JPS6081427A - Driving device of outer generator for small automobile - Google Patents

Abstract

PURPOSE:To install a large-sized generator, by installing a turning shaft of a drive pulley for generator driving in a crankcase cover, while coupling the turning shaft with a crankshaft. CONSTITUTION:A driving device of an outer generator for a small automobile is set up at the outside of a crankcase 3. A drive pulley 7 is set up in an outer end part of a turning shaft 6 while a joint 8 in the inner end part, respectively. Turning power in the crankshaft 4 makes the generator rotate via the joint 8, the drive pulley and a V-belt 9. Thus, since bending stress due to tension in the belt will not act on the crankshaft 4, durability is securable and, what is more, a large-sized generator can be installed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drive device for an external generator for a small automobile.

For power generation and production in small vehicles, especially motorcycles and tricycles, a rotor is installed at the end of the crankshaft, a stator is installed on the cover of the crankcase (magnetic cover), and the rotor rotates together with the crankshaft. Power is generated by

Incidentally, recent small vehicles such as motorcycles and tricycles have increased the number of electrical parts and equipment, and as a result, overhead generators have become necessary. Therefore, even in these small cars, a so-called external double-engine generator is used, in which the generator is installed at a location away from the crankshaft.
It has become necessary to adopt a mechanism that transmits the rotational power of the crankshaft to the rotor of the α machine via a belt and rotates the rotor.

However, conventional motorcycles and tricycles, which have lighter and more compact engines,
The crankshaft is thin and the crankcase is made of aluminum alloy, etc., so its rigidity is low.In addition, the crankshaft rotates at a high speed, so a pulley is installed directly on the crankshaft, and the belt is wrapped around this pulley. If an attempt is made to rotate the rotor of the generator via the belt, bending stress due to belt tension will act on the crankshaft, which may not only break the crankshaft but also significantly reduce its durability.

The purpose of non-invention is in view of these problems.

An object of the present invention is to provide a drive device for an external generator, which requires only slight changes to the engine of a conventional small automobile and can provide sufficient durability.

In other words, by uninventively installing the rotation shaft of the drive pulley on the crankcase cover independently of the crankshaft, and connecting the rotation shaft to the crankshaft via a joint, the The stated objectives have been achieved.

The present invention will be described below with reference to embodiments shown in the drawings. Figure 1 shows an external generator 1 according to the present invention and its IJ.
I @device it. The generator 1 is fixed to the outside of a transmission case or the like via a bracket. In this generator 1, a rotating shaft of a rotor (not shown) projects toward the transmission case, and a driven pulley 2 is disposed there.

FIG. 2 shows an enlarged view of the drive device shown in FIG. This drive device is installed on the outside of the crankcase 3, and a cover 5 installed so as to extend over the end of the crankshaft supports rotation @6, and a drive pulley 7 is attached to the outside end of the rotating shaft. .

A joint 8 is disposed at the inner end, through which the rotational power of the crankshaft 4 is transmitted to the rotating shaft 4, and the drive pulley 7, V-belt 9. The rotor of the generator 1 is rotated via the driven pulley 2, and is a single unit. The rotating shaft 6 is formed to have substantially the same shaft diameter as the crankshaft 4, and is rotatably supported by the cover 5 by ball bearings 10 and 11. And this rotation [l! 1
On one end face of l16.

The center of the drive pulley 7 is positioned by a pin I2 and fastened by a bolt 13.

Further, a triangular flange 6a as shown in FIG. 3(a) is formed at the other end of the rotating shaft 6, and a pin 14 is implanted around the periphery of the flange. on the other hand.

A ring gear 15 is fixed to the end of the two-link shaft 4, and a damper housing 16 is fixed to the circumferential surface of the post 15a of the ring gear. This damper housing J6
As shown in FIG. 3(b), a boss 17 is formed on the peripheral side surface, a recess e17a is formed in the boss 1''7, and a hole 16a is formed between the bosses L7. The damper housing 16 configured in this manner is connected to the ring gear 1 by the rivet 18 through the hole 16a.
It is fixed to the side of 5. On the other hand, the rotary shaft 6 and the damper housing 16 are connected to the concave apl? a, and the recess and pin J4 are connected to each other via a rubber ring 19. A pickup 20 is installed at an appropriate location on the outer periphery of the damper housing 16, and a pulser 21 is fixed to the cover 5 so as to face the pickup.

