Metal working – Method of mechanical manufacture – Disassembling
Reexamination Certificate
1999-10-18
2002-10-22
Tamai, Karl (Department: 2834)
Metal working
Method of mechanical manufacture
Disassembling
C310S049540
Reexamination Certificate
active
06467147
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to a magneto electric generator rotor used in an internal combustion engine spark plug and an implement for removing this rotor.
2. Explanation of Prior Art
FIGS. 45 and 46
show a broken down section of a small size engine used in a conventional operating machine In said figures numeral I is a small size engine,
1
is a cylinder for said engine
1
, and
13
is a connecting rod supporting a piston that moves in this cylinder
12
Also,
14
is a crankshaft for eccentric driving the end of said con rod
13
, and
15
is a nut to fix rotor B attached to the end of this crankshaft
14
.
One side of said rotor B that is on the opposite side of an axial hole part through which the crankshaft
14
is inserted through secures a magnet
2
and forms a pole piece part P together with a magnetic pole
3
, while the other side is composed of an insert core
26
of a ferromagnetic material that becomes counter weight part
4
. Further, a cooling fan and the like is installed to this insert core
26
to form one body.
Numeral
6
is a non-magnetic material layer such as a synthetic resin layer formed in a discoidal shape so as to cover said insert core
26
.
On one hand
7
is a ratchet claw which is supported in a freely revolving manner to an axle part
8
having a hole
8
a
as a cylinder part. Also, as shown in
FIG. 46
, a male screw
10
is inserted through this axle part
8
, and the tip of this male screw
10
is screwed into and fixed to female screw
27
which has been formed beforehand in said insert core
26
.
Numeral
9
is a ratchet spring of which one end is fixed to said axle part S, and the other end is fixed to said ratchet claw
7
and this gives a rotating force in one direction to the ratchet claw
7
.
Also, a reel axle
29
is provided in one body so as to project into an operating machine frame
28
opposite to said rotor B. A reel
16
having continuously wound thereon a rope
17
is supported on this reel axle
29
in a freely rotating manner. On to this reel
16
provided with an engagement part
30
which catches said ratchet claw
7
and gives a rotating force to the reel
16
.
A spiral spring
18
is installed in the periphery of said reel axle
29
to apply to said reel
16
a rotating force around this reel axle
29
.
31
is a washer fixed to the end of the reel axle
29
by a screw
32
and serves as a protector to prevent the axle hole of the reel
16
from coming off of the reel axle
29
. Moreover, the reel axle
29
, the reel
16
, the rope
17
, the spiral spring
18
. The engagement part
30
, the ratchet claw
7
and the like form a. recoil starter.
Also,
19
is a coil unit formed a power generating coil, ignition coil, ignition control circuit and the like in one body with thermosetting or thermoplastic synthetic resin and is fixed to said cylinder
12
side.
20
is a plug cap connected to said coil unit
19
through a cable
33
. This plug cap
90
is connected to a plug
21
next to the cylinder
12
.
28
is the operating machine frame housing an engine.
In a small size engine made of such a construction, the reel
16
rotates by manually pulling the rope
17
wound on this reel
16
, and the engagement part
30
installed on said reel
16
catches on the ratchet claw
7
on rotor B which has a magnet
2
buried in the insert core
26
, and rotates rotor B.
In this way, because said rotor B is attached to the crankshaft
14
of the engine
1
, the crankshaft
14
is driven to rotate by said rotor B and the engine
1
is cranked up.
On one hand, at that time the magnetic flux of the magnet
2
attached to said rotor B interlinks with the coil unit
19
having an ignition control circuit fixed to the cylinder
12
side of said engine
1
. Said coil} unit
16
will thus generate a power output and this power output will be supplied to the ignition plug
2
through the cable
3
q
and the plug cap
20
, and by this, the ignition plug
21
will generate a spark, ignite the gas mixture in the cylinder
12
, and start up the engine
1
.
Further, the fixing of the ratchet claw
7
described previously is done by screwing in the axle part
8
supporting it in a ratable manner to the insert core
26
of the male screw
10
. For this reason the female screw
27
conforming to the male screw
10
is machine tooled as aforementioned in the said rotor B.
On one hand, the rotor shown in
FIGS. 47 and 48
has been proposed in the past as a rotor used in a magnetic power generating machine such as the one described above. This rotor B I is a rotor having a hole piece part
44
with a magnet
42
on one side and an insert core
41
as a counter weight part
45
on the opposite side of an axial hole part
43
buried as an insert form within a synthetic resin (not shown). This rotor B
1
is described in, for example Japanese Utility Model Publication 1993-10526.
In this conventional rotor B I, the insert core
41
has been made into an integrated unit with a rivet
47
riveting together layers of multiple magnetic plates in multiple locations, and said axial hole part
43
is a straight hole with the diameter being equal in the direction of the axle.
Also, of the 3 magnetic poles,
46
,
46
a
and
46
b
forming the pole piece
44
, said magnet
42
is inserted in an open hole
49
formed in the center magnetic pole
46
, and both ends of the magnet protrude outward towards the axial fringe of each magnet pole
46
,
46
a
and
46
b.
In such insert core
41
, the pole piece part
44
and the counter weight part
45
are formed in one body. and because there is no need for assembly work and machine tooling after die casting the advantage of a relatively low cost is achieved.
On one hand, in the past, when removing the rotor of a magnetic power generator from the crankshaft
14
of an engine such as shown in
FIG. 45
, a pulley removing tool is used to remove the pulley attached to the rotary axle.
FIG. 49
shows such a conventional pulley removing tool and a rotor B
2
of a magnetic power generator removed therewith. In said drawing,
14
is the engine crankshaft, and this crankshaft
14
is provided with an axial hole
43
for rotor B
2
having a magnet and counter weight and the like, and made in a virtually circular form with a non-magnetic material.
Also, said rotor B
2
is fixed to the crankshaft
14
, so as not to come off freely, with a nut
15
screwed on a male screw part
48
formed on the crankshaft
14
end Moreover, F is a multiple bladed cooling fan installed along the circuit direction of one side of the rotor B
2
.
On one hand
50
is a bolt attachment part on which a bolt
51
is screwed on at the center part and to both ends are connected arms
52
and
53
through axle supports
54
and
55
, and a disengagement claw
53
a
is installed on the tip of the arm
53
.
With this pulley removing tool, first the disengagement claw
53
a
of each of said arm
53
ends is disengaged at the inner surface of the outer circuit part of the rotor B
2
that is pressed against the crankshaft
14
and the tip of said bolt
15
is pressed against the tip of the crankshaft
14
.
Further, the nut
15
is removed from the male screw part
48
before and after such operation, then said bolt
51
is screwed on the attachment part
50
. With this, the arms
52
and
53
will be subjected to an axial directed torque due to the screwing on power and change the position of the supporting axles
54
and
55
to the center, and the rotor B
2
, which was being held by the disengaging claw
53
a
, is removed in the axial direction from the crankshaft
14
.
FIG. 50
shows a conventional rotor removal tool and a rotor B
1
of a magnetic power generator that is removed with said tool. In the drawing
56
multiple screw holes provided on the rotor B
2
so as to pass through both sides of said rotor.
Also,
57
is a male screw, whose tip can be screwed into the screw hole
56
. Said male screw
57
is screwed into a through hold
59
provided in a plate
58
and the male screw
57
is prevented fro
Iwata Masao
Kawai Norio
Kitamura Yoshiki
Bednarek Michael D.
Oppama Industry Co. Ltd.
Pittman LLP Shaw
Tamai Karl
LandOfFree
Magneto electric generator rotor and an implement for... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Magneto electric generator rotor and an implement for..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magneto electric generator rotor and an implement for... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2954079