JPS6111977Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a starting motor.

In the conventional starting motor of this kind, as shown in FIG. 1 in cross-section of the configuration of its main parts, an electromagnetic switch 2 is attached to a DC motor 1, and 3 is a field assembly of the DC motor 1. It is composed of a yoke 4, a pole 5, and a field coil 6.

The field coil 6 has an outlet lead wire 7.
This outlet lead wire 7 passes through the grommet 8 and is connected to the electromagnetic switch 2.

A rear bracket 9 is attached to the field assembly 3, and the grommet 8 is connected by this bracket 9.
is fixed by pressing. 10 indicates an armature, and 11 indicates a brush.

One end of the electromagnetic switch 2 is sealed with a mold cap 13 made of Bakelite, and a fixed contact 1 is inserted into a hole 13a formed in the mold cap 13.
2 and 13 are inserted. A terminal 14 electrically connected to the end of the outlet lead wire 7 is fixed to the fixed contact 12 with a nut 15. Note that 16 is a terminal, 17 is a toothed washer, and is used to fix the fixed contact 12 to the mold cap 13 by caulking.
Furthermore, 18 is a spring washer.

The mold cap 13 is fixed together with a fixed iron core 20 by a magnetic case 19, and a solenoid coil 21 is inserted between the fixed iron core 20 and the magnetic case 19.

The movable contact assembly 22 is loosely fitted into the center hole 20a of the fixed iron core 20 so as to be movable in the front and rear direction.
Movable contact shaft 2 made of resin such as nylon
3, a movable contact 24 loosely fitted thereto, and springs 26 disposed on both sides of the movable contact 24,
27, and the movement of the movable contact 24 to the left in the figure is restricted by a retaining ring 25 fixed on the movable contact shaft 23. 28 indicates Patsukin.

In the starting motor with the above configuration, when the key switch of the engine (not shown) is closed, the solenoid coil 21 is energized and excited, and the movable iron core (not shown) is attracted to the left fixed iron core 20 side, and the movable contact shaft 23 is pushed to the left in the figure, and the movable contact 2
4 is brought into contact with a pair of fixed contacts 12, 12, and a main contact circuit for energizing the DC motor 1 is closed.

By closing the main contact circuit, the fixed contact 12
An energizing circuit is formed from the outlet lead wire 7 to the field coil 6, the brush 11, and the armature 10 through a terminal fixed to the terminal, and the main current flows to the DC motor 1 to rotate the armature 10.

A conventional starter motor having such a configuration includes a mechanism for connecting an outlet lead wire to a fixed contact as described above, that is, a terminal 14, a toothed washer 17, a spring washer 18, and a nut 1.
Since a fixing means such as No. 5 is required, the structure of the relevant part becomes extremely complicated and large, which leads to an increase in cost and electrical resistance.

This invention was made with the aim of solving the above-mentioned conventional drawbacks.The fixed contact of the electromagnetic switch attached to the starting motor is constructed of a plate-shaped conductive member, and this plate-shaped conductive member The inner end of the coil is opposed to the movable contact of the DC motor, and the outer end is extended to the outlet end of the field coil, to which an outlet lead wire is connected.

Hereinafter, an embodiment of this invention will be described with reference to FIG. 2, using the same reference numerals for parts common to those in FIG. 1.

In this invention, as shown in FIG. 2, a plate-shaped conductive member 30, such as an electrolytic copper plate, is insert-molded in the mold cap 29 as a fixed contact in this embodiment. This plate-shaped conductive member 30
has a bent plate shape with a substantially Z-shaped side surface, and is provided along the inner surface of the mold cap 29, facing the movable contact 24 so as to be openable and closable, and the contact portion 30a. It is folded in a row,
Penetration portion 30 passing through the mold cap 29
c, and a connecting portion 30b which is bent and connected to the penetrating portion 30c, is located on the outer surface of the mold cap 29, and is connected to the outlet lead wire 7.

Incidentally, members common to those in FIG. 1 are given the same reference numerals, and their functions are the same as those in FIG. 1, so a description thereof will be omitted.

As described above, this device forms a fixed contact with a plate-shaped conductive member such as an electrolytic copper plate, molds this into a mold cap, extends it along the inner and outer surfaces of the mold cap, and connects the connecting portion extending to the outer surface with an opening. Since the output lead wire is connected and the contact part extending along the inner surface is arranged at a position where the movable contact can come into contact, the structure of this part can be extremely simple and compact, and can be provided at a significantly low cost. In addition to being able to significantly reduce electrical resistance,
The device can be made more reliable than conventional devices.

In the above embodiment, the plate-shaped conductive member 30 is insert-molded into the mold cap 29, but the plate-shaped conductive member 30 may be attached to the mold cap 29 after molding the mold cap 29 alone. You can. Further, the means for connecting the connecting portion 30b of the plate-shaped conductive member 30 and the outlet lead wire 7 is not limited to caulking, but may also be combined with soldering.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the main parts of a conventional starter motor, and FIG. 2 is a view corresponding to FIG. 1 showing an embodiment of this invention. 1...DC motor, 2...Electromagnetic switch, 3...
...Field assembly, 4...Yoke, 5...Pole, 6
...Field coil, 7...Output lead wire, 8
...Grommet, 9...Rear bracket, 10...
... Armature, 11 ... Brush, 12 ... Fixed contact,
13...mold cap, 19...case, 2
0... Fixed iron core, 21... Solenoid coil, 2
2...Movable contact assembly, 23...Movable contact shaft, 2
4...Movable contact, 29...Mold cap, 3
0... Plate conductive member, 30a... Contact portion, 30b
...Continuation part, 30c...Penetration part. In addition, in the figures, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] In a starting motor having a molded cap in which one end of an electromagnetic switch is sealed and a fixed contact is inserted, the fixed contact is capable of being opened and closed by the movable contact. a contact portion provided along the inner surface of the mold cap in opposing shapes; a penetrating portion connected to and bent at the contact portion and penetrating the mold cap; A starting motor characterized in that it is constructed of a bent plate-shaped electrically conductive member that is located on the outer surface of the mold cap and has a connecting portion to which an outlet lead wire is connected.