GB2127113A - Freewheel hub for a cycle - Google Patents
Freewheel hub for a cycle Download PDFInfo
- Publication number
- GB2127113A GB2127113A GB08324444A GB8324444A GB2127113A GB 2127113 A GB2127113 A GB 2127113A GB 08324444 A GB08324444 A GB 08324444A GB 8324444 A GB8324444 A GB 8324444A GB 2127113 A GB2127113 A GB 2127113A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hub
- drive member
- hub sleeve
- freewheel
- spindle
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M9/00—Transmissions characterised by use of an endless chain, belt, or the like
- B62M9/04—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio
- B62M9/06—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like
- B62M9/10—Transmissions characterised by use of an endless chain, belt, or the like of changeable ratio using a single chain, belt, or the like involving different-sized wheels, e.g. rear sprocket chain wheels selectively engaged by the chain, belt, or the like
-
- 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
- B60B27/023—Hubs adapted to be rotatably arranged on axle specially adapted for bicycles
-
- 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
- F16D41/30—Freewheels or freewheel clutches specially adapted for cycles with hinged pawl co-operating with teeth, cogs, or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Rolling Contact Bearings (AREA)
- Labeling Devices (AREA)
- Holding Or Fastening Of Disk On Rotational Shaft (AREA)
- Mounting Of Bearings Or Others (AREA)
- Axle Suspensions And Sidecars For Cycles (AREA)
- Arrangement And Mounting Of Devices That Control Transmission Of Motive Force (AREA)
Abstract
The hub spindle (1) consists of two parts (17, 23) axially disengageably coupled with one another. The first part is independently securable to the frame (15) of the cycle, and a drive member (5) is rotatably mounted thereon. On the second spindle part (23) a hub sleeve (3) is mounted by ball bearings (51, 53). A pawl freewheel (13) with radial pawls (73) mounted in the hub sleeve (3) couples the drive member (5) with the hub sleeve. A stop (81) formed preferably by the outer race ring (57) of the adjacent ball bearing (53) holds the pawls (73) approximately in the position determined by a pawl toothing (79) of the drive member (5), even when the hub sleeve (3) is removed. The hub sleeve (3) can be removed from the drive member (5) and fitted on to it again without problem after the removal of the insertable second spindle part (23). The hub sleeve and spacer (71) are clamped in position by a cap (43) cooperable with eccentrics (41) on a pin having a hand lever (45). <IMAGE>
Description
SPECIFICATION
Freewheel hub for a cycle
The invention relates to a freewheel hub for a cycle and especially a freewheel hub the hub sleeve of which is coupled with a drive member carrying at least one chain wheel, in such a way as to be removable in practical use.
From German Patent No. 1,155,355 a freewheel hub for a cycle is known the hub sleeve of which is disengageably coupled through a pawl freewheel with a drive member carrying a plurality of chain wheels. The drive member is mounted rotatably on a first spindle part and can be secured by means of this spindle part as an independent unit on the frame of the cycle. The hub sleeve is mounted rotatably but axially fixedly by means of two ball bearings in the region of its spoke flanges on a second spindle part.
The second spindle part is couplable with the first spindle part by means of a clamping screw penetrating coaxially through the first spindle part. The freewheel coupling comprises pawls mounted pivotably about radial axes on the drive member and a pawl toothing in which the pawls engage under resilient initial stress. The space requirement ofthe pawls within the drive member necessitates special chain wheels with stepped internal diameter.
Although in the known freewheel hub the hub sleeve can be removed from the drive member without necessity of modifying the chain setting, the withdrawal of the rear wheel from the cycle frame becomes difficult since the spindle part on which the hub sleeve is mounted is not a push-in part. The bearing cones of the two ball bearings mounting the hub sleeve are secured on this spindle part.
From British Patent No. 26398 a drive hub for a cycle is known in which the drive member carrying a chain wheel is mounted rotatably on the first spindle part and can be secured by means of th is spindle part as one unit to the frame of the cycle. The hub sleeve is mounted with the aid of two ball bearings on a second spindle part which can be inserted from the side remote from the drive member and screwed to the first spindle part. The known drive hub does not comprise a freewheel coupling.
