JPS61101670A - Starter equipped with planetary reduction gear mechanism - Google Patents

Abstract

PURPOSE:To permit to simplify and ensure the fixing of a supporting pin by a method wherein a plate, to which the supporting pin, supporting a planetary gear, is fixed and a clutch outer of a mono-directional clutch are provided as independent bodies while both of them are connected by a fixing means. CONSTITUTION:The supporting pin 21, supporting the planetary gears of the planetary reduction gear mechanism, is fitted into the hole 26a of a column type plate 26 forcively. On the other hand, the plate 26 is formed with a protuberance 26b, configured so as to be along a cam chamber 23a at the inner periphery of clutch outer 23 formed separately from the plate 26. Further, rollers 24 are arranged between the cam chamber 23a of the clutch outer 23 and a clutch inner 8c and the mono-directional clutch is constituted of these clutch outer 23, rollers 24 and clutch inner 8c. The protuberance 26b of the plate 26 is engaged with the inner circumference of the cam surface 23a of the clutch outer 23, thereafter, both of the clutch outer 23 and the plate 26 are covered by a clutch cover 22 at the outer peripheral sides thereof and both of them are fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a starter with a planetary gear reduction mechanism for starting an engine.

[Conventional technology]

In the conventional clutch, as shown in Japanese Utility Model Application No. 58-96060, the support pin that supports the planetary gear is fitted into a hole provided in the cam heel of the clutch outer of a one-way clutch, thereby securing the cam heel. Since the hole is made in the thick part and the support pin is fitted, the hole will not close even if the one-way clutch acts and the inner circumferential surface of the clutch outer is subjected to the pressing force of the rotor. This prevents deformation and prevents the support pin from being removed from the hole.

[Problem that the invention seeks to solve]

However, in the conventional device described above, the support pin that supports the planetary gear is fitted into the hole in the cam heel portion of the clutch outer, so there is a risk that the clutch outer may be deformed when the support pin is fitted. In addition, the number of support pins is regulated by the number of cam heel parts of the clutch outer, and when arranging support pins at equal intervals, it is necessary to set the number of cam heel parts to a certain value. There is a problem in that it interferes with

Therefore, the present invention provides support pins that support planetary gears without being limited by the number of cam heel parts of the clutch outer.
Fix securely.

[Means for solving problems]

In a starter with a planetary gear reduction mechanism that reduces the rotation of the scooter motor by a planetary gear reduction mechanism and transmits the rotation to the pinion via a one-way clutch, a support pin that supports the planetary gear of the & star gear reduction mechanism is fixed. plate and
The present invention provides a starter with a planetary gear reduction mechanism in which the clutch outer of the unidirectional clutch is provided separately, and the plate and the Rj clutch outer are connected by a fixing means.

〔Example〕

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

As shown in FIGS. 1 to 4, 1 is an armature core of a starter motor, and an armature coil 2 is wound around the outer periphery of the armature core 1. As shown in FIGS.

A fixed iron core 19 fixed to the inner periphery of the yoke 17 and an excitation coil 18 wound around the outer periphery of the fixed iron core 19 are arranged on the outer periphery of the armature core I. An armature shaft 20 passes through the center of the armature core 1. This armature shaft 20 is rotatably held by a holding member 16 held and fixed between a yoke 17 and a center housing 13 via a bearing 16a.

Further, a sun gear 2 is provided on the outer periphery of the armature shaft 20.
0a is formed, and the planetary gear 14 meshes with this sun gear 20a. An internal gear 15 meshes with the outer peripheral side of this planetary gear 14.
is fixed between the holding member 16 and the center housing 13. And the sun gear 20a, the planetary gear 14,
The internal gear 15 constitutes a planetary gear reduction mechanism. A support pin 21 that supports the planetary gear 14
is the cylindrical plate 2 shown in Fig. 4 (al, (bl)
It is press-fitted into the hole 26a of G. The plate 26 also includes a clutch outer 23 shown in FIGS.
A protrusion 26b in the shape of a clover is formed along the cam chamber 23a on the inner periphery of the cam chamber 23a. A roller 24 is arranged between the cam chamber 23a of the clutch outer 23 and the clutch inner 8C,
This roller 24 transmits rotational power from the clutch outer 23 to the clutch inner 8C, and prevents rotational power from being transmitted in the opposite direction. The clutch outer 23, roller 24, and clutch inner 8C constitute a one-way clutch. 25 is a washer for holding down the roller 23. After fitting the protrusion 26b of the plate 26 to the inner periphery of the cam surface 3a of the clutch outer 23, the talatch cover 22 serving as a fixing means is placed over the outer periphery of the plate 26 and the clutch outer 23. The plate 26 is fixed to the clutch outer 23 by winding the end of the -22. The clutch inner 8C is formed at the end of the drive shaft 8.

