CN110588874A

CN110588874A - Bicycle with a wheel

Info

Publication number: CN110588874A
Application number: CN201910937678.5A
Authority: CN
Inventors: 王存国
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2019-12-20

Abstract

The invention discloses a bicycle which comprises a frame, a rear axle and a rear wheel, wherein the rear wheel is fixedly connected with the rear axle, the rear axle is rotatably connected on a bushing through a bearing, the frame is fixedly connected on the bushing, two ends of the rear axle are respectively provided with a pair of pedal driving devices, each pedal driving device comprises a first crank for transmitting power to the rear axle, a second crank and a third crank rotatably connected on the frame, the first crank, the second crank and the third crank are equal in length and are arranged in parallel, the connecting points of the first crank, the second crank and the third crank and the frame are three vertexes of an equilateral triangle, the free ends of the first crank, the second crank and the third crank are respectively rotatably connected with a triangular disc, the middle parts of the three discs are fixedly provided with pedal connecting rods, and the front ends of the pedal connecting rods are provided with pedals. The bicycle of the invention does not need to adopt a chain, has novel structural design and practicability.

Description

Bicycle with a wheel

Technical Field

The invention relates to the technical field of mechanical structures, in particular to a bicycle.

Background

The bicycles in the prior art are driven by chains, the chains easily stain the trouser legs when riding, and the chains are also easily damaged and stuck to mud, so that the riding is influenced, and the improvement is needed.

Disclosure of Invention

The invention aims to provide a bicycle, which aims to solve the problems that the bicycles in the prior art are driven by chains, the trouser legs are easily polluted by the chains during riding, and the chains are easily damaged and stuck to mud to influence riding.

To solve the above technical problems, an embodiment of the present invention provides a bicycle, which includes a frame, a rear axle and a rear wheel, the rear wheel is fixedly connected with a rear axle, the rear axle is rotatably connected on the bush through a bearing, the frame is fixedly connected on the bush, two ends of the rear axle are respectively provided with a pair of pedal driving devices, the pedal driving device comprises a first crank for transmitting power to the rear axle, a second crank and a third crank which are rotationally connected to the frame, the first crank, the second crank and the third crank are equal in length and are arranged in parallel, the connecting point positions of the first crank, the second crank and the third crank and the frame are three vertexes of an equilateral triangle, the free ends of the first crank, the second crank and the third crank are respectively and rotatably connected to the triangular plate, a pedal connecting rod is fixed in the middle of each triangular plate, and a pedal plate is arranged at the front end of each pedal connecting rod.

Furthermore, the connecting point positions of the triangular plate and the first crank, the second crank and the third crank are three vertexes of an equilateral triangle, the pedal connecting rod is horizontally arranged, and one end of the pedal connecting rod is fixed at the gravity center of the triangular plate.

Furthermore, the rotation angles of the first cranks on the pedal driving device respectively arranged at two sides of the rear axle are different by 180 degrees.

Further, the first crank is fixed to a rear axle.

Further, the first crank is in transmission connection with the rear axle through a gear set.

The technical scheme of the invention has the following beneficial effects:

the pedal connecting rod of the bicycle is connected to a triangular plate of a parallelogram mechanism consisting of three cranks, a first crank is driven to rotate by a rear axle so as to drive a rear wheel to advance, and the three-crank structure is designed to help the parallelogram mechanism to overcome dead points of the parallelogram mechanism. The bicycle of the invention does not need to adopt a chain, has novel structural design and practicability.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a top view structural diagram of the present invention.

Fig. 3 is a partial structural diagram of the first embodiment of the present invention.

Fig. 4 is a partial structural schematic diagram of the present invention.

Detailed Description

In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.

As shown in fig. 1 to 4, an embodiment of the present invention provides a bicycle, the bicycle includes a frame 1, a rear axle 2 and a rear wheel 3, the rear wheel 3 is fixedly connected to the rear axle 2, the rear axle 2 is rotatably connected to a bushing 4 through a bearing (not shown), the frame 1 is fixedly connected to the bushing 4, a pair of pedal driving devices are respectively installed at two ends of the rear axle 2, the pedal driving devices include a first crank 5 for transmitting power to the rear axle 2, a second crank 6 and a third crank 7 rotatably connected to the frame 1, the first, second and third cranks are arranged in parallel and are equal in length, connection points of the first, second and third cranks and the frame 1 are located at three vertexes of an equilateral triangle, free ends of the first, second and third cranks are respectively rotatably connected to a triangle 8, a pedal connecting rod 9 is fixed at a middle portion of the three cranks 8, the front end of the pedal connecting rod 9 is provided with a pedal plate 10.

The connecting point positions of the triangular plate 8 and the first, second and third cranks are three vertexes of an equilateral triangle, the pedal connecting rod 9 is horizontally arranged, and one end of the pedal connecting rod 9 is fixed at the gravity center of the triangular plate 8. The rotation angles of the first cranks 5 on the pedal driving device respectively arranged at the two sides of the rear axle 2 are different by 180 degrees.

The first crank 5 is fixed to the rear axle 2. Alternatively, the first crank 5 is drivingly connected to the rear axle 2 via a gear set (not shown).

The pedal connecting rod is connected to a triangular plate of a parallelogram mechanism consisting of three cranks, the first crank is driven to rotate by a rear axle so as to drive a rear wheel to advance, and the three cranks are structurally designed to help the parallelogram mechanism to overcome dead points of the parallelogram mechanism. The bicycle of the invention does not need to adopt a chain, has novel structural design and practicability.

While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. The bicycle comprises a frame, a rear axle and a rear wheel, and is characterized in that the rear wheel is fixedly connected with the rear axle, the rear axle is rotatably connected onto a bushing through a bearing, the frame is fixedly connected onto the bushing, two ends of the rear axle are respectively provided with a pair of pedal driving devices, each pedal driving device comprises a first crank for transmitting power onto the rear axle, a second crank and a third crank which are rotatably connected onto the frame, the first crank, the second crank and the third crank are arranged in parallel and are equal in length, the connecting points of the first crank, the second crank and the frame are three vertexes of an equilateral triangle, the free ends of the first crank, the second crank and the third crank are respectively rotatably connected onto a triangle, the middle parts of the three cranks are fixedly provided with pedal connecting rods, and the front ends of the pedal connecting rods are provided with pedals.

2. The bicycle of claim 1, wherein the connection points of the triangular plate and the first, second and third cranks are located at three vertices of an equilateral triangle, the pedal links are horizontally disposed, and one end of the pedal link is fixed at the center of gravity of the triangular plate.

3. A cycle as claimed in claim 2, wherein the rotation angles of the first cranks on the pedal drive unit mounted on each side of the rear axle differ by 180 °.

4. The bicycle of claim 3, wherein the first crank is fixed to a rear axle.

5. The bicycle of claim 3, wherein the first crank is drivingly connected to the rear axle through a gear set.