JPH06280718A - Recoil starter mounting structure for general use engine - Google Patents

Abstract

PURPOSE:To provide a recoil starter mounting structure for a general use engine wherein building work can be rationalized and further though facilitating removal as in the conventional example, to provide firm holdability against a vibratory shock at the time of operation, moving, etc. CONSTITUTION:A device is formed by providing a fixed pawl 31 with a built-in wavy plate-shaped spring provided in a recoil starter and a recoil starter stopping boss 21 stoppable in a shaft rotating direction and shaft direction to a recoil starter mounting side crankcase 20 and further integrally molded in a shape opened so that the fixed pawl 31 of the recoil starter can be fitted in one end side in a rotational direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a recoil starter mounting structure for a general-purpose engine.

[0002]

2. Description of the Related Art As shown in Japanese Utility Model Publication No. 63-46695, a conventional example will be described with reference to FIGS. FIG. 5 is a perspective view of a conventional brush cutter, FIG. 6 is a side sectional view of an essential part of FIG. 5, and FIG.
FIG. 6 is a perspective view of an opening and a starting device of a conventional example. In the figure, A is a brush cutter which is a work machine with a portable engine, and an engine E connected to the end of the brush cutter A has the same structure as the conventional structure, but the engine cover 3 on the outer peripheral side of the engine E is A circular opening 1 is formed in a portion, and a starting portion C formed by fitting a ring 6 having a fan 4 and each engaging pin 5 to a crankshaft 7 is formed inside the opening 1. No, engaging portions 8 having engaging grooves 8a that open to one side in the circumferential direction and to the center side are similarly formed at four locations around the opening 1.

Reference numeral B denotes the entire starting device, and a flange 10 which can be fitted to the opening 1 of the engine E is formed on the side surface of the device B projecting on the outer periphery of the recoil starter type handle 9 and located inward of the flange 10. A rotating body 11 having engaging claws 11 'that can be engaged with the engaging pin 5 of the starting portion C is provided projectingly toward and away from each other, and the four outer circumferences of the flange 10 are provided inwardly of the respective engaging portions 8. The protrusion 12 is formed so that it can be fitted.

[0004]

The conventional example is characterized in that the recoil starter, which is a starting device, can be easily removed and that the cover can be attached instead of removing the recoil starter which is unnecessary during operation. For small portable or portable engines that are subject to these, it is necessary to fix them with bolts, which are fastening parts, in order to prevent parts from falling off due to vibration and movement during operation, contact with other objects during use, etc. As a general rule, this conventional example does not perform any processing for these problems and thus cannot be said to be practical. Further, in the fixing method using bolts and the like, there is a problem in the necessity of processing the screw parts and workability in assembling, which hinders rationalization.

The object of the present invention is to eliminate the above-mentioned problems and to rationalize the assembling work without using bolts and the like, and it is easy to remove as in the conventional example, but is resistant to vibration and shock during operation and movement. It is to provide a recoil starter mounting structure for a general-purpose engine that has a strong holding property.

[0006]

A recoil starter mounting structure for a general-purpose engine according to the present invention is a recoil starter which is a manual starting device for a general-purpose engine. In the recoil starter, a fixed pawl 31 having a corrugated plate spring 32 provided therein is provided.
And is integrally molded with the recoil starter mounting side crankcase 20 in a shape that can be locked in the axial rotation direction and the axial direction, and one end side of the rotation direction is open so that the fixing claw 31 of the recoil starter can be fitted. The recoil starter locking boss 21 is provided, and the fixed claw is fitted into the recoil starter locking boss and locked by the corrugated plate spring.

[0007]

[Operation] Fixing claw 2 of recoil starter in groove of locking boss
When 1 is inserted from the open direction and a force is applied to the recoil starter to rotate it, the corrugated leaf spring 3 provided on the fixed claw 21
2 elastically deforms and enters the groove, the fixing claw 31 abuts the side wall of the locking boss 21 to determine the stop position, and the recoil starter is assembled with no rattling and maintaining a sufficient holding force. . When the recoil starter is rotated by applying a force in the opposite direction to that described above, the corrugated leaf spring 32 is elastically deformed, so that the fixing claw 31 is removed from the groove and the recoil starter is removed.

