JPS5851271A - Power accumulating type automatic starting apparatus for internal-combustion engine - Google Patents

Abstract

PURPOSE:To facilitate starting of a multi-purpose small engine and to prevent occurrence of troubles in starting the engine, by winding up a spring arranged in a power accumulating box and engaged with a starter shaft by used of superfluous turning force available when the engine is at rest, and turning the stater shaft by releasing the spring at the time of starting the engine. CONSTITUTION:In case of starting an engine that was not yet set into operation, a crank handle 17 is set in place and turned about two times by hand, whereby a spring 15 is wounded up. With subsequent drawing of a starting rod 16 to the outside, a power accumulating box 14 begins to turn. Along with rotation of the box 14, a pawl 6 at first comes into contact with a ratchet plate 9 and compresses a spring 9d for moving the rathet plate 9 in turning direction. Then, a ratchet releasing pin 9b comes into contact with a pawl 10 and turns the same radially outwards, so that the pawl 10 comes out of engagement with a winding ratchet wheel 11. With further turning of the pawl 9, it comes into contact with a starting pulley 2 and turns the same, so that the engine is started. At the time of stopping the engine, on the other hand, the pawl 10 is comes into engagement with the wheel 11 by a spring 10a and turns a starting motor shaft 7, so that the spring 15 is wound up.

Description

[Detailed description of the invention] The present invention relates to improvements in starting devices for internal combustion engines.

FIG. 1 shows a coil-type starting device that is generally used as a starting device for conventional internal combustion engines.

To start the reel 04, grip the rope 05 wound around the reel 04 by the mainspring spring and pull it toward the rope 05a, and the reel 04 will start rotating. Then, the claw 06 of the reel attached to this protrudes and gets caught in the cutout hole 02a provided in the coil pulley 02, causing the crankshaft 01 directly connected to the claw 06 to rotate, igniting the engine and starting it. Complete. When the rope 05 is released from the hand at this time, the Jiro 7'05 is wound up by the winding spring provided in the reel 04, and preparations for the secondary start are made.

The conventional glue coil type starting device as described above has the following drawbacks.

(1) It is a very difficult job for elderly men, women, and women who lack physical strength.

(2) Engines that do not have a retard device for the ignition timing at startup are concerned about injury to arms and fingers due to so-called keratin.

The purpose of the present invention is to solve the above-mentioned problems.

Our goal is to provide a starting device that uses the energy of the starting device and the rotational force that is unnecessary when the engine is stopped, and can start automatically by simply pulling the rod. A ratchet box that is attached to the starter shaft and supports a starter shaft concentric with the crankshaft, and houses a ratchet device that prevents the starter shaft from rotating in the opposite direction to the crankshaft; A power storage box with a mainspring spring fixed at one end to the starter shaft and the other end to the peripheral wall, the same type as the pin that is fixed to the crankshaft and supports the pawl that engages and disengages the retraction ratchet gear provided on the starter shaft. The starting pulley is equipped with a spring that engages the winding ratchet gear during low-speed rotation, and is supported by the starting pulley so that it can be displaced by a predetermined amount in the circumferential direction from the starting pulley through an elongated hole into which the pin of the starting pulley is inserted. a ratchet plate that engages the pawl and separates it from the ratchet gear by relative displacement; a starter rod that is inserted from the baffle plate side into a hole provided in the power storage box to fix the power storage box; and a starter rod that fixes the power storage box. The power storage box is provided with a pawl that engages the ratchet plate and the starting pulley when the power storage box rotates, and the pawl that engages the retraction ratchet gear during low speed rotation when the two engines are stopped causes the engine to start. The starter shaft is interlocked with the gear, and the mainspring spring of the power storage box, which is locked by the starter rod, is wound up to store power, and when one machine is started, the starter rod is separated from the power storage box and the mainspring spring is engaged. The ratchet plate and the starting gear are sequentially interlocked with the claws of the energy storage box, which rotates due to the accumulated force of the power storage box, and the connection between the starting gear and the starter shaft is interrupted by the ratchet plate. The engine is started by the rotation of the starting lever.

in this case.

