8results about "Rotary transmissions" patented technology

The invention discloses a hand-pulled recreational vehicle. The hand-pulled recreational vehicle comprises a front wheel assembly, a rear wheel assembly, a steering mechanism, a pull wire driving mechanism, pedals and a seat. The hand-pulled recreational vehicle can obtain high speed by adopting the pull wire driving mechanism, so that the hand-pulled recreational vehicle can be used for exercise and fitness, can also be used for entertainment, and can also be used as a short-distance transportation means for riding instead of walk. The hand-pulled recreational vehicle obtains a brand new experience in the aspects of motility, interestingness, entertainment and irritation.

The invention provides an electric motorcycle which comprises a supporting frame, a driving assembly, a first transmission assembly and a second transmission assembly, and a front wheel and a rear wheel are rotationally arranged on the supporting frame; the driving assembly is connected with the supporting frame and located between the front wheel and the rear wheel. The driving assembly is in driving connection with the input end of the first transmission assembly; the output end of the first transmission assembly is connected with the input end of the second transmission assembly, and the output end of the second transmission assembly is connected with a hub of the rear wheel. The first transmission assembly comprises a transmission shaft and two universal joints located at the two axial ends of the transmission shaft. The problems that a chain transmission system in the prior art has periodic impact and non-uniform linear speed, obvious vibration and high-frequency noise are easily caused under the high-speed or high-load working condition, and the riding comfort is reduced are solved.

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.

A power module of an electric assisted bicycle is disclosed and includes a pedal shaft, a housing, a motor, a reducer, a gear-plate-output shaft, a pedal-shaft first two-way bearing and an encoder component. The housing includes a partition portion extended along a radial direction to divide the housing into a motor accommodation portion and a reducer accommodation portion, respectively. The pedal shaft is disposed in the housing and passes through an end cap of the housing along an axial direction. An extension portion of the reducer is extended toward the end cap and connected to a supporting portion of the end cap through an input-shaft rear bearing. The supporting portion, the input-shaft rear bearing and the extension portion are sleeved from inside of an inner space of the housing to outside along the radial direction sequentially, so that facilitates axial directional configuration of the encoder component and increases usage space.

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).

The utility model discloses a chainless bicycle transmission shaft which comprises a transmission shaft assembly which is installed in an integral free detachable mode, the transmission shaft assembly comprises an assembly shell, a front transmission gear assembly and a rear transmission gear assembly, the front transmission gear assembly and the rear transmission gear assembly are in transmission connection through the transmission shaft assembly, and a hollow cavity is formed in the front transmission gear assembly. And the hollow cavity is matched with a driving piece in the middle of the bicycle. According to the chainless bicycle transmission shaft, the transmission shaft assembly can be directly arranged on the middle driving piece of the bicycle in a sleeving mode, the rear transmission gear assembly is directly arranged on the axle of the rear wheel, and therefore the transmission shaft assembly can be rapidly installed and conveniently disassembled, and the transmission shaft assembly can be suitable for various types of bicycles; and the free integral disassembly and assembly of the transmission shaft assembly are realized. The problem that an existing transmission shaft cannot be freely detached and integrally installed on a middle shaft and a middle gearbox of a bicycle is effectively solved.

An inner variable-speed hub with a built-in electric motor, the hub comprising: an electric motor module (8), an input member (3), an output member (1) and a mandrel (4), wherein the mandrel (4) is fixed to a frame; and the electric motor module (8) is mounted on the mandrel (4) and is used for outputting a torque to the output member (1). The hub further comprises a transmission mechanism (7), a driving mechanism (5) and a gear shifting control mechanism (6), wherein the driving mechanism (5), the gear shifting control mechanism (6) and the transmission mechanism (7) are sequentially connected to each other and are all mounted on the mandrel (4); the input member (3) is fixedly connected to the transmission mechanism (7), and is used for inputting the torque into the transmission mechanism (7); the output member (1) is connected to the transmission mechanism (7), and is used for outputting the torque to a wheel; the transmission mechanism (7) has at least two transmission ratios; the driving mechanism (5) drives, in a manual and / or automatic manner, the gear shifting control mechanism (6) to rotate to a specific angle, so as to change transmission relationships between components in the transmission mechanism (7), thereby changing the transmission ratios of the transmission mechanism (7). The inner variable-speed hub has two modes, i.e., a manual variable-speed mode and an automatic variable-speed mode, and an electric motor is used for providing assisting power, such that riding is easier and more convenient. Further comprised are a bicycle and a gear shifting control method.