JPS6132195Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention particularly relates to a lubrication structure for a chain for driving a generator of an engine in a motorcycle.

In multi-cylinder engines for motorcycles, a charging alternator (hereinafter simply referred to as a generator) is placed on a shaft separate from the crankshaft, and is driven by a chain to make the overall width of the engine narrow. , the bank angle is generous when driving around curves, and the space for the feet is secured.

In this type of engine, the chain for driving the generator usually has an injection nozzle located at an appropriate location between the generator shaft and the crankshaft, and lubricant is injected from inside the chain to supply the chain. There is.

However, such a lubrication system has drawbacks such as the inconvenience of lubricating oil scattering and a complicated structure.

The present invention has been made to eliminate the above-mentioned conventional drawbacks, and is applied to an engine in which the generator 10 is disposed on a separate shaft from the crankshaft, and the rotation of the crankshaft is transmitted to the generator shaft 12 via the chain 3. , an oil-tight chamber 24 is formed between the end 12a of the generator shaft 12 and the case 11, and a bearing 14 is disposed on the end 12a side of the generator shaft 12 facing the oil-tight chamber 24; The end 12a of the generator shaft 12 is rotatably supported via the bearing 14, and a chain sprocket 20 disposed on the generator 10 side is fitted onto the generator shaft 12. Oil passage 12b, 1 communicating with
2d and 12c are formed through the axis of the generator shaft 12, and a collar 17 is disposed on the generator shaft 12, which abuts the bearing 14 on the side opposite to the oil-tight chamber 24. A one-way clutch device 16 is provided to cut off the input to the engine starting motor 30, and an end face of the collar 17 is bored on the generator shaft 12 to restrict the outflow of lubricating oil from the bearing 14. The present invention provides a lubrication structure for a chain for driving a generator of an engine, which ensures a required amount of lubricating oil supplied to the oil passage.

An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

In the figure, a generator 10 and a starting motor 30 are arranged facing each other on the upper part of a crankcase 1, and a generator shaft 12 and a crankshaft (not shown) are connected via a chain 3. It's summery. The shaft 12 of the generator 10 is supported by the case 11 by radial ball bearings 13 and 14, and the case 31 of the starter motor 30 is supported by the bolt 3.
8 is fixed to the crankcase 1,
Further, the bearing end portion 32 of the case 31 is connected to the case 11.
It is fitted into a hole 11a bored parallel to the generator shaft 12. In this way, the starting motor 30 is disposed facing the generator 10, and the starting motor 30 is
0 axis 33 is positioned. Starting motor 3
A gear 34 is carved on the peripheral surface of the tip of the zero shaft 33, and the gear 34 meshes with a large gear 41 of an idle gear 40. This idle gear 40
is equipped with a small gear 42 in addition to the large gear 41. The idle gear 40 is rotatably supported in the case 11 via a pin 43 on a shaft 44 whose rotation is prevented. One end of the shaft 44 is fitted into a bottomed hole bored in the inner surface of the case 11, and the other end is inserted into a through hole bored in the case 11 via an O-ring.

A driven member 16a of a one-way clutch 16 is integrally engaged with the generator shaft 12 by spline connection. Drive member 1 of one-way clutch 16
6b is supported via a needle bearing 18 fitted to the outer peripheral surface of a collar 17 fitted to the shaft 12, and is engaged with the driven member 16a by an engaging portion 16c fixed to the driven member 16a. There is. A gear 19 is engraved on the outer peripheral surface of the drive member 16b, and the gear 19 meshes with a small gear 42 of an idle gear 40. Further, a sprocket 20 is formed on the side of the driven member 16a of the clutch, and this sprocket 20 and a sprocket fitted to a crankshaft (not shown) are connected to each other.
They are engaged by a chain 3 indicated by a dotted chain line.

A cover body 23 is fitted through an O-ring 22 into a hole 11b of the case 11 that is bored opposite to the end face 12a of the generator shaft 12, and there is a gap between the shaft end face 12a and the cover body 23. An oil-tight chamber 24 is formed. A bottomed passage 12b is bored from the end face 12a at the axial center position of the generator shaft 12, and the passage 12b has a plurality of through holes 12c bored in the radial direction.
The spline joint with the sprocket is opened through the spline joint. Further, a hole 20a is bored in the bottom of the sprocket 20 at a position opposite to the hole 12c. The passage 12b of the shaft 12 is a hole 12c.
and is opened at the bottom of the sprocket 20 via the hole 20a. Furthermore, a hole 12d is bored in the passage 12b at a position corresponding to the approximate center of the collar 17, and a hole 17a is bored in the collar 17, facing the hole 12d.

A hole 25 communicating with the oil-tight chamber 24 is formed in the case 11, and a collar 50 having a passage 50a is inserted into the hole 25, and a bolt 51 having a passage 51a is inserted into the hole 25.
The passage 5 of the collar 50
0a is connected via a pipe 52 to a hydraulic pump of a lubricating device (not shown). The bearing 1
4 is disposed on the end 12a of the generator shaft 12 facing the oil-tight chamber 24, and rotatably supports the end 12a. A radial flange 17b is formed at the end of the collar 17 on the side of the starting motor 30, and the end surface of the flange 17a is connected to the oil-tight chamber 24 of the bearing 14.
It touches the side. Flange 17 of collar 17
b, whose height is from the oil-tight chamber 24 to the bearing 14
It is set so as to limit the outflow of the lubricating oil supplied into the case 11 to an appropriate amount, and is brought into contact with the facing surface of the bearing 14 with an appropriate pressing force.

In this configuration, when starting the engine, when the starting motor 30 is driven, the motor 3
The rotation of the zero shaft 33 is transmitted from the gear 34 to the large gear 41 of the idle gear 40, and then to the small gear 42.
is transmitted to the gear 19 of the drive member 16b of the one-way clutch 16. Further, the rotation of the driving member 16b is transmitted to the driven member 16a via the engaging portion 16c, rotates the sprocket 20, and rotates the chain 3.
A crankshaft (not shown) is driven through this. In this way, when the engine is started, the rotation of the crankshaft is in turn transmitted to the generator shaft 12 via the chain 3, causing the shaft 12 to rotate. At this time, the driven member 1 of the one-way clutch 16
6a and the drive member 16b are disengaged, and the shaft 33 of the starting motor 30 is not rotated.

On the other hand, lubricating oil is supplied from a hydraulic pump of a lubricating device (not shown) to a pipe 52 and a passage 50 of a collar 50.
a, is supplied to the oil-tight chamber 24 through the passage 51a of the bolt 51 and the hole 25 of the case 11, and further reaches the bottom of the tooth of the sprocket 20 through the passage 12b and passage 12c of the generator shaft 12 and the passage 20a of the sprocket 20; It is supplied to the chain 3 from inside the chain 3. Furthermore, the lubricating oil in the oil-tight chamber 24 is also supplied to the bearing 14. Furthermore, the lubricating oil supplied to the passage 12b of the generator shaft 12 is also supplied to the bearing 18 via the passage 12d and the passage 17a of the collar 17, and further passes through the bearing 18 to the gear 34 of the starting motor 30 and the idler gear 40. , small gears 41, 42, gear 19 of one-way clutch 16, etc. The lubricating oil supplied to each part in this way is transferred to the case 11.
The oil is collected in the crankcase 1 through a cover (not shown) of the chain 3, etc., and is repeatedly supplied in circulation by the lubricating device.

As explained above, according to the present invention, a lubricating oil passage is formed using the generator case and the generator shaft, thereby allowing lubricating oil from the hydraulic pump of the lubricating device to flow from the bottom of the teeth of the sprocket to the chain. There is no need to install special lubricant pipes or injection nozzles inside the case to supply lubricating oil, which simplifies the lubrication structure and reduces weight.
This has the excellent effect of reducing costs and significantly improving the efficiency of supplying lubricating oil to the chain. Furthermore, the lubricating oil supplied from the oil-tight chamber 24 to the bearing 14
The amount of lubricating oil that flows out from the bearing 14 into the case 11 is restricted by the end surface of the collar 17 that comes into contact with the bearing 14, and as a result, the amount of lubricating oil supplied to the oil passage 12b in the generator shaft 12 is ensured at the required value. be able to.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view showing an embodiment of the lubrication structure of the engine generator drive chain according to the present invention. 1...Crankcase, 3...Chain, 10
... Generator, 11 ... Case, 12 ... Generator shaft, 16 ... One-way clutch, 20 ... Sprocket, 25 ... Lid, 30 ... Starting motor, 40
...Idle gear.

Claims (1)

[Scope of utility model registration request] The generator 10 is disposed on a separate shaft from the crankshaft, and the rotation of the crankshaft is transmitted to the generator shaft 1 via the chain 3.
2, the generator shaft 1
An oil-tight chamber 2 is provided between the end side 12a of 2 and the case 11.
4, and a bearing 1 facing the oil-tight chamber 24 on the end 12a side of the generator shaft 12.
4, rotatably supports the end 12a of the generator shaft 12 via the bearing 14, and a chain sprocket 20 disposed on the generator 10 side is fitted to the generator shaft 12. Oil passages 12b, 12d, 12c communicating with the bottom of the teeth of the sprocket 20
is formed through the axis of the generator shaft 12, and a collar 17 is disposed on the generator shaft 12, which abuts the bearing 14 on the side opposite to the oil-tight chamber 24. motor 3
A one-way clutch device 16 is provided to cut off the input to the generator shaft 12, and the end face of the collar 17 restricts the outflow of lubricating oil from the bearing 14 to the oil passage bored in the generator shaft 12. A lubrication structure for a chain for driving a generator of an engine, characterized in that the amount of lubricating oil supplied is ensured at a required value.