JP3508324B2 - Starter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a starter for starting an engine, and more particularly to a brush device.

[0002]

2. Description of the Related Art In the conventional starter, the actual starter number is 63-71.
As disclosed in Japanese Patent No. 474,474, a motor, a pinion that is rotatably disposed in front of the motor in the axial direction, is driven by the motor, and a magnet switch that is disposed adjacent to a rear portion of the motor. A coaxial starter comprising is described.

This starter employs a coaxial structure in which the plunger of the magnet switch penetrates the rotary shaft of the motor to axially bias the pinion in front of the motor. According to this, since the magnet switch can be arranged behind the starter motor, the required area viewed from the axial direction of the starter can be reduced as compared to the conventional starter in which the magnet switch is arranged in parallel with the starter motor. You can

[0004]

However, in the conventional one, by using a face type commutator as the commutator,
Since the brush is pressed against the commutator by the coil spring from the axial direction, a predetermined amount of spring length is required to obtain a predetermined amount of spring pressure, and as a result, the axial length and There is a problem that the lengths of the magnet switches are overlapped with each other and the axial length is significantly increased.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a starter capable of reducing the axial length of a brush while ensuring the spring length of the brush.

[0006]

The starter of the present invention employs the following technical means. [Means for Claim 1] A plurality of field poles, an armature core arranged on the inner circumference of the field poles, to which an armature coil is mounted,
A starter motor having a shaft that rotatably holds the armature core, and a commutator that is provided at an end face in the axial direction and that is provided substantially orthogonal to the shaft for energizing the armature coil; A starter motor is energized by having a fixed contact and a plunger having a movable contact in contact with the fixed contact, and moving the plunger by a suction coil to bring the movable contact into contact with the fixed contact. The magnet switch disposed on the commutator side of the starter motor, the plurality of brushes contacting the commutator surface of the starter motor, and the outer side of the magnet switch on the outer side of the magnet switch.
Urging means arranged to overlap the suction coil in the axial direction and having a spring member for pressing the brush against the commutator surface.

[Means of Claim 2] In the starter of Claim 1, the biasing means is a coil spring. [Means for Claim 3] In the starter according to Claim 1 or 2, there is provided a brush holding member for slidably disposing the plurality of brushes, and the magnet switch is provided on the side opposite to the motor of the brush holding member. Is formed to accommodate the.

[Means of Claim 4] In the starter according to claim 3, a bearing for rotatably holding one end of the shaft of the starter motor is disposed in the center of the brush holding member. [Means of Claim 5] In the starter according to claim 3 or 4, the brush holding member is formed of a metal material such as aluminum.

[Means of Claim 6] In the starter according to any one of claims 1 to 5, in the magnet switch, the plunger of the magnet switch is arranged substantially at right angles to the shaft of the starter motor. . [Means for Claim 7] The starter according to any one of Claims 1 to 6, further comprising a cover for covering the magnet switch, and an opening on the brush side for accommodating the spring member in an inner periphery of the cover. A storage portion extending in the axial direction is integrally formed.

[0010]

In the starter of claim 1, the biasing means for pressing the brush against the commutator surface is provided on the outer peripheral side of the magnet switch in the starter of the magnet switch. By arranging the suction coil so as to overlap with the suction coil in the axial direction, the space existing on the outer peripheral side of the magnet switch can be set as the installation location of the biasing means. This makes it possible to provide a small starter without increasing the axial size of the starter due to the axial length of the biasing means.

[Operation of Claim 2 and Effect of the Invention] In the starter of claim 2, the biasing means for pressing the brush against the commutator surface is a coil spring, and this coil spring is provided on the outer peripheral side of the magnet switch. By arranging in the axial direction with, the length corresponding to the physique of the magnet switch can be set as the spring length, proper spring stress and load can be set, and the life of the spring is greatly improved. be able to. Further, it is possible to provide a small-sized starter without increasing the physical size of the starter in the axial direction due to the brush spring length.

[Operation of Claim 3 and Effect of the Invention] According to the starter of claim 3, an accommodating portion for accommodating the magnet switch is provided on the side opposite to the motor of the brush holding member for slidably disposing a plurality of brushes. By forming the magnet switch, it is not necessary to separately provide a storage portion for the magnet switch, and the number of parts can be reduced.

[Operation of Claim 4 and Effect of the Invention] In the starter of claim 4, a bearing for rotatably holding one end of the shaft of the starter motor is arranged in the center of the brush holding member. It is possible to provide an inexpensive starter without requiring a separate member for holding the shaft. [Operation and Effect of Invention] According to the starter of claim 5, by forming the brush holding member with a metal material such as aluminum, the heat generated from the brush and the magnet switch can be absorbed and radiated. It is possible to provide a starter having excellent heat resistance.

[Operation of Claim 6 and Effect of the Invention] According to the starter of claim 6, the magnet switch is arranged such that the plunger of the magnet switch is arranged substantially at right angles to the shaft of the starter motor. The axial length of the entire starter can be suppressed only by the radial length of the switch, and the spring length of the brush can be effectively utilized for the radial length of the magnet switch. There is no loss of the characteristics of.

[Operation of Claim 7 and Effect of the Invention] A starter according to claim 7 has a cover for covering the magnet switch, and the brush side for accommodating the spring member is opened in the inner periphery of the cover. Since the accommodating portion extending in the axial direction is integrally formed, this accommodating portion can be formed at a low cost with a two-piece mold when forming the cover.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a starter of the present invention will be explained based on an embodiment shown in FIGS. The starter is a housing 4 including a pinion 200 and a planetary gear mechanism 300 that mesh with a ring gear 100 arranged in the engine.
00, a motor 500, and an end frame 700 including a magnet switch 600. Also,
Inside the starter, the housing 400 and the motor 500
Is partitioned by a motor partition wall 800, and the motor 5
00 between the end frame 700 and the brush holding member 9
It is divided by 00.

[Description of Pinion 200] FIG. 1 or FIG.
As shown in, the pinion 200 is formed with a pinion gear 210 that meshes with the ring gear 100 of the engine. The output shaft 220 is provided on the inner peripheral surface of the pinion gear 210.
There is formed a pinion helical spline 211 that fits into the helical spline 221 formed on the.

A flange 213 having a diameter larger than the outer diameter of the pinion gear 210 is formed annularly on the side opposite to the ring gear of the pinion gear 210. This flange 213
The outer periphery of the pinion is formed with asperities 214 over the entire circumference, the number of which is greater than the number of external teeth of the pinion gear 210. This unevenness 2
Reference numeral 14 is for fitting a restriction claw 231 of a pinion rotation restriction member 230 described later. Washer 215
Is an annular portion 216 formed at the rear end of the pinion gear 210.
By bending the outer peripheral side of the flange 213, the rear surface of the flange 213 is rotatable and does not come off in the axial direction.

