CN205652280U - Last gear structure of speed -changing bicycle - Google Patents

Abstract

The utility model provides a last gear structure of speed -changing bicycle belongs to mechanical transmission technical field. It has solved technical problem such as current last gear structure of speed -changing bicycle is with high costs, the assembly is inconvenient. This gear structure includes the gear no. 1 that the radius reduces in proper order, gear no. 2 and gear no. 3, gear no. 1, gear no. 2 is the ring -type that the middle part has the through -hole with gear no. 3, gear no. 1, gear no. 2, it do not is equipped with a plurality of protruding edges no. 1 to equally divide along circumference on the through -hole inner wall of gear no. 3, protruding edge no. 2 and protruding edge no. 3, the both ends that are equipped with long banding connecting piece no. 1 and connecting piece no. 1 on the protruding edge no. 1 link firmly with the side and the protruding edge no. 1 of gear no. 2 respectively mutually, the both ends that are equipped with long banding connecting piece no. 2 and connecting piece no. 2 on the protruding edge no. 2 link firmly along the two -phase with the side of gear no. 3 and protruding respectively, the mounting panel has been linked firmly on the protruding edge no. 3. Gear among this gear structure no. 1, gear no. 2 and gear no. 3 be machine -shapings respectively, then couple together the three through connecting piece no. 1 and connecting piece no. 2, and production is simple, and the assembly is swift.

Description

A kind of gear structure on multi-speed bicycle

Technical field

This utility model belongs to machine driving device technical field, relates to a kind of gear structure, A kind of gear structure on multi-speed bicycle.

Background technology

Gear is to have tooth on wheel rim and can engage the machinery unit of transmitting movement and power continuously Part, has the advantages such as transmission efficiency is high, gear ratio is accurate, power bracket is big, and gear is also Can by with other machine components engaged transmission, it is achieved change rotating speed and moment of torsion, change The functions such as the direction of motion and change forms of motion；Gear mechanism extensively should in industrial products With, its design and manufacture level directly influence the quality of industrial products.By two gears Separately, chain, crawler belt, belt can be applied driving the gear on both sides and transmit power.

Bicycle is the vehicles of the environmental protection with foot pedal as power, pedal portion Part is assemblied on the left and right crank of middle axle, is one and translation power is converted into rotatory force Device, during cycling, first pedal force passes to pedal parts, then by foot Pedal axle rotating crank, coordinate transmission by gear structure and chain, make rear wheel, So that bicycle advances.Therefore pedal parts and gear structure are the most suitable, will be straight Can connect affects the driving of bicycle and be smoothed out and the comfort of cyclist.

China's patent (notification number: CN201545159U；Publication date: 2010-08-11) Disclose a kind of improved mechanism for bearingless clutch of bicycle transmission gearset, bicycle Rear change gear train at least has two gears, and outermost is the first gear, in it is adjacent Side is the second gear, has continuous action relation, the first gear and the between the second gear and flower hub Two gears are same outer diameter and the identical number of teeth, and are provided with between outermost the first gear and flower hub The becket that one energy is freely rotatable；Dialling chain speed change when operation makes chain turning set to outermost During the first gear, because of between this first gear and flower hub without continuous action relation, therefore trailing wheel is not for be subject to The "Off" state that chain-driving rotates, and group chain speed change ought be operated again chain is rotated Recover the second adjacent gear when becoming " conjunction " state, because first, second tooth Wheel has same outer diameter and the identical number of teeth, so the action rotated can be under low running velocity It is readily accomplished.

Gear structure production difficulty in above-mentioned patent is big and assembling is complicated, and production cost is high.

Summary of the invention

The problems referred to above that this utility model exists for existing technology, it is provided that a kind of speed change Gear structure on bicycle, technical problem to be solved in the utility model is: how A kind of gear structure that can reduce cost and quick assembling is provided.

This utility model purpose can be realized by following technical proposal:

Gear structure on a kind of multi-speed bicycle, described gear structure includes that radius is successively Gear one, gear two and the gear three reduced, it is characterised in that described gear one, tooth Wheel two and gear three are middle part and have the ring-type of through hole, the through-hole wall of described gear one On circumferentially arranged with some convex edges one, on the through-hole wall of described gear two circumferentially arranged with Some convex edges two, circumferentially arranged with some convex edges three on the through-hole wall of described gear three, Described convex edge one is provided with the connector one of strip and the two ends difference of described connector one Being fixedly connected with side and the convex edge one of described gear two, described convex edge two is provided with strip Connector two and described connector two two ends respectively with the side of described gear three and convex It is fixedly connected with along two, described convex edge three is fixed with the peace of the through hole being positioned at described gear three Dress plate, described installing plate offers connecting hole.

Its principle is as follows: the gear structure in the technical program is arranged on the foot on bicycle Pedaling part, be connected with the crank with pedal, pedal is provided in this gear knot Structure both sides, two pedals are connected by crank, and this crank is located in the company of installing plate Connect in hole and fix with installing plate and be connected, step tread rotating crank, it becomes possible to drive this Gear structure rotate, then by with chain coordinate transmission, make the rear wheel of bicycle, So that bicycle advances.Bicycle in the technical program is provided with three different radiis Gear, coordinates transmission with gear one, gear two and gear three respectively by chain, it is achieved Different gear ratios such that it is able to realize the gear one in three-step gear shift, this gear structure, Gear two and gear three machine-shaping respectively, then will by connector one and connector two Three couples together, and produces simple, and assembling is quick.Gear one, gear two and gear three Middle part be respectively provided with through hole, it is possible to save material, simultaneously by arranging convex edge one, convex edge Two and convex edge three be easy to being connected of connector one, connector two and installing plate, and improve The firm steadiness connected.

In gear structure on above-mentioned multi-speed bicycle, described convex edge one is along gear one Through-hole wall circumference uniform intervals distribution, described convex edge two is along the through-hole wall of gear two Circumference uniform intervals distribution, described convex edge three along gear three through-hole wall circumference uniformly between Every distribution.Step tread rotating crank, drives this gear structure to rotate, and the transmission of power is Successively from pedal to, crank, installing plate again to gear three, gear two and gear one, When the chain coordinated with this gear mechanism on bicycle is meshed with gear one, the biography of power Defeated farthest, and the transmission of moment of torsion can make to produce on connector one, connector two to cut along gear The shearing force in line direction, easily causes fracture or the damage of this gear structure, and uniform intervals divides Cloth convex edge one, convex edge two and convex edge three can be uniformly distributed transmission torque, improve this gear The service life of structure.

In gear structure on above-mentioned multi-speed bicycle, described convex edge one, convex edge two It is four and described convex edge one, convex edge two and convex edge 31 a pair with the quantity of convex edge three Should arrange.Corresponding convex edge one, convex edge two and convex edge three are positioned on straight line, make Obtain corresponding connector one and connector two also is located on straight line, so in moment In transmission, more directly quick, reduce turnover, increase intensity, improve service life.

In gear structure on above-mentioned multi-speed bicycle, the two ends of described connector one Side and convex edge one phase with described gear two rivet respectively, the two ends of described connector two Side and convex edge two-phase with described gear three rivet respectively.The fastest by riveting method Prompt, it is not easy to come off, assemble convenient firmly.

In gear structure on above-mentioned multi-speed bicycle, described gear one is convex with described One-body molded along one, described gear two is one-body molded with described convex edge two, described gear three One-body molded with described convex edge three and installing plate.Gear one, gear two and gear three are equal Can use punching press or casting, gear one and convex edge one, gear two and convex edge two, Gear three all uses one-body molded with convex edge three, it is possible to Simplified flowsheet so that production cost Reduce, ensure fixed simultaneously.

In gear structure on above-mentioned multi-speed bicycle, described gear one, gear two Uniformly successively decrease with the radius of gear three.The number of gear structure middle gear is limited, tooth Wheel number is the most, designs the most complicated, and manufacturing cost is the highest, from economy in the technical program Angle, practical standpoint etc. consider employing three class gear shift, use tooth in the technical program Wheel one, gear two and three or three various sizes of gears of gear realize high, normal, basic three kinds of regulations Speed, the radius of gear one, gear two and gear three uniformly successively decreases, it is also possible to make Even variation on gear ratio, thus realize three kinds of friction speed patterns, meet user Demand.

Compared with prior art, the gear structure on multi-speed bicycle in this utility model Three gear machine-shapings respectively, are then connected three by connector one and connector two Picking up, produce simple, assembling is quick.Gear one, gear two and the middle part of gear three It is respectively provided with through hole, it is possible to save material, simultaneously by arranging convex edge one, convex edge two and convex It is easy to being connected of connector one, connector two and installing plate along three, and improves connection Firm steadiness.

