JP2517685Y2 - Chainless bicycle with front wheel vertical motion absorber - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION This invention relates to an improvement of a chainless bicycle.

[0002]

2. Description of the Related Art Conventionally, there has been a chainless bicycle as shown in FIG. However, since the saddle of the bicycle is located behind the center of the bicycle, the center of gravity of the bicycle will increase if the front wheels go up when a person rides on the bicycle and travels uphill or on uneven roads. There was a problem that the bicycle slipped backward and the front wheels rose further from the ground, the posture of the occupant became unstable, and the bicycle fell over.

[0003]

Therefore, in order to fully exhibit the function of this chainless bicycle, it is necessary to solve the above-mentioned problem concerning the center of gravity. Therefore, it is an object of the present invention to change the center of gravity of a bicycle so that a person riding the bicycle can maintain a relatively stable posture in the center of the bicycle.

[0004]

In order to solve the above problems, a chainless bicycle having a front wheel vertical movement absorbing device of the present invention has a "grip main frame under a handle and a saddle under a saddle". In a chainless bicycle including a main frame, an upper horizontal frame connecting the two to each other, and a lower central frame, the horizontal horizontal frame is divided into front and rear two stages, and the front side thereof is
It is connected to the rear side by a hinge so that it can be rotated in the vertical direction, and at the front end of the horizontal frame, it moves up and down along the connecting body fixed to the head pipe of the grip main frame.
Ri Ah provided with a slidably joined connecting member in the direction, the rear end of the horizontal frame is fixed to the main frame, said central frame is divided into two stages and forth substantially central portion
The hinges so that the front side can be rotated vertically.
Is connected in the subsequent stage of Te, front of the front end is joined to the grip main frame, the front portion of the rear stage is fixed the lower end of the main frame, the subsequent trailing edge that is fixed in the center of the rear wheel " It is characterized by

Next, according to a second aspect of the invention, "the head pipe connecting body of the grip main frame is
A fixed plate having one end fixed to the head pipe, and a cushion rod having an upper end fastened to the fixed plate with a nut and a lower end fitted in a recess in the front stage of the central frame, and the cushion rod and the grip main frame, It is characterized by being "substantially parallel".

Finally, according to the device of claim 3,
"A connecting member is provided at a front end of the horizontal horizontal frame, and the connecting member includes a plurality of bearing balls for pressing the cushion rod from both sides, a first frame body surrounding the bearing balls, and a first frame. Having a packing that encloses the body and a second frame that encloses the packing. "
It is characterized by

[0007]

According to the chainless bicycle having the front wheel vertical movement absorbing device of the present invention, the connecting member at the front end portion of the horizontal horizontal frame slides up and down on the cushion rod fixed to the head pipe of the grip main frame. Since it can move, the connecting member can move downward even if the grip main frame moves upward on an uneven road, an uphill, or the like. Further, since the presence of the hinge allows the front end of the horizontal horizontal frame to freely change the angle with the hinge 120 as the center point, even if the connecting member B moves downward, only the front end rotates but the front end. The horizontal horizontal frame behind the section can be kept substantially horizontal.

On the other hand, the central frame also tries to move upward with the movement of the grip main frame, but the front stage rotates upward with the hinge as the center point, but the latter stage when the chainless bicycle is horizontal. You can keep the same condition as. Therefore, since the connecting body, the connecting member, the front end of the horizontal horizontal frame and the front stage of the central frame act as a vertical motion absorbing device for the front wheels, the horizontal horizontal frame and the rear stage of the central frame do not move, and the main frame also moves. The position of the saddle is stable without doing.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a chainless bicycle 5 having a front wheel vertical movement absorbing device of the present invention will be described with reference to the drawings. It should be noted that the present embodiment describes the present invention in detail, and does not limit the present invention.

As shown in FIG. 1, a chainless bicycle 5 having a front wheel vertical movement absorbing device of the present invention includes a grip main frame 3 under a handle 4, a main frame 10 under a saddle 1, and both. It has an upper horizontal horizontal frame 12 and a lower central frame 2 to be connected, and the main frame 10 and a rear stage 21 of the central frame 2 are joined and fixed. The grip main frame 3
The lower end of is fixed to the center of the front wheel.

The central frame 2 has a front stage 20 and a rear stage 21.
The front and rear stages 20, 21 are connected to each other by a hinge 11 as shown in FIG. A horizontal horizontal frame 12 fastened with a nut 121 is fixed to the upper portion of the main frame 10, and the horizontal horizontal frame 12 extends toward the front end. A hinge 120 is provided near the front end of the horizontal frame 12 and a connecting member B is provided at the front end of the horizontal frame 12. The connecting member B is fixed to the head pipe 3a of the grip main frame 3. It is slidably joined to a cushion bar 33 that constitutes the body 30.

The connecting body 30 is composed of a fixed plate 31 having one end welded to the inside of the head pipe 3a and a cushion rod 33 penetrating the fixed plate 31. The upper end of the cushion rod 33 is covered with a nut 34 to close the lid. And the lower end of the cushion rod 33 is fitted into a recess 35 provided in the front stage 20 of the central frame 2.

As shown in FIG. 3, the connecting member B includes a plurality of bearing balls 330 that support the cushion rod 33 from both sides, and a first frame body 331 that surrounds the outer sides of the bearing balls 330 like a universal joint. This first frame 33
1 is composed of a soft packing 332 that surrounds the outside and a second frame body 333 that surrounds the outside of the packing 332.

