Three-phase magnetic latching relay

Abstract

The utility model discloses a three-phase magnetic latching relay, which comprises a shell, three groups of contact pins extending outwards are arranged on the shell, liquid solder is dispensed into square counter bores on the surfaces of the extending ends of the contact pins and then riveted and fixed by square rivets, and then the riveted parts are subjected to short-time high-temperature heating to solidify the solder. The defects of high riveting resistance, instability and the like possibly caused by pure riveting are overcome, and the defects of poor part surface quality, long production period, low efficiency, unstable bonding strength and the like caused by pure current welding are overcome.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a three-phase magnetic latching relay. Background Art

[0002] The magnetic latching relay is a new type of relay developed in recent years, and is also an automatic switch. Like other electromagnetic relays, it plays the role of connecting and disconnecting the circuit. The difference is that the normally closed or normally open state of the magnetic latching relay is completely dependent on the action of the permanent magnet, and the conversion of its switch state is completed by triggering a pulse electrical signal of a certain width. When the signal disappears, the original switch state can still be maintained for a long time until a new reverse signal appears. Magnetic latching relays are generally divided into single-phase and three-phase.

[0003] At present, the lead pins of the existing three-phase magnetic latching relay and the contact pins of the magnetic latching relay are generally connected by welding or riveting. However, the use of simple riveting has hidden dangers such as high riveting resistance, unstable connection, and increased temperature of the relay pins and internal temperature. The use of simple current welding has defects such as poor surface quality of parts, long production cycle, low efficiency, and unstable bonding strength, which will affect the quality and service life of the three-phase magnetic latching relay. Utility Model Content

[0004] In view of the defects in the prior art, the utility model provides a three-phase magnetic latching relay to solve the technical problems raised in the background technology.

[0005] A three-phase magnetic latching relay comprises a shell having three groups of contact pins extending outwards. The extended end surfaces of the contact pins and the end surface of the lead pins are fixed by riveting with square rivets, and then the riveted parts are heated at high temperature for a short time for welding and fixing.

[0006] Furthermore, there is solder between the extended end surface of the contact pin and the end surface of the lead pin.

[0007] Furthermore, a relay coil is arranged inside the shell, and the relay coil is arranged in the middle position of the three contact groups.

[0008] Further, a group of contact pins includes a movable pin and a static pin which are independently arranged, wherein the static pin is provided with a first contact point inside the housing, and a shunt plate is connected to one end of the movable pin located inside the housing, wherein the shunt plate has a second contact point which is opposite to the first contact point, and the shunt plate is arranged between the movable pin and the static pin;

[0009] A pusher is movably disposed inside the housing for pushing the shunt sheet toward or away from the stationary foot so that the second contact on the shunt sheet is in contact with the first contact to be turned on or off, the pusher is transmission-connected with a magnetic steel, the magnetic steel is rotatably mounted in the housing via a rotating shaft, and the magnetic steel is disposed opposite to the relay coil;

[0010] The pusher has a transmission hole in the middle, the magnetic steel has a driving part on the side opposite to the relay coil, and the end of the driving part has a driving body with a columnar structure, and the driving body movably extends into the transmission hole;

[0011] The pusher is also provided with a plurality of heat dissipation holes, the positions of which correspond to the positions directly above the contact opening positions, which are beneficial to the dissipation of arc heat and the extinguishing of the arc.

[0012] Furthermore, the pushing member is provided with three limiting grooves, and one end of the three diverter plates is respectively clamped in the corresponding limiting grooves.

[0013] Furthermore, the shunt plate is made of copper.

