CN113815766A

CN113815766A - Bicycle with a wheel

Info

Publication number: CN113815766A
Application number: CN202111165859.4A
Authority: CN
Inventors: 吴京龙; 林仁坤; 李志伟; 黄莎
Original assignee: Wuyi University
Current assignee: Wuyi University
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2021-12-21
Anticipated expiration: 2041-09-30
Also published as: CN113815766B

Abstract

The invention discloses a bicycle, and relates to the technical field of bicycles. The bicycle comprises a frame, wherein the frame comprises a vertical pipe and a rear upper fork, and one end of the vertical pipe is rotatably connected with one end of the rear upper fork; the front chain wheel is rotationally connected with the other end of the vertical pipe; the rear chain wheel comprises a chain wheel seat and a plurality of adjusting pieces, the chain wheel seat is rotationally connected with the other end of the rear upper fork, the plurality of adjusting pieces are arranged at intervals along the circumferential direction of the chain wheel seat and are respectively connected with the chain wheel seat in a sliding mode along the radial direction of the chain wheel seat, and one end, far away from the chain wheel seat, of each adjusting piece is provided with a chain tooth; and the chain is meshed with the front chain wheel and the chain teeth of the plurality of adjusting pieces so as to drive and connect the front chain wheel and the rear chain wheel. According to different gradients, the center distances between the rear chain wheel and the front chain wheel are different, so that the matching diameter of the rear chain wheel and the chain is changed, and the stepless speed change is realized; the problem of chain jamming or dropping can also be reduced because the chain does not need to be changed to other chain wheels.

Description

Bicycle with a wheel

Technical Field

The invention relates to the technical field of bicycles, in particular to a bicycle.

Background

In the related art, a common bicycle has a speed changing system, and the speed of the bicycle is changed by changing the matching of a chain and gear discs with different front and rear sizes. The size of the front fluted disc and the size of the rear fluted disc determine the force of the bicycle when the pedals are rotated. The bigger the front fluted disc is, the smaller the rear fluted disc is, and the harder the pedal feels when pedaling. The smaller the front fluted disc is, and the larger the rear fluted disc is, the easier the pedals feel. According to the capacities of different drivers, the speed of the bicycle can be adjusted by adjusting the sizes of the front fluted disc and the rear fluted disc, or the bicycle can be adjusted to different road sections and road conditions. However, the speed change mode can only achieve step-by-step gear shifting, and the chain is easy to be locked or fall off in the gear shifting process.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a bicycle which can realize stepless speed change and reduce the condition that a chain is blocked or falls off in the speed change process.

A bicycle according to an embodiment of the present invention includes:

the bicycle comprises a bicycle frame, a bicycle frame and a bicycle frame, wherein the bicycle frame comprises a vertical pipe and a rear upper fork, and one end of the vertical pipe is rotatably connected with one end of the rear upper fork;

the front chain wheel is rotationally connected with the other end of the vertical pipe;

the rear chain wheel comprises a chain wheel seat and a plurality of adjusting pieces, the chain wheel seat is rotationally connected with the other end of the rear upper fork, the plurality of adjusting pieces are arranged along the circumferential direction of the chain wheel seat at intervals and are respectively connected with the chain wheel seat in a sliding mode along the radial direction of the chain wheel seat, and one end, far away from the chain wheel seat, of each adjusting piece is provided with a chain tooth;

a chain engaged with the front sprocket and the teeth of the plurality of adjusters to drivingly connect the front sprocket and the rear sprocket.

The bicycle provided by the embodiment of the invention at least has the following beneficial effects:

when the bicycle is driven on flat ground, the rider's gravity will force the bicycle's back fork to rotate about the connection with the seat tube and away from the seat tube. Because preceding sprocket and riser are connected, back sprocket and back are gone up the fork and are connected, consequently go up the fork in the back around the riser pivoted the condition under, the centre-to-centre spacing grow of preceding sprocket and back sprocket, the tensioning force grow that the chain received, and then compress the regulating part of back sprocket towards the direction that is close the chain wheel seat, so, the regulating part cooperation part diameter of chain and back sprocket reduces, and the drive ratio grow lets the rider ride faster.

