Gripper device

Gripper device with adjustable gripping position using a crank-piston mechanism and a single motor

This technology is a manipulator end-effector that uses a single drive motor based on a crank-piston mechanism to interlock a pair of gripper fingers and adjusts the rod elevation height to control the gripping position according to the size of the object.

Existing link and parallel-type grippers require multiple motors for individual finger actuation, leading to complex configurations, unsuitability for high-speed operation, and limited work efficiency.

This technology features a rod mechanism that moves up and down by receiving rotational force from a crankshaft through an opening in a support plate. It performs gripping by absorbing and guiding the reaction force generated during object contact through the elastic body and bracket structure of the finger guide. By controlling the motor to adjust the rod's elevation height, it adapts to various object sizes. Applicable to logistics picking, manufacturing automation, and service robots, it enables high-speed gripping of objects of various sizes using only a single motor.

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Key Features:

• A finger guide unit that directs the retraction of the first and second fingers caused by the pressure exerted on the object during the gripping process.
• Includes a support plate that supports the finger guide unit, with an opening formed in the section between the first and second fingers, and a crankshaft coupled to the support plate.
• A gripper device including a first rod that couples with the crankshaft, with its upper end moving up and down through the opening into the space between the first and second fingers as the crankshaft rotates.
• A second finger positioned to face the first finger at a predetermined distance, gripping the object together with the first finger in the space between them.