[0014] The beneficial effects of the utility model are embodied in:

[0015] (1) After the extended end surface of the contact pin and the end surface of the lead pin are riveted and fixed by square rivets, they are then welded and fixed by heating the liquid solder at high temperature for a short time, thereby avoiding the shortcomings of high riveting resistance, instability, high temperature rise of the pins, lead pins and the inside of the relay caused by simple riveting, and avoiding the shortcomings of poor surface quality of parts, long production cycle, low efficiency, unstable bonding strength caused by simple current welding; the use of square rivets simplifies riveting tooling and improves production efficiency;

[0016] (2) The relay coil is located in the middle of the three contact groups, which greatly enhances the product's ability to resist external constant magnetic fields and simplifies the shielding cover structure;

[0017] (3) The pusher has heat dissipation holes to dissipate the heat generated by the arc when the relay is disconnected, while reducing its own weight and ensuring sufficient strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0019] The accompanying drawings herein are incorporated into and constitute a part of the specification, illustrate embodiments consistent with the present application, and together with the specification are used to explain the principles of the present application. For ordinary technicians in this field, other accompanying drawings can also be obtained based on these accompanying drawings without paying creative labor.

[0020] Figure 1 A schematic diagram of a three-phase magnetic latching relay provided in an embodiment of the utility model Figure 1 ;

[0021] Figure 2 A schematic diagram of a three-phase magnetic latching relay provided in an embodiment of the utility model Figure 2 ;

[0022] Figure 3 A schematic diagram of the internal structure of a three-phase magnetic latching relay provided in an embodiment of the utility model;

[0023] Figure 4 A schematic diagram of the connection structure between the pusher and the diverter plate provided in an embodiment of the utility model;

[0024] Figure 5 A schematic diagram of the connection structure between the pusher and the magnetic cylinder provided in an embodiment of the utility model;

[0025] Figure 6 A schematic diagram of the structure of a pusher provided in an embodiment of the utility model;

[0026] Figure 7 A schematic structural diagram of a magnetic cylinder provided in an embodiment of the utility model.

[0027] The realization of the purpose, functional features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. The above-mentioned drawings have shown clear embodiments of this application, which will be described in more detail later. These drawings and textual descriptions are not intended to limit the scope of the concept of this application in any way, but to illustrate the concept of this application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0030] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0031] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0032] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] like Figure 1 and Figure 2As shown, the utility model provides a three-phase magnetic latching relay, including a housing 1, on which there are three groups of contact pins 2 extending outward, and the extended end surface of the contact pin 2 is fixed with the surface of one end of the lead pin 3 by riveting with a square rivet 4, and then fixed by welding, thereby avoiding the shortcomings of high riveting resistance, instability, temperature rise and short life caused by simple riveting, and avoiding the shortcomings of poor surface quality of parts, long production cycle, low efficiency and unstable bonding strength caused by simple current welding. There is solder between the extended end surface of the contact pin 2 and the surface of one end of the lead pin 3, and the solder is initially in liquid state and becomes solid after being subjected to a certain temperature; the solder contains a certain proportion of silver molecules with excellent conductive properties, which can improve both the stability of welding and the conductive properties.

[0035] like Figure 3 As shown, a relay coil 5 is arranged inside the housing 1, and the relay coil 5 is arranged in the middle position of the three contact groups, so that the product's ability to resist an external constant magnetic field is greatly enhanced and the shielding cover structure is simplified.

[0036] Specifically, Figure 4 As shown, a group of contact pins 2 includes independently arranged moving pins and stationary pins, the moving pin is provided with a mutual inductor 16 outside the shell 1, the stationary pin is provided with a first contact 6 inside the shell 1, a shunt plate 7 is connected to one end of the moving pin located inside the shell 1, the shunt plate 7 has a second contact 8 opposite to the first contact 6, and the shunt plate 7 is arranged between the moving pin and the stationary pin.

[0037] The housing 1 is provided with a pusher 9 for pushing the shunt plate 7 toward or away from the stationary foot so that the second contact 8 on the shunt plate 7 is in contact with the first contact 6 to be turned on or off. Figure 3 and Figure 5 As shown, the pusher 9 is transmission-connected with the magnet 10 , and the magnet 10 is rotatably installed in the housing 1 via a rotating shaft 11 . The magnet 10 can rotate around the rotating shaft 11 , thereby pushing the pusher 9 to reciprocate along the length direction of the housing 1 , and the magnet 10 is arranged opposite to the relay coil 5 .

[0038] The magnetic steel 10 contains a permanent magnet. When the contacts of the relay need to be opened or closed, it is only necessary to excite the relay coil 5 with a positive (negative) DC pulse voltage. The magnetic poles generated by the relay coil 5 after excitation interact with the magnetic poles of the permanent magnet in the magnetic steel 10. The same polarities repel each other and the opposite polarities attract each other. The magnetic steel 10 rotates around the rotating shaft 11 to push the pusher 9 to move along the length direction of the housing 1, so that the relay completes the state conversion from reset to set in an instant. Usually, when the contacts are in the holding state, the coil does not need to continue to be energized, and the magnetic force of the permanent magnet alone can maintain the state of the relay unchanged.

[0039] like Figure 6 As shown, the pusher 9 has a transmission hole 12 in the middle. Figure 5 , Figure 6 , Figure 7 As shown, the magnetic steel 10 has a driving part on the side opposite to the relay coil 5, and the end of the driving part has a driving body 13 with a columnar structure. The driving body 13 movably extends into the transmission hole 12. A plurality of heat dissipation holes 14 are also distributed on the pushing member 9. The heat dissipation holes 14 can dissipate the heat generated by the circuit when the first contact 6 and the second contact 8 inside the relay are disconnected, which is beneficial to the extinction of the arc, while reducing its own weight and ensuring sufficient strength.

[0040] Specifically, Figure 4 and Figure 6 As shown, the pusher 9 has three limit slots 15, and one end of the three shunt sheets 7 is respectively clamped in the corresponding limit slots 15, and the shunt sheet 7 is driven to move through the limit slots 15. The shunt sheet 7 is made of copper material, and the shunt sheet 7 is elastic, so that when the pusher 9 pushes the shunt sheet 7 close to the stationary foot, the second contact 8 and the first contact 6 are more stably in contact.

[0041] Finally, it should be noted that the various technical features of the technical solution of the present application can be combined arbitrarily. In order to make the description concise, not all possible combinations of the various technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of the present application.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some or all of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and should all be included in the scope of the claims and specification of the present invention.

Claims

1. A three-phase magnetic latching relay, comprising a housing (1), wherein the housing (1) has three groups of contact pins (2) extending outward, characterized in that: The extended end surface of the contact pin (2) and one end surface of the lead pin (3) are riveted and fixed by a square rivet (4), and then the riveted part is heated at high temperature for a short time to be welded and fixed.

2. A three-phase magnetic latching relay according to claim 1, characterized in that: There is solder between the extended end surface of the contact pin (2) and one end surface of the lead pin (3).

3. A three-phase magnetic latching relay according to claim 1, characterized in that: A relay coil (5) is arranged inside the housing (1), and the relay coil (5) is arranged in the middle of the three contact groups.

4. A three-phase magnetic latching relay according to claim 1, characterized in that: A group of contact pins (2) comprises independently arranged movable pins and stationary pins, wherein the stationary pin is provided with a first contact point (6) inside the housing (1), and one end of the movable pin located inside the housing (1) is connected to a shunt plate (7), wherein the shunt plate (7) has a second contact point (8) opposite to the first contact point (6), and the shunt plate (7) is arranged between the movable pin and the stationary pin; A pushing member (9) is movably arranged inside the housing (1) for pushing the shunt plate (7) toward or away from the stationary foot so that the second contact (8) on the shunt plate (7) is in contact with the first contact (6) to be turned on or off, the pushing member (9) being transmission-connected to a magnetic steel (10), the magnetic steel (10) being rotatably mounted inside the housing (1) via a rotating shaft (11), and the magnetic steel (10) being arranged opposite to the relay coil (5); The pusher (9) has a transmission hole (12) in the middle, the magnetic steel (10) has a driving part on the side opposite to the relay coil (5), and the end of the driving part has a driving body (13) with a columnar structure, and the driving body (13) movably extends into the transmission hole (12); The pushing member (9) is also provided with a plurality of heat dissipation holes (14).

5. A three-phase magnetic latching relay according to claim 4, characterized in that: The pushing member (9) is provided with three limiting grooves (15), and one end of the three flow dividing sheets (7) is respectively clamped in the corresponding limiting grooves (15).

6. A three-phase magnetic latching relay according to claim 4, characterized in that: The shunt plate (7) is made of copper.

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