GB277621A - Improvement in mining machines - Google Patents

Abstract

277,621. Sullivan Machinery Co., (Assignees of Holmes, M. P.). Sept. 20, 1926, [Convention date]. Clutches. claw ; operating or controlling clutches.-The feeding means of a coal-cutting machine are driven from the motor through driving connections including worms rotatable on transverse horizontal axes, and worm gears meshing therewith. The machine comprises a reversible electric motor with a shaft 13, Fig. 3, which, through spur gearing 53, 54, 58 and bevel gearing 62, 63, drives a transverse horizontal shaft 65 carrying a worm 85 and driving, through gearing 67, 76, Fig. 5 a parallel shaft 78 carrying a worm 86; the worm shafts may be driven at different speeds and the worms 85, 86 may be of different pitch and have like or opposite threads. The worms 85, 86 engage co-axial worm gears 87, 88, Fig. 3, each containing a disc clutch 106 through which the gear drives a plate 101 or 102 internally toothed to engage and drive an elongated pinion 92 on a shaft 91; the gear 92 drives a spur gear 93 which may be connected through a clutch to a shaft 94 carrying either a sprocket 98, Fig. 3, engaging an anchored feed chain or a pinion 150, Fig. 11, engaging an internal gear 151 in a drum 152 hauling on an anchored rope. The sprocket and chain, or the rope and drum, may also be used for slewing the cutter jib. The disc clutches in the worm gears 87, 88 are alternately operated by a shipper 99 with its outer end pivotally held between spring-pressed plates 111, 112, Fig. 7, so as to yield in case of overload on the clutches; the shipper 99 is actuated by a crank &c. 115 on a rod 116 with a handle 118. The clutch between the gear 93 and the sprocket &c. shaft 94 comprises clutch teeth 120 on the shaft 94, and a ring 122 held in the gear 93 by an expansible split ring 123 and provided with teeth 121. engaging teeth 122a in the gear 93, the ring 122 being movable axially against springs 125 to bring the teeth 121 also into engagement with the teeth 120; the ring 122 is moved by means of a shipper ring 131 supported on a fixed ring 127 and rotated by toothed engagement at 133 with an axiallymovable rod 136, the ring 131 having pins engaging inclined slots in the fixed ring 127 and the pins also carrying rollers 132 engaging the clutch ring 122. Specifications 211,475 and 224,694, [both in Class 68 (i), Excavating earth &c.], are referred to.