JP2929954B2 - 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 seal structure for a window of a housing.

[0002]

2. Description of the Related Art A conventional starter for starting an engine includes a housing having a gear chamber that communicates with the outside through a window, a drive shaft housed in the gear chamber and having one end rotatably supported by a tip of the housing. A pinion gear that is fitted to the drive shaft in the gear chamber so as to be relatively rotatable and slidable in the axial direction, and that meshes with the ring gear through the window during forward movement.

[0003] In the conventional starter as described above, there is a problem in that sewage, mud, dust, and the like jump from the window into the gear chamber due to the rotating ring gear, and the inside of the gear chamber is soiled. To solve this problem, Nippon Denso Public Technical Report No. Nos. 54-052 and No. 5; 54-053 have been proposed. According to these proposals, the housing window is shielded by a window closing member that is linked to the forward and backward movement of the pinion, thereby preventing dirt, mud, dust and the like from entering the gear chamber when the pinion is at rest.

[0004]

However, in the above-described apparatus, when the pinion retreats, the tip of the pinion protrudes from the window of the housing, and the water that is lifted up by the ring gear from the outer periphery of the pinion is removed from the root of the pinion gear. There is a problem that water is concentrated in the housing and transmitted along the bottom of the tooth, so that the water enters the housing.

In addition, when the window opening / closing body advances with the pinion and meshes with the ring gear, no particular consideration is given to the dustproof structure. Further, in the case where the output shaft is supported by the tip of the housing, there is a structure in which the bearing is fixed by an open hole of the housing, and there is a problem that foreign matter enters the open hole.

An object of the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a starter capable of reliably preventing water from entering a housing.

[0007]

[Means of claim 1]

An output shaft that slidably holds a pinion that meshes with the ring gear of the engine in the axial direction; a window portion that rotatably supports one end of the output shaft and allows the pinion to advance and mesh with the ring gear; A housing having a protruding portion that protrudes to the tip of the pinion when retracted, a motor that rotates the output shaft,
Over that transmits rotation from the pinion to the ring gear
And running clutch includes a shielding portion covering the window portion of the housing, with respect to the housing of the shielding portion according to the movement to the ring gear side of the pinion only
And a window closing member to move. In addition, the pinion
Has a flange on the opposite side of this pinion from the ring gear.
The pinion is connected to the ring gear
When they are engaged with each other, they are arranged close to the protrusions.

According to a second aspect of the present invention, the overrunning clutch is provided on a rear side of the housing.
Is provided in the center bracket located inside the
I have. [Means of Claim 3] A ring portion provided on the pinion side of the shielding portion of the window opening / closing body, and a biasing means for pushing the ring portion toward the pinion side are provided.

A means for preventing wear is provided between the ring portion of the window opening / closing member and the pinion to prevent wear during relative rotation. [Means of claim 5] Sealing means is provided between the ring portion of the window opening and closing body and the pinion.

[0010] According to a sixth aspect of the present invention, a tip portion of the window opening / closing member has a closing portion for closing a through hole of the housing for supporting the output shaft when the pinion is not operated. . [Means of Claim 7] The ring portion of the window opening / closing means has a cylindrical portion provided to cover one end of the urging means and the outer periphery of the helical spline of the output shaft.

[Claim 8] [0011] Between the housing and the urging means, there is a cylindrical portion projecting toward the cylindrical portion and covering the outer periphery of the other end of the urging means, wherein the window is provided. By the cylindrical portion of the opening and closing means and the cylindrical portion,
The outer circumference of the urging means is covered. [Means of claim 9] A pinion meshing with the ring gear of the engine is slid in the axial direction.
An output shaft that is movably held and one end of this output shaft
The pinion moves forward and the ring
Window for meshing with the gear, and when the pinion is retracted
Has a protrusion projecting to the tip of the pinion
A housing and a shielding part for covering the window of the housing.
According to the movement of the pinion toward the ring gear.
A window opening and closing body for moving the shielding part by
The nonion has a flange on the non-ring gear side of this pinion.
During operation, this flange portion projects from the housing.
It is on the same plane as the projection .

[0012]

In the starter according to the first aspect, the window opening / closing member opens the opening of the housing when the pinion gear moves forward so that the pinion gear and the ring gear can mesh with each other, and closes the opening when the pinion gear moves backward. The water that is pumped up by the ring gear by covering the tip of the pinion with the projection of the housing,
It does not hit the pinion periphery directly. Thus, direct hit water can be stopped at the inlet to reduce the intrusion of water into the housing, and the durability of the sliding portion between the output shaft and the pinion can be greatly improved.

[0013] In the starter according to the second aspect, when the pinion engages with the ring gear, the protrusion of the housing includes:
Since the flange of the pinion is close and the protrusion of the housing is closed by the flange of the pinion, it is possible to prevent foreign matter such as water from entering even when the ring gear and the pinion gear are engaged. In the starter according to the third aspect, since the ring portion of the shielding portion of the window opening / closing member is pressed toward the pinion by the urging means, it is possible to provide a window opening / closing member that is linked to the pinion with a simple structure.

In the starter according to the fourth aspect, since the abrasion preventing member is provided between the ring portion of the window opening / closing body and the pinion, it is generated when the pinion operates and the window opening / closing body and the pinion rotate relative to each other. The abrasion of the window opening / closing body can be reliably prevented. In the starter according to the fifth aspect, since the seal member is provided between the ring portion of the window opening / closing body and the pinion, it is possible to reliably prevent water or the like entering from a gap between the ring portion and the pinion. it can.

In the starter according to the sixth aspect of the present invention, a closing portion for closing the through hole of the housing is provided at the tip of the window opening / closing body, so that when the pinion is not operated, the through hole is reliably closed by the closing portion, and It is not necessary to separately provide a member for preventing water while preventing water from entering the housing from the hole, and the number of parts can be reduced. In the starter according to the seventh aspect, since the opening / closing means has a cylindrical portion, the outer periphery of the biasing means and the helical spline of the output shaft can be covered by the cylindrical portion. When the pinion is retracted, water or the like that has entered the inside does not directly splash on the helical spline.

