CN212980461U

CN212980461U - Telescopic crank driving system of bicycle

Info

Publication number: CN212980461U
Application number: CN202021106347.1U
Authority: CN
Inventors: 朱芳华; 吴树王
Original assignee: Zhejiang Xinhui Textile Machinery Co ltd
Current assignee: Zhejiang Xinhui Textile Machinery Co ltd
Priority date: 2020-06-16
Filing date: 2020-06-16
Publication date: 2021-04-16
Anticipated expiration: 2030-06-16

Abstract

The utility model discloses a scalable crank actuating system of bicycle relates to bicycle crank drive technical field, the utility model discloses a pedal, crank guide slot, leading sprocket, follow sprocket, chain, swinging boom, chain wheel axle both ends respectively with control crank guide slot fixed connection, control crank guide slot parallel fixed, from sprocket on being provided with eccentric round pin axle, the crank is installed respectively in two crank guide slots, the one end of crank respectively with from sprocket eccentric round pin axle swivelling joint, leading sprocket and frame fixed connection. The utility model relates to a scalable crank actuating system of bicycle, under the effect of sprocket and eccentric pin axle, the automatic extension of the crank arm of force when the pedal drive to alleviate the pedal power by a wide margin, even the bicycle is ridden at high-speed shelves and also be as for not very hard.

Description

Telescopic crank driving system of bicycle

Technical Field

The utility model relates to a bicycle crank drive technical field, in particular to scalable crank actuating system of bicycle.

Background

The crank throw length of the existing pedal bicycle crank driving system is fixed, the riding speed is high, the speed regulation can be realized, the bicycle becomes more labor-consuming when the speed is increased, the bicycle also becomes an exercise tool slowly, and the office workers who are tired in one day select the electric or gasoline power-assisted bicycle with higher price, and the bicycle is replaced by the electric or gasoline power-assisted bicycle slowly.

The existing pedal bicycle is slow in riding speed and hard, and the manufacturing cost and the maintenance cost of the electric or gasoline moped are too high. To this end, we propose a crank drive system for a bicycle.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a bicycle telescopic crank driving system, which can effectively solve the problem of labor waste of the bicycle in the background technology by increasing the corresponding functional structure and effectively matching the use environment and the use demand, so as to save more labor for riding; the manufacturing cost and the maintenance cost of the bicycle are reduced.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a bicycle telescopic crank driving system comprises pedals, crank throws, crank throw guide grooves, a main chain wheel, a driven chain wheel, a chain, a rotating arm and a chain wheel shaft, wherein two ends of the chain wheel shaft are fixedly connected with the crank throw guide grooves, and the crank throw guide grooves on the left side and the right side are fixed in parallel; the driven chain wheel is provided with an eccentric pin shaft, the crank throws are respectively arranged in the guide grooves of the two crank throws, and one end of each crank throw is respectively in rotary connection with the eccentric pin shaft on the driven chain wheel; the main chain wheel is fixedly connected with the frame; the chain wheel shaft penetrates through a main chain wheel shaft hole to be connected in a rotating mode.

Preferably, the pedal is in rotating fit with one end of each crank throw, and the two crank throws are respectively installed in the crank throw guide grooves on the left side and the right side and are in sliding fit with the crank throw guide grooves. The left pedal and the right pedal are treaded to respectively drive the left crank throw and the right crank throw to rotate, and the left crank throw and the right crank throw rotate and simultaneously drive the left crank throw guide groove and the right crank throw guide groove to rotate, so that the disc shaft is driven to rotate.

Preferably, the other end of the crank throw is rotationally connected with an eccentric pin shaft of the driven chain wheel; the driven chain wheel comprises a chain wheel body, an eccentric pin shaft and a concentric pin shaft; the concentric pin shaft is rotatably connected with one end of the rotating arm, the other end of the rotating arm is rotatably connected with the concentric shaft of the main chain wheel, and the auxiliary chain wheel is connected with the main chain wheel through a chain; the crank throw rotates to drive the driven chain wheel to rotate around the main chain wheel through the eccentric pin shaft, and the crank throw makes telescopic motion under the action of the eccentric pin shaft, so that the aim of extending the arm of force of the crank throw is fulfilled, and the labor-saving effect is realized.

Preferably, the main sprocket comprises a main sprocket body and concentric shafts; the two main chain wheel bodies are fixed on two sides of a frame, a chain wheel shaft penetrates through the main chain wheel and is in rotary connection with the main chain wheel, the center of the main chain wheel is eccentric to the chain wheel shaft to a certain degree, two concentric shafts of the main chain wheel are respectively in rotary fit with one ends of two rotating arms, the other ends of the rotating arms are in rotary fit with a concentric pin shaft of a slave chain wheel, an eccentric pin shaft of the slave chain wheel is connected with a crank throw, when the center of the slave chain wheel is in the center of the eccentric pin shaft and the center of the main chain wheel, the center of the chain wheel shaft is on the same horizontal plane, and the center of the eccentric pin shaft and the center of the chain wheel shaft are closest to each other, a.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses in, crank drive system under sprocket feed's effect, the automatic extension of the crank arm of force when the pedal drive to alleviate pedal power by a wide margin. The bicycle is not very laborious even if the bicycle is ridden at a high-speed gear, can be accepted by vast office workers, and robs back a part of markets crowded by electric vehicles and gasoline power-assisted vehicles.

Drawings

Fig. 1 is a front view of the retractable crank driving system of the bicycle of the present invention;

FIG. 2 is a schematic side view of the retractable crank drive system of the present invention;

FIG. 3 is a schematic view of a main sprocket of a bicycle telescopic crank drive system of the present invention;

fig. 4 is a schematic view of the structure of the secondary sprocket of the retractable crank driving system of the bicycle of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

100. a frame; 200. a disc shaft; 300. a rotating arm; 400. a main sprocket; 500. a slave sprocket; 600. a chain; 700. a crank guide groove; 800. a crank throw; 900. pedaling; 410. concentric shaft, 420, chain wheel shaft hole; 510. concentric pin, 520, eccentric pin.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the reference is made must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, and for example, "connected" may be either fixedly connected or detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The first embodiment is as follows:

referring to fig. 1-4, the present invention relates to a retractable crank driving system for a bicycle, which comprises a frame 100, a chain wheel shaft 200, a rotating arm 300, a main chain wheel 400, a driven chain wheel 500, a chain 600, a crank guide groove 700, a crank 800 and a pedal 900, wherein one end of the crank 800 is engaged with an eccentric pin 520 of the driven chain wheel 500, the crank 800 is installed in the crank guide groove 700 and is in sliding engagement, the crank guide groove 700 is fixedly connected with the chain wheel shaft 200, and the chain wheel shaft 200 is rotatably connected with the main chain wheel 400.

Further, one end of the crank throw 800 is rotatably connected to the pedal 900, and the left and right crank throws 800 can slide in the crank throw guide groove 700 in an extending manner and can drive the crank throw guide groove 700 to rotate, thereby driving the disc shaft 200 to rotate.

Further, the other end of the crank throw 800 is connected with the eccentric pin shaft 520 of the slave chain wheel 500, the concentric pin shaft 510 of the slave chain wheel 500 is rotationally connected with the rotating arm 300, the rotating arm 300 is rotationally connected with the concentric shaft 410 of the main chain wheel 400, the pedal 900 is stepped on to drive the crank throw 800 to rotate, the slave chain wheel 500 is driven to rotate around the main chain wheel 400 through the other end, the other end of the crank throw 800 is connected with the eccentric pin shaft 520, the crank throw 800 can be driven to do telescopic sliding in the crank throw guide groove 700 during rotation, the purpose of extending the crank arm of force is achieved, and the labor-saving effect is achieved.

Further, the center of the main sprocket 400 and the sprocket shaft 200 have a certain eccentricity, when the main sprocket 400 is installed in front of the sprocket shaft 200, the auxiliary sprocket 500 is installed behind the main sprocket 400, and the eccentric pin 520 is closest to the sprocket shaft 200, the crank 800 extends forward the longest, and the pedal 900 is treaded the most easily.

Example two:

referring to fig. 1-4, the present embodiment is a characteristic working principle of a crank driving system of a bicycle:

when a rider steps on the left pedal 900 and the right pedal 900, the crank throw 800 drives the crank throw guide groove 700 to rotate, and the crank throw guide groove 700 rotates to drive the chain wheel shaft 200 to rotate, so that the bicycle is driven to move forward. The other end of the crank throw 800 is connected with the eccentric pin shaft 520, the crank throw 800 slides in the crank throw guide groove 700 under the multiple actions of the main chain wheel 400, the rotating arm 300, the auxiliary chain wheel 500 and the chain 600, so that the force arm of the crank throw 800 is extended (can be extended by about 30% -70%) when stressed, the purpose of saving labor (saving 20% -50%) is achieved, and the force arm is shortened when the crank throw is restored, thus the pedal action is not greatly increased, and the effect of saving labor is achieved.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a scalable crank actuating system of bicycle, includes frame (100), chain wheel axle (200), swinging boom (300), main sprocket (400), from sprocket (500), chain (600), crank guide slot (700), crank (800), pedal (900), its characterized in that: both ends of the dental disc shaft (200) are fixedly connected with the crank guide groove (700); the crank throw (800) is arranged on the inner surface of the crank throw guide groove (700); the two main chain wheels (400) are respectively fixed on two sides of the frame (100) and are eccentrically installed with the chain wheel shaft (200); the auxiliary chain wheel (500) is in rotating fit with the main chain wheel (400) through a rotating arm (300);

a concentric shaft (410) is welded on one surface of the main chain wheel (400); one surface of the main chain wheel (400) is provided with a chain wheel shaft hole (420); the peripheral side surface of the dental disc shaft (200) is connected with the dental disc shaft hole (420); one surface of the driven chain wheel (500) is welded with a concentric pin shaft (510), and the other surface is welded with an eccentric pin shaft (520); one end of the crank throw (800) is rotatably matched with an eccentric pin shaft (520) on the driven chain wheel (500).

2. The bicycle telescopic crank drive system according to claim 1, wherein: the crank throw (800) is in rotating fit with the pedal (900) and is in sliding fit with the crank throw guide groove (700); the driven chain wheel (500) is in rotating fit with the crank throw (800) through an eccentric pin shaft (520).

3. The bicycle telescopic crank drive system according to claim 1, wherein: the eccentric pin shaft (520) is in rotating fit with the crank (800); the concentric pin shaft (510) is in rotating fit with the rotating arm (300); the peripheral side surface of the secondary chain wheel (500) is connected with a chain (600); one side surface of the chain (600) is connected with the main chain wheel (400); the auxiliary chain wheel (500) is in transmission fit with the main chain wheel (400) through a chain (600).

4. The bicycle telescopic crank drive system according to claim 1, wherein: the two crank guide grooves (700) are parallel to each other.