CN213473437U - Bicycle - Google Patents

Abstract

Embodiments of the present disclosure provide a bicycle. The bicycle comprises a frame, a rear wheel, a flywheel, a chain wheel, a chain and a chain tensioner, wherein the rear wheel is rotatably arranged at the rear part of the frame, a rear wheel shaft is arranged at the center of the rear wheel, the flywheel is sleeved on the rear wheel shaft, the chain wheel is rotatably arranged on the frame, the chain is wound on the flywheel and the chain wheel in a spanning mode, the chain tensioner is detachably arranged on the frame, the chain tensioner is located between the flywheel and the chain wheel and close to the rear wheel, and the chain tensioner is configured into a follow-up section capable of tensioning the chain. Through the arrangement, the chain tensioning device can tension the chain, so that the chain is prevented from falling off from the chain wheel and the flywheel, and safety accidents are avoided.

Description

Bicycle

Technical Field

The embodiment of the disclosure relates to a vehicle technology, in particular to a bicycle.

Background

In order to reduce environmental pollution, people tend to ride a bicycle when going out. The shared bicycle provides a convenient bicycle sharing service for people, and is particularly favored by people.

The bicycle comprises a frame, a front wheel, a rear wheel and a driving device, wherein a shaft hole is formed in the middle of the frame, a rear wheel shaft is arranged at the wheel center of the rear wheel, the driving device comprises pedals, pedal cranks, a pedal middle shaft, a chain wheel, a flywheel and a chain, the pedal middle shaft is installed in the shaft hole, the chain wheel is sleeved on the pedal middle shaft, one end of each pedal crank is connected with the pedal middle shaft, the other end of each pedal crank is connected with the corresponding pedal, the flywheel is sleeved on the rear wheel shaft, and the chain is wound on the flywheel and the chain wheel in a.

In the process of implementing the present invention, the inventor finds that at least the following problems exist in the conventional technology: when the bicycle is used as a sharing bicycle, the sharing bicycle is often moved and transported, and thus the sharing bicycle is subjected to more collisions and impacts than a private bicycle, resulting in easy detachment of the chain from the chain wheel and the flywheel. If the user rides the in-process of sharing bicycle, the chain drops, probably causes the incident.

SUMMERY OF THE UTILITY MODEL

The embodiment of the disclosure provides a bicycle, which is used for solving the problem that safety accidents are caused by the fact that a chain falls off in the process of riding the shared bicycle by a user.

An embodiment of the present disclosure provides a bicycle, including: a frame; the rear wheel is rotatably arranged at the rear part of the frame, and a rear wheel shaft is arranged at the wheel center of the rear wheel; the flywheel is sleeved on the rear wheel shaft; the chain wheel is rotatably arranged on the frame; the chain is wound on the flywheel and the chain wheel in a spanning mode; the chain stretching device is detachably mounted on the frame, is located between the flywheel and the chain wheel and is close to the rear wheel, and is configured to be capable of tensioning the follow-up section of the chain.

The bicycle as described above, wherein the frame is provided with a rear fork, and the rear wheel is mounted on the rear fork.

The bicycle as described above, wherein the rear fork includes a left rear fork beam and a right rear fork beam, and the rear wheel is rotatably mounted between the left rear fork beam and the right rear fork beam.

The bicycle as described above, wherein the flywheel is located between the right rear fork beam and the rear wheel; the chain expanding device is fixed on the right rear fork beam and is positioned between the right rear fork beam and the rear wheel.

The bicycle as described above, wherein the chain tensioner includes a first wheel-like component, a second wheel-like component, and a tooth-like component, the tooth-like component cooperating with the chain to enable tensioning of the following segment of the chain.

The bicycle is characterized in that a first threaded hole is formed in the frame, a second threaded hole is formed in the first wheel-shaped component, the first threaded hole and the second threaded hole are coaxial, and the chain tensioner and the frame are detachably connected through a bolt screwed in the first threaded hole and the second threaded hole.

