JP2539084B2 - Magnetic shift type starter - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic shift starter for an engine, and particularly to prevent damage and damage to the teeth of the pinion and the ring gear when the ring gear and the pinion mesh with each other. The present invention relates to a magnetic shift starter suitable for.

[Prior Art] As a conventional technology of a magnetic shift starter for this type of engine, there is a technology described in Japanese Patent Publication No. 1-40224.

This prior art is based on the exciting coil, the plunger, the first and second
And a motor having an armature controlled by the magnetic switch to generate a low torque and a high torque, and a speed reduction mechanism for decelerating the rotation output from the armature and transmitting the rotation to the pinion. , A shift lever operated by the plunger to push the pinion into a meshing position with a ring gear for starting the engine.

Further, in the above-mentioned conventional technique, the electric power is supplied to the field coil of the armature of the motor in two stages, and low torque and high torque can be generated.

However, the gap l between the plunger and the shift lever
₁ (see the drawing of the publication), the kinetic energy stored while the plunger moves through the gap l ₁ acts on both end faces of the pinion and the ring gear when the pinion contacts the ring gear.

[Problems to be Solved by the Invention] Therefore, in the above-described conventional technique, when the pinion and the ring gear are in contact with each other, that is, when the teeth contact each other without the pinion and the ring gear meshing with each other, a large impact force acts on both teeth. There was a problem that the teeth were damaged or damaged.

In view of the above-mentioned problems of the prior art, an object of the present invention is to reduce the impact force at the time of contact between the pinion and the ring gear, avoid the collision of the pinion with the ring gear, and further the end portion of the shift lever on the action point side. An object of the present invention is to provide a magnetic shift starter capable of reducing the wear of the end surface of the pinion shaft hit by.

[Means for Solving the Problems] According to the present invention, a motor capable of outputting low torque and high torque and a pinion shaft movable in an axial direction are mounted, and a meshing position with respect to a ring gear for starting an engine via the pinion shaft. And a deceleration mechanism that decelerates the rotation of the motor and transmits the deceleration to the pinion, a plunger that can move parallel to the pinion shaft, and a motor that is sequentially closed as the plunger moves. A magnet switch having a first contact for driving the motor with a low torque and a second contact for driving the motor with a high torque, and a force point side end which is one end of the magnet switch is inserted into the plunger of the magnet switch. The end has an end on the side of the action point, and the pinion is placed in the meshing position with the ring gear via the pinion shaft. A shift lever that pushes forward and one end of which is hooked on a fixed member, the other end of which is hooked on the shift lever, and one side of the shift lever is normally brought into contact with the fixed member by elastic force while a magnet switch is used. When the plunger is moved, the shift lever is rotated with the contact portion between the one side portion of the shift lever and the fixed member as the first fulcrum portion, and the pinion shaft is pressed by the action point side end portion of the shift lever. In a magnetic shift starter equipped with a torsion spring, a position near the middle part of the shift lever,
A shaft stopper that is arranged at a distance from the first fulcrum part and sandwiches the shift lever and that forms a second fulcrum part is attached, and when the plunger is moved, the shift lever is moved to the first fulcrum part. It is configured to be movable between the second fulcrum portion, and when the shift lever rotates by the movement of the plunger with the first fulcrum portion as a fulcrum, the action point side end portion of the shift lever is with respect to the end surface of the pinion shaft. When the eccentric position decentered from the axial center position is pressed and the first contact is closed when the eccentric position is pressed, and the intermediate portion of the shift lever comes into contact with the second fulcrum portion by further movement of the plunger. , The shift lever rotates about the second fulcrum portion as a fulcrum, the end portion on the action point side of the shift lever presses the axial center position of the end face of the pinion shaft, and when the axial center position is pressed, the second contact point is moved. It is obtained by, characterized in that formed.

[Operation] In the present invention, the plunger of the magnetic switch operates the shift lever, and the shift lever pushes the pinion shaft to move the pinion to the meshing position with the ring gear.

