| 摘要 |
1,146,321. Variable-speed friction gears. ENGLISH ELECTRIC CO. Ltd. 9 March, 1966 [9 March, 1965], No. 9962/65. Heading F2D. In a variable-speed friction gear of the type in which precessing rollers are engaged between axially loaded toric driving and driven discs each roller is mounted on a carriage, one end of which houses a fluid pressure piston, and one of the discs is formed as a piston supplied with pressure fluid from the same source as the carriage pistons whereby the axial force of the discs on the rollers is related to the tangential force on the roller carriages and thus to the load torque. As shown, one set of rollers 22 are mounted between discs 14, 20 connected to the driving and driven shafts 11, 12 respectively and a second set of rollers 23 are mounted between disc 20 and a third disc 15 formed as a piston in a cylinder member 54. The rollers are mounted on carriages 30 supported by spiders 26, 27, the former of which is integral with a sleeve 16 passing freely through the middle disc 20 and engaging the driving shaft 11. The ends of the carriages 30 hav spherical portions 32, 33 engaging lubricated recesses 34 and fluid pressure pistons 36, pressure being applied to the carriage pistons through passages 41 and to the rear of disc piston 15 from a pipe 46 and pump 43 through an axial passage 52, the pressure being regulated by a governor 45 subject to speed or torque control. The gear may be arranged for both forward and reverse operation by providing the pistons 36 at both ends of the roller carriages. |
