JPS60237163A - Controller for starter motor - Google Patents

Abstract

PURPOSE:To reduce the impact torque due to the rotary force of pinion of a starter motor by maintaining good gearing between the pinion and a ring gear through an electromagnetic moving means for pinion and switching means for starter motor. CONSTITUTION:A starter motor is provided with a pinion 5 to be geared with a ring gear 6 for driving an internal-combustion engine, a starter motor 30 for rotating the pinion 5 and electromagnetic moving means comprised of a rod 11 for moving the pinion 5 axially, a stator core 13, an attraction coil 15a, a holding coil 15b and a movable core 21. Power is fed to the starter motor 30 at the position near to the contacting position between the pinion 5 and the ring gear 6 and to temporarily interrupt power supply to said motor 30 when the pinion 5 will start to be geared with the ring gear 6. When the pinion 5 will be geared almost completely, power is fed again through switching means comprised of a fixed contact 17, first movable contact 23, second movable contact 24 and third movable contact 25.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method and apparatus for controlling a scooter motor used in a starter motor for driving an internal combustion engine.

[Conventional technology]

As shown in Japanese Utility Model Application Publication No. 56-34046, the conventional type moves a pinion via a plunger when a magnetic switch is energized, and prevents rotation of the pinion until the pinion comes into contact with the ring gear. , which then rotates the pinion and engages the ring gear.

However, in the conventional system described above, when the pinion comes into contact with the ring gear, and at this point the pinion rotates and meshes with the ring gear, the impact torque due to the rotational force of the pinion is directly transmitted to the ring gear, and this impact torque causes There is a problem in that it is necessary to increase the strength of the rotation transmission line.

[Purpose of the invention]

An object of the present invention is to maintain good meshing properties between the pinion and the ring gear, and to reduce the impact torque caused by the rotational force of the pinion when the pinion meshes with the ring gear.

(Structure of the Invention) A first invention is a starter that rotates a pinion and meshes with a ring gear of an internal combustion engine by energizing a starter motor. The starter motor is temporarily de-energized when the pinion starts to engage with the ring gear, and then the starter motor is energized again when the pinion is almost completely engaged with the ring gear. .

A second invention is a Stark comprising a pinion that meshes with a ring gear that drives an internal combustion engine, a starter motor that rotates the pinion, and electromagnetic moving means that moves the pinion in an axial direction, in which the pinion is connected to the ring gear. When the pinion starts to engage with the ring gear, power is temporarily cut off to the starter motor, and then when the pinion is almost completely engaged with the ring gear, the starter motor is turned on. This configuration includes a switch means for re-energizing.

〔Example〕

The present invention will be described below with reference to embodiments shown in the drawings.

As in the first embodiment shown in FIGS. 1 and 2, a cylindrical clutch inner 2 is connected with a helical spline to the outer periphery of a pinion shaft 1, and a roller 3 is connected to the outer periphery of the clutch inner 2. A thalassocia outer 4 having teeth 4a formed on its outer periphery is attached via the . Further, a pinion return spring 2a is installed between the pinion shaft 1 and the clutch inner 2. A pinion 5 that meshes with a ring gear 6 on the internal combustion engine side is fixed to one end of the pinion shaft 1, and a cylindrical hollow portion 1a is formed at the other end. Further, a pinion spring 7 is installed between the pinion 5 and the clutch inner 2. The pinion shaft 1 is held in a housing 9 by a bearing 8 provided at the outer peripheral end of the clutch inner 2.

A magnetic switch 100 is arranged on the side of the pinion shaft 1 opposite to the pinion 5. To explain this magnetic switch 100, a cylindrical load 11 is inserted into the hollow part 1a of the pinion shaft 1 via a ball 10. A collar portion 11a is arranged. A cylindrical fixed iron core 13 is connected to the end surface side of the hollow portion 1a of the pinion shaft 1 through a U-shaped yoke 12 to the housing 9.
is retained. Further, a bobbin 14 made of insulating resin or the like is arranged on the inner periphery of the yoke 12.
4 has an attraction coil 15a forming an electromagnetic coil 15 from the inside.
, a holding coil 15b having one end grounded is wound thereon.

Further, an insulating plate 16 is provided on the end surface of the yoke 12 on the side opposite to the pinion 5.
A fixed contact 17 of an L-shaped plate is arranged through the L-shaped plate. Furthermore, this fixed contact 17 is fixed to the housing 9 via an insulator 18 with a bolt 19 and a nut 20, and the bobbin 14 is held via the fixed contact 17 with a bolt 19 and a nut 20. There is. A cylindrical movable core 21 into which the rod 11 is inserted is disposed on the inner peripheral side of the bobbin 14 so as to be movable in the axial direction. Further, a step portion 21a is formed on the inner peripheral surface of the movable iron core 21, and this step portion 21a and the collar portion 11a of the rod 11
A movable core return spring 22 whose load is smaller than the set load of the pinion spring 7 is installed between the pinion spring 7 and the movable core return spring 22 .

The attraction coil 15a, the holding coil 15b, the fixed iron core 13, the movable iron core 21, and the rod 11 constitute an electromagnetic moving means. Further, on the side of the movable iron core 21 opposite to the fixed iron core 13, there are first and second semicircular planar parts 23a facing each other,
23b, a first movable contact 23 having a U-shaped cross section;
The third movable contact 23 facing this first movable contact 23. A second portion having a U-shaped cross section and having a fourth semicircular plane portion 24a, 24b.
The movable contacts 24 are arranged insulated from each other. Further, the first movable contact 23 and the second movable contact 24 are arranged at positions facing each other. And the first and second
A disk-shaped third movable contact 25 is arranged inside the U-shape of the movable contacts 23 and 24. In addition, a support portion 26 whose one end is fixed to the movable iron core 21 and extends in the axial direction from the one end
b, and a flat portion 2 from which the other end of this support portion 26 extends in the radial direction.
6a and the supporting portion 2 of the spring holding member 26.
6b is arranged on the inner circumferential side of the first and second movable contacts 23.24, and the flat part 26 of the spring holding member 26
A is restricted from moving in the axial direction on the side opposite to the pinion 5 by a cover 27 provided on the housing 9. and the second and fourth flat parts 2 of the first and second movable contacts 23 and 24.
3b, 24b and the flat part 26a of the spring holding member 26
A first spring 28 is installed between the
The movable contact 25 and the flat part 26 of the spring holding member 26
A second spring 29 is installed between the spring 29 and the spring 29a. The fixed contact 17, the first movable contact 23, the second movable contact 24, and the third movable contact 25 constitute a switch means.

Furthermore, the armature motor 30 that is driven when the magnetic throat switch is closed is located at the center of the armature core 31.
The armature shaft 32 is attached. A small gear 33 is provided at one end of the armature shaft 32, and an idle gear 34 that meshes with the small gear 33 and decelerates the rotation of the armature shaft 32 is rotatably provided in the housing 9. There is. Furthermore, this idle gear 34 is arranged so as to mesh with teeth 4a formed on the outer periphery of the flannel chia rough 4.

One fixed contact 17 is connected to the positive terminal of the battery 35, and the other fixed contact 17a is connected to the attraction coil 15a and to the starter motor 30. In addition, the attraction coil 15a and the holding coil 15
A scooter switch 36 serving as an open/close switch is connected between the connection point with b and the positive terminal of the battery 35.

Next, the operation of the above configuration will be explained.

As shown in FIGS. 2 to 7, the starter switch 36
When closed, current flows through the battery 35 to the holding coil 15b and the attraction coil 15a, which constitute the electromagnetic coil 15, to generate excitation magnetic flux. And with this excitation magnetic flux,
The movable core 21 moves toward the ring gear 6, and the pinion 5 is moved toward the ring gear 6 as shown between AB in FIG. 3 via the movable core return spring 22, rod 11, ball 10, and pinion shaft 1. Here, in FIG. 3, 6a is a tooth, 6b is a tooth groove, and 6C is a chamfer. Further, as the movable core 21 and the spring holding member 26 fixed to the movable core 21 move, the first and second movable cores 23 and 24 and the third movable contact 25 also move, respectively. The spring force of the second springs 28 and 29 moves it toward the ring gear 6.

