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Cyclo Speed Reducer

Cyclo Speed Reducer

Cyclo reducers-which is short for cycloidal reducers-are a variation of speed reducers that are designed to lower motor speed through an increase in torque and a decrease in output speed. Cyclo reducers gain their effectiveness through use of a round disc that rotates off center, slowing the...

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Cyclo reducers-which is short for cycloidal reducers-are a variation of speed reducers that are designed to lower motor speed through an increase in torque and a decrease in output speed.

Cyclo reducers gain their effectiveness through use of a round disc that rotates off center, slowing the input speed and bringing it down to a more manageable level, useful or necessary for components that receive the output. These mechanisms are generally identified by the ratio of the input speed to the output speed called the reduction ratio.

Cyclo reducers are capable of providing high reduction ratios with high accuracy while remaining a compact size; they are generally ineffective at achieving ratios below 50:1, a ratio other devices such as shaft mounted speed reducers cannot reach in a single stage. They are constructed out of and housed in heavy duty steel or other strong metals, such as aluminum or cast iron. Cyclo reducers are used within material handling, automotive, aerospace, recreational, construction, food and beverage processing, oil and gas and textile industries. They assist in automation equipment, conveyors, presses, pumps, generators and robotics and are frequently used in boats with propellers.

A cyclo reducer is made up of an input shaft, an eccentrically mounted bearing, a cycloidal disc, ring pins, output rollers and an output shaft. The input shaft drives the bearing that turns the disc. Because it is mounted eccentrically, the disc does not rotate around a single center point but rotates off center, closer to some ring pins than others. Output rollers fit through holes that are slightly larger in diameter than the rollers in order to achieve a steady rotation of the output shaft from the wobbling movement of the disc. The lobes around the disk’s edge correspond with the ring pins that are attached to the chassis except that there is one more pin than there are lobes; this causes the cycloidal disc to rotate around the bearing faster than the rotation of the input shaft and in the opposite direction.

The ratio of the input speed to the reduced output speed is equal to the number of ring gear pins minus the number of lobes on the cycloidal disc divided by the number of lobes on the disc, written in a formula as R=(P-L)/L. Cyclo reducers are similar to other speed reducing mechanisms such as gear drives and reduction gears except that unlike many others, the input and output shafts cannot be reversed because the disc will not rotate correctly.

1

Appearance and installation dimension (mm)

Frame Center
height
Installation dimension Shaft end dimension
A1 A0 B1 B0 h s Hole Output shaft Input shaft
n d0 d1 b1 c1 l1 d2 b2 c2 l2
9 80 17 76 30 120 12 M8 4 11 22 6 24.5 30 15 5 17 25
10 100 58 90 35 150 14 30 8 33 35 22
11 120 69 110 55 240 16 16 35 10 38 56 18 6 20.5 35
12 140 73 150 60 280 20 M10 45 14 48.5 71 22 24.5 40
13 160 78 200 75 340 25 M12 17 55 16 59 80 30 8 33 55
14 200 53 320 90 22 70 20 74.5 102 35 10 38 60
15 240 39 380 420 32 M16 90 25 95 120 45 14 48.5 70
16 290 45 480 80 560 35 M20 26 100 28 106 140 50 53.5 82
16A 280 440 500
17 325 80 500 120 630 40 30 120 32 127 165 55 16 59 100
18 420 122 330? 160 800 50 2-M20 6 32 140 36 148 210 70 20 74.5 120
Frame
Outer side dimension
Weight
kg
A
B
H
D
Double Shaft style

Flange style
L
L1
L2
B2
09
100
144
160
140
203
142
According
to motor size
6.5
10
120
185
184
168
215
155
14
11
160
280
240
200
269
191
29
12
200
320
275
240
340
255
45
13
250
390
356
300
409
294
80
14
380
400
425
340
487
369
135
15
440
470
529
430
581
440
210
16
560
620
614
500
676
443
400
16A
520
560
614
724
17
600
690
706
580
795
639
660
18
810
880
883
710
1030
819
1180


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