Safety Coupling Overview

Transcription

1 Safety Coupling Overview Safety couplings are used to minimize expensive damage when a collision occurs in a high performance servo drive system. When a collision occurs, the safety coupling will stop the destructive inertial forces instantly and eliminate downtime and repair costs often associated when just an overload relay is used. Safety couplings are spring loaded form fit couplings that transmit torque through the use of a special degressive cup spring in which the hardened and polished balls are preloaded into the spherical indentations. When an overload occurs, the hub (with its ball cage) will over twist and press the balls out of the indentations to disengage. Only the balls and cup spring move axially resulting in a very low disengagement mass. A proximity switch is used to initiate an emergency stop to shut the servo motor down. Safety Coupling Mechanism: Automatic Re-engagement Versions Re-engagement occurs at the same reference point every 360. Versions are available that will automatically re-engage or remain disengaged until drive rotation is reversed. Bearing Support Versions Integrated ball bearing or sliding bearing to support the pulley. This eliminates the need for support inside the pulley and allows for a more compact overall design. Degressive Spring Curve Special springs were developed to operate on the diminishing side of the spring curve resulting in iediate torque drop off at activation and reduced destructive forces and damage. 116

2 Clamping Methods: Aluminum Radial Clamping Hub High tensile strength, low weight aerospace aluminum provides very low inertia for better system performance. New EASY Clamp System prevents damage to hubs for easy shaft mounting and dismounting while compensating for tolerance differences between shaft and hub. Balancing Plug is positioned at a precise angle in the hub for balanced, high speed performance. Precision machined involutes (not a die cast). Zero backlash torque transmission is guaranteed through the elimination of keyways. Only one clamping screw allows for fast installation. Steel Conical Bushings (also available in aluminum versions) High clamping forces to insure safe transmission of torque and backlash free connection. Additional draw-off holes provide easy hub removal. Unique hub design offers shortest coupling length. Connection Method: Brass Wire Press-Fit Connection Mechanically formed between hub and multi-layered bellow for a strong zero backlash connection. No glue connection insures connection in high temperature, chemical sensitive applications. Torque Transmission Elements: Bellows Guarantees a zero backlash torque transmission with extremely high torsional stiffness while maintaining flexibility for compensation of misalignment. Low mass moment of inertia for increased system performance. Maintenance free up to temperatures of 300 C (572 F). Depending upon torsional stiffness requirements, lateral spring rates and lengths, standard bellows are available in 2, 4 and 6 corrugations. For longer lengths, custom manufacturing is available. Elastomers Elastomers vary in hardness values from 98 Shore A (red) for maximum dampening capabilities to the 72 Shore D (white) where higher stiffness is required. Excellent electrical insulator to prevent the transfer of electrical fields. Involute shaped teeth provide easy plug-in assembly for long and durable life. 117

3 SKB-KP Direct Drive Bellows Safety Coupling Bellows safety coupling with radial clamping hubs. Bellow compensates for axial, lateral and angular misalignment. Stainless steel bellow; aluminum and steel hubs; steel safety element Technical data/dimensions SKB-KP 10-3 m 2 Torsion Resistance / arcmin (lb-ft/deg) Max. Lateral Misalignment Tighten s *Al Hub **Steel Hub ød1* ød2** SKB-KP M (18) (53) (0.44) (93) (0.006) (0.99) (62) (89) (2.067) (3.189) (0.035) (0.236) (0.748) (0.236) (0.630) SKB-KP M (53) (106) (0.44) (93) (0.006) (0.99) (62) (89) (2.067) (3.189) (0.035) (0.315) (0.748) (0.315) (0.630) SKB-KP M (71) (133) (1.71) (399) (0.008) (2.20) (124) (159) (2.717) (3.720) (0.047) (0.354) (1.181) (0.394) (1.000) SKB-KP M (115) (266) (1.71) (399) (0.008) (2.20) (124) (159) (2.717) (3.720) (0.047) (0.472) (1.181) (0.472) (1.000) SKB-KP M (195) (398) (1.71) (399) (0.008) (2.20) (124) (159) (2.717) (3.720) (0.047) (0.630) (1.181) (0.551) (1.000) SKB-KP M (221) (531) (5.13) (886) (0.008) (4.19) (310) (354) (3.465) (4.213) (0.063) (0.591) (1.496) (0.709) (1.378) SKB-KP M (354) (885) (5.13) (886) (0.008) (4.19) (310) (354) (3.465) (4.213) (0.063) (0.787) (1.496) (0.709) (1.378) SKB-KP M (531) (1328) (5.13) (886) (0.008) (4.19) (310) (354) (3.465) (4.213) (0.063) (0.984) (1.496) (0.945) (1.378) SKB-KP M (708) (2036) (18.79) (1240) (0.008) (8.38) (575) (708) (4.528) (5.197) (0.071) (0.984) (1.693) (0.945) (1.732) SKB-KP M (1151) (2921) (18.79) (1240) (0.008) (8.38) (575) (708) (4.528) (5.197) (0.071) (1.260) (1.693) (1.260) (1.732) SKB-KP M12/M (1770) (4425) (47.84) (2303) (0.008) (14.99) (1018) (1947) (5.394) (6.003) (0.098) (1.378) (2.165) (1.102) (2.283) SKB-KP M (3098) (7081) (54.67) (4694) (0.008) (15.87) (1770) (1947) (5.394) (6.654) (0.098) (1.654) (2.756) (1.575) (2.283) SKB-KP M14/M (4425) (8851) (273.37) (3542) (0.012) (44.09) (1637) (2567) (7.126) (9.291) (0.146) (1.968) (2.953) (1.654) (3.937) SKB-KP M (7081) (17702) (300.71) (6199) (0.012) (46.30) (2567) (2567) (7.126) (9.409) (0.146) (2.559) (3.346) (1.772) (3.937) SKB-KP M (13276) (26552) (379.30) (12398) (0.008) (66.14) (2567) (2567) (7.126) (10.354) (0.146) (2.362) (3.465) (2.362) (3.937) 95

4 SKY-KS Series Safety Coupling Bellows safety coupling with self-centering conical hub and radial clamping hub. Bellow compensates for axial, lateral and angular misalignment. Stainless steel bellow; aluminum and steel hubs; steel safety element SKY-KS 10-3 m 2 Torsion Resistance / arcmin (lb-ft/deg) Max. Lateral Misalignment *Bellows side of coupling **Safety element 112 */** Tighten s * ** ød1* ød2** SKY-KS M4/M (18) (53) (0.41) (93) (0.006) (1.10) (27) (18) (2.067) (3.150) (0.236) (0.630) (0.197) (0.453) SKY-KS M4/M (53) (106) (0.41) (93) (0.006) (1.10) (27) (18) (2.067) (3.150) (0.236) (0.630) (0.197) (0.453) SKY-KS M (71) (133) (1.50) (399) (0.008) (2.16) (35) (35) (2.717) (3.386) (0.354) (0.748) (0.354) (0.669) SKY-KS M (115) (266) (1.50) (399) (0.008) (2.16) (35) (35) (2.717) (3.386) (0.354) (0.748) (0.354) (0.669) SKY-KS M (195) (398) (1.50) (399) (0.008) (2.16) (35) (35) (2.717) (3.386) (0.394) (0.748) (0.394) (0.669) SKY-KS M (221) (531) (4.78) (886) (0.008) (4.19) (124) (124) (3.465) (3.898) (0.472) (0.945) (0.472) (0.945) SKY-KS M (354) (885) (4.78) (886) (0.008) (4.19) (124) (124) (3.465) (3.898) (0.472) (0.945) (0.472) (0.945) SKY-KS M (531) (1328) (4.78) (886) (0.008) (4.19) (124) (124) (3.465) (3.898) (0.551) (0.945) (0.551) (0.945) SKY-KS M (708) (2036) (17.43) (1240) (0.008) (8.60) (124) (124) (4.528) (4.606) (0.709) (1.378) (0.709) (1.378) SKY-KS M (1151) (2921) (17.43) (1240) (0.008) (8.60) (124) (124) (4.528) (4.606) (0.866) (1.378) (0.866) (1.378) SKY-KS M (1770) (4425) (42.71) (2303) (0.008) (14.77) (301) (301) (5.394) (5.630) (1.102) (1.654) (1.102) (1.654) SKY-KS M10/M (3098) (7081) (49.89) (4694) (0.008) (16.98) (575) (301) (5.394) (5.984) (1.181) (1.890) (1.181) (1.732) SKY-KS M10/ M (4425) (8851) (198.19) (3542) (0.012) (35.27) (575) (1018) (7.126) (8.189) (1.575) (2.362) (1.575) (2.441) SKY-KS M (7081) (17702) (235.78) (6199) (0.012) (40.79) (1018) (1018) (7.126) (8.307) (1.654) (2.756) (1.575) (2.441) SKY-KS M (13276) (26552) (240.91) (11513) (0.008) (41.89) (1018) (1018) (7.126) (8.307) (1.890) (2.756) (1.890) (2.441)

