JPS6231722Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a lubrication system for motorcycle transmissions, which collects oil from the clutch side, where there is a lot of oil splash, and passes it through the clutch release pusher and transmission shaft to the sliding surfaces of input gears, transmission gears, etc. The purpose is to supply a large amount of lubricating oil to the

Conventionally, a method has already been proposed in which an oil hole is provided in the axis of the countershaft and oil is forcibly supplied from the oil passage in the crankcase, which also serves as the transmission case, to forcibly lubricate the sliding surfaces between the shaft and gears. (For example, Utility Model No. 57-145862). However, in this case, it is necessary to construct a complicated oil passage inside the case, and an oil pump must also be installed, which increases the cost.

This invention focuses on the fact that the clutch has a larger diameter than the transmission gear, and that the lower end of the clutch is immersed in the oil in the clutch cover, causing a large amount of oil to jump up. This oil is collected and supplied to a power transmission shaft such as a countershaft through a clutch release pusher.

Figure 1 is a partial vertical cross-sectional view perpendicular to the direction of travel (parallel to the crankshaft) to show the clutch part of a motorcycle equipped with a horizontally mounted engine in which the crankshaft is perpendicular to the direction of travel (parallel to the crankshaft). The transmission shaft (transmission shaft) is supported by a crankcase partition wall 3 (mission case portion) via a bearing 2, and has an oil hole 4 in the shaft core. An input gear 5 and other transmission gears (not shown) are rotatably fitted onto the shaft 1 via a bush 6 on the inner periphery.
The oil holes 4 communicate through radial holes 7 . The input gear 5 is always engaged with a crankshaft gear (not shown). A housing 10 of a clutch 9 is connected to the input gear 5 via a rubber damper 8.
is attached, and the housing 10 is attached to the plate group 1
1 to a hub 12 and a wheel 13, and the hub 12 is fixed to the shaft 1. A plurality of columnar bosses 14 provided on the wheel 13 penetrate through holes in the hub 12 and protrude toward the clutch cover 15 side, and a clutch spring 17 is compressed between the hub 12 and an annular washer 16 fixed to the tip thereof. There is. The washer 16 is supported by an annular holder 18, and the holder 18 supports a cylindrical release pusher 20 via a bearing 19 on its inner periphery. (not shown) from the clutch cover 15 side. The pusher 20 has its left end firmly fitted into the reduced diameter end 4a of the oil hole 4, its right end loosely fitted into an oil receiver 22 consisting of a dummy hole provided on the inner surface of the clutch cover 15, and its right end surface fitted into the reduced diameter end 4a of the oil hole 4.
It faces the half-split cam 23 provided at 4. The small diameter portion 24a at the lower end of the release shaft 24 fits into a bearing hole 25 provided in the clutch cover 15, and the stepped portion 26
is connected to the clutch cover 15 via the thrust bearing 27.
The upper end protrudes upward through the bearing hole 28 of the clutch cover 15, and a lever 2 is attached to the upper end.
It has 9 integrally. The lever 29 is connected to a clutch lever (both not shown) of the handle via a wire.

The bottom of the clutch chamber 31 surrounded by the partition wall 3 and the clutch cover 15 is filled with oil to the extent that the lower end of the clutch 9 is immersed therein.

The clutch cover 15 is close to the outer peripheral surface of the clutch 9, and its upper inner surface 32 is inclined downward toward the oil receiver 22 as shown in FIG. As shown in FIG. 2, ribs 34 and 35 are integrally molded into a substantially V-shape that converges to the oil receiver 22, and the lower ends of the ribs 34 and 35 form a gutter-shaped oil receiver 22 surrounding the pusher 20. ing.

When the engine is started, its rotational force is transmitted to the input gear 5, and the housing 10 of the clutch 9 constantly rotates together with the input gear 5, splashing up oil at the bottom of the clutch chamber 31, and splashing oil onto the inner surfaces 32, 33 of the clutch cover 15. A large amount of oil adheres to the inner surface of the clutch cover, especially the upper half of the inner surface of the clutch cover, as shown by the arrow in FIG.
5 and gather at the oil receiver 22, and the oil receiver 2
The oil enters the oil hole 4 in the shaft 1 from 2 through the pusher 20, and from there it is supplied to the sliding surface between the input gear bush 6 and the shaft 1 and other sliding surfaces between the transmission gear and the shaft 1 through the hole 7. be done.
When the clutch 9 is in the connected state, the shaft 1 rotates together with the hub 12, so that the oil in the oil hole 4 is actively sent from the hole 7 to the sliding surface by the action of centrifugal force. When the clutch lever is operated to rotate the release shaft 24 and the bushing 20 is operated in the direction of arrow A by the action of the cam 23, the clutch 9 is disengaged and rotation of the shaft 1 gradually stops, but the clutch housing 1
Since the rotation of the clutch cover continues, the oil on the inner surface of the clutch cover continues to be collected in the oil receiver 22 and flows into the oil hole 4 through the busher 20.

As explained above, in the present invention, the clutch 9 is disposed at one end of the transmission shaft (counter shaft 1) having the oil hole 4 in the center, and the clutch cover 15 surrounding the clutch 9 is provided with an inner surface that is concentric with the transmission shaft. One end of the cylindrical pusher 20 for clutch release is connected to the oil receiver 22, and the other end is connected to the oil hole 4 of the transmission shaft, so that the oil adhering to the inner surface of the clutch cover 15 is transferred to the oil receiver 22. Leading rib 3
4 and 35, a large amount of oil scattered by the clutch 9, which has a larger diameter than the transmission gear group, and adhered to the inner surface of the clutch cover 15 is removed from the rib 3.
4 and 35, and can be supplied to the oil hole 4 in the shaft 1 through the release pusher 20, which has the advantage of actively supplying a large amount of lubricating oil to the sliding surfaces of the input gear 5 and the transmission gear.
Further, since the clutch housing 10 is a member that constantly rotates even when the clutch is disengaged, there is no fear that the amount of attached oil will be insufficient, and the lubrication effect is high. Furthermore, since there is no need to provide a separate oil pump or complicated oil passages, it is possible to significantly reduce costs.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view perpendicular to the traveling direction of a motorcycle to which the present invention is applied, and FIG. 2 is a partial view taken in the direction of the arrows in FIG. 1. 1... Counter shaft (an example of a transmission shaft), 4
...Oil hole, 9...Clutch, 15...Clutch cover, 20...Release pusher, 22...
...Oil receiver, 34, 35...rib.

Claims (1)

[Scope of utility model registration request] A clutch is disposed at one end of a transmission shaft having an oil hole in the center, an oil receiver is provided on the inner surface of a clutch cover surrounding the clutch and is coaxial with the transmission shaft, and one end of a cylindrical pusher for clutch release is used as an oil receiver. ,
A lubricating device for a motorcycle transmission, characterized in that the other end is connected to an oil hole of a transmission shaft, and a rib is provided on the inner surface of the clutch cover to guide oil adhering to an oil receiver.