Robot Screwdriver Gear Train for High-Speed Screw Connections
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Solution Overview
Problem
Current automated screwing devices using articulated robots are limited by the restricted rotary speed of the output element, which hampers efficient screwing processes due to the need for additional drives and restricted flexibility.
Innovation Solution
The integration of a gear system, specifically a planetary gear, between the output element of the articulated robot and the screwdriver tool, allowing for increased rotary speed and eliminating the need for additional drives, while maintaining the flexibility of the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the output element of the articulated robot is used directly to rotate the screwdriver tool, then the device complexity is reduced by eliminating additional drives, but the rotary speed of the screwdriver tool is limited by the robot's output element speed
Solution Approach 1:
A gear mechanism is introduced as an intermediary between the robot's output element and the screwdriver tool. This gear acts as a mediator that transforms the rotational speed from the robot's output shaft to the screwdriver tool, enabling the tool to rotate faster than the robot's native output speed while still being driven by the same motor.
Solution Approach 2:
The gear mechanism changes the speed parameter of rotation between the robot's output element and the screwdriver tool. By using a gear ratio greater than 1:1, the system increases the rotational speed delivered to the screwdriver tool beyond what the robot's output element can provide directly, thus improving screwing efficiency without adding additional motors.
2Speed
If additional motor drives are integrated into the robot tool for high-speed screwing, then the rotary speed of the screwdriver tool is increased, but the device complexity and cost increase
Solution Approach 1:
Instead of adding a second motor, the patent uses a gear mechanism as a passive intermediary that mechanically multiplies the speed from the existing robot output element. This approach achieves high screwdriver tool speeds without the complexity and cost of additional motor drives, control systems, and synchronization mechanisms.
Solution Approach 2:
The existing robot output element serves dual purposes: it provides both positioning control and rotational drive for the screwdriver tool. The gear mechanism allows the single robot motor to self-generate the high rotational speeds needed for efficient screwing without requiring external additional drives, making the system more economical.
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
This configuration enables faster and more efficient screwing processes by achieving higher rotary speeds at the screwdriver tool, thereby enhancing productivity in series production without compromising the degree of automation.
Implementation Method 1
at least one gear, where the gear has a direct operative connection to the output element and screwdriver tool and is set up to transmit a rotary speed between the output element and the screwdriver tool
Implementation Method 2
The integration of a gear system, specifically a planetary gear, between the output element of the articulated robot and the screwdriver tool
Data Source
AI summary
A device is provided for the automated production of screw connections, and includes an articulated robot with an output element and an end link. The output element is arranged on the end link so as to be rotatable around an effector axis (wE). A screwdriver tool is provided, and can be rotated around the effector axis (wE) by the output element. At least one gear may also be provided, where the gear has a direct operative connection to the output element and the screwdriver tool and is set up for transmission of a rotary speed between the output element and the screwdriver tool.