WO2008058485A1

WO2008058485A1 - An infinitely variable automatic transmission

Info

Publication number: WO2008058485A1
Application number: PCT/CN2007/071042
Authority: WO
Inventors: Zhenan Li
Original assignee: Zhenan Li
Priority date: 2006-11-14
Filing date: 2007-11-09
Publication date: 2008-05-22
Also published as: CN200967534Y

Abstract

An infinitely variable automatic transmission for a bicycle comprises a ring gear (1) and a circular plate (2). Four lugs are provided on their edges respectively. A reset spring (3) is provided between the lug of the ring gear and the lug of the circular plate. There is a hole (7) on the center of the circular plate, through which a crankshaft (6) can pass. There are plural screw mounting bores (8) set around the central hole (7). Six holes (9) for fixing the planetary gear shafts are provided on the periphery of the screw mounting bores. The planetary gears (4) provided on the planetary gear shafts are welded together with the swing arms (10). The planetary gears (4) are engaged with the ring gear (1). Flywheels (5) are mounted on other ends of swing arms (10). A chain is set on the flywheels (5). This transmission has simple structure and can startup and accelerate easily and quickly.

Description

Bicycle stepless automatic transmission

The utility model relates to a bicycle transmission. Background technique

There are currently two types of bicycle stepless automatic transmissions. One is the counter-pressure type: two pairs of press-type conical wheels sandwich a chain in between, when the front pair is pressed inward, the latter pair is placed outward; the other is the planetary gear Infinitely variable speed.

Their shortcomings are: (1) small shift range, large control error; ordinary variable speed bicycle front end large disc, respectively, 2-3 large gears, by manual controller adjustment to different diameter gears , shifting. (2) In order to prevent idling, there is a great pressure between the conical wheels, so the friction is increased, so it is very laborious to pick up. (3) When the daily bicycle is driving, only the speed of the bicycle is greater than the speed of the bicycle, the bicycle will accelerate, and the time when the bicycle exceeds the speed of the bicycle, a lot of useless work is done.

Summary of the invention

The purpose of the utility model is to provide a bicycle stepless automatic transmission which is simple in structure, easier to start, and more convenient to accelerate, in view of the defects of the existing bicycle transmission.

The technical solution of the utility model is as follows: A bicycle stepless automatic transmission, comprising an inner ring gear and a large disc, the inner tooth ring and the outer edge of the large disc are respectively provided with four mounting ears, an inner ring and a large circle There is a return spring between the mounting ears of the disc, and a circular hole for the middle shaft of the middle axle wheel is arranged in the center of the large disc, and a screw fixing hole is arranged around the circular hole, and a screw fixing hole is provided at the periphery of the screw fixing hole. a circular hole for fixing the planetary gear shaft, which is arranged on the planetary gear shaft The planetary gears are coupled to the swing arm, the planetary gears mesh with the teeth of the inner ring gear, the other end of the swing arm is mounted with a satellite flywheel, and the bicycle chain is sleeved on the satellite flywheel.

The bicycle stepless automatic transmission as described above, wherein the inner ring and the large disc are mounted at a 45 degree offset from each other.

When a person rides a bicycle, the kicker drives the large disc to rotate forward. At first, due to the friction between the bicycle and the ground, the bicycle cannot move forward immediately. When the external force continues to act on the return tension spring, the return tension spring is extended, and the planetary gear shaft rotates with the large disk, so that the swing arm is curved toward the inner side, so that the diameter of the chain placed on the satellite flywheel is Shortened, it is easier to start the bike. During the bicycle driving, due to the inertia, the force acting on the return tension spring is reduced, so that the reset tension spring gradually returns to the original shape, the swing arm basically returns to the initial position, and the diameter of the chain sleeved on the satellite flywheel gradually increases. Increase, and then play a role in acceleration. Because of the action of the inner ring, the six swing arms move at the same time.

The tension of the four tension springs can effectively control the tilt angle of the swing arm so that it does not interfere with each other. The utility model has the advantages of simple structure, quick start and acceleration and quick and convenient.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention.

Figure 2 is a structural exploded view of the inner ring and the large disc.

Figure 3 is an exploded view of the planetary gear, swing arm and satellite flywheel.

In the figure, 1. inner ring 2. large disc 3. return spring 4. planetary gear 5. satellite flywheel 6. center shaft wheel 7. round hole 8. screw fixing hole 9. round hole 10. swing arm detailed description

As shown, the bicycle stepless automatic transmission includes an inner ring 1 and a large disc 2, and the inner ring 1 and the outer disc 2 are respectively provided with four mounting ears, an inner ring and a large disc. The mounting ears are offset from each other by 45 degrees, and a return spring 3 is arranged between the inner ring and the mounting ear of the large disc, and a circular hole 7 through which the central shaft of the intermediate shaft 6 passes is provided in the center of the large disc. There is a ring of screw fixing holes 8 around the periphery of the screw fixing hole 8, and a circular hole 9 for fixing the planetary gear shaft is provided on the periphery of the screw fixing hole 8, and the planetary gear 4 provided on the planetary gear shaft is coupled with the swing arm 10 The planetary gear 4 meshes with the teeth of the internal ring gear 1. The other end of the swing arm 10 is mounted with a satellite flywheel 5, and the bicycle chain is sleeved on the satellite flywheel.

The inner ring is ring-shaped and has a diameter of 160mm. The outer ring has four mounting ears, which are evenly distributed on the outer side of the circle, and each hanging ear is provided with a hanging hole. The inside of the ring is provided with serrations and is evenly distributed inside the ring.

The large disc is a 160mm diameter disc with a circular hole in the middle and a diameter of 30mm. There are 6 screw fixing holes with a diameter of 10mm outside the circle, and 6 round holes with a diameter of 14mm. On the outside, there are also an average of 4 mounting ears with hanging holes.

The utility model utilizes the expansion and contraction state of the return spring between the inner ring gear and the mounting ear of the large disc in different driving states to adjust the relative position of the satellite flywheel on the swing arm, so as to enclose the chain hanging on the satellite flywheel. The area has changed. The reduced diameter of the chain ring makes it easier to start, and the diameter of the chain ring increases to accelerate. Compared with the existing bicycle transmission, the utility model has the advantages of simple structure, quick start and acceleration, and convenience.

Claims

Rights request

A bicycle stepless automatic transmission, comprising: an inner ring gear

(1) and a large disc (2), the inner ring (1) and the large disc (2) are respectively provided with four mounting ears at the edges, and a reset between the inner ring and the large disc The spring (3) is provided with a circular hole (7) through which the center shaft of the center shaft wheel (6) passes in the center of the large disc (2), and a screw fixing hole (8) around the round hole (7). The screw fixing hole (8) has six circular holes (9) for fixing the planetary gear shaft, and the planetary gear (4) provided on the planetary gear shaft is coupled with the swing arm (10), the planet The gear (4) meshes with the teeth of the inner ring (1), the other end of the swing arm (10) is fitted with a satellite flywheel (5), and the bicycle chain is placed over the satellite flywheel (5).

2. The bicycle stepless automatic transmission according to claim 1, wherein the inner ring (1) and the large ears (2) are mounted at a 45-degree offset from each other.

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