JPH0234433Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a starting device for a model engine.

[Conventional technology]

Since the model engine cannot be started by itself, in order to start it, it is necessary to apply rotational force to the shaft that interlocks with the piston.

As a prior art starter device in which the shaft is manually rotated, there is one shown in FIGS. 6 and 7. This starting device uses a shaft 31 that rotates due to the reciprocating motion of a piston 30.
Attach the pinion 32 to the end of the
A guide plate 33 is disposed below the pinion 2 with a required spacing between it and the outer peripheral surface of the pinion 32. Further, a support plate 34 is arranged on the side of the pinion 32,
The support plate 34 is provided with a vertically long elongated hole 35.

The above-mentioned starting device consists of a rack member 3 shown in FIG.
6 is inserted between the pinion 32 and the guide plate 33 through the elongated hole 35, and the pinion 3 is
The rack member 36 held in mesh with the pinion 2 is instantaneously moved in the longitudinal direction to rotate the pinion 32 and transmit the rotation to the shaft 31.

[Problem that the invention attempts to solve]

By the way, in the above starting device, since the shaft 31 is rotated via the pinion 32,
The rack member 36 is required, and the pinion 3
In order to maintain the rack member 36 and pinion 32 in a meshed state, a guide plate 33 arranged around the pinion 32 is arranged around the rack member 36 and the pinion 32.
3, the pinion 32 rotates and the pinion 32 and shaft 31 are integrated,
The rack member 36 cannot be inserted, and
Since the rotation of the pinion 32 when the rack member 36 is inserted is in the opposite direction to the rotation of the shaft 31 when the engine is running, it is necessary to incorporate a one-way clutch between the shaft 31 and the pinion 32. It takes time to assemble.

Furthermore, if more fuel than necessary is sucked into the cylinder when starting the engine, the shaft 31 and the pinion 32 that engages the shaft through a one-way clutch will not rotate due to liquid compression that occurs inside the cylinder. There is a problem in that the rack member 36 meshed with the pinion 32 is held in the meshed state and cannot be pulled out.

Therefore, this invention solves the above-mentioned disadvantages, does not require special starting tools such as rack members when starting the engine, and has a simple structure that allows the shaft to rotate reliably, causing liquid compression. To provide an engine starting device which allows a starter to be easily removed even in the event of an engine failure.

[Means for solving problems]

In order to achieve the above object, this invention installs a starting wheel at the end of the shaft that rotates in one direction by the reciprocating motion of the piston, and arranges a rotatable clamping roll around the starting wheel,
This clamping roll is supported by the outer circumferential surface of the starting wheel so that its position can be changed between a position where the rod-shaped starter can be clamped and a position where the clamping can be released.

[Effect]

To start and rotate the shaft, move the clamping roll to the clamping release position, insert a rod-shaped starter between the clamping roll and the starting wheel, and change the position of the clamping roll to rotate the clamping roll and the starting wheel. The starter tool is held between the wheel and the starter tool is pulled lengthwise, causing the starter wheel to rotate through contact.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in FIG. 1, a piston 3 is slidably installed inside a cylinder 2 formed in a cylinder block 1, and the reciprocating motion of the piston 3 is caused by the rotational movement of a shaft 5 via a crank mechanism 4. is converted to

The shaft 5 is inserted into a support cylinder 6 provided in the cylinder block 1 and rotatably supported, and the shaft 5 projects outward from the support cylinder 6.
A flywheel 7 is attached to the end of the flywheel.
Further, a starting wheel 8 is attached to the end of the shaft 5.

In the embodiment, the starter wheel 8 is provided separately from the flywheel 7, but the wheels 7 and 8 may be integrally formed and attached to the shaft 5.

The starting wheel 8 has a flange 9 at its end, and its outer peripheral surface is knurled to provide a rough surface in order to improve contact resistance.

At the tip of the support tube 6, there are marks shown in FIGS. 1 and 2.
As shown in the figure, the bracket 10 is installed,
A support plate 12 is attached to a flat arm support surface 11 formed on the outer peripheral side of the bracket 10 with a required spacing therebetween. One end of the arm 13 disposed between the arm support surface 11 and the support plate 12 is rotatably supported by a pin 14 provided on the arm support surface 11. The other end of the arm 13 faces the side of the starting wheel 8, and a clamping roll 15 is rotatably supported at the other end of the arm 13. The outer periphery of this clamping roll 15 is provided with serrations 16 in the axial direction.

The above-mentioned arm 13 is swingable between an upper stopper 17 and a lower stopper 18 provided between the arm support surface 11 and the support plate 12, and when the arm 13 is in contact with the upper stopper 17, it is clamped. The required spacing is created between the roll 15 and the starting wheel 8. This spacing is based on arm 13
gradually becomes wider as it swings downward.

The arm 13 is deflected upward by the tight spring 19 supported by the pin 14 and comes into contact with the upper stopper 17. From this state, when the arm 13 is pushed down against the elasticity of the tight spring 19, the support plate 12 The distal end of the locking spring 20 supported by the locking spring 20 engages with the serrations 16 on the outer periphery of the clamping roll 15, and the arm 13 is held in a downwardly swung position by this engagement.

Note that the tip of the locking spring 20 is connected to the clamping roll 1.
5, the clamping roll 15 is prevented from rotating in one direction, and by rotating the clamping roll 15 in the opposite direction, the clamping roll 15 is rotated in the opposite direction.
The engagement of the engagement spring 20 with the engagement spring 20 can be released.

The starting device shown in the example has the above structure,
To start and rotate the shaft 5, a rod-shaped starter is inserted between the starter wheel 8 and the clamping roll 15, and the starter is inserted between the starting wheel 8 and the clamping roll 1.
The starting tool is moved in the length direction by being held between the starting tool 5 and the starting tool 8, and the starting wheel 8 is rotated by contact rotation with the starting tool.

Here, if the starter is rod-shaped, in this embodiment, as shown in FIG. 5, a core material 22 is provided inside an elastic tube 21.

Now, when the clamping roll 15 is pushed down and the arm 13 is swung downward, the clamping roll 1
The notches 16 on the outer periphery of the locking spring 20 engage with the tip of the locking spring 20, and by this engagement, the clamping roll 15 is held in a downwardly displaced state, and the clamping roll 15 and the starting wheel 8 are held in a downwardly displaced state. A relatively wide spacing can be formed between them.

Therefore, when the starter A is inserted between the starter wheel 8 and the clamping roll 15, and the starter A is pulled slightly in the length direction while it is in contact with the outer peripheral surfaces of the starter wheel 8 and the clamping roll 15, Due to the contact with the starter A, the clamping roll 15 rotates in one direction and is pulled upward, so the engagement between the clamping roll 15 and the locking spring 20 is released, and the arm 1
3 swings upward due to the elasticity of the stiff spring 19. Therefore, the starter A is clamped between the starter wheel 8 and the clamping roll 15, and in this clamped state, by instantly pulling the starter A in the length direction, the starter A is prevented from coming into contact with the starter A. The starting wheel 8 thus rotates and the shaft 5 rotates in the same direction.

In the case of the embodiment, the position of the clamping roll 15 is changeable in the tangential direction of the outer circumference of the starter wheel 8, and the clamping roll 15 is deflected from the clamping release position to the clamping position by contact with the starter A. Alternatively, the clamping roll 15 may be supported so as to be repositionable in the radial direction of the starter wheel 8, and the position may be changed manually.

Further, although a tube is used as the starter, a flexible material such as a rope may also be used.

〔effect〕

As described above, according to this invention, the starting tool inserted between the starting wheel attached to the shaft and the clamping roll is held between them, so that by pulling the starting tool, contact with the starting tool can be avoided. The starting wheel can then be rotated. Therefore, easily available tubes, ropes, etc. can be used as the starter, and the starter wheel can be reliably rotated by pulling the starter.

In addition, the position of the clamping roll can be changed from the position where it clamps the starter to the position where it releases the clamp, so the starter can be easily inserted between the starter wheel and the clamping roll. Since the starting wheel does not sometimes rotate, the starting wheel can be fixed directly to the shaft.
Therefore, it does not require a conventional one-way clutch and is easy to assemble.

Furthermore, since the position of the clamping roll can be changed, if liquid compression occurs inside the cylinder when starting the engine, by changing the position of the clamping roll to the clamping release position, the starting tool can be removed from between the starter wheel and the clamping roll. can be easily pulled out.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the starting device according to this invention, and Fig. 2 is a - of Fig. 1.
3 is a side view taken from the - line in FIG. 2, FIG. 4 is a sectional view showing the operating state of FIG. 2, and FIG. 5 shows an embodiment of the starter. Fig. 6 is a partially cutaway front view showing a conventional starting device, Fig. 7 is a sectional view taken along the - line in Fig. 6, and Fig. 8 is a starter used to start the starting device. It is a front view of a tool. 3... Piston, 5... Shaft, 8... Starting wheel, 15... Clamping roll.

Claims (1)

[Scope of utility model registration request] A starting wheel is attached to the end of the shaft that rotates in one direction by the reciprocating motion of the piston, and a rotatable clamping roll is arranged around the starting wheel, and the clamping roll is connected to the outer circumferential surface of the starting wheel to form a rod shape. A starting device for a model engine in which a starting tool is supported so as to be changeable between a position where it can be clamped and a position where it can be released.