A monostable permanent magnetic operating mechanism

Abstract

A monostable permanent magnet operating mechanism. It is characterized in that: the cross-sections of the upper support part and the lower support part of the coil frame are regular polygons, and each side of the upper support part is provided with a mounting groove, the permanent magnet is adapted to the mounting groove and is respectively embedded in the mounting groove, the yoke is a regular polygon adapted to the coil frame and is sleeved outside the coil frame, and its inner wall is kept in contact with the permanent magnet; the iron core is arranged below the coil frame and is fixedly connected to the yoke; the armature is arranged above the coil frame and extends into the guide hole to slide up and down with it; the opening spring can keep the armature in the opening position. Its advantage is that the yoke is arranged in a regular polygon, and a plurality of permanent magnets are respectively installed in the mounting grooves of the upper support part of the coil frame to form a circumferential uniform distribution, which is very convenient for installation; at the same time, the permanent magnet is transmitted to the iron core through the yoke, thereby forming a strong permanent magnetic field, ensuring reliable magnetic holding force after being attracted with the armature, which is stable and reliable.

Description

Technical Field

[0001] The invention relates to a permanent magnet molded case circuit breaker, and in particular to a monostable permanent magnet operating mechanism. Background Art

[0002] As a new type of mechanism that replaces the traditional spring energy storage linkage mechanism, the permanent magnet operating mechanism has a very simple structural unit, which is mainly composed of permanent magnets, coils, yokes, armatures, springs, etc. Compared with the traditional spring energy storage linkage mechanism, it has the advantages of fast action speed, stable operation, reliable action, and long durability.

[0003] Therefore, how to further simplify the structure of the permanent magnet mechanism and improve its operating performance has always been a research and improvement direction for those skilled in the art. Summary of the invention

[0004] In order to overcome the shortcomings of the background technology, the present invention provides a monostable permanent magnet operating mechanism.

[0005] The technical solution adopted by the present invention is as follows: a monostable permanent magnetic operating mechanism, comprising a coil frame, a coil, a permanent magnet, a yoke, an iron core, an armature, and a trip spring; the coil frame comprises a winding part and an upper support part and a lower support part arranged in parallel at the upper and lower ends of the winding part, a guide hole penetrating from top to bottom is formed in the center of the coil frame, the cross-sections of the upper support part and the lower support part are the same, both are regular polygons, and each side of the upper support part is provided with a mounting groove; the coil is wound on the winding part; the permanent magnet is adapted to the mounting groove and is respectively embedded in the mounting groove; the yoke is a regular polygon adapted to the coil frame and is sleeved outside the coil frame, and its inner wall keeps contact with the permanent magnet; the iron core is arranged below the coil frame and fixedly connected to the yoke; the armature is arranged above the coil frame, the lower end of the armature extends into the guide hole, and cooperates with the upper and lower sliding; the trip spring can drive the armature upward and keep the armature in the trip position.

[0006] The installation slot is a square slot, and the permanent magnet is correspondingly square.

[0007] The regular polygon is a regular octagon, and eight permanent magnets are correspondingly arranged.

[0008] An annular groove is provided on the upper end surface of the upper support portion, an annular boss is formed outside the armature, and the opening spring is sleeved outside the armature, with its lower end embedded in the annular groove and its upper end abutting against the annular boss.

[0009] The opening spring is a tower-shaped spring.

[0010] A protrusion protruding upward is provided in the middle of the iron core, and the protrusion extends into the guide hole.

[0011] The iron core is in the same regular polygon as the lower support part, the side walls of the iron core are evenly distributed with clamping platforms, the lower end of the yoke is formed with a clamping groove adapted to the clamping platform, and the clamping platform is embedded in the clamping groove.

[0012] The beneficial effects of the present invention are as follows: by adopting the above scheme, the yoke is set to a regular polygon, and a plurality of permanent magnets are respectively installed in the mounting grooves of the upper support portion of the coil frame to form a circumferentially uniform distribution, which is very convenient for installation; at the same time, the permanent magnet is magnetically transmitted to the iron core through the yoke, thereby forming a strong permanent magnetic field, ensuring reliable magnetic holding force after being attracted to the armature, which is stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional diagram of a monostable permanent magnetic operating mechanism according to an embodiment of the present invention.

[0014] Figure 2 It is a cross-sectional view of a monostable permanent magnetic operating mechanism according to an embodiment of the present invention.

[0015] Figure 3 for Figure 2 Sectional view of AA.

[0016] Figure 4 It is an exploded view of the monostable permanent magnetic operating mechanism according to an embodiment of the present invention.

[0017] Figure 5 Schematic diagram of the structure of the coil skeleton according to an embodiment of the present invention.

[0018] Figure 6 Schematic diagram of the structure of a magnetic yoke according to an embodiment of the present invention.

[0019] Figure 7 Schematic diagram of the structure of the iron core according to an embodiment of the present invention.

[0020] Figure 8 Schematic diagram of the structure of the armature according to an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The embodiments of the present invention are further described below in conjunction with the accompanying drawings:

[0022] As shown in the figure, a monostable permanent magnetic operating mechanism includes a coil frame 1, a coil 2, a permanent magnet 3, a yoke 4, an iron core 5, an armature 6, and a trip spring 7.

[0023] The coil skeleton 1 includes a winding portion 11 and an upper support portion 12 and a lower support portion 13 which are arranged in parallel at the upper and lower ends of the winding portion 11. A guide hole 14 is formed in the center of the coil skeleton 1 and passes through the upper and lower ends. The cross-sections of the upper support portion 12 and the lower support portion 13 are the same and are both regular polygons. A mounting groove 15 is provided on each side of the upper support portion 12.

[0024] The coil 2 is wound on the winding portion 11 .

[0025] The permanent magnets 3 are adapted to the installation slots 15 and are respectively embedded in the installation slots 15 to form a layout evenly distributed along the center circumference of the coil skeleton 1 .

[0026] The yoke 4 is in the shape of a regular polygon that matches the coil frame 1 and is sleeved outside the coil frame 1 , and its inner wall is in contact with the permanent magnet 3 .

[0027] The iron core 5 is arranged below the coil frame 1 and is fixedly connected to the yoke 4 .

[0028] The armature 6 is arranged above the coil frame 1, and the lower end of the armature 6 extends into the guide hole 14 and slides up and down therewith.

[0029] The opening spring 7 can drive the armature 6 upwards and keep the armature 6 in the opening position.

[0030] In the above-mentioned monostable permanent magnetic operating mechanism, the yoke 4, the upper support part 12 and the lower support part 13 of the coil frame 1 are all arranged to be regular polygons, and a plurality of permanent magnets 3 are respectively installed in the mounting grooves 15 of the upper support part 12 of the coil frame 1 to form a circumferentially uniform distribution. During installation, it is only necessary to embed the permanent magnets 3 one by one into the mounting grooves 15, then put on the yoke 4, install the iron core 5, the armature 6 and the opening spring, and the installation is very convenient.

[0031] The working principle of the above-mentioned monostable permanent magnetic operating mechanism is as follows: the permanent magnet 3 conducts magnetism through the yoke 4 and transmits it to the iron core 5, so that the iron core 5 can form a strong permanent magnetic field. When in the open state, a certain gap is maintained between the armature 6 and the iron core 5, so the iron core 5 has a small suction force on the armature 6, which can be balanced with the elastic force provided by the opening spring 7, thereby maintaining the open position; when closing the switch, a positive current is passed through the coil 2, and the magnetic field generated by the coil drives the armature 6 to move downward until it contacts the iron core 5. When the armature 6 contacts the iron core 5, the iron core 5 can firmly attract the armature 6, thereby maintaining the closed position; when opening the switch, a reverse current is passed through the coil, and the magnetic field generated by the coil drives the armature 6 to move upward and separate from the iron core 5, returning to the open position.

[0032] In addition, the installation groove 15 is a square groove, and the permanent magnet 3 is correspondingly square. The square shape can be a square or a rectangle. The square structure is more convenient for production and processing.

[0033] The regular polygon is a regular octagon, and eight permanent magnets 3 are correspondingly arranged. Of course, the regular polygon is not limited to a regular octagon. The number of sides and the number of permanent magnets can be increased or decreased according to the requirements for magnetic field attraction in actual products. The more permanent magnets there are, the stronger the magnetic field is, and the fewer permanent magnets there are, the weaker the magnetic field is.

[0034] The upper end surface of the upper support portion 12 is provided with an annular groove 16, and an annular boss 61 is formed outside the armature 6. The opening spring 7 is sleeved outside the armature 6, and its lower end is embedded in the annular groove 16, and the upper end is against the annular boss 61. This structure not only forms a reliable positioning for the spring, but also reduces the overall length dimension, thereby further reducing the volume.

[0035] Furthermore, the opening spring 7 is a tower-shaped spring, which not only has a strong load capacity and stable operation, but also further reduces the volume.

[0036] The iron core 5 is provided with an upwardly protruding protrusion 51 in the middle, and the protrusion 51 extends into the guide hole 14, so that the center of the iron core 5 corresponds to the position of the armature, the magnetic field is more concentrated, the magnetic field holding force is more reliable when attracted, and the overall performance is further improved.

[0037] The iron core 5 is a regular polygon having the same shape as the lower support portion 13 , and the side walls of the iron core 5 are evenly distributed with clamping platforms 52 . The lower end of the yoke 4 is formed with a clamping groove 41 adapted to the clamping platform 52 . The clamping platform 52 is embedded in the clamping groove 41 , which further facilitates the fixed connection between the iron core 5 and the yoke 4 .

[0038] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0040] Technical personnel should note that although the present invention has been described according to the above specific implementation methods, the inventive concept of the present invention is not limited to this invention, and any modification using the inventive concept will be included in the scope of protection of this patent.

Claims

1. A monostable permanent magnetic operating mechanism, characterized in that: It comprises a coil frame (1), a coil (2), a permanent magnet (3), a yoke (4), an iron core (5), an armature (6), and a brake opening spring (7); The coil frame (1) comprises a winding portion (11) and an upper support portion (12) and a lower support portion (13) arranged in parallel at the upper and lower ends of the winding portion (11); a guide hole (14) penetrating from top to bottom is formed in the center of the coil frame (1); the cross-sections of the upper support portion (12) and the lower support portion (13) are the same and are both regular polygons; and a mounting groove (15) is provided on each side surface of the upper support portion (12); The coil (2) is wound on the winding portion (11); The permanent magnets (3) are adapted to the mounting grooves (15) and are respectively embedded in the mounting grooves (15); The magnetic yoke (4) is in the form of a regular polygon that matches the coil frame (1) and is sleeved outside the coil frame (1), with its inner wall in contact with the permanent magnet (3); The iron core (5) is arranged below the coil frame (1) and is fixedly connected to the magnetic yoke (4); The armature (6) is arranged above the coil frame (1), and the lower end of the armature (6) extends into the guide hole (14) and slides up and down with the guide hole (14); The opening spring (7) can drive the armature (6) upwards, thereby keeping the armature (6) in the opening position.

2. A monostable permanent magnetic operating mechanism according to claim 1, characterized in that: The mounting groove (15) is a square groove, and the permanent magnet (3) is correspondingly square.

3. The monostable permanent magnetic operating mechanism according to claim 1, characterized in that: The regular polygon is a regular octagon, and eight permanent magnets (3) are correspondingly arranged.

4. The monostable permanent magnetic operating mechanism according to claim 1, characterized in that: An annular groove (16) is provided on the upper end surface of the upper support portion (12), an annular boss (61) is formed outside the armature (6), and the opening spring (7) is sleeved outside the armature (6), with its lower end embedded in the annular groove (16) and its upper end abutting against the annular boss (61).

5. A monostable permanent magnetic operating mechanism according to claim 4, characterized in that: The opening spring (7) is a tower-shaped spring.

6. The monostable permanent magnetic operating mechanism according to claim 1, characterized in that: A protrusion (51) protruding upward is provided in the middle of the iron core (5), and the protrusion (51) extends into the guide hole (14).

7. The monostable permanent magnetic operating mechanism according to claim 1, characterized in that: The iron core (5) is in the same regular polygonal shape as the lower support portion (13); side walls of the iron core (5) are evenly distributed with clamping platforms (52); a clamping groove (41) adapted to the clamping platform (52) is formed at the lower end of the magnetic yoke (4); and the clamping platform (52) is embedded in the clamping groove (41).

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