US1585641A - Rotation and feed regulator - Google Patents

Description

May 25 1926..

L. C. BAYLES ET AL ROTATION AND FEED REGULATOR Filed Dec. 30, 1922 led Patented May 25, 192

LEWIS C. BAYLES AND FRED M. SLATER, OF EASTGN, FENIISYLVAITIA, ASSIGNORS T INGERSOLL-RAND COMPANY, (3F CITY, NEW JEE$EY, A CORPORA- TION OF NEW JERSEY.

ROTATION AND FEED REGULATOR.

Application filed December This invention relates to fluid actuated rock drills of the hammer type, but more particularly to a machine of this type having automatic rotation, as for instance, rifle 5 bar rotation for the drill steel, and a fluid actuated feeding, element for feeding the machine forward.

The objects of the invention are to enable the air feeding element to he controlled and permit light air feed tobe used on starting a hole, while at the same time permitting the rotation to be stopped altogether.

Another object of the invention is to enable the feeding and rotation controlling mechanism to be controlled by a hand rotated device, so that the machine may be used without the possibility of operation of the controlling mechanism when desired.

Further objects of the invention will hereinafter appear and to all of these ends the invention is shown in the accompanying drawings, in one of its preferred forms, in which- Figure 1 is a side elevation in longitudinal section of a stope drill, on the line 1-1 of Figure 2, looking in the direction of the arrows, and embodying; the invention,

Figure 2 is a horizontal sectional view on the line 22 of Figure 1 looking in the direction oi": the arrows with the parts in locked position,

Figure 8 is a View similar to Figure 2 with the parts released, and

Figure 4 is a horizontal sectional view of Figure 2 on the line 4+4 looking in the direction of the arrows.

Referring to the drawings, the machine comprises the cylinder A having a reciproeating; piston B adapted to impartblows of impact to the drill steel C, which extends into the front head D and rotating chuck E, in position to receive the blows of impact of the hammer piston. The piston is provided with a forward fluted extension E passing through the front cylinder washer F and engaging flutes G on the chuck 11 The rearward extension H of the piston enrages the usual rifle bar J provided with the usual ratchet and pawl mechanism for causing rotation. The rifle bar head K is provided with the spring pressed pawls Ii adapted to engage the ratchet ring O located in the back. cylinder extension P.

The head block Q carries the throttle valve R controlling the supply of motive fluid to the percussive element and to the air feeding element of the machine through the inlet S. Without describing the course and distribution of the motive fluid to the cylinder and piston, it will be sutiicient to state that as the piston reciprocates under the action of motive fluid, rotation will be imparted to the steel.

The air feed cylinder T is provided with the piston U having the piston rod V and a pivoted foot piece W at tie lower end of the piston rod is formed with the rock engaging points X. The cylinder T is in slidable but non-rotatable engagement with the pistonrod V, due to the projections Y on the cylinder engaging grooves Z in the piston rod. The percussive element and the air feeding; element of the machine are held together by the usual side rods a.

Motive fluid is constantly supplied to the air feed cylinder from the throttle B through the port Z) and a relief port 0 leads from the air feed. cylinder to the valve chamber (Z of the valve 6, which controls communication between the relief port 0 and the atmospheic vent f.

The ratchet ring 0 of the rotation mechanism is in this instance provided with a finger 5 adapted to bear upon the head h of the valve 6, and a spring 7' is shown compressed bct-ween the valve 0 and the cap is, in which cap vent 0 is placed. The spring j is of insutiicient strength to resist the tendency of the ratchet ring 0 to rotate when the machine is running, so that when the valve c is released and permitted to move in the valve chamber 6!, the rotation for the machine becomes slip rotation, or else the rotation is stopped altogether, and the piston .li merely reciprocates without rotating, due to the fact that the ratchet ring 0 is not held tightly in the head block P.

A stop, in the form of a pin 22, is mounted at the side of the valve e and provided with a spring q adapted to be compressed between the collar 1 on the stop pin and the plug .9 surrounding; the stem of the pin. The pin p is provided with a projection 2? which is adapted to slide in the slot 24 in the cap or plug a so that the stop pin, which controlled by the handle or finger piece '2) may be moved inwardly into the path of the relief valve 0 beneath the head it as indicated in Figure 2, in order to lock the valve from movement or else the stop pin p may be withdrawn and rotated to permitthe projection t to lie upon element to operate as required without rotating the drill steel and with light air feed in the air teed cylinder. If strong rotation is permitted, under such circumstances, difficulty is experienced in collaring the hole. pulling out the stop pin 29 to the position indicated in Figure 3, the

abutment afforded by the head h of the relief valve 0 against the linger vg of the ratchet ring 0 is released, and the ratchet ring '0 is free to move back and forth as the piston B reciprocates, so that the rot-ation is not imparted to the drill steel. At

the same time, the vent in the air teed cylinder is open through the passage 0 and atmospheric vent f, or is opened and closed intermittently as the finger g of the ratchet ring 0 presses the relief valve back and forth under the influence of the spring 7', In order to again apply the "full force of the air feed and restore the full rotation, the

stop pin 39 is again moved inwardly to catch under the head 7a of the relief valve 0 to lock the valve from movement, as indiated in Figure 2.

e claim:

In a fluid actuated rock drill of the hammer type, the combination 0t rifle bar rotation "for the drill steel having a releasable ratchet ring adapted to be moved by resistance to rotation when released, means for feeding the machine forward, said means being fluid, a stop on the ratchet ring, a valve controlling the feeding means mounted ad- "acent the ratchet rin and ada )ted to be t3 actuated by said step, a spring tending to force said valve to closed position insuilicient strength to resist rotation oi the ratchet ring, a spring pressed valre stop to positively engage the valve for normally holding the valve and the ratchet ring immovable, ad a finger piece on the stop whereby d stop may be withdrawn to release the valve and the ratchet ring for permitting tree oscillation of the ratchet ring and reciprocation ot the valve and to permit a portion of pressure fluid to be intermittently released from the feeding means by the valve.

FRED M. SLAYER.

constantly exposed to pressure

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