Seat-free bicycle

Abstract

The utility model discloses a saddle-free bicycle, and mainly relates to the technical field of bicycles. Comprising a front fork, a Y-shaped frame and a rear axle frame, a V-shaped opening matched with a front wheel is formed in the front end of the Y-shaped frame, a central shaft is arranged on the front wheel, locking nuts are arranged at the two ends of the central shaft, a U-shaped frame matched with the front wheel is arranged at the bottom of the front fork, the U-shaped frame is installed on the V-shaped opening of the Y-shaped frame through the central shaft, and the rear axle frame is arranged on the rear axle frame. A pedal mechanism is arranged in the middle of the Y-shaped frame, the pedal mechanism and the front wheel are in transmission through a chain, a rear axle is horizontally arranged on the rear axle frame, the rear axle frame is hinged to the Y-shaped frame through a hinge piece, the axis of the hinge piece is perpendicular to the rear axle, springs are arranged on the left side and the right side of the hinge piece, one end of each spring is connected with the rear axle frame, and the other end of each spring is connected with the rear axle frame. Rear wheels are arranged at the left end and the right end of the rear axle; the utility model has a simple structure, is convenient to use, and can reduce the occupation of storage space.

Description

Technical Field

[0001] The utility model relates to the technical field of bicycles, in particular to a bicycle without a seat. Background Art

[0002] Traditional bicycles mostly have two wheels and a seat, and are mainly used as a means of transportation. As people's needs change, some sports-type seatless bicycles have appeared on the market. Existing seatless bicycles have both front-drive structures and rear-drive structures, but they often adopt an integral structure, which results in the existing seatless bicycles taking up a large storage space. Utility Model Content

[0003] The utility model aims to solve the problems existing in the prior art and provide a sports-type seatless bicycle which has a simple structure, is easy to use and can reduce the occupation of storage space.

[0004] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0005] A seatless bicycle comprises a front fork, a Y-shaped frame and a rear axle frame, wherein a V-shaped opening adapted to a front wheel is arranged at the front end of the Y-shaped frame, a central axis is arranged on the front wheel, locking nuts are arranged at both ends of the central axis, the front wheel is installed in the V-shaped opening of the Y-shaped frame through the central axis, a U-shaped frame adapted to the front wheel is arranged at the bottom of the front fork, a through hole adapted to the central axis is arranged at the bottom end of the U-shaped frame, the U-shaped frame is installed in the V-shaped opening of the Y-shaped frame through the central axis The front wheel is rotatably connected to the central axis, a pedal mechanism is provided in the middle of the Y-shaped frame, and a chain is used to transmit the power between the pedal mechanism and the front wheel. A rear axle is horizontally provided on the rear axle frame, and the rear axle frame is hinged to the Y-shaped frame through a hinge, and the axis of the hinge is perpendicular to the rear axle. Springs are provided on both sides of the hinge, one end of the spring is connected to the rear axle frame, and the other end is connected to the Y-shaped frame. A handlebar is provided on the top of the front fork, and rear wheels are provided on both ends of the rear axle.

[0006] Preferably, the upper portion of the U-shaped frame is a vertical portion, and the lower portion extends obliquely rearward and downward.

[0007] Preferably, the rear end of the Y-shaped frame extends obliquely rearward and downward, and a mounting seat for mounting an L-shaped connector is fixedly provided at the rear end of the Y-shaped frame, the L-shaped connector is detachably connected to the mounting seat, the hinge is arranged on the L-shaped connector, and the front end of the spring is mounted on the L-shaped connector.

[0008] Preferably, a spline connection is adopted between the support shaft of the pedal mechanism and the driving sprocket, and between the hub of the front wheel and the driven sprocket.

[0009] Preferably, a flat body is provided at the front end of the V-shaped opening of the Y-shaped frame, and a limiting groove adapted to the flat body is provided on the inner side of the bottom end of the U-shaped frame.

