SU1392276A1 - Hydraulic telescopic shock-absorber - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to devices for damping vibrations. The purpose of the invention is to reduce metal consumption by reducing the valve weight of the valve. The shut-off element of the valve is withdrawn in the form of a three-pointed sprocket with an extrusion at one of the ends and is made by stamping. 4 il.

Description

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1 The invention relates to machine building, in particular to vibration suppression devices.

The purpose of the invention is to reduce the metal consumption by reducing the weight of the valve.

FIG. 1 shows a hydraulic telescopic shock absorber, a general view with a partial longitudinal section: .Q in FIG. 2 - a shock absorber piston, a section along the section; in fig. 3 - valve shut-off element with spherical extrusion, top view; in fig. 4 shows an exemplary embodiment of a locking element with a valve with a cylindrical opening, axonometrics.

The hydraulic telescopic shock absorber contains a reservoir 1 with a liquid in which a cylinder 2 is located with a piston 3 placed in it with a rod 4. In the piston 3 there are three holes 5 forming channels for the passage of fluid from the rod cavity into the piston one, which have 25 conical extensions Sections 6, which are closed by shut-off valve 7, which is located on the seats 8, are made in the form of cylindrical protrusions. The locking element 7 is a three-terminal star, made of sheet material, at one end of which an extrusion 9 is made, is located in one of the holes 5. This extrusion 9 can have a cup-shaped, for example, spherI: ... .

chesky form (fig. 3) or cylindrical (fig. 4). The clamp 9 fixes the end of the sprocket relative to the seat 8 and, because it does not allow the locking element 7 to rotate around the axis of the rod 4, it simultaneously fixes the two other ends of the sprocket relative to their saddle 8. Fixing the locking element 7 from turning allows it to work safely with the saddles B. To these saddles B, the locking element 7 is pressed against the spring 10, abutting a nut 11 screwed on the rod 4. Simultaneously, Q temporarily the end 12 of the nut 11 is a stop to limit the movement of the locking element 7, preventing you from hopping the boot 9 out of the hole 5.

On the piston 3 there is also a re-inlet valve 13 that closes the openings 14, which serve to bypass the fluid from the piston cavity into the rod. Also in the saddle is 15 re

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The inlet valve 13 has a throttle groove 16 which constantly communicates the rod and the piston between itself: the main cavity damping gap.

At the end of cylinder 2 there is an insert with an inlet valve and a compression valve (not marked), which serve to bypass a part of the fluid from the piston cavity into the reservoir 1 during the operation of the shock absorber.

. Hydraulic telescopic shock absorber works as follows.

During compression, when the force 3 goes down towards the insert, part of the fluid from the piston cavity flows into the rod through the relief valve 13-, and the rest of the liquid is forced into the tank 1 through the pressure valve. During the withdrawal at high speed of the piston 3, the pressure above it increases so much that the locking element 7 moves away from the set B, and the liquid flows from the rod into the piston cavity through the selector valve.

At a very high speed of the piston 3 at the opening, when the pressure in the rod cavity of the shock absorber becomes too high, the locking element 7 rests on the end face 12 of the nut 1X and then under the action of the pressure of the liquid, the ends of the sprocket, which have a lobe farm, begin to bend.

As the saddles wear 8, i.e. as their height decreases, the inner diameters of the circles of the contacts of the star petals with the saddles B, i.e. becoming smaller area i

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fluid pressure. During the intelligence (lowering the height of the saddles 8, the compression force of the spring 10 decreases. Therefore, when the valve seats are worn out, the pressure provided by the valve does not decrease, despite the decrease in tension on the spring 10 due to an increase in its working pressure and fatigue shrinkage. conical sections 6 holes 5 and widths of saddles B.

Claims (1)

Invention Formula Hydraulic telescopic shock absorber containing)) the tank. in which the cylinder is located, the piston with the openings and saddle surfaces is placed in the latter and, for contact with the latter, a shut-off element of the valve, which is rani and so that, in order to simplify 22764 neither the design nor the maintainability, the locking element in the plan has an L-shape with cup-shaped extrusions in the middle and at the ends, and the areas between the extrusions are arcuate or with corrugations. P Fiá.1 8.3 Yu eleven F (/. 1 Fy