In the starter according to the eighth aspect, the cylindrical portion and the cylindrical portion of the opening / closing means allow the pinion to operate when the pinion is not operated.
It is possible to reliably prevent the urging means and the helical spline from being flooded.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, FIG.
A description will be given based on an embodiment shown in FIG. The starter includes a housing 40 that includes a pinion 200 and a planetary gear mechanism 300 that mesh with a ring gear 100 provided in the engine.
0, a motor 500, and an end frame 700 including the magnet switch 600. Further, inside the starter, the space between the housing 400 and the motor 500 is partitioned by the motor
0 and the end frame 700 between the brush holding member 90
It is partitioned by 0.

[Description of Pinion 200] FIG. 1 or FIG.
As shown in FIG. 2, a pinion gear 210 is formed on the pinion 200 so as to mesh with the ring gear 100 of the engine. An output shaft 220 is provided on the inner peripheral surface of the pinion gear 210.
Is formed with a pinion helical spline 211 which fits into the helical spline 221 formed at the bottom.

On the side opposite to the ring gear of the pinion gear 210, a flange 213 having a diameter larger than the outer diameter of the pinion gear 210 is formed in an annular shape. This flange 213
On the outer circumference of the pinion, irregularities 214 equal to or more than the number of external teeth of the pinion gear 210 are formed over the entire circumference. This unevenness 214
Is a regulating claw 23 of a pinion rotation regulating member 230 to be described later.
1 are for fitting. Washer 215
By bending an annular portion 216 formed at the rear end of the pinion gear 210 to the outer peripheral side, 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 composed of 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 a ring body 421 of a shutter 420 that will be described later.

[Explanation of Pinion Rotation Restriction Member 230] At one end of the rotation restriction portion 232, a restriction claw 231 serving as a restriction portion extending in the axial direction that fits into a large number of irregularities 214 formed on the flange 213 of the pinion gear 210 is formed. Is provided. The restricting claw 231 is fitted in the unevenness 214 of the pinion gear 210 and formed to be long in the axial direction and bent radially inward to form an L-shaped cross section in order to improve the rigidity of the restricting claw 231. Have been.
The operation of the pinion rotation regulating member 230 (having a rod shape) will be described. The string-shaped member 680 is a transmission unit that transmits the operation of the magnet switch 600 to the regulating claw 231.
By the operation of 0, the rotation restricting portion 232 is pulled downward, and the restricting claw 231 and the unevenness 214 of the flange 213 of the pinion gear 210 are engaged. At this time, the return spring portion 233
Is in contact with a regulation shelf 362 for regulating the position, and the return spring portion 233 bends. Since the regulating claw 231 is engaged with the unevenness 214 of the pinion gear 210, when the pinion gear 210 is to be rotated via the armature shaft 510 of the motor 500 and the planetary gear mechanism 300, the pinion gear 210 becomes helical spline of the output shaft 220. Advancing 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 rotating power of the output shaft 210, and the pinion gear 210 slightly rotates, and the ring gear Engage with 100. Then, when the pinion gear 210 moves forward, the regulating claw 231 becomes uneven 214
The restriction claw 231 falls behind the flange 213 of the pinion gear 210, the front end of the restriction claw 231 hits the rear surface of the washer 215, and prevents the pinion gear 210 from moving backward due to the rotation of the ring gear 100 of the engine.

[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 rounding a steel material having a rectangular cross section, and has substantially S-shaped unevenness 251 (an example of an engagement means) formed at each of both ends. Are engaged with the other concave portion, and the other convex portion is engaged with the one concave portion.

[Description of Planetary Gear Mechanism 300] As shown in FIG.
Is a speed reduction means for reducing the number of rotations of the motor 500 and increasing the output torque of the motor 500. The planetary gear mechanism 300 includes the motor 5
A sun gear 310 formed on the outer periphery of the front side of an armature shaft 510 (to be described later)
And a plurality of planetary gears 320 that rotate around the sun gear 310 and the planetary gears 32.
0 is rotatably supported around the sun gear 310, and a planet carrier 330 integrally formed with the output shaft 220;
At the outer periphery of the planetary gear 320, an internal gear 340 made of resin and having a cylindrical shape meshing with the planetary gear 320 is provided.

[Description of Overrunning Clutch 350] In the overrunning clutch 350, the internal gear 340 is supported so as to be rotatable only in one direction (only in a direction in which the engine rotates by receiving rotation of the engine). The overrunning clutch 350 is connected to the internal gear 34.
0, a clutch outer 351 forming a first cylindrical portion integrally formed on a front side of the front side and a rear surface of a center bracket 360 forming a fixed side for covering the front of the planetary gear mechanism 300,
The second clutch opposing the inner periphery of the clutch outer 351
And a roller 353 that is housed in a roller housing 351a formed to be inclined on the inner peripheral surface of the clutch outer 351.

[Explanation of Center Bracket 360] The center bracket 360 is arranged inside the rear side of the housing 400. One end of the housing 400 and the center bracket 360 is locked by the housing 400, and the other end is connected by a ring spring 390 locked by the center bracket 360, and a rotational reaction force received by a clutch inner 352 constituting the overrunning clutch 350. Is absorbed by the ring spring 390 and the reaction force is not transmitted directly to the housing 400.

[Description of Planet Carrier 330] The planet carrier 330 has a planetary gear 3 at its rear end.
20 is provided with a flange-shaped protrusion 331 extending in the radial direction to support the same. A pin 332 extending backward is fixed to the flange-shaped protrusion 331.
2 is a planetary gear 320 via a metal bearing 333.
Is rotatably supported.

