GB2385837A - Quick-release bicycle pedal-crank arm assembly - Google Patents

Quick-release bicycle pedal-crank arm assembly Download PDF

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Publication number
GB2385837A
GB2385837A GB0204724A GB0204724A GB2385837A GB 2385837 A GB2385837 A GB 2385837A GB 0204724 A GB0204724 A GB 0204724A GB 0204724 A GB0204724 A GB 0204724A GB 2385837 A GB2385837 A GB 2385837A
Authority
GB
United Kingdom
Prior art keywords
crank arm
pedal
threaded sleeve
fixing threaded
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Withdrawn
Application number
GB0204724A
Other versions
GB0204724D0 (en
Inventor
Yung-Sung Lin
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.)
Shih Tsao Lin
Original Assignee
Shih Tsao Lin
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 Shih Tsao Lin filed Critical Shih Tsao Lin
Priority to GB0204724A priority Critical patent/GB2385837A/en
Publication of GB0204724D0 publication Critical patent/GB0204724D0/en
Publication of GB2385837A publication Critical patent/GB2385837A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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 SIDE-CARS, FORECARS, OR THE LIKE
    • B62K15/00—Collapsible or foldable cycles
    • 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
    • B62M3/00—Construction of cranks operated by hand or foot
    • 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
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/08—Pedals
    • 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 SIDE-CARS, FORECARS, OR THE LIKE
    • B62K15/00—Collapsible or foldable cycles
    • B62K2015/003—Collapsible or foldable cycles having a foldable crank or pedal

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

Abstract

The assembly has a standard screw-threaded pedal shaft end 31 in a corresponding screw-threaded bore 11 of a sleeve 10 which has two diametrically opposite end flanges 12. The sleeve 10 can pass through a bore 21 of the crank arm 20, two axial grooves in the bore accepting the flanges 12. Recesses 23 alongside the grooves accept the flanges upon rotation of the sleeve to lock the sleeve in the arm 20.

