Oscillating Bead Breaking Arm With Automatic Extraction
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Solution Overview
Problem
Existing bead breaking units for tire changing machines require significant manual effort for extracting the blade after the bead breaking operation, and often necessitate multiple operators due to the blade getting trapped between the tire and rim, leading to inefficiencies in time and personnel usage.
Innovation Solution
A bead breaking unit with an oscillating arm and an actuator device that includes a temporary coupling apparatus, allowing the bead breaking tool to be automatically extracted after the operation, reducing manual labor and facilitating easy removal even if the tool becomes trapped.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual extraction of the blade is used, then the device structure remains simple, but operator effort and time consumption increase significantly
Solution Approach 1:
The system performs self-service by automatically extracting the blade from the tire bead after the breaking operation. The arm oscillates back to the away position under its own weight or spring force, and the coupling apparatus automatically disengages, eliminating the need for manual blade extraction and reducing operator effort to minimal actions.
Solution Approach 2:
The arm is designed to oscillate dynamically between work position and away position. The movement from away to work position is powered by the actuator, while the return movement leverages gravity or spring force, creating a dynamic system that reduces manual intervention while maintaining structural simplicity.
2Productivity
If manual extraction is required, then the device remains simple, but productivity decreases due to repeated manual operations
Solution Approach 1:
The coupling apparatus is designed to automatically re-engage with the arm before each breaking operation and automatically disengage after completion. This preliminary and automatic coupling/disengagement sequence eliminates repeated manual operations, significantly improving productivity without requiring complex control systems.
Solution Approach 2:
The coupling apparatus acts as an intermediary between the actuator and the arm. It automatically transfers the actuator's motion to the arm for positioning, then automatically disengages to allow free return movement, mediating the interaction between powered and unpowered phases of operation to maximize productivity.
3Reliability
If the blade gets trapped between tire and rim, then additional operators are needed, but the device structure remains unchanged
Solution Approach 1:
The system provides self-service in error recovery by automatically oscillating the arm back to the away position. If the blade becomes trapped during the breaking operation, the automatic return oscillation naturally extracts the blade from the trapped position, eliminating the need for additional operators and maintaining structural simplicity.
Solution Approach 2:
The arm performs periodic oscillation between work and away positions. This periodic motion ensures that if the blade becomes trapped, the reverse motion during the return oscillation will naturally free and extract the blade, providing automatic error recovery without additional complexity.
Data Source
AI summary
The bead breaking unit for tire changing machines includes an arm having a first extremity associated turnable with a support structure and a second extremity having a bead breaking tool, the arm being suitable for oscillating between an away position, wherein the bead breaking tool is positioned substantially at a distance from the support structure, and a work position, wherein the bead breaking tool is positioned substantially close to the support structure, at least an actuator device having a mobile element associated sliding with the arm, at least a drive element for driving the arm, associated with the mobile element and suitable for operating during the movement of the mobile element from an extracted position to a retracted position to move the arm towards the work position and an apparatus of temporary coupling between the mobile element and the arm, suitable for operating during the movement of the mobile element from the retracted position to the extracted position to move the arm from the work position to the away position.