GB2477011A - Freewheel structure - Google Patents

Freewheel structure Download PDF

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Publication number
GB2477011A
GB2477011A GB1018059A GB201018059A GB2477011A GB 2477011 A GB2477011 A GB 2477011A GB 1018059 A GB1018059 A GB 1018059A GB 201018059 A GB201018059 A GB 201018059A GB 2477011 A GB2477011 A GB 2477011A
Authority
GB
United Kingdom
Prior art keywords
freewheel
position portion
hub
sprockets
adapting
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Withdrawn
Application number
GB1018059A
Other versions
GB201018059D0 (en
Inventor
Alves Filipe Luis Augusto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of GB201018059D0 publication Critical patent/GB201018059D0/en
Publication of GB2477011A publication Critical patent/GB2477011A/en
Withdrawn legal-status Critical Current

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
    • 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
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Transmission Devices (AREA)

Abstract

A freewheel structure comprises a freewheel 2. The freewheel 2 has a teethed portion 21 formed on an outer periphery thereof for adapting to engage with a bicycle chain. The freewheel 2 has a pivotal hole 22 centrally defined therein and extending therethrough for adapting to receive a spindle 3. The freewheel 2 has a position portion 23 disposed on an inner end of the pivotal hole 22 for adapting to connect with a bicycle hub 4. The position portion 23 of the freewheel 2 is single-directionally and ratchetably rotated relative to the hub.

