SU1244296A1 - Device for joining drilling bit to submersible percussive mechanism - Google Patents

Description

The invention relates to mining, in particular to drilling equipment, and can be applied to connect a drill bit with an air hammer.

The aim of the invention is to increase the reliability of the device by reducing the possibility of wedging of rolling bodies.

FIG. 1 shows a device, a longitudinal section; in fig. 2 is a sectional view in FIG. one.

The drill crown 1 is inserted with its shank 2 into the axle box 3 of the percussion mechanism case 4 and through the striker 5 it receives blows. At the same time, rotation is transmitted from the engine of the machine through rods (not shown) to the crown 1. The crown 1 in box 3 is fixed by rolling bodies 6 and 7, which are located in ring grooves 8 and 9 of box 3 and in working 10 slots of shank 2 crowns 1, which fall through transporting 11 and connecting 12 grooves. For fixing and correct installation of the bodies 6 and 7 of the rolling in the grooves 8 and 9 of the axlebox 3, split segments 13-16 with holes 17 are provided.

The device is equipped with an elastic element 18, intended for the case of transporting the impact mechanism 4 assembled with the crown 1. Mortgage elements 19 are designed to lock the rolling bodies 6 and 7 in the grooves 8 and 9 of the axle box 3 during operation. The central channel 20 serves to feed the working agent to the bottom of the chest.

The installation and operation of the device is as follows.

Mounting elements 19 are inserted into the additional grooves of the axle box 3, the rolling bodies 6 and 7 are placed in the annular grooves 8 and 9, made in the axle box 3, and they are placed on segments 13-16, the larger and smaller segments in the assembly, fix them in the holes x 17. Since the breakdown of the holes 17 of the segments 13-16 corresponds to the location of the transporting grooves 11 of the shank 2 of the crown 1, then, having previously inserted the elastic element 18, the first rolling body 7 and then the body 6 are rolled into the transporting grooves 11 of the shank 2 of the crown 1 and bring it all the way to the bucks 3, s pressing the elastic element 18. Then turn the crown 1 in the direction of rotation of the rods (not shown), with the bodies 6 and 7 rolling through the connecting 12 slots fall into the working grooves 10, in which in the process of the pneumatic impactor they make reciprocating movements and transmit rotation. When raising the rods from the bottom of the chest or in the case of transportation of the hammer assembly assembled with the crown 1, the elastic element 18 displaces rolling bodies 6 and 7 from connecting 12 notch to the end of the working groove 10, which ensures reliable fixation of the crown 1 from falling out.

Disassembly is carried out in the reverse order.

/five

G5

Yes

Claims (2)

1. DEVICE FOR CONNECTING A DRILL BIT WITH A SUBMERSIBLE SHOCK MECHANISM, containing rolling elements located between the shaft end of the crown and the axle box of the mechanism body having longitudinal channels on the inner surface, fixing elements holding the rolling elements from falling out, and embedded elements, characterized in that , in order to increase the reliability of its operation by reducing the possibility of jamming of the rolling elements, annular grooves are made on the inner surface of the axle box to accommodate the rolling elements, the fixing elements are made us as a slotted sleeve consisting of individual segments with openings in the longitudinal channels installed fitting pieces, and between the end of the shank and a resilient member located axle box. 2. The device according to π. 1, characterized in that the diameter of the holes in the segments is 0.6-0.9 of the diameter of the rolling elements. s (l Yu C ©