WO2020000566A1

WO2020000566A1 - Circular reciprocation conversion mechanism for bicycle

Info

Publication number: WO2020000566A1
Application number: PCT/CN2018/097901
Authority: WO
Inventors: 李增泉
Original assignee: 李增泉
Priority date: 2018-06-29
Filing date: 2018-08-01
Publication date: 2020-01-02
Also published as: CN108725678A

Abstract

Disclosed is a circular reciprocation conversion mechanism for a bicycle. The circular reciprocation conversion mechanism comprises two discs (1, 2) with opposite centers, and a transmission shaft (3) arranged between the two discs (1, 2) and parallel to the direction of a disc surface. The two discs (1, 2) are rotatably arranged on a connecting rod (5); a rotary handle (10, 20) is provided on each of the discs (1, 2); and raised teeth (6) are circumferentially distributed on an inner side surface of each of the discs (1, 2). The transmission shaft (3) is arranged in the direction of the diameter of the circular discs (1, 2) and is sleeved with a first gear (41) and a second gear (42). The first and the second gear (41, 42) are respectively connected to the transmission shaft (3) via two one-way transmission structures with opposite transmission directions, and the first and the second gear (41, 42) respectively engage, at front and back ends of the discs (1, 2), with the raised teeth (6) on the inner sides of the discs. A drive force is generated by converting the up-and-down reciprocating motion of pedals (11, 12) into the circumferential motion of the transmission shaft (3) so as to drive a bicycle to move forward. Conventional circumferential motion is replaced by reciprocating motion, such that unnecessary work can be reduced, thereby saving on the physical strength of a user.

Description

Bicycle reciprocating circumference conversion mechanism

Technical field

The invention relates to a bicycle transmission mechanism, in particular to a bicycle reciprocating circumferential conversion mechanism.

Background technique

In traditional bicycles, external forces are required to drive the pedals to make the cranks move in a circular motion, so that the bicycle is continuously advanced by transmission through sprocket, chain, flywheel, rear axle and other components. In the traditional transmission method, the crank on each side performs work more effectively in the quarter quadrant during the rotation, so the driving method of circular motion is laborious and inefficient.

The Chinese invention patent No. 201110080299.2 applied by the applicant discloses that the present invention discloses a double rack driving mechanism, which includes a rack, a rack, a driving gear, a driven gear, and a unidirectional ratchet. A driving shaft, a first driven shaft, and a second driven shaft are provided, and slide rails are symmetrically arranged on both sides. The driving gear is provided with a unidirectional ratchet, and the driving gear is hinged at two ends of the driving shaft of the frame. The driven gears are respectively arranged on the first driven shaft and the second driven shaft, and the two driven gears are meshed with each other. The rack is symmetrically arranged in the slideway of the frame, and the two ends of the rack are respectively connected with the drive. The gear and the driven gear mesh with each other. The invention can convert the manpower of reciprocating motion to the required rotary motion, and has the advantages of simple structure, convenient operation and wide application range. The rack is used for transmission in this structure, which increases the complexity of the structure and increases the cost and labor of manufacturing and use.

Summary of the invention

In order to solve the problem of low efficiency of the traditional bicycle transmission mode, the present invention proposes a bicycle reciprocating circle conversion mechanism.

The present invention adopts the following technical solutions:

A bicycle reciprocating circumferential conversion mechanism includes two disks with opposite center points and a transmission shaft disposed between the two disks in a direction parallel to the disk surface.

The two discs are rotatably provided on the connecting member, each disc is provided with a rotating handle, and the inner side of each disc is arranged with convex teeth along the circumferential direction.

The transmission shaft is arranged along the diameter direction of the disc, and a first gear and a second gear are sleeved on the transmission shaft. The first and second gears and the transmission shaft are respectively transmitted in opposite directions through two unidirectional directions. The transmission structure is connected, and the first and second gears are respectively meshed with the convex teeth on the inner side at the front and rear ends of the disc.

The one-way transmission structure is an internal meshing ratchet mechanism. The internal meshing ratchet mechanism includes internal ratchet teeth provided inside the first and second gears, and pawls provided on the transmission shaft. The pawls and the internal ratchet teeth work cooperatively.

Wherein, the end of the transmission handle is provided with a pedal.

The rear end of the transmission shaft is drivingly connected with the driving wheel through a bevel gear.

The invention rotates the up-and-down reciprocating motion of the pedal into a circular motion of the transmission shaft, thereby generating a driving force, and driving the bicycle to move forward. Reciprocating motion instead of traditional circular motion can reduce unnecessary work and save users' physical strength.

At the same time, the technical solution provided by the present invention has a simple structure, is easy to produce and install, and has a compact structure, which reduces the production cost and extends the service life.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural diagram of a bicycle reciprocating circle conversion mechanism according to the present invention;

FIG. 2 is a schematic side view of a bicycle reciprocating circle conversion mechanism according to the present invention in a state of disassembling one side disc.

FIG. 3 is a schematic diagram of a matching structure of a first gear and a transmission shaft according to the present invention.

(Picture: 1 first disc, 10 first turning handle, 11 first pedal, 2 second disc, 20 second turning handle, 21 second pedal, 3 drive shaft, 30 pawl, 31 inner ratchet , 41 first gear, 42 second gear, 5 connecting rods, 6 convex teeth, 7 bevel gears, 8 drive wheels.)

detailed description

In the following, the technical solutions in the embodiments of the present invention will be clearly and completely described with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments.

1 and 2, a bicycle reciprocating circle conversion mechanism includes two first disks 1 and a second disk 2 whose centers are opposite to each other, and a transmission shaft 3 provided between the two disks and parallel to the disk surface direction. . The rear end of the transmission shaft 3 is drivingly connected with the driving wheel through a bevel gear.

Two discs are rotatably provided on the connecting rod 5. A first rotary handle 10 is connected to the first disc 1. The first rotary handle 10 is provided with a first pedal 11 and a second disc 2 is connected to the first disc 1. The second rotating handle 20 is provided with a second pedal 21. In addition, convex teeth 6 are arranged on the inner side surface of each disc along the circumferential direction.

The transmission shaft 3 is rotatably disposed in the connecting rod 5 along the diameter direction of the disc. The transmission shaft 3 is sequentially arranged with a first gear 41 and a second gear 42, and a first gear and a second gear 42. The front and rear ends of the disc are respectively engaged with the convex teeth 6 on the inner side thereof, and the first and

second gears

41 and 42 and the transmission shaft 3 are respectively connected with two internal meshing ratchet mechanisms with opposite transmission directions. The internal meshing The ratchet mechanism includes an internal ratchet tooth 31 provided inside the first and

second gears

41 and 42 and a pawl 30 provided on the transmission shaft 3. The ratchet pawl 30 and the internal ratchet tooth 31 cooperate with each other.

When the first pedal 11 drives the first disc 1 downward through the first rotating handle 10, the first disc 1 drives the first gear 41 located at the front end of the transmission shaft 3 to rotate counterclockwise through the convex teeth 6 and the first gear 41 drives the transmission shaft 3 to rotate counterclockwise, and rotates the second disk 2 so that the second rotating handle 20 rotates upwards. At this time, the second gear 42 rotates clockwise between the two disks. The internal meshing ratchet mechanism makes the transmission shaft 3 rotate in the opposite direction; stepping on the second pedal 21 causes the second rotation handle 20 to drive the second disc 2 to rotate, and the second disc 2 is driven by the convex teeth 6 to the drive shaft 3 The second gear 42 at the rear end rotates counterclockwise. The second gear 42 drives the transmission shaft 3 to rotate counterclockwise, and rotates the first disc 1 so that the first transmission handle rotates upward. At this time, the first gear 41 rotates in two directions. The discs rotate clockwise. Due to the internal meshing ratchet mechanism on the discs, the transmission shaft 3 can rotate in the opposite direction. In this process, the transmission shaft 3 always keeps rotating in one direction, so that the driving wheel 8 is driven by the bevel gear 7 to move.

The above are only the preferred embodiments of the present invention, but the scope of protection of the present invention is not limited to this. Any person skilled in the technical field is within the technical scope disclosed by the present invention, according to the technical solution of the present invention. Equivalent replacements or changes of the invention concept should be covered by the protection scope of the present invention.

Claims

A bicycle reciprocating circumference conversion mechanism is characterized in that it includes two disks with opposite center points and a transmission shaft arranged between the two disks in a direction parallel to the disk surface;

The two disks are rotatably provided on the connecting member, each disk is provided with a rotating handle, and the inner side of each disk is arranged with convex teeth along the circumferential direction;

The transmission shaft is arranged along the diameter direction of the disc, and a first gear and a second gear are sleeved on the transmission shaft. The first and second gears and the transmission shaft are respectively transmitted in opposite directions through two unidirectional directions. The transmission structure is connected, and the first and second gears are respectively meshed with the convex teeth on the inner side at the front and rear ends of the disc.
The reciprocating circumferential conversion mechanism for a bicycle according to claim 1, characterized in that the one-way transmission structure is an internal meshing ratchet mechanism, and the internal meshing ratchet mechanism includes internal ratchet teeth provided inside the first and second gears and a transmission shaft The upper pawl cooperates with the inner ratchet teeth.
The bicycle reciprocating circumference conversion mechanism according to claim 1, wherein a pedal is provided at an end of the transmission handle.