JP2504888Y2 - Recoil starter mounting structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recoil starter mounting structure attached to a small internal combustion engine as a manual starter.

[0002]

2. Description of the Related Art Conventionally, a recoil starter for a small internal combustion engine (hereinafter, the internal combustion engine is also referred to as an engine), for example, a recoil starter attached to a portable engine used for a brush cutter, is provided on a side surface of a crankcase of the engine. It was directly screwed, and the engine cover was separately screwed to the crankcase side of the engine at another place.

Further, like the engine cover, the tank bracket having the other end attached to the tank side is also screwed separately at a place different from the recoil starter, or is overlapped with the upper surface of the recoil starter. It was screwed to the crankcase side using the same mounting screw. As a prior art of this kind, there is Jikho Sho 58-47215.

[0004]

However, in the above-mentioned structure, the lower portion of the engine cover, which is entirely made of a thin plate and has a small geometrical moment of inertia, is low in rigidity. There is an inconvenience that a so-called “chatter” phenomenon occurs that resonates during engine operation. This "chattering" causes abnormal noise, shortens the life of the engine cover, and may cause loosening of the mounting screw attached in some cases.

Also, in terms of appearance, the edge of the recoil starter and the edge of the engine cover are present separately, and in addition, the tank bracket is attached at another place, which gives a complicated design impression. It was something to give.

The present invention has been made under the present circumstances as described above, and pays attention to the high rigidity of the recoil starter which is integrally formed three-dimensionally in order to include the reel inside. It is an object of the present invention to provide a recoil starter mounting structure that does not cause "chattering" in the engine cover and that is simple in appearance of the engine by devising a mounting structure of the recoil starter.

[0007]

A recoil starter mounting structure according to the present invention forms a seat surface for mounting a recoil starter on a side portion of an engine crankcase, and between the seat surface and a mounting end surface of the recoil starter. To form a gap for inserting an attached member such as an engine cover or a tank bracket, and at least a part of an end portion of the attached member such as an engine cover or a tank bracket is inserted and sandwiched in the gap. It is characterized in that it was extended.

[0008]

With the recoil starter mounting structure according to the present invention, when the recoil starter is attached to the side portion of the crankcase of the engine, the attached member such as a thin plate-like engine cover is inserted. When attached, the attached member is sandwiched while being pressed from the upper surface by the recoil starter having high rigidity, so that it can be maintained in a predetermined optimum state without resonating even during engine operation.

Similarly, the attached member such as the tank bracket also has a very simple appearance and is excellent in design because the upper surface of the attachment side of the crankcase is covered with the recoil starter. You can get what you want.

Further, as described above, since the attachment screw for attaching the recoil starter can be used to attach the attached member such as the engine cover or the tank bracket,
The number of parts and mounting man-hours can be reduced.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is an overall front view of a small engine according to an embodiment of the present invention as seen from the recoil starter mounting side.
1 is a partial cross-sectional view of the recoil starter attachment structure as viewed from the direction of arrows I-I in FIG. 1, and FIG. 3 is a view showing a recoil starter attachment seat surface formed on a side portion of a crankcase of the engine.
II-II is an arrow view of FIG.

In FIGS. 1 and 2, 1 is a recoil starter, 2 is a crankcase of the engine E, 3 is an engine cover, and 4 is a tank bracket.

As shown in FIG. 2, a side portion 2A of the crankcase 2 of the engine E on which the recoil starter 1 is attached.
A seat surface 2a is formed on the. This seat surface 2a is formed of a flat surface in this embodiment, and the flat surface is geometrically viewed from a direction orthogonal to the surface, as shown by dots in FIG.
A roughly quadrilateral consisting of a slightly wider edge at the top and side edges that are continuous with it, and a narrow edge at the bottom (more precisely, a shape in which a downward protruding portion is formed in the center of the bottom portion) A screw hole 5 for attaching the recoil starter is formed in the center of the edge portion in the left-right direction and at both corners of the lower portion of the quadrangle.

The mounting end surface 1A of the recoil starter 1 on the crankcase 2 side has the shape of the seat surface 2a (see FIG. 3) as shown in FIG. 5 which is a view taken along the line III-III in FIG. And a seating surface 2a (see FIG. 3) for sandwiching the engine cover 3 (see FIG. 2), which is indicated by dots in FIG. ) Substantially abutting against () (to be exact, there is a very small gap). A step indicated by reference numeral 1d in FIG. 5 is formed on the pressing portion 1a and the play portion 1b.

As shown in FIG. 2, a gap for inserting the engine cover 3 is provided between the seating surface 2a and the pressing portion 1a. A slightly narrow gap 10 and a gap 11 for inserting the tank bracket 4 (in this embodiment, a gap slightly narrower than the thickness of the tank bracket 4) are formed.

Further, as shown in FIG. 5, the recoil starter 1 has a through hole for inserting the mounting screw B (see FIG. 1) at a position corresponding to the mounting screw hole 5 (see FIG. 3). 6 is formed.

As shown in FIG. 2, the lower portion (skirt portion) of the engine cover 3 is mounted on the engine E main body at a predetermined position, and the seat surface 2a of the crankcase 2 and the recoil starter 1 are attached. It is extended so as to be inserted into the gap 10 formed by the pressing portion 1a. That is,
As shown in FIG. 4, the lower part of the engine cover 3 is upside down L
The former is moved downward so that the lower edge 3a that is adjacent above the part 3A that is cut into a letter shape and the side edge 3b that is adjacent to the side are inserted into the gap 10 (see FIG. 2). Is extended to the left in FIG. This extended portion is shown with dots in FIG.

An attachment hole 7 for a mounting screw B (see FIGS. 1 and 2) is formed in a portion of the extended portion corresponding to the through hole 6 (see FIG. 5). ing.

Further, the upper portion 4a of the tank bracket 4 which is bent in the left-right inverted L shape in FIG. 2 is attached to a predetermined position of the engine E main body as shown in FIGS. It is extended upward so as to be inserted into a gap 11 formed by the seat surface 2a of the crankcase 2 and the pressing portion 1a of the recoil starter 1. Then, as indicated by a chain double-dashed line in FIG. 3, the through hole 6 of the extended portion is formed.
An attachment hole 8 for a mounting screw B (see FIG. 1) is formed in a portion corresponding to (see FIG. 5).

However, the present recoil starter attachment structure constructed as described above operates as follows.

That is, at the time of assembly, as shown in FIG. 3, the engine cover 3 shown by a chain double-dashed line on the plane of the seat surface 2a of the crankcase 2 on the upper and right portions in FIG.
And the upper portion of the tank bracket 4 indicated by the chain double-dashed line is overlapped on the lower surface of the seat surface 2a in FIG. At this time, the mounting hole 7 of the engine cover and the mounting hole 8 of the tank bracket 4 are positioned so as to coincide with the screw hole 5 formed on the seat surface 2a of the crankcase 2.

Next, in this state, as shown in FIG. 2, the recoil starter 1 is covered from above (right side in FIG. 2). At this time, the recoil starter 1 is formed with the pressing portion 1a and the play portion 1b as described above, and the step 1d is provided between them.
(See FIG. 5), and if the step 1d is positioned so as to coincide with the step formed by the engine cover and the tank bracket 4 stacked on the crankcase 2, the through hole 6 of the recoil starter 1 will be The attachment hole 7 of the cover, the attachment hole 8 of the tank bracket 4, and the screw hole 5 formed on the seat surface 2a of the crankcase 2 are exactly aligned.

Therefore, in this state, as shown in FIG. 1 or 2, when the mounting screw B is inserted into the through hole 6 and screwed, the engine cover 3 and the tank bracket 4 are combined with the recoil starter 1. Crankcase 2
It is sandwiched between the seat surface 2a and the seat surface 2a and can be firmly fixed.

For this reason, the lower part of the engine cover 3 having a small second moment of area is also integrated with the engine body side and does not cause the "chattering" phenomenon.

The tank bracket 4 is covered with the recoil starter 1 at the top as shown in FIG.

According to the above construction, the number of mounting screws and the number of mounting holes formed on the crankcase side are reduced, and the number of mounting steps is also reduced.

By the way, in the above embodiment, the step 1d (see FIG. 5) for forming the gaps 10 and 11 is provided on the recoil starter 1 side, but the step 10d is provided on the crankcase 2 side to provide the gap 10 and. 11 may be formed.

[0029]

According to the recoil starter mounting structure of the present invention, since the lower portion of the engine cover having low rigidity is integrally attached to the engine body side by the recoil starter having high rigidity, "chattering" occurs. It is possible to prevent the loosening of the mounting screw.

Since the upper end portion of the tank bracket is covered with the recoil starter, the attaching portion becomes simple in appearance and is excellent in design.

Furthermore, the number of parts and the number of mounting steps can be reduced, and the manufacturing cost of a small engine which is severe in price competition can be reduced.

[Brief description of drawings]

FIG. 1 is an overall front view of a small engine according to an embodiment of the present invention as viewed from a recoil starter mounting side.

FIG. 2 is a cross-sectional view taken along the line I- in FIG.
It is a sectional view taken along the arrow I.

3 is a view taken in the direction of arrows II-II in FIG. 2, showing a seat surface for mounting a recoil starter formed on a side of a crankcase of the engine.

FIG. 4 is a view of an engine cover showing an extended portion as seen from a recoil starter mounting side.

FIG. 5 is a view showing a pressing portion and an idler portion formed on the mounting end surface of the recoil starter on the crankcase side of FIG.
It is an arrow view.

[Explanation of symbols]

 1 ... Recoil starter 1A ... Mounting end surface 2 ... Crankcase 2A ... Side part 2a ... Seat surface 3 ... Engine cover (attached member) 4 ... Tank bracket (attached member) 10 ... Gap 11 ... Gap

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Yasuhiko Nozawa 1-1 Kawasaki-cho, Akashi-shi, Hyogo Kawasaki Heavy Industries, Ltd. Inside the Akashi factory (56) References Flat 2-43435 (JP, U) Showa 58-47215 (JP, Y2)

Claims (1)

(57) [Scope of utility model registration request] 1. A seat surface for mounting a recoil starter is formed on a side portion of an engine crankcase, and an attached member such as an engine cover or a tank bracket is inserted between the seat surface and a mounting end surface of the recoil starter. A recoil starter mounting structure characterized in that a clearance for mounting is formed, and at least a part of an end of an attached member such as an engine cover or a tank bracket is inserted into the clearance and extended so as to be clamped. .