SU1257203A1 - Hydraulically actuated bit - Google Patents

Description

The invention relates to the mining industry and can be used in the structures of devices for the destruction of rocks by a shock-rotational method,

The purpose of the invention is to simplify the design of a hydraulic drill head.

The drawing schematically shows the proposed device.

The hydraulic drill head includes a working tool 1, a rotator consisting of body 2 ,, block 3 gears, gear shaft 4, hydraulic motor 5, and a percussion mechanism consisting of body 6, striker 7, support sleeve 8, distribution sleeve 9 and distribution element, made in the form of a spool sleeve 10, located. Concentrated striker 7 with the possibility of axial movement and contact of one of its ends with the end of the shaft-gear 4 and forming another with its end face. briskly 7, supporting 8 and distributing 9 bushings control chamber I1, permanently connected by radial channel 12 to pressure port 13. An idling chamber 14 is formed by an annular bore. The mechanism also has a drain channel 15 - Rotator motor and impact Editor S. Lisina

Compiled by E. Stolbtsov

Tehred L.Oleynik Proofreader E, Roshko

Order 4890 / 26Tirahk 470Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab, 4/5

Production and printing company, Uzhgorod, st. Project, 4

572032

Each node is supplied with separate power sources (not shown).

The hydraulic drill head works as follows.

5 When fluid is supplied to the hydraulic motor 5, the shaft-gear 4 with the working tool 1 is rotated. When the pressure channel is connected to the power supply of the impact mechanism, the liquid enters the control chamber 11. The pressure of the fluid in the chamber 11 creates a force acting on the end surface of the sleeve 10,. This force moves the sleeve.

15 to the left against the stop at the end of the pinion shaft 4 and frictional fastening is formed. With the help of the forces of rotation, the shaft-gear 4 rotation is transmitted to the sleeve 10, which periodically, connecting the idling chamber 14 with the pressure 13 or drain 15 channels, actuates the firing pin 7. The drilling head works in a rotational-impact mode,

25 When the drill head operates in the rotary mode, the percussion mechanism is disconnected from the power source. The force acting on the sleeve 10 from the camera side 11 of the control,

30 is reduced to zero, which prevents the transfer of rotation from the shaft gear 4 to the sleeve 10.

Claims (1)

HYDRAULIC DRILLING HEAD, including a rotator with a pinion shaft and a percussion mechanism having in the body of the hammer, distribution and support bushings, a distribution element, pressure and drain channels, characterized in that, in order to simplify the design, the distribution element is made in the form a sleeve located concentrically to the striker with the possibility of axial movement and contact of one of its ends with the end of the pinion shaft and forming the camera control phenomenon constant _Q but communicating with the flow channel. S 6 14 9 7 11 1257203 The 2nd unit is equipped with separate power supplies (not shown-). The hydraulic drill head operates as follows. 5 When the fluid is supplied to the hydraulic motor 5, the gear 4 is rotated with the working tool 1. When the pressure channel is connected to the power source of the impact mechanism, the fluid enters the control chamber 11. The fluid pressure in the chamber 11 creates a force acting on the end surface of the sleeve 10. With this force, the sleeve moves 15 to the left until it stops at the end of the pinion shaft 4 and frictional fastening is formed. Using friction forces, the rotation of the pinion shaft 4 is transmitted to the sleeve 10, which periodically connects the idle chamber 20 to the pressure 13 or drain 15 channels, drives the hammer 7. The drill head operates in rotational-shock mode. 25 When the drill head is in rotational mode, the percussion mechanism is disconnected from the power source. The force acting on the sleeve 10 from the side of the control chamber 11, 30 is reduced to zero, which eliminates the transmission of rotation from the pinion shaft 4 to the sleeve 10.