Gasoline Engine Starting Relay with Roller Bearing
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Solution Overview
Problem
Current gasoline engine starters, especially those with emissions over 40 cc, provide a difficult hand-pulled starting experience, particularly for female users, and require significant impact, making them less convenient for tools like brush cutters and chain saws.
Innovation Solution
A gasoline engine starting relay system that includes a housing with power transfer and output assemblies, utilizing a unidirectional roller bearing and overrunning clutch, allowing a conventional drill to drive the engine crankshaft efficiently, reducing user effort and improving starting performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a hand-pulled starter with loop coil spring and accumulative spring is used, then the starting power is improved, but the ease of operation deteriorates due to dry hand feeling during cold start
Solution Approach 1:
The patent introduces a power transfer assembly as an intermediary mechanism between the user's hand and the engine starter. This assembly includes a power transfer shaft with linkage shaft that connects to the starter mechanism, allowing the user to operate the starter without direct hand contact with the spring components, thereby eliminating the dry hand feeling while maintaining starting power
Solution Approach 2:
The patent divides the starter system into separate functional modules: a power transfer assembly with distinct shafts and linkages, and a starter mechanism with coil springs. This segmentation allows the power transfer function to be separated from the spring accumulation function, enabling independent optimization of each component for both power delivery and operational comfort
2Ease of operation
If a conventional drill is used to start the engine, then the ease of operation is improved, but the risk of drill rotation damage increases
Solution Approach 1:
The power transfer shaft acts as an intermediary between the drill and the engine crankshaft. It includes a unidirectional roller bearing that allows the drill to drive the shaft in one direction only, preventing reverse rotation damage while still enabling easy starting operation with common power tools
Solution Approach 2:
The patent converts the potential harmful effect of drill rotation into a beneficial unidirectional driving force. The roller bearing mechanism allows the drill's rotation to be harnessed effectively for starting while automatically preventing any harmful reverse rotation, turning a potential risk into a reliable starting method
3Adaptability or versatility
If a hand-pulled starter is used for engines with emissions over 40 cc, then the adaptability is improved, but the ease of operation deteriorates due to requiring larger impact pull
Solution Approach 1:
The power transfer assembly serves as a mediator that adapts various starting methods (hand-pulled, drill-driven) to different engine sizes. The linkage shaft and roller bearing mechanism provide mechanical advantage and directional control, enabling the system to handle larger engines requiring higher starting power while maintaining ease of operation across different applications
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
Enables successful engine starting with reduced user effort, maintaining a stable idling range of 2500-3500 rpm, and prevents drill rotation damage by halting the power transfer shaft when the engine crankshaft rotates.
Implementation Method 1
a unidirectional roller bearing and a power output shaft, wherein the unidirectional roller bearing is sleeved on the output shaft linkage shaft
Implementation Method 2
the power transfer end assembly comprises a roller bearing and a power transfer shaft, wherein the power transfer shaft—which is sleeved with the roller bearing
Implementation Method 3
the power transfer end assembly comprises an overrunning clutch and a power transfer shaft
Data Source
AI summary
The present invention relates to the field of power tool devices, and more specifically, to a gasoline engine starting relay and a method of starting a gasoline engine. The small two-stroke or four-stroke gasoline engine starting relay comprises a housing, a power transfer end assembly, a power output end assembly, wherein the housing is provided with a device tube slot which has holes on both sides, namely a power transfer end hole and a power output end hole respectively, and which is mated with the power transfer end assembly and the power output end assembly. It can significantly improve and resolve the starting performance of a gasoline engine, and avoid difficulty in the hand-pulled starting so that the starting effect on a gasoline engine with large emissions for female workers, who may find difficulty in hand-pulled starting, is extremely obvious.