WO2021114293A1

WO2021114293A1 - Speed reduction assembly for bicycle, support device, and bicycle

Info

Publication number: WO2021114293A1
Application number: PCT/CN2019/125399
Authority: WO
Inventors: 谭建新; 胡恒芳; 谭智恩
Original assignee: 苏州锂智车业科技有限公司
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2021-06-17
Also published as: CN111132741B; CN111132741A

Abstract

Provided are a speed reduction assembly for bicycle, a support device and a bicycle (100), wherein the speed reduction assembly comprises a speed reduction assembly body (30) detachably mounted on a rotating bracket (12), the speed reduction assembly body (30) comprises a fixing part and a speed reduction part (33), the fixing part is fixedly connected to the speed reduction part (33), the speed reduction part (33) is in contact with a bicycle tire (110) so that there is friction force between the speed reduction part (33) and the bicycle tire (110), the speed reduction assembly body (30) rotates with the rotating bracket (12), the speed reduction assembly body (30) rotates to the lowest end of the rear wheel and is close to the tire (110) of the rear wheel at the connection point of a first connecting member (31) and the rotating bracket (12) under the action of gravity, and the speed reduction assembly body (30) is fixedly matched on the rotating bracket (12)by a third connecting member so that a friction part (331) abuts against the tire (110), and speed reduction is achieved by the friction force between the above two parts. The speed reduction assembly body (30) is used for the bicycle (100) for indoor exercises with simple operation and reduced cost.

Description

Speed reduction component, support device for bicycle and bicycle

Technical field

The invention relates to the field of bicycles, and in particular to a deceleration assembly for bicycles.

Background technique

The way to exercise by bicycle is loved by many people, and the bicycle exercise generally chooses outdoor exercise. But when encountering bad weather, the bicycle exercise can only be suspended, which will have a certain impact on the exerciser's body and mind. At present, there are exercise bicycles specially installed indoors on the market, but this exercise bicycle not only covers a large area but is also expensive, and cannot be popularized by the masses of people.

When using ordinary bicycles for indoor exercise, on the one hand, what needs to be solved is how to raise the rear wheel and maintain balance, and on the other hand, how to add a deceleration device to the bicycle to achieve the best exercise effect.

Summary of the invention

In order to overcome the shortcomings of the prior art, the present invention provides a deceleration assembly for bicycles.

The present invention solves the above technical problems by installing the deceleration assembly body on the bicycle support device.

The present invention provides a deceleration assembly for a bicycle, which includes a deceleration assembly body detachably mounted on a rotating bracket. The deceleration assembly body includes a fixed portion and a deceleration portion, and the fixed portion is fixedly connected to the deceleration portion. The deceleration part is in contact with the bicycle tire so that there is friction between the two;

The fixing portion includes a first connecting piece, a second connecting piece, and a third connecting piece. The first connecting piece and the second connecting piece are integrally formed, and the first connecting piece is perpendicular to the second connecting piece. One end of the first connecting piece is rotatably fixed on the rotating bracket; two ends of the second connecting piece are respectively connected to the two deceleration parts so that the deceleration assembly body forms a symmetrical structure; the third connecting piece For fixing the second connecting piece on the rotating bracket;

The second connecting piece and the two deceleration parts form a U-shaped space, and the U-shaped space matches the shape of the rotating bracket;

When the rotating bracket is located at the top of the bicycle wheel, the deceleration part is located close to the bicycle axle under the action of its own gravity;

When the rotating bracket rotates to the bottom end of the bicycle wheel, the decelerating part approaches the rear wheel of the bicycle under its own gravity; the decelerating part abuts the bicycle tire under the action of the third connecting member to increase the The friction between the deceleration part and the bicycle tire.

Preferably, the third connecting piece is perpendicular to the second connecting piece, the second connecting piece includes a threaded hole, and the third connecting piece fixes the deceleration assembly body to the rotating bracket through the threaded hole .

Preferably, the deceleration assembly body further includes an elastic member installed in the U-shaped space, the elastic member is vertically installed on the second connecting member, and the elastic member is located in the second connecting member. Between the connecting piece and the rotating bracket; the third connecting piece is adjusted to increase or decrease the degree of matching between the deceleration assembly body and the rotating bracket.

