CN2778657Y

CN2778657Y - Labor-saving bicycle and transmission crank

Info

Publication number: CN2778657Y
Application number: CN 200520003073
Authority: CN
Inventors: 袁金谦
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-02-28
Filing date: 2005-02-28
Publication date: 2006-05-10
Anticipated expiration: 2015-02-28

Abstract

The utility model relates to a labor-saving bicycle and a transmission crank, which comprise a bicycle frame, two wheels, a gear drive disk, a handle, a seat cushion, two cranks, and two pedals, wherein the two wheels are respectively pivoted on the front and the back ends of the lower side of the bicycle frame; the gear drive disk is pivoted at the lower side point near the middle of the bicycle frame; the handle is arranged on the front end above the bicycle frame; the seat cushion is arranged on the point near the middle above the bicycle frame; one end of the two cranks is respectively pivoted with transmission shaft centers on both sides of the gear drive disk; the two pedals are respectively pivoted on the other end of each of the two cranks. When a circumference pedaling movement is implemented to the bicycle pedals, the force application points of the cranks can pass through an upper dead point when the circumference pedaling movement is implemented in advance effectively and pass through a lower dead point lingeringly. In addition, a dead angle of a maximum force application point when the circumference pedaling movement is implemented is eliminated.

Description

Labor-saving bicycle and driving crank

Technical field

The utility model relates to a kind of labor-saving bicycle and driving crank, refers to a kind of bicycle with laborsaving driving crank especially.

Background technology

Bicycle is because light and economical and practical characteristic, be widely used in centenary history has been arranged on the vehicle, now become a kind of vehicle quite easily, bicycle needs to force on the pedal with foot-operated, drive the wheel of bicycle with chain, so that bicycle is advanced, present bicycle is having the status that can not be substituted aspect higher level amusement and recreation, the sport and body-building.Under the drive that future technology continues to make rapid progress, democratic meeting change, environment can become, but the bicycle of environmental protection all the time then can continue to make happy in daily life and offer convenience.

See also Fig. 1 and Fig. 2, show the lateral plan of existing bicycle and the partial enlarged drawing of existing crank and pedal respectively.Existing crank 1 is adopted the straight line design, should have the driving axle center 3 that crank 1 one ends are articulated in gear drive dish 2 now, when causing the foot-operated garage of driving circumference to trample motion, push down on the pedal 4 also sees through existing crank 1 this driving axle center 3 of rotation and power is passed to front drive gear 5, to reach the purpose that drives bicycle, the power that this kind exported by existing crank 1 drives front drive gear 5 rotations through driving axle center 3 mode is an effort lever principle.Yet, trample motion in driving foot-operated garage circumference, when this pedal 4 passes through first dead center (the highest position of pedal), the point of application of this pedal 4 and these existing crank 1 while and 3 one-tenth vertical straight lines of this driving axle center, be maximum output point (arrow F) herein, because application of force F, existing crank 1 and this driving axle center 3 shape that from top to bottom is in line, so when maximum output point, lever force is apart from equalling zero, and the human body shank at this moment the application of force reach maximum, but mechanical horsepower is minimum output, when this tramples motion for driving foot-operated garage circumference, be the moment maximum output that the human body shank is exerted oneself, be the position of requiring great effort most; Shank need repeat circumference and trample motion to drive bicycle again, the first dead center of maximum and shank repeated reaching moment exerts oneself, can cause leg muscle tired easily, so this traditional bicycle driving system design, easily cause mechanical power to run off, the shank big or small gap of exerting oneself is very big again, the inhomogeneous rider's of the making fatiguability of exerting oneself, and cause the efficient that drives bicycle relatively poor relatively.

The utility model content

The purpose of this utility model is to provide a kind of transmission device of bicycle, but this transmission device fast driving bicycle and reach laborsaving, effect smoothly.

The purpose of this utility model is to provide a kind of bicycle, and the driving crank of this bicycle has an effective arm of force, but fast driving bicycle and reach laborsaving, effect smoothly.

The bicycle that achieves the above object comprises: a vehicle frame; Two wheels are hubbed at the front and back end of this vehicle frame downside respectively; One gear drive dish is hubbed at this vehicle frame by middle downside place; The leader is installed on this vehicle frame top front end; One seat cushion is installed on this vehicle frame top by middle place; Two cranks, an end of this two crank is articulated in the driving axle center of the both sides of this gear drive dish respectively; Two pedals are articulated in the other end of this two crank respectively; When the pedal of this bicycle being implemented circumference trample motion, the point of application of this crank can be effectively in advance when implementing circumference and trample motion first dead center and postpone by lower dead point, and eliminate the dead angle of the maximum point of application when implementing circumference and trampling motion.Preferably, this crank has hole.Preferably, further comprise a latch, this pin bushing is through at the hole of this crank.

Description of drawings

Fig. 1 is the lateral plan that shows existing bicycle;

Fig. 2 is the partial enlarged drawing that shows existing crank and pedal;

Fig. 3 is the lateral plan that shows the utility model bicycle;

Fig. 4 shows the curved crank of the utility model bicycle and the partial enlarged drawing of pedal;

Fig. 5 is the power action diagram of demonstration power to the arm of force;

Fig. 6 is the block diagram that shows the utility model bending crank;

Fig. 7 is the block diagram that shows the L shaped crank of another embodiment of the utility model.

The specific embodiment

Though the utility model will be consulted and contain the appended graphic of the utility model preferred embodiment and fully describe, it is described herein novel to should be appreciated that before this describes the personage who is familiar with one's own profession can revise, and obtains effect of the present utility model simultaneously.Therefore, must understand following description to the personage that is familiar with one's own profession skill and Yan Weiyi discloses widely, and its content does not lie in restriction the utility model.

Please refer to Fig. 3 and Fig. 4, show the lateral plan of the utility model bicycle and the partial enlarged drawing of curved crank and pedal respectively.The utility model bicycle comprises: a vehicle frame 6; Two wheels 7 are hubbed at the front and back end of these vehicle frame 6 downsides respectively; One gear drive dish 2 is hubbed at this vehicle frame 6 by middle downside place; The leader 8, are installed on this vehicle frame 6 top front ends; One seat cushion 9 is installed on these vehicle frame 6 tops by middle place; Two bending cranks 11, the first end 111 of this bending crank 11 is articulated in the driving axle center 3 in these gear drive dish 2 outsides, this bending crank 11 has hole 12, this bending crank 11 is through at this hole 12 via these latch 10 covers and locks in admittedly on this gear drive dish 2, and the first end 111 of this bending crank 11 extends an angle to form a curve 113 with radial outward; Two pedals 4, this pedal 4 is articulated in the second end 112 of this two bendings crank 11.

Please continue to consult Fig. 4 and cooperate Fig. 5, be to show the power force on the pedal power action diagram to the arm of force.When these pedal 4 enforcement circumference are trampled motion, the application of force F (shown in arrow) that results from this pedal 4 can act on this driving axle center 3 and these pin 10 formed arm of forces, and this application of force F acts on the position of hole 12 according to its force direction (dotted line as shown in Figure 4); At this moment, then can produce a moment in these driving axle center 3 places, and the application of force F on this pedal 4 reaches these gear drive dish 2 rotations of power direct drive that this latch 10 exported and advances to drive bicycle, this kind is a laborsaving lever principle in the mode of these gear drive dish 2 rotations of power direct drive at these latch 10 places, this mode not only can reduce kinetic equation loss and can avoid rider's fatigue, and increase drives the efficient of advancing.

Seeing also Fig. 6, is the block diagram that shows the utility model bending crank.This bending crank 11 comprises: a crank main body, have first end 111 and the second end 112 and a curve 113, extend an angle forming a curve 113 by the first end 111 of this crank main body with radial outward, and this curve 113 is the usefulness as an arm of force.

Seeing also Fig. 7, is the block diagram that shows the L shaped crank of another embodiment of the utility model.These L shaped crank 21 L-shaped designs, this L shaped crank 21 comprises: a crank main body, have first end 211, the second end 212 and L portion 213, this first end 211 extends to form the minor face of this L portion 213 with radial outward, and the minor face of this L portion 213 is the usefulness as an arm of force, this the second end 212 extends to form the long limit of this L portion 213 with radial outward, and the minor face of this L portion 213 joins with long limit.

Of the present utility model excellently be at point: the point of application of this bending crank or this L shaped crank can be effectively in advance first dead center when implementing circumference and trample motion delay simultaneously and pass through lower dead point, so that making this maximum point of application dead angle of trampling motion is effectively to eliminate, and cause this bending crank or this L shaped crank when start, the moment that is produced is evenly to bring into play preferable lever principle: then the rider implements circumference and tramples motion when driving bicycle stepping on pedal with both feet, this bending crank or this L shaped crank can be brought into play laborsaving, the feedback of smooth and easy quick running, so as to make obtain when driving bicycle laborsaving, smooth and easy, the effect of fast driving bicycle.

After describing preferred embodiment of the present utility model in detail, being familiar with this technology personage can clearly understand, can carry out various variations and change not breaking away under claim and the spirit, and the utility model also is not subject to the embodiment of illustrated embodiment in the specification sheets.

Claims

1. bicycle comprises:

One vehicle frame;

Two wheels are hubbed at the front and back end of aforementioned vehicle frame downside respectively;

One gear drive dish is hubbed at aforementioned vehicle frame by middle downside place;

The leader is installed on aforementioned vehicle frame top front end;

One seat cushion is installed on aforementioned vehicle frame top by middle place;

Two driving cranks have first end and the second end, and aforementioned first end is articulated in the driving axle center in the aforesaid gears driving disk outside; And

Two pedals, aforementioned pedal is articulated in the second end of aforementioned driving crank;

It is characterized in that: between aforementioned first end and aforementioned the second end, extend an angle to form a curve from aforementioned first end radial outward.

2. bicycle as claimed in claim 1 is characterized in that described curve is provided with hole.

3. bicycle as claimed in claim 1 or 2 is characterized in that, further comprises a latch, locks in admittedly on the aforesaid gears driving disk and aforementioned driving crank is through at aforementioned hole via aforementioned pin bushing.

4. bicycle comprises:

One vehicle frame;

The leader is installed on aforementioned vehicle frame top front end;

It is characterized in that: aforementioned first end extends to form the arm of force of a minor face with radial outward, is extended to form the arm of force on a long limit with radial outward by aforementioned the second end, and aforementioned minor face and aforementioned long limit are connected to form a L portion.

5. bicycle as claimed in claim 4 is characterized in that, the minor face of described driving crank and connection, long limit are provided with hole.

6. as claim 4 or 5 described bicycles, it is characterized in that, further comprise a latch, lock in admittedly on the aforesaid gears driving disk and aforementioned driving crank is through at aforementioned hole via aforementioned pin bushing.

7. driving crank, rotatably be supported on the driving axle center of the gear drive dish of a cycle stand, it is characterized in that, described driving crank comprises a crank main body, aforementioned crank main body has first end and the second end, and between aforementioned first end and the second end, extend an angle to form a curve with radial outward by aforementioned first end.

8. driving crank as claimed in claim 7 is characterized in that described curve is provided with hole.

9. as claim 7 or 8 described driving cranks, it is characterized in that described hole is covered by a latch, so that aforementioned driving crank is locked on the aforesaid gears driving disk admittedly.

10. driving crank, rotatably be supported on the driving axle center of the gear drive dish of a cycle stand, this driving crank comprises a crank main body, this crank main body has first end and the second end, it is characterized in that, the first end of described crank main body extends forming the arm of force of a minor face with radial outward, is extended to form the arm of force on a long limit with radial outward by the second end of aforementioned crank main body, and aforementioned minor face and aforementioned long limit are connected to form a L portion.

11. driving crank as claimed in claim 10 is characterized in that, the minor face of described driving crank and connection, long limit are provided with hole.

12. as claim 10 or 12 described driving cranks, it is characterized in that described hole is covered by a latch, so that aforementioned driving crank is locked on the aforesaid gears driving disk admittedly.