JP2000282837A - Oil level inspection window of engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oil level inspection window of an engine which can be installed even at a poison which spans the mated surfaces of an oil pan and a crank casing. SOLUTION: This inspection window 6 for visually inspecting the level of oil reserved in an oil reserving chamber 2 in an engine 1, is formed separately from the engine 1. This inspection window 6 has a body 7 to be attached to a surface of the engine 1. The body 7 is provided with a communication chamber 8 communicating with the oil reserving chamber 2 and a window part 9 covering the distal end of the communication chamber 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil level inspection window for visually checking the level of oil stored in an oil storage chamber of an engine.

[0002]

2. Description of the Related Art The amount of oil stored in an oil storage chamber of an engine of a motorcycle or the like is required to satisfy the following conditions. (1) The oil level must be such that air will not be caught by pump suction during acceleration / deceleration or cornering. (2) The amount of oil must be sufficient to circulate and supply each part of the engine. (3) An oil level that does not cause a large drop in output or an increase in oil temperature due to stirring resistance received by a crankshaft or a balancer immersed in oil while the engine is running. (4) When changing oil, the amount of oil to be changed should be small.

[0003] Conventionally, in order to check whether the oil level of an engine is at an oil level set to satisfy the above-described conditions, the oil level is checked by a method such as an inspection window type, a stick type, and a screw type. Checking. In the inspection window type, an inspection window is provided integrally on the outer wall of the oil storage chamber, and the oil level in the oil storage chamber is visually recognized from the inspection window. The stick type is for checking the oil level by inserting a stick into the oil storage chamber. The screw type removes a screw type plug provided on the wall of the oil storage chamber and estimates the oil amount from the oil flowing out at that time. As a related prior art document, there is JP-B-3-29966.

[0004] Of the above-described methods for checking the oil amount, the inspection window type is a method that allows the oil amount to be checked at a glance, and is the mainstream along with the stick type. When the oil level is at a position sufficiently higher than the mating surface between the oil pan and the crankcase under the oil amount satisfying the above-mentioned conditions (1) to (4), the inspection window is provided with the crankcase or the crankcase. It is provided on a clutch cover or the like attached to the side surface.

[0005]

However, in the case of the motorcycle engine, when the inspection window is formed integrally with, for example, a crankcase and is provided so as to protrude to the side, a clutch cover is provided laterally from the crankcase in the vicinity of the inspection window. When the cowling is attached to the motorcycle, the cowling is disposed at a position considerably distant from the inspection window to the side, so that the inspection window becomes difficult to be visually recognized from a peephole formed in the cowling. If the inspection window is made to protrude sideways from the crankcase, the inspection window becomes too conspicuous when the cowling cannot be attached.

In addition, when the oil level is close to the mating surface between the oil pan and the crankcase, the installation position of the inspection window straddles the oil pan and the crankcase. Both the oil pan and the crankcase require complicated processing. Therefore,
Conventionally, the installation of an inspection window at such a position is avoided, and the oil amount is inspected by a stick type which is more troublesome than an inspection window type.

The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide an engine oil level inspection window which can be installed at an easily viewable position. It is a second object of the present invention to provide an engine oil level inspection window that can be installed at a position across a surface.

[0008]

In order to achieve the above object, an engine oil level check window according to a first aspect of the present invention provides a check for visually checking the level of oil stored in an oil storage chamber of an engine. A window having a body attached to the engine, the body having a communication chamber communicating with the oil storage chamber and a window covering a front end of the communication chamber;

According to the engine oil level check window, the engine can be installed by attaching a separate body to the engine. Therefore, even when the engine is installed on a motorcycle engine, for example, the protrusion length differs depending on the presence or absence of a cowling. By selecting and attaching the body, the oil level inspection window can be installed at an easily visible position. Also,
Even if the oil level is near the mating surface between the oil pan and the crankcase, it can be installed by attaching the engine and a separate body to the engine, so it is installed at a position across the mating surface between the oil pan and the crankcase it can.

According to a second aspect of the present invention, in the engine oil level check window according to the first aspect of the present invention, the body has a mating surface between an oil pan and a crankcase forming a lower portion of the oil storage chamber. It is located straddling.

According to the engine oil level check window, the oil level can be checked even when the oil level is close to the mating surface between the oil pan and the crankcase.

According to a third aspect of the present invention, in the engine oil level check window according to the second aspect, the body is attached to one of the oil pan and the crankcase by an attachment member.

According to the oil level check window of the engine, even when the oil level is close to the mating surface between the oil pan and the crankcase, it is only necessary to attach the body to one of the oil pan and the crankcase. Installation is easy.

According to a fourth aspect of the present invention, there is provided an engine oil level inspection window according to the second or third aspect, wherein the body has two upper and lower communication holes communicating the communication chamber and the oil storage chamber. One of the communication holes is formed in a protrusion of the body, and the protrusion is inserted into a through hole provided in an outer wall of the engine, and is provided between an inner peripheral surface of the through hole and an outer peripheral surface of the protrusion. Are sealed in a liquid-tight manner by an elastic sealing member, and a sealing surface is formed around the other communication hole so as to make surface contact with the outer surface of the engine.

According to the oil level check window of the engine, even if there is some dimensional error between the oil pan and the crankcase, this dimensional error is caused by a change in the insertion length of the projection into the through hole. Or the body is displaced in the direction along the seal surface with respect to the outer surface of the engine, so that the communication chamber of the body is always fluid-tightly connected to the oil storage chamber of the engine. Can be.

According to a fifth aspect of the present invention, there is provided an oil level check window for an engine according to any one of the first to fourth aspects, wherein the body has two upper and lower portions communicating with the communication chamber and the oil storage chamber. The upper communication hole has a communication hole, and the upper communication hole is arranged at a position that allows air to flow between the oil storage chamber and the communication chamber when the oil level is at a predetermined upper limit level, and the lower communication hole has a predetermined oil level. It is arranged at a position that allows the oil in the oil storage chamber to flow into the communication chamber when at the lower limit level.

According to the engine oil level inspection window, even when the oil level is at the predetermined upper limit level,
Even when the air in the communication chamber flows into the oil storage chamber from the upper communication hole and the oil level is at the predetermined lower limit level,
Since oil in the oil storage chamber flows into the communication chamber from the lower communication hole, as long as the oil level is between the upper limit level and the lower limit level, the oil level becomes equal between the oil storage chamber and the communication chamber, and the oil level is reduced. We can inspect properly.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIGS. 1, 2 and 3 show a side view, a bottom view and a rear view of an engine having an oil level inspection window according to an embodiment of the present invention. In FIG. 1, an engine 1 is mounted on a motorcycle, and an oil pan 3 forming a lower portion of an oil storage chamber 2 is attached to a lower portion of a crankcase 4. And a cylinder CY which is inclined. An oil level for visually recognizing the level Q of the oil stored in the oil storage chamber 2 at a position straddling the mating surface 5 of the oil pan 3 and the crankcase 4 on the outer surface of the engine 1, in this example, the right side surface. An inspection window 6 is provided. That is, in the engine 1, when the amount of oil stored in the oil storage chamber 2 satisfies the above-described conditions (1) to (4), the oil level becomes near the mating surface 5.

As shown in FIG. 2, the oil level check window 6 projects from the oil pan 3 toward the engine side S, but its tip is located inside the clutch cover 17. When the cowling 33 is attached to the vehicle body as shown in FIG.
Is covered by the cowling 33.

The oil level check window 6 is shown in FIG.
As shown in FIG. 1, a body 7 is formed separately from the oil pan 3 and the crankcase 4 of the engine 1 and attached to the right side of the engine 1. The body 7 protruding toward the engine side S has a communication chamber 8 communicating with the oil storage chamber 2 of the engine 1, and a window 9 covering the end of the communication chamber 8.
Are provided. Above the base end of the body 7, a columnar projection 11 is formed which is inserted into an outer wall of the crankcase 4 constituting the engine 1, in this example, a through hole 10 provided in a right side wall. An upper communication hole 12 is formed in the projection 11 and extends in the axial direction of the projection 11 and communicates the communication chamber 8 with the oil storage chamber 2.

A lower portion of the base end of the body 7 is aligned with a through hole 14 formed in the mounting surface 3a of the right side wall of the oil pan 3 constituting the engine 1 so that the communication chamber 8 and the engine 1 are aligned. A lower communication hole 13 communicating the oil storage chamber 2 is formed. Around the opening of the lower communication hole 13 facing the oil storage chamber 2, a mounting surface 3 a of the oil pan 3 is provided.
A seal surface 15 is formed which makes surface contact with the seal surface. The mounting surface 3a or the sealing surface 15 is orthogonal to the direction in which the protrusion 11 protrudes (axial direction). 4B, a screwing portion 16 for screwing the body 7 to the mounting surface 3a of the oil pan 3, as shown in FIG.
Are formed so as to project downward.

The projection 11 of the body 7 shown in FIG.
An O-ring 21 which is an elastic sealing member for sealing the gap between the inner peripheral surface of the through hole 10 and the inner peripheral surface thereof in a liquid-tight manner.
Is fitted. Also, the sealing surface 1 of the body 7
5 has a lower communication hole 13 and a communication hole 14 on the oil pan 3 side.
An O-ring 22, which is an elastic sealing member that seals the butted portion with a liquid-tight seal, is arranged to surround the opening of the lower communication hole 13. Thus, the seal around the lower communication hole 13 is firmly combined with the seal by the surface contact between the seal surface 15 and the mounting surface 3a of the oil pan 3.

As shown in FIG. 5, a window 9 covering the front end side of the communication chamber 8 in the body 7 has a disc-shaped transparent glass material 23 and an oil A fitting member 24 having a hat-shaped cross section to be fitted into the storage chamber 2, and the transparent plate glass material 23 and the fitting member 2
4 comprises a ring member 25 integrally connected to the outer periphery of these two members. Further, an elastic seal member 28 is provided in a portion extending from the outer peripheral surface to the front peripheral edge of the ring member 25. The window 9 presses the rear end of the ring member 25 against a shoulder 26 a of an enlarged diameter opening 26 formed on the distal end side of the communication chamber 8 in the body 7 shown in FIG. Is secured to the tip of the body 7 by a C-shaped retaining member 27 fitted to the inner periphery of the enlarged diameter opening 26 so as to contact the front end of the body 7. In this state, the sealing member 28
The space between the inner peripheral surface of the enlarged diameter opening 26 and the outer peripheral surface of the window 9 in the body 7 is sealed in a liquid-tight manner.

The fitting member 24 shown in FIG. 5 has a plurality of through-holes 24a, and through the through-holes 24a, the back surface of the transparent plate glass material 23 is connected to the communication chamber 8 (FIG. 4 (A)). Is facing. Further, an upper limit scale 29 indicating the upper limit level of the oil stored in the oil storage chamber 2 and a lower limit scale 30 indicating the lower limit level are provided on the periphery of the tip end of the body 7 shown in FIG. . The oil levels indicated by the upper scale 29 and the lower scale 30 are as described in (1) to (1) above.
The upper and lower limits of the amount of oil satisfying the condition (4) are shown.

The body 7 of the oil level check window 6 is
As shown in FIG. 6, the protrusion 11 on the upper end of the base is press-fitted into the through hole 10 of the crankcase 4, and the screwing portion 16 projecting downward on the base end is bolted to a bolt 31 (FIG. By screwing in (B)), the engine 1 is mounted on the right side of the engine 1 at a position straddling the mating surface 5 of the oil pan 3 and the crankcase 4. The O-ring 21 seals between the outer peripheral surface of the projection 11 of the body 7 attached in this way and the inner peripheral surface of the through hole 10 of the crankcase 4, so that the oil storage chamber 2 of the engine 1 is The communication chamber 8 communicates with the communication chamber 8 through the upper communication hole 12 in a liquid-tight manner. In addition, the space between the seal surface 15 of the body 7 and the mounting surface 3a of the oil pan 3 is sealed by the O-ring 22, so that the oil storage chamber 2 of the engine 1 and the communication chamber 8 of the body 7 communicate with the lower communication hole. The liquid-tight communication can also be achieved via 13.

In the above configuration, since the oil level check window 6 has the body 7 separate from the engine 1 shown in FIG. 4 attached to the outer surface of the engine 1, the oil level check window 6 has the oil level 3 as described above. Even if it is near the mating surface 5 of the engine and the crankcase 4, it can be installed at a position straddling the mating surface 5, and the oil level can be checked at a glance. In addition, as shown in FIGS. 4A and 4B, the body 7 is screwed to the oil pan 3 only with the bolt 31 as a mounting member, so that the oil level inspection window 6 is provided. Installation becomes easy.

Since the oil pan 3 and the crankcase 4 are bolted to each other with the gasket 32 interposed between the mating surfaces 5, the gap between the oil pan 3 and the crankcase 4 fluctuates. There may be a slight dimensional error in the interval between the hole and the conduction hole 14. However, in the oil level inspection window 6, since the screwing of the body 7 is performed only on the oil pan 3 side, there is the dimensional error. Also,
The dimensional error can be absorbed at the time of the screwing. As a result, the body 7 can be attached to the engine 1 while maintaining the seal by the O-rings 21 and 22.

Further, since the sealing for the two communication holes 12 and 13 is performed by the projection 11 and the sealing surface 15, the dimensional error between the oil pan 3 and the crankcase 4 is shown in FIG. The dimensional error in the left-right direction of the engine 1, that is, the left-right direction of the engine 1
The dimensional error in the up-down direction is absorbed by the change in the insertion length of the body 7 due to the displacement of the sealing surface 15 of the body 7 in the direction along the sealing surface 15 with respect to the mounting surface 3a on the engine side. Absorbed. Therefore, regardless of the dimensional error, the sealing property between the body 7 and the engine 1 is maintained, and the communication chamber 8 of the body 7 can be connected to the oil storage chamber 2 of the engine 1 in a liquid-tight manner.

The upper communication hole 12 of the body 7 is
When the oil stored in the oil storage chamber 2 of the engine 1 is at the upper limit level, the oil storage chamber 2 is located at a height allowing air to flow between the oil storage chamber 2 and the communication chamber 8, and the lower communication hole 13 is When the level of oil Q is at the lower level,
Since the oil Q in the oil storage chamber 2 is located at a height that allows the oil Q to flow into the communication chamber 8, the oil Q in the oil storage chamber 2 communicates as long as the oil Q is between the lower limit level and the upper limit level. The level of oil flowing into the chamber 8 is equal to the oil level in the oil storage chamber 2. Therefore,
The oil level in the communication chamber 8 is adjusted by the window 9 at the tip of the body 7.
By observing from above, the oil level in the oil storage chamber 2 can be visually recognized. In addition, the visually recognized oil level is adjusted by an upper scale 29 and a lower scale 30 provided at the tip of the body 7.
By comparing with, it can be confirmed whether or not the amount of oil in the oil storage chamber 2 is within an allowable range.

In the oil level check window 6, since the body 7 separate from the engine 1 is attached to the outer surface of the engine by screwing, the engine 1 is mounted on the cowling 33 as shown by a chain line in FIG. The position of the oil level inspection window can be easily viewed by selecting and mounting the body 7 having a different protruding length depending on whether the vehicle is mounted on a motorcycle equipped with a motorcycle or a motorcycle equipped with no cowling 33. Can be set to That is,
In the case of a motorcycle provided with a cowling 33, the body 7 protruding to a position close to the cowling 33 is selected and attached, and a peephole 34 is formed at a position of the cowling 33 facing the body 7, so that the peeping is performed. The oil level check window 6 can be looked through the hole 34. If the cowling 33 is not provided, the use of the short body 7 prevents the oil level check 6 from being too noticeable.

In the above-described embodiment, the case where the lower side of the base end of the body 7 of the oil level inspection window 6 is screwed to the oil pan 3 side is different from this. The upper part is screwed to the crankcase 4 side, and the projection inserted into the through hole formed in the oil pan 3 is formed below the base end of the body 7 so that the oil pan 3 and the crankcase 4 The body 7 may be located across the mating surface 5.

In the above-described embodiment, the body 7 is located at a position across the mating surface 5 of the oil pan 3 and the crankcase 4.
In the case where the upper and lower oil levels are sufficiently higher than, for example, the mating surface 5, the oil level is attached to the clutch cover 17 at the same position as that of the conventional example shown by a chain line in FIG. Or may be attached to the crankcase 4. Also in this case, since the body 7 of the oil level inspection window 6 is separate from the engine 1, the body 7 having a different protruding length is selected and attached according to the presence or absence of the cowling 33, so that the oil level inspection window is provided. 6
Can be set to a position that is easy to see.

[0033]

As described above, according to the engine oil level check window of the present invention, the communication chamber having the body attached to the outer surface of the engine, the communication chamber communicating with the oil storage chamber and the communication body, A window that covers the front end of the chamber is provided, so even when installing on a motorcycle engine, the oil level can be easily viewed by selecting a body with a different protruding length depending on the presence or absence of a cowling and installing it. Inspection windows can be installed. Further, even when the oil level is near the mating surface between the oil pan and the crankcase, the oil level can be set at a position straddling the mating surface between the mating surface and the crankcase.

[Brief description of the drawings]

FIG. 1 is a side view of an engine having an oil level inspection window according to an embodiment of the present invention.

FIG. 2 is a bottom view showing a main part of the engine.

FIG. 3 is a rear view of the engine.

FIG. 4A is an exploded longitudinal sectional view showing an oil level inspection window, and FIG. 4B is a front view showing a part of the oil level inspection window in a cutaway manner.

FIG. 5 is an exploded perspective view of a window in the oil level inspection window.

FIG. 6 is a longitudinal sectional view of the oil label inspection window.

[Explanation of symbols]

1 ... Engine, 2 ... Oil storage room, 3 ... Oil pan, 4
... Crank case, 5 ... Mating surface, 6 ... Oil level check window, 7 ... Body, 8 ... Communication room, 9 ... Window, 10 ... Through hole, 11 ... Protrusion, 12 ... Upper communication hole, 13 ... Lower communication Hole, 15: sealing surface, 21: O-ring (seal member),
31: Bolt (mounting member), Q: Oil level

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[Procedure amendment]

[Submission date] January 24, 2000 (2000.1.2
4)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007] The present invention has been made in view of the above circumstances, is to provide an oil level sight glass for an engine that can be installed easily visible position the first object, also, OY
Level near the mating surface between the oil pan and the crankcase
A second object of the present invention is to provide an engine oil level check window that can check the oil level even when it is nearby .

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

[0008]

In order to achieve the above-mentioned object, an engine oil level check window according to a first aspect of the present invention forms a lower portion of an engine oil storage chamber.
At the position straddling the mating surface between the oil pan and the crankcase
Is installed, the a sight glass to visually recognize the level of oil stored in the oil storage chamber, attached to the side of the engine, has a body that protrude engine side, to the body, the oil reservoir A communication room that communicates with the room and a window that covers the end of the communication room are provided.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction contents]

According to the engine oil level check window, the engine can be installed by attaching a separate body to the engine. Therefore, even when the engine is installed on a motorcycle engine, for example, the protrusion length differs depending on the presence or absence of a cowling. By selecting and attaching the body, the oil level inspection window can be installed at an easily visible position. Also,
Even when the oil level is near the mating surface between the oil pan and the crankcase, the oil level can be checked .

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Deleted

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0011

[Correction method] Deleted

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

Further, the oil level sight glass for an engine according to claim 2 of the present invention, in the configuration of claim 1, wherein the body is mounted by a mounting member on only one of the oil pan or the crankcase.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction contents]

According to a third aspect of the present invention, in the engine oil level check window according to the first or second aspect, the body has two upper and lower communication holes that communicate the communication chamber and the oil storage chamber. One of the communication holes is formed in a protrusion of the body, and the protrusion is inserted into a through hole provided in an outer wall of the engine, and is provided between an inner peripheral surface of the through hole and an outer peripheral surface of the protrusion. Are sealed in a liquid-tight manner by an elastic sealing member, and a sealing surface which is in surface contact with the outer surface of the engine and is orthogonal to the projecting direction of the projection is formed around the other communication hole.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction contents]

According to a fourth aspect of the present invention, there is provided an engine oil level check window according to any one of the first to third aspects, wherein the body has two upper and lower portions communicating with the communication chamber and the oil storage chamber. The upper communication hole has a communication hole, and the upper communication hole is arranged at a position that allows air to flow between the oil storage chamber and the communication chamber when the oil level is at a predetermined upper limit level, and the lower communication hole has a predetermined oil level. It is arranged at a position that allows the oil in the oil storage chamber to flow into the communication chamber when at the lower limit level.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0032

[Correction method] Deleted

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0033

[Correction method] Change

[Correction contents]

[0033]

As described above, according to the engine oil level check window of the present invention, the communication chamber having the body attached to the outer surface of the engine, the communication chamber communicating with the oil storage chamber and the communication body, A window that covers the front end of the chamber is provided, so even when installing on a motorcycle engine, the oil level can be easily viewed by selecting a body with a different protruding length depending on the presence or absence of a cowling and installing it. Inspection windows can be installed. Further, even when the oil level is near the mating surface between the oil pan and the crankcase, the oil level can be checked .

Claims (5)

[Claims] 1. An inspection window for visually checking the level of oil stored in an oil storage chamber of an engine, the communication window having a body attached to the engine, the body having a communication chamber communicating with the oil storage chamber,
An engine oil level inspection window provided with a window covering the end of the communication chamber. 2. The engine oil level inspection window according to claim 1, wherein the body is located across a mating surface of an oil pan and a crankcase forming a lower portion of the oil storage chamber. 3. The engine oil level inspection window according to claim 2, wherein the body is attached to one of the oil pan and the crankcase by an attachment member. 4. The body according to claim 2, wherein the body has two upper and lower communication holes communicating the communication chamber and the oil storage chamber, and one of the communication holes is formed in a protrusion of the body. The protrusion is inserted into a through-hole provided on the outer wall of the engine, and the space between the inner peripheral surface of the through-hole and the outer peripheral surface of the protrusion is liquid-tightly sealed by a sealing member having elasticity. An engine oil level inspection window with a seal surface formed around it to make surface contact with the outer surface of the engine. 5. The body according to claim 1, wherein the body has two upper and lower communication holes communicating the communication chamber and the oil storage chamber, and the upper communication hole has a predetermined upper limit oil level. Is located at a position that allows air to flow between the oil storage chamber and the communication chamber when the oil level is at a lower level, and the lower communication hole allows oil in the oil storage chamber to flow into the communication chamber when the oil level is at a predetermined lower limit level. The engine oil level inspection window is located at a position that allows the engine.