Pneumatic Tool Drive Bar Locking Mechanism
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Solution Overview
Problem
Pneumatic tools are prone to nail blocking, which can lead to user safety issues due to the potential for sudden movement of the drive bar during locking, as conventional latching mechanisms require a full tooth pitch sliding distance for effective locking.
Innovation Solution
A novel drive bar locking mechanism using multiple independently moving and staggered latching members, each connected to a resilient member, which can be electronically locked by a solenoid, allowing for quicker and safer locking with reduced sliding distance, enabling efficient nail removal without waiting for the entire tooth pitch to align.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a single latching member is used to lock the drive bar, then the structure is simple, but the drive bar requires a full tooth pitch sliding distance to lock, creating safety hazards
Solution Approach 1:
The single latching member is divided into multiple latching members (first latching member and second latching member) that can independently engage with the drive bar at different positions. This segmentation allows the locking function to be distributed across multiple engagement points, enabling the drive bar to be locked at any position within the tooth pitch range, thereby eliminating the safety hazard of requiring full tooth pitch sliding distance while maintaining structural simplicity.
2Ease of operation
If multiple latching members are used to reduce sliding distance, then safety is improved, but the device complexity increases
Solution Approach 1:
The locking mechanism is segmented into multiple independent latching members, each capable of engaging with the drive bar at different positions. This allows the system to achieve rapid locking by engaging multiple points simultaneously or sequentially within a shorter sliding distance, improving ease of operation and safety without requiring complex control systems.
Solution Approach 2:
The latching members are designed to automatically engage with the drive bar through their own elastic deformation and geometric configuration, without requiring external control systems or complex mechanisms. The resilient members provide self-resetting functionality, allowing the latching members to automatically return to their locked position after engagement, thereby simplifying the overall device complexity while maintaining high operational ease.
3Object-affected harmful factors
If the drive bar is locked with conventional latching mechanisms, then the structure is simple, but the drive bar may still have rapid displacement before locking, causing user damage
Solution Approach 1:
The locking function is segmented across multiple latching members positioned at different locations along the drive bar. This segmentation ensures that at least one latching member can engage with the drive bar within a very short sliding distance, significantly reducing the time and distance required for locking compared to conventional single-latching mechanisms, thereby eliminating the harmful rapid displacement that causes user injury.
Solution Approach 2:
The latching members are pre-positioned and configured to engage with the drive bar at multiple potential positions before the drive bar completes its full tooth pitch sliding distance. This preliminary positioning of multiple engagement points ensures that the drive bar is locked almost immediately upon initiation of the locking action, preventing any harmful rapid displacement and eliminating the time delay associated with conventional locking mechanisms.
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
The mechanism provides a safer and more efficient way to lock the drive bar for cleaning blocked nails by allowing engagement at different times and locations, reducing the sliding distance required for locking, thus minimizing the risk of user injury and improving operational safety.
Implementation Method 1
each of the plurality of latching members is connected to a separate resilient member
Implementation Method 2
the electronic device is a solenoid
Data Source
AI summary
A pneumatic tool is provided comprising: a motor; a drive mechanism connected to the motor; a cylinder; the drive mechanism comprising a drive bar connected to a piston, the drive bar adapted to drive the piston in a linear direction; the cylinder filled with high pressure gas; wherein the piston is housed in the cylinder and adapted to reciprocate within the cylinder; the piston is connected to a striking member adapted to strike a workpiece; wherein the drive mechanism further comprises a plurality of latching members adapted to be in contact with and lock the drive bar. The latching structure provided by the present invention has a smaller sliding distance and is safer than conventional drive bar latching structures.