This design incorporates four separate modules which are bolted together in this succession: a welded, structural single-unit steering tube/downtube module; independent, twin, front-to-rear horizontal frame rails which serve as the support for the rider to stand; a welded, structural single-unit module to mount shock absorbers and a swingarm; and, a welded swingarm. The defined space between the twin frame rails and the two adjoining modules can be modified by altering the length of the frame rails and/or using spacers between each rail and its corresponding module at the bolt-on location.

This design incorporates four separate modules which are bolted together in this succession: a welded, structural single-unit steering tube/downtube module; independent, twin, front-to-rear horizontal frame rails which serve as the support for the rider to stand; a welded, structural single-unit module to mount shock absorbers and a swingarm; and, a welded swingarm. The defined space between the twin frame rails and the two adjoining modules can be modified by altering the length of the frame rails and/or using spacers between each rail and its corresponding module at the bolt-on location.

A bicycle frame structure has a drop-out and includes: a fixing bracket having a rail groove formed in a frontward and rearward direction and fixed to one side of the frame; a movement member mounted to the fixing bracket to be movable forward and backward along the rail groove; a drop plate fixed to the movement member and having a drop-out formed therein for fixing a wheel; and an adjustment bolt screw-engaged by penetrating one side of the movement member. A front end of the adjustment bolt is supported by a fixing support formed in the fixing bracket. The movement member is moved along the rail groove according to rotation of the adjustment bolt.

The present invention relates to a scooter having revolving footboards comprising: a head tube; a stem rotatbly held in said head tube; a fork connected to the lower end of said stem; at least one front wheel rotatably connected to said fork of said stem; a handle connected to the upper end of said stem; two rear tubes connected to said head tube; two swivel rear wheels, where each of said swivel wheels is pivotally connected to the rear of one of said rear tubes; and at least two revolving footboards which are rotatably connected on said rear tubes.

The present invention relates to a scooter having revolving footboards comprising: a head tube; a stem rotatbly held in said head tube; a fork connected to the lower end of said stem; at least one front wheel rotatably connected to said fork of said stem; a handle connected to the upper end of said stem; two rear tubes connected to said head tube; two swivel rear wheels, where each of said swivel wheels is pivotally connected to the rear of one of said rear tubes; and at least two revolving footboards which are rotatably connected on said rear tubes.

A training bicycle with a removably attachable pedal unit enabling adjustment of chain slack by a simple method is provided. The detachable pedal unit is configured to enable attachable/detachable connection of a pedal crank to a bicycle body. The pedal unit includes a unit body having a unit connector for rotatably retaining and fastening to a bicycle body a pedal crank axially supporting a chain wheel. A unit receiving member fixedly installed on the bicycle body to interconnect with the unit connector. A sliding adjustment mechanism provided on the unit receiving member and the unit connector to vary and fix mutual fore-aft connection position of the unit receiving member and the unit connector in order to adjust fore-aft connection position of the bicycle detachable pedal unit relative to the bicycle body and thereby adjusting the chain tension.

A training bicycle with a removably attachable pedal unit enabling adjustment of chain slack by a simple method is provided. The detachable pedal unit is configured to enable attachable/detachable connection of a pedal crank to a bicycle body. The pedal unit includes a unit body having a unit connector for rotatably retaining and fastening to a bicycle body a pedal crank axially supporting a chain wheel. A unit receiving member fixedly installed on the bicycle body to interconnect with the unit connector. A sliding adjustment mechanism provided on the unit receiving member and the unit connector to vary and fix mutual fore-aft connection position of the unit receiving member and the unit connector in order to adjust fore-aft connection position of the bicycle detachable pedal unit relative to the bicycle body and thereby adjusting the chain tension.

Disclosed in the present utility model is a separable bicycle frame, comprising a front frame and a rear frame, wherein the front frame comprises a vehicle beam and a steering sleeve, and the rear frame comprises a seat tube, a bottom bracket sleeve, a lower fork, a diagonal fork, and rear connectors; a set of positioning sleeves transversely penetrating the vehicle beam are fixed at a rear part of the vehicle beam of the front frame, and end surfaces for positioning are provided at two ends of each positioning sleeve, respectively; a pair of connection supports are fixed side by side on left and right sides of the seat tube of the rear frame, and a pair of connection supports are fixed side by side on two ends of the bottom bracket sleeve, each pair of connection supports extending forward and respectively clamping the two ends of each positioning sleeve; correspondingly, limiting planes are respectively provided on opposite side surfaces of each pair of connection supports to cooperate with the end surfaces of each positioning sleeve, and each pair of connection supports is provided with transversely penetrating through-holes to cooperate with a tube hole of each positioning sleeve; and a set of bolts and nuts are used to detachably and fixedly connect the front frame and the rear frame.

Disclosed in the present utility model is a separable bicycle frame, comprising a front frame and a rear frame, wherein the front frame comprises a vehicle beam and a steering sleeve, and the rear frame comprises a seat tube, a bottom bracket sleeve, a lower fork, a diagonal fork, and rear connectors; a set of positioning sleeves transversely penetrating the vehicle beam are fixed at a rear part of the vehicle beam of the front frame, and end surfaces for positioning are provided at two ends of each positioning sleeve, respectively; a pair of connection supports are fixed side by side on left and right sides of the seat tube of the rear frame, and a pair of connection supports are fixed side by side on two ends of the bottom bracket sleeve, each pair of connection supports extending forward and respectively clamping the two ends of each positioning sleeve; correspondingly, limiting planes are respectively provided on opposite side surfaces of each pair of connection supports to cooperate with the end surfaces of each positioning sleeve, and each pair of connection supports is provided with transversely penetrating through-holes to cooperate with a tube hole of each positioning sleeve; and a set of bolts and nuts are used to detachably and fixedly connect the front frame and the rear frame.

The present disclosure provides a frame assembly of an electric motorcycle and the electric motorcycle. The frame assembly includes a first frame, a second frame, a battery, and a motor, where the first frame and the second frame are respectively mounted to the battery from a first side and a second side of the battery; the motor is mounted to the battery and/or the second frame from the second side; and the first side and the second side are opposite sides of the battery. By at least partially integrating a power system and a bearing system of the electric motorcycle together, the present disclosure can simplify an internal structure and a manufacturing cost of the electric motorcycle.