The planet carrier 330 includes a housing bearing 440 having a front end fixed inside the front end of the housing 400 and a center bracket bearing 370 fixed inside the inner cylindrical portion 365 on the inner periphery of the center bracket 360. , Rotatably supported. The planet carrier 330 has an annular groove 334 at a front end position of the inner cylindrical portion 365, and a retaining ring 335 is fitted in the annular groove 334. A planet carrier 33 is provided between the retaining ring 335 and the front end of the inner cylindrical portion 365.
There is provided a washer 336 rotatably mounted on the inner surface of the inner cylindrical portion 365 via the washer 336 via the washer 336, so that the planet carrier 330 is prevented from moving backward. Is done. Further, the rear end of the center bracket bearing 370 supporting the rear side of the planet carrier 330 includes a flange portion 371 sandwiched between the rear end of the inner cylindrical portion 365 and the flange-shaped protrusion 331. Since the 331 abuts on the rear end of the inner cylindrical portion 365 via the flange portion 371, the planet carrier 330 is restricted from moving forward.

The rear surface of the planet carrier 330 is provided with a concave portion 337 extending in the axial direction.
The front end of the armature shaft 510 is rotatably supported via a planet carrier bearing 380 disposed therein. [Explanation of Housing 400] FIG.
Alternatively, as shown in FIG. 4, the output shaft 220 is supported by a housing bearing 440 fixed inside the front end of the housing 400, and the entrance of the opening 410 is reduced in order to minimize the entry of rainwater or the like from the opening 410. A water blocking wall 460 is provided at a lower portion and forms a protruding portion for minimizing a gap between the housing 400 and the outer diameter of the pinion gear 210 (see FIG. 1 or FIG. 3). In addition, two slide grooves 450 extending in the axial direction are provided in a lower portion of the front end of the housing 400, and the slide grooves
0 is provided.

[Description of Shutter 420] Shutter 420
Is made of a resin material (for example, nylon), and is mounted around the output shaft 220 as shown in FIGS.
The ring body 421 is sandwiched between the return spring 240 and the pinion gear 210, and a water blocking part 422 that opens and closes the opening 410 of the housing 400. As shown in FIG. 4, the water blocking portion 422 includes two slide grooves 4 formed in the lower part of the front end of the housing 400 and extending in the axial direction.
It is provided in a bent shape so as to be fitted into both sides of the 50. Thereby, the water blocking part 422 can be moved only in the axial direction with respect to the housing 400 together with the ring body 421. Note that a washer 480 is provided between the shutter 420 and the pinion gear 210.

In operation of the shutter 420, when the starter is activated and the pinion gear 210 moves forward along the output shaft 220, the ring body 421 moves forward together with the pinion gear 210. Then, the water blocking part 422 integrated with the ring body 421 moves forward, and opens the opening 410 of the housing 400 (see FIG. 8). 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 rearward together with the pinion gear 210. Then, the water blocking part 422 integral with the ring body 421 also moves rearward, and the opening 4
Close 10. As a result, the shutter 42 serving as the opening / closing means
A value of 0 prevents rainwater or the like scattered by the centrifugal force of the ring gear 100 or the like from entering the housing 400 by the water blocking portion 422 when the starter is not operated.

When the structure in which the return spring 240 directly urges the pinion gear 210 is adopted, the rotation of the pinion gear 210 is transmitted to the return spring 240, and the return spring 240 receives the rotational force and spreads. For this reason, conventionally, it is necessary to mount a rotation restricting member (for example, a washer) for preventing the rotation of the pinion gear 210 from being transmitted to the return spring 240 between the pinion gear 210 and the return spring 240. However,
In this embodiment, the rotation of the pinion gear 210 is controlled by the return spring 2 using the ring body 421 of the shutter 420.
Since a structure that is not transmitted to the motor 40 is adopted, there is no need to use a rotation restricting member, so that the number of parts can be reduced as compared with the related art, and assemblability is improved.

The tapered portion 2 is provided on the rear side of the output shaft 220.
A pinion helical spline 211 abuts against the tapered portion 222 so that the pinion gear 210 cannot move rearward from the tapered portion 222. Also, on the front side of the output shaft 220,
The pinion locking ring 250 is attached, and the pinion gear 2
10 cannot move forward from the pinion locking ring 250.

As shown in FIG. 1, when the starter is not operated, the front end face 210a of the pinion gear 210 does not protrude from the front end face 460a of the impermeable wall 460 of the housing 400 toward the ring gear 100. As shown, when the starter operates, the flange 213 of the pinion gear 210
The pinion gear 210 meshes with the ring gear 100 without coming into contact with the rear end surface 460b of the impermeable wall 460. In this way, it is possible to further prevent rainwater or the like scattered by the centrifugal force of the ring gear 100 from directly entering the housing 400.

The housing 400 and the pinion 210
Water partially entering the housing from the gap between the housing 400 and the housing 400 is discharged to the outside of the housing 400 from a drain hole (not shown). [Description of Seal Member 430] The seal member 430 is the same as that shown in FIG.
As shown in FIG. 10 and FIG. 10, an annular groove 430a is provided on the end face, and the return spring 2
One end of 40 is located. The seal member 430 seals the periphery of the output shaft 220, and
The rainwater, dust and the like entering through the opening 410 of the housing 400 are prevented from entering the housing bearing 440 at the front end of the housing 400.

[Description of Motor 500]
It is configured to be surrounded by a yoke 501, a motor partition wall 800, and a brush holding member 900 described later. The motor partition 8
00 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.

As shown in FIG. 1, the motor 500 includes an armature shaft 510 and the armature shaft 510.
Armature 540 composed of an armature core 520 and an armature coil 530 which are fixed to and integrally rotated.
(See FIG. 11) and a fixed magnetic pole 550 for rotating the armature 540. The fixed magnetic pole 550 is fixed to the inner periphery of the yoke 501.

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

[Explanation of Armature Coil 530] In the present embodiment, the armature coil 530 uses a plurality of (for example, 25) upper coil bars 531 and the same number of lower coil bars 532 as the upper coil bars 531. A two-layer coil in which the coil bar 531 and the lower coil bar 532 are laminated in the radial direction is employed. Then, each upper coil bar 531 and each lower coil bar 532 are combined, and the end of each upper coil bar 531 and each lower coil bar 532 are combined.
Are electrically connected to each other to form an annular coil.

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

[Description of Lower Layer Coil Bar 532] Like the upper layer coil bar 531, the lower layer coil bar 532 is made of a material (eg, copper) having excellent electrical conductivity, extends parallel to the fixed magnetic pole 550, and is held inside the slot 524. A lower coil side 536 to be formed and two lower coil ends 537 that are bent inward from both ends of the lower coil side 536 and extend in a 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 into a U-shape by pressing, similarly to the upper coil bar 531. Alternatively, the lower coil side 536 and the two lower coil ends 537 formed of different parts may be joined by a joining technique such as welding.

Insulation between each upper coil end 534 and each lower coil end 537 is ensured by an insulating spacer 560, and insulation between each lower coil end 537 and the armature core 520 is made of resin (for example, nylon or phenol). (Resin). The inner peripheral ends of the two upper coil ends 534 are provided with an upper inner extension 538 that extends in the axial direction. This upper inner extension 538
Is superimposed on the outer periphery of a lower inner extension 539 provided at an inner end of a lower coil bar 532 described later,
It is electrically and mechanically connected by a joining technique such as welding.
Further, the outer peripheral surface of the upper inner extension portion 538 is in contact with 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.

In this armature 540, the upper coil ends 534 of both ends of the upper coil bar 531 constituting the armature coil 530 and the lower coil ends 537 of both ends of the lower coil bar 532 are respectively opposed to the axial direction of the armature shaft 510. , Vertically. [Description of Fixed Magnetic Pole 550] The fixed magnetic pole 550 is fixed inside the yoke 501 by a fixed sleeve 553 disposed on the inner periphery of the fixed magnetic pole 550. In this embodiment, a permanent magnet is used. Instead of a magnet, a coil that generates a magnetic force when energized may be used.

[Explanation of Magnet Switch 600] As shown in FIG. 1, the magnet switch 600 is held by a brush holder 900 described later, is disposed in an end frame 700 described later, and is substantially movable with respect to the armature shaft 510. It is fixed to be vertical. When the magnet switch 600 is energized, the plunger 61
0 is moved upward to move integrally with the plunger 610 (a lower movable contact 611 and an upper movable contact 61).
2) is 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.

A plunger shaft 615 extending above the plunger 610 is fixed above the plunger 610. The plunger shaft 615 protrudes upward from a through hole provided at the center of the stationary core 642. An upper movable contact 612 is provided above the stationary core 642 of the plunger shaft 615.
Are slidably inserted in the vertical direction along the plunger shaft 615. This upper movable contact 612 corresponds to FIG.
As shown in FIG. 2, the retaining ring 616 attached to the upper end of the plunger shaft 615 restricts the upper end of the plunger shaft 615 from moving upward. As a result, the upper movable contact 612 becomes the retaining ring 616
And the stationary core 642 so as to be vertically slidable along the plunger shaft 615. The upper movable contact 612 is constantly urged upward by a contact pressure spring 670 formed 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. When both ends of the upper movable contact 612 move upward, the upper movable contact 612 comes into contact with two contact portions 631 provided on the fixed contact 630. Further, the respective lead wires 910a of the pair of brushes 910 are electrically and mechanically fixed to the upper movable contact 612 by caulking, welding, or the like.
Further, in the groove of the upper movable contact 612, the end of the resistor 617 serving as a plurality (two in this embodiment) of limiting means is provided.
It is inserted and is fixed electrically and mechanically.

The upper movable contact 612 has a brush 9
Although each of the ten lead wires 910a is electrically and mechanically fixed by caulking, welding, or the like, the upper movable contact 612 and each of the lead wires 910a of the brush 910 may be integrally formed. The resistor 617 is for rotating the motor 500 at a low speed at the initial stage of start-up of the starter, and is configured by winding a plurality of metal wires having a large resistance value. A 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 metal having excellent conductivity such as copper, and comes into contact with the upper surface of the stationary core 642 when the magnet switch 600 stops and the plunger 610 is located at a lower position. Moves upward with the movement of the plunger shaft 615,
The upper movable contact 612 is provided to contact the head 621 of the terminal bolt 620 before contacting the contact portion 631 of the fixed contact 630.

[Explanation of End Frame 700] As shown in FIG. 13, the end frame 700 is a magnet switch cover made of resin (for example, phenol resin) and houses the magnet switch 600 therein. A spring holding column 710 for holding a compression coil spring 914 for urging the brush 910 forward is provided on the rear surface of the end frame 700 so as to protrude forward according to the position of the brush 910.

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

The brush holder 900 is a partition formed by casting a metal such as aluminum by a casting technique. As shown in FIGS. 14 and 15, a plurality of brush holding holes 911 and 912 for holding the brush 910 in the axial direction are provided. In the embodiment, two are provided on the upper side and two are provided on the lower side. Upper brush holding hole 91
Reference numeral 1 denotes a hole for holding a brush 910 receiving a positive voltage. The upper brush holding hole 911 holds the brush 910 via an insulating cylinder 913 made of resin (for example, nylon or phenol resin). In addition, the lower brush holding hole 91
2 is a hole for holding a brush 910 that is grounded,
The lower brush holding hole 912 holds the brush 910 directly inside the hole.

As described above, since the brush 910 is held by the brush holder 900, there is no need to provide an independent brush holder in the starter. For this reason,
The number of parts of the starter can be reduced, and the number of assembling steps can be reduced. In addition, the brush 910 includes a compression coil spring 91.
4 urges the front end face against the rear face of the upper coil end 534 on the rear side of the armature coil 530.