Such an external generator drive device operates as follows. When the crankshaft 4 rotates, the ring gear 15 and the damper housing 16 rotate together with the crankshaft. The rotational force is transmitted from the damper/crank 16 to the annular rubber 19.
is transmitted to the pin 14 via the flange 6h, and further transmitted to the rotation shaft 6 via the flange 6h.

The rotation shaft is rotated. Along with this, drive pulley 7
is rotated, the driven pulley 2 shown in FIG. 1 is rotated via the belt 9, and the rotor of the generator 1 is rotated.

Therefore, in this external generator drive device, the bending stress due to the tension of the V-belt 9 is all applied to the cover 5 via the rotating shaft 6 and the bearings 10 and 11, and has almost no effect on the crank 4Q4. Moreover, the centering of the crankshaft 4 and the rotating shaft 6 does not have to be exact because the error is allowed by the annular rubber.

FIG. 4 shows another embodiment of the present invention. The drive device of this exterior type generator employs 22 flywheels in addition to the ring gear 15 in the drive device shown in FIG. This Fushii wheel 22 was used as a rotor for an internal type starter, and a ring gear 15' was mounted on its outer circumference, and a pickup 2
0 is also set.

Note that the other elements are the same as those shown in FIG. 2, and the operation of the drive device is also almost unchanged, so a description thereof will be omitted.

In the above embodiment, the pin 14 and the annular rubber 16 are connected between the rotating shaft 6 and the ring gear 15 or the flywheel 22.
Although they are connected by a damper means consisting of a damper housing 16, it is also possible to construct a damper means in which, for example, a coil spring is interposed between the one-rotation shaft 6 and the ring gear 15 or the flywheel 22. The interposition of such a damper means that the rotating shaft 6 and the ring gear 1
5 or between the flywheels 22, which is advantageous in preventing breakage of pins, loosening of bolts, etc.; however, the present invention does not necessarily require a damper means.

Further, in the above embodiment, a structure is adopted in which the pin 4 is fitted into the hole 17a of the damper housing 16 as the joint 8, but a general dog joint can also be used in the present invention.

As described above, in the drive device for an external generator for a small automobile according to the present invention, the drive pulley is supported on a rotating shaft independent of the crankshaft, so that bending stress due to the tension of the belt is not applied to the crankshaft. Therefore, there is no risk of deteriorating the durability of the crankshaft, crankcase, etc.

Therefore, by using the uninvented bending device, a large generator can be installed in a small car that has conventional internal generators by simply changing or adding a few parts. .

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional plan view of the essential parts showing the drive device and the generator of an exterior generator for small automobiles according to the invention, Fig. 2 is an enlarged plan view of the main parts, and Fig. 3 (a) is the FIG. 3(b) is a side view showing the rotating shaft, FIG. 3(b) is a side view showing the damper, and FIG. FIG. 1... Generator, 2... Driven pulley, 3... Crank case, 4... Crankshaft, 5... Cover,
6... Rotating shaft, 6a... Flange, 7... Drive pulley, 8... Joint, 9... V belt %1υ,
11...Bearing, 12...Pin, [3...
Bolt, 14...Pin, 15...Ring gear, 16
...damper housing, 16a...hole, 17...
Boss, 17a... recess, 18... rivet, 1
9... dovetail rubber, 2o... pickup, 21...
・Pulsar, 22...) 5 Iwheel. Applicant Suzuki Motor Co., Ltd. Fourth Cause

Claims (2)

[Claims] (1) A rotating shaft is supported on the extension of the crankshaft in the cover of the crankcase, and an exterior generator driving pulley is disposed at the outer end of the rotating shaft, and an inner end of the rotating shaft is supported. A drive device for an exterior generator for a small automobile, characterized in that the drive device is connected to an end of the crankshaft via a joint. (2) The drive device for an exterior generator for a small automobile as set forth in claim (1), wherein the joint has a damper means.