Then, the spring pushes the shift lever to the preset first fulcrum portion, and at the initial stage of pushing the pinion shaft with the shift lever, the shift lever rotates at the first fulcrum portion and pushes the pinion shaft. . At this time, if the teeth of the pinion mesh with the teeth of the ring gear,
The shift lever rotates at the first fulcrum, continues to push the pinion shaft, and pushes the pinion against the ring gear to a predetermined meshing position determined by the moving amount of the plunger.

By the way, when pushing the pinion shaft with the shift lever and the teeth of the pinion do not mesh with the teeth of the ring gear, the end of the shift lever that is in contact with the end face of the pinion shaft is the fulcrum of rotation. Moves from the first fulcrum portion toward the second fulcrum portion, which is set at a predetermined interval, against the spring, and the shift lever further rotates at the second fulcrum point, so that the pinion is rotated by a necessary force. Push the shaft. During that time, low torque is output from the motor, the torque is decelerated and transmitted to the pinion, and the pinion decelerates and rotates with low torque to search for a meshing position with the ring gear. As a result, when the teeth of the pinion mesh with the teeth of the ring gear, the shift lever is pushed back from the second fulcrum portion to the first fulcrum portion by the action of the spring, and the shift lever rotates at the first fulcrum portion to rotate the pinion shaft. The pinion is pushed in to a predetermined meshing position with the ring gear via.

In this way, when the teeth of the pinion hit the teeth of the ring gear, the shift lever itself contacts the end face of the pinion shaft with the end on the action point side as the fulcrum of rotation, from the first fulcrum to the second fulcrum. The pinion shaft and the ring gear teeth can be prevented from being damaged or damaged because the pinion shaft is not pushed by an excessive force.

Further, according to the present invention, when the shift lever rotates about the first fulcrum and pushes the pinion shaft, the eccentric position is pushed with respect to the axial center position of the pinion shaft. Therefore, since the pinion shaft is pushed by the component force of the force applied to the pinion shaft by the shift lever, the pinion can be prevented from colliding with the ring gear by pushing the pinion shaft with a necessary and weak force.

On the other hand, when the shift lever rotates at the second fulcrum portion and pushes the pinion shaft, the axial center position of the pinion shaft is pushed. At the stage where the shift lever pushes the pinion shaft at the second fulcrum portion, the pinion shaft is rotating although the torque output from the motor is low and the speed is reduced. Therefore, if the shift lever continues to push the eccentric position of the pinion shaft, the peripheral speed acts on the contact portion between the shift lever and the pinion shaft,
An R-shaped recess due to wear occurs on the end surface of the pinion shaft. Therefore, at the stage where the shift lever rotates on the second fulcrum and pushes the pinion shaft, the axial center position of the pinion shaft is pushed, so that the wear of the end face of the pinion shaft due to the peripheral speed can be reduced. It will be possible.

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

1 to 6 show an embodiment of the present invention. FIG. 1 is a vertical sectional side view in an initial state, and FIG. 2 is a connection relation between a starter power supply, a key switch, and an internal circuit of a magnetic switch. 3 and 4 are operation explanatory views, and FIG. 5 is a partially enlarged view showing a state in which the shift lever rotates at the first fulcrum portion to push the eccentric position of the pinion shaft. FIG. 6 is a partially enlarged view showing a state in which the shift lever rotates at a second fulcrum and pushes the axial center position of the pinion shaft. Note that FIG. 7 is an explanatory diagram of an R-shaped recess that occurs when the shift lever rotates about the second fulcrum and pushes the eccentric position of the pinion shaft.

The magnetic shift starter of this embodiment has a first
As shown in the figure, the housing 22, the motor having the armature 1, and the pinion provided on the pinion shaft 30.
31, a mechanism for decelerating the rotation of the motor and transmitting the decelerated rotation to the pinion 31, an engine starting ring gear 32, a magnetic switch 9, and a plunger 11 of the magnetic switch 9 which operates the pinion shaft 30. Shift lever 23 that pushes in the direction, and shaft stopper 2 that is the first fulcrum portion 22a and the second fulcrum portion for this shift lever
It is configured with 1.

The armature 1 is arranged inside the housing 22. The armature 1 includes an armature shaft 2 having an armature gear 3, a yoke 4, and a pole core 5.
And a field coil 6 which is a field coil, and a brush 7.
And a commutator 8. The field coil 6 is, as shown in FIG. 2, an independent one-pole coil 6a.
And three-pole coils 6a, 6c, 6d connected in parallel with each other are connected in parallel with four-pole coils 6a to 6d.

The magnetic switch 9 is provided in the housing 22. The magnetic switch 9 includes a magnetic coil 10, a plunger 11, a first contact, a contact shaft 15, a contact pushing spring 16, a second contact, and a contact return spring 20. The magnetic coil 10 of the magnetic switch 9, as shown in FIG.
It has a series coil 10a connected to the key switch 34 and a shunt coil 10b. The series coil 1
0a is connected to the coils 6b, 6c, 6d of the field coil 6 which are connected in parallel with each other. The shunt coil 10
b is grounded. The plunger 11 is attracted by the electromagnetic force generated when the magnetic coil 10 is energized, and moves in the direction indicated by the arrow a in FIG. In addition, one end of the plunger 11 has a square hole 11 for receiving the end portion of the shift lever 23 on one side of the force point.
a is formed. The first contact is the plunger 11
Has a movable contact 12 mounted on the fixed side and fixed contacts 13 and 14 mounted on the fixed side member. One fixed contact 13 of the first contacts is connected to a battery 33 which is a starter power source, as shown in FIG. As shown in FIG. 2, the one fixed pole 14 of the field coil 6 is connected to the other fixed contact 14 of the first contact.
Therefore, the movable contact 12 of the first contact is fixed to the fixed contacts 13 and 14.
When the field coil 6 is closed by contacting it, the one-pole coil 6a of the field coil 6 is energized, and the brush 7 of the armature 1 is energized through this coil 6a. The contact shaft 15 is pushed by the plunger 11, moves in the direction of arrow a in FIG. 1, and is pushed back by the contact return spring 20. The second contact has a movable contact 17 attached to the contact shaft 15 and fixed contacts 18 and 19 attached to a member on the fixed side. One of the fixed contacts 18 of the second contacts is a battery as shown in FIG.
Connected to 33. The other fixed contact of the second contact
Three poles 6b, 6c, 6d of the field coil 6 connected in parallel with each other are connected to 19. As a result, when the movable contact 17 of the second contact contacts the fixed contacts 18 and 19 and closes, the three pole coils 6a, 6c and 6d are energized and the armature 1
The brush 7 is supplied with power.

The shaft stopper 21 which is the second fulcrum for the shift lever
Is a first fulcrum 22a set on the inner wall of the housing 22.
And a position separated by a distance L between them and fixed to the housing 22. Therefore, the second fulcrum portion is located at a distance L from the first fulcrum portion with the shift lever 23 interposed therebetween.

The shift lever 23 is housed inside the housing 22. The end portion of the shift lever 23 on the power point side is inserted into the square hole 11a formed at one end portion of the plunger 11 as described above. Further, the middle portion of the shift lever 23 has a first fulcrum 22a set on the inner wall of the housing 22 and the second fulcrum 22a.
The shift lever 23 is configured to rotate with one of the first and second fulcrums as a fulcrum of fulcrum. Further, the action point side end portion on the other end side of the shift lever 23 contacts the end face of the pinion shaft 30 and pushes the pinion 31 in the direction of arrow b shown in FIG. When the shift lever 23 rotates about the first fulcrum 22a, as shown in FIG. 5, the eccentric position with respect to the axial center position O of the pinion shaft 30 at the action point side end of the shift lever 23. When O'is pressed to rotate about the shaft stopper 21, which is the second fulcrum, as shown in FIG. 6, the shaft center position O of the pinion shaft 30 is reached at the end of the shift lever 23 on the operating point side, as shown in FIG. Is configured to press.

