TWM520051U - Bicycle rear derailleur having function of stabilizing chain - Google Patents

Description

Bicycle rear derailleur with stable chain function

This creation relates to the derailleur in the bicycle shifting system, and more particularly to the rear derailleur.

Bicycle transmissions typically include a shift lever or shifting grip mounted on the handlebar, a front derailleur mounted adjacent the center axle of the bicycle, and a rear derailleur mounted adjacent the rear axle of the bicycle. For the rear derailleur, it generally includes: a base member, a movable member, a chain guide, etc., the movable member is movably coupled to the base member by a link mechanism, and the function of the control cable on the shift lever Underneath, the chain guide is moved laterally relative to the base member for the purpose of shifting shifting. The chain guide of the rear derailleur is typically rotatably mounted on the movable member and is resiliently biased in a clockwise direction to allow the chain guide to be adjusted from a larger diameter sprocket to a smaller diameter in the chain The sprocket can adjust the slack of the chain.

However, with the further development of bicycle sports, especially the use of mountain bicycles, the typical rear derailleur has some shortcomings. During cycling in rugged terrain, bumps and vibrations can cause the chain guide to rotate counterclockwise, causing undesired slack in the chain, which can cause the chain to detach from the sprocket, posing an unpredictable risk to the rider. Therefore, there is room for further improvement in a typical rear derailleur.

In view of the above situation, the creator devoted a lot of time to research related knowledge. Knowledge, and compare the advantages and disadvantages, carry out research and development of related products, and after many experiments and tests, and finally launched a "sports rear derailleur with stable chain function" to improve the above-mentioned lack, in line with the public Need to use.

The main purpose of this creation is to provide a bicycle rear derailleur with a stable chain function that can improve the safety of bicycle riding without affecting the shifting function of the rear derailleur.

In order to achieve the above objects and effects, the present invention provides a bicycle rear derailleur having a stable chain function, comprising a base member, a movable member, a rotating shaft assembly, a chain guide and a resistance applying assembly. Wherein: the base member is mounted to the bicycle frame; the movable member is coupled to the base member; the chain guide is coupled to the movable member by the rotating shaft assembly and rotates relative to the movable member about an axis of the rotating shaft assembly The resistance applying assembly includes a friction applying member and a clutch assembly, and the clutch assembly operates to cause the friction applying member to generate frictional resistance to the chain guide, and the clutch assembly includes a first clutch ring and a second clutch ring; Wherein the first clutch ring is coupled to the rotating shaft assembly in a torque transmitting manner, and the friction applying member is mounted on the second clutch ring and applies a frictional force to the rotational motion of the second clutch ring, and the first clutch At least one of the ring and the second clutch ring can be along the axis of the rotating shaft assembly relative to the movable member The direction of axial movement.

A further technical feature of the present invention is that the first clutch ring and the second clutch ring each have a first tooth portion and a second tooth portion that are correspondingly engaged and disengaged.

A further technical feature of the present invention is that an elastic member is disposed between the first clutch ring and the rotating shaft assembly.

According to a further technical feature of the present invention, the rotating shaft assembly includes a rotating shaft and a bolt, and the rotating shaft is coupled to the chain guide, and the bolt passes through the first clutch ring and the elastic member and is assembled on the rotating shaft.

A further technical feature of the present invention, wherein the elastic member is a wave spring.

According to a further technical feature of the present invention, the second clutch ring has a convex portion, and the friction applying member has an opening portion and an annular portion, and the annular portion is sleeved on the convex portion and closely fits.

A further technical feature of the present invention, wherein the movable member comprises an upper half and a lower half, the convex portion of the second clutch ring and the friction applying member are assembled in the upper half, and the upper half has a narrow groove And a groove having an opening size smaller than an opening size of the opening of the friction applying member.

Compared with the prior art, the present invention has the beneficial effect that since the resistance applying assembly includes a friction applying member and a clutch member, the clutch member further includes a first clutch ring and a second clutch ring, wherein the first clutch ring is torqued The manner of transmission is combined with the rotating shaft assembly that is mounted to the second clutch ring, applies friction to the rotational movement of the second clutch ring, and at least one of the first clutch ring and the second clutch ring One can move axially along the axial direction of the rotating shaft assembly relative to the movable member such that when the first clutch ring rotates counterclockwise by the chain guide, the second clutch ring follows the first The rotation of the clutch ring is rotated, and at this time, the frictional resistance of the second clutch ring is applied by the friction applying member to restrict the free rotation of the second clutch ring, thereby applying frictional resistance to the rotation of the first clutch ring engaged therewith. And because the first clutch ring is non-rotatably mounted with the rotating shaft assembly, the rotating shaft member is not Pivotally connected to chain guide On the member, therefore, the frictional resistance is applied to the rotation of the chain guide to prevent the chain guide from undesired slack when riding in a rugged terrain, thereby achieving the effect of improving the safety of bicycle riding.

Therefore, this creation can be said to be a kind of practical and progressive creation, which is worthy of promotion by the industry and publicized to the public.

S‧‧‧Multi-speed variable speed flywheel

S1~S10‧‧‧Sprocket

100‧‧‧ Rear frame mounting section

200‧‧‧ rear derailleur

10‧‧‧ Spindle

20‧‧‧Installation shaft

30‧‧‧ Spring

40‧‧‧ screws

50‧‧‧shims

1‧‧‧Base member

2‧‧‧Removable components

21‧‧‧ upper half

211‧‧‧Narrow slot

212‧‧‧ Groove

22‧‧‧ Lower half

221‧‧‧ pin hole

222‧‧‧ round hole

223‧‧‧Depression

3‧‧‧Rotary shaft assembly

31‧‧‧ shaft

32‧‧‧Bolts

321‧‧‧ cylindrical surface

322‧‧‧ plane

4‧‧‧Chain guides

41‧‧‧First board parts

42‧‧‧Second board parts

43‧‧‧ tensioner

5‧‧‧ Resistance application component

51‧‧‧ friction applying member

511‧‧‧ openings

512‧‧‧Round Department

52‧‧‧Clutch components

53‧‧‧First clutch ring

531‧‧‧First tooth

532‧‧‧Meshing teeth

533‧‧‧Interface

534‧‧‧ buffer surface

535‧‧‧Installation holes

54‧‧‧Second clutch ring

541‧‧‧ convex

542‧‧‧Second tooth

543‧‧‧Meshing teeth

544‧‧‧Interface

545‧‧‧ buffer surface

6‧‧‧First link member

7‧‧‧Second link member

8‧‧‧Flexible parts

81‧‧‧ Wave spring

The first picture is a front external view of the creation of the bicycle on the bicycle.

The second picture is a schematic external view of the side of the creation.

The third figure is an external schematic diagram of the present invention after removing the upper portion of the movable member.

The fourth figure is a schematic diagram of the clutch assembly of the present invention.

The fifth figure is a schematic diagram of the parts of the second clutch ring of the present invention.

The sixth figure is a schematic diagram of the parts of the first clutch ring of the present creation.

The seventh figure is a schematic diagram of the components of the rotating shaft of the present creation.

The eighth figure is a schematic view of the parts of the friction applying member.

The ninth figure is a schematic view of the bottom of the upper half of the movable member.

The tenth figure is a top view of the lower half of the movable member of the present invention.

In order to clarify the purpose and effect of the above-mentioned creations, the features and effects of the present invention will be described in detail with reference to the drawings. Referring to the first to tenth drawings, there is shown a bicycle rear derailleur having a stable chain function, comprising a base member 1, a movable member 2, a rotating shaft assembly 3, and a a chain guide 4 and a resistance applying assembly 5, wherein: the base member 1 is mounted to the bicycle frame; the movable member 2 is coupled to the base member 1; the chain guide 4 passes through the rotating shaft set The member 3 is coupled to the movable member 2 and rotatable relative to the movable member 2 about the axis of the rotary shaft assembly 3; the resistance applying assembly 5 includes a friction applying member 51 and a clutch assembly 52, and the clutch assembly 52 operates The friction applying member 51 is caused to generate frictional resistance to the chain guide 4, and the clutch assembly 52 includes a first clutch ring 53 and a second clutch ring 54; wherein the first clutch ring 53 is torque-transmitted and rotated The shaft assembly 3 is coupled together, and the friction applying member 51 is mounted to the second clutch ring 54 and applies a frictional force to the rotational movement of the second clutch ring 54, and at least one of the first clutch ring 53 and the second clutch ring 54 One can move axially along the axial direction of the rotating shaft assembly 3 with respect to the movable member 2.

Please refer to the first figure, wherein S1~S10 are each of the multi-speed flywheel sets S, the rear mounting part 100 of the frame, and all the sprockets S1~S10 of the multi-speed variable speed flywheel set S are transmitted through the main shaft 10 Mounted on the rear mounting portion 100 of the frame. The rear derailleur 200 of the present invention is fixed to the rear tail hook of the rear mounting portion 100 of the frame through the mounting shaft 20. The rear derailleur 200 of the present invention includes a base member 1, a first link member 6, a second link member 7, a movable member 2, and a chain guide 4 pivotally coupled to the movable member 2, see The second figure is shown and assisted by the first figure. The general structure of the rear derailleur 200 is to move the base member 1, the first link member 6, the second link member 7 and the movable body through four pins. The members 2 are joined together to form a parallelogram structure, and the parallelogram structure always has a tendency to be in a minimum contracted position by the action of the spring 30. The chain guide 4 includes a second plate member 42 spaced apart from the first plate member 41 by the first plate member 41, a tension pulley 43 and a guide wheel (not shown). Meanwhile, it can also be seen in the second to fourth figures that the movable member 2 of the rear derailleur 200 includes an upper half 21 and a lower half 22, and is composed of an upper half 21 and a lower half 22 The two parts are composed and assembled by a plurality of screws 40, and the resistance applying assembly 5 is mounted in the movable member 2. again Referring to the third to fifth figures, it is clear from the drawing that the resistance applying assembly 5 is composed of two parts, one of which is composed of a friction applying member 51 and another partial clutch assembly 52. The clutch assembly 52 is composed of a first clutch ring 53 and a second clutch ring 54, wherein the friction applying member 51 is sleeved on the outer circumference of the convex portion 541 of the second clutch ring 54 of the clutch assembly 52 and is coupled to the second clutch The outer circumference of the convex portion 541 of the ring 54 closely fits. Referring to the seventh figure, it can be seen from the figure that the rotating shaft assembly 3 is composed of two parts, a rotating shaft 31 non-rotatably coupled with the chain guiding member 4, and two bolts 32 connected thereto by threads. And between the first clutch ring 53 and the rotating shaft assembly 3, there is an elastic member 8 that enables the first clutch ring 53 to always be in the meshing position with the second clutch ring 54 in the order of first clutch The ring 53 is mounted on the bolt 32, and the elastic member 8 is mounted on the bolt 32, and further mounted on the bolt 32 through a spacer 50, and finally the shaft 31 and the bolt 32 are assembled. The bolt 32 is provided on its cylindrical surface 321 with two planes 322 that cooperate with the central hole of the first clutch ring 53, thus ensuring that the first clutch ring 53 cannot rotate around the bolt 32, and also cannot rotate around the rotating shaft 31. . Of course, the socket structure in which the first clutch ring 53 cannot rotate about the rotating shaft assembly 3 can also adopt other structures, such as a square or elliptical socket. Referring to the fifth and eighth figures, it can be seen that the friction applying member 51 has a circular elastic member having an opening portion 511 and a circular portion 512, and the annular portion 512 is mounted at the second portion. The outer circumference of the convex portion 541 of the clutch ring 54 (as shown in the fourth figure). Referring to the ninth diagram and assisted by the second diagram and the third diagram, it can be seen that the convex portion 541 of the second clutch ring 54 and the friction applying member 51 are mounted on the upper half of the movable member 2. In the portion 21, the upper half 21 of the movable member has a narrow groove 211 and a groove 212, and the opening size of the narrow groove 211 is smaller than the opening size of the opening portion 511 of the friction applying member 51, so that when the friction applying member is to be used 51 and the second clutch ring 54 are mounted on the movable member 2 In the upper half 21, since the size of the narrow groove 211 is smaller than the opening size of the opening portion 511 of the friction applying member 51, the sleeve 512 on the friction applying member 51 is forced to fit tightly in the second package. The clutch ring 54 has an outer circumference on the convex portion 541, thereby applying frictional resistance to the free rotation of the second clutch ring 54. The function of the recess 212 is to ensure that the second clutch ring 54 is centered and does not deflect when mounted in the upper half 21 of the movable member 2, at which time the outer peripheral side of the second clutch ring 54 is just right. It falls into the groove 212 of the upper half 21 of the movable member 2.

