Stepless speed regulation gearbox for precision drill seeder

Abstract

The invention provides a stepless speed regulation gearbox for a precision drill planter, wherein the stepless speed regulation gearbox comprises an upper shell, a lower shell, an output shaft and an input shaft, and further comprises a bent plate assembly, the bent plate assembly comprises a bent plate shaft and a bent plate, the bent plate assembly is arranged on the lower shell through the bent plate shaft, and the bent plate is provided with a bent plate groove; a bent plate limiting block is movably arranged on the lower shell and located on the side opposite to the bent plate groove; a cam is arranged on the input shaft; the roller assembly comprises a pair of positioning plates arranged in parallel, a one-way bearing and rollers, the rollers comprise a first roller and a second roller, the one-way bearing is arranged on the output shaft and connected with the pair of positioning plates through a one-way bearing seat, the first roller is arranged in the bent plate groove, and the second roller makes contact with the cam; a spring pull rod is arranged on a shaft sleeve of the lower shell and located between a reset spring positioning shaft and the bent plate assembly; and a reset spring is arranged between the reset spring positioning shaft and the spring pull rod. The structure is simple, the mechanical performance is stable, the size is light, and frequent disassembly for maintenance is avoided.

Description

technical field [0001] The invention relates to the technical field of gearboxes, in particular to a stepless speed-adjusting gearbox for precision drills. Background technique [0002] Continuously variable transmission refers to a transmission system that can continuously obtain any transmission ratio within the transmission range. [0003] Most of the traditional adjustable speed reducers are gear set structures, which use cylindrical gears, bevel gears or worms to form a set of transmission mechanisms to achieve the purpose of speed change. Such mechanisms are large in size, heavy in weight and cumbersome in structure. The precision requirement is extremely high, and the production cost is high. On the basis of the reduction gear set, the traditional adjustable speed reducer uses the crankshaft, shift fork, planetary gear and other parts to achieve the purpose of speed regulation, which also leads to the traditional adjustable speed reducer. The reducer is difficult to ...

AI Technical Summary

Problems solved by technology

[0003] Most of the traditional adjustable speed reducers are gear set structures, which use cylindrical gears, bevel gears or worms to form a set of transmission mechanisms to achieve the purpose of speed change. Such mechanisms are large in size, heavy in weight and cumbersome in structure. The precision requirement is extremely high, and the production cost is high. On the basis of the reduction gear set, the traditional adjustable speed reducer uses the crankshaft, shift fork, planetary gear and other parts to achieve the purpose of speed regulation, which also leads to the traditional adjustable speed reducer. Reducer manufacturing difficulties, frequent maintenance cycles, high maintenance costs and other disadvantages

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