From French Patent No. 997,737 a freewheel hub is known in which a hub sleeve and a drive member carrying the chain wheel are mounted rotatably on a one-piece common hub spindle The hub sleeve thus cannot be removed in practical operation with the drive member installed in the frame of the cycle. The pawl freewheel coupling comprises pawl mounted radially pivotably on the drive member and a pawl toothing on the hub sleeve.
It is the problem of the invention to indicate a freewheel hub for a cycle the hub sleeve of which can be removed without problem from the drive member secured on the cycle, and attached again.
The freewheel hub according to the invention comprises a hub spindle which can be divided axially in practical operation. A first one of the two spindle parts of the hub spindle is separately securable to the rear wheel fork. On this first spindle part a drive member provided with chain wheels is rotatably mounted. The hub sleeve provided with spoke flanges is mounted rotatably on the second spindle part and can be separated from the drive member without necessity of removing this from the rear wheel fork. The rotatation-fast connection between the drive member and the hub sleeve is produced by a pawl freewheel coupling the pawls of which are radially pivotably mounted on the hub sleeve and engage resiliently in a pawl toothing formed by axial grooves of the drive member.A radial stop on the hub sleeve limits the pivoting movement of the pawls and holds the pawls, when the hub sleeve is removed, approximately in the position which the pawls assume in engagement in the pawl toothing. In this way the hub sleeve can be pushed axially on to the drive member and coupled therewith. The stop preferably holds the pawl pivoted radially inwards slightly further than would correspond to the position of engagement, in order to secure correct engagement of the pawls in the pawl toothing. In this case ramps are provided on the radially outer edge on the pawl side of the drive member and on the pawl tip on the driver side.
The ball bearings which mount the hub sleeve on the second spindle part are preferably groove-type ball bearings in which the inner and outer bearing race rings are firmly connected axially with one another through the balls. Such ball bearings, produced as complete units, have relatively slight play so that the bearing cones provided in conventional cycle hubs for the adjustment of the axial bearing play become superfluous. The second spindle part, since no bearing race rings have to be secured to it, is insertable axially into the hub sleeve, which facilitates the assembly of the hub sleeve with the drive member. Separate stops formed on the hub sleeve for the pawls of the freewheel are superfluous if the outer bearing ring protrudes into the pivot path of the pawls and at the same time forms the mentioned stop.For the axial fixing of the hub sleeve a distance sleeve can be provided between the inner bearing race rings of the two ball bearings, while axially outside the inner bearing rings on the one side a separate distance ring and on the other side the first spindle part rest against the inner bearing race rings.
For the constructional simplification of the drive member it is provided on its external circumference with axial grooves extending over its entire length which both form the pawl toothing and produce the rotation-fast connection of the drive member with the chain wheel.
An example of embodiment of the invention is to be explained in greater detail below by reference to a drawing. In its upper half the drawing shows an axial longitudinal section through a freewheel hub of a cycle and in its lower half it shows a plan view of this freewheel hub.
The freewheel hub comprises a hub spindle designated generally by ion which a hub sleeve 3 and axially beside the hub sleeve 3 a drive member 5 are rotatably mounted. The hub sleeve 3 carries two spoke flanges 7, 9 spaced axially from one another.
On the drive member 5 there are fixedly seated several chain wheels 11, merely entered in chain lines. A pawl freewheel 13 couples the drive member 5 in one direction of rotation fast in rotation with the hub sleeve, while in the other direction of rotation it is freely rotatable in relation to the hub sleeve 3. The hub spindle 1 is secured on a rear wheel fork 15 of the cycle.
The hub spindle 1 is made axially divisible and comprises a first spindle part 17 which has an axial threaded bore 19 at its one end into which a threaded extension piece 21 of a second spindle part 23 passing through the hub sleeve 3 is screwed. The spindle part 17 is provided at its end remote from the hub sleeve 3 with an external threading 25 and is screwed fast to the rear fork 15 with the aid of two nuts 27, 29. The drive member 5 is mounted on the spindle part 17 through two ball bearings 31,33. The outer race tracks of the ball bearings 31, 33 are formed on the drive member 5 of sleeve form. While the inner race ring of the ball bearing 31 is formed on the spindle part 17, the inner race ring of the ball bearing 33 is formed by an adjusting cone 35 which is screwed on to the threading 25 and locked by means of the nut 27.
The spindle part 23 can be inserted axially into the hub sleeve 3 from outside the rear wheel fork 15 and carries on its end remote from the spindle part 17 an eccentric tightening device 37 having an eccentric 39 rotatably mounted in the spindle part 23, the rotation axis of which eccentric extends eccentrically in relation to cylindrical tightening flanges 41 which are mounted rotatably in a cap 43. The eccentric 39 and the tightening flanges 41 are connected integrally with a tightening lever 45 extending transversely of the eccentric 39. On pivoting of the tightening lever 45 the tightening cap 43 is displaced axially in relation to the spindle part 23.
In the region of its spoke flanges 7, 9 the hub sleeve 3 carries a groove-type ball bearing 51 and 53 respectively in each of hollow cylindrical, axially outwardly open apertures 47 and 49. The groovetype ball bearings 51,53 each comprise an outer bearing race ring 55 and 57 each of which fixes an inner bearing race ring 63 and 65 respectively, both axially and radially, by means of balls 59 and 61. The apertures 47,49 of the hub sleeve 3 are provided with shoulders facing axially away from one another which determine the axial interval of the outer bearing race rings 55, 57. The axial interval of the inner bearing race rings 63,65 is determined by a distance tube 67 which in turn is guided radially in a portion 69 of reduced diameter of the hub sleeve 3.
On the side axially remote from the distance tube 67 the inner bearing race ring 65 rests against the facing end face of the spindle part 17. Between the inner bearing race ring 63 and the part of the rear fork 15 adjacent to the eccentric tightening device 37 a distance ring 71 is fitted on to the spindle part 23.
The eccentric tightening device 37 thus tightens this part of the rear fork 15 through the distance ring 71, the inner bearing race ring 63, the distance tube 67 and the inner bearing race ring 65 against the spindle part 17 secured to the other part of the rear fork 15.
The pawl freewheel 13 comprises pawls 73 which are mounted at their radially outer end for pivoting about a rotation axis parallel to the hub spindle 1 in a bearing race ring 75 which coaxially encloses the drive member 5. The bearing ring 75 is held fast in a recess 77 of the hub sleeve 3 which axially adjoins the groove-type ball bearing 53. The pawls 73 engage with their radially inner ends in axial grooves 79 arranged in distribution on the external circumference of the drive member 5, forming a pawl toothing of the paw freewheel 13. Springs (not shown further) initially stress the pawls 73 radially inwards into the grooves 79. The grooves 79 extend over the entire axial length of the drive member 5 and serve at the same time for the rotation-fast securing of the chain wheels 11.
The outer bearing ring 57 of the groove-type ball bearing 53 axially adjacent to the drive member 5 extends out of the aperture 49 into the aperture 77.
The external diameter of the outer ring 57 is made slightly smaller than the clear internal diameter of the radially inwardly placed ends of the pawls 73 situated in the position of engagement with the grooves 79. The radially inwardly placed ends of the pawls 73 in the assembled condition ofthefree- wheel hub as illustrated are thus not in contact with the outer ring 57. When the hub sleeve 3 is separated from the drive member 5 the external circumference of the outer bearing race ring 57 protruding into the pivot path of the pawls 73 forms a stop 81 which holes the pawls 73 in a position approximately corresponding to the position which the pawls 73 assume by reason of their engagement in the grooves 79 when the freewheel hub is assembled.
Thus the hub body3 can be pushed on to the drive memberS.
For the removal of the hub body 3 the tightening lever 45 is pivoted out of the position as illustrated in the Figure, whereby the hub spindle 1 is slackened.
The spindle part 23 is unscrewed from the spindle part 17 and withdrawn axially. After removal of the distance ring 71 the hub sleeve 3 is withdrawn axially from the drive member 5 and can be taken out of the rear fork 15. It is not necessary to release the fastening of the drive memberS. The assembly of the freewheel hub takes place in the converse sequence. If necessary the radially inner corners of the pawls 73 facing the drive member 5 and/or the radially outer edge of the drive member 5 facing the pawls 73 can be provided with bevels to facilitate the commencement of the fitting of the pawls 73 on to the drive member 5.
Claims (7)
1. Freewheel hub for a cycle, comprising
a) a hub spindle (1) having two spindle parts (17, 23) axially disengageably coupled with one another, of which a first part (17) is individually securable to the cycle (1 5), b) a drive member (5) mounted rotatably on the first spindle part (17) and carrying at least one chain wheel (11),
c) a hub sleeve (3) mounted rotatably on the second (23) of the two spindle parts with two spoke flanges (7, 9) arranged with axial spacing from one another,
d) a ball bearing (51, 53) in the region of each spoke flange (7, 9) for the mounting of the hub sleeve 13) on the second spindle part (23),
e) afreewheelcoupling (13) arranged in the torque transmission path between drive member (5) and hub sleeve (3), comprising a pawl toothing (79) and at least one pawl (73) engaging under resilient initial stress in the pawl toothing (79), characterised in that each pawl (73) of the freewheel coupling (13) is pivotably mounted on the hub sleeve (3) about a rotation axis parallel with the hub spindle (1) and the pawl toothing (79) is provided on the drive member (5), and in that on the hub sleeve (3) at least one stop (81) is provided which limits the pivoting movement of the pawl (73), directed towards the drive member (5), in a position substantially conforming with its position of engagement.
2. Freewheel hub according to Claim 1, characterised in that each of the two ball bearings (51,53) comprises an outer bearing race ring (55, 57) held in the hub sleeve (3) and an inner bearing race ring (63, 65) held by means of its balls (59,61) on the outer bearing race ring (55,57), and in that the second spindle part (23) can be inserted freely into the ball bearings (51, 53) from the side axially opposite to the drive member (5).
3. Freewheel hub according to Claim 2, characterised in that the stop (81) limiting the pivoting movement of the pawl (73) is formed by the outer bearing race ring (57) of the ball bearing (53) axially adjacent to the drive member (5).
4. Freewheel hub according to Claim 2, characterised in that axially between the inner bearing race rings (63,65) of the two ball bearings there is arranged a separate distance tube (67) which is fixed radially in the hub sleeve (3).
5. Freewheel hub according to Claim 2, characterised in that on the side of the hub sleeve (3) axially remote from the drive member (5) a separate distance ring (71) is fitted on to the second spindle part (23) and abuts on the inner bearing race ring (63) of the ball bearing (51) provided on this side.
6. Freewheel hub according to Claim 1, characterised in that the drive member (5) has grooves (79) extending axially over its entire length which both form the pawl toothing and constitute the rotationfast connection of the chain wheel (11) with the drive member (5).
7. Freewheel hyb for a cycle substantially as herein described with reference to the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19828226103U DE8226103U1 (en) | 1982-09-16 | 1982-09-16 | FREE HUB FOR BICYCLES OD. DGL. |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8324444D0 GB8324444D0 (en) | 1983-10-12 |
| GB2127113A true GB2127113A (en) | 1984-04-04 |
| GB2127113B GB2127113B (en) | 1985-10-16 |
Family
ID=6743726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08324444A Expired GB2127113B (en) | 1982-09-16 | 1983-09-13 | Freewheel hub for a cycle |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS5973302A (en) |
| AT (1) | ATA318083A (en) |
| DE (1) | DE8226103U1 (en) |
| FR (1) | FR2533283B1 (en) |
| GB (1) | GB2127113B (en) |
| IT (1) | IT1193432B (en) |
| NO (1) | NO833322L (en) |
| SE (1) | SE456032B (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2618101A1 (en) * | 1987-07-17 | 1989-01-20 | Gepiroues | HUB FOR THE SAME FRONT AND REAR WHEEL CYCLE |
| EP0524709A2 (en) * | 1987-12-31 | 1993-01-27 | Hamlin Transmission Corporation | Variable-ratio transmissions, separately and in bicycles |
| US5332294A (en) * | 1992-09-21 | 1994-07-26 | John Haeussinger | Bicycle hub freewheel assembly |
