JPS5943496Y2 - recoil starter - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a coil starter for an internal combustion engine.

Conventionally, in a recoil starter having a dog mechanism, a retainer is provided to cover the dog mechanism, and the retainer is rotatably inserted into a shaft provided inside the case body and held by a spring and a set screw to generate friction. This friction was used to move the dogs in and out, but this method had the disadvantage that the friction was not stable because it rotated a heavy retainer, and the springs, set screws, and dogs combined with this were damaged. there were.

The present invention eliminates the above-mentioned drawbacks, and the retainer is fixed to the shaft, and a friction spring made of an elastic wire is attached to the shaft or the shaft part provided on the retainer so that the vicinity of both ends intersect with each other. Then, both ends are bent so as to extend outward, so that the protrusion provided near the tip of the dog is located in the space formed between the two ends, Both ends of the friction spring regulate the protrusion at the tip of the dog to control the dog's insertion and removal.It has a simple structure and a small number of parts.
To provide a coil star that is easy to assemble, inexpensive, and reliable in operation.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In FIG. 1, reference numeral 1 denotes a recoil starter housing, and a shaft 3 is fixed to the inside of the housing.
is rotatably mounted.

On the other hand, a shaft portion 8 is formed at one end of the shaft 3, and a retainer 1 is fixed by a center screw 9.

A concave groove 6 for accommodating the rope 2 is formed on the outer periphery of the reel 5.

Further, a spiral spring 4 is arranged between the reel 5 and the spring 1.

The outer peripheral end of the spiral spring 4 is fixed to the nozzle 1, and the inner peripheral end thereof is fixed to the reel 5, respectively, so that the spiral spring 4 acts to rotate the reel 5 in one direction.

A dog 10 having a substantially crescent shape and having a retaining protrusion 14 in the middle is provided between the retainer 1 and the ring 5.

Further, as shown in FIG. 2, a support protrusion 13 is provided at one end of the dog 10, and protrusions 11 are provided at the other end at intervals in the circumferential direction. is engaged with a hole provided in the reel 5.

A friction spring 15 is wound around the shaft portion 8 of the retainer γ such that a portion near the force end 16 and a portion near the other end 11 cross each other, and both ends 16 . 17 is bent slightly from the radial direction toward the other end to form a space 21 in the middle, and the protrusion 11 attached to the tip of the dog 10 is inserted into the space 21. .

Furthermore, on the engine side, a cup-shaped pulley 19 is connected to the engine crankshaft (not shown),
A plurality of protrusions 20 extending in the axial direction are provided at the tip of the outer periphery.
(Three in the illustrated example) are attached.

Next, the operation of the glue coil starter of the present invention will be explained based on FIGS. 2 to 5.

First, the lever 115 that pulls the rope 2 rotates counterclockwise in the figure, and the tongs 10 move counterclockwise accordingly, but the protrusion 11 attached to the tip of the tong 11 moves counterclockwise in the figure. Since the dog 10 comes into contact with one end 16 and is given a resistance force by the frictional force between the friction spring 15 and the shaft 8, the dog 10 moves from the state shown by the chain line in FIG. 2 to the outside as shown by the solid line. The retaining protrusion 14 is then protruded to the position shown in FIG.
comes to engage with the protrusion 20 of the pulley 19 fixed to the engine side, and when the rope 2 is subsequently bowed, the engagement state between the engagement protrusion 14 and the protrusion 20 is maintained, and the crankshaft is rotated. It is rotated and the engine starts.

At this time, the friction spring 15 has one end 16
is pushed by the protrusion 11 of the dog 10 and rotates counterclockwise together with the reel 5 while slipping at the fitting portion with the shaft portion 8.

Then, when the tension on the rope 2 is released, the reel 5 rotates clockwise in the figure due to the elastic force of the spiral spring 4.
The dog 10 is also rotated clockwise by the support protrusion 13, but the protrusion 11 attached to the tip comes into contact with the other force end 1γ of the friction spring 15, and the friction force between the friction spring 15 and the shaft portion 8 is reduced. Since rotation is prevented by , the protrusion 11 is moved inward, and the dog 1° changes from the state shown by the chain line in FIG. 4 to the state shown by the solid line, and is engaged as shown in FIG. The engagement between the mating projection 14 and the protrusion 20 of the sea IJ 19 is released.

The Lee/I 15 is further rotated clockwise by the spiral spring 4, winds up the rope 2, and returns to its original position.

At that time, the frikkenyong spring 15 is connected to the other end IT.
is pulled by the protrusion 11 of the tongs 10, and rotates together with the reel 5 while slipping between the tongs 10 and the shaft 8.

The advanced features of the Nyorori coil starter of the present invention provide the following effects.

One end of the friction spring 15 exhibiting a resistance force against the protrusion 11 that moves the tongue 10 in and out of the radial direction to engage and disengage the engagement protrusion 14 and the protrusion 20 of the 7-ri 19. 16 and the other end 1γ are bent from the part where they intersect with each other, and when pressed by the protrusion 11 of the tongs 10, the part wrapped around the shaft part 8 forms the surface of the moving part 80. Since the friction spring 15 and the shaft portion 8 tend to increase the pressure contact force against the
The frictional force with the protrusion 11 is maintained normally, and the resistance against the protrusion 11 is ensured.

Furthermore, by bending both ends 16 and 17 of the fluffy cons 19 and 150 so as to be inclined toward the other end in the radial direction, the rule 5 or the dog 10 can be prevented from swinging as the engine is running. When the protrusion 11 of the dog 10 attempts to move outward, both ends 16.1γ move against the protrusion 11.
It is also expected that the engagement protrusion 14 of the tongue 10 is prevented from being hit by the protrusion 20 of the pulley 19 by keeping the engagement protrusion 14 radially inward.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the recoil starter according to the present invention, Figure 2 is a sectional view of the recoil starter according to the present invention.
5 to 5 are explanatory diagrams of the operating state, and FIGS. 3 and 5 are sectional views taken at the position indicated by the arrow 1-1 in FIG. 1. 1...Housing, 2...Rope, 3
...Axis, 4-...Spiral spring, 5...
... Reel, 6 ... Concave groove, 1 ... Retainer, 8 ... Shaft, 9 ... Center screw, 10 ... Dog, 11...protrusion,
13...Support protrusion, 14...Engagement protrusion, 15...Friquency spring, 16.
...--force end, 17...other end, 1
9...Pulley, 20...Protrusion, 21
······space.

Claims (1)

[Scope of utility model registration request] A shaft 3 fixed to the housing 1 has a rotatably held rotor 5, and a retainer 7 fixed to one end of the shaft 3.
A recoil starter is provided with a dog 10 disposed between the retainer γ and the retainer γ. An elastic material is bent into a substantially annular shape and placed separately on the shaft portion 8 provided in the shaft portion 8 or the shaft 3, and both end portions 16 and 17 are crossed with each other, and both end portions 16 and 1γ are bent approximately in the radial direction. A friction spring 15 is wound around the protrusion 11 of the dog 10, and the friction spring 15 is wrapped around the protrusion 11 of the dog 10.
A recoil starter located in a space 21 between 0 and 1 γ ends.