KR100489776B1 - Wet type centrifugal clutch - Google Patents

Abstract

In a wet centrifugal clutch, an oil supply passage for supplying lubricating oil is formed in the insertion hole of the weight into which the support shaft is inserted, without increasing the number of parts, reducing wear at the contact portion between the support shaft and the weight, The wet centrifugal clutch is a support shaft 3 formed in the drive plate 2 that is integrally rotated with the crank shaft, and an insertion hole into which the support shaft 3 is inserted. And a weight (4) having a support (40) and freely supported on the support shaft (3). The weight 4 is composed of laminated plate materials 41 and 42, and the grooved plate material 42 is formed with a groove 43 reaching the insertion hole 40 in the side surface 42b in the stacking direction, The oil supply passage 44 for supplying the lubricating oil pressurized by the centrifugal force to the insertion hole 40 by the through hole formed by the plate member 41 covering the groove 43 and the groove 43 in the stacking direction is provided. Is formed.

Description

Wet Centrifugal Clutch {WET TYPE CENTRIFUGAL CLUTCH}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet centrifugal clutch, for example, which is used in a power transmission device of a vehicle and in which torque transmission and interruption of a rotating drive member are performed by a weight swinging in response to a centrifugal force.

Background Art Conventionally, there is one disclosed in Japanese Patent Application Laid-Open No. 63-27586 as this type of centrifugal clutch. This wet centrifugal clutch is provided with the shaft (corresponding to the support shaft) formed in the plate member fixed to the drive shaft, and the inner (corresponding to the weight) having the insertion hole into which the shaft is slidably inserted. The inner is freely swinged about the shaft and oscillates in the radial direction by the centrifugal force generated by the rotation of the drive shaft. Then, the inner shaft swinging outward in the radial direction by the centrifugal force generated by the increase in the rotational speed of the drive shaft frictionally engages the outer arranged outside, whereby the torque of the drive shaft is integrally coupled to the clutch outer and further to the clutch outer. It is delivered to the output shaft. Moreover, an inner is comprised by the several board | plate material laminated | stacked.

By the way, in the prior art, the insertion hole of the inner reaches the insertion hole with the lubricating oil penetrating into the gap between the shaft and the inner or the gap between the laminated sheet, and these gaps are very small and the flow resistance of the lubricating oil is large. The flow rate penetrating into these gaps and supplied to the insertion hole is very small. In particular, since the intermediate portion in the axial direction of the insertion hole is located away from the outer surface where the shaft is exposed, the flow resistance is further increased, and the flow rate supplied to the intermediate portion is further reduced. As a result, the contact portion between the shaft and the inner, which is a relatively sliding portion, is worn, so that the gap between the two is increased, and the sound of collision due to the collision between the shaft and the inner may be generated.

The present invention has been made in view of the above circumstances, and the invention described in claims 1 to 5 provides a lubricating oil supply path for supplying lubricating oil to an insertion hole of a weight into which a support shaft is inserted, without increasing the number of parts in a wet centrifugal clutch. The purpose of the present invention is to reduce wear at the contact portion between the support shaft and the weight, and to prevent or suppress the occurrence of bumping sound caused by the collision between the two. In addition, the invention of claim 2 aims to supply pressurized lubricating oil to the insertion hole without increasing the number of parts, and the invention of claim 3 further relates to reducing wear at the contact portion between the support shaft and the weight. An object of the present invention is to provide an oil supply passage easily, and to facilitate adjustment of the supply amount and supply position of the lubricant to the insertion hole. The present invention also aims to reduce the wear on the contact surface by supplying a required amount of lubricant to the contact surface between the input side rotating member and the weight.

The invention of claim 1 further comprises: an input side rotating member which rotates integrally with a drive member, a support shaft formed on the input side rotating member, a weight having a slide and freely supported on the support shaft with an insertion hole into which the support shaft is inserted; And the insertion of the wet centrifugal clutch having an output side rotating member, wherein the torque transmission and interruption of the drive member to the output side rotating member are performed by the weight swinging about the support shaft according to the centrifugal force generated. An oil supply passage for supplying lubricating oil to the holes is a wet centrifugal clutch formed by using the constituent members of the centrifugal clutch.

As a result, it is possible to supply the required amount of lubricating oil from the viewpoint of reducing wear at the contact portion between the support shaft and the weight to the insertion hole through the oil supply passage, thereby reducing wear at the contact portion between the support shaft and the weight. In addition, since the oil passage is formed using the constituent members of the centrifugal clutch, it is unnecessary to add a new member for forming the oil passage.

According to a second aspect of the invention, in the wet centrifugal clutch according to the first aspect, the lubricating oil in the oil supply passage is pressurized by the centrifugal force generated by the rotation of the input side rotating member and supplied to the insertion hole.

Thereby, since the lubricating oil of the oil supply passage is supplied to the insertion hole by using the centrifugal force generated by the rotation of the input side rotating member, a pressurizing device for pressurizing the lubricating oil is unnecessary.

The invention of claim 3 is the wet centrifugal clutch according to claim 1 or 2, wherein the structural member is the weight, and the outlet of the oil supply passage is opened in the middle of the insertion hole in the swing center line direction.

Accordingly, the lubricating oil is supplied through the oil supply passage in the middle portion of the insertion hole, which has conventionally been difficult to supply the required amount of lubricating oil in terms of wear reduction.

According to a fourth aspect of the present invention, in the wet centrifugal clutch of the third aspect, the weight includes a plurality of laminated sheets, and at least one of the plurality of sheets reaches the insertion hole on the side in the stacking direction. A grooved plate is formed with a groove, and the oil supply passage is formed of a through hole formed by the groove and the plate covering the groove in the stacking direction.

As a result, since the fuel path is formed by stacking the grooved plate and the plate, it is easy to form the fuel path, and by changing the stacking position of the grooved plate, or by changing the number of grooved plates, The supply position or supply amount of the lubricating oil to the insertion hole can be easily adjusted.

The invention of claim 5 is the wet centrifugal clutch according to claim 2, wherein the constituent members are the input side rotating member and the weight having contact surfaces which are in contact with each other, and the oil passage is at least one of the input side rotating member and the weight. And a groove formed in the contact surface and reaching the insertion hole, and a through hole formed by at least the other side of the input side rotating member and the weight covering the groove in the rotational axis direction of the drive member.

Accordingly, in addition to supplying the lubricating oil pressurized by the centrifugal force at the end of the insertion hole through the oil supply passage, the required amount of lubricant oil is also supplied to the contact surface between the input side rotating member and the weight through the oil supply passage from the viewpoint of reducing both wear, and the input side. Wear at the contact portions of the rotating member and the weight is reduced.

In addition, in this specification, a "diameter direction" means the radial direction centering on the rotation axis of a drive member, and an "axis direction" means the direction of the rotation axis of a drive member.

Embodiment of the Invention

1 to 5, an embodiment in which the wet centrifugal clutch according to the present invention is used as an oscillation clutch that constitutes a power transmission device for a motorcycle equipped with an internal combustion engine will be described.

1 to 3 illustrate the first embodiment of the present invention. 1 and 2, the wet centrifugal clutch C attached to the crankshaft 1 as a drive member of the internal combustion engine is fluidly connected to the mission case and the mission case in which a transmission (not shown) is accommodated. It is stored in the clutch chamber formed by the cover to be engaged, and at least a part thereof is immersed in the lubricating oil of the clutch chamber.

The centrifugal clutch C includes a drive plate 2 as an input side rotating member which rotates integrally with the crankshaft 1, and a plurality of, for example, three support shafts 3 fixedly installed to the drive plate 2; And a weight 4 which has an insertion hole 40 into which the support shaft 3 is inserted, which slides freely and swings freely on the support shaft 3 and forces the weight 4 toward the radially inner side. As an output side rotating member which is located outside of the drive plate 2 so as to cover the drive plate 2 and the respective weights 4 in the radially outer side, and is rotatably supported by the crankshaft 1. A clutch outer 6 is provided. Therefore, the drive plate 2, the support shaft 3 and the weight 4 are part of the constituent members of the centrifugal clutch C. As shown in FIG.

Here, each support shaft 3 is fixed to the drive plate 2 so as to be substantially parallel to the rotation axis L1 of the crankshaft 1. The weight 4 also has a lining 7 made of a friction material bonded to its outer circumferential surface. Further, the bowl-shaped clutch outer 6 is fixed to the primary deceleration drive gear 9 as a driven member that is rotatably supported by the crankshaft 1 via the needle bearing 8, and the primary deceleration drive gear 9 Rotate integrally with).

The centrifugal clutch C is cut off when the engine rotational speed is equal to or less than the predetermined rotational speed, and is in a connected state when the engine rotational speed exceeds the predetermined rotational speed. Specifically, the centrifugal force generated in the weight 4 is small at the engine rotational speed equal to or less than the predetermined rotational speed, and the weight 4 is driven by the spring force of the spring 5 so that the stopper portion 4s is the drive plate 2. It is in the initial position which contacted the cylindrical part 2n of (). For this reason, the centrifugal clutch C will be in the cutoff state which does not transmit the torque of the crankshaft 1 to the clutch outer 6. When the engine rotation speed exceeds the predetermined rotation, the centrifugal force generated in each weight 4 increases, and the centrifugal force resists the weight 4 against the spring force of the spring 5 to the center of the support shaft 3. It swings radially outward and presses the weight 4 to the inner peripheral surface of the clutch outer 6 via the lining 7. For this reason, the centrifugal clutch C becomes a connection state which transmits the torque of the crankshaft 1 to the clutch outer 6 by the frictional force between the lining 7 and the clutch outer 6, and is further engine. As the rotation speed increases, the drive plate 2 and the clutch outer 6 are in a fully connected state in which they rotate integrally.

As described above, in the centrifugal clutch C, the torque transmission and blocking of the crankshaft 1 are driven by the weight 4 swinging about the support shaft 3 in accordance with the centrifugal force generated in the weight 4. It is done automatically according to the number. The torque of the crankshaft 1 is transmitted to the primary deceleration drive gear 9 after the centrifugal clutch C is in a connected state, and is further engaged with the primary deceleration drive gear 9. From the gears, it is transmitted to the drive wheels (not shown in any) via the transmission clutch, the transmission and the secondary deceleration mechanism.

Referring to FIG. 3 together, each weight 4 includes a plurality of laminated sheets 41 and 42, for example, five sheets 41 and 42 by means of fixing (not shown) such as welding or riveting. It is integrated. The five boards 41 and 42 are two sheets each having three basic plate members 41 having no grooves 43 to be described later and grooves 43 formed by processing the basic plate members 41. It consists of a grooved plate (42). The groove 43 reaches the insertion hole 40 at the inner circumferential surface 42a of the inner side (the side of the rotation axis L1 of the crankshaft 1) in the radial direction of the grooved plate member 42, and at the same time the cross section is V. It is a set of groove | channels which are shaped like a child, and are formed in the side surface 42b on the opposite side to the drive plate 2 in the lamination direction (consistent with the axial direction A in this embodiment).

Moreover, in the fluctuation range of the weight 4, the groove 43 is located in the area | region of the weight 4 of the inner side rather than the insertion hole 40 in radial direction, and extends linearly in the substantially radial direction. And, preferably, when the centrifugal clutch C is in the fully connected state and the weight 4 is in the maximum swing position, the groove 43 extends coincident with the radial direction, that is, the diameter at the inner circumferential surface 42a. The inner opening 43a opening in the direction and the outer opening 43b opening in the radial direction in the insertion hole 40 are formed so as to be located in a straight line in the radial direction.

In the state in which all the plates 41 and 42 are laminated | stacked, the groove | channel 43 faces the side surface 42b in which the groove | channel 43 was formed adjacent to the grooved plate 42 in the axial direction A, and ) Is covered from the lamination direction. In this manner, through the cavity of the grooved plate 42 and the grooved plate 41, the weight 4 is formed with a through hole reaching the insertion hole 40 from the inner circumferential surface 4a of the weight. The oil supply passage 44 in which the inlet 44a constituted by the inner opening 43a is opened in the inner circumferential surface 42a, and the outlet 44b constituted by the outer opening 43b is opened in the insertion hole 40. ) Is configured.

Each oil supply path 44 is located inward of the insertion hole 40 in the radial direction in the overall swinging range of the weight 4 defined by the initial position and the maximum swinging position, and is almost linear in the radial direction. Since the lubricating oil flowing from the inlet 44a and present in the oil supply passage 44 when the drive plate 2 is rotating, the outlet 44b is caused by the centrifugal force generated by the rotation of the drive plate 2. Flow toward. And the lubricating oil pressurized by the centrifugal force is supplied to the insertion hole 40, and it is supplied to the contact part of the support shaft 3 and the weight 4 which are relatively rocking.

In addition, each oil supply path 44 corresponds to the direction along the oscillation center line L2 which is also the center axis line of the support shaft 3 (in this embodiment, coincides with the axial direction A, and it is hereafter called "sway center line direction"). In the middle of the insertion hole 40, i.e., the portions excluding the openings 40a and 40b at both ends of the insertion hole 40 in the swinging centerline direction. For this reason, among the contact parts of the support shaft 3 and the weight 4, the support shaft 3 and the weight 4 which were mutually joined were separated from the exposed outer surface, and the support shaft 3 and the insertion hole 40 are separated. Because of its large flow resistance, the required amount of lubricant is supplied from the viewpoint of reduction of wear through the oil supply passage 44 in the middle portion in the direction of the swinging center line, which is a portion where the lubricant is hardly supplied from the minute gap therebetween.

And, in the middle part of the insertion hole 40 (thus, it is also the middle part of the contact part of the support shaft 3 and the weight 4), in the micro clearance gap between the support shaft 3 and the insertion hole 40, In order to supply the lubricating oil near the center portion 40c of the insertion hole 40, which is a very difficult part to supply the lubricating oil, in the present embodiment, five plates 41 and 42 are provided at the end of the weight 4 in the stacking direction. The base plate 41 is disposed, and as a whole, the base plate 41 and the grooved plate 42 are alternately stacked to form a weight 4, thereby forming a center portion of the insertion hole 40 in the swing centerline direction. The oil supply passage 44 is disposed on both sides of the 40c.

Moreover, the groove | channel 43 is formed by press work with respect to the base board material 41 formed by press work simultaneously with the process of the base board material 41, or following the process.

Next, the operation and effect of the first embodiment configured as described above will be described.

When the internal combustion engine is operated, the drive plate 2 of the centrifugal clutch C rotates integrally with the crankshaft 1, and when the engine rotational speed exceeds the predetermined rotational speed, the centrifugal clutch C is connected to the motor vehicle. Torque of the crankshaft 1 is transmitted to a drive wheel.

At this time, the weight 4 of the centrifugal clutch C rotates together with the drive plate 2 and lubricates the insertion hole 40 into which the support shaft 3 for supporting the weight 4 freely swings is inserted. Since the oil supply passage 44 to supply is formed in the weight 4, the required amount of lubricating oil is inserted through the oil supply passage 44 from the viewpoint of reducing wear at the contact portion between the support shaft 3 and the weight 4. ), And wear in the insertion hole 40 of the support shaft 3 and the weight 4, which are relatively sliding portions, can be reduced, so that the increase in the gap between the two due to wear is prevented or suppressed. This prevents or suppresses the generation of noise based on the impact sound generated by the collision of the two. In addition, the oil supply passage 44 is formed using the weight 4 which is a constituent member of the centrifugal clutch C, so that the number of parts does not increase to form the oil supply passage 44.

Since the lubricating oil of the oil supply passage 44 is pressurized by the centrifugal force generated by the rotation of the drive plate 2 and supplied to the insertion hole 40, the lubricating oil is pressurized by the centrifugal force generated by the rotation of the drive plate 2. The pressurizing device for pressurizing the lubricating oil becomes unnecessary, and the structure of the centrifugal clutch C is not complicated. In addition, the pressurized lubricating oil can reliably supply the required amount of lubricating oil to the insertion hole 40.

In addition, the oil supply passage 44 is formed so as to extend in a direction coinciding with the radial direction when the weight 4 is at the maximum swing position in the driving station in which the engine rotation speed exceeds the predetermined rotation speed. Since the direction of and the direction of the centrifugal force can be matched, the large centrifugal force generated in the rotational area can be utilized to maximize the degree of pressurization of the lubricating oil, the lubricating oil flows smoothly, and the flow rate to the insertion hole 40 is increased. You can do a lot.

The outlet 44b of the oil supply passage 44 formed in the weight 4 is opened near the middle portion of the insertion hole 40 in the swinging centerline direction of the weight 4 or near the center portion 40c of the insertion hole 40. Thus, the lubricant of the required amount is supplied from the viewpoint of the reduction of wear through the oil supply passage 44 near the middle portion of the insertion hole 40, particularly the center portion 40c, which has conventionally been difficult to supply the required amount of lubricant in terms of wear reduction. Since it is supplied, wear of the insertion hole 40 is reduced effectively.

The weight 4 is composed of a plurality of laminated sheets 41 and 42, and at least one of the plurality of sheets 41 and 42 is inserted into the insertion hole 40 at the side surface 42b in the stacking direction. A grooved plate member 42 having a groove 43 reaching therein, and an oil supply passage 44 is formed through the base plate 41 covering the groove 43 and the groove 43 in the stacking direction. Since the oil supply passage 44 is formed by stacking the base plate 41 and the grooved plate member 42 by being formed by the hole, the formation of the oil supply passage 44 becomes easy. In addition, by changing the stacking position of the grooved plate member 42, the supply position of the lubricating oil to the insertion hole 40 can be easily adjusted, and the insertion of the grooved plate member 42 by changing the number of sheets is performed. Since the supply amount of the lubricating oil to the hole 40 can be adjusted easily, wear of the contact part of the support shaft 3 and the weight 4 can be reduced optimally. Moreover, since the groove | channel 43 is formed in the side surface 42b of the grooved board | plate material 42 by press working, a groove | channel can be formed easily.

Moreover, since the oil supply path 44 is comprised by the through hole, lubricating oil can be reliably supplied to the through hole 40 without lubricating oil scattering by centrifugal force in the middle of the oil supply path 44.

Next, referring to Figs. 4 and 5, a second embodiment of the present invention will be described. This second embodiment differs from the first embodiment in that the grooves are formed in the drive plate 2, not in the plate material constituting the weight 4, and otherwise have basically the same configuration. For this reason, description of the same part is abbreviate | omitted or abbreviate | omitted and demonstrated centering on a different point. In addition, the same code | symbol was used about the member same as the member of 1st Example, or a corresponding member.

The drive plate 2 and the base plate 4 _{1 1} of the weight 4 adjacent to the drive plate 2 in the axial direction A in the state where the weight 4 is bonded to the drive plate 2 are in the axial direction. side to side contact with each other in (a), i.e. having a contact surface (2a, 41 ₁ a). Then, the contact surface 2a of the drive plate 2 reaches the through-hole 40 at a portion near the crankshaft 1 in the radial direction for each of the support shafts 3 and has one groove 21 having a rectangular cross section. Is formed. Each groove 21 is located in the region inward of the insertion hole 40 in the radial direction and extends in a direction coinciding with the radial direction, that is, an inner opening located in the radially inward direction of the insertion hole 40. 21a and the outer side opening 21b which open to the edge part of the insertion hole 40 are formed so that it may be located in a straight line in radial direction.

The groove 21 is covered in the axial direction A by the base plate 4 _{1 1} of the weight 4 in a state where the weight 4 is bonded to the drive plate 2. In this way, a through hole is formed in the cavity of the drive plate 2 and the weight 4 that reaches the end of the insertion hole 40 from a position inward of the insertion hole 40 in the radial direction, and is formed in the through hole. As a result, the inlet 22a constituted by the inner opening 21a is opened at a position in the radially inner side than the insertion hole 40, and the outlet 22b constituted by the outer opening 21b is the insertion hole 40. The oil supply passage 22 which is opened in the end opening 40b of () is comprised.

Since each oil passage 22 extends linearly in the radial direction, when the drive plate 2 is rotating, the lubricating oil flowing from the inlet 22a and present in the oil passage 22 is discharged by centrifugal force. 22b). Then, the lubricating oil pressurized by the centrifugal force is supplied to the contact portion of the support shaft 3 and the weight 4 that slides relatively at the end of the insertion hole 40, and the drive plate 2 and the weight ( 4) is supplied to the contact surface (2a, 41 ₁ a).

According to this second embodiment, the following actions and effects are exerted except that the same actions and effects as those of the first embodiment are exerted except for the operation and effects associated with the formation of the oil feed passage 22 in the weight 4. Exerted. That is, the oil supply passage 22 is formed by the groove 21 formed in the drive plate 2 and reaching the insertion hole 40 and the weight 4 covering the groove 21 in the axial direction A. FIG. The base plate of the drive plate 2 and the weight 4, except that the lubricating oil pressurized by the centrifugal force is supplied from the end opening 40b of the through hole 40 through the oil supply passage 22 to be provided. (41 ₁₎ is supplied with the lubricating oil of the requirements in terms of wear reduction of the two through the contact surface (2a, 41 ₁ a) to 22 to the fuel supply of, reducing the wear of the contact surface of the two (2a, 41 ₁ a) Since it can do this, the durability of the centrifugal clutch C can be improved.

Hereinafter, the changed structure is demonstrated about the Example which changed the structure of one part of embodiment mentioned above.

In the first embodiment, the number of grooved plate members 42 is two, and at least one plate member constituting the weight 4 may be the grooved plate member 42. The number of board | plate materials 41 and 42 which comprise the weight 4 should just be many except five. In addition, the lamination | stacking position of the grooved board | plate material 42 does not need to be a position laminated | stacked alternately with the base board | plate material 41, For example, the grooved board | plate material 42 may be laminated | stacked adjacently, and also the weight 4 The board | plate material 42 with a groove | channel may be sufficient as all the board materials which comprise).

The weight 4 may not be laminated | stacked, but may consist of a single block, In that case, processing means, such as a machining process, so that the through hole which comprises the oil supply path reaches the through hole 40 from the inner peripheral surface of the weight. Is formed by.

The groove 44 was formed in the grooved attachment plate 42 on the side surface 42b on the side opposite to the drive plate 2 in the axial direction A, but the side surface 42c on the drive plate 2 side ( 1 and 2), and may be formed on both side surfaces 42b and 42c. As long as the lubricating oil is supplied by centrifugal force, the formation direction of the groove | channel 44 and 22 may shift | deviate in the direction corresponded to a radial direction. In addition, a plurality of grooves 43 and 21 may be formed in the grooved plate 42 and the drive plate 2, and a plurality of oil passages 44 and 22 may be formed by these grooves.

In the second embodiment, the groove 21 is formed in the contact surface 2a of the drive plate 2, but not the contact surface 2a but the contact surface 4 ₁ a of the weight 4 in contact with the contact surface 2a. ) and a groove may be formed on, and also grooves are formed on both sides of the contact surface (2a) and the contact surface (41 ₁ a), or may be a formed as a fuel supply to the cavity of the two grooves. Similarly, also in the first embodiment, grooves may be formed on both side surfaces of the two plate members adjacent to each other in the lamination direction, respectively, and one oil passage may be formed by the cavity of both grooves.

In addition, in combination with the first and second embodiments, an oil supply passage 44 is formed between the plate materials 41 and 42 of the weight 4 and at the same time between the drive plate 2 and the weight 4. An oil supply passage 22 may also be formed.

The centrifugal clutch has been used as an oscillation clutch of the power transmission device of a motorcycle in each of the above embodiments, and can be used for vehicles other than the motorcycle, and can also be used for power transmission devices for devices other than the vehicle.

According to invention of Claim 1, the following effects are exhibited. That is, the oil supply passage for supplying the lubricating oil to the insertion hole into which the support shaft for freely supporting the weight is inserted is formed by using the structural member of the wet centrifugal clutch, thereby supplying the required amount of lubricating oil to the insertion hole through the oil supply passage, Since wear at the support shaft and the insertion hole of the weight can be reduced, an increase in the gap between the two due to abrasion is prevented or suppressed, and generation of noise based on the impact sound generated by the collision between the two is prevented or suppressed. do. In addition, since the oil passage is formed using the constituent members of the centrifugal clutch, the number of parts does not increase to form the oil passage.

According to invention of Claim 2, the following effects are exhibited in addition to the effect of invention of Claim 1. That is, since the lubricating oil of the oil supply passage is pressurized by the centrifugal force generated by the rotation of the input side rotating member and supplied to the insertion hole, the lubricating oil is pressurized by the centrifugal force generated by the rotation of the input side rotating member, which makes the pressurization device unnecessary. Therefore, the structure of the centrifugal clutch is not complicated. Therefore, the pressurized lubricant can reliably supply the required amount of lubricant to the insertion hole.

According to invention of Claim 3, the following effects are exhibited in addition to the effect of invention of the Claim description cited. That is, the constituent member is a weight, and the outlet of the oil passage is opened in the middle of the insertion hole in the swing centerline direction of the weight, so that the required amount of lubricant is supplied from the viewpoint of wear reduction through the oil passage in the middle of the insertion hole. , Wear of the insertion hole is effectively reduced.

According to invention of Claim 4, the following effects are exhibited in addition to the effect of invention of Claim 3. That is, the weight is composed of a plurality of laminated plate material, at least one of the plurality of plate material is a plate material having a groove formed with a groove reaching the insertion hole on the side in the lamination direction, the oil passage is the groove and the By forming the through hole formed by the plate | board material which covers a groove | channel in a lamination direction, formation of an oil supply path becomes easy. In addition, by changing the lamination position or the number of sheets of the grooved plate, the supply position or the supply amount of the lubricating oil to the insertion hole can be easily adjusted, so that wear of the contact portion between the support shaft and the weight can be optimally reduced. .

According to invention of Claim 5, the following effects are exhibited in addition to the effect of invention of Claim 2. That is, the constituent members are an input side rotating member and a weight having contact surfaces in contact with each other, the oil supply passage is formed on at least one of the input side rotating member and the weight to reach the insertion hole, and the input side rotating member covering the groove in the axial direction. And a through hole formed by at least the other side of the weight, so that the required amount of lubricant can also be supplied to the contact surface of the input side rotating member and the weight through the oil supply passage, and the abrasion at both contact surfaces can be reduced. Can improve.

1 is a cross-sectional view taken along the line I-I of FIG. 2 of a wet centrifugal clutch according to the present invention, which shows a first embodiment of the present invention and is applied to an oscillating clutch of a power transmission device for a motorcycle;

2 is a cross-sectional view taken along the line II-II of FIG. 1;

3 is a partially exploded perspective view of the centrifugal clutch of FIG. 1, FIG.

4 shows a second embodiment of the present invention, an exploded perspective view corresponding to FIG. 3 of the first embodiment,

FIG. 5 is a cross-sectional view of an essential part of the drawing corresponding to FIG. 1 of the first embodiment of the second embodiment of the present invention. FIG.

<Explanation of symbols for the main parts of the drawings>

1: crankshaft 2: drive plate

2a: contact surface 3: support shaft

4: weight 5: spring

6: clutch outer 7: lining

8: needle bearing 9: primary deceleration drive gear

21: Home 22: Supply Path

40: insertion hole 41: basic plate

41 ₁ a: Contact surface 42: Grooved plate

43: home 44: oil supply passage

44b: exit C: centrifugal clutch

L1: Rotation axis L2: Rotation centerline

A: axis direction

Claims (5)

An input side rotating member which is integrally rotated with the drive member, a support shaft provided on the input side rotating member, a weight having an insertion hole into which the support shaft is inserted, the weight being slidably and freely supported on the support shaft, and an output side rotating member. In the wet centrifugal clutch, the torque of the drive member to the output side rotating member is transmitted and interrupted by the weight swinging about the support shaft in accordance with the generated centrifugal force. A wet centrifugal clutch characterized in that an oil supply passage for supplying lubricant to the insertion hole is formed by using the structural member of the centrifugal clutch. The wet centrifugal clutch according to claim 1, wherein the lubricating oil of the oil supply passage is pressurized by the centrifugal force generated by the rotation of the input side rotating member and supplied to the insertion hole. The wet centrifugal clutch according to claim 1 or 2, wherein the structural member is the weight, and an outlet of the oil supply passage is opened at an intermediate portion of the insertion hole in a swing center line direction. According to claim 3, wherein the weight is composed of a plurality of laminated plate material, at least one of the plurality of plate material is a plate material having a groove formed grooves reaching the insertion hole on the side in the stacking direction, The oil supply passage is a wet centrifugal clutch comprising a through hole formed by the groove and the plate covering the groove in the lamination direction. 3. The constituent member according to claim 2, wherein the constituent member is the input side rotating member and the weight having contact surfaces in contact with each other, and the oil supply passage is formed on the contact surface of at least one of the input side rotating member and the weight to reach the insertion hole. And a through hole formed by the input side rotating member and at least the other side of the weight covering the groove in the rotation axis direction of the drive member.