Accompanying drawing explanation

Fig. 1 is this gear structure use structural representation on multi-speed bicycle.

Fig. 2 is the perspective view of this gear structure.

In figure, 1, gear one；2, gear two；3, gear three；4, through hole；5, convex Along one；6, convex edge two；7, convex edge three；8, connector one；9, connector two；10、 Installing plate；11, connecting hole；12, pedal；13, crank.

Detailed description of the invention

The following is specific embodiment of the utility model and combine accompanying drawing, to this utility model Technical scheme be further described, but this utility model is not limited to these embodiments.

As depicted in figs. 1 and 2, the gear structure on this multi-speed bicycle includes that radius depends on The gear 1 of secondary reduction, gear 22 and gear 33, gear 1, gear 22 and Gear 33 is middle part and has the ring-type of through hole 4, on through hole 4 inwall of gear 1 Circumferentially arranged with some convex edges 1, on through hole 4 inwall of gear 22 circumferentially arranged with Some convex edges 26, circumferentially arranged with some convex edges 37 on through hole 4 inwall of gear 33, Convex edge 1 be provided with the two ends of the connector 1 of strip and connector 1 respectively with The side of gear 22 rivets mutually with convex edge 1, and convex edge 26 is provided with the company of strip The two ends of fitting 29 and connector 29 respectively with side and the convex edge 26 of gear 33 Rivet mutually, convex edge 37 be fixed with the installing plate 10 of the through hole 4 being positioned at gear 33, Connecting hole 11 is offered on installing plate 10.

As in figure 2 it is shown, convex edge 1 along gear 1 through hole 4 inwall circumference uniformly between Every distribution, convex edge 26 is distributed along the through hole 4 inwall circumference uniform intervals of gear 22, Convex edge 37 is distributed along the through hole 4 inwall circumference uniform intervals of gear 33；Convex edge 1, The quantity of convex edge 26 and convex edge 37 is four and convex edge 1, convex edge 26 and convex Arrange along 37 one_to_one corresponding, corresponding convex edge 1, convex edge 26 and convex edge 37 It is positioned on straight line so that corresponding connector 1 and connector 29 also are located at On straight line.

Gear structure in the technical program is arranged on the pedal part on bicycle, with tool The crank 13 having pedal 12 is connected, and pedal 12 is provided in this gear structure two Side, two pedals 12 are connected by crank 13, and this crank 13 is located in installing plate Fixing in the connecting hole 11 of 10 and with installing plate 10 and be connected, step tread 12 rotates song Handle 13, it becomes possible to drive this gear structure to rotate, then by with chain coordinate transmission, Make the rear wheel of bicycle, so that bicycle advances.In the technical program voluntarily Car is provided with the gear of three different radiis, by chain respectively with gear 1, gear 22 Transmission is coordinated, it is achieved different gear ratio such that it is able to realize three grades of changes with gear 33 Speed, gear 1, gear 22 and gear 33 in this gear structure are processed into respectively Type, is then coupled together three by connector 1 and connector 29, passes through riveting Connect mode simple and fast, it is not easy to come off, assemble convenient firmly.Gear 1, The middle part of gear 22 and gear 33 is respectively provided with through hole 4, it is possible to save material, simultaneously It is easy to connector 1, connector by arranging convex edge 1, convex edge 26 and convex edge 37 29 and being connected of installing plate 10, and improve the firm steadiness of connection.

Step tread 12 rotating crank 13, drives this gear structure to rotate, the transmission of power Be successively from pedal 12 to, crank 13, installing plate 10 be again to gear 33, gear two 2 and gear 1 on, when the chain coordinated with this gear mechanism on bicycle and gear One 1 when being meshed, and the transmission of power is farthest, and the transmission of moment of torsion can make connector 1, Produce the shearing force along gear tooth tangent direction on connector 29, easily cause this gear structure Fracture or damage, uniform intervals distribution convex edge 1, convex edge 26 and convex edge 37 energy Enough it is uniformly distributed transmission torque, improves the service life of this gear structure.