5 SKB-EK Direct Drive Elastomer Safety Coupling Technical data/dimensions SKB-EK 10-3 m 2 Torsion Resistance /arcmin (lb-ft/deg) Elastomer safety coupling with radial EASY Clamp System hubs. Star-shaped elastomer element with involute tooth profile and high shore hardness ensures zero backlash over life of product. Electrically insulating and dampens oscillation resonance. Aluminum and steel hubs; elastomer spider; steel safety element Max. Lateral Misalignment Tighten s *Al Hub **Steel Hub ød1* ød2** SKB-EK M (18) (53) (0.44) (11) (0.004) (0.97) (71) (89) (2.067) (3.031) (0.035) (0.315) (0.787) (0.236) (0.630) SKB-EK M (53) (106) (0.44) (11) (0.004) (0.97) (71) (89) (2.067) (3.031) (0.035) (0.315) (0.787) (0.315) (0.630) SKB-EK M (71) (133) (1.71) (27) (0.004) (2.20) (124) (159) (2.717) (3.602) (0.047) (0.472) (1.260) (0.394) (1.000) SKB-EK M (115) (266) (1.71) (27) (0.004) (2.20) (124) (159) (2.717) (3.602) (0.047) (0.472) (1.260) (0.472) (1.000) SKB-EK M (195) (398) (1.71) (27) (0.004) (2.20) (124) (159) (2.717) (3.602) (0.047) (0.551) (1.260) (0.551) (1.000) SKB-EK M (221) (531) (5.13) (46) (0.004) (4.41) (310) (354) (3.465) (4.213) (0.063) (0.630) (1.496) (0.709) (1.378) SKB-EK M (354) (885) (5.13) (46) (0.004) (4.41) (310) (354) (3.465) (4.213) (0.063) (0.748) (1.496) (0.709) (1.378) SKB-EK M (531) (1328) (5.13) (46) (0.004) (4.41) (310) (354) (3.465) (4.213) (0.063) (0.866) (1.496) (0.945) (1.378) SKB-EK M12/M (708) (2036) (19.14) (89) (0.005) (9.26) (1018) (708) (4.528) (5.276) (0.071) (0.945) (1.693) (0.945) (1.654) SKB-EK M12/M (1151) (2921) (19.14) (89) (0.005) (9.26) (1018) (708) (4.528) (5.276) (0.071) (1.260) (1.693) (1.260) (1.654) SKB-EK M (1770) (4425) (58.09) (354) (0.006) (18.96) (1637) (1947) (5.394) (6.594) (0.098) (1.181) (2.756) (1.102) (2.283) SKB-EK M (3098) (7081) (58.09) (354) (0.006) (18.96) (1637) (1947) (5.394) (6.594) (0.098) (1.654) (2.756) (1.575) (2.283) SKB-EK M14/M (4425) (8851) (269.95) (531) (0.004) (42.99) (1637) (2567) (7.126) (8.031) (0.146) (1.890) (2.756) (1.654) (3.937) 96

