JPH0412169A - Starter switch - Google Patents

Abstract

PURPOSE:To dispense with an electromagnetic clutch, promote miniaturization, and reduce electric current consumption, by constituting a starter switch out of an earth short circuit switch, an electric motor, a sun gear, a planet gear, a driven gear, and a carrier. CONSTITUTION:When a key switch is closed and a drive shaft 41 is rotated with an electric motor, a planet gear 6 is intended to rotate in the (b) direction through a sun gear 5. But the planet gear 6 is not rotated by friction force given with two wave washers 81, a carrier 8 is turned in the (c) direction, and the gear 6 is revolved around the sun gear 5. When the planet gear 6 meshes with a driven gear 7, the planet gear 6 begins to rotate overcoming the friction force of the wave washers 81, and the driven gear 7 is also rotated in the (d) direction. Then, a rack gear 20 is moved, and a pinion is let mesh with a ring gear through a drive lever. Further, a movable contact 25 is closed with a fixed contact 26 through a clutch gear 21.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a starter switch using a drive motor as a power source.

[Prior Art] Conventionally, starter switches that use an electric motor as a power source, for example, open and close contacts provided between a power source and a starter motor, and also move a pinion forward toward the ring gear side of an internal combustion engine. Alternatively, an electromagnetic clutch is provided between the rotating body that moves in the axial direction while rotating and the drive shaft of an electric motor to connect and disconnect the rotating body and the drive shaft so as to move the body backward. 62-150073).

[Problems to be Solved by the Invention] However, since the starter switch described above uses an electromagnetic clutch, there is a problem in that it takes up space and the outer shell becomes large.

In addition, since the electromagnetic clutch passes current to generate magnetic force to connect the drive shaft and the rotating body to transmit rotational force, it is necessary to pass current during operation of the starter motor. Therefore, there was a problem that the current consumption was large.

Furthermore, since the electromagnetic clutch has a high current density, the temperature of the electromagnetic clutch increases quickly. For this reason,
If the starter motor is operated repeatedly, the suction force will be lost due to various adverse effects such as increased resistance due to temperature rise of the electromagnetic clutch. Therefore,
It no longer functions as an electromagnetic clutch, and there is a possibility that the starter switch may malfunction.

SUMMARY OF THE INVENTION An object of the present invention is to provide a starter switch that can be miniaturized, can reduce current consumption, and does not malfunction even when the starter motor is repeatedly operated.

[Means for Solving the Problems] The starter switch of the present invention includes a first rotating body rotationally driven by a drive motor, and a first rotary body that is rotationally driven by a drive motor.
a second rotating body that is always connected to the rotating body and revolves around the first rotating body; and a second rotating body that is disposed apart from the first rotating body and the second rotating body and connected to the second rotating body. a third rotating body that is rotationally driven by the second rotating body, and a restraining means that restrains the rotational movement of the second rotating body only when the second rotating body and the third rotating body are separated from each other. a connecting means for causing the second rotating body to revolve around the first rotating body and connecting the second rotating body to the third rotating body; A technical means is adopted that includes a control means that opens and closes a contact provided between the engine and the starter motor, and also moves the binion forward or backward toward the ring gear side of the internal combustion engine.

[Operation] When the first rotating body is rotationally driven by the drive motor, the second rotating body, which is always connected to the first rotating body, tries to rotate in a direction opposite to the rotational direction of the first rotating body. However, since the second rotating body and the third rotating body are still separated from each other, the rotational movement of the second rotating body is restrained by the restraining means. For this reason, the second rotating body is configured such that the second rotating body revolves around the first rotating body in the rotational direction of the first rotating body by the connecting means, and the third rotating body rotates around the first rotating body in the rotational direction of the first rotating body.
Connect to rotating body.

The third rotating body connected to the second rotating body is rotationally driven by the second rotating body as the second rotating body rotates. Therefore, it becomes possible to drive the control means without using an electromagnetic clutch.

The control means advances the pinion toward the ring gear of the internal combustion engine and meshes with the ring gear, closes the contact provided between the power source and the starter motor, and energizes the starter motor, thereby causing the starter motor to rotate. to rotate the pinion and start the internal combustion engine.

Further, when the rotation of the drive motor stops, the pinion gear retreats from the ring gear side, so the third rotating body is driven in the opposite direction by the control means. At this time, the third rotating body is
It rotates in the opposite direction to when it is rotationally driven by the second rotating body.

Therefore, since the second rotating body receives a rotational force in the opposite rotational direction from the third rotating body, the second rotating body revolves in a direction away from the third rotating body by the coupling means. Therefore, since the second rotating body and the third rotating body are separated, the drive motor is not driven to rotate in the opposite direction.

[Effects of the Invention] Since an electromagnetic clutch is not used in the starter switch, the outer shell can be made smaller without taking up space, so the starter switch can be made smaller. Furthermore, since current consumption can be reduced, the capacity of the power supply can be reduced.

Then, the rotational force of the drive motor is applied to the first rotating body and the second rotating body.
Since the temperature is reliably transmitted to the third rotating body via the rotating body, there is no temperature rise even if the starter motor is repeatedly operated.
The starter switch does not malfunction.

[Embodiment] A starter switch of the present invention will be explained based on an embodiment shown in FIGS. 1 to 7.

1 to 4 are diagrams showing the overall configuration of a starter switch.

The starter switch 1 engages a pinion (not shown) to which the rotation of the armature 11 of the starter motor is transmitted to a ring gear (not shown) of the internal combustion engine, and also connects the armature 11 of the starter motor with a battery 12 as a power source. It controls energization and energization M.

This starter switch 1 includes a controller III2, an earth short switch 3, an electric motor 4, a sun gear 5, a planetary gear 6, a driven gear 7, and a carrier 8.

The control mechanism 2 includes a rack gear 20, a pinion drive mechanism (not shown), a rack gear 21, and a contact opening/closing mechanism 22.The rack gear 20 has a plurality of teeth 23 that are always meshed with the driven gear 7 in the axial direction They are lined up. This rack gear 20 drives the pinion drive mechanism, and moves to the left in the figure when the driven gear 7 rotates to the right in the figure.

The pinion drive mechanism is composed of a drive lever (not shown), a return spring (not shown), etc., and when the rack gear 20 moves to the left in the drawing, it slides in the axial direction on the outer circumference of the shaft of the armature 11 of the starter motor. This device pushes out the movably arranged ring gear towards the ring gear side of the internal combustion engine.

The rack gear 21 has a plurality of teeth 24 arranged in an axial direction that always mesh with the driven gear 7. This rack gear 21 drives the contact opening/closing mechanism 22, and moves to the right in the figure when the driven gear 7 rotates to the right in the figure.

The contact opening/closing mechanism 22 includes a movable contact 25, a fixed contact 26, a contact spring 27, and a return spring 28.
It consists of

The movable contact 25 is slidably connected to the outer periphery of the right end of the rack gear 21 in the drawing, and reciprocates in the axial direction as the rack gear 21 moves in the axial direction.

One end of the fixed contact 26 is connected to the key switch 9, and the other end is connected to the armature 11 of the starter motor.

When the fixed contact 26 is closed by the movable contact 25, current is supplied to the armature 11 of the starter motor.

When the fixed contact 26 is opened by the movable contact 25, the supply of current to the armature 11 of the starter motor is interrupted.

The contact spring 27 applies contact pressure to the fixed contact 26 to the movable contact 25 when the movable contact 25 closes the fixed contact 26.

In the return spring 28, the movable contact 25 is connected to the fixed contact 2.
When the rack gear 21 moves to the left in the figure when the contact 6 is closed, the movable contact 25 is moved away from the fixed contact 26.

The earth short circuit switch 3 has a movable contact 31 and a fixed contact 32.
and a return spring 33.

The movable contact 31 is driven by the carrier 8 and is connected between the armature 11 of the starter motor and the fixed contact 26 of the contact opening/closing mechanism 22 . Fixed contact 32 is connected to ground. The return spring 33 urges the movable contact 31 in a direction away from the fixed contact 32.

The electric motor 4 is a drive motor of the present invention, and for example, a multi-motor is used. This electric motor 4 is connected to a battery 12 via a key switch 9, and when energized, a drive shaft 41 rotates in the direction of arrow a to rotationally drive the sun gear 5.

The sun gear 5 is a first rotating body of the present invention, and is disposed around the outer periphery of the front end of the drive shaft of the electric motor 4, and is rotatably supported by the carrier 8. This sun gear 5 has a plurality of teeth 51 formed all around its outer peripheral surface, and when driven by the electric motor 4 in the direction of arrow a, rotates the planetary gear 6 in the direction indicated by the arrow.

The planetary gear 6 is a second rotating body of the present invention, is rotatably supported by the carrier 8, and revolves around the sun gear 5 with the drive shaft 41 of the electric motor 4 as the center. This planetary gear 6 has a plurality of tooth portions 5 of the sun gear 5 over the entire circumference of the outer peripheral surface.
A plurality of tooth portions 61 are formed that always mesh with the tooth portion 1.

The driven gear 7 is a third rotating body of the present invention, and is disposed at a position away from the sun gear 5 and the planetary gears 6 and within the revolution range of the planetary gears 6.

This driven gear 7 has a plurality of teeth 71 that always mesh with the plurality of teeth 61 of the loose gear 6, a plurality of teeth 72 that always meshes with the plurality of teeth 23 of the rack gear 20, and a plurality of teeth 72 that always mesh with the plurality of teeth 23 of the rack gear 20. It has a plurality of teeth 73 that always mesh with the plurality of teeth 24, and rotates around a rotation axis 74.

Further, the diameters of the plurality of teeth 71 , the plurality of teeth 72 , and the plurality of teeth 73 are made smaller in the order of the plurality of teeth 71 , the plurality of teeth 72 , and the plurality of teeth 73 . In addition, the driven gear 7 has a plurality of tooth portions 71 that correspond to the plurality of tooth portions 61 of the planetary gear 6.
Only when the rack gears 20 and 21 are in mesh with each other, the planetary gears 6 are driven to shift the axial position of the rack gears 20 and 21.

The rotating shaft 74 is rotatably supported by a fixed member (not shown).

The carrier 8 is a connecting means of the present invention, and has two wave washers 81, and is composed of a plurality of side walls 82, 83 and a rotating shaft 84.

The carrier 8 rotates the planetary gears 6 around the sun gear 5 in the direction of arrow C around the drive shaft 41, and has a plurality of toothed parts 6.
1.71 This is for interlocking the spacers.

Further, the carrier 8 rotatably supports the drive shaft 41 and rotation shaft 84 of the electric motor 4, and also rotatably arranges the sun gear 5 and the planetary gears 6 between the plurality of side walls 82 and 83. . A protrusion 85 for driving the movable contact 31 of the earth shorting switch 3 is formed at the upper end of the carrier 8 in the drawing. When the protrusion 85 contacts the movable contact 31, it overcomes the biasing force of the return spring 33 and moves the movable contact 31 toward the fixed contact 32.

A planetary gear 6 is fixed to the outer periphery of the rotating shaft 84.

The two wave washers 81 are restraining means of the present invention, and are respectively disposed between the plurality of side walls 82 and 83 and the planetary gear 6, and are arranged between the plurality of tooth portions 61 of the planetary gear 6 and the plurality of driven gears 7. Frictional force is applied to the planetary gear 6 to restrain rotation of the planetary gear 6 when the teeth 71 are not in mesh with each other.

The operation of the starter switch 1 of this embodiment will be explained based on FIGS. 1 to 7.

