CN215831048U - Speed-changing flywheel applied to bicycle - Google Patents

Abstract

The utility model relates to the technical field of bicycles and provides a bicycle which is applied to a speed-changing flywheel of the bicycle so as to obtain light weight and safety; the structure of the ratchet wheel comprises a main shaft, ratchet wheels and a limiting sleeve, wherein two ratchet wheels are sleeved on the outer wall of the main shaft, rocker arms are arranged on the outer walls of the ratchet wheels, a rigid spring is connected between the rocker arms, and free ends of the rocker arms are connected with a flywheel set; and one side of the ratchet wheel is provided with a limiting sleeve in a fitting manner. The utility model solves the technical problem of heavier bicycle and lower safety, the change of the position of the flywheel set relative to the main shaft is completed through the structural change of the rocker arm, and the diameter change of the flywheel is further realized.

Description

Speed-changing flywheel applied to bicycle

Technical Field

The utility model relates to the technical field of bicycle accessories, in particular to a speed-changing flywheel applied to a bicycle.

Background

The existing bicycle flywheel adopts multi-level metal flywheels mostly, 5-9 metal flywheel pieces are arranged, the weight of the bicycle is greatly improved, the speed change process is interrupted, a rider rides the bicycle and feels greatly reduced in riding comfort, the chain is greatly damaged, if the bicycle is ridden and accelerated, the chain is broken, the rider also has the risk of falling injury, and although the speed change mechanism is additionally arranged on the pedal mechanism, the chain still can be highly abraded.

Therefore, it is necessary to develop a flywheel for a bicycle to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a variable speed flywheel applied to a bicycle so as to reduce the whole bicycle mass of the racing bicycle.

The above object of the present invention can be achieved by the following technical solutions:

in one aspect, the present invention provides a speed changing flywheel for a bicycle, comprising: the main shaft, the ratchet wheel and the limiting sleeve; the outer wall of the main shaft is sleeved with two ratchets, three rocker arms are uniformly distributed on the outer wall of each ratchet wheel in a circumferential manner, rigid springs are connected among the rocker arms, and free ends of the rocker arms are connected with flywheel sets;

the two ratchet wheels are respectively provided with a limiting sleeve in a laminating manner at one side, the limiting sleeves are respectively limited with the ratchet wheels through extension springs, and clamping rings are arranged at one sides of the limiting sleeves;

a first pull wire is fixedly connected to the end part, close to the flywheel set, of the rocker arm, penetrates through the ratchet wheel, and the free end of the first pull wire is fixedly connected to the end part, close to the ratchet wheel, of the limiting sleeve;

a clamping ring tip fixedly connected with second is acted as go-between, the second act as go-between with another tip sliding connection of clamping ring, clamping ring end connection has two connecting plates, be provided with diaphragm and screw rod between the connecting plate, be located the part of diaphragm top the screw rod with the second acts as go-between is through supplementary acting as go-between fixed connection, is located the part of diaphragm below the screw rod outside cover is equipped with the third and acts as go-between, the third act as go-between run through the connecting plate and with connecting plate sliding connection, the screw rod is kept away from the spacing fore-set of tip fixedly connected with of diaphragm.

Preferably, the ratchet wheel is a circular ring body, and one side of the ratchet wheel, which is far away from the main shaft, is provided with a ratchet.

Preferably, the rocker arm is an L-shaped connecting arm, and the middle connecting position of the rocker arm is rotatably connected through a rotating shaft.

Preferably, the flywheel set comprises two groups of arc-shaped flywheels, wherein a single group of arc-shaped flywheels synchronously displace under the limit of the rocker arm.

Preferably, the ends of the rigid spring are respectively fixedly connected with the two connecting arms of the rocker arm.

Preferably, the limiting sleeve is formed by splicing two circular rings with different outer diameters and is in clearance fit with the main shaft.

Preferably, one side of the limiting sleeve, which is close to the ratchet wheel, is provided with limiting teeth matched with the ratchet.

Preferably, the clamping ring is formed by connecting two arc-shaped lantern rings in a scissor fork mechanism, and anti-skid rubber is bonded on one side, close to the limiting sleeve, of the clamping ring.

Preferably, the first stay wire, the second stay wire, the third stay wire and the auxiliary stay wire are all made of synthetic steel 65 Mn.

Preferably, a rolling bearing is arranged between the main shaft and the ratchet wheel, and the number of the first pull wires corresponds to that of the rocker arms.

Preferably, a metal anti-abrasion pad is arranged at the sliding connection position of the clamping ring and the second stay wire, and a compression spring is arranged at the connection position of two arc-shaped lantern rings included by the clamping ring.

Preferably, the two ratchet wheels are respectively arranged in a sliding mode relative to the main shaft, and the rocker arm is made of synthetic steel 42 CrMo.

The utility model has the characteristics and advantages that:

1. compared with the traditional multistage flywheel, the flywheel set provided by the utility model greatly reduces the weight of metal parts in the bicycle, and further realizes the light weight of the bicycle in competition, so that a user can obtain a higher transmission ratio.

2. Compared with the traditional multistage flywheel, the speed change is faster, the power transmission is smoother, the pause and frustration of a user in the riding process is reduced, and the transmission coefficient is higher.

3. According to the utility model, the flywheel sets are divided into two groups of six flywheel sets which are uniformly distributed on the circumference, and the three pull wires are respectively and fixedly connected with the limiting sleeve, namely the limiting sleeve drives the three pull wires to synchronously displace, so that the corresponding flywheel sets are kept on the same circumference all the time, the possibility of chain collapse or falling is reduced, and the running stability of the bicycle is improved.

4. The speed changing device is connected through the L-shaped rocker arms, and the connecting arms with the same length are rotatably arranged, so that the stability of the speed changing process is further improved.

5. According to the utility model, the two groups of six flywheel sets are arranged, and the three arc-shaped flywheels in the single group are uniformly distributed on the same circumference all the time, so that the end parts of the arc-shaped flywheels are prevented from rubbing the chain, and the service life of the chain is prolonged.

6 the rocker arm is fixedly connected with the rigid spring, so that the shock resistance of the rocker arm is improved, and the influence on the service life of the rocker arm when a user outputs high power is avoided.

7. The inner wall of the limiting sleeve is polished and is in sliding friction with the main shaft, so that the influence on the matching of the limiting sleeve and the ratchet wheel due to insufficient stress of the clamping ring is avoided, and the smooth speed change is further influenced.

8. According to the utility model, the limiting teeth made of hard wear-resistant rubber are arranged on one side of the limiting sleeve, so that the limiting of the ratchet wheel is realized conveniently, the friction force between the ratchet wheel and the limiting sleeve is improved, and the use reliability is further improved.

9. According to the utility model, the clamping ring adopts the matching of the two arc-shaped lantern ring scissors to complete the locking of the limiting sleeve, and the lifting force of the scissors mechanism is utilized, so that the speed change process of a user is more labor-saving, and unnecessary physical output is reduced.

10. According to the utility model, the stay wire and the flywheel set are made of special synthetic steel, so that the service life strength of the stay wire is improved, the weight of the flywheel set is reduced, and the lightweight of the bicycle is further realized.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a first schematic structural view of a flywheel for a bicycle incorporating the present invention;

FIG. 2 is a second structural schematic view of a freewheel for a bicycle incorporating the present invention;

FIG. 3 is a front elevational view of a freewheel for a bicycle incorporating the present invention;

FIG. 4 is an enlarged view of a portion "A" of FIG. 1 in accordance with the present invention;

FIG. 5 is an enlarged top view of "B" in FIG. 4 according to the present invention.

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 is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1:

in this embodiment, taking a flywheel applied to a bicycle as an example, as shown in fig. 1, the present invention provides a flywheel applied to a bicycle, including: the device comprises a main shaft 1, a ratchet 101 and a limit sleeve 2; two ratchet wheels 101 are sleeved on the outer wall of the main shaft 1, three rocker arms 4 are uniformly distributed on the outer wall of each ratchet wheel 101 in a circumferential manner, a rigid spring 401 is connected between the rocker arms 4, and free ends of the rocker arms 4 are connected with flywheel sets 402; the two ratchet wheels 101 are respectively provided with a limiting sleeve 2 in a fitting manner at one side, the limiting sleeves 2 and the ratchet wheels 101 are respectively limited through extension springs 103, and a clamping ring 3 is arranged at one side of each limiting sleeve 2; a first pull wire 403 is fixedly connected to the end part of the rocker arm 4 close to the flywheel set 402, the first pull wire 403 penetrates through the ratchet 101, and the free end of the first pull wire 403 is fixedly connected to the end part of the stop collar 2 close to the ratchet 101; one end of the clamping ring 3 is fixedly connected with a second pull wire 301, the second pull wire 301 is connected with the other end of the clamping ring 3 in a sliding manner, the end of the clamping ring 3 is connected with two connecting plates 306, a transverse plate and a screw rod 303 are arranged between the connecting plates 306, a part of the screw rod 303 above the transverse plate is fixedly connected with the second pull wire 301 through an auxiliary pull wire 302, a third pull wire 305 is sleeved outside the part of the screw rod 303 below the transverse plate, the third pull wire 305 penetrates through the connecting plates 306 and is connected with the connecting plates 306 in a sliding manner, and the end of the screw rod 303 far away from the transverse plate is fixedly connected with a limiting top post 304.

The utility model provides a speed-changing flywheel applied to a bicycle, which is arranged on a central shaft of a rear wheel of the bicycle, a pedal mechanism and the rear wheel are in transmission with a chain through the speed-changing flywheel, two groups of third pull wires 305 and second pull wires 301 included in the speed-changing flywheel are connected to a single speed changer, the speed changer is derived from the prior art, the structure of the speed changer is not described in detail, and in the driving process: and (3) accelerating operation: the rider drives the clamping ring 3 to work by pulling the two second pull wires 301, the locking of the limiting sleeve 2 is completed, the limiting sleeve 2 rotates, the first pull wire 403 is pulled to resist the elastic force of the rigid spring 401, the rocker arm 4 is tightened, the reduction of the diameter of the circle formed by the flywheel set 402 is further realized, namely the flywheel is reduced, the second pull wires 301 drive the auxiliary pull wires 302 to displace, the screw 303 is driven to rotate, the limiting top column 304 is driven to be far away from the gap between the limiting sleeve 2 and the ratchet 101, the limiting top column 304 is ensured not to influence the acceleration process, and the rider realizes acceleration by amplifying the power output by pedaling; and (3) speed reduction operation: by pulling the two third pull wires 305 in the bicycle, due to the fact that the screw 303 is in threaded fit with the transverse plate, and the third pull wires 305 are wound outside the screw 303, the screw 303 rotates relative to the transverse plate by pulling the third pull wires 305, the limiting top column 304 is further driven to be inserted into a gap between the limiting sleeve 2 and the ratchet 101, the limiting sleeve 2 and the ratchet 101 are separated, the limiting sleeve 2 rotates under the action of the first pull wires 403, the first pull wires 403 are released, the rocker arms 4 are released under the action of the rigid springs 401, and then the flywheel set 402 is displaced away from the main shaft 1, namely the circular diameter formed by the flywheel set 402 is enlarged, the flywheel is enlarged, a rider can reduce and save labor through the power output by pedaling, and the speed reduction is achieved.

Compared with the traditional multistage flywheel, the weight of the metal part in the bicycle is effectively reduced, and the light weight of the bicycle is further realized in competition, so that a user can obtain a higher transmission ratio; in addition, the multi-tooth ratchet wheel 101 is adopted, so that the speed of the utility model is more, the speed change is more stable, the pause feeling of a rider is lower, and the power output rate of the rider is effectively improved.

Preferably, in one preferred technical mode of the present embodiment, the rocker arm 4 is an "L" shaped connecting arm, and the middle connecting portion is rotatably connected through a rotating shaft.

Preferably, in one preferred mode of the present embodiment, the flywheel set 402 includes two sets of arc flywheels, wherein a single set of arc flywheels is synchronously displaced under the limit of the rocker arm 4.

Preferably, in one preferred technical mode of the present embodiment, the ends of the rigid spring 401 are fixedly connected with two connecting arms of the rocker arm 4 respectively.

Preferably, in one of the preferred technical modes of this embodiment, the stop collar 2 is formed by splicing two circular rings with different outer diameters and is in clearance fit with the main shaft 1.

Preferably, in one of the preferred technical modes of the embodiment, one side of the position limiting sleeve 2 close to the ratchet 101 is provided with position limiting teeth matched with the ratchet teeth 102.

Preferably, in one preferred technical aspect of the present embodiment, the first wire 403, the second wire 301, the third wire 305, and the auxiliary wire 302 are all made of synthetic steel 65 Mn.

Preferably, in one of the preferred technical means of this embodiment, a metal wear pad is disposed at a sliding connection position of the clamping ring 3 and the second pulling wire 301, and a compression spring is disposed at a connection position of two arc-shaped collars included in the clamping ring 3.

Preferably, in one preferred embodiment of the present invention, the two ratchet wheels 101 are respectively slidably disposed with respect to the main shaft 1, and the rocker arm 4 is made of synthetic steel 42 CrMo.

Example 2:

the present embodiment provides a bicycle speed changing flywheel applied to racing, and differs from embodiment 1 in that "two sets of second and third wire harnesses 301 and 305 in embodiment 1 are connected to the same transmission in an assembly manner; ", change to: "two second wires 301 to one derailleur and two third wires 305 to the other derailleur; ", so that two groups of six arc flywheels which correspond to each other work separately, and in the process of competition, a rider needs to accelerate sprinting, namely, the first transmission is controlled to complete the complete tightening of three rocker arms 4, namely, three corresponding arc flywheels are attached to the outer side of the ratchet wheel 101, the second transmission is controlled, compared with the accelerating working state of the embodiment 1, only three arc flywheels are used, a smaller flywheel diameter is obtained, namely, the power output by the rider through the pedals is further amplified through chain transmission to improve the traveling speed and the gear ratio of the bicycle, so that a user can conveniently obtain the limit speed in the sprint process, although the three arc gears which are evenly distributed in the circumference have gaps between the three arc gears, because of the even distribution and the smaller diameter, the abrasion to the chain is lower, so the safety performance is improved, and the falling injury of a rider caused by the breakage of the chain is avoided.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the utility model have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides a be applied to variable speed flywheel of bicycle, includes main shaft, ratchet and stop collar, its characterized in that: the outer wall of the main shaft is sleeved with two ratchet wheels, rocker arms are arranged on the outer walls of the ratchet wheels, rigid springs are connected between the rocker arms, and free ends of the rocker arms are connected with flywheel sets;

the two ratchet wheels are respectively provided with a limiting sleeve in a laminating manner at one side, the limiting sleeves are respectively limited with the ratchet wheels through extension springs, and clamping rings are arranged at one sides of the limiting sleeves;

a first pull wire is fixedly connected to the end part, close to the flywheel set, of the rocker arm, penetrates through the ratchet wheel, and the free end of the first pull wire is connected to the end part, close to the ratchet wheel, of the limiting sleeve;

one end of the clamping ring is connected with a second stay wire and two connecting plates, the second stay wire is connected with the other end of the clamping ring in a sliding manner, a transverse plate and a screw rod are arranged between the connecting plates, and the end part of the screw rod is fixedly connected with a limiting ejection column.

2. The speed-changing flywheel applied to a bicycle according to claim 1, wherein a portion of the screw rod above the transverse plate is fixedly connected with the second pull wire through an auxiliary pull wire, a portion of the screw rod below the transverse plate is sleeved with a third pull wire, the third pull wire penetrates through the connecting plate and is slidably connected with the connecting plate, the ratchet wheel is a circular ring body, and a ratchet is arranged on one side of the ratchet wheel, which is far away from the main shaft.

3. A flywheel for bicycle according to claim 1, wherein the rocker arm is an "L" shaped link arm and the middle connecting position is connected by a rotation shaft.

4. A variable speed flywheel for a bicycle according to claim 1 wherein the flywheel set comprises two sets of arcuate flywheels.

5. A flywheel for use in a bicycle according to claim 4, wherein the ends of said stiff spring are fixedly connected to the two connecting arms of said rocker arm, respectively.

6. A flywheel applied to speed change of a bicycle as claimed in claim 1, wherein the stop collar is formed by splicing two rings with different outer diameters and is in clearance fit with the main shaft.

7. A flywheel applied to speed change of bicycles as claimed in claim 2, wherein the side of the position-limiting sleeve close to the ratchet wheel is provided with a position-limiting tooth matching with the ratchet.

8. The flywheel applied to the bicycle as claimed in claim 1, wherein the clamping ring is formed by connecting two arc-shaped sleeve rings in a scissor fork mechanism, and an anti-slip rubber is bonded to one side of the clamping ring close to the limiting sleeve.

9. The flywheel of claim 2, wherein the first wire, the second wire, the third wire and the auxiliary wire are made of 65Mn steel, and the rocker arm is made of 42CrMo steel.

10. The flywheel applied to the bicycle of claim 1, wherein a rolling bearing is disposed between the main shaft and the ratchet wheel, the number of the first pull wires corresponds to the number of the rocker arms, a metal wear pad is disposed at a sliding connection position of the clamping ring and the second pull wire, and a compression spring is disposed at a connection position of two arc-shaped lantern rings included in the clamping ring.

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