Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2001-09-28
2003-12-02
Ramirez, Nestor (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S071000
Reexamination Certificate
active
06657336
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a vehicle AC generator, and particularly relates to an output terminal structure of a vehicle AC generator.
2. Description of the Related Art
FIG. 6
is an oblique perspective view showing a conventional rectifier applied to a vehicle AC generator, and
FIG. 7
is a cross sectional view of the main part describing the state of attachment of a conventional rectifier.
In FIG.
6
and
FIG. 7
, a rectifier
120
comprises: a plurality of positive electrode side and negative electrode side diodes
20
,
21
for full-wave-rectifying the three-phase AC; first and second cooling plates
122
,
123
for cooling positive electrode side and negative electrode side diodes
20
,
21
, respectively; insulators
24
,
27
for insulating the first and second cooling plates
122
,
123
; a circuit board
125
; and an output terminal bolt
126
. Here, the positive electrode side and negative electrode side diodes
20
,
21
make up the first and second diodes, respectively.
The first cooling plate
122
is formed approximately like a horseshoe, and the positive electrode side diodes
20
are attached on the main surface
122
a
thereof side by side in the circumferential direction. Then, a heat radiating fin
122
b
is provided rising from the rear surface (surface on the opposite side of the main surface) of the first cooling plate
122
. Furthermore, three flange parts
130
,
131
,
132
are provided at both end parts in the circumferential direction and at the middle part in the circumferential direction of the first cooling plate
122
, respectively. Each of the flange parts
130
,
131
,
132
is provided so that it may rise up from the main surface
122
a
of the first cooling plate
122
and after that, it may extend outward in the radial direction. Then, an output terminal bolt inserting through hole
134
is pierced in the extending-out end in the radial direction of the flange part
130
provided at one end part in the circumferential direction of the first cooling plate
122
, and attaching screw inserting through holes
133
are pierced in the extending-out ends in the radial direction of the residual flange parts
131
,
132
.
The second cooling plate
123
is formed approximately like a horseshoe with a diameter larger than that of the first cooling plate
122
, and the negative electrode side diode
21
is attached on the main surface
123
a
thereof side by side in the circumferential direction. Then, one output terminal bolt inserting through hole
138
and two attaching screw inserting through holes
135
are provided at both end parts in the circumferential direction and at the middle part in the circumferential direction of the second cooling plate
123
, so as to correspond to the output terminal bolt inserting through hole
134
and the attaching screw inserting through holes
133
provided in the first cooling plate
122
, respectively.
The circuit board
125
is a resin molded part having wiring insert-molded for constituting the diode bridge of the positive electrode side and negative electrode side diodes
20
,
21
, and it is formed approximately like a horseshoe similar to that of the second cooling plate
123
. Then, one output terminal bolt inserting through hole
137
and two attaching screw inserting through holes
136
are provided at both end parts in the circumferential direction and at the middle part in the circumferential direction of the circuit board
125
, so as to correspond to the output terminal bolt inserting through hole
134
and the attaching screw inserting through holes
133
provided in the first cooling plate
122
, respectively.
The insulator
24
is made of, for example, phenol resin, and is formed like a cylinder having a flange part
24
a
at the peripheral central part. The insulator
27
is made of, for example, phenol resin, and is formed like a cylinder having a flange part
27
a
at one end part. Furthermore, in the output terminal bolt
26
, a knurled groove
26
a
is provided on the anti-take-out side, and a male screw part
26
b
is provided on the take-out side.
For assembling this rectifier
120
, first of all, the insulator
24
is inserted into each attaching screw inserting through hole
135
of the second cooling plate
123
so that the flange part
24
a
may come into contact with the main surface
123
a
. Similarly, the insulator
27
is inserted into the output terminal bolt inserting through hole
138
of the second cooling plate
123
so that the flange part
27
a
may come into contact with the main surface
123
a
. Next, the first cooling plate
122
is arranged so that the insulator
24
may be inserted into each attaching screw inserting through hole
133
. Consequently, the first and second cooling plates
122
,
123
are coaxially arranged so that the main surfaces
122
a
,
123
a
may be positioned at the same surface, and are arranged so that the positive electrode side diode
20
and the negative electrode side diode
21
may face to each other. Furthermore, the circuit board
125
is overlapped onto the main surface
123
a
of the second cooling plate
123
so that the insulator
24
is inserted into each attaching screw inserting through hole
136
. Consequently, the connecting terminal
125
a
of the circuit board
125
is held between the terminals
20
a
,
21
a
of the positive electrode side and negative electrode side diodes
20
,
21
that are facing to each other, and joined by soldering. Next, the output terminal bolt
26
is inserted into the output terminal bolt inserting through holes
134
,
138
of the first and second cooling plates
122
,
123
from the output terminal bolt inserting through hole
137
of the circuit board
125
. Then, the knurled groove
26
a
of the output terminal bolt
26
is pressed into the output terminal bolt inserting through hole
134
of the first cooling plate
122
, and the output terminal bolt
26
and the first cooling plate
122
are electrically connected, and the rectifier
120
shown in
FIG. 6
is assembled.
As shown in
FIG. 7
, the first and second cooling plates
122
,
123
and the circuit board
125
are fastened together by screwing the attaching screw
40
inserted into each of the attaching screw inserting through holes
133
,
135
,
136
into the screw hole
2
a
provided in the rear bracket
2
, and thereby the rectifier
129
assembled like this is attached. The take-out side of the output terminal bolt
26
connected to the first cooling plate
122
is extending out of the opening
2
b
pierced in the rear bracket
2
. Then, by fastening the output terminal fastening nut
50
screwed onto the male screw part
26
b
of the output terminal bolt
26
, the insulating bush
41
made of phenol resin and mounted on the opening
2
b
of the bracket
2
, the first and second cooling plates
122
,
123
, and the circuit board
125
are fastened together and fixed to the rear bracket
2
.
Then, for connecting the vehicle side connecting terminal
42
made of copper material to the output terminal bolt
26
, the connecting terminal
42
is fitted onto the take-out side of the output terminal bolt
26
, and furthermore, the nut
44
is screwed onto the male screw part
26
b
. Then, by fastening the nut
44
, the connecting terminal
42
is fastened and fixed onto the outer end surface of the nut
50
. Here, the outer end surface of the output terminal-fastening nut
50
constitute the fastening seat.
Here, the first and second cooling plates
122
,
123
, the circuit board
125
, and the insulating bush
41
are fastened together and fixed to the rear bracket
2
by the fastening force of the output terminal fastening nut
50
, and therefore, even if the vibration based on the weight of the wire harness or the like from the vehicle is transmitted to the vehicle side connecting terminal
42
, there is no displacement in the axial direction of the output terminal bolt
26
, and initially, damage or the like of the rectifier
120
can be prevented. Furthermore, since the fastening
Adachi Katsumi
Asao Yoshihito
Morikaku Hideki
Oohashi Atsushi
Elkassabgi H. Y.
Ramirez Nestor
Sughrue & Mion, PLLC
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