Preferably, the elastic member includes an elastic sleeve and at least one spring, the spring is installed inside the elastic sleeve, and the elastic sleeve contacts the inner wall of the U-shaped space.

Preferably, the side of the deceleration part in contact with the bicycle tire includes a friction part, and the friction part is fixedly installed on the deceleration part; the third connecting member adjusts the distance between the U-shaped space and the rotating bracket. The degree of matching to increase or decrease the friction between the friction part and the bicycle tire.

Preferably, the second connector and the deceleration part are integrally formed, the second connector and the deceleration part are made of metal material, and the friction part is detachably mounted on the deceleration part.

Preferably, a clamping member for clamping the first connecting member is installed on the rotating bracket, and the clamping member has elasticity and is fixedly installed on both sides of the rotating bracket; when the rotating bracket is located at the top of the bicycle wheel, The clamping member is used to fix the first connecting member on the rotating bracket.

The present invention also provides a support device for a bicycle, including a deceleration assembly, a support assembly, and a fixing seat assembly for a bicycle; the deceleration assembly body is mounted on the support assembly, and the support assembly is mounted on the support assembly. The fixed seat assembly; where,

The supporting assembly includes at least a pair of rotating brackets, the rotating brackets are respectively installed symmetrically on both sides of the rear wheel; the deceleration assembly body is rotatably installed on the rotating bracket;

When the support assembly is fixedly connected to the bicycle, the support assembly is located directly above the rear wheel, and the support assembly is used to carry people or objects; when the support assembly rotates 180 degrees around the axle , The support assembly is used to lift the rear wheel and fix the bicycle on the fixing seat assembly.

Preferably, the rotating bracket includes a through hole matching the threaded hole on the second connecting member, and a bolt passes through the through hole and fixes the deceleration assembly body to the rotating bracket through the threaded hole .

The present invention also provides a bicycle, including a support device for the bicycle, a front wheel and a rear wheel, and the support assembly is fixedly mounted on the front wheel or the rear wheel.

Compared with the prior art, the present invention has the following beneficial effects:

The invention discloses a deceleration assembly for a bicycle. The deceleration assembly body is detachably mounted on a rotating bracket; when the bicycle is exercising outdoors, there is no need to add the deceleration assembly body, and the deceleration assembly body is fixed on the rotating bracket and Since the decelerating part of its own gravity is close to the axle of the bicycle, a clamping piece is installed at the position corresponding to the rotating bracket and the decelerating part, and the body of the deceleration assembly can be fixed on the rotating bracket to prevent the bicycle from shaking back and forth during driving; The operation is simple and easy to use.

When the bicycle is exercising indoors, the support assembly rotates 180 degrees to just below the rear wheel, the deceleration assembly body rotates with the rotating bracket, and the deceleration assembly body rotates to the connection point of the first connector and the rotating bracket under the action of gravity. The lowest end of the rear wheel is close to the tire of the rear wheel, and the deceleration assembly body is fixed and matched on the rotating bracket through the third connecting member so that the friction part abuts the tire, and the friction between the two realizes deceleration; the deceleration assembly body is applied to The indoor exercise bicycle is simple to operate and cost-saving; in addition, an elastic piece is installed in the U-shaped space of the deceleration assembly body, and the elastic piece is adjusted to adapt to different types of exercisers.

The invention discloses a support device for bicycles, by installing a 180-degree rotatable support assembly, so that exercisers can conveniently choose indoor exercise or outdoor exercise, and avoid the inability to go outdoor exercise due to weather or other factors. When exercising outdoors, the support assembly is installed on the bicycle, and the support assembly is used to carry objects or people; when exercising indoors, pull the support assembly away from the bicycle and select it to be 180 degrees directly below the bicycle wheel to make the rear The wheels are raised to facilitate exercise. The support assembly is fixedly installed on the fixed seat assembly to increase the stability of the bicycle.

The above description is only an overview of the technical solution of the present invention. In order to understand the technical means of the present invention more clearly and implement it in accordance with the content of the description, the preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. The specific implementation of the present invention is given in detail by the following embodiments and the accompanying drawings.

Description of the drawings

The drawings described here are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments and descriptions of the present invention are used to explain the present invention, and do not constitute an improper limitation of the present invention. In the attached picture:

Fig. 1 is a structural schematic diagram of a state of a deceleration assembly for a bicycle according to the present invention;

Figure 2 is an enlarged view of the body of the deceleration assembly at A in Figure 1;

Fig. 3 is a schematic structural view of another state of a deceleration assembly for bicycles according to the present invention;

Figure 4 is an enlarged view of the body of the deceleration assembly at B in Figure 3;

5 is a schematic diagram of the three-dimensional structure of the deceleration assembly body of a deceleration assembly for a bicycle according to the present invention;

Fig. 6 is a schematic diagram of a three-dimensional structure of a deceleration assembly body of a deceleration assembly for a bicycle, including an elastic member;

Figure 7 is a schematic structural view of a support device for bicycles of the present invention;

Fig. 8 is a schematic structural view of the rear seat of a support device for a bicycle according to the present invention;

Reference signs: 100, bicycle, 110, tire, 120, front wheel, 130, axle, 10, support assembly, 11, rear seat part, 111, first snap joint, 111, first elliptical protrusion, 112, The second card connector, 1121, the second elliptical protrusion, 113, through hole, 12, rotating bracket, 121, through hole, 20, fixed seat assembly, 21, base, 22, protrusion, 23, stop, 30 , Deceleration assembly body, 31, first connecting piece, 32, second connecting piece, 321, threaded hole, 33, deceleration part, 331, friction part, 34, clamping part, 35, elastic part.

Detailed ways

In the following, the present invention will be further described with reference to the drawings and specific implementations. It should be noted that, provided that there is no conflict, the following embodiments or technical features can be combined to form new embodiments. .

The present invention provides a deceleration assembly for a bicycle, as shown in Figs. 1-6, comprising a deceleration assembly body 30 detachably mounted on a rotating bracket. The deceleration assembly body 30 includes a fixed part and a deceleration part 33. The fixed part is fixedly connected with the deceleration part 33, and the deceleration part 33 is in contact with the bicycle tire so that there is friction between the two;

The fixing portion includes a first connecting piece 31, a second connecting piece 32, and a third connecting piece (not shown in the figure). The first connecting piece 31 and the second connecting piece 32 are integrally formed, and the first connecting piece 31 is perpendicular to the second connecting member 32, one end of the first connecting member 31 is rotatably fixed on the rotating bracket 12; both ends of the second connecting member 32 are respectively connected to the two decelerating parts 33 So that the speed reduction assembly body 30 forms a symmetrical structure; the third connecting piece is used to fix the second connecting piece 32 to the rotating bracket 12;

The second connecting member 32 and the two deceleration parts 33 form a U-shaped space, and the U-shaped space matches the shape of the rotating bracket 12;

When the rotating bracket 12 is at the top of the bicycle wheel, the decelerating portion 33 is located close to the bicycle axle 130 under the action of its own gravity;

When the rotating bracket 12 rotates to the bottom end of the bicycle wheel, the decelerating portion 33 approaches the rear wheel of the bicycle under its own gravity; the decelerating portion 33 abuts the bicycle tire under the action of the third connecting member to Increase the friction between the deceleration portion 33 and the bicycle tire. In one embodiment, the bicycle wheel refers to the rear wheel of the bicycle. The deceleration assembly in this embodiment is based on the rotation of the rotating bracket 12 by 180 degrees so that the bicycle can also exercise indoors. The deceleration assembly is installed on the rotating bracket 12, and the rotating bracket 12 rotates with the bicycle shaft 130 as the center; when the rear seat portion 11 perpendicularly connected to the rotating bracket 12 is located directly above the bicycle wheel, one end of the deceleration assembly body 30 is rotatably fixed on the rotating bracket 12, and the deceleration portion 33 is on itself Under the action of gravity, close to the bicycle axle 130, the deceleration assembly body 30 rotates freely with the connection between the first connecting member 31 and the rotating bracket 12 as the center. The first connecting member 31 and the rotating bracket 12 can be connected by any connection method in the prior art. Preferably, the first connecting member 31 and the rotating bracket 12 are connected by bolts, but there is a space between them. So that the first connecting member 31 can rotate.

