Ratchet Load Binder Attachment for Power Tool Drive
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Solution Overview
Problem
Ratchet-type load binders require multiple strokes of the handle to achieve a single rotation of the ratchet gear, especially in limited spaces, making it inefficient for tensioning chains on flat decks.
Innovation Solution
A load binder attachment with a transmission member, such as a worm gear or sprocket, that can be driven by a handheld power tool to rotate the ratchet gear, allowing for efficient extension and retraction of attachment members, while still enabling manual operation using the ratchet handle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a ratchet mechanism with multiple handle strokes is used to rotate the ratchet gear, then the load binder can be operated manually, but the number of strokes increases significantly in limited spaces, reducing efficiency
Solution Approach 1:
The transmission member is designed to accept both manual drive inputs (via the ratchet handle) and power tool drive inputs (via the coupler), allowing the same mechanism to function in multiple modes. This multi-functionality resolves the contradiction by enabling both manual operability and power-assisted high-speed operation through a single integrated system
Solution Approach 2:
The transmission member acts as an intermediary between the drive input (either manual handle or power tool) and the ratchet gear. It mediates the transfer of rotational motion and torque, allowing efficient power transmission from either source while maintaining the existing ratchet mechanism's functionality
2Force
If multiple strokes of the handle are required to achieve a single rotation of the ratchet gear, then the ratchet mechanism provides mechanical advantage, but the process becomes time-consuming and inefficient
Solution Approach 1:
The invention allows substitution of the manual mechanical system (repeated handle strokes) with a power tool-driven mechanical system. The power tool provides rotational force that drives the transmission member, which then rotates the ratchet gear much faster than manual operation, significantly reducing the time to achieve tension while maintaining the mechanical advantage of the ratchet mechanism
Solution Approach 2:
The system transitions from a static manual operation mode to a dynamic power-assisted mode. The transmission member can be quickly engaged or disengaged from power tool drive, allowing the system to adapt between slow manual operation and fast power-driven operation based on the situation, optimizing both time efficiency and mechanical advantage
3Productivity
If a transmission member is added to enable power tool driving, then the rotation speed of the ratchet gear increases, but the device complexity increases
Solution Approach 1:
The drive system is segmented into separate functional components: the existing ratchet mechanism, the new transmission member, and the coupler for power tool attachment. This segmentation allows the power tool driving capability to be added as a modular addition rather than redesigning the entire system, thereby increasing rotation speed while minimizing overall structural complexity
Solution Approach 2:
The coupler and transmission member are designed to nest around or integrate with the existing ratchet mechanism. The transmission member can be positioned concentrically with the ratchet gear, and the coupler attaches to the transmission member's shaft, creating a compact nested arrangement that adds power tool capability without significantly increasing the overall device footprint or complexity
4Extent of automation
If the transmission member is always engaged with the ratchet gear, then power tool driving is always available, but manual operation with the handle becomes impossible
Solution Approach 1:
The engagement between the transmission member and ratchet gear is made dynamic rather than fixed. The transmission member can be selectively engaged or disengaged from the ratchet gear teeth, allowing the system to switch between power tool-driven mode (when engaged) and manual handle operation mode (when disengaged). This dynamic adjustability maintains operation mode flexibility while providing full power tool capability when needed
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 solution reduces the number of strokes needed to achieve tension in the chain, improving efficiency and usability, especially in confined spaces, by allowing power tool-assisted rotation of the ratchet gear.
Implementation Method 1
a worm gear arranged to mesh with teeth of a ratchet gear of the load binder
Data Source
AI summary
An attachment for a ratchet-type load binder includes a mounting frame arranged for mounting to the load binder at a location registered with a ratchet mechanism thereof, a slot defined by the mounting frame and arranged to extend angularly of the axis of the ratchet gear so as to be adapted to receive a handle of the ratchet mechanism in rotary movement relative to a body of the load binder, and a transmission member having a shaft extending along an axis of rotation of the transmission member and transmission elements carried on the shaft and projecting outwardly therefrom for meshing with the teeth of the ratchet gear. It is one aspect of the invention that the transmission member is movable from a drive position in which the transmission member meshes with the ratchet gear to an idle position in which the ratchet gear can rotate freely of the transmission member, so that conventional operation of the ratchet mechanism with the handle is still available without removing the attachment. It is another aspect of the invention that the mounting frame has a pair of separable portions so that the attachment can be mounted to an existing load binder by connection of the separable portions to one another when respectively located on the body of the load binder.