CN2618849Y

CN2618849Y - Telescopic pedal

Info

Publication number: CN2618849Y
Application number: CN 03221221
Authority: CN
Inventors: 夏莹; 郭林虎
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-04-17
Filing date: 2003-04-17
Publication date: 2004-06-02
Anticipated expiration: 2013-04-17

Abstract

A scalable pedal relates to manpower vehicles driving trundle technology field, which solves the problem of difficult ascending grade of the manpower vehicles. The utility model provides a scalable pedal, whose trundle elongates to increase driving moment when a forward stroke being forced, as well as shortened driving moment and less force when a backward stroke being forced. The forward and backward strokes mutual rotate to output greater driving moment, saving labor of manpower vehicles ascending grade. The installation of the model to all manpower vehicles makes the weight-loading manpower vehicles ascend grade easily.

Description

Scalable pedal

Technical field

The utility model relates to the manpower bicycle and drives and use the caster wheel technical field.

Background technology

At present, bicycle remains the popular important vehicle, particularly in the rural area, also is a small-sized shipping instrument.But the thing that use ordinary bicycle, upward slope are parts requires great effort when load (being manned or weight) is particularly arranged on after-frame, makes the cyclist painstaking, the implementation of getting off of often having to especially very much.But the variable speed bicycle of gear shift can solve the problem of going up a slope and requiring great effort easily, but its load-carrying ability is very limited, can not show a candle to ordinary bicycle.And its cost an arm and a leg, complex structure, repairing difficulty.

Summary of the invention

The technical problems to be solved in the utility model is a Regular Bicycle upward slope difficulty, the problem of variable speed bicycle complex structure, maintenance difficult.The utility model provides a kind of pedal that can stretch, and it can be in the process that rotates a circle, and preceding pedaling pedal elongation when stressed, increases drive torque; And after when pedaling drive torque shorten, this moment is stressed less.Two pedals are one in front and one in back rotated the big moment of output mutually, and it is being laborsaving that bicycle is gone up a slope.Simple structure, for ease of maintenaince, price does not have much raisings yet.

The scheme that the utility model adopts is: a kind of telescopic pedal comprises that the edge has the disk of circular arc slideway, pin and turns that the pin that head, inner hollow both sides have a guide groove turns cover, telescopic leg turns bar, stretcher, planetary roller and mandrel thereof.Have the hole on two disks, be inserted in bicycle middle shaft from both sides, both are fixed on the bicycle tripod by mechanical connection, form an integral body.The axis parallel axes of the central axis of two disks and bicycle, and be positioned at the front upper place of axis.Pin turns first end and is fixed on the bicycle middle shaft, and the other end is being fixed pin and turned cover.Telescopic leg turns bar and places pin to turn cover, and portion is free to slide within it.Telescopic leg turns the end of bar and is adorning stretcher, stretches into the head end that pin turns cover and is fixing the mandrel of an axis and its axis normal.The two ends of mandrel are stuck in pin and turn in the guide groove of cover.In the side near disk, being equipped with can be around the planetary roller of its rotation.Planetary roller adopts free-running fit to be stuck among the circular arc slideway at round edge fully.

The width between centers of disk and bicycle middle shaft size preferably is to be 1/3rd of disk diameter.

During foot-treadle, pedal rotates around bicycle middle shaft, and planetary roller is limited in making circular movement in the circular arc slideway, thereby makes telescopic leg turn bar elongation and shortening.During elongation, it just in time is the time period of pedaling the big moment of an output forward; During shortening, it just in time is the time period of kicking backward and need not exert oneself.

The utility model structure is ingenious, and the pin of elongation turns bar greatly increases the moment that drives bicycle.When stretcher was in vertically by the bottom, long pedal can be run into ground like section, just in time made telescopic leg turn bar to shorten, so just avoided pedal to run into ground and be stuck in planetary roller in the slideway this moment.Thereby make upward slope just so not hard.

Description of drawings

Fig. 1 is an aufbauprinciple scheme drawing of the present utility model.

Fig. 2 is the A-A cutaway view of Fig. 1.

Among the figure: 1, planetary roller; 2, spider; 3, disk; 4, axis; 5, pin turns head; 6, circular arc slideway; 7, mandrel; 8, pin turns cover; 9, guide groove; 10, telescopic leg turns bar; 11, stretcher

The specific embodiment

Can find out that in conjunction with Fig. 1, Fig. 2 disk 3 is fixed near the lower triangle summit of bicycle tripod 2, has the hole on it, pack in the bicycle middle shaft 4 that two disks become one with mechanical connection.There is circular arc slideway 6 at the edge of disk 3, allows planet roller 1 in interior rolling.The parallel axes of the central axis of two disks 3 and the axis of bicycle 4, and the former is in the latter's front upper place, the distance of two axial lines be approximately disk 3 diameter 1/3rd.Pin turns 5 pin as Regular Bicycle and turns, and an end is fixed on the axis 4, and the other end is being fixed pin and turned cover 8.It is hollow that pin turns cover 8, and both sides have guide groove 9, and mandrel 7 two ends are stuck in the guide groove 9.Telescopic leg turns the end of bar 10 and is adorning stretcher 11, and the other end puts in pin and turns in the cover 8, can slide in pin turns cover 8, stretches out indentation.Put in pin and turn the end that cover 8 telescopic leg turns bar 10 mandrel 7 also is housed, mandrel 7 two ends are stuck in the guide groove 9.In the there near disk 3 planetary roller 1 is housed, planetary roller 1 revolves round the sun along circular arc slideway 6, does rotation around mandrel 7 simultaneously and rolls.When stretcher 11 is pedaled backwards by the place ahead horizontal direction, at this moment, because circular arc slideway 6 is accentrics with axis 4, and the former is in the latter's front upper place, just be with flexible foot lever 10 indentations to shorten along the planetary roller 1 that circular arc slideway 6 rolls, the degree that shortens when extreme lower position is enough to make stretcher 11 can not run into ground.And stretcher 11 is when being in the extreme higher position and pedaling forward, and at this moment, planetary roller 1 has made telescopic leg turn bar 10 to stretch out, and length strengthens, and the moment of output also increases.If any upward slope, also can bicycle be got on.

Claims

1, a kind of telescopic pedal, comprise that the edge has the disk of circular arc slideway (6) (3), pin and turns that the pin that head (5), inner hollow both sides have a guide groove (9) turns cover (8), telescopic leg turns bar (10), stretcher (11) and planetary roller 1 and mandrel (7) thereof, it is characterized in that: the both sides disk has the hole on (3), be enclosed within bicycle middle shaft (4) outside respectively from both sides, both are fixed on the bicycle tripod (2) by mechanical connection, and form an integral body; The central axis of two disks (3) parallels with axis (4) axis, and the former is positioned at the place ahead of the latter; Pin turns head (5) and is fixed on the axis (4), and the other end is being fixed pin and turned cover (8); Telescopic leg turns bar (10) and places pin to turn cover (8), and portion is free to slide within it; Telescopic leg turns the end of bar (10) and is adorning stretcher (11), and head end is being fixed the mandrel (7) of an axis and its axis normal; The two ends of mandrel (7) are stuck in pin and turn in the guide groove (9) of cover (8), and in the side near disk (3), head is equipped with can be around the planetary roller (1) of its rotation; Planetary roller (1) adopts free-running fit to be stuck among the circular arc slideway (6) on disk (3) edge.

2, scalable pedal according to claim 1 is characterized in that: disk (3) is approximately 1/3rd of disk (3) diameter with the width between centers of bicycle middle shaft (4).