GB1060237A - Improvements in or relating to shift gears - Google Patents

Abstract

1,060,237. Change-speed gear; friction clutches. FICHTEL & SACHS A.G. Nov. 11, 1964 [Nov. 13, 1963], No. 45908/04. Headings F2C and F2D. In a toothed Reduced/Direct two-speed gear for a washing machine, wherein a hollow output shaft 2 integral with a V-belt pulley 11 and coaxially surrounding a gear input extension shaft 1 is selectively clutched to a reduced speed gear member 5 or the input extension shaft 1, the Direct drive clutch is a coil spring friction clutch which comprises a coil spring 23 frictionally secured to the input shaft extension and contractible or expansible into clutching engagement with the hollow output shaft and is actuated by a spring-returned stationary solenoid 40 through a rotating or non-rotating shift sleeve 19 and at least one shift pin extending axially through the pulley or radially through the hollow output shaft. The Reduced drive clutch between the toothed gear and the pulley may be a plate or dog clutch actuated by a further or the said solenoid, or, as shown. a double-acting one-way clutch 14 permitting Reverse operation. The gear may provide two speeds when used with a single speed electric driving motor or two speeds for each speed of a multi-speed motor. As shown, an epicyclic gear comprises a carrier 5 having planets 6 meshing an input sun 3 and a fixed ring 8. A solenoid rod 16 has an end directly engaging the sleeve 19 against which is spring-urged a disc 15 carrying pins 13 extending through the pulley 11. For Reduced drive, the hollow output shaft 2 is connected through the one-way clutch 14 to the carrier 5, and for Direct drive the solenoid is energized to axially move the pins so that one is engaged by the bent-up end 24 of the contractible spring 23 to clutch the shafts 1, 2 together, the one-way clutch 14 releasing. In a two-speed countershaft gear (Fig. 2, not shown), one of the pins 13, directly connected to the sleeve 19, is engaged by the bent-up end of a drag spring frictionally entrained by a beaker-shaped member which surrounds the contractible clutch spring 23, is rotatable on the shaft 1, and has a recess through which projects the clutch spring bent-up end 24. In Fig. 3 (not shown), the sleeve 19 has a conical bore by which one or more pins radially extending through the hollow shaft are cammed into the path of the bent-up end of a drag spring frictionally entrained by a bush engaged by a clutch spring expansible into engagement with the bore of the hollow shaft. In Figs. 4, 5 (not shown), the solenoid acts on the sleeve 19 through a fork having sleeve groove engaging rollers of synthetic plastics. The sleeve 19, pins 13 and other gear parts may be of synthetic plastics.