Referring to the fourth to sixth figures, it can be seen that the first clutch ring 53 and the second clutch ring 54 each have a first tooth portion 531 and a second tooth portion 542 that are correspondingly engaged and disengaged from each other. And the first tooth portion 531 and the second tooth portion 542 each have a plurality of meshing teeth 532, 543, and as can be seen from the fifth and sixth figures, the first clutch ring 53 and the second clutch ring 54 Each of the meshing teeth 532, 543 is comprised of an upright engagement surface 533, 544 and a sloped cushioning surface 534, 545. The first clutch ring 53 is further provided with a mounting hole 535, and the first clutch ring 53 is mounted on the bolt 32 of the rotating shaft assembly 3 through the mounting hole 535, so that the rotating shaft assembly 3 is non-rotatably coupled with the chain guide 4. Together, it can rotate as the chain guide 4 rotates. As can be seen from the sixth figure, the mounting hole 535 in the middle of the first clutch ring 53 is not a circular hole but a hole having rotation prevention. The bolt 32 of the rotating shaft assembly 3 also has two planes 322 matched thereto at corresponding positions, so that when the first clutch ring 53 is mounted on the rotating shaft assembly 3, the first clutch ring 53 cannot be opposite to the rotating shaft assembly. 3 rotation can only be rotated as the rotary shaft assembly 3 rotates. At the same time, it can also be seen in the fourth figure that the elastic member 8 is arranged on one side of the first clutch ring 53, as shown in the tenth figure and assisted by the second to sixth figures, which can be seen from the figure. The lower half 22 of the movable member 2 is provided with a pin hole 221 connected to the first link member 6 and the second link member 7, and also for the rotating shaft group A circular hole 222 and a recess 223 pass through the piece 3. The plane of the recessed portion 223 is for supporting the elastic member 8, so that the elastic member 8 can obtain a sufficient supporting surface. Under the elastic force of the elastic member 8, the first clutch ring 53 always maintains a tendency to approach and engage the second clutch ring 54. When the first clutch ring 53 is rotated clockwise by the chain guide 4, since the buffer surface 534 of the first clutch ring 53 meshing tooth 532 is in contact with the buffer surface 545 of the second clutch ring 54 meshing tooth 543, The meshing teeth 532, 543 of the first and second clutch rings 53, 54 cannot be engaged, so the second clutch ring 54 does not rotate with the rotation of the first clutch ring 53, while the first clutch ring 53 is in the second clutch The pressing of the ring 54 overcomes the elastic force of the elastic member 8 and moves away from the meshing direction; when the first clutch ring 53 is rotated counterclockwise by the chain guide 4, the first clutch ring is acted upon by the elastic member 8. The engaging surface 533 of the engaging teeth 532 is in contact with the engaging surface 544 of the engaging teeth 543 of the second clutch ring 54, so that the engaging teeth 532, 543 of the first and second clutch rings 53, 54 are meshed with each other, and thus meshed. The second clutch ring 54 is also rotated by the rotation of the first clutch ring 53 by the teeth 532, 543, at which time the friction applying member 51 is tightly mounted on the outer circumference of the convex portion 541 of the second clutch ring 54. And the second clutch The rotation of the ring 54 applies frictional resistance to limit the free rotation of the second clutch ring 54, thereby applying frictional resistance to the rotation of the first clutch ring 53 that is engaged therewith. Further, since the first clutch ring 53 is non-rotatably mounted with the rotating shaft assembly 3, and the rotating shaft assembly 3 is non-rotatably coupled to the chain guide 4, frictional resistance is applied to the rotation of the chain guide 4, Thereby, it is possible to prevent the chain guide 4 from undesirably slacking when riding on a rough terrain.