When the pinion 5 comes into contact with the ring gear 6 at point B in FIG. 3 and in FIG.
It is arranged in a U-shape of 3.24. Moreover, the fixed contacts 172 and 17, respectively, and the first. Third plane part 23a
, 24a, and this gap A is the third
The movable contact 25 and the second. This is equal to or larger than the gap B between the fourth flat portions 23b and 24b.

Further, the movable iron core 21 is pulled toward the ring gear 6 by the excitation magnetic flux of the electromagnetic coil 15, but the pinion 5
is in contact with the ring gear 6 and cannot be moved. Then, as the movable core return spring 22 is bent, the movable core 21 and the spring holding member 26 move toward the ring gear 6, and the first. The second movable contact 23.24 also moves in the axial direction. Further, since the third movable contact 25 is restricted from moving in the axial direction by the rod 11, the third movable contact 25 is restricted from moving in the axial direction. By moving the second movable contact 23°24, the third movable contact 25 moves to the second. Fourth
The ring gear 6 side end surfaces of the flat portions 23b and 24b of the ring gear 6 come into contact with each other. Here, when the gap A and the gap B shown in FIG. 4 are equal, the third movable contact 25 is connected to the second movable contact. fourth plane part 23b,
24b, when the first. Third plane portion 23a, 2
4a abut on fixed contacts 17a and 17, respectively. Further, when the gap A is larger than the gap B, the third movable contact 25 first contacts the second and fourth flat parts 23b and 24b, but still contacts the first and third flat parts 23a.

23b is a fixed contact and does not contact 17a, 17.

However, the excitation magnetic flux of the electromagnetic coil 15 bends the pinion spring 7 via the third movable contact 25, the rod 11, the hole 10, and the pinion shaft 1, and moves the third movable contact 25 toward the ring gear 6. At the same time, the first and second movable contacts 23 and 24 are moved toward the ring gear 6, and the first and third flat parts 23a and 24a are brought into contact with the fixed contacts 17a and 17, respectively.

And the first. When the third flat parts 23a, 24a abut the fixed contacts 17a, l'l, respectively, the battery 35
Thus, current is applied to the starter motor 30 via the fixed contact 17, the second movable contact 24, the third movable contact 25, the first movable contact 23, and the fixed contact 17a, and the starter motor 30 is rotated. Then, the rotation of the armature shaft 32 is reduced through the small gear 33, the idle gear 34, the clutch outer 4, the roller 3, and the clutch inner 2, and the rotation of the armature shaft 32 is transmitted to the pinion 5. Also, while rotating the pinion 5, the electromagnetic coil 1
By moving the pinion 5 toward the ring gear 6 by the excitation magnetic flux of the pinion 5, the pinion 5 is meshed with the ring gear 6.

Next, due to the rotation of the pinion 5, the pinion 5 engages along the chamfer 6c of the teeth 6a of the ring gear 6 between the CDs in FIG.
moves in the axial direction toward the ring gear 6, so the pinion shaft 1, ball 10, and rod 11 move toward the ring gear 6, and the third movable contact 25 also moves, causing the second and fourth flat portions 23b, 24b to move. The movable contact 25 is separated from the
Disconnect the battery 35 and starter motor 30.

Therefore, the armature shaft 32 stops rotating, and the pinion 5 stops rotating via the small gear 33, the idle gear 34, and the clutch outer 4. Therefore, at point D in FIG. 3, the rotation of the pinion 5 causes the tooth 5a of the pinion 5 to enter the tooth groove 6a of the ring gear 6 and hit the end surface of the tooth 6a, and the energy of the rotation of the pinion 5 conversely causes the pinion 5 to In this invention, when the pinion 5 starts to mesh with the ring gear 6, the rotation transmission is transmitted to the clutch inner 2, roller 3, and clutch outer 4 through
Since the rotation of the pinion 5 is stopped, the rotational energy of the pinion 5 is lost, and there is no need to reinforce the rotation transmission system.

