CS216064B1 - Double-sided hydraulic shock absorber - Google Patents

Abstract

A double-sided hydraulic damper, especially for the end-of-travel speed of the wings of sliding automatic cabin doors, single-sided and double-sided, for elevators equipped with a drive with a motor whose rotation speed cannot be easily controlled, consisting of a lever with a pulley, a damping cylinder filled with liquid and provided with a flow channel with a regulating screw and a lower pin, a piston equipped with a check valve and a piston rod, a spring returning the lever to the vertical position, an upper pin, two middle pins, a yoke, which is the supporting part of the entire damper, characterized in that the yoke (1) is rotatably connected by its lower part to the damping cylinder (2j in its lower part and the upper end of the piston rod (3) is rotatably attached by an upper pin (9) in the upper part of the lever (7) equipped in the lower part with a pulley (10), which is connected to the third in its upper part by middle pins (8) rotated so that the radius of rotation of the upper pin (9) around the middle pins (8) is smaller than the radius of rotation of the upper pin (9) around the lower pin (6).

Description

The invention solves a double-sided hydraulic damper, in particular the sliding range of sliding automatic cabin door wings, one-sided and two-sided to elevators equipped with a motor with a rotational speed which cannot be easily controlled (eg asynchronous servomotor). silencer.

The hitherto known design of the hydraulic door leaf stopper consists of a cast damping cylinder in which a shortened crank mechanism is mounted on the rolling bearings, driven by a lever located outside the damping cylinder. In the rest position of the lever, the handle of this mechanism is straddled from the dead position, so that when the lever comes to a stop, the damper exerts full effect on the door leaf, the initial delay of which is therefore large and accompanied by impact. After initial braking, the wing velocity is no longer reduced in the entire stop zone, so that the door leaf stops in its extreme position again by impact. In addition to this drawback, this hydraulic damper operates only in one direction, so two dampers are required to slow and stop the door leaves in the extreme positions. This damper is technologically demanding and functionally unreliable.

The above-mentioned drawbacks are eliminated by the double-sided hydraulic damper according to the invention, which is based on a lever transmission consisting of a lever, a damping cylinder with a piston rod and a piston with a non-return valve and a caliper. The parts are pivotally connected by pins. While turning the lever around the center pins, the upper pin moves along a circle with a radius r. At the same time, the upper pin moves the damping cylinder and the piston rod mounted rotatably around the lower pin. Since the radius of rotation r is smaller than the initial radius of rotation R, the piston, whose cone is forced to move along a circle with the radius r, must be pushed into the roll and forced through the flow cavity provided with the adjusting screw. This achieves a progressive damping effect. As can be seen from the partial positions of the mechanism, the piston retraction speed and thus the damping effect of the double-sided hydraulic damper is greater the more the lever is deflected from the vertical position.

The construction of the shock absorber, which is symmetrical according to the longitudinal ace so achieves double-sided damping and one damper is sufficient for the courtyard function. Progressive attenuation of the courtyard wing movements in extreme positions is advantageous from two points of view. First, the initial damping phase is gradual, boz impact. Secondly, the final landing range of the wings is lower than the current concept.

The attached drawing shows the described double-sided hydraulic damper including several positions of its mechanism.

In the lower part of the yoke X, which bears the support part of the double-sided hydraulic damper, on the lower pin 6 is rotatably mounted a damping roll whose lid passes through a piston 2 carrying a piston 6 with a non-return flap 2. wherein the lever X is connected in the upper part of the upper shaft 2 to the piston rod 2, and at its lower end, the lever X carries a pulley 10 which, when the damper operates, strikes the stops

11. The oil pushed out by the piston 6 flows through the channel around the adjusting screw 12. The spring 13 returns the lever 13 to the vertical position.

The double-sided hydraulic shock absorber can also be used in other cases where it requires damping (absorption) of kinetic energy moving with the components.

23.6 064

Claims (1)

SUBJECT OF THE INVENTION Double-sided hydraulic shock absorber, in particular the sliding range of sliding self-contained cab doors, one-sided and two-sided, for lifts equipped with an engine-driven drive whose rotation speed is not easy to control, consisting of a lever and pulley. from a piston fitted with a non-return valve and a piston rod, * springs returning the lever to the perpendicular position, from a game pin, from two middle pins, from a yoke which is a part of the whole damper. the lower pin (6) of the β damping cylinder (2) in its lower part and the upper end of the piston rod (3) is rotatably mounted by the upper pin (9) in the upper bar of the lever (7) (1) connected in its upper part by means of central pins (8), so that the radius rotates the game pin (9) around the center pins (8) is less than the radius of rotation of the upper pin (9) around the lower pin (6).