JPH02298618A - Oil filter attaching structure for internal combustion engine - Google Patents

Abstract

PURPOSE:To simply and surely carry out the attachment of an oil filter and to enhance the sealing ability by attaching the oil filter and an adapter therefor to a crank casing through the intermediary of one attaching member piercing through the center parts of them. CONSTITUTION:When a oil pump 5 is driven by rotation of a crank shaft 1a, oil in an oil pan is filtered by an oil filter 9, and thereafter, is fed to several parts in an engine 1 for lubrication. In this case, the oil filter 9 is attached by an attaching member 13 which pierces through a through-hole 10 in a filter casing 9a and through-holes 12a, 12b in both end plates 11a, 11b of a filter body 9b. The attaching member 13 also pierces through a boss 14c of an adapter 14, and has its male thread 13c which is screwed into a thread hole 15 in a lower crank casing 3b. With this arrangement, with the use of one common attaching member 3, the oil filter 9 and the adapter may be attached to the outer surface of the lower crank casing 3b.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an internal combustion engine oil filter mounting structure for mounting the internal combustion engine oil filter on the outer surface of a crankcase.

(Prior Art) Conventionally, an oil filter mounting structure for an internal combustion engine in which an oil filter is attached to the crankcase of the internal combustion engine via an adapter is known, for example, from Utility Model Application Publication No. 55-67303''i.
It is publicly known in 'f publication etc.

(Problem to be Solved by the Invention) In such a conventional oil filter mounting structure, the oil filter and the adapter are mounted to the crankcase by separate mounting members such as bolts. However, there was a problem in that a large number of mounting members were required.

The present invention has been made in view of the above-mentioned circumstances (1).It is an object of the present invention to provide an oil filter mount 44 structure for an internal combustion engine that requires fewer components for attaching an oil filter and an adapter to a crankcase. [It is considered as 1 target.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an oil filter mounting structure for an internal combustion engine in which an oil filter is mounted to the crankcase of the internal combustion engine via an adapter. oil filter and 111j
The above-mentioned adapter is attached by one rod-shaped member (=1 member) passing through the center of the adapter.

(Function) The oil filter and adapter are attached to the crankcase by a single rod-like member inserted through their centers, so fewer mounting members are required.

(1 actual blood case) An embodiment of the present invention will be described below based on the accompanying drawings.

The figure is a longitudinal cross-sectional view of an internal combustion engine equipped with the oil filter mounting structure of the present invention. consists of an upper crankcase 3a and a lower crankcase 3b, and an oil pan 4 is attached to the lower part of the upper crankcase 3b. An oil pump 5 is provided above the oil pan 4. The suction port 5a of the oil pump 5 is communicated with the oil pan 4 through the strainer 6. The discharge port 5b of the oil pump 5 is communicated with the oil inflow 1 of the oil filter 9 through the communication pipe 7 and the oil inflow path 8a, and the oil outflow 1-1 of the oil filter 9 is connected to the oil outflow path 8b. It is communicated with each lubricating part and a broken oil supply part such as a hydraulic tappet via.

The oil filter 9 consists of a filter case 9a and a filter element 91) housed within the filter case Oa. The filter case Oa shown in O;j has a bottomed cylindrical shape with one opening (%j on the right in the figure) opening 1-1, and an insertion hole IQ is bored in the center of the bottom wall. Further, the filter main body 91) has a cylindrical shape, and end plates 11a and Ilb are attached to both ends thereof, and each of these end plates 11a
, llb are provided with fitting holes 12a, 121> in the center. Then, from the outer surface side of the bottom wall of the filter case 9a, the fitting hole 10 in the center and both end plates IIξx, l
By pushing the rod-shaped receiving member I3 into the insertion holes 12a and 12b at the center of the filter case 9a,
Filter elements 9b are mounted concentrically therein.

The mounting member 13 has a collar 13a and a hexagonal head 13b at one end.
It consists of a hollow bolt with a female thread +3c provided on the outer peripheral surface of the other end. The collar 13a then comes into contact with the outer surface of the bottom wall of the filter case 9a.

The oil filter 9 is connected to n;j via an adapter 14.
It is attached to the outer surface of the lower crankcase 3b by a mounting member 1111. The adapter 14
When a circumferential side wall 14b is protruded from the outer periphery of the disc-shaped main body 14a, a cylindrical boss 14c is protruded from the center of the main body 14 Fl. Then, the mounting member 13 is pushed through the boss 14c of the adapter 14, and the mounting member 1
By screwing the male screw 13c of No. 3 into the screw hole 15 of the lower crankcase 3b, the oil filter 9 and the adapter 14 can be attached to the outside of the lower crankcase 3b by the common mounting member 13. One ball is placed on the side. Seal rings 16 are interposed between one end surface of the peripheral wall 1/lb of the adapter 14 and the filter case 9a, and between the trailing end surface of the peripheral wall 14b of the adapter 14 and the lower crankcase 3b. has been done.

0:j An oil regulator 17 is provided in the oil pan 4. The oil regulator 17 is clamped and fixed between the lower crankcase 3b and a seat 18, which is a protrusion projecting upward from the outer periphery of the second surface of the bottom wall of the oil pan 4. 11: The rotating shaft of the oil pump 5 is connected to the crankshaft Ia of the engine 1 via a power transmission mechanism (not shown), and the oil pump 5 is driven using the engine 1 as a power source. Ru.

A nozzle 21 is attached to the tip of an oil passage 20 that branches directly from the discharge side of the oil pump 5, and mission gears 24 and 25 are attached to the main shaft 22 and the counter shaft 23, respectively, from this nozzle 21.
These are cooled down by injecting oil into them. A shelf portion 26 is formed in the lower crankcase 3) below the mission gears 24 and 25,
Oil is temporarily stored in this shelf portion 26 while the vehicle is in operation to promote lubrication of the change drum 27 and the like. While the axle is stopped, oil flows back into the oil pan 4 through the gap 28 at the tip of the shelf 26. Note that a drain plug 29 is provided at the bottom of the oil pan 4 for draining water. It is being

Further, the interior of the mounting member 13 is an oil flow passage +3d, and a bypass valve 30 is disposed within this oil flow passage 13d.

In the above configuration, when the oil pump 5 is driven as the crankshaft 1a rotates, the oil in the oil pan 4 flows through the strainer 6 to the suction port 5a of the oil pump 5.
It is inhaled and discharged into the communication pipe 7 from the discharge [:I 5 b. The oil discharged into the communication f7 enters the oil filter 9 from the oil inlet passage 8a, passes through the filter element 9b, filters and swirls foreign matter, flows out to the oil outlet passage 8b, and then flows into the oil passage 32. It is guided and branched, and one side is supplied to the crankshaft 1a and a cylinder or cylinder (not shown) to lubricate these.
The capacity is supplied to the bearings, cams, valves, etc. of the camshafts 33 and 34 on the intake and exhaust sides, and lubricates them. In an engine employing a 7111-pressure tappet, hydraulic oil is supplied to the -11-pressure tappet.

On the other hand, the oil passage 20 is directly connected to the discharge side of the oil pump 5.
The oil introduced is injected from the nozzle 21 and lubricates the mission gears 24 and 25. The oil accumulated on the shelf 26 at the bottom of the mission gears 24 and 25 is used to promote the change drums 27 and 11, and when the vehicle is stopped, this oil is returned to the oil pan 4 from the gap 35. Ru.

If a lot of foreign matter is captured in the oil filter and the oil pressure on the inflow side increases, the bypass valve:
0 is activated, the oil is bypassed from the oil flow passage 13d in the intake member 13 to the oil outflow passage 8b without passing through the filter element 9b, thereby preventing interruption of lubrication.

When the rotation of the engine 1 increases, the discharge pressure of the oil pump 5 increases, and the oil discharge pressure reaches a predetermined value or more,
When the oil regulator 17 opens, a portion of the oil discharged from the oil pump 5 is transferred to the oil pan 4.
flow inside. As a result, the discharge pressure of the oil pump 5,
That is, the oil pressure in the lubrication system is adjusted to a predetermined value. In this way, when the discharge pressure of the oil pump 5 returns to a predetermined value, the oil regulator 17 closes, thereby stopping the oil from flowing into the oil pan 4.

(Effects of the Invention) As described above, the oil filter mounting structure for an internal combustion engine of the present invention is characterized in that the oil filter and the adapter are mounted to the crankcase by a single rod-shaped mounting member that is inserted through the center of the oil filter and the adapter. It is something to do.

Therefore, only one mounting member is required for mounting the oil filter and the adapter to the crankcase, so the number of mounting members can be reduced. In addition, since the mounting member is pushed through the centers of the oil filter and the adapter, force is applied evenly between the outer periphery of the adapter and the oil filter, and between the outer periphery of the adapter and the crankcase, thus stabilizing the mounting condition. At the same time, when a seal ring is inserted, the sealing performance is also ensured.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view of an internal combustion engine equipped with an oil filter mounting structure of the present invention, showing one embodiment of the present invention. ■... Internal combustion engine, 3... Crank case, 9...
Oil filter, 13... Mounting member, 14... Adapter applicant Honguchi 1 Giken Kogyo Co., Ltd. Agent Patent attorney Toshihiko Watanabe Patent attorney Osamu Mizuuchi

Claims (1)

[Claims] 1. In an oil filter mounting structure for an internal combustion engine in which an oil filter is attached to the crankcase of an internal combustion engine via an adapter, the oil filter and the adapter are attached to the crankcase with a single rod-shaped rod that passes through the center of the oil filter and the adapter. An oil filter mounting structure for an internal combustion engine, characterized in that it is mounted using a mounting member.