E CYCLO
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Motion Control Drives E CYCLO High Precision Gearboxes ECY series

E CYCLO High Precision Gearboxes Sumitomo’s compact E CYCLO High Precision Gearboxes debut! CYCLO® Drives were created and developed by Sumitomo. This unique reducer structure by using teeth trochoid tooth profile* is being used in industrial robots and transfer devices all over the world. The ECY series, which was developed as a compact reducer for non-backlash applications, fuses the strain wave gear with the engagement theory of the CYCLO Drives, thus realizing high rigidity and a compact structure that were unavailable until now. * Epitrochoid parallel curves Main bearing (Cross roller...

Allowable Peak Torque (N•m) General strain wave gear External dimensions (mm) The allowable peak torque is approximately 1.5 times (representative value) that of a general strain wave gear (equivalent size), enabling the device to be miniaturized. Ratcheting resistance (safety in the event of an overload) Tortional Stiffness (N•m/arc min) High rigidity Compact, and high torque Examples of general strain wave gear External gear Cup type / Hat type profile General strain wave gear Reasons for above-average strength The tortional stiffness is approximately twice (representative value) that of...

4. Line upTable 4-1 •: Production possible range Frame size [2] lnPut: High speed shaft ' 1-1 Output: Output ring gear housing Fixed: Ring gear housing i = -1/n High speed shaft Fixed: Ring gear housing i = -n , Input: Ring gear housing Output: High speed shaft Fixed: Output ring gear housing i = n + 1 Input: Output ring gear housing Output: Ring gear housing Fixed: High speed shaft i = n/(n + 1) [7] Input: Ring gear housing Output: Output ring gear housing Fixed: High speed shaft i = (n + 1)/n When the high speed shaft, ring gear housing and output ring gear housing all rotate, a...

7. Operating Principle As a principle rule, the ECY series consists of 4 parts. • The bearing for eccentric deforms the cycloid spline into an elliptical shape. • The major axis of the cycloid spline that was deformed into an elliptical shape engages the fixed ring gear housing and the output ring gear housing. • When the fixed ring gear housing is fixed and the bearing used for the eccentric body is turned 1 rotation in the clockwise direction, the cycloid spline will rotate in the counterclockwise direction by an amount corresponding exactly to the difference in the number of teeth, while...

Table 8-1 Rating table 1. Rated torque The rated torque indicates the allowable output torque at the output flange at an input speed of 2000 r/min. 2. Allowable peak torque during acceleration and deceleration This is the peak torque allowed during normal acceleration and deceleration. 3. Allowable maximum momentary torque This is the allowable value of the impact torque that is applied instantaneously to the output shaft by an emergency shutdown or an external shock etc. Indicates the value when 104 deflection cycles are applied to the cycloid spline throughout the entire life of the...

9. Engineering Data 9-1. Angular transmission error Angular transmission error: This is the difference between the theoretical output rotational angle and the actual output rotational angle when an arbitrary rotational angle is applied to the input under a no-load condition. 0in (Arbitrary input rotational angle) i (Reduction ratio) 0out (Actual output rotational output) Figure 9-1 Angular transmission error value (Measurement conditions) Note : 1. Indicates the representative value after run-in. 2. Lubrication: Our standard grease

9-3. Stiffness and Hysteresis Hysteresis curve: This is the relationship between the load and the output side torsion angle when the high speed shaft is fixed, the rated torque applied to the output side, and the load subsequently removed. Lost motion: Torsion angle under the load of the rating torque x ±3% Hysteresis loss: The difference between the torsion angles at zero torque along the hysteresis curve Stiffness: Inclination of the straight line joining 2 points on the hysteresis curve, in the region between arbitrary torque values Reduction ratio Note : The values indicate the...

9-4. No Load Running Torque No load running torque: This means the torque on the input side required to rotate the reducer without a load. No load running torque (Ncm) Input speed (r/min) Figure 9-4 Note : 1. The value indicates the representative value after run-in. 2. Lubrication: Our standard grease 3. Temperature of the E CYCLO's surface: Approx, 40 °C 9-5. Efficiency Efficiency: This is the ratio of the actual input torque to the theoretical input torque when the rated torque is applied to the output side. The efficiency varies according to the input speed, load torque, grease...

10. Main Bearing Table10-1 Main bearing specifications Pitch circle diameter of roller Basic dynamic rated load Basic static rated load Maximum radial load (Frmax) ≦ Allowable radial load Allowable radial load Allowable axial load Frmax = Maximum radial load Fr Maximum external moment (Mmax) NO ≦ Allowable moment Famax = Maximum axial load La Maximum axial load (Famax) ≦ Allowable axial load Mmax = Frmax (Lr + R )+Famax La ・ ・ * If the radial load and the axial load act in combination with each other, ensure that the total load is within the load value indicated in Fig. 10-2. Average radial...

Allowable radial load (N) Allowable axial load (N)

11. High Speed Shaft Radial Load and Axial Load When mounting a gear or pulley on a high speed shaft, use the reducer within a range where the radial load and axial load do not exceed the allowable values. Check the radial load and axial load of the high speed shaft according to the following formulas ([1] to [3]). Pr : Actual radial load (N) Tl : Actual transmission torque on high speed shaft of reducer (N^m) R : Pitch circle radius of sprocket, gear, pulley, etc. (m) Cf Fsi [3] When a radial load and axial load coexist ■CfFsi ^ 1 (Equation 3) Pro : Allowable radial load (N) (Table 11-1)...