When the bicycle goes up a slope, the position of the gravity center of a rider is changed, the force applied to the vertical pipe and the rear upper fork is reduced, the rear upper fork rotates around the connecting position of the rear upper fork and the vertical pipe and towards the direction close to the vertical pipe, therefore, the center distance between the front chain wheel and the rear chain wheel is reduced, the tensioning force applied to the chain is reduced, and then the adjusting piece of the rear chain wheel extends towards the direction far away from the chain wheel seat, so the diameter of the adjusting piece matching part of the chain and the rear chain wheel is increased, the transmission ratio is reduced, and the rider can ride the bicycle more easily and more laborsavingly. According to different gradients, the center distances between the rear chain wheel and the front chain wheel are different, so that the matching diameter of the rear chain wheel and the chain is changed, and the stepless speed change is realized; the problem of chain jamming or dropping can also be reduced because the chain does not need to be changed to other chain wheels.

According to some embodiments of the invention, the adjusting member comprises a guide part and an engaging part which are connected, the guide part is connected with the sprocket seat in a sliding manner, and the sprocket teeth are uniformly distributed on the periphery of the engaging part.

According to some embodiments of the present invention, the rear sprocket further comprises a first spring, the first spring is sleeved on the guide portion, one end of the first spring is connected with the outer circumferential wall of the sprocket seat, and the other end of the first spring is connected with the guide portion.

According to some embodiments of the invention, an end of the guide portion remote from the engagement portion is provided with a stopper for restricting disengagement of the adjusting member from the sprocket seat.

According to some embodiments of the invention, the sprocket seat comprises a base and a cover, the base is circumferentially provided with a plurality of grooves at intervals, the adjusting member is movably connected to the grooves, and the cover is connected to the base.

According to some embodiments of the invention, the cover is removably attached to the base.

According to some embodiments of the invention, the bicycle is provided with a sliding member comprising a first slide and a second slide, the first slide being slidably connected to the second slide, the first slide being connected to the seat tube, the second slide being connected to the seat stay.

According to some embodiments of the invention, a sliding groove is formed at one end of the first sliding seat far away from the end connected with the stand pipe, and a sliding block is formed at one end of the second sliding seat far away from the end connected with the rear upper fork, and the sliding block and the sliding groove are mutually matched and slidably connected.

According to some embodiments of the invention, the sliding member further comprises a second spring disposed at the sliding groove to elastically connect the first slider and the second slider.

According to some embodiments of the invention, the bicycle further comprises a damper spring, one end of the damper spring being connected to the seat tube or the seat stay, and the other end of the damper spring being connected to the second slide.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The invention is further described with reference to the following figures and examples, in which:

FIG. 1 is a bicycle illustrated in accordance with one embodiment of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a schematic structural view of a rear sprocket according to one embodiment of the present invention;

fig. 4 is a schematic structural view of a sliding member according to an embodiment of the present invention.

Reference numerals:

bicycle 100, frame 110, stem 111, damping spring 112, rear upper fork 113, front sprocket 120, rear sprocket 130, meshing part 131, sprocket 1311, first spring 132, sprocket seat 133, cover 1331, base 1332, groove 1333, chain 140, sliding member 150, first slide seat 151, sliding groove 1511, second slide seat 152, slide block 1521, guide part 210, stop block 230, adjusting member 310, second spring 410.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1-3, wherein fig. 1 is a schematic view of a bicycle 100 in accordance with one embodiment of the present invention; FIG. 2 is an enlarged schematic view at A in FIG. 1; fig. 3 is a schematic structural view of the rear sprocket 130 according to an embodiment of the present invention, and the first spring 132 is not shown in fig. 3. It is understood that bicycle 100 includes frame 110, front sprocket 120, rear sprocket 130, and chain 140, frame 110 includes stem 111 and upper rear fork 113, and one end of stem 111 is rotatably connected to one end of upper rear fork 113; the front chain wheel 120 is rotationally connected with the other end of the vertical pipe 111, and the rear chain wheel 130 is rotationally connected with the other end of the rear upper fork 113; the rear sprocket 130 further comprises a sprocket seat 133 and an adjusting member 310, and one end of the adjusting member 310 away from the sprocket seat 133 is provided with a sprocket 1311. Wherein, the chain 140 is engaged with the teeth 1311 of the front sprocket 120 and the rear sprocket 130 for transmitting the power generated from the front sprocket 120 to the rear sprocket 130.

It can be understood that the adjusting member 310 includes an engaging part 131, a guide part 210, a first spring 132 and a sprocket 1311, wherein the sprocket 1311 is uniformly arranged on the circumference of the engaging part 131, the engaging part 131 is connected with the guide part 210, the guide part 210 is slidably connected with the sprocket seat 133, and the sprocket seat 133 is rotatably connected with the rear upper fork 113. The first spring 132 is sleeved on the guiding portion 210, one end of the first spring 132 is connected to the outer circumferential wall of the sprocket seat 133, and the other end is connected to the guiding portion 210, and the first spring 132 can allow the engaging portion 131 to return to the initial position.

The initial position refers to a position where the engagement portion 131 is located by the elastic force of the first spring 132 when the bicycle 100 is not ridden.

It should be noted that, the connection of one end of the first spring 132 with the peripheral wall of the sprocket seat 133 and the other end with the guide part 210 can be understood as that the first spring 132 is fixedly connected with the peripheral wall of the sprocket seat 133 and the other end is fixedly connected with the guide part 210; it can also be understood that the first spring 132 abuts the outer peripheral wall of the sprocket seat 133, and the other end abuts the guide portion 210; or one end of the first spring is abutted and the other end of the first spring is fixedly connected.

It will be appreciated that when the bicycle 100 is traveling on level ground, the rider's weight will force the seat stay 113 of the bicycle 100 to rotate about the connection with the seat tube 111 and away from the seat tube 111. Since the front sprocket 120 is connected to the stem 111 and the rear sprocket 130 is connected to the upper rear fork 113, when the upper rear fork 113 rotates around the stem 111, the center distance between the front sprocket 120 and the rear sprocket 130 becomes large, the tension applied to the chain 140 becomes large, the elastic force of the first spring 132 between the meshing part 131 and the sprocket seat 133 is overcome, and the meshing part 131 of the rear sprocket 130 is compressed toward the sprocket seat 133, so that the diameter of the portion of the chain 140 engaged with the meshing part 131 of the rear sprocket 130 is reduced, the transmission ratio becomes large, and the rider can ride faster.

When the bicycle 100 goes up a slope, the position of the rider's center of gravity changes, the force applied to the stem 111 and the seat stays 113 decreases, the seat stays 113 rotate around the connection with the stem 111 toward the direction approaching the stem 111 under the elastic force of the first spring 132 between the engaging part 131 and the sprocket seat 133, so that the center distance between the front sprocket 120 and the rear sprocket 130 becomes smaller, the tension applied to the chain 140 becomes smaller, and the engaging part 131 of the rear sprocket 130 extends away from the sprocket seat 133 under the elastic force of the first spring 132, so that the diameter of the engaging part 131 of the chain 140 and the rear sprocket 130 becomes larger, the transmission ratio becomes smaller, and the rider can ride more easily and easily.

According to different gradients, the center distances between the rear chain wheel 130 and the front chain wheel 120 are different, so that the matching diameters of the rear chain wheel 130 and the chain 140 are changed, and stepless speed change is realized; the problem of chain 140 jamming or falling off can also be reduced since there is no need to change chain 140 to another sprocket.

