JPS636460Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a recoil starter device used for starting an engine.

Conventionally, this type of starter device is known to include a rope reel and a cylindrical pulley connected to the crankshaft in an outer starter case attached to the crankcase. In this case, there is no seal between the starter device and the crankcase to which it is attached, and for example, water or dust that enters the starter case through the rope insertion hole provided in the starter case may enter the crankcase. It had the inconvenience of intrusion. In order to eliminate this inconvenience, it is conceivable to provide a seal member between the starter case and the pulley, but the seal member may be damaged by continuous rotational friction of the pulley, making it difficult to maintain good sealing performance. This results in the inconvenience of not being able to maintain it.

The present invention aims to provide a recoil starter device having good and durable sealing properties in order to eliminate such inconveniences. all around it,
An annular seal plate is provided that extends inside the reel arrangement portion, and a seal member that abuts the reel is provided on the inner peripheral edge of the seal plate.

The present invention will be explained below with reference to the drawings.

In the drawings, reference numeral 1 indicates a crankcase, and a starter case 3 is attached to the outside in the axial direction of a crankshaft 2 housed in the crankcase 1, and a rope 5 is attached to the outer periphery of the central shaft 4 fixed to the case 3.
A rope reel 7 is wound around the crankshaft 2 and has a recess 6 on the crankshaft 2 side.
A cylindrical pulley 8 inserted into the recess 6 of the reel 7 is connected to the reel 7, and a support shaft 9 protruding from the reel 7 is connected to the reel 7.
A ratchet 10 is pivotally supported so as to be able to swing freely in the radial direction, and a mainspring spring 11 is connected to the reel 7. When the rope 5 wound around the reel 7 is pulled, the reel 7 is pulled from the spring 11. Accordingly, the ratchet 10 is swung radially outward and brought into contact with the pulley 8.

To explain this in more detail, one end of a friction spring 13 that is frictionally engaged with a friction disk 12 fixed to the central shaft 4 is engaged with the tail end of the ratchet 10, and the ratchet 10 is normally held in place. The spring 13 is biased radially inward and released from the pulley 8, and when the reel 7 rotates, the rotation delay of the spring 13 due to contact friction with the friction disk 12 causes the latch 10 to hit the pulley 8. Swinging is applied to the outside in the radial direction of contact.

Then, a plurality of engagement holes 14 are formed in the pulley 8 so as to be located on the contact locus of the ratchet 10, and when the ratchet 10 slides into contact with the pulley 8 and matches any of the engagement holes 14, The ratchet 10 is inserted into the engaging hole 14 and engaged with the engaging hole 14, so that starting rotation of the pulley 8 and the crankshaft 2 connected thereto is applied via the ratchet 10. did.

In addition, in the drawing, 15 indicates a water drain hole of the starter case 3.

Although the above is not particularly different from the conventional one described above, according to the present invention, an annular shape is provided at the joint 16 between the crankcase 1 and the starter case 3 over the entire circumference and extending inside the area where the reel 7 is disposed. A seal plate 17 is provided, and a seal member 18 that contacts the reel 7 is provided on the inner peripheral edge 17a of the seal plate 17. In addition, the one shown in the first diagram is
The sealing member 18 is brought into contact with the rim 19 of the reel 7, and is placed at an appropriate location such as the flange 20 of the reel 7 as shown in the second figure, or the hub 21 of the reel 7 as shown in the third figure. It can come into contact with you.

According to this, even if water or dust enters the starter case 3, the seal plate 17
The reel 7 is well sealed by the seal member 18 to prevent it from entering the crankcase 1, and furthermore, since the reel 7 rotates only when starting, the seal member 18 has excellent durability.

As described above, according to the present invention, an annular seal plate is provided at the joint between the crank case and the starter case, extending over the entire circumference and inside the reel arrangement area, and an annular seal plate is provided at the inner peripheral edge of the seal plate. Since the sealing member that contacts the reel is provided, a recoil starter device having a simple structure and good and durable sealing performance can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a cutaway side view of one embodiment of the device of the present invention;
FIG. 2 is a cutaway side view of the main part of another embodiment, and FIG. 3 is a cutaway side view of the main part of still another embodiment. 1...Crank case, 2...Crankshaft, 3
...Starter case, 7...Rope reel, 8...
...Pulley, 16...Joint portion, 17...Seal plate, 17a...Peripheral portion, 18...Seal member.

Claims (1)

[Scope of utility model registration request] In a recoil starter device comprising a rope reel and a cylindrical pulley connected to the crankshaft in an outer starter case attached to the crankcase, the A recoil starter device comprising: an annular seal plate extending inside the reel arrangement portion; and a seal member abutting the reel on the inner peripheral edge of the seal plate.