Electrical actuator for swing and similar gates

• US 20050022453A1
• Filed: 07/28/2003
• Published: 02/03/2005
• Est. Priority Date: 07/28/2003
• Status: Active Grant

• Current Assignee: Rib Srl
• Original Assignee: Rib Srl
• Inventors: Bosio, Giuseppe
• Granted Patent: US 7,000,353 B2
• Time in Patent Office: Days
• US Class Current: 49/343
• CPC Class Codes: E05F 15/603 using rotary electromotors
• CPC Class Codes: E05F 15/622 using screw-and-nut mechanisms
• CPC Class Codes: E05Y 2201/216 Clutches
• CPC Class Codes: E05Y 2201/244 by manual operation
• CPC Class Codes: E05Y 2800/25 Emergency conditions
• CPC Class Codes: E05Y 2900/40 for gates

Abstract

The invention concerns a command and release device for an electrical actuator for swing gates, that includes a transmission joint comprised of a coupling with frontal teeth (20,21) inserted between the output shaft of gear motor and a worm screw (14) and a release element (24). This element is associated in a radial way to the said coupling so that it can be manually released in an emergency. The release element is comprises an eccentric pin that engages the coupling element in a radial way that can be moved from an engagement position to a release position by being turned by a lock barrel (26) with its key.

Claims

1. An electrical actuator for swing gates with a command and release device, comprising, inside a casing or protection housing (11), a non-reversible electrical gear motor (12) actuating via a transmission joint (13) the rotation of a non-reversible worm screw (14) that engages a nut screw (15), and where the nut screw has an axially translating cylinder or rod (16) connected thereto, which in turn is fixed to the swing gate to be commanded through a drive pin (18) located on a distal end of said cylinder or rod, characterized in that said transmission joint comprised of a coupling with frontal teeth (20, 21) inserted between an output shaft (121) of the gear motor (12) and the worm screw (14) and in that a release element (24) is associated in a radial manner to the said coupling for a manual disengagement of the device in the case of emergency.

2. The actuator according to claim 1, in which the said transmission joint (13) is comprised of a drive element (20) keyed onto and sliding directly or indirectly on the output shaft (12) of the gear motor (12) and a drive element (21) fixed to a proximal end of the worm screw (14), and where the drive and driven elements (20, 21) both have frontal teeth (22) for reciprocal engagement when they are close and for disengagement when moved apart.

3. The actuator according to claim 1, in which a thrust spring (23) is associated to the drive element (20) to keep the two elements (20, 21) of the coupling in the engaged condition, and in which the release element (24) is coupled to the said drive element to move it away from the driven element and to disengage the coupling.

4. The actuator according to claim 3, in which the release element is comprised by an eccentric pin (24) associated with an annular groove (25) on the periphery of the drive element, said eccentric pin being rotatable from a engagement position to a release position of the coupling through the rotation of a lock barrel (26) by a respective key, that can be of the lobe, security type or similar.

9. The actuator according to claim 2, in which a thrust spring (23) is associated to the drive element (20) to keep the two elements (20, 21) of the coupling in the engaged condition, and in which the release element (24) is coupled to the said drive element to move it away from the driven element and to disengage the coupling.

5. An electrical actuator for swing gates comprising, inside a casing or protection element (11), a non-reversible electrical gear motor (12) actuating via a transmission joint (13) the rotation of a non-reversible worm screw (14), that engages a nut screw (15) to which an axially translating cylinder or rod is connected (16) which in turn is fixed to the swing gate to be commanded through a drive pin (18) located on a distal end of said rod, wherein the transmission joint comprises a coupling with frontal teeth (20, 21) inserted between an output shaft (12′

) of the gear motor and the worm screw (14), and a release element (24) associated in a radial manner to the said coupling for a manual disengagement of the device in the case of emergency;

said this coupling being comprised of a drive element (20), keyed onto and sliding directly or indirectly on said output shaft (12′

) of the gear motor (12) and a driven element (21) fixed to a proximal end of the worm screw (14) with the drive and driven elements (20, 21) both having frontal teeth (22) for reciprocal engagement when they are close under the action of a spring and for release from each other when they are moved away from the release element; and

said release element being comprised of an eccentric pin (24) that engages an annular groove (25) in a radial way arranged around the drive element movable between an engagement position and a release position of the coupling through the rotation of a lock barrel (26) by a respective key that can be of the lobe, security type or similar.

6. The actuator according to claim 5 wherein:

said casing or protection housing is provided with horizontal guides (122) in a horizontal direction; and

said translating rod or cylinder is centered and slides at one part in a stationary entering collar (120) and in another part is provided with lateral guides (123), that engage with the horizontal guides (122) inside the casing or protection housing to support the rod or the cylinder throughout its entire translation stroke.

7. The electrical actuator according to claim 6, wherein the said horizontal guide elements (122) are comprised of ribs integral to one part of the casing or protective housing extending along the same in correspondence with said rod or cylinder.

8. The electrical actuator according to claim 6, wherein the said centering collar (120) is withheld axially in the casing or protective housing and wherein the said lateral guides (123) of the rod or cylinder (16) are on opposite sides to a head located at the distal end of the rod or cylinder itself

10. The electrical actuator according to claim 7, wherein the-said centering collar (120) is withheld axially in the casing or protective housing and wherein the said lateral guides (123) of the rod or cylinder (16) are on opposite sides to a head located at the distal end of the rod or cylinder itself