The present disclosure provides a bicycle frame formed in a tube structure by bonding a left panel and a right panel together along a length direction, where the left panel and the right panel are molded into a predetermined shape, including: a battery housing unit and a reinforcement panel having a housing unit, wherein a battery is inserted into the housing unit, and wherein edges of the reinforcement panel are bonded to the left panel and the right panel.

A vehicle body frame of a saddle-ride-type vehicle which enables a high-strength joint and a reduction in the weight of the vehicle body frame. The vehicle body frame of a saddle-ride-type vehicle includes a plurality of rear frames arranged to face each other in an opposed manner and a cross frame for connecting the plurality of rear frames to each other. A through hole is formed in the rear frames arranged to face each other in an opposed manner with the cross frame being joined to the rear frames at insertion portions thereof inserted into the through holes.

A vehicle body frame of a saddle-ride-type vehicle which enables a high-strength joint and a reduction in the weight of the vehicle body frame. The vehicle body frame of a saddle-ride-type vehicle includes a plurality of rear frames arranged to face each other in an opposed manner and a cross frame for connecting the plurality of rear frames to each other. A through hole is formed in the rear frames arranged to face each other in an opposed manner with the cross frame being joined to the rear frames at insertion portions thereof inserted into the through holes.

A bicycle frame structure having a rear frame and a front frame includes a rear frame of which a left stay and a right stay are bonded to each other, and an insert portion is formed at a bonded end portion, and a front frame where a head tube is formed at a front end portion thereof, an insertion hole into which the insert portion is inserted is formed at a rear end portion thereof, and the front frame is bonded to the rear frame along the circumference of the insertion hole.

A bicycle frame structure having a rear frame and a front frame includes a rear frame of which a left stay and a right stay are bonded to each other, and an insert portion is formed at a bonded end portion, and a front frame where a head tube is formed at a front end portion thereof, an insertion hole into which the insert portion is inserted is formed at a rear end portion thereof, and the front frame is bonded to the rear frame along the circumference of the insertion hole.

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 bicycle frame unit for constructing a bicycle frame has two half casing parts and an annular supporting element. The annular supporting element is connected between the half casing parts and has a connecting hole for matching an outer contour of an external post. A gap is formed between the half casing parts and the annular supporting element, and a connecting material fills the gap and connects the half casing parts and the annular supporting element. A manufacturing method of the bicycle frame unit is also provided.

A motorcycle comprises a rear wheel; a vehicle body frame including a front frame unit supporting a motor, and a rear frame unit supporting a seat; and a swing arm which is rotatably connected to the front frame unit and supports the rear wheel, wherein the rear frame unit includes: a front section which supports the seat and extends rearward from the front frame unit; a pair of right and left branch sections extending rearward from a rear end portion of the front section to be spaced apart from each other in a rightward and leftward direction; and a pair of rear sections which extend rearward from rear end portions of the pair of right and left branch sections, respectively, and are placed rightward and leftward relative to the rear wheel.

A motorcycle comprises a rear wheel; a vehicle body frame including a front frame unit supporting a motor, and a rear frame unit supporting a seat; and a swing arm which is rotatably connected to the front frame unit and supports the rear wheel, wherein the rear frame unit includes: a front section which supports the seat and extends rearward from the front frame unit; a pair of right and left branch sections extending rearward from a rear end portion of the front section to be spaced apart from each other in a rightward and leftward direction; and a pair of rear sections which extend rearward from rear end portions of the pair of right and left branch sections, respectively, and are placed rightward and leftward relative to the rear wheel.

A vehicle body frame structure is applied to a straddle-type vehicle in which a driving power transmission mechanism which transmits rotational power of a driving source to a rear wheel is placed on a first side in a vehicle width direction with respect to a center line of a vehicle body. The structure comprises a head pipe; and a pair of main frames extending rearward and outward in the vehicle width direction from the head pipe such that the main frames are spaced apart in the vehicle width direction. The pair of main frames include right- and left-side portions, respectively, facing the transmission mechanism in the vehicle width direction, and the right-side portion located on a second side in the vehicle width direction has a stiffness lower than that of the left-side portion located on the first side in the vehicle width direction.