| 摘要 |
An auxiliary drive arrangement, defined as a battery powered vehicle crawler, requires the modification of either a vehicle's brake disc, typically a rear brake disc, by cutting gear teeth into its circumference, a brake drum by sweating or welding a ring gear around it, or a wheel rim by securing a gear ring into it. The gear teeth typically may be driven by a motor-alternator 13. In aspects of the invention having a modified disc or drum, these may be used selectively in braking and in propulsion. The arrangement is to be used in conjunction with components including a switch and throttle mounted in the cab, an auxiliary battery or batteries, typically in a boot location, a solenoid / cable gear engagement unit and a variable speed potentiometer 12. The electric motor / alternator 13 and associated gear may be clamped and braced to the rear axle and spring of existing or new vehicles where possible and space allows. The arrangement may provide propulsion from stationary to 30 kph in slow moving traffic without the petrol / diesel engine running. A battery vacuum pump with auto switch could be installed to provide vacuum for braking. |