On the other hand, the pinion gear 210 is constantly urged rearward of the output shaft 220 by a return spring 240 which is a compression coil spring. The return spring 240 does not directly urge the pinion gear 210, but in this embodiment, the opening 410 of the housing 400.
The pinion gear 210 is urged via the ring body 421 of the shutter 420 which will be described later.

[Explanation of Pinion Rotation Restriction Member 230] The pinion rotation restriction member 230 is shown in FIG. 2 and FIG.
As shown in (b), a leaf spring member wound about 3/2,
Of these, about 3/4 turns is the rotation restricting portion 232 having a long axial plate length and a high spring constant, and the remaining about 3/4 turns is
The return spring portion 233 is a biasing means with a short spring length and a low spring constant.

At one end of the rotation restricting portion 232, a large number of irregularities 21 formed on the flange 213 of the pinion gear 210 are provided.
Regulating claw 23 that fits in 4 and forms a regulating portion extending in the axial direction
1 is provided. The restriction claw 231 fits into the irregularities 214 of the pinion gear 210, and
In order to improve the rigidity of No. 1, it is formed to be long in the axial direction, bent inward in the radial direction, and formed to have an L-shaped cross section. The rotation restricting portion 232 (having a rod shape) includes a straight portion 235 extending in the up-down direction. The straight portion 235 is formed by the center bracket 36.
It is slidably supported in the up and down direction by two support arms 361 provided so as to project from the front surface of 0. That is, the straight portion 235 moves in the vertical direction, so that the rotation restricting portion 2
32 also moves vertically.

At the lower end of the curvature in the middle of the rotation restricting portion 232 (position opposite to the restricting claw 231 by 180 °), a string-like member 680 (for example, a wire) described later that transmits the operation of the magnet switch 600 described later. Front end sphere 601
Are engaged. On the end side of the return spring portion 233, a large curvature of winding is provided, and the one end portion 23 of the return spring portion 233 is provided.
The reference numeral 6 is in contact with the upper surface of the regulation shelf 362 provided on the lower front surface of the center bracket 360.

The operation of the pinion rotation restricting member 230 will be described. The string-shaped member 680 is a transmission unit that transmits the operation of the magnet switch 600 to the restriction claw 231. The operation of the magnet switch 600 pulls the rotation restricting portion 232 downward so that the restriction claw 231 and the flange 213 of the pinion gear 210 are uneven. 214 is engaged. At that time, the one end portion 236 of the return spring portion 233 is in contact with the regulation shelf 362 for regulating the position, and the return spring portion 233 is bent. Since the restriction claw 231 is engaged with the unevenness 214 of the pinion gear 210, when the pinion gear 210 is tried to rotate via the armature shaft 510 of the motor 500 and the planetary speed reduction mechanism 300, the pinion gear 210 causes the helical spline of the output shaft 220 to rotate. Proceed along 221. When the pinion gear 210 comes into contact with the ring gear 100 and the forward movement of the pinion gear 210 is prevented, the pinion rotation restricting member 230 itself bends due to the further turning force of the output shaft 210, and the pinion gear 210 is rotated.
Rotates slightly and meshes with the ring gear 100. Then, when the pinion gear 210 moves forward, the restriction claw 231 disengages from the irregularities 214, and the restriction claw 231 moves into the pinion gear 21.
0 rearward of the flange 213, the front end of the regulating pawl 231 hits the rear surface of the washer 215, and the pinion gear 2
10 is prevented from retracting due to the rotation of the ring gear 100 of the engine.

At the same time when the operation of the magnet switch 600 is stopped and the cord member 680 stops pulling the rotation restricting portion 232 downward, the rotation restricting portion 232 is returned to its original position by the action of the return spring portion 233. . Since the pinion rotation restricting member 230 may be held by a small force that merely restricts the rotation of the pinion gear 210, the pinion gear 210 may be moved to the pinion gear 210 side by the magnet switch 600 by using the string member 680. Therefore, the degree of freedom in arranging the magnet switch 600 can be increased.

[Description of Pinion Locking Ring 250] The pinion locking ring 250 is fixed in an annular groove having a rectangular cross section formed around the output shaft 220. The pinion locking ring 250 is formed by rolling a steel material having a rectangular cross section, and has substantially S-shaped irregularities 251 (an example of engaging means) formed at both ends, and one convex portion is formed. Engage with the other recess, and the other protrusion engages with the one recess.

[Explanation of Planetary Gear Mechanism 300] As shown in FIG. 1, the planetary gear mechanism 300 includes a motor 500 described later.
Is a decelerating means for decelerating the number of revolutions and increasing the output torque of the motor 500. The planetary gear mechanism 300 includes the motor 5
No. 00 armature shaft 510 (described later) formed on the outer periphery of the front side, and this sun gear 310
And a plurality of planetary gears 320 that mesh with the sun gear 310 and rotate around the sun gear 310.
0 rotatably supported around the sun gear 310 and a planet carrier 330 integrally formed with the output shaft 220,
The outer periphery of the planetary gear 320 includes a cylindrical internal gear 340 that meshes with the planetary gear 320 and is made of resin.

[Description of Overrunning Clutch 350] In the overrunning clutch 350, the internal gear 340 is rotatably supported only in one direction (only in the direction in which the engine rotates to rotate). The overrunning clutch 350 is provided in the internal gear 34.
A clutch outer 351 forming a first cylindrical portion integrally formed on the front side of 0 and a rear surface of a center bracket 360 forming a fixed side that covers the front of the planetary gear mechanism 300,
The second, which is arranged so as to oppose the inner circumference of the clutch outer 351
It has an annular clutch inner 352 forming a cylindrical portion and a roller 353 accommodated in a roller accommodating portion formed to be inclined on the inner peripheral surface of the clutch outer 351.

Since the overrunning clutch 350 uses the center bracket 360 that rotatably supports the output shaft 220 via the bearing 370, the axial length can be made longer and the size can be reduced. . [Explanation of Center Bracket 360] The center bracket 360 is shown in FIGS. 4 to 6, and is arranged inside the rear side of the housing 400. Housing 40
0 and the center bracket 360 are connected to each other by a ring spring 390, one end of which is locked to the housing 400 and the other end of which is locked to the center bracket 360, and the rotational reaction force received by the clutch inner 352 that constitutes the overrunning clutch 350 is received. Absorbed by the ring spring 390,
The reaction force is provided so as not to be directly transmitted to the housing 400.

