Movable Ejector Wall for Gripper Bucket Jamming
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Solution Overview
Problem
Existing gripping and cutting shovels with rigidly connected push-out walls face issues such as jamming, malfunctions, and inability to handle bulk materials due to fixed angles between the gripper and push-out wall, leading to overloading and restricted use as a conventional shovel.
Innovation Solution
A design featuring a movable rear wall that acts as a freely movable push-out wall, mounted on a separate axis of rotation, allowing independent movement and adjustable positioning relative to the gripper, enabled by separate drives or a common drive system, including cam track control and overload protection mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the push-out wall is rigidly connected to the gripper at a fixed angle, then the structure is simple and stable, but the shovel cannot handle bulk materials and is prone to jamming and overloading
Solution Approach 1:
The push-out wall is designed as a movable component that can change its position and angle relative to the gripper during operation. The rear wall can pivot between a retracted position (for bulk material handling) and an extended position (for gripping and cutting tasks), allowing the system to adapt to different material types and operational requirements rather than being fixed at a single angle
Solution Approach 2:
The rigid connection between the gripper and push-out wall is divided into separate movable components. The push-out wall is segmented from the gripper assembly and connected via a pivot mechanism, allowing independent movement of each component. This segmentation enables the push-out wall to move independently to prevent jamming while maintaining structural simplicity
2Reliability
If the rear wall is designed as telescopic and movable, then the emptying function is improved, but the structure becomes complex and prone to failure
Solution Approach 1:
The rear wall is designed with dynamic movement capability through a pivot connection rather than a fixed or complex telescopic structure. This allows the rear wall to naturally follow the movement of the gripper while maintaining its push-out function, improving reliability by eliminating complex telescopic mechanisms
Solution Approach 2:
The push-out wall utilizes the movement of the gripper itself to achieve the emptying function. As the gripper opens and closes, the push-out wall automatically moves to push material forward and empty the bucket, eliminating the need for separate complex actuation mechanisms while maintaining reliable emptying performance
3Volume of stationary object
If the extension wall is firmly connected to the grab, then the structure is simple, but the loading space is blocked and compression of material is impossible
Solution Approach 1:
The extension wall is designed as a movable component that can pivot between extended and retracted positions. When the gripper is closed, the extension wall is in the extended position to provide structural support. When the gripper opens, the extension wall retracts to clear the loading space, enabling both material compression and bulk material handling without requiring complex mechanisms
Data Source
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AI summary
The invention relates to a gripper- and cutting bucket (10), consisting of a lower part (12) designed as a bucket (11) and an upper part (14) preferably designed as a gripper (13), for removing agricultural goods from storage facilities and for loading containers or vehicles with goods. The bucket (11) accommodates a movable rear wall (16) and at least the upper part (14) and the movable rear wall (16) can be moved into different positions. The movable rear wall (16) is designed as a freely movable ejector wall (15) mounted on the rotational axis (17) of the gripper (13), or on a separate rotational axis (17) lying in a different position from the rotational axis (17) of the gripper (13) and the positions of the ejector wall (15) and the upper part (14) can be altered relative to one another.