JPH0627829Y2 - Forward / reverse engine starter - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a starting device for a forward / reverse rotation engine equipped with a starter motor capable of switching forward / reverse rotation.

(Prior Art and Problems to Be Solved) Conventionally, in this type of forward / reverse rotation engine starter, a forward / reverse, neutral / reverse rotation three-position switch is used to return to the neutral position when the hand is released. Was used. In this system, for example, when the switch is operated in the normal rotation direction, the starter motor rotates in the normal direction and the engine rotates in the normal rotation direction, but when the switch is released, the switch returns to the neutral position. The engine was installed so that it would continue to rotate in the normal direction. Therefore, it is necessary to provide a separate switch for stopping the engine by short-circuiting the primary circuit of the ignition circuit of the engine.

[Constitution of device]

(Means for Solving the Problems) In the present invention, an electric circuit of a starter motor is switchably provided by a switching switch that switches between three positions of normal rotation, stop, and reverse rotation and holds each position. When reversing,
A detection device that detects the rotational speed of the engine to shut off the electric circuit of the starting motor is provided, and a stop device that short-circuits the primary circuit of the ignition circuit at the stop position is provided.

(Operation) With the above-described configuration, when the switching switch is operated to the forward or reverse rotation position, the starter motor is normally or reversely rotated and the engine is normally or reversely rotated. The switching switch holds the normal or reverse position as it is. When the engine starts to rotate forward or reverse, the detection device senses
The electric circuit of the starting motor is cut off and the starting motor stops, but the engine continues to rotate. When the switching switch is switched to the stop position, the primary circuit of the ignition circuit is short-circuited, the discharge is stopped, and the engine is stopped. At the same time, the detection device recovers, but the electric circuit of the starting motor is cut off because the switching switch is in the stop position.

Embodiment An embodiment of the present invention will be described in detail below with reference to the drawings.

In FIG. 1, a starting motor 1 for starting an engine (not shown) is connected to a battery 5 via a forward / reverse switching relay 3. A charging connector 7 is connected in parallel with the battery 5. The contacts of the rotation detection relay R1, the forward contact 11 and the reverse contact 13 of the 3-position switching switch 9, and the relay R2 are connected in series to both electrodes of the battery 5, and the contact r2 of the relay R2 is a forward / reverse switching relay. 3 is provided in series and contacts r when energizing relay R2.
Two are provided to connect. The two poles of the primary circuit 17 of the ignition coil 15 which are sensitive to the magnet wheel of the engine have an electronic ignition unit 23 for short-circuiting the both poles at a predetermined ignition timing to generate electricity in the secondary circuit 19 and discharge the spark plug 21. It is connected. Further, both poles of the primary circuit 17 are connected to a detection device 25 that emits an electric signal when a predetermined voltage is reached, in this case, when the engine starts to rotate, and the rotation detection relay R1 is connected by this electric signal. It operates and cuts off the current. One pole of the primary circuit 17 is connected to the anode of the battery 5 via the diode 27. At the stop position of the switching switch 9, the stop device 28 of the engine is connected to the stop contact 29 so that the primary circuit 17
Is provided to short-circuit. Also, switch 9
The reverse rotation switching contact 31 is connected to the forward / reverse rotation switching relay 3 at the reverse rotation position to switch both poles of the starting motor 1 to reverse the starting motor 1.

In the above configuration, when starting the engine, first, when the engine is normally rotated, the switching switch 9
2 is switched to the normal rotation position as shown in FIG. 2, the relay R2 is energized and the contact r2 is connected, the starting motor 1 is normally rotated and the engine is normally rotated. When the engine rotates, the detection device 25 operates to generate an electric signal to cut off the contact of the rotation detection relay R1 and cut off the relay R2 to make the contact r.
2 shuts off and the starting motor 1 stops, but the engine continues to rotate normally. Even if the switching switch 9 is erroneously switched to the reverse position during this time, the starter motor 1 does not rotate in the opposite direction because the rotation detection relay R1 is activated and cut off while the engine is rotating.

When the switching switch 9 is switched to the stop position, the stop contact 2
9 is connected to short-circuit the primary circuit 17 and the secondary circuit 19
The discharge of the spark plug 21 stops, the engine stops, and the rotation detection relay R1 returns to the connected state.

When the switching switch 9 is switched to the reverse rotation position as shown in FIG. 3 when reversing the engine, the relay R2 is energized and the contact r2 is connected, and at the same time, the reverse rotation switching contact 31 is connected and the forward / reverse switching relay 3 is connected. Is switched to the reverse rotation position, the starting motor 1 is rotated in reverse, and the engine is rotated in reverse. When the engine rotates, the detection device 25 operates to generate an electric signal to cut off the contact of the rotation detection relay R1 to cause the relay R2.
Is cut off, the contact r2 is cut off, and the starting motor 1 is stopped, but the engine continues to rotate in the reverse direction. When the switching switch 9 is switched to the stop position, the engine is stopped as described above, the rotation detection relay R1 returns to the connected state, the reverse rotation switching contact 31 is cut off, and the forward / reverse rotation switching relay 3
Returns to the original normal posture.

The switching switch 9 is not limited to the toggle type and the push button type as long as it can hold each position when switching to three positions.

[Effect of device]

According to the present invention, the forward rotation, the reverse rotation of the starting motor and the stop of the engine can be switched and operated by one set of switches, and a separate stop switch is not required.
Further, even if the switching switch is erroneously operated while the engine is rotating, it will not rotate in the opposite direction.

[Brief description of drawings]

FIG. 1 is an explanatory view of an electric circuit of one embodiment of the present invention, FIG.
FIG. 3 is an explanatory diagram of an electric circuit at another switching position. 1 ... Starting motor, 9 ... Switching switch 17 ... Primary circuit, 25 ... Detecting device 28 ... Stopping device

Claims (1)

[Scope of utility model registration request] 1. A forward / reverse engine having a forward / reverse switchable starter motor, wherein the starter motor 1 is driven by a switching switch 9 which switches between normal, stop, and reverse positions and holds the respective positions. An electric circuit is switchably provided, and at the time of forward rotation and reverse rotation, a detection device 25 that detects the rotation speed of the engine and shuts off the electric circuit of the starting motor 1 is provided, and at the stop position, the primary circuit 17 of the ignition circuit is short-circuited. A starting device for an engine for forward and reverse rotation, which is provided with a stopping device 28 for controlling.