Title of Invention	REAR HUB ASSEMBLY FOR BICYCLE
Abstract	The present invention provides a rear hub assembly for bicycle, comprises an axle (1), a hub shell (12), a shaft cup (5) and a shaft stop (3), wherein, at one side of the hub shell (12), a slidable ball stop (11) is installed between the shaft cup and a ball cup, and the flywheel mount (6) is mounted on the axle(1) by the slidable ball stop(11) and the ball cup located at its two sides. With this rear hub assembly, the axial clearance of the rear hub may be adjusted from either side of the rear hub conveniently, so as to be easy for assembling and repairing the bicycle, to significantly reduce the diameter and the teeth of the flywheel, and to improve the transmission ratio of the bicycle.

Title of Invention

REAR HUB ASSEMBLY FOR BICYCLE

Abstract

The present invention provides a rear hub assembly for bicycle, comprises an axle (1), a hub shell (12), a shaft cup (5) and a shaft stop (3), wherein, at one side of the hub shell (12), a slidable ball stop (11) is installed between the shaft cup and a ball cup, and the flywheel mount (6) is mounted on the axle(1) by the slidable ball stop(11) and the ball cup located at its two sides. With this rear hub assembly, the axial clearance of the rear hub may be adjusted from either side of the rear hub conveniently, so as to be easy for assembling and repairing the bicycle, to significantly reduce the diameter and the teeth of the flywheel, and to improve the transmission ratio of the bicycle.

Full Text	Technical Field The present invention relates to a device for adjusting and locking the axial clearance in the rear hub assembly of a bicycle, and to a device for connecting the flywheel with the hub assembly. Background of the Invention In the prior art, adjusting and locking the axial clearance in the rear hub assembly of a bicycle is by means of adjusting the gap between the two shaft stops each located at one of the two ends of the hub shell, where it is necessary to respectively adjust both of the left side and right side shaft stops and then lock each of the shaft stops by means of a locknut. Therefore, it is not convenient for operation. Moreover, as the flywheel plane axially overlaps with the revolving plane of the steel balls, the flywheel of the conventional bicycle has bigger diameter, more teeth and smaller transmission ratio. Summary of the Invention The present invention is aimed to provide a rear hub assembly for bicycle, which enables to adjust the axial clearance conveniently from either side of the rear hub, so as to be easy for assembling and repairing the bicycle, and to significantly reduce the diameter and the teeth of the flywheel. The rear hub assembly for bicycle according to this invention comprises an axle, a hub shell sleeved on said axle and a flywheel mount located at one end of said hub shell, wherein said hub shell has a locknut, an axle cup and steel balls at both of its two ends, and at the side where said flywheel mount is located, a slidable ball stop and a ball cup mounted on said axle are further provided, wherein said slidable ball stop is pressed against multiple steel balls in said axle cup, said flywheel mount is mounted on said axle between said slidable ball stop and said ball cup via steel balls at both of the two sides of said flywheel mount, and said ball stop is fixed by said locknut. According to the rear hub assembly for bicycle of this invention, since a slidable ball stop is installed between an axle cup and a ball stop at one said of the hub shell, when the gap at any end of the axles gets larger, the hub shell will move along the axle, i.e., the slidable ball stop will combine the gaps at the two ends of the axle, and the gap at one end will be transferred into the gap at the other end, therefore, the gap at both ends of the axle may be adjusted from either side of the hub shell. When adjusting the shaft stop at either end of the axle with the locknut at the other end fixed, the shaft cup, flywheel mount and the slidable ball stop are pressed in turn, so as to adjust the total axial clearance. At the same time, the flywheel mount is clearance fit with the axle, both ends of the flywheel are provided with a slidable or rolling bearing, the flywheel and the revolving plane of the steel balls are axially separated, thereby, the diameter and the teeth of the flywheel are reduced, and the transmission ratio of the bicycle is improved. Brief Description of the Drawings Fig. 1 is a cross-sectional view of a rear hub assembly for bicycle according to one embodiment of the present invention. Detailed description of the Preferred Embodiment Embodiment 1: As shown in Fig. 1, a hub shell 12 is sleeved on the axle 1, the hub shell 12 has a shaft cup 5 at both ends of the hub shell, a shaft stop 3 connected with the axle 1 via screw is pressed against multiple steel balls 4 in the shaft cup 5, a spacer 2 is mounted at the outer side of the shaft stop 3, and at the side of the hub shell where a flywheel is installed, a slidable ball stop 11 is installed between the shaft cup 5 and the ball cup 8. The flywheel mount 6 is mounted on the axle 1 between a slidable ball stop 11 and a ball cup 8 via steel balls 10,7 at both of its two sides. In order to improve the bearing capacity of the steel balls 10 at one side of the flywheel mount 6, a jack 9 is sleeved outside the flywheel mount 6, so as to enlarge the diameter and improve the bearing capacity of the steel balls 10. I Claim : 1. A rear hub assembly for bicycle, comprises an axle (1), a hub shell (12) sleeved on said axle (1), and a flywheel mount (6) located at one end of said hub shell (12), wherein said hub shell (12) has an axle cup (5) and steel balls (4) at both of its two ends, characterized in that, at the side where said flywheel mount (6) is located, a slidable ball stop (11) and a ball cup (8) mounted on said axle (1) are further provided, wherein said slidable ball stop (11) is pressed against multiple steel balls (4) in said axle cup (5), said flywheel mount (6) is mounted on said axle (1) between said slidable ball stop (11) and said ball cup (8) via steel balls at both of the two sides of said flywheel mount (6). 2. A rear hub assembly for bicycle as claimed in claim 1, wherein, a jacket (9) is sleeved outside the flywheel mount (6). The present invention provides a rear hub assembly for bicycle, comprises an axle (1), a hub shell (12), a shaft cup (5) and a shaft stop (3), wherein, at one side of the hub shell (12), a slidable ball stop (11) is installed between the shaft cup and a ball cup, and the flywheel mount (6) is mounted on the axle(1) by the slidable ball stop(11) and the ball cup located at its two sides. With this rear hub assembly, the axial clearance of the rear hub may be adjusted from either side of the rear hub conveniently, so as to be easy for assembling and repairing the bicycle, to significantly reduce the diameter and the teeth of the flywheel, and to improve the transmission ratio of the bicycle.

Full Text

Technical Field
The present invention relates to a device for adjusting and locking the axial clearance in
the rear hub assembly of a bicycle, and to a device for connecting the flywheel with the hub
assembly.
Background of the Invention
In the prior art, adjusting and locking the axial clearance in the rear hub assembly of a
bicycle is by means of adjusting the gap between the two shaft stops each located at one of the
two ends of the hub shell, where it is necessary to respectively adjust both of the left side and
right side shaft stops and then lock each of the shaft stops by means of a locknut. Therefore, it is
not convenient for operation. Moreover, as the flywheel plane axially overlaps with the
revolving plane of the steel balls, the flywheel of the conventional bicycle has bigger diameter,
more teeth and smaller transmission ratio.
Summary of the Invention
The present invention is aimed to provide a rear hub assembly for bicycle, which enables to
adjust the axial clearance conveniently from either side of the rear hub, so as to be easy for
assembling and repairing the bicycle, and to significantly reduce the diameter and the teeth of
the flywheel.
The rear hub assembly for bicycle according to this invention comprises an axle, a hub
shell sleeved on said axle and a flywheel mount located at one end of said hub shell, wherein
said hub shell has a locknut, an axle cup and steel balls at both of its two ends, and at the side
where said flywheel mount is located, a slidable ball stop and a ball cup mounted on said axle
are further provided, wherein said slidable ball stop is pressed against multiple steel balls in
said axle cup, said flywheel mount is mounted on said axle between said slidable ball stop and
said ball cup via steel balls at both of the two sides of said flywheel mount, and said ball stop is
fixed by said locknut.
According to the rear hub assembly for bicycle of this invention, since a slidable ball stop
is installed between an axle cup and a ball stop at one said of the hub shell, when the gap at any
end of the axles gets larger, the hub shell will move along the axle, i.e., the slidable ball stop will
combine the gaps at the two ends of the axle, and the gap at one end will be transferred into the
gap at the other end, therefore, the gap at both ends of the axle may be adjusted from either side
of the hub shell. When adjusting the shaft stop at either end of the axle with the locknut at the
other end fixed, the shaft cup, flywheel mount and the slidable ball stop are pressed in turn, so
as to adjust the total axial clearance. At the same time, the flywheel mount is clearance fit with
the axle, both ends of the flywheel are provided with a slidable or rolling bearing, the flywheel
and the revolving plane of the steel balls are axially separated, thereby, the diameter and the
teeth of the flywheel are reduced, and the transmission ratio of the bicycle is improved.
Brief Description of the Drawings
Fig. 1 is a cross-sectional view of a rear hub assembly for bicycle according to one
embodiment of the present invention.
Detailed description of the Preferred Embodiment
Embodiment 1:
As shown in Fig. 1, a hub shell 12 is sleeved on the axle 1, the hub shell 12 has a shaft cup
5 at both ends of the hub shell, a shaft stop 3 connected with the axle 1 via screw is pressed
against multiple steel balls 4 in the shaft cup 5, a spacer 2 is mounted at the outer side of the
shaft stop 3, and at the side of the hub shell where a flywheel is installed, a slidable ball stop 11
is installed between the shaft cup 5 and the ball cup 8. The flywheel mount 6 is mounted on the
axle 1 between a slidable ball stop 11 and a ball cup 8 via steel balls 10,7 at both of its two sides.
In order to improve the bearing capacity of the steel balls 10 at one side of the flywheel mount 6,
a jack 9 is sleeved outside the flywheel mount 6, so as to enlarge the diameter and improve the
bearing capacity of the steel balls 10.
I Claim :
1. A rear hub assembly for bicycle, comprises an axle (1), a hub shell (12)
sleeved on said axle (1), and a flywheel mount (6) located at one end of
said hub shell (12), wherein said hub shell (12) has an axle cup (5) and
steel balls (4) at both of its two ends, characterized in that, at the side
where said flywheel mount (6) is located, a slidable ball stop (11) and a
ball cup (8) mounted on said axle (1) are further provided, wherein said
slidable ball stop (11) is pressed against multiple steel balls (4) in said
axle cup (5), said flywheel mount (6) is mounted on said axle (1) between
said slidable ball stop (11) and said ball cup (8) via steel balls at both of
the two sides of said flywheel mount (6).
2. A rear hub assembly for bicycle as claimed in claim 1, wherein, a jacket
(9) is sleeved outside the flywheel mount (6).

The present invention provides a rear hub assembly for bicycle, comprises an axle
(1), a hub shell (12), a shaft cup (5) and a shaft stop (3), wherein, at one side of the
hub shell (12), a slidable ball stop (11) is installed between the shaft cup and a ball
cup, and the flywheel mount (6) is mounted on the axle(1) by the slidable ball
stop(11) and the ball cup located at its two sides. With this rear hub assembly, the
axial clearance of the rear hub may be adjusted from either side of the rear hub
conveniently, so as to be easy for assembling and repairing the bicycle, to
significantly reduce the diameter and the teeth of the flywheel, and to improve the
transmission ratio of the bicycle.

Documents:

1079-kol-2005-granted-abstract.pdf

1079-kol-2005-granted-claims.pdf

1079-kol-2005-granted-correspondence.pdf

1079-kol-2005-granted-description (complete).pdf

1079-kol-2005-granted-drawings.pdf

1079-kol-2005-granted-examination report.pdf

1079-kol-2005-granted-form 1.pdf

1079-kol-2005-granted-form 18.pdf

1079-kol-2005-granted-form 2.pdf

1079-kol-2005-granted-form 3.pdf

1079-kol-2005-granted-form 5.pdf

1079-kol-2005-granted-pa.pdf

1079-kol-2005-granted-priority document.pdf

1079-kol-2005-granted-reply to examination report.pdf

1079-kol-2005-granted-specification.pdf

1079-kol-2005-granted-translated copy of priority document.pdf

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Patent Number

233863

Indian Patent Application Number

1079/KOL/2005

PG Journal Number

16/2009

Publication Date

17-Apr-2009

Grant Date

16-Apr-2009

Date of Filing

28-Nov-2005

Name of Patentee

HON, DAVID TAK-WEI

Applicant Address

BLDG. DA HON, FURONG INDUSTRIAL ZONE, FURONG 6TH ROAD, SHAJING TOWN, BAO AN, SHENZHEN

Inventors:

#	Inventor's Name	Inventor's Address
1	HON, DAVID TAK-WEI	BLDG. DA HON, FURONG INDUSTRIAL ZONE, FURONG 6TH ROAD, SHAJING TOWN, BAO AN, SHENZHEN, 518125

PCT International Classification Number

B62K 25/00

PCT International Application Number

N/A

PCT International Filing date

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	200420095759.4	2004-11-29	China