6 SKY-ES Series Safety Coupling SKY-ES 10-3 m 2 Elastomer safety coupling with self-centering conical hub and radial clamping hubs. Star-shaped elastomer element with involute tooth profile and high shore hardness ensures zero backlash over life of product. Electrically insulating and dampens oscillation resonance. Steel hubs; elastomer spider; steel safety element Torsion Resistance /arcmin (lb-ft/deg) Max. Lateral Misalignment */** Tighten s * ** ød1* ød2** SKY-ES M4/M (18) (53) (0.44) (11) (0.004) (1.10) (35) (18) (2.067) (3.268) (0.354) (0.748) (0.197) (0.453) SKY-ES M4/M (53) (106) (0.44) (11) (0.004) (1.10) (35) (18) (2.067) (3.268) (0.354) (0.748) (0.197) (0.453) SKY-ES M5/M (71) (133) (1.71) (27) (0.004) (2.20) (71) (35) (2.717) (3.937) (0.472) (1.024) (0.354) (0.669) SKY-ES M5/M (115) (266) (1.71) (27) (0.004) (2.20) (71) (35) (2.717) (3.937) (0.472) (1.024) (0.354) (0.669) SKY-ES M5/M (195) (398) (1.71) (27) (0.004) (2.20) (71) (35) (2.717) (3.937) (0.472) (1.024) (0.394) (0.669) SKY-ES M5/M (221) (531) (4.78) (46) (0.004) (4.19) (71) (159) (3.465) (4.547) (0.472) (1.417) (0.472) (0.945) SKY-ES M5/M (354) (885) (4.78) (46) (0.004) (4.19) (71) (159) (3.465) (4.547) (0.472) (1.417) (0.472) (0.945) SKY-ES M5/M (531) (1328) (4.78) (46) (0.004) (4.19) (71) (159) (3.465) (4.547) (0.551) (1.417) (0.551) (0.945) SKY-ES M8/M (708) (2036) (18.79) (89) (0.005) (9.48) (310) (159) (4.528) (5.728) (0.748) (1.575) (0.709) (1.378) SKY-ES M8/M (1151) (2921) (18.79) (89) (0.005) (9.48) (310) (159) (4.528) (5.728) (0.748) (1.575) (0.866) (1.378) SKY-ES M12/M (1770) (4425) (63.22) (354) (0.006) (19.40) (1018) (310) (5.394) (7.362) (0.984) (2.362) (1.102) (1.732) SKY-ES M12/M (3098) (7081) (63.22) (354) (0.006) (19.40) (1018) (310) (5.394) (7.362) (1.102) (2.362) (1.181) (1.732) SKY-ES M12/M (4425) (8851) (194.78) (531) (0.004) (35.27) (1018) (1018) (7.126) (8.583) (1.890) (2.362) (1.575) (2.756) *Bellows side of coupling **Safety element 113

7 SKB Series Indirect Drive Safety Coupling SKB 10-3 m 2 Pulley safety coupling with self-centering conical hub and integrated bearing. Integrated bearing for high axial and radial loading to support pulleys, gears or sprockets. Steel hubs; steel safety element Tighten s Thread for Pulley min. max. SKB M5 10 6xM (18) (53) (0.31) (0.79) (89) (2.047) (1.614) (0.035) (0.236) (0.630) SKB M5 10 6xM (53) (106) (0.31) (0.79) (89) (2.047) (1.614) (0.035) (0.315) (0.630) SKB M6 18 6xM (71) (133) (1.23) (1.76) (159) (2.717) (1.890) (0.047) (0.394) (1.000) SKB M6 18 6xM (115) (266) (1.23) (1.76) (159) (2.717) (1.890) (0.047) (0.472) (1.000) SKB M6 18 6xM (195) (398) (1.23) (1.76) (159) (2.717) (1.890) (0.047) (0.551) (1.000) SKB M8 40 6xM (221) (531) (3.76) (3.31) (354) (3.425) (2.185) (0.063) (0.709) (1.378) SKB M8 40 6xM (354) (885) (3.76) (3.31) (354) (3.425) (2.185) (0.063) (0.709) (1.378) SKB M8 40 6xM (531) (1328) (3.76) (3.31) (354) (3.425) (2.185) (0.063) (0.945) (1.378) SKB M xM (708) (2036) (14.35) (7.28) (708) (4.449) (2.815) (0.071) (0.945) (1.732) SKB M xM (1151) (2921) (14.35) (7.28) (708) (4.449) (2.815) (0.071) (1.260) (1.732) SKB M xM (1770) (4425) (41.69) (13.67) (1947) (5.354) (3.445) (0.098) (1.102) (2.283) SKB M xM (3098) (7081) (41.69) (13.67) (1947) (5.354) (3.445) (0.098) (1.575) (2.283) SKB M xM (4425) (8851) (259.70) (44.09) (2567) (7.126) (5.591) (0.146) (1.654) (3.937) SKB M xM (7081) (17702) (259.70) (44.09) (2567) (7.126) (5.591) (0.146) (1.890) (3.937) SKB M xM (13276) (26552) (259.70) (44.09) (2567) (7.126) (5.591) (0.146) (2.362) (3.937) 97

8 SKG Series Indirect Drive Safety Coupling SKG 10-3 m 2 Pulley safety coupling with self-centering conical hub and integrated bearing. Integrated bearing for high axial and radial loading to support pulleys, gears or sprockets. Aluminum and steel hubs; steel safety element Tighten s Thread for Pulley min. max. SKG M xM (18) (35) (0.68) (1.10) (35) (2.362) (1.575) (0.039) (0.472) (0.709) SKG M xM (35) (80) (0.68) (1.10) (35) (2.362) (1.575) (0.039) (0.472) (0.709) SKG M xM (80) (159) (0.68) (1.10) (35) (2.362) (1.575) (0.039) (0.472) (0.709) SKG M xM (80) (204) (2.39) (2.43) (71) (3.031) (2.126) (0.055) (0.709) (1.004) SKG M xM (159) (310) (2.39) (2.43) (71) (3.031) (2.126) (0.055) (0.709) (1.004) SKG M xM (221) (664) (2.39) (2.43) (71) (3.031) (2.126) (0.055) (0.709) (1.004) SKG M xM (443) (885) (6.15) (4.19) (106) (3.622) (2.165) (0.055) (0.866) (1.535) SKG M xM (575) (1505) (10.25) (5.29) (106) (4.134) (2.598) (0.067) (0.866) (1.535) SKG M xM (885) (2390) (35.54) (11.02) (310) (5.315) (3.346) (0.087) (1.142) (1.732) SKG M xM (1770) (4868) (36.56) (11.68) (310) (5.315) (3.346) (0.087) (1.142) (1.732) 98

9 SKX-L Series Safety Coupling SKX-L of Inertia 10-3 m 2 Pulley safety coupling with extended hub for smaller pulleys with radial clamping hub. Integrated sliding bearing to support pulleys, gears or sprockets. Steel hubs; steel safety element Tighten s Thread for Pulley SKX-L M5 10 6xM Extended (18) (53) (0.17) (0.55) (89) (1.654) (1.811) (0.035) (0.276) (0.630) (0.787) SKX-L M5 10 6xM (53) (106) (0.17) (0.55) (89) (1.654) (1.811) (0.035) (0.433) (0.630) (0.787) SKX-L M6 18 6xM (71) (133) (0.85) (1.43) (159) (2.362) (2.047) (0.047) (0.433) (1.000) (1.181) SKX-L M6 18 6xM (115) (266) (0.85) (1.43) (159) (2.362) (2.047) (0.047) (0.591) (1.000) (1.181) SKX-L M6 18 6xM (195) (398) (0.85) (1.43) (159) (2.362) (2.047) (0.047) (0.709) (1.000) (1.181) SKX-L M8 40 6xM (221) (531) (3.25) (3.31) (354) (2.992) (2.717) (0.063) (0.709) (1.378) (1.654) SKX-L M8 40 6xM (354) (885) (3.25) (3.31) (354) (2.992) (2.717) (0.063) (0.866) (1.378) (1.654) SKX-L M8 40 6xM (531) (1328) (3.25) (3.31) (354) (2.992) (2.717) (0.063) (1.024) (1.378) (1.654) SKX-L M xM (708) (2036) (11.28) (6.61) (708) (4.094) (3.307) (0.071) (0.984) (1.654) (1.968) SKX-L M xM (1151) (2921) (11.28) (6.61) (708) (4.094) (3.307) (0.071) (1.260) (1.654) (1.968) SKX-L M xM (1770) (4425) (36.56) (13.23) (1947) (5.197) (4.094) (0.098) (1.378) (2.283) (2.559) SKX-L M xM (3098) (7081) (36.56) (13.23) (1947) (5.197) (4.094) (0.098) (1.654) (2.283) (2.559) 114