One end of the torsion spring 24 is a housing
It is hooked on a fixing member 22b fixed to 22, and the other end is hooked on an intermediate portion of the shift lever 23. The torsion spring 24 pushes the shift lever 23 toward the first fulcrum 22a and pulls the plunger 11 back to its original position.

The mechanism for reducing the rotation speed of the motor and transmitting it to the pinion 31 includes an armature shaft 2, an armature gear 3 provided on the armature shaft 2, a pinion clutch 25 which is a one-way clutch, and a clutch outer 26 of the pinion clutch 25.
A clutch gear 28 formed on the outer peripheral surface of the armature gear 3 and meshed with the armature gear 3, and a pinion shaft 30 inserted into the clutch inner 27 of the pinion clutch 25 via a helical spline 29. There is. At one end of the pinion shaft 30, a pinion 31
Is provided. The pinion shaft 30 is pushed back by the return spring 35 in the direction opposite to the arrow b shown in FIG.

As shown in FIG. 2, the electric circuit in this embodiment includes a battery 33 as a starter power source, a key switch 34 connected to the battery 33, and one fixed contact 13 of the first contacts.
And a fixed contact 18 of one of the second contacts, a series coil 10a and a shunt coil 10b which form a magnetic coil 10 connected to the key switch 34 and driving the plunger 11, and the other of the first contacts. Fixed contact 1
The coil 6a of one pole of the field coil 6 connected between the brush 4 of the armature 1 and 4 and the fixed contact 19 of the second contact and the fixed contact 19 of the second arm which are arranged in parallel with the coil 6a and connected in parallel with each other. The field coil 6 is connected between the brushes 7 and the other three pole coils 6b, 6c, 6d.

The magnetic shift starter of the above embodiment operates as follows.

First, in the initial state, as shown in FIG. 1, the shift lever 23 has the first fulcrum 22 set on the inner wall of the housing 22.
It is in contact with a, and the end of the shift lever 23 on the point of action is away from the pinion shaft 30. The plunger 11 of the magnetic switch 9 is pulled back by the torsion spring 24, the contact shaft 15 is returned by the contact return spring 20, and the movable contact 12 of the first contact is separated from the fixed contacts 13 and 14 and is opened. The movable contact 17 of the second contact is also opened apart from the fixed contacts 18 and 19. Further, the pinion shaft 30 is returned by the return spring 35, and the pinion 31 is separated from the ring gear 32 and is set in the non-meshing position.

When the key switch 34 of the electric circuit shown in FIG. 2 is turned on from the initial state, the battery 33 energizes the series coil 10a and the shunt coil 10b which form the magnetic coil 10 of the magnetic switch 9. When the magnetic coil 10 is energized, an electromagnetic force is generated, the plunger 11 is attracted in the direction of arrow a shown in FIG. 1, and moves against the torsion spring 24.

When the plunger 11 moves, the force point side end of the shift lever 23 inserted in the square hole 11a formed therein is towed, and the shift lever 23 is initially set on the inner wall of the housing 22 by the first It rotates counterclockwise in FIG. 1 with the fulcrum portion 22a as a rotation fulcrum. The shift lever
When 23 is rotated, the pinion shaft 30 is pushed against the return spring 35 by the end of its action point side in the direction of arrow b shown in FIG. When the pinion shaft 30 is pushed in the direction of arrow b,
The helical spline 29 provided between the clutch inner 27 and the pinion shaft 30 causes the pinion shaft 30 to rotate, and a meshing position between the pinion 31 and the ring gear 32 is searched for. At this time, as shown in FIG. 5, the action point side end of the shift lever 23 pushes the eccentric position O ′ with respect to the axial center position O of the pinion shaft 30. Therefore, as shown in FIG. 5, the shift lever 23 pushes the pinion shaft 30 with a component force (b) against the applied force (a) and pushes the pinion shaft 30 with a relatively weak force. Become. As a result, it is possible to avoid the collision of the pinion 31 with the ring gear 32 when the pinion 31 is pushed in the meshing direction.

On the other hand, as the plunger 11 moves in the direction of arrow a shown in FIG. 1, the movable contact 12 comes into contact with the fixed contacts 13 and 14 of the first contact, and the first contact is closed. When this first contact is closed, as can be seen from FIG. 2, only the one pole coil 6a of the field coil 6 is energized from the battery 33 and the coil 6a is excited. When the one-pole coil 6a is excited, a small current is supplied to the brush 7 of the armature 1 and a weak torque is output from the armature 1, and the torque is reduced by the armature shaft 2 by the armature gear 3 and the clutch gear 28. Then, it is transmitted to the pinion clutch 25, transmitted to the pinion shaft 30 via the pinion clutch 25, the pinion 31 is rotationally driven with a weak and decelerated torque, and the meshing position between the pinion 31 and the ring gear 32 is searched.

As described above, in this embodiment, when the pinion shaft 30 is pushed, the action of the helical spline 29 causes the pinion 31 to move.
Rotate again, armature 1 → armature shaft 2
→ Armature gear 3 → Clutch gear 28 → Pinion clutch 25 → Through the pinion shaft 30, the pinion 31 is rotated with a weak and decelerated torque to search the meshing position of the pinion 31 and the ring gear 32.
The pinion 31 can be smoothly meshed with the ring gear 32.

When the pinion 31 does not mesh with the ring gear 32 and the tooth end surface of the pinion 31 is in contact with the tooth end surface of the ring gear 32, the shift lever 23 moves the pinion shaft 30 along with the movement of the plunger 11 in the direction of the arrow a. It moves counterclockwise in FIG. 3 with the end on the side of the point of action in contact with the end face as the fulcrum. In this way, the shift lever 23 itself moves without the shift lever 23 pushing the pinion shaft 30 with an excessive force, so that the pinion shaft 30 can be moved with the tooth end surface of the pinion 31 contacting the tooth end surface of the ring gear 32. It is possible to prevent breakage or damage of the teeth of the pinion 31 and the ring gear 32 caused by the forced pushing.

The shift lever 23, which has moved about the fulcrum on the side of the action point that is in contact with the end surface of the pinion shaft 30, comes into contact with the shaft stopper 21 at its substantially intermediate portion, and the movement thereof is stopped. From this state, when the plunger 11 further moves in the direction of the arrow a, the shift lever 23 rotates with the shaft stopper 21, which is the second fulcrum portion, as the fulcrum of rotation, and the pinion shaft 30 is moved by the end of the action point side. Hold it down. At this time, the sixth
As shown in the figure, the end of the shift lever 23 on the point of action pushes the axial center position O of the pinion shaft 30. Pinion shaft
When the eccentric position O ′ of the pinion shaft 30 is continuously pushed by the end of the shift lever 23 on the point of action while the 30 is rotating by the torque output from the armature 1, a peripheral speed is generated at the eccentric position O ′. As a result, the end surface of the pinion shaft 30 is worn away, and an R-shaped recess 30 'is generated as shown in FIG.
Therefore, in this embodiment, the axial center position O of the pinion shaft 30 is pushed by the end portion of the shift lever 23 on the point of action, so that it is possible to prevent the occurrence of the R-shaped recess 30 'due to wear.

As described above, the pinion shaft 30 is pushed in the direction of the arrow b by the end of the shift lever 23 on the point of action, and the pinion shaft 30 is rotated by the action of the helical spline 29 and the torque output from the armature 1. As shown in FIG. 3, the teeth of the pinion 31 eventually mesh with the teeth of the ring gear 32. Pinion to ring gear 32
When 31 is meshed with each other, the shift lever 23, which is in contact with the shaft stopper 21, is returned to the position in contact with the inner wall of the housing 22 again by the action of the torsion spring 24, as shown in FIG. The pinion 31 is the arrow a of the plunger 11.
It is set at a meshing position with the ring gear 32 which is determined by the amount of movement in the direction.

After the plunger 11 closes the first contact, the arrow a
When it further moves in the direction, the contact shaft 15 is pushed in the direction of the arrow a against the contact return spring 20 by the plunger 11. When the contact shaft 15 is pushed, the movable contacts 17 provided on the contact shaft 15 come into contact with the fixed contacts 18 and 19 of the second contact, and the second contact is closed. When the second contact is closed, as can be seen from FIG. 2, the battery 33 energizes the three-pole coils 6b, 6c, 6d of the field coil 6 to excite them. In this state, the one-pole coil 6a of the field coil 6 is also energized and excited. Therefore, since the coils 6a to 6d of all four poles are excited, a large current is supplied to the brush 7 of the armature 1 and the armature 1
Outputs a strong torque.

The strong torque output from the armature 1 is as follows: armature shaft 2-> armature gear 3-> clutch gear
28 and the armature gear 3 and the clutch gear 28.
Is transmitted to the pinion clutch 25 → the pinion shaft 30 → the pinion 31, the ring gear 32 is rotationally driven, and the engine (not shown) is started.

After the engine is started, the key switch 34 is turned off, and the magnetic coil 10 of the magnetic switch 9 is turned on.
The power supply to is cut off. When the magnetic coil 10 is de-energized, the torsion spring 24 causes the plunger 11 to be pulled back in the direction opposite to the arrow a shown in FIG. 1, and the fixed contacts 13 and 14 of the first contact to the movable contact 12 And the first contact opens. In addition, the contact shaft 15 is returned by the action of the contact return spring 20, and the fixed contact 1 of the second contact is
The movable contact 17 is separated from 8, 19 and the second contact is also opened. When the first and second contacts are opened, the field coil 6
The four pole coils 6a to 6d are demagnetized and the rotation of the armature 1 is stopped.

On the other hand, when the plunger 11 moves in the direction opposite to the arrow a, the shift lever 23 is rotated clockwise in FIG. 4 with the first fulcrum portion 22a as the rotation fulcrum. When the shift lever 23 rotates clockwise, the shift lever 23
The end portion of the action point side of is separated from the pinion shaft 30. When the action point side end of the shift lever 23 separates from the pinion shaft 30, the return spring 35 returns the pinion shaft 30 to the original position, and the pinion 31 returns to the non-meshing position separated from the ring gear 32.

 As a result, each member returns to the initial state.

The field coil 6 which is a field coil is not limited to the one-pole and three-pole coils shown in the drawings, but may be two-pole and four-pole coils, for example.

[Effects of the Invention] As described above, according to the present invention, when the plunger is moved,
The shift lever is configured to be movable between the first fulcrum portion and the second fulcrum portion, and when the shift lever is rotated about the first fulcrum portion as a fulcrum by the movement of the plunger, the shift lever action point side The end is against the end face of the pinion shaft,
When the eccentric position decentered from the axial center position is pressed, and when the intermediate portion of the shift lever comes into contact with the second fulcrum portion due to the further movement of the plunger, the shift lever rotates about the second fulcrum portion as a fulcrum, Since the action point side end of the shift lever presses the axial center position of the end face of the pinion shaft, when the plunger starts to move, the pinion shaft is pushed by the component force of the force applied to the pinion shaft, and the pinion and ring gear. As a result of being able to reduce the impact force at the time of contact with the ring, it is possible to prevent the pinion from colliding with the ring gear, and also to prevent the wear of the end face of the pinion shaft, which is in contact with the action point side end of the shift lever, due to the action of peripheral speed. There is an effect that can be reduced.

[Brief description of drawings]

1 to 6 show an embodiment of the present invention.
The figure is a vertical side view, FIG. 2 is an electric circuit diagram, FIG. 3 and FIG. 4 are explanatory views of the operation shown in correspondence with FIG. 1, and FIG. 5 is a shift lever rotating at a first fulcrum. 6 is a partially enlarged view showing a state in which the eccentric position of the pinion shaft is pushed, and FIG. 6 is a partially enlarged view showing a state in which the shift lever rotates at a second fulcrum and pushes the axial center position of the pinion shaft. Is. FIG. 7 is an explanatory diagram of an R-shaped recess that occurs when the shift lever rotates about the second fulcrum and pushes the eccentric position of the pinion shaft. 1 ... motor armature, 2 ... armature shaft, 3 ... armature gear, 6 ... field coil which is a field coil of armature, 6a-6d ... 4 pole coil of field coil, 9 ... magnetic Switch, 10
...... Magnetic switch magnetic coil, 11 ...
… Same plunger, 12 …… Movable contact of first contact, 13,14
...... Fixed contact of the same first contact, 15 ...... Contact shaft, 17
...... Movable contact of the second contact, 18,19 ...... Fixed contact of the second contact, 20 ...... Contact return spring, 21 ...... Shaft stopper which is the second fulcrum part of the shift lever, 22 ...... Housing, 22
a ...... first fulcrum part of shift lever set in the housing, 22b ... fixing member on the housing side for locking one end of the torsion spring, 23 ... shift lever, 24
...... Torsion spring, 25 …… Pinion clutch,
28 …… Clutch gear, 29 …… Helical spline, 30…
… Pinion shaft, 31 …… Pinion, 32 …… Ring gear, 33 …… Battery, 34 …… Key switch, 35 …… Pinion shaft return spring.

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location F02N 15/06 F02N 15/06 J (56) References JP-A-113572 (JP, A) JP-A 2-140461 (JP, A) Actual Kaihei 1-80744 (JP, U) Japanese Patent Publication 1-40224 (JP, B2)

Claims (1)

(57) [Claims] 1. A motor capable of outputting low torque and high torque, and a pinion shaft movable axially,
A pinion capable of moving to a meshing position and a non-meshing position with respect to the ring gear for engine starting via the pinion shaft, a reduction mechanism for reducing the rotation of the motor and transmitting the rotation to the pinion, and a plunger movable in parallel with the pinion shaft. A magnet switch having a first contact for sequentially closing the motor with a low torque and a second contact for driving the motor with a high torque, and one end of the plunger of the magnet switch. A force lever side end portion is inserted, and the other end portion has an action point side end portion, and a shift lever for pushing the pinion into a meshing position with the ring gear via a pinion shaft, and one end portion for a fixing member. The other end of the shift lever is locked and the shift lever is normally elastic While the one side portion is brought into contact with the fixed member, when the plunger of the magnet switch is moved, the shift lever is rotated with the contact portion between the one side portion of the shift lever and the fixed member as the first fulcrum portion, In a magnetic shift starter equipped with a torsion spring that presses the pinion shaft with the end of the shift lever on the point of action, a first fulcrum part is located near the middle of the shift lever and sandwiches the shift lever. Is placed at a distance from
In addition to mounting the shaft stopper that forms the second fulcrum part, the shift lever is configured to be movable between the first fulcrum part and the second fulcrum part when the plunger is moved, and the shift lever is moved by the movement of the plunger. When the first lever is rotated with the first fulcrum as the fulcrum, the end on the action point side of the shift lever presses the eccentric position eccentric from the axial center with respect to the end surface of the pinion shaft, and when the eccentric position is pressed, When the contact of No. 1 is closed and the middle part of the shift lever comes into contact with the second fulcrum part by the further movement of the plunger, the shift lever moves to the second
The pivot point of the shift lever is a fulcrum, the end of the shift lever on the side of the action point presses the axial center position of the end face of the pinion shaft, and the second contact point is closed when the axial center position is pressed. Magnetic shift type starter.