CN202022293U - bicycle drive - Google Patents

Abstract

The utility model discloses a bicycle driving device, including a shell, a fixing base, a first clutch, a second clutch, a plurality of first drive assembly, a plurality of second drive assembly and an at least elastic component. The first clutch and the second clutch are combined with each other and then combined on the base body of the fixed base, so that the first clutch and the second clutch cannot rotate relatively, but can rotate relatively by the base body, and in the relative rotation process, the brake plate arranged on the second clutch limits the first driving component and the second driving component, so that the first driving component and the second driving component are controlled to simultaneously resist the tooth socket of the shell, the shell can bidirectionally drive the fixed base, and the first driving component or the second driving component can also be controlled not to simultaneously resist the tooth socket of the shell, so that the shell can drive the fixed base in a clockwise or anticlockwise one-way mode, thereby facilitating the switching between the one-way driving mode and the two-way driving mode.

Description

bicycle drive

technical field

The utility model relates to a bicycle driving device, in particular to a driving device which is installed on the rear wheel shaft of the bicycle so that users can conveniently adjust the two-way driving wheel shaft or the one-way driving wheel shaft.

Background technique

A general bicycle transmission mechanism includes a front sprocket and a rear sprocket. The front sprocket is arranged at the front of the vehicle frame, and a pedal is connected to both ends of the central shaft. When the rider steps on the pedals, the front sprocket can be driven to rotate. The rear sprocket is located on the hub side of the rear wheel, and the rear sprocket and the front sprocket are combined into a chain; when the rider steps on the pedal to drive the front sprocket to rotate, the chain drives the rear sprocket to rotate synchronously, thereby making the rear sprocket rotate. The rear wheel fixed to the rear sprocket rotates to drive the bicycle forward; the bicycle with the speed change function uses a plurality of rear sprocket groups of different diameters to form a stage shape, and the chains are switched to different diameters to produce the required speed. speed ratio. In other words, a general bicycle is driven by a driving device provided on a rear wheel axle.

Existing bicycle driving devices generally include two types: the first is a one-way driving device, the second is a two-way driving device, and the two cannot be installed simultaneously. The structure of the one-way drive device is to set a one-way ratchet mechanism inside the hub of the rear sprocket. When the user rides the bicycle, he can only step on the pedal forward to drive the wheel shaft to rotate forward; The ratchet mechanism makes the rear wheel shaft idling and cannot be driven. This is one of the designs for general bicycles that provide users with energy-saving riding.

The two-way drive device is that there is no one-way ratchet mechanism inside the hub of the rear sprocket, but the hub is directly connected to the rear sprocket. When the user is riding a bicycle, no matter whether he pedals forward or backward, it can drive The axle rotates forward or backward; in other words, the ratio of pedal to rear wheel rotation is 1:1, which is suitable for use in the field of sports or acrobatics.

The "FIXED GEAR" (fixed gear) bicycle that is popular in the field of bicycle sports at present is a kind of one-way ratchet mechanism that is not provided with, the rotation ratio of the pedal and the rear wheel is 1: 1, and there is no setting. The design of the bicycle device; when the user rides this kind of bicycle, he can stop stepping on the pedal at an appropriate time to fix the rear wheel deadlock, The car only uses the inertia of the bicycle to make the tires rub against the ground to make the car move forward, so the user can use the bicycle to make some stunts to achieve special sports effects.

车装置又存在一定的危险性，因此大都适合在特定场地骑乘，使用者将该种自行车从家中骑至该特定场地的路途不仅没有效率，也容易因为路况多变化而发生潜在危险。基于此，目前有些“FIXED GEAR”自行车在后车轮的轮轴两侧分别设置单向棘轮机构与不设置单向棘轮机构，使用者欲将该“FIXED GEAR”自行车做为一般省力型自行车骑乘时，可以将后车轮一侧的单向棘轮机构与链条连接以带动其单向旋转；当到达特定场地欲做为“FIXED GEAR”自行车使用时，则可将后车轮卸下并转换方向，再将链条连接后车轮另一侧没有设置单向棘轮机构的链轮。Since a bicycle without a one-way ratchet mechanism is strenuous to ride, there is no

There is a certain risk in the bicycle device, so most of them are suitable for riding in a specific place. The user rides this kind of bicycle from home to the specific place. Based on this, at present some "FIXED GEAR" bicycles are provided with one-way ratchet mechanism and not provided with one-way ratchet mechanism respectively on both sides of the wheel axle of the rear wheel. , you can connect the one-way ratchet mechanism on one side of the rear wheel with the chain to drive it to rotate in one direction; when you arrive at a specific place and want to use it as a "FIXED GEAR" bicycle, you can remove the rear wheel and change the direction, and then put it on The chain wheel on the other side of the wheel after the chain is connected is not provided with a one-way ratchet mechanism.

