CN2271999Y - Variable-speed device for bicycle and two-wheeled vehicle drawn by man - Google Patents

Abstract

The utility model relates to a speed changer for a bicycle and a man-power vehicle. The utility model is composed of a shaft, a gear, a shifting device, a shifting steel wire and a gearbox, and is arranged on a vehicle frame, wherein, the shifting steel wire which arranged on a handle bar drives the shifting device, the shifting steel wire is connected with a flywheel via gear transmission, a chainwheel and a chain; both the gear and the shifting device are arranged in a gear box, and thus the utility model has the advantages of compact structure, small size, easy maintenance and long service life. The speed change of the gear is flexible and reliable, and is three-stage speed change; the largest ratio of the speed change can be greater than 1: 10; the smallest ratio of the speed change can be less than 1: 0.5; small force is needed by the speed change and shifting; the utility model can increase and reduce levels step by step, and can directly jump from one level to another level with favorable climbing performance. The utility model can be used for bicycles, man-power tricycles, racing vehicles, etc.

Description

Bicycle, speed changer for man-power drawn vehicle

The utility model relates to a kind of change-speed box that is used for bicycle, various rickshaws.

For satisfying the needs of bicycle shift, designed the mountain region derailleur now, though it can play chronotropic action, exist following problem:

1, to stir the principle of stirring of device be that speed change by parallelogram is stirred chain to speed change, and a direction is by the steel wire pulling, and a direction is stirred by the torsion spring resilience, also has the power of stirring to chain, so firmly big during speed change; Speed change is by cone pulley, and each cone pulley is made up of several strands wheels, and few three, many six, a strand wheel accounts for 6mm, makes and stirs distance greatly.Stroke is long;

2, the speed change striking gear is located at cone pulley below, and parallelogram is stirred chain makes cochain big with the distance of following interchain, causes that the change-speed box volume is big, area occupied big, is difficult for protection, protects, and easily gets rusty, makes speed change out of control;

Though it is many that 3 gears are established, no matter be that the width difference of its big chain plate of car and little cone pulley of which shelves is big, make the chain motion that can not be in line, the wearing and tearing that strengthened chain and sprocket wheel are lacked service life;

4, because of speed change is by big chain plate band minor sprocket, belong to two stage speed change, make converter speed ratio be subjected to certain restriction, its transmission ratio was less than 1: 3.6, and is minimum＞1: 1;

During speed change chain can only with power from diameter big to little or from little transmitting to big sprocket wheel upper class level, speed change can not be bypassed the immediate leadership, be not suitable for complicated highway section and use;

6, fault is many, difficult repairs, and knows after general mountain region derailleur uses a period of time from investigation promptly to produce different faults, and can't repair that the user has to remove transmission system, and cone pulley is changed to flywheel, and derailleur then becomes ordinary bicycle.

Still also do not have at present can speed change manual tricycle, racing car, special cycle for disabled people etc.

The purpose of this utility model is the problem of being deposited at above-mentioned mountain region speed change, is intended to design that a kind of volume is little, to be easy to maintenance, long service life, speed-change and gearshift easy, firmly little, the change-speed box that converter speed ratio is big, and it is applicable to bicycle, various rickshaw.

The implementation of the purpose of this utility model is: bicycle, speed changer for man-power drawn vehicle are by three axles and be contained in eight gears on the axle, two and stir device, two and stir steel wire and constitute, and are loaded in the gearbox body, and casing is loaded on the vehicle frame with bolt 11.Gear 6,24 usefulness keys or saddle 5 are fixed on the imput shaft 4, and gear 14,18,21,22 is housed on Jie's moving axis, and gear 21,18 meshes with gear 24,6 respectively, and cogged 31,26 on the driven shaft 33.One stirs device 27 and stirs body 16 and is contained on the driven shaft 33, one stirs device and gear 14 is integral, be contained on Jie's moving axis, two stir device is driven respectively by two speed change steel wires 15, and two steel wire ends are contained in the driver last by the guide pipe 19 that is contained on the gearbox body 2.Gear 26,31 and stir device engagement.Ring washer 34 is fixed on sprocket wheel 36 on the driven shaft 33, and sprocket wheel 36 connects flywheel by chain.

The utility model is described in detail in detail with reference to the accompanying drawings.

Fig. 1 the utility model profile lateral plan.

The A-A of Fig. 2 Fig. 1 is to structural representation.

The B-B of Fig. 3 Fig. 1 is to structural representation.

Fig. 4 the utility model profile birds-eye view.

