JP3582288B2 - Motorcycle tricycle clutch device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a clutch device for a motorcycle.
[0002]
[Prior art]
Motorcycles have a clutch device for transmitting the power of an engine to driving wheels. Generally, a clutch device transmits the power of a crankshaft to a transmission mechanism using friction, and a commercially available vehicle often uses a wet multi-plate clutch that cools a plurality of friction plates with oil. Each part of the clutch device is lubricated with the cooling oil.
[0003]
Oil can be supplied by using an oil pump to pump oil to each part of the clutch device, or by storing oil at the bottom of an engine case such as a crankcase or a transmission case, and supplying the oil to the outer periphery of the clutch housing of the clutch device. There is one that lifts and sends oil to each part of the clutch device.
[0004]
[Problems to be solved by the invention]
However, in the case of the method in which the oil is scraped off at the outer periphery of the clutch housing of the clutch device, the clutch housing rotates at a high speed. May not be supplied. As a result, the friction plate may not be sufficiently cooled, and the function may not be sufficiently exhibited.
[0005]
In addition, as shown in Japanese Utility Model Laid-Open No. 3-130921, for example, there is a clutch inner which has a lightening hole formed in the body of the clutch inner to facilitate the introduction of oil into the clutch device, but in this case, the rigidity of the clutch inner decreases. However, there is a risk that the durability of the clutch may be reduced, or a problem such as a failure of clutch disconnection due to deformation may occur.
[0006]
SUMMARY OF THE INVENTION The present invention has been made in view of the above-described circumstances, and has as its object to provide a clutch device for a motorcycle that improves oil supply performance to a friction plate.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, the motorcycle clutch device according to the present invention, as described in claim 1, stores oil at the bottom of an engine case and scrapes the oil at an outer peripheral portion of the clutch housing. In a clutch device using a supply method and intermittently connecting and disconnecting a friction plate by a pressure disk, an oil intake rib extending obliquely in a rotational direction with respect to a radial direction of the pressure disk is formed on an outer surface of the pressure disk. A plurality of holes in the pressure disk, and a plurality of holes for the oil intake in the circumferential direction closer to the radial center than the friction plate of the clutch. The oil intake rib is connected to the hole.
[0008]
Further, in order to solve the above problems, as described in claim 2, together with the above clutch device of the engine case an opening is formed at a portion opposed to, cover the opening in the clutch cover, the clutch An oil guide rib is formed on a portion of the inner surface of the cover facing the outer surface of the pressure disk, the portion being opposed to the rib and the oil intake hole from the outer periphery of the pressure disk .
[0009]
Furthermore, in order to solve the above-described problem, as described in claim 3, the clutch device has a coil spring that presses a friction plate through a pressure disk, and the coil spring is mounted on the pressure disk. A plurality of deep holes to be formed and a plurality of holes for taking in the oil are arranged side by side at equal intervals in the circumferential direction.
[0010]
Still further, in order to solve the above-described problem, as described in claim 4, the clutch device is configured such that a clutch on / off mechanism including a clutch release and a release arm and one end are connected to the clutch on / off mechanism. A push rod having an end connected to a push piece arranged at the center of the pressure disk is provided, and the oil intake hole is arranged radially outward of the push piece.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0012]
FIG. 1 is a longitudinal sectional view of an engine mounted on a motorcycle (not shown) to which the present invention is applied. As shown in FIG. 1, the outer shape of the engine 1 mainly includes a cylinder head 2, a cylinder block 3, and an engine case 4.
[0013]
A crankshaft 5 is horizontally arranged in the engine case 4, and a primary drive gear 6 is provided on the crankshaft 5. The rotational movement of the crankshaft 5, that is, the output of the engine 1 is transmitted to drive wheels (not shown) via a transmission mechanism 7.
[0014]
The transmission mechanism 7 includes a counter shaft 8 and a drive shaft 9 arranged in parallel with the crankshaft 5, and both shafts 8, 9 are operatively connected by respective transmission gear trains 10.
[0015]
FIG. 2 is an enlarged cross-sectional view of the transmission mechanism 7 along the line II-II in FIG. As shown in FIG. 2, a clutch device 11 is provided on the counter shaft 8. The clutch device 11 is, for example, a well-known wet multi-plate clutch, and includes a clutch assembly 12 provided on one side of the engine 1, for example, a right end of the counter shaft 8, and a clutch assembly 12 provided on the other side of the engine 1, for example, a left end of the counter shaft 8. It is roughly divided into a clutch connection / disconnection mechanism 13 provided.
[0016]
The clutch assembly 12 includes a clutch housing 16, a sleeve hub 17, a pressure disk 18, a push rod 19, a push piece 20, a coil spring 21, and the like, in addition to the drive plate 14 and the driven plate 15, which are friction plates. The clutch connecting / disconnecting mechanism 13 includes a clutch release 22 and a release arm 23, which will be described later.
[0017]
The counter shaft 8 has a hollow cylindrical shape, and a push rod 19 is disposed inside the counter shaft 8 so as to be able to advance and retreat in the axial direction. One end of a push piece 20 is attached to the opening of the counter shaft 8 at the end of the clutch assembly 12 side so as to be able to advance and retreat in the axial direction.
[0018]
The clutch housing 16 has a bottomed cylindrical shape, and a primary driven gear 24 is fixed to the bottom (left side in FIG. 2). The clutch housing 16 is rotatably supported on the countershaft 8 together with the primary driven gear 24, and the primary driven gear 24 is operatively connected to the primary drive gear 6 on the crankshaft 5. The outer peripheral edges of the plurality of drive plates 14 are fitted on the inner surface of the peripheral wall of the clutch housing 16, and the drive plate 14 rotates integrally with the clutch housing 16.
[0019]
On the other hand, the sleeve hub 17 is also a bottomed cylindrical member similar to the clutch housing 16, and the center of the bottom is spline-fitted to the counter shaft 8 so as to be slidable in the axial direction. The inner peripheral edges of the plurality of driven plates 15 are spline-fitted, and the driven plates 15 rotate integrally with the sleeve hub 17.
[0020]
The drive plate 14 and the driven plate 15 are arranged so as to alternately overlap with each other, and the driven plate 15 is constantly pressed against the drive plate 14 via the pressure disk 18 by, for example, the force of the coil spring 21. One end of a push rod 19 is connected to the pressure disk 18 via a push piece 20.
[0021]
By the way, the clutch device 11 uses an oil supply method in which oil is stored at the bottom of the engine case 4 and the oil is scraped up at the outer peripheral portion of the clutch housing 16.
[0022]
On the other hand, a clutch release 22 of the clutch connecting / disconnecting mechanism 13 is arranged at the other end of the push rod 19, and the pressure disk 18 and the clutch release 22 are operatively connected by the push rod 19.
[0023]
A release arm 23 is provided on the clutch release 22, and a clutch lever is connected to the release arm 23 via a clutch cable (both not shown). Further, the clutch cable is pulled by gripping the clutch lever, and the clutch release 22 rotates via the release arm 23. The clutch release 22 rotates to move the push rod 19 rightward in the drawing. Further, by moving the push rod 19 rightward in the figure, the pressure disk 18 moves rightward in the figure against the coil spring 21 and separates the drive plate 14 from the driven plate 15.
[0024]
FIG. 3 is a right side view of the pressure disk 18. FIG. 4 is a left side view of the pressure disk 18. FIG. 5 is a sectional view of the pressure disk 18 along the line VV in FIG.
[0025]
As shown in FIGS. 2 to 5, a plurality of deep holes 25 for mounting the coil spring 21 mounted between the pressure disk 18 and the sleeve hub 17 are formed at equal intervals in the circumferential direction. A plurality of oil intake holes 26 are formed between the deep holes 25 at equal intervals in the circumferential direction.
[0026]
On the other hand, a plurality of oil intake ribs 27 extending at an angle in the circumferential direction are formed on the outer side of the pressure disk 18 and on the right side surface in FIGS. 2 and 5 so as to extend in the rotation direction with respect to the radial direction of the pressure disk 18. Is done. Then, these oil intake ribs 27 and oil intake holes 26 are connected.
[0027]
By the way, a portion of the engine case 4 facing the clutch assembly 12 is opened, and this opening is covered by the clutch cover 28.
[0028]
FIG. 6 is a front view of the clutch cover 28. As shown in FIGS. 2 and 6, an oil guide rib 29 is formed on a portion of the inner surface of the clutch cover 28 facing the oil intake hole 26.
[0029]
Next, the operation of the present embodiment will be described.
[0030]
By forming oil intake holes 26 in the pressure disk 18 and connecting oil intake ribs 27 formed on the outer surface of the pressure disk 18 to these holes, the outer peripheral portion of the clutch housing 16 is scraped. The generated oil is guided toward the center of the clutch assembly 12 against the centrifugal force of the clutch housing 16, and is guided into the clutch device 11 through the oil intake hole 26. The oil guided to the inside of the clutch device 11 is guided to the drive plate 14 and the driven plate 15 which are friction plates by centrifugal force, and lubricates and cools these. As a result, seizure or the like is prevented, the efficiency of the clutch device 11 is improved, and the life is prolonged.
[0031]
Further, since the oil scraped up by the outer peripheral portion of the clutch housing 16 also adheres to the inner surface of the clutch cover 28, an oil guide rib 29 is provided on the inner surface of the clutch cover 28 at a position facing the oil intake hole 26. With this arrangement, more oil can be reliably guided to the oil intake hole 26.
[0032]
【The invention's effect】
As described above, according to the clutch device for a motorcycle according to the present invention, the oil is stored at the bottom of the engine case, and the oil is supplied from the outer periphery of the clutch housing. In a clutch device for intermittently connecting and disconnecting a plate, a plurality of oil intake ribs are formed on an outer surface of the pressure disk in a circumferential direction extending in a rotation direction with respect to a radial direction of the pressure disk. A hole for oil intake is formed in the disc, and a plurality of the holes for oil intake are arranged in the circumferential direction closer to the radial center than the friction plate of the clutch. Due to the connection, the oil is efficiently guided into the clutch device, and the friction plate is efficiently lubricated and cooled.
[0033]
In addition, an opening is formed in a portion of the engine case facing the clutch device, and the opening is covered with a clutch cover, and an inner surface of the clutch cover facing the outer surface of the pressure disk from the outer periphery of the pressure disk. Since the oil guide rib is formed at a position facing the rib and the oil intake hole , more oil can be reliably guided to the oil intake hole.
[0034]
Further, the clutch device has a coil spring that presses the friction plate through a pressure disk, and a deep hole for mounting the coil spring on the pressure disk and an oil intake hole are equally spaced in a circumferential direction. The oil taken into the clutch is guided to the inside of the clutch device along the surface of the deep hole.
[0035]
Furthermore, the above-mentioned clutch device has a clutch connecting / disconnecting mechanism constituted by a clutch release, a release arm and the like, and a push rod having one end connected to the clutch connecting / disconnecting mechanism and the other end connected to a push piece arranged at the center of the pressure disk. Since the oil intake hole is arranged radially outward from the push piece, the transport distance from the oil level of the stored oil to the oil intake hole is shortened, and the oil intake hole is provided. The length of the rib can also be shortened.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a motorcycle engine showing one embodiment of a motorcycle clutch device according to the present invention.
FIG. 2 is an enlarged sectional view of the transmission mechanism taken along the line II-II of FIG.
FIG. 3 is a right side view of the pressure disk.
FIG. 4 is a left side view of the pressure disk.
FIG. 5 is a sectional view of the pressure disk taken along line VV in FIG. 3;
FIG. 6 is a front view of the clutch cover.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Engine 4 Engine case 11 Clutch device 12 Clutch assembly 14 Drive plate (friction plate)
15 Driven plate (friction plate)
16 Clutch housing 18 Pressure disk 26 Oil intake hole 27 Oil intake rib 28 Clutch cover 29 Oil guide rib

Claims (4)

In a clutch device in which oil is stored at the bottom of the engine case and the oil is scraped up at the outer peripheral portion of the clutch housing, and a friction plate is connected and disconnected by a pressure disk, the radial surface of the pressure disk is formed on the outer surface of the pressure disk. A plurality of oil intake ribs extending in the circumferential direction are formed in the circumferential direction, and a plurality of oil intake holes are formed in the pressure disk . A clutch device for motorcycles and three-wheeled vehicles , wherein a plurality of the ribs for taking in the oil are connected to the holes while a plurality of the ribs are arranged in a circumferential direction closer to a radial center than a friction plate of the clutch. An opening is formed in a portion of the engine case facing the clutch device, the opening is covered with a clutch cover, and the ribs are formed on the inner surface of the clutch cover facing the outer surface of the pressure disk from the outer periphery of the pressure disk. The clutch device for a motorcycle according to claim 1, wherein an oil guide rib is formed at a portion facing the oil intake hole . The clutch device has a coil spring that presses the friction plate through a pressure disk, and has a plurality of deep holes for mounting the coil spring on the pressure disk and holes for taking in the oil at equal intervals in the circumferential direction. The clutch device for a motorcycle according to claim 1 or 2, wherein the clutch device is arranged in parallel. The clutch device includes a clutch release mechanism, a clutch on / off mechanism including a release arm, and a push rod having one end connected to the clutch on / off mechanism and the other end connected to a push piece disposed at the center of the pressure disk. The clutch device for a motorcycle according to any one of claims 1 to 3, wherein the oil intake hole is disposed radially outward of the push piece.

Images