Humanoid Robot V1 Development

About the project

Project: Full-Size Humanoid Robot Mechanical Body Design Project: Humanoid Robot V1 Category: Robotics / Mechanical Engineering / CAD Design / 3D Printing / Product Development 1. Project Overview We are looking for an experienced robotics mechanical engineer or CAD designer to develop a complete, functional, full-size humanoid robot body. The robot’s mechanical appearance should be inspired by the attached reference images of the LimX Dynamics humanoid robot, featuring an exposed mechanical structure, compact torso, articulated arms, human-proportioned legs, and lightweight protective body panels. The final design must be original and should not directly copy the manufacturer’s proprietary mechanical designs. Our objective is to create a mechanically functional humanoid platform that can initially operate through remote control and later support autonomous movement, navigation, object manipulation and AI-driven tasks. This project is for engineering-ready mechanical design, not simply a 3D rendering. 2. Robot Specifications Parameter Requirement Robot type Full-size bipedal humanoid Target weight Approximately 50 kg Height Human-sized, finalized during design Total primary actuators 20 RobStride motors Leg actuators 8 motors Upper-body actuators 12 motors Main controller NVIDIA Jetson Orin Nano Super 8 GB Communication CAN / CAN FD, subject to motor compatibility Mechanical structure Aluminum alloy and reinforced polymer Outer body Modular, removable, 3D-printed panels CAD software SolidWorks, Fusion 360 or equivalent Manufacturing FDM 3D printing, CNC machining and standard fasteners 3. Motor Configuration We have selected RobStride actuators as the baseline for the robot. Lower Body: 8 Motors 4 × RobStride RS04 per leg, 8 motors total. * Motor model: RobStride RS04 * Specified target peak torque: 120 Nm per actuator, subject to verification against the exact purchased model * Two legs, each with four powered joints * Engineer must propose the best distribution of the four actuators between hip, knee and ankle mechanisms * The design must account for walking loads, impact forces, joint travel, mechanical stops and balance The designer must evaluate whether four actuators per leg are sufficient for the required walking motions and identify any limitations. Upper Body: 12 Motors The remaining 12 actuators will be distributed between the shoulders, arms and hand mechanisms. The proposed actuator family includes: * RobStride RS04 for high-torque shoulder or elbow movements * RobStride RS03 for medium-torque movements * RobStride RS02 for smaller joints Final motor allocation and torque requirements must be validated before detailed CAD design. The mechanical engineer must provide a joint allocation table identifying the motor model, position, mounting orientation, operating range and load requirements. 4. Mechanical Design Requirements A. Head and Neck Design a compact robotic head inspired by the reference images. Requirements: * RGB/depth camera mounting provision * Additional camera and sensor mounting positions * Internal cable management * Removable head casing * Neck mechanism with clearly defined movement capability * Provision for future audio hardware B. Torso and Chest Design a lightweight but rigid torso capable of supporting the arms, head and internal electronic components. Requirements: * Structural frame with high stiffness * Protective front and rear body panels * Mounting space for the Jetson controller * Space for motor communication and power electronics * Internal cable channels * Ventilation and cooling provisions * Accessible service panels * Emergency-stop mounting location C. Shoulders and Arms Design two articulated robotic arms with motor-integrated joints. Requirements: * Compact shoulder assemblies * Shoulder pitch, roll and yaw mechanisms as permitted by the final motor allocation * Elbow movement * Wrist or hand mounting interfaces * Proper bearings and load paths * Joint mechanical stops * Protected cable routing * Removable protective covers Hands may initially use simplified grippers, with future provision for dexterous robotic hands. D. Waist and Hip Assembly Design a strong central pelvis and waist structure. Requirements: * Support the upper-body mass * Transfer loads into the legs * Provide robust hip actuator mounts * Minimize structural flex * Allow maintenance and motor replacement * Maintain sufficient clearance during walking and bending Any powered waist movement must be explicitly included in the final 20-motor allocation or treated as a future upgrade. E. Legs and Knees Design two human-proportioned mechanical legs. Requirements: * Four RS04 actuators per leg * High-strength hip and knee structures * Appropriate joint bearings * Lightweight thigh and shin structures * Collision-free joint movement * Mechanical stops * Impact-load assessment * Replaceable motor brackets * Space for IMU installation The engineer must perform load calculations for standing, squatting and controlled walking. F. Feet and Ankles Design two stable robotic feet. Requirements: * Lightweight structural foot plates * Replaceable anti-slip rubber soles * Provision for force/contact sensing * Mechanical interfaces for ankle or passive compliance mechanisms * Adequate stability during standing * Ground-contact geometry suitable for walking development Any passive ankle arrangement must be justified through kinematic and stability analysis. 5. Materials and Manufacturing The design should minimize weight and manufacturing cost while maintaining adequate structural strength. Preferred materials: * Aluminum alloy for primary load-bearing brackets and structural components * PETG-CF, PA-CF or other validated reinforced polymers for appropriate noncritical parts * TPU for flexible covers, protective components and foot contact elements * Standard mechanical bearings, shafts and fasteners The robot must be designed for modular assembly and easy maintenance. The designer must distinguish between structural components requiring CNC machining and parts suitable for FDM 3D printing. 6. Engineering Validation The project must include: 1. Kinematic analysis and joint range-of-motion verification. 2. Static and dynamic load calculations. 3. Motor torque and speed suitability assessment. 4. Center-of-mass and balance analysis. 5. Structural FEA for critical load-bearing components. 6. Joint collision and interference checks. 7. Assembly feasibility and serviceability review. 8. Preliminary walking feasibility assessment. A visually attractive design without engineering validation will not be accepted. 7. Required Deliverables The selected designer must provide: * Complete 3D CAD assembly * Fully editable native CAD files * STEP files for all manufactured components * STL files for 3D-printable components * Detailed manufacturing drawings * Complete bill of materials (BOM) * Motor mounting drawings * Fastener and bearing specifications * Exploded assembly views * Mass properties and center-of-mass calculations * FEA reports for critical components * Joint movement limits and axis definitions * URDF-compatible mechanical model for ROS 2 simulation * Assembly instructions * High-quality renders of the completed design All project source files and agreed intellectual-property rights must be transferred to DA VINCI SCIENTIA SI under the final contract. 8. Project Milestones Milestone 1: Concept and Kinematics Full-body proportions, motor distribution, joint layout and initial concept CAD. Milestone 2: Lower-Body Mechanical Design Detailed legs, pelvis, feet and actuator integration. Milestone 3: Upper-Body Mechanical Design Detailed torso, shoulders, arms, head and protective panels. Milestone 4: Engineering Validation Structural calculations, FEA, collision analysis and design corrections. Milestone 5: Final Manufacturing Package Editable CAD files, STEP/STL exports, drawings, BOM, assembly documentation and URDF. Each milestone requires review and approval before proceeding. 9. Ideal Freelancer Qualifications We are seeking candidates with experience in: * Humanoid or legged robot mechanical design * SolidWorks, Fusion 360 or CATIA * Robotic actuator integration * Mechanical transmission and bearing design * Structural FEA * 3D printing and CNC manufacturing * Robotics kinematics * ROS 2 / URDF mechanical modeling Experience designing functional bipedal robots is strongly preferred. 10. Information Required From Applicants Please provide: 1. Examples of previous robotics projects. 2. CAD screenshots or videos of mechanical assemblies you have designed. 3. Experience integrating high-torque robotic actuators. 4. Software you will use. 5. Estimated project completion time. 6. Fixed-price quotation with milestone breakdown. 7. Details of engineering simulations you can deliver. 8. Confirmation that editable source CAD files will be provided. Important: We are developing an actual physical humanoid robot. Applicants with only character modeling or visual rendering experience are not suitable for this project.

Skills required