Quick blade attachment structure for mowers

Details Quick blade attachment structure for mowers Quick blade attachment structure for mowers

1995-06-05

1997-04-22

Melius, Terry Lee

Harvesters

Motorized harvester

Including cutter yieldably mounted on its drive means

56 175, 56255, 56295, 56DIG17, 30276, A01D 3482

Patent

active

056220359

ABSTRACT:
The invention provides a quick blade attachment structure For quickly but securely attaching and detaching one or a plurality of blades to and from a mower. A rotary member (3) of a mower (1) includes a blade holder (4) and a support member (5) coaxially attached to the blade holder (4) to allow pivotal movement of the support member (5). A pair of blades (23,23) are supported by ends (9a, 9a) of rimmed pins (9,9) projected from a lower surface (4a) of the blade holder (4). A wave washer (16) is interposed between the support member (5) and a cap (17). When the rotary member (3) is assembled by a clamp screw (18), pressing force of the wave washer (16) allows the support member (5) to be rotated integrally with the blade holder (4). The support member (5) further has a pair of grooves (12). Each groove (12) includes a deeper portion (13) which receives the end (9a) of the rimmed pin (9) through relative rotation of either the blade holder (4) or the support member (5) against the pressing force of the wave washer (16), and a guide element (14) which the end (9a) of the rimmed pin (9) moves along to be eventually released from the support member 5. The structure of the invention allows the pair of blades (23,23) to be quickly and easily attached to and detached from the mower (1) by simple rotation of either the blade holder (4) or the support member (5). The structure of the invention also ensures secure attachment of the blades (23,23) to the mower (1). The grooves (12,12) allow the rimmed pins (9,9) to be smoothly moved along the guide elements (14,14) and securely received by the deeper portions (13,13).

REFERENCES:
patent: 3474608 (1969-10-01), Frick
patent: 3604189 (1971-09-01), Harer et al.
patent: 4265018 (1981-05-01), Schrock et al.
patent: 4313297 (1982-02-01), Maier
patent: 4525990 (1985-07-01), Zweegers
patent: 4856194 (1989-08-01), Lee

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