3results about "Rotary transmissions" patented technology

Provided is a tricycle including: a tricycle body having a first frame pivoted to a second frame, the first frame having a crank, at least one wheel shaft being rotatably arranged on the second frame; a first linkage assembly arranged on the first frame, the first linkage assembly having a first chain sleeving a first and a second chain wheels, the first chain wheel being coupled to the crank; a second linkage assembly arranged on the second frame, the second linkage assembly having a second chain sleeving a third and a fourth chain wheels, and the fourth chain wheel being coupled to the wheel shaft; and a transmission module having a first and a second universal joints connected to two ends of a telescopic cylinder respectively, the first universal joint being connected to the second chain wheel, and the second universal joint being connected to the third chain wheel.

The utility model relates to the field of mechanical parts, in particular to a tricycle and motorcycle shaft forked piece type extrusion and warm forging piece which is high in production efficiency and comprises a forked piece, and two forked holes are symmetrically formed in the forked piece. And one end of the single-head shaft and the middle part of the forked piece are integrally formed. According to the scheme, the forked part and the single-head shaft are integrally formed, when the follow-up finish machining step of the forked part and the single-head shaft is carried out subsequently, the forked part and the single-head shaft can be carried out synchronously, and the machining period needed for machining the forked part and the single-head shaft separately is shortened; and meanwhile, the forked piece and the single-head shaft do not need to be welded, so that the steps and the period required by welding are reduced, and the machining cost is reduced.

The invention provides a continuously variable transmission drive system (1) comprising a central friction drive disk (27); two rollers (159; 203) clamped against two opposite sides (30) of the drive disk (27) with their outer rims (169; 205) in friction-drive contact with drive disk (27) and being movable across the disk radius to alter the gear ratio; an input drive shaft (15) connected to the rollers (159; 203) for driving the rollers (159; 203); and a hinged clamping assembly (21; 23) which is associated with the drive shaft (15) and configured for forcibly clamping the two rollers (159; 203) around the drive disk (27) with a variable clamping force that is proportional to the input torque on drive shaft (15).