Overview of RCSG Series Harmonic Reducers

The document provides detailed technical specifications, structural descriptions, performance parameters, and dimensional data for the RCSG series of harmonic reducers, including RCSG-I, RCSG-II, and RCSG-III models.

1. Structural Descriptions

• RCSG-I Series: Standard cup-shaped structure where the input shaft is directly connected to the Wave Generator's inner bore via a flat key. The Circular Spline is typically fixed, and the Flexspline serves as the output.
• RCSG-II Series: Also a cup-shaped structure, but the input shaft connects to the Wave Generator's inner bore through an Oldham coupling. The Circular Spline is fixed, and the Flexspline is the output.
• RCSG-III Series: Composed of three parts: Flexspline (cup-shaped), Circular Spline, and Wave Generator. The input shaft is directly matched with the Wave Generator's inner bore by flat key or screws.

2. Performance Specifications

• Starting Torque: Provided for RCSG-I/II and RCSG-III series across various model sizes and gear ratios (e.g., 14, 17, 20, 25, 32, 40, 45).
• Stiffness: Stiffness values of RCSG series are given in N·m/rad multiplied by 10, indicating torsional rigidity.
• Torque Ratings: Rated torque at 2000 r/min, allowable peak torque at start and stop, allowable average torque, and maximum momentary torque are specified for different models and ratios.
• Maximum Input Speed and Allowable Average Input Speed: Defined for each model to ensure operational limits are respected.
• Backlash and Transmission Accuracy: Backlash is measured in arc seconds, with RCSG-II having a maximum backlash 10 arc seconds higher than others. Transmission accuracy is also specified in arc seconds.
• Noise Levels: Noise in decibels (dB) is provided for all ratios.
• Buckling Torque and Hysteresis Loss: Buckling torque values in N·m and hysteresis loss in arc minutes are tabulated for various models and ratios.
• Ratcheting Torque: Provided for certain models and ratios.

3. Dimensional Data and Outline Drawings

• Dimension tables and outline drawings are provided for RCSG-I, RCSG-II, and RCSG-III series, including key dimensions such as diameters, lengths, and mounting hole specifications.
• Limited dimensions (e.g., L10 for RCSG-I, L9 for RCSG-II, and φB, φE, L4, L7 for RCSG-III) are highlighted to indicate critical size constraints.
• Details include bolt sizes (e.g., M4, M5), shaft diameters, and tolerances (e.g., ±0.2 mm, ±0.3 mm, ±0.5 mm).

4. Key Parameters and Recommendations

• Models are categorized by size (14, 17, 20, 25, 32, 40, 45) and gear ratios (1, 2, 3).
• Performance parameters such as starting torque, rated torque, and stiffness increase with model size.
• Backlash and transmission accuracy are critical for precision applications; RCSG-II has slightly higher maximum backlash.
• Noise levels are generally low, supporting use in noise-sensitive environments.
• Maximum input speeds and allowable average speeds must be adhered to for reliable operation.

5. Summary of Critical Data Extracted from Tables

• Starting torque ranges from approximately 0.19 cN·m to 33.00 cN·m depending on model and ratio.
• Rated torque at 2000 r/min ranges from 260 N·m (model 14) up to 8900 N·m (model 45).
• Allowable peak torque at start/stop and allowable average torque values scale with model size.
• Backlash values are typically around 10 to 20 arc seconds, with transmission accuracy around 10 to 20 arc seconds.
• Noise levels range approximately from 60 dB to 90 dB depending on model and operating conditions.

6. Notes and Limitations

• Maximum backlash for RCSG-II series is 10 arc seconds higher than other series.
• Limited dimensions must be respected for proper installation and operation.
• Some data points are missing or marked with dashes, indicating non-applicable or unavailable values.

This structured summary captures the essential technical details and specifications necessary for understanding, selecting, and applying the RCSG series harmonic reducers in mechanical systems.