Lock Gear Speed Reducer Layout for Low-Impact Rotation Stop
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Solution Overview
Problem
The existing motor speed reducers with lock gears experience mechanical impact on the housing when the lock gear stops rotating, which can compromise the mechanical strength of the housing.
Innovation Solution
A speed reducer design that includes a lock gear with a first mechanical load acting on the contact with a stationary gear stopper and a second mechanical load acting on the meshed teeth, orienting these loads in opposite directions to minimize the impact on the housing when the lock gear stops rotating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lock gear is used to stop the output gear unit from rotating, then the stop of rotation is achieved, but a mechanical impact is exerted on the housing which compromises the mechanical strength of the housing
Solution Approach 1:
The patent applies the counterweight principle by configuring the lock gear to orient the first mechanical load (from stopper contact) and the second mechanical load (from tooth meshing) in opposite directions. These opposing loads counterbalance each other, minimizing the resultant mechanical impact on the housing and preserving housing strength while achieving reliable rotation stopping.
Solution Approach 2:
The patent changes the orientation parameter of the mechanical loads by adjusting the geometric configuration of the lock gear and its engagement with the stationary gear. By controlling the angular orientation of the tooth meshing relative to the stopper contact point, the loads are directed oppositely, transforming the impact characteristics to protect the housing.
2Ease of operation
If the lock gear stopper contacts with the stationary gear stopper to stop rotation, then the output gear unit is stopped, but a sudden mechanical impact is transmitted to the housing
Solution Approach 1:
The patent converts the potentially harmful sudden impact into a beneficial force distribution by designing the tooth meshing engagement to occur simultaneously with stopper contact. The second mechanical load from tooth engagement, oriented oppositely to the first load, transforms the harmful impact into a balanced force system that achieves stopping function while protecting the housing.
3Productivity
If the lock gear revolves and rotates to engage with the stationary gear, then speed reduction is achieved, but stopping this motion creates harmful impact on the housing
Solution Approach 1:
The patent uses the counterweight principle to address the harmful impact generated during stopping. The lock gear is configured so that during the stopping process, the first mechanical load from stopper contact and the second mechanical load from tooth meshing orient in opposite directions, counterbalancing the impact forces and eliminating harmful effects on the housing while maintaining speed reduction functionality.
Data Source
AI summary
A speed reducer-equipped motor includes a motor, a helical gear, an eccentric shaft, a stationary gear with a second stopper, a transmission gear, an output gear unit, and a lock gear with a first stopper. The first stopper mechanically contacts with the second stopper, thereby stopping the lock gear from revolving and rotating to stop the rotation of the output gear unit. A physical load which is generated by the contact of the first stopper with the second stopper and acts on that contact and a physical load which is generated by the contact of the first stopper and the second stopper and acts on meshed portions of teeth of the first stopper and the second stopper are oriented in opposite directions.