With reference to accompanying drawing, the utility model mainly adopts gear transmission, and eight gear diameter differences are contained in respectively on three axles.Be contained in two gears 6,24 and main shaft run-in synchronism on the imput shaft.Be contained in two gears 22,14 and the run-in synchronism of Jie's moving axis on Jie's moving axis, two gear 21,18 asynchronous runnings are respectively with gear 24,6 engagements.Be contained in two gears 31,26 and the asynchronous running of driven shaft on the driven shaft.Stirring device for two is contained on the handlebar two by the termination and stirs steel wire 15 and drive two gears of every utmost point steel wire control.After stirring device 27 and being driven, with gear 31,26 engagements of the asynchronous running of adorning on the driven shaft, 31,26 of gears and driven shaft run-in synchronism.With gear 14 be fitted together stir device and be struck after, with gear 18 engagements, gear 14,18 and the run-in synchronism of Jie's moving axis.The driving force of the friction speed that above-mentioned running produced is passed to the car flywheel by the minor sprocket 36 that is contained on the driven shaft 33 through chain, reaches the purpose of variable-speed operation.

Jie's moving axis 8, driven shaft 33 are quill shaft, stir body 16 dresses within it, stir the middle dress of body power assistant spring 11, spring flange 10, shelves pipe 9.When stirring device and gear mesh when not in place, power assistant spring can be delivered to engage position automatically with stirring device, and power transmission is reliable.

Guide pipe two is equipped with and is tightened the elasticity that nut 17 is stirred steel wire 15 with adjustment, is convenient to operation.Lining 32 is housed on the driven shaft 33, and in order to the spacing of 26,31 of adjusting gears, lining is other to cover 35, and it is pressed on antifriction-bearing box 29 on the gearbox body 2.

The utility model is compared with the mountain region derailleur and is had the following advantages:

1, used strength is little during gear shift, only stirs the friction of device between the sliding force on the axle and speed change steel wire and guide pipe Resistance is about about 1kg. Only need during gear shift with hand with the movable position of the speed changer on the handle as motorcycle refueling gently Rotate and get final product; Gear graduation length of run distance only needs 6mm, and the steel wire stroke is short;

2, gear and striking gear all are contained in the gearbox body, and volume is little, and area occupied is little, and easily protection has improved each The service life of parts and flexibility;

3, adopt gear-driving speed-variable, do not change the chain movement position, chain can linearly move;

4, this transmission design is a three-step gear shift, and converter speed ratio is big, reaches as high as more than 1: 10, is low to moderate below 1: 0.5 most; Variator ratio range is wide, can be according to the different converter speed ratio of needs design of different cars;

5, gear selecting is flexible, can directly change to 2 grades, 3 grades or 4 grades from 1 grade, or changes to arbitrary low grade from the arbitrary shelves of height, and speed change also can be bypassed the immediate leadership, and grade climbing performance is good, can climb 20 ° of slopes;

6, fault is little, long service life, and a change-speed box can supply 2-3 car long-term use.

Among the figure shown in other labels: 3,7 ball bearings, 12,28 bolts, 13,20,25 locknuts, 23 linings, 30 chain wheel covers.

The utility model can be used for bicycle, pedicab, car for disabled persons, racing car etc., especially knows to be applicable to that racing car adds Speed is slowed down, and various cars can be fit to the varying environment road traveling after loading onto the utility model.

Claims (4)

1, bicycle, speed changer for man-power drawn vehicle, it is characterized in that change-speed box is by three axles and be contained in eight gears on the axle, stir device for two, stirring steel wire for two constitutes, be loaded in the gearbox body, casing is contained on the vehicle frame, gear (6), (24) be fixed on the imput shaft (4) with key or saddle (5), gear (14) is housed on Jie's moving axis (8), (18), (21), (22), gear (21), (18) respectively with gear (24), (6) engagement, driven shaft (33) is gone up cogged (31), (26), one stirs device (27) and stirs body (16) and is contained on the driven shaft (33), one stirs device and gear (14) is integral, be contained on Jie's moving axis, two stir device is driven respectively by two speed change steel wires (15) by stirring body (16), two steel wire ends are contained in the driver last by the guide pipe (19) that is contained on the gearbox body (2), gear (26), (31) mesh with stirring device, ring washer (34) is fixed on sprocket wheel (36) on the driven shaft (33), and sprocket wheel (36) connects flywheel by chain.

2, change-speed box according to claim 1, the moving axis (8) that it is characterized in that being situated between, driven shaft (33) are quill shaft, stir body (16) dress within it, stir the middle dress of body power assistant spring (11), spring flange (10), shelves pipes (9).

3. change-speed box according to claim 1 is characterized in that being equipped with on the flower wheel village's cover (32), and there is lid (35) on the lining side.

4, change-speed box according to claim 1 is characterized in that guide pipe (19) two is equipped with to tighten nut (17).