JPS6010652Y2 - oil filter - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of an oil filter used in a four-stroke engine or the like.

Generally, four-stroke engines are equipped with an oil filter that filters lubricating oil for the engine.

In the oil filter, a shaft hole is provided in an end plate that covers both ends of a cylindrical filter element, a through bolt is passed through the shaft hole, and the oil filter is attached to an oil suction hole.

Through-bolts are equipped with one-way valves and have multiple horizontal holes for oil to pass through, making them complicated in structure and requiring deburring to process, making them time-consuming and expensive to manufacture.
Replacing the filter element is also troublesome.

This invention has been improved in view of these points, and an embodiment of the invention shown in the drawings will be described below.

An upper end plate 2 and a lower end plate 3 are fixed to the upper and lower ends of a cylindrical filter element 1.

A central hole is provided in the lower end plate 3, and a seal ring 4 is attached thereto.

An oil hole 5 is provided in the center of the upper end plate 2, and the oil hole 5 is connected to a spring 6.
It is closed with a one-way valve 7 that opens only inward against the pressure.

8 is a cup for mounting the spring 6, and 9 is an oil hole bored in the cup 8.

These are combined to form an oil filter unit.

The end of the suction port 11 provided in the case 10 is a protruding end 12 that protrudes upward in a stepped manner, and the seal ring 4 is fitted into the protruding end 12 for positioning.

The case lid 13 is fastened to the case 10 with bolts 14, and a presser spring 15 is elastically inserted between the case lid 13 and the upper end plate 2, so that the oil filter unit is supported by the presser spring 15.

Reference numeral 16 indicates an oil inflow hole provided in the case 10, 17 indicates a drain plug, and 18 indicates a plurality of ribs raised from the bottom peripheral edge of the case 10 on the side wall to hold the outside of the lower end plate 3.

The effect will be explained.

The lubricating oil passes through the filter element 1 from the oil inflow hole 16, is filtered, and flows into the suction port 11.

In the unlikely event that the filter element 1 becomes clogged, oil flows inward through the oil hole 5 by pushing open the one-way valve 7.

When replacing the filter element 1, remove the bolts 14 and remove the case cover 13.
can be exchanged.

The lower end of the filter element 1 is stabilized by the seal ring 4 fitting into the protruding end 12 of the suction port 11, and the upper end is pressed by the presser spring 15 to be held securely.

As explained above, this invention covers the upper and lower ends of a cylindrical filter element with an upper end plate and a lower end plate, attaches a seal ring to the center hole of the lower end plate, and fits the seal ring into the protruding end of the suction hole. A one-way valve that closes the oil hole is installed inside the center of the upper end plate, and a presser spring is inserted between the upper end plate and the case lid, and the filter element is supported by the presser spring, making it easy to install the filter element. can be replaced, and the replacement work is easy.

The one-way valve is attached to the upper end plate, and has a simple structure and is easy to manufacture.

In this way, the overall weight is light and inexpensive, and by simply holding it down with a presser spring, there is no chance of damage caused by over-tightening.

Furthermore, it has the effect of eliminating debris, which is a major problem for the lubrication system.

[Brief explanation of the drawing]

The figure is a longitudinal sectional view showing an embodiment of the present invention. 1... Filter element, 2... Upper end plate, 3... Lower end plate, 4... Seal ring, 5... Oil hole, 7...One-way valve, 1
1...Suction hole, 12...Protruding end, 13
...Case lid, 15...Press spring.

Claims (1)

[Scope of utility model registration request] The upper and lower ends of the cylindrical filter element are covered with an upper end plate and a lower end plate, a seal ring is attached to the center hole of the lower end plate, an oil hole is provided in the center of the upper end plate, and a one-way valve to close the oil hole is attached to the upper end plate. The oil filter unit is installed inside the case.The waist case is provided with an oil suction hole that protrudes upward from the center of the bottom, and a plurality of ribs that rise from the periphery of the bottom on the side wall, and the oil filter unit is inserted into the case. A presser spring is provided between the upper end plate of the lower oil filter unit and the case lid so that the seal ring is fitted into the protruding end of the oil suction hole of the case, and the lower end plate is positioned and held by the ribs. The oil filter is characterized in that the case lid is detachable with bolts, and the oil filter unit is supported by the presser spring.