[Operation of Embodiment] Next, the operation of the starter will be described with reference to the electric circuit diagrams of FIGS. 16 (a) to 16 (c). When the occupant sets the key switch 10 to the start position, electricity is supplied from the battery 20 to the attraction coil 650 of the magnet switch 600. When the attraction coil 650 is energized, the plunger 610 is attracted to the magnetic force generated by the attraction coil 650, and the plunger 6
10 rises upward from the lower position.

When the plunger 610 starts to rise, the upper movable contact 6 is moved with the rise of the plunger shaft 615.
12 and the lower movable contact 611 rise, and the rear end of the string-like member 680 also rises upward. String member 680
When the rear end rises, the front end of the string-shaped member 680 is pulled downward, and the pinion rotation regulating member 230 descends. The lower movable contact 611 is moved to the head 6
21 (see FIG. 16A). Terminal bolt 62
0, the voltage of the battery 20 is applied, and the voltage of the terminal bolt 620 is changed from the lower movable contact 611 to the resistor 61.
7 → upper movable contact 612 → transmitted to upper brush 910 via lead wire 910a. That is, the resistor 617
Is transmitted to the armature coil 530 via the upper brush 910. Then, the lower brush 910
Is always grounded via the brush holder 900, so that the armature coil 530 formed into a coil by combining each upper coil bar 531 and each lower coil bar 532 is supplied with a low voltage. Then, armature coil 530 generates a relatively weak magnetic force, and this magnetic force acts on (attracts or repels) the magnetic force of fixed magnetic pole 550, and armature 540 rotates at a low speed.

When the armature shaft 510 rotates,
The planetary gear 320 of the planetary gear mechanism 300 is driven to rotate by the sun gear 310 at the front end of the armature shaft 510. When the planetary gear 320 applies a rotational torque to the internal gear 340 via the planet carrier 330 to rotate the ring gear 100, the rotation of the internal gear 340 is restricted by the operation of the overrunning clutch 350. That is, since the internal gear 340 does not rotate, the rotation of the planetary gear 320 causes the planet carrier 330 to rotate at a reduced speed. When the planet carrier 330 rotates, the pinion gear 210 also tries to rotate, but the pinion gear 210 is rotated by the pinion rotation restricting member 230.
The rotation is regulated 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 abuts on the pinion locking ring 250. When the pinion gear 210 moves forward, the regulating claw 2
31 is disengaged from the unevenness 214 of the pinion gear 210, and then the front end of the regulating 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 advanced, the upper movable contact 612 is brought into contact with the contact portion 63 of the fixed contact 630.
Contact 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 coil bar 531 and the lower coil bar 532, and the armature coil 530 generates a strong magnetic force to rotate the armature 540 at high speed.

The rotation of the armature shaft 510 is reduced by the planetary gear mechanism 300 to increase the rotational torque, thereby driving the planet carrier 330 to rotate. At this time, the front end of the pinion gear 210 abuts on the pinion locking ring 250, and rotates integrally with the planet carrier 330. Since the pinion gear 210 meshes with the ring gear 100 of the engine, the pinion gear 2
Reference numeral 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 claw 231 that has fallen to the rear of the pinion gear 210 prevents the pinion gear 210 from retreating, prevents the pinion gear 210 from coming off early, and allows the engine to start reliably (see FIG. 16B). .

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 rotation torque transmitted from the ring gear 100 to the pinion gear 210 is transmitted to the pins 332 that support 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
0, the reverse running torque is applied when starting the engine.
Allow rotation of 00. That is, when a torque is applied to the internal gear 340 in a direction opposite to that at the time of engine start, the roller 353 of the overrunning clutch 350 is disengaged outside the concave portion 355 of the clutch inner 352, and the rotation of the internal gear 340 becomes possible. Become.

That is, the relative rotation of the ring gear 100 of the engine when the engine is started and the pinion gear 210 is rotationally driven 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 to the attraction coil 650 of the magnet switch 600 is stopped. When the energization of the suction coil 650 is stopped, 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
30, the lower movable contact 611 also separates from the head 621 of the terminal bolt 620, and the power supply to the upper brush 910 stops. When the plunger 610 is returned downward, the pinion rotation restricting member 230 returns upward by the action of the return spring portion 236 of the pinion rotation restricting member 230, and the restricting claw 231 is separated from the rear of the pinion gear 210. Then, the pinion gear 210 is returned backward by the action of the return spring 240, so that the pinion gear 210 is disengaged from the ring gear 100 of the engine, and the pinion gear 2
The rear end of the abutment 10 contacts 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. 16C).

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

[Effect of Embodiment] In this embodiment, when the starter is not operated, the front end face 210a of the pinion gear 210 is
The flange 213 of the pinion gear 210 does not protrude from the front end surface 460a of the water impervious wall 460 of the housing 400 toward the ring gear 100, and when the starter is operated, the flange 213 of the pinion gear 210 is moved to
The pinion gear 210 meshes with the ring gear 100 in the vicinity of the rear end surface 460b of the ring gear 100. In this way, it is possible to prevent rainwater or the like scattered by the centrifugal force of the ring gear 100 from directly entering the housing 400 by the water blocking portion 422. Thereby, the durability of the sliding portion between the pinion 210 and the output shaft 220 due to rust or mud is greatly improved.

[Embodiment 2] Embodiment 2 of the starter of the present invention
As shown in FIG. 17, the flange 213 of 210 may be substantially flush with the impermeable wall 460. Even in this case, as shown in the first embodiment, when the starter is operated, the flange 213 and the impermeable wall 460 are formed with a small gap,
Infiltration into the housing 400 due to the centrifugal force of the ring gear 100 can be reliably prevented.

