DE202011108822U1 - A hub construction with a ratchet mechanism that can be moved in both directions - Google Patents

Abstract

A hub assembly composed of: a hub (10) having a first hole (11) in one end and having a groove (12) in an inner periphery of this first hole (11), the first groove (12) being parallel to an axis of the Hub (10) extends and a hub axle (13) is formed in the first hole (11); a tubular shaft (20) with a second hole (21) in one end and with a groove (22) in an inner periphery of this second hole (21), this second groove (22) running parallel to an axis of this tubular shaft (20); a drive component (30), which is designed as an annular component and is provided on an outer periphery with a plurality of first teeth (31) at a location which corresponds to that of the second groove (22), said drive component (30) having a conical first Ratchet (32) is formed, which is formed axially on the former and is provided with two triangular contact surfaces (34) which have a conical surface in radial ...

Description

BACKGROUND OF THE INVENTION

(1) FIELD OF THE INVENTION

The present invention relates to a hub assembly, in particular a hub assembly with a bi-directional ratchet mechanism, wherein the engagement and disengagement between the ratchet mechanisms are made more smoothly and efficiently.

(2) DESCRIPTION OF THE PREFERRED EMBODIMENT

A prior art hub assembly for bicycles is generally constructed of a hub, axle, rotatable component, and gear wheel to position the axle and rotate the wheel. Depending on the practical requirements, a tubular shaft and a derailleur are provided. The hub assembly is capable of transmitting torque in one direction or in both directions. The transmission in one direction means that the hub is rotated in a forward direction to move the bicycle forward, whereby the bicycle can not be driven in the reverse direction. With transmission in both directions, the hub can transmit torque in both directions.

The ratchet mechanism for the hub for transmitting in one direction may be engaged in a radial or axial direction. The radial engagement means that the hub is provided with the teeth in the radial direction, with the teeth being engaged in the radial ratchet blocks. This axial engagement means that the hub is provided with the teeth in the axial direction, with the teeth being engaged in the axial ratchet blocks.

Upon actuation, transmission in one direction creates a linear displacement between the ratchet and the hub to form a gap to disengage the ratchet and hub. Therefore, the hub can not transmit torque. The linear displacement between the ratchet and the hub may be a two-sided linear displacement and a one-sided linear displacement.

The Taiwan Patent no. 088117780 describes an axle, a hub coaxially connected to this axle, at least one bearing constructed from two bearings between the hub and the axle to rotate the hub relative to the axle. A rotor can be rotated about the axis and is connected via at least one gear to the rotor. A free wheel is disposed between the rotor and the hub and provided with two discs, which discs have a toothed surface. These two toothed surfaces are moved towards each other with a voltage regulator. The two discs are coaxial with the axle and are located on a surface that is perpendicular to the axis of the hub axle when the wheel is stopped. The discs are held in an inclined position relative to the surface mounted perpendicular to the axis of the hub axle. The two discs are installed successively while these two discs are shifted towards each other with a spring.

The Taiwan Utility Model no. 096219278 describes a collar which is made of metal, wherein a plurality of teeth are formed in an inner periphery of this federal. These teeth extend axially. A ratchet block is made of a magnetic material and has two end surfaces. The shape of this ratchet block is axially and slidably engaged in the teeth of the federal government. An end surface has a circumferential teeth, while a flywheel is also provided with circumferential teeth which are engaged in one direction in the circumferential teeth on the end surface. A permanent magnet is connected to the other end face which is not provided with any circumferential teeth.

The hub according to the first example is provided at its right end with an annular thread which is formed with teeth which are radially engaged in one of the discs and which is displaced relatively linearly to the disc. The rotor is provided with teeth which are radially engaged in the other disk so that the linear displacements can take place in both directions. The two surfaces of the two disks formed opposite each other have teeth which are engaged with each other. The annular thread, the two discs and the spring cooperate with each other to form a free wheel mechanism, wherein the two discs can be linearly displaced in both directions. When pedaling in the forward direction, the teeth between the two discs are shifted toward each other to transmit the torque. When pedaling in the reverse direction, the teeth are shifted one over the other between the two disks, this sliding movement being carried out together with the linear displacement in both directions, and the two disks being separated from each other to rotate the hub with no torque output.

The hub according to the second example is provided on the inside of the flywheel with circumferential ratchet teeth, wherein the Ratchet block opposite the flywheel is formed with circumferential ratchet teeth to be engaged in the end of the flywheel. This ratchet block is usually arranged with the permanent magnet in the collar, the ratchet block is moved linearly to the covenant. The circumferential ratchet teeth on the other side of the flywheel are fixed to allow linear translation in one direction between the ratchet block and the hub. This also fulfills the purpose that the hub transmits the torque in one direction only.

However, the teeth according to the two examples consist of an inclined and a vertical surface. Therefore, these teeth have a predetermined height and a different height between the next tooth. However, during the interactive operation between the disks or the ratchet blocks, the inclined surface is too large so that no gap is formed, resulting in wear due to the friction between the teeth. This friction causes a resistance, which slows down the linear displacement. Moreover, the smooth operations between the ratchet teeth are compromised because of the difference in height between the vertical surfaces of the teeth. As a result, the discs and ratchet blocks can not be quickly re-engaged, thereby reducing transmission sensitivity. Furthermore, a gap is formed between the discs and the spring, between the ratchet block and the permanent magnet and between the hub and the axle. The spring or permanent magnet is simply mounted to the axle while the two ends of the spring or permanent magnet are not well positioned so that the components tend to be tilted or tilted during actuation which interferes with the transmission of the ratcheting mechanism.

The present invention seeks to provide a hub assembly for overcoming the disadvantages of prior art hub assemblies.

SUMMARY OF THE INVENTION

In the present invention is a hub structure, which is provided from a hub having a first hole, wherein in the inner periphery of the first hole, a first groove is formed. The first groove is parallel to the hub axle, while an axle is inserted into the first hole. A tube shaft is provided with a second hole, while in the inner periphery of this second hole, a second groove is formed. The second groove is parallel to the axis of the tube shaft. A drive component is formed as an annular component and is provided on its outer periphery with a plurality of first teeth. The first teeth are located at a position corresponding to that of the second groove. The drive component is provided with a tapered first ratchet formed axially on the former and having two triangular contact surfaces to form a conical surface in the radial direction. The two triangular contact surfaces have different surfaces. The first teeth are engaged in the second groove, while the drive component is linearly displaced in this second groove. A passive component is formed as an annular component and has a plurality of second teeth on its outer periphery. These second teeth are located at a location corresponding to that of the first groove. The passive component is provided with a conical second ratchet formed axially on the former. The second teeth of the passive component are engaged in the first groove, the passive component being linearly displaced in the first groove. A reset component unit is formed with a respective return component, which are mounted between the hub and the passive component or between the tubular shaft and the drive component. The triangular conical first and second ratchets reduce the contact area and friction between the ratchets, making engagement and disengagement quicker and smoother.

The main object of the present invention is to provide a hub assembly wherein the two ratchets are interengaged and mounted between a drive component and a passive component. The teeth of the ratchets have two triangular contact surfaces in the radial direction to reduce the contact area. In the linear displacement of the drive component and the passive component as well as the disengagement from each other, a gap is formed between the teeth, so that the operation between the two ratchets can be done smoothly and faster.

It is a further object of the present invention to provide a hub assembly wherein the tube rod is mounted between the hub, the drive component, the passive component, and the tube shaft. The pipe rod guides the linear displacement between the drive component, the passive component and the return components.

Yet another object of the present invention is to provide a hub assembly wherein the drive component and the passive component each have a stop on one side to secure the return component, this embodiment being more practical to assemble.

The present invention will become more apparent from the following description with reference to the accompanying drawings which, for purposes of illustration only, show a preferred embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS

1 Fig. 12 is a perspective view showing the hub structure of the present invention;

2 Fig. 11 is an exploded view illustrating the hub structure of the present invention;

3 shows the cross-sectional view of the drive component;

4 shows the cross-sectional view of the passive component;

5 shows the cross-sectional view of the hub assembly of the present invention;

6 shows an enlarged cross-sectional view of the hub assembly of the present invention;

7 Fig. 12 is an enlarged cross-sectional view illustrating the disengagement of the teeth of the drive component from the passive component of the hub assembly of the present invention;

8th Fig. 11 is an exploded view showing the second embodiment of the hub structure of the present invention;

9 shows the cross-sectional view of the second embodiment of the hub assembly of the present invention, and

10 shows an enlarged cross-sectional view for illustrating the second embodiment of the hub assembly of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

With reference to the 1 to 7 For example, the hub assembly of the present invention is constructed of a ratchet mechanism that is interposed between a hub 10 and a tube shaft 20 is mounted, said ratchet mechanism of a drive component 30 in the tube shaft 20 , a passive component 40 in the hub 10 and composed of a reset component.

