Attachment mounting/demounting device in working machinery
First Claim
1. An attachment mounting/demounting device for working machinery, the device used to mount an attachment to the working machinery in a demountable manner, comprising:
- a bracket mounted on the working machinery;
an engagement groove formed in said bracket to be releasably engaged with a pin on the attachment side;
a latch capable of switching over between a release posture allowing said pin to come into and out of said engagement groove and an engagement posture preventing slip-off of said pin fitted to said engagement groove;
a latch actuator for switching over said latch between the release posture and the engagement posture;
a lock member capable of switching over between a lock posture locking said latch, which is in the engagement posture, to hold said latch in the engagement posture and an unlock posture unlocking said latch from the lock posture;
biasing means for always biasing said lock member toward the lock posture; and
posture switching means for switching over said lock member in the lock posture to the unlock posture against said biasing means in response to said latch being switched over from the engagement posture to the release posture.
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Accused Products
Abstract
Disclosed is an attachment mounting/demounting device for working machinery by which a pin of an attachment held in engagement with an engagement groove of the mounting/demounting device can be surely locked and operation for locking and unlocking the pin can be easily performed. The mounting/demounting device comprises a latch capable of switching over between a release posture allowing a first pin to come into and out of a first engagement groove and an engagement posture preventing slip-off of the pin fitted to the engagement groove, a lock piston capable of switching over between a lock posture locking the latch in the engagement posture and an unlock posture releasing the latch from the lock posture, and a biasing spring for always biasing the lock piston toward the lock posture. Pressure oil is supplied to the lock piston for switching it over from the lock posture to the unlock posture in response to the pressure oil being supplied to a mounting/demounting cylinder for switching over the latch from the engagement posture to the release posture.
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Citations
13 Claims
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1. An attachment mounting/demounting device for working machinery, the device used to mount an attachment to the working machinery in a demountable manner, comprising:
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a bracket mounted on the working machinery; an engagement groove formed in said bracket to be releasably engaged with a pin on the attachment side; a latch capable of switching over between a release posture allowing said pin to come into and out of said engagement groove and an engagement posture preventing slip-off of said pin fitted to said engagement groove; a latch actuator for switching over said latch between the release posture and the engagement posture; a lock member capable of switching over between a lock posture locking said latch, which is in the engagement posture, to hold said latch in the engagement posture and an unlock posture unlocking said latch from the lock posture; biasing means for always biasing said lock member toward the lock posture; and posture switching means for switching over said lock member in the lock posture to the unlock posture against said biasing means in response to said latch being switched over from the engagement posture to the release posture. - View Dependent Claims (2, 3, 4)
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5. A lock mounting assembly for securely mounting a work attachment having a pair of spaced apart mounting pins to a work machine, the lock mounting assembly comprising:
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a bracket mounted on the work machine having a first engagement groove for receiving a first mounting pin of the pair of mounting pins; a rocker arm pivotally mounted with respect to the bracket, the rocker arm having a second engagement groove for receiving a second mounting pin of the pair of mounting pins; a latch pivotally mounted to the bracket, the latch pivoting between an open position opening the first engagement groove and another position substantially closing the first engagement groove; a mounting/demounting mechanism connected at a first end to the rocker arm and at a second end to the latch; and a lock mechanism mounted to the bracket that retains the latch in the another position to substantially close the first engagement groove when the work attachment is mounted to the work machine. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13)
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Specification