Mechanical leg, robot and torque optimization design method
By combining ball screw and crank slide mechanism, the torque of the knee joint drive motor is amplified, solving the weight and cost problems caused by the large torque of the robot's knee joint, and achieving greater load capacity and cost reduction.
CN117533430BActive Publication Date: 2026-06-09SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SOUTHERN UNIVERSITY OF SCIENCE AND TECHNOLOGY
- Filing Date
- 2023-10-16
- Publication Date
- 2026-06-09
AI Technical Summary
Technical Problem
In existing technologies, the knee joints of robots experience significant torque when bent, necessitating large joint drive mechanisms, which increases the robot's weight and manufacturing costs.
Method used
The system employs a ball screw mechanism and a crank slide mechanism, combined with first and second transmission arms. The slide moves along the screw via a knee joint drive motor, while the connecting rod and crank drive the second transmission arm to open or close, thus amplifying the torque.
Benefits of technology
With the same knee joint drive motor specifications, the robotic leg can withstand a greater load, reduce manufacturing costs, and meet the load requirements of a lower-specification knee joint drive motor.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN117533430B_ABST
Abstract
This invention discloses a mechanical leg, a robot, and a torque optimization design method. The mechanical leg includes a first transmission arm, a second transmission arm, and a transmission assembly. The first transmission arm connects to the robot's body and includes a frame with a guide groove extending along its length. The second transmission arm is rotatably connected to the first transmission arm. The transmission assembly includes a knee joint drive motor, a lead screw, a slide block, a connecting rod, and a crank. One end of the lead screw is connected to the output shaft of the knee joint drive motor, and the other end passes through the frame. The slide block is fitted onto the lead screw and has a guide portion that inserts into the guide groove. Rotation of the lead screw drives the slide block to move axially along the lead screw. One end of the connecting rod connects to the slide block, and the other end connects to the second transmission arm via the crank. This mechanical leg, by combining a ball screw mechanism and a crank-slide block mechanism, effectively amplifies the torque of the knee joint drive motor.
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