CN2036517U

CN2036517U - Propulsion unit for pedal type manpower vehicle

Info

Publication number: CN2036517U
Application number: CN88207156U
Authority: CN
Inventors: 耳文华
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-06-20
Filing date: 1988-06-20
Publication date: 1989-04-26

Abstract

The utility model discloses a propulsion unit for riders riding the wheeled vehicles, which is very suitable for the pedal type propulsion unit of the bicycles and the tricycles. The propulsion unit for pedal type manpower vehicle is characterized in that a rope, a toothless chain, a toothed chain are connected with each other, which has an end flexible driving chain around the fly wheel. One end is arranged on the vehicle frame through a spring, the other end is pulled by foot bar speed variator or connected with a straight foot speed variator. The utility model can automatically change the speed according to the different operating condition, reduces the fatigue of the riders, allows the bicycles to back freely. The utility model has the advantages of simple structure and low cost when combined with the existing standard component.

Description

Propulsion unit for pedal type manpower vehicle

The utility model relates to the propelling unit that a kind of rider drives wheel, is particularly suitable for the formula of the stepping on propelling unit of bicycle, three-wheel vehicle.

At present people ride instead of walk, aspects such as loading, motion, be extensive use of miscellaneous bicycle, three-wheel vehicle.Traditional propulsion mode is sting and sprocket wheel, and comprehensive rotating sprocket drags wheel and advances.So scrunching rotating sprocket (claiming wheel disc again), is to make idle work in sizable angular range, wastes and consumes one's strength, and efficient is lower; The rider that those are old, weak, residual has inconvenience especially during use.

In order to address this problem, common way is to adopt the lever mode to drive.85204908 patents have been described a kind of " propulsive mechanism of lever propelled bicycles " that mainly is made of pedal system, change-speed box, driving center assembly, free-wheel clutch etc., but complex structure, make difficulty, are not easy to widespread use.

The purpose of this utility model is that a kind of improved propelling unit of stepping on the formula rickshaw will be provided, and it can realize the propelling or the reversing of vehicle effectively with simple mechanism.

The purpose of this utility model is achieved in that successively by rope, the flexible transmission chain that do not have toothed chain, have toothed chain respectively to be connected.Walk around the flywheel that installs wheel, an end connects vehicle frame through spring, the other end or affect with the treadle change-speed box, or connect and directly step on change-speed box.

The treadle change-speed box is that dress can be around being straight-tube shape or having the V-arrangement treadle of tubular branch of its swing on axis, and pedal assembly and the spring through playing are equipped with in the end, and connection can affect the roller set of messenger chain.

Directly step on change-speed box and be messenger chain through being loaded on the fixed pulley on tubulose vertical beam top, hang a running block, be loaded on the slide block that the vertical beam bottom has pedal, be connected running block with rope with elastic.

No toothed chain is porose by several sides, and principal section is the chain link of ㄇ shape, replaces several chain sheets of loose joint with pin respectively and is linked to be; Can also be injection molded into ㄇ shape section with the non-metallic material that accompanies silk (rope), and distolateral porose flexibility band.

The utility model can reduce and ride fatigue according to the operating different automatic speed changings that change; Vehicle can freely be moveed backward; Simple in structure, be used in combination low cost of manufacture with existing standard spare.

The concrete structure of utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is a pie graph of stepping on three-wheel vehicle according to the seat that two cover propelling units are housed that the utility model proposes;

Fig. 2 is equipped with V-shaped the riding of a cover propelling unit treadle to step on bicycle figure;

Fig. 3 is the oblique drawing of V-arrangement treadle (containing change-speed box) propelling unit;

Fig. 4 is the another kind of oblique drawing of directly stepping on change-speed box;

Fig. 5 is the exploded drawings that is linked to be no toothed chain by chain link, chain sheet, pin;

Fig. 6 is the oblique drawing of the no toothed chain of the flexible band of wired non-metal.

Below in conjunction with details and the service condition of Fig. 1～6 detailed descriptions according to the concrete device that the utility model proposes.

