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Cycloidal gear motor Cyclo gearbox drives

Cycloidal gear motor Cyclo gearbox drives U65ea38b0ea814d46840c845ad4c034f1y

Cyclo Gearbox Theory of operation

The input shaft is mounted eccentrically to a Rolling-element bearing (commonly a cylindrical roller bearing), resulting in the cycloidal disc to move within a circle. The cycloidal disc will independently rotate all around the bearing as it is pushed towards the ring gear. That is similar to planetary gears, plus the course of rotation is opposite to that of your input shaft.

The amount of pins about the ring gear is larger than the amount of pins within the cycloidal disc. This triggers the cycloidal disc to rotate about the bearing faster compared to the input shaft is moving it close to, providing an general rotation while in the path opposing the rotation in the input shaft.

The cycloidal disc has holes which have been somewhat more substantial than the output roller pins that go inside them. The output pins will move all-around within the holes to accomplish steady rotation of the output shaft through the wobbling movement of your cycloidal disc.

The reduction fee with the cycloidal drive is obtained in the following formula, the place P implies the quantity of the ring gear pins and L may be the number of lobes around the cycloidal disc.

Single stage efficiency approaches 93% and double stage approaches 86%. Single stage reductions are available commercially as much as 119:1 and double stage up to seven,569:one

The cycloid disc is usually developed having a shortened cycloid in order to lessen the eccentricity on the disc plus the related unbalance forces at high speeds. Because of this, two cycloid discs are sometimes mounted offset by 180°.

Quite a few contemporary precision drives offer the eccentric motion by a number of shafts that also transmit the output force, normally 2 to 5 shafts organized in the similar circular pattern since the output rollers with the most essential style, the shafts are driven by way of planetary-like gears by a central input shaft. Given that these shafts are usually aligned by the input gears this permits the output to become transmitted by roller bearings in lieu of intermittent surface contact. As a result of planetary input this is often properly a two-stage drive and could be designed to become straight driven by a high pace brushless motor, this type is often utilized in robot actuators.

Cycloidal Gearbox Advantages

Cycloidal drives can begin with zero backlash and large torque capacity even though compact in dimension, unlike Involute gearboxes. These are helpful in scenarios wherever reduced speed with higher torque capacity is needed. Cycloidal drives may be developed with drastically larger make contact with places for his or her dimension than any gear-based transmission for example epicyclic gears, applying force through many of the ‘teeth’ at the moment, enabling pretty high torque output for your size with the drive with the price of utilising sliding make contact with.

Cycloidal Gearbox Disadvantages

Due to the eccentric nature from the drive, should the cycloidal disk is just not balanced by a 2nd disk or a counterweight, it can generate vibration which can propagate by way of the driven shafts as well as physique. This can cause improved dress in over the exterior teeth of the cycloidal disk, too as component bearings. With two discs the static imbalance is corrected but a little dynamic imbalance remains, this really is frequently viewed as acceptable for most applications but to cut back vibration higher pace drives use three (or much more) discs to permit the imbalance for being corrected, the outer discs move in unison and in opposition to the middle one particular that’s twice as massive.

Cycloidal in equipment motor BWD/XWD planetary cycloid gearbox drives

Cycloidal gearbox Features

  1. Substantial reduction ratio and effectiveness
  2. Compact structure and modest volume
  3. Stable operation and low sound
  4. Reliable operation and prolonged support lifestyle
  5. Potent overload potential, powerful resistance to affect, small minute of inertia, and relevant to events with recurrent stars and optimistic and unfavorable rotating.

Cycloidal gearbox Sort
B collection cycloid pin wheel speed reducer

  1. BW pedal kind horizontal double-axle cycloid pin wheel pace reducer
  2. BL flange sort vertical loaded double cycloidal pin wheel speed reducer
  3. BWY pedal sort horizontal set up particular motor immediate-connection sort cycloid reducer
  4. BLY flange kind vertical assembly special motor immediate-relationship variety cycloid reducer
  5. BWD pedal type horizontal normal motor direct-connection type cycloid reducer
  6. BLD flange sort vertical keep normal motor immediate-connection type cycloid reducer

X sequence cycloid pin wheel velocity reducer

  1. XW pedal kind horizontal double-axle cycloid pin wheel speed reducer
  2. XL flange variety vertical loaded double cycloidal pin wheel velocity reducer
  3. XWY pedal sort horizontal mounted unique motor direct-connection sort cycloid reducer
  4. XLY flange type vertical assembly particular motor direct-relationship kind cycloid reducer
  5. XWD pedal sort horizontal common motor direct-link sort cycloid reducer
  6. XLD flange kind vertical maintain regular motor direct-link kind cycloid reducer
Selection of reducer
RATIO INPUT POWER & OUTPYT TORQUE FOR TYPE BW & BL
FRAME12151822273339455565
INPUT SPEED1500r/min1000/min
RATIOKWN.m
110.75482.215142727.55211175618.51280222258------
170.75751.5160420805116819783490406356-- -
230.4542172.23165.57791580267718.53962860055118257516125
290.4681.119939889319931527371540663081331491020332
350.4822401.533048667.5165833034907227185401308724539
430.41010.616040538115.5145811295511441318.57408160795522108
590.2692211.14052.2811414595.520007.5410915827330165464022061
71  0.41660.83571.14883134024075.5364411728818.5122332014576
87  --0.552805582.211964215243269108133151219918.514990
RATIO & INPUT POWER FOR TYPE BWY & BLY
FRAME12151822273339455565
INPUT SPEED1500r/min1000/min
RATIOKW
110.752.2
1.5
4
3
7.5
5.5
11
7.5
18.5
15
22
18.5
---
170.751.5
1.1
4
3
7.5
5.5
11
7.5
18.5
15
22
18.5
37
30
--
230.551.5
1.1
2.2
1.5
5.5
4
11
7.5
18.5
15
18.5
15
37
30
55
37
55
290.551.1
0.75
2.2
1.5
5.5
4
11
7.5
15
11
15
11
30
22
55
37
55
350.371.1
0.75
1.5
1.1
4
3
7.5
5.5
15
11
15
11
22
18.5
37
30
55
430.250.551.5
1.1
3
2.2
5.5
4
11
7.5
11
7.5
18.5
5
37
30
55
37
590.180.551.1
0.75
2.2
1.5
4
3
5.5
4
7.5
5.5
15
11
30
18.5
37
32
71-0.370.751.13
2.2
5.5
4
5.5
4
1118.5
15
22
18.5
87--0.551.12.24411
7.5
1518.5

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