JP-2026075032-A - Clutch device

JP2026075032AJP 2026075032 AJP2026075032 AJP 2026075032AJP-2026075032-A

Abstract

[Problem] To ensure sufficient pressure contact between the drive-side clutch plate and the driven-side clutch plate. [Solution] The clutch device 10 comprises a clutch center 40, a pressure plate 70, a centrifugal clutch mechanism 120 having a plurality of weight members 122, and a clutch spring 25 that presses the pressure plate 70 in conjunction with the operation of the centrifugal clutch mechanism 120. The clutch spring 25 is configured to press the pressure plate 70 in a first direction D1 by the movement of the weight members 122 from a radially inward position PI1 to a radially outward position PO1, thereby bringing the drive-side clutch plate 20 and the driven-side clutch plate 22 into contact. The end 25D1 of the clutch spring 25 in the first direction D1 is located on the second direction D2 side of the pressure plate 70 and is further to the second direction D2 side than the end 77D1 of the fitting teeth 77 of the pressure plate 70 in the first direction D1. [Selection Diagram] Figure 1

Inventors

成山佳宏

Assignees

株式会社エフ・シー・シー

Dates

Publication Date: 20260507
Application Date: 20250314

Claims (4)

A clutch device for transmitting or interrupting the rotational driving force of an input member to an output member, A clutch center is housed in a clutch housing that holds a plurality of drive-side clutch plates which are rotationally driven by the rotational drive of the input member, and which is rotationally driven together with the output member, A pressure plate is provided so as to be able to approach or move away from the clutch center, and holds all of the multiple driven clutch plates which are arranged alternately with the drive clutch plate, and is capable of pressing the drive clutch plate and the driven clutch plate. A centrifugal clutch mechanism having a plurality of weight members that can move from a first position in which the contact force between the drive-side clutch plate and the driven-side clutch plate is released as the centrifugal force increases due to the rotation of the clutch housing, thereby blocking the transmission of the rotational driving force of the input member to the output member, to a second position in which the drive-side clutch plate and the driven-side clutch plate are brought into contact, enabling the transmission of the rotational driving force of the input member to the output member; The output member comprises a pressure contact member located between the drive-side clutch plate, the driven-side clutch plate, and the clutch housing in the axial direction of the output member, When the direction in which the pressure plate approaches the clutch center is defined as the first direction, and the direction in which the pressure plate moves away from the clutch center is defined as the second direction, the pressure contact member is configured to move axially in the second direction as the weight member moves from the first position to the second position, thereby bringing the drive-side clutch plate and the driven-side clutch plate into contact. The aforementioned pressure plate is The outer peripheral wall of the output member extends in the axial direction and is formed in an annular shape when viewed from the axial direction of the output member, The clutch plate on the driven side is held by all of the aforementioned clutch plates, and a plurality of fitting teeth arranged in the circumferential direction are formed to protrude radially outward from the outer surface of the outer wall, It comprises a plurality of spline grooves formed between adjacent mating teeth, The aforementioned pressure-welding member is A clutch device having a pressing surface located radially outward from the aforementioned mating teeth and capable of pressing against the drive-side clutch plate or the driven-side clutch plate.
The clutch center is, The first clutch center connected to the output member, It comprises a second clutch center mounted to the first clutch center so as to be movable in the axial direction, The clutch device according to claim 1, wherein the pressure contact member is provided on the outer circumference of the second clutch center.
The clutch device according to claim 2, wherein the end face of the mating tooth on the first direction side faces the second direction side surface of the second clutch center.
The clutch device according to claim 1, wherein, in the state in which the weight member is positioned in the first position, the end face of the fitting tooth on the first direction side is located on the second direction side of the drive clutch plate that is the closest to the first direction among the plurality of drive clutch plates.

Description

This invention relates to a clutch device. Motorcycles and other saddle-type vehicles are equipped with a clutch device capable of transmitting and interrupting the rotational driving force of a drive source such as an engine to the drive wheels. For example, Patent Document 1 discloses a clutch device having an input member connected to the engine side, an output member connected to the drive wheel side, a clutch member (hereinafter referred to as the clutch center) connected to the output member, and a pressure member (hereinafter referred to as the pressure plate) that can move closer to or further away from the clutch center. Patent Document 1 also discloses a centrifugal clutch means in which a weight member moves from a first position to a second position due to centrifugal force accompanying the rotation of the clutch housing, causing the drive-side clutch plate and the driven-side clutch plate to press against each other. Japanese Patent Publication No. 2022-030211 Figure 1 is a cross-sectional view showing a part of the clutch device according to the first embodiment.Figure 2 is an exploded perspective view of the clutch center and pressure plate according to the first embodiment.Figure 3 is a perspective view of a pressure plate according to the first embodiment.Figure 4 is a cross-sectional view showing a part of the clutch device according to the first embodiment.Figure 5A is a schematic diagram illustrating the operation of the center-side assist cam surface and the pressure-side assist cam surface.Figure 5B is a schematic diagram illustrating the operation of the center-side slipper cam surface and the pressure-side slipper cam surface.Figure 6 is a cross-sectional view showing a part of the clutch device according to the first modified example.Figure 7 is a cross-sectional view showing a part of the clutch device according to the second modified example.Figure 8 is a cross-sectional view showing a part of the clutch device according to the second embodiment.Figure 9 is a perspective view of the centrifugal clutch mechanism according to the second embodiment.Figure 10 is a cross-sectional view showing a part of the clutch device according to the second embodiment. The embodiments of the clutch device according to the present invention will be described below with reference to the drawings. It should be noted that the embodiments described herein are not intended to limit the present invention. Furthermore, the same reference numerals are used for components and parts that perform the same function, and redundant explanations are omitted or simplified as appropriate. <First Embodiment> Figure 1 is a cross-sectional view showing a part of the clutch device 10 according to the first embodiment. The clutch device 10 is installed in a vehicle such as a motorcycle. The clutch device 10 is a device that transmits or interrupts the rotational driving force of an input member (crankshaft) of a drive source (e.g., engine) of a motorcycle to an output shaft 15. The clutch device 10 is a device for transmitting or interrupting the rotational driving force of the input member to a drive wheel (rear wheel) via the output shaft 15. The clutch device 10 is arranged between the drive source and the transmission. The output shaft 15 is an example of an output member. In the following description, the direction in which the pressure plate 70 of the clutch device 10 approaches and moves away from the clutch center 40 is denoted as direction D, the direction in which the pressure plate 70 approaches the clutch center 40 is denoted as the first direction D1, and the direction in which the pressure plate 70 moves away from the clutch center 40 is denoted as the second direction D2. Furthermore, the circumferential direction of the clutch center 40 and the pressure plate 70 is denoted as the circumferential direction S, the direction from one pressure-side cam portion 90 toward the other pressure-side cam portion 90 (the direction from one center-side cam portion 60 toward the other center-side cam portion 60) toward the circumferential direction S is denoted as the first circumferential direction S1 (see Figure 3), and the direction from the other pressure-side cam portion 90 toward the one pressure-side cam portion 90 (the direction from the other center-side cam portion 60 toward the one center-side cam portion 60) is denoted as the second circumferential direction S2 (see Figure 3). In this embodiment, the axial direction of the output shaft 15, the axial direction of the clutch housing 30, the axial direction of the clutch center 40, and the axial direction of the pressure plate 70 are the same as direction D. Furthermore, the pressure plate 70 and the clutch center 40 rotate in the first circumferential direction S1 (i.e., the direction from the center-side assist cam surface 60A to the center-side slipper cam surface 60S of one center-side cam portion 60). However, the above direction is merely defined for the