Small Volume RV Gear Reducer High Speed Deceleration Ratio, Nabtesco Reduction Gear

One of the most critical mechanical structures of industrial robots is the RV gear reducer.

Mechanical principle of RV gear reducer

In 1926, the German Lorenz Brown proposed a planetary gear mechanism with a small tooth difference. It uses the epicycloid as the tooth profile curve. This is the earliest pinion planetary transmission due to the two meshing. One of the gears is in the form of a pin wheel, which is also referred to as a cycloidal pinion planetary gear.

RV transmission is a brand - new transmission method. It is developed on the basis of the traditional oscillating planetary transmission. It not only overcomes the shortcomings of the general swaying transmission, but also has a small size, light weight, large transmission ratio range and long service life. A series of advantages such as stable accuracy, high efficiency and smooth transmission.

Take the RV-E gear reducer as an example

1. First reduction unit - spur gear reduction mechanism

The rotation of the input shaft is transmitted from the input gear to the spur gear, and is decelerated by the gear ratio. This is the first speed reduction section.

2. Second speed reduction unit - differential gear speed reduction mechanism

The spur gear is connected to the crankshaft and becomes the input of the second reduction unit. In the eccentric portion of the crankshaft, the RV gear is mounted by a rolling bearing. In addition, the needle teeth on the inner side of the casing are only one more than the number of RV gears, and are arranged at the same pitch.

If the fixed housing rotates the spur gear, the RV gear also performs eccentric motion due to the eccentric motion of the crank shaft. At this time, if the crankshaft rotates one revolution, the RV gear will rotate one tooth in the opposite direction to the crankshaft. This rotation is output to the shaft of the second reduction unit. When the shaft is fixed, the casing side becomes the output side.

RV gear reducer usage

Industrial Robot , SCARA, Positioning axis ,AGV,
Machine tool, Medical equipment , Indexing mechanism,
Rotary table, Elevator platform ,Wind energy mechanism ,
Gantry , Aeronautics
High - end intelligent equipment industry such as external shafts and radars .


RV gear reducer features

• Less than 1 arc - min Backlash
• Strong impact resistance
• Very compact with high torsional rigidity
• Component in - line version for greater design and space saving flexibility
• Large transmission ratio range
• High transmission efficiency
• Long working life, the gear unit is operated at rated conditions with a life of > 6000 hours.
• The gear unit is operated at rated speed with a noise of < 75 dB.

RV gear reducer RV-110E technical parameters

Operating parameter

Note: the rated torque is the output torque when the output speed is at 15r/min.


Performance Parameter

RV gear reducer RV-110E installation parameter

RV gear reducer RV-110E installation drawings

Warranty service of RV gear reducer

We provide one year quality warranty for our ZKRV series of gear reducers provided that they are used under rated conditions, assembled properly or applied under good lubrications. During this warranty period, refund or free replacement is guaranteed by our company when the performance of the gear reducer is severely downgraded or malfunctioned, however, we will not be responsible for the other costs arisen hereof.

The following situations are exempted from our warranty scope while paid service is available

• The gear reducer is not used based on given conditions
• Foreign objects enter into the gear reducer
• The specification of the lubrication and supporting material used does not meet with given conditions
• Disassemble or reassemble the gear reducer without authorization