[Embodiment 3] In Embodiment 3, as shown in FIG. 18, an opening 44 for a bearing 440 at the tip of a housing 400 is provided.
A closing portion 423 that closes 1 is formed integrally with one end of the water blocking portion 422. According to this, when the starter is not operated,
The housing 400 is opened from the opening 441 through the bearing 440.
The inside of the bearing 440 can be reliably prevented from entering the inside of the bearing 440 without adding another component for closing the new opening 441.

[Embodiment 4] FIG. 19 and FIG.
Description will be made based on 0. Shutter 420 shown in Embodiment 1
In comparison with the above, a cylindrical portion 424 extending cylindrically from the ring body 421 is integrally formed on the water shielding portion 422. The seal member 430 has an opening 431 that opens a portion where the shutter 420 slides, and has a substantially cylindrical portion 432 having an outer diameter smaller than the inner diameter of the cylindrical portion 424.

When the starter is not operated, as shown in FIG. 20, the end surface of the cylindrical portion 424 of the shutter 420 and the end surface of the substantially cylindrical portion 432 of the seal member 430 substantially coincide with the axial direction. Has been assembled. During the operation of the starter, the pinion 210 moves forward as shown by the broken line, contacts the pinion locking ring 250, and is restricted from moving. At that time, the cylindrical portion 424 of the shutter 420
The distal end of the cylindrical portion 424 is housed in the groove 401 of the housing 400 so as to overlap with the outer periphery of the substantially cylindrical portion 432 of the housing 30.

At this time, due to the rotation of the ring gear of the engine, water is sprayed into the housing 400 from the window 460 of the housing 400. Thereafter, the pinion 210 retreats and returns to the position shown in FIG. At this time, even if water or the like during the operation of the starter remains in the housing 400, the cylindrical portion 424 of the shutter 420
Since the outer circumference of the helical spline 221 is covered, water does not adhere to the helical spline 221 and the helical spline 21 can be reliably waterproofed even after the starter is operated.

[Embodiment 5] As shown in FIG.
Since the seal member 481 that seals between the ring body 421 of the shutter 420 and the pinion 210 is provided, it is possible to prevent foreign matter from entering through a minute gap between the shutter 420 and the pinion 210. [Embodiment 6] A starter according to a sixth embodiment of the present invention will be described with reference to FIGS.

A gear chamber 10 is formed in the housing 1 of the starter, and a window 11 is opened below the front of the gear chamber 10 near the ring gear 9. The front end 12 of the housing 1 rotatably supports the front end of the drive shaft 2, and the rear end surface of the front end 12 faces the front of the gear chamber 10. The drive shaft 2 is rotated by a starter motor (not shown). A guide hole 13 is formed in the front end portion 12 of the housing 1 above the drive shaft 2 and extends axially forward from the rear end surface of the front end portion 12.

A pinion gear 3 is fitted to the drive shaft 2 in the gear chamber 10 so as to be relatively rotatable and slidable in the axial direction. The pinion gear 3 can move forward with the rotation of the drive shaft 2 by a magnet switch or an inertia mechanism (not shown). At the front of the gear chamber 10, a window opening / closing body 4 which is located in front of the pinion gear 3 and is a feature of the present embodiment is installed.

The window opening / closing body 4 has a plate-like base 41 which is slidably fitted to the drive shaft 2 in a radially extending posture, and a base 4 which can open and close the window 11 by moving forward and backward.
1, a plate-shaped shielding portion 42 extending forward from the lower end,
1 is protruded axially forward from the upper part, and the tip end is a guide hole 1
3 includes a rod-shaped guide portion 43 fitted into the guide portion 3, and a coil spring 44 wound around the guide portion 43 and having a base end locked to the rear end surface of the distal end portion 12 of the housing 1. FIG.
FIG. 4 shows an enlarged perspective view of the window opening / closing body 4.

The base 41 is urged by a coil spring 44 and pressed against the front end face of the pinion gear 3 via the washer 5. The guide portion 43 and the coil spring 44 are provided as a pair. Further, the front end of the shielding portion 42 is always slidably in contact with the lower surface of the distal end portion 12 of the housing 1, and the posture of the window opening / closing body 4 is held by the guide portion 43 and the shielding portion 42 and interlocks with the pinion gear 3. To move forward and backward in the axial direction. The pinion gear 3 attempts to rotate the window opening / closing body 4 via the washer 5, but the rotation of the window opening / closing body 4 is restricted by the guide 43.

Reference numeral 6 denotes a collar fitted and fixed to the drive shaft. The forward movement of the pinion gear 3 is stopped by the collar 6 via the shielding portion 42 of the window opening / closing member 4 and the washer 5. The collar 6 is fitted in an annular groove formed in the drive shaft 2 by using elasticity. With this configuration, the window opening / closing body 4 is urged by the pinion gear 3 when the pinion gear 3 moves forward to open the window 11 so that the pinion gear 3 and the ring gear 9 can mesh with each other. The window 11 is blocked by being urged to retract with the pinion gear 3. Thus, in a state where the shielding portion 42 is most retracted, the shielding portion 42 almost completely shields the window 11, and water into the gear chamber 10 is removed.
Prevents intrusion of mud and dust. FIG. 23 is a front view of the central portion of the housing 1 of FIG.
FIG. 3 is an enlarged plan view of a main part of the housing 1 as viewed from below. As can be seen from FIG. 25, the left and right ends of the shielding portion 42 are also arranged so as to overlap the lower surface of the window peripheral portion of the housing 1 that defines the window 11. Further, a concave portion 42a is formed in the central portion in the left-right direction of the shielding portion 42 so as to swell slightly outward in the axial direction. 7 is a bearing metal.

[Modification] FIGS. 26 and 27 show other shapes of the shielding portion 42 of the window opening / closing member 4. FIG. A window opening / closing body having a structure that can be driven by the pinion gear 3 to open and close the window 11, such as a half-cylindrical cylindrical shape as shown in FIG. 26 or a stepped cylindrical shape as shown in FIG. 4
Can be changed.

[Embodiment 7] FIG. 28 shows another embodiment.
In this embodiment, a guide groove 17 accommodating a spring 16 is formed in the lower part of the distal end portion 12 of the housing 1 in the axial direction.
The shielding groove 42 of the window opening / closing body 4 can be accommodated in the guide groove 17.

Embodiment 8 FIG. 29 shows another embodiment.
In this embodiment, the shape of the window opening / closing body 4 obtained by combining the first and second embodiments is provided. In this embodiment, the spring 1
6 and one of the coil springs 44 can be omitted.

Embodiment 9 FIG. 30 shows another embodiment.
In this embodiment, guide grooves 18 are formed on both left and right sides of the lower end of the front end portion 12 of the housing 1 in the axial direction.
This guides both right and left ends of the shielding portion 42 of the window opening / closing body 4.

[Embodiment 10] Another embodiment is shown in FIG. In this embodiment, a coil spring 45 is disposed between the rear end surface of the front end portion 12 of the housing 1 and the base 41 of the window opening / closing body 4 so as to be inserted into the drive shaft 2.

[Embodiment 11] Another embodiment is shown in FIGS. In this embodiment, two slide grooves 45 extending in the axial direction are provided in the lower portion of the front end of the housing 400.
1 is provided. The slider 426 of the housing 400 is engaged with the slide groove 451,
0 is disposed in the housing 400. Shielding part 422
Is movable in the axial direction with respect to the housing 400.

As shown in FIG. 37, the shape of the shutter 420 is such that one end of the ring body 421 extends in the direction of the housing inner wall 461 of the housing 400, and the ring body 421 and the housing inner wall 461 have a slight gap so that they do not come into contact with each other. The other end of the ring body 421 extends in the direction of the ring gear 100. Further, the water blocking part 422 of the shutter 420
Has a water-impervious surface bent almost at the center. Note that one end of the ring body 421 does not abut the housing inner wall 461 even when the starter operates, as shown in FIG.

According to this configuration, the ring body 421 is extended toward the housing inner wall 461 and
Since the gap formed between the housing 1 and the housing inner wall 461 is set to be very small, it is possible to prevent water, oil, and the like from entering between the pinion 210 and the output shaft 220, thereby preventing poor sliding of the pinion 210. it can. Even if water, oil, or the like enters the housing 400, the housing 400
Is provided from a water drain hole (not shown) provided in the apparatus.

Also, since the water blocking portion 422 of the shutter 420 is bent substantially at the center, even if the water hits directly from the direction of the arrow shown in FIG. 38, the water is scattered and the water enters the housing 400. It has the effect of suppressing. Further, the slider 4
26 and the slide groove 451 form a labyrinth structure, which is effective for preventing intrusion of water, oil, and the like.

[Embodiment 12] FIGS. 39 and 40 show another embodiment. This embodiment is different from the eleventh embodiment in that a projection 425 is provided on the water blocking part 422 of the shutter 420 toward the ring gear 100. This convex part 425
As shown in FIG. 40, the window 41 of the housing 400
It is inclined with respect to 0.

According to this configuration, the shutter 420 has the projection 425 inclined with respect to the window 410 of the housing 400.
Is disposed, even if the water from the ring gear 100 hits the water blocking portion 422, the water is blocked by the convex portion 425, and the water or the like does not face the window 460, and the water or the like flows into the housing 400. Can be prevented from entering. In each of these embodiments, the same effect as in the first embodiment can be obtained.

In the above embodiment, the window opening / closing member 4 is moved forward by the forward movement of the pinion gear 3, and the window opening / closing member 4 is retracted by the coil spring 44.
As shown in FIGS. 32 and 33, an engaging portion (ring-shaped groove) 31 for engaging the U-shaped notch 41 of the base 41 of the window opening / closing body 4 is provided at the front end of the pinion gear 3, If the base 41 of the window opening / closing body 4 is rotatably fitted, the window opening / closing body 4 can be moved forward and backward by moving the pinion gear 3 forward and backward, and the coil spring 44 can be omitted.

In the above embodiment, the urging member for urging and pressing the window opening / closing body toward the pinion is provided between the housing and the base of the window opening / closing body. However, the shaft snap ring fitted to the output shaft is provided. And the base of the window opening and closing body, and the shaft snap ring may be integrated with the locking ring (collar).

[Brief description of the drawings]

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

FIGS. 2 (a) and (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. 3 is a side sectional view of a housing.

FIG. 4 is a front view of a housing.

FIG. 5 is a front view showing a state where a shutter is mounted on a housing.

FIG. 6 is a side view showing a state where a shutter is mounted on a housing.

FIG. 7 is an exploded perspective view showing a shutter.

FIG. 8 is a cross-sectional view of a main part showing a state where the pinion is operated.

FIG. 9 is a sectional view of a seal member.

FIG. 10 is a front view of the seal member.

FIG. 11 is a side sectional view of the armature.

FIG. 12 is a perspective view showing a plunger of the magnet switch.

FIG. 13 is a sectional view showing an end frame and a brush spring.

FIG. 14 is a longitudinal sectional view showing a brush holder.

FIG. 15 is a cross-sectional view showing a brush holder.

FIGS. 16 (a), (b) and (c) are electric circuit diagrams showing an operation state of a pinion.

FIG. 17 is a side sectional view showing a main part of a starter according to a second embodiment of the present invention.

FIG. 18 is a side sectional view showing a main part of a third embodiment of the present invention.

FIG. 19 is an exploded perspective view showing a shutter, a spring, and a seal member according to a fourth embodiment of the present invention.

FIG. 20 is a side sectional view showing a main part of the fourth embodiment.

FIG. 21 is a side sectional view showing a main part of a starter according to a fifth embodiment of the present invention.

FIG. 22 is an axial sectional view showing a main part of a starter according to a sixth embodiment of the present invention.

23 is an axial front view of the starter of FIG. 22.

24 is a perspective view of the window opening / closing body 4 of FIG.

