8 exceeds the counter-pressure on the piston 10 created by the springs 11, the piston 10 lowers (the force of the springs is adjusted so that it occurs at the very beginning of the compression stroke), opens holes 9, compressed gas from the cavity of the punch, the pressure of which is higher than the pressure of the compressed gas in the cavity 3, enters the latter, counteracting the compression course and dampens vibrations.

The effectiveness of the described device lies in the fact that during the period of rebound, the energy of the compressed gas of the cavity of the punch does not participate in the course of the rebound, and in the period of subsequent compression moves (with oscillations of the suspension) counteracts them.

When the pressure difference between cavities 3 and '8 exceeds the counter-pressure of the piston 16, db'zdali spring ’.. breaks down 16 and informs the cavity 3 and 8, after which the pressure in the latter increases simultaneously pressure in the cavity 3.

By the end of the compression stroke, the pressure in the cavity of the punch 4 and the cavity 8 becomes less than the pressure in cavity 3 by the amount of pressure created by the forces of the springs 11 and 18. During the rebound process, the pressure in cavity 3 decreases and when the pressure difference in cavities 3 and 8 becomes equal to the counterpressure, created by the spring. 18 on the piston 16, the valve 13 is closed; and when this difference becomes equal to the counter-pressure on the piston 10 created by the springs 11, the piston 10 rises and closes the orifices 9. When the pressure in cavity 3 decreases below the pressure in cavity 8, plate 19 opens and the pressure in cavities 3 and 'decreases further 8 happens synchronously

Thus, at the beginning of the rebound stroke, the holes 9 are blocked by the piston 10, and

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Claims (1)

Claim 'Pneumatic elastic element mainly suspension vehicle, containing rubber-cord shell, bearing base plate and forming the main cavity, a hollow punch, placed between the latter and the rubber-cord shell partition with a central hole, attached to it a glass with an additional cavity connected to the cavity of the punch through holes made in) the wall of the glass, and from the main - through the central opening of the partition, a damping device that interacts with the opening E walls and partitions, and a limiter compression stroke, mounted on a partition in reeinokordnoy shell, characterized in that, in order to enhance the damping ability, damping device embodied as a spring-loaded toward the partition _floating: piston coaxially disposed with the central hole septum central opening In which the valve is installed, designed to connect the primary and secondary cavities.