JPS581657Y2 - Vibration isolation device for recoil starters for internal combustion engines - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vibration isolating device for a recoil starter installed in an internal combustion engine such as a general-purpose engine.

In order to simplify the starting operation, many internal combustion engines such as general-purpose engines are equipped with a so-called "recoil starter" of an automatic winding type that does not require winding the starting rope every time.

Conventionally, this recoil starter was mounted directly on the side of the engine body, so it received vibrations from the engine body, and since the button was pressed under continuous high vibration, there was an inconvenience that the internal mechanism generated noise. In addition, there was a problem in that vibrations caused cracks in the attachment part to the engine body, resulting in damage to the attachment part.

Such damage often occurs, especially in cold regions where the flange of the recoil starter is frozen, making the metal brittle and prone to cracking.

The present invention was created with the aim of solving this problem, and in order to prevent the coil starter from being exposed to vibrations when installed on the internal combustion engine body, there is a button on the mounting part to isolate vibrations from the engine body. At the same time, the tightening is applied to both the mounting surface of the flange part where stress is concentrated and the rising part of the flange consisting of the bent part and its vicinity from this mounting surface. It is an object of the present invention to provide a vibration isolating device for a coil souter that is protected against freezing and the like, is less prone to cracking, and has a reinforcing effect.

By the way, when an adherend is fastened to a fixed object with bolts or the like, an example of prior art in which an elastic member is interposed between these mounting surfaces or at the fixing part is disclosed in Japanese Utility Model Application No. 1986-7.
No. 2203 (Utility Model Application No. 1630, 1977), Utility Application No. 1630
No. 96017 (Utility Model Application No. 51-23691)
There are many things that can be seen in the microfilms of the details of the specification buttons and drawings attached to each application of No. 9-131319 (Utility Model Application No. 51-58283).

FIG. 1 shows a general-purpose engine equipped with a recoil starter, in which numeral 1 indicates the engine body, and numeral 2 indicates the coil starter attached thereto.

This recoil starter 2 has a reel 4 inside the casing 3, as shown in FIGS. 2 and 3 on an enlarged scale.
, a mainspring 5, a starter cam 6, and other glue coil operating parts are installed inside the reel 4, and a souter rope 7 is wound around the reel 4, and the outer end of the rope 7 is led out of the casing 3 and a grip 8 is attached to it. ing.

By holding this grip 8 and pulling the starter rope i, the engine main body 1 is started, and at the same time, the recoil actuating section operates to rotate the reel 4 in one direction and move the starter rope 7 to zero. The configuration and operation of these components are similar to those of conventional systems, so detailed explanation thereof will be omitted.

With this configuration, the coil starter 2 is connected to the engine body 1.
The casing 3 is provided with a flange portion 10 having a mounting hole 9 on the periphery of the opening side of the casing 3. This flange portion 10 is placed on the mounting surface of the engine body 1, and a bolt ( (not shown), the recoil starter 2 is integrally attached to the engine body 1 side.

For this installation, in order to isolate vibrations from the engine body 1, the mounting flange 10 of the casing 3 is coated with a vibration isolating material 11 made of synthetic resin or the like by means of dipping, for example. In particular, for the vibration isolating material 11, tightening is performed from the mounting surface 10a of the flange portion 10 where stress is concentrated, and from the mounting surface to the bent portion button and the vicinity thereof, over the rising portion 10b of the flange portion 10. It is coated so as to cover both the inside and outside surfaces.

In addition to synthetic resin, the vibration damping material 11 to be coated can also be made of, for example, a rubber material. In this case, as shown in FIG. The vibration isolating material 11' is attached by baking, and the rising portion 10b is coated with synthetic resin.

Of course, both the mounting surface 10ab and the rising portion 10b may be integrally coated with a rubber-based vibration damping material.
In this case, it is desirable to cover the rising portion 10b with a hard rubber material having high Ml resistance.

If the flange portion 10 of the casing 3 is coated with a vibration isolating material over the mounting surface 10a1, the bent portion from the mounting surface 10a, and the rising portion 10b in the vicinity thereof, vibration is absorbed by the vibration isolating material 11. This action isolates vibrations from the engine body 1 to the coil starter 2 side, which has a so-called vibration-proofing effect, and also reduces the impact generated on the recoil starter side during the recoil operation.
In addition to preventing the shock from being transmitted to the engine body and having a shock absorption effect during so-called recoil operation, the rising portion 10b consisting of the mounting surfaces 10a and D of the flange portion 10 and the bent portion from the mounting surface 10a and the vicinity thereof, Vibration isolation material 11
The coating layer protects against freezing, prevents deep cracks from forming, and has a reinforcing effect.

Thus, according to the present invention, the vibrations received by the recoil starter 2 are significantly reduced by isolating the vibrations from the engine body 1 to the recoil starter 2 side, so that the generation of noise is eliminated, and at the same time, the vibration caused by the installation It is possible to prevent cracks from occurring in the flange portion.

Moreover, in addition to its anti-vibration effect, the mounting flange part 1
0 is protected against freezing by the coating layer of the vibration isolating material 11, and has a reinforcing effect that prevents cracks from forming, so it completely prevents damage to the mounting part caused by vibration, which was a problem in the past when used in cold regions. can be resolved.

Furthermore, in addition to the above-mentioned effects, especially according to the present invention, the vibration isolating material 1
1 is coated on both the inner and outer surfaces of the mounting surface 10a of the flange portion and the rising portion 10b that extends from the bent button and the vicinity of this mounting surface.
The coating effect of 0a is that even if the mounting bolts rust, it can be prevented from rusting on the mounting surface 10a, and the coating effect of the above-mentioned rising portion 10b of the casing is that the coating layer protects the coil casing side from the engine body. Since it has the function of changing the frequency of vibrations transmitted to the engine and mitigating resonance, it is possible to reduce the chattering noise of the recoil casing. Effects such as being able to significantly reduce vibrations and noise generation can be obtained.

[Brief explanation of drawings]

Figure 1 is a front view showing an example of an internal combustion engine equipped with a beam coil starter; Figure 2 is an enlarged front view of the beam coil starter;
FIG. 3 is a sectional view taken along the line ■--■ in FIG. 2, and FIG. 4 is a sectional view showing another embodiment of the main part of the present invention. 1... Engine body, 2... Recoil starter, 3
...Casing, 4...Reel, 5...Spring, 6...Starter cam, 7...Starter rope, 8
...Grip, 9...Mounting hole, 10...Flange part,
10a...Mounting surface, 10b...Rising portion, 11...Vibration isolating material.

Claims (1)

[Scope of utility model registration request] A recoil starter to be mounted on an internal combustion engine, in which a flange portion having a mounting hole is formed on the opening side periphery of a casing with a concave cross section that houses a recoil operating portion, and the flange portion is brought into contact with a mounting surface of the internal combustion engine. The recoil starter is attached to the internal combustion engine by tightening the bolts inserted into the mounting holes, and the recoil starter is attached to the mounting surface of the flange section, the bent part from the mounting surface, and the vicinity thereof. 1. A vibration isolating device for a recoil starter for an internal combustion engine, characterized in that a vibration isolating material made of synthetic resin, rubber, etc. is coated on both the inner and outer surfaces of the flange, including the rising portion thereof.