Description

FREE WHEEL STRUCTURE
1. Field of the Invention
The present invention relates to a freewheel structure, and more particularly to an integrally molded freewheel structure.
2. Description of Related Art
A conventional freewheel assembly includes a freewheel ii, a spindle 12 mounted in the freewheel 11. A hub assembly 13 is movably mounted on the spindle 12. The hub assembly 13 has a hub 131 and a ratcheting sleeve 132 ratchetably received in the hub 131. The hub 131 is provided for connecting to a plurality of spokes (not shown). The ratcheting sleeve 132 is fixed on the freewheel 11. The hub 13 1 is single-directionally ratchetably rotated relative to the ratcheting sleeve 132. When a chain (not shown) drives the freewheel ii to be rotated in a forward direction, the freewheel ii is engaged with the hub assembly 13 to drive a bicycle wheel (not shown). When the chain drives the freewheel ii to be rotated in a reversal direction, the freewheel ii with the ratcheting sleeve 132 are ratchetably disengaged with the hub 131 such that the bicycle wheel is idle driven.
The conventional bicycle freewheel assembly has several defects as following described: 1. There are various tolerances between the spindle ii and the ratcheting sleeve 132, the hub 131 and the ratcheting sleeve 132, and the ratcheting sleeve 132 and the freewheel 11. Those tolerances effect the stability of the freewheel assembly such that the operating life of the freewheel assembly is decreased; 2. The conventional freewheel assembly is assembled with multiple elements. The structure of the conventional freewheel assembly is complex. It takes a lot of time and causes a difficult for assembling.
The main objective of the present invention is to provide an improved integrally molded freewheel.
To achieve the objective, a freewheel structure in accordance with the present invention comprises freewheel. The freewheel has a teethed portion formed on an outer periphery thereof for adapting to engage with a bicycle chain.
The teethed portion is composed of a serious sizes of sprockets. The serious sizes of sprockets are descendingly arranged such that the freewheel is formed to be a tapered shape. Each sprocket has a plurality of teeth formed on an outer periphery thereof for adapting to engage with the bicycle chain. The freewheel has a pivotal hole centrally defined therein and extending therethrough for adapting to receive a spindle. The freewheel has a position portion disposed on an inner end of the pivotal hole for adapting to connect with a bicycle hub. The position portion is laterally located a maximum sized sprocket of the serious sizes of sprockets. A bearing is mounted on an outer end of the pivotal hole for provided a stability. The position portion has a plurality of ratchet sheets mounted around the position portion provided for single-directionally ratchetably engaging with the hub. Each ratchet sheet having an elastic member mounted thereon for elastically abutting against a corresponding ratchet sheet for providing an elastic restoring force.
When the chain drives the freewheel to be rotated in a forward direction, the plurality of ratchet sheets of the freewheel are engaged with the hub to rotatably drive the hub. When the chain drives the freewheel to be rotated in a reversal direction, the plurality of ratchet sheets of the freewheel are ratchetably disengaged such that the hub is idle driven relative to the freewheel. j
The freewheel structure in accordance with the present invention provides the following advantages relative to the conventional freewheel assembly. The freewheel is directly mounted on the spindle and single-directionally engaged with the hub. The freewheel of the conventional freewheel assembly is connected with the spindle via the ratcheting sleeve.
Therefore, the freewheel structure in accordance with the present invention decreases tolerances between the structural elements and increases the operational stability such the operational lift is increased. The freewheel structure in accordance with the present invention lacks the ratchet sleeve of the conventional freewheel assembly such that the structure of the freewheel structure in accordance with the present invention is simple for promoting a assembling speed.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
In the drawings: Fig. 1 is an exploded perspective view of a freewheel structure in accordance with the present invention; Fig. 2 is a partial assembled perspective view of the freewheel structure in accordance with the present invention; Fig. 3 is a side plan view of a freewheel of the freewheel structure in accordance with the present invention in partial cross-section; and Fig. 4 is an exploded perspective view of a conventional freewheel
assembly in accordance with the prior art.
Referring to the drawings and initially to Figs. 1-3, a freewheel structure in accordance with the present invention comprises a freewheel (2). The freewheel (2) is integrally molded. The freewheel (2) has a teethed portion (21) formed on an outer periphery thereof for adapting to engage with a bicycle chain (not shown). The teethed portion (21) is composed of a serious sizes of sprockets (211) (not shown). The serious sizes of sprockets (211) are descendingly arranged such that the freewheel (2) is formed to be a tapered shape. Each sprocket (211) has a plurality of teeth (212) formed oii an outer periphery thereof for adapting to engage with the bicycle chain. The freewheel (2) has a pivotal l1ole (22) centrally defined therein and extending therethrough for adapting to receive a spindle (3). The freewheel (2) has a position portion (23) disposed on an inner end of the pivotal hole (22) for adapting to connect with a bicycle hub (4). The position portion (23) is laterally located a maximum sized sprocket of the serious sizes of sprockets (211). A bearing (221) is mounted on an outer end of the pivotal hole (22) for provided a stability. The position portion (23) has a plurality of ratchet sheets (23 1) mounted around the position portion (23) provided for single-directionally ratchetably engaging with the hub (4). Each ratchet sheet (23 1) having an elastic member (232) mounted thereon for elastically abutting against a corresponding ratchet sheet (231) for providing an elastic restoring force.
When the chain drives the freewheel (2) to be rotated in a forward direction, the plurality of ratchet sheets (23 1) of the freewheel (2) are engaged with the hub (4) to rotatably drive the hub (4). \Vhen the chain drives the freewheel (2) to be rotated in a reversal direction, the plurality of ratchet sheets (231) of the freewheel (2) are ratchetably disengaged such that the hub (4) is idle driven relative to the freewheel (2).
The freewheel structure in accordance with the present invention provides the following advantages relative to the conventional freewheel assembly.
The freewheel (2) is directly mounted on the spindle (3) and single-directionally engaged with the hub (4). The freewheel of the conventional freewheel assembly is connected with the spindle via the ratcheting sleeve.
Therefore, the freewheel structure in accordance with the present invention decreases tolerances between the structural elements and increases the operational stabifity such the operational 1111 is increased.
The freewheel structure in accordance with the present invention lacks the ratchet sleeve of the conventional freewheel assembly such that the structure of the freewheel structure in accordance with the present invention is simple for promoting an assembling speed.

Claims (6)

