Engine Startup Device One-Way Clutch Noise Reduction
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Solution Overview
Problem
Existing engine startup devices generate noise due to compulsory engagement between gears, which can damage the flywheel and lead to increased labor intensity and inconvenience.
Innovation Solution
A startup device featuring a transmission mechanism with a first gear engaging the drive gear and three second gears mounted via a one-way overrunning clutch, engaging with a third gear on the flywheel, eliminating compulsory engagement and reducing noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a compulsory interlocking starting device is used, then the starting mechanism can reliably engage the drive gear with the flywheel gear, but the gears collide and mill each other causing noise and potential damage
Solution Approach 1:
The patent introduces a synchronization gear as an intermediary component between the drive gear and the flywheel gear. This synchronization gear first engages with the flywheel gear to synchronize rotational speeds, then the drive gear engages with the synchronization gear. This intermediary mechanism eliminates direct collision between the drive gear and flywheel gear, resolving the noise and damage problem while maintaining reliable engagement.
2Ease of manufacture
If manual starting methods are used, then the device can be operated without complex equipment, but the labor intensity is huge and convenience is poor
Solution Approach 1:
The patent designs the starting device to automatically complete the engagement process. The drive gear automatically engages with the synchronization gear, which is already engaged with the flywheel gear, eliminating the need for manual intervention. The system serves itself by using the rotational motion and mechanical interactions to achieve proper gear engagement without human effort, thus resolving the contradiction between equipment simplicity and operational convenience.
3Device complexity
If the drive gear directly engages the flywheel gear, then the structure is simple, but gear milling occurs causing noise and potential damage
Solution Approach 1:
The patent adds a synchronization gear as a mediator between the drive gear and flywheel gear. Although this increases the number of components, the synchronization gear serves a critical function of speed synchronization before power transmission. The added complexity is minimal and justified by the elimination of harmful gear collision, noise, and potential damage to the flywheel gear.
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 effectively reduces noise and shortens the engine starting time by eliminating gear collisions and simplifying the structure, enhancing the integration and reducing machining difficulties.
Implementation Method 1
at least one of the second gears is mounted to the mounting shaft via an one way overrunning clutch
Data Source
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AI summary
A startup device comprising a starting motor (2), a drive gear (3) deposed at an output shaft of the starting motor (2) and a fly wheel (8). The startup device further comprises a transmission mechanism including at least three second gears (5) and a first gear (4) engaging with the drive gear (3). An end face of the first gear (4) has the same number of mounting shafts (7) as second gears (5), wherein the at least three second gears (5) are mounted on mounting shafts (7) and at least one of the second gears (5) is mounted to the mounting shaft (7) via an one way overrunning clutch (6). An end face of the fly wheel (8) has a third gear (9) and the second gears (5) are engaged with the third gear (9).