Metal working – Means to assemble or disassemble – Including means to relatively position plural work parts
Reexamination Certificate
2003-04-01
2004-03-02
Watson, Robert C. (Department: 3723)
Metal working
Means to assemble or disassemble
Including means to relatively position plural work parts
C029S281600, C029S271000
Reexamination Certificate
active
06698075
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a holding device of a timing belt wheel structure, and more particularly to a holding device that can be used to hold and position timing belt wheel structures of different sizes, types and specifications without having to prepare holders of different sizes, types and specifications, thereby enhancing convenience in operation and maintenance of the timing belt wheel structure.
2. Description of the Related Art
A first conventional holder
1
of a timing belt wheel structure in accordance with the prior art shown in
FIG. 1
has a top end provided with two protruded teeth
2
, and a bottom end provided with two protruded teeth
2
′. Thus, the holder
1
can be inserted between two opposite timing belt wheels
8
of the timing belt wheel structure, whereby the protruded teeth
2
and
2
′ can be inserted into and secured in the toothed grooves of the two opposite timing belt wheels
8
, to prevent the two opposite timing belt wheels
8
from being rotated, thereby facilitating the user replacing the timing belt
9
of the timing belt wheel structure. However, the first conventional holder only has a fixed size and cannot be used to hold and position timing belt wheels of different sizes, types and specifications, so that the user has to prepare multiple holders of different sizes, types and specifications to fit the timing belt wheels of different sizes, types and specifications, thereby causing inconvenience in operation and maintenance.
A second conventional holder of a timing belt wheel structure in accordance with the prior art shown in
FIGS. 2 and 3
comprises two arm plates
3
, and a connecting member
4
mounted between the two arm plates
3
. Each of the two arm plates
3
is pivoted with the connecting member
4
by a locking member
5
. Each of the two arm plates
3
has a first end formed with an upright fixing snap
302
vertical to the arm plate
3
, and a second end pivoted with a movable snap
304
by a securing member
6
. The movable snap
304
is opposite to the fixing snap
302
. The fixing snap
302
is laterally protruded with a snap tooth
3022
, and each of the movable snap
304
is laterally protruded with a snap tooth
3042
that is opposite to the snap tooth
3022
of the fixing snap
302
, so that the snap tooth
3022
of the fixing snap
302
can mate with the snap tooth
3042
of the movable snap
304
to be inserted into a timing belt wheel structure for holding and securing the timing belt wheel structure.
In operation, referring to
FIG. 3
, the second conventional holder can be used to hold and secure two timing belt wheels
8
of the timing belt wheel structure. First, each of the two locking members
5
and each of the two securing members
6
are loosened. Then, the second conventional holder can be inserted between the two timing belt wheels
8
of the timing belt wheel structure. The distance and the angle between the two arm plates
3
can be adjusted to fit the relative position of the two timing belt wheels
8
, and each of the two movable snaps
304
may be driven, so as to adjust the distance between the movable snap
304
and the fixing snap
302
, so that the snap tooth
3022
of the fixing snap
302
can mate with the snap tooth
3042
of the movable snap
304
to be inserted into the toothed groove of the outer periphery of the two timing belt wheels
8
of the timing belt wheel structure for holding and securing the two timing belt wheels
8
of the timing belt wheel structure. Then, each of the two locking members
5
and each of the two securing members
6
can be tightened, so as to secure and position each of the two arm plates
3
and each of the two movable snaps
304
, so that the two timing belt wheels
8
of the timing belt wheel structure can be secured and positioned by the snap tooth
3022
of the fixing snap
302
and the snap tooth
3042
of the movable snap
304
, thereby facilitating the user replacing the timing belt
9
of the timing belt wheel structure.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a holding device that can be used to hold and position timing belt wheel structures of different sizes, types and specifications without having to prepare multiple holders of different sizes, types and specifications, thereby greatly enhancing convenience in operation and maintenance of the timing belt wheel structure.
Another objective of the present invention is to provide a holding device of a timing belt wheel structure, wherein each of the snap plates has a simple configuration, so that the snap plates can be worked easily, thereby reducing costs of fabrication.
In accordance with the present invention, there is provided a holding device of a timing belt wheel structure, comprising two links, a first holding member secured on a first end of each of the two links, and a second holding member movably mounted on each of the two links so as to adjust the distance between the first holding member and the second holding member, wherein:
each of the first holding member and the second holding member includes a first snap plate, a second snap plate, and a locking bolt;
the first snap plate has a first end formed with a bent snap portion and a second end provided with a shaft tube;
the second snap plate has a first end formed with a bent snap portion and a second end provided with a threaded tube juxtaposed to the shaft tube; and
the locking bolt has a first end extended through the shaft tube and screwed into the threaded tube, so as to combine the first snap plate and the second snap plate, thereby forming the first holding member and the second holding member.
Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
REFERENCES:
patent: 5755029 (1998-05-01), Learned
patent: 5950294 (1999-09-01), Gibbs
patent: 6058585 (2000-05-01), Soleymani
patent: 6332256 (2001-12-01), Dawson
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