By closing the key switch 9, the electric motor 4
is energized and the drive shaft 41 rotates. This rotation of the drive shaft 41 causes the sun gear 5 to rotate in the direction of arrow a, and the planetary gear 6
Try to rotate it in the direction of the arrow. However, as shown in FIGS. 1 and 2, the plurality of teeth 6 of the planetary gear 6
1 and the plurality of teeth 71 of the driven gear 7 are not in mesh with each other,
In other words, when the planet gear 6 is in a free state, the planet gear 6 has 2
Frictional force is applied between the carrier 8 and the plurality of side walls 82, 83 by the two wave washers 81. Therefore, the planetary gear 6 does not rotate, and the carrier 8 rotates around the drive shaft 4.
1 in the direction of arrow C, and the planetary gear 6 revolves around the sun gear 5.

Due to the pivoting movement of the carrier 8, the planetary gear 6 comes into contact with the driven gear 7, as shown in FIGS. 3 and 5, and the plurality of teeth 61, 71 mesh with each other.

When the planetary gear 6 contacts the driven gear 7, the carrier 8 cannot rotate around the drive shaft 41 anymore.

Moreover, the plurality of teeth 61 of the planetary gear 6 are always connected to the sun gear 5.
Since the planetary gear 6 is engaged with the plurality of teeth 51 of the sun gear 5, the planetary gear 6 receives the rotational force from the sun gear 5, overcomes the frictional force of the two wave washers 81, and starts rotating.

Therefore, the rotation of the sun gear 4 in the direction of the arrow a is transmitted through the rotation of the planetary gear 6 in the direction of the arrow A, and then as the rotation of the driven gear 7 in the direction of the arrow D. For this reason, a plurality of tooth portions 72 .
73 also rotates in the direction of arrow d.

At this time, the rack gear 20, in which the plurality of teeth 23 are constantly engaged with the plurality of teeth 72, is driven to the left in the figure, and the drive lever pushes the pinion toward the ring gear of the internal combustion engine. For this reason, it gets caught in the pinion or ring gear.

Further, the rack gear 21, in which the plurality of teeth 24 are always engaged with the plurality of teeth 73, is driven rightward in the figure, and the movable contact 25 moves toward the fixed contact 26, so that the movable contact 25 closes the fixed contact 26. Therefore, the armature 11 of the starter motor is energized, so the armature 11 rotates, rotates the pinion, and starts the internal combustion engine.

Note that at this time, the planetary gear 6 is pressed against the driven gear 7 because a force acting on the carrier 8 causes it to turn in the direction of arrow C due to the frictional force of the wave washer 81 from the planetary gear 6 . Furthermore, in the engaged state, the sixth
As shown in the figure, a reaction force of arrow G1 acts from the sun gear 5 to the planet gear 6, and moreover, from the driven gear to the planet gear 6, a reaction force acts on the planet gear 6.
A reaction force of arrow G2 is acting on the force. Therefore, the horizontal component G of the resultant force G of the reaction force of arrow G1 and the reaction force of arrow G2
O causes the planetary gear 6 to be pressed against the driven gear 1. Therefore, when the plurality of teeth 61 of the planetary gear 6 and the plurality of teeth 71 of the driven gear 7 are in mesh with each other, the planetary gear 6 and the driven gear 7 do not separate.

When the key switch 9 is opened by starting the internal combustion engine when the plurality of teeth 61 of the planetary gear 6 and the plurality of teeth 71 of the driven gear 7 are in mesh as shown in FIG. , when the electric motor 4 is de-energized, the drive shaft 4
1 stops rotating.

At this time, the drive lever is returned to the initial position by the reaction force of the return spring, so the rack gear 20 moves to the right in the figure. At the same time, the rack gear 21 moves to the left in the figure due to the reaction force of the return spring 28. Therefore, as shown in FIG. 7, the driven gear 7 receives rotational force in the direction of arrow e from the plurality of teeth 72.73 that are always meshed with the plurality of teeth 23.24 of the rack gear 20.21. , the driven gear 7 rotates in the direction of arrow e.

Then, the plurality of teeth 61 of the planetary gear 6 and the driven gear 7 still remain.
The driven gear 7 is in mesh with the multiple teeth 11 of the driven gear 7
Is it play? An attempt is made to rotate gear 6 in the direction of arrow f. However, since a frictional force is applied to the carrier 8 via the wave washer 81 on the planetary gear 6, the planetary gear 6 does not rotate and the carrier 8 rotates in the direction of arrow g about the drive shaft 41. . Therefore, since the planetary gear 6 is separated from the driven gear 7, the rotational force of the driven gear 7 in the direction of arrow e is not transmitted to the sun gear 5.

Further, when the planetary gear 6 separates from the driven gear 7 in this way, the protrusion 85 of the carrier 8 moves the movable contact 31 of the earth shorting switch 3 to the return spring 33, as shown in FIGS. 4 and 7. The fixed contact 32 is closed by overcoming the biasing force of the contact 32 and pressing it to one side (as shown in the figure).

Therefore, since a ground short circuit is configured in the armature 11 of the starter motor, the current due to the back electromotive force generated in the starter motor quickly flows to the ground via the ground short circuit switch 3, and the armature 11 of the starter motor Inertial rotation can be stopped instantly.

As described above, the planetary gear 6 and the driven gear 7 can be engaged and disengaged according to the opening and closing of the key switch 9 without using an electromagnetic clutch in the starter switch 1. For this reason,
Since the outer shell can be made smaller without taking up space, the starter switch 1 can be made smaller. Further, since the current consumption can be reduced by the amount consumed by the electromagnetic clutch, the capacity of the battery 12 can be reduced.

Furthermore, since the rotational force is transmitted from the drive shaft 41 of the electric motor 4 to the driven gear 7 via the sun gear 5 and planetary gear 6, there is no temperature rise even if the armature 11 of the starter motor is repeatedly operated. However, the starter switch 1 will not malfunction.

(Modification) In this embodiment, the driven gear and the control PI structure are directly connected, but the driven gear and the control mechanism may be connected indirectly.

In this embodiment, a wave washer is disposed between the planetary gear and the carrier as a restraining means, but a spring member such as a leaf spring or synthetic rubber may be disposed between the planetary gear and the carrier. Further, as the restraining means, a locking means that locks into a locking portion such as a groove, a large part, or a protrusion formed on the planetary gear may be used.

However, the locking means is limited to one that releases the locking portion so that the planetary gear can move in the rotational direction when the planetary gear and the driven gear mesh.

Further, the direction of rotation of the connecting means may be opposite to that in this embodiment, but the directions of rotation of the first rotating body and the second rotating body are opposite to that in this embodiment.

In this embodiment, the pinion drive mechanism and the contact opening/closing mechanism are each driven by two rack gears, but both the pinion driving mechanism and the contact opening/closing tJ & lateral may be driven by one rack gear.

[Brief explanation of drawings]

1 to 7 show an embodiment of the starter switch of the present invention. Figure 1 is a schematic diagram showing the overall configuration of the starter switch;
2 is a sectional view taken along the line 1-A in FIG. 1, FIGS. 3 and 4 are electrical circuit diagrams of the starter switch, and FIGS. 5 to 7 are explanatory diagrams of the operation. In the figure 1... Starter switch 2... Control mechanism (control means) 4... Electric motor (drive motor) 5.
・Sun gear (first rotating body) 6... Planetary gear (second
Rotating body) 7... Driven gear (third rotating body) 8.
...Carrier (connection means) 11...Starter motor armature 12...Battery (power supply) 81...
Wave washer (restraint means) 1 to 5 figures 1'7! XI Figure 6

Claims (1)

[Scope of Claims] 1) (a) a first rotating body rotationally driven by a drive motor; (b) a second rotating body always connected to the first rotating body and revolving around the first rotating body; a rotating body; (c) the second rotating body is disposed apart from the first rotating body and the second rotating body, and only when connected to the second rotating body;
a third rotating body rotationally driven by the rotating body; (d) a restraining means for restraining the rotational movement of the second rotating body only when the second rotating body and the third rotating body are separated; , a connecting means for causing the second rotating body to revolve around the first rotating body and connecting the second rotating body to the third rotating body; (e) being driven by the rotational movement of the third rotating body; A starter switch comprising control means for opening and closing a contact provided between a power source and a starter motor, and for moving a pinion forward or backward toward a ring gear of an internal combustion engine.