Referring to fig. 2 and 3, it can be understood that the sprocket seat 133 includes a base 1332 and a cover 1331, the base 1332 is provided with a plurality of grooves 1333 at intervals along a circumferential direction, the grooves 1333 are evenly distributed on the base 1332, the guide part 210 can be movably connected to the grooves 1333 to be slidably connected to the sprocket seat 133, and the cover 1331 is detachably connected to the base 1332. The detachable connection may be a screw connection, a snap connection, a pin connection, or the like, and has the advantage of facilitating the assembly of the guide portion 210 and the sprocket seat 133.

It should be noted that a stop block 230 is further connected to an end of the guide portion 210 away from the engaging portion 131, and the stop block 230 can limit the guide portion 210 from disengaging from the sprocket seat 133. The connection mode of the limiting block 230 and the guiding portion 210 may be a threaded connection, so that the limiting block 230 can be detached, and the first spring 132 can be conveniently assembled.

It should be noted that the connection manner of the limiting block 230 and the guiding portion 210 may also be a fixed connection, such as welding or integral molding, so as to improve the connection strength between the limiting block 230 and the guiding portion 210.

Referring to fig. 3, it can be understood that the base 1332 of the sprocket seat 133 forms a cavity therein, the stop block 230 is located in the cavity, and the stop block 230 can be caught at a side of the groove 1333 close to the cavity, thereby restricting the guide part 210 from being separated from the sprocket seat 133.

Referring to fig. 1 and 4, it can be appreciated that bicycle 100 further includes a sliding member 150. The sliding member 150 includes a first slide 151 and a second slide 152, and the first slide 151 and the second slide 152 are slidably connected. The first slider 151 is connected to the stem 111, and the second slider 152 is connected to the upper rear fork 113. The sliding member 150 serves to increase the coupling strength when the seat tube 111 and the seat stay 113 are rotated.

It will be appreciated that the end of the first slider 151 remote from the connecting riser 111 is provided with a chute 1511, the chute 1511 being formed by a cut-out portion of the interior of the first slider 151. One end of the second sliding seat 152, which is far away from the connecting rear upper fork 113, is provided with a sliding block 1521 matched with the shape of the sliding groove 1511, and the sliding block 1521 and the sliding groove 1511 are matched and slidably connected.

In some embodiments, the sliding groove 1511 is further provided with a second spring 410, one end of the second spring 410 is connected to the sliding block 1521, and the other end of the second spring 410 is connected to the sliding groove 1511, the second spring 410 can elastically connect the first sliding seat 151 and the second sliding seat 152, and can restore the second sliding seat 152 when the second sliding seat 152 is not pushed or pulled by an external force. It should be noted that the return refers to a position of the second slide 152 under the elastic force of the second spring 410 when the bicycle 100 is not ridden.

Referring to fig. 1, it can be understood that one end of slide member 150 and front sprocket 120 are connected to stem 111 by the same shaft, and the other end of slide member 150 and rear sprocket 130 are connected to rear upper fork 113 by the same shaft. The connection mode can be conveniently assembled, and the structure is more reasonable.

Referring to FIG. 1, it can be appreciated that the bicycle 100 also includes a damper spring 112. The damping spring 112 may be connected at one end to the seat stay 111 or to the rear upper fork 113 and at the other end to the second slider 152. In a bumpy road section on the ground, the vertical pipe 111 and the back upper fork 113 frequently rotate, so that the second spring 410 repeatedly stretches and retracts, the bumpy feeling can be reduced, and the user experience is improved. The damping spring 112 can also push the second slide carriage 152 in a direction away from the first slide carriage 151 in the process that the rear upper fork 113 rotates away from the stand pipe 111, so that the center distance between the front chain wheel 120 and the rear chain wheel 130 is increased; when the rear upper fork 113 rotates in a direction approaching the stem 111, the second slider 152 is pulled in a direction approaching the first slider 151, and the center distance between the front sprocket 120 and the rear sprocket 130 is reduced.

It is understood that the bicycle 100 also includes components such as a seat, wheels, pedals, and a brake system.

In summary, the overall working principle of the bicycle 100 provided by the embodiment of the present invention is as follows:

when the bicycle 100 is driven on a flat ground, the seat stay 111 is rotated away from the seat stay 111 by the rider's weight, the damper spring 112 is compressed, and the sliding member 150 is pulled to apply a pulling force to the second slide 152, and the second slide 152 slides away from the first slide 151 against the pulling force of the second spring 410. Therefore, the center distance between the front sprocket 120 and the rear sprocket 130 is increased, the tension applied to the chain 140 is increased, the engaging portion 131 of the rear sprocket 130 is compressed, the engaging portion 131 works against the elastic force of the first spring 132 toward the sprocket seat 133, the guide portion 210 acts as a guide, and the probability of the engaging portion 131 tilting is reduced. Therefore, the engaging portion 131 and the chain 140 are reduced in diameter at the engaging portion, the transmission ratio becomes large, and the rider can ride faster.

When the bicycle 100 is going uphill, the position of the center of gravity of the rider is changed, the force applied to the stem 111 and the seat stay 113 is reduced, the seat stay 113 rotates in a direction approaching the stem 111 under the action of the elastic force of the second spring 410, the elastic force of the damper spring 112, and the elastic force of the first spring 132, and the slide member 150 is pressed to apply a pressing force to the second slide 152, and the second slide 152 slides in a direction approaching the first slide 151 under the action of the pulling force of the second spring 410. Therefore, the center distance between the front sprocket 120 and the rear sprocket 130 becomes smaller, resulting in a smaller tension applied to the chain 140, the engaging part 131 of the rear sprocket 130 is extended away from the sprocket seat 133 by the elastic force of the first spring 132, and the guide part 210 serves as a guide to allow the adjusting member 310 to be slidably coupled in the radial direction of the sprocket seat 133 while reducing the probability of the engaging part 131 being inclined. Therefore, the diameter of the engagement portion 131 and the chain 140 becomes large, the transmission ratio becomes small, and riding by the rider becomes labor-saving.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.

Claims

1. A bicycle, comprising:

2. The bicycle of claim 1, wherein the adjusting member comprises a guide part and an engaging part connected with each other, the guide part is slidably connected with the sprocket seat, and the sprocket teeth are uniformly distributed on the circumference of the engaging part.

3. The bicycle of claim 2, wherein the rear sprocket further comprises a first spring, the first spring is sleeved on the guide portion, one end of the first spring is connected with the peripheral wall of the sprocket seat, and the other end of the first spring is connected with the guide portion.

4. The bicycle of claim 2, wherein an end of the guide portion remote from the engaging portion is provided with a stopper for restricting the adjusting member from being disengaged from the sprocket seat.

5. The bicycle of any of claims 1-4, wherein the sprocket seat includes a base and a cover, the base having a plurality of circumferentially spaced grooves, the adjustment member being movably coupled to the grooves, and the cover being coupled to the base.

6. The bicycle of claim 5, wherein the cover is removably attached to the base.

7. The bicycle of claim 1, wherein the bicycle is provided with a slide assembly comprising a first slide and a second slide, the first slide being slidably connected to the second slide, the first slide being connected to the seat tube, the second slide being connected to the seat stay.

8. The bicycle of claim 7, wherein the first slide is provided with a slide slot at an end thereof remote from the end connected to the stem, and the second slide is provided with a slide block at an end thereof remote from the end connected to the seat stay, the slide block and the slide slot being slidably connected to each other.

9. The bicycle of claim 8, wherein the sliding member further comprises a second spring disposed in the sliding slot to elastically couple the first slide and the second slide.

10. The bicycle of claim 7, further comprising a shock spring having one end connected to the seat tube or seat stay and another end connected to the second slide.