Excavator quick bucket changer with dual safety protection mechanism

Abstract

A quick-change bucket adapter for excavators with a dual safety protection mechanism is provided for connecting a bucket. The quick-change bucket adapter includes a connecting body, a jaw joint, a safety pin, a hydraulic cylinder, a movable hook, and a safety mechanism. The safety mechanism includes a linkage mechanism, a jaw joint stop plate, and a return spring. The hydraulic cylinder drives the movable hook to rotate into an active position, allowing the movable hook and jaw joint to engage the two cylindrical shafts of the bucket, thus securing the bucket. The safety pin passes through the connecting body and restricts the movable hook to this active position. The return spring causes the jaw joint stop plate to form a safety blocking surface within the jaw joint, preventing the cylindrical shafts within the jaw joint from disengaging. This allows the safety pin and jaw joint stop plate to form a dual safety protection mechanism.

Claims

1. A quick bucket changer for an excavator with a dual safety protection mechanism, for connecting a bucket having two cylindrical shafts, comprising: A connecting body; a tiger's mouth, integrally formed on the connecting body, for hooking one of the two cylindrical shafts; A hydraulic cylinder is disposed on the connecting body; a movable hook is pivotally connected to the connecting body and is driven by the hydraulic cylinder to rotate to a release position and an operating position. When the movable hook rotates from the release position to the operating position, it hooks the other of the two cylindrical shafts to fix the bucket; a safety pin is detachably passed through the connecting body to restrict the movable hook to the operating position; and a safety mechanism is disposed on the connecting body. The safety mechanism has a linkage mechanism, a jaw stop plate, and a return spring. The jaw stop plate is driven by the return spring to penetrate the jaw to form a safety blocking surface to prevent the cylindrical shaft hooked into the jaw from disengaging. When the hydraulic cylinder drives the movable hook to rotate to the release position, the movable hook actuates the linkage mechanism, causing the jaw stop plate to rotate and leave the jaw, thereby allowing the cylindrical shaft hooked into the jaw to disengage.

2. The excavator quick-bucket changer with dual safety protection mechanism as described in claim 1, wherein, The connecting body has a safety through hole located within the rotation range of the movable hook and through which the safety pin passes.

3. The excavator quick-bucket changer with dual safety protection mechanism as described in claim 2, wherein, The movable hook has a protrusion that, when the movable hook rotates, passes laterally through the safety hole.

4. The excavator quick-bucket changer with dual safety protection mechanism as described in claim 1, wherein, A cushioning pad is placed on the surface of the tiger's mouth.

5. The excavator quick-bucket changer with dual safety protection mechanism as described in claim 1, wherein, The linkage mechanism has a spring plate for the movable hook to actuate.

6. The excavator quick-bucket changer with dual safety protection mechanism as described in claim 1, wherein, The hydraulic cylinder has a cylinder body and a telescopic rod that slides relative to the cylinder body.

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