GB318739A - Improvements in mechanism for power shovels and the like - Google Patents

Abstract

318,739. Marks, Sir G. C., (Universal Power Shovel Co.). Aug. 27, 1928. Endless-track vehicles.-In an excavator crane or the like with a carriage supported as on endless tracks, and carrying a table capable of rotating or swinging and on which a prime mover is mounted, controllable means are provided whereby the power means may drive said supporting means or cause rotary movement of the table simultaneously or separately. As shown, a carriage 10 is supported on endless tracks 14 passing over sprockets 13 and load-supporting rollers 15; the carriage carries a hollow shaft 23 about which is pivoted a table 20 supported on rollers 22. The table carries an internalcombustion or other motor 46 with transmission gear 48, one shaft 48<1> of the latter driving tableslueing gear while a further shaft 50 drives propelling gear; sluding and propelling may be effected simultaneously under control of clutches operated by means shown diagrammatically but governed by suitably grouped levers. The shaft 50, through clutch 51 and bevel gear 44, drives loose bevel gears 40, 41, either of which may be connected by a clutch 43 to the hollow shaft 23 about which the table pivots; the shaft 23, through gears' 39, 38 and bevel gears 36, 35, drives a transverse shaft 27 on which are loose sleeves connected by chains 31 to the forward sprockets 13 of the endless' tracks 14. Clutch members 34 on the hollow sleeves are adapted to lock the latter through clutch teeth 30 to the carriage to lock the respective endless track or to lock the sleeves to members 32 on the shaft 27, whereby the endless tracks are driven. The clutches 34 are operated by pivoted levers 55 connected through links 59 and bell cranks 60 to verticallymovable concentric sleeves 62, 63 passing through the hollow shaft 23 and connected to actuating levers 71, 75 on' the table 20. The shaft 48' drives a shaft 106 through reversing gearing, and the shaft 106 slues' the table 20 by means of bevel gear 110,111 and spur gearing 114, 19. Reference has been directed by the Comptroller to Specifications 4452/83, 11307/03, [both in Class 68, Hydraulic engineering], 15073/10, 211,273, [both in Class 08 (i), Excavating earth &c.], and 227,648.