One end of the drive shaft 8 is connected to the center housing 13
is held through a ball hair ring 12, and the other end is
It is rotatably held in the housing 4 via a bearing 9. Further, a helical spline 8a is formed on the outer periphery of the drive shaft 8, and the spline tube 6 is spline-coupled to the helical spline 8a. A pinion 6a is formed at one end of the spline tube 6. A stopper 7 whose movement is restricted by a washer 10 is provided on the outer periphery of the end of the drive shaft 8, and this stopper 7 restricts the movement of the pinion 6a in the axial direction. A ring gear 11 of the internal combustion engine is arranged at a position where it meshes with the pinion 6a. 3 is a magnetic switch, and along with the movement of a plunger (not shown),
The lever 5 engaged with the outer periphery of the spline tube 6 is pulled toward the magnet switch 3, and the pinion 6a is moved toward the ring gear 11.

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

The magnet switch 3 is activated to attract the lever 5 and move the spline tube 6 to the ring gear 11 side. Then, when the pinion 6a comes into contact with the ring gear 11, the contacts of the magnetic switch 3 close, starting to energize the starter motor, and rotating the armature shaft 20. The rotation of this armature shaft 20 is then decelerated via the sun gear 20a and the planetary gear 14.

In addition, this decelerated rotation is transmitted through the plate 26, clutch outer 23, roller 24, and clutch inner 8C.
It is transmitted to the drive shaft 8. Then, the spline tube 6 spline-coupled with the helical spline 8a of the trifle shaft 8 is rotated, and the pinion 6a is meshed with the ring gear 11. Then, the rotation of the pinion 6a is transmitted to the ring gear 11 to rotate the ring gear 11 and start the engine.

In the above-described embodiment, the plate 26 is provided with a protrusion 26a, which fits into the inner circumferential surface of the clutch outer 23. A convex portion may be formed and the convex-concave fitting may be performed.

Further, although the plate 26 and the clutch outer 23 are fixed by the clutch cover 22, they may be fixed by other fixing means such as adhesive or screws.

〔Effect of the invention〕

As described above, in the present invention, the clutch outer and the plate that supports the support bins that support the planetary gears are separately provided and each is fixed. Moreover, there is an excellent effect that the support pin is not affected by deformation due to the pressing force of the roller of the clutch outer, and can be reliably fixed to the plate.

[Brief explanation of the drawing]

FIG. 1 is a sectional front view showing the essential parts of an embodiment of the starter of the present invention, FIG. 2 is an enlarged sectional front view showing the essential parts of the above-mentioned embodiment, and FIG. FIG. 4 (al, (bl) is a plan view, a half-sectional front view, and a half-sectional front view of the clutch outer applied to the above-described embodiment, respectively. 1... Armature core, 3... Magnet switch, 6a... Pinion, 14, 15. 20a... Planetary gear, internal gear, sun gear each forming a planetary gear reduction mechanism, 21... Support pin, 22...・Clutch cover, 8c, 23, 24...clutch inner, each forming a one-way clutch.Clutch outer, roller, 26...plate.

Claims (1)

[Claims] A starter with a planetary gear reduction mechanism that reduces the rotation of the starter motor by the planetary gear reduction mechanism and transmits the rotation to the pinion via a one-way clutch, comprising: a plate for fixing a support pin that supports a planetary gear of the planetary gear reduction mechanism; ,
A starter with a planetary gear reduction mechanism, in which a clutch outer of the one-way clutch is provided separately, and the plate and the clutch outer are connected by a fixing means.