JPS6272927A - Friction clutch - Google Patents

Abstract

PURPOSE:To absorb inverse load out of a driven shaft, by installing a slider sliding on the driven shaft and also a slider spring pressing this slider to the side of a clutch inner, and letting the slider support a clutch spring. CONSTITUTION:A slider 20 is being inserted into the spline 19 installed in a driven shaft 3 free of slide motion in the axial direction. A clutch spring 15 is engaged with one side of a spring stopper 23 solidly molded together with this slider 20, and a slider spring 24 with the other side, respectively, and that this spilder spring 24 presses the slider 20 to the side of a clutch inner 13. In addition, a slider cam 21 at a side part of the slider 20 and an inner cam 22 being installed in the clutch inner 13 are engaged with each other. So, when inverse load acts on them, the slider 20 moves in the axial direction by means of cam functions of these inner and slider cams 22 and 21, thus the inverse load is absorbed.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a multi-disc friction clutch installed in a power transmission device of a motorcycle or the like.

[Technical past of invention and its problems]

This type of multi-disc +111ff clutch includes a cylindrical clutch housing driven by a crankshaft, a clutch inner connected to a driven shaft, and a suppressor that presses a plurality of clutch plates and clutch discs that are engaged with these, respectively, by a clutch spring. The power from the engine is transmitted to the rear wheels via the transmission, but if an excessive backload is applied to the driven shaft due to sudden engine braking, for example, the engine or transmission will be damaged. Excessive force is applied to the device and the vehicle body that supports the rear wheels, significantly reducing durability.

[Purpose of the invention]

The present invention was made in consideration of these circumstances, and when a reverse load from the driven shaft acts between the clutch inner and the driven shaft, it absorbs the excessive reverse zero load from the test io@. The object of the present invention is to provide a friction clutch that prevents the friction from being transmitted to the drive side.

(Summary of the Invention) In order to achieve the above-mentioned object, the present invention includes a clutch housing driven by a drive source, a clutch inner connected to a driven shaft, and a plurality of clutch plates and clutch discs respectively engaged with these. , a friction clutch comprising the clutch plate and a pressing body that presses the clutch disc with a clutch spring,
When a reverse load is applied from the driven shaft, the slider engages with a cam integrally provided on the clutch inner and slides on the driven shaft, and the slider is pushed toward the clutch inner. The present invention is characterized in that a slider spring is provided, and the slider supports a clutch spring.

(Embodiments of the invention) Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 4 shows a motorcycle engine. Power from the engine, which is a driving source, is transmitted to a crankshaft 1, and the transmitted power is transmitted to a driven shaft by a drive gear 2 provided on a crankshaft 11 and a foot 1. The signal is transmitted to a driven gear 4 rotatably mounted on the countershaft 3. The power transmitted to driven gear 4 is 11Jl! It is transmitted to the countershaft 3 via the A-Kurazuji device 5,
Subsequently, the signal is transmitted to the drive shaft 7, sprocket 8, and chain 9 via the transmission 6, and drives the rear wheels (not shown).

l? ! The friction clutch arrangement 5 is constructed as shown in FIG. 1, and has a cylindrical clutch housing 11 attached to the driven gear 4 via a damper 10. A plurality of grooves 11a are formed on the cylindrical surface of the clutch housing 11 at a distance t, and protrusions on the outer circumference of the clutch plate 12 are engaged with these grooves 11a. The clutch plate 12 is attached to the clutch housing 11 so as to be integral with the clutch housing 11 in the rotational direction and to be drivable in the axial direction.

Further, a clutch inner 13 rotatably supported on the counter shaft 3 is disposed on the inner periphery/part of the clutch housing 11, and a groove 138 is formed in the outer periphery of the clutch inner 13. . A protrusion on the inner peripheral portion of the clutch disc 14 engages with this n13a. The clutch disks 14 are stacked alternately with the clutch plates 12 in the axial direction, and the clutch disks 14 are integrally attached to the clutch inner 13 in the rotational direction and slidably in the axial direction.

Furthermore, the side surface of the clutch plate 12 is pressed by the elastic force of the clutch spring 15 in the form of a disc spring.
A body 16 is installed, and this suppressing body 16 frictionally engages the clutch plate 12 and the clutch disc 14. In addition, a bushing piece 17 is slidably fitted in the shaft holes 1 to 30 of the counter shirt, and this bushing piece 17 is driven in the axial direction by the rotation of the clutch release 180 to engage and engage the friction clutch device. It has become.

The counter shaft 3 is provided with one spline, and a slider 20 is inserted into this spline 19 so as to be slidable in the axial direction and integrally in the rotational direction. slider 20
A convex slider cam 21 is integrally formed on the side of the clutch inner 13, and this slider cam 21 engages with a concave inner cam 22 that is integrally provided on the clutch inner 13.

Furthermore, a spring stopper 23 is integrally molded on the slider 20, and a clutch spring 15 is engaged with one side of the spring stopper 23, and a slider spring 24 is engaged with the other side of the spring stopper 23. The slider spring 24 is made of two 110 springs tied together, and the slider 20 is placed one on the inner side of the clutch, and the spring is biased in the direction of deepening the engagement between the slider cam 21 and the inner cam 22. There is. The slider spring 24 is set to have a larger spring constant than the clutch spring 15.

Next, Ifj! The cavity clutch action will be explained.

In normal driving conditions, when power is transmitted from the motorcycle engine to the rear wheel, the slider cam 21 is connected to the slider spring 24.
As shown in FIG. 1 J3 and FIG. 2, it is deeply engaged with the inner cam 22, and the power transmitted to the clutch inner 13 is transmitted from the power transmission surface 22a of the inner cam 22 to the slider cam 21. It is transmitted to the slider 20 via the surface 21a, and from the slider 2o to the countershaft 3. At this time, the clutch spring 15 presses the suppressor 16 with a predetermined elastic force, and provides sufficient frictional force between the clutch plate 12 and the clutch disk 14 to transmit the driving force.

On the other hand, when power is transmitted from the contact wheels to the engine due to sudden engine braking, the reverse load transmitted to the countershaft-3 is transmitted to the slider 19, and from the cam action surface 21b of the slider cam 21 to the inner cam 22.
is transmitted to the cam action surface 22b, but the cam action surface 21
b and 22b are formed obliquely to each other, so the action of this cam causes the slider 20 to connect to the clutch inner 13 with the reverse load transmission surface 2IC of the slider cam 21 and the inner cam 22.
It undergoes relative rotation while moving in the axial direction to a position where the reverse load transmission surface 22c abuts.

At this time, the slider spring 24 is compressed by the axial movement of the slider 20, and one end of the clutch spring 15, which is engaged with the spring provided integrally with the slider 20 and the collar 24, moves, and the clutch spring 15 is moved. is extended and pushes the pressing body 16 in the axial direction, and the elastic force is weakened. Therefore, the frictional force between the clutch plays 1 to 12 and the clutch disc 14 decreases, and the excessive reverse C
``J/iη is absorbed by the J slip between the clutch plate 12 and the clutch disk 14.

[Efficacy of invention Song Dynasty]

The present invention has a structure similar to that of a manure, so that under normal driving conditions, the frictional force between the clutch brakes 1 and the clutch disc is sufficient to transmit the driving force, and the reverse reaction caused by severe engine braking is prevented. When a load is applied, the slider moves in the axial direction by the cam action of the inner cam and slider cam, weakening the elastic force of the clutch spring and reducing the frictional force between the clutch plate and clutch disk. Because it can be absorbed
It prevents excessive force from acting on the vehicle body that supports the engine, transmission, and rear wheels, and improves reliability and durability.

[Brief explanation of drawings]

FIG. 1 shows an embodiment of the friction clap according to the present invention 71
The vertical cross-sectional view, Figure 2 J3 and Figure 3 are 1? FIG. 4, which is a diagram for explaining the clutch action of the friction clutch, is a plan view of the engine in the motorcycle. 3... Counter shaft, 11... Clutch housing, 12... Clutch plate, 13... Clutch inner, 14... Clutch disc, 15... Clutch spring, 16... Pressing body, 20 ...Slider, 2/1...Slider spring. $ 1 Figure 2 Figure 3 Figure $ 4 Figure

Claims (1)

[Claims] A clutch housing driven by a drive source, a clutch inner connected to a driven shaft, a plurality of clutch plates and clutch discs respectively engaged with these, and a pressing body that presses the clutch plates and clutch discs with a clutch spring. The friction clutch includes a slider that engages with a cam integrally provided on the clutch inner and slides on the driven shaft when a reverse load is applied from the driven shaft; A slider spring that presses on the side is provided,
A friction clutch characterized in that the slider supports a clutch spring.