JPS61138810A - Drain structure for engine oil in motorcycles - Google Patents

Abstract

PURPOSE:To make engine oil dischargeable out of a drain port without sticking to a frame and an exhaust system, by installing a tray, extending sidewards beyond the top of the frame, in position between an engine lower part corresponding to the drain port and an exhuast system upper part, while making this tray detachable at will. CONSTITUTION:A tray 7 inserts an extension piece 7c into a space between a lower part of an engine 1 and an upper part of a muffler 3d and fits an engaged bracket 7b in the top of a down tube 2b. If so, a trough part 7a comes into a state of extending sidewards beyond the top of the down tube 2b from an outlet lower part of a drain port. Here, when a drain bolt 4 is removed, engine oil is discharged out of the drain port 5 to the trough part 7a of the tray 7. Therefore, the engine oil is dischargeable without sticking to a frame 2 and an exhaust system 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an engine oil drain structure in a motorcycle or three-wheeled motor vehicle (hereinafter referred to as a motorcycle, etc.) in which an exhaust device is disposed below the engine.

[Prior art]

As described in Japanese Utility Model Publication No. 52-50526, some motorcycles and the like have an exhaust device disposed below the engine in order to increase the capacity of the exhaust expansion chamber of the exhaust device. In such engines, the engine oil drain hole is usually located on the side of the engine.

At the beginning when engine oil is drained from the engine's drain hole, there is a lot of force so it does not stick to the frame, etc., but towards the end of the drain, the force decreases and it starts to stick to the frame and exhaust system. become. Engine oil that adheres in this way not only stains the car body, but also
Particularly if it adheres to the exhaust system, it will burn due to exhaust heat and produce a bad odor, so it is necessary to wipe it clean.

[Purpose of the invention]

The aim of the invention is to, by using simple aids,
To provide an engine oil drain structure for a motorcycle, etc., which prevents engine oil being discharged from a drain hole from adhering to a frame or an exhaust device.

[Structure of the invention]

To achieve the above object, the present invention provides a motorcycle or the like in which an exhaust device is disposed below an engine mounted on a frame, and a drain hole for engine oil is provided on a side surface of the lower part of the engine. and an upper part of the exhaust device, the main body of the tray is configured to extend laterally beyond the upper surface of the frame, and the tray is detachably attached to the frame. It is something to do.

〔Example〕

Hereinafter, the present invention will be explained with reference to embodiments shown in the drawings.

In the motorcycle shown in FIG. 3, 1 is an engine and 2 is a frame. The engine 1 is mounted in an area surrounded by a main frame 2a and a down tube 2b that constitute the frame 2.

An exhaust pipe 3a is connected to an exhaust hole of the engine 1, and a muffler 3b is connected to the rear end of the exhaust pipe 3a, thereby forming an exhaust system 3. This noise reduction W3b of the exhaust system 3 is the engine 1
It is located below the engine and forms a large capacity exhaust expansion chamber inside.

A drain hole 5 to which a drain port 4 is removably screwed is provided on a side surface of the crankcase 1a at the bottom of the engine 1 near the bottom thereof.

A side stand 6 is attached to the lower part of the down tube 2b so as to be switchable between an upright position and a collapsed position. When the side stand 6 is in the upright position, it extends diagonally downward from the vehicle body, allowing the vehicle to be parked in a sideways tilted state.

FIG. 2 shows a tray 7 used when draining engine oil from the drain hole 5. As shown in FIG.

This tray 7 has a main body portion formed as a bridge portion 7a, and a locking bracket 7b having a U-shaped cross section is welded to the lower surface of the bridge portion 7a. Furthermore, an extension piece 7c is integrally formed at the rear end of the bridge portion 7a.

As shown in FIG. 1, when discharging engine oil, the tray 7 has an extension piece 7C inserted between the lower part of the engine 1 and the upper part of the silencer 3b, and the locking bracket 7b
By fitting it onto the top surface of the down tube 2b,
The bridge portion 7a of the main body portion can extend outward from below the outlet of the drain hole 5, beyond the upper surface of the down tube 2b. On the other hand, when the side stand 6 is erected and the vehicle is parked, the vehicle changes from the upright state A shown in the figure to the inclined state A'.

When the drain port 4 is removed in this state, the engine oil inside the engine 1 is discharged from the drain hole 5 while being guided to the bridge portion 7a of the tray 7. Even if the engine oil inside engine 1 decreases and the force of exhaust decreases,
Since the engine oil is guided through the bridge section 7a, it does not adhere to the down tube 2b, and the extension piece 7C at the rear end of the bridge section 7a is inserted between the lower part of the engine 1 and the upper part of the silencer section 3b. Since it is in this state, it will not adhere to the sound deadening section 3b.

Furthermore, since the tray 7 can be attached to the down tube 2b via the locking bracket 1-7b, it can be removed and stored in a tool box or the like after the engine oil has been discharged.

In the above-mentioned embodiments, the case of a motorcycle has been described, but the drain device of the present invention can also be applied to a tricycle, etc., as long as the exhaust device is disposed below the engine.

〔Effect of the invention〕

As described above, the present invention provides a motorcycle or the like in which an exhaust device is disposed below an engine mounted on a frame, and a drain hole for engine oil is provided on the side surface of the lower part of the engine, in which a drain hole is provided in the lower part of the engine corresponding to the drain hole. The main body of the tray, one end of which can be freely inserted between the upper part of the exhaust system and the upper part of the exhaust system, is configured to extend laterally beyond the upper surface of the frame, and the tray can be attached to and detached from the frame. Engine oil can be discharged from the drain hole without adhering to the exhaust system.

[Brief explanation of drawings]

Fig. 1 is a longitudinal sectional view showing an engine oil drain structure according to an embodiment of the present invention, Fig. 2 is a perspective view of a tray used in the drain structure, and Fig. 3 is a view of a tricycle in which the same structure is commonly used. FIG. 1... Engine, 2... Frame, 2a.
・・Main frame, 2b・Down tube, 3・
...exhaust device, 3a...exhaust pipe, 3b...silencer, 4...drain bolt, 5...drain hole,
7-) Ray, 7a...Bridge part (main body part), 7b
... Locking bracket, 7C... Extension piece.

Claims (1)

[Claims] In a motorcycle, etc., in which an exhaust device is placed below the engine mounted on a frame, and an engine oil drain hole is provided on the side of the bottom of the engine, one end is placed between the bottom of the engine corresponding to the drain hole and the top of the exhaust device. An engine oil drain for motorcycles, etc., characterized in that the main body of the tray into which the tray can be freely inserted extends laterally beyond the upper surface of the frame, and the tray is detachably attached to the frame. structure.