JPH0558806U - Forced lubrication engine - Google Patents

Abstract

(57) [Summary] [Structure] From the front face 2 of the crankcase 1, a rearward facing drill hole 3/4 forming a part of the oil gallery is formed, and the front end opening 5/6 of the drill hole 3/4 is opened here. The gear case cover mounting plate 9 which is sealed by the blind plugs 7 and 8 which are fitted to the front surface of the crank case 1 and which is attached to the front surface 2 of the crank case 1 has a drill hole 3
In the forced lubrication type engine in which the front end openings 5 and 6 of No. 4 were covered, the following was done. The gear case cover mounting plate 9 is provided with oil escape holes 10 and 11 which overlap a part of the front end openings 5 and 6 of the drill holes 3 and 4, and the oil escape holes 10 and 11 are made to face the inside of the gear case cover 12. .. [Effect] When the blind plugs 7 and 8 loosen and the lubricating oil leaks from the front end openings 5 and 6 of the drill holes 3 and 4, the lubricating oil leaks from the oil escape holes 10 and 11 as shown by arrows 13 and 14. As described above, since the oil flows out into the gear case cover 12, the lubricating oil does not flow out to the outer peripheral side of the engine and the surroundings of the engine are not polluted.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a forced lubrication engine.

[0002]

[Prior art]

 Conventionally, there is a forced lubrication engine shown in FIG. This is because, as shown in FIG. 3 (A), rear facing drill holes 103 and 104 forming a part of the oil gallery are opened from the front surface 102 of the crankcase 101, and as shown in FIG. 3 (B), The front end openings 105 and 106 of the drill holes 103 and 104 are sealed with blind plugs 107 and 108 which are fitted in the drill holes 103 and 104, and the drill case 103 is attached to the front face 102 of the crankcase 101 by the gear case cover mounting plate 109. The front end openings 105 and 106 of 104 are covered.

With such a configuration, even when the blind plugs 103 and 108 try to come out from the front end openings 105 and 106 of the drill holes 103 and 104 by the pressure of the lubricating oil that is pumped through the oil gallery, The blind plugs 107 and 108 are received by the gear case cover mounting plate 109 and are not blown off in front of the crankcase 101.

[0004]

[Problems to be solved by the device]

 The above conventional technique has the following problems. That is, since the gear case cover mounting plate 109 that covers the front end openings 105 and 106 of the drill holes 103 and 104 is in close contact with the front surface 102 of the crankcase 101, the blind plugs 107 and 108 are loosened and the drill holes 103 and 104 of the drill holes 103 and 104 are removed. When the lubricating oil leaks out from the front end openings 105 and 106, the lubricating oil permeates into the mating surface between the front surface 102 of the crankcase 101 and the gear case cover mounting plate 109 due to the capillary phenomenon, and from there to the outer peripheral side of the engine. Spill out and pollute the area around the engine.

An object of the present invention is to provide a forced lubrication type engine capable of preventing the lubricating oil leaking from the front end opening of the drill hole from flowing out to the outer peripheral side of the engine.

[0006]

[Means for Solving the Problems]

 In the present invention, as illustrated in FIGS. 1 (A) to 1 (C), rearward facing drill holes 3 and 4 forming a part of an oil gallery are opened from the front surface 2 of the crankcase 1 and shown in FIG. 1 (C). As shown, the front end openings 5 and 6 of the drill holes 3 and 4 are sealed with blind plugs 7 and 8 which are fitted therein, and a gear case cover mounting plate 9 which is closely attached to the front surface 2 of the crank case 1 is used. The forced lubrication engine that covers the front end openings 5 and 6 of the drill holes 3 and 4 is characterized by the following.

That is, as illustrated in FIG. 1D, the gear case cover mounting plate 9 has an oil escape hole 10/11 which overlaps a part of the front end opening 5/6 of the drill hole 3/4. Is opened, and the oil escape holes 10 and 11 are made to face the inside of the gear case cover 12 shown in FIG. 1 (A).

[0008]

[Action]

 As shown in FIG. 1 (C), when the blind plugs 7.8 are loosened and the lubricating oil leaks from the front end openings 5.6 of the drill holes 3/4, the lubricating oil leaks through the drill holes 3/4. The front end 2 of the crankcase 1 and the gear case cover mounting plate will flow out from the oil escape hole 10/11 that overlaps a part of the front end opening 5/6 of the crankcase 1 as shown by the arrow 13-14. There is no room for lubricating oil to penetrate into the mating surface with 9.

[0009]

[Effect of the device]

 If the blind plug loosens and the lubricating oil leaks from the front end opening of the drill hole, this lubricating oil will flow into the gear case cover from the oil relief hole that overlaps the front end opening of the drill hole. There is no room for lubricating oil to penetrate into the mating surface between the front surface and the gear case cover mounting plate. Therefore, there is no outflow of lubricating oil from this mating surface to the outer peripheral side of the engine, and the surroundings of the engine are not contaminated.

[0010]

【Example】

 An embodiment of the present invention will be described with reference to the drawings. 1A and 1B are views for explaining a forced lubrication type engine according to an embodiment of the present invention. FIG. 1A is a side view of the engine, FIG. 1C is a vertical cross-sectional view of an enlarged view of a main part extracted from FIG. 1A, and FIG. 1D is a view taken in the direction of the arrow D in FIG. 1C. FIG. 2 is a front view of the gear case cover mounting plate used in the forced lubrication engine according to the embodiment of the present invention.

The configuration of the forced lubrication engine shown in FIG. 1 (A) is as follows. A cylinder portion 15 is provided on the upper side of the crank case 1, and an oil pan 16 is attached to the lower side of the crank case 1. A governor case 17 and a fuel injection pump case 18 are provided on the left side of the cylinder portion 15. An oil filter 19 is attached to the left side of the crankcase 1. A gear case cover mounting plate 9 is closely attached to the front surface 2 of the crank case 1. The gear case cover mounting plate 9 is composed of a thin flat plate.

As shown in FIG. 2, a large number of bolt holes 20 are provided in the peripheral portion of the gear case cover mounting plate 9, and the gear case cover 12 shown in FIG. It is supposed to be attached. A timing transmission gear device (not shown) is accommodated in the gear case cover 12. The two holes formed in the central portion of the gear case cover mounting plate 9 in FIG. 2 are oil escape holes 10 and 11, which will be described later.

As shown in FIG. 1 (B), the left lateral wall 21 of the crankcase 1 is provided with two upper and lower drill holes 3 and 4 which form a part of an oil gallery in the wall portion thereof. . As shown in FIG. 1 (A), these two drill holes 3 and 4 are opened rearward from the front surface 2 of the crankcase 1. The lower drill hole 4 is a lubricating oil inflow passage from the oil pan 16 side to the oil filter 19. The upper drill hole 3 is a lubricating oil outflow passage from the oil filter 19 to various sliding parts such as the crankshaft bearing. As shown in FIG. 1 (C), the front end openings 5 and 6 of the drill holes 3 and 4 are sealed by blind plugs 7 and 8 which are fitted therein, and a gear case cover mounting plate 9 is used to cut the drill holes 3 and 4 respectively. It covers the front end openings 5 and 6.

In this engine, as shown in FIG. 1C, in order to prevent the lubricating oil leaking from the front end openings 5 and 6 of the drill holes 3 and 4 from flowing out to the outer peripheral side of the engine, Two oil escape holes 10 and 11 are formed in the gear case cover mounting plate 9. As shown in FIG. 1 (D), the oil escape holes 10 and 11 overlap the lower portions of the front end openings 5 and 6 of the drill holes 10 and 11 and are shown in FIG. 1 (A). It faces the inside of the gear case cover 12. Therefore, as shown in FIG. 1 (C), the lubricating oil leaked from the front end openings 5 and 6 of the drill holes 10 and 11 will flow through the oil escape holes 10 and 11 as indicated by arrows 13.14. After that, it will flow out into the gear case cover 12.

[Brief description of drawings]

1 is a diagram illustrating a forced lubrication engine according to an embodiment of the present invention, FIG. 1 (A) is a side view of the engine, and FIG. 1 (B) is BB of FIG. 1 (A). 1A is a vertical cross-sectional view of an enlarged view of an essential part extracted from FIG. 1A, and FIG.
(D) is a view in the direction of the arrow D in FIG. 1 (C).

FIG. 2 is a front view of a gear case cover mounting plate used in a forced lubrication engine according to an embodiment of the present invention.

FIG. 3 is a diagram for explaining a forced lubrication engine according to a conventional technique, and FIG. 3 (A) is a front side view of the engine;
FIG. 3B is a vertical cross-sectional view of an enlarged view of a main part extracted from FIG.

[Explanation of symbols]

1 ... Crank case, 2 ... 1 front surface, 3.4 ... drill hole,
5.6 ... 3/4 front end opening, 7.8 ... blind plug, 9 ...
Gear case cover mounting plate, 10/11 ... oil escape hole, 12 ... gear case cover.

Claims (1)

[Scope of utility model registration request] 1. A rear facing drill hole (3) forming a part of an oil gallery from a front surface (2) of a crankcase (1).
(4) is opened, and the front end opening (5) ・ of this drill hole (3) ・ (4)
The (6) is sealed with the blind plugs (7) and (8) fitted therein, and the gear case cover mounting plate (9) mounted in close contact with the front surface (2) of the crank case (1) is used for the drilling hole. (3) In the forced lubrication type engine that covers the front end openings (5) and (6) of (4), the gear hole cover mounting plate (9) has the drill hole (3),
The oil escape holes (10) and (11) that overlap a part of the front end openings (5) and (6) of (4) are opened, and these oil escape holes (10) and (11) are formed. ) A forced lubrication engine characterized by facing inside.