EP4392313A1 - Tendeur de chaîne - Google Patents

Tendeur de chaîne

Info

Publication number
EP4392313A1
EP4392313A1 EP22768906.4A EP22768906A EP4392313A1 EP 4392313 A1 EP4392313 A1 EP 4392313A1 EP 22768906 A EP22768906 A EP 22768906A EP 4392313 A1 EP4392313 A1 EP 4392313A1
Authority
EP
European Patent Office
Prior art keywords
chain
bicycle
tensioner arm
chain tensioner
attached
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.)
Pending
Application number
EP22768906.4A
Other languages
German (de)
English (en)
Inventor
Chris HODGE
David Kelly
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.)
Brompton Bicycle Ltd
Original Assignee
Brompton Bicycle Ltd
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 Brompton Bicycle Ltd filed Critical Brompton Bicycle Ltd
Publication of EP4392313A1 publication Critical patent/EP4392313A1/fr
Pending 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
    • B62M9/12—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 the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • B62M9/121—Rear derailleurs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDECARS, FORECARS, OR THE LIKE
    • B62K15/00—Collapsible or foldable cycles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDECARS, FORECARS, OR THE LIKE
    • B62K15/00—Collapsible or foldable cycles
    • B62K15/006—Collapsible or foldable cycles the frame being foldable
    • 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
    • B62M9/12—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 the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • B62M9/121—Rear derailleurs
    • B62M9/125—Mounting the derailleur on the frame
    • 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
    • B62M9/12—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 the chain, belt, or the like being laterally shiftable, e.g. using a rear derailleur
    • B62M9/121—Rear derailleurs
    • B62M9/126—Chain guides; Mounting thereof
    • 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

Definitions

  • a conventional derailleur assembly has a guide pulley, an idler pulley and a parallelogram linkage.
  • the guide pulley keeps the chain aligned with the sprocket as it is moved between sprockets when the gear is changed.
  • the idler pulley maintains the tension in the chain. When the chain is on the smallest sprocket, the idler pulley is required to take up more chain slack than when the chain is on the largest sprocket.
  • the wording ‘upright position’ is intended to mean the position the bicycle is in when it is ready to ride and located on a horizontal surface. This is shown in figure 1A, discussed further below.
  • the bicycle shown in figure 1C is in the upright position with the rear wheel in the folded state.
  • the horizontal plane is thus intended to mean a plane parallel with the surface on which the bicycle sits.
  • the lateral idler may also be called a jockey wheel.
  • the term ‘lateral idler’ is intended to mean a part which is able to interact with the chain and is able to rotate when the bicycle is in use and the chain is moving. The idler is able to move laterally (i.e. side to side along the axle) as the derailleur shifts the chain between sprockets.
  • the folding bicycle may comprise ten sprockets.
  • the bicycle has a large range of gears between which the derailleur assembly is able to be shifted.
  • additional gears can be added in a robust way.
  • the largest sprocket may have up to twenty teeth.
  • the folding bicycle may have more than 10 sprockets.
  • the largest sprocket may have 40 teeth.
  • Figures 1A to 1C show the rear wheel of the folding bicycle moving from an unfolded to a folded position.
  • Figures 2A and 2B show front and isometric views of the chain tensioner arm attached to the hanger according to a first aspect of the invention
  • Figures 5A and 5B show front and isometric views of the rear wheel of the bicycle according to the first aspect of the invention and show the position of the chain tensioner arm when the rear wheel of the bicycle is in an unfolded position (without the chain showing);
  • Figures 6A and 6B show front and isometric views of the rear wheel of the bicycle according to the first aspect of the invention and show the position of the chain tensioner arm when the rear wheel of the bicycle is in a folded position (without the chain showing);
  • Figures 10A and 10B show front and isometric views of the rear wheel of the bicycle according to the second aspect of the invention and show the position of the chain tensioner arm when the rear wheel of the bicycle is in a folded position (without the chain showing);
  • the folding bicycle of the present application is folded by pressing a release lever and lifting the frame of the bicycle to allow the rear wheel of the bicycle to swing underneath the frame of the bicycle into a folded position.
  • FIG. 1A shows a bicycle 1 in an unfolded position. In this position, the bicycle 1 is able to be ridden by a rider.
  • the bicycle 1 comprises a bicycle frame 2 and a chain 3, where the chain 3 is used to transfer power between a crank set 6 and a cassette 5 arranged about a hub 9 of a rear wheel 10 of the bicycle 1.
  • the cassette 5 comprises two or more sprockets 7.
  • a derailleur assembly 8 is attached to the bicycle frame 2. When the rider changes gear by operating a control (not labelled), the derailleur assembly 8 shifts the chain 3 from one sprocket to another.
  • a chain tensioner arm 4 takes up the slack in the chain as the chain moves from a larger to a smaller sprocket.
  • Figure 1C shows the rear wheel 10 of the bicycle in the folded position. In this position, the rear wheel has swung around the pivot point to sit fully under the bicycle frame 2.
  • the distance between the cassette 5 and the crank set 6 is smaller than when the rear wheel 10 is in the unfolded position.
  • the chain tensioner arm 4 has additional slack to take up in order to maintain the tension in the chain. It does this by pivoting to the angle shown in figure 1C. This will be discussed further later.
  • Figures 2A and 2B show front and isometric views of the chain tensioner arm 4 according to a first aspect of the present invention.
  • the chain tensioner arm 4 comprises a first end attached to a hanger 11.
  • the first end of the chain tensioner arm 4 is attached to the hanger 11 by means of a bolt 14 extending through a through-hole in the chain tensioner arm 4.
  • the chain tensioner arm 4 is rotatable with respect to the hanger 11.
  • the hanger 11 comprises a torsion spring (shown in figure 2C) which is held in pretension.
  • the torsion spring comprises one leg acting against the hanger 11 and the opposite leg acting against the chain tensioner arm within the through-hole. The legs are rotated away from each other when the chain tensioner arm is assembled on the chain (the chain tensioner arm is moved in the counter clockwise direction when viewing figure 2A).
  • the hanger 11 comprises a slot 12 and a through hole 13.
  • a bolt (not shown in this figure) runs through the hub of the rear wheel 10 and about which the rear wheel 10 and sprockets 7 are configured rotate when the chain moves.
  • Figures 5A and 5B show the rear wheel 10 of the bicycle 1 with the derailleur assembly 8 and chain tensioner arm 4 attached. These figures show the positioning of the chain tensioner arm 4 when the teeth 17 of the lateral idler 15 of the chain tensioner arm 4 are in contact with the chain 3 (not shown) and the rear wheel 10 is in the unfolded position. The chain tensioner arm 4 is thus in a loaded position. The interaction of the chain 3 with the chain tensioner arm 4 causes the chain tensioner arm 4 to rotate in a second direction with respect to the hanger 11 , opposite the first direction. The second direction is an anticlockwise direction when the chain tensioner arm 4 is viewed as in figure 5A.
  • the chain tensioner arm 4, hanger 11 and lateral idler largely correspond to that shown in figures 2A and 2B.
  • a guide pulley 29 is attached to the hanger 11 .
  • the guide pulley 29 is static in that it can rotate as the chain moves but does not move laterally.
  • the guide pulley 29 enables a consistent amount of contact between the chain and the sprocket on the wheel to be provided as the bicycle is folded and during use of the bike.

Landscapes

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

Abstract

Vélo pliant, le vélo pliant comprenant un cadre de vélo, une cassette comprenant au moins deux pignons et un ensemble dérailleur fixé au cadre de vélo. L'ensemble dérailleur comprend une poulie de guidage conçue pour interagir avec une chaîne, et un dérailleur en parallélogramme conçu pour déplacer la poulie de guidage et la chaîne entre lesdits deux pignons. Le vélo pliant comprend en outre un bras de tendeur de chaîne fixé au cadre de vélo. L'ensemble dérailleur et le bras de tendeur de chaîne sont fixés indépendamment au cadre de vélo.
EP22768906.4A 2021-08-23 2022-08-23 Tendeur de chaîne Pending EP4392313A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2112061.3A GB2610177B (en) 2021-08-23 2021-08-23 Chain tensioner
PCT/GB2022/052169 WO2023026037A1 (fr) 2021-08-23 2022-08-23 Tendeur de chaîne

Publications (1)

Publication Number Publication Date
EP4392313A1 true EP4392313A1 (fr) 2024-07-03

Family

ID=77913909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22768906.4A Pending EP4392313A1 (fr) 2021-08-23 2022-08-23 Tendeur de chaîne

Country Status (4)

Country Link
EP (1) EP4392313A1 (fr)
CN (1) CN117836200A (fr)
GB (1) GB2610177B (fr)
WO (1) WO2023026037A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20250235731A1 (en) * 2024-01-23 2025-07-24 Zwift, Inc. Quick connect chain tensioner for bicycles and bicycle trainers
TWI908613B (zh) * 2025-02-17 2025-12-11 銘穗精密工業有限公司 後叉導鏈器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2401589B (en) * 2003-05-16 2005-06-15 Atb Sales Ltd Folding bicycle
TWM396254U (en) * 2010-09-08 2011-01-11 guan-yi Li Anti-chain drop device of a foldable bicycle
TWI508895B (zh) * 2012-10-11 2015-11-21 Pacific Cycles Inc Bicycle chain bracing device
US20140357436A1 (en) * 2013-06-04 2014-12-04 Shimano Inc. Bicycle chain tensioner
CN209336930U (zh) * 2018-12-05 2019-09-03 珠海迪瑞乐科技有限公司 自行车拨链结构及自行车
CA3080960C (fr) * 2020-05-14 2023-10-31 Cedric EVELEIGH Transmission de bicyclette

Also Published As

Publication number Publication date
GB2610177B (en) 2024-04-24
GB2610177A (en) 2023-03-01
CN117836200A (zh) 2024-04-05
GB202112061D0 (en) 2021-10-06
WO2023026037A1 (fr) 2023-03-02

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