JPS6120329Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a power transmission device that transmits rotation of an engine crankshaft to a driven shaft via a disk member.

In marine internal combustion engines, a rubber block joint or damper disk is interposed at the connection between the crankshaft and the clutch reversing reducer to avoid transmission of torque fluctuations and torsional vibrations between the engine and the reducer. That's what I do. In that case, the rubber block joint or damper disk and the crankshaft are usually spline engaged, and the only lubrication is from the grease applied during assembly; the grease flows out during operation, causing lubrication. As a result, the spline engagement portions suffer wear, rust, seizure, etc., and as the wear progresses, the spline teeth break and power transmission becomes impossible. It was hot.

The present invention addresses the above-mentioned problems, and includes a power transmission device that transmits the rotation of the crankshaft of an engine from a disk member connected to the crankshaft to a driven shaft spline-engaged with the inner circumference of the disk member. A grease chamber opening toward the shaft end is provided in the spline engagement portion of the driven shaft, and the outside of the opening of the grease chamber is covered with a cap attached to one end surface of the inner circumferential portion of the disk member to form the grease chamber. An annular seal member that communicates with the spline engagement portion and is fitted around the driven shaft between the other end surface of the inner circumference of the disk member and the cylindrical outer circumference of the driven shaft following the spline engagement portion. The power transmission device is characterized in that a grease supply hole is provided in the wall of the grease chamber to communicate the grease chamber and the spline engagement portion, and the purpose thereof is to control the rotation of the driven shaft. The centrifugal force caused by the centrifugal force allows the grease in the grease chamber to be sufficiently spread over the entire spline engagement portion, and wear, rust, seizure, etc. that occur in the spline engagement portion can be prevented for a long period of time. Another object of the present invention is to provide an improved power transmission device in which the grease supply section can be made smaller and lighter.

The present invention relates to a power transmission device that transmits the rotation of an engine crankshaft from a disc member connected to the crankshaft to a driven shaft splined to the inner circumference of the disc member, as described above. A grease chamber opening toward the shaft end is provided in the part, and the outside of the opening of the grease chamber is covered with a cap attached to one end surface of the inner peripheral part of the disk member, so that the grease chamber and the spline engagement part are connected to each other. are in communication with each other, and an annular sealing member fitted around the driven shaft seals between the other end surface of the inner circumferential portion of the disk member and the cylindrical outer circumferential surface of the driven shaft following the spline engagement portion, and the grease is sealed. Since a grease supply hole is provided in the chamber wall to communicate the grease chamber with the spline engagement part, the centrifugal force caused by the rotation of the driven shaft allows the grease in the grease chamber to be sufficiently spread over the entire spline engagement part. This caused wear and tear on the spline engagement part.
Rust, seizure, etc. can be prevented for a long period of time. Further, since the grease chamber for supplying grease to the spline engagement portion is provided in the driven shaft as described above, the grease supply portion can be made smaller and lighter.

Next, the power transmission device of the present invention will be explained with reference to an embodiment shown in FIG.
20 is a driving plate of the damper disk 19 fixed to the flywheel 17 with bolts, 20 is a driven plate (disc member) of the damper disk 19, 22
is spline engaged with the inner periphery of the driven plate 20 (symbol 2
24 is a clutch shaft that is spline engaged with the inner periphery of the clutch shaft joint 22 (see reference numeral 23), 25 is a gear that is spline engaged with the clutch shaft 24, and the clutch is A clutch case rotatably supports the shaft 24 and the clutch shaft joint 22, 27 is an oil seal interposed between the clutch case 26 and the clutch shaft joint 22, and 28 is the clutch shaft joint 22.
A blind plug 29 provided inside the clutch shaft joint 22
A retaining ring 30 that engages with the inner surface of the clutch shaft 24 to restrict leftward movement of the clutch shaft 24 passes through the clutch shaft 24 and opens into a spline engagement portion between the clutch shaft 24 and the gear 25. A clutch lubricating oil passage opens through a throttle 31 into the spline engagement portion 23 between the clutch shaft 24 and the clutch shaft joint 22, 32 is an O-ring that closes the other end of the spline engagement portion 23, and 33 is a thrust washer. ,
A cap 34 is attached to one end of the driven plate 20 and closes one end of the spline engagement portion 21 between the driven plate 20 and the clutch shaft joint 22, and 35 is in contact with the other end of the driven plate 20. O-ring, 36
is a sleeve slidably fitted onto the clutch shaft joint 22; 37 is a spring that presses the O-ring 35 against the driven plate 20 via the sleeve 36; and 38 is the spring on the left side of the blind plug 28. Grease supply hole provided in the clutch shaft joint 22,
Each of the above parts 20, 22, 34, 35, 36, 3
A grease chamber 39 communicating with the spline engagement portion 21 is formed by 8 .

The present invention provides a power transmission device that transmits the rotation of the crankshaft of an engine from the disk member 2 connected to the crankshaft to the driven shaft 22 spline-engaged with the inner circumference of the disk member 20, as described above. A grease chamber 39 that opens toward the shaft end is provided in the spline engagement portion 21 of the disk member 20 , and the outside of the opening of the grease chamber 39 is connected to the disk member 20 .
The grease chamber 39 is covered by a cap 34 attached to one end surface of the inner circumferential portion of the disc member 20 to communicate the spline engaging portion 21 with the other end surface of the inner circumferential portion of the disk member 20. The annular sealing members 35 and 36 fitted around the driven shaft 22 seal between the cylindrical outer circumferential surface of the driven shaft 22 that follows the driven shaft 22, and a grease supply hole 38 is provided in the wall of the grease chamber 39. Since the spline engaging portion 21 is in communication with the spline engaging portion 21, the centrifugal force caused by the rotation of the driven shaft 22 can sufficiently spread the grease in the grease chamber 39 over the entire spline engaging portion 21, thereby preventing the spline engaging portion from being engaged. Wear, rust, seizure, etc. that occur in the portion 21 can be prevented for a long period of time. Further, as described above, the grease chamber 39 for supplying grease to the spline engagement portion 21 is connected to the driven shaft 22.
Since it is provided inside, the grease supply hole can be made smaller and lighter.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional side view showing an embodiment of the power transmission device according to the present invention. 20... Disk member, 21... Spline engagement portion, 22... Driven shaft, 35, 36... Annular seal member, 38... Grease supply hole, 39... Grease chamber.

Claims (1)

[Scope of utility model registration request] In a power transmission device that transmits the rotation of the crankshaft of an engine from a disk member connected to the crankshaft to a driven shaft spline-engaged with the inner circumference of the disk member, a drive shaft is inserted into the spline engagement portion of the driven shaft toward the shaft end. A grease chamber that opens is provided, and the outside of the opening of the grease chamber is covered with a cap attached to one end surface of the inner peripheral portion of the disk member to communicate the grease chamber and the spline engagement portion of the disk member. An annular sealing member fitted around the driven shaft seals between the other end surface of the inner peripheral part of the shaft and the cylindrical outer peripheral surface of the driven shaft following the spline engagement part, and a grease supply hole is formed in the grease chamber wall. A power transmission device characterized in that the grease chamber and the spline engagement portion are provided in communication with each other.