JPS61210268A - Planetary reduction gear type reduction starter - Google Patents

Abstract

PURPOSE:To simplify a reduction starter in structure as well as to improve its assembling accuracy, by coupling a front bracket, having a bearing to make the rotation of a central sun gear in a planetary gear unit constituting a reduction mechanism a fulcrum shaft, with the V-type groove installed in the inner circumference of a yoke in a plastic flow manner. CONSTITUTION:An armature 2 of a motor 1 is rotatably supported by a shaft 3 and bearings 15 and 16, and its toque is transmitted to an armature pinion 4 solidly formed with the shaft 3. This armature pinion 4 constitutes the central sun gear of a planetary gear unit and unlike this, an internal gear ring gear 6 constitutes other sun gears, while plural planetary gears 7 are set up in an annular space 5 to be formed between them. At the above-mentioned, the bearing 15 is locked to a front cover 13, and the bearing 16 is locked to a front bracket 14. Then, this front bracket 14 is locked to the V-type groove installed in the inner circumference of the yoke by means of plastic flow coupling.

Description

[Detailed description of the invention] [Field of application of the invention] Misfire IMr! The present invention relates to a starter that includes a speed reduction mechanism between the rotation of the starter motor and the pinion, and particularly relates to a planetary g-speed reduction starter in which the rotation of the motor and the rotation axis of the pinion are coaxial.

[Background of the invention]

A drive system for an internal combustion engine for automobiles aimed at downsizing is disclosed in Utility Model Application Publication No. 58-132172, which uses a planetary reduction mechanism to coaxially align the rotation shaft of the motor and the rotation shaft of the pinion. A multi-type reduction starter has been proposed.

However, with the front bracket that supports the rotation of the fIL Isogo pinion formed at the tip of the machine shaft of the planetary reducer RI11 of the above-mentioned invention in the center, there is one internal tooth ring on the yoke T1 stone side of the motor on the left side, and a center plan. The structure is such that the gear case is fixed to the gear case with each bracket positioned at its own position.

Therefore, in order to ensure the axis center and perpendicularity of the 1 Isogo pinion and the output shaft, it is necessary to require a considerable amount of precision in each part, resulting in a complex structure and a reduction gear performance that is not fully realized. In this respect, it is extremely impractical.

[Purpose of the invention]

The object of the invention is to eliminate the drawbacks of the prior art described above, and to create a game room-table device with a simple structure and a simple assembly process.
The company aims to provide a planetary reduction type reduction starter with a new design.

[Summary of the invention]

In order to achieve this object, the invention is characterized in that the front bracket '5-, which supports the rotation of the region pinion, is fixed to the circumference of the yoke of the motor by plastic flow coupling. # Signs are marked.

[Embodiments of the invention]

Hereinafter, embodiments of a planetary reduction type ligction starter that is not inventive will be described with reference to the drawings.

In Fig. 1, it armature of motor 1 is connected to shaft 3 and bearing 1.
5 and 16, and its torque is transmitted to the rotor pinion 4, which is formed integrally with the rotor 3.

The Isogo pinion 4 constitutes the entire center sun gear 4 of the planetary Fs4 device, whereas the incisor ring gear 6 constitutes the outer sun gear t.
- Configure.

These t-mechanical pinion 4 and internal ring gear 6
In the annular space 5 formed between the two, for example, 31
II! The planet teeth 47 of I are arranged at equal intervals and meshed with each other to constitute a planetary gear device.

In order to be rotatable, the planet gear 7 is held by a support pin 8 via, for example, a needle bearing, and this support pin 8 is fixed to a planet arm 9.

The planetary arm 9 is integrally formed with a pinion shaft 10.
0 is rotatably supported by bearings 19 and 20 relative to a gear case 17 and a centerpiece 18.

As a result, planetary force 7 is able to revolve around pinion $1110 while rotating around support pin/8.

The gear cover 26 is an elastic body made of rubber, for example, and covers the outer circumference of the inner ring gear 6.
is attached with a predetermined elasticity to the internal ring gear 6.
is gear-coupled to the side surface of the center bracket 18 using its tooth profile.