This device such as Fig. 1 have tricycle frame 1, dress axis 2 in the bottom bracket axle that contains.On the axle of vehicle frame both sides is the treadle 3 that is straight-tube shape around its two sections swinging respectively, and the rod end outside is the pedal assembly of habitually practising 4, and not expression among the drawing spring 5(figure of inner lifting is referring to Fig. 3), and connect roller set 6.This group is that removable mounting connects as corresponding with the axle interlude in the center shaft both ends with two billiard table shape half wheels with the barrel conformal.The bar wall of corresponding flywheel 7 is shaped on strip gab, and this has just constituted said treadle change-speed box.If flexible transmission chain is started at from connecting roller set, successively by steel rope 8, no toothed chain 9, have toothed chain (being the bicycle chain of standard) 10 respectively to be connected to form.Walk around the habitual flywheel 7 that respectively is installed in rear wheel 11 respectively, should make treadle be positioned at normal rising when stepping on, have a log tooth engagement flywheel teeth at least, and messenger chain connection roller set, be equal to or less than 90 ° with its angle to the axis line.The stretched formula spring 12 of the other end of chain connects vehicle frame.No toothed chain or selecting for use sheet steel to be pressed into principal section is the porose chain link 13 in ㄇ shape side, the position in hole, aperture and habitual chain sheet 15 adapt, and with pin 14 the two are replaced loose joint; Or becoming distolateral flexibility porose, that be ㄇ shape section to be with 16 with non-metallic material integral molded plastics such as nylon, rubber, its planted agent accompanies several Zhi Gangsi (rope) 17.The aforementioned bicycle that also can be used for just is installed in the wheel both sides with two cover flywheels.If select for use V-arrangement treadle 18(to see Fig. 2 or 3), in its two branches, the end of one dress pedal assembly, another branches into straight-tube shape, sidewall has opening, lifting spring and roller set in the top.

Fig. 4 is that another kind is directly stepped on change-speed box, the steel rope 8 of flexible transmission chain is introduced in the tubulose of vehicle frame and the vertical beam 19 that the bottom is shaped on strip gab, walk around the fixed pulley 20 on beam top, hanging the framework of running block 21, the beam lower lumen is the slide block 23 that has the pedal 22 that moves along opening of conformal, between itself and running block, with elastic such as extension spring, elastic rubber strip 24 connecting frames, use steel rope 25 simultaneously, one end is loaded on slide block, after walking around the movable pulley of running block, be fixed in Liang Bi.

If scrunch the pedal assembly by cw shown in Figure 3, treadle is swung around axle, draws messenger chain equidirectional mobile, and flywheel drags wheel and clockwise rotates, and spring 12 becomes the maximum tension attitude from initial semi-drawing state.Remove external force, spring recovers initial state (being the semi-drawing state), and chain oppositely moves and retracts treadle to initial position, and the Case of fly-wheel with one-way function slides.When vehicle drag increases, as: startup, upward slope, loads etc., spring 5 stressed stretchings make roller set diminish to the distance of axis, and step on same power this moment, and the speed of a motor vehicle slows down; Otherwise spring 5 can be condensed to initial state automatically, and said distance becomes big, uses with power treadmill speed and can accelerate.As for the change-speed box of directly stepping on shown in Figure 4, elastic 24 has certain weight range, when the wheel revolutions resistance overruns, if it is messenger chain that running block 21 need affect steel rope 8() (descend) forward to move a certain distance, need affect steel rope 25 to move two times forming at slide block 23 apart under the situation.Less than said scope the time, form and directly step on.So described device all can automatic speed changing.When requiring reversing, treadle is oppositely stirred (or pedal 22 promotes again) again by initial state, spring 12 is from the semi-drawing state, be condensed to free state fully, move after drawing messenger chain to continue, no toothed chain is walked around flywheel, the engagement of toothed chain disengaging and flywheel is arranged, and the tooth of its flywheel sleeve trackslips in no toothed chain.

Claims

1, the formula of the stepping on propelling unit of a kind of bicycle, three-wheel vehicle, form by chain, flywheel, pedal assembly, treadle (plate) etc., it is characterized in that successively respectively being connected to form by rope, no toothed chain, by toothed chain the end flexible transmission chain, walk around the flywheel that installs wheel, one end is through the spring car deck, the other end or affect with the treadle change-speed box, or connect and directly step on change-speed box.

2, propelling unit according to claim 1 is characterized in that dress can be around the barrel-contoured treadle of having of its swing on axis, and rod end is the pedal assembly, and the spring that plays with process is connected the roller set that can affect messenger chain.

3, propelling unit according to claim 1, it is characterized in that directly stepping on change-speed box, walk around the fixed pulley that is loaded on tubulose vertical beam top by messenger chain, hanging running block, in the vertical beam bottom is the slide block that pedal is housed, it is used the elastic connecting frame, and the rope that connects on it is walked around movable pulley and is fixed in Liang Bi.

4, propelling unit according to claim 1 and 2 is characterized in that treadle can be the tubular straight-bar; Can be the V shape pole with straight-tube shape branch also, barrel has strip gab.

5, according to claim 1 or 2 or 3 described propelling units, it is characterized in that not having toothed chain or chain link porose by several sides, that principal section is ㄇ shape, replace several chain sheets of loose joint with pin respectively and form; Or be injection molded into ㄇ shape section and distolateral porose flexibility band with the non-metallic material of wired (rope).