Description

<Desc/Clms Page number 1>
CRANK ARM QUICK RELEASE DEVICE OF BICYCLE The present invention relates to a crank arm quick release device of a bicycle, and more particularly to a crank arm quick release device of a bicycle, wherein the pedal may be mounted on and detached from the crank arm easily and quickly.
A conventional combination of a crank arm 20 and a pedal 30 in accordance with the prior art is shown in Fig. 5. The crank arm 20 has a free end formed with a screw bore 200. The pedal 30 has one end protruded with a rotation shaft 31 which has a free end formed with a screw portion 32 that may be extended through a washer 33, and may be screwed into the screw bore 200 of the crank arm 20. The crank arm 20 and the screw portion 32 of the rotation shaft 31 of the pedal 30 of the left side and the right side may form a reverse screw design which may prevent detachment of the pedal 30 when the pedal is stepped.
However, the crank arm 20 and the pedal 30 are combined by a reverse screw design. Thus, if the user rotates the pedal 30 in the opposite direction, the screw bore 200 of the crank arm 20 is easily worn out due to the wrong direction of rotation. In addition, the user has to screw the screw portion 32 of the rotation shaft 31 of the pedal 30 in the screw bore 200 of the crank arm 20, so that the assembly and disassembly thereof are inconvenient and slow.
The present invention has arisen to mitigate and/or obviate the disadvantage of the conventional combination of a crank arm and a pedal.
As will be appreciated from the invention described hereafter with reference to the drawings, the present invention provides a crank arm quick release device of a bicycle, wherein the pedal may be mounted on and detached from the crank arm easily and quickly.
As will further be appreciated from hereafter with reference to the drawings,
<Desc/Clms Page number 2>
the present invention provides a crank arm quick release device of a bicycle, which may be adapted to suit the pedal of a common bicycle, without having to make a new pedal, thereby saving cost of fabrication.
According to a first aspect of the present invention, there is provided a crank arm quick release device of a bicycle, comprising: a pedal, having one end protruded with a rotation shaft which has a free end formed with a screw portion having an outer thread; a fixing threaded sleeve, having a center formed with a screw bore that may be screwed on the screw portion of the rotation shaft of the pedal, the fixing threaded sleeve having an outer wall protruded with two radially opposite locking flanges ; and a crank arm, having a free end formed with a mounting hole for insertion of the fixing threaded sleeve, the mounting hole of the crank arm being recessed with two insertion guide grooves for insertion of the two locking flanges of the fixing threaded sleeve, each of the two insertion guide grooves having one side formed with a locking recess which has a depth slightly greater than the thickness of the locking flange, and is communicated with the insertion guide groove, the locking recess of each of the two insertion guide grooves being distributed on a diameter of the mounting hole.
Preferably, the crank arm quick release device of a bicycle according to the first aspect of the present invention is provided wherein the two locking flanges of the fixing threaded sleeve form an eccentric arrangement, and the opposite insertion guide grooves of the mounting hole of the crank arm form an opposite eccentric arrangement.
Very preferably, the crank arm quick release device of a bicycle according to the first aspect of the present invention is provided wherein the rotation shaft of the pedal is fitted with a washer.
At least one embodiment of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which :
<Desc/Clms Page number 3>
Fig. 1 is an exploded perspective view of a left sided crank arm quick release device of a bicycle in accordance with a preferred embodiment of the present invention; Fig. 2 is an exploded perspective view of a right sided crank arm quick release device of a bicycle in accordance with a preferred embodiment of the present invention; Fig. 3 is a plan assembly view of the crank arm quick release device of a bicycle in accordance with a preferred embodiment of the present invention; Fig. 4 is a cross-sectional assembly view of the crank arm quick release device of a bicycle in accordance with a preferred embodiment of the present invention.
zu Referring to the drawings and initially to Figs. 1-4, a crank arm quick release device of a bicycle in accordance with a preferred embodiment of the present invention comprises a fixing threaded sleeve 10, a crank arm 20, and a pedal 30. The pedal 30 may be a left sided pedal as shown in Fig. 1 or a right sided pedal as shown in Fig. 2.
The pedal 30 has one end protruded with a rotation shaft 31 which has a free end formed with a screw portion 32 having an outer thread.
The fixing threaded sleeve 10 has a center formed with a screw bore 11 that may be screwed on the screw portion 32 of the rotation shaft 31 of the pedal 30 as shown in Fig. 4. The fixing threaded sleeve 10 has an outer wall protruded with two radially opposite locking flanges 12.
The crank arm 20 has a free end formed with a mounting hole 21 for insertion of the fixing threaded sleeve 10. The mounting hole 21 of the crank arm 20 is recessed with two insertion guide grooves 22 for insertion of the two locking flanges 12 of the fixing threaded sleeve 10. Each of the two insertion guide grooves 22 has one side formed with a locking recess 23 which has a depth slightly greater than the thickness of the locking flange 12, and is
<Desc/Clms Page number 4>
communicated with the insertion guide groove 22. The locking recess 23 of each of the two insertion guide grooves 22 is distributed on a diameter of the mounting hole 21.
In assembly of the present invention, the fixing threaded sleeve 10 together with a washer 33 is initially screwed on the screw portion 32 of the rotation shaft 31 of the pedal 30. Then, the fixing threaded sleeve 10 is inserted into the mounting hole 21 of the crank arm 20, and each of the two locking flanges 12 of the fixing threaded sleeve 10 is inserted into the respective insertion guide groove 22 of the mounting hole 21 of the crank arm 20 to align with the position of the locking recess 23. Then, the rotation shaft 31 of the pedal 30 may be rotated by a wrench through about one quarter circle, whereby each of the two locking flanges 12 of the fixing threaded sleeve 10 may be rotated in the respective insertion guide groove 22 of the mounting hole 21 of the crank arm 20 to reach the position of the respective locking recess 23, so that each of the two locking flanges 12 of the fixing threaded sleeve 10 may be rested on the side of the respective locking recess 23 of the respective insertion guide groove 22 of the mounting hole 21 of the crank arm 20, thereby forming a positioning and locking effect.
At this time, the rotation shaft 31 of the pedal 30 may be further rotated through about one circle, so that the screw portion 32 of the rotation shaft 31 of the pedal 30 may be screwed toward the crank arm 20 as indicated by the arrow shown in Fig. 4, so that the rotation shaft 31 of the pedal 30 may be screwed and fixed in the crank arm 20, thereby achieving a quick screwing fixing effect.
In addition, in disassembly of the present invention, the rotation shaft 31 of the pedal 30 may be rotated reversely through about one and a quarter circle, whereby each of the two locking flanges 12 of the fixing threaded sleeve 10 may be rotated in the respective insertion guide groove 22 of the mounting hole 21 of the crank arm 20 to detach from the respective locking recess 23, so that the fixing threaded sleeve 10 may be detached from the mounting
<Desc/Clms Page number 5>
hole 21 of the crank arm 20. Thus, the pedal 30 may be detached from the crank arm 20 easily and quickly.
Referring to Fig. 3, the two locking flanges 12 of the fixing threaded sleeve 10 of a left sided pedal 30 as shown in Fig. 1 or a right sided pedal 30 as shown in Fig. 2 may form an eccentric arrangement of a different direction, and relatively, the opposite insertion guide grooves 22 of the mounting hole 21 of the crank arm 20 may also form an eccentric arrangement of a different direction, so that the fixing threaded sleeve 10 of a left sided pedal 30 as shown in Fig. 1 or a right sided pedal 30 as shown in Fig. 2 may be fitted into the mounting hole 21 of a left sided crank arm 20 as shown in Fig. 1 or a right sided crank arm 20 as shown in Fig. 2, thereby preventing erroneous assembly of the crank arm quick release device of a bicycle of the present invention.
In addition, the crank arm quick release device of a bicycle of the present invention may be adapted to suit the pedal 30 of a common bicycle, without having to make a new pedal, thereby saving cost of fabrication.
Although the invention has been explained in relation to its preferred embodiment as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.

Claims (4)

  1. Claims 1. A crank arm quick release device of a bicycle, comprising: a pedal, having one end protruded with a rotation shaft which has a free end formed with a screw portion having an outer thread; a fixing threaded sleeve, having a center formed with a screw bore that may be screwed on the screw portion of the rotation shaft of the pedal, the fixing threaded sleeve having an outer wall protruded with two radially opposite locking flanges ; and a crank arm, having a free end formed with a mounting hole for insertion of the fixing threaded sleeve, the mounting hole of the crank arm being recessed with two insertion guide grooves for insertion of the two locking flanges of the fixing threaded sleeve, each of the two insertion guide grooves having one side formed with a locking recess which has a depth slightly greater than the thickness of the locking flange, and is communicated with the insertion guide groove, the locking recess of each of the two insertion guide grooves being distributed on a diameter of the mounting hole.
  2. 2. The crank arm quick release device of a bicycle in accordance with claim 1, wherein the two locking flanges of the fixing threaded sleeve form an eccentric arrangement, and the opposite insertion guide grooves of the mounting hole of the crank arm form an opposite eccentric arrangement.
  3. 3. The crank arm quick release device of a bicycle in accordance with claim 1, wherein the rotation shaft of the pedal is fitted with a washer.
  4. 4. A crank arm quick release device of a bicycle substantially as hereinbefore described with reference to Figures 1 to 4 of the drawings.
GB0204724A 2002-02-28 2002-02-28 Quick-release bicycle pedal-crank arm assembly Withdrawn GB2385837A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0204724A GB2385837A (en) 2002-02-28 2002-02-28 Quick-release bicycle pedal-crank arm assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0204724A GB2385837A (en) 2002-02-28 2002-02-28 Quick-release bicycle pedal-crank arm assembly

Publications (2)

Publication Number Publication Date
GB0204724D0 GB0204724D0 (en) 2002-04-17
GB2385837A true GB2385837A (en) 2003-09-03

Family

ID=9931989

Family Applications (1)

Application Number Title Priority Date Filing Date
GB0204724A Withdrawn GB2385837A (en) 2002-02-28 2002-02-28 Quick-release bicycle pedal-crank arm assembly

Country Status (1)

Country Link
GB (1) GB2385837A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1759980A1 (en) * 2005-06-17 2007-03-07 Campagnolo Srl Insert for bicycle component and bicycle component incorporating such an insert
EP1840023A1 (en) * 2006-03-29 2007-10-03 Campagnolo Srl Bicycle pedal crank assembly and related elements
EP2228292A1 (en) * 2009-03-13 2010-09-15 Chung-I Chen Quick release device
ES2626588A1 (en) * 2016-01-25 2017-07-25 Tianjin Xufeng Sports Equipment Manufacture Co., Ltd. Easily assembled pedal structure (Machine-translation by Google Translate, not legally binding)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5315896A (en) * 1992-10-26 1994-05-31 Stringer Michael V Quick release bicycle pedal
US5440950A (en) * 1991-12-09 1995-08-15 Tranvoiz; Rene Device for quick mounting and removal of a shaft, such as a pedal shaft
US5586472A (en) * 1995-08-31 1996-12-24 Lin; Wen-Hwa Detachable bicycle pedal mounting structure

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5440950A (en) * 1991-12-09 1995-08-15 Tranvoiz; Rene Device for quick mounting and removal of a shaft, such as a pedal shaft
US5315896A (en) * 1992-10-26 1994-05-31 Stringer Michael V Quick release bicycle pedal
US5586472A (en) * 1995-08-31 1996-12-24 Lin; Wen-Hwa Detachable bicycle pedal mounting structure

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DE4342891A *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1759980A1 (en) * 2005-06-17 2007-03-07 Campagnolo Srl Insert for bicycle component and bicycle component incorporating such an insert
EP1840023A1 (en) * 2006-03-29 2007-10-03 Campagnolo Srl Bicycle pedal crank assembly and related elements
EP2228292A1 (en) * 2009-03-13 2010-09-15 Chung-I Chen Quick release device
ES2626588A1 (en) * 2016-01-25 2017-07-25 Tianjin Xufeng Sports Equipment Manufacture Co., Ltd. Easily assembled pedal structure (Machine-translation by Google Translate, not legally binding)

Also Published As

Publication number Publication date
GB0204724D0 (en) 2002-04-17

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)