The bicycle provided by the embodiment of the disclosure comprises a frame, a rear wheel, a flywheel, a chain wheel, a chain and a chain tensioner, wherein the rear wheel is rotatably arranged at the rear part of the frame, a rear wheel shaft is arranged at the center of the rear wheel, the flywheel is sleeved on the rear wheel shaft, the chain wheel is rotatably arranged on the frame, the chain is wound on the flywheel and the chain wheel in a spanning mode, the chain tensioner is detachably arranged on the frame, the chain tensioner is positioned between the flywheel and the chain wheel and close to the rear wheel, and the chain tensioner is configured into a follow-up section capable of tensioning the chain. Through the arrangement, the chain tensioning device can tension the chain, so that the chain is prevented from falling off from the chain wheel and the flywheel, and safety accidents are avoided.

Various possible embodiments of the present disclosure and technical advantages thereof will be described in detail below.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

FIG. 1 is a left side view of a bicycle in accordance with an embodiment of the present disclosure;

FIG. 2 is a right side view of a bicycle in accordance with an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a chain tensioner according to an embodiment of the disclosure;

FIG. 4 is a structural cross-sectional view of a chain tensioner of an embodiment of the present disclosure;

FIG. 5 is an exploded schematic view of a front frame and a rear frame of an embodiment of the present disclosure;

FIG. 6 is a schematic connection diagram of a rear frame, a chain wheel, a flywheel, a chain and a chain tensioner according to an embodiment of the disclosure;

fig. 7 is an exploded schematic view of a rear frame, a chain wheel, a flywheel, a chain and a chain tensioner according to an embodiment of the disclosure.

Reference numerals:

100: a bicycle;

1: a frame; 11: a front fork; 12: a front frame; 13: a rear frame; 131: a rear half-beam; 132: a rear fork; 1321: a left rear fork beam; 1322: a right rear fork beam;

2: a front wheel;

3: a rear wheel;

4: a drive device; 41: a pedal middle shaft; 42: pedaling; 43: a pedal crank; 44: a chain; 45: a chain wheel; 46: a flywheel;

5: a seat tube;

6: a vehicle seat;

7: a handlebar;

8: a chain stretching device; 81: a first wheel-like component; 82: a second wheel-like component; 83: a toothed member;

9: and (4) bolts.

With the foregoing drawings in mind, certain embodiments of the disclosure have been shown and described in more detail below. These drawings and written description are not intended to limit the scope of the disclosed concepts in any way, but rather to illustrate the concepts of the disclosure to those skilled in the art by reference to specific embodiments.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The bicycle comprises a frame, a front wheel, a rear wheel and a driving device, wherein a shaft hole is formed in the middle of the frame, a rear wheel shaft is arranged at the wheel center of the rear wheel, the driving device comprises pedals, pedal cranks, a pedal middle shaft, a chain wheel, a flywheel and a chain, the pedal middle shaft is installed in the shaft hole, the chain wheel is sleeved on the pedal middle shaft, one end of each pedal crank is connected with the pedal middle shaft, the other end of each pedal crank is connected with the corresponding pedal, the flywheel is sleeved on the rear wheel shaft, and the chain is wound on the flywheel and the chain wheel in a. However, when the bicycle is used as a sharing bicycle, the sharing bicycle is often moved and transported, and thus the sharing bicycle is subjected to more impacts and shocks than a private bicycle, resulting in a chain easily falling off from the chain wheel and the flywheel. If the user rides the in-process of sharing bicycle, the chain drops, probably causes the incident.

In view of this, the embodiment of the present disclosure provides a bicycle, which includes a chain tensioner, wherein the chain tensioner is detachably mounted on a frame and is disposed close to a rear wheel, and the chain tensioner can tension a following section of a chain, thereby being beneficial to preventing the chain from falling off from a chain wheel and a flywheel, and further being beneficial to preventing safety accidents.

The following describes technical solutions of the embodiments of the present disclosure and how to solve the above technical problems with specific embodiments. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments. Embodiments of the present disclosure will be described below with reference to the accompanying drawings.

Fig. 1 is a left side view of a bicycle according to an embodiment of the present disclosure, and fig. 2 is a right side view of the bicycle according to the embodiment of the present disclosure. As shown in fig. 1 and 2, an embodiment of the present disclosure provides a bicycle 100, the bicycle 100 includes a frame 1, and a front wheel 2, a rear wheel 3, a seat 6, a handle bar 7 and a driving device 4 mounted on the frame 1, the frame 1 providing support for the front wheel 2, the rear wheel 3, the seat 6, the handle bar 7 and the driving device 4. The driving device 4 is used for driving the front wheels 2 and the rear wheels 3 to rotate, so as to drive the bicycle 100 to run to a destination; the seat 6 is used for a rider to sit; the handlebar 7 is intended to be gripped by a rider.

Specifically, the bicycle frame 1 includes a front frame 12 and a rear frame 13, a front tube is formed at the front end of the front frame 12, the bicycle 100 further includes a front fork 11, the top end of the front fork 11 is rotatably assembled in the front tube, and the bottom end of the handlebar 7 is rotatably assembled in the front tube and connected with the front fork 11. The wheel center of the front wheel 2 is provided with a front wheel shaft which is arranged at the bottom end of the front fork 11, so that the front wheel 2 can be rotatably arranged on the front fork 11. During riding, the rider operates the handlebar 7 to rotate and thus the front fork 11 to rotate, so that the front fork 11 rotates around the axis of the front tube, the orientation of the front wheel 2 changes accordingly, and the driving direction of the bicycle 100 is changed.

The rear frame 13 is provided with a seat post in the middle of the bicycle 100, the seat post is a hollow tube, and the seat post and the front frame 12 jointly enclose a riding space for a rider to place articles and the rider to get on or off the bicycle conveniently. The seat post of the hollow tube is inserted with the seat tube 5 of the bicycle 100, and the top end of the seat tube 5 is connected with the saddle 6 for the rider to ride. The rear frame 13 is further connected with a rear fork 132, the rear fork 132 extends toward the rear of the bicycle 100, a rear wheel shaft is arranged at the wheel center of the rear wheel 3, and the rear wheel shaft is arranged on the rear fork 132, so that the rear wheel 3 can be rotatably mounted on the rear fork 132.

When the bicycle 100 is a manual bicycle, the driving device 4 may include a pedal middle shaft 41, pedals 42, a pedal crank 43, a chain wheel 45, a flywheel 46 and a chain 44; the pedal middle shaft 41 is arranged on the frame 1, the chain wheel 45 is sleeved on the pedal middle shaft 41, the chain wheel 45 is also connected with one end of a pedal crank 43, and the other end of the pedal crank 43 is connected with the pedals 42; the flywheel 46 is fitted over the rear wheel shaft, and the chain 44 is wound around the chain wheel 45 and the flywheel 46, the chain wheel 45 and the flywheel 46 being configured to be rotatable at least in a predetermined direction.

When riding, a user of the shared bicycle 100 steps on the pedals 42 to drive the pedal crank 43 to rotate relative to the frame 1, and further drive the chain wheel 45 connected with the pedal crank 43 to rotate towards a preset direction, the chain wheel 45 drives the flywheel 46 to rotate towards the preset direction through the chain 44, the rear wheel 3 is driven by the flywheel 46 to rotate around the rear wheel shaft, and the front wheel 2 also rotates along with the rear wheel shaft, so that the shared bicycle 100 moves forwards. It is understood that the pedals 42 and pedal cranks 43 of the driving device 4 may be replaced with motors when the bicycle 100 is an electric bicycle 100.

