GB2243661A - Swing arm chain tensioner for bicycles - Google Patents

Swing arm chain tensioner for bicycles Download PDF

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Publication number
GB2243661A
GB2243661A GB9010141A GB9010141A GB2243661A GB 2243661 A GB2243661 A GB 2243661A GB 9010141 A GB9010141 A GB 9010141A GB 9010141 A GB9010141 A GB 9010141A GB 2243661 A GB2243661 A GB 2243661A
Authority
GB
United Kingdom
Prior art keywords
swing arm
chain
jockey
arm
wheels
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
Application number
GB9010141A
Other versions
GB2243661B (en
GB9010141D0 (en
Inventor
Paul Antony Fletcher
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
Priority to GB9010141A priority Critical patent/GB2243661B/en
Publication of GB9010141D0 publication Critical patent/GB9010141D0/en
Publication of GB2243661A publication Critical patent/GB2243661A/en
Application granted granted Critical
Publication of GB2243661B publication Critical patent/GB2243661B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B62M9/16—Tensioning or adjusting equipment for chains, belts or the like

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

A bicycle chain tensioner comprises a swing arm 9 attached to the cycle chain stay 1 via a fixing bracket 2 the arm 9 carrying a jockey wheel assembly 3 which is allowed side ways movement to maintain chain alignment when changing from one chain wheel 7 to another. The jockey wheels 3 are adjustably mounted and the swing arm assembly is spring biassed about pivot spring 6. Side shields provided with holes are attached to the jockey wheels to guide the chain. <IMAGE>

Description

nImprovements relating to wheel drive mechanisms" The object of this Swing Arm invention is to increase the range of gears sath the use of a hub gear by means to use a enclosed rear hub gear wheel with a single sprocket and two or more various size front chain wheels complete with standard front derailleur lever and shifter, or by any other means of moving the drive chain to any of the respective chain wheels this will give a minimum chain crossover with say two or three chain rings allowing maximum gears to be used, ie, five speed hub triple chain wheels = fifteen true usable gears,to achieve this it requires a unit to take up chain slackness and retain tension of the chain whilst moving on different size chain wheels automatically ie, without the use of cables or levers, By the working feasibility accordingly this invention provides the following details.
FIGURE 1 is view from inside the frame chain stay FIGURE 2 is the side view of Swing Arm assembly FIGURE 3 shows cut away section of jockey wheel assembly and extended bush FIGURE 4 is viewed from outside the frame chain stay FIGURE 5 relates to chain stays taper on cycles Fig 1 Illustrates the working principle of the Swing Arm assembly showing the fixing bracket 2 attached to the chain stay 1, X shows the chain route through the ajustable jockey sprocket assembly 3, when the chain is moved from chain rings of different sizes 7 the arm will swing to left or right depending on size selected to ensure the arm maintains tension on the chain constantly, a pivot spring 6 is fitted to the pivot housing 4 and arm 9 this allows the arm to maintain tension against chain rings 7.
Fig 2 Shows fixing brackets 2 pivot housing 4 pivot bolt 5 pivot spring 6 one end is attached to pivot housing 4 the other end to the Swing Ari 9 this is held by retaining cap and nut 1D, two bolts retaining jockey wheel assembly 3o Fig 3 Jockey wheel assembly 3 comprising of hollow bush 17 two off side shields 11 and jockey sprocket 12, they are all firmly attached together to rotate as one unit, extended bushes 16 to allow end float on jockey wheel assembly to ensure chain alignment when moving from one chain ring to another Fig 4 The arm has two slots 15 to allow jockey wheel assembly 3 to be ajustable for extra or less chain tension, the side shields 11 have several holes 13 around the face to assist spinning out of dirt water etc from inside of jockey wheel assembly 3 Fig 5 Shows from chain rings 7 chain stay 1 tapers outwards to the rear hub sprocket 8, it will be noted that the chain has to run in a reasonably straight line ref fixing bracket 2 to enable the Swing Arm 9 and jockey wheel assembly 3 to run in line with the chain route, to achieve this the fixing bracket 2 will be offset or twisted to required angle ref XX on figure 4, in some caseSthis may not be necessary, ie if it is used on parallel chain stays.
continued Figure 6 is a view of assembled Swing Arm Fig 6 is a general view of the assembled Swing Arm from the out side of the chain stay, it can be seen the fixing bracket 2 is approx right angles to the normal position when Swing Arm is sprung loaded, prior to fitting to chain stay and chain.

Claims (7)

  1. t A Swing Arm tension mechanism to operate automatically ie, without manual cable or levers in conjunction with two or more chain rings for hub gears comprising of a arm with one end fitted in to a housing to allow a swing movement, attached to the arm is two jockey tension wheels and side shields. The complete assembly is mounted to the cycle chain stay by means of a detachable bracket0
  2. 2 A swing arm as claimed in 1 wherein a tension spring is provided on the arm housing to employ tension to the chain via the jockey wheel assembly.
  3. 3 A Swing Arm as claimed in claim 1 or 2 has side shields attached to the jockey wheels to guide chain,
  4. 4 A Swing Arm as claimed in claim 3 has holes around the side shields to eliminate water and dirt etc from inside jockey wheel assembly0
  5. 5 A Swing Arm as claimed in any proceeding claim wherein the jockey wheels are mounted on extended bushes that allow them to slide side ways in order to control chain alignment,
  6. 6 A Swing Arm as claimed in claim 1 has slotted holes to allow jockey wheels to be ajusted as required,
  7. 7 A Swing Arm as claimed in claim 1 has a detachable bracket by this means the Swing Arm can be ajusted along the chain stay as required, A Swing Arm tensioner substantially as herein descibed with reference to the accompanying drawings reference to figures 1 -6o
GB9010141A 1990-05-04 1990-05-04 Swing arm chain tensioner for cycles Expired - Fee Related GB2243661B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9010141A GB2243661B (en) 1990-05-04 1990-05-04 Swing arm chain tensioner for cycles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9010141A GB2243661B (en) 1990-05-04 1990-05-04 Swing arm chain tensioner for cycles

Publications (3)

Publication Number Publication Date
GB9010141D0 GB9010141D0 (en) 1990-06-27
GB2243661A true GB2243661A (en) 1991-11-06
GB2243661B GB2243661B (en) 1994-05-11

Family

ID=10675540

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9010141A Expired - Fee Related GB2243661B (en) 1990-05-04 1990-05-04 Swing arm chain tensioner for cycles

Country Status (1)

Country Link
GB (1) GB2243661B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2373305A (en) * 2001-02-06 2002-09-18 Satake Eng Co Ltd Idle pulley belt tensioner for a flexible drive transmission system
WO2005021369A1 (en) * 2003-08-28 2005-03-10 Massimo Cesarato Chain-tensioner for bicycles
EP1564128A3 (en) * 2004-02-10 2005-09-21 HONDA MOTOR CO., Ltd. Chain tension structure
GB2412710A (en) * 2004-03-30 2005-10-05 Ford Global Tech Llc Belt tensioning pulley tiltable w.r.t. belt run plane
EP2230168A1 (en) * 2009-03-16 2010-09-22 Jochen Klieber Device for guiding a chain

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB543087A (en) * 1939-05-27 1942-02-10 Doran Brothers Inc Improvements in belt or chain driving mechanism
GB782206A (en) * 1955-03-08 1957-09-04 George Meagher Improvements in or relating to intermittent gearing
GB1084464A (en) * 1964-05-29 1967-09-20 Nat Res Dev Improvements in apparatus for the separation of granular materials
GB1228283A (en) * 1968-11-04 1971-04-15
US3817113A (en) * 1971-01-18 1974-06-18 Sulzer Ag Chain drive with idler wheel tensioning means biased by elongated pads
US4678454A (en) * 1984-12-19 1987-07-07 Sears, Roebuck & Co. Inertia controlled loading system
US4787879A (en) * 1987-11-02 1988-11-29 Exeter Granddiorite Trust Fifteen speed variable radius bicycle transmission

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB543087A (en) * 1939-05-27 1942-02-10 Doran Brothers Inc Improvements in belt or chain driving mechanism
GB782206A (en) * 1955-03-08 1957-09-04 George Meagher Improvements in or relating to intermittent gearing
GB1084464A (en) * 1964-05-29 1967-09-20 Nat Res Dev Improvements in apparatus for the separation of granular materials
GB1228283A (en) * 1968-11-04 1971-04-15
US3817113A (en) * 1971-01-18 1974-06-18 Sulzer Ag Chain drive with idler wheel tensioning means biased by elongated pads
US4678454A (en) * 1984-12-19 1987-07-07 Sears, Roebuck & Co. Inertia controlled loading system
US4787879A (en) * 1987-11-02 1988-11-29 Exeter Granddiorite Trust Fifteen speed variable radius bicycle transmission

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2373305A (en) * 2001-02-06 2002-09-18 Satake Eng Co Ltd Idle pulley belt tensioner for a flexible drive transmission system
GB2373305B (en) * 2001-02-06 2004-12-01 Satake Eng Co Ltd A flexible drive transmission system
WO2005021369A1 (en) * 2003-08-28 2005-03-10 Massimo Cesarato Chain-tensioner for bicycles
EP1564128A3 (en) * 2004-02-10 2005-09-21 HONDA MOTOR CO., Ltd. Chain tension structure
US8371974B2 (en) 2004-02-10 2013-02-12 Honda Motor Co., Ltd. Chain tension structure
GB2412710A (en) * 2004-03-30 2005-10-05 Ford Global Tech Llc Belt tensioning pulley tiltable w.r.t. belt run plane
GB2412710B (en) * 2004-03-30 2007-08-01 Ford Global Tech Llc An engine belt drive system
EP2230168A1 (en) * 2009-03-16 2010-09-22 Jochen Klieber Device for guiding a chain

Also Published As

Publication number Publication date
GB2243661B (en) 1994-05-11
GB9010141D0 (en) 1990-06-27

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20030504