[0008]

EXAMPLES Examples will be described with reference to FIGS. 1 is a perspective view of a recoil starter mounting structure of a general-purpose engine according to an embodiment of the present invention, FIG. 2A is an enlarged view of an X portion in FIG.
2B is a sectional view taken along line BB in FIG. 2, and FIG.
3 is a sectional view taken along line AA in FIG. 3, (b) is a sectional view taken along line CC in FIG. 3, and FIG.
3 is a cross-sectional view taken along line AA in FIG. In the figure, 20 is a crankcase and 30 is a recoil starter, both of which are known. Reference numeral 21 denotes a locking boss, which is the crankcase 20.
There are three in one body. A fixed claw 31 is provided on the recoil starter 30 at an interval equal to that of the locking boss 21. Reference numeral 22 denotes a stopper rib, which is a wall provided on one side in the radial direction of the locking boss 21. Reference numeral 32 is a corrugated leaf spring provided on the fixed claw 31. Reference numeral 32a denotes a concave portion of the corrugated leaf spring, which is a wave trough at the center of the corrugated leaf spring 32. Reference numeral 21a is a rib, which is a protrusion provided in the groove of the locking boss 21 at a central position in the circumferential direction in the radial direction and is aligned with the recess 32a of the corrugated leaf spring. P is the engine rotation direction and is the recoil starter rotation direction. R indicates the direction in which the recoil starter is turned after insertion when assembled.

The operation of the above embodiment will be described. Fixed claw 31
Is aligned with the open side of the groove of the locking boss 21, and the recoil starter 30 is turned in the direction of arrow R, the fixed claw 31 is fitted into the groove of the locking boss 21, and the corrugated leaf spring 32 is elastically deformed. The corrugated crest of the corrugated leaf spring 32 rides over the rib 21a, and the recess 32a of the corrugated leaf spring is fitted into the rib 21a so that the recoil starter 30 is locked by the elastic force of the corrugated leaf spring 32 and the fixing claw 31 contacts the stopper rib 22. The recoil starter stops upon contact. In this way, the recoil starter 30 is attached to the crankcase 20. Recoil starter 3
When 0 is rotated by applying a force in the opposite direction to the above, the ridge of the waveform of the corrugated leaf spring 32 loses the force and elastically deforms to ride over the rib 21a, the recoil starter 30 rotates, and the fixed claw 31 locks the locking boss 21. The recoil starter 30 comes out of the crankcase 20.

[0010]

As described above, the recoil starter can be attached and detached with one touch without using bolts or the like as fastening parts, and has sufficient holding force against vibration during operation and shock during movement. The number of parts can be reduced and the number of assembly steps can be reduced by eliminating the need for bolts and constructing each part as a single body. Therefore, the present invention makes it possible to rationalize the assembling work without using bolts and the like, and is a general-purpose engine that is easy to remove as in the conventional example but has a strong holding property against vibration and shock during operation and movement. The recoil starter mounting structure can be provided.

[Brief description of drawings]

FIG. 1 is a perspective view of a recoil starter mounting structure of a general-purpose engine according to an embodiment of the present invention.

FIG. 2A is an enlarged view of an X portion in FIG. (B) is a BB sectional view in FIG.

3A is a cross-sectional view taken along the line AA in FIG. (B) is CC sectional drawing in FIG.

FIG. 4 is a cross-sectional view taken along the line AA in FIG. 1 in a recoil starter assembled state of the embodiment according to the invention.

FIG. 5 is a perspective view of a conventional brush cutter.

FIG. 6 is a cross-sectional view of a main part of FIG. 5 of a conventional example.

FIG. 7 is a perspective view of an opening and a starting device of a conventional example.

[Explanation of symbols]

20 ... Crankcase, 21 ... Locking boss, 22 ... Stopper rib, 30 ... Recoil starter, 31 ... Fixing claw, 3
2 ... Corrugated leaf spring.

Claims (1)

[Claims] 1. A recoil starter, which is a manual starting device for a general-purpose engine, includes a fixed pawl (31) having a corrugated plate spring (32) provided in the recoil starter and a crankcase (20) on the recoil starter mounting side. A recoil starter locking boss that is integrally molded in a shape that can be locked in the axial rotation direction and the axial direction and has one end side in the rotation direction opened so that the fixing claw (31) of the recoil starter can fit. 21) is included, and the fixed claw is fitted to the recoil starter locking boss and locked by the corrugated plate spring, and the recoil starter mounting structure for a general-purpose engine.