GB2563690A - Ratchet wheel hub having a releasable central assembly - Google Patents
Ratchet wheel hub having a releasable central assembly Download PDFInfo
- Publication number
- GB2563690A GB2563690A GB1716861.8A GB201716861A GB2563690A GB 2563690 A GB2563690 A GB 2563690A GB 201716861 A GB201716861 A GB 201716861A GB 2563690 A GB2563690 A GB 2563690A
- Authority
- GB
- United Kingdom
- Prior art keywords
- annular
- flange
- ring
- wheel hub
- bicycle
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 230000007246 mechanism Effects 0.000 claims abstract description 20
- 230000008901 benefit Effects 0.000 description 3
- 230000008439 repair process Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B27/00—Hubs
- B60B27/02—Hubs adapted to be rotatably arranged on axle
- B60B27/04—Hubs adapted to be rotatably arranged on axle housing driving means, e.g. sprockets
- B60B27/047—Hubs adapted to be rotatably arranged on axle housing driving means, e.g. sprockets comprising a freewheel mechanisms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/06—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface
- F16D41/064—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls
- F16D41/066—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical
- F16D41/067—Freewheels or freewheel clutches with intermediate wedging coupling members between an inner and an outer surface the intermediate members wedging by rolling and having a circular cross-section, e.g. balls all members having the same size and only one of the two surfaces being cylindrical and the members being distributed by a separate cage encircling the axis of rotation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D41/00—Freewheels or freewheel clutches
- F16D41/24—Freewheels or freewheel clutches specially adapted for cycles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Axle Suspensions And Sidecars For Cycles (AREA)
- Braking Arrangements (AREA)
Abstract
A wheel hub of a bicycle comprises an inner ring 10 includes an inner surface 11 operatively connected to and driven by a drive mechanism (Figure 1, A), and an outer surface 12. An outer ring 20 includes an inner surface 21 and an outer surface 22 operatively connected to and driven by a driven mechanism (Figure 1, B). Further a central assembly 30 is releasably disposed between the inner ring and the outer ring. The central assembly includes a ring member (Figure 2A, 31) having holes 311, and a ratchet assembly (Figure 2A, 332) including biasing members 321 each disposed in a hole, and detents 322 again, disposed in a hole with the biasing member. The detent is in a first position P1 contacting the inner surface of the outer ring and the outer surface of the inner ring and transmitting drive or a second position P2 only contacting the outer surface of the inner ring enabling freewheeling.
Description
RATCHET WHEEL HUB HAVING A RELEASABLE CENTRAL ASSEMBLY
BACKGROUND OF THE INVENTION 1. Field of the Invention
The invention relates to bicycle wheel hubs and more particularly to a rear wheel hub of a bicycle, the rear wheel hub being a ratchet and having a releasable central assembly. 2. Description of Related Art
Price of a rear hub of a bicycle is high especially a racing bicycle. It is economical to replace a worn component of the hub. However, all conventional hubs of bicycles do not have replaceable components. It is thus required to replace a worn hub with a new one even when only one component thereof is malfunctioned. This is a waste. Thus, the need for improvement still exists.
SUMMARY OF THE INVENTION
It is therefore one object of the invention to provide a wheel hub of a bicycle comprising an inner ring including an inner surface operatively connected to and driven by a drive mechanism, and an outer surface; an outer ring including an inner surface placed on the outer surface of the inner ring, and an outer surface operatively connected to and driven by a driven mechanism; and a central assembly releasably disposed between the outer surface of the inner ring and the inner surface of the outer ring, the central assembly including a ring member disposed between the outer surface of the inner ring and the inner surface of the outer ring and being coaxial therewith, the ring member having a plurality of equally spaced holes on its outer surface, and a ratchet assembly including a plurality of biasing members each disposed in the hole, and a plurality of detents each disposed in the hole by the biasing member; wherein the detent is configured to dispose in a first position contacting the inner surface of the outer ring and the outer surface of the inner ring or in a second position contacting the outer surface of the inner ring but not contacting the inner surface of the outer ring.
