SU1694881A1 - Percussive device - Google Patents

Abstract

The invention relates to the mining industry, allows to simplify the design and increase the reliability of the device by eliminating wear of the striker (B) during braking. In the cavity of the housing 1 there is a collar B with a shoulder 3 and a stem 2, which forms a brake chamber (TC) 5 with the housing 1. On the rod 2, the conical elastic washer 11 is mounted with contact with the end of the collar 3 on the side of TC 5. 11 The washer 11 is made with axial holes 12 located in the zone of its contact with the end of the collar 3. The mechanism of the striker 6 of the firing pin has a gripping device. When making work stroke B, the collet 3 enters the TC 5 and the elastic washer 11 presses against the end of the collar 3. The holes 12 overlap and the kinematic energy B is absorbed by gas compressionin TC 5 and partial throttling through the washer 11 When cocked B, the washer 11 is deformed due to friction against the walls of TC 5 and lags behind the collar 3 The gas freely flows through the holes 12 from the working chamber 4 to TC 5, without interfering with the movement of B. 1 or

Description

The invention relates to the mining industry and can be used to create impact devices for the destruction of rocks.

The purpose of the invention is to simplify the design and increase the reliability of the device by eliminating the wear of the striker when braking.

The drawing shows a structural diagram of the device.

The percussion device consists of a housing 1, in the cavity of which there is a firing pin having a rod 2 and a shoulder 31 and forming with the housing 1 and a working 4 and brake chamber 5 and a charging mechanism 5 made in the form of a hydraulic cylinder, the rod 7 of which is associated with a gripping device , made in the form of a piston 8 capture with valve 9 and the stop 10.

On the rod 2, the strikers are installed with the possibility of contact with the end of the collar 3 on the side of the brake chamber 5 conical elastic washer 11, made with axial holes 12 located in the contact zone of the washer 11 with the end of the collar 3. The working cavity 4 is filled with gas under pressure.

The device works as follows.

From the initial upper position, the rod 7c is lowered by a gripping device - and enters the cavity of the collar 3, the gas is forced out of it. When the rod 7 is raised, the striker is drawn into the working chamber 4 by discharging into

ABOUT

Yu

00 00

collar cavities 3. In the upper position, valve 9 opens, and the firing pin is accelerated by gas in chamber 4 and makes a working stroke.

Then the cycle is repeated. In the absence of an obstacle, the collar 3 enters the brake chamber 5, the elastic washer 11 presses against the end of the collar 3, the holes 12 are blocked and the kinematic energy of the striker is absorbed by compressing the gas in the brake chamber 5 and partially throttling through the conical elastic washer 11. When the striker is lifted upward during cocking, the elastic washer 11 is deformed due to friction against the walls of the brake chamber 5, lags behind the shoulder 3, and the gas freely flows through the holes 12 from chamber 5 into chamber 4, not preventing the striker from moving.

Claims (1)

Invention Formula A percussion device comprising a housing, in the cavity of which there is a firing pin having a collar and a stem and forming a brake chamber with the housing, and a platoon mechanism with a gripping device, characterized in that, in order to simplify the design and increase reliability by eliminating striking wear The device is equipped with a conical elastic washer mounted on the striker rod with the possibility of contact with the end of the collar from the side the brake chamber, wherein the washer is made with axial holes located in the zone of contact of the washer with the end of the collar.