JP-7855149-B2 - Clutch device

JP7855149B2JP 7855149 B2JP7855149 B2JP 7855149B2JP-7855149-B2

Inventors

志水亮太
吉本克
曾恒香
伊藤柊治

Assignees

株式会社エフ・シー・シー

Dates

Publication Date: 20260507
Application Date: 20250312
Priority Date: 20240325

Claims (20)

A clutch device for transmitting or interrupting the rotational driving force of an input shaft to an output shaft, A clutch center is housed in a clutch housing that holds a plurality of input-side rotating plates which are rotated by the rotational drive of the input shaft, and which rotates together with the output shaft, A pressure member is provided so as to be able to approach or move away from the clutch center, and holds at least a portion of a plurality of output-side rotating plates arranged alternately with the input-side rotating plate, and is capable of pressing the input-side rotating plate and the output-side rotating plate. The clutch housing has a plurality of weight members configured to move from an inner radial position to an outer radial position by the centrifugal force accompanying its rotation, and the centrifugal clutch mechanism is capable of pressing the input side rotating plate and the output side rotating plate together when the weight members are in the outer radial position, thereby enabling the transmission of the rotational driving force of the input shaft to the output shaft, and releasing the pressing force between the input side rotating plate and the output side rotating plate when the weight members are in the inner radial position, thereby blocking the transmission of the rotational driving force of the input shaft to the output shaft. The centrifugal clutch mechanism described above is: A holding member that holds the weight member so as to be movable between the radially inner position and the radially outer position, A biasing member provided on the holding member, which biases the weight member inward in the radial direction, The device comprises a pressure contact member having a pressure contact side sliding portion provided to be in contact with the weight member, and which moves in the axial direction of the output shaft as the weight member moves from a radially inner position to a radially outer position, thereby bringing the input side rotating plate and the output side rotating plate into pressure contact, The aforementioned weight member is A plane extending in a direction intersecting the axial direction of the output shaft, comprising a weight-side sliding portion that is slidable relative to the pressure-contact-side sliding portion, At least one of the aforementioned pressure-contact side sliding portion and the aforementioned weight-side sliding portion is an inclined surface that is inclined with respect to the axial direction of the output shaft. A clutch device in which, when the direction in which the pressure contact member approaches the weight member is defined as the first direction, and the direction in which the pressure contact member moves away from the weight member is defined as the second direction, in a cross-sectional view in a plane including the axial direction and the radial direction of the output shaft, the surface of the weight member facing the second direction that is radially inward of the weight-side sliding portion is located on the first direction side of the weight-side sliding portion .
The aforementioned weight member is A biasing member holding portion for holding the biasing member, A plane extending in a direction intersecting the axial direction of the output shaft, comprising a first plane that is slidable with respect to the holding member , The first plane is provided on one side in the circumferential direction of the biasing member holding portion, The clutch device according to claim 1, wherein the weight-side sliding portion is located on the opposite side of the first plane with respect to the axial direction of the output shaft.
The clutch device according to claim 2, wherein the weight member is provided on the other side in the circumferential direction from the biasing member holding portion and has a second plane that extends in a direction intersecting the axial direction of the output shaft and is slidable relative to the holding member.
The biasing member holding portion includes a holding wall that holds the radially inner end of the biasing member, The clutch device according to claim 3, wherein the radially inner end of the first plane and the radially inner end of the second plane are located radially inward from the retaining wall.
The radially outer ends of the first plane and the second plane are located radially outward from the radially inner end of the weight-side sliding portion. The clutch device according to claim 3, wherein the radially inner ends of the first plane and the second plane are located radially inward from the radially inner end of the weight-side sliding portion.
The clutch device according to claim 5, wherein the radial lengths of the first and second planes are longer than the radial length of the weight-side sliding portion.
The clutch device according to claim 3, wherein the combined area of the first and second planes is greater than the area of the weight-side sliding portion.
The clutch device according to claim 3, wherein the circumferential length from one end of the first plane in the circumferential direction to the other end of the second plane in the circumferential direction is longer than the circumferential length of the weight-side sliding portion.
The clutch device according to claim 3, wherein a plurality of biasing members are provided between the first plane and the second plane in the circumferential direction.
The clutch device according to claim 3, wherein, in a cross-sectional view in a plane including the axial direction and the radial direction of the output shaft, a straight line passing through the radial center of the pressure-contact side sliding portion and parallel to the axial direction of the output shaft passes through the first plane and the second plane when the weight member is located on the radially outer side.