On the front surface of the center bracket 360, there are provided two support arms 361 for holding the pinion rotation restricting member 230 and a restricting shelf 362 on which the lower end of the pinion rotation restricting member 230 is mounted. Further, around the center bracket 360, a plurality of cutout portions 363 that fit with the convex portions (not shown) inside the housing 400 are formed. In addition, a recess 364 is formed at the lower end of the center bracket 360 for axially inserting a string-shaped member 680 (described later).

The planet carrier 330 is provided at its rear end with a flange-shaped protrusion 331 extending in the radial direction for supporting the planetary gear 320. A pin 332 extending rearward is fixed to the flange-shaped protrusion 331, and the pin 332 rotatably supports the planetary gear 320 via a metal bearing 333. Further, the planet carrier 330 has the front end portion of the housing 40.
It is rotatably supported by a housing bearing 440 fixed inside the front end of 0 and a center bracket bearing 370 fixed inside the inner cylindrical portion 365 of the inner circumference of the center bracket 360.

The planet carrier 330 has an annular groove 334 at the front end position of the inner cylindrical portion 365, and a retaining ring 335 is fitted in the annular groove 334. A washer 336 rotatably attached to the planet carrier 330 is provided between the retaining ring 335 and the front end of the inner cylindrical portion 365, and the retaining ring 335 is inserted through the washer 336 through the inner cylindrical portion 365. The planet carrier 330 is restricted from moving rearward by coming into contact with the front end of the. Further, the rear end of the center bracket bearing 370 that supports the rear side of the planet carrier 330 is
By providing a flange portion 371 sandwiched between the rear end of the inner cylindrical portion 365 and the flange-shaped protruding portion 331, the flange-shaped protruding portion 331 contacts the rear end of the inner cylindrical portion 365 via the flange portion 371. , Planet Carrier 330
Are restricted from moving forward.

A rear surface of the planet carrier 330 is provided with a recess 337 extending in the axial direction.
The front end of the armature shaft 520 is rotatably supported via a planet carrier bearing 380 arranged therein. [Description of Housing 400] The housing 400 includes a housing bearing 4 fixed inside the front end of the housing 400.
40 supports the output shaft 220, and the opening 410
In order to minimize the ingress of rainwater from the opening 41
In the lower part of 0, the housing 400 and the pinion gear 21
An impermeable wall 460 that minimizes the gap with the outer diameter of 0 is provided. Further, two slide grooves 450 extending in the axial direction are provided in the lower portion of the front end of the housing 400, and a shutter 420 described later is arranged in the slide grooves 450.

[Description of Shutter 420] Shutter 420
When the starter is activated and the pinion gear 210 moves forward along the output shaft 220, the ring body 421 operates.
Moves together with the pinion gear 210. Then,
The water blocking portion 422 integrated with the ring body 421 moves forward,
Open the opening 410 of the housing 400. When the operation of the starter is stopped and the pinion gear 210 moves rearward along the output shaft 220, the ring body 421 also moves to the pinion gear 2.
Move backwards with 10. Then, the ring body 421
The water shield 422 integrated with the housing also moves rearward, and the housing 40
The zero opening 410 is closed. As a result, when the starter is not in operation, the shutter 420, which serves as the opening / closing means, prevents rainwater or the like scattered by the centrifugal force of the ring gear 100 from impinging on the water blocking portion 4.
22 prevents entry into the housing 400.

[Description of Seal Member 430] Seal Member 4
The numeral 30 seals the periphery of the output shaft 220, and prevents rainwater, dust, and the like entering through the opening 410 of the housing 400 from entering the housing bearing 440 at the front end of the housing 400. [Description of Motor 500] The motor 500 includes the yoke 50.
1, motor partition 800, brush holding member 900 described later
Surrounded by The motor partition wall 800 accommodates the planetary gear mechanism 300 with the center bracket 360, and also serves to prevent the lubricating oil in the planetary gear mechanism 300 from entering the motor 500.

The motor 500 includes, as shown in FIG. 1, an armature shaft 510 and the armature shaft 510.
Armature 540 composed of an armature core 520 and an armature coil 530 that are fixed to the body and rotate integrally
And a fixed magnetic pole 550 for rotating the armature 540, and the fixed magnetic pole 550 is fixed to the inner circumference of the yoke 501.

[Description of Armature Shaft 510] The armature shaft 510 is rotatably supported by a planet carrier bearing 380 inside the rear of the planet carrier 330 and a brush holding member bearing 564 fixed to the inner circumference of the brush holding member 900. It The front end of the armature shaft 510 is inserted inside the planetary gear mechanism 300, and as described above, the sun gear 310 of the planetary gear mechanism 300 is formed on the outer periphery of the front end of the armature shaft 510.

[Description of Armature Coil 530] The armature coil 530 includes a plurality (for example, 25) of upper layer coil bars 531 and the same number of lower layer coil bars 532 as the upper layer coil bars 531 in this embodiment. A two-layer winding coil in which the coil bar 531 and the lower layer coil bar 532 are laminated in the radial direction is adopted. Then, each upper layer coil bar 531 and each lower layer coil bar 532 are combined, and the end portion of each upper layer coil bar 531 and each lower layer coil bar 532.
And an end portion thereof are electrically connected to form an annular coil.

[Description of Upper Layer Coil Bar 531] The upper layer coil bar 531 is made of a material having excellent electrical conductivity (eg, copper), extends in parallel to the fixed magnetic pole 550, and has a slot 5
The upper coil side 533 is held on the outer peripheral side of 24 and two upper layer coil ends 534 that are bent inward from both ends of the upper coil side 533 and extend in the direction perpendicular to the axial direction of the armature shaft 510. The upper layer coil side 533 and the two upper layer coil ends 534 may be integrally formed by cold casting, or may be formed by bending in a U shape by pressing, and are formed as separate parts. Upper coil side 533 and two upper coil ends 53
It may be formed by joining 4 and 4 by a joining technique such as welding.

The upper coil side 533 is shown in FIGS.
As shown in FIG. 11, a straight rod having a rectangular cross section, and as shown in FIG. , And is firmly housed in the slot 524. As shown in FIG. 10, one of the two upper layer coil ends 534 is provided with one upper layer coil end 534 inclined toward the forward side with respect to the rotation direction, and the other upper layer coil end 534.
Is provided so as to be inclined backward with respect to the rotation direction. The inclination angles of the two upper layer coil ends 534 with respect to the radial direction are the same with respect to the upper layer coil side 533, and the two upper layer coil ends 534 are provided in the same shape. By doing this, the upper coil bar 531
Even if it is inverted by 80 °, the upper coil bar 531 has the same shape as before the inversion. That is, the two upper layer coil ends 534
Since there is no distinction between them, the workability when assembling the upper coil bar 531 to the armature core 520 is excellent.

Of the two upper layer coil ends 534, the upper layer coil end 534 located on the magnet switch 600 side.
Directly contacts a brush 910 described later to energize the armature coil 86. Therefore, at least the surface of the upper coil end 534 with which the brush 910 abuts is smoothed. The starter of this embodiment does not need to have an independent commutator for energizing the armature coil 530. That is, since an independent commutator is not required, the number of parts can be reduced, the number of manufacturing steps of the starter can be reduced, and the manufacturing cost can be suppressed. Further, since it is not necessary to dispose an independent commutator inside the starter, there is an effect that the physical size of the starter in the axial direction can be reduced.

[Description of Lower Layer Coil Bar 532] The lower layer coil bar 532 is made of a material having excellent electrical conductivity (for example, copper) like the upper layer coil bar 531 and extends parallel to the fixed magnetic pole 550 and is retained inside the slot 524. Lower layer coil side 536, and two lower layer coil ends 537 bent inward from both ends of the lower layer coil side 536 and extending in the direction perpendicular to the axial direction of the shaft 510. The lower coil side 536 and the two lower coil ends 537 may be integrally formed by cold casting, or may be formed by bending in a U shape by pressing, like the upper coil bar 531. Alternatively, the lower coil side 536 and the two lower coil ends 537, which are formed as separate parts, may be joined by a joining technique such as welding.

The insulation between the upper coil ends 534 and the lower coil ends 537 is ensured by the insulating spacer 560, and the insulation between the lower coil ends 537 and the armature core 520 is made of resin (for example, nylon or phenol). It is secured by an insulating ring 590 of resin. Lower coil side 5
Reference numeral 36 denotes a linear rod having a rectangular cross section as shown in FIGS. 8 and 11, and is firmly housed in the slot 524 together with the upper coil side 533 as shown in FIG. In addition,
The lower layer coil side 536 is accommodated in the slot 524 while being covered with the lower layer insulating film (for example, nylon or paper) together with the upper layer coil side 533 covered with the upper layer insulating film.

At the inner peripheral ends of the lower coil ends 537 at both ends, lower layer internal extensions 539 extending in the axial direction are provided. The outer peripheral surface of the lower layer internal extension portion 539 has an insulating spacer 56.
0 is fitted in the recess 561 formed on the inner circumference of the upper layer 0, and the upper layer internal extension 538 of the upper coil end 534 is formed.
Are superposed on the inner circumference of the, and are electrically and mechanically connected by a joining technique such as welding. The inner peripheral surface of the lower layer internal extension portion 539 is separated from the armature shaft 510 and insulated.

Further, the inner peripheral end portions of the two upper coil ends 534 are provided with an upper layer internal extension 538 extending in the axial direction. The inner peripheral surface of the upper layer internal extension 538 is superposed on the outer periphery of the lower layer internal extension 539 provided at the inner end of the lower coil bar 532 described above, and is electrically and mechanically connected by a joining technique such as welding. It Also, the upper internal extension 5
The outer peripheral surface of 38 abuts on the inner surface of the outer peripheral annular portion 571 of the fixing member 570 press-fitted and fixed to the armature shaft 510 via the insulating cap 580.

[Description of Insulating Spacer 560] The insulating spacer 560 is a thin plate ring made of resin (eg, epoxy resin, phenol resin, nylon), and as shown in FIG. 12, the protrusion 534 a of each upper coil end 534 is arranged on the outer peripheral side. Are formed with a plurality of holes 561. Also,
On the inner circumference of the insulating spacer 560, a recess 56 into which a lower layer internal extension 539 inside the lower coil end 537 is fitted.
2 is formed. Hole 56 of this insulating spacer 560
The 1 and the recess 562 are used for positioning and fixing the armature coil 530, as described later.

[Description of Fixing Member 570] Fixing Member 570
13 is an iron annular body, and as shown in FIG. 13, the inner peripheral annular portion 572 press-fitted into the armature shaft 510 and the axial direction that prevents the upper layer coil end 534 and the lower layer coil end 537 from expanding in the axial direction. Restricting ring 57 extending vertically
3 and an outer peripheral annular portion 571 that encloses the upper layer internal extension 538 of the upper coil end 534 and prevents the inner diameter of the armature coil 530 from expanding due to centrifugal force. It should be noted that this fixing member 570 is provided between the upper layer coil end 534 and the lower layer coil end 537 in order to secure insulation between the upper layer coil end 534 and the lower layer coil end 537.
A disc-shaped insulating cap 580 made of resin (for example, nylon) shown in FIG. 4 is interposed.

In the armature 540, the upper-layer coil ends 534 at both ends of the upper-layer coil bar 531 and the lower-layer coil ends 537 at both ends of the lower-layer coil bar 532, which form the armature coil 530, are respectively arranged.
Since it is provided perpendicularly to the axial direction of 10, the axial dimension of the armature 540 can be shortened, and the axial dimension of the motor 500 can also be shortened. As a result, the starter can be downsized as compared with the conventional one. .

In this embodiment, the magnet switch 600 is arranged in the space for reducing the axial dimension of the motor 500 and the space for reducing the commutator, which is independent of the commutator. Although the axial dimension of the magnet switch 6 does not change much, the conventional magnet switch 6 mounted above the motor 500
Since the space of 00 is unnecessary, the volume occupied by the starter can be dramatically reduced as compared with the conventional case.

[Description of Fixed Magnetic Pole 550] Fixed Magnetic Pole 550
In the present embodiment, a permanent magnet is used. As shown in FIG. 15, a plurality of (for example, six) main magnetic poles 551 and inter-pole magnetic poles 552 arranged between the main magnetic poles 551 are used. Composed. As the fixed magnetic pole 550, a field coil that generates a magnetic force by energization may be used instead of the permanent magnet.

The main magnetic pole 551 is positioned by the inner ends of the groove 502 of the yoke 501 described above.
The fixed sleeve 5 arranged on the inner circumference of the fixed magnetic pole 550 with the interpole magnetic pole 552 arranged between the main magnetic poles 551.
It is fixed inside the yoke 501 by 53. [Description of Magnet Switch 600] As shown in FIGS. 1, 16 and 17, the magnet switch 600 is
The brush holder 900 is held by a brush holder 900, which will be described later, is disposed in an end frame 700, which will be described later, and is fixed in a direction substantially perpendicular to the armature shaft 510.

The magnet switch 600 drives the plunger 610 upward by energization, and the plunger 61
The two contacts (lower movable contact 611 and upper movable contact 612) that move integrally with 0 are sequentially brought into contact with the head 621 of the terminal bolt 620 and the contact portion 631 of the fixed contact 630. A battery cable (not shown) is connected to the terminal bolt 620.

The magnet switch 600 is constructed inside a bottomed cylindrical magnet switch cover 640 made of a magnetic material (for example, iron). The magnet switch cover 640 is formed by pressing a mild steel plate into a cup shape, for example, and has a hole 641 at the center of the bottom of the magnet switch cover 640 through which the plunger 610 is vertically movable. Also, the magnet switch cover 6
The upper opening of 40 is closed by a stationary core 642 made of a magnetic material (for example, iron).

The stationary core 642 comprises an upper large diameter portion 643, a lower middle diameter portion 644, and a lower small diameter portion 645. The outer periphery of the large diameter portion 643 is the upper end of the magnet switch cover 640. By caulking inward, the stationary core 642 is fixed in the upper opening of the magnet switch cover 640. The upper end of the suction coil 650 is mounted around the middle diameter portion 644. An upper end of a compression coil spring 660 that urges the plunger 610 downward is attached to the outer periphery of the small diameter portion 645 of the stationary core 642.

The suction coil 650 is a suction means for generating a magnetic force when energized to attract the plunger 610, and the suction coil 650 has an upper end at the stationary core 6
A sleeve 651 that is attached to the medium-diameter portion 644 of 42 and covers the plunger 610 slidably in the vertical direction is provided. This sleeve 651 is formed by rolling a thin plate of a non-magnetic material (for example, copper plate, brass, stainless steel), and an insulating washer 652 made of resin or the like is provided at the upper and lower ends of this sleeve 651. An insulating film (not shown) made of thin resin (for example, cellophane, nylon film) or paper is wrapped around the sleeve 651 between the two insulating washers 652, and a thin enamel wire is further wrapped around the insulating film. Is wound a predetermined number of times to form a suction coil 650.

The plunger 610 is made of a magnetic metal (for example, iron) and has a substantially cylindrical shape having an upper small diameter portion 613 and a lower large diameter portion 614. The lower end of the compression coil spring 660 is attached to the small diameter portion 613, and the large diameter portion 614, which is relatively long in the axial direction, is held in the sleeve 651 so as to be vertically movable. Above the plunger 610,
Plunger shaft 6 extending above the plunger 610
15 is fixed. This plunger shaft 615
Protrudes upward from a through hole provided in the center of the stationary core 642. This plunger shaft 6
An upper movable contact 612 is slidably inserted in the vertical direction along the plunger shaft 615 above the 15 stationary cores 642. This upper movable contact 61
2 is a plunger shaft 615 as shown in FIG.
A retaining ring 616 attached to the upper end of the plunger shaft 615 prevents the plunger shaft 615 from moving upward from the upper end. As a result, the upper movable contact 612 is vertically slidable along the plunger shaft 615 between the retaining ring 616 and the stationary core 642. The upper movable contact 612 is constantly urged upward by a contact pressure spring 670 made of a leaf spring attached to the plunger shaft 615.

The upper movable contact 612 is made of a highly conductive metal such as copper, and when both ends of the upper movable contact 612 move to the upper side, they come into contact with the two contact portions 631 provided on the fixed contact 630. The lead wires 911 of the pair of brushes 910 are electrically and mechanically fixed to the upper movable contact 612 by caulking or welding. Further, the ends of the resistor bodies 617 forming a plurality of (two in this embodiment) limiting means are inserted into the groove portions of the upper movable contact 612, and are fixed electrically and mechanically.

The upper movable contact 612 has a brush 9
Although each lead wire 910a of 10 is fixed electrically and mechanically by crimping, welding, etc., the upper movable contact 612 and each lead wire 910a of the brush 910 may be integrally formed. The resistor 617 is for rotating the rotation of the motor 500 at a low speed at the initial start-up of the starter, and is formed by winding a plurality of metal wires having a large resistance value. The lower movable contact 611 located below the head 621 of the terminal bolt 620 is fixed to the other end of the resistor 617 by caulking or the like.

The lower movable contact 611 is made of a highly conductive metal such as copper, contacts the upper surface of the stationary core 642 when the magnet switch 600 is stopped, and the plunger 610 is positioned below, and the resistor 617. Moves upward as the plunger shaft 615 moves,
The upper movable contact 612 is provided so as to contact the head portion 621 of the terminal bolt 620 before contacting the contact portion 631 of the fixed contact 630.

On the lower surface of the plunger 610, the string-shaped member 6
Sphere 681 provided at the rear end of 80 (for example, wire)
And a recess 682 that accommodates the. A female screw 683 is formed on the inner peripheral wall of the recess 682. This female screw 6
A fixing screw 684 for fixing the sphere 681 is screwed into the recess 682. This fixing screw 684 is a female screw 6
By adjusting the amount of screwing into 83, the string-shaped member 6
The length of 80 is also adjusted. The string-shaped member 6
When the plunger shaft 615 moves upward and the lower movable contact 611 abuts on the terminal bolt 620, the length of 80 is adjusted by the restriction claw 23 of the pinion rotation restriction member 230.
1 is adjusted so as to fit into the unevenness 214 on the outer periphery of the pinion gear 210. The female screw 683 and the fixing screw 684 form an adjusting mechanism.

With this structure, since the pinion rotation restricting member 230 is moved to the pinion gear 210 side via the string member 680 in response to the movement of the plunger 610 of the magnet switch 600, the conventional link mechanism is used. Also, the number of parts can be reduced without the need for a lever and the like.
Even if it is not separated from 00, the plunger 610 returns to its original position due to the bending of the string-shaped member 680 itself,
The upper movable contact 612 can be separated from the fixed contact 630.

Further, since the restricting claw 231 of the pinion rotation restricting member 230 need only be engaged with the unevenness 214 provided on the pinion gear 210, the string-like member 680 allows
The restriction claw 231 can be reliably moved. The durability can be improved by using the string-shaped member 680 as a wire. Further, the length of the string-shaped member 680 can be easily increased by disposing an adjusting mechanism including the female screw 683 and the fixing screw 684 between the plunger 610 and the string-shaped member 680 and screwing the fixing screw 684 into the female screw 683. You can decide.

Further, since the plunger shaft 615 of the magnet switch 600 is arranged in a substantially vertical direction, the plunger shaft 6 of the magnet switch 600 is
The axial dimension of the starter can be shortened as compared with the case where 15 is arranged in the axial direction, and the cord-shaped member 6
The stroke of the plunger shaft 615 required to pull 80 can be set small, and the magnet switch 600 can be further downsized.

Further, in the magnet switch 600, since the armature shaft 510 is arranged orthogonal to the armature shaft 510 in the axial direction, only the radial length of the magnet switch 600 becomes the axial length of the entire starter. It is only added and does not increase the physique of the entire starter. [Description of End Frame 700] End Frame 700
As shown in FIG. 18, a magnetic switch cover made of resin (for example, phenol resin) accommodates the magnetic switch 600 inside. On the rear surface of the end frame 700, a spring holding column 710 that holds a compression coil spring 914 that biases the brush 910 forward is provided so as to project forward depending on the position of the brush 910. .

Further, as shown in FIG. 1, the compression coil spring 914 is arranged so as to overlap the outer circumference of the magnet switch 600. Compression coil spring 914
As shown in FIG.
It is arranged so as to overlap with the drawing coil 650 in the axial direction.
ing. The terminal bolt 620 is an iron bolt that is inserted from the inside of the end frame 700 and projects to the rear of the end frame 700, and has a head 621 that abuts on the inner surface of the end frame 700 on the front side. Then, the crimping washer 622 is attached to the terminal bolt 620 protruding rearward of the end frame 700, so that the terminal bolt 620 is fixed to the end frame 700. A fixed contact 630 made of copper is provided on the front end of the terminal bolt 620.
Is fixed by caulking. The fixed contact 630 is
The end frame 700 is provided with one or a plurality of (two in this embodiment) abutting portions 631 located at the inner upper end thereof, and the lower surface of the abutting portions 631 is moved upward and downward by the operation of the magnet switch 600. Is provided so as to be able to contact.

Further, the spring length of the compression coil spring 914 can be utilized up to the length of the magnet switch 600 in the radial direction, appropriate spring stress and load can be set, and the life of the compression coil spring 914 can be greatly extended. Can be improved. Further, the compression coil spring 91
Since No. 4 effectively uses the space on the outer peripheral side of the magnet switch 600, the length of the compression coil spring 914 is not added to the axial length of the starter, and the entire starter can be shortened.

[Description of Brush Holder 900] The brush holder 900 includes the inside of the yoke 501 and the end frame 70.
In addition to the role of rotatably supporting the rear end of the armature shaft 510 via the brush holder bearing 564, the role of a brush holder, the role of holding the magnet switch 600, and the string member 680. It serves to hold a pulley 690 that guides the. The brush holder 900 has a hole (not shown) through which the string-shaped member 680 passes.

The brush holder 900 is a partition wall formed of a metal such as aluminum by a casting technique, and as shown in FIGS. 19 to 21, has a plurality of brush holding holes 911 and 912 for holding the brush 910 in the axial direction. In the embodiment, two are provided on the upper side and two on the lower side). Upper brush holding hole 91
Reference numeral 1 denotes a hole for holding a brush 910 that receives a positive voltage, and this upper brush holding hole 911 holds the brush 910 via an insulating cylinder 913 made of resin (for example, nylon or phenol resin) (see FIG. 20. 19 is a sectional view taken along line AA of FIG. 19, and FIG. 21 is a sectional view taken along line BB of FIG. 19). The lower brush holding hole 912 is a hole for holding the brush 910 that is grounded.
12 holds the brush 910 directly inside the hole.

In this way, by holding the brush 910 by the brush holder 900, it is not necessary to provide a separate brush holder for the starter. For this reason,
The number of parts of the starter can be reduced, and the number of assembly steps can be reduced. The front end surface of the brush 910 is biased by the compression coil spring 914 to the rear surface of the upper coil end 534 on the rear side of the armature coil 530.

The lead wire 91 of the upper brush 910 is used.
0a is electrically and mechanically coupled to the upper movable contact 612 which is moved by the magnet switch 600 by a joining technique such as welding or caulking. Further, the lead wire 910a of the lower brush 910 is caulked in the recess 920 formed on the rear surface of the brush holder 900 to electrically,
And mechanically coupled. In this embodiment, one pair of lower brushes 910 is provided, one pair of lower brushes 910 is joined to one lead wire 910a, and the center of the lead wire 910a is the brush holder. It is crimped in a recess 920 on the rear surface of 900.

On the rear surface of the brush holder 900, two pedestals 930 are in contact with the front side of the magnet switch 600.
And two fixed columns 940 that hold the periphery of the magnet switch 600 are formed. The pedestal 930 is provided so as to match the outer shape of the magnet switch 600 in order to come into contact with the magnet switch 600 having an outer diameter of a cylindrical shape. Also, two fixed columns 940
Holds the magnet switch 600 by crimping the rear ends of the magnet switch 600 inward while the magnet switch 600 is in contact with the pedestal 930.

On the lower side of the rear surface of the brush holder 900, the moving direction of the string member 680 is set to the magnet switch 600.
A pulley holding portion 950 that holds a pulley 690 that is converted from the vertical direction to the axial direction is formed. [Operation of Embodiment] Next, the operation of the starter will be described with reference to FIG.
A description will be given according to the electric circuit diagrams of (a) to (c).

When the occupant sets the key switch 10 to the start position, the battery 20 energizes the attraction coil 650 of the magnet switch 600. When the suction coil 650 is energized, the magnetic force generated by the suction coil 650 pulls the plunger 610, and the plunger 610 moves upward from the lower position. Plunger 6
When the plunger 10 rises, the upper movable contact 612 and the lower movable contact 6 are moved as the plunger shaft 615 rises.
As 11 moves up, the rear end of the string-shaped member 680 also moves up. When the rear end of the string-shaped member 680 rises, the front end of the string-shaped member 680 is pulled downward, and the pinion rotation restricting member 230 descends. When the regulating claw 231 fits into the irregularities 214 on the outer periphery of the pinion gear 210 due to the lowering of the pinion rotation regulating member 230, the lower movable contact 611.
Contacts the head 621 of the terminal bolt 620 (see FIG. 22).
(See (a)). The voltage of the battery 20 is applied to the terminal bolt 620, and the voltage of the terminal bolt 620 changes from the lower movable contact 611 to the resistor 617 to the upper movable contact 612.
→ It is transmitted to the upper brush 910 via the lead wire 910a. That is, the low voltage via the resistor 617 is transmitted to the armature coil 530 via the upper brush 910. The lower brush 910 is the brush holder 90.
Since it is always grounded via 0, the armature coil 530 formed in a coil shape by combining each upper coil bar 531 and each lower coil bar 532 is energized at a low voltage. Then, the armature coil 530 generates a relatively weak magnetic force, and this magnetic force acts (adsorbs or repels) on the magnetic force of the fixed magnetic pole 550, and the armature 540 rotates at a low speed.

