JPS5843672Y2 - Internal combustion engine clutch device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a clutch device used in a small internal combustion engine such as a motorcycle.

More specifically, ACG (A
A clutch mechanism consisting of a C generator), a centrifugal clutch, and a starting clutch is installed, and the ACG flywheel is used to support the centrifugal expansion type connecting member of the centrifugal clutch and function as the friction face of the starting clutch mechanism, resulting in a simple structure. This invention relates to a clutch device that aims to reduce the number of parts and reduce the number of parts.

Clutch mechanisms for small motorcycles and the like are equipped with centrifugal clutches and one-way clutches as starting clutches.

The clutch mechanism is installed at one end of the crankshaft, and a flange-shaped driven member and a drive plate are installed between the same axles, and between these, a starting one-way clutch is connected to the driven member by a centrifugal expansion type on the drive plate side when the drive plate is expanded. A connector is provided, and the ACG is installed on the other end of the crankshaft.
is provided.

In the above, the crankshaft is driven via the drive plate using a starting one-way clutch, and when the crankshaft is started, the connector on the drive plate is expanded and connected to the driven member, and the engine output is transferred from the driven member via the transmission mechanism, etc. Output.

In the conventional mechanism described above, the clutch mechanism and ACG are provided at both the left and right ends of the crankshaft, so a separate drive plate is required as the clutch mechanism, which increases the number of parts and complicates the structure. The ACG and clutch mechanism are installed separately at both ends of the crankshaft, which complicates the structure and increases the number of assembly steps.Furthermore, it is undesirable for line work to assemble them separately from both ends. Because of the provision of each, the length of the crankshaft and its surrounding parts also increases, and the width of the crankcase, etc. increases.

The inventors of the present invention have developed the present invention in view of the above-mentioned problems in the conventional mechanism in which a clutch mechanism and an ACG are separately provided at both ends of the crankshaft, and to effectively solve these problems.

The purpose of the present invention is to provide a clutch mechanism consisting of an ACG, a centrifugal clutch mechanism, and a starting clutch mechanism on one end of the crankshaft, and use the ACG flywheel to support the centrifugal expansion type connector of the centrifugal clutch and operate the starting clutch. To provide a clutch device which functions as a friction face.

Therefore, the object of the present invention is to make the ACG flywheel function as a drive plate, thereby eliminating the need for the drive plate, its fixing means, and its attached parts, thereby reducing the number of parts. The structure can be simplified, and since the clutch mechanism and ACG are arranged on one end of the crankshaft, it is also favorable in terms of assembly.In addition to reducing costs including the above, the width of the crankcase can be shortened. can also be planned,
A clutch device that also contributes to compactness is provided.

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The drawing shows a longitudinal cross-sectional view of the main parts, and the crankshaft 1 is connected to a piston (not shown) by a connecting rod 2 via a pin 3, and weights 4.4 are provided on the left and right sides of the pin 3, and the weights 4, 4 are connected outwardly. The journal 5 of the section is the crankcase 6
is supported via a bearing 7 on the support section of the.

The extending portion 8 of the journal 5 of the crankshaft 1 is provided with the following members.

In other words, the ACG flywheel 9 is attached to the end of the extending portion 8.
is connected to the crankshaft with a key 10, bolts 11, etc. so that it rotates integrally with the crankshaft, and a flywheel magnet 12, etc. is fixed to the inner wall of the outward facing flange portion 9a of the flywheel 9. Ancillary equipment is provided on the cover 13 side.

A sleeve 14 is fitted onto the crankshaft extension 8 in front of the ACG flywheel 9, and a gear 15 and a driven member 16 are tied and loosely connected on the sleeve 14, and the driven member 1
A friction type or pawl type starting (starting) clutch 17 is interposed on the sleeve 14 between the base 16b of the ACG flywheel 6 and the opposing base 9b of the ACG flywheel 9, and the clutch 17 is a one-way clutch, and this latch 17 15.

And the ACG flywheel 9 facing the clutch 17
The base 9b of the drive plate constitutes the friction face of the drive plate.

On the other hand, a centrifugal clutch weight, that is, a centrifugal expansion type connector 19 is pivotally mounted on a portion near the outer periphery of the disc portion 9c of the ACG flywheel 9 via a pin 18. It is arranged so as to face the inner diameter part of the flange portion 6a extending in the direction of the plate portion 9c.

A gear 20 is fixed on the base of the extending portion 8 with a pin 21 between the inner end of the sleeve 14 including the gear 15 and the bearing 7.

Next, the operation of the clutch device described above will be explained. A starting input is input to the gear 15 and the starting clutch 17, and in this case, the driven member 16 is also driven.

The input to the starting clutch 17 is input to the flywheel 9 via the base 9b of the ACG flywheel 9 that prevents friction faces, and drives the crankshaft 1 via the input to the extension 8 to perform starting.

After starting, the connector 19 pivoted on the ACG flywheel 9 expands centrifugally at a predetermined rotational speed to open the flange portion 1 of the driven member 16.
6a and drives the gear 15.

Together with the gear 15, the gear 20 integrated with this on the extension part 8 is also driven and output, and the gear 15 can store power in the power storage starting mechanism or serve as a low-speed drive gear. In this case, the gear 20 may be set to the high speed side, and the output and subsequent settings can be arbitrarily set.

As is clear from the above, according to the present invention, a clutch mechanism consisting of an ACG, a centrifugal clutch mechanism, and a starting clutch mechanism is provided on one end side of the crankshaft, and the ACG flywheel supports and starts the centrifugal expansion type connector of the centrifugal clutch. Since the function of the friction face of the clutch is maintained, the ACG flywheel functions as a drive plate, and therefore, there is no need for a drive plate, a means for fixing the same, and accessories thereof.

Therefore, the number of parts is reduced, the structure is simplified, contributing to cost reduction, and since the clutch mechanism and ACG are arranged on one end of the crankshaft, it is easier to assemble, which is convenient for manufacturing. It is highly practical as it can shorten the width and contribute to compactness.

[Brief explanation of the drawing]

The drawing is a longitudinal cross-sectional view of a main part showing an embodiment of the present invention. In the drawings, 1 is a flank shaft, 9 is an ACG flywheel, 9b is an engagement surface, 17 is a starting clutch, and 19 is a centrifugal clutch connector.

Claims (1)

[Scope of utility model registration request] ACG (AC generator) at one end of the crankshaft
A clutch mechanism consisting of a centrifugal clutch, a one-way starting clutch, and a centrifugal expansion type connector of the centrifugal clutch is pivotally mounted on the ACG flywheel.
A clutch device for an internal combustion engine, characterized in that a disc surface of a flywheel that faces a starting one-way clutch is configured as a locking surface.