Ratchet Clamp Thread Rod Reciprocating Drive Narrow Space
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Solution Overview
Problem
Existing clamps with ratchet devices face challenges in exerting sufficient clamping force, especially in narrow spaces, and are prone to accidental operation due to exposed springs, leading to instability and inefficiency.
Innovation Solution
A clamp design featuring a thread rod with a ratchet device that allows for operation in tight spaces, incorporating a ratchet block and positioning mechanism to efficiently drive the thread rod, enhancing clamping force and ease of operation by enabling the thread rod to reciprocate and rotate, thereby improving clamping stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional ratchet clamp is used with a lever element, then one-hand operation is achieved, but the pressure plate cannot exert additional pressure on the target object, resulting in insufficient clamping force
Solution Approach 1:
The ratchet block is designed to swing between different positions (first position and second position) to dynamically change the operational state. When swung to the second position, it engages the ratchet part to drive the thread rod; when returned to the first position, it disengages to allow resetting. This dynamic mechanism enables continuous clamping force application while maintaining one-hand operation capability.
Solution Approach 2:
The positioning mechanism with the resilient pushing member ensures the ratchet block remains positioned at the second position during the entire clamping process, maintaining continuous engagement with the ratchet part. This continuous engagement allows the thread rod to continuously exert clamping force on the target object without interruption, resolving the issue of insufficient clamping force.
2Ease of operation
If a C-clamp with threaded rod and lever is used, then mechanical operation is facilitated, but the lever cannot be conveniently operated in narrow spaces and the clamping force might be insufficient
Solution Approach 1:
The clamp is divided into functionally independent components: the ratchet device (with main body and ratchet block) for driving the thread rod, the positioning mechanism for maintaining engagement, and the clamping members. This segmentation allows the ratchet device to be operated independently with one hand in narrow spaces, while the thread rod and clamping members provide the mechanical force multiplication needed for sufficient clamping force.
Solution Approach 2:
The ratchet part on the thread rod acts as an intermediary between the ratchet block and the clamping action. The ratchet block engages this ratchet part to convert rotational motion into linear motion of the thread rod, which then translates to the clamping force. This intermediary mechanism enables efficient force transmission in confined spaces where direct lever operation would be difficult.
3Extent of automation
If an exposed spring is disposed between the handle and main body, then the ratchet mechanism functions, but other objects may be accidentally hooked, causing the handle to malfunction
Solution Approach 1:
The spring is extracted from its traditional exposed position between the handle and main body, and instead integrated into the positioning mechanism that pivots with the ratchet block. This relocation removes the source of accidental hooking while preserving the spring's essential function of maintaining positioning force. The spring now only interacts with components that move together as a unit, eliminating exposure to external objects.
Solution Approach 2:
The spring function is merged with the positioning mechanism by making the spring pivot together with the ratchet block. The positioning mechanism and spring become an integrated unit that moves and functions together, eliminating the spring as a separate exposed component that could be accidentally hooked. This merging maintains the ratchet mechanism's automatic positioning function while improving reliability.
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 clamp can effectively operate in narrow spaces with increased clamping force and stability, facilitating efficient force exertion and accelerated operation, ensuring secure clamping of objects.
Implementation Method 1
a ratchet device, combined to a first end of the thread rod, and being operated between an idling position and a driving position, wherein the ratchet device is able to drive the thread rod to rotate and move toward and away from the fixed part at the driving position, or otherwise idle against the thread rod at the idling position
Implementation Method 2
the positioning mechanism comprises a pushing member resiliently pushing the ratchet block, whereby the ratchet block is optionally positioned at the first position or the second position
Implementation Method 3
a thread rod, movably disposed on the installation part and having a first end and a second end
Data Source
AI summary
A clamp with ratchet device for clamping a target object includes a clamp body, a thread rod, a clamping member, and a ratchet device. Therein, the clamp body has a fixed part and an installation part. The thread rod is movably disposed on the installation part and having a first end and a second end. The clamping member is disposed on the second end of the thread rod. The ratchet device is combined to a first end of the thread rod and operated between an idling position and a driving position. The ratchet device is able to drive the thread rod to rotate and move toward and away from the fixed part at the driving position and idle against the thread rod at the idling position. Therefore, the clamp is allowed to be operated in a narrow space.