Although the above-mentioned latest "FIXED GEAR" bicycle can change the driving mode of the rear wheel; it is very inconvenient because the rear wheel must be removed and reinstalled after changing the direction.

Utility model content

The purpose of this utility model is to solve the existing "FIXEDGEAR" bicycle that can change the driving mode. When the driving mode is changed, the trouble and inconvenience that the rear wheel must be unloaded and reinstalled after changing the direction.

The utility model is characterized in that the rear wheel axle of the bicycle is provided with a drive device that can switch the one-way or two-way drive mode by the rotation mode.

The technical means of the utility model includes a shell, a fixed seat, a first clutch, a second clutch, a plurality of first drive components, a plurality of second drive components and at least one elastic component; the inner diameter of the shell is provided with multiple a protruding tooth, and a tooth groove is formed between the two protruding teeth; the first driving component, the second driving component and the elastic component are combined behind the fixing seat, and the first driving component and the second driving component are made use of the elastic force of the elastic component to make the first driving component and the second driving component In the natural state without external force, it is in a tilted state; the first clutch and the second clutch are combined with each other and then combined with the seat body of the fixed seat, so that the first clutch and the second clutch cannot rotate relative to each other, but the first clutch and the second The clutch can rotate relative to the seat body. During the relative rotation, the first driving component and the second driving component are restricted by the brake plate arranged on the second clutch, and then the first driving component and the second driving component are controlled to resist simultaneously. The tooth grooves of the casing enable the casing to drive the fixing seat bidirectionally, and also control the first driving component or the second driving component not to resist the tooth grooves of the casing at the same time, so that the casing can drive the fixing seat unidirectionally clockwise or counterclockwise.

In the utility model, a plurality of bumps and a plurality of axially extending grooves adjacent to both sides of the bumps are arranged on the outer diameter of the fixing seat, and one end of the first driving component and the second driving component has a movable joint. On the support portion of the groove, the protrusion is provided with at least one radial groove, the first driving component and the second driving component are provided with a groove, the aforementioned elastic component is ring-shaped, and the ring-shaped elastic The components are combined in the groove of the protrusion and the grooves of the first driving component and the second driving component, so that the first driving component and the second driving component are installed on the outer diameter of the fixed base.

As a preferred embodiment, the utility model is provided with a plurality of blocks around the first clutch, and each block is provided with a plurality of positioning teeth, and the fixed seat is provided with at least one positioning protrusion, and the positioning protrusion cooperates with As for the positioning teeth, when the fixed base and the first clutch rotate relative to each other, the positioning convex part elastically jumps between the positioning teeth, so as to assist in sensing switching to a one-way or two-way driving mode.

As a preferred embodiment, the utility model is provided with an inner concave edge on one side of the through hole of the second clutch, the inner concave edge is provided with at least one positioning block, and the outer diameter of the first clutch is provided with a stopper The stop edge is provided with at least one pair of positioning notches that can be engaged with each other by the positioning block, and the engagement of the positioning block and the positioning notch makes the first clutch and the second clutch form a fixed position after being combined and cannot be opposed to each other. rotate.

The utility model is provided with a flange on the fixed seat, and the flange is provided with a limit notch, and the second clutch is provided with a limit protrusion fitting in the limit notch to provide the first clutch and the second clutch. The limit of the clockwise or counterclockwise rotation angle of the second clutch relative to the fixed seat.

In the utility model, an external thread is provided on the outer diameter of the seat of the fixed seat. After the seat body is assembled in the shell from one side of the shell, an outer cover with internal thread is used to lock the external thread from the other end of the shell. , and then combine the fixing seat with the shell.

The utility model can be provided with inner edges on opposite sides of the inner diameter of the shell, and between the second clutch side and the inner edge of one side of the shell, and between the outer cover side and the inner edge of the other side of the shell, respectively. A plurality of balls are provided to provide smooth rotation of the housing relative to the second clutch and the outer cover.

Description of drawings

Fig. 1 is a perspective view of an embodiment showing the appearance structure of the driving device of the present invention.

Fig. 2 is an exploded perspective view of an embodiment showing the combination relationship of the main components of the drive device of the present invention.

Fig. 3 is a schematic plan view showing an embodiment of the housing structure of the driving device of the present invention.

4A and 4B respectively show a front view and a schematic side view of the fixing seat structure of the driving device of the present invention.

Fig. 5 is a schematic plan view showing an embodiment of the structure of the first clutch of the driving device of the present invention.

6A and 6B respectively show a front view and a schematic side view of the structure of the second clutch of the driving device of the present invention.

FIG. 7A and FIG. 7B respectively show a front view and a schematic top view of the driving assembly structure of the driving device of the present invention.

8A and 8B respectively show a front view and a schematic side view of the outer cover structure of the driving device of the present invention.

FIG. 9A and FIG. 9B respectively show a schematic view of an embodiment in which the rotating drive device of the present invention is adjusted so that the housing can drive the fixed seat to rotate in both directions.

FIG. 10A and FIG. 10B respectively show schematic diagrams of an embodiment in which the driving device of the present invention is adjusted to rotate the housing to drive the fixing seat to rotate counterclockwise.

FIG. 11A and FIG. 11B are respectively schematic diagrams showing an embodiment in which the rotating drive device of the present invention is adjusted so that the housing can drive the fixing seat to rotate clockwise.

Detailed ways

The implementation of the present utility model will be described in more detail below in conjunction with the drawings and component symbols of the specification, so that those skilled in the art can implement it after studying the specification.

Referring to Fig. 1 and shown in Fig. 2, for the bicycle driving device that the utility model provides, its preferred embodiment includes: a housing 1, a holder 2, a first clutch 3, a second clutch 4, a plurality of A first driving component 5A, a plurality of second driving components 5B, at least one elastic component 6 , a plurality of balls 7 and an outer cover 8 . Referring to Fig. 2 and Fig. 3 at the same time, wherein, the housing 1 has a circular cylinder 11, the outer diameter of the cylinder 11 can be distributed with a plurality of sprockets 12 to form a sprocket, and the inner diameter of the cylinder 11 is provided with a plurality of protrusions. Teeth 13, a tooth groove 14 is formed between the two protruding teeth 13; inner edges 15 are provided on the opposite sides of the inner diameter of the shell 1, and a plurality of balls 7 can be placed on the inner edges 15 on both sides of the shell 1.

Referring to Fig. 2, Fig. 4A and Fig. 4B, the fixed seat 2 of the present invention has a cylindrical seat body 21, the outer diameter of the seat body 21 is provided with an external thread 24, and the outer diameter of the seat body 21 is provided with multiple A projection 22 that is equiangularly distributed, the same position of each projection 22 is provided with a radial groove 221; Extended arc-shaped groove 23; the end surface of the fixed seat 2 is provided with a plurality of axially protruding and equiangularly distributed positioning protrusions 27; the fixed seat 1 is provided with a flange 25, and the flange 25 is provided with a stop of an appropriate length The notch 26; the inner diameter of the seat body 21 is provided with an internal thread 28 for locking on the bicycle rear axle (not shown).

Referring to Fig. 2 and Fig. 5, the first clutch 3 of the present utility model is an annular body with a central hole 30, and a plurality of blocks 31 distributed at equal angles are arranged on the periphery of the annular body, each block 31 is provided with a plurality of positioning teeth 311 that can engage with the aforementioned positioning protrusions 27; the periphery of the first clutch 3 is provided with a plurality of positioning notches 321;

Referring to Fig. 2, Fig. 6A and Fig. 6B, the second clutch 4 of the present invention is an annular body with a through hole 40, and a plurality of axially protruding braking plates 41 are arranged around the annular body; One side of the inner diameter of the second clutch 4 is formed with an inner concave edge 41, and the inner concave edge 41 is provided with a plurality of positioning blocks 421 protruding axially and corresponding to the positioning notches 321 of the first clutch 3; An arc concave edge 43; the appropriate position of the inner diameter of the second clutch 4 is also provided with a limit protrusion 44 used to fit in the limit notch 26 of the fixed seat 2, so as to provide the first clutch 3 and the second clutch 4 relative to each other. The limit of the angle of rotation of the fixed seat 2 clockwise or counterclockwise.

Referring to Fig. 2, the first driving assembly 5A and the second driving assembly 5B of the present utility model have the same structure, except that the direction in which the two are installed on the seat body 21 of the fixed seat 2 is opposite and symmetrical; Fig. 7A and FIG. 7B only uses the first drive assembly 5A to illustrate in detail. The first driving assembly 5A has a pawl body 51, and one end of the pawl body 51 has a supporting portion 52 forming an arc surface for movably fitting the groove 23 on the outer diameter of the seat body 11. The pawl body The other end opposite to 51 is a slightly pointed resisting end 511 , and a groove 53 is formed on the outer surface of the ratchet body 51 in the length direction.