Next, at a point where the tooth 5a of the pinion 5 contacts the end surface of the tooth 6a of the ring gear 6, which is point D in FIG. 3, as shown in FIG. is pulled by the ring gear 6 side, and the pinion 5
Due to the movement of the ring gear 6 side, the pinion shaft 1,
The ball 10 and the rod 11 move, and the third movable contact 2
5 is pushed by the second spring 29 and comes into contact with the first and third flat parts 23a and 24a. Here, the first and second
of the movable contacts 23, 24. Third plane portion 23a, 2
4a remain in contact with fixed contacts 17a and 17, respectively.

Then, the third movable contact 25 is connected to the first movable contact 25. Third plane part 2
3a, 24a, the battery 35 causes the fixed contact 17, the second movable contact 24, the third movable contact 25,
A current is applied to the starter motor 30 via the first movable contact 23 and the fixed contact 17a. Then, the armature shaft 32 is rotated, and this rotation is decelerated via the small gear 33, idle gear 34, clutch outer 4, roller 3, and clutch inner 2, and the pinion 5, which is fully engaged with the ring gear 6, is rotated. let Furthermore, the rotation of the pinion 5 also rotates the ring gear 6, driving the internal combustion engine.

After the internal combustion engine is completely driven, when the starter switch 36 is turned off, no current flows through the electromagnetic coil 15, the movable core 21 is returned by the pinion return spring 2a, and the pinion 5 is also separated from the ring gear 6 and returned to its original position. state and completes starting of the internal combustion engine.

In addition, as in the second embodiment shown in FIGS. 8 to 10,
A protrusion 2b is formed on the outer periphery of the clutch inner 2.

A limit switch 42 is mounted within the housing 9, and an operating rod 43 that protrudes from the limit switch 42 toward the clutch inner 2 and opens and closes the limit switch 42 is provided on the limit switch 42. Also,
One end of a relay coil 45 is connected to one end of the limit switch 42, and the other end is connected to ground.

A second movable iron core 46 having a fourth movable contact 47 at one end is arranged at the center of this relay coil 45. Further, a second fixed contact 48 that comes into contact with the fourth movable contact 47 is provided between the fixed contact 17 and the positive electrode of the battery 35 . The outer periphery of the movable iron core 21, which has a movable contact 50 in contact with the fixed contact 17, 17a at one end, has an attraction coil 15a and a holding coil 1 whose one end is grounded.
5b is wrapped. Further, a starter switch 36 is connected between the connection point between the attraction coil 15a and the holding coil 15b and the positive terminal of the battery 35. moreover,
The suction coil 15a is connected to the starter motor 30. In addition, the movable iron core 21 of the magnetic switch 40
By this movement, the pinion 5 is moved toward the ring gear 6 via the lever 41.

Next, the operation of the second embodiment with the above configuration will be explained.

When the starter switch 36 is closed, current flows from the battery 35 to the attraction coil 15a and the holding coil 15b, causing the movable iron core 21 to move. Then rotate the lever 41,
The pinion 5 is moved to the vicinity where it contacts the ring gear 6, and the movable contact 50 is brought into contact with the fixed contacts 17a and 17, and the current from the battery 35 is transferred to the second fixed contact 48, the fourth movable contact 47, and the movable contact 50. via starter motor 3
0, and the pinion 5 is rotated by the rotation of the starter motor 30.

Next, as shown in FIG. 9, when the pinion 5 moves toward the ring gear 6 from the contact position with the ring gear 6, the protrusion 2b provided on the outer periphery of the clutch inner 2 causes the operating rod 43 of the limit switch 42 to is pushed up, and the limit switch 42 is closed. Then, the current from the pantry 35 flows through the relay coil 45, and the excitation magnetic flux of the relay coil 45 attracts the second movable iron core 46, separating the fourth movable contact 47 from the second fixed contact 48. As a result, the current from the battery 35 is cut off to the starter motor 30, the rotation of the starter motor 30 is stopped, and the rotation of the pinion 5 is stopped.

