Torque Setting Device with L-Shaped Slot Locking Mechanism
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Solution Overview
Problem
Conventional torque wrenches lack precise control over applied torque, leading to potential bolt damage from excessive torque or inadequate fixation due to unintentional changes in pre-set values.
Innovation Solution
A torque setting device with a ratchet tube, operation tube, and control tube mechanism that uses a bead and positioning recesses to lock the torque setting, preventing accidental changes with a spring-loaded system and L-shaped slot for restricted movement, ensuring the set torque value is maintained.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the torque setting device is made simple and accessible, then the ease of operation is improved, but the reliability deteriorates due to unintentional changes in pre-set values
Solution Approach 1:
The control tube is designed to be movable along the operation tube, transitioning between a first position (setting mode) and a second position (locking mode). This dynamic mechanism allows the user to easily adjust torque settings when needed while automatically preventing unintentional changes during normal use, thus resolving the contradiction between ease of operation and reliability
Solution Approach 2:
The bead acts as an intermediary element that engages with positioning recesses to lock the control tube in place. This mediator mechanism ensures that once a torque setting is established, it cannot be accidentally changed, while still allowing intentional adjustments when the control tube is deliberately moved to the first position
2Reliability
If the torque setting device is made secure and locked, then the reliability is improved, but the ease of operation deteriorates due to restricted adjustment
Solution Approach 1:
The control tube transitions between a locked state (second position) that prevents accidental changes and an unlocked state (first position) that allows intentional adjustments. This dynamic design ensures that the device remains reliable during normal operation while still being easily adjustable when needed by the user
3Adaptability or versatility
If the pre-set torque value is made adjustable, then the adaptability is improved, but the reliability deteriorates due to potential accidental changes
Solution Approach 1:
The control tube mechanism provides a dynamic locking system that allows intentional adjustments for different torque requirements while preventing accidental changes. The tube can be moved to the first position for adjustment and locked in the second position for reliable operation, thus achieving both adaptability and reliability
Solution Approach 2:
The bead and positioning recesses act as an intermediary locking mechanism that secures the control tube after adjustment. This ensures that the torque setting can be adapted when needed but remains reliable and unchanged during normal use
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
Ensures accurate and consistent torque application, preventing bolt damage by maintaining the pre-set torque value even if the control tube is touched unintentionally, ensuring proper object fixation without over-tightening or under-tightening.
Implementation Method 1
A spring is mounted to the driving section and biased between the protrusion and the shoulder of the operation tube
Data Source
AI summary
A torque wrench includes a main tube having a driving head and a receiving hole on two ends thereof. A ratchet tube is inserted into receiving hole and has multiple elongate positioning recesses. A passage is defined axially through the ratchet tube. An operation tube is mounted to the ratchet tube and has a driving section and a holding section, and a connection hole is defined through the driving section and the holding section. The driving section has an engaging hole in which a bead is received. A torque unit is received in the receiving hole, the passage and the connection hole. The torque is set by rotating operation tube. A control tube is mounted to the driving section and has a bolt movable in an L-shaped slot to release and restrict movement of the control tube relative to the operation tube.