In the process of rotating the chain wheel 45 in the predetermined direction, a section of the chain 44 which gradually moves toward the chain wheel 45 and then engages with the chain wheel 45 is a driving section. The driving section directly receives the driving force from the chain wheel 45, and the flywheel 46 is driven to rotate. In contrast, a portion of the chain 44 which gradually moves away from the chain wheel 45 and then engages with the flywheel 46 is a follower portion, and the follower portion is not directly subjected to the driving force. In the example shown in fig. 2, the rotation of the chain wheel 45 in the predetermined direction means that the chain wheel 45 rotates along the pointer, and the portion of the chain 44 located above the chain wheel 45 is the driving end, and the portion of the chain 44 located below the chain wheel 45 is the following end.

Fig. 3 is a schematic structural view of a chain tensioner according to an embodiment of the disclosure, and fig. 4 is a sectional structural view of the chain tensioner according to an embodiment of the disclosure. In the embodiment, the bicycle 100 further comprises a chain tensioner 8, and the chain tensioner 8 is used for tensioning the chain 44, so that the danger caused by the chain 44 falling off from the chain wheel 45 or the flywheel 46 is reduced.

Specifically, the chain tensioner 8 is detachably mounted on the frame 1, and the chain tensioner 8 is positioned between the flywheel 46 and the chain wheel 45 and is arranged close to the rear wheel 3. As shown in fig. 3 and 4, the chain tensioner 8 is configured to tension the following strand of the chain 44. That is, the chain tensioner 8 engages with the following strand of the chain 44 and applies a force to the following strand, causing the following strand to be tensioned.

Through the arrangement, the chain tensioner 8 provided by the embodiment can tighten the chain 44, and further can prevent the chain 44 from falling off from the chain wheel 45 and the flywheel 46, so that the safety accident can be avoided. This configuration is particularly suitable for sharing bicycle 100 because sharing bicycle 100 often needs to be moved and transported, sharing bicycle 100 can receive more collisions and impacts than private bicycle, and in this way, sharing bicycle 100's chain 44 is not easy to fall off, thereby being beneficial to improving the safety of riding of the user.

Fig. 5 is an exploded schematic view of a front frame and a rear frame according to an embodiment of the present disclosure. As shown in fig. 5, the front frame 12 includes a front oblique beam and a front half beam which are integrally formed, the rear frame 13 includes a rear half beam 131 and a rear fork 132 which are integrally formed, and the front end of the rear half beam 131 and the rear end of the front half beam are in mortise and tenon joint. Therefore, the front frame 12 and the rear frame 13 are skillfully combined together, and compared with the direct screw connection of the front frame and the rear frame, the front frame and the rear frame are favorable for avoiding the occurrence of distortion. Wherein the seat post is specifically formed on the rear half beam 131 of the rear frame 13, and the rear fork 132 is integrally formed with the rear half beam 131.

Further, the rear fork 132 includes a left rear fork 1321 and a right rear fork 1322, the left rear fork 1321 and the right rear fork 1322 are bifurcated, and the rear wheel 3 is rotatably disposed between the left rear fork 1321 and the right rear fork 1322. The left back fork beam 1321 and the right back fork beam 1322 are plate-shaped structures, and the left back fork beam 1321 is provided with a left lightening hole, and the right back fork beam 1322 is provided with a right lightening hole. Thus, the rear fork 132 can have a higher structural strength, so that the weight can be reduced, and the rear frame 13 and the whole bicycle 100 can be reduced in weight to facilitate riding. For the shared bicycle 100, the user of the shared bicycle 100 can have a good experience.

