Pipe Threader Die Holder Lock Ring for Secure Torque Transfer
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Solution Overview
Problem
Existing pipe threaders lack efficient mechanisms for torque transmission and die locking, leading to inconsistent thread cutting and potential loss of control during operation.
Innovation Solution
The pipe threader incorporates a drive assembly with a motor and output gear, coupled with a die holder featuring a gear member, lock ring, and biasing members to ensure secure torque transfer and die locking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a motor and output gear are used to transmit torque to the die holder, then torque transmission capability is improved, but device complexity increases
Solution Approach 1:
A gear member with teeth is introduced as an intermediary between the output gear and the die holder. The gear member engages with both the output gear teeth and the die holder, serving as a mediator to transmit torque from the motor through the gear system to the die holder, thereby improving torque transmission while maintaining a manageable device structure through modular engagement.
2Reliability
If a lock ring and key mechanism are added to secure the die in the die holder, then die locking reliability is improved, but device complexity increases
Solution Approach 1:
The key is pre-positioned within the die holder, and the lock ring is designed with engagement features that automatically interact with the key when the die is inserted. This preliminary arrangement of components allows the locking action to occur automatically during the die insertion process, improving reliability without requiring additional complex locking mechanisms or operations.
Solution Approach 2:
The lock ring and key mechanism are designed to function automatically during die insertion and removal. The biasing member causes the key to engage with the lock ring's contact surface automatically when the die is inserted, and the mechanism self-releases when the die is removed, eliminating the need for manual locking or unlocking operations and reducing overall system complexity.
3Stability of the object's composition
If a biasing member is used to bias the key toward the rotational axis, then die holder stability is improved, but device complexity increases
Solution Approach 1:
The biasing member acts as a counterbalancing element that applies a continuous force on the key to maintain it in a predetermined position toward the rotational axis. This counteracting force stabilizes the key's position and ensures consistent engagement with the lock ring, thereby stabilizing the die holder assembly without requiring complex positioning mechanisms or additional components.
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 precise and consistent thread cutting by ensuring reliable torque transmission and die locking, while the loss of control detection mechanism prevents accidents by initiating a stopping event when excessive speed is detected.
Implementation Method 1
a biasing member in the key recess and biasing the key toward the rotational axis
Implementation Method 2
The die holder further includes a compression spring in the key recess and received in the spring recess, such that the key is biased toward the rotational axis
Data Source
AI summary
A pipe threader comprises a housing and a drive assembly including a motor and an output gear having a first plurality of teeth. A die holder defines a rotational axis and includes a gear member including an outer circumference with a second plurality of teeth engaged with the output gear. The gear member includes an inner circumference with a key recess. A lock ring is rotatable relative to the gear member and including a contact surface. A key is arranged in the key recess and a biasing member in the key recess and biasing the key toward the rotational axis. The lock ring is movable between a locked position, in which the contact surface inhibits the key from moving away from the rotational axis, and an unlocked position, in which the key is movable away from the rotational axis in response to insertion of a die into the die holder.