The n1 bearing 16, which is fixed to the bearing 15rilJ cover 13, is fixed to the circumference of the yoke 22 and the front bush 2 socket 14d to which the front bush 2 socket bearing 16 is fixed, by plastic flow coupling.

The details of the plastic flow connection are shown in Figure 2, and the yoke 22
Two VFl*27 provided at predetermined positions on the circumference 22a of
Pressure is locally applied to the outer circumferential portion 14a of the front bracket 14 inside the V-groove 2 so that a part of the material of the front bracket 14 is inserted into the V-groove 2.
7, and the formation dimensions and implementation procedure will be explained in more detail with reference to FIG. Groove width w of the two V ties 27 provided on the circumference 22a of the yoke 22, #II angle θ
, yoke inner diameter DI, front bracket 14 outer diameter Do
In the embodiment, the dimensions of s plate thickness t, claw height a1 of the movable punch 28 for applying local VC pressure to the outer circumference 14a (FIG. 2) of the 70-tont bracket 14 are as follows: I'm in the middle of the day.

w = 0.3~0.8 θ=90°D t = 73~7 a, 05 Do ~72.95~73 t=2~2.6 a = 0145~0.6 b = o, s or more The components consisting of the components are sequentially attached to the yoke 22 on the fixed base 29.
, set one shaft of the front bracket, and locally apply pressure to the outer circumference of the front bracket 14 using the pressure punch 28 (37). After zero pressure, the state is as shown in FIG. 2.

The center bracket 18 to which the bearing 20 is fixed has an outer circumference 1
8a is stored in the spigot 17a of the gear case 17,
Further, the yoke 22 is also housed in the inlet a-17a.

(Fixing bolt 21, carrier cover 13, yoke 22 that fixed one front bracket axis, and two center pins)
18 is fixed to the gear case 17, and by tightening the fixing bolt 21, the internal tooth ring mis
The gear cover 26 provided on the front knob 2 is sandwiched between the front flap 2 bracket 14 and the center hub 2 bracket 1B, and is pressed into contact with a predetermined elastic force.

Now, when one power is supplied to starter motor l, armature 2
generates torque and rotates the armature shaft 3, which is transmitted to the pinion shaft 10 under a predetermined reduction ratio via a planetary gear arrangement consisting of an armature pinion 4, an internal ring gear 6, and a planetary gear 7. As a result, the pinion shaft 10 is rotated with a large torque.

The rotation of the binion MljJ10 is transmitted to the binion 12 via the spline and the low 2 clutch 1it-nl.Furthermore, when the magnet switch 23 is attracted, the puller lever 24 pushes the clutch sleeve 25, and the rotation of the pinion 12 and It is transferred to the pinion 12 so as to mesh with the ring gear (not shown) of the internal combustion engine, and the engine is started.

[Young fruit of invention]

As explained above, according to the present invention, by fixing one front bracket shaft to the circumference of the yoke 22 by heavy flow coupling, only the center bracket 18 is housed in a part of the spigot of the gear case 17. In addition, since the yoke 22 is fixed to the same spigot,
It becomes easy to ensure axis accuracy and perpendicularity, and the effect of implementing non-inventions is significant.

[Brief explanation of the drawing]

Fig. 1 is a front sectional view of the main parts of the planetary reduction type reduction starter according to the present invention, Fig. 2 is an elemental sectional view showing the fixing structure of the front bracket, and Fig. 3 is! FIG. 2 is a congratulatory diagram of the main parts of the components, explaining FIG. 2 in more detail.

Claims (1)

[Claims] 1. In a coaxial reduction starter equipped with a planetary gear device as a reduction mechanism, in which the axis of the central sun gear is the input shaft and the revolution axis of the planetary gear is the output shaft, a bearing that uses the rotation of the central sun gear as the supporting axis is used. A planetary reduction type reduction starter characterized in that a front bracket is fixed to the inside of the yoke by plastic flow coupling to a V-shaped groove provided on the circumference of the yoke.