FIG. 25 is a plan view of a main part of the starter of FIG. 22;

26 is a perspective view showing a modification of the window opening / closing body 4 of FIG.

FIG. 27 is a perspective view showing a modification of the window opening / closing body 4 of FIG.

FIG. 28 is an axial sectional view showing a main part of a starter according to a seventh embodiment.

FIG. 29 is an axial sectional view showing a main part of a starter according to an eighth embodiment.

FIG. 30 is an axial sectional view showing a main part of a starter according to a ninth embodiment.

FIG. 31 is an axial sectional view showing a main part of a starter according to a tenth embodiment.

FIG. 32 is an axial sectional view showing a main part of a starter according to another embodiment of the window opening / closing body.

FIG. 33 is a perspective view of the window opening / closing body 4 of FIG. 32.

FIG. 34 is an axial sectional view showing a main part of a starter according to an eleventh embodiment (in a state where the starter is not operated).

FIG. 35 is an axial sectional view showing a main part of a starter according to an eleventh embodiment (showing a state at the time of starter operation).

FIG. 36 is a perspective view of a shutter according to the eleventh embodiment.

FIG. 37 is a perspective view of a shutter according to the eleventh embodiment.

FIG. 38 is a front view showing a state where a shutter is mounted on the housing of the eleventh embodiment.

FIG. 39 is a perspective view of a shutter according to the twelfth embodiment.

FIG. 40 is a side view showing a state where the shutter is mounted on the housing of the twelfth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 2 Drive shaft 3 Pinion gear 4 Window opening / closing body 10 Gear chamber 11 Window 12 Tip part of housing 1 13 Guide hole 41 Base 42 Shielding part 43 Guide part 44 Coil spring (biasing part) 100 Ring gear 210 Pinion 213 Flange part 220 Output Shaft 221 Helical spline 240 Return spring 400 Housing 410 Opening 420 Shutter 421 Ring body 422 Water blocking part 423 Closing part 424 Tube part 430 Sealing member 440 Bearing

Continuing from the front page (72) Inventor Masami Niimi 1-1-1, Showa-cho, Kariya-shi, Aichi, Japan Inside Denso Corporation (72) Inventor Kenji Ogishima 1-1-1, Showa-cho, Kariya-shi, Aichi Japan Inside Denso Corporation ( 56) References JP-A-2-23055 (JP, A) Japanese Utility Model Application Sho 51-40713 (JP, U) Kazuhiro Yamaguchi, "Waterproof Structure of Starter", Nippon Denso Publications Technical Report, Nippon Denso Co., Ltd., 1987 July 15, Vol. 54, p. 53 (58) Field surveyed (Int.Cl. ⁶ , DB name) F02N 11/00

Claims (10)

(57) [Claims] 1. An output shaft for axially slidably holding a pinion meshing with a ring gear of an engine, and a window for rotatably supporting one end of the output shaft and for advancing the pinion to mesh with the ring gear. And a housing having a projection projecting to the tip of the pinion when the pinion is retracted, a motor for rotating the output shaft, and an automatic transmission for transmitting rotation from the pinion to the ring gear.
And a bar-running clutch includes a shielding portion covering the window portion of the housing, and a window opening and closing member to move with respect to said housing said shielding portion in response to movement to the ring gear side of the pinion only
The pinion is provided with a flange on the side opposite to the ring gear of the pinion.
A flange portion, and the flange portion has the pinion
When engaged with the ring gear, it is arranged close to the protrusion.
A starter characterized by being placed . 2. The overrunning clutch according to claim 1, wherein
Center bracket located inside the rear of the housing
The starter according to claim 1, wherein the starter is provided in the inside . 3. Before Kimado a ring portion provided on the pinion side of the shield portion of the closing member, and it has claim 1 if a biasing means for pressing the ring portion to the pinion side
Or the starter according to 2 . 4. The starter according to claim 3, wherein a wear prevention member for preventing wear during relative rotation is provided between the ring portion of the window opening / closing body and the pinion. . 5. The starter according to claim 4, wherein sealing means is provided between the ring portion of the window opening / closing body and the pinion. 6. An output shaft for slidably holding a pinion meshing with a ring gear of an engine in an axial direction, and a window for rotatably supporting one end of the output shaft and allowing the pinion to move forward and mesh with the ring gear. A housing having a portion and a protrusion projecting to the tip of the pinion when the pinion is retracted, and a shielding portion covering a window of the housing, wherein the pinion moves in response to movement of the pinion toward the ring gear. A window opening and closing body for moving the shielding part, at the tip of the window opening and closing body, when the pinion is not operated,
A starter having a closing portion for closing a through hole of the housing for supporting the output shaft. 7. The starter according to claim 3, wherein the ring portion of the window opening / closing means has a cylindrical portion provided to cover one end of the urging means and an outer periphery of a helical spline of an output shaft. 8. A cylindrical portion of the window opening / closing means, between the housing and the urging means, having a cylindrical part projecting toward the cylindrical portion and covering the outer periphery of the other end of the urging means. The starter according to claim 7, wherein the outer periphery of the urging means is covered by the portion and the cylindrical portion when the pinion is not operated. 9. A pinion meshed with a ring gear of an engine.
An output shaft that slidably holds the shaft in the axial direction, One end of the output shaft is rotatably supported, and the
Window for Nion to move forward and mesh with the ring gear
When the pinion is retracted,
A housing having a protrusion protruding at A shielding portion covering a window of the housing;
The shielding portion is turned on in response to the movement of the on to the ring gear side.
Window opening and closing body to move the The pinion is flush with the pinion on the side opposite to the ring gear.
When operating, the flange is attached to the housing.
Star on the same plane as the projection of the
Ta. 10. A motor for rotating the output shaft, An automatic transmission that transmits rotation from the pinion to the ring gear
Equipped with a bar running clutch, Moving only the pinion to the ring gear side
The starter according to claim 9, characterized in that: