JP6983300B1 - Auxiliary switch for starter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an auxiliary switch for a starter having good layout and vibration resistance while improving the productivity of a housing of the starter. SOLUTION: This is a starter auxiliary switch 3 attached to a housing 8 of a starter 1 by a support metal fitting 17 and supplying a current for operating an electromagnetic switch device 2 for the starter, and the support metal fitting 17 has a cylindrical portion 17a and a cylinder. A mounting surface perpendicular to the axis of the portion 17a was formed, and the joint iron 16 was inserted into the cylindrical portion 17a and fixed. [Selection diagram] FIG. 5

Description

The present application relates to an auxiliary switch for a starter.

Conventionally, for a starter electromagnetic switch device that starts a large exhaust gas engine, such as an engine such as a bus or a truck, it is necessary to supply a large current in order to operate the starter electromagnetic switch device, and the current supply thereof. As a means, an auxiliary switch called an auxiliary switch, which is smaller than the electromagnetic switch device for a starter, is used. This auxiliary switch is installed in the vicinity of the starter electromagnetic switch device and is wired so as to form an electric circuit with the starter electromagnetic switch device, for example, as disclosed in Japanese Patent Application Laid-Open No. 10-18949. It is connected by.

Japanese Unexamined Patent Publication No. 10-18949

However, the auxiliary switch disclosed in Patent Document 1 is attached to the mounting seat formed on the housing of the motor constituting the starter by the support metal fitting, but the starter is attached to the mounting portion of the support metal fitting to the mounting seat. It is attached by inserting a screw into a screw hole formed in a direction perpendicular to the central axis. For this reason, in the processing of the housing, there is a problem that the processing man-hours increase and the manufacturing cost increases because the processing direction differs between the screw hole processing for attaching the auxiliary switch and the inner circumference processing of the housing.

Further, depending on the engine, the installation space of the auxiliary switch in the engine room is small, and the auxiliary switch may be mounted close to the housing side. However, the support metal fitting for mounting the auxiliary switch disclosed in Patent Document 1 is attached to the mounting seat. A pair of curved portions are formed in the mounting portion of the above, and the curved portions are attached by support metal fittings. Therefore, considering the workability of bending the curved portion, there is a limit in reducing the radius of curvature, and it becomes difficult to narrow the distance between the centers of the pair of curved portions. That is, there is a problem that the distance between the centers of the curved portions becomes wide, so that the area where the support metal fitting can support the auxiliary switch becomes small, and the vibration strength of the auxiliary switch decreases.

The present application discloses a technique for solving the above-mentioned problems, and an object thereof is to improve the productivity of a starter housing and to provide an auxiliary switch for a starter having good layout and vibration resistance. And.

The starter auxiliary switch disclosed in the present application includes an exciting coil, a fixed iron core that is excited by energization of the exciting coil to generate an attractive force, a joint iron that constitutes a magnetic circuit together with the fixed iron core, and the joint iron. A support metal fitting that is fixed to the starter and constitutes a mounting surface to the starter, a rod that moves by being urged by a movable iron core, a movable contact that is engaged with the rod, and a fixing that is arranged facing the movable contact. It is provided with a contact, a switch cap that accommodates the fixed contact and the movable contact, and forms a contact chamber.
A cylindrical portion and a mounting surface perpendicular to the axis of the cylindrical portion are formed on the support metal fitting, and the joint iron is inserted into the cylindrical portion and fixed.

According to the auxiliary switch for a starter disclosed in the present application, it is possible to improve the productivity of the housing of the starter and provide the auxiliary switch for the starter having good layout and vibration resistance.

FIG. 3 is a partial cross-sectional view of a starter equipped with an auxiliary switch for a starter according to the first embodiment. FIG. 3 is an electric circuit diagram of a starter equipped with an auxiliary switch for the starter according to the first embodiment. It is a figure which shows the internal structure of the auxiliary switch for a starter which concerns on Embodiment 1. FIG. It is an exploded view of the support metal fitting and the joint iron of the auxiliary switch for a starter which concerns on Embodiment 1. FIG. It is an exploded view of the auxiliary switch for a starter and a starter which concerns on Embodiment 1. FIG. It is an external view which shows the state which attached the auxiliary switch for a starter which concerns on Embodiment 1 to a starter.

Hereinafter, embodiments of the auxiliary switch for the starter according to the present application will be described with reference to the drawings. In each figure, the same or similar components are designated by the same reference numerals, and the sizes and scales of the corresponding components are independent of each other.

Embodiment 1.
FIG. 1 is a partial cross-sectional view of a starter equipped with an auxiliary switch for a starter according to the first embodiment, and FIG. 2 is an electric circuit diagram thereof.
In FIGS. 1 and 2, the starter 1 is a motor 4 by an electromagnetic switch device 2 for a starter, an auxiliary switch 3 for a starter described later, a motor 4, a shift lever 5, a shaft 6 of the motor 4, and a transmission mechanism (not shown). It is equipped with a pinion 7 to which the driving force of the above is transmitted. The motor 4 is supported by the housing 8 of the starter 1, and the pinion 7 is configured to be detachable from the ring gear (not shown) of the engine. Further, the starter auxiliary switch 3 is arranged side by side in the starter electromagnetic switch device 2 as shown in FIG.

When the starter electromagnetic switch device 2 is urged in response to the start signal, the starter 1 moves the shift lever 5 and moves the pinion 7 engaged with the shaft 6 via the shift lever 5 forward, that is, in the figure. In No. 1, it is pushed upward to mesh the pinion 7 with the ring gear of the engine. Further, a current flows through the motor 4 via the electromagnetic switch device 2 for the starter to rotate the motor 4, and the pinion 7 engaged with the shaft 6 rotates to transmit power to the engine to drive the engine. Start.

Next, the internal structure of the starter auxiliary switch 3 will be described in detail.
3A and 3B are views showing the internal structure of the auxiliary switch 3 for a starter. FIG. 3A is a plan view, FIG. 3B is a sectional view taken along line AA of FIG. 3A, and FIG. 3C is a bottom view. Is.
In FIG. 3, the starter auxiliary switch 3 includes an exciting coil 10 wound around the bobbin 9, and both ends of the exciting coil 10 are electrically connected to a pair of terminals 11 fixed to the bobbin 9. .. The pair of terminals 11 are electrically connected to the pair of switch terminals 13 fixed to the switch cap 12.

On the inner circumference of the bobbin 9, a fixed iron core 14 is arranged on one side in the axial direction, and a movable iron core 15 is arranged so as to face the fixed iron core 14. Further, as will be described later, the joint iron 16 constituting the magnetic circuit is formed in a cylindrical shape together with the fixed iron core 14, and is inserted into the inside of the cylinder of the support metal fitting 17 and welded or press-fitted. The support metal fitting 17 is fixed to the joint iron 16 to form a mounting surface for the starter 1. Further, the joint iron 16 is arranged on the outer periphery of the bobbin 9, and the rod 18 is slidably arranged in the hollow portion of the fixed iron core 14 in the axial direction thereof. The rod 18 is provided with a movable contact 19 and is urged by providing a point spring 21 between the rod 18 and the bush 20.

A pair of fixed contacts 22 arranged to face the movable contact 19 are fixed inside a switch cap 12 that accommodates the fixed contact 22 and the movable contact 19 to form a contact chamber. A recess 12a is formed in the switch cap 12, and a return spring 23 is housed in the recess 12a, and is configured to press and urge the fixed core 14 and the movable core 15 in a direction to separate them from each other via a rod 18. There is. The packing 24 is sandwiched between the switch cap 12 and the joint iron 16.

FIG. 4 is an exploded view of the joint iron 16 and the support metal fitting 17 of the auxiliary switch 3 for the starter, FIG. 5 is an exploded view of the auxiliary switch 3 for the starter and the starter 1, and FIG. 6 shows the auxiliary switch 3 for the starter attached to the starter 1. It is an external view which shows the state.
As shown in FIGS. 4 to 6, the support metal fitting 17 is formed with a cylindrical portion 17a and a mounting surface 17b perpendicular to the axis of the cylindrical portion 17a. The mounting surface 17b is formed in a flat plate shape, and a mounting hole 17c is formed in the mounting surface 17b in the axial direction of the cylindrical portion 17a, and the mounting surface 17b can be mounted by a screw 25 from the central axial direction of the starter 1. There is. The cylindrical portion 17a and the mounting surface 17b are formed by plastically deforming a single iron plate by drawing.

Further, the joint iron 16 is inserted into the cylindrical portion 17a of the support metal fitting 17 to support the entire circumference, and even if the position of the starter auxiliary switch 3 is brought closer to the side of the housing 8, the support metal fitting 17 and the joint iron 16 are supported. The contact area of the starter auxiliary switch 3 does not change, and the starter auxiliary switch 3 can be attached without impairing the vibration resistance, and the layout can be improved.

As described above, the starter auxiliary switch 3 according to the first embodiment is arranged side by side in the starter electromagnetic switch device 2, and the mounting surface 17b of the starter auxiliary switch 3 is placed on the mounting seat provided in the housing 8 of the starter 1. Are brought into contact with each other, and are attached by screws 25 from the direction of the central axis of the starter 1. Therefore, in the processing of the housing 8, the screw hole processing for mounting the auxiliary switch 3 for the starter and the inner peripheral processing of the housing 8 can be performed in the same processing direction, so that the processing man-hours can be reduced and the manufacturing cost can be prevented from rising. Can be done.

Further, since the support metal fitting 17 is formed with the cylindrical portion 17a and the mounting surface 17b perpendicular to the axis of the cylindrical portion 17a, the joint iron 16 of the starter auxiliary switch 3 is inserted into the cylindrical portion 17a and fixed. Therefore, the auxiliary switch 3 for the starter can be attached without impairing the vibration resistance, and the layout can be improved.

1 Starter, 2 Starter electromagnetic switch device, 3 Starter auxiliary switch,
4 motors, 5 shift levers, 6 shafts, 7 pinions, 8 housings,
9 bobbins, 10 exciting coils, 11 terminals, 12 switch caps,
12a recess, 13 switch terminals, 14 fixed iron core, 15 movable iron core, 16 joint iron,
17 Support bracket, 17a cylindrical part, 17b mounting surface, 17c mounting hole, 18 rod, 19 movable contact, 20 bush, 21 point spring, 22 fixed contact,
23 return springs, 24 packings, 25 screws.

Claims (2)

With the exciting coil,
A fixed iron core that is excited by energization of the exciting coil to generate an attractive force,
The joint iron that constitutes the magnetic circuit together with the fixed iron core,
The support metal fittings fixed to the joint iron and forming the mounting surface to the starter,
A rod that moves by being urged by a movable iron core,
Movable contacts engaged with the rod and
Fixed contacts arranged facing the movable contacts and
A switch cap that accommodates the fixed contact and the movable contact and forms a contact chamber,
Equipped with
An auxiliary switch for a starter, characterized in that a cylindrical portion and a mounting surface perpendicular to the axis of the cylindrical portion are formed on the support metal fitting, and the joint iron is inserted into the cylindrical portion and fixed. The auxiliary switch for a starter according to claim 1, wherein the cylindrical portion and the mounting surface are formed by plastically deforming an iron plate by drawing.

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