SU1379441A1 - Automatic wing-closing device - Google Patents

Abstract

The invention relates to mechanical engineering and can be used for the automatic closing of cassettes, lux. The aim of the invention is to simplify the design. When the sash is closed by a fluid pressure, the elastic plate 9 presses against the blade 7, blocking the opening 8. As a result of liquid throttling through the opening 10 of smaller diameter in the plate 9, the stroke of the sash is replaceable) 1 et-s. In the process of rotating the blade 7, the moment of resistance of the device decreases due to an increase in the total area of the throttling hole 10 and the eccentric groove 1 I. This compensates for the reduction of the torque of the torsion spring, ensuring smooth closing of the sash. 2 Il.

Description

(L

77

with

from 4.

Wf.

The invention relates to mechanical engineering and can be used to automatically close sashes, hatches.

The purpose of the invention is to simplify the design.

Figure 1 presents the proposed device, a partial longitudinal section of a shock absorber; Fig. 2 shows an amortizer, a longitudinal section.

A device for automatically closing the flap 1 comprises a shaft 2 and a torsion spring 3 spanning the shaft for storing energy when opening the flap. Shaft 2 and spring 3 are rigidly connected to sash 1. At the free end of shaft 2, there is a regulating shock absorber filled with working medium, the housing 4 of which is mounted on shaft 2 by means of jumpers 5 with elastic pressing of sealing elements 6. The shock absorber piston at least two diametrically located blades 7, each of which has a throttling hole 8. Elastic plates 9 cantileverly fixed to the shaft 2 with the possibility of deflection under the action of the working medium when the sash I is opened and mated with the blades Stage 7 when closing the sash 1. Each of the plates has a throttling hole 10, coaxially with the hole 8 of the mouth of the mouth 7, but of a smaller diameter. An throttling eccentric groove I is made on the inner surface of the shock absorber housing 4, the cross-sectional area of which increases in the direction of rotation of the shaft 2 when the flap 1 closes.

The device works as follows.

When the sash 1 is opened, the torsion spring 3 is charged, accumulating energy and returning the sash 1 to the closed position. The shaft 2 rigidly connected with the flap rotates when the flap 1 opens and rotates the shock absorber blades 7, while under the influence of the working medium the elastic plates 9 are pressed from the blades 7, which ensures free flow of the working medium through the holes 8 of the blades 7 and the gaps between the plates 9 and the inner the surface of the housing 4 of the shock absorber.

After the sash 1 is released by the pressure of the working medium, the elastic plates 9 are pressed against the blade 7 and overlap the orifices 8. As a result of the throttling of the working medium through the orifices 10 of smaller diameter, the sash stroke slows down, while the sash movement decreases the resistance of the cross section eccentric groove 11, which compensates for the reduction of the torque of the torsion spring 3, thereby ensuring smooth closing of the sash 1 at almost constant speed.

The device has a simple construction and can be used to control a sash of both small and large sizes.

Forms in the invention

A device for automatically closing the flap, comprising a shaft and a spring enclosing the shaft for storing energy when opening the flap, having means for rigid connection with the flap, and a regulating shock absorber mounted on the free end of the shaft and including a piston connected to the shaft in a housing-filled cavity of the housing throttling valve, throttling groove made on the inner surface of the housing, and an elastic element, characterized in that, in order to simplify the design, The shock absorber is made in the form of at least two diametrically fixed blades on the shaft, the elastic element is made in the form of plates that cantileverly mounted on the shaft with the possibility of deflection under the action of the working medium when opening the sash and matching its plane with the plane of the blade when the sash is closed, the throttling valves are made in the form of coaxially different-sized holes, made on each blade, and elastic plates, the smaller of which are located on the plates, and the throttling groove is made in the form eccentric groove cross-sectional area which increases in the direction of shaft rotation when closing flaps.

1

Claims (1)

SUMMARY OF THE INVENTION A device for automatically closing a sash, comprising a shaft and a spring covering the shaft for storing energy when opening the sash, having means for rigidly connecting to the sash, and an adjustable shock absorber mounted on the free end of the shaft and including a cavity in the cavity filled with the working medium a piston connected to the shaft, a throttling valve, a throttling groove made on the inner surface of the housing, and an elastic element, characterized in that, in order to simplify design, the shock absorber piston is made in the form of at least two blades diametrically fixed on the shaft, the elastic element is made in the form of plates cantileverly mounted on the shaft with the possibility of deviation under the action of the working medium when opening the sash and pairing its plane with the plane of the blade when closing the sash, the throttling valves are made in the form of coaxial holes of different sizes made on each blade and elastic plates, the smaller of which are located on the plates, and the throttling groove made in the form of an eccentric groove, the cross-sectional area of which increases in the direction of rotation of the shaft when closing the sash.