Coupler for coupling attachments to excavation machines
First Claim
1. A quick coupler for coupling an attachment to a machine, the attachment having first and second coupling pins, the quick coupler comprising:
- a first fixed jaw for the first coupling pin;
a moveable jaw moveable to a closed position for retaining the second coupling pin;
a locking arm arranged to assume a locked position in which the arm prevents withdrawal of the moveable jaw from the closed position, the locking arm including a closed cam follower;
a latch cooperating with the first fixed jaw and moveable to a latched position for retaining the first coupling pin the latch being fast with the locking arm and arranged to assume the latched position upon the locking arm assuming the locked position;
an actuator arranged to move the movable jaw; and
,a translation cam coupled to the actuator, the closed cam follower arranged to follow the translation cam thereby coupling the actuator to the locking arm;
whereby operation of the actuator brings the jaw to the closed position and the arm to the locked position, thereby preventing withdrawal of the jaw from the closed position, while also bringing the latch to the latched position.
1 Assignment
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Accused Products
Abstract
A quick coupler for coupling an attachment, such as a digging bucket, to an evacuator machine. The quick coupler includes a first fixed jaw for a first coupling pin of the attachment. The quick coupler includes a latch cooperating with the first fixed jaw, which is moveable to a latched position for retaining the first coupling pin. A moveable jaw is provided that is able to slide, under power of a hydraulic ram, to a closed position retaining the second coupling pin. A locking arm assumes a locked position, while the latch assumes the latched position, preventing withdrawal of the moveable jaw from the closed position. Consequently, in the event of a hydraulic failure the locking arm simultaneously locks both the first attachment coupling pin, by means of the latch, and the second attachment coupling pin by means of preventing movement of the movable jaw from the closed position.
29 Citations
16 Claims
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1. A quick coupler for coupling an attachment to a machine, the attachment having first and second coupling pins, the quick coupler comprising:
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a first fixed jaw for the first coupling pin; a moveable jaw moveable to a closed position for retaining the second coupling pin; a locking arm arranged to assume a locked position in which the arm prevents withdrawal of the moveable jaw from the closed position, the locking arm including a closed cam follower; a latch cooperating with the first fixed jaw and moveable to a latched position for retaining the first coupling pin the latch being fast with the locking arm and arranged to assume the latched position upon the locking arm assuming the locked position; an actuator arranged to move the movable jaw; and
,a translation cam coupled to the actuator, the closed cam follower arranged to follow the translation cam thereby coupling the actuator to the locking arm; whereby operation of the actuator brings the jaw to the closed position and the arm to the locked position, thereby preventing withdrawal of the jaw from the closed position, while also bringing the latch to the latched position. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification