US20130085043A1 - Bicycle bottom bracket - Google Patents
Bicycle bottom bracket Download PDFInfo
- Publication number
- US20130085043A1 US20130085043A1 US13/251,277 US201113251277A US2013085043A1 US 20130085043 A1 US20130085043 A1 US 20130085043A1 US 201113251277 A US201113251277 A US 201113251277A US 2013085043 A1 US2013085043 A1 US 2013085043A1
- Authority
- US
- United States
- Prior art keywords
- compression collar
- compression
- spindle
- bifurcation
- aperture
- 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.)
- Abandoned
Links
Images
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
- 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
- B62M3/003—Combination of crank axles and bearings housed in the bottom bracket
-
- 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
- B62K19/00—Cycle frames
- B62K19/30—Frame parts shaped to receive other cycle parts or accessories
- B62K19/34—Bottom brackets
Definitions
- the invention relates to bicycle parts and more particularly to a bicycle bottom bracket with improved characteristics.
- a bicycle crank comprises one hole at one end for connecting to a pedal and the other hole at the other end for connecting to an axle of bottom bracket.
- the other hole includes ridges and grooves on an inner surface.
- Either end of the axle includes ridges and grooves on an outer surface so that the axle may be co-rotated with the rotating crank.
- the ridges of the crank may impact ridges of the axle when a rider starts to rotate the crank.
- this not only makes noise when riding but also causes wear between the ridges.
- the larger the gaps the sooner the crank disengages from the axle.
- the need for improvement still exists.
- a bicycle bottom bracket comprising a spindle rotatably disposed through a bottom bracket shell; two pedal cranks each including a bifurcation at one end and a through hole formed through one arm of the bifurcation; and two compression collars each including a lengthwise slit, two opposite yoke arms each projecting out of the compression collar, a through aperture formed through the open end of one yoke arm, and a threaded hole formed through the open end of the other yoke arm, wherein the through aperture is aligned with the threaded hole; wherein each of the compression collars is complimentarily engaged with the bifurcation; wherein either end the spindle is matingly inserted into the compression collar; wherein two fasteners each are driven into either end of the spindle to fasten the compression collar and the spindle together; and wherein two pinch bolts each are driven through the through hole and the through aperture into the threaded hole to fasten the pedal crank and the compression collar together
- FIG. 1 is an exploded view of a pedal crank and a compression collar of a bicycle bottom bracket according to the invention
- FIG. 2 is a perspective view of the assembled pedal crank and compression collar of FIG. 1 ;
- FIG. 3 is a perspective view of the compression collar
- FIG. 4 is a side elevation of the compression collar shown in FIG. 3 ;
- FIG. 5 is a sectional view taken along line 5 - 5 of FIG. 4 ;
- FIG. 6 is an exploded view of the assembled pedal crank, compression collar, and a pedal to be mounted on a spindle which is rotatably disposed through a bottom bracket shell of a bicycle;
- FIG. 7 is a perspective view of the assembled bottom bracket shown in FIG. 6 ;
- FIG. 8 is a sectional view taken along line 8 - 8 of FIG. 7 .
- the bottom bracket is part of drive of a bicycle 1 .
- the bottom bracket comprises the following components as discussed in detail below.
- a spindle 12 is rotatably disposed through a bottom bracket shell 11 with both splined ends exposed.
- Two pedal cranks 2 each are an elongated hollow member having one holed end attached to a pedal (not numbered) and the other bifurcated end 20 .
- a through hole 21 is formed through one arm of the other bifurcated end 20 .
- Two compression collars 3 each are shaped as a split cylinder and comprise a lengthwise slit 31 , a through opening 32 being partially splined on its inner surface, and two opposite yoke arms 33 each having one end integrally formed with the main body of the compression collar 3 and the other open end projecting out of the main body of the compression collar 3 a short distance.
- two gaps 333 are formed between top of the yoke arm 33 and the main body of the compression collar 3 and between bottom of the yoke arm 33 and the main body of the compression collar 3 respectively.
- a through aperture 331 is formed through the open end of one yoke arm 33 and a threaded hole 332 is formed through the open end of the other yoke arm 33 .
- the through aperture 331 is aligned with the threaded hole 332 .
- the compression collar 3 is sized and shaped to the other bifurcated end 20 so that in assembly the compression collar 3 may be complimentarily engaged with the other bifurcated end 20 with the through aperture 331 , the threaded hole 332 , and the through hole 21 being aligned.
- drive two screws 5 each into internal threads (not shown) formed in one splined end of the spindle 12 to fasten the compression collar 3 and the spindle 12 together.
- drive two pinch bolts 4 each through the through hole 21 and the through aperture 331 into the threaded hole 332 to fasten the pedal crank 2 and the compression collar 3 together.
- the invention has a decreased number of components, is easy to assemble or detach, and is durable.
Abstract
A crankset is provided with a spindle rotatably disposed through a bottom bracket shell; two pedal cranks each including a bifurcation at one end and a through hole formed through one arm of the bifurcation; and two compression collars each including a lengthwise slit, two yoke arms each projecting out of the compression collar, a through aperture through one end of one yoke arm, and a threaded hole through one end of the other yoke arm. The through aperture is aligned with the threaded hole. Each compression collar is complimentarily engaged with the bifurcation. Either end of the spindle anchored in the compression collar. Either fastener is driven into either end of the spindle to fasten the compression collar and the spindle together. Either bolt is driven through the through hole and the through aperture into the threaded hole to fasten the pedal crank and the compression collar together.
Description
- 1. Field of the Invention
- The invention relates to bicycle parts and more particularly to a bicycle bottom bracket with improved characteristics.
- 2. Description of Related Art
- Conventionally, a bicycle crank comprises one hole at one end for connecting to a pedal and the other hole at the other end for connecting to an axle of bottom bracket. The other hole includes ridges and grooves on an inner surface. Either end of the axle includes ridges and grooves on an outer surface so that the axle may be co-rotated with the rotating crank. There are gaps between the ridges of the crank and the axle. Thus, the ridges of the crank may impact ridges of the axle when a rider starts to rotate the crank. Disadvantageously, this not only makes noise when riding but also causes wear between the ridges. The larger the gaps the sooner the crank disengages from the axle. Thus, the need for improvement still exists.
- It is therefore one object of the invention to provide a bicycle bottom bracket comprising a spindle rotatably disposed through a bottom bracket shell; two pedal cranks each including a bifurcation at one end and a through hole formed through one arm of the bifurcation; and two compression collars each including a lengthwise slit, two opposite yoke arms each projecting out of the compression collar, a through aperture formed through the open end of one yoke arm, and a threaded hole formed through the open end of the other yoke arm, wherein the through aperture is aligned with the threaded hole; wherein each of the compression collars is complimentarily engaged with the bifurcation; wherein either end the spindle is matingly inserted into the compression collar; wherein two fasteners each are driven into either end of the spindle to fasten the compression collar and the spindle together; and wherein two pinch bolts each are driven through the through hole and the through aperture into the threaded hole to fasten the pedal crank and the compression collar together.
- The above and other objects, features and advantages of the invention will become apparent from the following detailed description taken with the accompanying drawings.
-
FIG. 1 is an exploded view of a pedal crank and a compression collar of a bicycle bottom bracket according to the invention; -
FIG. 2 is a perspective view of the assembled pedal crank and compression collar ofFIG. 1 ; -
FIG. 3 is a perspective view of the compression collar; -
FIG. 4 is a side elevation of the compression collar shown inFIG. 3 ; -
FIG. 5 is a sectional view taken along line 5-5 ofFIG. 4 ; -
FIG. 6 is an exploded view of the assembled pedal crank, compression collar, and a pedal to be mounted on a spindle which is rotatably disposed through a bottom bracket shell of a bicycle; -
FIG. 7 is a perspective view of the assembled bottom bracket shown inFIG. 6 ; and -
FIG. 8 is a sectional view taken along line 8-8 ofFIG. 7 . - Referring to
FIGS. 1 to 8 , a bottom bracket in accordance with the invention is shown. The bottom bracket is part of drive of a bicycle 1. The bottom bracket comprises the following components as discussed in detail below. - A
spindle 12 is rotatably disposed through abottom bracket shell 11 with both splined ends exposed. Twopedal cranks 2 each are an elongated hollow member having one holed end attached to a pedal (not numbered) and the other bifurcatedend 20. A throughhole 21 is formed through one arm of the other bifurcatedend 20. - Two
compression collars 3 each are shaped as a split cylinder and comprise alengthwise slit 31, a through opening 32 being partially splined on its inner surface, and twoopposite yoke arms 33 each having one end integrally formed with the main body of thecompression collar 3 and the other open end projecting out of the main body of the compression collar 3 a short distance. As shown inFIG. 4 , twogaps 333 are formed between top of theyoke arm 33 and the main body of thecompression collar 3 and between bottom of theyoke arm 33 and the main body of thecompression collar 3 respectively. A throughaperture 331 is formed through the open end of oneyoke arm 33 and a threadedhole 332 is formed through the open end of theother yoke arm 33. Thethrough aperture 331 is aligned with the threadedhole 332. - The
compression collar 3 is sized and shaped to the other bifurcatedend 20 so that in assembly thecompression collar 3 may be complimentarily engaged with the other bifurcatedend 20 with thethrough aperture 331, the threadedhole 332, and the throughhole 21 being aligned. Next, insert one end of thespindle 12 into the through opening 32 of thecompression collar 3 so as to matingly engage thespindle 12 with thecompression collar 3. Next, drive twoscrews 5 each into internal threads (not shown) formed in one splined end of thespindle 12 to fasten thecompression collar 3 and thespindle 12 together. Finally, drive two pinch bolts 4 each through the throughhole 21 and the throughaperture 331 into the threadedhole 332 to fasten thepedal crank 2 and thecompression collar 3 together. - It is envisaged by the invention that the invention has a decreased number of components, is easy to assemble or detach, and is durable.
- While the invention has been described in terms of preferred embodiments, those skilled in the art will recognize that the invention can be practiced with modifications within the spirit and scope of the appended claims.