The hub 10 is hollow and has a first hole in one of its ends 11 on, in the inner periphery with a first groove 12 is provided. This first groove 12 runs parallel to the axis of the hub 10 while getting an axle 13 in the first hole 11 located. The first groove 12 has several notches in the inner periphery of the first hole 11 the hub 10 on.

The tube shaft 20 is formed as a hollow tubular member and is at one end with a second hole 21 provided in the inner periphery with a second groove 22 is provided. This second groove 22 runs parallel to the axis of the tube shaft 20 , The second groove 22 has several notches in the inner periphery of the second hole 21 on.

The drive component 30 is as an annular component with multiple first teeth 31 formed on its outer periphery. These first teeth 31 are formed in one place, those of the second groove 22 equivalent. The drive component 30 has a first conical ratchet 32 axially formed on the former, said first ratchet 32 with several conical notches 33 or projections is provided.

In this embodiment, the first ratchet 32 several cone-shaped notches 33 on. Each of these notches 33 in the radial direction is with a first contact surface 34 and a second interface 35 Mistake. Each of the first and second interfaces 34 . 35 are shaped as triangular surfaces, with the first interface 34 smaller than the second interface 35 , The drive component 30 is on with a first stop 36 provided axially on one side of these drive components 30 and at a distance to the first ratchet 32 protrudes. In this embodiment, two first stops 36 educated. The first teeth 31 move into the second groove 22 while the drive component 30 linear in this second groove 22 can be moved.

The passive component 40 is formed as an annular component and has on its outer periphery a plurality of second teeth 41 on. These second teeth 41 are formed in one place, that of the first groove 32 equivalent. The passive component 40 has a second conical ratchet 42 axially formed on the former, said second ratchet 42 in the first ratchet 32 is indented. The second ratchet 42 points to the first ratchet 32 several conical projections 43 or scores on. All projections 43 each have a third contact surface in the radial direction 44 and a fourth interface 45 on. These third and fourth interfaces 44 . 45 are formed as triangular surfaces. Here is the third interface 44 less than the fourth Touchpad 45 , The first and third contact surfaces 34 . 44 as well as the second and fourth contact surfaces 35 . 45 agree with each other. The passive component 40 is with a second stop 46 provided axially on one side of this stop 46 and at a distance of the second ratchet 42 protrudes. In this embodiment, two second stops 46 educated. The second teeth 41 the passive component 40 are in the first groove 12 indented, with the passive component 40 linear in this first groove 12 indented, with the passive component 40 linear in this first groove 12 can be moved.

The reset component unit is each provided with a reset component ( 5 ) between the hub 10 and the passive component 40 or between the tube shaft 20 and the drive component 30 assembled. The reset component 50 consists of a first magnet 51 and a second magnet 52 , The first magnet 51 is with the passive component 40 and at a distance to the second ratchet 42 connected. The first magnet 51 is between the two second attacks 46 arranged while the second magnet 52 in the first hole 11 the hub 10 located. The two respective opposite ends of the first and second magnets 51 . 52 have the same magnetic pole. The first magnet 51 is on the drive component 30 attached and located at a distance to the first ratchet 32 , The first magnet 51 is between the first two attacks 36 arranged while the second magnet 52 in the second hole 21 the tube shaft 20 located. Two respective opposite ends of the first and second magnets 51 . 52 have the same magnetic pole. Due to the magnetic repulsion force, the drive component becomes the passive component 40 too rotated.

The inner diameter of the pipe rod 60 is greater than the diameter of the axis 13 , wherein the inner diameter of the pipe rod 60 however, less than that of the drive component 30 , the passive component 40 and the reset component 50 , The pipe bar 60 is on the axis 13 mounted and located between the axle 13 and the drive component 30 as well as between the passive component 40 and the reset component 50 , With the tube bar 60 becomes the linear displacement of the drive component 30 , the passive component 40 and the reset component 50 guided.

When rotating the drive component 30 with the tube shaft 20 becomes the third interface 44 the second ratchet 42 to rotate the hub 10 with the first contact surface 34 the first ratchet 32 pushed. When rotating the tube shaft 20 in the opposite direction becomes the second interface 35 the first ratchet 32 relative to the fourth interface 45 the second ratchet 42 moved, which is due to the linear displacements between the drive component 30 and the tube shaft 20 as well as between the passive component 40 and the hub 10 is effected, wherein the drive component 30 from the passive component 40 disengaged and because of the linear displacement a gap S is formed.

As mentioned above, the drive component 30 , passive component 40 and the reset component 50 in the hub 10 and in the tube shaft 20 shifted linearly. By engaging between the conical surfaces of the first and second ratchets 32 . 42 The contact surface between the conical surfaces is reduced from two triangular surfaces in order to minimize the friction. The gap S between the drive component 30 and the passive component 40 allows faster engagement and disengagement to allow the transmission to be as smooth as possible.

Like in the 5 and in the 6 shown, the first ratchet when actuated 32 the drive component 30 in the second ratchet 42 the passive component 40 indented, what with the power of the reset component 50 and with the rotation of the tube shaft 20 is effected while the first interface 34 and the third touch area 44 be pushed towards each other to the first and second ratchet 32 . 42 engage. Like in the 7 shown, becomes the second interface 35 the first ratchet 32 when rotating in the opposite direction relative to the fourth interface 45 the second ratchet 42 moves, with the gap S due to the linear displacements between the first and third contact surfaces 34 . 44 is formed and the first and second ratchets 32 . 42 be disassembled from each other. By the force of the return components 50 become the driving component 30 and the passive component 40 reset to the first and second ratchets 32 . 42 reconnect again.

The 8th to 10 show a second embodiment of the present invention, wherein here the reset components 50 as elastic components 53 , z. As springs are executed. This elastic component 53 is between the first hole 11 the hub 10 and the passive component 40 attached. One end of this elastic component 53 is between the second stops 46 the passive component 40 while the other elastic component 53 between the tube shaft 20 and the drive component 30 is mounted. One end of the elastic component 53 is located between the first stops 36 the drive component 30 , The first and second ratchets 32 . 42 are indented, with the drive component 30 with the elastic component 53 on the passive component 40 to be moved.

The first and second ratchets 32 . 42 have notches 33 and projections 43 on, with all notches 33 and projections 43 are provided with a tapered portion formed with two inclined triangular faces to reduce the contact area, thereby avoiding friction. When rotating in the opposite direction is between the drive component 30 and the passive component 40 because of the linear displacements a gap S formed around the first and second ratchets 32 . 42 by the force of the return components 50 quickly and re-engage. The pipe bar 60 is on the axis 13 mounted and located between the axle 13 and the drive component 30 as well as between the passive component 40 and the restoring force 50 , The linear displacement of the drive component, the passive component 40 and the restoring force 50 is with the tube bar 60 guided.

The reset components 50 be with the first and second stops 36 . 46 the drive component 30 and the passive component 40 positioned to prevent tilting during operation.

Notwithstanding the above-described illustration and description of the inventive embodiment, it will be apparent to those skilled in the art that other embodiments may be practiced without departing from the scope of the present invention.

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• TW 088117780 [0005]
• TW 096219278 [0006]

Claims (7)

A hub assembly, composed of: a hub ( 10 ) with a first hole ( 11 ) in one end and with a groove ( 12 ) in an inner periphery of this first hole ( 11 ), wherein the first groove ( 12 ) parallel to an axis of the hub ( 10 ) and in the first hole ( 11 ) a hub axle ( 13 ) is formed; a tubular shaft ( 20 ) with a second hole ( 21 ) in one end and with a groove ( 22 ) in an inner periphery of this second hole ( 21 ), this second groove ( 22 ) parallel to an axis of this tube shaft ( 20 ) runs; a drive component ( 30 ), which are designed as an annular component and on an outer periphery with a plurality of first teeth ( 31 ) at a position that of the second groove ( 22 ), this drive component ( 30 ) with a conical first ratchet ( 32 ) formed axially on the former and having two triangular contact surfaces ( 34 ), which form a conical surface in the radial direction; the two triangular interfaces ( 34 ) have different areas; the first teeth ( 31 ) into the second groove ( 22 ) while the drive component ( 30 ) linear in this second groove ( 22 ) is moved; a passive component ( 40 ), which are designed as an annular component and on the outer periphery with a plurality of second teeth ( 41 ), these teeth ( 41 ) at a position, that of the first groove ( 12 ), are formed; the passive component ( 40 ) with a conical second ratchet ( 42 ) formed axially on the former; the second teeth ( 41 ) of the passive component ( 40 ) into the first groove ( 12 ) and the passive component ( 40 ) linear in the first groove ( 12 ), and a reset component unit each having a reset component ( 50 ) between the hub ( 10 ) and the passive component ( 40 ) or between the tubular shaft ( 20 ) and the drive component ( 30 ) is mounted. The hub assembly according to claim 1, characterized in that the first groove ( 12 ) with several notches ( 33 ) in the inner periphery of the first hole ( 11 ) the hub ( 10 ) and the second groove ( 22 ) also with several notches ( 43 ) in the inner periphery of the second hole ( 21 ) the hub ( 10 ) is provided. The hub assembly according to claim 1, characterized in that the first ratchet ( 32 ) with several conical notches ( 33 ) or protrusions, all notches ( 33 ) or protrusions in the radial direction a first contact surface ( 34 ) and a second interface ( 35 ), which are formed as a triangular surface, wherein the first contact surface ( 34 ) smaller than the second interface ( 35 ); the second ratchet ( 42 ) opposite the first ratchet ( 32 ) is provided with a plurality of projections or notches; all protrusions or notches in the radial direction a third contact surface ( 44 ) and a fourth touchpad ( 45 ), wherein all of these third and fourth contact surfaces ( 44 . 45 ) are formed with a triangular surface; the third interface ( 44 ) smaller than the fourth interface ( 45 ); the first and second ratchets ( 32 . 42 ) are engaged with each other; the first and third contact surfaces ( 34 . 44 ) as well as the second and fourth contact surfaces 35 . 45 ) agree with each other. The hub assembly according to claim 1, characterized in that the drive component ( 30 ) with a first stop ( 36 ) provided axially on one side of said drive component ( 30 ) and at a distance to the first ratchet ( 32 ) is shaped; the passive component ( 40 ) with a second stop ( 46 ) axially on one side of this passive component ( 40 ) protrudes and at a distance to the second ratchet ( 42 ) is shaped; the reset components ( 50 ) each with the two respective attacks ( 36 . 46 ) are positioned. The hub assembly according to claim 1, characterized in that the reset component ( 50 ) as a magnet of a first magnet ( 51 ) and a second magnet ( 52 ), wherein the first magnet ( 51 ) on the passive component ( 40 ) and at a distance to the second ratchet ( 42 ), while the second magnet ( 52 ) in the first hole ( 11 ) the hub ( 10 ) is arranged; both respective opposite ends of the first and the second magnet ( 51 . 52 ) have the same magnetic pole; the first magnet ( 51 ) on the drive component ( 30 ) and at a distance to the first ratchet ( 32 ), while the second magnet ( 52 ) in the second hole ( 21 ) of the tube shaft ( 20 ) and both respective ends of the first and second magnets ( 51 . 52 ) have the same magnetic pole. The hub assembly according to claim 1, characterized in that the reset component ( 50 ) as an elastic component ( 53 ) is formed. The hub assembly according to claim 1, characterized in that an inner diameter of the tubular rod ( 60 ) is greater than the diameter of the axis ( 13 ), wherein the inner diameter of the tubular rod ( 13 ) is smaller than a diameter of the reset component ( 50 ), the passive component ( 40 ) and the drive component ( 30 ); the pipe bar ( 60 ) on the axis ( 13 ) and between the axis ( 13 ) and the drive component ( 30 ) such as between the passive component ( 40 ) and the reset component ( 50 ) is attached.

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