Excavating – Combined or convertible – Having quick-connect coupling
Patent
1992-01-13
1994-08-02
Reese, Randolph A.
Excavating
Combined or convertible
Having quick-connect coupling
37403, 37443, 414723, B66C 2300
Patent
active
053334000
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to the coupling of drive systems to an accessory of an excavator or the like, wherein for example hydraulic lines are automatically interconnected on coupling of the accessory to the operating part of the excavator, or to the swivelling joint, rotator or the like of the dipper arm.
2. Prior art
In operating an excavator it has become increasingly common to use hydraulic quick couplings to couple and connect, from the driver's cab, hydraulically operated accessories with one or more hydraulic cylinders used for digging.
SUMMARY OF THE INVENTION
In order to quickly and easily provide a coupling and connection of a drive fluid to an accessory on coupling cf the accessory to an excavator or the like, the part which is articulately connected with the dipper arm and the dipper ladle link is provided with one or more connection and coupling means, such as hydraulic couplings of the female type. The accessory to be coupled to said part is provided with corresponding hydraulic couplings of the male type, such that the hydraulic couplings will be interconnected at the same time as the accessory, having been connected to one side of said part, is turned inwardly towards the other side to be attached thereto. The hydraulic couplings are kept together by the accessory having been connected with said part of the excavator. The device according to the invention is not dependent on hydraulic drive for the interconnection, and is usable also in connection with mechanical quick couplings.
DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side view, partly in cross section, showing an adjustable swivelling joint with hydraulic line connections being articulately connected with a dipper arm and the swivelling joint partly engaging an accessory.
FIG. 2 is a top view of the adjustable swivelling joint with hydraulic lines.
DESCRIPTION OF THE PREFERRED EMBODIMENT
FIGS. 1 and 2 show the structure of a joint with a coupling for hydraulic systems. By means of bearing structures, the dipper arm 1 and the dipper ladle link 2 of an excavator are articulately connected with a joint means of, for example, swivelling joint type with an upper part 3, which again is fixedly connected with an inner ring 4. The lower part of the swivelling joint substantially comprises an outer ring 5 and a base plate 6 fixedly connected therewith. A circular projecting edge 7 of the inner ring 4 is arranged to fit into a corresponding groove 8 in the outer ring 5. The inner ring 4 and the outer ring 5 thus form a swivelling joint and the base plate 6 prevents separation of the inner and outer rings.
Along the inner peripheral surface of the inner ring 4 there are provided a plurality of transverse grooves 9 arranged to cooperate with the cone-shaped wedge 10 or the like of a coupling device. The coupling device is connected with the base plate and may include a spring-balanced electro-magnet 11, wherein, in the deenergized state, the wedge is inserted in a groove by means of spring force and wherein, in the energized state, the electromagnet 11 counteracts the spring force so that the wedge 10 may be removed from the groove 9. On energizing, the compression spring 12 will thus be compressed and the inner ring 4 will be released from the coupling device connected with the base plate 6 and the outer ring 5, the inner ring and the outer ring being released from the locking jam and becoming turnable relative to each other for the setting of a desired operating position for the dipper ladle 13 relative to the dipper arm 1. The desired operating position may now be achieved by means of the different movements of the dipper arm and with the dipper ladle 13 resting on a firm underlayer, the electromagnet 11 being activated, in that the dipper arm 1 is operated such that the dipper ladle 13 is forced to turn into the desired position, and when this position has been reached, the current supply will be interrupted and the spring 12 released and the wedge 10 will be inserted by means o
REFERENCES:
patent: 3243066 (1966-03-01), Gardner et al.
patent: 3560040 (1971-02-01), Funk
patent: 4142642 (1979-03-01), Myers
patent: 4355476 (1982-10-01), Engkvist
patent: 4938651 (1990-07-01), Gilmore et al.
patent: 5108252 (1992-04-01), Gilmore et al.
McBee J. Russell
Reese Randolph A.
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