JPH08303334A - Attaching structure of recoil starter - Google Patents

Abstract

PURPOSE: To easily and strongly attach and fix a recoil starter to a fan cover with high positioning accuracy. CONSTITUTION: A seal case 26v composed of cylindrical parts 25a and 25b for positioning a fan cover 20 and a starter case 1 is provided in an attaching part between the fan cover 20 made of resin and the starter case 1 made of resin. A plastic fastener 27 is fitted by pressure in the center position of the seal case 26 and the starter case 1 is attached to the fan cover 20 in the cylindrical parts 25a and 25b in a radial direction, being strongly held by the plastic fastener 27. A reel 3 is freely rotatably attached to the starter case 1 attached to the fan cover 20, and by pulling out a rope 4 taken up in the reel 3 by means of the restoring force of a spring 5, the reel 3 is rotated and an internal combustion engine is started.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for mounting a recoil starter on a fan cover.

[0002]

2. Description of the Related Art A recoil starter of this type is known from Japanese Utility Model Publication No. 231576, and the description will be given with reference to FIG. 2, in which a shaft 2 is fixed to a shaft center position of a starter case 1. A reel 3 is rotatably attached to the shaft 2, and a rope 4 is wound around the recess provided on the outer periphery of the reel 3 by the restoring force of the mainspring 5. A ratchet 6 is attached to the reel 3, and a pin 8 is fixed at an intermediate position of the ratchet 6, and the ratchet 6 is movably positioned between an inclined surface and a protruding surface formed near the peripheral edge of the reel 3. , Attached to the reel 3. A friction plate 9 is attached to the shaft 2, and the friction plate 9 is formed with a guide portion for guiding the pin 8 to move the ratchet 6 in and out in the radial direction. On the other hand, on the engine side,
A pulley 13 that is connected to the engine is provided, and a recess is formed at the tip of the outer periphery thereof. The peripheral portion of the starter case 1 is fixed to the fan cover 20 with bolts 21 and nuts 22.

In the conventional recoil starter having such a structure, when the rope 4 is pulled out from the stopped state against the restoring force of the mainspring 5, the friction plate 9 is maintained in the stopped state by the friction with the shaft 2. , The reel 3 and the ratchet 6 rotate. For this reason, the pin 8 of the ratchet 6 is guided by the guide portion of the friction plate 9, the ratchet 6 projects in the radial direction and engages with the recess of the pulley 13, and the engine starts. Then, when the rope 4 is released with the engine started, the restoring force of the mainspring 5 causes the reel 3 to rotate in the opposite direction, the rope 4 is rewound, and the ratchet 6 returns to the original position.

[0004]

In the conventional recoil starter described above, since the peripheral portion of the starter case 1 is fixed to the fan cover 20 with the bolts 21 and the nuts 22, the engine start by the recoil starter is repeated. However, the tightening of the bolt 21 and the nut 22 may loosen over time, and the recoil starter may shake when the rope 4 is pulled out, and the engine may not be started stably and smoothly.

The present invention has been made in view of the present situation of mounting the recoil starter to the fan cover as described above, and an object thereof is to firmly mount and fix the recoil starter to the fan cover with high positioning accuracy. It is to provide a mounting structure of a recoil starter capable of performing the above.

[0006]

In order to achieve the above object, the present invention provides a resin starter case mounted on a resin fan cover, to which a reel is rotatably attached, and the reel having a mainspring. In the attachment structure of the recoil starter for starting the internal combustion engine by pulling out the rope wound by the restoring force to start the internal combustion engine, in the attachment portion of the fan cover and the starter case. A spigot for positioning the fan cover and the starter case is provided, and a plastic fastener is press-fitted at a central position of the spigot, and the starter case is attached to the fan cover. Is.

[0007]

As described above, according to the present invention, a spigot for positioning the fan cover and the starter case is provided at the mounting portion between the resin fan cover and the resin starter case, and the plastic fastener is provided at the center position of the spigot. The starter case and the fan cover are firmly attached to each other by the spigot in the radial direction and the axial direction by the plastic fastener. In this way, the reel is rotatably attached to the starter case attached to the fan cover, and by pulling out the rope wound on the reel by the restoring force of the mainspring, the reel is rotated and the internal combustion engine is started. Let

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a cross-sectional explanatory view showing the configuration of the present embodiment, and the same parts as those in FIG. 2 already described are given the same reference numerals.

In this embodiment, the starter case 1 and the fan cover 20 are made of resin, and as shown in FIG. 1, the shaft portion 2A has a boss portion 2a formed at the center thereof.
A rivet 24 made of metal or hard resin is formed in the boss portion 2a and has a lower hole 2b, and a head portion 21 having a wide diameter and a shaft portion 23 having a ring-shaped protrusion 22 formed on a peripheral surface thereof.
Is driven into the pilot hole 2b and the friction plate 9
Has been fixed. Further, in this embodiment, a cylindrical portion 25a for positioning the recoil starter in the radial direction is formed on the peripheral portion of the starter case 1, and the fan cover 20 is formed with a cylindrical portion 25b that fits with the cylindrical portion 25a. ,
The cylindrical portion 25a and the cylindrical portion 25b constitute a spigot 26 for positioning. Then, the cylindrical portions 25a, 25
b is fitted to each other, and the plastic fastener 27 is press-fitted to the center position of the b to attach the starter case 1 to the fan cover 20.

The plastic fastener 27 has a wide-diameter head portion 27a located on the peripheral edge of the cylindrical portion 25a in a press-fitted state.
And an engaging claw 27b located on the peripheral edge of the cylindrical portion 25b, the distance between the contact surface of the head 27a with the cylindrical portion 25a and the engaging portion of the engaging claw 27b with the cylindrical portion 25b. Is set to be slightly shorter than the distance between the peripheral edge of the cylindrical portion 25a and the peripheral edge of the cylindrical portion 25b, and the plastic fastener 27 strongly presses the cylindrical portion 25a and the cylindrical portion 25b in a press-fitted state. In the press-fitted state of the plastic fastener 27, the starter case 1 and the fan cover 20 are radially positioned and firmly held and fixed by the cylindrical portions 25a and 25b, and the plastic fastener 27 causes the starter case 1 and the fan cover 20 to be firmly held. 20 is strongly held and fixed in the axial direction. The configuration of the other parts of this embodiment is the same as that of the conventional recoil starter already described with reference to FIG.

In this embodiment, like the conventional recoil starter, when the rope 4 is pulled out against the restoring force of the mainspring 5 from the stopped state, the friction plate 9 moves to the shaft 2
Due to the friction between the reel 3 and the ratchet 6, the reel 3 and the ratchet 6 rotate. Therefore, the ratchet 6 is guided by the guide portion 9a of the friction plate 9, protrudes in the radial direction, engages with the concave portion of the pulley, rotates, and the engine starts. Then, when the rope 4 is released with the engine started, the restoring force of the mainspring 5 causes the reel 3 to rotate in the opposite direction, the rope 4 is rewound, and the ratchet 6 returns to the original position.

In this embodiment, the plastic fastener 27 is used.
In the press-fitted state of No. 2, by the cylindrical portions 25a and 25b,
The starter case 1 and the fan cover 20 are positioned in the radial direction and strongly held and fixed. The starter case 1 and the fan cover 20 are fixed by the plastic fasteners 27.
And are strongly held and fixed in the axial direction, so the rope 4
Even if you repeat the starting operation of the engine by pulling out
The starter case 1 is not loosely attached to the fan cover 20, and it is possible to continue a stable and smooth engine start.

[0013]

According to the present invention, a spigot for positioning the fan cover and the starter case is provided at the mounting portion of the resin fan cover and the resin starter case, and the plastic fastener is provided at the center position of the spigot. And the starter case is attached to the fan cover, and the starter case is precisely positioned and firmly held by the spigot in the radial direction and the plastic fastener in the axial direction. Installation is extremely easy, and the recoil starter is firmly attached to the fan cover with high positioning accuracy, and the starter case and fan cover may loosen over the years due to repeated engine starting operations. Without, stable and smooth engine starting operation can be continued.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view showing the configuration of an embodiment of the present invention.

FIG. 2 is an explanatory cross-sectional view showing the configuration of a conventional recoil starter.

[Explanation of symbols]

 1 Starter Case 2a Boss 2b Lower Hole 3 Reel 4 Rope 5 Spring 6 Ratchet 9 Friction Plate 9a Guide 20 Fan Cover 25a, 25b Cylindrical 26 Inlay 27 Plastic Fastener

Claims (1)

[Claims] 1. A reel is rotatably attached to a resin starter case attached to a resin fan cover, and the reel wound by the restoring force of a mainspring is pulled out from the reel to thereby draw the reel. In a mounting structure of the recoil starter for rotating the internal combustion engine to the fan cover, in a mounting portion of the fan cover and the starter case,
A recoil starter is provided in which a spigot for positioning the fan cover and the starter case is provided, and a plastic fastener is press-fitted at a central position of the spigot to attach the starter case to the fan cover. Mounting structure.