The above and other objects, features and advantages of the invention will become apparent from the following detailed description taken with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a ratchet type rear wheel hub of a bicycle according to the invention; FIG. 2A is an exploded view of the rear wheel hub; FIG. 2B is a fragmentary view of the central assembly; FIG. 3 is a perspective view of the assembled rear wheel hub; FIG. 4A is a sectional view of the rear wheel hub of FIG. 3 showing a first embodiment of the invention; FIG. 4B is another sectional view of the rear wheel hub of FIG. 3 showing a second embodiment of the invention; FIG. 5A is yet another sectional view of the rear wheel hub of FIG. 3 showing a third embodiment of the invention; FIG. 5B is a further sectional view of the rear wheel hub of FIG. 3 showing a fourth embodiment of the invention; FIG. 6A is a sectional view of the rear wheel hub of FIG. 3 showing a clockwise pedaling of the bicycle; FIG. 6B is a greatly enlarged view of a portion of FIG. 6A; FIG. 7A is a sectional view of the rear wheel hub of FIG. 3 showing a counterclockwise pedaling of the bicycle; FIG. 7B is a greatly enlarged view of a portion of FIG. 7A; FIG. 8A is a sectional view of the rear wheel hub of FIG. 3 showing a non-pedaling of the bicycle; FIG. 8B is a greatly enlarged view of a portion of FIG. 8A; FIG. 9A schematically depicts the central assembly at the first position P1; and FIG. 9B schematically depicts the central assembly at the second position P2.
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIGS. 1 to 9B, a bicycle wheel hub in accordance with the invention comprises the following components as discussed in detail below.
An inner ring 10, an outer ring 20 and a central assembly 30 are provided. The inner ring 10 includes an inner surface 11 operatively connected to and driven by a drive mechanism A, and an outer surface 12. The outer ring 20 is placed on the outer surface 12 and includes an inner surface 21 placed on the outer surface 12, and an outer surface 22 connected to and driven by a driven mechanism B. The central assembly 30 is disposed between the outer surface 12 of the inner ring 10 and the inner surface 21 of the outer ring 20. The central assembly 30 includes a ring member 31 and a ratchet assembly 32. The ring member 31 is disposed between the outer surface 12 of the inner ring 10 and the inner surface 21 of the outer ring 20 and is coaxial therewith. The ring member 31 includes a plurality of equally spaced holes 311 on its outer surface. The ratchet assembly 32 includes a plurality of sets of two biasing members 321 (or called elastic members), each set of the biasing members 321 disposed in the hole 311, and a plurality of detents 322 each disposed in the hole 311. The detent 322 is held in the hole 311 by the set of the biasing members 321. The detent 322 is configured to dispose in a first position P1 contacting the outer surface 12 of the inner ring 10 and the inner surface 21 of the outer ring 20 (see FIG. 6B) or in a second position P2 contacting the outer surface 12 of the inner ring 10 but not the inner surface 21 of the outer ring 20 (see FIGS. 7B and 8B). In the first position P1, the detent 322 contacts the outer surface 12 of the inner ring 10 and the inner surface 21 of the outer ring 20 so that force can only be transmitted from the inner ring 10 to the outer ring 20. In the second position P2, the detent 322 only contacts the outer surface 12 of the inner ring 10 and disengages from the inner surface 21 of the outer ring 20 so that force cannot be transmitted from the inner ring 10 to the outer ring 20. An individual may pull out the central assembly 30 and replace it with a new one if there is any malfunctioned component of the central assembly 30. Thereafter, the malfunctioned central assembly 30 can be repaired rather than discarded. This saves money for a bicycle user.
The outer surface 12 is provided with a plurality of spaced drive rectangles 121 each disposed in a corresponding position with respect to the hole 311. The drive rectangle 121 is configured to push the corresponding detent 322 from the second position P2 to the first position P1. The number of the holes 311 is N which is an integer greater than 3.
The ring member 31 further comprises a limiting member such as an annular first flange 33A, an annular second flange 33B, an annular third flange 33C or an annular fourth flange 33D. Thus, the ring member 31 has the following 4 embodiments:
In a first embodiment as shown FIG. 4A, the limiting member is the annular first flange 33A.
In a second embodiment as shown FIGS. 2A, 2B, 3 and 4B, the limiting member includes the annular first flange 33A and the annular second flange 33B. The inner ring 10 further comprises an annular groove 13A on one edge adjacent to the annular second flange 33B. The outer ring 20 further comprises an annular groove 23A on one edge adjacent to the annular second flange 33B. The annular second flange 33B is positioned in the annular groove 13A and the annular groove 23A.
In a third embodiment as shown in FIG. 5A, the limiting member includes the annular third flange 33C and the annular fourth flange 33D. The inner ring 10 further comprises an annular groove 13A on one edge adjacent to the annular third flange 33C. The outer ring 20 further comprises an annular groove 23B on one edge adjacent to the annular fourth flange 33D. The annular third flange 33C is positioned in the annular groove 13A and the fourth flange 33D is positioned in the annular groove 23B respectively.