When the rear seat portion 11 and the rotating bracket 12 rotate 180 degrees with the bicycle axle, and the rear seat portion 11 rotates to just below the tire 110, the gravity of the deceleration assembly body 30 connects the first connector 31 with the rotating bracket 12 The point is the center and rotates 180 degrees, and the speed reduction part 33 rotates to the lowest end of the tire. The third connection makes the deceleration portion 33 abut the tire 110 to achieve the purpose of decelerating the bicycle.

It should be noted that the deceleration assembly body 30 includes at least two, which are respectively located on the rotating brackets 12 on both sides of the rear wheel; they can also be installed on other rotating brackets 12 as required.

Specifically, the third connecting piece is perpendicular to the second connecting piece 32, the second connecting piece 32 includes a threaded hole 321, and the third connecting piece connects the speed reduction assembly body 30 through the threaded hole 321. Fixed on the rotating bracket 12. The third connecting piece is perpendicular to the second connecting piece 32 and also perpendicular to the rotating bracket 12, the third connecting piece penetrates the second connecting piece 32 and the rotating bracket 12, and the two are fixed by bolts. The connection between the two can also be adopted Other connection methods in the prior art are implemented.

The deceleration assembly body 30 further includes an elastic member 35 installed in the U-shaped space, the elastic member 35 is vertically installed on the second connecting member 32, and the elastic member 35 is located in the U-shaped space. Between the second connecting member 32 and the rotating bracket 12; the third connecting member is adjusted to increase or decrease the degree of matching between the deceleration assembly body 30 and the rotating bracket 12. In one embodiment, installing the elastic member 35 in the U-shaped space can adjust the friction between the decelerating portion 33 and the tire 110, which can be adapted to different exercisers, for example, children and the elderly need to have less friction when exercising. , While the young and middle-aged people need to have greater friction during exercise in order to achieve a better exercise effect.

Specifically, the elastic member 35 includes an elastic sleeve and at least one spring, the spring is installed inside the elastic sleeve, and the elastic sleeve contacts the inner wall of the U-shaped space. Preferably, the number of springs is several, and several springs are evenly distributed in the U-shaped space and installed vertically on the second connecting member; the elastic sleeve has a certain flexibility, that is, the elastic sleeve follows the springs when the springs are deformed. deformation. The elastic sleeve can evenly disperse the force generated by the several springs so that the rotating bracket and the second connecting member are evenly stressed. The elastic member 35 is installed between the rotating bracket 12 and the second connecting member 32, the third connecting member passes through the elastic member, and the third connecting member is adjusted to increase or decrease the friction between the decelerating portion and the tire; this operation Simple, convenient and fast.

The side of the decelerating portion 33 that is in contact with the bicycle tire includes a friction portion 331 fixedly mounted on the decelerating portion 33; the third connecting member adjusts the relationship between the U-shaped space and the rotating bracket The degree of matching between the friction part 33 and the bicycle tire can be increased or decreased. The second connecting member 32 and the decelerating portion 33 are integrally formed, the second connecting member 32 and the decelerating portion 33 are made of metal material, and the friction portion 331 is detachably mounted on the decelerating portion 33. In one embodiment, the material of the deceleration assembly body 30 is preferably a metal material, and the friction part 331 is installed where it contacts the tire. The material of the friction part 331 is preferably a rubber material, which has strong wear resistance. The friction part 331 is detachably mounted on the deceleration part 33, and the connection method can be connected by an existing connection method.

A clamping member 34 for clamping the first connecting member 31 is installed on the rotating bracket 12. The clamping member 34 is elastic and fixedly installed on both sides of the rotating bracket 12; when the rotating bracket 12 is located at the top of the bicycle wheel At this time, the clamping member 34 is used to fix the first connecting member 31 to the rotating bracket 12. In one embodiment, when the rear seat of the bicycle is located directly above the rear wheel, that is, when exercising outdoors, the deceleration assembly body 30 approaches the bicycle axle 130 under its own gravity, which is prone to shake during the running of the bicycle, and the rotating bracket 12 The upper mounting clamping member 34 clamps the first connecting member 31 therein to prevent the deceleration assembly body 30 from shaking back and forth when the bicycle is running. The operation is simple and convenient, and the clamping member 34 can be inserted or pulled out only by applying an external force to the first connecting member 31.

The present invention also provides a support device for a bicycle, including a deceleration assembly for a bicycle, a support assembly 10, and a fixing seat assembly 20; the deceleration assembly body 30 is mounted on the support assembly 10, The support assembly 10 is installed on the fixed seat assembly 20; wherein,

The supporting assembly 10 includes at least a pair of rotating brackets 12, the rotating brackets 12 are respectively installed symmetrically on both sides of the rear wheel; the deceleration assembly body 30 is rotatably installed on the rotating bracket 12;

When the support assembly 10 is fixedly connected to the bicycle, the support assembly 10 is located directly above the rear wheel, and the support assembly 10 is used to carry people or objects; when the support assembly 10 is centered on the axle 130 After rotating 180 degrees, the support assembly 10 is used to lift the rear wheel and fix the bicycle on the fixing seat assembly 20. In one embodiment, by installing the support assembly 10 that can rotate 180 degrees, it is convenient for the exerciser to choose indoor exercise or outdoor exercise, avoiding the inability to go for outdoor exercise due to weather or other factors. When exercising outdoors, the support assembly is installed on the bicycle, and the support assembly 10 is used to carry objects or people; when exercising indoors, pull the support assembly away from the bicycle and select it to be 180 degrees directly below the bicycle wheel, so that The rear wheels are raised for exercise. The support assembly is fixedly installed on the fixed seat assembly 20 to increase the stability of the bicycle.

The rotating bracket 12 includes a through hole 121 that matches the threaded hole on the second connecting member 32. A bolt passes through the through hole 121 and fixes the deceleration assembly body 30 to the threaded hole 321. Rotate the bracket 12 on. In one embodiment, when the rear seat of the bicycle rotates directly below the bicycle wheel, the speed reduction assembly body 30 needs to be fixed to the rotating bracket 12, preferably, the speed reduction assembly body 30 is fixed to the rotating bracket 12 by bolts, and the rotating bracket A through hole 121 is provided at a place corresponding to the threaded hole 321 on the second connecting member 32, and the rotating bracket 12 and the deceleration assembly body 30 can also be fixed by other commonly used connection methods in the prior art.

One end of the rotating bracket 12 of the support assembly 10 is rotatably mounted on the axle 130 of the bicycle 100, the other end of the rotating bracket 12 is fixedly connected to the rear seat portion 11, and the rotating bracket 12 is installed on both sides of the rear wheel and fixedly connected to the rear seat at the same time When one end of the rear seat 11 is fixed on the bicycle 100, the rotating bracket 12 is used to fix the rear seat 11 on the bicycle 100, and the rear seat 11 can be used for carrying people or carrying objects.

When the exerciser needs to exercise indoors, the rear seat 11 is pulled out of the bicycle, and the detachable connection between the rear seat 11 and the bicycle will be described in detail below. The rear seat portion 11 can be separated from the bicycle by external force, and the rear seat portion 11 rotates 180 degrees with the axle 130 of the bicycle as the center, and reaches directly below the rear wheel. The length of the rotating bracket 12 is greater than the radius of the bicycle wheel, so the rotating bracket 12 can lift the rear wheel of the bicycle. The weight of the bicycle is lighter. The rotating bracket 12 can be rotated to the front wheel after the rear wheel of the bicycle is lifted manually. Below.

When exercisers are exercising indoors, the bicycle is easy to lose balance, especially for children and the elderly, which will be a safety hazard. The fixing seat assembly 20 is used to fix the bicycle on the ground and maintain the balance of the bicycle. The fixed seat assembly 20 is preferably made of a denser material, such as some metals. The fixed seat assembly 20 is placed on the indoor ground, and the placement of other objects is not affected when the bicycle is not being exercised. The fixed seat assembly 20 The thickness of the fixed seat assembly 20 is relatively thin, and the thickness of the fixed seat assembly 20 can be adjusted according to its density, as long as the balance of the bicycle can be ensured.

The rear seat portion 11 includes a plurality of through holes 113, and the fixing groove includes a plurality of threaded holes that match the through holes 113, and the support assembly 10 is fixed to the through holes 113 by bolts. The fixed seat assembly 20 is used to fix the bicycle on the fixed seat assembly 20. In one embodiment, when the supporting device body rotates directly below the bicycle, the through hole 113 on the rear seat 11 contacts the fixing seat assembly 20 and matches with the threaded holes on the rear seat 11, and the rear seat 11 is fixed to the rear seat 11 by bolts. The fixed seat assembly 20 is on. The support assembly 10 and the fixing seat assembly 20 can be connected in a variety of ways, and the connection is not limited to bolts.

The fixed seat assembly 20 includes a protrusion 22 that is used to make the bottom of the front wheel of the bicycle and the bottom of the rear wheel lie on the same horizontal line. The protrusion 22 also includes a stopper 23 for blocking the front wheel of the bicycle from continuing to move forward, and the stopper 23 is fixedly installed on the protrusion 22. In one embodiment, when the rear wheel is lifted by the support assembly 10, the front wheel and the rear wheel will not be on the same level. When the exerciser is exercising, not only may lose his balance but also make his sitting posture uncomfortable. Therefore, a protrusion 22 is provided on the fixed seat assembly 20 to keep the front wheel and the rear wheel on the same horizontal line. In addition, the stop 23 on the protrusion 22 is used to block the bicycle from using the fixed seat assembly 20, especially when the bicycle has just entered the fixed seat assembly 20.

The rear seat portion 11 further includes an insertion portion for inserting a matching card slot 13 that is fixedly installed on the bicycle; the insertion portion is inserted into the card slot 13 so that the rear The seat part 11 is fixed on the bicycle; the insertion part is pulled out of the card slot 13, and the rear seat part 11 is separated from the bicycle, so that the support assembly 10 rotates with the axle 130. The insertion portion includes two clamping joints, namely a first clamping joint 111 and a second clamping joint 112. The outer edges of the first clamping joint 111 and the second clamping joint 112 respectively include a first elliptical protrusion 1111 and a second elliptical shape. A protrusion 1121, the card connector is clamped into the card slot 13 under force, and the elliptical protrusion makes the rear seat portion 11 fixed in the card slot 13. When the rear seat 11 is located directly above the rear wheel, there are many ways to fix it with the bicycle. In this embodiment, the connection is made by a buckle, which is convenient for insertion and removal for operation. It is convenient and quick, and the operation is simple. The two clamping joints are formed by a partial extension of the rear seat, and the outer sides of the two clamping joints include an elliptical protrusion, which enables the clamping joint to be inserted into the card slot 13 under the action of external force and fixed on the bicycle; When it needs to be pulled out, the card connector can be pulled out from the card slot 13 by external force. The rear seat is parallel to the direction in which the bicycle walks, so when the rear seat is stressed, it will receive force in the vertical direction, and will not have a component in the horizontal direction; the rear seat will only receive force in the horizontal direction. Will be pulled out.

In order to ensure safety, the rear seat can be fixed to the bicycle by means of bolts. The load of the bicycle can be increased by means of bolts, which can avoid the hidden danger of the snap-in connection method, that is, the level of the rear seat when the load is too large. The component force in the direction makes the rear seat part to separate from the bicycle, which is dangerous.

The present invention also provides a bicycle 100 that uses a support device for a bicycle, a front wheel 120 and a rear wheel, and the support assembly is fixedly mounted on the front wheel 120 or the rear wheel. The support assembly can be fixedly installed on the rear wheel alone, or fixedly installed on the rear wheel and the front wheel 120 at the same time. When the support assembly is installed on the rear wheel and the front wheel 120 at the same time, the fixing seat assembly 20 includes a matching setting.

The above are only the preferred embodiments of the present invention, and do not limit the present invention in any form; any person of ordinary skill in the industry can smoothly implement the present invention as shown in the drawings and above in the specification; however, wherever Those who are familiar with the profession make use of the technical content disclosed above to make minor changes, modifications, and equivalent changes without departing from the scope of the technical solution of the present invention, all of which are equivalent embodiments of the present invention; at the same time, Any changes, modifications, and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

A deceleration assembly for a bicycle, characterized in that it comprises a deceleration assembly body detachably mounted on a rotating bracket, the deceleration assembly body includes a fixed part and a deceleration part, the fixed part and the deceleration part are fixedly connected, the The deceleration part is in contact with the bicycle tire so that there is friction between the two;

The fixing portion includes a first connecting piece, a second connecting piece, and a third connecting piece. The first connecting piece and the second connecting piece are integrally formed, and the first connecting piece is perpendicular to the second connecting piece. One end of the first connecting piece is rotatably fixed on the rotating bracket; two ends of the second connecting piece are respectively connected to the two deceleration parts so that the deceleration assembly body forms a symmetrical structure; the third connecting piece For fixing the second connecting piece on the rotating bracket;

The second connecting piece and the two deceleration parts form a U-shaped space, and the U-shaped space matches the shape of the rotating bracket;

When the rotating bracket is located at the top of the bicycle wheel, the deceleration part is located close to the bicycle axle under the action of its own gravity;

When the rotating bracket rotates to the bottom end of the bicycle wheel, the decelerating part approaches the rear wheel of the bicycle under its own gravity; the decelerating part abuts the bicycle tire under the action of the third connecting member to increase the The friction between the deceleration part and the bicycle tire.
The speed reduction assembly for a bicycle according to claim 1, wherein the third connecting piece is perpendicular to the second connecting piece, the second connecting piece includes a threaded hole, and the third connecting piece The deceleration assembly body is fixed on the rotating bracket through the threaded hole.
The deceleration assembly for a bicycle according to claim 2, wherein the deceleration assembly body further comprises an elastic member, the elastic member is installed in the U-shaped space, and the elastic member is vertically installed in the U-shaped space. On the second connecting member, the elastic member is located between the second connecting member and the rotating bracket; the third connecting member is adjusted to increase or decrease the matching between the deceleration assembly body and the rotating bracket degree.
The deceleration assembly for a bicycle according to claim 3, wherein the elastic member comprises an elastic sleeve and at least one spring, the spring is installed inside the elastic sleeve, and the elastic sleeve contacts the elastic sleeve. The inner wall of the U-shaped space.
The deceleration assembly for a bicycle according to claim 2, wherein the side of the deceleration part in contact with the bicycle tire includes a friction part, and the friction part is fixedly installed on the deceleration part; The third connecting member adjusts the degree of matching between the U-shaped space and the rotating bracket to increase or decrease the friction between the friction portion and the bicycle tire.
A deceleration assembly for a bicycle according to claim 5, wherein the second connecting member and the deceleration portion are integrally formed, and the second connecting member and the deceleration portion are made of metal, so The friction part is detachably mounted on the deceleration part.
The deceleration assembly for a bicycle according to claim 2, wherein a clamping member for clamping the first connecting member is installed on the rotating bracket, and the clamping member has elasticity and is fixedly mounted on the rotating bracket. Two sides of the rotating bracket; when the rotating bracket is located at the top of the bicycle wheel, the clamping member is used to fix the first connecting member on the rotating bracket.
A support device for a bicycle, characterized in that it comprises a deceleration assembly, a support assembly and a fixing seat assembly for a bicycle as claimed in any one of claims 1-7; the deceleration assembly body is mounted on the On the support assembly, the support assembly is installed on the fixing seat assembly; wherein,

The supporting assembly includes at least a pair of rotating brackets, the rotating brackets are respectively installed symmetrically on both sides of the rear wheel; the deceleration assembly body is rotatably installed on the rotating bracket;

When the support assembly is fixedly connected to the bicycle, the support assembly is located directly above the rear wheel, and the support assembly is used to carry people or objects; when the support assembly rotates 180 degrees with the axle as the center , The support assembly is used to lift the rear wheel and fix the bicycle on the fixing seat assembly.
The support device for a bicycle according to claim 8, wherein the rotating bracket includes a through hole that matches the threaded hole on the second connecting member, and the bolt passes through the through hole. And the speed reduction assembly body is fixed on the rotating bracket through the threaded hole.
A bicycle, characterized by comprising a support device for a bicycle according to claim 8, a front wheel and a rear wheel, and the support assembly is fixedly mounted on the front wheel or the rear wheel.