WO2007010686A1

WO2007010686A1 - Centrifugal clutch device

Info

Publication number: WO2007010686A1
Application number: PCT/JP2006/311785
Authority: WO
Inventors: Yoshio Imanishi; Hitoshi Terabayashi
Original assignee: Exedy Corporation
Priority date: 2005-07-20
Filing date: 2006-06-13
Publication date: 2007-01-25
Also published as: CN101223377A; CN101223377B; JP4054818B2; JP2007024254A

Abstract

A centrifugal clutch device mounted on a drive shaft into which a power from an engine is inputted and capable of transmitting and cutting off the power between the drive shaft and a transmission. The clutch device comprises a clutch boss (3), a clutch carrier (4), a centrifugal clutch part (5), and a clutch housing (6). The clutch boss (3) is connected to an input shaft (2). The clutch carrier (4) is fitted to the input shaft (2) in contact with the first side face of the clutch boss (3). The centrifugal clutch part (5) is disposed on the outer peripheral side of the clutch boss (3) and radially movably supported on the clutch carrier (4). The clutch housing (6) is fixed to a member (75) on the transmission side, the centrifugal clutch part (5) is disposed on the inner peripheral side of the clutch housing, and the power is transmitted from the clutch carrier (4) by the centrifugal clutch part (5). Then, the clutch boss (3) comprises a second lubricant feed passage (10) for feeding a lubricant to the centrifugal clutch part (5).

Description

Specification

, Formula tufted ¾_

Technical field

TECHNICAL FIELD [0001] The present invention relates to a centrifugal clutch device, and more particularly to a centrifugal clutch device that is provided on an input shaft to which power from an engine is input, and that cuts off transmission of power between the input shaft and a transmission. To do.

Background art

[0002] Centrifugal clutch devices are used for small motorcycles and the like, and include a clutch carrier, a centrifugal clutch portion disposed in the vicinity of the clutch carrier, and a clutch housing including the centrifugal clutch portion therein. Yes. When the rotational speed of the centrifugal clutch section increases, the centrifugal clutch section becomes clutch-on (power transmission state). In this state, power from the engine is transmitted to the clutch carrier and further transmitted to the clutch housing via the centrifugal clutch.

[0003] Further, in such a centrifugal clutch device, a lubricating oil supply mechanism is provided for supplying a lubricant to the friction material of the centrifugal clutch portion. (For example, see Patent Document 1).

Patent Document 1: JP-A-2005-69414

Disclosure of the invention

[0004] In the centrifugal clutch device disclosed in the publication, the lubricating oil supply mechanism has a lubricant supply path and a lubricant supply hole. Specifically, a lubricant supply path is provided inside the clutch cover, and the lubricant is supplied from this lubricant supply path to the centrifugal clutch portion through a lubricant supply hole provided in the clutch inner plate. .

However, in such a lubricant supply structure, since there is a space between the lubricant supply path and the lubricant supply hole of the clutch inner plate, one of the lubricants having the lubricant supply path force is used. The part cannot pass through the lubricant supply hole of the clutch inner plate, and the lubricant cannot be supplied efficiently to the friction material. For this reason, the friction material is easily worn.

[0006] An object of the present invention is to increase the supply efficiency of a lubricant to a friction material and to reduce wear of the friction material. [0007] A centrifugal clutch device according to claim 1 is a device that is provided on an input shaft to which power from an engine is input, and that interrupts transmission of power between the input shaft and the transmission. A clutch carrier, a centrifugal clutch portion, and a clutch housing. The clutch box is connected to the input shaft. The clutch carrier is provided in contact with the first side surface of the clutch boss, and is provided on the input shaft. The centrifugal clutch portion is disposed on the outer peripheral side of the clutch boss and is supported by the clutch carrier so as to be movable in the radial direction. The clutch housing is fixed to a member on the transmission side, and a centrifugal clutch portion is disposed on the inner peripheral side, and power is transmitted from the clutch carrier by the centrifugal clutch portion. The clutch boss has a supply path for supplying lubricant to the centrifugal clutch part.

In this centrifugal clutch device, when the rotational speed of the input shaft provided with the centrifugal clutch portion increases, the centrifugal clutch portion enters a clutch-on state (power transmission state). In this state, power from the engine is transmitted in the order of the input shaft, clutch carrier, centrifugal clutch, clutch housing, and transmission. At this time, the lubricant is directly supplied to the centrifugal clutch portion by rotation (centrifugal force) from a supply path provided in the clutch boss.