As shown in FIGS. 1 and 5, an arcuate reinforcing rod 122 is joined to the rear end of the horizontal horizontal frame 12, and a fixed body 1220 fixed to the lower end of the arcuate reinforcing rod 122 is a main frame. It is fitted in ten fixing grooves 100. The arcuate reinforcing rods 122 support the horizontal horizontal frame 12 with respect to the inclined main frame 10 substantially horizontally to the ground.

The chainless bicycle 5 having the front wheel vertical movement absorbing device of the present invention constructed as described above operates as follows. Generally, when traveling uphill on a chainless bicycle, the grip main frame moves upward when the front wheels are higher than the rear wheels. Next, the horizontal horizontal frame and the central frame joined to the grip main frame also try to move upward as the grip main frame moves, so the center of gravity of the person on the rear wheel shifts further rearward, and chainless Type bicycles tend to fall.

However, in the chainless bicycle 5 having the front wheel vertical movement absorbing device of the present invention, the connecting member B at the front end portion of the horizontal horizontal frame 12 is a cushion fixed to the head pipe 3a of the grip main frame 3. Since it can slide up and down on the rod 33, even if the grip main frame 3 moves upward, the connecting member B
Can move downwards. Further, the presence of the hinge 120 allows the front end portion 13 of the horizontal horizontal frame 12 to freely change the angle about the hinge 120 as a center point, so that even if the connecting member B moves downward,
The horizontal horizontal frame 12 rearward of the front end portion 13 can be maintained in a substantially horizontal state only by rotating the front end portion 13.

On the other hand, the central frame 2 also tries to move upward with the movement of the grip main frame 3, but the front stage 20 rotates upward with the hinge 11 as the center point.
The rear stage 21 can maintain the same state as when the chainless bicycle 5 is horizontal. Therefore, the connecting body 30,
Since the connecting member B, the front end portion 13 of the horizontal horizontal frame 12 and the front stage 20 of the central frame 2 act as a vertical motion absorbing device for the front wheels, the horizontal horizontal frame 12 and the rear stage 21 of the central frame 2 do not move, and The position of the saddle 1 is also stable without moving the frame 10.

The present invention is not limited to the above embodiment, but the shape of the cushion bar 33 may be curved,
The cushion rod 33 may be wound with a spring material, or a spring material serving as a cushion may be interposed between the central frame 2 and the horizontal horizontal frame 12, and the shape of each part may be appropriately changed. Good.

[0019]

As described above in detail, even if the chainless bicycle having the front wheel vertical movement absorbing device of the present invention passes through the uneven road surface, the chainless bicycle can be moved without shifting the center of gravity of the rider back and forth. Type bicycle can be stably run.

[Brief description of drawings]

FIG. 1 is a side view showing a chainless bicycle having a front wheel vertical movement absorbing device of the present invention.

FIG. 2 is a partially cutaway sectional view showing a hinge portion of a central frame which constitutes a chainless bicycle having a front wheel vertical movement absorbing device of the present invention.

FIG. 3 is a partially cutaway side view showing a vertical movement absorbing device that constitutes a chainless bicycle having the front wheel vertical movement absorbing device of the present invention.

FIG. 4 is a partially cutaway sectional view showing a nut portion of a horizontal horizontal frame which constitutes a chainless bicycle having a front wheel vertical movement absorbing device of the present invention.

FIG. 5 is a partially cutaway sectional view showing a part of an arc-shaped reinforcing rod that constitutes a chainless bicycle having a front wheel vertical movement absorbing device of the present invention.

FIG. 6 is a side view showing a state of a chainless bicycle having a front wheel vertical movement absorbing device of the present invention when traveling on an uneven road.

FIG. 7 is a side view showing a conventional chainless bicycle.

[Explanation of symbols]

1 saddle 12 sideways horizontal frame 121 nut 20 front stage 21 rear stage 30 connection body 33 cushion rod 35 recess 330 bearing ball 331 first frame body 332 packing 333 second frame body 10 main frame 11 hinge 120 hinge 2 center frame B connection Member 3 Grip main frame 3a Head pipe 31 Fixing plate 34 Nut 4 Handle 1220 Fixing body 100 Fixing groove 5 Chainless bicycle with front wheel vertical motion absorbing device

Claims (3)

(57) [Scope of utility model registration request] 1. A chainless bicycle including a grip main frame under a handle, a main frame under a saddle, an upper horizontal frame for connecting the two, and a lower central frame for connecting the both, wherein the horizontal horizontal frame is , Divided into two stages,
The rear side is hinged so that the front side can rotate vertically.
It is connected to, the front end of the horizontal frame along the connecting member fixed to the head pipe of the grip main frame
It is vertically slidably joined connecting member provided I
Ah is, the rear end of the horizontal frame is fixed to the main frame, said central frame is divided into two stages and forth substantially central portion,
The front side is hinged so that it can rotate vertically.
Is connected to the stage, the previous stage of the front end is joined to the grip main frame, the front portion of the rear stage is fixed the lower end of the main frame, the subsequent trailing edge, characterized in that secured to the central portion of the rear wheel A chainless bicycle with a vertical motion absorber. 2. The head pipe connecting body of the grip main frame has a fixed plate having one end fixed to the head pipe, an upper end fastened to the fixed plate with a nut, and a lower end fitted in a front recess of the central frame. A chainless bicycle having a vertical motion absorbing device, characterized in that the cushion bar and the grip main frame are substantially parallel to each other. 3. A connecting member is provided at a front end of the horizontal horizontal frame, and the connecting member has a plurality of bearing balls for pressing the cushion rod from both sides, a first frame body surrounding the bearing balls, and A chainless bicycle having a vertical motion absorbing device, which has a packing surrounding the first frame and a second frame surrounding the packing.