(1) Accumulating primary starting power by utilizing the unnecessary rotational force of the crankshaft when stopping the engine after finishing work.

(2) Since the mainspring spring is wound in by rotating the starter shaft, the device can be made extremely compact.

(5) (3) The engine shall be started automatically only by operating the starter rod.

There are advantages such as

The present invention can be widely applied to general-purpose small engines.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is a sectional view showing a starter device according to an embodiment of the present invention, and FIG. 3 is a sectional view taken along arrow 2-2 in FIG.

FIG. 5 is a sectional view taken along the line A-A in FIG. 3.

In the figure, a crankshaft 1, a flywheel (not shown), and a starting pulley 2 are directly connected.

The ratchet box 13 is attached to the air guide plate 3, and
supports the starter shaft 7 concentric with the
The return stopper ratchet 12 fixed to the same ratchet 1
The starter shaft 7 is rotated in the direction of the arrow X, but not in the opposite direction.

The winding ratchet gear 11 is fixed to the starter shaft 7 (6) has been done.

The power storage box 14 is rotatably supported by the starter shaft 7, and has a mainspring spring 15 housed inside.

One end 15a of the mainspring spring 15 is fixed to the power storage box 14, and the other end 15b is fixed to the starter shaft 7.

The energy storage box 14 is provided with a plurality of holes 14a on its outer periphery into which starter rods 16 inserted from the baffle plate 3 side can be inserted.

Further, the power storage box 14 has a claw 6 that can be inserted into the notch hole 2a of the starter slit 2.

The pawl 6 has a mechanism similar to the conventionally known pawl 06 shown in FIG.
Due to the action of the auxiliary wheel 14-1 which is pivotally supported on the starter shaft 7 with some rotational resistance, the pawl 6 is configured to protrude when the power storage box 14 starts rotating, and retract when the engine starts. has been done.

The ratchet plate 9 for removing the winding ratchet teeth and the pawl 10 of the wheel 11 has an elongated hole 9c, and a ratchet release pin 9b is embedded in the inner circumference. This ratchet plate 9 has a length of 90 parts and is rotatably attached to the starter sled 2 with a headed pin 9e. Also.

A compression spring 9d is installed between the headed pin 9e and one end 9c' of the elongated hole 9c (see FIG. 5).

The relative positional relationship between the starting sleeve 2 and the ratchet plate 9 is normally such that the headed pin 9e is pressed against the side opposite to the elongated hole end 9c', as shown in FIG.

FIG. 4 shows a spare crank handle 17 that is used to wind up the mainspring spring when a first-shot start fails. This is the socket part 1 that fits into the square head 7a provided at the end of the starter shaft.
7a.

Note that 10a is a ratchet spring that is used to engage the pawl 10 with the winding ratchet gear 11.

The functions and effects of the above configuration will be described.

When starting an engine that has never been operated, attach the crank handle 17 to the square head 7a of the starter shaft 7 and manually turn it about 2 turns in the same direction as the engine rotation (direction of arrow X in Figure 3). . At this time, since the starter rod 16 is inserted into the notch hole 14a provided in the power storage box 14, the mainspring spring 15 built in the starter rod 16 is wound up.

To prevent the mainspring spring 15 from returning, use the return prevention ratchet 12.
The claw 13a takes charge of this, and the accumulation of energy required for starting is now complete.

To start the engine, when the starter rod 16 is pulled out, the power storage box 14 begins to rotate due to the repulsive force of the mainspring spring 15, and the pawl 6 attached to it pops out and is attached to the ratchet plate 9 and the starting gooey 2, respectively. Cutout window 9a
and enters 2a.

The pawl 6 first contacts the ratchet plate 9, compresses the spring 9d, and first moves the ratchet plate 9 in the rotational direction. Then, the ratchet release pin 9b comes into contact with the pawl 10 and the same type 1
0 is rotated in the outer circumferential direction (in the direction of arrow Y) to insulate it from the ratchet gear 11.

When the pawl 6 further rotates, it comes into contact with the starter sleeve 2 and rotates it. Since the starting engine 2 is directly connected to the crankshaft 1, the engine starts.

When the starter rod 16 is released from the hand after starting, it is returned to its original position by the return spring 16a and inserted into the cutout hole 14a of the power storage box 14 (9), and the power storage box 14 is locked to the baffle plate 3. At this time, the pawl 10 is opened outward due to centrifugal force due to the high speed rotation of the engine, so the retraction ratchet gear 1
There is no interference with 1.

Next, a method of accumulating power using the rotational force of the engine will be explained. When you have finished working on the engine and shut it down,
As the rotation speed gradually decreases, when the rotation speed drops slightly below the operating speed range, the pawl 10 engages the retraction ratchet gear 11 by the action of the spring 10a, which is set in advance to overcome the centrifugal force of the pawl 10. The starter shaft 7 is rotated, and the mainspring spring 15 is wound up. When the engine is completely stopped, the detent ratchet 12. The sister starter shaft 7 is set by the pawl 13a and stores the energy required for the primary starting. From the next start, there is no need to manually wind the starter rod 1.
All you need to do is step 6. However, if the engine fails to start, manual winding using the crank handle 17 is required.

As described above, the present invention does not have the effect of automatically starting the engine simply by operating the starter rod.

(10) The consumption of labor shown in the conventional example is prevented, labor saving is realized, and safety is improved.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing a conventional glue coil type starting device, Figure 2
The figure is a sectional view showing a starter device according to an embodiment of the present invention, and FIG. 3 is a sectional view taken along arrow 2-2 in FIG. Figure 4 is an explanatory diagram showing the crank handle, Figure 5 is the third
It is a sectional view taken along the line A-A in the figure. 1... Crankshaft, 2... Start-up, 3... Wind guide plate. 6... Power storage box claw, 7... Starter shaft, 9... Ratchet plate, 9c... Elongated hole, 9e... Head pin, 1
0...nails. 10a...Spring, 11...Involving ratchet gear, 1
3... Ratchet box,] 4... Power storage box, 15...
All springs are 16...starter rods. (11)

Claims (1)

[Claims] 1. A ratchet box that is attached to the baffle plate, supports a starter shaft concentric with the crankshaft, and houses a ratchet device therein that prevents the starter shaft from rotating in the opposite direction to the crankshaft;
A power storage box that is rotatably supported on the starter shaft and includes a mainspring spring that has one end fixed to the starter shaft and the other end to the peripheral wall, and a retraction ratchet that is fixed to the crankshaft and provided on the starter shaft. The starting pulley is equipped with a spring that supports the pawl that engages and disengages from the gear, and a spring that engages the winding ratchet gear during low speed rotation, and the elongated hole into which the pin of the starting pulley is inserted. a ratchet plate that is supported on the starting axis so as to be able to be displaced by a predetermined amount in the circumferential direction and that causes the mold to separate from the winding ratchet gear by relative displacement;
A starter rod that is inserted into a hole provided in the power storage box from the baffle plate side and fixes the power storage box, a ratchet plate that is provided in the power storage box, and is activated by the rotation of the power storage box, and A power accumulator claw that engages with the gear wheel is provided, and the starter shaft is interlocked with the starting gear by the claw that engages with the winding ratchet gear during low speed rotation when the two engines are stopped, and the starter shaft is engaged with the starter rod. The mainspring spring of the stopped power storage box is wound up to store power, and when one machine starts, the starter rod is separated from the power storage box and the power storage box rotates by the stored power of the mainspring spring. The ratchet plate and the starting gear are sequentially interlocked with the pawl of the power storage box, and the ratchet plate interrupts the connection between the starting gear and the starter shaft, and the engine is started by rotation of the starting gear. A power storage type automatic starting device for an internal combustion engine, characterized in that: