CN213921383U

CN213921383U - Crank device and bicycle

Info

Publication number: CN213921383U
Application number: CN202022145689.0U
Authority: CN
Inventors: 王勇; 牟代坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-09-25
Filing date: 2020-09-25
Publication date: 2021-08-10
Anticipated expiration: 2030-09-25

Abstract

The utility model discloses a crank device, which comprises a crank, connect through adjusting part between crank cantilever and the bicycle pedal axle, adjusting part is used for adjusting the pedal axle is relative the distance of crank axle. A crank device, through adjusting part adjusts the pedal axle with distance between the crank axle still can satisfy the long crowd of different legs and ride well under the condition of not adjusting the saddle, the whole focus of people's car system is roughly unchangeable simultaneously, rides also more steadily, this crank device simple structure, convenient to use, respond well.

Description

Crank device and bicycle

Technical Field

The utility model relates to a bicycle field especially relates to a crank device and bicycle.

Background

As shown in figure 1, the driving part of the bicycle comprises a crank 1, the crank 1 is vertically connected with a pedal shaft 2, pedals 3 are sleeved outside the pedal shaft 2, and the purpose of saving labor when a person rides the bicycle is achieved by using a cantilever of the crank 1. However, different people have different legs, the cantilever of the existing crank 1 is of a fixed-length structure, so that when a part of people ride a bicycle, the legs of the people are still difficult to stretch when the pedals 3 run to the bottom, the legs are still in a bent state to exert force, and the aim of saving labor is difficult to achieve.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: to the current fixed length structure of crank cantilever that prior art exists for fixed, in order to make people's leg can straighten at the in-process of riding, common way risees the saddle, but this can cause whole people's car system focus to rise, and the equilibrium and the stability of riding by bike reduce, cause the problem of accident easily, provide a crank device and bicycle.

In order to realize the purpose, the utility model discloses a technical scheme be:

the utility model provides a crank device, includes the crank, connect through adjusting part between crank cantilever and the bicycle pedal axle, adjusting part is used for adjusting the pedal axle is relative the distance of crank axle.

In the present application, the bicycle may be replaced with a functionally positioned cycle capable of pedaling such as an electric bicycle, a tricycle, and a motorcycle having a crank structure.

Adopt a crank device, through adjusting part adjusts the pedal axle with distance between the crank axle still can satisfy different long crowds of leg and ride well under the condition of not adjusting the saddle, the whole focus of people's car system is roughly unchangeable simultaneously, rides also more steadily, this crank device simple structure, convenient to use, respond well.

Preferably, the adjusting part includes a plurality of elbow, every the one end length of elbow is unanimous, and other end length is all inconsistent, the one end of elbow can be dismantled connect in crank cantilever tip, the other end of elbow can be dismantled connect in the pedal axle.

Adopt this kind of structure setting, keep crank cantilever length is unchangeable, through increasing different models the elbow will different length is down regulated to the epaxial pedal of pedal, satisfies different motorcycle types and different crowds' user demand, and this structure has increased arm of force length simultaneously for ride more laborsavingly, can conveniently increase and decrease the arm of force in a flexible way, simultaneously in the still adjustable pedal of not adjusting the cushion, in order to reach perfect coordination unified, general personal words, need not transfer after transferring, adapt to different motorcycle types, different crowds, also be applicable to the repacking of original bicycle, save time, it is laborsaving.

Further preferably, one end of the elbow is connected to the end of the crank arm by a first bolt, and the other end of the elbow is connected to the pedal shaft by a first screw.

Further preferably, the elbow is of a U-shaped structure or an L-shaped structure.

Further preferably, the pedal shaft is of an L-shaped structure.

Further preferably, the crank arm, the elbow and the pedal shaft are integrally formed components.

Preferably, the adjusting part includes the support, locates the first through-hole of crank cantilever tip with locate second through-hole on the support, the leg joint the pedal axle, the support is used for being on a parallel with the crank cantilever sets up, first through-hole includes two, follows crank cantilever length direction interval sets up, and the interval is L, the second through-hole includes at least three, the second through-hole is followed support length direction equidistance L interval sets up, first through-hole passes through the second bolt and corresponds the connection can be dismantled to the second through-hole.

By adopting the structure, the length of the crank cantilever is kept unchanged, the crank is connected with the bracket through the second bolt, the distance between the pedal shaft and the crank shaft is changed by adding the bracket, and the use requirements of different vehicle types and different people are met.

Further preferably, the second through-hole includes four, four the second through-hole has three L length, makes the support with the connection of crank cantilever has three adjustable gear, realizes the pedal axle is relative the crank axle has three adjustable distance, satisfies different leg length crowds and uses.

Further preferably, the crank cantilever length is equal to the cradle length.

The utility model also provides a bicycle, including frame, handle, front wheel, rear wheel, chain, brake, still include as above arbitrary one crank device, crank device rotates to set up on the frame, crank device passes through the chain connect in the rear wheel, the pedal axle overcoat is equipped with the pedal.

Adopt a bicycle, through adjusting part adjusts the pedal axle with distance between the crank axle still can satisfy different long crowds of leg and ride well under the condition of not adjusting the saddle, the whole focus of people's car system is roughly unchangeable simultaneously, rides also more steadily, this bicycle simple structure, convenient to use, respond well.

To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:

1. the crank device of the utility model adjusts the distance between the pedal shaft and the crank shaft through the adjusting part, can still meet the requirement of people with different leg lengths to ride well without adjusting the bicycle cushion, and meanwhile, the whole gravity center of the human-vehicle system is approximately unchanged, the riding is more stable, and the crank device has simple structure, convenient use and good effect;

2. the utility model discloses a crank device, keep crank cantilever length unchangeable, through increasing different models the elbow, with the epaxial pedal of pedal down-regulation different length, satisfy the user demand of different motorcycle types and different crowds, simultaneously this structure has increased arm of force length, make to ride more laborsavingly, can conveniently increase and decrease the arm of force in a flexible way, simultaneously can adjust the pedal still of cushion not adjusting, in order to reach perfect coordination and unification, general one person uses the words, need not transfer after transferring, suit different motorcycle types, different crowds, also be applicable to the repacking of original bicycle, save time, laborsaving;

3. the crank device of the utility model keeps the length of the crank cantilever unchanged, the crank is connected with the bracket through the second bolt, and the distance between the pedal shaft and the crank shaft is changed by increasing the bracket, so that the use requirements of different vehicle types and different people are met;

4. a bicycle, through adjusting part adjusts the pedal axle with distance between the crank axle still can satisfy the long crowd of different legs and ride well under the condition of not adjusting the saddle, the whole focus of people's car system is roughly unchangeable simultaneously, rides also more steadily, this bicycle simple structure, convenient to use, respond well.

Drawings

FIG. 1 is a schematic view of a prior art bicycle crank structure;

FIG. 2 is a schematic structural view of the crank device described in embodiment 1;

FIG. 3 is a first schematic view of the structure of the crank device according to embodiment 2;

FIG. 4 is a second schematic structural view of the crank device according to embodiment 2;

FIG. 5 is a third schematic structural view of the crank device according to embodiment 2;

FIG. 6 is a schematic structural view of the bicycle described in embodiment 3.

The labels in the figure are: 1-crank, 2-pedal shaft, 3-pedal, 4-elbow, 41-first bolt, 42-first screw, 5-second bolt, 51-first through hole, 52-second through hole.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

As shown in fig. 2, a crank device, including crank 1, connect through adjusting part between 1 cantilever of crank and the bicycle pedal axle 2, adjusting part is used for adjusting pedal axle 2 is relative the distance of 1 axle of crank, adjusting part includes a plurality of elbow 4.

Elbow 4 is U type structure or L type structure, adopts in this embodiment as shown in fig. 2 to 4U type structure, pedal axle 2 is L type structure, every the one end length of elbow 4 is unanimous, and other end length is all inconsistent, the one end of elbow 4 through first bolt 41 connect in 1 cantilever tip of crank, the other end of elbow 4 through first screw 42 connect in pedal axle 2.