  1. Claim(s) 1. A freewheel structure comprising: a freewheel 2, the freewheel 2 having a teethed portion 21 formed on an outer periphery thereof for adapting to engage with a bicycle chain, the freewheel 2 having a pivotal hole 22 centrally defined therein and extending therethrough for adapting to receive a spindle 3, the freewheel 2 having a position portion 23 disposed on an inner end of the pivotal hole 22 for adapting to connect with a bicycle hub 4; wherein the position portion 23 of the freewheel 2 is single-directionally and ratchetably rotated relative to the hub 4.
  2. 2. The freewheel structure as claimed in claim 1, wherein the position portion 23 has a plurality of ratchet sheets 23 1 mounted around the position portion 23 provided for single-directionally ratchetably engaging with the hub 4, each ratchet sheet 23 1 having an elastic member 232 mounted thereon for elastically abutting against a corresponding ratchet sheet 231 for providing an elastic restoring force.
  3. 3. The freewheel structure as claimed in claim 1 further comprising a bearing 221 mounted on ai outer end of the pivotal hole 22 for provided a stability.
  4. 4. The freewheel structure as claimed in claim 1, wherein the teethed portion 21 is composed of a serious sizes of sprockets 211, the serious sizes of sprockets 211 descendingly arranged such that the freewheel 2 is formed to be a tapered shape, each sprocket 221 having a plurality of teeth 212 formed on an outer periphery thereof for adapting to engage with the chain.
  5. 5. The freewheel structure as claimed in claim 4, wherein the position portion 23 is laterally located a maximum sized sprocket 211 of the serious sizes of sprockets 211.
  6. 6. A freewheel structure substantially as hereinbefore described with reference to and as shown in Figures 1 to 3 of the accompanying drawings.Amendments to the claims have been filed as follows: Claims:- 1. A freewheel structure comprising: a freewheel 2, the freewheel 2 being integrally molded and having a teethed portion 21 formed on an outer periphery thereof for engagement with a bicycle chain, the teethed portion 21 being composed of a plurality of sizes of sprockets 211, the sprockets 211 being descendingly arranged so that the freewheel 2 is of a tapered shape, each sprocket 221 having a plurality of teeth 212 formed on an outer periphery thereof for engagement with the bicycle chain; the freewheel 2 having a pivotal hole 22 centrally formed therein and extending therethrough for receiving a spindle 3, the freewheel 2 having a position portion 23 disposed on an inner end of the pivotal hole 22 for connection with a bicycle hub 4, the position portion 23 being located adjacent a maximum sized sprocket 211 of the plurality of sprockets 211, the position portion 23 having a plurality of ratchet sheets 231 mounted around the position portion 23 provided for uni-directionally ratchetably engaging with the hub 4, each ratchet sheet 231 having an elastic member 232 mounted thereon for elastically abutting against a corresponding ratchet sheet 231 for providing an elastic restoring force; and a bearing 221 mounted on an outer end of the pivotal hole 22 for providing * * stability. S... S...2. A freewheel structure substantially as hereinbefore described with reference to and as shown in Figures 1 to 3 of the accompanying drawings.S....,
GB1018059A 2010-01-13 2010-10-26 Freewheel structure Withdrawn GB2477011A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW92200684 2010-01-13

Publications (2)

Publication Number Publication Date
GB201018059D0 GB201018059D0 (en) 2010-12-08
GB2477011A true GB2477011A (en) 2011-07-20

Family

ID=43365527

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1018059A Withdrawn GB2477011A (en) 2010-01-13 2010-10-26 Freewheel structure

Country Status (1)

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GB (1) GB2477011A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2656783A1 (en) * 2016-08-30 2018-02-28 Rotor Componentes Tecnológicos,S.L. SET OF BICYCLE SPROCKETS (Machine-translation by Google Translate, not legally binding)
EP3715238A4 (en) * 2017-11-22 2021-08-18 Hunan Sroad Technology Co., Ltd. Integrated flywheel sharing cylinders and preparation method therefor
FR3139504A1 (en) 2022-09-12 2024-03-15 Eurl Lagar Concept Integrated gear cassette for bicycle hubs

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4301903A (en) * 1979-02-08 1981-11-24 Takazi Nakano Wheel hub with a freewheel
EP0522983A1 (en) * 1991-07-09 1993-01-13 B.G. Innovation (S.A.R.L.) Bicycle hub with freewheel
DE202008005971U1 (en) * 2008-04-30 2008-07-10 Acros Sport Gmbh Integrated pinion for bicycle hubs
US20090255774A1 (en) * 2008-04-15 2009-10-15 Chia-Wei Hsu Ratchet gear device for a bicycle rear wheel

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4301903A (en) * 1979-02-08 1981-11-24 Takazi Nakano Wheel hub with a freewheel
EP0522983A1 (en) * 1991-07-09 1993-01-13 B.G. Innovation (S.A.R.L.) Bicycle hub with freewheel
US20090255774A1 (en) * 2008-04-15 2009-10-15 Chia-Wei Hsu Ratchet gear device for a bicycle rear wheel
DE202008005971U1 (en) * 2008-04-30 2008-07-10 Acros Sport Gmbh Integrated pinion for bicycle hubs

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"Eurobike 2010: Hope's New Cassette With Integrated Freehub - Bikeradar." Matthew Cole, 2nd September 2010 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2656783A1 (en) * 2016-08-30 2018-02-28 Rotor Componentes Tecnológicos,S.L. SET OF BICYCLE SPROCKETS (Machine-translation by Google Translate, not legally binding)
EP3715238A4 (en) * 2017-11-22 2021-08-18 Hunan Sroad Technology Co., Ltd. Integrated flywheel sharing cylinders and preparation method therefor
FR3139504A1 (en) 2022-09-12 2024-03-15 Eurl Lagar Concept Integrated gear cassette for bicycle hubs

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Publication number Publication date
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