EA009364B1 - Electromechanical trigger and an electronical safety appliance with the same - Google Patents

Abstract

The present invention relates to an electromagnetic trip device D comprising a cradle (1) supporting U-shaped armature (2) the ends whereof form two polar surfaces operating in conjunction with a vane (3) pivoting with respect to said armature (2), said vane (3) being able to be moved onto said polar surfaces to close the magnetic circuit formed by the armature (2) and vane (3), a trip coil (4) mounted around a shell surrounding the magnetic circuit able to counteract the force of the magnet (6) so as to move the vane(3), said trip device also comprising a resetting pin (7) of the vane (3) mounted sliding in a support (12). This trip device is characterised in that the above-mentioned cradle (1) comprises the above-mentioned support (12) of the pin (7).

Description

BACKGROUND OF THE INVENTION

The present invention relates to an electromagnetic disconnecting device comprising a frame supporting a ϋ-shaped armature, the ends of which form two polar surfaces, acting in connection with the blade, rotatably relative to said armature, said blade being able to move along said polar surfaces to close the magnetic circuit, formed by an anchor and a blade;

a trip coil mounted around a shell surrounding a magnetic circuit that is capable of counteracting the force generated by the magnet so as to move the blade;

returnable blade shaft, mounted with the possibility of sliding in the support.

Currently, the relay shaft is mechanically and functionally connected to the relay blade through several parts, i.e. housing, mounting plate, anchor, coil shell or swivel.

Breaking devices of the aforementioned type, for example, such as the devices described in patents EP 0829895, EP 0786789, EP 0643410 and EP 4110660, in which the rod is supported by the housing.

All these disconnecting devices are equipped with a large number of elements.

For the rod, which should be in the area that allows optimal relay operation, the mentioned elements must correspond to a large number of dimensional tolerances, which reduce the reliability of the relay.

SUMMARY OF THE INVENTION

The present invention solves these problems and provides an electromagnetic tripping device and an electrical protection device comprising a similar device having a reduced number of elements, resulting in improved reliability.

For this purpose, according to an aspect of the present invention, a trip device is provided, characterized in that the aforementioned frame comprises the aforementioned shaft support.

According to a separate feature, the aforementioned frame comprises the aforementioned shell.

According to another characteristic, the frame comprises an element carrying an anchor, a part of which is connected to the shell, said shell being connected to the rod support.

According to another feature, the shell of the coil includes a core containing a longitudinal hole made to accommodate one of the branches of the ϋ-shaped anchor.

According to another feature, the aforementioned hole is defined by two opposite walls of the shell, made to function in conjunction with two opposite surfaces of the aforementioned arm branch.

According to another feature, the frame comprises an element forming a spring fixture molded with said frame.

According to another characteristic, the frame contains grips connected through one of their ends to the winding of the aforementioned coil.

According to another feature, the frame comprises means for positioning and securing the magnet.

According to another feature, the disconnecting device further comprises a metal element soldered to the armature and comprising a spring device.

According to another feature, the aforementioned magnet is soldered to the aforementioned metal element.

According to another feature, the aforementioned element forms a hinged stop of the blade.

According to another feature, this disconnecting device comprises clamping means provided on the frame for releasably securing the armature on the frame.

According to another feature, the frame contains a wall forming a stop when moving the rod.

According to another characteristic, the frame contains an element that interacts tightly with the opening of the housing, made for the passage of the rod.

According to another characteristic, the anchor / frame subassembly is mounted on a mounting plate interacting tightly with the housing.

An additional aspect of the invention is the provision of an electrical protection device, such as a circuit breaker or circuit breaker, comprising a tripping device that includes the aforementioned features, either taken separately or in combination.

Brief Description of the Drawings

Other advantages and features of the invention will become more apparent from the following description with reference to the accompanying drawings, given for illustrative purposes only, and which depict:

FIG. 1 is a side view of a disconnecting device according to the invention;

FIG. 2 is a partial perspective view of the same disconnecting device illustrating a frame and an anchor;

FIG. 3 - bottom view of the frame;

FIG. 4 is a perspective view of the same disconnecting device before installing the housing;

FIG. 5 is a perspective view of the same disconnecting device after installing the housing and before closing the protective cover;

- 1 009364 FIG. 6 is a perspective view of the same disconnecting device after closing the protective cover;

FIG. 7 is a partial perspective view showing another embodiment of a disconnecting device according to the invention;

FIG. 8 is a side view of the same apparatus;

FIG. 9 is a top view of the same apparatus;

FIG. 10 is a perspective view showing another embodiment of a disconnecting device according to the invention, comprising a mounting plate configured to interact with a housing;

FIG. 11 is a perspective view of this disconnecting device after the housing is installed.

Detailed Description of a Preferred Embodiment

In FIG. 1, an electromagnetic disconnecting device Ό comprises a frame 1 carrying a ϋ-shaped anchor 2, the ends of which form two polar surfaces acting in conjunction with the blade 3, which rotates relative to the said armature 2, and said blade 3 can move along the mentioned polar surfaces to close the magnetic circuit formed by the anchor 2 and the blade 3;

a trip coil 4 fixed around a shell 5 surrounding a magnetic circuit, said coil being able to counteract the force of magnet 6 so as to move the blade 3;

the return rod 7 of the blade 3, made to act on the plate 8, mounted on the blade 3 and made to weaken the blow of the return force, and the said rod acts as a disconnecting device of the mechanism of the apparatus in which the relay is installed, as well as a return spring 9 of the blade 3.

The operation of such a disconnecting device Ό will be described later. At rest, there is no current in the coil 4, the blade 3 is stored placed on the valve 2 by the flow generated by the magnet 6. If a current appears in the coil 4, the blade 3 is opened when this current reaches a certain predetermined level, by means of the balance between the torque of the spring 9 and the magnetic torque generated by the flow formed by the magnet 6.

In FIG. 1 and 2, it can be seen that frame 1 comprises a first element 10 carrying an anchor 2 and a magnet 6, as well as a second element 11 cast with a first element forming a shell 5 of a coil 4. According to the invention, frame 1 comprises a support 12 of a rod 7 cast with said first 10 and second 11 elements. This support 12 comprises a first element 13 connected to the shell 5 and extending substantially perpendicular to said shell 5, as well as a second element 14 extending substantially perpendicular to the first element 13 containing an opening 16 for passage of the rod 7.

The shell 5 of the coil 4 contains a core 17, supported by the first element 10 of the frame 1 and containing a longitudinal recess 18, made to accommodate one branch 19 of the branches 19, 20 of the Y-shaped anchor 2, while the other branch 20 of the ϋ-shaped anchor passes through the first element 10 of the frame 1, and this branch 20 of the I-shaped anchor is held by the frame 1 by means of two clamps 21, 22, as shown in FIG. 3. Therefore, the frame 1 positions the armature 2 in the perpendicular direction with the inner surface 23 of the support plane of the armature 2 on the lower surface 24 of the frame 1 in the longitudinal direction by means of the centering elements a, b and laterally by adjusting the sizes 25, 26 of the armature 2 with inner dimensions 27, 28 frames 1.

In FIG. 2, in particular, it can be seen that in order to optimize the copper volume relative to a given volume, to optimize the mechanical and functional compromise between the volume of the coil winding, the number of turns and the magnetic characteristics of the winding, and to achieve the reliability of inserting the armature into the core of the frame with a minimum functional gap, the core of the frame is made no material on the sides.

The frame 1 positions and secures the magnet 6 by adjusting the shape of the magnet 6 and the hole 29 provided in the frame 1, as shown in FIG. 2.

The relay frame 1 also carries clamps 30, which are connected through one end 31 of the ends to the coil 4.

The frame 1, in addition, contains a wall 32 (Fig. 1), forming a stop, allowing the relay to remain functional without a housing or mounting plate, providing support for the blade 3 when it rotates on its hinge to the open position.

The special shape 33 of the frame 1 provides the ability to attach the spring 9.

Referring now to FIG. 4-6, it can be seen that, according to a separate embodiment of the invention, the frame 1 structure, due to its special shape, provides a tight connection of the relay with the housing 34, especially at the level of the upper element 35 of the support 12 of the rod 7, which interacts with the hole 36 provided in the housing 34 .

Referring now to FIG. 7-9, it can be seen that according to a separate embodiment, the disconnecting device Ό furthermore comprises a metal element 37 soldered to the armature 2. The spring gripper shape 38 is obtained by cutting and bending a portion of this metal element 37. The latter also makes it possible to position the magnet 6 due to the shape of its two protrusions 39, 40, provides the possibility of fixing the magnet by soldering and forms the rear hinge stop 41 of the sub-node of the blade plate.

- 2 009364

According to another embodiment of the invention shown in FIG. 10 and 11, the subassembly formed by the armature 2 and the frame 1 is secured to the mounting plate 42, the latter also acting as a cover for the housing 43 engaged with said mounting plate 42. A tight connection is achieved between the mounting plate 42 and the housing 43.

It should be noted that the shell of the coil without material on the sides makes it possible to improve reliability by adjusting the dimensional chain.

Thus, the aforementioned hole 18 in the core 17 is defined by two opposing walls 44, 45 configured to interact with two opposing surfaces 46, 47 of the aforementioned arm 19 of armature 2.

An electromagnetic disconnecting device comprising a frame that guides the rod, therefore, is achieved by the invention, tightly connecting the frame to a housing containing a coil shell carrying coil connectors securing the relay magnetic parts, i.e. magnet and anchor, includes a spring connection and constitutes a mechanical and functional supporting frame of the rod relative to the subassembly containing the armature and relay blade.

Since all these functions are carried out by the frame, this enables the tripping device to be functional without its housing and without a mounting plate. Reliability of the relay increases due to the simplification of the dimensional chain, and this simplification is due to the fact that the frame guides the rod and orientates it relative to the magnetic subassembly composed of the armature and the blade with its plate. The functional subassembly contains a rod, a shell, a coil, connectors, an anchor, a magnet, a hinge stop, a blade, a plate and a spring.

The frame can be obtained by injection molding.

The invention is applied in particular in various circuit breakers and various circuit breakers and in any apparatuses adapted to use a trip device.

The invention, of course, is not at all limited to the described and depicted embodiments, which were given for illustrative purposes only.

On the other hand, the invention extends to cover all technical equivalents of the described means, as well as their combinations, if the latter are made in the framework of the invention.

Claims (16)

CLAIM 1. Electromagnetic disconnecting device containing a frame carrying a ϋ-shaped anchor, the ends of which form two polar surfaces acting in conjunction with a blade turning relative to said armature, moreover, said blade is movable along said polar surfaces to close the magnetic circuit, formed by an anchor and a blade; a cut-off coil mounted inside the shell 5 surrounding a magnetic circuit capable of counteracting the magnet force, so as to move the blade, said disconnecting device also comprising a return shaft of the blade mounted slidably in the support, characterized in that said frame 1 comprises the first part 10 bearing anchor 2, and the second part 11, containing the above-mentioned support 12 of the rod 7. 2. Disconnecting device according to claim 1, characterized in that the aforementioned second part 11 of said frame 1 comprises the aforementioned shell 5. 3. Disconnecting device according to claim 1 or 2, characterized in that the frame 1, comprising the first part 10, which holds the armature 2, is connected to the shell 5, and said shell 5 is connected to the support 12 of the rod 7. 4. Disconnecting device according to any one of claims 1 to 3, characterized in that the shell 5 of the coil 4 includes a core 17 containing a longitudinal hole 18, made to accommodate one branch 19 of the branches 19, 20 of the I-shaped anchor 2. 5. The disconnecting device according to claim 4, characterized in that the aforementioned hole 18 is defined by two opposite walls 44, 45 of the shell 5, arranged to interact with two opposite surfaces 46, 47 of the aforementioned branch 19 of the armature 2. 6. Disconnecting device according to any one of the preceding paragraphs, characterized in that the frame 1 contains an element that holds the spring 9, cast with said frame 1. 7. Disconnecting device according to any one of the preceding paragraphs, characterized in that the frame 1 contains clamps 30 connected to the winding of the above-mentioned coil 4. 8. Disconnecting device according to any one of the preceding paragraphs, characterized in that the frame 1 comprises means for positioning and securing the magnet 6. 9. Disconnecting device according to any one of the preceding paragraphs, characterized in that it contains, in addition, a metal element 37, soldered to the anchor 2 and containing a spring fixture 38. 10. Disconnecting device according to claim 9, characterized in that a magnet 6 is soldered to the above-mentioned metal element 37. - 3 009364 11. Disconnecting device according to claim 9 or 10, characterized in that the above-mentioned metal element 37 forms a hinged support 41 of the blade 3. 12. Disconnecting device according to any one of the preceding paragraphs, characterized in that it contains clamping means 21, 22 provided on the frame 1 for the detachable fixation of the armature 2 on the frame 1. 13. Disconnecting device according to any one of the preceding paragraphs, characterized in that the frame 1 includes a wall 32 forming the stop rod 7 when moving. 14. Disconnecting device according to any one of the preceding paragraphs, characterized in that the frame 1 contains an element 35, tightly mounted in the opening 36 of the housing 34, through which the return rod 7 passes. 15. Disconnecting device according to any one of the preceding paragraphs, characterized in that the subassembly containing the anchor 2 and the frame 1 is installed on the mounting plate 42, interacting tightly with the housing 43. 16. An electrical protection apparatus comprising a disconnecting device according to any one of the preceding claims.