Rotating-drum flying shear

Details Rotating-drum flying shear Rotating-drum flying shear

2000-02-15

2002-04-16

Ashley, Boyer (Department: 3724)

Cutting

Tool or tool with support

Joint or connection

C083S698610, C083S502000, C083S698510, C083S344000

Reexamination Certificate

active

06370998

ABSTRACT:

FIELD OF THE INVENTION
This invention relates to a rotating-drum flying shear applied to a hot rolling equipment line or the like.
BACKGROUND OF THE INVENTION
A rotating-drum flying shear applied to a hot rolling equipment line or the like is disclosed, for example, in Japanese Unexamined Patent Publication No. 123919/1993.
FIG. 8
shows the outline of a conventional rotating-drum flying shear disclosed in this publication.
In the conventional rotating-drum flying shear, as shown in
FIG. 8
, an extractable bearing frame
102
is mounted inside a housing
101
. Inside the bearing frame
102
, an upper rotating drum
103
and a lower rotating drum
104
as a pair are supported rotatably and movably toward and away from each other. The rotating drums
103
and
104
have shearing blades
103
a
and
104
a,
respectively, on their outer peripheral portions along their axial direction. That is, the upper rotating drum
103
has shaft end portions supported by the bearing frame
102
via eccentric sleeves
105
, while the lower rotating drum
104
has shaft end portions supported by the bearing frame
102
via eccentric sleeves
106
. By turning the eccentric sleeves
105
and
106
, the upper and lower rotating drums
103
and
104
can be moved up and down so as to be movable toward and away from each other.
Laterally of the housing
101
, a drive motor
107
is installed. An output shaft of the drive motor
107
is coupled to a gear box
108
having a pair of timing gears
108
a,
108
b.
A rotating shaft of the timing gear
108
a
is connected to the shaft end portion of the upper rotating drum
103
by a transmission shaft
110
having universal joints
109
a,
109
b.
Whereas a rotating shaft of the timing gear
108
b
is connected to the shaft end portion of the lower rotating drum
104
by a transmission shaft
112
having universal joints
111
a,
111
b.
Thus, when the drive motor
107
is driven, its driving force is transmitted to the upper rotating drum
103
via the timing gear
108
a
and the transmission shaft
110
, and is also transmitted to the lower rotating drum
104
via the timing gear
108
b
and the transmission shaft
112
. As a result, the upper rotating drum
103
and the lower rotating drum
104
can be rotated synchronously in opposite directions.
A coupling gear
113
is fixed to the outside of the eccentric sleeve
105
that supports each shaft end portion of the upper rotating drum
103
. A coupling gear
114
meshing with the coupling gear
113
is fixed to the outside of the eccentric sleeve
106
that supports each shaft end portion of the lower rotating drum
104
. Below the coupling gear
114
, a coupling gear
115
meshing with the coupling gear
114
is rotatably supported on the bearing frame
102
by a connecting shaft
116
. Beside the housing
101
, a drive motor
117
is installed. An output shaft
118
of the drive motor
117
is connected to the connecting shaft
116
via a transmission shaft
120
having universal joints
119
a,
119
b.
Thus, when the drive motor
117
is driven, its driving force is transmitted to the coupling gear
115
via the transmission shaft
120
and the connecting shaft
116
. As a result, the eccentric sleeve
105
integral with the coupling gear
113
is turned. Also, the eccentric sleeve
106
integral with the coupling gear
114
is turned. Hence, the rotating drums
103
and
104
can be moved toward and away from each other.
Furthermore, an interlocking gear
121
is fixed to each shaft end portion of the upper rotating drum
103
externally of the coupling gear
113
. To each shaft end portion of the lower rotating drum
104
, an interlocking gear
122
is fixed externally of the coupling gear
114
. Thus, the interlocking gear
121
and the interlocking gear
122
do not mesh when the upper rotating drum
103
and the lower rotating drum
104
are apart from each other. When the upper rotating drum
103
and the lower rotating drum
104
are close to each other, the interlocking gear
121
and the interlocking gear
122
mesh. When the rotating drums
103
and
104
are rotated at this time, these rotating drums
103
and
104
can be instantaneously put into coaction with strong mesh.
With the foregoing conventional rotating-drum flying shear, a strip plate (not shown) moves fast, while being rolled, on a rolling equipment line. The strip plate passes between the upper rotating drum
103
and the lower rotating drum
104
that are separated from each other. Then, the strip plate is wound on a down-coiler at the end of the line. When the windup of the strip plate approaches completion, the drive motor
107
is driven to start rotating the rotating drums
103
and
104
synchronously in opposite directions via the transmission shafts
110
and
112
, and adjust their rotational speed to be commensurate with the traveling speed of the strip plate. At a shearing position of the strip plate, the drive motor
117
is driven to turn the eccentric sleeves
105
,
106
via the transmission shaft
120
and the coupling gears
115
,
113
,
114
, thereby making the rotating drums
103
and
104
approach each other. At the approaching positions of the rotating drums
103
and
104
, the interlocking gears
121
and
122
mesh, whereupon the rotating drums
103
and
104
coact with instantaneous strong mesh. Consequently, the strip plate during movement can be sheared by the shearing blades
103
a
and
104
a.
The conventional rotating-drum flying shear allows the single drive motor
107
to rotate the two rotating drums
103
and
104
. For this purpose, the output shaft of the drive motor
107
is coupled to the gear box
108
having the timing gears
108
a,
108
b,
and the gear box
108
is connected to the shaft end portions of the rotating drums
103
and
104
by the two transmission shafts
110
and
112
. This poses the problem that the two transmission shafts
110
and
112
are elongated, and this drive system is upsized. Moreover, the two transmission shafts
110
and
112
are disposed at upper and lower positions in the same vertical plane. This makes it difficult to support these transmission shafts
110
and
112
, and complicates the arrangement of a transmission system, so that its maintenance is not easy.
The present invention has been accomplished to solve these problems, and its object is to provide a rotating-drum flying shear of a downsized and simplified structure.
SUMMARY OF THE INVENTION
A rotating-drum flying shear according to the present invention comprises: a bearing frame; a pair of rotating drums each having shaft end portions rotatably supported by the bearing frame, and each having a shearing blade on an outer peripheral portion of the drum along an axial direction of the drum; rotating drum drive means for rotationally driving one of the pair of rotating drums; a pair of eccentric sleeves interposed, rotatably relative to each other, between the bearing frame and the shaft end portions of the pair of rotating drums; eccentric sleeve drive means for rotating the pair of eccentric sleeves relative to each other, thereby making the pair of rotating drums approach or separate from each other; rotating drum interlocking means for interlocking the pair of rotating drums when the pair of rotating drums approach each other; and rotating drum synchronizing means for synchronously rotating the one rotating drum and the other rotating drum regardless of approaching positions or separating positions of the pair of rotating drums.
Thus, a single transmission system connects the rotating drum drive means and the rotating drums together, so that this transmission system can be downsized. Besides, it is easy to support this transmission system, and its arrangement can be simplified. Consequently, its maintenance can be performed with safety and ease.
In the rotating-drum flying shear of the invention, the rotating drum interlocking means has a pair of interlocking gears fixed to the shaft end portions of the pair of rotating drums, and the rotating drum synchronizing means has a pair of t

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