CN214295394U

CN214295394U - Rear hub structure for belt

Info

Publication number: CN214295394U
Application number: CN202120088341.4U
Authority: CN
Inventors: 陈柏诚
Original assignee: Chuancheng Technical Research Co ltd
Current assignee: Chuancheng Technical Research Co ltd; Drivetrain Tech Solution Inc
Priority date: 2021-01-13
Filing date: 2021-01-13
Publication date: 2021-09-28
Anticipated expiration: 2031-01-13

Abstract

A back hub structure for belt is used to combine a shaft tube and a mandrel, and comprises a body, an inner gear ring and a belt pulley. The axial inside of the body has an assembly space. The inner gear ring is combined in the assembling space of the body, an accommodating space is axially arranged on the inner gear ring, and an inner ratchet part is arranged on the inner wall surface of the accommodating space. The belt pulley is provided with a ratchet seat, the belt 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. Therefore, the belt pulley can directly transmit torque to the body, so that the hub has a uniform stress effect when rotating.

Description

Rear hub structure for belt

Technical Field

The utility model relates to a technical field of bicycle indicates a back flower-drum structure that belt was used especially.

Background

The hub for belt of bicycle includes one combination of one main body, one toothed ring, one tower base and one belt pulley. Wherein one end of the tower base is provided with a plurality of ratchet elements. The gear ring is arranged inside one end of the body. One end of the tower footing is mounted at one end of the body and the ratchet element engages the toothed ring. Thus, the ratchet element can be used to drive the combination of the gear ring and the body to rotate when the tower base rotates.

The traditional structure mode is that the tower foundation is connected with the concave-convex rib of the inner wall surface of the axial through hole of the belt pulley in an embedded mode through the concave-convex rib on the outer surface. Because the tower base is made of metal and the belt pulley is made of plastic, the hardness of the tower base and the belt pulley are different. During the period of transmitting the torque, the embedded position of the belt pulley and the tower footing is easy to be abraded due to different hardness of materials, so that the degree of engagement between the abraded belt pulley and the tower footing is reduced, the belt pulley is loosened relative to the tower footing, and further, the defects of unstable torque transmission, untimely torque transmission and uneven stress on the whole hub are caused in the process of transmitting the torque.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a back flower-drum structure that belt was used, it adopts a belt pulley configuration in the form of a body one end, makes the drive power that this belt pulley provided, directly transmits to this ratchet, and then drives this body and rotate, has more even atress effect when making this wheel hub rotate to and have the stability of preferred when rotating, borrow this shortcoming of solving traditional wheel hub whole atress inequality.

To achieve the above objects and advantages, the present invention provides a rear hub structure for a belt, which comprises a body, an inner ring gear, and a driving member. The axial inside of the body has an assembly space. The inner gear ring is combined in the assembling space of the body, an accommodating space is axially arranged on the inner gear ring, and an inner ratchet part is arranged on the inner wall surface of the accommodating space. The driving piece is provided with a belt pulley portion, a blocking wall portion, a pawl seat portion and a plurality of pawls, wherein the pawl seat portion is convexly formed on one side of the belt pulley portion, the blocking wall portion is located between the pawl seat portion and the belt pulley portion, each pawl is installed on the pawl seat portion, the combination of the pawl seat portion and each pawl is installed in the accommodating space, each pawl is meshed with the inner ratchet portion, and the belt pulley portion and the blocking wall portion are located outside one end of the body.

In an embodiment, the belt pulley further includes an axle tube, an axle, and a fixing member, wherein one end of the axle tube has an axle tube threaded portion, a surface of the axle has an axle tube threaded portion, the fixing member has a first threaded portion and a second threaded portion in an axial direction, an axial center of the pulley portion is a through channel, an inner wall surface of the through channel has a stop edge, the axle tube is combined with the axle, a combination of the axle tube and the axle is combined and passes through the body, the driving member is installed at one end of the body, the fixing member abuts against the stop edge of the pulley portion, the first threaded portion of the fixing member engages with the axle tube threaded portion of the axle tube, and the second threaded portion of the fixing member engages with the axle tube threaded portion of the axle tube.

In one embodiment, the belt pulley further comprises a stop element mounted on a side of the belt pulley portion opposite to the stop wall portion.

In an embodiment, the stopper assembly includes a stopper piece and a lock piece, one side of the pulley portion has a protruding thread section, an outer diameter of the thread section is smaller than an outer diameter of the pulley portion, the stopper piece has a through hole in an axial direction, a stopper edge is formed on an inner wall surface of the through hole, an axial center of the lock piece has a lock hole, an inner wall surface of the lock hole has a lock hole thread section, the thread section passes through the through hole of the stopper piece and the lock hole of the lock piece, the lock hole thread section of the lock piece is locked to the thread section, and the lock piece presses against the stopper edge of the stopper piece.

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

In an embodiment, the belt pulley further includes a replaceable belt pulley, the replaceable belt pulley has an engaging hole at an axial center thereof, the replaceable belt pulley has a replaceable belt pulley tooth portion at an outer circumferential portion thereof, the replaceable belt pulley is engaged with the belt pulley portion, and the stopping member is configured to abut against the belt pulley portion and the replaceable belt pulley.

In one embodiment, the outer peripheral surface of the pulley portion has a pulley tooth portion, the inner wall surface of the engaging hole of the replaceable pulley has an engaging tooth portion, the replaceable pulley is sleeved on the pulley portion, and the engaging tooth portion engages with the pulley tooth portion.

In the following, preferred embodiments are described in detail with reference to the drawings, and the structure and combination of the present invention will be described in detail.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description will be given below of the drawings required to be used in the description of the embodiments or the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 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 view of the present invention matching with a plurality of teeth belt pulleys.

Wherein, 10 the body; 12 an assembly space; 14 shaft tubes; 140 axle tube screw thread part; 16 a mandrel; 160 mandrel thread portion; 20 an inner toothed ring; 22 an accommodating space; 24 inner ratchet portion; 30 a driving member; 32 pulley portions; 320 through the channel; 321 a stop edge; 322 a first side; 324 a second side; 326 thread segments; 328 pulley teeth; 33 blocking the wall part; 34 a pawl seat; 36 pawls; 38 a stop assembly; a 40 blocking piece; 400 punching; 402 a flange; 42 locking plate; 420 a lock hole; 422 lock hole screw thread part 44; 46 a first threaded portion; 48 a second threaded portion; 50 a replaceable pulley; 52 engaging the aperture; 520 engage the belt teeth of the replaceable teeth 54.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1 and 2, a rear hub structure for a belt is disclosed, which includes a body 10, an inner ring 20, and a driving member 30. Wherein the body 10 is of a through construction and an assembly space 12 is formed axially inwardly of the body 10. The assembly space 12 is provided with a plurality of bearing members. An axle tube 14 is passed through each of the bearing members and is located in the assembly space 12. One end of the shaft tube 14 has a shaft tube threaded portion 140. further, the shaft tube threaded portion 140 is formed at an axial periphery of the shaft tube 14, and the shaft tube threaded portion 140 is adjacent to one end of the shaft tube 14. A spindle 16 passes through the axially inner portion of the shaft tube 14, and the axially outer surface of the spindle 16 has a spindle threaded portion 160.

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

The driving member 30 has a pulley portion 32, a blocking portion 33, a pawl receiving portion 34 and a plurality of pawls 36. The axial center of the pulley portion 32 is a through channel 320, and the inner wall surface of the through channel 320 has a stop edge 321. The pulley portion 32 has a first side 322 and a second side 324, and the first side 322 is opposite to the second side 324. The pawl seat 34 is formed on the first side 322 of the pulley portion 32, and further, the pawl seat 34 protrudes from the first side 322, and the pawl seat 34 is used for mounting each pawl 36. A raised threaded section 326 is formed on the second side 324 of the pulley portion 32, the threaded section 326 having an outer diameter less than an outer diameter of the pulley portion 32. The blocking wall portion 33 is formed at the axial outer 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.

The present embodiment further comprises a stopping element 38, wherein the stopping element 38 comprises a blocking plate 40 and a locking plate 42. The baffle 40 is generally ring-shaped, the baffle 40 has a through hole 400 in the axial direction, and a stop edge 402 is formed on the inner wall surface of the through hole 400. The locking plate 42 is generally annular, the axial center of the locking plate 42 has a locking hole 420, and a locking hole screw portion 422 is formed on the inner wall surface of the locking hole 420. Next, the outer diameter of the baffle 40 is larger than the outer diameter of the pulley portion 32.

The embodiment further includes a fixing member 44, and the fixing member 40 is substantially annular and has a penetrating structure. The fixing member 40 has a first threaded portion 46 and a second threaded portion 48 axially inward, and the first threaded portion 46 is adjacent to the second threaded portion 48.

The inner ring gear 20 is coupled to the body 10 and located in the assembly space 12. For example, the inner ring gear 20 may be coupled to the body 10 by a screw lock, a tight fit, a snap fit, or other equivalent positioning means. The driving member 30 is mounted on the body 10, the combination of the pawl seat 34 and each pawl 36 is inserted into and mounted in the receiving space 22 of the inner ring gear 20, and one end of each pawl 36 is engaged with the inner ratchet portion 24 of the inner ring gear 20. The pulley portion 32 and the blocking wall portion 33 are located outside one end of the body 10.

The stop assembly 38 is mounted on the pulley portion 32, and further, the blocking plate 40 is disposed against the second side surface 322 of the pulley portion 32, and the blocking plate 40 is opposite to the blocking wall portion 33. The locking tab 42 is mounted in the through hole 400 of the blocking plate 40, and the locking tab 42 is abutted against the blocking edge 402 of the blocking plate 40; the threaded section 326 of the pulley portion 32 passes through the through hole 400 of the stopper 40 and the locking hole 320 of the locking plate 42. The locking hole threaded portion 422 of the locking tab 42 engages the threaded portion 326 of the pulley portion 32. The fixing member 44 is installed in the through channel 320 of the pulley portion 32, and further, one end of the fixing member 44 abuts against the stop edge 321 of the through channel 320; the first threaded portion 46 of the fixing member 44 engages the shaft tube threaded portion 140 of the shaft tube 14, and the second threaded portion 48 of the fixing member 44 engages the shaft tube threaded portion 160 of the shaft tube, so that the driving member 30 is coupled to one end of the body 10. It should be noted that the stop wall portion 33 of the driving member 30 and the stop plate 40 of the stop component 38 can limit the belt at the pulley tooth portion 328 of the pulley portion 32, so that the belt is not easy to separate from the pulley portion 32.

Referring to fig. 3, the present embodiment further includes a replaceable pulley 50, the replaceable pulley 50 has a meshing hole 52 at an axial center thereof, and an inner wall surface of the meshing hole 52 has a meshing tooth portion 520. The replaceable pulley 50 has a replaceable pulley tooth 54 on an outer periphery thereof, the replaceable pulley 50 is sleeved on the pulley portion 32, and the pulley tooth 328 of the pulley portion 32 is engaged with the engaging tooth 520 of the replaceable pulley 50. The stopping component 38 is combined with the pulley portion 32, and the baffle 40 of the stopping component 38 abuts against the pulley portion 32 and the replaceable pulley 50, so as to stop the pulley portion 32 and the replaceable pulley 50.

According to the above, the utility model has the advantages of it is following:

1. the pawl seat 34 of the driving member 30 is formed on one side of the pulley portion 32 and is an integral structure made of the same material, and the combination of the pawl seat 34 and the pawls 36 is directly inserted into the body 10 to engage with the internal gear ring 20, so as to solve the disadvantage caused by the mutual engagement of the conventional belt pulley and tower footing via the concave-convex ribs, and therefore, the embodiment of the present invention has the advantages of timely torque transmission and stable torque transmission.

2. Since the stopping member 38 is a detachable member relative to the pulley portion 32, a user can select the replaceable pulley 50 with a suitable size to be mounted on the pulley portion 32, and then press and position the replaceable pulley 50 and the pulley portion 32 by means of the stopping member 38, so that the user can simply and rapidly change pulleys with different sizes to meet practical use requirements and high convenience.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. A rear hub structure for a belt, comprising:

a body having an assembly space axially inside;

the inner gear ring is combined in the assembling space of the body, an accommodating space is axially arranged on the inner gear ring, and an inner ratchet part is arranged on the inner wall surface of the accommodating space;

a driving piece, which has a pulley part, a blocking wall part, a pawl seat part and plural pawls, wherein the pawl seat part is convexly formed at one side of the pulley part, the blocking wall part is located between the pawl seat part and the pulley part, each pawl is installed at the pawl seat part, the combination of the pawl seat part and each pawl is installed in the accommodating space, each pawl is engaged with the inner ratchet part, and the pulley part and the blocking wall part are located outside one end of the body.

2. The rear hub structure for belt of claim 1, further comprising a shaft tube, a mandrel and a fixing member, wherein the shaft tube has a threaded portion at one end thereof, the mandrel has a threaded portion on the surface thereof, the fixing member has a first threaded portion and a second threaded portion axially therein, the pulley portion has a through passage at an axial center thereof, and a stop edge is provided on an inner wall surface of the through passage, the shaft tube is coupled to the mandrel, the shaft tube and the mandrel are coupled to and pass through the body, the driving member is mounted at one end of the body, the fixing member abuts against the stop edge of the pulley portion, the first threaded portion of the fixing member engages the threaded portion of the shaft tube, and the second threaded portion of the fixing member engages the threaded portion of the mandrel.

3. The rear hub structure as claimed in claim 1, further comprising a stopper member mounted on a side of the pulley portion opposite to the retaining wall.

4. The rear hub structure for a belt as claimed in claim 3, wherein the stopper member comprises a stopper piece and a lock piece, one side of the pulley portion has a protruded thread section, the outer diameter of the thread section is smaller than the outer diameter of the pulley portion, the stopper piece has a through hole in an axial direction, a stopper edge is formed on an inner wall surface of the through hole, the lock piece has a lock hole in an axial center thereof, an inner wall surface of the lock hole has a lock hole thread section, the thread section passes through the through hole of the stopper piece and the lock hole of the lock piece, and the lock hole thread section of the lock piece is locked to the thread section, and the lock piece is pressed against the stopper edge of the stopper piece.

5. The rear hub structure for a belt as claimed in claim 4, wherein the outer diameter of the baffle plate is larger than the outer diameter of the pulley portion.

6. The rear hub structure for a belt according to claim 3 or 4, further comprising a replaceable pulley having an engaging hole at an axial center thereof, a replaceable pulley tooth portion at an outer circumferential portion thereof, the replaceable pulley engaging with the pulley portion, and the stopper member abutting against the pulley portion and the replaceable pulley.

7. The rear hub structure for a belt according to claim 6, wherein the pulley portion has a pulley tooth portion on an outer peripheral surface thereof, and the inner wall surface of the engaging hole of the replaceable pulley has an engaging tooth portion, the replaceable pulley being fitted around the pulley portion, the engaging tooth portion engaging with the pulley tooth portion.