CN2584503Y

CN2584503Y - Variable speed linkage of bicycle

Info

Publication number: CN2584503Y
Application number: CN 02289662
Authority: CN
Inventors: 姜华兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-12-02
Filing date: 2002-12-02
Publication date: 2003-11-05
Anticipated expiration: 2012-12-02

Abstract

The utility model relates to a speed changing connecting rod device for bicycles. The utility model is a speed changing connecting rod device for bicycles, which uses spring force to change the length of a connecting rod for a bicycle. An improved telescopic connecting rod for a spring can be designed so that persons who ride bicycles and sit on the bicycles can adjust the length of the connecting rod according to the force application size of leg parts when the bicycles are started, or are in a slow speed, or are in a high speed. The purposes of labor saving, speed change, and low movement of the leg parts can be achieved. Bicycles without a speed changing device have the functions of speed change and labor saving of speed changeable bicycles, and the cost for purchasing bicycles can be saved.

Description

The bicycle shift linkage

Technical field

The utility model relates to a kind of bicycle linkage, especially a kind ofly can adjust length of connecting rod according to shank application of force size, reaches the bicycle shift linkage of laborsaving, speed change, minimizing leg exercise purpose.

Background technology

Bicycle can be divided into two kinds of no speed change and variable-ratios.See also Fig. 1, Fig. 1 is the constructional drawing of standard bicycle.Regular Bicycle comes the rotation of drivening rod 10 with drive sprocket A by forcing in pedal D, drives rear wheel sprocket B synchronously by chain C, advances to order about bicycle.See also Figure 1A, it is the chain sprocket structure enlarged drawing of Fig. 1.Standard bicycle speed changing structure transmission principle scheme drawing and the variable-ratio bicycle is different from the Regular Bicycle part is that it reaches the purpose of speed change by a change-gear set, generally be the sprocket wheel B1 that switches to different radii by the part that near the sprocket wheel switch that is positioned at handgrip or the vehicle body is positioned at cycle chain C in trailing wheel, B2 and B3 (can be the sprocket wheel combination of more different radiis), that is the gear by changing bicycle adjusts between the speed and the application of force than (sprocket wheel than), this gear is than being such definition, for example, the wheel that diameter is 72 centimeters, two sprocket wheels by 44 and 18 teeth drive, and (72 * 44)/18 are just arranged, or 176 centimeters " gear speed ".For example going up a slope or during the opposing dead wind, the chain C that is positioned at the trailing wheel place can switched to bigger sprocket wheel B1, then can switch to less sprocket wheel B2 or B3 on the level land or during descending.

General variable-ratio bicycle mostly is young user and uses, and child, women, old man select for use bicycle mostly to be the bicycle of no speed change, and the speed that drives on the one hand is slower, then is the financial cost consideration on the other hand.

To the rider of no variable speed bicycle, in bicycle starting, at a slow speed, during high speed, not only will control the application of force, must add that health keeps balance with shank own.And for the variable speed bicycle rider, removing still needs adjust the gear ratio according to circumstances voluntarily, diverts one's attention to adjust change-speed box and also has consideration on the safety.

Summary of the invention

Because the standard bicycle transmission system still has the imperfection part, but the purpose of this utility model is to provide a kind of automatic compensation length of connecting rod, and can reach the bicycle shift linkage of laborsaving, speed change, minimizing leg exercise.

For achieving the above object, the utility model provides a kind of bicycle shift linkage, comprising:

One boxed rod is a tubular structure, and the top is tightly locked with the center shaft of bicycle drive sprocket and is connected, and the below is hollow structure;

One lower link is a tubular structure, places boxed rod inner and is connected with the boxed rod slides within, tightly locks with bicycle pedal below the lower link to combine; And

One spring, it places in the hollow structure of boxed rod, and this spring one end is fixed on the lower link top, and an end is fixed on the boxed rod inside bottom.

