Electromagnetic switch device for starter

Patent metadata

Field	Value
Publication number	US-10344732-B2
Application number	US-201515541069-A
Country	US
Kind code	B2
Filing date	Apr 7, 2015
Priority date	Apr 7, 2015
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

Provided is an electromagnetic switch device for starter in which an auxiliary relay is provided and which has a small size and can be easily manufactured. The electromagnetic switch device for starter includes: a main contact chamber forming a space in which a pair of main fixed contacts are located and a main movable contact can move; and a sub contact chamber forming a space in which a pair of sub fixed iron cores (A), (B) are located and a sub movable contact can move; and a cylindrical terminal block in which the main contact chamber and the sub coil are arranged so as to be adjacent to each other in the radial direction with a partition wall provided therebetween and separating the sub coil and the main contact chamber from each other.

First claim

The invention claimed is:

1. An electromagnetic switch device for starter, comprising:
an electromagnetic switch which includes a pair of main fixed contacts, a main movable contact, an attraction coil, and a holding coil and which opens and closes an electric circuit for a motor via the pair of main fixed contacts, and when the attraction coil and the holding coil are energized, moves an overrunning clutch via a shift lever;
an auxiliary relay which includes a pair of sub fixed contacts, a sub movable contact, and a sub coil, the pair of sub fixed contacts being connected to the attraction coil and the holding coil of the electromagnetic switch, the auxiliary relay energizing the attraction coil and the holding coil of the electromagnetic switch via the pair of sub fixed contacts in response to a starting signal; and
a cylindrical terminal block to which a battery terminal connected to a plus terminal of a battery and a motor terminal connected to the motor are provided, and in which a main contact chamber and the sub coil of the auxiliary relay are arranged so as to be adjacent to each other in a radial direction with a partition wall provided therebetween, the main contact chamber storing the pair of main fixed contacts and the main movable contact of the electromagnetic switch, the terminal block integrally holding the electromagnetic switch and the auxiliary relay in parallel to an output shaft of the motor.

2. An electromagnetic switch device for starter, comprising:
a pair of main fixed contacts which form a motor electric circuit for supplying power to a motor and are located at positions electrically and mechanically separated from each other;
a battery terminal having an end at which one of the pair of main fixed contacts is formed, and another end to which a wire electrically connected to a plus terminal of a battery is fixed;
a motor terminal having an end at which the other one of the pair of main fixed contacts is formed, and another end to which a wire connected to the motor is fixed;
a main movable contact which forms the motor electric circuit by electrically connecting the pair of main fixed contacts;
a main movable core which is made of a magnetic material and moves the main movable contact toward the pair of main fixed contacts;
a main fixed core which is made of a magnetic material and generates an attraction force between the main movable core and the main fixed core;
an attraction coil which generates a magnetic field for attracting the main movable core to the main fixed core;
a holding coil which generates a magnetic field for holding the main movable core at a movement end after the attraction;
a main yoke which is made of a magnetic material and serves as a magnetic circuit for the magnetic field generated by the attraction coil and the holding coil;
a pair of sub fixed contacts which form an electric circuit for supplying power to the attraction coil and the holding coil and are located at positions electrically and mechanically separated from each other;
a sub movable contact which forms an electric circuit for supplying power to the attraction coil and the holding coil, by electrically connecting the pair of sub fixed contacts;
a sub movable core which is made of a magnetic material and generates a propulsive force for moving the sub movable contact toward the pair of sub fixed contacts;
a sub coil which generates a magnetic field as a base for the propulsive force of the sub movable core;
a sub yoke serving as a magnetic circuit for the magnetic field of the sub coil;
a pair of sub fixed cores located at both ends of the sub yoke and serving as a magnetic circuit;
a main contact chamber forming a space in which the pair of main fixed contacts are located and the main movable contact can move;
a sub contact chamber forming a space in which the pair of sub fixed contacts are located and the sub movable contact can move; and
a cylindrical terminal block in which the main contact chamber and the sub coil are arranged so as to be adjacent to each other in a radial direction with a partition wall provided therebetween and separating the sub coil and the main contact chamber from each other.

3. The electromagnetic switch device for starter according to claim 2 , wherein
the terminal block has an opening of the main contact chamber, at one end in an output shaft direction of the motor, and has an opening constituting the sub contact chamber, at the other end in the output shaft direction.

4. The electromagnetic switch device for starter according to claim 2 , further comprising:
a connector assembly which includes a plurality of connectors formed by stamping a conductive material, and which forms the motor electric circuit and an electric circuit for supplying power to the attraction coil and the holding coil, wherein
the connector assembly includes
a connector (A) connecting one of the pair of sub fixed contacts, and the battery terminal,
a connector (B) connecting the other one of the pair of sub fixed contacts, and one end of the attraction coil and one end of the holding coil,
a connector (C) connecting the other end of the attraction coil and the motor terminal,
a connector (D) connecting one end of the sub coil and an S terminal, and
a resin member integrally fixing at least one pair of the connector (A), the connector (B), the connector (C), and the connector (D).

5. The electromagnetic switch device for starter according to claim 4 , wherein
at least one pair of the connector (A), the connector (B), the connector (C), and the connector (D) are formed by the same material and integrally fixed with the resin member, and thereafter are separated by tie bars being cut.

6. The electromagnetic switch device for starter according to claim 4 , wherein
either a set of the connector (A) and one of the pair of sub fixed contacts, or a set of the connector (B) and the other one of the pair of sub fixed contacts, are formed by the same member.

7. The electromagnetic switch device for starter according to claim 4 , wherein
the connector (A), the connector (B), the connector (C), and the connector (D) have conductive surfaces and are subjected to insulation treatment after being assembled.

8. The electromagnetic switch device for starter according to claim 4 , further comprising:
an O ring for preventing water entry, the O ring being provided around at least one of an outer circumference of the battery terminal and an outer circumference of the motor terminal.

9. The electromagnetic switch device for starter according to claim 4 , wherein
the sub yoke is provided so as to avoid a partition wall direction and an outermost circumferential direction of the terminal block.

10. The electromagnetic switch device for starter according to claim 4 , wherein
at least one of the pair of sub fixed cores is formed by the same member as the sub yoke and is formed integrally with the sub yoke.

11. The electromagnetic switch device for starter according to claim 4 , wherein
the sub coil and the sub contact chamber are located on one side with respect to a line connecting a center of the battery terminal and a center of the motor terminal, and the S terminal is located on the other side.

12. The electromagnetic switch device for starter according to claim 4 , further comprising:
a fixing member serving as a magnetic circuit for the sub coil, fixing the terminal block and the main fixed core, and made of a magnetic material.

13. The electromagnetic switch device for starter according to claim 4 wherein
the terminal block has a protruding portion protruding toward an outer circumferential side with respe

Assignees

• Mitsubishi Electric Corp

Inventors

• Morimoto Yoshihiro

Classifications

• F02N15/006

  Assembling or mounting of starting devices · CPC title

• F02N11/087 Primary

  Details of the switching means in starting circuits, e.g. relays or electronic switches · CPC title

• H01H50/40

  Branched or multiple-limb main magnetic circuits · CPC title

• F02N15/067

  the starter comprising an electro-magnetically actuated lever · CPC title

• H01H50/42

  Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement · CPC title