Speed Reducer Motor Stopper Geometry to Prevent Gear Interference
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Solution Overview
Problem
Existing motor speed reducers face instability in the physical contact between gear protrusions and rotation stoppers, leading to mechanical noise and reduced durability due to potential interference and deformation.
Innovation Solution
A speed reducer design incorporating an eccentric shaft with a support offset from the rotating shaft, a transmission gear with stopper protrusions, a rotation stopper, and an interference avoider to ensure stable contact between the stopper protrusions and the slider plate, minimizing physical interference and deformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If protrusions on the gear engage with rotation stopper members to stop gear rotation, then the gear rotation is stopped, but the physical contact stability is poor leading to mechanical noise and reduced durability
Solution Approach 1:
The patent introduces an interference avoider as an intermediary component between the rotation stopper and the transmission gear. This interference avoider prevents direct contact between the corner of the rotation stopper and the base end portion of the stopper protrusion, thereby eliminating the source of mechanical noise and vibration while maintaining the rotation-stopping function. The intermediary component absorbs the harmful contact forces without compromising the durability of the engagement mechanism.
2Reliability
If protrusions on the gear engage with rotation stopper members to stop gear rotation, then the gear rotation is stopped, but physical interference and deformation occur reducing contact stability
Solution Approach 1:
The interference avoider is designed to preemptively prevent the harmful interference between the rotation stopper corner and the stopper protrusion base end. By providing this preliminary protective structure, the patent eliminates the potential for deformation and contact instability before they can occur during operation. The interference avoider acts as a buffer that maintains proper spacing and alignment, ensuring stable contact throughout the operational cycle.
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 design achieves stable contact between the stopper protrusions and the rotation stopper, reducing mechanical noise and enhancing durability by preventing interference and deformation, thereby improving the overall performance and longevity of the speed reducer.
Implementation Method 1
an interference avoider which is disposed between the rotation stopper and the transmission gear and works to avoid physical interference between a corner of the rotation stopper which faces the stopper protrusion and a base end portion of the stopper protrusion
Implementation Method 2
a rotation stopper on which the stopper protrusion slides in contact therewith to stop the transmission gear from rotating around an axis thereof
Implementation Method 3
an eccentric shaft which includes a support which connects with the first gear and is offset from a rotating shaft of the first gear in a radial direction thereof; a transmission gear which is retained by the support and includes a stopper protrusion protruding toward the first gear, the transmission gear revolving around the rotating shaft of the first gear following rotation of the first gear along with the eccentric shaft
Data Source
AI summary
A speed reducer-equipped motor includes a motor, first gear, eccentric shaft, and stopper protrusions. The speed reducer-equipped motor also includes a transmission gear, an output member, a rotation stopper, and an interference avoider. The transmission gear revolves around an axis of the first gear following rotation of the first gear along with the eccentric shaft. The output member rotates following the revolution of the transmission gear. The rotation stopper works to stop the transmission gear from rotating the center thereof in response to sliding motion of the stopper protrusions on the rotation stopper. The interference avoider is arranged between the rotation stopper and the transmission gear and works to avoid physical or mechanical interference of corners of the rotation stopper which are located close to the stopper protrusions with base end portions of the stopper protrusions.