JPH0735733U - Internal combustion engine - Google Patents

Abstract

(57) [Summary] [Purpose] Each part can be arranged reasonably and centrally, and the engine body and engine accessories can be widely covered with a single cover that can be opened and closed. Not only can inspection and adjustment be performed while overlooking all inspection points at once, work can be performed quickly and easily, and the number of parts can be reduced as much as possible.
To provide an internal combustion engine which can be constructed inexpensively and safely as a whole. [Structure] In the main body cover 50, the engine main body 10 and
Various engine accessories 21, 2 of the engine body 10
In the internal combustion engine 1 equipped with 2, 31, 40, ... At least the engine accessory parts 21, 22, 31, 40 ,. A single opening / closing cover 60 that covers the engine accessory parts 21, 22, 40, ...

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an internal combustion engine, and more particularly to an internal combustion engine having a cover for maintenance and inspection.

[0002]

[Prior art]

 Generally, in a small internal combustion engine equipped with various engine accessories such as a fuel device such as a fuel tank and a carburetor, and an intake / exhaust device such as an air cleaner and a muffler in a main body of the engine, for example, a vertically arranged cylinder is installed. A fuel tank is arranged laterally above or below the engine body that the engine has, and the engine accessory is located below or above the fuel tank and around the engine body.

[0003]

[Problems to be solved by the device]

 In the conventional internal combustion engine as described above, various engine accessories are arranged in a distributed manner, so in order to protect the engine accessories and the engine body, for example, a cylinder cover, an air cleaner cover, a fan cover, etc. A plurality of protective covers such as the above are also dispersedly arranged at the positions corresponding to the respective parts, and the protective covers are provided with openings for inspection and maintenance.

With such a conventional configuration, even when an operator tries to inspect and adjust engine accessory parts, it is difficult to perform work while looking over the entire inspection site due to the presence of blind spots. Instead, the work must be performed from narrowly distributed inspection ports, etc., so maintenance work is often required unless the posture is changed for each target part, which increases the fatigue level of the worker. And the workability was not good. In addition, the number of parts is large, and since the internal combustion engine has protrusions such as the handle of the cover, and there are irregularities between the multiple covers, the aircraft may get caught on the tree branches, which also contributes to safety. There was a problem.

The present invention has been made in view of the above problems, and an object thereof is, in particular, to make it possible to arrange each part reasonably and centrally, and yet to open and close the unit. The cover is designed to cover the engine body and engine accessories in a wide range, and it is possible to perform inspection and adjustment while looking at all the inspection points at once, which not only enables quick and easy work, but also minimizes the number of parts. It is an object of the present invention to provide an internal combustion engine that can be reduced in quantity and that can be constructed inexpensively and safely as a whole.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, an internal combustion engine according to the present invention is basically an internal combustion engine having an engine main body and various engine accessories of the engine main body in a main body cover. It is characterized in that the engine accessories that require inspection and maintenance are centrally arranged, and the engine accessories that are centrally arranged are covered with a single opening / closing cover. .

Further, as a more specific example of the present invention, the opening / closing cover is provided with a urging means for constantly urging the opening / closing cover in the opening direction, and is pivotally attached to the main body cover. It is characterized in that it is attached to the main body cover so as to be openable and closable via a locking portion capable of engaging and disengaging with the body cover.

[0008]

[Work]

 In the internal combustion engine configured as described above, the opening / closing cover can be easily opened / closed by a one-touch operation for engaging / disengaging the engaging portion. Also, since the engine body and engine accessories are widely covered with a single cover, you can quickly and easily perform inspection and adjustment while looking at all the inspection points at once with the open / close cover open.

[0009]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is an overall perspective view of an internal combustion engine in which an opening / closing cover is opened to show engine accessories centrally arranged in the upper portion of the embodiment of the present invention, and FIG. 2 is a state in which the opening / closing cover is closed. 2 is a cross-sectional view taken along the line II of FIG. Further, FIG. 3 is a front view taken along the arrow III in which a front side portion of the main body cover is cut out in order to schematically show the inside of the internal combustion engine in FIG.

The internal combustion engine 1 of the illustrated example is an example of an air-cooled gasoline engine, and as shown schematically in FIG. 3, an inclined cylinder 11 having a cylinder head 12 formed at the upper end is formed on the upper part. The engine main body 10 is provided with a crank case and a crank shaft (not shown) at the bottom, and intake system accessories such as an air cleaner 21 and a carburetor 22 connected to the intake side of the engine main body 10, It comprises a muffler 31 connected to the exhaust system of the engine body 10, a fuel tank 40 having a filler cap 40a, and various engine accessories described later. Various internal combustion engine parts except the fuel tank 40 are housed in a main body cover 50 made of a substantially box-shaped plastic molding material that is open upward, and the fuel tank 40 is fixed to the main body cover 50 by an appropriate fixing means. It is fixed by. As will be described later in detail, the upper opening 51 of the main body cover 50 and the upper portion of the fuel tank 40 (almost all internal combustion engine accessory parts) are pivotally attached to the main body cover 50 so as to be openable and closable. The lid is closed by a relatively large open / close cover 60.

As shown in FIG. 1, in the upper opening 51 of the body cover 50, a spark plug (not shown) attached to the cylinder head 12, an ignition coil 23, and an ignition coil. 23, an ignition device including a high tension cord 24 for connecting the spark plug, the air cleaner 21, the carburetor 22, the filler cap 40a of the fuel tank 40, the fuel tank 40 and the carburetor 22. Ventilation for returning to the intake system (air cleaner 21) the blow-by gas such as unburned gas that has undergone partial oxidation that causes air pollution, and a fuel device consisting of a connected fuel pipe 25 and the like.・ The internal combustion engine accessory including the pipe 26 is the opening / closing cover. All of them are centrally arranged so as to be exposed to the outside when the 60 is opened.

A frusto-conical starter cover portion 50 a on which the recoil handle 34 is seated is integrally formed at a position corresponding to the recoil starter 53 arranged in the body cover 50. Further, the cylinder 11 portion is provided with a cooling air guide and a cylinder cover 54 for heat insulation which are detachable.

The opening / closing cover 60 is attached to the main body cover 50 so as to be openable / closable and detachable. That is, as shown in FIG. 2, a circular ring-shaped bearing portion 52 integrally formed at the upper end of a vertical wall (back side in FIG. 1) on one side of the main body cover 50 and one side of the opening / closing cover 60. And a circular ring-shaped bearing portion 62 integrally formed with each other, the circular holes are arranged so as to overlap each other, the hinge shaft 71 is inserted into the circular holes, and the opening / closing cover 60 is opened in the opening direction ( A pivot 72 is formed by winding a spring 72, which is constantly biased in a clockwise direction in FIG. 2, around the hinge shaft 71.

Further, a locking portion 80 of the opening / closing cover 60 is formed at an upper end portion of a vertical wall (front side in FIG. 1) of the main body cover 50 on the side opposite to the pivotally attaching portion 70. The locking portion 80 includes a hinge shaft 81 that extends in the horizontal direction, a pedestal portion 82 that supports and fixes the hinge shaft 81, and a swing member 83 that is swingably supported around the hinge shaft 81. The engagement member 63 is engaged with the engagement holes 63, 63 formed in the opening / closing cover 60 so as to engage the engagement claw portion 83a formed integrally on the upper portion of the oscillation member 83. And a spring 84 that constantly urges in a direction (counterclockwise in FIG. 2). As shown in FIGS. 1 and 2, the rocking member 83 includes a base portion 83b integrally formed with a circular ring-shaped bearing portion which is pivotally supported by the hinge shaft 81 on the back surface, and left and right portions on the upper portion of the base portion 83b. It is composed of the two engaging claw portions 83a, 83a formed so as to extend in the direction, and has a substantially T shape in a front view of FIG.

Further, the opening / closing cover 60 is necessary at an appropriate position, for example, so that the priming pump 22a of the carburetor 22 and various needle valves (not shown) can be operated with the opening / closing cover 60 closed. Inspection ports 65 and 66 having a corresponding size, number and shape are provided. Further, an interference avoiding notch 67 is formed in which the base portion 83b of the swinging member 83 is positioned when the opening / closing cover 60 is closed. Next, the operation of the internal combustion engine of one embodiment of the present invention constructed as above will be described.

When the opening / closing cover 60 is closed (shown by the solid line in FIG. 2), the engaging claws 83a, 83a of the swing member 83 engage with the engaging holes 63, 63 of the opening / closing cover 60. It is matched. From this state, when the upper portion of the base portion 83b of the swinging member 83 is pressed in the right direction in FIG. 2 (the direction indicated by the chain double-dashed line), the engaging claw portions 83a, 83a are disengaged from the engaging holes 63, 63. The opening / closing cover 60 is automatically rotated by the urging force of the spring 72 about the hinge shaft 71 in the clockwise direction of FIG.

When the opening / closing cover 60 is open, the centrally arranged air cleaner 21, the carburetor 22, and other engine accessory parts are exposed to the outside in a wide range. Work such as inspection and adjustment can be done quickly and easily while looking over all the places. In addition, the internal combustion engine in the example shown has a structure that covers the entire upper part with a single opening / closing cover, so it is possible to present a smooth appearance with few protrusions on the surface, and it is possible for the operator It is possible to prevent contact with other members such as the human body and tree branches, and improve safety.

Needless to say, even if the opening / closing cover 60 is not opened, it is possible to operate the recoil handle 34, the priming pump 22a, a choke (not shown), etc., which are necessary for the starting operation. Although one embodiment of the present invention has been described in detail above, the present invention is not limited to the above-described embodiment, and various embodiments can be made without departing from the present invention described in the scope of claims for utility model registration. Design changes can be made. For example, in the illustrated example, the head cover 54 is formed separately from the main body cover 50 and the opening / closing cover 60, but it may be integrally formed on the opening / closing cover 60 side. By doing so, when the opening / closing cover 60 is opened, the cylinder head 12 is also exposed to facilitate the inspection.

[0019]

[Effect of device]

 As can be understood from the above description, each part can be arranged reasonably and centrally, and the engine body and engine accessories can be widely covered by a single openable / closable cover. Not only can inspection and adjustment be performed while overlooking all inspection points at once, work can be performed quickly and easily, the number of parts can be reduced as much as possible, and the entire system is inexpensive and safe. Can be configured to.

[Brief description of drawings]

FIG. 1 is an overall perspective view of an internal combustion engine with an opening / closing cover opened to show engine accessories centrally arranged on an upper portion of the embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II of FIG. 1 with the opening / closing cover closed.

FIG. 3 is a front view as seen from an arrow III in which a front side portion of a main body cover is cut out to schematically show the inside of the internal combustion engine in FIG.

[Explanation of symbols]

 10 engine body 21 engine accessory (air cleaner) 22 engine accessory (carburetor) 31 engine accessory (muffler) 40 engine accessory (fuel tank) 50 body cover 60 open / close cover 70 pivot part 72 biasing means 80 locking part

Claims (2)

[Scope of utility model registration request] 1. An engine main body 10 is provided in a main body cover 50.
And various engine accessory parts 21 of the engine body 10,
In the internal combustion engine 1 equipped with 22, 31, 40, ... At least the engine accessories 21, 22, 31, 40, ... An internal combustion engine characterized in that the engine accessory parts 21, 22, 40, .. 2. The opening / closing cover 60 is the opening / closing cover 6.
0 via a pivoting portion 70 with the body cover 50, which includes a biasing means 72 for constantly biasing 0 in the opening direction, and a locking portion 80 capable of engaging and disengaging the body cover 50. The internal combustion engine according to claim 1, wherein the internal combustion engine is attached to the body cover 50 so as to be openable and closable.