| 摘要 |
A BRAKING MECHANISM FOR A GATE OPERATOR ABSTRACT IN A GATE OPERATOR SYSTEM, THE EXPOSED END OF A GEAR SPINDLE (')')) AND THE EXPOSED END OF A MOTOR SHAFT (31 1) FROM A GEAR MOTOR Q 12) ARE CORRESPONDINGLY CONFIGURED, SO THAT THEY 5 COOPERATE WITH EACH OTHER. THE EXPOSED END OF THE GEAR SPINDLE (33) PASSES THROUGH A LEVELING MEANS (50) CARRYING TWO BEARING MEANS (51, 52) AND A TAKE-OFF COVER BLOCK (40) TO ENGAGE A POWER DRIVE SECTION (31) INCLUDING A GEAR MOTOR (312) WITH A MOTOR SHAFT (3 I 1). ACCORDING TO THE PRESENT INVENTION, A BRAKING MECHANISM TAKES THE FORM OF A SPRING- 10 LOADED BRAKE BUSH (61, 60) AND AN OPTIONAL BRAKE PLATE (65) WHICH ARE APPLIED TO THE EXPOSED END OF THE GEAR SPINDLE (33). AL A FREE POSITION, THE BRAKE BUSH (60) AND/OR THE BRAKE PLATE (65) ARE LIFTED OFF THE ADJACENT CONTACT FACE OF THE LEVELING MEANS @50) HOLDING THE EXPOSED END OF THE GEAR SPINDLE (33)). THE GEAR SPINDLE (33) IS ALLOWED TO ROTATE. AT A BRAKING POSITION, THE BRAKE BUSH (60) AND/OR BRAKE PLATE (65) ARE PRESSED AGAINST THE 15 CONTACT FACE OF THE LEVELING MEANS (50) AND THE GEAR SPINDLE (33) IS PREVENTED FROM ROTATING. AS AN IMPROVEMENT FEATURE. THE ADJACENT CONTACT FACE OF THE LEVELING MEANS (50) IS PROVIDED WITH A LOCKABLE ROTATING RING (70). AT AN ENGAGED POSITION, THE ROTATING RING (70) IS LOCKED BY A LOCKING SCREW (73) APPLIED THROUGH AN ELONGATED OPENING (74) IN THE 20 CIRCUMFERENCE OF THE LEVELING MEANS (50). AT THE BRAKING POSITION, THE BRAKE BUSH (60) WILL PREVENT THE GEAR SPINDLE (33) FROM ROTATING. AT A FREE POSITION, THE LOCKING SCREW (73) IS RELEASED AND THE ROTATING RING (70) IS FREELY ROTATING WITH THE ASSISTANCE OF FOUR STEEL BALLS (71). THIS ROTATING RING (70) WILL ALLOW THE GEAR SPINDLE (33)) TO ROTATE FREELY. (FIGURE 6B)
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