Here, the lubricant is directly supplied to the clutch portion from a lubricant supply path provided in the clutch boss portion. For this reason, the supply efficiency of the lubricant is improved, the lubricant can be stably supplied to the centrifugal clutch portion, and the wear of the friction material can be reduced.

[0009] A centrifugal clutch device according to claim 2 is the centrifugal clutch device according to claim 1, wherein the clutch housing has a discharge hole for discharging the lubricant.

[0010] Here, since the lubricant is also efficiently discharged from the discharge hole, it is possible to efficiently circulate the lubricant S.

[0011] The centrifugal clutch device according to claim 3 is the centrifugal clutch device according to claim 1, wherein the clutch portion is formed in an arc shape, one end is supported by the clutch carrier, and the other end is a fulcrum. And a clutch weight disposed on the outer periphery of the clutch weight and pressed against the inner peripheral surface of the clutch housing by the rotation of the clutch weight.

In this centrifugal clutch device, when power from the engine is transmitted and the clutch carrier rotates, centrifugal force is generated in the clutch weight, and the other end side of the clutch weight It moves to the outer peripheral side with one end supported by the carrier as a fulcrum. As a result, the clutch shoe disposed on the outer peripheral side of the clutch weight comes into contact with the inner peripheral side of the clutch housing. By this movement, the centrifugal clutch portion and the clutch housing are frictionally engaged, and power is transmitted from the clutch carrier to the clutch housing via the centrifugal clutch portion.

[0013] The centrifugal clutch device according to claim 4 is the centrifugal clutch device according to claim 1, wherein the centrifugal clutch portion provides a resistance force when the clutch weight rotates. have.

[0014] Here, since the clutch weight is subjected to the rotational resistance by the hysteresis generating mechanism, the shock when the clutch weight (clutch shoe) contacts the clutch housing is alleviated. For this reason, generation | occurrence | production and the impact of the noise at the time of clutch connection are suppressed.

Brief Description of Drawings

FIG. 1 is a cross-sectional view of an embodiment of the present invention.

FIG. 2 is a plan view of the centrifugal clutch device of the present invention.

Explanation of symbols

[0016] 1 Centrifugal clutch device

3 Clutch hub

4 Clutch carrier

5 Centrifugal clutch

6 Clutch housing

7 Hysteresis generation mechanism

10 Supply path

20 Support member

30 Clutch weight

31 Clutch show

35 Coil spring

BEST MODE FOR CARRYING OUT THE INVENTION

[0017] [Configuration]

FIG. 1 shows a cross-sectional view of a centrifugal clutch device 1 according to an embodiment of the present invention. This implementation The centrifugal clutch device 1 according to the embodiment is provided on an input shaft 2 connected to an engine, and performs power transmission and interruption between the input shaft 2 and a transmission-side member 75. The centrifugal clutch device 1 includes a clutch boss 3, a clutch carrier 4, a centrifugal clutch unit 5, a clutch housing 6, a first hysteresis generating mechanism 7, and a second hysteresis generating mechanism 70. Here, the following description will be made with the right side of FIG. 1 as the axially outer side and the left side of FIG. 1 as the axially inner side.

The clutch boss 3 is an annular member, and a spline 11 is formed on the inner peripheral surface.

The spline 11 is engaged with a spline formed on the outer periphery of the input shaft 2. Further, a second lubricant supply passage 10 is formed on one side of the clutch boss 3, that is, on the clutch carrier 4 side, penetrating from the inner peripheral side to the outer peripheral side. The second lubricant supply path 10 is a path for supplying the lubricant in the first lubricant supply path 9 provided inside the input shaft 2 to the centrifugal clutch section 5, and is provided from the input shaft 2 side to the centrifugal clutch. It is a groove formed on a straight line between the parts 5 side by forging or machining.

The clutch carrier 4 is a plate-like member, and is arranged such that the inner peripheral portion is in contact with the axially outer end surface of the clutch boss 3. The clutch carrier 4 includes a first disc portion 14 that contacts the end surface of the clutch boss 3, a cylindrical portion 13 formed on the outer peripheral side of the first disc portion 14, and a first disc on the outer peripheral side of the cylindrical portion 13. And a second disc portion 15 disposed on the outer side in the axial direction than the disc portion 14. The first disc portion 14 has a spline formed on the inner peripheral side, and this spline is engaged with the input shaft 2.

As shown in FIG. 2, the centrifugal clutch portion 5 is a portion arranged on the outer peripheral side of the clutch boss 3, and includes three clutch weights 30 formed in an arcuate shape, and outer peripheries of the clutch weights 30. A clutch shoe 31 fixed to the side, a support member 20 that supports one end of each clutch weight 30, and a coil spring 35 that connects the two clutch weights 30 that contact P

The clutch weight 30 is supported by the clutch carrier 4 via a support member 20 at one end in the circumferential direction. Then, when the clutch weight 30 rotates around the support member 20, the other end moves to the outer peripheral side and contacts the inner peripheral side wall surface of the clutch housing 6.

The clutch shoe 31 is formed by the clutch weight 30 rotating around the support member 20. Then, it is pressed toward the inner peripheral side of the clutch housing 6. A plurality of circumferentially extending second grooves 34 are formed on the outer peripheral side of the clutch shoe 31.

Each of the three support members 20 is disposed on the outer peripheral side of the clutch carrier 4 and includes a caulking portion 21, a plate portion 22, and a column portion 23. The crimping portion 21 is a portion formed by plastically deforming the axially outer end portion of the support member 20, and the support member 20 is fixed to the clutch carrier 4 by the caulking portion 21. The plate portion 22 is a disk-like member having a thickness greater than that of the force-applying portion 21 and is disposed in contact with the side surface on the inner side in the axial direction of the second disc portion 15. The column portion 23 is a portion that supports one end of the clutch weight 30 and is a cylindrical member.

The coil spring 35 is a member that connects two adjacent clutch weights 30 and is provided to bias the clutch weight 30 toward the inner peripheral side. One end of the coil spring 35 is locked to one base end side (the side supported by the support member 20) of the two clutch weights 30 in contact with P, and the other end is the other of the two clutch weights 30. It is locked to the front end side. With such a configuration, when centrifugal force is not applied to the clutch weight 30, the front end side of the clutch weight 30 is biased toward the inner peripheral side by the coil spring 35, and the clutch bush 31 is separated from the clutch housing. Les.

[0025] The clutch housing 6 is a member that is fixed to the transmission-side member 75 and that the centrifugal clutch portion 5 is pressed against the inner peripheral surface. The clutch housing 6 has a disc-like portion 40 and a tubular portion 41. A transmission-side member 75 is fixed to the inner peripheral portion of the disc-like portion 40. The cylindrical portion 41 is formed so as to extend from the outer peripheral side of the disc-like portion 40 to the axially outer side to the position of the clutch carrier 4. The centrifugal clutch portion 5 is disposed on the inner peripheral side of the cylindrical portion 41. In addition, four holes 42 are formed at equiangular intervals in the circumferential direction at the boundary between the disc-like portion 40 and the tubular portion 41. The hole 42 is for releasing the lubricant supplied from the second lubricant supply passage 10 to the centrifugal clutch portion to the outside of the clutch housing 6.

The first hysteresis generating mechanism 7 is a mechanism for applying a sliding resistance to the clutch weight 30 when the clutch weight 30 rotates, and is disposed in the clutch housing 6. The first hysteresis generating mechanism 7 includes three protrusions 50 arranged on the clutch carrier 4, an elastic member 51 mounted on each protrusion 50, and a first groove 33 provided on the clutch weight 30. Have The three protruding portions 50 protrude inward in the axial direction at the second disc portion 15 of the clutch carrier 4 and are provided at intervals of 120 degrees. The elastic member 51 is formed in an annular shape and is attached to the protrusion 50. The elastic member 51 is fitted in a first groove 33 provided in the clutch weight 30 (see FIG. 2). The first groove 33 is formed on the axially outer side surface of the clutch weight 30 so as to open to the inner peripheral side. Since the width of the first groove 33 is shorter than the diameter of the elastic member 51, the elastic member 51 is inserted into the first groove 33 in an elastically deformed state.

[0027] The second hysteresis generating mechanism 70 includes a friction material 24 mounted on the outer side in the axial direction of the clutch weight 30, a wave spring 25 disposed on the inner side in the axial direction of the clutch weight 30, and a coil spring 25. And a stopper plate 60 disposed on the inner side in the axial direction. The friction member 24 is an annular member disposed between the clutch weight 30 and the plate portion 22 of the support member 20 and is a member for generating hysteresis. The wave spring 25 is a member obtained by deforming an annular plate member into a wave shape, and is a member that biases the clutch weight 30 toward the friction material 24 side. The wave spring 25 is elastically deformed into a flat plate shape and is attached to the inside of the clutch weight 30 in the axial direction. The stopper plate 60 is an annular plate member having a plurality of protrusions on the inner periphery, and the protrusions engage with the grooves 65 of the support member 20 to elastically deform the wave spring 25.

[0028] [Operation]

Power from the engine is transmitted in the order of the clutch carrier 4, the support member 20, and the centrifugal clutch portion 5. When power is transmitted to the centrifugal clutch section 5 in this way, the clutch weight 30 rotates with the clutch carrier 4, and centrifugal force acts on the clutch weight 30 so that the clutch weight 30 tends to move to the outer peripheral side. At this time, since one end of the clutch weight 30 is supported by the support member 20, the other end rotates around the support member 20. By this rotation, the clutch shoe 31 of the centrifugal clutch portion 5 is frictionally engaged with the inner peripheral portion of the clutch housing 6, and the power transmitted to the centrifugal clutch portion 5 is transmitted to the clutch housing 6. Further, the power transmitted to the clutch housing 6 is transmitted to a member 75 on the transmission side.

[0029] Here, when the clutch weight 30 rotates around the support member 20, the support member 20 Hysteresis occurs between the friction material 24 attached to the clutch and the clutch weight 30. In addition, since the first groove 33 provided in the clutch weight 30 and the elastic member 51 move relative to each other, hysteresis occurs between them. As described above, since hysteresis occurs, the clutch is smoothly connected, and abnormal noise and impact when the clutch is suddenly connected are generated when the clutch is connected.

On the other hand, when the rotational speed of the centrifugal clutch portion 5 is reduced, the urging force of the coil spring 35 is greater than the centrifugal force acting on the clutch weight 30. In this case, the frictional engagement between the clutch housing 6 and the centrifugal clutch part 5 is released, and the power of the centrifugal clutch part 5 is not transmitted to the clutch housing 6 but is cut off.

In such an operation, the lubricant supplied through the first lubricant supply path 9 of the input shaft 2 passes through the second lubricant supply path 10 of the clutch boss 3 and is centrifuged in the clutch housing 6. Directly supplied to the clutch unit 5. Then, the lubricant supplied to the centrifugal clutch portion 5 is discharged to the outside through the four holes 42 provided in the clutch housing 6 or between the clutch carrier 4 and the clutch housing 6. Since the lubricant is directly supplied to the centrifugal clutch portion 5 in this way, the lubricant is stably supplied to the centrifugal clutch portion 5 and the wear of the clutch shoe 31 can be reduced.

[0032] [Other Embodiments]

In the embodiment of the present invention, the clutch weight 30 having one member is used, but the present invention can be implemented even if a plurality of plate-like member forces are configured.

Industrial applicability

In the present invention, wear of the friction material of the centrifugal clutch can be reduced.

Claims

The scope of the claims

[1] A centrifugal clutch device that is provided on an input shaft to which power of engine power is input, and that transmits and interrupts power between the input shaft and a transmission,

A clutch boss coupled to the input shaft from the engine;

A clutch carrier provided in contact with the first side surface of the clutch boss and coupled to the input shaft;

A centrifugal clutch portion disposed on an outer peripheral side of the clutch boss and supported by the clutch carrier so as to be movable in a radial direction;

A clutch housing fixed to the transmission-side member and having the centrifugal clutch portion disposed on an inner peripheral side, wherein power is transmitted from the clutch carrier by the centrifugal clutch portion;

The clutch boss has a supply path for supplying a lubricant to the centrifugal clutch portion.

Centrifugal clutch device.

[2] The distal clutch device according to claim 1, wherein the clutch housing has a discharge hole for discharging the lubricant.

[3] The centrifugal clutch part is:

A clutch weight formed in an arc shape, one end supported by the clutch carrier and the other end pivotable about the one end;

A clutch shoe disposed on the outer periphery of the clutch weight and pressed against the inner peripheral surface of the clutch housing by the rotation of the clutch weight;

The centrifugal clutch device according to claim 1, comprising:

4. The centrifugal clutch according to claim 1, wherein the centrifugal clutch portion has a hysteresis generating mechanism that applies a resistance force when the clutch weight rotates.