In a fourth embodiment as shown in FIG. 5B, the limiting member includes the annular third flange 33C and the annular fourth flange 33D. The outer ring 20 further comprises an annular groove 23A on one edge adjacent to the annular fourth flange 33D. The annular third flange 33C is positioned in the annular groove 23A. The inner ring 10 further comprises an annular groove 13B on one edge adjacent to the annular first flange 33A. The annular fourth flange 33D is positioned in the annular groove 23A and the third flange 33C is positioned in the annular groove 13B respectively.
The drive mechanism A is implemented as a derailleur or a ratchet of a bicycle. The driven mechanism B is implemented as a rear wheel hub.
The invention is directed to a rear wheel hub of a bicycle and has the following three operation models:
In a first operation model, a driver may clockwise pedal to transmit power to the drive mechanism Avia a train and two sprocket wheels. And in turn, the inner ring 10 rotates (see FIG. 6A). In detail, the drive rectangles 121 drive the detents 322. Next, the detents 322 move from the second position P2 to the first position P1 to contact the outer surface 12 (i.e., the drive rectangles 121) of the inner ring 10 and the inner surface 21 of the outer ring 20. As a result, the driven mechanism B is driven by the outer ring 20.
In a second operation model, a driver may counterclockwise pedal to transmit power to the drive mechanism A via a train and two sprocket wheels. And in turn, the inner ring 10 rotates (see FIG. 7A). In detail, the drive rectangles 121 drive the detents 322. Then the detents 322 move from the first position P1 to the second position P2 with each set of the biasing members 321 compressed. At the second position P2, the detents 322 contact the outer surface 12 (i.e., the drive rectangles 121) of the inner ring 10 but not the inner surface 21 of the outer ring 20 (as indicated by a distance D between the detent 322 and the inner surface 21 of the outer ring 20). Power is not transmitted from the inner ring 10 to the outer ring 20. As a result, the driven mechanism B is not driven by the outer ring 20.
In a third operation model, a driver may not pedal. As shown in FIGS. 8A and 8B, in response to wheeling along a down hill road, the inner surface 21 of the outer ring 20 disengages from the detents 322 so that the detents 322 move from the first position P1 to the second position P2 with each set of the biasing members 321 compressed. At the second position P2, the detents 322 contact the outer surface 12 (i.e., the drive rectangles 121) of the inner ring 10 but not the inner surface 21 of the outer ring 20 (as indicated by a distance D between the detent 322 and the inner surface 21 of the outer ring 20). As a result, the detents 322 are held in place at the second position P2.
It is understood that the rear wheel hub (mainly the driven mechanism B) is expensive. Further, the derailleur or the ratchet wheel (e.g., the drive mechanism A) is expensive. It is envisaged by the invention that in case of a malfunction of the inner ring 10, the outer ring 20, the central assembly 30, the drive mechanism A or the driven mechanism B, a driver may remove the central assembly 30 out of a location between the outer surface 12 of the inner ring 10 and the inner surface 21 of the outer ring 20 for repair rather than the whole wheel hub.
The invention has the following advantages and benefits in comparison with the conventional art: After the removal of the central assembly 30, a replacement of the malfunctioned components (e.g., the rollers 322) with new ones is sufficient. Thus, cost is saved. Further, tools and operations such as unfastening of screws, fastening of screws, etc. are not required. Thus, repair time is greatly decreased.
While the invention has been described in terms of preferred embodiments, those skilled in the art will recognize that the invention can be practiced with modifications within the scope of the appended claims.
Claims (9)
1. A wheel hub of a bicycle comprising: an inner ring including an inner surface operatively connected to and driven by a drive mechanism, and an outer surface; an outer ring including an inner surface placed on the outer surface of the inner ring, and an outer surface operatively connected to and driven by a driven mechanism; and a central assembly releasably disposed between the outer surface of the inner ring and the inner surface of the outer ring, the central assembly including a ring member disposed between the outer surface of the inner ring and the inner surface of the outer ring and being coaxial therewith, the ring member having a plurality of equally spaced holes on its outer surface, and a ratchet assembly including a plurality of biasing members each disposed in the hole, and a plurality of detents each disposed in the hole by the biasing member; wherein the detent is configured to dispose in a first position contacting the inner surface of the outer ring and the outer surface of the inner ring or in a second position contacting the outer surface of the inner ring but not contacting the inner surface of the outer ring.
2. The wheel hub of a bicycle of claim 1, wherein the outer surface of the inner ring includes a plurality of spaced drive planes each disposed in a corresponding position with respect to the hole, the drive plane being configured to push the corresponding detent from the second position to the first position.
3. The wheel hub of a bicycle of claim 2, wherein the number of the holes is N which is an integer greater than 3.
4. The wheel hub of a bicycle of claim 1, wherein the ring member further comprises a limiting member which is an annular first flange, an annular second flange, an annular third flange or an annular fourth flange.
