TH60016A - Restart coil - Google Patents

Abstract

DC60 (12/06/46) Recoil Starter: A recoil starter is designed to prevent vibration of the damping spring (14) caused by engine vibrations during engine operation. This is done to control wear on the spool (4) and cam (8) and similar components made of plastic, thus extending the lifespan of the recoil starter. The recoil starter consists of a drive unit, which is a spool (4) that is rotated by the pull of the recoil rope (2), and a cam (8) that transmits the rotational force of the spool (4) to the engine crankshaft via a one-way rotary transmission mechanism (10,11). The torsion coil damping spring (14) is held in place in the ring shoulders (12,13) on the interconnected surfaces of the spool (14) and cam (8). As the damping spring (14) is twisted by its elastic force, This causes the recoil starter wheel (4) and cam (8) to engage each other via a damping spring (14). The recoil starter prevents the damping spring (14) from vibrating due to engine vibrations during engine operation, thus controlling wear on the recoil starter wheel (4) and cam (8) and similar components made of plastic, thus extending the lifespan of the recoil starter. The recoil starter consists of a drive unit, which is a recoil starter wheel (4) that is rotated by the pulling of the recoil rope (2), and a cam (8) that transmits the rotational force of the wheel (4) to the engine crankshaft via a one-way rotary transmission mechanism (10,11). The damping spring (14), in the form of a torsional coil, is held in the ring shoulders (12,13) on the interconnected surfaces of the recoil starter wheel (14) and cam (8). As the damping spring (14) is twisted by its elastic force, This causes the rope wheel (4) and cam (8) to be joined together via a spring damper (14).

Claims (18)

1. Recoil starter, which consists of: - the starter housing; - the recoil rope (2); - a handle connected to one end of the recoil rope, which is pulled out of the starter housing; - a drive unit mounted inside the starter housing, which is driven to rotate via the recoil rope by pulling the handle, and the rotational force of the drive unit is transmitted to the engine drive pulley via a one-way power transmission mechanism, which starts the engine through the drive unit and the drive pulley by pulling the recoil rope out of the starter housing, where - the drive unit consists of a winding wheel around which the recoil rope is wound, and a cam for transmitting the rotational force of the winding wheel to the drive pulley connected to the engine crankshaft via a one-way power transmission mechanism; - the winding wheel and cam are connected through their respective connecting surfaces, each of which has an annular shoulder. In a facing configuration, the coiled damping spring exerts torsional force within the ring shoulder. This twisting of the damping spring is due to its elastic force. Opposite ends of this damping spring are then attached to the wheel and cam, respectively, allowing them to engage and rotate together via the damping spring. 2. Recoil Starter as defined in Reservation 1, where such damping spring shall be constructed with an outer diameter slightly longer than the diameter of the outer wall of one of the aforementioned ring shoulders, and the damping spring shall be supported in the shoulders in such a manner that the damping spring shall be in contact with the inner surface of the outer wall of one of the aforementioned shoulders of the recoil wheel and cam. 3. Recoil starter as defined in Reservation 1, whereby the damping spring shall be constructed so that its free side is longer than the total length of the ring shoulder in the axial direction, and the damping spring shall be supported between the lower part of the said shoulder when compressed. 4. Recoil starter as specified in Reservation 1, which includes a control path between the cord wheel and the said cam to control the maximum torsional angle of the said damping spring. 5. Recoil starter, as specified in claim number 2, which includes a control path between the cord wheel and the said cam to control the maximum twist angle of the said damping spring. 6. The recoil starter, as specified in claim number 3, which includes a control mechanism between the cord wheel and the said cam, to control the maximum twist angle of the said damping spring. 7. Recoil starter as defined in Reservation 1, where a damping spring is held in the said wheel and cam, while the initial load in the rotational direction for starting the engine is transmitted to said damping spring - a recoil starter consisting of a rotational control path between the said wheel and cam, for controlling the rotation of said cam relative to the said wheel in the rotational direction for starting the engine. 8. Recoil starter, as specified in claim number 7, where the initial load transferred to the damping spring is variable. 9. Recoil starter as specified in claim number 7, which includes a control mechanism for rotation between the winding wheel and the said cam, for controlling the maximum twist angle of the said damping spring. 10. Recoil starter as specified in claim 8, which includes a control path between the winding wheel and the said bearing for controlling the maximum twist angle of the said damping spring. 11. Recoil starter, as specified in Reputation 9, where the rotational control path for controlling the initial load to not act in the direction of rotation shall also serve as the rotational control path for controlling the maximum torsional angle of the damping spring. 12. Recoil starter as specified in claim number 7, which includes a handle damper housed within such handle and to which the end of the recoil rope wound on the rope wheel and pulled out of the starter housing is connected to such handle. 13. Recoil starter as specified in claim number 8, which includes a handle damper located inside the handle and to which the end of the recoil rope, wound on a rope reel and drawn from the starter housing, is connected to the handle. 14. Recoil starter as specified in claim 9, which includes a handle damper located inside the handle and to which the end of the recoil rope, wound on a rope reel and drawn from the starter housing, is connected to the handle. 15. Recoil starter as specified in claim 11, which includes a handle damper located inside the handle and to which the end of the recoil rope, wound on a rope reel and drawn from the starter body, is connected to the handle. 16. Recoil Starter, which consists of: - the starter housing; - the recoil rope; - a handle attached to the front end of the recoil rope pulled out from the starter housing; and - the drive unit, mounted in the starter housing, which is driven to rotate via the recoil rope by pulling the handle. The rotational force from the drive unit is transmitted to the engine drive pulley via a one-way power transmission mechanism, which starts the engine by the drive unit and pulley by pulling the recoil rope from the starter housing. - The drive unit consists of a wheel with the recoil rope wound around it and a cam for transmitting the rotational force of the wheel to the drive pulley, which is connected to the engine crankshaft via a one-way power transmission mechanism; and - a damping spring located between the wheel and the cam, with opposite ends of the damping spring. It will be fixed on the drawstring wheel and the cam, respectively, while the initial load in the rotational direction for engine starting is transmitted to the damping spring; and -the rotational control trajectory is between the drawstring wheel and the cam to prevent the cam from rotating along the drawstring wheel in the rotational direction for engine starting - where the initial load transmitted to the damping spring is determined in a variable manner. 17. Recoil starter as specified in claim 16, which includes a control path between the selector wheel and the said cam for controlling the maximum torsional angle of the said damping spring. 18. Recoil starter as specified in claim 16, which includes a handle damper housed within the handle and to which the end of the recoil rope, wound on a reel and pulled from the starter housing, is connected to the handle.