The aforementioned contact-side sliding portion is a contact-side inclined surface that is inclined with respect to the axial direction of the output shaft. The clutch device according to claim 3, wherein the weight-side sliding portion is a weight-side inclined surface that is inclined with respect to the axial direction of the output shaft and slides against the pressure-contact side inclined surface.
A clutch device for transmitting or interrupting the rotational driving force of an input shaft to an output shaft, A clutch center is housed in a clutch housing that holds a plurality of input-side rotating plates which are rotated by the rotational drive of the input shaft, and which rotates together with the output shaft, A pressure member is provided so as to be able to approach or move away from the clutch center, and holds at least a portion of the plurality of output-side rotating plates arranged alternately with the input-side rotating plate, and is capable of pressing the input-side rotating plate and the output-side rotating plate. The clutch housing has a plurality of weight members configured to move from an inner radial position to an outer radial position by the centrifugal force accompanying its rotation, and the centrifugal clutch mechanism is capable of pressing the input side rotating plate and the output side rotating plate together when the weight members are in the outer radial position, thereby enabling the transmission of the rotational driving force of the input shaft to the output shaft, and releasing the pressing force between the input side rotating plate and the output side rotating plate when the weight members are in the inner radial position, thereby blocking the transmission of the rotational driving force of the input shaft to the output shaft. The centrifugal clutch mechanism described above is: A holding member that holds the weight member so as to be movable between the radially inner position and the radially outer position, The weight member moves from the radially inner position to the radially outer position, thereby moving in the axial direction of the output shaft, causing the input side rotating plate and the output side rotating plate to press against each other. The output shaft comprises a cylindrical member provided between the weight member and the holding member with respect to the axial direction of the output shaft, extending in a direction intersecting the radial direction, and rolling relative to the weight member and the holding member, A clutch device wherein the weight member is formed on a surface facing the holding member, and holds the cylindrical member such that a part of the cylindrical member protrudes from the surface of the weight member facing the holding member toward the holding member, and includes a guide portion that guides the radial movement of the cylindrical member.
The clutch device according to claim 12, wherein the guide portion comprises a first restricting portion that restricts the circumferential movement of the cylindrical member, and a second restricting portion that restricts the radial movement of the cylindrical member beyond a predetermined distance.
The clutch device according to claim 13, wherein the guide portion has a recess in the direction toward the weight member from the holding member with respect to the axial direction of the output shaft, and has a receiving groove that accommodates a part of the cylindrical member.
The clutch device according to claim 14, wherein the first regulating portion and the second regulating portion define the receiving groove.
The centrifugal clutch mechanism includes a biasing member provided on the holding member, which biases the weight member inward in the radial direction. The clutch device according to claim 12, wherein, in a cross-sectional view in a plane including the axial direction and the radial direction of the output shaft, when the weight member is located on the inside in the radial direction, at least a portion of the cylindrical member overlaps with the biasing member.
The biasing member includes a first biasing member and a second biasing member arranged in the circumferential direction. The clutch device according to claim 16, wherein the cylindrical member is located between the first biasing member and the second biasing member with respect to the circumferential direction.
The centrifugal clutch mechanism includes a biasing member provided on the holding member, which biases the weight member inward in the radial direction. The clutch device according to claim 12, wherein, in a cross-sectional view in a plane including the axial direction and the radial direction of the output shaft, when the weight member is located on the inside in the radial direction, at least a portion of the guide portion overlaps with the biasing member.
The aforementioned pressure-contacting member has a pressure-contacting side sliding portion provided to be in contact with the weight member, The weight member has a weight-side sliding portion that is slidable with respect to the pressure-contact side sliding portion, At least one of the aforementioned pressure-contact side sliding portion and the aforementioned weight-side sliding portion is an inclined surface that is inclined with respect to the axial direction of the output shaft. The clutch device according to claim 12, wherein, in a cross-sectional view in a plane including the axial direction and the radial direction of the output shaft, a straight line passing through the radial center of the pressure-contact side sliding portion and parallel to the axial direction of the output shaft passes through the guide portion when the weight member is located on the radially outer side.
The aforementioned pressure-contacting member has a pressure-contacting side sliding portion provided to be in contact with the weight member, The weight member has a weight-side sliding portion that is slidable with respect to the pressure-contact side sliding portion, At least one of the aforementioned pressure-contact side sliding portion and the aforementioned weight-side sliding portion is an inclined surface that is inclined with respect to the axial direction of the output shaft. The clutch device according to claim 12, wherein when the weight member is located on the radially outer side and viewed from the axial direction of the output shaft, at least a part of the pressure contact side sliding portion and the guide portion overlap.

Description

This invention relates to a clutch device. Motorcycles and other saddle-type vehicles are equipped with a clutch device capable of transmitting and disconnecting 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 (hereinafter referred to as the input shaft) connected to the engine side, an output member (hereinafter referred to as the output shaft) connected to the drive wheel side, a clutch member (hereinafter referred to as the clutch center) connected to the output shaft, and a pressure member that can move closer to or further away from the clutch center. Furthermore, the clutch device described in Patent Document 1 includes a centrifugal clutch mechanism comprising a weight member that moves radially and a holding member that houses the weight member. The weight member moves from an inner radial position to an outer radial position due to the centrifugal force accompanying the rotation of the clutch housing, and is configured to transmit the engine's driving force to the wheels by pressing the drive-side clutch plate (hereinafter referred to as the input-side rotating plate) and the driven-side clutch plate (hereinafter referred to as the output-side rotating plate) into contact. Japanese Patent Publication No. 2022-30211 Figure 1 is a cross-sectional view of a clutch device according to the first embodiment.Figure 2 is a perspective view of the first clutch center according to the first embodiment.Figure 3 is a perspective view of the first clutch center according to the first embodiment.Figure 4 is a perspective view of the second clutch center according to the first embodiment.Figure 5 is a plan view of the second clutch center according to the first embodiment.Figure 6 is a perspective view of the pressure member according to the first embodiment.Figure 7 is a perspective view of the pressure member according to the first embodiment.Figure 8A is a schematic diagram illustrating the operation of the center-side assist cam surface and the pressure-side assist cam surface.Figure 8B is a schematic diagram illustrating the operation of the center-side slipper cam surface and the pressure-side slipper cam surface.Figure 9A is a perspective view showing a part of the centrifugal clutch mechanism according to the first embodiment, and is a plan view showing the weight member positioned radially inward.Figure 9B is a plan view showing a part of the centrifugal clutch mechanism according to the first embodiment, and is a plan view showing the state in which the weight member is located radially inward.Figure 10 is a plan view showing a holding member according to the first embodiment.Figure 11 is a perspective view showing a holding member according to the first embodiment.Figure 12 is an enlarged plan view showing a part of the holding member according to the first embodiment.Figure 13 is a perspective view showing a weight member according to the first embodiment.Figure 14 is a plan view showing a weight member according to the first embodiment.Figure 15 is a perspective view showing a weight member according to the first embodiment.Figure 16 is a bottom view showing a weight member according to the first embodiment.Figure 17 is a side view showing a weight member according to the first embodiment.Figure 18 is a plan view showing a part of the centrifugal clutch mechanism according to the first embodiment, and is a plan view showing the state in which the weight member is located radially outward.Figure 19 is an enlarged plan view showing the weight member positioned radially outward.Figure 20 is a cross-sectional view showing a part of the clutch device according to the first embodiment, and is a cross-sectional view showing the state in which the weight member is located radially inward.Figure 21 is a cross-sectional view showing a part of the clutch device according to the first embodiment, and is a cross-sectional view showing the state in which the weight member is located radially outward.Figure 22 is a cross-sectional view of the clutch device according to the second embodiment.Figure 23 is a perspective view showing a holding member according to the second embodiment.Figure 24 is a perspective view showing a weight member according to the second embodiment.Figure 25 is a bottom view showing the weight member according to the second embodiment.Figure 26 is a side view showing a weight member according to the second embodiment.Figure 27 is a cross-sectional view showing a part of the clutch device according to the second embodiment, and is a cross-sectional view showing the state in which the weight member is located radially inward.Figure 28 is a cross-sectional view showing a part of the clutch device according to the second embodiment, and is a cross-sectional view showing the state in which the weight member is located radially outward.Figure 29 is a plan view showing a part of the c