In a specific embodiment, the crank 1 is cantilevered 170mm long, and the height difference of one of the elbows 4 is 30mm as shown in FIG. 2.

In a particular embodiment, the crank 1, the elbow 4 and the pedal shaft 2 are integrally formed components.

The crank device of the utility model keeps the cantilever length of the crank 1 unchanged, and by adding the elbows 4 with different models, the pedals 3 on the pedal shaft 2 are adjusted to different lengths, so that people with different leg lengths can still well ride without adjusting the bicycle cushion, and the requirements of different bicycle types are also met; meanwhile, the whole gravity center of the man-vehicle system is approximately unchanged, the riding is more stable, and the crank device is simple in structure, convenient to use and good in effect.

Example 2

As shown in fig. 3 to 5, a crank device according to the present invention is different from embodiment 1 in that, in this embodiment, the adjusting component includes a bracket, a first through hole 51 formed at a cantilever end of the crank 1, and a second through hole 52 formed in the bracket, and a cantilever length of the crank 1 is equal to a length of the bracket.

The leg joint pedal axle 2, the support is on a parallel with 1 cantilever setting of crank, first through-hole 51 includes two, follows 1 cantilever length direction interval of crank sets up, and the interval is 20mm for L, second through-hole 52 includes four, second through-hole 52 is followed support length direction equidistance L interval sets up, first through-hole 51 pass through second bolt 5 and correspond second through-hole 52 can dismantle the connection.

The four second through holes 52 are three L-shaped, so that the bracket is connected with the cantilever of the crank 1 to form three adjustable gears, the pedal shaft 2 is enabled to have three adjustable distances relative to the crank 1, and the use of people with different leg lengths is met.

Application a crank device, keep 1 cantilever length of crank unchangeable, crank 1 with the support passes through second bolt 5 is connected, through increasing the support changes pedal axle 2 with distance between the crank 1 axle still can satisfy different long crowds of leg and ride well under the condition of not adjusting the saddle, also satisfy different motorcycle type demands, the whole focus of people's car system is roughly unchangeable simultaneously, it is also more steady to ride, this crank device simple structure, convenient to use, respond well.

Example 3

As shown in fig. 6, a bicycle, including frame, handle, front wheel, rear wheel, chain, brake, still include as embodiment 1 or embodiment 2 crank device, crank device rotates and sets up on the frame, crank device passes through the chain connect in the rear wheel, 2 overcoat of pedal axle are equipped with pedal 3.

Application a bicycle, through adjusting part adjusts pedal axle 2 with distance between 1 axles of crank still can satisfy different long crowds of leg and ride well under the condition of not adjusting the saddle, the whole focus of people's car system is roughly unchangeable simultaneously, rides also more steadily, this bicycle simple structure, convenient to use, respond well.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A crank device comprises a crank (1) and is characterized in that a cantilever of the crank (1) is connected with a pedal shaft (2) of a bicycle through an adjusting part, the adjusting component is used for adjusting the distance between the pedal shaft (2) and the crank (1), the adjusting component comprises a bracket, a first through hole (51) arranged at the cantilever end part of the crank (1) and a second through hole (52) arranged on the bracket, the bracket is connected with the pedal shaft (2) and is used for being arranged in parallel with the crank (1) in a cantilever way, the first through holes (51) comprise two through holes which are arranged at intervals along the length direction of a cantilever of the crank (1) at an interval of L, the number of the second through holes (52) is at least three, the second through holes (52) are arranged at equal intervals L along the length direction of the bracket, the first through holes (51) are detachably connected with the corresponding second through holes (52) through second bolts (5).

2. A crank arrangement according to claim 1, characterized in that the second through holes (52) comprise four.

3. A crank arrangement according to claim 1, characterized in that the crank (1) cantilever length is equal to the bracket length.

4. Bicycle comprising a frame, a handlebar, a front wheel, a rear wheel, a chain, brakes, characterized in that it further comprises a crank device according to any of claims 1-3, said crank device being rotatably arranged on said frame, said crank device being connected to said rear wheel via said chain, said pedal shaft (2) being externally fitted with pedals (3).