Reciprocating Transmission Device for Power-Driven Cutting Tools
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Solution Overview
Problem
Conventional power-driven cutting tools experience vibration and noise due to internal structural instability, leading to imprecise cutter positioning and inefficient cutting operations, especially when used at heights for pruning or harvesting.
Innovation Solution
A transmission device with enhanced structural rigidity, comprising a base, transmission component, linking component, shaft component, and link component, featuring a bushing around the transmission rod, a driving gear, and an eccentric segment, which reduces vibration and noise by allowing smooth reciprocating displacements of the cutter along a linear path.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a fixed cutter is disposed at the front end of a stick and extensible vertically, then the tool can reach considerable heights for pruning or harvesting, but the cutting operation becomes time-consuming, exhausting and inconvenient
Solution Approach 1:
The patent transforms the static fixed cutter into a dynamic reciprocating cutter system. The transmission device converts rotational motion from the power drill into linear reciprocating motion of the cutter along the stick axis, enabling automatic back-and-forth cutting motion that significantly improves cutting efficiency while maintaining the ability to reach considerable heights.
Solution Approach 2:
The patent replaces manual cutting mechanics with a power-driven reciprocating mechanism. The transmission device uses gear interactions (bevel gear and spur gear) to convert rotational power from an electric drill into linear reciprocating motion, substituting exhausting manual cutting with automated mechanical cutting action.
2Object-affected harmful factors
If an arcuate bearing surface of a bushing guides an arcuate surface of a sliding segment, then the transmission rod slides smoothly reducing vibration and noise, but internal structures of the base vibrate and shake under inertia causing imprecise cutter positioning
Solution Approach 1:
The patent divides the transmission system into functionally independent modules: a transmission rod for linear motion, a linking rod for connection, and a stabilizing base with counterweight. This segmentation allows each component to perform its specific function optimally while reducing overall system vibration and improving positioning precision.
Solution Approach 2:
The patent modifies the motion parameters by converting continuous rotational motion into controlled reciprocating linear motion. The transmission device uses gear ratios and eccentric mechanisms to control the speed, amplitude, and direction of the cutter's reciprocating motion, thereby reducing inertial vibrations and improving positioning accuracy.
3Ease of operation
If a transmission device is added to enable reciprocating cutter motion, then cutting operation smoothness and stability are enhanced, but the device complexity increases with multiple components (base, transmission component, linking component, shaft component, link component)
Solution Approach 1:
The patent combines multiple transmission elements into an integrated transmission device assembly. The base, transmission component, linking component, shaft component, and link component are merged into a compact unified structure that can be attached to the power output end of a standard power drill, reducing overall system complexity while maintaining smooth cutting operation.
Solution Approach 2:
The transmission device is designed to be universally compatible with standard power drills and applicable to various cutting applications (pruning, harvesting). The modular design allows the same transmission mechanism to perform multiple functions while maintaining ease of operation across different use cases.
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 solution provides a stable and smooth cutting operation by minimizing vibration and noise, ensuring precise cutter positioning and reducing user fatigue during high-height pruning or harvesting tasks.
Implementation Method 1
an arcuate bearing surface of a bushing guides an arcuate surface of a sliding segment of a transmission rod in allowing the transmission rod to slide back and forth along a linear path smoothly, thereby reducing vibration and noise
Implementation Method 2
The shaft component has a shaft, a transmission gear and an eccentric segment. The transmission gear fits around the shaft. The eccentric segment is disposed at the front end of the transmission gear. The shaft is pivotally and eccentrically disposed at the eccentric segment
Implementation Method 3
The transmission gear meshes perpendicularly with the driving gear
Data Source
AI summary
A transmission device for a power-driven cutting tool includes a base, a transmission component, a linking component, a shaft component and a link component. The base has a through cavity, a sleeve and a receiving portion. The transmission component is penetratingly disposed in the through cavity, so as to couple the transmission component and the base together. The linking component is penetratingly disposed in the sleeve, so as to couple the linking component and the base together. The shaft component and the link component are disposed in the base. A power source drives the linking component and thereby sequentially drives the shaft component, link component, and transmission component, allowing a cutter of the power-driven cutting tool to undergo reciprocating displacements along a linear path for performing a cutting operation. The transmission device features enhanced structural rigidity, allowing the cutter to move back and forth along a linear track.