Nut Runner Bit Changer Actuator Mechanism
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Solution Overview
Problem
Conventional nut runner systems require bits to be moved between different locations for attachment and removal, complicating the process and increasing the need for precise robotic manipulation.
Innovation Solution
A nut runner system with a holder table and bit changer that uses an actuator with an engaging shaft and operating pieces to attach and remove bits at the same location, utilizing hydraulic pressure to maintain the bit in place and prevent falling, and includes a spindle with a guide and gears to prevent excessive force on the screw.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If bits are moved between different locations for attachment and removal, then the bit can be secured in place, but the process becomes complicated and requires precise robotic manipulation
Solution Approach 1:
The patent merges the attachment and removal operations into a single location on the holder table. The bit changer is positioned to perform both operations at the same station, eliminating the need for the robot to move the bit between different locations. This is achieved through the bit changer's design with operating pieces that can both engage and disengage bits at one fixed position, thereby simplifying the overall process while maintaining reliability.
Solution Approach 2:
The bit changer is designed to automatically attach and remove bits without requiring complex robotic manipulation. The operating pieces (clamps) are actuated by a simple气缸 (pneumatic cylinder) to perform the attachment and removal functions autonomously at the same location, reducing the need for precise robotic control and simplifying the process.
2Reliability
If bits are moved between different locations for attachment and removal, then the bit can be secured in place, but the need for precise robotic manipulation increases
Solution Approach 1:
The patent combines attachment and removal operations at a single location, which simplifies the robotic operation. Instead of requiring the robot to precisely position and move the bit between multiple stations, the robot only needs to perform one pickup and one placement action at the same location, significantly reducing the complexity of robotic manipulation while ensuring reliable bit attachment.
Solution Approach 2:
The bit changer's operating pieces are designed to automatically grasp and release bits through simple linear motion actuated by a pneumatic cylinder. This self-service mechanism eliminates the need for complex robotic manipulation, as the bit changer handles the precise positioning and securing of bits autonomously at a single location.
3Reliability
If hydraulic pressure is used to maintain the bit in place, then the bit is prevented from falling, but the system requires additional components
Solution Approach 1:
The patent employs a pneumatic cylinder (气缸) to actuate the operating pieces (clamps) for bit attachment and removal. The pneumatic system provides reliable and controlled linear motion to the clamps, ensuring consistent gripping force for secure bit retention. This pneumatic actuation mechanism is integrated into the bit changer, providing a balance between reliability and component simplicity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables efficient and reliable attachment and removal of bits at the same location, preventing bit loss and excessive force on screws, while simplifying the process and enhancing operational safety.
Implementation Method 1
The actuator may be driven by hydraulic pressure
Data Source
AI summary
Nut runner system which includes holder table having tightening point at one end and coupling part at other end, and configured to hold plurality of bits, and nut runner main body including carrier coupled to wrist part of robotic arm, spindle supported by carrier, and bit changer coupled to spindle and which one of plurality of bits is attached. Coupling part of each of plurality of bits has an engaging hole coaxial with tightening point, and annular protrusion that continues in circumferential directions is formed in inner circumferential surface of engaging hole. Bit changer includes actuator, actuator made of engaging shaft to be inserted into engaging hole and operating pieces formed in engaging shaft, operating pieces moving between engaging position wherein operating pieces protrude radially outward from inner circumferential edge of annular protrusion and retracted position wherein operating pieces are retracted radially inward from inner circumferential edge of annular protrusion.