Claims (1)
1. A crankset comprising:
a spindle rotatably disposed through a bottom bracket shell;
two pedal cranks each including a bifurcation at one end and a through hole formed through one arm of the bifurcation; and
two compression collars each including a lengthwise slit, two opposite yoke arms each projecting out of the compression collar, a through aperture formed through one yoke arm, and a threaded hole formed through the other yoke arm, the threaded hole being aligned with the through aperture;
wherein each of the compression collars is complimentarily engaged with the bifurcation of the pedal crank;
wherein either end the spindle is releasably fastened in the compression collar; and
wherein two threaded fasteners each are driven through the through hole of the bifurcation and the through aperture of the compression collar into the threaded hole of the compression collar to fasten the pedal crank and the compression collar together.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/251,277 US20130085043A1 (en) | 2011-10-02 | 2011-10-02 | Bicycle bottom bracket |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/251,277 US20130085043A1 (en) | 2011-10-02 | 2011-10-02 | Bicycle bottom bracket |
Publications (1)
Publication Number | Publication Date |
---|---|
US20130085043A1 true US20130085043A1 (en) | 2013-04-04 |
Family
ID=47993145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/251,277 Abandoned US20130085043A1 (en) | 2011-10-02 | 2011-10-02 | Bicycle bottom bracket |
Country Status (1)
Country | Link |
---|---|
US (1) | US20130085043A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4728218A (en) * | 1986-05-07 | 1988-03-01 | Durham Roger O | Locking key mechanism |
US5010785A (en) * | 1990-06-11 | 1991-04-30 | Seattle Bike Supply | Crank arm for a bicylce |
US5193930A (en) * | 1992-06-24 | 1993-03-16 | Chi Yi C | Coupling for securing a handlebar stem of a bicycle |
US5426996A (en) * | 1994-02-10 | 1995-06-27 | Kalloy Industrial Company, Ltd. | Fixing device for securing a handlebar stem of a bicycle |
US6314834B1 (en) * | 1999-01-25 | 2001-11-13 | Truvativ International Co., Ltd. | Hollow crank arm |
US20110011201A1 (en) * | 2009-07-15 | 2011-01-20 | Yu-Sheng Kao | Bicycle Bottom Bracket Assembly That Is Assembled Closely and Tightly |
-
2011
- 2011-10-02 US US13/251,277 patent/US20130085043A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4728218A (en) * | 1986-05-07 | 1988-03-01 | Durham Roger O | Locking key mechanism |
US5010785A (en) * | 1990-06-11 | 1991-04-30 | Seattle Bike Supply | Crank arm for a bicylce |
US5193930A (en) * | 1992-06-24 | 1993-03-16 | Chi Yi C | Coupling for securing a handlebar stem of a bicycle |
US5426996A (en) * | 1994-02-10 | 1995-06-27 | Kalloy Industrial Company, Ltd. | Fixing device for securing a handlebar stem of a bicycle |
US6314834B1 (en) * | 1999-01-25 | 2001-11-13 | Truvativ International Co., Ltd. | Hollow crank arm |
US20110011201A1 (en) * | 2009-07-15 | 2011-01-20 | Yu-Sheng Kao | Bicycle Bottom Bracket Assembly That Is Assembled Closely and Tightly |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
TWI706891B (en) | Bicycle front sprocket assembly | |
US20120167709A1 (en) | Length adjustable bicycle crank | |
EP1612135A2 (en) | Bicycle chain wheel structure | |
US9016169B2 (en) | Bicycle sprocket | |
TWI738831B (en) | Bicycle crank arm | |
US20130133477A1 (en) | Bicycle crank axle assembly | |
TW200827197A (en) | Bicycle chain wheel with fastener covers | |
US6899402B2 (en) | Combination of crank and axle in bottom bracket | |
US9598137B2 (en) | Bicycle front fork assembly | |
US8578816B2 (en) | Connecting and adjusting structure for a crank assembly | |
US9388847B1 (en) | Bottom bracket for bicycles | |
US20050011304A1 (en) | Crank structure of bicycle | |
US20130087011A1 (en) | Bicycle crank arm | |
US20130085043A1 (en) | Bicycle bottom bracket | |
US11279433B2 (en) | Vehicular frame's coupler structure | |
EP2412620B1 (en) | Connecting and adjusting structure for crank assembly | |
US20140157949A1 (en) | Crankset for a bicycle | |
US10011320B2 (en) | Wheel hub with an axial-braking assembly | |
US9656721B2 (en) | Adjustable platform pedal for use with clipless pedal and method for adjustable platform pedal on clipless pedal | |
US20100229676A1 (en) | Quick release device | |
US10207769B1 (en) | Bicycle pedal | |
US20130098197A1 (en) | Crank Assembly for Acrobatic Bicycle | |
TWM428131U (en) | Chain wheel fastening structure for bicycle, and crank assembly body for bicycle containing same | |
EP1442973A2 (en) | Pedal crank for bicycles | |
CN203358794U (en) | Novel bicycle chain wheel structure |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |