Joints and connections – Structurally installed in diverse art device
Patent
1989-06-28
1990-07-31
Kundrat, Andrew V.
Joints and connections
Structurally installed in diverse art device
403322, 371175, 414723, 172272, F16B 100
Patent
active
049446282
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a coupling means for detachably coupling a working implement to the operating arm of an excavating machine, said implement having an upper surface facing the operating arm, said coupling means comprising a first attachment member which is rigidly mounted to the upper surface of the implement and comprises a coupling element, and a second attachment member supported by the operating arm stick and operating cylinder via horizontal, parallel shafts and comprising a coupling element consisting of two locking parts arranged movable in relation to each other to be brought into locking engagement with the coupling element of the first attachment member by means of a power-generating means, said coupling elements having cooperating engagement surfaces which, when the attachment members are connected together, are located in a common reference plane which is perpendicular to a common central plane for the stick and operating cylinder.
The object of the present invention is to provide an improved coupling means which allows the attachment members to be connected in such a manner that the working implement can assume at least two different positions in relation to the operating arm and which, besides a friction joint, provides a form joint which prevents the attachment members from being displaced laterally in relation to each other in the common plane of the attachment members, either in connected position or when the friction joint has been released or not yet been brought into operation, while the coupling element of the operating arm is in loose but not separable engagement with the coupling element of the implement.
It is a further object of the present invention to provide a coupling means enabling the attachment members to be connected without the implement and its attachment members having to be placed and aligned to each other in any special coupling position.
A still further object of the present invention is to provide a coupling means enabling the attachment members to be connected in such a manner that the working implement can assume an unlimited number of different positions in relation to the operating arm.
A further object of the present invention is to provide a coupling means enabling the implement to be turned in relation to the operating arm while the attachment members are in loose but inseparable engagement with each other. The implement can thus be connected to the operating arm irrespective of how it is placed on the ground. A first connection can thus be achieved immediately, after which the implement can be moved closer to the excavator or to a more suitable place in front of this machine. If the friction joint is released but the form joint retained, the implement can be turned in relation to the attachment members of the operating arm, until the implement assumes the correct position for the work desired. This turning movement is enabled by a lower corner of the implement being brought into abutment with a suitable counter support on the ground. During excavation work, for instance, the implement can thus be directed in a different direction, thereby making more expedient use thereof for a specific task, e.g. excavating or levelling out material laterally.
A further object of the present invention is to provide a coupling means having an attachment member for the implement so designed that it can be welded onto the implement without time-consuming and accurate alignment of the coupling means.
The above mentioned objects are achieved by the coupling means according to the present invention which is substantially characterised in that all engagement surfaces of said two coupling elements have a circle arc-shaped extension in said reference plane and have the same radius.
In the most preferred embodiment of the invention the engagement surfaces are arranged in relation to each other in such a manner that they have the same centre when the attachment members are connected together.
Additional features, advantages and objects of the invention will be apparent f
REFERENCES:
patent: 4663866 (1987-05-01), Karlssoy
patent: 4881867 (1989-11-01), Essex
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