Ultra Precise Positioning Reduction Gear Drive, Nabtesco RV -320a
RV Reduction Gear introduction & development
Compared with the traditional harmonic drive reducer, the RV reduction gear has high fatigue strength, strong rigidity, long service life and stable return accuracy. Unlike harmonic transmission, the motion accuracy will decrease significantly with the use of time. Many high - precision robotic drives in many countries use RV reducers. For the time being, RV reducers have a tendency to gradually replace harmonic reducers in advanced robotic drives.
Nabtesco, Japan: World Speed Reducer
Nabtesco was founded in September 2003. In fact, it is composed of a combination of Teijin Seiki and Nabok. As the world's largest company in the field of precision reducers for industrial robot joints, Nabtesco accounts for 60% of the global market.
The Japanese Teijin Seiki was established in 1944. Around 1980, Teijin Seiki proposed the RV transmission theory and started to apply to the robot industry. In 1986, the Teijin Seiki RV reducer was officially mass - produced and succeeded.
As a manufacturer of motion control systems and components, both companies have mastered high - end core technologies in their specific business areas and controlled a high market share. In 2003, Teijin Seiki and Nabok merged to form Nabtesco, which has developed into a leader in the RV reducer industry, accounting for more than 60% of the market, especially in medium/heavy duty robots, and its RV reducer market. The share is as high as 90%.
In the past 20 years, Nantong Zhenkang has been focusing on the development and production of the core components of precision robots, precision motors and precision RV reducers.
Features of RV Reduction Gear
1. Less than 1 arc - min Backlash
2. Strong impact resistance
3. Very compact with high torsional rigidity
4. Component in - line version for greater design and space saving flexibility
5. Large transmission ratio range
6. High transmission efficiency
7. Long working life
Aplication of RV Reduction Gear
Industrial Robot , SCARA, Positioning axis , AGV, Machine tool, Medical equipment , Indexing mechanism, Rotary table, Elevator platform ,
Wind energy mechanism , Gantry , Aeronautics .
RV Reduction Gear RV-320E technical Parameters
| Model | 20E | 40E | 80E | 110E | 160E | 320E | 450E |
| Reduction gear ratio | 57/81/105 121/141/161 | 57/81/105 121/153 | 81/101 121/153 | 81/111 161 | 81/101/129 145/171 | 81/101/129 141/171/185 201 | 154.8/171 192.4 |
| Rated torque (Nm) | 180 | 400 | 800 | 1100 | 1600 | 3200 | 4500 |
| Maximum working torque (Nm) | 450 | 1000 | 2000 | 2750 | 4000 | 8000 | 11250 |
| Maximum impact torque (Nm) | 900 | 2000 | 4000 | 5500 | 8000 | 16000 | 22500 |
| Maximum output speed (r/min) | 75 | 70 | 70 | 50 | 45 | 35 | 25 |
| Tooth space/idle stroke (arc.min) | 1 | 0.8 | 0.8 | 0.7 | 0.6 | 0.5 | 0.5 |
| Torsional rigidity (Nm/arc.min) | 48 | 105 | 195 | 290 | 390 | 978 | 1175 |
| Permissible torque (Nm) | 880 | 1600 | 2150 | 2940 | 3900 | 7050 | 8800 |
| Allow Thrust (N) | 3920 | 5190 | 7840 | 10770 | 14780 | 19600 | 24500 |
| Weight (kg) | 4.9 | 9.5 | 13.5 | 17.5 | 26.5 | 44.5 | 66.5 |
RV Reduction Gear RV-320E external dimension table
Unit:mm
| Model | 20E | 40E | 80E | 110E | 160E | 320E | 450E |
| A | 65 | 76 | 84 | 92.5 | 104 | 125 | 140 |
| ¢B | 124 h7 | 160 h7 | 190 h7 | 208 h7 | 240 h7 | 284 h7 | 328 h7 |
| ¢C | 105 h6 | 135 h7 | 160 h7 | 182 h7 | 204 h7 | 245 h7 | 275 h7 |
| ¢D | 123 h7 | 160 h7 | 190 h7 | 200 | 230 | 280 | 310 |
| ¢E | 145 | 190 | 222 | 244 h7 | 280 h7 | 325 h7 | 370 h7 |
| F1 | 4 | 4 | 12 | 9 | 15 | 18 | 21 |
| F2 | M10 | M14 | M8 | M12 | M8 | M10 | M12 |
| F3 | 18 | 20 | 15 | 20 | 15 | 18 | 20 |
| ¢G | 72 | 98 | 142 | 138 | 180 | 224 | 250 |
| H1 | 2 | 2 | 6 | 3 | 6 | 6 | 6 |
| H2 | M10 | M14 | M10 | M12 | M16 | M16 | M16 |
| H3 | 18 | 20 | 20 | 20 | 30 | 32 | 35 |
| ¢I | 65 | 85 | 110 | 100 | 145 | 172 | 190 |
| J | 16 | 16 | 16 | 12 | 12 | 16 | 24 |
| ¢K | 6.8 | 9 | 9 | 11 | 13 | 13 | 13 |
| ¢L | 135 | 175 | 206 | 226 | 260 | 304 | 348 |
* Please refer to the installation drawing for the actual mounting.
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