In addition, the elastic member 8 may be a compression spring, an elastic rubber or the like in addition to the wave spring 81; and the elastic member 8 can make the first tooth portion 531 and the second tooth of the first and second clutch rings 53, 54 The portion 542 is more stable when engaged and disengaged.

While various embodiments of the present invention have been described in detail above, other variations may be employed without departing from the spirit and scope of the invention. For example, the first clutch ring 53 or the second clutch ring 54 can be changed to a ring having a plurality of square holes, and the interval between each square hole is set to the engagement faces 533, 544 with the upright sides and The buffered faces 534, 545 of the slanted sides can also achieve the same purpose; or by changing the size, shape or position of the various components, the function of one part can be achieved by two, and vice versa. It will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made to the present invention without departing from the spirit and scope of the invention. Therefore, the detailed description of the embodiments of the present disclosure is only intended to be construed as a limitation of the invention, and is intended to be limited to the scope of the present invention.

In summary, the creation of the bicycle rear derailleur with stable chain function is indeed in line with the development of the industry in terms of practicality and cost-effectiveness, and the disclosed structural creation is also unprecedented in innovation. Structure, so its "novelty" should be undoubtedly considered, and this creation can be more effective than the conventional structure, so it is also "progressive", which fully complies with the requirements of the application requirements for new patents in the Chinese Patent Law. It is a patent application filed in accordance with the law, and I would like to ask the bureau to review it as soon as possible and give it affirmation.

S‧‧‧Multi-speed variable speed flywheel

S1~S10‧‧‧Sprocket

100‧‧‧ Rear frame mounting section

200‧‧‧ rear derailleur

10‧‧‧ Spindle

20‧‧‧Installation shaft

1‧‧‧Base member

2‧‧‧Removable components

4‧‧‧Chain guides

6‧‧‧First link member

7‧‧‧Second link member

Claims (7)

A bicycle rear derailleur having a stable chain function, comprising a base member, a movable member, a rotating shaft assembly, a chain guide and a resistance applying assembly, wherein the base member is mounted on the bicycle frame The movable member is coupled to the base member; the chain guide is coupled to the movable member by the rotating shaft assembly and rotatable relative to the movable member about an axis of the rotating shaft assembly; the resistance applying assembly includes a friction applying member and a clutch assembly, the clutch assembly operating such that the friction applying member generates frictional resistance to the chain guide, and the clutch assembly includes a first clutch ring and a second clutch ring; wherein the first clutch ring transmits torque And the rotating shaft assembly is mounted, and the friction applying member is mounted on the second clutch ring and applies a frictional force to the rotational movement of the second clutch ring, and at least one of the first clutch ring and the second clutch ring can It is axially movable along the axial direction of the rotating shaft assembly with respect to the movable member. A bicycle rear derailleur having a stable chain function according to claim 1, wherein the first clutch ring and the second clutch ring each have a first tooth portion and a second tooth that are correspondingly engaged and disengaged from each other. unit. A bicycle rear derailleur having a stable chain function according to claim 1 or 2, wherein an elastic member is disposed between the first clutch ring and the rotating shaft assembly. A bicycle rear derailleur having a stable chain function according to claim 3, wherein the rotating shaft assembly includes a rotating shaft and a bolt, the rotating shaft is coupled to the chain guide, and the bolt passes through the first clutch The ring and the elastic member are assembled on the rotating shaft. A bicycle rear derailleur having a stable chain function according to claim 4, wherein the elastic member is a wave spring. A bicycle rear derailleur having a stable chain function according to claim 5, wherein the second clutch ring has a convex portion, and the friction applying member has an opening portion and a circular portion, and the circle The ring portion is sleeved on the convex portion and closely fits. A bicycle rear derailleur having a stable chain function according to claim 6, wherein the movable member includes an upper half and a lower half, and the convex portion of the second clutch ring is assembled with the friction applying member. In the upper half, the upper half has a narrow groove and a groove, and the opening size of the narrow groove is smaller than the opening size of the opening of the friction applying member.