An inverted tube bike frame with bottle opener gusset system is a bicycle frame with the top tube and down tube having a heightened profile with concave sidewalls and a bottle opener gusset strengthening the joint between the seat tube and the top tube. The top tube has a downwardly curved design for added mechanical strength. Other tube-members of the frame have an elongated elliptical cross-section for increased strength and impact damage resistance. The wheel base is wider than that of a standard bicycle adding to forward movement stability and rider comfort. The design of the frame provides added strength and increased frame life with rugged service.

The present utility model discloses a two wheel electric motorized cycle frame incorporating a case-free battery, including a frame main body with a battery containment framework disposed on the frame main body. The battery is contained by the battery containment framework. At least one side of the framework is removable to facilitate replacing the battery, and partition boards are inserted in the framework to separate out a protective cavity for electrical connections. According to the present utility model, the battery is placed in the battery containment framework, so that a battery case is omitted. The battery is safely fixed in the framework, and one side of the framework is removable to facilitate replacing the battery. Furthermore, the partition boards are disposed in the framework to separate out the protective cavity for electrical connections of battery cables, thereby solving the problem that the battery cables are exposed to the outside and cannot be effectively accommodated due to replacement of an enclosed battery case with an open framework.

Electric scooter (1), with a foot rest area (2) and a loading area (3), made up of a chassis (4) with a handlebar (5) and two driving wheels (6) at a first end of the chassis (4), and comprising two electric motors connected to the driving wheels (6) with two controllers; steering control systems including an electronic sensor connected to a drive device and an electronic board connected to the electronic sensor and the two controllers, and; a support wheel (7) at a second end of the chassis, opposite the first end, having fastening points to the chassis (2) in the form of a pivot shaft (8) connected to the chassis and to a suspension fork (9).

An electric bicycle has an outer double frame, on which a steering plug with a handlebar and a front wheel with a sleeve is mounted in front of a hinge, and a rear wheel with the sleeve is attached behind. A seat is secured to the outer double frame. An internal double frame is built into the outer double frame, each double frame being a spatial construction of profile tubes rigidly connected by interconnected fastening elements with cutouts into which a battery unit is mounted. The fastening elements are triangular in shape, with at least three of these elements being located in front of the outer double frame, and one element attached to the rear side of the outer double frame. Inside the structure is strengthened by vertical elements in the angle form, with the possibility of horizontal movement. The seat is fixed to the outer double frame on a triangular element. Rear motor-wheel connected to the battery unit secured by the shock absorber element to the outer double frame on one side and a movable pendulum pivotally secured to the outer double frame on the other. The rear motor-wheel is also attached to the controller.

A tube for a bicycle has a body, an indented portion, and a machined hole. The indented portion is radially recessed in the body and has an outer bottom surface, an outer annular surface, and a first round corner being a curved surface smoothly connecting an outer tube surface of the body and the outer annular surface. The machined hole is formed through the outer bottom surface of the indented portion and has an area being less than an area of the outer bottom surface. The indented portion formed around the machined hole distributes stress to prevent cracking occurring from an edge of the machined hole. The structural strength of the tube is increased under a same total weight.

A tube for a bicycle has a body, an indented portion, and a machined hole. The indented portion is radially recessed in the body and has an outer bottom surface, an outer annular surface, and a first round corner being a curved surface smoothly connecting an outer tube surface of the body and the outer annular surface. The machined hole is formed through the outer bottom surface of the indented portion and has an area being less than an area of the outer bottom surface. The indented portion formed around the machined hole distributes stress to prevent cracking occurring from an edge of the machined hole. The structural strength of the tube is increased under a same total weight.

Embodiments of the present disclosure relate to a chassis for a two-wheeler. The chassis includes a first downtube and a second downtube and a battery mounting system. The battery mounting system includes a movable battery housing configured to house a battery under a seat of the two-wheeler and move between a closed position and an open position, at least two support members configured to support the movable battery housing, and at least one pivot hinge coupled to a front side of the movable battery housing and supporting the movable battery housing. The at least two support members and the at least one pivot hinge are configured to enable an angular movement of the movable battery housing with respect to a seat axis between the open position and the closed position, thereby enabling replacement of the battery located under the seat of the two-wheeler, while maintaining a closed seat position of the seat.

Embodiments of the present disclosure relate to a chassis for a two-wheeler. The chassis includes a first downtube and a second downtube and a battery mounting system. The battery mounting system includes a movable battery housing configured to house a battery under a seat of the two-wheeler and move between a closed position and an open position, at least two support members configured to support the movable battery housing, and at least one pivot hinge coupled to a front side of the movable battery housing and supporting the movable battery housing. The at least two support members and the at least one pivot hinge are configured to enable an angular movement of the movable battery housing with respect to a seat axis between the open position and the closed position, thereby enabling replacement of the battery located under the seat of the two-wheeler, while maintaining a closed seat position of the seat.

Provided is a seat frame for a saddled vehicle capable of increasing the coupling rigidity at the separable rear end and having aesthetic aspect. A seat frame of a vehicle body frame includes a front part fixed to the vehicle body frame and a rear part that can be disconnected from the front part, the front part and the rear part being separated at a rear part of the vehicle body. The front part and the rear part are fixed with a fastening member that engages from the inside of the vehicle width direction. The front part has a hollow rear end, and the rear part includes a solid engagement part at the front end. The fastening member as a bolt penetrates through the lateral wall at the rear end to be screwed with the engagement part inserted into the rear end. The rear part includes the engagement part and a pipe member to be connected to a rear part of the engagement part.

A seat rail installed on a vehicle body of a motorcycle. The seat rail includes an upper lateral member located on a lateral side in a width direction of the vehicle body and made of a fiber reinforced resin, the upper lateral member including a lower flange that protrudes in the width direction of the vehicle body from a lower edge of the upper lateral member. Furthermore, the seat rail includes a lower lateral member located downward from the upper lateral member and made of metal, and a lower surface of the lower flange of the upper lateral member is joined to an upper surface of the lower lateral member by adhesive.