Power transmission device

Abstract

The present application provides a power transmission device capable of supplying sufficient oil to a driven-side clutch plate mounted to a pressure member. The power transmission device includes a clutch member coupled to an output shaft (3) capable of rotating a wheel of a vehicle; and a pressure member (5) capable of moving between an operating position and a non-operating position, the operating position being a position in which a driving-side clutch plate and the driven-side clutch plate are in pressure contact to become a state in which driving force of an engine can be transmitted to the wheel, and the non-operating position being a position in which pressure contact force of the driving-side clutch plate and the driven-side clutch plate is released to become a position in which transmission of the driving force of the engine to the wheel is cut off. The driven-side clutch plate (7a, 7b) is mounted to the second clutch member (4b) and the pressure member (5), and the pressure member (5) is formed with an oil flow passage capable of causing oil to flow toward the driven-side clutch plate (7b) mounted to the pressure member (5).

Description

Technical Field

[0001] The present invention relates to a power transmission device capable of arbitrarily transmitting the rotational force of an input component to an output component or cutting off the rotational force. Background Technology

[0002] Typically, a motorcycle's power transmission device is used to arbitrarily transmit or disconnect the engine's driving force to the transmission and drive wheels, and includes: an input component connected to the engine side; an output component connected to the transmission and drive wheels side; a clutch component connected to the output component; and a pressure component capable of approaching or separating from the clutch component. It is configured such that by bringing the pressure component close to the clutch component, the drive-side clutch plate and the driven-side clutch plate come into pressure contact, thereby transmitting power; and by separating the pressure component from the clutch component, the pressure contact force between the drive-side clutch plate and the driven-side clutch plate is released, thereby disconnecting the power transmission.

[0003] As a conventional power transmission device, such as that disclosed in Patent Document 1, an example is a power transmission device in which multiple oil supply holes are formed on the clutch component, allowing oil supplied from the center of rotation (clutch operating shaft) to flow through these oil supply holes to the drive-side clutch plate and the driven-side clutch plate. This allows sufficient oil to be supplied to the drive-side clutch plate and the driven-side clutch plate, enabling smooth pressure contact and release of pressure contact force between these two clutch plates.

[0004] Existing technical documents

[0005] Patent documents

[0006] Patent Document 1: Japanese Patent Application Publication No. 2011-163425 Summary of the Invention

[0007] The problem that the invention aims to solve

[0008] However, in the aforementioned conventional power transmission devices, since the driven-side clutch plate is specifically mounted on the clutch assembly, although oil can be adequately supplied by flowing through the oil supply hole formed on the clutch assembly, it becomes difficult to supply oil from the oil supply hole formed on the clutch assembly to the driven-side clutch plate mounted on the pressure assembly in the case of a power transmission device where the driven-side clutch plate is also mounted on the pressure assembly in addition to the clutch assembly. Furthermore, depending on the form of the power transmission device and the applicable vehicle, it is anticipated that it will be necessary to specifically supply oil to the driven-side clutch plate mounted on the pressure assembly.

[0009] The present invention was made in view of the following circumstances, and its object is to provide a power transmission device that can supply sufficient oil to the driven side clutch plate mounted on the pressure component.

[0010] Technical solutions for solving the problem

[0011] The invention described in technical solution 1 is a power transmission device comprising: a clutch housing that rotates together with an input component that utilizes the driving force of a vehicle's engine and is equipped with a plurality of drive-side clutch plates; a clutch component that is equipped with a plurality of driven-side clutch plates that alternate with the drive-side clutch plates of the clutch housing and is connected to an output component capable of rotating the wheels of the vehicle; and a pressure component that is movable between an operating position and a non-operating position, wherein the operating position is such that the drive-side clutch plates and the driven-side clutch plates are in pressure contact, enabling the transmission of the driving force of the engine to the wheels, and the non-operating position is such that the pressure contact force between the drive-side clutch plates and the driven-side clutch plates is released, cutting off the transmission of the driving force of the engine to the wheels. The power transmission device is characterized in that the driven-side clutch plates are mounted on the clutch component and the pressure component, and the pressure component forms an oil flow path that allows oil to flow toward the driven-side clutch plates mounted on the pressure component.

[0012] The invention described in technical solution 2 is based on the power transmission device described in technical solution 1, characterized in that the power transmission device includes a clutch spring that applies force in a direction that causes the driving-side clutch plate and the driven-side clutch plate to pressurize or separate, the pressure member has a receiving recess for receiving the clutch spring and a flange portion that enables the driven-side clutch plate and the driving-side clutch plate to pressurize, and the oil flow path enables oil to flow through the receiving recess toward the flange portion.

[0013] The invention described in technical solution 3 is based on the power transmission device described in technical solution 2, characterized in that the oil flow path has an oil inlet portion that opens toward the center side of the pressure member in the receiving recess and an oil outlet portion that opens toward the outer diameter side of the pressure member, and is able to allow oil flowing into the receiving recess from the oil inlet portion to flow out from the oil outlet portion and flow toward the driven side clutch plate mounted on the pressure member.

[0014] The invention described in technical solution 4 is based on the power transmission device described in technical solution 3, characterized in that the oil inflow portion is formed by a first hole on the bottom side of the receiving recess for supporting one end of the clutch spring, and the oil outflow portion is formed by a second hole on the flange side of the pressure member, and a groove is formed that allows oil to flow from the opening edge of the receiving recess to the second hole.

[0015] The invention described in technical solution 5 is based on the power transmission device of any one of technical solutions 1 to 4, characterized in that the clutch component is formed with an oil supply hole that allows oil to flow toward the driven side clutch plate mounted on the clutch component.

[0016] The invention described in technical solution 6 is based on the power transmission device described in technical solution 5, characterized in that the clutch component has: a first clutch component connected to the output component; and a second clutch component on which the driven side clutch plate is mounted, and a plurality of oil supply holes are formed in the first clutch component and the second clutch component respectively.

[0017] Invention Effects

[0018] According to the invention of technical solution 1, since the driven side clutch plate is installed on the clutch component and the pressure component, and the pressure component forms an oil flow path that allows oil to flow toward the driven side clutch plate installed on the pressure component, it is possible to supply sufficient oil to the driven side clutch plate installed on the pressure component.

[0019] According to the invention of technical solution 2, since the pressure component has a receiving recess for accommodating the clutch spring and a flange portion that enables the driven side clutch plate to make pressure contact with the driving side clutch plate, and the oil flow path enables oil to flow through the receiving recess toward the flange portion, oil can be supplied to the driven side clutch plate mounted on the pressure component using the receiving recess.

[0020] According to the invention of technical solution 3, the oil flow path has an oil inlet portion that opens toward the center side of the pressure member in the receiving recess and an oil outlet portion that opens toward the outer diameter side of the pressure member. Oil flowing into the receiving recess from the oil inlet portion can flow out from the oil outlet portion and flow toward the driven side clutch plate mounted on the pressure member. Therefore, the oil can be made to flow through the receiving recess by using centrifugal force, and oil can be smoothly supplied to the driven side clutch plate mounted on the pressure member.

[0021] According to the invention of technical solution 4, since the oil inflow portion is formed by a first hole on the bottom side of the receiving recess for supporting the clutch spring, and the oil outflow portion is formed by a second hole on the flange side of the pressure member, and a groove is formed that allows oil to flow from the opening edge of the receiving recess to the second hole, the oil flowing into the receiving recess from the first hole can flow to the opening side of the receiving recess, and the oil can flow out from the second hole through the groove, thus reliably supplying oil to the driven side clutch plate mounted on the pressure member.

[0022] According to the invention of technical solution 5, since the clutch component has an oil supply hole that allows oil to flow toward the driven side clutch plate mounted on the clutch component, oil can be adequately supplied to the driven side clutch plate mounted on the clutch component and the pressure component.

[0023] According to the invention of technical solution 6, since the clutch component has: a first clutch component connected to the output component; and a second clutch component with a driven side clutch plate installed, and multiple oil supply holes are formed in the first clutch component and the second clutch component respectively, even if the clutch component is divided into a first clutch component and a second clutch component, oil can be reliably supplied to the driven side clutch plate installed in the clutch component and the pressure component. Attached Figure Description

[0024] Figure 1 This is an external view showing the power transmission device according to an embodiment of the present invention.

[0025] Figure 2 This is a longitudinal sectional view showing the internal structure of the power transmission device.

[0026] Figure 3 yes Figure 2 A magnified view of a portion of the image.

[0027] Figure 4 yes Figure 2 A magnified view of a portion of the image.

[0028] Figure 5 This is a perspective view of the clutch housing in the power transmission device.

[0029] Figure 6 This is a three-view view showing the first clutch component in the power transmission device.

[0030] Figure 7 This is a perspective view of the first clutch component.

[0031] Figure 8 This is a three-view drawing showing the second clutch component in the power transmission device.

[0032] Figure 9 This is a perspective view of the second clutch component.

[0033] Figure 10 This is a three-view drawing showing the pressure component in the power transmission device.

[0034] Figure 11 yes Figure 10 Sectional view along line XI-XI.

[0035] Figure 12 This is a perspective view taken from the surface side of the pressure component.

[0036] Figure 13 This is a perspective view of the pressure component viewed from the rear side.

[0037] Figure 14 This is a longitudinal sectional view showing the centrifugal clutch unit in the power transmission device.

[0038] Figure 15 This is a three-dimensional view showing a partial cross-section of the centrifugal clutch unit.

[0039] Figure 16 This is a schematic diagram illustrating the function of (a) the pressure contact auxiliary cam and (b) the anti-torque limiter cam in the power transmission device.

[0040] Figure 17 This is a schematic diagram showing a vehicle that uses this power transmission device.

[0041] Figure 18 This is a cross-sectional view showing the state of the counterweight component in the power transmission device located on the inner diameter side.

[0042] Figure 19 This is a cross-sectional view showing the state of the counterweight component in the power transmission device at an intermediate position between the inner diameter side position and the outer diameter side position.

[0043] Figure 20 This is a cross-sectional view showing the position of the counterweight component in the power transmission device on the outer diameter side.

[0044] Figure 21 This is a cross-sectional view showing the counterweight component in the power transmission device located on the outer diameter side and the pressure component in the operating position.

[0045] Figure 22 This is a longitudinal sectional view showing a power transmission device according to other embodiments of the present invention.

[0046] Figure 23 This is a longitudinal sectional view showing a power transmission device according to another embodiment of the present invention.

[0047] Figure 24 This is a longitudinal sectional view showing a power transmission device according to another embodiment of the present invention (having an oil inlet portion in the shape of an elongated hole).

[0048] Figure 25 This is a perspective view of the pressure component in the power transmission device from the surface side.

[0049] Figure 26 This is a perspective view of the pressure component in the power transmission device, viewed from the rear side. Detailed Implementation

[0050] Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0051] like Figure 17 As shown, the power transmission device K involved in this embodiment is installed on the vehicle and is used to arbitrarily transmit or disconnect the driving force of the engine E to the drive wheel T via the transmission M, such as... Figures 1-15 As shown, the configuration includes: a clutch housing 2 with an input gear 1 (input component) that rotates under the driving force of the vehicle's engine E; an output shaft 3 (output component) connected to the transmission M; clutch components (first clutch component 4a and second clutch component 4b); a pressure component 5; multiple drive-side clutch plates (6a, 6b) and multiple driven-side clutch plates (7a, 7b); a centrifugal clutch unit 9 equipped with a counterweight component 10; and an auxiliary clutch plate 17.

[0052] The input gear 1, when subjected to driving force (rotational force) transmitted from the engine E, can rotate around the output shaft 3 and is connected to the clutch housing 2 via rivets, etc. The clutch housing 2 is composed of... Figure 2 It is composed of a cylindrical component with an opening at the right end and is connected to the input gear 1. It can rotate together with the rotation of the input gear 1 by the driving force of the engine E.

[0053] In addition, such as Figure 5 As shown, the clutch housing 2 has multiple slits 2a formed along its entire circumference, and multiple drive-side clutch plates (6a, 6b) are fitted into these slits 2a. These drive-side clutch plates (6a, 6b) are each made of a plate formed in a generally annular shape, and are configured to rotate together with the clutch housing 2, and are capable of axial rotation (…). Figure 2 (Slides in the left and right directions). In addition, the clutch plate installed at the position corresponding to the second clutch component 4b is used as the drive-side clutch plate 6a, and the clutch plate installed at the position corresponding to the pressure component 5 is used as the drive-side clutch plate 6b.

[0054] The clutch assembly (first clutch assembly 4a and second clutch assembly 4b) is equipped with a plurality of driven clutch plates 7a that alternate with the drive-side clutch plates 6a of the clutch housing 2, and is connected to the output shaft 3 (output assembly) that can rotate the drive wheel T via the vehicle's transmission M. The first clutch assembly 4a and the second clutch assembly 4b are assembled together.

[0055] The first clutch component 4a is configured such that a through hole (see reference) is formed in its center. Figure 6 , 7 The output shaft 3 is inserted through the middle, and the gears formed by them mesh and are connected in the direction of rotation. For example... Figure 6 , 7 As shown, the first clutch component 4a has an inclined surface 4aa constituting a pressure contact assist cam and an inclined surface 4ab constituting a torque limiter cam. Furthermore, the symbol 4ac in the figure represents a boss portion having a through hole for a bolt B used to connect the first clutch component 4a and the fixing component 8.

[0056] In addition, such as Figure 2 As shown, the output shaft 3, which is inserted into the first clutch component 4a, has an axially extending insertion hole 3a through which oil is supplied to the clutch housing 2. Furthermore, an operating component 18, composed of a rod-shaped member, is inserted into the insertion hole 3a, and an operating part 18a is mounted at the front end of the operating component 18. This operating part 18a is assembled by abutting against a linkage component 19, which is connected to a bearing W that rotatably supports the pressure component 5. Moreover, when the clutch operating unit (not shown) is operated, the operating component 18... Figure 2 When the middle right side moves, the operating part 18a presses the linkage member 19, so that the pressure member 5 can be pressed in the same direction, causing it to move from the operating position to the non-operating position.

[0057] like Figure 8 , 9 As shown, the second clutch component 4b is composed of an annular component with a flange portion 4bb, and is configured such that a driven-side clutch plate 7a is splinedly fitted onto a splined engagement portion 4ba formed on the outer peripheral surface. Furthermore, as... Figures 2-4 As shown, a pressure member 5 is assembled on the clutch components (first clutch component 4a and second clutch component 4b). Multiple drive-side clutch plates (6a, 6b) and driven-side clutch plates (7a, 7b) are installed alternately between the flange portion 5c of the pressure member 5 and the flange portion 4bb of the second clutch component 4b.

[0058] like Figures 10-13As shown, the pressure member 5 is composed of a circular plate-shaped member with a flange 5c formed on its entire periphery. It can move between an operating position and a non-operating position. The operating position is a position in which the driving side clutch plates (6a, 6b) and the driven side clutch plates (7a, 7b) are in pressure contact, so that the driving force of the engine E can be transmitted to the wheels. The non-operating position is a position in which the pressure contact force between the driving side clutch plates (6a, 6b) and the driven side clutch plates (7a, 7b) is released, so that the transmission of the driving force of the engine E to the wheels can be cut off.

[0059] More specifically, such as Figure 8 , 9 As shown, the spline engagement portion 4ba formed on the second clutch component 4b is configured as a concave-convex shape integrally formed on approximately the entire circumference of the outer peripheral side surface of the second clutch component 4b, and is configured such that by engaging the driven side clutch plate 7a in the groove constituting the spline engagement portion 4ba, the driven side clutch plate 7a is allowed to move axially relative to the second clutch component 4b, and its rotational direction movement is restricted, and it can rotate together with the second clutch component 4b.

[0060] In addition, such as Figure 4 As shown, in this embodiment, the first clutch component 4a and the second clutch component 4b are each provided with a plurality of oil supply holes (4ad, 4bc) that allow oil to flow toward the driven-side clutch plate 7a mounted on the second clutch component 4b. That is, oil supplied from the insertion hole 3a at the front end of the output shaft 3 is supplied to the driven-side clutch plate 7a via the oil supply hole 4ad formed in the first clutch component 4a and the oil supply hole 4bc formed in the second clutch component 4b.

[0061] On the other hand, a plurality of protruding engagement portions 5i are formed on the periphery of the pressure member 5 in the entire circumferential direction, and a driven-side clutch plate 7b is mounted on these engagement portions 5i in an engaged state. The driven-side clutch plate 7b is configured such that one side contacts the driving-side clutch plate 6b and the other side contacts the driving-side clutch plate 6a, and is mounted in a stacked state, allowing axial movement relative to the pressure member 5 while restricting its rotational movement, and is able to rotate together with the pressure member 5.

[0062] However, the driven-side clutch plates (7a, 7b) and the driving-side clutch plates (6a, 6b) are alternately stacked, and adjacent clutch plates (6a, 6b, 7a, 7b) can engage or release pressure contact force. That is, each clutch plate (6a, 6b, 7a, 7b) is allowed to slide axially toward the second clutch component 4b and the pressure component 5. The clutch is engaged by the pressure contact of each clutch plate (6a, 6b, 7a, 7b), thus transmitting the rotational force of the clutch housing 2 to the output shaft 3 via the second clutch component 4b and the first clutch component 4a. The clutch is disengaged by the release of the pressure contact force of each clutch plate (6a, 6b, 7a, 7b), so the first clutch component 4a and the second clutch component 4b do not follow the rotation of the clutch housing 2 and do not transmit rotational force to the output shaft 3.

[0063] Therefore, when the drive-side clutch plates (6a, 6b) and the driven-side clutch plates (7a, 7b) are in pressure contact, the rotational force (driving force of engine E) input to the clutch housing 2 is transmitted to the drive wheel side (transmission M) via the output shaft 3 (output component). And when the pressure contact between the drive-side clutch plates (6a, 6b) and the driven-side clutch plates (7a, 7b) is released, the transmission of the rotational force (driving force of engine E) input to the clutch housing 2 to the output shaft 3 (output component) can be cut off.

[0064] In addition, such as Figure 9 , 10 As shown, the pressure member 5 has multiple (three in this embodiment) receiving recesses 5d formed along its entire circumference, and a clutch spring S is embedded in each receiving recess 5d. Figure 2 , 3 As shown, the clutch spring S is housed in the receiving recess 5d, and one end abuts against the fixed member 8, applying force to the pressure member 5 in the direction of pressure contact between the driving side clutch plate (6a, 6b) and the driven side clutch plate (7a, 7b).

[0065] Furthermore, by operating the clutch operating unit (not shown), the operating member 18 is moved, thereby moving the linkage member 19 towards... Figure 2 When the right side is pressed, the pressure component 5 is pressed in the same direction and moved to the non-operating position, which enables the pressure contact or release between the drive-side clutch plates (6a, 6b) and the driven-side clutch plates (7a, 7b).

[0066] In addition, in this embodiment, such as Figure 6 , 7As shown in Figures 10, 12, and 13, inclined surfaces 4aa and 4ab are formed on the first clutch component 4a, and inclined surfaces 5a and 5b are formed on the pressure component 5 facing these inclined surfaces 4aa and 4ab. That is, inclined surfaces 4aa and 5a abut to form a pressure contact auxiliary cam, and inclined surfaces 4ab and 5b abut to form a torque limiter cam.

[0067] Furthermore, when the engine speed E increases, and the rotational force input to the input gear 1 and clutch housing 2 can be transmitted to the output shaft 3 via the first clutch component 4a and the second clutch component 4b (with the counterweight component 10 located on the outer diameter side), as... Figure 16 As shown in (a), due to the rotational force applied to the pressure member 5 in the direction a, a force in the direction c in the figure is generated on the pressure member 5 by the action of the pressure contact auxiliary cam. Consequently, the pressure member 5 moves further toward its flange 5c towards the flange 4bb of the second clutch member 4b in the direction c. Figure 2 The left side moves, increasing the pressure contact force between the drive-side clutch plates (6a, 6b) and the driven-side clutch plates (7a, 7b).

[0068] On the other hand, when the rotation of the output shaft 3 exceeds the rotational speed of the input gear 1 and the clutch housing 2, generating a counter-torque, such as Figure 16 As shown in (b), due to the rotational force applied to the clutch assembly 4 in the b direction, the pressure assembly 5 is moved in the d direction in the figure by the action of the anti-torque limiter cam, thereby releasing the pressure contact force between the drive-side clutch plates (6a, 6b) and the driven-side clutch plates (7a, 7b). This avoids adverse effects on the power transmission device K and the power source (engine E side) caused by the anti-torque.

[0069] like Figure 14 , 15 As shown, the centrifugal clutch unit 9 includes a counterweight 10, which can be moved from the inner diameter side position (see reference 2) by the centrifugal force accompanying the rotation of the clutch housing 2. Figure 18 Move to the outer diameter side position (refer to) Figure 20 The centrifugal clutch unit 9 is configured such that when the counterweight member 10 is in the outer diameter side position, the driving side clutch plates (6a, 6b) and the driven side clutch plates (7a, 7b) are in pressure contact, so that the driving force of the engine E can be transmitted to the wheel (drive wheel T). When the counterweight member 10 is in the inner diameter side position, the pressure contact force between the driving side clutch plates (6a, 6b) and the driven side clutch plates (7a, 7b) can be released, thereby cutting off the transmission of the driving force of the engine E to the wheel (drive wheel T).

[0070] Specifically, the centrifugal clutch unit 9 is configured to include: a counterweight member 10 composed of block-shaped components; a retaining member 11 on which a support member 13 is mounted; a pressure contact member 12; a first spherical member 14; a second spherical member 15; and a force-applying member 16 composed of a coil spring. Furthermore, the retaining member 11 and the pressure contact member 12 have multiple protrusions formed along their entire circumference, and are fitted into the cutout 2a of the clutch housing 2, similar to the drive-side clutch plate 6. Thus, the retaining member 11 and the pressure contact member 12 are each movable axially in the clutch housing 2, and can engage in the rotational direction to rotate together with the clutch housing 2.

[0071] like Figure 14 As shown, the counterweight 10 is housed in the receiving portion 11a of the retaining member 11, and is held in the inner diameter side position without being subjected to centrifugal force. When subjected to centrifugal force, it overcomes the force exerted by the force-applying member 16 and moves outward to the outer diameter side position. The retaining member 11 holds the counterweight 10 in a manner that allows it to move between the inner diameter side position and the outer diameter side position, as shown. Figure 15 As shown, the retaining member 11 is composed of an annular member and is configured to have a receiving portion 11a having a plurality of portions formed in the entire circumference and accommodating the counterweight member 10, a groove shape 11b formed in the receiving portion 11a, and a pressing surface 11c.

[0072] Each receiving portion 11a is formed by a concave shape that matches the shape and range of motion of the counterweight member 10, and is configured such that one end of the force-applying member 16 can abut against its outer peripheral wall surface 11aa. In addition, a support member 13 is fixed on the surface of the holding member 11 where the receiving portion 11a is formed, and the counterweight member 10 is held by the support member 13 in a manner that allows it to move radially.

[0073] The counterweight 10 moves from the inner diameter side to the outer diameter side, and the pressure contact component 12 moves in the stacking direction of the drive-side clutch plates (6a, 6b) and the driven-side clutch plates (7a, 7b). Figure 2 The right side of the clutch moves, causing the drive-side clutch plates (6a, 6b) to come into pressure contact with the driven-side clutch plates (7a, 7b). Specifically, as... Figure 15 As shown, the pressure contact component 12 is composed of an annular component and is configured to have: a plurality of inclined grooves 12a formed in the entire circumferential direction; groove shapes 12b formed at the positions where the inclined grooves 12a are formed; and a pressing surface 12c.

[0074] Inclined grooves 12a are formed at positions corresponding to the counterweight member 10, and slope upwards from the inside to the outside. Thus, when the clutch housing 2 is stopped, the force applied by the force-applying member 16 keeps the counterweight member 10 in the inner diameter position (see reference). Figure 18And when the clutch housing 2 rotates, it applies centrifugal force to the counterweight 10, causing it to move along the upwardly inclined groove 12a, thereby moving the pressure contact member 12 away from the holding member 11 (i.e., the direction in which the drive-side clutch plates (6a, 6b) and the driven-side clutch plates (7a, 7b) make pressure contact) (see reference). Figure 19 , 20 ).

[0075] Therefore, as Figure 14 , 15 As shown, when the retaining component 11 and the pressure contact component 12 are assembled together with the counterweight component 10 in between, the inclined groove 12a is positioned correspondingly to each counterweight component 10. Due to centrifugal force, the counterweight component 10 moves from the inner diameter side to the outer diameter side and along the inclined groove 12a, while the pressure contact component 12 moves towards... Figure 14 The component moves in the direction of the middle arrow (right side in the figure), and the pressing surface 12c formed on the pressure contact component 12 presses the driving side clutch plate (6a, 6b) and the driven side clutch plate (7a, 7b) to form a pressure contact state, and the holding component 11 uses its reaction force to move towards the driving side clutch plate (6a, 6b) and the driven side clutch plate (7a, 7b). Figure 14 The middle arrow moves in the opposite direction (left side in the figure) and the pressing surface 11c formed on the retaining member 11 makes pressure contact with the auxiliary clutch plate 17.

[0076] The first spherical component 14 is composed of a steel ball mounted on the counterweight component 10. A portion of the spherical component 14 protrudes from one opening in the through hole formed in the counterweight component 10 and contacts the rolling surface of the pressure contact component 12, thereby enabling it to roll. The second spherical component 15 is also composed of a steel ball mounted on the counterweight component 10. A portion of the spherical component 15 protrudes from another opening in the through hole formed in the counterweight component 10 and contacts the rolling surface of the retaining component 11, thereby enabling it to roll.

[0077] That is, the counterweight component 10 is held in the inner diameter position without being subjected to centrifugal force (see reference). Figure 18 This results in a state where the pressure contact force between the drive-side clutch plates (6a, 6b) and the driven-side clutch plates (7a, 7b) is released. When centrifugal force is applied, such as... Figure 19 As shown, the counterweight component 10 moves outward and reaches the outer diameter side position (refer to...). Figure 20 The drive-side clutch plates (6a, 6b) and driven-side clutch plates (7a, 7b) are in pressure contact, allowing the driving force of engine E to be transmitted to the wheels T. Furthermore, Figure 21 This indicates that when the counterweight component 10 is in the outer diameter side position, the pressure component 5 moves to the non-operating position, and the pressure contact force between the drive-side clutch plate (6a, 6b) and the driven-side clutch plate (7a, 7b) is released.

[0078] The auxiliary clutch plate 17 is disposed within the clutch housing 2 and is composed of an annular component with a different diameter (in this embodiment, a smaller diameter than the driving-side clutch plates (6a, 6b) and driven-side clutch plates (7a, 7b)) than the driving-side clutch plates (6a, 6b) and driven-side clutch plates (7a, 7b). Figure 2 As shown, the output shaft 3 (output component) is inserted through its central opening to form a fitted state, and is configured to have a pressed surface facing the pressing surface 11c of the holding component 11.

[0079] When the counterweight member 10 is in the outer diameter side position (i.e., when the drive-side clutch plates (6a, 6b) and driven-side clutch plates (7a, 7b) are in pressure contact), the auxiliary clutch plate 17 can transmit the driving force of the engine E to the output shaft 3 when pressed by the pressing surface 11c formed on the retaining member 11. Furthermore, when the counterweight member 10 is in the inner diameter side position (i.e., when the pressure contact force between the drive-side clutch plates (6a, 6b) and driven-side clutch plates (7a, 7b) is released), the transmission of the driving force of the engine E to the output shaft 3 can be cut off when the pressing force of the pressing surface 11c formed on the retaining member 11 decreases and the pressure contact force is released.

[0080] That is, when the counterweight component 10 moves to the outer diameter side position, the tilting groove 12a functions as a cam, keeping the component 11 and the pressure contact component 12 moving in a direction of separation. As a result, the pressing surface 12c of the pressure contact component 12 makes the drive-side clutch plates (6a, 6b) and the driven-side clutch plates (7a, 7b) press against each other, and the pressing surface 11c of the holding component 11 presses against the pressed surface of the auxiliary clutch plate 17 to make pressure contact, so the driving force of the engine E is transmitted to the drive wheel T.

[0081] In this embodiment, the pressure member 5 is formed with an oil flow path that allows oil to flow toward the driven side clutch plate 7b mounted on the pressure member 5. Figures 10-13 As shown, the oil flow path is configured to have an oil inlet portion 5e, a groove portion 5f, and an oil outlet portion 5g, which allows oil to flow through the receiving recess 5d of the clutch spring S toward the flange portion 5c of the pressure member 5.

[0082] like Figure 11 , 13 As shown, the oil inflow portion 5e is formed by a first hole on the bottom side (the portion supporting one end of the clutch spring S) of the receiving recess 5d, and opens into the receiving recess 5d toward the center side of the pressure member 5. Figure 11 , 12As shown, the oil outlet 5g is composed of a second hole formed on the flange portion 5c side of the pressure member 5, and is formed to open toward the outer diameter side of the pressure member 5.

[0083] Furthermore, the groove 5f is formed in the shape of a groove on the surface side of the pressure member 5, and is formed by connecting the opening edge of the receiving recess 5d to the oil outlet 5g (second hole), allowing oil to flow from the opening edge of the receiving recess 5d to the oil outlet 5g (second hole). Moreover, as... Figure 3 As shown, the oil supplied from the through hole 3a (refer to R1 in the figure) flows along the surface 5h, which is closer to the inner diameter than the receiving recess 5d, due to centrifugal force, thereby reaching the oil inlet 5e (first hole), and flowing into the receiving recess 5d (refer to R2 in the figure) through the oil inlet 5e.

[0084] The oil flowing into the receiving recess 5d flows along the inner circumferential surface 5da of the receiving recess 5d toward the opening side, flows through the groove 5f, and flows out from the oil outlet 5g (refer to R3 in the figure). The oil flowing out from the outlet 5g reaches the driven side clutch plate 7b mounted on the pressure member 5, and is supplied to the driven side clutch plate 7b and the drive side clutch plate 6b (including the adjacent drive side clutch plate 6a) stacked with the driven side clutch plate 7b. That is, oil is supplied to the driven side clutch plate 7a (including the area of ​​the drive side clutch plate 6a stacked with the driven side clutch plate 7a) through the oil supply hole 4ad of the first clutch member 4a and the oil supply hole 4bc of the second clutch member 4b, and oil is supplied to the driven side clutch 7b (including the area of ​​the drive side clutch plate 6a stacked with the driven side clutch plate 7a) through the oil inlet 5e, the groove 5f, and the oil outlet 5g that constitute the oil flow path of the pressure member 5.

[0085] Moreover, in this embodiment, such as Figure 11 As shown, surface 5h is formed with a draft angle α, and the inner peripheral surface 5da that receives the recess 5d is formed with a draft angle β. Thus, oil flowing along surface 5h flows smoothly towards oil inflow portion 5e through draft angle α, and oil flowing along inner peripheral surface 5da flows smoothly towards groove portion 5f through draft angle β.

[0086] According to this embodiment, driven-side clutch plates (7a, 7b) are mounted on a clutch assembly (second clutch assembly 4b) and a pressure assembly 5. The pressure assembly 5 is formed with an oil flow path that allows oil to flow toward the driven-side clutch plate 7b mounted on the pressure assembly 5. Therefore, sufficient oil supply can be achieved to the driven-side clutch plate 7b mounted on the pressure assembly 5 (including the range of the drive-side clutch plate 6b stacked with the driven-side clutch plate 7b).

[0087] Furthermore, the pressure member 5 in this embodiment has a receiving recess 5d for accommodating the clutch spring S and a flange 5c for pressurizing the driven side clutch plate (7a, 7b) and the driving side clutch plate (6a, 6b). The oil flow path allows oil to flow through the receiving recess 5d toward the flange 5c. Therefore, oil can be supplied to the driven side clutch plate 7b mounted on the pressure member 5 using the receiving recess 5d.

[0088] Furthermore, the oil flow path has an oil inlet portion 5e that opens toward the center side of the pressure member 5 in the receiving recess 5d; and an oil outlet portion 5g that opens toward the outer diameter side of the pressure member 5. Oil flowing into the receiving recess 5d from the oil inlet portion 5e can flow out through the oil outlet portion 5g and flow toward the driven side clutch plate 7b mounted on the pressure member 5. Therefore, the oil can be flowed through the receiving recess 5d by centrifugal force, and oil can be smoothly supplied to the driven side clutch plate 7b mounted on the pressure member 5.

[0089] Furthermore, since the oil inflow portion 5e is formed by a first hole on the bottom side of the receiving recess 5d that supports one end of the clutch spring S, and the oil outflow portion 5g is formed by a second hole on the flange portion 5c side of the pressure member 5, and a groove portion 5f is formed that allows oil to flow from the opening edge of the receiving recess 5d to the second hole, oil flowing into the receiving recess 5d from the first hole (oil inflow portion) can flow to the opening side of the receiving recess 5d, and oil can flow out from the second hole (oil outflow portion) through the groove portion 5f, thereby reliably supplying oil to the driven side clutch plate 7b mounted on the pressure member 5.

[0090] Furthermore, the clutch components (first clutch component 4a and second clutch component 4b) involved in this embodiment are provided with oil supply holes (4ad, 4bc) that allow oil to flow toward the driven side clutch plate 7a mounted on the clutch components (first clutch component 4a and second clutch component 4b), thus enabling sufficient oil supply to the driven side clutch plates (7a, 7b) mounted on the clutch components (second clutch component 4b) and the pressure component 5.

[0091] Furthermore, the clutch component involved in this embodiment has a first clutch component 4a connected to the output component and a second clutch component 4b on which a driven-side clutch plate 7a is mounted. Multiple oil supply holes (4ad, 4bc) are formed on the first clutch component 4a and the second clutch component 4b, respectively. Therefore, even if the clutch component is divided into a first clutch component 4a and a second clutch component 4b, oil can be reliably supplied to the driven-side clutch plates (7a, 7b) mounted on the second clutch component 4b and the pressure component 5.

[0092] The above description illustrates this embodiment, but the present invention is not limited thereto; the oil flow path can also be formed in other locations, for example, as... Figure 22 As shown, the oil inlet portion 5e constituting the oil flow path can also be formed on the opening side of the receiving recess 5d, and the oil outlet portion 5g can also be formed without passing through the groove portion 5f. Furthermore, as... Figure 23 As shown, the clutch component may not be a segmented component and may not have a centrifugal clutch unit 9. It is suitable for a structure in which a boss portion 4ac is formed protruding inside the receiving recess 5d, and an oil inlet portion 5e and an oil outlet portion 5g are formed in the receiving recess 5d.

[0093] In addition, such as Figures 24-26 As shown, instead of the oil inflow portion 5e formed on the bottom side of the receiving recess 5d, an oil inflow portion 5j opening toward the inner side (center side of the pressure member 5) of the receiving recess 5d can be formed. Figure 26 As shown, the oil inlet 5j is formed by an elongated hole opening along the entire axial direction of the pressure member 5, and an oil flow path is formed through the oil inlet 5j, the groove 5f, and the oil outlet 5g (same as in the previous embodiment). Thus, as... Figure 24 As shown, the oil supplied from the through hole 3a flows from the oil inlet 5j, which has a large opening in the axial direction, into the receiving recess 5d due to centrifugal force (refer to arrow Ra in the figure), and flows through the groove 5f and out from the oil outlet 5g (refer to arrow Rb in the figure).

[0094] Furthermore, the oil flow path only needs to be formed in the pressure member 5 and be able to allow oil to flow toward the driven side clutch plate 7b mounted on the pressure member 5, or it can be a passage that does not pass through the receiving recess 5d. In addition, the power transmission device of the present invention can be applied to various multi-plate clutch type power transmission devices such as automobiles, three-wheeled or four-wheeled cars, or general-purpose machines, in addition to motorcycles.

[0095] Industrial applicability

[0096] As long as the driven-side clutch plate is mounted on the clutch assembly and the pressure assembly, and the pressure assembly forms an oil flow path that allows oil to flow toward the driven-side clutch plate mounted on the pressure assembly, it can be applied to devices with different appearances or additional functions.

[0097] Explanation of reference numerals in the attached figures

[0098] 1. Input gear (input component)

[0099] 2. Clutch housing

[0100] 2a Incision

[0101] 3. Output shaft (output component)

[0102] 3a Through-hole

[0103] 4a First clutch component

[0104] 4aa Inclined surface (cam for pressure contact assistance)

[0105] 4ab inclined plane (cam for anti-torque limiter)

[0106] 4ac boss part

[0107] 4ad oil supply hole

[0108] 4b Second Clutch Component

[0109] 4ba spline fitting part

[0110] 4bb flange

[0111] 4bc oil supply hole

[0112] 5 pressure components

[0113] 5a Inclined surface (cam for pressure contact assistance)

[0114] 5b Inclined surface (cam for anti-torque limiter)

[0115] 5c Flange portion

[0116] 5d Recessed section

[0117] 5da inner circumference

[0118] 5e Oil inlet section (oil flow path)

[0119] 5f groove (oil flow path)

[0120] 5g oil outflow section (oil flow path)

[0121] 5h noodles

[0122] 5i Fitting Part

[0123] 5j Oil inlet section (oil flow path)

[0124] 6a, 6b drive-side clutch plates

[0125] 7a, 7b Driven side clutch plates

[0126] 8. Fixing components

[0127] 9 Centrifugal Clutch Unit

[0128] 10 Counterweight Components

[0129] 11 Retaining components

[0130] 11a Containment Department

[0131] 11aa inner peripheral wall surface

[0132] 11b groove shape

[0133] 11c Pressing surface

[0134] 12 Pressure contact components

[0135] 12a Inclined groove

[0136] 12b groove shape

[0137] 12c Pressing surface

[0138] 13 Support components

[0139] 14 First spherical component

[0140] 15 Second spherical component

[0141] 16 Force-applying components

[0142] 17. Auxiliary clutch plate

[0143] 18 Operating components

[0144] 18a Operations Section

[0145] 19 Linkage Components

[0146] B bolt

[0147] S clutch spring

[0148] W bearing

Claims

1. A power transmission device, comprising: A clutch assembly is housed in a clutch housing, which rotates together with an input component that rotates using the driving force of the vehicle's engine and is equipped with a plurality of drive-side clutch plates. The clutch assembly is equipped with a plurality of driven-side clutch plates that alternate with the drive-side clutch plates and is connected to an output component that can rotate the vehicle's wheels and supply oil from an opening at the front end. A pressure component is movable between an operating position and a non-operating position. The operating position is a position in which the driving-side clutch plate and the driven-side clutch plate are in pressure contact, enabling the transmission of the engine's driving force to the wheels. The non-operating position is a position in which the pressure contact between the driving-side clutch plate and the driven-side clutch plate is released, cutting off the transmission of the engine's driving force to the wheels. The clutch spring applies force in the direction that causes the driving-side clutch plate to pressure contact or separate from the driven-side clutch plate, wherein... The pressure component has: A recess is provided to accommodate the clutch spring. The sidewall extends along the axial direction of the output component and divides the receiving recess, and at least a portion of it is located radially between the clutch spring and the output component, and in a cross section along the axial direction of the output component, it is located between the clutch spring and the opening. The bottom wall is continuous with the side wall and extends radially, and demarcates the receiving recess; An oil inlet is formed in the boundary portion between the sidewall and the bottom wall, at least a portion of which faces the output component in the radial direction and does not overlap with the opening when viewed from the axial direction, and allows oil to flow into the receiving recess; and The oil supply port supplies oil flowing into the receiving recess toward the driven side clutch plate mounted on the pressure member.

2. The power transmission device according to claim 1, wherein, The oil inlet is formed in the portion of the boundary between the sidewall and the bottom wall in the radial direction, closest to the output component, and opens toward the output component.

3. A power transmission device, comprising: A clutch assembly is housed in a clutch housing, which rotates together with an input component that rotates using the driving force of the vehicle's engine and is equipped with a plurality of drive-side clutch plates. The clutch assembly is equipped with a plurality of driven-side clutch plates that alternate with the drive-side clutch plates and is connected to an output component that enables the vehicle's wheels to rotate. A pressure component is movable between an operating position and a non-operating position. The operating position is a position in which the driving-side clutch plate and the driven-side clutch plate are in pressure contact, enabling the transmission of the engine's driving force to the wheels. The non-operating position is a position in which the pressure contact between the driving-side clutch plate and the driven-side clutch plate is released, cutting off the transmission of the engine's driving force to the wheels. The clutch spring applies force in the direction that causes the driving-side clutch plate to pressure contact or separate from the driven-side clutch plate, wherein... The pressure component has: A recess is provided to accommodate the clutch spring. A flange portion, located radially outward from the receiving recess, enables the driven-side clutch plate to make pressure contact with the driving-side clutch plate; and An oil supply port is located on the opening end side of the receiving recess, with at least a portion located radially outward from the receiving recess, and supplies oil toward the driven-side clutch plate mounted on the pressure member. A portion of the oil supply port is formed in the flange.

4. The power transmission device according to claim 3, wherein, The pressure component has an oil inlet that opens toward the center of the pressure component in the receiving recess. The oil inlet is a first hole formed on the bottom side of the receiving recess at one end that supports the clutch spring. The oil supply port is a second hole that opens towards the outer diameter side of the pressure component. The pressure member has a groove that allows oil to flow from the opening edge of the receiving recess to the second hole. Oil flowing from the first hole into the receiving recess flows out through the groove from the second hole and flows toward the driven side clutch plate mounted on the pressure member.

5. The power transmission device according to claim 1 or 3, wherein, The clutch component has: A first clutch component is connected to the output component; and The second clutch assembly is equipped with the driven-side clutch plate. The first clutch component and the second clutch component each have a plurality of oil supply holes formed therein, which allow oil to flow toward the driven side clutch plate mounted on the second clutch component.

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