5. The wheel hub of a bicycle of claim 4, wherein the limiting member is the annular first flange.
6. The wheel hub of a bicycle of claim 4, wherein the limiting member includes the annular first flange and the annular second flange, the inner ring further comprises an annular groove on one edge adjacent to the annular second flange, the outer ring further comprises an annular groove on one edge adjacent to the annular second flange, and the annular second flange is positioned in the annular groove of the inner ring and the annular groove of the outer ring.
7. The wheel hub of a bicycle of claim 4, wherein the limiting member includes the annular third flange and the annular fourth flange, the inner ring further comprises an annular groove on one edge adjacent to the annular third flange, the outer ring further comprises an annular groove on one edge adjacent to the annular fourth flange, the annular third flange is positioned in the annular groove of the inner ring, and the fourth flange is positioned in the annular groove of the outer ring.
8. The wheel hub of a bicycle of claim 4, wherein the limiting member includes the annular fourth flange and the annular third flange, the outer ring further comprises an annular groove on one edge adjacent to the annular fourth flange, the annular third flange is positioned in the annular groove of the outer ring, the inner ring further comprises an annular groove on one edge adjacent to the annular first flange, the annular fourth flange is positioned in the annular groove of the outer ring, and the third flange is positioned in the annular groove of the inner ring.
9. The wheel hub of a bicycle of claim 1, wherein the drive mechanism is implemented as a derailleur of a bicycle or a ratchet of a bicycle, and the driven mechanism is implemented as a rear wheel hub of a bicycle.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW106209140U TWM548633U (en) | 2017-06-23 | 2017-06-23 | One-way transmission device having central swap part |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB201716861D0 GB201716861D0 (en) | 2017-11-29 |
| GB2563690A true GB2563690A (en) | 2018-12-26 |
Family
ID=60419392
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1716861.8A Withdrawn GB2563690A (en) | 2017-06-23 | 2017-10-13 | Ratchet wheel hub having a releasable central assembly |
Country Status (2)
| Country | Link |
|---|---|
| GB (1) | GB2563690A (en) |
| TW (1) | TWM548633U (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3972573A (en) * | 1975-08-18 | 1976-08-03 | The Torrington Company | Cage for an overrunning clutch |
| JPH03288025A (en) * | 1990-04-04 | 1991-12-18 | Nippo Sangyo Kk | One way clutch |
| US5617937A (en) * | 1994-11-30 | 1997-04-08 | Ina Walzlager Schaeffler Kg | Rotation preventing device for a plastic cage of an overrunning clutch |
| US5662197A (en) * | 1994-10-12 | 1997-09-02 | Shimano, Inc. | Bicycle roller clutch |
| US5695031A (en) * | 1995-06-27 | 1997-12-09 | Ntn Corporation | One-way clutch |
| US6095302A (en) * | 1999-03-31 | 2000-08-01 | China Hua Yang Rolling Bearing Co. | One way clutch bearing |
| US20020005325A1 (en) * | 2000-06-30 | 2002-01-17 | Shigeyuki Yamada | One-way clutches |
| CN104595381A (en) * | 2015-01-26 | 2015-05-06 | 吉林大学 | Bidirectional controllable overrunning clutch |
-
2017
- 2017-06-23 TW TW106209140U patent/TWM548633U/en not_active IP Right Cessation
- 2017-10-13 GB GB1716861.8A patent/GB2563690A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3972573A (en) * | 1975-08-18 | 1976-08-03 | The Torrington Company | Cage for an overrunning clutch |
| JPH03288025A (en) * | 1990-04-04 | 1991-12-18 | Nippo Sangyo Kk | One way clutch |
| US5662197A (en) * | 1994-10-12 | 1997-09-02 | Shimano, Inc. | Bicycle roller clutch |
| US5617937A (en) * | 1994-11-30 | 1997-04-08 | Ina Walzlager Schaeffler Kg | Rotation preventing device for a plastic cage of an overrunning clutch |
| US5695031A (en) * | 1995-06-27 | 1997-12-09 | Ntn Corporation | One-way clutch |
| US6095302A (en) * | 1999-03-31 | 2000-08-01 | China Hua Yang Rolling Bearing Co. | One way clutch bearing |
| US20020005325A1 (en) * | 2000-06-30 | 2002-01-17 | Shigeyuki Yamada | One-way clutches |
| CN104595381A (en) * | 2015-01-26 | 2015-05-06 | 吉林大学 | Bidirectional controllable overrunning clutch |
Also Published As
| Publication number | Publication date |
|---|---|
| GB201716861D0 (en) | 2017-11-29 |
| TWM548633U (en) | 2017-09-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |