TWI760047B - Rear hub structure for the belt - Google Patents

Abstract

A rear hub structure for a belt is used to combine a combination of a shaft tube and a mandrel, which includes a body, an internal gear ring and a pulley. The main body has an assembly space inside the axial direction. The inner gear ring is combined with the assembly space of the body, the inner gear ring has an accommodating space in the axial direction, and the inner wall of the accommodating space has an inner ratchet part. The pulley has a ratchet seat, the pulley is combined with the body, and the ratchet seat extends into the accommodating space of the inner gear ring and corresponds to the inner ratchet part. Thereby, the pulley can directly transmit torque to the main body, so that the wheel hub has a more uniform force effect when rotating.

Description

Rear hub structure for belt

The invention relates to the technical field of a bicycle, in particular to a rear hub structure for a belt.

Generally, the hub system for the belt of the bicycle includes a body, a gear ring, a freewheel base and a combination of a pulley. One end of the tower base is provided with a plurality of ratchet elements. The gear ring is installed inside one end of the body. One end of the freewheel base is mounted on one end of the body and the ratchet element engages the toothed ring. In this way, the freewheel base rotates, and the ratchet element can be used to drive the combination of the toothed ring and the main body to rotate.

The traditional structural form is that the freewheel body is connected with each other by means of the concave-convex rib on the outer surface and the concave-convex rib on the axially perforated inner wall surface of the pulley. Since the freewheel is made of metal and the pulley is made of plastic, the hardness of each is different. During the torque transmission period, the fitting position of the pulley and the freewheel body is easily worn due to the different hardness of the material. As a result, the meshing degree of the worn pulley and the freewheel body is reduced, so that the pulley will be loose relative to the freewheel body. , and then in the process of torque transmission, it will cause the shortcomings of unstable torque transmission and untimely transmission, as well as the disadvantage of uneven stress on the wheel as a whole.

The purpose of the present invention is to provide a rear hub structure for a belt, which adopts the form that a pulley is arranged at one end of the main body, so that the driving force provided by the pulley is directly transmitted to the ratchet. The mechanism drives the body to rotate, so that the hub has a relatively uniform force effect when rotating, and has better stability when rotating, thereby solving the disadvantage of uneven overall force on the traditional wheel hub.

In order to achieve the above purpose and effect, the present invention provides a rear hub structure for a belt, which includes a main body, an inner gear ring, and a driving member. An assembly space is provided in the axial interior of the body. The inner toothed ring is combined with the assembly space of the main body, the inner toothed ring has an accommodating space in the axial direction, and the inner wall surface of the accommodating space has an inner ratchet portion. The driving member has a pulley portion, a blocking portion, a pawl seat portion and a plurality of pawls, wherein the pawl seat portion protrudes from one side of the pulley portion, and the blocking portion is located at the pawl seat portion and the pulley portion, each of the pawls is installed on the pawl seat portion, the combination of the pawl seat and each of the pawls is installed in the accommodating space, each of the pawls engages the inner ratchet portion, the pulley The part and the blocking part are outside one end of the body.

In one embodiment, it further includes a shaft tube, a mandrel and a fixing piece, one end of the shaft tube has a shaft tube threaded portion, the surface of the mandrel has a spindle threaded portion, and the interior of the fixing piece has a first threaded portion in the axial direction and a second threaded portion, the axial center of the pulley portion is a through channel, and the inner wall surface of the through channel has a stop edge, the shaft tube is combined with the mandrel, and the combination of the shaft tube and the mandrel is Combining with and passing through the main body, the driving part is installed at one end of the main body, the fixing part abuts against the stop edge of the pulley part, and the first threaded part of the fixing part engages the shaft pipe threaded part of the shaft pipe , the second threaded portion of the fixing piece engages the threaded portion of the spindle of the spindle.

In one embodiment, a stopper component is further included for being installed on one side of the pulley portion opposite to the blocking portion.

In one embodiment, the stopper component includes a blocking piece and a locking piece, one side of the pulley portion has a protruding thread segment, the outer diameter of the thread segment is smaller than the outer diameter of the pulley portion, the stopper There is a through hole in the axial direction of the plate, a baffle is formed on the inner wall surface of the through hole, and the axial center of the locking plate has a A lock hole, the inner wall of the lock hole has a lock hole threaded portion, the threaded segment passes through the through hole of the blocking piece and the lock hole of the lock piece, and the lock hole threaded portion of the lock piece is locked at the The threaded section, the locking piece is pressed against the baffle of the baffle.

In one embodiment, the outer diameter of the blocking piece is larger than the outer diameter of the pulley portion.

In one embodiment, a replaceable pulley is further included, the axial center of the replaceable pulley has a meshing hole, the outer peripheral portion of the replaceable pulley has a replaceable pulley tooth portion, the replaceable pulley sleeve In conjunction with the pulley portion, the stopper assembly is used for abutting against the pulley portion and the replaceable pulley.

In one embodiment, the outer peripheral surface of the pulley portion has a pulley tooth portion, the inner wall surface of the meshing hole of the replaceable pulley has a meshing tooth portion, the replaceable pulley is sleeved on the pulley portion, the meshing The teeth engage the pulley teeth.

Hereinafter, according to the purpose and effect of the present invention, preferred embodiments are given and described in detail with the accompanying drawings.

10: Ontology

12: Assembly space

14: Axle tube

140: Threaded part of shaft pipe

16: Mandrel

160: Mandrel thread

20: Internal gear ring

22: Accommodating space

24: Internal ratchet

30: Drivers

32: Pulley part

320: Through the channel

321: Stop edge

322: First side

324: Second side

326: Threaded segment

328: pulley teeth

33: Block wall

34: Pawl seat

36: Pawl

38: Stopper assembly

40: Baffle

400: perforated

402: Fence

42: cleat

420: keyhole

422: Keyhole threaded part

44: Fixtures

46: The first thread part

48: Second thread part

50: Interchangeable pulley

52: Engagement hole

520: Meshing teeth

54: Replaceable belt teeth

Figure 1 is an exploded view of the present invention.

Fig. 2 is a cross-sectional view of the present invention.

FIG. 3 is a schematic diagram of the present invention with a multi-tooth pulley.

Please refer to Figures 1 and 2, which show a rear hub structure for a belt, which includes a main body 10 , an inner gear ring 20 and a driving member 30 . The main body 10 is a through structure, and an assembly space 12 is formed in the axial interior of the main body 10 . A plurality of bearing members are installed in the assembly space 12 . One-axis tube 14 tie-through Pass each of the bearing parts and are located in the assembly space 12 . One end of the shaft tube 14 has a shaft tube thread portion 140 , further, the shaft tube thread portion 140 is formed on the axial periphery of the shaft tube 14 , and the shaft tube thread portion 140 is adjacent to one end of the shaft tube 14 . Passing through the axial interior of the shaft tube 14 is a mandrel 16 having a mandrel thread 160 on the axially outer surface of the mandrel 16 .

The inner toothed ring 20 is an annular member, and the inner toothed ring 20 has an accommodating space 22 in the axial direction. An inner ratchet portion 24 is formed on the inner wall surface of the accommodating space 22 .

The driving member 30 has a pulley portion 32 , a blocking portion 33 , a pawl seat portion 34 and a plurality of pawls 36 . The axial center of the pulley portion 32 is a through channel 320 , and an inner wall surface of the through channel 320 has a stop edge 321 . The pulley portion 32 has a first side surface 322 and a second side surface 324 , and the first side surface 322 is opposite to the second side surface 324 . The pawl seat portion 34 is formed on the first side surface 322 of the pulley portion 32 . Further, the pawl seat portion 34 protrudes from the first side surface 322 , and the pawl seat portion 34 is used for each of the ratchets. Claw 36 is installed. A protruding thread segment 326 is formed on the second side surface 324 of the pulley portion 32 , and the outer diameter of the thread segment 326 is smaller than the outer diameter of the pulley portion 32 . The blocking portion 33 is formed on the axial periphery of the driving member 30 and is located between the pawl seat portion 34 and the pulley portion 32 . Next, the outer peripheral surface of the pulley portion 32 has a pulley tooth portion 328 .

This embodiment further includes a blocking member 38 , and the blocking member 38 includes a blocking piece 40 and a locking piece 42 . The blocking piece 40 is generally annular, and has a through hole 400 in the axial direction of the blocking piece 40 , and a blocking edge 402 is formed on the inner wall surface of the through hole 400 . The locking piece 42 is generally annular, and has a locking hole 420 in the axial center of the locking piece 42 , and a locking hole threaded portion 422 is formed on the inner wall of the locking hole 420 . Secondly, the outer diameter of the blocking piece 40 is larger than the outer diameter of the pulley portion 32 .

The present embodiment further includes a fixing member 44, and the fixing member 44 is generally annular and has a through structure. The fixing member 44 has a first threaded portion 46 and a second threaded portion 48 in the axial interior thereof, and the first threaded portion 46 is adjacent to the second threaded portion 48 .

The inner gear ring 20 is combined with the main body 10 and located in the assembly space 12 . For example, the inner gear ring 20 can be combined with the body 10 by screw locking, tight fitting, concave-convex snap fitting, or other equivalent positioning methods. The driving member 30 is installed on the main body 10 , the combination of the pawl seat 34 and each of the pawls 36 extends into and is installed in the accommodating space 22 of the inner toothed ring 20 , one end of each of the pawls 36 is The system engages the inner ratchet portion 24 of the inner gear ring 20 . The pulley portion 32 and the blocking portion 33 are located outside one end of the main body 10 .

The stopper assembly 38 is installed on the pulley portion 32 . Further, the blocking piece 40 is resting on the second side surface 322 of the pulley portion 32 , and the blocking piece 40 is opposite to the blocking portion 33 . The locking piece 42 is installed in the through hole 400 of the blocking piece 40 , and the locking piece 42 rests on the blocking edge 402 of the blocking piece 40 ; the threaded section 326 of the pulley portion 32 passes through the blocking piece 40 The through hole 400 and the locking hole 320 of the locking piece 42 . The locking hole threaded portion 422 of the locking piece 42 engages the threaded section 326 of the pulley portion 32 . The fixing member 44 is installed on the through channel 320 of the pulley portion 32 , further, one end of the fixing member 44 is abutted against the stop edge 321 of the through channel 320 ; the first threaded portion 46 of the fixing member 44 The shaft tube threaded portion 140 of the shaft tube 14 is engaged, and the second threaded portion 48 of the fixing member 44 is engaged with the mandrel threaded portion 160 of the mandrel, so that the driving member 30 is combined with one end of the body 10 . It is worth noting that, by the blocking portion 33 of the driving member 30 and the blocking piece 40 of the blocking component 38, the belt can be limited to the pulley tooth portion 328 of the pulley portion 32, so that the belt is not easily separated from the pulley portion 328. Pulley portion 32 .

Please refer to FIG. 3 , this embodiment further includes a replaceable pulley 50 , the axial center of the replaceable pulley 50 has a meshing hole 52 , and the inner wall of the meshing hole 52 has a meshing tooth 520 . The outer circumference of the replaceable pulley 50 has a replaceable pulley tooth 54, and the replaceable pulley 50 is sleeved on the The pulley portion 32 and the pulley tooth portion 328 of the pulley portion 32 are engaged with the meshing tooth portion 520 of the replaceable pulley 50 . The stopper assembly 38 is combined with the pulley portion 32 , and the blocking piece 40 of the stopper assembly 38 abuts against the pulley portion 32 and the replaceable pulley 50 , and then stops the pulley portion 32 and the replaceable pulley 50 .

According to the above, the present invention has the following advantages:

1. The pawl seat portion 34 of the driving member 30 is formed on one side of the pulley portion 32 and is an integral structure of the same material, and the combination of the pawl seat portion 34 and each of the pawls 36 is directly inserted into the body 10 meshes with the inner gear ring 20, which can solve the disadvantage of the conventional pulley and the freewheel base by the concave-convex rib fitting each other. Therefore, the embodiment of the present invention has the advantages of timely torque transmission and stable torque transmission.

2. Since the stopper assembly 38 is a detachable part relative to the pulley part 32 , the user can choose an appropriate size of the replaceable pulley 50 to install on the pulley part 32 , and then use the stopper assembly 38 to press against the pulley part 32 . And positioning the replaceable pulley 50 and the pulley part 32, so that the user can easily and quickly change the pulleys of different sizes to meet the actual use requirements and high convenience.

The above-mentioned embodiments are only used to illustrate the technology of the present invention and its effects, but are not intended to limit the present invention. Anyone skilled in the art can modify and change the above embodiments without violating the technical principle and spirit of the present invention. Therefore, the scope of protection of the present invention should be listed in the scope of the patent application described later. .

10: Ontology

12: Assembly space

14: Axle tube

140: Threaded part of shaft pipe

16: Mandrel

160: Mandrel thread

20: Internal gear ring

22: Accommodating space

24: Internal ratchet

30: Drivers

32: Pulley part

320: Through the channel

321: Stop edge

322: First side

324: Second side

326: Threaded segment

328: pulley teeth

33: Block wall

34: Pawl seat

36: Pawl

38: Stopper assembly

40: Baffle

400: perforated

402: Fence

42: cleat

420: keyhole

422: Keyhole threaded part

44: Fixtures

Claims (5)

A rear hub structure for a belt, comprising: a main body with an assembly space in the axial direction; an inner gear ring, which is combined with the assembly space of the main body, the inner gear ring has an accommodating space in the axial direction, the inner gear ring has an accommodating space in the axial direction, the The inner wall surface of the accommodating space has an inner ratchet portion; a driving member has a pulley portion, a blocking portion, a pawl seat portion and a plurality of pawls, wherein the pawl seat portion protrudes and forms on the pulley On one side of the pawl, the blocking portion is located between the pawl seat and the pulley, each pawl is installed on the pawl seat, and the combination of the pawl seat and each pawl is installed in the accommodating space , each of the pawls engages the inner ratchet portion, the pulley portion and the blocking portion are outside one end of the body; a shaft tube, one end has a shaft tube thread portion; a mandrel, the surface has a mandrel thread portion; and a fixed The inner part has a first threaded part and a second threaded part in the axial direction, the axial center of the pulley part is a through channel, and the inner wall surface of the through channel has a stop edge, the shaft tube is combined with the mandrel , the combination of the shaft tube and the mandrel is combined and passed through the main body, the driving part is installed at one end of the main body, the fixed part abuts against the stop edge of the pulley part, the first thread of the fixed part The second thread portion of the fixing member engages the mandrel thread portion of the mandrel. A rear hub structure for a belt comprises: a main body with an assembling space in the axial direction; an inner gear ring, which is combined with the assembling space of the main body, the inner gear ring has an accommodating space in the axial direction, the The inner wall surface of the accommodating space has an inner ratchet portion; A driving member has a pulley part, a blocking part, a pawl seat part and a plurality of pawls, wherein the pawl seat part is formed protruding on one side of the pulley part, and the blocking part is located on the pawl seat Between the pulley portion and the pulley portion, each of the pawls is installed on the pawl seat portion, the combination of the pawl seat and each of the pawls is installed in the accommodating space, each of the pawls engages the inner ratchet portion, the The pulley part and the blocking part are outside one end of the main body; and a stopper assembly is installed on one side of the pulley part opposite to the blocking part; the stopper element comprises a blocking piece and a locking piece, the pulley There is a protruding threaded section on one side of the threaded section, and the outer diameter of the threaded section is smaller than the outer diameter of the pulley section. There is a lock hole in the axial center of the lock hole, and the inner wall of the lock hole has a lock hole threaded portion, and the threaded section passes through the through hole of the blocking piece and the lock hole of the lock piece, and the lock hole of the lock piece The threaded portion is locked on the threaded section, and the locking piece is pressed against the blocking edge of the blocking piece. The rear hub structure for belt use as claimed in claim 2, wherein the outer diameter of the blocking piece is larger than the outer diameter of the pulley portion. The rear hub structure for a belt according to claim 2, further comprising a replaceable pulley, the axial center of the replaceable pulley has a meshing hole, and the outer peripheral portion of the replaceable pulley has a replaceable pulley tooth portion , the replaceable pulley is sleeved and combined with the pulley portion, and the stop component is used for abutting against the pulley portion and the replaceable pulley. The rear hub structure for a belt according to claim 4, wherein the outer peripheral surface of the pulley portion has a pulley tooth portion, the inner wall surface of the meshing hole of the replaceable pulley has a meshing tooth portion, and the replaceable pulley sleeve Connected to the pulley portion, the meshing tooth portion engages the pulley tooth portion.

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