| US5460254A (en) * | 1994-02-09 | 1995-10-24 | Huang; Jung Y. | Freehub |
| FR2926247A1 (en) * | 2008-01-14 | 2009-07-17 | Corima Sa | Rear wheel hub for bicycle, has ball bearing forming elastic sliding pivot connection between rotational axle and cassette body via elastomer O-rings, and another ball bearing forming swivel connection between axle and cassette body |
| US7766143B1 (en) * | 2007-05-16 | 2010-08-03 | Chosen Co., Ltd. | Bicycle rear hub whose freewheel having smaller diameter and specification |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3331557A1 (en) * | 1983-09-01 | 1985-03-21 | Fichtel & Sachs Ag, 8720 Schweinfurt | DRIVE HUB WITH AXLE FOR BICYCLES OR THE LIKE |
| DE19743661A1 (en) | 1997-10-02 | 1999-04-08 | Sram De Gmbh | Hub for a bike |
| WO2000034056A1 (en) * | 1998-12-08 | 2000-06-15 | Dt Swiss Ag | Hub, notably for bicycles and such like |
| DE19856627A1 (en) * | 1998-12-08 | 2000-06-15 | Dt Swiss Ag Biel | Freewheel hub |
| CN104827819B (en) * | 2015-05-19 | 2017-07-28 | 天津市兴轮生产力促进有限公司 | It is conveniently replaceable the bicycle pattern drum coating of spoke |
| ES2927290T3 (en) * | 2017-08-29 | 2022-11-03 | Fazua Gmbh | Hub drive unit for a vehicle wheel hub, wheel hub and vehicle with auxiliary drive |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR997737A (en) * | 1948-11-01 | 1952-01-09 | Sturmey Archer Gears Ltd | Freewheel hub for cycles |
| DE1155355B (en) * | 1958-10-04 | 1963-10-03 | Luigi Magistroni | Rear wheel freewheel hub for bicycles |
| FR2415036A1 (en) * | 1978-01-23 | 1979-08-17 | Ledin Ets Aime | Freewheel and hub assembly for bicycle - has internal toothed gear engaged by pawls and several different dia. sprockets retained by outer sprocket which is screwed onto hub |
-
1982
- 1982-09-16 DE DE19828226103U patent/DE8226103U1/en not_active Expired
-
1983
- 1983-09-06 AT AT0318083A patent/ATA318083A/en not_active Application Discontinuation
- 1983-09-13 GB GB08324444A patent/GB2127113B/en not_active Expired
- 1983-09-14 SE SE8304940A patent/SE456032B/en not_active IP Right Cessation
- 1983-09-15 IT IT67959/83A patent/IT1193432B/en active
- 1983-09-15 FR FR8315029A patent/FR2533283B1/en not_active Expired
- 1983-09-15 NO NO833322A patent/NO833322L/en unknown
- 1983-09-16 JP JP58169540A patent/JPS5973302A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2618101A1 (en) * | 1987-07-17 | 1989-01-20 | Gepiroues | HUB FOR THE SAME FRONT AND REAR WHEEL CYCLE |
| WO1989000510A1 (en) | 1987-07-17 | 1989-01-26 | Societe Gepiroues S.A.R.L. | Hub for cycle with identical front and rear wheels |
| EP0524709A2 (en) * | 1987-12-31 | 1993-01-27 | Hamlin Transmission Corporation | Variable-ratio transmissions, separately and in bicycles |
| EP0524709A3 (en) * | 1987-12-31 | 1993-03-24 | Hamlin Transmission Corporation | Variable-ratio transmissions, separately and in bicycles |
| US5332294A (en) * | 1992-09-21 | 1994-07-26 | John Haeussinger | Bicycle hub freewheel assembly |
| US5460254A (en) * | 1994-02-09 | 1995-10-24 | Huang; Jung Y. | Freehub |
| US7766143B1 (en) * | 2007-05-16 | 2010-08-03 | Chosen Co., Ltd. | Bicycle rear hub whose freewheel having smaller diameter and specification |
| FR2926247A1 (en) * | 2008-01-14 | 2009-07-17 | Corima Sa | Rear wheel hub for bicycle, has ball bearing forming elastic sliding pivot connection between rotational axle and cassette body via elastomer O-rings, and another ball bearing forming swivel connection between axle and cassette body |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2533283B1 (en) | 1986-12-26 |
| JPS5973302A (en) | 1984-04-25 |
| DE8226103U1 (en) | 1982-12-30 |
| GB2127113B (en) | 1985-10-16 |
| NO833322L (en) | 1984-03-19 |
| SE8304940L (en) | 1984-03-17 |
| SE8304940D0 (en) | 1983-09-14 |
| SE456032B (en) | 1988-08-29 |
| GB8324444D0 (en) | 1983-10-12 |
| IT1193432B (en) | 1988-06-22 |
| ATA318083A (en) | 1988-09-15 |
| FR2533283A1 (en) | 1984-03-23 |
| IT8367959A0 (en) | 1983-09-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |