JP2003254204A - Recoil starter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a new type recoil starter device having an one-way clutch attached to a crank shaft of an internal combustion engine and improving a portion to be installed to the engine by irrotational fitting of the one way clutch and a bearing hole of a reel. <P>SOLUTION: The recoil starter device has the one-way clutch attached to the crank shaft of the internal combustion engine, connects the one-way clutch to a recoil rope reel and starts the engine by rotating the recoil rope reel. In the recoil starter device, a center shaft is projectingly formed on the recoil rope reel, and a slip-off stopping portion is formed in an end of the center shaft. The device has a starter case attachable to the engine side. A center hole is opened at a central position of a ceiling of the starter case. The center shaft is pressingly inserted into the center hole, and the slip-off stopping portion is rotatably engaged with the hole. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recoil starter device for use in an internal combustion engine, and more specifically, a one-way clutch is attached to a crankshaft of a small internal combustion engine for radio control and the like, and the one-way clutch and a bearing hole of a reel are provided. The present invention relates to an improvement of a recoil starter device of a type that is mounted on an internal combustion engine by non-rotatable fitting, and more specifically to an improvement of a mounting structure of a reel for a recoil rope to a starter case.

The present invention also includes a one-way bearing in the one-way clutch.

[0003]

2. Description of the Related Art Heretofore, as a recoil starter device of this type of small internal combustion engine for radio control, for example, the following structure has been known.

A pair of flanges 3 and 4 forming rope grooves 5 are formed on the outer circumferences of both ends of a cylindrical bearing 2 having a hexagonal shaft hole 1, and a spring winding shaft 27 is integrally formed on one end of the center. The provided recoil rope reel 6 is made of a hard synthetic resin material, a rope through hole 7 is formed in one of the collars 3, and the base end portion of the recoil rope 8 is inserted into this, and the rope groove 5 at the base end portion is inserted.
A knot ball 9 having a diameter larger than the diameter of the rope passage hole 7 is provided at a position outside the side wall of the recoil rope 8 so as to prevent the recoil rope 8 from winding in the rope groove 5 and the outer surface of the recoil rope reel 6. The spring chamber 22 is provided in the
The recoil spring 23 into the starter case 16 and then the reel 6 into the starter case 16;
The outer end of the recoil spring 23 is locked to the outer circumference of the spring chamber 22, and the inner end of the recoil spring 23 is locked to the spring winding shaft 27 provided in the starter case 16, and the reel 6 is pulled out to the opening surface of the starter case 16. The blocking member 28 for blocking the above is attached in a state in which the blocking member 28 blocks a part of the opening surface to interfere.

[0005]

The recoil starter device of the type described in the above-mentioned prior art has the following problems because it has the above-mentioned configuration. In other words, a, the blocking member 28 is required only to function only for transporting the components before being attached to the engine, and the number of components is large as a whole. b. Since there are the blocking members 28, the number of steps is increased and the assembly is performed.
/ Hard to disassemble. c, The blocking member 28 comes off to cause so-called badness. d. Not suitable for cost reduction due to the large number of parts. e. The recoil rope reel 6 is of a type that is rotated by being guided by the peripheral wall of the spring chamber 22 and does not have a shaft center of rotation and is not stable.

An object of the present invention is to provide a novel recoil starter device which has been devised to solve the above-mentioned problems and other devises.

[0007]

In order to achieve the above-mentioned object, a storage type starter device according to the present invention has a one-way clutch attached to a crankshaft of an internal combustion engine, and the one-way clutch is connected to a recoil rope reel. In a recoil starter device that starts an internal combustion engine by rotating a reel for a recoil rope, a center shaft is projected on the reel for a recoil rope, a retaining portion is provided at the tip of the center shaft, and it can be mounted on the engine side. A starter case, a center hole is opened at the center of the ceiling surface of the starter case, the center shaft is pushed into the center hole, and the retaining portion is rotatably locked in the hole. Is.

The center shaft has a slit, and the tip of the center shaft has a triangular protrusion-shaped retaining portion having an umbrella shape that becomes thinner toward the tip or an inclination that becomes lower, and the center hole has a center shaft. The hole is larger than the shaft diameter and smaller than the maximum diameter portion of the retaining portion.

Further, a spring chamber is provided in the top surface of the starter case, a recoil spring is inserted therein, and the inner end hook of the recoil spring is locked to the slit of the center shaft.

[0010]

The embodiment shown in the drawings is a recoil rope in which a pair of collars 3 and 4 forming rope grooves 5 are integrally provided on the outer circumference of both ends of a cylindrical bearing portion 2 having a hexagonal shaft hole 1. The reel 6 is made of a hard synthetic resin material having a slight elasticity, and a rope through hole 7 is formed in one of the collars 3, and the base end portion of the recoil rope 8 is inserted into this, and the rope at the base end portion is inserted. A knot ball 9 having a diameter larger than the diameter of the rope passage hole 7 is provided at a position outside the side wall of the groove 5 to prevent the knot ball 9 from coming off, and the recoil rope 8 is wound inside the rope groove 5.

Further, a short tubular spring winding shaft / center shaft 11 is integrally projectingly provided on the outer end surface of the bearing portion 2, and one or two spring winding shaft / center shaft 11 has an outer end edge surface. A deep slit 12 of not less than this number is cut so that the diameter can be reduced, and an umbrella-like retaining portion 13 that becomes thinner toward the front is integrally provided at the tip of the spring winding shaft / center shaft 11 so as to project integrally. .

Separately from this, a dish-shaped starter case 16 having a mounting hole 15 for the fan case 14 on the engine side at the opening edge is made of a hard synthetic resin material.
A center hole 19 is formed in the center of the ceiling surface 17 of the starter case 16 and is larger than the outer peripheral diameter of the spring winding shaft / center shaft 11 and smaller than the outer peripheral diameter of the umbrella-shaped engaging portion 13, and the outer peripheral wall of the starter case 16 is also formed. Ceiling surface 1 at 20
7, a step portion 21 is formed at a position close to 7, and a spring chamber 22 is provided,
The recoil spring 23 is inserted into the spring chamber 22 in a direction in which the recoil spring 23 applies a rewinding force to the recoil rope 8, and in the loaded state, the recoil spring 23 is inserted.
The spring winding shaft / center shaft 11 is pushed into the center hole 19 from the inner side through the center space 24 of the winding, and thus the outer peripheral edge portion 25 of the umbrella-shaped retaining portion 13 is inserted into the center hole 19. It is locked to the outer surface of the cut edge.

In the above embodiment, the one-way clutch 32 is attached to the crankshaft 31 of the internal combustion engine, and the one-way clutch 32 and the bearing hole 1 of the reel 6 for the recoil rope are non-rotatably fitted to each other. Is used by being attached to the crankshaft 31.

Although the drawing hole of the recoil rope 8 and the hooking portions at the inner and outer ends of the recoil spring 23 are not shown in the drawing, the drawing hole is formed in the outer peripheral wall 20 of the starter case 16 and in the coil spring 23. Hooking portions at both outer ends are provided on the bearing portion 2 and the starter case 12.

In the above embodiment, the starter case 16 is used.
A spring chamber 22 is provided in the top surface part 17 of the device, a recoil spring 23 is inserted in the spring chamber 22, and an inner end hook (not shown) of the recoil spring 23 is engaged with the slot 12 of the center shaft 11 in the spring chamber 22. Although it is configured to be stopped, a spring chamber is provided on the outer surface of the reel and a recoil spring is inserted into the spring chamber. The outer end of the recoil spring 23 is engaged with the outer circumference of the spring chamber and the inner end of the recoil spring is engaged with the starter case. It is also possible to adopt a configuration in which it is stopped.

[0016]

In the recoil starter device according to the first aspect of the present invention, as described above, the one-way clutch is mounted on the crankshaft of the internal combustion engine, the one-way clutch is connected to the recoil rope reel, and the recoil rope reel is rotated. In the recoil starter device for starting the internal combustion engine by the above, a center shaft is projectingly provided on the recoil rope reel, a retaining portion is provided at the tip of the center shaft, and a starter case attachable to the engine side is provided, A center hole is formed at the center of the ceiling surface of the starter case, and the center shaft is pushed into the center hole to rotatably lock the retaining portion in the hole. It does not have the blocking member 28 as described above, and eliminates the above problems such as a to d. In addition, in the present invention, the center shaft has a function of eliminating the blocking member 28, a function of mounting a reel for a recoil rope to a starter case, a function of winding a recoil spring, and a coil for a recoil rope. The function as a rotation center axis of the reel and the function of improving the rotation stability of the reel for the recoil rope are achieved by one product, which enables simplification of the configuration and assembly, and the effect is extremely large. It will be.

In the recoil starter device according to the second aspect of the present invention, the center shaft has a slit, and the tip thereof has an umbrella-like shape that becomes narrower toward the tip or a triangular projection-shaped retaining portion having a slope that becomes lower. Since the center hole is a hole larger than the shaft diameter of the center shaft and smaller than the maximum diameter part of the retaining portion, the recoil rope reel is attached to the starter case by pushing the center shaft into the center hole. It can be done quickly and simply and is suitable for increasing production efficiency.

Further, in the recoil starter device according to the third aspect, a spring chamber is provided in the top surface of the starter case, and the recoil spring is inserted into the spring chamber, and the inner end hook of the recoil spring is slit into the spring chamber. Since the center shaft has a slit, it has a function of reducing the diameter of the center shaft that prevents the center shaft from coming out of the center hole, as well as a function of locking the inner end hook of the recoil spring. This is achieved and is extremely preferable for simplifying the structure.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an exploded sectional view of the same.

FIG. 3 is a cross-sectional view showing a conventional example.

[Explanation of symbols]

1 shaft hole 2 Bearing member 3 Tsuba 4 Tsuba 5 rope groove 6 reel 7 rope through hole 8 Recoil rope 9 knot 11 Spring winding shaft and center shaft 12 pickpocket 13 retaining points 14 fan case 15 mounting holes 16 starter case 17 Ceiling surface 19 Center hole 20 Outer wall 21 steps 22 Spring chamber 23 Recoil spring 24 Central space 25 outer peripheral edge 27 Spring winding shaft 28 Blocking member 31 crankshaft 32 one-way clutch

Claims (3)

[Claims] 1. A recoil starter device for starting an internal combustion engine by attaching a one-way clutch to a crank shaft of an internal combustion engine, connecting the one-way clutch to a reel for a recoil rope, and rotating the reel for a recoil rope to start the internal combustion engine. A center shaft is provided on the reel for projection, a retaining portion is provided at the tip of the center shaft, and a starter case that can be mounted on the engine side is provided, and a center hole is opened at the center position of the ceiling surface of this starter case. A recoil starter device characterized in that the center shaft is pushed into the center hole and the retaining portion is rotatably locked in the hole. 2. The center shaft has a slit, and has a triangular protrusion-shaped retaining portion at the tip thereof, which has an umbrella shape that narrows toward the tip or an inclination that decreases, and the center hole has a center hole. 2. The recoil starter device according to claim 1, wherein the recoil starter device is a hole that is larger than the shaft diameter and smaller than the maximum diameter portion of the retaining portion. 3. A spring chamber is provided in the top surface of the starter case, a recoil spring is inserted therein, and an inner end hook of the recoil spring is engaged with the slit of the center shaft. The recoil starter device described.