[0010] Compared with the prior art, the beneficial effects of the present invention are:

[0011] The utility model adopts front-wheel drive, has a simple structure, is easy to ride, and can swing left and right. It is very flexible to go uphill and down hills, which can better exercise the body. When turning, it is only necessary to tilt the body of the bicycle and use the assistance of the rear axle frame to complete the bicycle turning. When not in use, loosen the locking nut and rotate the front fork backward to the upper side of the Y-shaped frame, which can reduce the storage space occupied and is also convenient for transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is one of the structural schematic diagrams of the utility model;

[0013] Figure 2 This is the second structural diagram of the utility model;

[0014] Figure 3 It is a schematic diagram of the structure of the front fork;

[0015] Figure 4 It is a schematic diagram of the structure of the Y-type frame;

[0016] Figure 5 It is a schematic diagram of the connection structure of the rear axle frame;

[0017] Figure 6 It is a schematic diagram of the structure of the front wheel.

[0018] The numbers in the accompanying drawings are: 1. front fork; 11. U-shaped frame; 12. limit groove; 2. Y-shaped frame; 21. mounting seat; 22. flat body; 3. rear axle frame; 31. rear axle; 32. rear wheel; 4. front wheel; 5. center axis; 51. locking nut; 6. pedal mechanism; 7. hinge; 71. spring; 8. handlebar; 9. L-shaped connecting piece. DETAILED DESCRIPTION

[0019] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0020] Example: As attached Figure 1-6As shown, the utility model is a seatless bicycle, comprising a front fork 1, a Y-shaped frame 2, and a rear axle frame 3. A handlebar 8 is provided on the top of the front fork 1, the end of the handlebar 8 is matched with the handlebar cover, and the middle section of the handlebar 8 is assembled with the handlebar hole on the top of the front fork 1 and locked by screws.

[0021] The front end of the Y-shaped frame 2 is provided with a V-shaped opening adapted to the front wheel 4, and the front wheel 4 is located on the inner side of the V-shaped opening. A central axis 5 is provided in the middle of the wheel hub of the front wheel 4, and locking nuts 51 are provided at both ends of the central axis 5. A mounting hole adapted to the central axis 5 is provided at the front end of the V-shaped opening, and the front wheel 4 is installed in the V-shaped opening of the Y-shaped frame 2 through the central axis 5.

[0022] A U-shaped frame 11 adapted to the front wheel 4 is welded to the bottom of the front fork 1. A through hole adapted to the central axis 5 is provided at the bottom end of the U-shaped frame 11. The U-shaped frame 11 is located outside the V-shaped opening. The U-shaped frame 11 is installed on the V-shaped opening of the Y-shaped frame 2 through the central axis 5. The front wheel 4 is rotatably connected to the central axis 5.

[0023] Preferably, the upper portion of the U-shaped frame 11 is a vertical portion, and the lower portion extends obliquely rearward and downward, so that the handlebar 8 can be as close to the front as possible, and the space behind the handlebar 8 is increased under the premise that the length of the Y-shaped frame 2 is constant.

[0024] A pedal mechanism 6 is provided in the middle of the Y-shaped frame 2, and a chain transmission is used between the pedal mechanism 6 and the front wheel 4. Preferably, in order to ensure the stability of the transmission, a spline connection is adopted between the support shaft of the pedal mechanism 6 and the driving sprocket, and between the wheel hub of the front wheel 4 and the driven sprocket.

[0025] A rear axle 31 is horizontally arranged on the rear axle frame 3, and the rear axle frame 3 is hinged to the Y-shaped frame 2 through a hinge 7, and the axis of the hinge 7 is perpendicular to the rear axle 31. Springs 71 are arranged on both sides of the hinge 7, one end of the spring 71 is connected to the rear axle frame 3, and the other end is connected to the Y-shaped frame 2. Rear wheels 32 are arranged on both ends of the rear axle 31.

[0026] Preferably, in order to improve the stability of the connection between the Y-shaped frame and the rear axle frame, the rear end of the Y-shaped frame 2 extends obliquely rearward and downward, and a mounting seat 21 for mounting an L-shaped connector 9 is welded at the rear end of the Y-shaped frame 2, the L-shaped connector 9 and the mounting seat 21 can be connected by screws, the hinge 7 can use screws set on the L-shaped connector 9, and the front end of the spring 71 is installed on the L-shaped connector 9, and mounting seats compatible with the spring 71 are provided on the L-shaped connector 9 and the rear axle frame 3.

[0027] Preferably, in order to improve the stability of the connection between the front fork and the Y-shaped frame, a flat body 22 is provided at the front end of the V-shaped opening of the Y-shaped frame 2, and a limiting groove 12 adapted to the flat body 22 is provided on the inner side of the bottom end of the U-shaped frame 11.

[0028] When the utility model is used, the user holds the handlebar 8 while riding, and drives the front wheel 4 to rotate by stepping on the pedal mechanism 6, so that the bicycle can move. When turning, the user only needs to tilt the body of the bicycle, and at the same time, with the assistance of the rear axle frame 3, the bicycle turns. The rear axle frame 3 is provided with a spring 71, which can swing left and right, so it can help the bicycle turn. In addition, rear wheels are respectively provided at both ends of the rear axle frame 3, making the bicycle more stable. The present application adopts front-wheel drive, and the important thing is that it is small and light, the riding speed is very fast, and it can also swing left and right, and it is very flexible to go uphill and downhill, which can better exercise the body and has high safety.

Claims

1. A bicycle without a seat, characterized in that: The invention comprises a front fork (1), a Y-shaped frame (2), and a rear axle frame (3); the front end of the Y-shaped frame (2) is provided with a V-shaped opening adapted to the front wheel (4); the front wheel (4) is provided with a central axis (5); both ends of the central axis (5) are provided with locking nuts (51); the front wheel (4) is installed in the V-shaped opening of the Y-shaped frame (2) via the central axis (5); the bottom of the front fork (1) is provided with a U-shaped frame (11) adapted to the front wheel (4); the bottom end of the U-shaped frame (11) is provided with a through hole adapted to the central axis (5); the U-shaped frame (11) is installed on the V-shaped opening of the Y-shaped frame (2) via the central axis (5); the front wheel (4) is The central axis (5) is rotatably connected, a pedal mechanism (6) is provided in the middle of the Y-shaped frame (2), and a chain transmission is used between the pedal mechanism (6) and the front wheel (4). A rear axle (31) is horizontally provided on the rear axle frame (3), and the rear axle frame (3) is hinged to the Y-shaped frame (2) through a hinge (7). The axis of the hinge (7) is perpendicular to the rear axle (31). Springs (71) are provided on both sides of the hinge (7), one end of the spring (71) is connected to the rear axle frame (3), and the other end is connected to the Y-shaped frame (2). A handlebar (8) is provided on the top of the front fork (1), and rear wheels (32) are provided on both ends of the rear axle (31).

2. A bicycle without a seat according to claim 1, characterized in that: The upper part of the U-shaped frame (11) is a vertical part, and the lower part extends obliquely backward and downward.

3. A bicycle without a seat according to claim 1, characterized in that: The rear end of the Y-shaped frame (2) extends obliquely rearward and downward, and a mounting seat (21) for mounting an L-shaped connecting member (9) is fixedly provided at the rear end of the Y-shaped frame (2), the L-shaped connecting member (9) and the mounting seat (21) are detachably connected, the hinge (7) is arranged on the L-shaped connecting member (9), and the front end of the spring (71) is mounted on the L-shaped connecting member (9).

4. A bicycle without a seat according to claim 1, characterized in that: The support shaft of the pedal mechanism (6) and the driving sprocket, as well as the hub of the front wheel (4) and the driven sprocket are all connected by splines.

5. The seatless bicycle according to claim 1, characterized in that: A flat body (22) is provided at the front end of the V-shaped opening of the Y-shaped frame (2), and a limiting groove (12) adapted to the flat body (22) is provided on the inner side of the bottom end of the U-shaped frame (11).

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