Reduction drive
A reinforcing member with higher rigidity is used to prevent case deformation in the reducer, ensuring accurate torque detection and enabling faster, lighter operation of the robot arm.
WO2025204063A1 Publication Date: 2025-10-02NIDEC COMPONENTS CORP
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Patent Information
- Application Number
- PCT/JP2025/002402
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-03-27
- Filing Date
- 2025-01-27
- Publication Date
- 2025-10-02
AI Technical Summary
Technical Problem
The deformation of the reducer case due to the operation of an elliptical wave generator affects the accuracy of torque detection by the torque sensor, leading to reduced performance.
Method used
A reinforcing member with higher surface rigidity than the reducer case is integrated between the torque sensor and the reducer, preventing deformation of the case from being transmitted to the torque sensor, thereby maintaining accurate torque detection.
Benefits of technology
The reinforcing member ensures precise torque detection by the torque sensor while keeping the reducer compact and lightweight, allowing the robot arm to operate at higher speeds and with reduced inertia.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention provides a reduction drive that can prevent case deformation. An annular first case 11 has a first surface 11a, a second surface 11b, a first lateral surface 11c, and a first opening 11d. An annular second case 12 has a second opening that shares an axis passing through the center of the first opening. An annular internal gear 13 is secured to the second case and has internal teeth 13a. A flexible tubular external gear 14 is disposed on the inner side of the internal gear, is secured to the first case at one end in the axial direction, and has external teeth 14a of which a portion is meshed with the internal gear. An elliptical wave generator 19 is disposed on the inner side of the external gear and rotates the external gear. An annular reinforcing member 40 has a third surface 40a, a fourth surface 40b, a second lateral surface 40c, and a third opening 40d, the center of the third opening is aligned with the center of the first opening, and the fourth surface is secured to the first surface of the first case. The reinforcing member 40 has higher surface rigidity than the first case 11.
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