When the armature shaft 510 rotates,
The planetary gear 320 of the planetary gear mechanism 300 is rotationally driven by the sun gear 310 at the front end of the armature shaft 510. When planetary gear 320 applies rotational torque in the direction of rotationally driving ring gear 100 via planet carrier 330 to internal gear 340, the rotation of internal gear 340 is restricted by the operation of overrunning clutch 350. That is, since the internal gear 340 does not rotate, the planetary gear 320 rotates in a decelerated manner by the rotation of the planetary gear 320. When the planet carrier 330 rotates, the pinion gear 210 also tries to rotate, but the pinion gear 210 does not rotate.
Since the rotation is restricted by the pinion gear 21
0 advances along the helical spline 221 of the output shaft 220.

As the pinion gear 210 advances, the shutter 420 also advances and opens the opening 410 of the housing 400. Then, as the pinion gear 210 advances, the pinion gear 210 completely meshes with the ring gear 100 of the engine, and then contacts the pinion locking ring 250. Further, when the pinion gear 210 moves forward, the restriction claw 2
31 disengages from the irregularities 214 of the pinion gear 210, and then the front end of the restricting claw 231 falls to the rear side of the washer 215 provided on the rear surface of the pinion gear 210.

On the other hand, with the pinion gear 210 moved forward, the upper movable contact 612 is moved to the contact portion 63 of the fixed contact 630.
Abut 1. Then, the battery voltage of the terminal bolt 620 is directly transmitted to the upper brush 910 via the upper movable contact 612 → the lead wire 910a. That is, a high current flows through the armature coil 530 including the upper layer coil bars 531 and the lower layer coil bars 532, the armature coils 530 generate a strong magnetic force, and the armature 540 rotates at high speed.

The rotation of the armature shaft 510 is decelerated by the planetary gear mechanism 300 to increase the rotational torque, and rotationally drives the planet carrier 330. At this time, the front end of the pinion gear 210 contacts the pinion locking ring 250, and rotates together with the planet carrier 330. Since the pinion gear 210 meshes with the ring gear 100 of the engine, the pinion gear 2
10 rotationally drives the ring gear 100 to rotationally drive the output shaft of the engine.

Next, when the engine is started and the ring gear 100 of the engine rotates faster than the rotation of the pinion gear 210, a backward force is generated in the pinion gear 210 by the action of the helical spline. However, the rotation restricting claws 231 that have fallen behind the pinion gear 210 prevent the pinion gear 210 from moving backward, prevent the pinion gear 210 from prematurely disengaging, and reliably start the engine (see FIG. 22 (b)). .

When the ring gear 100 of the engine is rotated faster than the rotation of the pinion gear 210 by starting the engine, the rotation of the ring gear 100 drives the pinion gear 210 to rotate. Then, the rotational torque transmitted from the ring gear 100 to the pinion gear 210 is transmitted to the pin 332 that supports the planetary gear 320 via the planet carrier 330. That is, the planetary gear 320 is driven by the planet carrier 330. Then, the internal gear 34
The torque of reverse rotation is applied to 0 when the engine is started.
Allow 00 rotation. In other words, when torque reverse to that at the time of engine start is applied to the internal gear 340, the roller 353 of the overrunning clutch 350 separates to the outside of the recess 355 of the clutch inner 352, and the internal gear 340 is allowed to rotate. Become.

That is, the relative rotation in which the engine starts and the ring gear 100 of the engine rotationally drives the pinion gear 210 is absorbed by the overrunning clutch 350, and the armature 540 is not rotationally driven by the engine. When the engine starts, the occupant removes the key switch 10 from the start position, and the energization of the attraction coil 650 of the magnet switch 600 is stopped. When the suction coil 650 is de-energized, the plunger 610 is returned downward by the action of the compression coil spring 660.

Then, the upper movable contact 612 becomes the fixed contact 6
While moving away from the contact portion 631 of 30, the lower movable contact 611 also moves away from the head portion 621 of the terminal bolt 620, and the energization of the upper brush 910 is stopped. Further, when the plunger 610 is returned downward, the return spring portion 236 of the pinion rotation restricting member 230 causes the pinion rotation restricting member 230 to return upward, and the restricting claw 231 disengages from the rear of the pinion gear 210. Then, the pinion gear 210 is returned to the rear by the action of the return spring 240, the mesh between the pinion gear 210 and the ring gear 100 of the engine is disengaged, and the pinion gear 2
The rear end of 10 abuts the flange-shaped protrusion 222 of the output shaft 220. That is, the pinion gear 210 is returned before the starter is started (see FIG. 22 (c)).

Further, when the plunger 610 is returned downward, the lower movable contact 611 abuts on the upper surface of the stationary core 642 of the magnet switch 600, and the lead wire of the upper brush 910 makes the upper movable contact 6 contact.
12 → resistor 617 → lower movable contact 611 → stationary core 642 → magnet switch cover 640 → brush holder 900 in order. That is, the upper brush 910 and the lower brush 910 are the brush holder 90.
Short circuit through 0. On the other hand, due to the inertial rotation of the armature 540, an electromotive force is generated in the armature coil 530. Then, this electromotive force short-circuits via the upper brush 910, the brush holder 900, and the lower brush 910,
The braking force is applied to the inertial rotation of the armature 540. As a result, the armature 540 stops rapidly.

[Effects of Embodiment] According to the present invention, the coil spring 914 for pressing the brush 910 onto the upper coil end 534 forming the commutator surface is provided with the magnet switch 60.
By arranging in the axial direction on the outer peripheral side of 0, the space on the outer peripheral side of the magnet switch 600 can be effectively used, and the physical length in the axial direction of the starter can be determined by the axial length of the biasing means and the coil spring 914. A small starter can be provided without increasing the number.

Further, the coil spring 914 can have a length corresponding to the physical size (diameter) of the magnet switch 600 as the spring length, and can set an appropriate spring stress and load, and The life can be greatly improved. In addition, a plurality of brushes 91
It is not necessary to separately provide a storage portion for the magnet switch 600 by forming a storage portion for storing the magnet switch 600, that is, a pedestal 830 on the side opposite to the motor 500 of the brush holder 900 in which 0 is slidably arranged. Therefore, the number of parts can be reduced.

In addition, the magnet switch 600 is arranged such that the plunger 610 of the magnet switch 600 is disposed orthogonal to the shaft 510 of the starter motor 500, and the brush 910 is radially outer with respect to the axis of the plunger 610. Since the magnet switch 600 is disposed on the side, the axial length of the entire starter is suppressed only by the radial length of the magnet switch 600, and the coil spring 914 of the brush 910 is disposed in the magnet switch 600.
The length of the spring can be effectively used, and the characteristics of the spring are not lost.

[Second Embodiment] The second embodiment will be described below with reference to FIG. The plunger 610 of the magnet switch 600 is arranged in the same direction as the axial direction of the shaft 510 of the motor 500. The magnet switch 600 is provided integrally with the rear partition wall 900.
The non-movable contact 612 side is housed in a housing portion 931 that extends in the axial direction. In addition, the wire 680 fixed to the plunger 610 is bent in the radial direction via the first pulley 691 rotatably held by the first pulley holding portion 951, and then the second pulley holding portion 950. Is axially bent by a second pulley 690 rotatably held by
Guided between poles 550.

The movement of the plunger 610 of the magnet switch 600 is restricted by the end surface 932 formed in the storage portion 931 of the rear partition wall 900. According to this embodiment, similarly to the first embodiment, the axial length of the magnet switch 600 can be used as the axial length of the spring 914 of the brush, and the spring characteristics can be sufficiently obtained. Further, the rear frame portion 700 can be made thin by shortening the radial length of the magnet switch 600, which is effective when there is an obstacle in the radial direction when the starter engine is assembled.

Further, in the above-mentioned embodiment, the plunger 610 is arranged orthogonal to the armature shaft 510 of the starter motor 500, but the plunger 610 and the armature shaft 510 are arranged so as to necessarily intersect each other. The armature shaft 510 from the axial extension line to the plunger 6
It goes without saying that 10 may be provided separately.

The fact that the plunger 610 is substantially perpendicular to the armature shaft 510 means that it may be inclined at an angle of 45 degrees to 30 degrees with respect to 90 degrees.

[Brief description of drawings]

FIG. 1 is a side sectional view showing a first embodiment of a starter of the present invention.

FIG. 2 is a perspective view of a pinion rotation restriction member.

3 (a) and 3 (b) are a front view and a partial cross-sectional side view when a pinion rotation restricting member is assembled to a pinion portion.

FIG. 4 is a rear view of the center bracket.

FIG. 5 is a side sectional view of a center bracket.

FIG. 6 is a front view of a center bracket.

FIG. 7 is a side sectional view of an armature.

FIG. 8 is a side view of an upper coil bar.

FIG. 9 is a front view of an upper coil bar.

FIG. 10 is a schematic perspective view showing an arrangement state of an upper coil bar and a lower coil bar.

FIG. 11 is a cross-sectional view of an upper coil side and a lower coil side housed in a slot.

FIG. 12 is a front view of an insulating spacer.

FIG. 13 is a side sectional view of a fixing member.

FIG. 14 is a front view of an insulating cap.

FIG. 15 is a side sectional view of a yoke.

FIG. 16 is an exploded perspective view of a plunger and a fixed contact of the magnet switch.

FIG. 17 is a perspective view showing a plunger of a magnet switch.

FIG. 18 is a cross-sectional view showing an end frame and a brush spring.

FIG. 19 is a front view showing a brush holder.

20 is a cross-sectional view taken along the line AA of FIG.

21 is a cross-sectional view taken along the line BB of FIG.

22 (a), (b) and (c) are electrical circuit diagrams showing the operating state of the pinion.

FIG. 23 is a side sectional view showing a second embodiment of the starter of the present invention.

[Explanation of symbols]

1 housing 2 motor 3 pinion 5 magnet switch 6 link mechanism 7 Return spring 24 rotation axis 51a Plunger 64 arms 100 ring gear 210 pinion 214 uneven portion 220 output shaft 230 Pinion rotation restriction member 231 Control Claw 233 Return spring part 400 housing 500 motor section 510 shaft 550 fixed magnetic pole 600 magnet switch 610 Plunger 680 wire 682 recess 684 fixing screw

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masami Niimi 1-1-1, Showa-machi, Kariya city, Aichi Japan Denso Co., Ltd. (56) Reference JP-A-63-110931 (JP, A) JP-A-5 -332229 (JP, A) JP 59-37861 (JP, A) Actual development 63-74049 (JP, U) Actual development 57-36763 (JP, U) (58) Fields investigated (Int.Cl) . ⁷ , DB name) F02N 11/00 H02K 7/10 H02K 13/00

Claims (7)

(57) [Claims] 1. A plurality of field poles, an armature core arranged on the inner circumference of the field poles, to which an armature coil is mounted, a shaft rotatably holding the armature core, and the armature coil. A starter motor having an axial end surface and a commutator provided substantially orthogonal to the shaft, and a plunger having a fixed contact and a movable contact abutting the fixed contact. Then, attach this plunger to the suction coil.
By moving the movable contact to abut the fixed contact, while energizing the starter motor,
Wherein a magnet switch disposed commutator side of the starter motor, and a plurality of brushes in contact with the commutator face of the starter motor, on the outer peripheral side of the magnet switch, wherein the magnet
And a brush device that is disposed so as to overlap the suction coil of the switch in the axial direction and that has a biasing unit that presses the brush against the commutator surface. 2. The starter according to claim 1, wherein the urging means is a coil spring. 3. The starter according to claim 1, further comprising a brush holding member that slidably arranges the plurality of brushes, and the brush holding member is provided on a side opposite to the motor.
A starter having a storage unit for storing the magnet switch. 4. The starter according to claim 3, wherein a bearing that rotatably holds one end of the shaft of the starter motor is arranged in the center of the brush holding member. 5. The starter according to claim 3, wherein the brush holding member is made of a metal material. 6. The starter according to claim 1, wherein in the magnet switch, a plunger of the magnet switch is arranged substantially at a right angle to a shaft of the starter motor. Starter. 7. The starter according to claim 1, further comprising a cover that covers the magnet switch, and an axial direction in which the brush member is opened, the spring member being housed inside the cover. A starter characterized in that a storage portion extending to the inside is integrally formed.