TW201604074A - Chain wheel assembly and chain wheel device using it - Google Patents

Abstract

The present invention provides a chain wheel assembly and chain wheel device using it, wherein the chain wheel device includes a driver, a switching sleeve, plural chain wheels with different diameter sizes, plural connectors, and a fastener. Therein, the driver is connected to a wheel hub of a back wheel of a bicycle for transmitting torque. One end of the switching sleeve is screwed to the driver. The chain wheels, axially arranged from the largest one to the smallest one, are disposed in a direction from the driver toward the switching sleeve, with a sprocket disposed on the periphery of each chain wheel, respectively, for optionally engaging a chain. The connectors are coupled between each two of the chain wheels, respectively. The fastener is screwed to the other end of the switching sleeve for axially fixing the switching sleeve.

Description

Sprocket assembly and sprocket device using the same

The present invention relates to a sprocket, and more particularly to a sprocket assembly and a sprocket assembly using the sprocket assembly for mounting to a wheel hub of a bicycle rear wheel.

According to the wheel hub of the bicycle rear wheel, a plurality of sprocket wheels of different diameters are mounted, and the chain can be selectively engaged with one of the sprocket wheels through the derailleur to achieve different gear ratios.

No. DE 10 2012 006 771.2, which has a sprocket assembly 12 having a plurality of sprocket wheels 14 ₁ to 14 ₁₀ of different diameters and different numbers of teeth, wherein the largest diameter sprocket 14 _{10 is} engaged with the actuator At one end of the 16th, the remaining smallest diameter sprockets 14 ₁ to 14 ₆ are relatively engaged with the externally threaded structure 22 and the internal thread 30, and the axially positioned portion of the actuator 16.

However, as shown in the patent drawings, the sprocket wheels 14 ₁ to 14 ₁₀ are one-piece, one-piece type, which is relatively expensive to manufacture and is cumbersome and lightweight, as compared with the method of manufacturing a sprocket using a general single sheet. The effect.

In order to solve the above problems, the present invention discloses a sprocket assembly and a sprocket device using the sprocket assembly, wherein the sprocket combination system is sequentially stacked by a plurality of sprocket wheels of different diameters, and each The sprocket is made of a single flat material to reduce the manufacturing cost; further, a connecting member is provided between each two sprockets for transmitting the torque applied to each sprocket to the adjacent sprocket On, in order to achieve the purpose of dispersion.

Therefore, in order to achieve the foregoing object, the present invention provides a sprocket assembly, which is mounted on a sprocket mounting assembly, and the sprocket mounting assembly is mounted on a wheel hub of a bicycle rear wheel for sprocket assembly Engaging a chain, wherein the sprocket assembly comprises: a plurality of sprocket wheels of different diameters, which are axially stacked on the sprocket mounting assembly from large to small, and each of the sprocket wheels has a chain tooth for Selectively engaging the chain; and a plurality of connectors are respectively annularly coupled between each of the two sprockets.

In order to achieve the foregoing object, the present invention also provides a sprocket device for a bicycle rear wheel. The sprocket device includes: a driving body coupled to a wheel hub of a bicycle rear wheel for transmitting torque; The sleeve is screwed to the driving body at one end; a plurality of sprocket wheels of different diameters are stacked from the driving body to the adapter sleeve from the large to the small axial direction, and the peripheral edges of the sprocket wheels respectively have a chain tooth. For selectively engaging a chain; a plurality of connecting members are respectively annularly coupled between each of the two sprockets; and a fastener is screwed to the other end of the adapting sleeve for axial fixing Adapter sleeve.

Preferably, each of the connectors of the present invention is formed by a metal strip.

Preferably, the connecting members of the present invention are disposed between every two adjacent sprockets from large to small.

Preferably, each of the sprocket wheels of the present invention is provided with a plurality of coupling holes, and the two sides of each of the connecting members are respectively engaged with the coupling holes, and the coupling holes are a perforation, and more preferably a circle. hole.