The present embodiment middle gear 1 is one-body molded with convex edge 1, gear 22 and convex edge 26 is one-body molded, and gear 33 is one-body molded with convex edge 37 and installing plate 10；Tooth Take turns one 1, gear 22 and gear 33 and all can use punching press or casting, gear One 1 all adopt with convex edge 37 with convex edge 26, gear 33 with convex edge 1, gear 22 With one-body molded, it is possible to Simplified flowsheet so that production cost reduces, ensure fixing simultaneously Firm；The radius of gear 1, gear 22 and gear 33 uniformly successively decreases；Gear is tied The number of structure middle gear is limited, and number of gears is the most, designs the most complicated, is manufactured into This is the highest, in the technical program economically, practical standpoint etc. consider employing three Shelves speed change, uses gear 1, gear 22 and gear 333 in the technical program Various sizes of gear realizes high, normal, basic three kinds of governing speeds, gear 1, gear 22 Uniformly successively decrease with the radius of gear 33, it is also possible to make even variation on gear ratio, Thus realize three kinds of friction speed patterns, meet the demand of user.

Specific embodiment described herein is only for example to this utility model spirit Explanation.This utility model person of ordinary skill in the field can be to described concrete Embodiment is made various amendment or supplements or use similar mode to substitute, but not Spirit of the present utility model can be deviateed or surmount model defined in appended claims Enclose.

Although the most more employing 1, gear one；2, gear two；3, gear three； 4, through hole；5, convex edge one；6, convex edge two；7, convex edge three；8, connector one；9、 Connector two；10, installing plate；11, connecting hole；12, pedal；13, the art such as crank Language, but it is not precluded from using the probability of other term.These terms are used to be only Describe and explain essence of the present utility model more easily；It is construed as any one It is all contrary with this utility model spirit for planting additional restriction.

Claims (6)

1. the gear structure on multi-speed bicycle, described gear structure includes that radius depends on The gear one (1) of secondary reduction, gear two (2) and gear three (3), it is characterised in that Described gear one (1), gear two (2) and gear three (3) are middle part and have through hole (4) ring-type, the through hole (4) of described gear one (1) if on inwall circumferentially arranged with Dry convex edge one (5), on through hole (4) inwall of described gear two (2) circumferentially arranged with Some convex edges two (6), through hole (4) inwall of described gear three (3) circumferentially sets Some convex edges three (7), described convex edge one (5) is had to be provided with the connector one (8) of strip And the two ends of described connector one (8) respectively with the side of described gear two (2) and convex Being fixedly connected with along one (5), described convex edge two (6) is provided with the connector two (9) of strip And the two ends of described connector two (9) respectively with the side of described gear three (3) and convex It is fixedly connected with along two (6), described convex edge three (7) is fixed with and is positioned at described gear three (3) Through hole (4) in installing plate (10), described installing plate offers connection on (10) Hole (11).

Gear structure on a kind of multi-speed bicycle the most according to claim 1, its Being characterised by, described convex edge one (5) is along through hole (4) the inwall circumference of gear one (1) Uniform intervals is distributed, and described convex edge two (6) is along through hole (4) inwall of gear two (2) Circumference uniform intervals distribution, described convex edge three (7) is along the through hole (4) of gear three (3) Inwall circumference uniform intervals is distributed.

Gear structure on a kind of multi-speed bicycle the most according to claim 2, its It is characterised by, described convex edge one (5), convex edge two (6) and the quantity of convex edge three (7) It is four and described convex edge one (5), convex edge two (6) and convex edge three (7) 1 a pair Should arrange.

4. according to the gear on a kind of multi-speed bicycle described in claim 1 or 2 or 3 Structure, it is characterised in that the two ends of described connector one (8) respectively with described gear two (2) side rivets mutually with convex edge one (5), and the two ends of described connector two (9) are divided Not side and convex edge two (6) with described gear three (3) rivets mutually.

5. according to the gear on a kind of multi-speed bicycle described in claim 1 or 2 or 3 Structure, it is characterised in that described gear one (1) becomes with described convex edge one (5) one Type, described gear two (2) is one-body molded with described convex edge two (6), described gear three (3) one-body molded with described convex edge three (7) and installing plate (10).

6. according to the gear on a kind of multi-speed bicycle described in claim 1 or 2 or 3 Structure, it is characterised in that described gear one (1), gear two (2) and gear three (3) Radius uniformly successively decrease.