In the embodiment of the present invention, the elastic component 6 is ring-shaped, and its cross-sectional diameter can be accommodated in the groove 221 of the protrusion 22 and the slot 53 of the first driving component 5A and the second driving component 5B.

FIG. 2 , FIG. 8A and FIG. 8B show that the inner diameter of the outer cover 8 of the present invention is provided with an internal thread 81 , and a second arc-shaped concave edge 82 is formed on the periphery of one side of the outer cover 8 .

The combination of the aforementioned components is to put the supporting parts 52 of the first driving component 5A and the second driving component 5B into the groove 23 of the seat body 21 of the fixed seat 2 respectively, so that the first driving component 5A and the second driving component After the component 5B is symmetrical, the elastic component 6 is inserted into the groove 221 of the protrusion 22, and the groove 53 of the first driving component 5A and the second driving component 5B, and the elastic force of the elastic component 6 is applied to the first driving component 5A and the second driving component 5B, the ratchet bodies 51 of the first driving component 5A and the second driving component 5B are inclined at an angle, that is, the resisting end 511 faces the direction opposite to the outer surface of the seat body 21 . After the first driving assembly 5A and the second driving assembly 5B are assembled on the fixed seat 2, the seat body 21 is sequentially passed through the center hole 30 of the first clutch 3 and the through hole 40 of the second clutch 4, and then the seat body 21 is passed through the through hole 40 of the second clutch 4, so that the The positioning protrusion 27 of the seat 2 is engaged with the positioning tooth 311 of the first clutch 3, and the positioning block 421 is engaged with the positioning notch 321, so that the positioning block 42 and the positioning notch are connected between the first clutch 3 and the second clutch 4. 321 are engaged and cannot rotate relative to each other, but because the central hole 30 and the through hole 40 are movably matched with the base body 21, the first clutch 3 and the second clutch 4 can be synchronized with the base body 21 for relative rotation. When the first clutch 3 and the second clutch 4 rotate clockwise or counterclockwise synchronously, the brake plate 41 moves accordingly, and then can apply force to the first drive assembly 5A or the second drive assembly 5B, so that the first drive assembly One of the 5A or the second drive assembly 5B is pressed into the bottom of the brake plate 41 , or neither the first drive assembly 5A nor the second drive assembly 5B is pressed into the bottom of the brake plate 41 .

After inserting a plurality of balls 7 into the inner edge 15 of one side of the casing 1, the fixed seat 2, the first clutch 3, the second clutch 4, the first driving assembly 5A and the second driving assembly 5B completed in the aforementioned combination are removed from the casing together. One side of the housing 1 penetrates into its inner diameter, so that the balls 7 contact the inner edge 15 and the first arc concave edge 43 of the second clutch 4; Lock the internal thread 81 of the outer cover 8 to the external thread 24 of the seat body 21 passing through the housing 1, and then make the ball 7 contact the inner edge 15 and the second arc concave edge 82 to complete the assembly of the driving device of the present invention. The internal thread 28 of the fixed seat 2 is then used to be locked on the rear axle of the bicycle.

Figure 9A and Figure 9B show the operation mode of the utility model when the bicycle is in bidirectional driving mode, in order to rotate the first clutch 3 and the second clutch 4 at the same time, so that the positioning convex part 27 is displaced to the The middle position of the positioning tooth 311, at this time, the first driving component 5A and the second driving component 5B are not restricted by the brake plate 41 and can use the elastic force of the elastic component 6 to make the ratchet body 51 tilt up, and then make it resist the end. 511 against the tooth groove 14 of the casing 1, therefore, when the sprocket 12 of the casing 1 is driven clockwise or counterclockwise by the chain (not shown), it can drive the fixed seat 2 connected to the rear axle clockwise or counterclockwise The hour hand rotates.

Fig. 10A and Fig. 10B show the operation mode of the utility model when the bicycle is driven in the counterclockwise mode, in order to rotate the first clutch 3 and the second clutch 4 at the same time, so that the positioning convex part 27 is displaced after a plurality of positioning teeth 311 elastically jump To the right end position of the positioning tooth 311, the second drive assembly 5B is restricted by the brake plate 41 and pressed into the bottom of the brake plate 41, but the first drive assembly 5A is not restricted by the brake plate 41 and can use the elastic assembly 6 The elastic force makes the ratchet body 51 tilt up, and then makes the resisting end 511 against the tooth groove 14 of the housing 1. Therefore, when the sprocket 12 of the housing 1 is driven counterclockwise by the chain, it can drive the fixed joint connected to the rear axle. The seat 2 rotates counterclockwise; but when the sprocket 12 of the housing 1 is driven clockwise by the chain, the first driving component 5A does not resist the tooth groove 14, so idling occurs.

Fig. 11A and Fig. 11B show the operation mode of the utility model when the bicycle is driven in a clockwise mode, in order to rotate the first clutch 3 and the second clutch 4 at the same time, so that the positioning convex part 27 is displaced after a plurality of positioning teeth 311 elastically jump To the left end position of the positioning tooth 311, at this moment, the first drive assembly 5A is restricted by the brake plate 41 and is pressed into the bottom of the brake plate 41, but the second drive assembly 5B is not restricted by the brake plate 41 and can use the elastic assembly 6 The elastic force makes the ratchet body 51 tilt up, and then makes the resisting end 511 against the tooth groove 14 of the housing 1. Therefore, when the sprocket 12 of the housing 1 is driven clockwise by the chain, it can drive the fixed joint connected to the rear axle. The seat 2 rotates clockwise; but when the sprocket 12 of the casing 1 is driven counterclockwise by the chain, the second driving component 5A does not resist the tooth groove 14, so idling occurs.

The above descriptions are only preferred embodiments for explaining the utility model, and are not intended to limit the utility model in any form. Therefore, any modifications made under the spirit of the same utility model Or changes, all should still be included in the category that the utility model intends to protect.

Claims (7)

1. A bicycle driving device, characterized in that, comprising: A circular shell with a plurality of protruding teeth on its inner diameter, and a tooth groove is formed between the two protruding teeth; A fixing base has a base body, and the end surface of the fixing base is provided with at least one positioning protrusion; A plurality of first drive components and second drive components with resisting ends, the first drive components and the second drive components are arranged in pairs and in opposite directions on the outer diameter of the seat; At least one elastic component is arranged on the seat body of the fixed seat, and the elastic force of the elastic component causes the first driving component and the second driving component to incline the resisting end at an angle in a natural state without external force facing in the direction opposite to the base; A first clutch, which is an annular body, and the periphery of the annular body is provided with a plurality of positioning teeth that can engage with the positioning protrusion; A second clutch, which is an annular body with a through hole, and a plurality of braking plates are arranged on the periphery of the annular body; The first clutch and the second clutch are combined with each other and then combined with the seat body of the fixed seat, so that the first clutch and the second clutch cannot rotate relative to each other, but the first clutch and the second clutch can be opposite to the seat body Rotation, during relative rotation, the positioning protrusion bounces elastically between the positioning teeth, cooperates with the restriction of the brake plate on the first driving component and the second driving component, and then controls the first driving component and the second driving component The two driving components simultaneously resist the cogging of the housing, so that the housing can drive the fixed seat bidirectionally, or control the first driving component or the second driving component not to resist the cogging of the housing at the same time, so that the housing can drive the fixing seat in one direction fixed seat. 2. The bicycle driving device according to claim 1, wherein the outer diameter of the fixed seat is provided with a plurality of protrusions and a plurality of axially extending grooves adjacent to both sides of the protrusions, so that One end of the first driving component and the second driving component has a supporting portion for movably fitting in the groove, the protrusion is provided with at least one radial groove, and the first driving component and the second driving component The assembly is provided with a slot, and the elastic assembly is ring-shaped, and the ring-shaped elastic assembly is combined in the groove of the protrusion, and in the slot of the first driving assembly and the second driving assembly. 3. The bicycle driving device according to claim 1, wherein a plurality of blocks are arranged around the first clutch, and each block is provided with a plurality of positioning teeth. 4. The bicycle driving device as claimed in claim 1, characterized in that, one side of the central hole of the second clutch is provided with an inner concave edge, and the inner concave edge is provided with at least one positioning block, and the first clutch The outer diameter is provided with a stop edge, and the stop edge is provided with at least one pair of positioning notches that can engage with each other for the positioning block. 5. The bicycle driving device according to claim 1, wherein the fixed seat is provided with a flange, and the flange is provided with a limiting notch, and the second clutch is provided with a stop fitting in the limiting notch. Limiting protrusion. 6. The bicycle driving device as claimed in claim 1, wherein the outer diameter of the holder is provided with external threads, and after the seat body is assembled in the casing from one side of the casing, it is formed by a The outer cover of the outer cover locks the outer thread from the other end of the outer shell, and then combines the fixing base with the outer shell. 7. The bicycle driving device as claimed in claim 1, characterized in that, inner edges are provided on two opposite sides of the inner diameter of the housing, between one side of the second clutch and the inner edge of one side of the housing, and the A plurality of balls are arranged between one side of the outer cover and the inner edge of the other side of the shell.

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