In order to reduce the weight of the vehicle frame 1 as much as possible, the lightening holes may be appropriately provided according to the shape of the rear fork 132 to increase the lightening holes as much as possible. Illustratively, as shown in fig. 5, the longitudinal cross-sectional area of the left rear fork beam 1321 gradually decreases from the front to the rear, that is, the longitudinal cross-sectional area of the left lightening hole gradually decreases from the front to the rear when the left rear fork beam 1321 gradually shrinks toward the rear axle. Similarly to the right lightening hole, the longitudinal sectional area of the right rear fork beam 1322 is gradually reduced from the front to the rear, that is, the longitudinal sectional area of the right lightening hole is gradually reduced from the front to the rear when the right rear fork beam 1322 is gradually contracted toward the rear axle.

Fig. 6 is a schematic connection diagram of the rear frame, the chain wheel, the flywheel, the chain and the chain tensioner according to the embodiment of the disclosure, and fig. 7 is an exploded schematic diagram of the rear frame, the chain wheel, the flywheel, the chain and the chain tensioner according to the embodiment of the disclosure. In the example shown in fig. 6 and 7, the flywheel 46 is provided between the right rear fork beam 1322 and the rear wheel 3, and the chain 44 extends from the outer side of the right rear fork beam 1322 into the right rear fork beam 1322. Wherein, the chain expanding device 8 is also fixed on the right back fork beam 1322 and is positioned between the right back fork beam 1322 and the back wheel 3.

In this embodiment, the rear fork 132 of the frame 1 is provided with a mounting hole, and the rear axle is inserted into the mounting hole, so that the rear fork 132 is sleeved on the rear axle. This improves the reliability of connection between the rear fork 132 and the vehicle body frame 1, and allows the rear fork 132 to be more stably attached to the vehicle body frame 1.

Preferably, the frame 1 may be made of magnesium alloy, aluminum alloy, or carbon fiber. The frame 1 made of carbon fiber is lighter in weight, and the bicycle 100 as a whole is lighter in weight, so that the rider can ride easily with less effort.

As shown in fig. 3 and 4, the chain tensioner 8 includes a first wheel-shaped component 81, a second wheel-shaped component 82, and a tooth-shaped component 83, the tooth-shaped component 83 is rotatably mounted on the second wheel-shaped component 82, and the tooth-shaped component 83 cooperates with the chain 44 to tension the following segment of the chain 44.

A first threaded hole is formed in the frame 1, a second threaded hole is formed in the first wheel-shaped component 81, the first threaded hole and the second threaded hole are coaxial, and the chain tensioner 8 and the frame 1 are detachably connected through a bolt 9 screwed in the first threaded hole and the second threaded hole.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. The embodiments of the disclosure are intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (6)

1. A bicycle, comprising:

a frame;

the rear wheel is rotatably arranged at the rear part of the frame, and a rear wheel shaft is arranged at the wheel center of the rear wheel;

the flywheel is sleeved on the rear wheel shaft;

the chain wheel is rotatably arranged on the frame;

the chain is wound on the flywheel and the chain wheel in a spanning mode;

the chain stretching device is detachably mounted on the frame, is located between the flywheel and the chain wheel and is close to the rear wheel, and is configured to be capable of tensioning the follow-up section of the chain.

2. The bicycle of claim 1, wherein a rear fork is provided on the frame, the rear wheel being mounted on the rear fork.

3. The bicycle of claim 2, wherein the rear fork includes a left rear fork beam and a right rear fork beam, the rear wheel being rotatably mounted between the left rear fork beam and the right rear fork beam.

4. The bicycle of claim 3, wherein the flywheel is located between the right rear fork beam and the rear wheel;

the chain expanding device is fixed on the right rear fork beam and is positioned between the right rear fork beam and the rear wheel.

5. The bicycle of any one of claims 1-4, wherein the chain tensioner comprises a first wheel member, a second wheel member, and a tooth member that cooperates with the chain to enable tensioning of the follower segment of the chain.

6. The bicycle of claim 5, wherein the frame is formed with a first threaded hole, the first wheel-like member is formed with a second threaded hole, the first threaded hole and the second threaded hole are coaxial, and the chain tensioner is detachably connected to the frame by a bolt screwed in the first threaded hole and the second threaded hole.

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