For achieving the above object, the utility model provides a kind of bicycle shift linkage in addition, comprising:

One boxed rod, its top is tightly locked with the center shaft of bicycle drive sprocket and is connected;

One rocking lever, its right-hand member is connected with position, boxed rod stage casing, and nearly left end place is provided with one and runs through groove;

One lower link, the one end is connected with the bottom of boxed rod, and an end then is connected with the pedal of bicycle;

One expansion link, it is a rod shaped structure, is arranged at running through in the groove of rocking lever and can be up and down, its bottom is connected with the shaft of lower link; And

One spring, the one end is fixed on the expansion link top, and an end is fixed on running through near the shaft of groove of rocking lever.

One connecting rod pedestal, one end are tightly locked with the center shaft of bicycle drive sprocket and are connected, and the other end has the groove of running through;

One expansion link is arranged at running through in the groove of connecting rod pedestal and can be up and down, and its bottom combines with bicycle pedal; And

One spring, an end is fixed on the expansion link top, near the running through the groove of an end stationary links pedestal.

According to technique scheme, the utility model bicycle shift linkage can start to walk at bicycle, at a slow speed, change force arm during high speed, and can and keep one's balance according to driving situation automatic compensation rider's the shank application of force.

When parking, the connecting rod stroke is short section because of the shank application of force extends, and dwindles the connecting rod stroke, and convenient parking is avoided damaging.

When starting (or go up a slope), the connecting rod stroke is long section because of the shank application of force extends, and rider's shank is stepped on pedal energetically, good starting and can be not vacillating and staggering.

When (or level land) at a slow speed, the connecting rod stroke transfers to the stage casing because of the shank application of force, and rider's shank is stepped on pedal with the usual application of force, can drive smoothly.

When high speed (or descending), the connecting rod stroke is short section because of the shank application of force extends, and the little application of force of rider's shank can be stepped on fast, increases the speed that drives.

By above-mentioned bicycle shift linkage, can allow no variable speed bicycle that the function of variable speed bicycle is also arranged.

In order to be easier to understand characteristics of the present utility model, see also the following drawings and of the present utility model

The embodiment explanation.

Description of drawings

Fig. 1: be the constructional drawing of standard bicycle.

Figure 1A: be standard bicycle speed changing structure transmission principle scheme drawing.

Fig. 2 A: be the constructional drawing of the utility model bicycle shift linkage first embodiment.

Fig. 2 B: be the utility model bicycle shift linkage first embodiment scheme drawing when (or descending) when the bicycle parking and at a high speed.

Fig. 2 C: be the scheme drawing of the utility model bicycle shift linkage first embodiment when bicycle is started to walk (or upward slope).

Fig. 2 D: be the scheme drawing of the utility model bicycle shift linkage first embodiment when bicycle low-speed (or level land).

Fig. 3 A: be the assembly drawing of the utility model bicycle shift linkage second embodiment.

Fig. 3 B: be the constructional drawing of the utility model bicycle shift linkage second embodiment.

Fig. 3 C: be the utility model bicycle shift linkage second embodiment scheme drawing when (or descending) when the bicycle parking and at a high speed.

Fig. 3 D: be the scheme drawing of the utility model bicycle shift linkage second embodiment when bicycle is started to walk (or upward slope).

Fig. 3 E: be the scheme drawing of the utility model bicycle shift linkage second embodiment when bicycle low-speed (or level land).

Fig. 4 A: be the assembly drawing of the utility model bicycle shift linkage second embodiment.

Fig. 4 B: be the constructional drawing of the utility model bicycle shift linkage the 3rd embodiment.

Fig. 4 C: be the utility model bicycle shift linkage the 3rd embodiment scheme drawing when (or descending) when the bicycle parking and at a high speed.

Fig. 4 D: be the scheme drawing of the utility model bicycle shift linkage the 3rd embodiment when bicycle is started to walk (or upward slope).

Fig. 4 E: be the scheme drawing of the utility model bicycle shift linkage the 3rd embodiment when bicycle low-speed (or level land).

Fig. 4 F: be the connecting rod stroke scheme drawing of the utility model bicycle shift linkage the 3rd embodiment.

The specific embodiment

See also Fig. 2, Fig. 2 A is the constructional drawing of the utility model bicycle shift linkage first embodiment.Its structure comprises boxed rod 11, lower link 12 and spring 13, wherein:

Boxed rod 11, it is a tubular structure, and the top is tightly locked with the center shaft E of bicycle drive sprocket and is connected, and the below is hollow structure.

Lower link 12, it is a tubular structure, and this lower link 12 can partly slide in boxed rod 11 borings structure, and lower link 12 belows are tightly locked with bicycle pedal D and are combined.

Spring 13, it places in the hollow structure of boxed rod 11, these spring 13 1 ends are fixed on lower link 12 tops, one end is fixed on boxed rod 11 inside bottom, by structure design so, make the bicycle rider can start to walk at bicycle, at a slow speed, during high speed, change spring 13 length according to shank application of force size, simultaneously also change the length of whole connecting rod, and can reach the purpose of laborsaving, speed change, minimizing leg exercise.

Above-mentioned is the structure of the utility model bicycle shift linkage first embodiment.Can design a loop configuration 111 in boxed rod 11 inside bottom fixes spring 13 with supporting way in addition.In addition, lower link 12 tops can be designed to loop configuration 121 and drive spring 13 to fasten mode.

In addition, the spring 13 in the foregoing description also can be replaced by elastic element, and can further elastic element and lower link 12 be designed to the structure of one, that is is designed to a rubber-like connecting rod.

Fig. 2 B is when bicycle parking and the at a high speed scheme drawing when (or descending) of the utility model bicycle shift linkage first embodiment.Parking, at a high speed or during descending, the connecting rod stroke is short section because of the shank application of force extends, and dwindles the connecting rod stroke, convenient parking is avoided damaging.

Fig. 2 C is the scheme drawing of the utility model bicycle shift linkage first embodiment when bicycle is started to walk (or upward slope).In starting or when going up a slope, the connecting rod stroke is long section because of the shank application of force extends, and rider's shank is stepped on pedal energetically, good starting and can be not vacillating and staggering.

The scheme drawing that Fig. 2 D is the utility model bicycle shift linkage first embodiment when bicycle low-speed (or level land), when when (or level land) at a slow speed, the connecting rod stroke transfers to the stage casing because of the shank application of force, and rider's shank is stepped on pedal with the usual application of force, can drive smoothly.

See also Fig. 3, Fig. 3 A and Fig. 3 B are assembly drawing and the constructional drawing of the utility model bicycle shift linkage second embodiment.Its structure comprises boxed rod 21, rocking lever 22, lower link 23, expansion link 24 and spring 25.Wherein:

Boxed rod 21, its top is tightly locked with the center shaft E of bicycle drive sprocket and is connected;

Rocking lever 22, its right-hand member is connected with position, boxed rod 21 stage casing, and nearly left end place is provided with one and runs through groove 221;

Lower link 23, one ends are connected with the bottom of boxed rod 21, and an end then is connected with the pedal D of bicycle;

Expansion link 24, it is a rod shaped structure, is arranged at running through in the groove 221 of rocking lever 22 and can be up and down, its bottom is connected with the shaft of lower link 23;

Spring 25, one end are fixed on expansion link 24 tops, and an end is fixed on running through near the groove 221 the shaft of rocking lever 22.

Above-mentioned is the structure of the utility model bicycle shift linkage second embodiment.In addition can be with the permanent seat 231 of design one tool anchor shaft 2311 on the shaft of lower link 23, circular hole 241 has then been designed in the bottom of expansion link 24, can allow the anchor shaft 2311 of permanent seat 231 pass circular hole 241 and fix expansion link 24, allow expansion link 24 the fixing mode of an end swing.

In addition, the shape and the structure that run through groove 211 are not limit, and its design goal is in order to fix expansion link 24 in a certain scope lower swing in the utility model bicycle shift linkage in along with rider's operation.Therefore, the funnel-form that preferable shape and structure can be as shown in the figure runs through groove, and funnel-form runs through the design of groove except that fixedly expansion link 24 is in a certain scope lower swing, and the also double expansion link 24 that makes can stable oscillations.In addition, in run through groove 211 on can design a fixed frame 2111, an end that is used for fixing spring 25 is on rocking lever 22.

Anchor shaft 2311 shown in the figure is used for connecting expansion link 24, and so this structure also can replace anchor shaft 2311 with the screw that passes this perforation then in 231 liang of side perforations of permanent seat, can reach equally to connect expansion link 24 but unfixed purpose.

In addition, expansion link 24 tops also can be made as a tap structure 242 and make and be provided with a plus-minus screw 243 and prop up spring 25, change the position of this screw 243 by the mode of rotating plus-minus screw 243 up and down, adjust the strength of spring 25 degrees of tightness by this.For fixing spring 25 more, also can add and establish a set collar 244 again, this set collar 244 tops system is connected with plus-minus screw 243, and spring 25 is then blocked in the below.

Spring 25 in the foregoing description also can be replaced by elastic element, and can further elastic element and expansion link 24 be designed to the structure of one, that is is designed to a rubber-like expansion link 24.

Fig. 3 C is when bicycle parking and the at a high speed scheme drawing when (or descending) of the utility model bicycle shift linkage second embodiment.Parking, at a high speed or during descending, the connecting rod stroke is short section because of the shank application of force extends, and dwindles the connecting rod stroke, convenient parking is avoided damaging.

Fig. 3 D is the scheme drawing of the utility model bicycle shift linkage second embodiment when bicycle is started to walk (or upward slope).In starting or when going up a slope, the connecting rod stroke is long section because of the shank application of force extends, and rider's shank is stepped on pedal energetically, good starting and can be not vacillating and staggering.

The scheme drawing that Fig. 3 E is the utility model bicycle shift linkage second embodiment when bicycle low-speed (or level land), when when (or level land) at a slow speed, the connecting rod stroke transfers to the stage casing because of the shank application of force, and rider's shank is stepped on pedal with the usual application of force, can drive smoothly.

See also Fig. 4, Fig. 4 A and Fig. 4 B are assembly drawing and the constructional drawing of the utility model bicycle shift linkage the 3rd embodiment.Its structure comprises connecting rod pedestal 31, expansion link 32, and spring 33.Wherein:

Connecting rod pedestal 31, one end are tightly locked with the center shaft E of bicycle drive sprocket and are connected, and the other end has the groove of running through 311;

Expansion link 32 is arranged at running through in the groove 311 of connecting rod pedestal 31 and can be up and down, and its bottom combines with bicycle pedal D; And

Spring 33, one ends are fixed on expansion link 32 tops, near the running through the groove 311 of an end stationary links pedestal 31.

Above-mentioned is the structure of the utility model bicycle shift linkage the 3rd embodiment.Also can be, and a plus-minus screw 322 is set props up spring 33 in expansion link 32 top design one tap structure 321, change the position of this screw 322 by the mode of rotating plus-minus screw 322 up and down, adjust the strength of spring 33 degrees of tightness by this.For fixing spring 33 more, can add a set collar 323 again, these set collar 323 tops are connected with plus-minus screw 322, and spring 33 is then blocked in the below.

In addition, in the middle of the expansion link 32 ring washer 324 can be set, the buffering as expansion link 32 upwards time the and stopping.

Be not subjected to dust and rainwater in order to protect spring 33, can add a dust protecting cap 34 and entangle spring 33.

Spring 33 in the foregoing description also can be replaced by elastic element, and can further elastic element and expansion link 32 be designed to the structure of one, that is is designed to a rubber-like expansion link.

Fig. 4 C is when bicycle parking and the at a high speed scheme drawing when (or descending) of the utility model bicycle shift linkage the 3rd embodiment.Parking, at a high speed or during descending, the connecting rod stroke is short section because of the shank application of force extends, and dwindles the connecting rod stroke, convenient parking is avoided damaging.

Fig. 4 D is the scheme drawing of the utility model bicycle shift linkage the 3rd embodiment when bicycle is started to walk (or upward slope).In starting or when going up a slope, the connecting rod stroke is long section because of the shank application of force extends, and rider's shank is stepped on pedal energetically, good starting and can be not vacillating and staggering.

The scheme drawing that Fig. 4 E is the utility model bicycle shift linkage the 3rd embodiment when bicycle low-speed (or level land), when when (or level land) at a slow speed, the connecting rod stroke transfers to the stage casing because of the shank application of force, and rider's shank is stepped on pedal with the usual application of force, can drive smoothly.

Fig. 4 F is the connecting rod stroke scheme drawing of the utility model bicycle shift linkage the 3rd embodiment, and by diagram as seen, the connecting rod stroke can be adjusted according to road conditions, speed, the application of force in gray area.

Upper and lower connecting rod among above-mentioned all embodiment and expansion link and pedal connection mode to each other have many kinds, and the method that not addressed by the foregoing description limits.

The above only is to describe the utility model in detail by preferred embodiment, yet for any modification and the variation that this embodiment did, the kind not equal neither disengaging spirit of the present utility model and the scope of for example material of connecting rod and expansion link change, shape size, elastic element.

Claims

1. a bicycle shift linkage is characterized in that, comprising:

2. bicycle shift linkage as claimed in claim 1 is characterized in that: the boxed rod inside bottom is for fixing the loop configuration of spring with supporting way.

3. bicycle shift linkage as claimed in claim 1 is characterized in that: the lower link top is to fasten the loop configuration that mode drives spring.

4. as claim 1,2 or 3 described bicycle shift linkages, it is characterized in that: this spring is an elastic element.

5. bicycle shift linkage as claimed in claim 4 is characterized in that: this elastic element can be structure as a whole with lower link.

6. a bicycle shift linkage is characterized in that, comprising:

7. bicycle shift linkage as claimed in claim 6 is characterized in that: the shaft of lower link has the permanent seat of a tool anchor shaft, and the bottom of expansion link has and can allow the anchor shaft of permanent seat pass to connect and the fixing circular hole of expansion link.

8. bicycle shift linkage as claimed in claim 7 is characterized in that: in permanent seat two side perforations, and have and pass this perforation in order to replace the screw of anchor shaft.

9. as claim 6,7 or 8 described bicycle shift linkages, it is characterized in that: the expansion link top is tap structure and a screw is set props up spring.

10. as claim 6,7 or 8 described bicycle shift linkages, it is characterized in that: add a set collar, this set collar top is connected with plus-minus screw, and spring is then blocked in the below.

11. bicycle shift linkage as claimed in claim 9 is characterized in that: add a set collar, this set collar top is connected with plus-minus screw, and spring is then blocked in the below.

12. as claim 6,7,8 or 11 described bicycle shift linkages, it is characterized in that: this spring is an elastic element.

13. bicycle shift linkage as claimed in claim 9 is characterized in that: this spring is an elastic element.

14. bicycle shift linkage as claimed in claim 10 is characterized in that: this spring is an elastic element.

15. as claim 13 or 14 described bicycle shift linkages, it is characterized in that: this elastic element and expansion link are structure as a whole.

16. bicycle shift linkage as claimed in claim 6, it is characterized in that: this runs through groove and is funnel-shaped structure.

17. as claim 6 or 16 described bicycle shift linkages, it is characterized in that: this runs through groove top is one to be used for fixing the fixed frame of an end on rocking lever of spring.

18. a bicycle shift linkage is characterized in that, comprising:

19. bicycle shift linkage as claimed in claim 18 is characterized in that: the expansion link top is tap structure and a plus-minus screw is set props up spring.

20. bicycle shift linkage as claimed in claim 19 is characterized in that: add a set collar, this set collar top is connected with plus-minus screw, and spring is then blocked in the below.

21., it is characterized in that as claim 18 or 19 described bicycle shift linkages: be provided with in the middle of the expansion link one when making progress as expansion link buffering and the ring washer that stops.

22., it is characterized in that: add one and entangle spring dust cover as claim 18,19 or 20 described bicycle shift linkages.

23. bicycle shift linkage as claimed in claim 21 is characterized in that: add one and entangle spring dust cover.

24. as claim 18,19 or 20 described bicycle shift linkages, it is characterized in that: this spring is an elastic element.

25. bicycle shift linkage as claimed in claim 22 is characterized in that: this spring is an elastic element.

26. bicycle shift linkage as claimed in claim 23 is characterized in that: this spring is an elastic element.

27. bicycle shift linkage as claimed in claim 24 is characterized in that: this elastic element and expansion link are structure as a whole.

28. as claim 25 or 26 described bicycle shift linkages, it is characterized in that: this elastic element and expansion link are structure as a whole.