Preferably, each of the connecting members of the present invention has a plurality of blocks protruding equidistantly on both sides for engaging the engaging holes.

Preferably, the card blocks of the present invention are bilaterally symmetrical, and each of the blocks is rectangular, and the long sides of each of the blocks are arranged along the rotation direction of the sprocket.

Preferably, the sub-large diameter sprocket to the sub-small diameter sprocket of the present invention are slid through the two connecting members and the sprocket on both sides.

Thereby, the sprocket combination system is made of a plurality of sprocket wheels in a single flat material instead of being integrally formed, so that the manufacturing cost can be reduced, and further, the connecting members are respectively annularly coupled between each two sprocket wheels. In this way, the torque acting on each sprocket can be dispersed through the connected sprocket to strengthen the sprocket assembly's ability to withstand high torque.

For the convenience of the description, the central idea expressed by the present invention in the column of the above summary of the invention is expressed by the specific embodiments. The various items in the embodiments are set forth in proportion to the description and not in the

As shown in FIGS. 1 to 3, the sprocket device 100 of the present invention is an 11-segment shifting system for providing a better transmission effect. The sprocket device 100 includes a sprocket mounting assembly 1 and a sprocket assembly 2. The sprocket assembly 2 is mounted on the sprocket mounting assembly 1 and the sprocket mounting assembly 1 is mounted on a wheel hub of a bicycle rear wheel for selectively engaging a chain of the sprocket assembly 2, wherein the sprocket The mounting assembly 1 includes a driving body 10, an adapter sleeve 20 and a fastener 30, and the sprocket assembly 2 is composed of a plurality of sprocket wheels 40-48 of different diameters and a plurality of connecting members 60.

The driving body 10 is a conventional member and has a cylindrical shape, as shown in FIG. 5, and the driving body 10 has a first external thread 12 having a first spline 11 and a side thereof on the periphery, and the driving body 10 is A wheel hub coupled to the rear wheel of the bicycle for transmitting torque. Wherein, the inside of the driving body 10 has two bearings 50 at appropriate places to be supported on the rear wheel axle of the bicycle.

The adapter sleeve 20 is provided with a second spline 21 at the periphery. Further, the adapter sleeve 20 is respectively provided with a first internal thread 22 and a second internal thread 23 at both ends, as shown in FIG. The first internal thread 22 of the adapter sleeve 20 is screwed to the first external thread 12 .

As shown in FIG. 7, the fastener 30 has a second external thread 31 for screwing on the second internal thread 23 of the adapter sleeve 20 for axially fixing the adapter sleeve 20, and the fastener 30 The circumference has two small-diameter sprockets 32, 33, and the outer diameter of the small-diameter sprockets 33 is small, and the peripheral edges of the two small-diameter sprockets 32, 33 have the fastener elements 321, 331.

As shown in FIG. 2 to FIG. 4, the sprocket wheels 40-48 are axially stacked on the sprocket mounting assembly 1 from large to small. Preferably, the sprocket wheels 40-48 are axially large to small. The driving body 10 is stacked on the adapter sleeve 20, wherein the sprocket 40 has a larger diameter, the sprocket 48 has the smallest diameter, and the sprocket 48 corresponds to the two small-diameter sprockets 32, 33 of the fastener 30, and the small diameter The sprocket wheels 32, 33 are smaller in diameter than the sprocket 48. In the present invention, the sprocket wheels 40-48 are respectively made of a single plate, and each of the sprocket wheels 40-48 has a concave-convex engaging hole 400 for the maximum and the second largest diameter sprocket 40, 41 card. The first splines 11 of the driving body 10 are coupled to the first splines 11 of the adapter body 10, and the sprocket wheels 42-48 are sequentially mounted to the second splines 21 of the adapter sleeve 20.

The sprocket 40~48 is provided with a chain tooth 401~481 for selectively engaging the chain, and the sprocket 40~48 is provided with a plurality of coupling holes 402~482, and the coupling holes 402~482 are annularly arranged. And implemented as a circular hole in the present invention, and further a perforation. It is worth mentioning that, except for the sprocket 40 of the largest diameter and the sprocket 48 of the smallest diameter, the other sprocket wheels 41-47 have two coupling holes 412-472.

As shown in FIG. 8A and FIG. 8B, each connecting member 60 is cut by a wire-cutting method through a continuous metal strip, and is fixed by welding at both ends of the connecting member 60, and is divided by a large to small ring. It is wound around each of the two sprockets 40~48. Each of the connecting members 60 is equidistantly disposed on the two sides of the connecting member 60 to be latched on the connecting holes 402-482, and the card 61 is bilaterally symmetrical, and each card is The long sides of the block 61 are arranged along the direction of rotation of the sprockets 40-48 so that each of the blocks 61 has a better structural strength to withstand the torque. In addition, the coupling holes 422 to 472 of the largest circle of the sprocket wheels 42 to 47 correspond to the coupling holes 412 to 462 of the smallest circle of the adjacent and larger diameter sprocket wheels 41 to 46 and are located on the same axis, and the sprocket The coupling hole 412 of the largest circle of 41 corresponds to only the coupling hole 402 of the sprocket 40 and is located on the same axis, and the coupling hole 482 of the sprocket 48 corresponds to the coupling hole 472 of the smallest circle of the sprocket 47 and is located on the same axis. In order to facilitate the aforementioned plurality of connecting members 60, according to the present invention, the second large diameter sprocket 41 to the second small diameter sprocket 47 have two connecting members 60 and the sprocket 40 on the left and right sides. ~48 card positioning.

Thereby, the sprocket assembly 2 is made of a plurality of sprocket wheels 40 to 48 in a single flat material instead of being integrally formed, so that the manufacturing cost can be reduced, and further, each sprocket has between 40 and 48 The connecting member 60 is annularly coupled between each of the two sprockets through the connecting member 60, so that the torque acting on each of the sprockets 40~48 can be dispersed and transmitted through the connected sprockets, thereby strengthening The sprocket assembly 2 is capable of high torque.

While the invention has been described in terms of a preferred embodiment, the various embodiments may The above embodiments are merely illustrative of the invention and are not intended to limit the scope of the invention. All modifications or changes made without departing from the spirit of the invention are within the scope of the invention.

100‧‧‧Sprocket device
2‧‧‧Sprocket assembly
11‧‧‧First Spline
20‧‧‧Adapter sleeve
22‧‧‧First internal thread
30‧‧‧fasteners
32, 33‧‧‧ small diameter sprocket
40~48‧‧‧Sprocket
401~481‧‧‧ sprocket
50‧‧‧ bearing
61‧‧‧ card block
1‧‧‧Sprocket mounting components
10‧‧‧ Driver
12‧‧‧First external thread
21‧‧‧Second spline
23‧‧‧Second internal thread
31‧‧‧Second external thread
321, 331‧‧‧ sprocket
400‧‧‧Snap hole
402~482‧‧‧bond hole
60‧‧‧Connecting parts

[Fig. 1] is an exploded view of the present invention. Fig. 2 is a sectional view showing a combination of the present invention. [Fig. 3] is an enlarged schematic view of Fig. 2. Fig. 4 is a side view of the sprocket assembly of the present invention, but does not include a sprocket of a minimum diameter. Fig. 5 is a schematic view showing the appearance of a driving body of the present invention. Fig. 6 is a cross-sectional view showing the adapter sleeve of the present invention. Fig. 7 is a side view of the fastener of the present invention. Fig. 8A is a schematic view showing the appearance of the connector of the present invention. [Fig. 8B] is a schematic view showing the appearance of the connector of the present invention, and the connector is not yet looped.

100‧‧‧Sprocket device

1‧‧‧Sprocket mounting components

2‧‧‧Sprocket assembly

10‧‧‧ Driver

11‧‧‧First Spline

12‧‧‧First external thread

20‧‧‧Adapter sleeve

21‧‧‧Second spline

23‧‧‧Second internal thread

30‧‧‧fasteners

31‧‧‧Second external thread

32, 33‧‧‧ small diameter sprocket

40~48‧‧‧Sprocket

400‧‧‧Snap hole

472‧‧‧bond hole

482‧‧‧bond hole

60‧‧‧Connecting parts

Claims (25)

A sprocket assembly is mounted on a sprocket mounting assembly, and the sprocket mounting assembly is mounted on a wheel hub of a bicycle rear wheel for engaging the sprocket assembly with a chain, wherein the sprocket The assembly includes: a plurality of sprocket wheels of different diameters, which are axially stacked on the sprocket mounting assembly from large to small, each of the sprocket wheels having a chain tooth for selectively engaging the chain; A plurality of connectors are respectively annularly coupled between each of the two sprockets. The sprocket assembly according to claim 1, wherein each of the connecting members is wound by a metal strip. The sprocket assembly according to claim 1, wherein the connecting members are disposed between every two adjacent sprocket wheels as large as small. The sprocket assembly according to claim 1, wherein each sprocket is provided with a plurality of coupling holes, and the two sides of each connector are respectively latched to the coupling holes. The sprocket assembly of claim 4, wherein the coupling holes are each a perforation. The sprocket assembly according to claim 4, wherein each of the connecting members is equidistantly protruded on the two sides to form a plurality of blocks for engaging the coupling holes. The sprocket assembly according to claim 6, wherein the blocks are bilaterally symmetrical. The sprocket assembly according to claim 6, wherein the blocks are rectangular, and the coupling holes are circular holes. The sprocket assembly according to claim 8, wherein the long sides of each of the blocks are arranged along the rotation direction of the sprocket. The sprocket assembly according to claim 1, wherein the second largest diameter sprocket to the second small diameter sprocket are slid through the two connecting members and the sprocket on both sides. A sprocket device is mounted on a bicycle rear wheel. The sprocket device comprises: a driving body coupled to a wheel hub of the bicycle rear wheel for transmitting torque; and an adapter sleeve which is screwed at one end The plurality of sprocket wheels of different diameters are stacked from the driving body to the adapter sleeve from large to small axial direction, and each of the sprocket wheels has a chain tooth for selective Engaging a chain; a plurality of connecting members are respectively annularly coupled between each of the two sprockets; and a fastener is screwed to the other end of the adapting sleeve for axially fixing the transfer Sleeve. The sprocket device of claim 11, wherein the periphery of the driving body has a first spline for the sprocket of the largest diameter and the second largest diameter. The sprocket device of claim 12, wherein the first spline has a first external thread on one side, and the adapter sleeve is respectively provided with a first internal thread and a second internal thread at both ends. The first internal thread is screwed to the first external thread. The sprocket device of claim 12, wherein the circumference of the adapter sleeve has a second spline system for the remaining sprocket. The sprocket device of claim 13, wherein the fastener has a second external thread that is threaded from the second internal thread of the adapter sleeve. The sprocket device of claim 11, wherein the fastener periphery has two small-diameter sprockets having an outer diameter smaller than a minimum of the sprockets. The sprocket device of claim 11, wherein each of the connecting members is wound by a metal strip. The sprocket device according to claim 11, wherein the connecting members are disposed between every two adjacent sprockets from large to small. The sprocket device of claim 11, wherein each sprocket is provided with a plurality of coupling holes, and two sides of each connector are respectively latched to the coupling holes. The sprocket device of claim 19, wherein the plurality of coupling holes are each a perforation. The sprocket device of claim 19, wherein each of the connecting members is equidistantly disposed on the two sides of the plurality of latching blocks for engaging the engaging holes. The sprocket device of claim 21, wherein the blocks are bilaterally symmetrical. The sprocket device of claim 21, wherein the blocks are rectangular, and the coupling holes are circular holes. The sprocket device of claim 23, wherein the long sides of each of the blocks are arranged along the direction of rotation of the sprocket. The sprocket device according to claim 11, wherein the second largest diameter sprocket to the second small diameter sprocket are slid through the two connecting members and the sprocket on both sides.