Furthermore, as shown in FIG. 10, when the pinion 5 is completely engaged with the ring gear 6, the operating rod 43 of the limit/7-toe switch 42 is moved from the protrusion 2b provided on the outer periphery of the clutch inner 2 to the outer periphery of the clutch inner 42. Then, the limit switch 42 is opened. Then, the current that has been flowing through the relay coil 45 is cut off, the movable core 46 returns to its original position, and the fourth movable contact 47 is brought into contact with the second fixed contact 48. Then, current from the battery 35 is applied to the starter motor 30 to rotate the starter motor 30, and when the pinion 5 is completely engaged with the ring gear 6, the pinion 5 can be rotated. Further, the rotation of the pinion 5 is applied to the ring gear 6 to drive the internal combustion engine. With the above configuration and operation, effects similar to those of the first embodiment can be obtained.

Furthermore, if the fixed contacts 17a and 17 are movably installed using springs, A≧ as shown in FIG. 4 of the first embodiment.
It is not necessary to set B, and in the case of A<B, the first and third flat parts 23a and 24a are initially set at the fixed contacts 17a and 17.
The fixed contacts 17a and 17 then move toward the ring gear 6 against the force of the spring, and the second and fourth flat parts 23b and 24b contact the third movable contact 25,
Stark motor 30 can be rotated.

〔Effect of the invention〕

As described above, in the present invention, the starter motor is energized in the vicinity where the pinion contacts the ring gear, the energization to the starter motor is temporarily cut off when the pinion starts to mesh with the ring gear, and then the pinion is almost in contact with the ring gear. Since the starter motor is energized again when the pinion is fully engaged, good meshing between the pinion and ring gear can be maintained, and the impact torque on the ring gear due to pinion rotation can be reduced, so it is necessary to increase the strength of the rotation transmission system. It has an excellent effect of being neutral.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of the first embodiment of the device of the present invention, FIG. 2 is a schematic partial cross-sectional configuration diagram of the above embodiment, and FIG. 3 is a longitudinal sectional view showing the movement of the pinion with respect to the ring gear of the above embodiment. , FIGS. 4 to 7 are partial cross-sectional schematic configuration diagrams showing the respective states of the pinion in the position relative to the ring gear in the above embodiment, FIG. 8 is an electrical connection diagram in the second embodiment of the device of the present invention, and FIG. 9 and Figure 10 is the second
FIG. 6 is a partially sectional front view illustrating each position of the pinion in the embodiment relative to the ring gear. 5... Pinion, 6... Ring gear, 30... Starter motor, 11, 13.15a, 15b, 21...
・Rod 1 fixed core, attraction coil, holding coil, movable core, 17, 23, 24, 25, which constitutes electromagnetic moving means.
...A fixed contact, a first movable contact, a second movable contact, and a third movable contact that constitute the switch means. Representative Patent Attorney Takashi Okabe Figure 1 Figure 2 Figure 3 bD Figure 5 Figure 6 Figure 7 0 Figure 8 Figure 9 Otsun

Claims (1)

Scope of Claims (11) In a starter that rotates a pinion and meshes with a ring gear of an internal combustion engine by energizing a starter motor, energizing the scooter motor is started near where the pinion comes into contact with the ring gear; A method for controlling a starter motor, in which the starter motor is temporarily de-energized when the pinion starts to mesh with the ring gear, and then the starter motor is energized again when the pinion almost completely meshes with the ring gear. 2) In a starter comprising a pinion that meshes with a ring gear that drives an internal combustion engine, a starter motor that rotates the pinion, and an electromagnetic moving means that moves the pinion in the axial direction, in the vicinity where the pinion abuts the ring gear. switch means for energizing the starter motor, temporarily cutting off energization to the stark motor when the pinion starts to mesh with the ring gear, and then energizing the starter motor again when the pinion almost completely meshes with the ring gear; A starter motor control device having: