JPS6140408A - Centrifugal oil filter - Google Patents

Abstract

PURPOSE:To improve the filtrating performance of a centrifugal oil filter which has a simpler construction by having a closed chamber made up of a back plate, separating an oil passage from other elements by use of a partition wall and communicating the resultant oil passages, which are on both sides of said wall, with the closed chamber. CONSTITUTION:A fixed face 8 which is stuck to a drive shaft and a movable face 9 that can be slid in the axial direction are arranged opposedly to each other. A back plate 15 covers the rear part of a housing 11, whereby defining a closed chamber 18. An oil passage 2 which passes through the internal center of the drive shaft 1 is divided by a partition wall 21 which is mounted at a position corresponding to that of a ramp plate 12. The resultant oil passages 2 at both sides of said wall 21 are communicated with a closed chamber 18 which is formed in front of and at the rear of the ramp plate 12. A centrifugal oil filter which is of a simpler constitution may therefore be provided with higher filtrating performance.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a centrifugal oil filter for an engine equipped with a V-belt continuously variable transmission.

[Technical background of the invention and its problems]

A centrifugal oil filter has a casing that has a disc-shaped cavity integrated into a rotating shaft such as a crankshaft, so that the oil passing through the inner center of the rotating shaft passes through this cavity, and the oil rotates within the cavity. It uses centrifugal force to remove fine metal powder that sometimes gets mixed in. This type of centrifugal filter is more effective as the diameter of the cavity becomes larger, but generally, for example, a crankshaft is equipped with many other functional parts, so it is subject to strength and space constraints. Difficult to use.

[Purpose of the invention]

In view of the above points, the present invention aims to install a centrifugal filter without being subject to space constraints.
A centrifugal filter is constructed using a centrifugal drive V-pulley of a continuously variable belt transmission.

[Summary of the invention]

That is, the centrifugal oil filter of the present invention is constructed as follows.

A fixed face fixed to the drive shaft and a movable face that is slidable in the axial direction are arranged opposite each other, and a ramp plate is provided integrally with the drive shaft in a housing that extends behind the movable face. A drive for a V-belt continuously variable transmission that surrounds a centrifugal roller and uses the centrifugal force of the centrifugal roller to move the movable face closer to the fixed face. The rear of the housing is closed off by a rotary plate supported so as to be slidable in one direction to form a sealed chamber, and an oil passage passing through the inner center of the drive shaft is separated by a partition wall provided at the lamp plate position, and both sides of the oil passage are separated by a partition wall provided at the lamp plate position. The oil passages are communicated with the sealed chambers before and after the lamp plate, respectively.

With the above structure, the oil supplied to the oil passage inside the drive shaft passes through the closed chamber and returns to the oil passage, during which metal particles with high specific gravity are removed by centrifugal force. In other words, it functions as a centrifugal oil filter, and there is no need to separately install a centrifugal oil filter or other filters. In particular, the lamp plate prevents the oil from passing through a short circuit and acts to receive sufficient centrifugal force, resulting in high filtration performance.

[Embodiments of the invention]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a description will be given with reference to figures showing embodiments of a centrifugal oil filter of the present invention.

The reference numeral l designates the engine crankshaft, through which the oil passage 2 passes, an oil supply hole 3 that communicates with the bearing 4 and the valve mechanism, and a crank pin 5 that runs from the inside of the engine crankshaft.
The oil supply hole 7 and the like communicating with the large end 6 communicate with each other.

A drive V-pulley of a V-belt continuously variable transmission is mounted on the crankshaft 1. That is, the drive V pulley is composed of a fixed face 8 fixed to the crankshaft 1 and a movable face 9 that is slidable in the axial direction, and the V belt 10 is suspended between both faces 8 and 9. Movable face 9
Behind the housing 11, the outer peripheral portion extends rearward. There is a lamp plate 12 integrated with the crankshaft 1 on the inside rear side of the nose housing 11, and a movable face rear surface 1.
A centrifugal roller 14 is interposed between the lamp plate 12 and the lamp plate 12 . This movable face back 13 and lamp plate 1
The facing distance 20 is inclined so as to become narrower in the centrifugal direction, and is set so that the movable face 9 is pressed toward the fixed face 8 by the centrifugal force of the centrifugal roller 14. When the crankshaft speed increases by 10 revolutions, the drive V pulley becomes narrower, and the suspension diameter of the V belt 10 increases to reach a high speed range.

Next, an axially slidable knock plate 15 is pivotally supported on the crankshaft 1 behind the lamp plate 12, and its outer peripheral edge 15a and the rear end 11a of the housing 11 are tightly connected. Movable face 9 and back plate 15
and the crankshaft 1 are oil seals 16 and 17.
is interposed, and a sealed chamber 18 is formed within the housing 11. The oil passage 2 communicates with the front and back of the lamp plate 120 of the sealed chamber 18 through oil holes 19 and 20,
The two oil holes 19 and 20 are separated by a partition wall 21 provided at a position where the lamp plate 12 is supported. Further, oil is supplied to the oil passage 2 from an oil supply hole n provided in the case B facing one end of the crankshaft.

With the above configuration, the oil supplied to the oil passage 2 enters the sealed chamber 18 from the oil hole 19, and the lamp plate 1
2 and returns to the oil passage 2 again from the oil hole hole. Inside the sealed chamber 18, it rotates with the rotation of the movable face 9, and due to the generated centrifugal force, metal components with high specific gravity gather around the outer periphery, and clean oil is supplied to the oil supply holes 3 and 7 as described above. .

[Effects of the Invention] As described above, the centrifugal oil filter according to the present invention has a centrifugal filter chamber formed by using the housing of the centrifugal force generator provided behind the movable face of the drive V pulley of the V-belt automatic transmission. Therefore, a centrifugal oil filter with high furnace filtration performance can be obtained immediately with a simple structure just by adding a /guk plate. A centrifugal oil filter can be installed compactly and at low cost without increasing the load on drive shafts such as the crankshaft, and has the effect of improving the lubrication function of engines equipped with V-belt automatic transmissions.

[Brief explanation of the drawing]

The figure shows a V used in an engine transmission system showing an embodiment of this invention.
FIG. 3 is a longitudinal cross-sectional view of the belt automatic transmission drive V-pulley. 1...Crankshaft, 2...Oil passage, 3,7...
・Oil supply hole, 8...Fixed face, 9...Movable face, 10...V belt, 11...Housing/, 12...Ramp plate, 14...Centrifugal roller, 15 ... Pack seat, 18 ... Sealed room, 19
．． 20... Oil hole, 21... Partition wall.

Claims (1)

[Claims] A fixed face fixed to the drive shaft and a movable face that can freely slide in the axial direction are installed opposite each other, and a ramp plate is installed integrally with the drive shaft in a housing that extends behind the movable face. The centrifugal force of the centrifugal rollers acts to move the movable face closer to the fixed face, and the drive V of a belt continuously variable transmission.
In the pulley, a back plate axially slidably supported by the drive shaft behind the lamp plate closes the rear of the housing to form a sealed chamber, and an oil passage passing through the inner center of the drive shaft is connected to the lamp plate. A centrifugal oil filter characterized in that the oil filter is separated by a partition wall provided at a certain position, and the oil passages on both sides thereof are communicated with the sealed chambers before and after the lamp plate.