CN117976468A - Magnetic circuit part, magnetic latching relay and ammeter - Google Patents
Magnetic circuit part, magnetic latching relay and ammeter Download PDFInfo
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- CN117976468A CN117976468A CN202410315799.7A CN202410315799A CN117976468A CN 117976468 A CN117976468 A CN 117976468A CN 202410315799 A CN202410315799 A CN 202410315799A CN 117976468 A CN117976468 A CN 117976468A
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Abstract
The application discloses a magnetic circuit part, a magnetic latching relay and an ammeter. Wherein the magnetic circuit portion includes an armature assembly and a coil assembly; the armature assembly comprises a permanent magnet piece and two armatures, the two armatures are fixedly connected with two magnetic poles of the permanent magnet piece respectively, projections of the two armatures on a first projection plane perpendicular to the Z-axis direction are crossed with each other, and the crossed parts are arranged at intervals along the Z-axis direction; the coil assembly is provided with two magnetic driving ends which are distributed along the X-axis direction, and the coil assembly is excited by the pulse electric signal to reverse the polarity formed temporarily by the two magnetic driving ends so as to drive the armature assembly to move along the Y-axis direction. The magnetic latching relay and the ammeter include the above-described magnetic circuit portion. Compared with the prior art, the technical scheme creates more favorable conditions for increasing the safety distance between the movable contact and the static contact in a limited space.
Description
Technical Field
The application relates to the field of relays, in particular to a magnetic circuit part, a magnetic latching relay and an ammeter.
Background
In the current society, along with the vigorous development of the internet of things, intelligent electric meters are becoming more and more popular. The smart meter generally integrates a wiring unit, a communication unit, a measurement unit, a control unit and an execution unit in a case. The relay is used as a main component of the execution unit, is controlled by the control unit and acts on the wiring unit to switch on and off an external circuit. In order to save electricity, a magnetic latching relay is generally adopted as a relay in the intelligent ammeter. Because of the limited space and high integration in the case, the relay can occupy very limited space in the case. Because the smart meter often requires an external three-phase alternating current, the relay is typically provided with three contact sets for on-off control of one of the phases of the circuit. Each contact group comprises a movable contact group and a static contact group. Each movable contact group comprises one or more movable contacts, and each static contact group comprises one or more static contacts. Meanwhile, the intelligent ammeter also provides higher requirements on the load capacity of the magnetic latching relay. In order to adapt to the improvement of the load capacity, the safety distance between the movable contact and the static contact needs to be correspondingly increased, and for a common relay in which the movable contact and the static contact respectively lead out of the load terminals, the safety distance between the movable contact and the static contact is a gap between the movable contact on the movable contact and the static contact on the static contact when the relay is in an off state.
The magnetic latching relay in the prior art is generally divided into two types of swing type magnetic latching relay and direct-acting type magnetic latching relay. However, it is difficult to increase the safety distance between the movable contact and the stationary contact in a limited space in both of the magnetic latching relays of the related art.
The swing type magnetic latching relay includes a housing, a magnetic circuit portion, a pushing portion, and a contact portion. The magnetic circuit portion includes a coil assembly fixed relative to the housing and an armature assembly that swings relative to the housing. The coil assembly generally includes a coil winding, an iron core, and two yokes. The iron core is arranged in the coil winding, two yokes are fixedly connected to two ends of the iron core, one ends of the two yokes, which are far away from the iron core, form two magnetic driving ends, and the two magnetic driving ends are distributed along a first direction. The armature assembly comprises a permanent magnet piece and two armatures, wherein the permanent magnet piece and the two armatures are in I-shaped layout, and the two armatures are parallel to each other and clamp the permanent magnet piece in the armature assembly. The coil assembly is excited by the pulse electric signal to reverse the polarity temporarily formed by the two magnetic driving ends so as to drive the armature assembly to swing around a rotation axis perpendicular to the first direction relative to the accommodating piece. The pushing part comprises a swing rod and a pushing card, the swing rod is fixedly connected with the armature assembly, the armature assembly drives the swing rod to swing around the rotation axis and toggles the pushing card to move along the tangential straight line of the swing stroke, so that the movable contact piece in the contact part is abutted against or far away from the static contact piece, and the external circuit is correspondingly switched on or off. In the technical scheme, only tangential components of the swing stroke of the swing rod can be transmitted to the pushing card, and the radial components of the swing stroke of the swing rod are lost. At this time, if the safety distance between the movable contact and the stationary contact needs to be increased, the linear motion stroke of the push card needs to be increased, and accordingly, the tangential component in the swing stroke of the swing rod needs to be increased. In order to increase the tangential component of the swing stroke of the swing rod, one scheme is to lengthen the radial length of the swing rod, and the other scheme is to increase the rotation angle of the swing rod. Either approach can result in increased space required for the swing rod to swing and greater loss of radial component of the swing stroke of the armature assembly. Therefore, for the swing type magnetic latching relay, in order to increase the safety distance between the movable contact and the stationary contact, not only the volume of the magnetic latching relay needs to be increased, but also the magnetic driving force between the magnetic driving end and the armature assembly needs to be increased, and the loss of the radial component of the magnetic driving force also increases, which in turn causes the increase of the energy consumption of the magnetic latching relay and the increase of the volume and the weight of the permanent magnet, so that the volume of the swing type magnetic latching relay needs to be further increased. For the above reasons, it is difficult to satisfy the requirement of increasing the safety distance between the movable contact and the stationary contact in a limited space in the swing type magnetic latching relay in the prior art.
The direct-acting type magnetic latching relay in the prior art also includes a receiving member, a magnetic circuit portion, a pushing portion, and a contact portion. The magnetic circuit part comprises a coil winding, a static iron core, a yoke iron plate, a yoke iron cylinder, a permanent magnet piece and a movable iron core. The coil winding, the static iron core, the yoke iron plate, the yoke iron cylinder and the permanent magnet piece are fixedly connected to the accommodating piece, the movable iron core moves linearly relative to the shell between the yoke iron plate and the static iron core, the pushing part comprises a pushing rod fixedly connected with the movable iron core, the pushing rod moves linearly along with the movable iron core and drives the movable contact piece in the pushing clamp contact part to abut against or be far away from the static contact piece, and an external circuit is correspondingly conducted or turned off. In the technical scheme, the coil winding is arranged along the movement direction of the push rod, the movable iron core also moves between the yoke plate and the static iron core along the movement direction of the push rod, and the movable contact is arranged at the part of the push rod extending out of the yoke plate, so that the length of the direct-acting magnetic latching relay in the prior art along the movement direction of the push rod is greatly increased compared with that of the swinging magnetic latching relay. If the distance between the movable contact and the static contact needs to be increased, the length of the direct-acting magnetic latching relay in the prior art needs to be increased. Therefore, although the direct-acting magnetic latching relay in the prior art does not have the problem of loss of the radial component of the swinging stroke of the swinging magnetic latching relay, because the length of the coil winding and the stroke of the pushing rod need to be increased in order to increase the safety distance between the movable contact and the static contact, the length of the coil winding is further increased, and the requirement of increasing the safety distance between the movable contact and the static contact in a limited space is also difficult to meet.
In addition, the push rod, the movable iron core, the coil winding and the yoke cylinder are sequentially arranged from inside to outside along the radial direction of the direct-acting magnetic latching relay in the prior art, so that the radial dimension of the push rod of the direct-acting magnetic latching relay in the prior art cannot be too thick, otherwise, the radial dimension of the relay is too large. In the prior art, if the direct-acting magnetic latching relay is applied to a smart meter, a plurality of moving contacts are required to be arranged. And because the radial dimension of the pushing rod cannot be too thick, each movable contact piece is difficult to be distributed perpendicular to the moving direction of the pushing rod. This is because, if the movable contacts are arranged along the moving direction of the push rod, the friction forces on both sides along the arranging direction of the movable contacts are difficult to balance, so that a deflection moment for deflecting the push rod relative to the moving direction is formed, and the radial dimension of the push rod cannot be too thick, so that the action point of the deflection moment easily falls outside the push rod body, which causes that the push rod and all the movable contacts are easy to be blocked during linear movement, the service life of the relay is shortened, and the requirement for the magnetic pushing force is further increased. Based on the above reasons, the direct-acting magnetic latching relay in the prior art can only arrange each movable contact element along the movement direction of the push rod, so that the whole relay becomes longer in the movement direction of the push rod, and the requirement of increasing the safety distance between the movable contact element and the static contact element in a limited space is more difficult to meet.
Disclosure of Invention
The present application has been made to overcome the above-mentioned drawbacks or problems occurring in the prior art, and an object of the present application is to provide a magnetic circuit portion, a magnetic latching relay, and an ammeter, which can create more advantageous conditions for increasing a safety distance between a movable contact and a stationary contact in a limited space than a swing type magnetic latching relay or a direct type magnetic latching relay in the prior art.
In order to achieve the above purpose, the following technical scheme is adopted:
A first technical aspect relates to a magnetic circuit portion for a magnetic latching relay, comprising: the armature assembly comprises a permanent magnet piece and two armatures, wherein the two armatures are fixedly connected with two magnetic poles of the permanent magnet piece respectively, projections of the two armatures on a first projection plane perpendicular to the Z-axis direction are crossed with each other, and the crossed parts are arranged at intervals along the Z-axis direction; the coil assembly is provided with two magnetic driving ends which are distributed along the X-axis direction, and the coil assembly is excited by the pulse electric signal to reverse the polarity formed temporarily by the two magnetic driving ends so as to drive the armature assembly to move along the Y-axis direction.
The second technical scheme is based on the first technical scheme, wherein the two armatures are respectively a first armature and a second armature; the first armature is provided with a first suction part and a second suction part, and the second armature is provided with a third suction part and a fourth suction part; the armature assembly moves between a first position and a second position along the Y-axis direction; in the first position, the first suction part and the third suction part are respectively sucked or close to the two magnetic driving ends; in the second position, the fourth engaging portion and the second engaging portion engage or are adjacent to the two magnetic driving ends, respectively.
The third technical scheme is based on the second technical scheme, wherein the first attraction portion and the second attraction portion are respectively located at two ends of the first armature along the X-axis direction; the third suction part and the fourth suction part are respectively positioned at two ends of the second armature along the X-axis direction; the first suction part and the third suction part are arranged along the X-axis direction, and the fourth suction part and the second suction part are arranged along the X-axis direction; the first suction portion and the fourth suction portion are arranged along the Y-axis direction, and the third suction portion and the second suction portion are arranged along the Y-axis direction.
The fourth technical scheme is based on the second technical scheme, wherein when the armature assembly is at the second position, the magnetic latching relay is in a conducting state, and the fourth attraction part and the second attraction part attract the two magnetic driving ends respectively, so that the armature assembly and the coil assembly form a closed magnetic loop.
A fifth technical aspect is based on the first technical aspect, wherein the two magnetic driving ends extend in the X-axis direction to limit movement of the armature assembly from the first position to the second position and/or movement from the second position to the first position.
The sixth technical scheme is based on the first technical scheme, wherein, the coil assembly includes coil winding, iron core and two yokes, the iron core is arranged in the coil, two the yokes respectively with the both ends rigid coupling of iron core, two the magnetism drive end respectively form in two yokes keep away from the one end of iron core.
A seventh technical means is based on the sixth technical means, wherein an axis of the coil winding extends in an X-axis direction.
An eighth technical means is based on the first technical means, wherein the two magnetic stages of the permanent magnet are arranged along the Y-axis direction.
A ninth technical means is the first technical means, wherein both the armatures are provided with a narrower section and a wider section, the width of the narrower section in the Z-axis direction is smaller than the width of the wider section, and the portions intersecting each other are located in the narrower section.
A tenth technical means is based on the ninth technical means, wherein a position at which the armature is fixed to the permanent magnet member is located at the wider section.
An eleventh technical means is based on the ninth technical means, wherein each armature is provided with two wider sections, the two wider sections being located on both sides of the narrower section in the X-axis direction, respectively.
The twelfth technical scheme is based on the eleventh technical scheme, wherein the two armatures are both provided with a thicker portion and a thinner portion, the thickness of the thicker portion is greater than that of the thinner portion, the narrower section is located in the thicker portion, and the thickness is the length of projection of the magnetic conduction section of the armature on the first projection plane.
A thirteenth aspect is based on the twelfth aspect, wherein the wider sections of the armature on both sides of the narrower section have portions located at the thicker portions.
A fourteenth aspect is based on the twelfth aspect, wherein both the armatures include a base sheet and a thickening sheet fixedly connected with the base sheet and attached to the base sheet in a thickness direction to form the thicker portion.
A fifteenth aspect is based on any one of the first to fourteenth aspects, wherein the number of the permanent magnet pieces is at least two and is located on both sides of a portion crossing each other in the X-axis direction, respectively, and each armature is fixedly connected with a pole of the same polarity as each permanent magnet piece.
A sixteenth aspect is based on the fifteenth aspect, wherein the projection of the armature assembly on the first projection plane is mirror-symmetrical with respect to a plane of symmetry perpendicular to the X-axis direction.
A seventeenth technical aspect relates to a magnetic latching relay, comprising: a magnetic circuit portion as set forth in any one of the first to sixteenth aspects; the contact part comprises at least one movable contact group and static contact groups which are the same in number and correspond to the movable contact groups, and the movable contact groups are suitable for abutting against or being far away from the static contact groups so as to switch on or off an external circuit; the pushing part is driven by the armature assembly and drives the movable contact piece group to collide with or be far away from the static contact piece group; and a housing for housing the magnetic circuit portion, the contact portion, and the pushing portion.
An eighteenth technical means is based on the seventeenth technical means, wherein the movable contact group includes at least one movable contact provided with an overcurrent bridge, a first movable contact, and a second movable contact, the first movable contact and the second movable contact being adapted to be electrically connected through the overcurrent bridge; the static contact piece group comprises two static contact pieces, wherein the two static contact pieces are a first static contact piece and a second static contact piece respectively; each first movable contact in the movable contact group is suitable for being abutted against or separated from a first static contact in the corresponding static contact group along the Y-axis direction, and each second movable contact in the movable contact group is suitable for being abutted against or separated from a second static contact in the corresponding static contact group along the Y-axis direction.
A nineteenth technical means is the video display device of the eighteenth technical means, wherein the number of the movable contact groups is at least two.
A twentieth technical means is based on the nineteenth technical means, wherein the number of the movable contact group is three.
A twenty-first aspect is based on the nineteenth aspect, wherein each of the movable contact groups is arranged along the X-axis direction.
A twenty-second technical means is based on the twenty-first technical means, wherein the movable contact group includes at least two movable contacts.
A twenty-third technical solution is based on the twenty-second technical solution, wherein each movable contact element in the movable contact element group is arranged along the Z-axis direction, and the first movable contact point and the second movable contact point of the movable contact element are arranged along the X-axis direction.
A twenty-fourth technical means is based on any one of the nineteenth to twenty-third technical means, wherein the pushing portion includes a pushing card, the pushing card is fixedly connected with the armature assembly, and each of the movable contacts is assembled to and carried by the pushing card.
A twenty-fifth aspect is based on the twenty-fourth aspect, wherein the push card and the armature assembly are insert molded integrally.
A twenty-sixth technical solution is based on the twenty-fifth technical solution, wherein the push card is provided with a receiving portion and a connecting portion, the receiving portion is used for receiving the armature assembly, the connecting portion is used for connecting and carrying each movable contact group, and the connecting portion extends along the X-axis direction.
The twenty-seventh technical scheme is based on the twenty-fourth technical scheme, wherein the accommodating piece is provided with a first guide part, the pushing card is provided with a second guide part, and the first guide part and the second guide part are in sliding fit along the Y-axis direction.
A twenty-eighth technical means is based on the twenty-seventh technical means, wherein the second guide portion is located in a middle portion of the pusher card in the X-axis direction.
A twenty-ninth aspect is based on the twenty-fourth aspect, and further comprising a guide extending in the Y-axis direction; one of the pushing card and the accommodating piece is fixedly connected with the guide piece, and the other one of the pushing card and the accommodating piece is in sliding fit with the guide piece along the Y-axis direction.
A thirty-ninth aspect is based on the twenty-ninth aspect, wherein the number of the guide members is two or more, and each of the guide members is disposed on both sides of the push card in the X-axis direction.
The thirty-first technical means is based on the thirty-first technical means, wherein the accommodating member is provided with two mating portion groups, each mating portion group is used for being fixedly connected or slidingly mated with a corresponding guide member, each mating portion group includes two mating portions arranged along the Y-axis direction, and the position of the guide member slidingly mated or fixedly connected with the push card is located between the two mating portions of the corresponding mating portion group along the Y-axis direction.
The thirty-second technical scheme is based on the twenty-fourth technical scheme, wherein the pushing portion further comprises elastic support groups, the elastic support groups are the same as and correspond to the movable contact groups in number, the elastic support groups are assembled on the pushing card, when the movable contact groups are abutted against the static contact groups, the elastic support groups store energy, and when the movable contact groups are far away from the static contact groups, the elastic support groups release energy.
The thirty-third technical means is based on the thirty-second technical means, wherein the elastic support group includes an elastic support, the elastic support includes a support body and an elastic supporting portion that are integrally connected with each other, the support body is fixed with respect to the push card, the elastic supporting portion is the same as and corresponds to the number of moving contacts in the corresponding moving contact group, and each moving contact in the moving contact group is mounted on the corresponding elastic supporting portion.
A thirty-fourth technical means is based on the thirty-third technical means, wherein the elastic supporting portion includes two elastic arms, both of which are fixedly connected with the overcurrent bridge.
A thirty-fifth technical means is based on the thirty-fourth technical means, wherein the positions at which the two elastic arms are fixedly connected to the overcurrent bridge are located at the back surfaces of the first movable contact and the second movable contact, respectively.
The thirty-sixth technical solution is based on the thirty-third technical solution, wherein the pushing portion further includes a limiting member, the number of the limiting members is the same as and corresponds to the number of the movable contact groups, the limiting member is fixed relative to the pushing card, and when the corresponding movable contact group is far away from the static contact group, the corresponding movable contact group abuts against each movable contact along the Y-axis direction to limit the distance between each movable contact and the static contact group.
The thirty-seventh technical scheme is based on the thirty-sixth technical scheme, wherein the pushing card is provided with a limiting part, the support body is provided with an adapting part, the limiting part is slidably matched with the adapting part along the Y-axis direction and limits the movement of the support body perpendicular to the Y-axis direction, and the limiting part enables the support body to be limited along the Y-axis direction by abutting against each movable contact.
The thirty-eighth technical scheme is based on the twenty-fourth technical scheme, and further comprises an elastic piece, wherein the elastic piece is arranged on the accommodating piece and is suitable for elastically abutting against the pushing card, and the elastic piece stores energy when the movable contact piece group moves in a direction away from the static contact piece group and releases energy when the movable contact piece group moves in a direction close to the static contact piece group.
A thirty-ninth technical means is based on the eighteenth technical means, wherein the contact portion further includes short-circuit resisting units, the number of the short-circuit resisting units is the same as and corresponds to the number of the movable contact groups; the short circuit resisting unit comprises a first magnetizer group fixed relative to the movable contact group and a second magnetizer group fixed relative to the static contact group; the first magnetizer group and the second magnetizer group form a magnetic loop when the movable contact group passes current so that the first magnetizer group and the second magnetizer group attract each other along the Y-axis direction.
A fortieth aspect is based on the thirty-ninth aspect, wherein the first magnetizer set is at least partially located on a back surface of the bridge along the Y-axis direction; in the static contact group, at least one static contact is provided with a reverse overcurrent part, and when the movable contact group passes current, the current direction of the reverse overcurrent part is opposite to the current direction of the overcurrent bridge along the X-axis direction; the second magnetizer group is at least partially positioned between the overcurrent bridge and the reverse overcurrent part along the Y-axis direction.
The fortieth technical scheme is based on the thirty-ninth technical scheme, wherein the first stationary contact is provided with a first stationary contact suitable for the first movable contact to collide, the second stationary contact is provided with a second stationary contact suitable for the second movable contact to collide, and the second magnetizer group is located between the first stationary contact and the second stationary contact along the X-axis direction and is covered by an insulator.
A forty-second aspect is based on the forty-first aspect, wherein the insulator is formed in the accommodating member.
A forty-third technical means is based on the nineteenth technical means, wherein it further includes a barrier portion; the accommodating piece is provided with contact cavities which are the same as the movable contact piece groups in number and correspond to the movable contact piece groups in number, and the contact cavities are used for enabling the corresponding movable contact piece groups to collide with or be far away from the static contact piece groups; the baffle part is fixed relative to the accommodating part or the pushing card and extends along the Y-axis direction; the barrier part is made of insulating materials and is positioned between adjacent contact cavities.
The forty-fourth technical solution is based on the forty-third technical solution, wherein when the movable contact group collides with the static contact group, the blocking part blocks the adjacent contact cavities.
The forty-fifth technical solution is based on the forty-third technical solution, wherein both sides of each contact cavity along the X-axis direction are provided with a blocking portion.
A forty-sixth technical means is the video display device of the forty-third technical means, wherein the blocking portion is formed at the receiving piece or the push card.
The forty-seventh technical scheme is based on the forty-third technical scheme, wherein the barrier portion is made of a high-temperature-resistant insulating material.
The forty-eighth technical means is based on the forty-seventh technical means, wherein the barrier portion is made of a ceramic material.
A forty-ninth aspect relates to an electric meter including the magnetic latching relay as recited in any one of the seventeenth to forty-eighth aspects.
Compared with the prior art, the scheme has the following beneficial effects:
The first technical scheme is an innovative improvement on the magnetic circuit part of the swinging type magnetic latching relay in the prior art. According to the first technical scheme, on the basis of a coil assembly of the swinging type magnetic latching relay, two armatures fixedly connected with a permanent magnet piece are improved from parallel arrangement to mutually crossed parts which are mutually crossed at intervals, so that the armature assembly can swing from a relative coil assembly to be converted into relative coil assembly linear motion.
The first technical solution compares the magnetic circuit part of the swinging type magnetic latching relay in the prior art, and because the armature component moves linearly relative to the coil component, the loss of the radial component of the swinging stroke of the swinging type magnetic latching relay does not exist. Therefore, the space utilization rate of the magnetic latching relay is higher, and more favorable conditions can be created for increasing the safety distance between the movable contact and the static contact in a limited space.
Compared with the magnetic circuit part of the direct-acting magnetic latching relay in the prior art, the magnetic circuit part of the first technical scheme can not lead the relay to need a long length in one direction (whether the X-axis direction or the Y-axis direction) because the two magnetic driving ends are distributed along the X-axis direction and the linear motion direction of the armature assembly is the Y-axis direction perpendicular to the X-axis direction, can lead the relay to be more easily suitable for a limited space, and can create more favorable conditions for increasing the safety distance between the movable contact element and the static contact element in the limited space.
In the magnetic circuit part in the first technical scheme, two armatures in the armature assembly are improved to be crossed with each other on the basis of the coil assembly of the swing type magnetic latching relay, so that a first magnetic circuit part without any air gap can be formed between two attraction ends of the armature assembly through the permanent magnet piece and the two armatures, and a second magnetic circuit part penetrating through the whole coil assembly can also be formed between two magnetic driving ends of the coil assembly, and the first part and the second part can form a complete magnetic circuit in a magnetic latching state or a magnetic driving state, and the complete magnetic circuit can not cause larger magnetic loss due to larger air gap between the two attraction parts of the armature assembly, so that the magnetic loss is smaller, the magnetic efficiency is higher, and the moving stroke of the movable contact piece can be increased under the condition that the power consumption of the coil assembly is not increased; under the condition that the magnetic driving force is equivalent, the power consumption required by the coil assembly for realizing the magnetic driving can be reduced, the coil assembly is beneficial to being smaller in size, and therefore more beneficial conditions can be created for increasing the safety distance between the movable contact and the static contact in a limited space. In addition, in the direct-acting type magnetic latching relay in the prior art, two magnetic loops which are mutually resistant are often formed in a magnetic latching state, one magnetic loop passes through the yoke iron plate, the other magnetic loop passes through the static iron core, and the directions of magnetic acting forces of the two magnetic loops on the movable iron core are opposite, but the complete magnetic loop in the first technical scheme cannot have the problems, so compared with the direct-acting type magnetic latching relay in the prior art, the magnetic acting force in the magnetic latching is larger, and particularly when the relay is impacted by fault heavy current, the armature assembly is not easy to break away from the magnetic latching state to move, so that destructive arc pulling caused by separation of the movable contact and the static contact due to fault current is avoided.
The second technical means is a specific embodiment of the first technical means. In the second technical scheme, under the condition that the armature assembly is in a magnetic holding state when in the first position, when the coil assembly is excited by a pulse electric signal to reverse the polarity temporarily formed by the two magnetic driving ends, not only is the magnetic driving ends generate magnetic repulsive force to the first attraction part and the third attraction part, but also a first part of a pushing magnetic circuit without an air gap is formed between the fourth attraction part and the second attraction part through the armature assembly, the two magnetic driving ends form a second part of the pushing magnetic circuit penetrating through the whole coil assembly through the coil assembly, the first part and the second part of the pushing magnetic circuit form a complete pushing magnetic circuit, only a travel air gap which is necessarily present in the pushing magnetic circuit is not provided with other air gaps, so that the magnetic efficiency is higher, the magnetic driving force of the two magnetic driving ends acting on the armature assembly under the same power consumption is stronger, and the safety distance between a movable contact and a static contact is more favorable to be increased. Similarly, when the armature assembly is in the magnetic holding state at the second position, when the coil assembly is excited by the pulse electric signal to reverse the polarity temporarily formed by the two magnetic driving ends, not only is the magnetic repulsive force generated by the two magnetic driving ends to the fourth attraction portion and the second attraction portion, but also a first part of the push magnetic circuit without an air gap is formed between the first attraction portion and the third attraction portion through the armature assembly, the two magnetic driving ends form a second part of the push magnetic circuit penetrating through the whole coil assembly through the coil assembly, the first part and the second part of the push magnetic circuit form a complete push magnetic circuit, and only the working air gap necessarily caused by the travel of the armature assembly is also formed in the push magnetic circuit, and other air gaps are not formed, so the same technical effect is achieved.
In the second technical scheme, when the armature assembly is in a magnetic holding state at the second position and the movable contact piece is abutted against the static contact piece to enable an external circuit to be conducted, a first part of a holding magnetic circuit without an air gap is formed between the second attraction part and the fourth attraction part through the armature assembly, the two magnetic driving ends form a second part of the holding magnetic circuit penetrating through the whole coil assembly through the coil assembly, the first part and the second part of the holding magnetic circuit form a complete holding magnetic circuit, the holding magnetic circuit is completely closed when the second attraction part and the fourth attraction part attract the two magnetic driving ends, and when the second attraction part and the fourth attraction part are close to the two magnetic driving ends due to other reasons, the air gap is small, so that the magnetic efficiency of the armature assembly in the magnetic holding state can be improved, the attraction force of the magnetic holding is larger, and the reliability is higher. Particularly, when the relay is impacted by fault heavy current, the armature assembly is not easy to break away from a magnetic holding state to move, and damage arc discharge caused by separation of the movable contact piece and the static contact piece due to fault current is avoided.
In the second technical scheme, for the two magnetic driving ends distributed in the X direction, the magnetic fields of the two attraction parts attracted or close to the two magnetic driving ends come from the same permanent magnet piece. Therefore, the magnitude of the magnetic pushing force applied to the armature assembly is equivalent and the difference is small in the process of moving from the first position to the second position or from the second position to the first position. Therefore, the balance of magnetic pushing force is better when the relay is switched on and off, the linear motion of the armature assembly is less prone to deflection, the relay is less prone to jamming, and the service life is longer.
The third technical means is a preferable embodiment of the second technical means. Firstly, because the first attraction part and the second attraction part are respectively positioned at two ends of the first armature along the X-axis direction, and the third attraction part and the fourth attraction part are respectively positioned at two ends of the second armature along the X-axis direction, the fixedly connected position of the first armature and the permanent magnet piece is positioned between the first attraction part and the second attraction part, and the fixedly connected position of the second armature and the permanent magnet piece is also positioned between the third attraction part and the fourth attraction part, the arrangement is such that the magnetic field intensity difference of the two attraction parts of the same armature is smaller, and the magnetic pushing force difference of the coil assembly in two strokes is smaller when the armature assembly is in a magnetic driving state. And secondly, as the first suction part and the fourth suction part are arranged along the Y-axis direction, the third suction part and the second suction part are arranged along the Y-axis direction, the first suction part and the third suction part are arranged along the X-axis direction, and the fourth suction part and the second suction part are arranged along the X-axis direction, the four suction parts of the armature assembly are respectively positioned at the four top positions of the rectangle on the first projection surface, thereby being convenient for adjusting the sizes of the armature assembly along the X-axis direction and the Y-axis direction, and being more beneficial to creating more favorable conditions for increasing the safety distance between the movable contact element and the static contact element in a limited space.
In the fourth technical scheme, the magnetic circuit part forms a closed magnetic loop when the armature assembly is positioned at the second position, and compared with the fourth attraction part and the second attraction part which are only close to the two magnetic driving ends, the magnetic loss of the magnetic circuit part is smaller, the magnetic holding force is stronger, and the capability of resisting fault current impact is stronger.
In the fifth technical scheme, the two magnetic driving ends extend along the X-axis direction to limit the movement of the armature assembly from the first position to the second position and/or the movement from the second position to the first position, so that the movement stroke of the armature assembly along the Y-axis direction is more definite, and the safety distance between the movable contact and the static contact is ensured.
The sixth and seventh aspects are preferred embodiments of the first aspect. The axis of the coil winding is perpendicular to the movement direction of the armature assembly, so that the layout is beneficial to giving up space for the movement of the armature assembly along the Y axis, the whole magnetic circuit part is more compact in structure and smaller in occupied space, and more beneficial conditions are created for increasing the safety distance between the movable contact and the static contact in a limited space. Meanwhile, in the layout, under the condition that other parts of the relay are not more in the axial direction of the coil winding, the limited space is more easily and fully utilized, the axial length of the coil winding is prolonged, and the coil winding can output larger magnetic field intensity, so that the magnetic driving force of the two magnetic driving ends is increased, and more favorable conditions are created for increasing the safety distance between the movable contact and the static contact in the limited space.
In the eighth technical scheme, two magnetic poles of the permanent magnet piece are distributed along the Y-axis direction, compared with the optional arrangement along the X-axis direction or the arrangement along the Z-axis direction, the contact area between the permanent magnet piece and the two armatures is larger, the magnetic conduction effect is better, excessive bending of the two armatures can be avoided, the structural complexity and the manufacturing difficulty of the two armatures can be reduced, and meanwhile, the size of an armature assembly is reduced.
In the ninth technical scheme, the two armatures are provided with the narrower section and the wider section, and the parts crossing each other are positioned on the narrower section, so that the width of the armature assembly along the Z-axis direction is not increased on the premise that the parts crossing each other are arranged at intervals along the Z-axis direction.
In the tenth technical scheme, the position of the fixedly connected armature and the permanent magnet piece is located in a wider section, so that the magnetic field of the permanent magnet piece is more fully guided to the armature, the magnetic acting force between the magnetic driving end and the armature is stronger, the movement stroke of the armature assembly along the Y axis is increased, and the distance between the movable contact piece and the static contact piece is increased.
In the eleventh technical solution, the two wider sections are located at two sides of the narrower section along the X-axis direction, which is favorable for obtaining a larger magnetic conduction section at two sides of the narrower section along the X-axis direction.
In the twelfth technical solution, the thickness of the thicker portion is greater than the thickness of the thinner portion, and the narrower section is located in the thicker portion, so that the magnetic conduction cross section of the narrower section is increased, and the narrower section is not a bottleneck of the magnetic conduction cross section of the armature. Therefore, the magnetic field intensity of the two sides of the cross part of the whole armature along the X-axis direction is more balanced and consistent, so that the magnetic pushing force between the two magnetic driving ends and the armature assembly along the two sides of the X-axis direction is more balanced, the linear motion of the armature assembly is less prone to deflection, and the relay is less prone to jamming and longer in service life.
In the thirteenth technical solution, the wider sections on both sides of the narrower section are both partially located at the thicker section, so that the magnetic conduction section at the junction between the wider section and the narrower section is larger, and the junction is not a bottleneck of the magnetic conduction section of the armature. Therefore, the magnetic field intensity of the two sides of the cross part of the whole armature along the X-axis direction is more balanced and consistent, so that the magnetic pushing force between the two magnetic driving ends and the armature assembly along the two sides of the X-axis direction is more balanced, the linear motion of the armature assembly is less prone to deflection, and the relay is less prone to jamming and longer in service life.
In the fourteenth technical scheme, the thicker part is realized by attaching the thickening piece on the substrate, so that the two armatures can be manufactured by using plates through processes such as sheet metal and the like, the cost is lower, and the manufacturing is more convenient.
In a fifteenth technical solution, the number of permanent magnet pieces is at least two and the permanent magnet pieces are respectively located at two sides of the crossing part, and each armature is fixedly connected with the magnetic pole of the same polarity of each permanent magnet piece. Compared with the technical scheme that only one permanent magnet piece is arranged and the permanent magnet piece can only be positioned at one side of the cross part, the technical scheme is more beneficial to keeping the consistency of the magnetic field intensity of the armature assembly along the two sides of the X-axis direction, the linear motion of the armature assembly is less prone to deflection, and the relay is less prone to jamming and longer in service life.
In the fifteenth technical scheme, permanent magnetic pieces are respectively arranged on two sides of a part where the permanent magnetic pieces are intersected with each other, and under the condition that the sizes of the armature assembly along the Y-axis direction and the Z-axis direction are not increased, the space occupied by the armature assembly is fully utilized to increase the magnetic acting force between the magnetic driving end and the armature assembly, so that the safety distance between the movable contact piece and the static contact piece is more facilitated to be increased. Because each permanent magnet piece is connected together through two armatures, the difference of intensity on the magnetic field of each permanent magnet piece is effectively weakened on two armatures, and the magnetic pushing force between armatures on two sides and the magnetic driving end can be kept balanced along the X-axis direction, so that the relay is less prone to being blocked and has longer service life.
In the fifteenth technical solution, when more than two permanent magnetic pieces are adopted, more than two magnetic loops can be formed between the armature component and the coil component, both in a magnetic holding state and a magnetic driving state, and the magnetic acting force is larger because of superposition of the two magnetic loops, so that the distance between the movable contact piece and the static contact piece is more beneficial to increase compared with the technical solution of only one permanent magnetic piece.
In a sixteenth technical scheme, the projection of the armature assembly on the first projection plane is mirror symmetrical along the symmetry plane perpendicular to the X axis, so that the consistency of the magnetic field intensity of the armature assembly along the two sides of the X axis direction is better, the gravity center is easier to keep on the symmetry plane, the linear motion of the armature assembly is less prone to deflection, and the relay is less prone to jamming and longer in service life.
The seventeenth technical means has technical effects corresponding to the first to sixteenth technical means cited therein.
In the eighteenth technical scheme, each movable contact is provided with an overcurrent bridge, a first movable contact and a second movable contact, and the first static contact and the second static contact are respectively electrically connected with an external circuit, so that the safety distance between the movable contact and the static contact is actually twice the distance between the movable contact and the static contact, and the safety distance between the movable contact and the static contact is increased. This is because, in the present solution, the safety distance between the movable contact and the stationary contact actually refers to the distance that is conducted by the movable contact between the stationary contacts of the two stationary contacts when the movable contact is far from the two stationary contacts, and thus the distance is twice the distance between the movable contact on the actual movable contact and the stationary contact on the stationary contact. In addition, in the technical scheme, the two static contact pieces are respectively electrically connected with an external circuit, and compared with the situation that the movable contact piece and the static contact piece are respectively electrically connected with the external circuit, the electric connection structure is simpler, and the assembly is more convenient.
In the nineteenth technical solution, the number of the movable contact groups is at least two, so that the relay can control the on-off of more external circuits.
In the twentieth technical scheme, the number of the movable contact element groups is three, so that the relay can simultaneously control on-off of each phase of three-phase alternating current, and safety is improved.
In the twenty-first technical scheme, each movable contact element group is distributed along the X-axis direction and is abutted against or far away from the corresponding static contact element group along the Y-axis direction, so that compared with the alternative technical scheme that the distribution direction and the movement direction of the movable contact element groups are the same, the movable contact element group is more beneficial to fully utilizing the limited space and creating more beneficial conditions for increasing the safety distance between the movable contact element and the static contact element; and the static contact element groups corresponding to the movable contact element groups are not shielded in the terminal leading-out direction, so that the static contact element groups are easier to lead out from the side surfaces of the accommodating elements, and copper consumption is saved.
According to the twenty-first technical scheme, the coil assembly with the axis extending along the X-axis direction is free from the contact parts on the two sides of the X-axis direction, so that the coil assembly is abundant in space in the axis direction, the length of the coil assembly can be increased in the X-axis direction according to the requirement under the condition that the overall size of the relay is not increased, the magnetic driving force is improved, and the safety distance between the movable contact and the static contact is increased.
In the twenty-second technical scheme, each movable contact group comprises at least two movable contacts, so that when an external circuit is conducted, current can be carried through the plurality of movable contacts, the number of movable contacts and the number of static contacts are increased, the movable contacts are in parallel connection, the current carrying requirement of each movable contact is reduced, the contact resistance is reduced, and the relay can better improve the load capacity.
In the twenty-third technical scheme, each movable contact element in each movable contact element group is distributed along the Z-axis direction, so that the space in the Z-axis direction is more fully utilized to increase the load capacity. The first movable contact and the second movable contact of each movable contact are distributed along the X-axis direction, the first movable contact and the second movable contact in the corresponding static contact groups are also necessarily distributed along the X-axis direction, and by combining the technical means of the X-axis direction distribution of each movable contact group in the twenty-second technical scheme, all the movable contacts are distributed along the X-axis direction, and a person skilled in the art can reasonably extend all the movable contacts along the Y-axis direction or the Z-axis direction to lead out the load terminal from the accommodating part, so that the layout of each movable contact is more reasonable, the distance between the adjacent movable contacts can be ensured, the limited space can be more favorably fully utilized, and more favorable conditions are created for increasing the safety distance between the movable contacts and the movable contacts. Meanwhile, as all the static contact pieces are distributed along the X-axis direction, the part of the static contact piece, which is led out of the accommodating piece, is easier to install the transformer.
In the twenty-fourth technical scheme, the pushing card is fixedly connected with the armature component, and each movable contact piece is assembled on the pushing card and is carried by the pushing card, so that the movement stroke of the armature component along the Y-axis direction can be better converted into the movement stroke of the movable contact piece, and the loss of driving force and the movement stroke is avoided. It should be noted that, in comparison with the prior art pendulum-type magnetic latching relay, the armature assembly is fixedly coupled to the pusher card due to the use of the aforementioned magnetic circuit portion. Meanwhile, compared with the direct-acting magnetic latching relay in the prior art, due to the adoption of the magnetic circuit part defined by the patent, the armature assembly has larger size in the X-axis direction perpendicular to the movement direction of the armature assembly, and the linear movement is realized by the pushing rod with smaller diameter, and the pushing card in the patent is used for installing and bearing each movable contact element group. Therefore, when the movable contact group is restricted to be arranged along the X-axis direction in the twenty-second technical solution, the problem of seizing or the reduction of life due to severe abrasion can be avoided.
In the twenty-fifth technical scheme, the push card and the armature component insert are molded integrally, errors possibly generated in the assembly process of the armature component and the push card are avoided, the integration level of the push card and the armature component is higher, parts are fewer, and limited space is fully utilized.
In the twenty-sixth technical scheme, the connecting portion for mounting and carrying each movable contact group extends along the X direction perpendicular to the movement direction of the push card, which is beneficial to arranging the movable contact groups along the X axis direction.
In the twenty-seventh technical scheme, the first guide part and the second guide part are in sliding fit along the Y-axis direction, so that the linear motion of the pushing card can be guided, jamming and skew during the motion of the pushing card are avoided, and each movable contact piece can be effectively ensured to be reliably abutted against the static contact piece.
In the twenty eighth technical scheme, the second guiding part is positioned at the middle part of the pushing card along the X-axis direction, namely is closer to the position of the mass center of the whole moving part, which is more beneficial to guiding the movement of the pushing card and avoiding the jamming and skew during the movement of the pushing card.
In the twenty-ninth technical scheme, the guide piece extends along the Y-axis direction, one of the accommodating piece and the pushing card is fixedly connected with the guide piece, and the other of the accommodating piece and the pushing card is in sliding fit with the guide piece, so that the guide piece can play a role in guiding the linear motion of the pushing card.
In the thirty-first technical solution, the two guiding members are disposed on two sides of the push card along the X-axis direction, and the two guiding members can effectively guide the push card no matter to which side the motion direction of the push card may be inclined, thereby better preventing the moving member from being jammed or inclined.
In the thirty-first technical scheme, the sliding fit or fixed connection position of the guide piece and the pushing card is located between the two matching parts of the corresponding matching part group along the Y-axis direction, so that the guide piece can be kept to extend along the Y-axis direction during assembly, and cannot incline or shake along the X-axis. Further, when the gravitational direction is the Z-axis direction, it is also possible to carry the guide, and to carry the moving parts formed by the armature assembly, the push card, the respective movable contact groups, and the like, through the guide. Particularly, when the number of the movable contact element groups is three and the movable contact element groups are distributed along the X-axis direction, the weight of the moving part is large, so that two matching parts in the matching part groups bear the moving part in the gravity direction of the moving part, and the moving part cannot be inclined in the gravity direction.
In the thirty-second technical scheme, the elastic support group stores energy when the movable contact group abuts against the static contact group and releases energy when the movable contact group is far away from the static contact group, so that extra repulsive force can be effectively generated between the movable contact group and the static contact group when an external circuit is controlled to be turned off, and the movable contact group is further far away from the static contact group. Especially, under the condition that an anti-short-circuit unit for resisting fault and large current is further arranged between the movable contact element group and the static contact element group, when the movable contact element group abuts against the static contact element group, current flowing through the movable contact element enables a magnetic loop to be formed on the anti-short-circuit unit, so that suction force is generated in the movable contact element group and the static contact element group, at the moment, repulsive force formed by elastic force of the elastic support group can offset or partially offset corresponding suction force when load current is normal, and therefore the movable contact element group is helped to be far away from the static contact element group.
In a thirty-third technical solution, the elastic support group includes elastic supports, the number of the elastic supporting portions is the same as and corresponds to the number of the movable contacts in the movable contact group, and each movable contact is mounted on the corresponding elastic supporting portion, so that each movable contact can adjust the posture by the relatively independent elastic supporting portion, which is more beneficial for the first movable contact and the second movable contact on the movable contact to reliably abut against the corresponding static contact group.
In a thirty-fourth aspect, the elastic supporting portion includes two elastic arms fixedly connected to the overcurrent bridge, so that the movable contact member can swing freely to adjust the posture.
In the thirty-fifth technical scheme, the fixed connection positions of the two elastic arms and the overcurrent bridge are respectively positioned on the back surfaces of the first movable contact and the second movable contact, so that the elastic force of the two elastic arms can directly act on the two movable contacts, and the two movable contacts can be more ensured to reliably abut against corresponding static contact pieces.
In the thirty-sixth technical scheme, the limiting piece pushes the card relatively to fix and pushes each movable contact piece along the Y-axis direction to limit the distance between each movable contact piece and the static contact piece when the corresponding movable contact piece group is far away from the static contact piece group, so that the limiting piece can ensure the safe distance between each movable contact piece and the static contact piece group, and the problem that the distance between partial movable contact piece and the static contact piece group is too short due to inconsistent elasticity of the elastic support group can be avoided.
In the thirty-seventh technical scheme, the limiting part of the pushing clamp is only in sliding fit with the adapting part of the support body, and the elastic support moves along the Y axis to be limited by the limiting part, so that the elastic support is simpler to install.
In the thirty-eighth technical scheme, the elastic piece stores energy due to deformation when the movable contact piece group moves in the direction away from the static contact piece group and releases energy due to recovery deformation when the movable contact piece group moves in the direction close to the static contact piece group, so that the movable contact piece can better help the movement of the movable contact piece from the first position to the second position. The moving stroke of the movable contact is favorably increased, so that the safety distance between the movable contact and the static contact is also favorably increased.
In the thirty-ninth technical solution, by providing the short circuit resisting unit, the first magnetizer group and the second magnetizer group can form a magnetic loop when the movable contact group has current passing through, thereby forming an attraction force between the first magnetizer group and the second magnetizer group. The larger the current is, the larger the attraction force is, so that the moving contact element group can be prevented from being separated from the static contact element group when the large current impacts the contact part in fault, and destructive arc pulling can be prevented.
In the forty-first technical scheme, the first magnetizer group is at least partially positioned on the back of the overcurrent bridge, and the second magnetizer group is at least partially positioned between the overcurrent bridge and the reverse overcurrent part, so that a magnetic loop can be formed between the first magnetizer group and the second magnetizer group by current of the movable contact, and the direction of the current of the reverse overcurrent part is opposite to that of the movable contact, so that the magnetic induction line direction of a magnetic field generated by the reverse overcurrent part on the side where the second magnetizer group is positioned is the same as the magnetic induction line direction of a magnetic field generated by the overcurrent bridge on the side where the second magnetizer group is positioned, the magnetic field intensity of the second magnetizer group is enhanced, and the magnetic attraction between the second magnetizer group and the first magnetizer group is stronger, so that the movable contact group and the static contact group are not easy to separate under the condition of large fault current.
In the forty-first technical scheme, the second magnetizer group is covered by the insulator, so that the creepage distance between two static contacts positioned on two sides of the same second magnetizer group is increased, and the two static contacts cannot be easily short-circuited due to the arrangement of the second magnetizer group.
In forty-second technical scheme, the insulator forms in the holding spare, compares in establishing the insulator in addition, and occupation space is less, and the integrated level of relay is higher.
In the forty-third technical scheme, a separation part is arranged between adjacent contact cavities, so that short circuit between three-phase alternating current and two phases caused by short circuit between adjacent static contact sets can be prevented, and when arc discharge conditions occur to part of contact sets, electric arcs are conducted to other contact sets to cause short circuit between two phases.
In the forty-fourth technical scheme, when the movable contact piece group abuts against the static contact piece group, the blocking part blocks the adjacent contact cavities. Therefore, the blocking effect of the blocking part is better.
In the forty-fifth technical scheme, each contact cavity is provided with a baffle part along two sides of the X-axis direction, so that when an arc-drawing condition occurs between a movable contact group and a corresponding static contact group at the most edge along the X-axis direction, an electric arc cannot be conducted to the side wall of the accommodating part, and the insulating property of the accommodating part is ensured.
In the forty-sixth technical scheme, the baffle part is formed on the accommodating part or the pushing card and is a part of the accommodating part or the pushing card, and the baffle part can be integrally injection molded when the accommodating part or the pushing card is manufactured, so that the integration level is high, and the manufacturing is simpler.
In the forty-seventh technical scheme, the baffle part is made of high-temperature-resistant insulating materials, so that when the load is large and the electric arc is pulled to generate large heat, the heat of the electric arc is prevented from damaging the baffle part, the baffle part is prevented from being damaged, and the load capacity of the relay is improved.
The forty-eighth technical means is a preferable embodiment of the forty-seventh technical means, which has a characteristic of low cost.
The forty-ninth technical means has the technical effects corresponding to the seventeenth to forty-eighth technical means cited therein.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments, the following brief description of the drawings is provided, in which:
FIG. 1 is an exploded perspective view of a relay according to an embodiment;
FIG. 2 is an exploded perspective view of the housing of the first embodiment;
Fig. 3 is a perspective view of a bottom shell in the first embodiment;
FIG. 4 is a top view of a magnetic circuit portion in the first embodiment;
FIG. 5 is an exploded perspective view of a coil assembly according to one embodiment;
fig. 6 is a perspective view of an armature assembly according to the first embodiment;
Fig. 7 is a front view of an armature assembly according to a first embodiment;
fig. 8 is a top view of an armature assembly according to a first embodiment;
fig. 9 is a schematic view of a magnetic circuit portion of the first embodiment of the armature assembly in a magnetically held state in a first position;
FIG. 10 is a schematic diagram of a magnetic circuit portion of the coil assembly immediately after receiving a first pulse electrical signal according to one embodiment;
Fig. 11 is a schematic view of a magnetic circuit portion of the first embodiment in which the armature assembly is driven to move to the second position by the coil assembly;
Fig. 12 is a schematic view of a magnetic circuit portion of the first embodiment with the armature assembly in a magnetically held state in the second position;
FIG. 13 is a schematic diagram of a magnetic circuit portion of the coil assembly immediately after receiving a second pulse electrical signal according to one embodiment;
Fig. 14 is a schematic view of a portion of a magnetic circuit of an embodiment in which an armature assembly is driven to move to a first position by a coil assembly;
FIG. 15 is an exploded perspective view of the moving part of the first embodiment;
FIG. 16 is a top view of the pushing unit in the first embodiment;
fig. 17 is a left side view of the pushing unit in the first embodiment;
fig. 18 is a perspective view of the pushing unit in the first embodiment;
fig. 19 is a perspective view of a movable contact unit in the first embodiment;
FIG. 20 is a perspective view of a stopper according to the first embodiment;
FIG. 21 is a top view of a moving part of the first embodiment;
FIG. 22 is a perspective view of a stationary contact set according to the first embodiment;
Fig. 23 is a schematic structural view of a contact portion in the first embodiment;
Fig. 24 is a schematic view of a contact portion of a relay in a conductive state according to an embodiment;
fig. 25 is a schematic diagram of a relay in an on state according to an embodiment;
FIG. 26 is a cross-sectional view taken along line A-A of FIG. 25;
FIG. 27 is an enlarged view of part B of FIG. 26;
fig. 28 is a schematic diagram of a relay in an off state according to an embodiment;
FIG. 29 is an enlarged partial view of portion C of FIG. 28;
FIG. 30 is a perspective view of an elastic member and a guide member according to the first embodiment;
FIG. 31 is a D-D sectional view of FIG. 25;
FIG. 32 is a front view of a micro switch in accordance with the first embodiment;
FIG. 33 is a perspective view of a relay and transformer according to an embodiment;
fig. 34 is a perspective view of an armature assembly in the second embodiment;
fig. 35 is a top view of an armature assembly according to the second embodiment;
fig. 36 is an exploded perspective view of the armature of the second embodiment;
fig. 37 is a schematic view of a magnetic circuit portion of the armature assembly of the second embodiment in a magnetically held state in the first position;
FIG. 38 is a schematic diagram of a magnetic circuit portion of the coil assembly of the second embodiment upon receipt of a first pulsed electrical signal;
Fig. 39 is a schematic diagram of a magnetic circuit portion of the second embodiment in which the armature assembly is driven to move to the second position by the coil assembly;
Fig. 40 is a schematic view of a magnetic circuit portion of the armature assembly of the second embodiment in a magnetically held state in the second position;
FIG. 41 is a schematic diagram of a magnetic circuit portion of the coil assembly of the second embodiment upon receipt of a second pulsed electrical signal;
fig. 42 is a schematic view of a magnetic circuit portion of the second embodiment in which the armature assembly is driven to move to the first position by the coil assembly;
fig. 43 is a schematic diagram of the third embodiment when the relay is in a conductive state;
FIG. 44 is an enlarged partial view of portion E of FIG. 43;
fig. 45 is a schematic diagram of the fourth relay in the off state according to the embodiment;
FIG. 46 is a top view of a fourth relay of the embodiment;
fig. 47 is a cross-sectional view taken in the F-F direction of fig. 46.
The main reference numerals illustrate:
1. A relay; 2. a receiving member; 3. a magnetic circuit portion; 4. a pushing portion; 5. a contact portion; 6. a guide member; 7. an elastic member; 8. a micro-switch; 9. a coil assembly; 10. an armature assembly; 11. a contact group; 12. a short circuit resisting unit; 13. a movable contact group; 14. a stationary contact group; 15. a first magnetic conductor set; 16. a second magnetic conductor set; 17. a moving part; 18. a housing; 19. a cover body; 20. a bottom case; 21. a blocking member; 22. a receiving chamber; 23. a protrusion; 24. a coil accommodating chamber; 25. a compartment; 26. a first guide part; 27. a mating section group; 28. a mating portion; 29. a contact cavity; 30. a barrier section; 31. a coil former; 32. a coil winding; 33. an iron core; 34. a yoke; 35. a shield; 36. a signal input terminal; 37. a first yoke; 38. a second yoke; 39. a magnetic drive end; 40. a first magnetic drive end; 41. a second magnetic drive end; 42. a permanent magnet member; 43. an armature; 44. a first permanent magnet member; 45. a second permanent magnet; 46. a first magnetic pole; 47. a second magnetic pole; 48. a first armature; 49. a second armature; 50. a suction part; 51. a first engaging portion; 52. a second engaging portion; 53. a third engaging portion; 54. a fourth engaging portion; 55. portions crossing each other; 56. a narrower section; 57. a wider section; 58. pushing the card; 59. a connecting piece; 60. an elastic support group; 61. a limiting piece; 62. a pushing unit; 63. a movable contact unit; 64. an accommodating portion; 65. a connection part; 66. a pushing part; 67. a second guide part; 68. a mounting hole; 69. a limit part group; 70. a limit part; 71. a clamping part; 72. a movable contact; 73. an overcurrent bridge; 74. a movable contact; 75. a first movable contact; 76. a second movable contact; 77. a first magnetizer; 78. a body; 79. an extension; 80. an elastic support; 81. a bracket body; 82. an elastic support part; 83. an adapting section; 84. an elastic arm; 85. an abutting portion; 86. an attachment portion; 87. avoidance holes; 88. a clamping hole; 89. a stationary contact; 90. a stationary contact; 91. a load terminal; 92. a first stationary contact; 93. a second stationary contact; 94. a first stationary contact; 95. a first overcurrent section; 96. a second overflow portion; 97. a third overcurrent section; 98. a fourth overcurrent section; 99. a first load terminal; 100. a second stationary contact; 101. a fifth overcurrent section; 102. a sixth overcurrent section; 103. a reverse overcurrent part; 104. a seventh overcurrent section; 105. a second load terminal; 106. a second magnetizer; 107. an insulator; 108. a fixing part; 109. a first bending part; 110. a pushing surface; 111. an avoidance groove; 112. a fixed contact; 113. a moving spring; 114. a signal output terminal; 115. a fixed connection part; 116. a second bending part; 117. a bridge; 118. a transformer; 119. thicker portions; 120. a thinner portion; 121. a substrate; 122. thickening plates; 123. a protruding portion; 124. a step hole; 125. a first mating portion; 126. a second mating portion; 127. dispensing holes; 128. a relief groove; 129. a first slot; 130. a second slot; a1, a first closed magnetic loop; a2, a second closed magnetic loop; b1: a first push magnetic circuit; b2: a second push magnetic circuit; a3, a third closed magnetic loop; a4, a fourth closed magnetic loop; b3, a third pushing magnetic loop; b4, a fourth pushing magnetic loop; a5: a fifth magnetic circuit; b5, a fifth pushing magnetic loop; f1, a first pushing force; f2, a second pushing force; f3, a third driving force; f4, fourth driving force; K. current trend; l, a first magnetic field; m, a second magnetic field; p, a first air gap; q, a second air gap; r, a third air gap; t, a fourth air gap; u, the first projection surface; v, spacing; w, symmetry plane; x, X axes; y, Y axes; z, Z axis direction.
Detailed Description
In the claims and the specification excluding the embodiments, the terms "X-axis direction", "Y-axis direction", and "Z-axis direction" merely mean that features having one of the above directions and features having the other direction are perpendicular to each other, and do not require that they must be implemented as "X-axis direction", "Y-axis direction", and "Z-axis direction" described in the embodiments. In an embodiment, the X-axis direction is perpendicular to the Y-axis direction and also perpendicular to the Z-axis direction. Wherein, the X-axis direction can be divided into left and right, the Y-axis direction can be divided into front and back, and the Z-axis direction can be divided into upper and lower.
In the claims and in the description, unless otherwise defined, the terms "first," "second," or "third," etc., are used for distinguishing between different objects and not for describing a particular sequential order.
In the claims and the specification, unless otherwise defined, the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc., refer to an orientation or positional relationship based on that shown in the drawings, and are merely for convenience of description, and do not imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation.
In the claims and specification, unless otherwise defined, the terms "fixedly coupled" and "fixedly connected" are to be construed broadly as any manner of connection without a displacement relationship or relative rotational relationship therebetween, and that is to say include non-detachably fixedly connected, integrally connected, and fixedly connected by other means or elements.
In the claims and specification, unless otherwise defined, the terms "comprising," having, "and variations thereof mean" including but not limited to.
In the claims and the description, unless otherwise defined, the term "provided" means that the technical feature located thereafter is a part of the technical feature located before it.
In the claims and the description, unless otherwise defined, the term "temporary formation" means that the polarity of the magnetic drive end formed by the pulsed electrical signal disappears with the disappearance of the pulsed electrical signal.
In the claims and the description, unless otherwise defined, the term "reverse" means that when the current direction of the pulse electric signal received by the coil assembly this time is different from the current direction of the pulse electric signal received last time, the polarity of the magnetic driving end formed temporarily this time is opposite to the polarity of the magnetic driving end formed temporarily last time. Of course, it should be understood by those skilled in the art that, for the magnetic latching relay, if the current direction of the pulse electric signal received by the coil assembly this time is the same as the current direction of the pulse electric signal received last time, the pulse electric signal received this time is of no control significance, and the state of the relay will not change.
In the claims and specification, unless otherwise defined, the term "magnetically permeable cross section" refers to a cross section of the armature perpendicular to its magnetically permeable path in a magnetic field.
In the claims and the description, unless otherwise defined, the term "rear face" means that the face is oriented away from the stationary contact set.
In the claims and specification, unless otherwise defined, the term "mounted" means directly or indirectly connected to one another.
In the claims and specification, unless otherwise defined, the term "carrying" means that the force of gravity of an object will act on another object.
In the claims and specification, unless otherwise defined, the term "directly connected to" means that there are no other parts between them, directly connected.
The technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings.
Example 1
The relay 1 is used for receiving an electric signal to control the on-off of an external circuit. Specifically, the relay 1 in the present embodiment is a magnetic latching relay that controls on-off of an external circuit by receiving a pulse electric signal. In this embodiment, the pulse electric signal may be divided into a first pulse electric signal and a second pulse electric signal. The first pulse electric signal is correspondingly used for controlling the external circuit to be turned on, and the second pulse electric signal is correspondingly used for controlling the external circuit to be turned off. The relay 1 is switched from an off state to an on state after receiving the first pulse electric signal, and the relay 1 is kept in the on state until receiving the second pulse electric signal after the first pulse electric signal disappears; the relay 1 is switched from the on state to the off state after receiving the second pulse electric signal, and after the second pulse electric signal disappears, the relay 1 is kept in the off state until receiving the first pulse electric signal. In this embodiment, the external circuit is a three-phase alternating current. The relay 1 needs to control the on-off of three phases simultaneously.
Referring to fig. 1, fig. 1 shows the structure of a relay 1 of the present embodiment. As shown in fig. 1, the relay 1 includes a housing 2, a magnetic circuit portion 3, a pushing portion 4, a contact portion 5, a guide 6, an elastic member 7, and a micro switch 8.
Wherein the magnetic circuit part 3 comprises a coil assembly 9 and an armature assembly 10. The contact portion 5 includes a contact group 11 and a short-circuit resisting unit 12, the number of the contact group 11 is at least one, and the short-circuit resisting unit 12 is the same as and corresponds to the number of the contact group 11. Each contact set 11 comprises a movable contact set 13 and a stationary contact set 14. Each anti-short circuit unit 12 comprises a first set of magnetic conductors 15 and a second set of magnetic conductors 16. Since the present embodiment needs to control three phases to be simultaneously turned on and off, the number of the contact groups 11 is three in the present embodiment. In this embodiment, the armature assembly 10, the pushing portion 4, the movable contact group 13, and the first magnetizer group 15 constitute a moving member 17, and the moving member 17 is a main member that moves relative to the housing 2.
For convenience of description, the description of this embodiment is that of the accommodating member 2, the magnetic circuit portion 3, the moving member 17, the stationary contact group 14, the second magnetizer group 16, the contact portion 5, the guide member 6, the elastic member 7, and the micro switch 8, and finally, the operational principle of the relay 1 is reviewed.
The accommodating member 2 is for accommodating the magnetic circuit member 3, the pushing portion 4, the contact portion 5, the guide member 6, the elastic member 7, and the micro switch 8. The receiving part 2 should also be regarded as a reference to the movement of the moving part 17, i.e. in this embodiment the movements in question are relative to the receiving part 2. As in the prior art, the receiving member 2 is made of an insulating material, in this embodiment, it is injection molded from plastic.
As shown in fig. 1, the container 2 includes a housing 18 and a cover 19. In the present embodiment, the housing 18 is for accommodating and mounting the magnetic circuit member 3, the pushing portion 4, the contact portion 5, the guide 6, the elastic member 7, and the micro switch 8. "mounted" in this embodiment means directly or indirectly connected to each other.
Referring to fig. 2 and 3, fig. 2 and 3 show the housing 18 in this embodiment. As shown in fig. 2, the housing 18 includes a bottom shell 20 and a closure member 21. The front part of the bottom shell 20 along the Y-axis direction is provided with three accommodating cavities 22, the three accommodating cavities 22 are distributed along the X-axis direction, the accommodating cavities 22 are used for accommodating the second magnetizer group 16, the accommodating cavities 22 are provided with openings along the Z-axis direction, and the openings are positioned on the bottom surface of the bottom shell 20, which is far away from the cover 19. In the present embodiment, two signal input terminals 36 and two signal output terminals 114 extend from the bottom surface of the bottom case 19 in the Z-axis direction, respectively, the two signal input terminals 36 are for receiving pulse electric signals, and the two signal output terminals 114 are for transmitting relay state signals to the relay state sensing circuit.
As shown in fig. 2, in the present embodiment, the number of the plugging members 21 is the same as and corresponds to the number of the accommodating chambers 22, and the plugging members 21 are fixedly connected to the bottom shell 20 and are used for shielding the openings of the corresponding accommodating chambers 22, so that the second magnetizer set 16 is fixed in the accommodating chambers 22.
As shown in fig. 3, in the present embodiment, the upper surface of the bottom case 20 is closed at positions corresponding to the three accommodating chambers 22 along the Z-axis direction, and three sets of protrusions 23 are provided, the three sets of protrusions 23 are located at the front part of the upper surface of the bottom case 20 along the Y-axis direction, each set of protrusions 23 includes two protrusions 23 arranged along the X-axis direction, and the extending direction of each protrusion 23 intersects the X-axis, and extends along the Y-axis direction in the present embodiment. The function of the projection 23 will be described together with the description of the contact portion 5.
As shown in fig. 3, in this embodiment, a coil accommodating cavity 24 is disposed at a rear portion of the bottom shell 20 along the Y-axis direction, the coil accommodating cavity 24 is located in a middle portion of the bottom shell 20 along the X-axis direction, the coil accommodating cavity 24 is opened upward along the Z-axis direction and is used for accommodating the coil assembly 9, two sides of the coil accommodating cavity 24 along the X-axis direction are respectively provided with a plurality of separation cavities 25, and a portion of the separation cavities 25 are provided with heat dissipation holes at a bottom surface of the bottom shell 20, wherein the heat dissipation holes are used for conducting heat generated by electrical conduction in the accommodating part 2 to an external environment. In this embodiment, most of the cells 25 do not contain other components, and therefore, the coil accommodating chamber 24 can be increased in size in the X-axis direction as needed.
As shown in fig. 3, in this embodiment, the upper surface of the middle portion of the bottom case 20 along the X-axis direction and the Y-axis direction is provided with a first guide portion 26, and in this embodiment, the first guide portion 26 is a guide groove extending along the Y-axis direction, and in other embodiments, the first guide portion 26 may be a bump.
As shown in fig. 3, in this embodiment, the left and right sides of the bottom case 20 along the X-axis direction are respectively provided with a mating portion group 27, each mating portion group 27 includes at least two mating portions 28, and in this embodiment, each mating portion group 27 includes two mating portions 28. Each mating portion 28 in the same mating portion group 27 is laid out in the Y-axis direction. In this embodiment, each of the engaging portions 28 is provided with an engaging groove penetrating in the Y-axis direction for engaging with the guide 6. The groove wall of the mating groove may be attached with an arc ring made of metal to reduce the chips generated by friction between the guide member 6 and the mating portion 28, or the contact surface of the mating groove and the guide member 6 may be reduced by chamfering or rounding.
As shown in fig. 3, in the present embodiment, the bottom shell 20 is provided with contact cavities 29, and the number of the contact cavities 29 is the same as and corresponds to the number of the contact element groups 11, and in the present embodiment, the number of the contact cavities 29 is three. Three contact chambers 29 are located between the first guide portion 26 and each of the projections 23 in the Y-axis direction, and the three contact chambers 29 are arranged in the X-axis direction. The contact cavity 29 is used for accommodating the contact set 11 and for the movable contact set 13 to abut against or separate from the stationary contact set 14 along the Y-axis direction. A barrier portion 30 is provided between two adjacent contact cavities 29, and in this embodiment, the number of barrier portions 30 is two. The barrier 30 extends generally in the Y-axis direction and is sized in the Z-axis direction to separate adjacent contact cavities 29. When the movable contact set 13 abuts against the stationary contact set 14, the blocking portion 30 separates or even blocks the adjacent contact cavities 29. The barrier 30 is used for preventing short circuit between adjacent static contact sets 14 from causing short circuit between three-phase alternating current and two phases, and also is used for preventing arc conduction to other contact sets 11 from causing short circuit between two phases when arc discharge occurs in part of the contact sets 11. In the present embodiment, the blocking portion 30 is formed on the bottom case 20 of the accommodating element 2, and therefore the blocking portion 30 is also made of an insulating material. In other embodiments, the barrier 30 may be formed on the pusher card 58 or affixed to the receptacle 2 or the pusher card 58 as a separate component.
As shown in fig. 1, in the present embodiment, the bottom case 20 has an opening upward in the Z-axis direction. The cover 19 is used for shielding the opening of the bottom shell 20 and is fixedly connected with the bottom shell 20. In this embodiment, the cover 19 is clamped with the bottom shell 20, and a plurality of plug-in posts are further disposed on the cover 19 and are used for being plugged with the bottom shell 20 to position the cover 19.
The magnetic circuit portion 3 is for receiving a pulse electric signal, which drives the pushing portion 4 to linearly move in the Y-axis direction in accordance with the pulse electric signal to change the state of the contact portion 5. In this embodiment, the magnetic circuit portion 3 is also configured to hold the pushing portion 4 and the contact portion 5 in the current state after the pulse electric signal is extinguished until a new pulse electric signal is received.
Referring to fig. 4, fig. 4 shows a magnetic circuit portion 3 in the present embodiment. As shown in fig. 4, the magnetic circuit portion 3 in the present embodiment includes a coil assembly 9 and an armature assembly 10.
Referring to fig. 5, fig. 5 shows a coil assembly 9 in the present embodiment. As shown in fig. 5, the coil assembly 9 includes a bobbin 31, a coil winding 32, an iron core 33, a yoke 34, and a shield 35.
As shown in fig. 5, the coil form 31 is fixedly connected with the bottom case 20 and is located in the coil accommodating chamber 24. The bobbin 31 extends in the X-axis direction and is provided with a center hole extending in the X-axis direction. The coil form 31 is provided with retaining walls at both ends in the X-axis direction, respectively.
As shown in fig. 5, the coil winding 32 is wound on the bobbin 31 and is located between the two retaining walls. Thus, the axis of the coil winding 32 also extends in the X-axis direction. Two terminals of the coil winding 32 are connected to two signal input terminals 36, and the two signal input terminals 36 are fixedly connected to a retaining wall of the coil frame 31, penetrate the bottom case 20 in the Z-axis direction, and protrude from the bottom surface of the bottom case 20 (see fig. 2).
As shown in fig. 5, the iron core 33 is disposed in the center hole of the bobbin 31 and extends in the X-axis direction.
As shown in fig. 5, in the present embodiment, the number of yokes 34 is two and both are made of a magnetically conductive material. The two yokes 34 are a first yoke 37 and a second yoke 38, respectively. Two yokes 34 are fixedly connected with two ends of the iron core 33 respectively, and one ends of the two yokes 34, which are far away from the iron core 33, form magnetic driving ends 39 respectively. The two magnetic drive ends 39 are a first magnetic drive end 40 and a second magnetic drive end 41, respectively. Wherein the first magnetic drive end 40 is formed at the first yoke 37 and the second magnetic drive end 41 is formed at the second yoke 38. In this embodiment, both yokes 34 are L-shaped, with the ends of their longer arms fixedly connected to the ends of the core 33 and their shorter arms extending toward each other to form the magnetic drive end 39. The two magnetic drive ends 39 are disposed along the X-axis direction and extend along the X-axis direction to limit movement of the armature assembly 10 along the Y-axis direction. Specifically, in the present embodiment, the two magnetic drive ends 39 are used to limit not only the forward movement of the armature assembly 10 in the Y-axis direction from the first position to the second position, but also the rearward movement of the armature assembly 10 in the Y-axis direction from the second position to the first position.
As shown in fig. 5, the shield 35 is fixed to the bobbin 31 and made of a metal material. In this embodiment, the shielding member 35 covers the other portions of the coil block 9 above the Z axis and on the left and right sides of the X axis. The shield 35 is used to make other parts of the coil assembly 9 less prone to interference from external magnetic fields, and also to make magnetic fields of other parts of the coil assembly 9 less prone to interference from the outside.
In this embodiment, the coil assembly 9 is excited by the pulsed electrical signal to reverse the polarity of the temporary formation of the two magnetic drive ends 39. The "temporary formation" in the present embodiment means that the polarity of the magnetic driving end 39 formed of the pulse electric signal disappears as the pulse electric signal disappears. The "inversion" in this embodiment means that when the current direction of the pulse electric signal received by the coil assembly 9 is different from that of the pulse electric signal received last time, the polarity of the magnetic driving end 39 formed this time is opposite to that of the magnetic driving end 39 formed last time. In this embodiment, as already described above, the pulse electric signal can be divided into a first pulse electric signal and a second pulse electric signal. The first pulse electric signal is correspondingly used for controlling the external circuit to be turned on, and the second pulse electric signal is correspondingly used for controlling the external circuit to be turned off. In this embodiment, the first pulse electric signal and the second pulse electric signal are electric pulses with opposite current directions. In the present embodiment, for convenience of description, the coil winding 32 is set to be excited by the first pulse electric signal to form the first magnetic field, and the first magnetic driving end 40 is temporarily provided with the N-pole polarity, and the second magnetic driving end 41 is temporarily provided with the S-pole polarity. After the first pulsed electrical signal is extinguished, the first magnetic drive end 40 and the second magnetic drive end 41 do not have the polarity generated by the first magnetic field. Conversely, the coil winding 32 is energized by a second pulsed electrical signal to form a second magnetic field and temporarily provide the first magnetic drive end 40 with an S-pole polarity and the second magnetic drive end with an N-pole polarity. After the second pulsed electrical signal is extinguished, the first magnetic drive end 40 and the second magnetic drive end 41 do not have the polarity generated by the second magnetic field.
In this embodiment, the coil assembly 9 comprises only one coil winding 32, and the coil winding 32 has only two signal input terminals 36. In other embodiments, the coil assembly 9 may include two coil windings 32, and the two coil windings 32 may be provided with three or four signal input terminals 36. Each signal input terminal 36 outputs a corresponding first pulse electric signal and second pulse electric signal to the two coil windings 32. At this time, the coil assembly 9 as a whole is still excited by the pulsed electric signal to reverse the polarity temporarily developed by the two magnetic drive ends 39.
The armature assembly 10 is driven by the coil assembly 9 to move in the Y-axis direction, which movement can be divided into movement from the rear first position to the front second position and movement from the front second position to the rear first position. When the armature assembly 10 moves to the first position, the relay 1 is in an off state, and the electrical connection between the power source and the load in the external three-phase alternating current is turned off. When the armature assembly 10 moves to the second position, the relay 1 is in a conductive state, and the electrical connection between the power source and the load in the external three-phase alternating current is conductive.
Referring to fig. 6-8, fig. 6-8 illustrate the armature assembly 10 of the present embodiment. As shown in fig. 6, in the present embodiment, the armature assembly 10 includes two permanent magnet pieces 42 and two armatures 43.
In the present embodiment, as shown in fig. 6, the two permanent magnetic pieces 42 are formed by magnetized magnetic steel, and in other embodiments, other permanent magnetic materials, such as neodymium iron boron permanent magnets, may be used for the two permanent magnetic pieces 42. In this embodiment, the two permanent magnet pieces 42 are a first permanent magnet piece 44 and a second permanent magnet piece 45, respectively. In this embodiment, the two permanent magnet pieces 42 each have two magnetic poles with fixed polarities, the two magnetic poles are a first magnetic pole 46 and a second magnetic pole 47, and the polarities of the first magnetic pole 46 and the second magnetic pole 47 are opposite. The first poles 46 of the two permanent magnet pieces 42 are of the same polarity and the second poles 47 of the two permanent magnet pieces 42 are of the same polarity. In this embodiment, for convenience of description, the first magnetic pole is set to be an N pole, and the second magnetic pole is set to be an S pole. In this embodiment, two permanent magnets 42 are disposed along the X-axis direction. The two poles of each permanent magnet member 42 are arranged in the Y-axis direction. Wherein the first magnetic pole 46 of the first permanent magnet piece 44 is forward in the Y-axis direction, the second magnetic pole 47 is backward in the Y-axis direction, the first magnetic pole 46 of the second permanent magnet piece 45 is backward in the Y-axis direction, and the second magnetic pole 47 is forward in the Y-axis direction.
As shown in fig. 6, the two armatures 43 are a first armature 48 and a second armature 49, respectively. The first armature 48 is fixedly connected with the first magnetic pole 46 of the two permanent magnet pieces 42, and the second armature 49 is fixedly connected with the second magnetic pole 47 of the two permanent magnet pieces 42. The projections of the two armatures 43 on a first projection plane U perpendicular to the Z-axis direction intersect each other. Two engaging portions 50 are respectively provided at both ends of each armature 43 in the X-axis direction, wherein a first engaging portion 51 and a second engaging portion 52 are respectively provided at both ends of the first armature 48 in the X-axis direction, the first engaging portion 51 being on the left side in the X-axis direction and on the front side in the Y-axis direction, and the second engaging portion 52 being on the right side in the X-axis direction and on the rear side in the Y-axis direction; the second armature 49 is provided with a third engaging portion 53 and a fourth engaging portion 54 at both ends in the X-axis direction, respectively, the third engaging portion 53 being on the right side in the X-axis direction and on the front side in the Y-axis direction, and the fourth engaging portion 54 being on the left side in the X-axis direction and on the rear side in the Y-axis direction. Accordingly, the first and third engaging portions 51 and 53 are arranged in the X-axis direction, and the fourth and second engaging portions 54 and 52 are arranged in the X-axis direction; the first and fourth engaging portions 51 and 54 are disposed along the Y-axis direction, and the third and second engaging portions 53 and 52 are disposed along the Y-axis direction.
As shown in fig. 6 and 7, each armature is provided with a narrower section 56 and a wider section 57. The width of the narrower section 56 in the Z-axis direction is smaller than the width of the wider section 57 in the Z-axis direction. In this embodiment, the number of the wider sections 57 is two, and the two wider sections 57 are respectively located at two sides of the narrower section 56 along the X-axis direction. The portion 55 of each armature 43 that intersects each other is located in a narrower section such that a space V is formed between the portions 55 of the two armatures 43 that intersect each other. In each armature 43, the positions where the two permanent magnet pieces 42 are fixedly connected are respectively located on both sides of the portion 55 crossing each other in the X-axis direction and are located on the wider section 57.
As shown in fig. 8, in the present embodiment, the armature assembly 10 extends in the X-axis direction as a whole, and has a dimension in the X-axis direction larger than that in the Y-axis direction. The projection of the armature assembly 10 onto the first projection plane U is mirror symmetrical with respect to a plane of symmetry W perpendicular to the X-axis direction.
Referring to fig. 9 to 15, fig. 9 to 15 show the operation principle of the magnetic circuit portion 3 in the present embodiment.
As shown in fig. 9, in the present embodiment, the armature assembly 10 is located between two long arms of the yoke 34 connected to the core 33 in the X-axis direction. The first magnetic drive end 40 is located between the first engaging portion 51 and the fourth engaging portion 54 in the Y-axis direction; the second magnetic drive end 41 is located between the third engaging portion 53 and the second engaging portion 52 in the Y-axis direction.
Fig. 9 shows the state of the magnetic circuit portion 3 when the armature assembly 10 in the present embodiment is in the magnetic retaining state in the first position. As shown in fig. 9, when the armature assembly 10 is in the magnetic retaining state in the first position, the first engaging portion 51 engages the first magnetic drive end 40, and the third engaging portion 53 engages the second magnetic drive end 41. At this time, the magnetic circuit portion 3 forms two closed magnetic circuits, i.e., a first closed magnetic circuit A1 and a second closed magnetic circuit A2. The first closed magnetic circuit A1 returns from the first magnetic pole 46 of the first permanent magnet piece 44 to the first magnetic pole 46 of the first permanent magnet piece 44 via the first engaging portion 51, the first magnetic driving end 40, the first yoke 37, the iron core 33, the second yoke 38, the second magnetic driving end 41, the third engaging portion 53, the portion 55 where the second armature 49 crosses each other, the second magnetic pole 47 of the first permanent magnet piece 44, without any air gap therebetween, and through the entire coil assembly 9. The second closed magnetic circuit A2 returns from the first magnetic pole 46 of the second permanent magnet piece 45, through the portion 55 where the first armature 48 crosses each other, the first engaging portion 51, the first magnetic driving end 40, the first yoke 37, the iron core 33, the second yoke 38, the second magnetic driving end 41, the third engaging portion 53, the second magnetic pole 47 of the second permanent magnet piece 45, back to the first magnetic pole 46 of the second permanent magnet piece 45 without any air gap therebetween, and through the entire coil assembly 9. Therefore, when the armature assembly 10 is in the magnetic retaining state in the first position, the armature assembly 10 is kept in the first position relative to the coil assembly 9 due to the first and second closed magnetic circuits A1 and A2 having a superposition effect therebetween, so that a larger magnetic attraction force is generated between the first attraction portion 51 and the first magnetic driving end 40 and between the third attraction portion 53 and the second magnetic driving end 41.
Fig. 10 shows the state of the magnetic circuit portion 3 immediately after the coil assembly 9 in the present embodiment receives the first pulse electric signal. At this time, the coil winding 32 is excited by the first pulse electric signal to generate the first magnetic field, so that the first magnetic driving end 40 temporarily has the N-pole polarity, and the second magnetic driving end 41 temporarily has the S-pole polarity. Since the first magnetic driving end 40 and the first engaging portion 51 have the same polarity as each other and are both N-poles, the first magnetic driving end 40 generates a magnetic repulsive force to the first engaging portion 51; since the second magnetic driving end 41 and the third engaging portion 53 are both S-poles in polarity, the second magnetic driving end 41 generates a magnetic repulsive force to the third engaging portion 53. Furthermore, the magnetic circuit portion 3 now forms two pushing magnetic circuits, namely a first pushing magnetic circuit B1 and a second pushing magnetic circuit B2. The first pushing magnetic circuit B1 returns from the first magnetic driving end 40 to the first magnetic driving end 40 via the first air gap P, the fourth engaging portion 54, the second magnetic pole 47 of the first permanent magnet member 44, the first magnetic pole 46 of the first permanent magnet member 44, the portion 55 where the first armature 48 crosses each other, the second engaging portion 52, the first air gap P, the second magnetic driving end 41, the second yoke 38, the iron core 33, the first yoke 37, and only two first air gaps P that must exist as travel gaps in the middle, and passes through the entire coil assembly 9. The second pushing magnetic circuit B2 returns from the first magnetic driving end 40 to the first magnetic driving end 40 via the first air gap P, the fourth engaging portion 54, the portion 55 where the second armature 49 crosses each other, the second magnetic pole 47 of the second permanent magnet member 45, the first magnetic pole 46 of the second permanent magnet member 45, the second engaging portion 52, the first air gap P, the second magnetic driving end 41, the second yoke 38, the iron core 33, the first yoke 37, and only two first air gaps P that are necessary as travel gaps in the middle, and passes through the entire coil assembly 9. Therefore, when the coil assembly 9 just receives the first pulse electric signal, not only the first magnetic driving end 40 applies a magnetic repulsive force to the first engaging portion 51, the second magnetic driving end 41 applies a magnetic repulsive force to the third engaging portion 53, but also the first magnetic driving end 40 generates a magnetic attraction force to the fourth engaging portion 54 and the second magnetic driving end 41 generates a magnetic attraction force to the second engaging portion 52 due to the first pushing magnetic circuit B1 and the second pushing magnetic circuit B2, which have a superposition effect, so that the coil assembly 9 can generate a stronger first pushing force F1 to the armature assembly 10, and the armature assembly 10 is pushed to move from the first position to the second position along the Y axis direction.
Fig. 11 shows a state of the magnetic circuit portion 3 when the armature assembly 10 is driven to move to the second position by the coil assembly 9 in the present embodiment. In the process of moving the armature assembly 10 from the first position to the second position, the first magnetic driving end 40 limits the movement of the fourth engaging portion 54 from the first position to the second position along the Y-axis direction, so that the fourth engaging portion 54 engages the first magnetic driving end 40; the second magnetic driving end 41 limits the movement of the second engaging portion 52 from the first position to the second position along the Y-axis direction, so that the second engaging portion 52 engages the second magnetic driving end 41. As shown in fig. 11, the first pulsed electrical signal and the first magnetic field have not yet been removed from the armature assembly 10 upon movement to the second position, the first magnetic drive end 40 remains temporarily N-polar and the second magnetic drive end 41 remains temporarily S-polar. At this time, the magnetic circuit portion 3 forms two closed magnetic circuits, namely, a third closed magnetic circuit A3 and a fourth closed magnetic circuit A4. The third closed magnetic circuit A3 returns from the first magnetic driving end 40 to the first magnetic driving end 40 through the fourth engaging portion 54, the second magnetic pole 47 of the first permanent magnet 44, the first magnetic pole 46 of the first permanent magnet 44, the portion 55 where the first armature 48 crosses each other, the second engaging portion 52, the second magnetic driving end 41, the second yoke 38, the iron core 34, and the first yoke 37, without any air gap therebetween, and passes through the entire coil assembly 9. The fourth closed magnetic circuit A4 returns from the first magnetic driving end 40 to the first magnetic driving end 40 via the fourth engaging portion 54, the portion 55 where the second armature 45 crosses each other, the second magnetic pole 47 of the second permanent magnet member 45, the first magnetic pole 46 of the second permanent magnet member 45, the second engaging portion 52, the second magnetic driving end 41, the second yoke 38, the iron core 34, and the first yoke 37, without any air gap therebetween, and passes through the entire coil assembly 9. Therefore, when the armature assembly 10 has just moved to the second position, a greater magnetic attraction force is generated between the first magnetic drive end 40 and the fourth actuation portion 54 and between the second magnetic drive end 41 and the second actuation portion 52 due to the presence of the third closed magnetic circuit A3 and the fourth closed magnetic circuit A4 and the superposition effect therebetween.
Fig. 12 shows the state of the magnetic circuit portion 3 when the armature assembly 10 in the present embodiment is in the magnetic retaining state in the second position. As shown in fig. 12, when the first pulse electric signal is extinguished, the first magnetic field is extinguished, and the first magnetic driving end 40 and the second magnetic driving end 41 no longer have the polarity generated by the first magnetic field. At this time, the third closed magnetic circuit A3 and the fourth closed magnetic circuit A4 still exist, wherein the third closed magnetic circuit A3 may be regarded as starting from the first magnetic pole 46 of the first permanent magnet 44, and the path thereof is the same as the path of the third closed magnetic circuit A3 shown in fig. 11; the fourth closed magnetic circuit A4 can be seen as starting from the first pole 46 of the second permanent magnet piece 45, the path of which is identical to the path of the fourth closed magnetic circuit A4 shown in fig. 11. And the third closed magnetic circuit A3 and the fourth closed magnetic circuit A4 are overlapped with each other, so that a larger magnetic attraction force is generated between the fourth attraction portion 54 and the first magnetic driving end 40 and between the second attraction portion 52 and the second magnetic driving end 41, and the armature assembly 10 is kept at the second position relative to the coil assembly 9.
Fig. 13 shows the state of the magnetic circuit portion 3 immediately after the coil assembly 9 in the present embodiment receives the second pulse electric signal. At this time, as shown in fig. 13, the coil winding 32 is excited by the second pulse electric signal to generate the second magnetic field, so that the first magnetic driving end 40 temporarily has the S-pole polarity, and the second magnetic driving end 41 temporarily has the N-pole polarity. Since the first magnetic driving end 40 and the fourth engaging portion 54 have the same polarity as each other and are S-poles, the first magnetic driving end 40 generates a magnetic repulsive force to the fourth engaging portion 54; since the second magnetic driving end 41 and the second engaging portion 52 are both N-pole in polarity, the second magnetic driving end 41 generates a magnetic repulsive force to the second engaging portion 52. Furthermore, the magnetic circuit portion 3 now forms two pushing magnetic circuits, namely a third pushing magnetic circuit B3 and a fourth pushing magnetic circuit B4. The third pushing magnetic circuit B3 returns from the second magnetic driving end 41 to the second magnetic driving end 41 via the second air gap Q, the third engaging portion 53, the portion 55 where the second armature 45 crosses each other, the second magnetic pole 47 of the first permanent magnet member 44, the first magnetic pole 46 of the first permanent magnet member 44, the first engaging portion 51, the second air gap Q, the first magnetic driving end 40, the first yoke 37, the iron core 33, the second yoke 38, and only two second air gaps Q that must exist as travel gaps in the middle, and passes through the entire coil assembly 9. The fourth driving magnetic circuit B4 returns from the second magnetic driving end 41 to the second magnetic driving end 41 via the second air gap Q, the third engaging portion 53, the second magnetic pole 47 of the second permanent magnet 45, the first magnetic pole 46 of the second permanent magnet 45, the portion 55 where the first armature 48 crosses each other, the first engaging portion 51, the second air gap Q, the first magnetic driving end 40, the first yoke 37, the iron core 33, and the second yoke 38, and only two second air gaps Q necessarily exist as travel gaps in the middle, and passes through the entire coil assembly 9. Therefore, when the coil assembly 9 just receives the second pulse electric signal, not only the first magnetic driving end 40 applies a magnetic repulsive force to the fourth engaging portion 54, but also the second magnetic driving end 41 applies a magnetic repulsive force to the second engaging portion 52, and because of the third pushing magnetic circuit B3 and the fourth pushing magnetic circuit B4 and the superposition effect between them, the first magnetic driving end 40 generates a magnetic attraction force to the first engaging portion 51, and the second magnetic driving end 41 generates a magnetic attraction force to the third engaging portion 53, so that the coil assembly 9 can form a stronger second pushing force F2 to the armature assembly 10, and the armature assembly 10 is pushed to move from the second position to the first position along the Y axis direction.
Fig. 14 shows a state of the magnetic circuit portion 3 when the armature assembly 10 is driven to move to the first position by the coil assembly 9 in the present embodiment. In the process of moving the armature assembly 10 from the second position to the first position, the first magnetic driving end 40 limits the movement of the first engaging portion 51 from the second position to the first position along the Y-axis direction, so that the first engaging portion 51 engages the first magnetic driving end 40; the second magnetic driving end 41 limits the movement of the third engaging portion 53 from the second position to the first position along the Y-axis direction, so that the third engaging portion 53 engages the second magnetic driving end 41. As shown in fig. 14, the second pulsed electrical signal and the second magnetic field have not yet been removed from the armature assembly 10 upon movement to the first position, the first magnetic drive end 40 remains temporarily S-polar, and the second magnetic drive end 41 remains temporarily S-polar. At this time, the magnetic circuit portion 3 still exists in the above-described first closed magnetic circuit A1 and second closed magnetic circuit A2, wherein the first closed magnetic circuit A1 can be regarded as starting from the second magnetic drive end 41, and its path is the same as that of the first closed magnetic circuit A1 shown in fig. 9; the second closed magnetic circuit A2 can be regarded as starting from the second magnetic drive end 41, the path of which is identical to the path of the second closed magnetic circuit A2 shown in fig. 9. Therefore, when the armature assembly 10 has just moved to the first position, a greater magnetic attraction force is generated between the first magnetic driving end 40 and the first engaging portion 51 and between the second magnetic driving end 41 and the third engaging portion 53 due to the presence of the first and second closed magnetic circuits A1 and A2 and the superposition effect therebetween.
When the second pulse electric signal is extinguished, the second magnetic field is extinguished, and the first magnetic drive end 40 and the second magnetic drive end 41 no longer have the polarity generated by the second magnetic field. At this time, the armature assembly 10 is in a magnetically held state in the first position as shown in fig. 9.
The above procedure fully describes the working principle of the magnetic circuit portion 3 in the present embodiment. As is apparent from the above description, the magnetic circuit portion 3 is in the magnetic holding state or the magnetic driving state, the magnetic circuit first portion without an air gap can be formed between the two engaging portions 50 of the armature assembly 10, the magnetic circuit second portion passing through the whole coil assembly 9 can be formed between the two magnetic driving ends 39 of the coil assembly 9, and the first portion and the second portion can form a complete magnetic circuit in both the magnetic holding state and the magnetic driving state, so that the coil assembly 9 in this embodiment drives the armature assembly 10 to linearly move along the Y-axis direction according to the pulse electric signal, and the armature assembly 10 remains in the current state after the pulse electric signal disappears until a new pulse electric signal is received.
The moving part 17 in this embodiment is the main part of the relay 1 that moves relative to the housing 2. Referring to fig. 15, fig. 15 shows a moving member 17 in the present embodiment. As shown in fig. 15, in the present embodiment, the moving member 17 includes the armature assembly 10, the push portion 4, the movable contact group 13, and the first magnetizer group 15. Wherein the pushing portion 4 includes a pushing card 58, a connecting member 59, an elastic bracket set 60, and a stopper 61. Wherein the armature assembly 10, the push card 58 and the connecting piece 59 form a push unit 62, and the movable contact group 13, the first magnetizer group 15 and the elastic support group 60 form a movable contact unit 63. The pushing unit 62 is configured to drive the movable contact unit 63 to move linearly along the Y-axis direction, and the movable contact unit 63 is configured to abut against or separate from the stationary contact group 14. For convenience of description, the moving member 17 in the present embodiment is described in detail below in the order of the pushing unit 62, the movable contact unit 63, and the stopper 61.
Referring to fig. 16 to 18, fig. 16 to 18 show a pushing unit 62 in the present embodiment. As described above, the push unit 62 includes the armature assembly 10, the push card 58, and the connecting piece 59. Wherein the armature assembly 10 has been described in detail previously. The pusher card 58 and connector 59 are described in detail below.
The pusher card 58 is driven by the armature assembly 10 and is used to mount and carry the movable contact unit 62. By "carrying" in this embodiment is meant that the weight of a certain object will act on another object. As shown in fig. 16, the push card 58 is fixedly connected with the armature assembly 10, and in this embodiment, the push card 58 is integrally injection molded with the armature assembly 10 and the connecting piece 59. The pusher card 58 can be divided into a receiving portion 64 for receiving the armature assembly 10 and a connecting portion 65 for receiving the connecting member 59 and mounting and carrying the movable contact unit 62. It should be noted that the separation of the pusher card 58 into the receiving portion 64 and the connecting portion 65 is for convenience of description only, and is integrally formed therebetween.
As shown in fig. 16, when the armature assembly 10 is accommodated in the accommodating portion 64, the armature assembly 10 is wrapped in the accommodating portion 64 except for the four engaging portions 50. Since the dimension of the armature assembly 10 in the X-axis direction is greater than the dimension in the Y-axis direction, the dimension of the receiving portion 64 in the X-axis direction is also greater than the dimension in the Y-axis direction. In the present embodiment, four engaging portions 50 each extend from the housing portion 64 in the X-axis direction and are used to interact with two magnetic drive ends 39. Wherein the first engaging portion 51 and the fourth engaging portion 54 extend from the left side of the accommodating portion 64 in the X-axis direction, the first engaging portion 51 is located at the front in the Y-axis direction, and the fourth engaging portion 54 is located at the rear in the Y-axis direction; the third engaging portion 53 and the second engaging portion 52 protrude from the right side of the housing portion 64 in the X-axis direction, and the third engaging portion 53 is located at the front in the Y-axis direction, and the second engaging portion 52 is located at the rear in the Y-axis direction.
As shown in fig. 16, the connection portion 65 extends in the X-axis direction. The accommodating portion 64 is located at an intermediate position with respect to the connecting portion 65 along the X-axis direction. The right side of the connecting portion 65 facing away from the stationary contact set 14 in the X-axis direction is provided with a pushing portion 66, where "back side" means that the face faces away from the stationary contact set 14. The pushing portion 66 extends from front to back in the Y-axis direction, and is adapted to act on the micro switch 8, so that the micro switch 8 can sense the state in which the relay 1 is located. Specifically, when the armature assembly 10 is in the first position, the pushing portion 66 abuts against the micro switch 8, and when the armature assembly 10 is in the second position, the pushing portion 66 is away from the micro switch 8.
As shown in fig. 17, the bottom surface of the pusher card 58 is provided with a second guide 67 in the middle in the X-axis direction and in the Y-axis direction. The second guide portion 67 is slidably engaged with the first guide portion 26 in the Y-axis direction, and since the first guide portion 26 is a guide groove extending in the Y-axis direction in this embodiment, the second guide portion 67 is a guide projection extending in the Z-axis direction. The guide projection is inserted into the guide groove and slid in the Y-axis direction with respect to the guide groove, so that the first guide portion 26 guides the rectilinear motion of the push card 58 in the Y-axis direction. In other embodiments, the first guide portion 26 may be configured as a guide protrusion, and the second guide portion 67 may be configured as a guide slot, and any sliding fit structure known to those skilled in the art may be used to guide the pusher card 58 by the first guide portion 26.
As shown in fig. 18, the connecting portion 65 is provided with mounting holes 68 on both sides in the X-axis direction, respectively, the mounting holes 68 being for engagement with the guide 6. In the present embodiment, the mounting hole 68 is provided at the most edge position of the connecting portion 65 in the X-axis direction to make the guiding action of the guide 6 more remarkable.
As shown in fig. 18, in this embodiment, three limiting groups 69 are disposed on the connecting surface of the connecting portion 65 facing the static contact group 14 between the two mounting holes 68, and the number of the limiting groups 69 is the same as and corresponds to that of the movable contact group 13. The three stopper groups 69 are disposed symmetrically in the X-axis direction as a whole and face the corresponding contact cavities 29, respectively. Each of the stopper groups 69 is provided with two stoppers 70. The two stopper portions 70 are arranged in the Z-axis direction. In this embodiment, the limiting portion 70 is a connecting post protruding from the connecting surface.
As shown in fig. 18, in the present embodiment, the dimension in the X-axis direction of the longitudinal sections of the accommodating portion 64 among the longitudinal sections of the push card 58 perpendicular to the Y-axis direction is the smallest of the dimensions in the X-axis direction of the longitudinal sections of the push card 58. This means that no connecting rod having a smaller dimension than the accommodating portion 64 in the X-axis direction is provided between the accommodating portion 64 and the connecting portion 65 in the Y-axis direction.
As shown in fig. 18, the connector 59 is insert molded integrally with the pusher card 58 as already described. In the present embodiment, the number of the connecting members 59 is the same as and corresponds to the number of the movable contact groups 13. The connecting piece 59 is used for connecting with the corresponding limiting piece 61, so that the limiting piece 61 is fixed relative to the pushing card 58. In this embodiment, the number of the connection members 59 is three and arranged along the X-axis direction. The position of each connecting piece 59 in the Y-axis direction is the same as the position of the corresponding stopper group 69 in the Y-axis direction. In this embodiment, the connecting member 59 extends along the Z-axis direction, and two ends thereof extend out of the pushing card 58 to form two clamping portions 71. The engaging portion 71 is used for connecting the stopper 61.
Referring to fig. 19, fig. 19 shows a movable contact unit 63 in the present embodiment. The number of the movable contact units 63 is the same as and corresponds to the number of the movable contact groups 13. In the present embodiment, the number of the movable contact units 63 is three and is arranged along the X-axis direction. As described above, each movable contact unit 63 includes one movable contact group 13, one first magnetic conductive member 15, and one elastic support group 60.
The movable contact set 13 is driven by the pushing unit 62 to abut against or separate from the stationary contact set 14 along the Y-axis direction. When the armature assembly 10 is in the first position, the movable contact group 13 is away from the stationary contact group 14, the relay 1 is in the off state, and the electrical connection between the power source and the load in the external circuit is turned off. When the armature assembly 10 is in the second position, the movable contact group 13 abuts against the stationary contact group 14, the relay 1 is in a conductive state, and an electrical connection between a power source and a load in an external circuit is conductive.
As shown in fig. 19, the movable contact group 13 includes at least one movable contact 72, and in this embodiment, the movable contact group 13 includes more than two movable contacts 72, and a specific number of the movable contacts 72 are two, and each movable contact 72 is arranged at intervals along the Z-axis direction. The movable contact 72 is used for abutting against or moving away from the stationary contact set 14. Each movable contact 72 comprises an overcurrent bridge 73 and two movable contacts 74, which are fixedly connected to each other. The overcurrent bridge 73 is made of a metal having good electrical conductivity, and extends in the X-axis direction. Both the movable contacts 74 are made of a metal having good conductivity and are arranged in the X-axis direction. The two movable contacts 74 are respectively located at two sides of the front surface of the overcurrent bridge 73 facing the static contact set 14 along the X-axis direction. The two movable contacts 74 are a first movable contact 75 and a second movable contact 76, respectively, wherein the first movable contact 75 is located on the left side in the X-axis direction, and the second movable contact 76 is located on the right side in the X-axis direction. When the movable contact group 13 abuts against the stationary contact group 14, current flows from one of the movable contacts 74 to the other movable contact 74 through the flow bridge 73. For convenience of description, the setting current flows from the first movable contact 75 to the second movable contact 76 through the overcurrent bridge 73. Those skilled in the art will certainly appreciate that since the relay 1 in this embodiment is used to control the on-off of the ac power, such a setting is merely for convenience of description.
As shown in fig. 19, first set of magnetic conductors 15 includes at least one first magnetic conductor 77. The first magnetizers 77 may be the same as or different from the corresponding movable contacts 72 in the corresponding movable contact group 13 in number. In this embodiment, the first magnetizers 77 are the same as and correspond to the number of movable contacts 72 in the corresponding movable contact group 13. In the first magnetizer group 15, the number of the first magnetizers 77 is two, and each first magnetizer 77 is arranged at intervals along the Z-axis direction. In this embodiment, the first magnetizer 77 is fixedly connected with the corresponding movable contact 72. The first magnetizer 77 is provided with a body 78 and two extensions 79. The body 78 extends along the Z-axis direction and is located at the back of the guide bridge 73. In this embodiment, the body 78 is attached to the back surface of the guide bridge 73. The two extending portions 79 extend from two ends of the body 77 along the Z axis toward the static contact set 14 along the Y axis direction, and span the flow bridge 73 and even span the movable contact 74 along the Y axis direction, so that when the movable contact set 13 abuts against the static contact set 14, the extending portions 79 are close to the second magnetizer set 16. In other embodiments, first magnetic conductor 77 need not be in the shape of this embodiment, and may have only body 78, or only one extension 79. As long as the first magnetic conductor 77 is capable of forming a magnetic circuit with the second magnetic conductor set 79.
As shown in fig. 19, the elastic support set 60 is mounted on the push card 58. The elastic support set 60 stores energy when the movable contact set 13 abuts against the static contact set 14 along the Y-axis direction, and releases energy when the movable contact set 13 is away from the static contact set 14 along the Y-axis direction. The elastic support group 60 includes at least one elastic support 80. The number of the elastic supports 80 may be the same as or different from the number of the movable contacts 72 in the corresponding movable contact group 13. In this embodiment, the number of the elastic supports 80 is one. The elastic bracket 80 is provided with a bracket body 81 and at least one elastic supporting portion 82 integrally connected to each other. The support body 81 is fixed relative to the push card 58 and is provided with an adapting portion 83, and the number of adapting portions 83 is the same as and corresponds to the number of limiting portions 70 in the corresponding limiting portion group 69, in this embodiment, the number of adapting portions 83 is two and is distributed along the Z-axis direction. The stopper 70 is slidably engaged with the fitting portion 83 in the Y-axis direction to restrict movement of the holder body 81 perpendicular to the Y-axis direction. In this embodiment, the limiting portion 70 is a connecting post protruding from the connecting surface, the adapting portion 83 is a connecting hole, and the two connecting posts are inserted into the two connecting holes, so that the elastic support 80 has no degree of freedom in the other directions except the direction along the Y axis. In the present embodiment, the number of the elastic supporting portions 82 of each elastic support 80 is the same as and corresponds to the number of the movable contacts 72 in the corresponding movable contact group 13, but the number may also be different from and does not correspond to the number. In the present embodiment, the number of the elastic supporting portions 82 is two and is arranged along the Z-axis direction. Each movable contact 72 is mounted on a corresponding elastic support 82. In the present embodiment, each elastic supporting portion 82 includes two elastic arms 84, and the two elastic arms 84 extend from both sides of the holder body 81 in the X-axis direction, respectively, and are at least partially inclined away from the push card 85 in the Y-axis direction. The free ends of the two elastic arms 84 are respectively fixedly connected with the back surface of the overcurrent bridge 73, and the positions fixedly connected with the overcurrent bridge 73 are respectively positioned on the back surfaces of the first movable contact 75 and the second movable contact 76 along the Y-axis direction. The elastic supporting portion 82 may also adopt other structures, as long as the elastic supporting portion can store energy when the movable contact element set 13 abuts against the static contact element set 14, and release energy when the movable contact element set 13 is far away from the static contact element set 14.
Referring to fig. 20, fig. 20 shows a stopper 61 in the present embodiment. The number of the limiting pieces 61 is the same as and corresponds to the number of the movable contact sets 13. In this embodiment, the number of the limiting members 61 is three, and each limiting member 61 is disposed along the X-axis direction. The limiting member 61 is fixed relative to the push card 58 and is used for abutting each movable contact 72 along the Y-axis direction when the corresponding movable contact group 13 is far away from the static contact group 14 so as to limit the distance between each movable contact 72 and the static contact group 14. The stopper 61 includes an abutment portion 85 and two attachment portions 86. The abutment 85 extends along the Z axis. When the movable contact group 13 is far away from the stationary contact group 14, the overcurrent bridge 73 abuts against the abutting portion 85 along the Y-axis direction under the action of the elastic support 80. The abutment portion 85 is provided with escape holes 87 adapted to allow the respective extension portions 79 of the two first magnetizers 77 to protrude in the Y-axis direction, and in this embodiment, the number of escape holes 87 is three and arranged in the Z-axis direction. Two attaching portions 86 extend from both ends of the abutting portion 85 in the Z-axis direction away from the stationary contact group 14 in the Y-axis direction. Each of the attachment portions 86 is provided with a snap hole 88, and the snap hole 88 is adapted to snap-fit with a corresponding snap portion 71 on a corresponding connecting member 59, so that the stopper 61 is fixed relative to the push card 58.
Referring to fig. 21, fig. 21 shows the moving member 17 in the present embodiment. As shown in fig. 21, after the moving member 17 is assembled, the number of the armature assembly 10 and the push card 58 is one, and the number of the limiting portion group 70, the connecting member 59, the elastic support group 60, the limiting member 61, the moving contact group 13 and the first magnetizer group 15 is three. Each first magnetizer 77 in the first magnetizer set 15 is fixedly connected to a corresponding movable contact 72, and each movable contact 72 is fixedly connected to a corresponding elastic supporting portion 82. The elastic support 80 is slidably fitted on each of the limiting portions 70 of the corresponding limiting portion set 69, the limiting member 61 is clamped with the connecting member 59, and the abutting portion 85 abuts against the overflow bridge 73 of each movable contact 72 along the Y-axis direction, so as to limit the distance between each movable contact 72 and the static contact set 14, and limit the support body 81 along the Y-axis direction, so that the support body 81 is fixed relative to the push clamp 58.
Referring to fig. 22, fig. 22 shows the stationary contact set 14 in the present embodiment. The stationary contact set 14 is fixedly connected to the bottom shell 20. As shown in fig. 22, in the present embodiment, the number of the stationary contact sets 14 is the same as and corresponds to the number of the movable contact sets 13. In the present embodiment, the number of the static contact sets 14 is three and is arranged along the X-axis direction. The static contact group 14 is used for connecting one phase of three-phase alternating current. The stationary contact set 14 comprises two stationary contacts 89, both stationary contacts 89 being provided with stationary contacts 90 and load terminals 91. The two stationary contacts 89 are a first stationary contact 92 and a second stationary contact 93, respectively. The first and second stationary contacts 92 and 93 are arranged along the X-axis direction.
As shown in fig. 22, in the present embodiment, the first stationary contact 92 is provided with a first stationary contact 94, a first flow-through portion 95, a second flow-through portion 96, a third flow-through portion 97, and a fourth flow-through portion 98. The first stationary contacts 94 are the same as and correspond to the number of first movable contacts 75 in the corresponding movable contact group 13. In the present embodiment, the number of the first stationary contacts 94 is two and is arranged along the Z-axis direction. The first stationary contact 94 is adapted to abut against or move away from the corresponding first movable contact 75 in the Y-axis direction. Each first stationary contact 94 is fixedly connected to a first flow-through portion 95, and the first flow-through portion 95 extends along the Z-axis direction and is perpendicular to the Y-axis direction. The second flow-through portion 96 extends from an upper portion of the first flow-through portion 95 on the left side in the X-axis direction away from the movable contact group 13 in the Y-axis direction, and the second flow-through portion 96 penetrates the bottom case 20 in the Y-axis direction and protrudes from the front surface of the bottom case 20. The second flow-through portion 96 is perpendicular to the X-axis direction. The third flow-through portion 97 extends from one end of the second flow-through portion 96 in the Y-axis direction away from the first flow-through portion 95 to the left in the X-axis direction. The third flow-through portion 97 is perpendicular to the Y-axis direction. The fourth flow-through portion 98 extends from the third flow-through portion 97 in the bottom end of the Z-axis in the Y-axis direction away from the first flow-through portion 95. The fourth flow-through portion 98 is perpendicular to the Z-axis direction. In the present embodiment, the fourth overcurrent section 98 forms the first load terminal 99. The first load terminal 99 is used to connect one of the phases of the power supply or load. For convenience of description, the first load terminal 99 is set to be externally connected with a power supply.
As shown in fig. 22, in the present embodiment, the second stationary contact 93 is provided with a second stationary contact 100, a fifth overcurrent section 101, a sixth overcurrent section 102, a reverse overcurrent section 103, and a seventh overcurrent section 104. The second stationary contacts 100 are the same as and correspond to the number of second movable contacts 76 in the corresponding movable contact group 13. In the present embodiment, the number of the second stationary contacts 100 is two and is arranged along the Z-axis direction. The second stationary contact 100 is adapted to abut against or move away from the corresponding second movable contact 76 in the Y-axis direction. In the present embodiment, the first stationary contact 94 and the second stationary contact 100 are arranged in the X-axis direction. Each second stationary contact 76 is fixedly connected to a fifth flow-through portion 101, and the fifth flow-through portion 101 extends along the Z-axis direction and is perpendicular to the Y-axis direction. The sixth flow-through portion 102 extends in the Y-axis direction from the upper portion of the fifth flow-through portion 101 on the left side in the X-axis direction, and the sixth flow-through portion 102 is perpendicular to the X-axis direction. The reverse flow-through portion 103 extends leftward in the X-axis direction from one end of the sixth flow-through portion 102 in the Y-axis direction away from the fifth flow-through portion 101, and the reverse flow-through portion 103 is perpendicular to the Y-axis direction. The seventh flow-through portion 104 extends away from the fifth flow-through portion 101 in the Y-axis direction from the bottom end of the reverse flow-through portion 103 in the Z-axis direction. The seventh flow-through portion 104 penetrates the bottom case 20 and protrudes from the front surface of the bottom case 20. The seventh flow-through portion 104 is perpendicular to the Z-axis direction. The seventh overcurrent section 104 forms a second load terminal 105 at an end thereof remote from the fifth overcurrent section 101. The second load terminal 105 is used to external one of the load or the power source. For convenience of description, the second load terminal 105 is set to externally connect a load.
Referring to fig. 2 and 27, fig. 2 and 27 show the second magnetic conductor set 16 in the present embodiment. As shown in fig. 2, the second magnetic conductor sets 16 are the same as and correspond to the first magnetic conductor sets 15 in number. The second magnetic conductor set 16 is disposed opposite to the first magnetic conductor set 15 in the Y-axis direction. In the present embodiment, the number of the second magnetic conductor groups 16 is three and is arranged along the X-axis direction. The second set of magnetic conductors 16 includes at least one second magnetic conductor 106. The number of second magnetic conductors 106 may be the same as or different from the number of first magnetic conductors 77 in the corresponding first magnetic conductor set 15. In this embodiment, the second set of magnetic conductors 16 includes a second magnetic conductor 106. The second magnetizer 106 extends in the Z-axis direction in a flat plate shape. As previously described, the second magnetic conductor 106 is received in the receiving chamber 22 and is fixed relative to the housing 18. Like first magnetizer 77, second magnetizer 106 can also be L-shaped or 匚 -shaped. As long as the first and second magnetic conductor sets 15 and 16 are capable of forming a magnetic circuit. As shown in fig. 27, in the present embodiment, the second magnetizer 106 is covered with the insulator 107. In the present embodiment, the insulator 107 is formed in the case 18.
Referring to fig. 23 to 27, fig. 23 to 27 show the contact portion 5 in the present embodiment. As described above, in the present embodiment, the contact portion 5 includes the contact group 11 and the short-circuit resisting unit 12. The contact group 11 and the short circuit resisting unit 12 are the same in number and correspond. In the present embodiment, the number of the contact groups 11 is three. Each contact set 11 comprises a movable contact set 13 and a stationary contact set 14. Each anti-short circuit unit 12 comprises a first set of magnetic conductors 15 and a second set of magnetic conductors 16.
As shown in fig. 23, in the present embodiment, in the same contact set 11, the movable contact set 13 is adapted to abut against or separate from the stationary contact set 14 along the Y-axis direction. As already mentioned, when the armature assembly 10 is in the first position, the movable contact group 13 is distant from the stationary contact group 14 in the Y-axis direction, the relay 1 is in the off-state, and the electrical connection of the external circuit is turned off; when the armature assembly 10 is in the second position, the movable contact group 13 abuts against the stationary contact group 14 along the Y-axis direction, the relay 1 is in a conductive state, and the electrical connection of the external circuit is conducted. Specifically, each first movable contact 75 in the movable contact set 13 is adapted to abut against or separate from each first stationary contact 94 in the stationary contact set 14 along the Y-axis direction, and each second movable contact 76 in the movable contact set 13 is adapted to abut against or separate from each second stationary contact 100 in the stationary contact set 14 along the Y-axis direction.
As shown in fig. 23, in the present embodiment, the second magnetizer 106 is located between each first stationary contact 94 and each second stationary contact 100 in the corresponding stationary contact group 14 along the X-axis direction. The second magnetizer 106 is also located between the overcurrent bridge 73 and the reverse overcurrent section 103 in the Y-axis direction. When the movable contact set 13 abuts against the stationary contact set 14, the extension 79 of each first magnetizer 77 in the first magnetizer set 15 approaches the insulator 107 covering the second magnetizer set 16. An insulator 107 that encloses the second magnetic conductor set 16 is formed in the housing 18 and is located between the first stationary contact 92 and the second stationary contact 93 in the X-axis direction. Each protrusion 23 provided on the insulator 107 is used to increase the creepage distance between the first stationary contact 92 and the second stationary contact 93 in the X-axis direction. The protrusions 23 may be grooves, and the protrusions 23 or grooves may be one or more, and the protrusions 23 or grooves may be arranged along the X-axis direction when the protrusions 23 or grooves are more than one. The extending direction of each projection 23 or recess intersects the X-axis direction. In this embodiment, the protrusions 23 or grooves extend in the Y-axis direction.
As shown in fig. 24, when the movable contact set 13 abuts against the stationary contact set 14, the electrical connection between the power source and the load is conducted. At this time, the current flow direction K flows from the power supply to the load through the first load terminal 99 (fourth overcurrent section 98), the third overcurrent section 97, the second overcurrent section 96, the first overcurrent section 95, the first stationary contact 94, the first movable contact 75, the overcurrent bridge 73, the second movable contact 76, the second stationary contact 100, the fifth overcurrent section 101, the sixth overcurrent section 102, the reverse overcurrent section 103, the seventh overcurrent section 104, and the second load terminal 105, as shown in the drawing. At this time, the current passing through the bridge 73 is rightward in the X-axis direction, and the current passing through the reverse current passing portion 103 is leftward in the X-axis direction, and the current directions are opposite. As can be seen from the right-hand screw theorem, the current passing through the overcurrent bridge 73 forms a third magnetic field L, and the current passing through the reverse overcurrent 103 forms a fourth magnetic field M.
As shown in fig. 25 to 27, in the third magnetic field L formed by the overcurrent bridge 73, the two first magnetizers 77 and the second magnetizers 106 are magnetized and form two magnetic circuits. In the body 78 of the first magnetizer 77, the magnetic induction line direction of the magnetic circuit is from the bottom to the top in the Z-axis direction, in the extension 79 of the first magnetizer 77 at the top in the Z-axis direction, the magnetic induction line direction of the magnetic circuit is from the back to the front in the Y-axis direction, in the second magnetizer 106, the magnetic induction line direction of the magnetic circuit is from the top to the bottom in the Z-axis direction, in the extension 79 of the first magnetizer 77 at the bottom in the Z-axis direction, the magnetic induction line direction of the magnetic circuit is from the front to the back in the Y-axis direction. The magnetic circuit formed based on the third magnetic field L causes attraction between the first magnetizer 77 and the second magnetizer 106, and the greater the current, the greater the attraction between the two. The fourth magnetic field M formed by the reverse overcurrent unit 103 affects the second magnetizer 106, and the direction of the magnetic induction line of the fourth magnetic field M on the second magnetizer 106 side is the same as the direction of the magnetic induction line of the magnetic circuit in the second magnetizer 106 from top to bottom along the Z-axis direction, so that the attraction force formed between the first magnetizer 77 and the second magnetizer 106 is stronger.
Referring to fig. 28 and 29, fig. 28 and 29 show the guide 6 in the present embodiment. The guide 6 is used for guiding the linear movement of the push card 58 in the Y-axis direction. As shown in fig. 29, the guide 6 extends in the Y-axis direction. In this embodiment, the guide 6 is made of metal. One of the push card 58 and the housing 18 is fixedly connected with the guide member 6, and the other is in sliding fit with the guide member 6 along the Y-axis direction. In this embodiment, the push card 58 is fixedly connected to the guide member 6, and the housing 18 is slidably engaged with the guide member 6. The number of the guide members 6 may be one or more, and in this embodiment, the number of the guide members 6 corresponds to the number of the engaging portion groups 27. The number of guide members 6 is two and is arranged along the X-axis direction. The guide 6 passes through a corresponding mounting hole 68 in the pusher card 58 and is secured to the pusher card 58 by an interference fit with the mounting hole 68. The guide 6 is in sliding engagement with two engagement portions 28 of the corresponding engagement portion group 27, respectively, and in particular with the guide groove. The position where the guide 6 passes through the mounting hole 68 is located between the two mating parts 28 of the corresponding mating part group 27 in the Y-axis direction.
Referring to fig. 29 to 31, fig. 29 to 31 show the elastic member 7 in the present embodiment. As shown in fig. 29, the elastic member 7 is mounted to the bottom case 20 and serves to provide a pushing assistance when the armature assembly 10 moves from the first position to the second position. The number of the elastic members 7 may be one or plural, and in this embodiment, the number of the elastic members 7 is two. The two elastic members 7 are respectively located on both sides of the push card 58 in the X-axis direction and on the back of the connecting portion 65. The elastic member 7 is fixedly connected to the bottom case 17 and has elasticity. In the present embodiment, the elastic member 7 is also provided corresponding to the guide member 6. The elastic piece 7 stores energy due to deformation when the movable contact piece group 9 moves in a direction away from the static contact piece group 10, and recovers deformation energy release when the movable contact piece group 9 moves in a direction close to the static contact piece group 10. As shown in fig. 30, the elastic member 7 is provided with a fixing portion 108, a first bending portion 109, a pushing surface 110, and a relief groove 111, which are integrally connected to each other. The fixing portion 108 is fixedly connected to the bottom case 20, and the first bending portion 109 is bent to make the elastic member 7 have elasticity. As shown in fig. 30 and 31, the pushing surface 110 is used to push against the back surface of the connecting portion 65. The escape groove 111 is provided for the corresponding guide 6 to pass through, and is configured not to contact the guide 6.
Referring to fig. 29 and 32, fig. 29 and 32 show the micro switch 8 in the present embodiment. The micro switch 8 in this embodiment is used to send a relay status signal to an external relay status sensing circuit. As shown in fig. 29, the micro switch 8 includes two fixed contacts 112 and one movable spring 113. As shown in fig. 32, two fixed contacts 112 are disposed along the X-axis direction, the fixed contacts 112 are fixedly connected to the bottom case 20 and extend along the Z-axis direction, and the two fixed contacts 112 are each provided with a signal output terminal 114, and the signal output terminals 114 penetrate through the bottom case 20 along the Z-axis direction and extend out of the bottom surface of the bottom case 20 to be electrically connected with the relay state sensing circuit (see fig. 2). In this embodiment, the movable spring 113 is provided with a fixing portion 115, a second bending portion 116, and a bridging portion 117. The fixing portion 115 is fixedly connected to the bottom case 20, and the bridging portion 117 is used for conducting the two fixed contacts 112. The second bending portion 116 is located between the fixing portion 115 and the bridging portion 117, and forms a bending to make the movable spring 113 have elasticity. The moving spring 113 is adapted to be pushed by the pushing portion 66 to deform to abut against the two fixed contacts 112, and to resume the deformation away from the two fixed contacts 112 when the pushing portion 66 is away. As can be seen from the above description, when the armature assembly 10 is in the first position, the pushing portion 66 pushes the moving spring 113, so that the moving spring 113 deforms and abuts against the fixed contact 112, so as to send a relay state signal that the relay 1 is in the off state to the relay state sensing circuit. When the armature assembly 10 is in the second position, the pushing portion 66 is away from the moving spring 113, and the moving spring 113 resumes its deformation and is away from the fixed contact 112, so as to send a relay state signal to the relay state sensing circuit that the relay 1 is in the on state.
The working principle of the relay 1 in the present embodiment is described below, wherein the working principle of the magnetic circuit portion 3 is described above and will not be described again.
Referring to fig. 28, fig. 28 shows a structure in which the relay 1 is in an initial state. As shown in fig. 28, in the initial state, the relay 1 is in the off state. At this point, the armature assembly 10 remains in the first position. At this time, the movable contact set 13 is away from the stationary contact set 14 and abuts against the limiting member 61 in a direction toward the stationary contact set 14. The electrical connection between the first load terminal 99 and the second load terminal 105 is turned off and the power supply fails to supply power to the load. The pushing card 58 pushes against the elastic piece 7 along the direction away from the static contact piece group 14, and the elastic piece 7 deforms to store energy. The pushing portion 66 pushes the moving spring 113, so that the moving spring 113 deforms and abuts against the two fixed contacts 112, the two signal output terminals 114 are mutually conducted, and the relay state sensing circuit senses that the relay 1 is in the off state.
Upon receipt of the first pulse signal at the signal input terminal 36, the coil winding 32 temporarily forms a first magnetic field, and the two magnetic drive ends 39 drive the armature assembly 10 with a magnetic drive force away from the first position toward the second position in the Y-axis direction. At this time, the elastic member 7 and the movable spring 113 resume their deformation and release their energy. The moving part 17 moves in the direction of the static contact group 14 with acceleration under the action of the magnetic driving forces of the two magnetic driving ends 39 and the elastic force of the elastic piece 7 and the movable spring 113, and after the movable contact group 13 abuts against the static contact group 14, the first load terminal 99 and the second load terminal 105 are electrically conducted, and the power supply supplies power to the load through the relay 1. The armature assembly 10 and the pusher card 58 continue to move toward the stationary contact 14 upon entering an overstroke under the magnetic driving force of the two magnetic driving ends 39. The elastic support set 60 starts to store energy, and the movable contact set 13 no longer abuts against the limiting piece 61 until the armature assembly 10 is limited by the two magnetic driving ends 39, and the armature assembly 10 moves to the second position.
Referring to fig. 25, fig. 25 shows a structure in which the relay 1 is in an on state. As shown in fig. 25, when the armature assembly 10 moves to the second position, the movable contact set 13 abuts against the stationary contact set 14, the electrical connection between the first load terminal 99 and the second load terminal 105 is conducted, and the power source supplies power to the load. The movable contact group 13 does not abut against the limiting piece 61 any more, and the elastic support group 60 stores energy. The pushing card 58 is far away from the elastic piece 7 to enable the elastic piece 7 to recover deformation, the pushing part 66 is far away from the movable spring 113 to enable the movable spring 113 to recover deformation and far away from the two fixed contact pieces 112, the two signal output terminals 114 are turned off, and the relay state sensing circuit senses that the relay 1 is in a conducting state. As shown in fig. 25, when the armature assembly 10 is moved to the second position, the barrier 30 abuts the pusher card 58 to block adjacent contact cavities 29. It should be noted that in other embodiments, the blocking portion 30 may be disposed on the push card 58, as long as the blocking portion 30 is located between the adjacent contact sets 11 when the movable contact set 13 abuts against the stationary contact set 14.
After the first pulse signal is extinguished, the relay 1 is maintained in the on state due to the magnetic holding force of the magnetic circuit portion 3.
Upon receipt of the second pulse signal at the signal input terminal 36, the coil winding 32 temporarily forms a second magnetic field, and the two magnetic drive ends 39 drive the armature assembly 10 with a magnetic drive force from the second position toward the first position in the Y-axis direction. At this time, the elastic support group 60 recovers the deformation and releases the energy, and the armature assembly 10 and the push clip 58 move in the direction away from the static contact group 14 with the acceleration under the magnetic driving forces of the two magnetic driving ends 39 and the elastic force of the elastic support group 60 until the movable contact group 13 leaves the static contact group 14, and the deformed portion of the elastic support group 60 recovers and pushes the movable contact group 13 to abut against the limiting piece 61. At this time, the electrical connection between the first load terminal 99 and the second load terminal 105 is turned off, the relay 1 is in the off state, and the power supply cannot supply power to the load. Afterwards, the moving part 17 as a whole continues to move in a direction away from the static contact piece group 14, and the pushing card 58 pushes against the elastic piece 7, so that the elastic piece 7 deforms and stores energy; the pushing portion 66 pushes the moving spring 113, so that the moving spring 92 deforms to store energy and abuts against the two fixed contacts 112, the two signal output terminals 114 are electrically conducted, and the relay state sensing circuit senses that the relay 1 is in the off state. Finally, the movement of the armature assembly 10 is limited by the two magnetic drive ends 39 and the armature assembly 10 moves to the first position shown in fig. 28.
After the second pulse signal is extinguished, the relay 1 is maintained in the off state due to the magnetic holding force of the magnetic circuit portion 3.
The electric meter in this embodiment employs the relay 1 described above.
As shown in fig. 33, the ammeter 1 in the present embodiment further includes a transformer 118. The transformer 118 is used to convert a large current to a small current for measurement. In this embodiment, the number of the transformers 118 is three, and the three transformers 118 are arranged along the X-axis direction and are respectively arranged on the portions of the second static contact members 93 of the three static contact member groups 14 extending out of the accommodating member 2. In other embodiments, the first stationary contacts 92 of the three stationary contact sets 14 may be respectively disposed on the portion extending from the accommodating element 2.
The present embodiment is a very innovative improvement of the magnetic circuit portion 3 of the swing type magnetic latching relay in the prior art. In the present embodiment, on the basis of the coil assembly 9 of the swing type magnetic latching relay, the two armatures 43 fixedly connected with the permanent magnet pieces 42 are improved from parallel arrangement to mutually crossed parts 55 which are mutually crossed, so that the armature assembly 10 can swing from the opposite coil assembly 9 to linearly move relative to the coil assembly 9. Compared to the magnetic circuit portion 3 of the swing type magnetic latching relay in the prior art, there is no loss of radial component of the swing stroke of the swing type magnetic latching relay due to the linear movement of the armature assembly 10 with respect to the coil assembly 9. The space utilization of the relay 1 can be made higher, and more advantageous conditions can be created for increasing the safety distance between the movable contact 72 and the stationary contact 89 in a limited space. Compared to the magnetic circuit portion 3 of the direct-acting magnetic latching relay in the prior art, since the two magnetic driving ends 39 are disposed along the X-axis direction and the linear movement direction of the armature assembly 10 is the Y-axis direction perpendicular to the X-axis direction, the magnetic circuit portion 3 in the present embodiment does not require a long length of the relay 1 in one direction (whether the X-axis direction or the Y-axis direction), so that the relay 1 can more easily accommodate a limited space, and a more advantageous condition can be created for increasing the safety distance between the movable contact 72 and the stationary contact 89 in the limited space.
In the embodiment, since the two armatures in the armature assembly 10 are improved to be crossed with each other on the basis of the coil assembly 9 of the swinging type magnetic latching relay, a first magnetic circuit part without any air gap can be formed between the two actuating ends 50 of the armature assembly 10 through the permanent magnet piece 42 and the two armatures 43, and a second magnetic circuit part penetrating through the whole coil assembly 9 can also be formed between the two magnetic actuating ends 39 of the coil assembly 9, and the first part and the second part can form a complete magnetic circuit in both the magnetic latching state and the magnetic actuating state, and the complete magnetic circuit can not cause larger magnetic loss due to larger air gap between the two actuating ends 50 of the armature assembly 10, so the magnetic loss is smaller, the magnetic efficiency is higher, and the movement stroke of the movable contact piece 72 can be increased under the condition that the power consumption of the coil assembly 9 is not increased; in the case where the magnetic driving force is equivalent, the power consumption required for the coil assembly 9 to realize the magnetic driving can be reduced, which is advantageous in that the size of the coil assembly 9 is made smaller, and thus, more advantageous conditions can be created for increasing the safety distance between the movable contact 72 and the stationary contact 89 in a limited space. In addition, in the direct-acting magnetic latching relay in the prior art, in the magnetic latching state, two magnetic loops which are mutually resistant are often formed, one magnetic loop passes through the yoke iron plate, the other magnetic loop passes through the static iron core, and the directions of the magnetic acting forces of the two magnetic loops to the movable iron core are opposite, and the magnetic loops in the embodiment penetrate through the coil assembly 9, so that the problem mentioned above cannot exist, compared with the direct-acting magnetic latching relay in the prior art, the magnetic acting force in the magnetic latching is larger, and particularly when the relay 1 is impacted by a fault and a large current, the armature assembly 10 is less prone to getting out of the magnetic latching state and moving, so that destructive arc pulling caused by the separation of the movable contact 72 and the static contact 89 due to the fault current is avoided.
In this embodiment, when the coil assembly 9 is excited by the pulse electric signal to reverse the polarity temporarily formed by the two magnetic driving ends 39 in the magnetic holding state when the armature assembly 10 is in the first position, not only the two magnetic driving ends 39 generate magnetic repulsive force to the first engaging portion 51 and the third engaging portion 53, but also the first portion of the push magnetic circuit without air gap is formed between the fourth engaging portion 54 and the second engaging portion 52 by the armature assembly 10, the two magnetic driving ends 39 form the second portion of the push magnetic circuit penetrating the whole coil assembly 9 by the coil assembly 9, and the first portion and the second portion of the push magnetic circuit form a complete push magnetic circuit, only the necessary travel air gap is formed in the push magnetic circuit, but no other air gap is formed, so the magnetic efficiency is higher, the magnetic driving force acting on the armature assembly 10 by the two magnetic driving ends 39 under the same power consumption is stronger, and the safety distance between the movable contact 72 and the static contact 89 is more favorable. Also, in the case where the armature assembly 10 is in the magnetic holding state in the second position, when the coil assembly 9 is energized by the pulse electric signal to reverse the temporarily formed polarity of the two magnetic driving terminals 39, not only are the two magnetic driving terminals 39 generating magnetic repulsive forces to the fourth engaging portion 54 and the second engaging portion 52, but also the first portion of the push magnetic circuit without an air gap is formed between the first engaging portion 51 and the third engaging portion 53 by the armature assembly 10, the two magnetic driving terminals 39 form the second portion of the push magnetic circuit through the entire coil assembly 9 by the coil assembly 9, and the first portion and the second portion of the push magnetic circuit constitute a complete push magnetic circuit, in which only an air gap of course necessarily exists, but no other air gap is formed, thereby having the same technical effect.
In this embodiment, when the armature assembly 10 is in the magnetic retaining state at the second position and the movable contact piece 72 abuts against the static contact piece 89 to conduct the external circuit, the first portion of the retaining magnetic circuit without the air gap is formed between the second engaging portion 52 and the fourth engaging portion 54 by the armature assembly 10, the two magnetic driving ends 39 form the second portion of the retaining magnetic circuit penetrating the whole coil assembly 9 by the coil assembly 9, and the first portion and the second portion of the retaining magnetic circuit form a complete retaining magnetic circuit, and the retaining magnetic circuit is completely closed when the second engaging portion 52 and the fourth engaging portion 54 engage the two magnetic driving ends 39, and when the second engaging portion 52 and the fourth engaging portion 54 are disposed close to the two magnetic driving ends due to other reasons, the air gap is small, so that the magnetic efficiency of the armature assembly 10 in the magnetic retaining state can be improved, the magnetic retaining attraction force is larger, and the reliability is higher. Particularly, when the relay 1 is impacted by a fault high current, the armature assembly 10 is less prone to moving out of a magnetic holding state, so that destructive arc discharge caused by the fact that the movable contact 72 and the static contact 89 are separated due to the fault current can be avoided.
In the present embodiment, for the two magnetic driving ends 39 arranged in the X direction, the magnetic fields of the two attracting portions 50 attracted to or close to the two magnetic driving ends are both derived from the same permanent magnet member 42. Thus, the armature assembly 10 experiences a relatively small amount of magnetic urging force during movement from the first position to the second position or vice versa. Therefore, the balance of the magnetic pushing force is better when the relay 1 is switched on and off, the linear motion of the armature assembly 10 is less prone to deflection, the relay 1 is less prone to jamming and the service life is longer.
In this embodiment, since the first engaging portion 51 and the second engaging portion 52 are located at two ends of the first armature 48 along the X-axis direction, and the third engaging portion 53 and the fourth engaging portion 54 are located at two ends of the second armature 49 along the X-axis direction, respectively, the position where the first armature 48 is fixedly connected to the permanent magnet member 42 is located between the first engaging portion 51 and the second engaging portion 52, and the position where the second armature 49 is fixedly connected to the permanent magnet member 42 is also located between the third engaging portion 53 and the fourth engaging portion 54, the arrangement is such that the difference of the magnetic field strength of the two engaging portions 50 of the same armature 43 is smaller, and the magnetic driving forces of the coil assembly 9 in two strokes are smaller when the armature assembly 10 is in the magnetic driving state. Secondly, since the first engaging portion 51 and the fourth engaging portion 54 are disposed along the Y-axis direction, the third engaging portion 53 and the second engaging portion 52 are disposed along the Y-axis direction, the first engaging portion 51 and the third engaging portion 53 are disposed along the X-axis direction, and the fourth engaging portion 54 and the second engaging portion 52 are disposed along the X-axis direction, the four engaging portions 50 of the armature assembly 10 are respectively located at the four peak positions of the rectangle on the first projection plane U, which is convenient for adjusting the dimensions of the armature assembly 10 along the X-axis direction and the Y-axis direction, and is more beneficial for creating more favorable conditions for increasing the safety distance between the movable contact 72 and the stationary contact 89 in a limited space.
In this embodiment, the magnetic circuit portion 3 forms a closed magnetic circuit when the armature assembly 10 is located at the second position, and the magnetic circuit portion has smaller magnetic loss, stronger magnetic retention and stronger capability of resisting the impact of fault current than the fourth engaging portion 54 and the second engaging portion 52 which are only adjacent to the two magnetic driving ends 39.
In the present embodiment, the two magnetic driving ends 39 extend along the X-axis direction to limit the movement of the armature assembly 10 from the first position to the second position and/or the movement from the second position to the first position, so that the movement stroke of the armature assembly 10 along the Y-axis direction is more determined, which is beneficial to ensuring the safety distance between the movable contact 72 and the static contact 89.
In this embodiment, the axis of the coil winding 9 is perpendicular to the moving direction of the armature assembly 10, so that the layout is beneficial to make room for the movement of the armature assembly 10 along the Y-axis, so that the whole magnetic circuit portion 3 is more compact in structure and occupies smaller space, and thus, more beneficial conditions are created for increasing the safety distance between the movable contact 72 and the static contact 89 in a limited space. Meanwhile, in the above layout, under the condition that other components of the relay 1 are not more in the axial direction of the coil winding 9, the limited space is more easily and fully utilized, the axial length of the coil winding 9 is prolonged, the coil winding 9 can output larger magnetic field intensity, and therefore the magnetic driving force of the two magnetic driving ends 39 is favorably increased, and more favorable conditions are created for increasing the safety distance between the movable contact 72 and the static contact 89 in the limited space.
In this embodiment, the two magnetic poles of the permanent magnet member 42 are arranged along the Y-axis direction, and compared with the alternative arrangement along the X-axis direction or the Z-axis direction, the contact area between the permanent magnet member 42 and the two armatures 43 is larger, the magnetic conduction effect is better, excessive bending of the two armatures 43 can be avoided, the structural complexity and manufacturing difficulty of the two armatures 43 can be reduced, and the size of the armature assembly 10 can be reduced.
In this embodiment, the two armatures 43 are provided with the narrower section 56 and the wider section 57, and the intersecting portions 55 are located in the narrower section 56, which is advantageous in that the width of the armature assembly 10 in the Z-axis direction is not increased on the premise that the intersecting portions 55 are disposed at intervals in the Z-axis direction.
In this embodiment, the position where the armature 43 is fixedly connected with the permanent magnet member 42 is located in the wider section 57, which is beneficial to guiding the magnetic field of the permanent magnet member 42 to the armature 43 more fully, so that the magnetic acting force between the magnetic driving end 39 and the armature 43 is stronger, and thus, the movement stroke of the armature assembly 10 along the Y axis is beneficial to increasing the distance between the movable contact member 72 and the static contact member 89.
In this embodiment, the two wider sections 57 are located on both sides of the narrower section 56 along the X-axis direction, which is advantageous for obtaining a larger magnetic conduction cross section on both sides of the narrower section 56 along the X-axis direction.
In this embodiment, the number of permanent magnet pieces 42 is at least two and is respectively located at two sides of the intersecting portion 55, and each armature 43 is fixedly connected with the magnetic pole of the same polarity of each permanent magnet piece 42. Compared with only one permanent magnet piece 42, and the permanent magnet piece 42 can be located on one side of the intersecting part 55, the consistency of the magnetic field intensity of the armature assembly 10 along the two sides of the X-axis direction is better maintained, the linear motion of the armature assembly 10 is less prone to deflection, the relay 1 is less prone to jamming and the service life is longer.
In the present embodiment, the permanent magnet pieces 42 are disposed on two sides of the intersecting portion 55, so that the space occupied by the armature assembly 10 is fully utilized to increase the magnetic force between the magnetic driving end 39 and the armature assembly 10 without increasing the dimensions of the armature assembly 10 along the Y-axis direction and the Z-axis direction, which is more beneficial to increasing the safety distance between the movable contact piece 72 and the static contact piece 89. Because each permanent magnet piece 42 is connected together through two armatures 43, the difference of intensity on the magnetic field of each permanent magnet piece 42 is effectively weakened on two armatures 43, and the magnetic pushing force between the armatures 43 on two sides and the magnetic driving end 39 can be kept balanced along the X axis direction, so that the relay 1 is less prone to being blocked and has longer service life.
In this embodiment, when more than two permanent magnetic members 42 are used, more than two magnetic loops can be formed between the armature assembly 10 and the coil assembly 9, both in the magnetic holding state and in the magnetic driving state, and the magnetic force is greater due to the superposition of the two magnetic loops, which is more advantageous for increasing the distance between the movable contact member 72 and the stationary contact member 89 than the single permanent magnetic member 42.
In this embodiment, the projection of the armature assembly 10 on the first projection plane U is mirror symmetrical along the symmetry plane V perpendicular to the X axis, so that the consistency of the magnetic field intensity of the armature assembly 10 along the two sides of the X axis direction is better, the center of gravity is easier to be kept on the symmetry plane V, the linear motion of the armature assembly 10 is less prone to be askew, the relay 1 is less prone to be jammed and the service life is longer.
In the embodiment, each movable contact 72 is provided with an overcurrent bridge 73, a first movable contact 75 and a second movable contact 76, and the first stationary contact 92 and the second stationary contact 93 are electrically connected with an external circuit, respectively, so that the safety distance between the movable contact 72 and the stationary contact 89 is actually twice the distance between the movable contact 74 and the stationary contact 90, which is beneficial to increasing the safety distance between the movable contact 72 and the stationary contact 89. This is because, in the present embodiment, the safety distance between the movable contact 72 and the stationary contact 89 actually refers to the distance between the stationary contacts 90 of the two stationary contacts 89 conducted by the movable contact 72 when the movable contact 72 is away from the two stationary contacts 89, and thus the distance is twice the distance between the movable contact 74 on the actual movable contact 72 and the stationary contact 90 on the stationary contact 89. In addition, in this technical scheme, two static contact pieces 89 are connected with external circuit electricity respectively, compare in moving contact piece 72 and static contact piece 89 electricity connection external circuit respectively, and electric connection structure is simpler, and the assembly is more convenient.
In this embodiment, the number of the movable contact groups 13 is at least two, so that the relay 1 can control the on-off of more external circuits.
In this embodiment, the number of the movable contact element groups 13 is three, so that the relay 1 can control on-off of each phase of three-phase alternating current at the same time, and safety is improved.
In the present embodiment, each movable contact element group 13 is arranged along the X-axis direction and is abutted against or away from the corresponding static contact element group 14 along the Y-axis direction, which is more beneficial to fully utilizing the limited space and creating more favorable conditions for increasing the safety distance between the movable contact element 72 and the static contact element 89 than the alternative scheme that the arrangement direction and the movement direction of the movable contact element group 13 are the same; and the static contact element groups 14 corresponding to the movable contact element groups 13 are not shielded in the terminal extraction direction, so that the static contact element groups are easier to extract from the side surface of the container 2, and copper consumption is saved.
The layout manner of this embodiment also allows the coil assembly 9 whose axis extends along the X-axis direction to be free from the need of providing the contact portions 5 on both sides of the X-axis direction, so that the coil assembly 9 has a sufficient space in the axis direction, and the length of the coil assembly 9 can be increased in the X-axis direction as needed without increasing the overall size of the relay 1, thereby improving the magnetic driving force and being beneficial to increasing the safety distance between the movable contact 72 and the stationary contact 89.
In this embodiment, each movable contact group 13 includes at least two movable contacts 72, so that when an external circuit is conducted, current can be carried through the plurality of movable contacts 72, not only the number of movable contacts 74 and stationary contacts 90 is increased, but also the parallel connection between each movable contact 72 is achieved, the current carrying requirement of each movable contact 72 is reduced, the contact resistance is also reduced, and the relay 1 can better improve the load capacity.
In this embodiment, each movable contact 72 in each movable contact group 13 is arranged along the Z-axis direction, so that the space in the Z-axis direction is more fully utilized to increase the load capacity. The first movable contact 75 and the second movable contact 76 of each movable contact 72 are arranged along the X-axis direction, and the first movable contact 92 and the second movable contact 93 of the corresponding static contact group 14 are also necessarily arranged along the X-axis direction, and because each movable contact group is arranged along the X-axis direction, all the movable contacts 72 are arranged along the X-axis direction, so that all the movable contacts 72 extend along the Y-axis direction or extend along the Z-axis direction to lead the load terminal 91 out of the accommodating element 2, the layout of each movable contact 89 is more reasonable, the distance between the adjacent movable contacts 89 can be ensured, the limited space can be more fully utilized, and more favorable conditions are created for increasing the safety distance between the movable contacts 72 and the movable contacts 89. Meanwhile, as each static contact element 89 is distributed along the X-axis direction, the part of the static contact element 89 leading out of the accommodating element is easier to install the transformer 118.
In this embodiment, the static contact set 14 is disposed along the X-axis direction, and in the static contact set 14, two static contacts 89 are also disposed along the X-axis direction, so that six static contacts 89 are disposed along the X-axis direction, which is beneficial for connecting the static contacts 89 with an external circuit and for mounting a transformer 118 on the static contacts 89.
In this embodiment, the first current passing portion 95 extends along the Z-axis direction, so that the first stationary contact 94 is arranged along the Z-axis direction; the fifth overcurrent part 101 extends in the Z-axis direction so as to facilitate the arrangement of the second stationary contact 100 in the Z-axis direction.
In this embodiment, the second overcurrent portion 96 extends from the side of the first overcurrent portion 95 away from the second static contact 93 along the X-axis direction along the Y-axis direction, and the second overcurrent portion 96 is perpendicular to the X-axis direction, so that the second overcurrent portion 96 can provide a space for mounting the transformer 118 on the second static contact 93.
In this embodiment, the third current passing portion 97 extends from the end of the second current passing portion 96 away from the first current passing portion 95 along the Y-axis direction away from the second stationary contact 93 along the X-axis direction, and the fourth current passing portion 98 extends from the bottom end of the third current passing portion 97 along the Z-axis direction along the Y-axis direction, so as to facilitate connection of a power source or a load, and also facilitate installation of the transformer 118 for the seventh current passing portion 104.
In the present embodiment, the reverse overcurrent portion 103 extends along the X-axis direction, and the seventh overcurrent portion 104 extends from the reverse overcurrent portion 103 along the Y-axis direction and is perpendicular to the Z-axis direction, so that the seventh overcurrent portion 104 and the adjacent first stationary contact 92 are close to each other, and a sufficient space is formed to facilitate the installation of the transformer 118 while facilitating the control of the size of the entire relay 1 along the X-axis direction.
In this embodiment, the seventh overcurrent portion for mounting the transformer 118 is perpendicular to the Z-axis direction, so that the transformer 118 can be mounted, and the terminals of the transformer 118 can be extended in the Z-axis direction.
In this embodiment, the transformer 118 is suitable for being mounted on the seventh overcurrent portion 104 of the second contact member 93, so that the first static contact member 92 does not protrude too much from the accommodating member 2 along the X-axis direction, and particularly, after the transformer 118 is mounted, the transformer 118 does not protrude too much, so as to control the dimension of the whole relay 1 along the X-axis direction.
In this embodiment, in the present embodiment, the push card 58 is fixedly connected with the armature assembly 10, and each movable contact group 13 is mounted on the push card 58 and carried by the push card 58, so that the movement stroke of the armature assembly 10 along the Y-axis direction can be better converted into the movement stroke of the movable contact 72, and the loss of the driving force and the movement stroke is avoided. In comparison with the prior art pendulum type magnetic latching relay, the armature assembly 10 is fixedly connected with the push card 58 due to the adoption of the magnetic circuit part 3. Meanwhile, in comparison with the direct-acting magnetic latching relay of the prior art, the armature assembly 10 has a larger dimension in the X-axis direction perpendicular to the moving direction thereof due to the adoption of the magnetic circuit portion 3, rather than the linear movement realized by a push rod having a smaller diameter, the push card 58 of the present embodiment is used for mounting and carrying each movable contact group 13. Therefore, when the movable contact group 13 is laid in the X-axis direction, a problem of seizing or a reduction in life due to severe abrasion can be avoided.
In this embodiment, the push card 58 and the armature assembly 10 are integrally molded by insert injection, so that errors possibly generated in the assembly process of the armature assembly 10 and the push card 58 are avoided, the integration level of the push card 58 and the armature assembly 10 is higher, parts are fewer, and the limited space is fully utilized.
In the present embodiment, the dimension of the accommodating portion 64 along the X-axis direction is larger than the dimension along the Y-axis direction, and the dimension of the push card 58 along the X-axis direction is the smallest of the dimensions of the push card 58 along the X-axis direction in the longitudinal sections of the push card 58 perpendicular to the Y-axis direction, so that when the movable contact group 13 is arranged along the X-axis direction and the movable contact 72 is extended along the X-axis direction, the jam is less likely than the prior art.
In the present embodiment, the connection portion 65 for mounting and carrying each movable contact group 13 extends along the X direction perpendicular to the moving direction of the push card 58, so that the movable contact group 13 is advantageously arranged along the X axis direction.
In this embodiment, the elastic support set 60 stores energy when the movable contact set 13 abuts against the static contact set 14, and releases energy when the movable contact set 13 is far away from the static contact set 14, so that an additional repulsive force can be effectively generated between the movable contact set 13 and the static contact set 14 when the external circuit is controlled to be turned off, thereby helping the movable contact set 13 to be far away from the static contact set 14. Especially, in the case that the anti-short circuit unit 12 for resisting the fault and large current is further disposed between the movable contact group 13 and the static contact group 14, when the movable contact group 13 abuts against the static contact group 14, the current flowing through the movable contact 72 makes the anti-short circuit unit 12 form a magnetic loop, so that suction force is generated in the movable contact group 13 and the static contact group 14, and at this time, the repulsive force formed by the elastic force of the elastic support group 60 can offset or partially offset the corresponding suction force when the load current is normal, thereby helping the movable contact group 13 to be far away from the static contact group 14.
In the present embodiment, the elastic support set 60 includes the elastic supports 80, the number of the elastic supporting portions 82 is the same as and corresponds to the number of the movable contacts 72 in the movable contact set 13, and each movable contact 72 is mounted on the corresponding elastic supporting portion 82, so that each movable contact 72 can be adjusted by the independent elastic supporting portion 82, which is more beneficial for the first movable contact 75 and the second movable contact 76 on the movable contact 72 to reliably abut against the corresponding stationary contact set 14.
In this embodiment, the elastic supporting portion 82 includes two elastic arms 84 fixedly connected to the overflow bridge 73, so that the movable contact 72 can swing freely to adjust the posture.
In this embodiment, the positions where the two elastic arms 84 are fixedly connected to the overcurrent bridge 73 are located at the back sides of the first movable contact 75 and the second movable contact 76, respectively, so that the elastic force of the two elastic arms 84 can directly act on the two movable contacts 74, and the two movable contacts 74 can be further ensured to reliably abut against the corresponding stationary contact 89.
In the present embodiment, the limiting member 61 is fixed relative to the push card 58 and abuts against each movable contact 72 along the Y-axis direction when the corresponding movable contact group 13 is far away from the static contact group 14 to limit the distance between each movable contact 72 and the static contact group 14, so the setting of the limiting member 61 can ensure a safe distance between each movable contact 72 and the static contact group 14, and can avoid the problem that the distance between the partial movable contact 72 and the static contact group 14 is too short due to inconsistent elasticity of the elastic support group 60.
In this embodiment, the limiting portion 70 of the push card 58 is only in sliding fit with the adapting portion 83 of the stand body 81, and the movement of the elastic stand 80 along the Y axis is limited by the limiting member 61, so that the installation of the elastic stand 80 is simpler.
In this embodiment, the first guiding portion 26 and the second guiding portion 67 are slidably matched along the Y-axis direction, so that the linear motion of the push card 58 can be guided, jamming and skew during the motion of the push card 58 can be avoided, and each movable contact element 72 can be effectively ensured to reliably abut against the static contact element 89.
In this embodiment, the second guiding portion 67 is located at the middle of the push card 58 along the X axis direction, that is, is closer to the position of the center of mass of the whole moving part, which is more beneficial to guiding the movement of the push card 58, and avoids jamming and skew during the movement of the push card 58.
In this embodiment, the elastic member 7 stores energy due to deformation when the movable contact set 13 moves in a direction away from the static contact set 14, and releases energy due to recovery deformation when the movable contact set 13 moves in a direction close to the static contact set 14, so that the movement of the moving member 17 from the first position to the second position can be better assisted. It is advantageous to increase the movement stroke of the movable contact 72, and thus also to increase the safety distance between the movable contact 72 and the stationary contact 89.
In this embodiment, by providing the short circuit resisting unit 12, the first magnetizer group 15 and the second magnetizer group 16 can form a magnetic circuit when the movable contact group 13 passes current, so that an attraction force is formed between the first magnetizer group 15 and the second magnetizer group 16. The larger the current, the larger the attraction force, so that the moving contact group 13 can be prevented from being separated from the static contact group 14 when the large current impacts the contact portion 5 in failure, and destructive arcing can be prevented.
In this embodiment, the first magnetizer set 13 is at least partially located at the back of the overcurrent bridge 73, and the second magnetizer set 16 is at least partially located between the overcurrent bridge 73 and the reverse overcurrent portion 103, so that not only can the current of the movable contact 72 form a magnetic loop between the first magnetizer set 15 and the second magnetizer set 16, but also the reverse overcurrent portion 103 has the opposite current direction to the movable contact 72, so that the direction of the magnetic induction line of the magnetic field generated by the reverse overcurrent portion 103 on the side of the second magnetizer set 16 is the same as the direction of the magnetic induction line of the magnetic field generated by the overcurrent bridge 73 on the side of the second magnetizer set 16, the magnetic field strength of the second magnetizer set 16 is enhanced, the magnetic attraction between the second magnetizer set 16 and the first magnetizer set 15 is stronger, the movable contact set 15 and the static contact set 16 are less likely to be separated under the high fault current, the reliability of the relay 1 is higher, and the high current impact resistance is stronger.
In this embodiment, the second magnetizer set 16 is covered by the insulator 107, so that the creepage distance between the two static contacts 89 located at both sides of the same second magnetizer set 16 is increased, and the two static contacts 89 are not easy to be short-circuited due to the second magnetizer set 16.
In this embodiment, the insulator 107 is formed on the accommodating member 2, which occupies less space and has higher integration of the relay than if the insulator 107 is additionally provided.
In this embodiment, since the protrusion 23 or the groove is disposed on the outer surface of the insulator 107 wrapping the second magnetizer group 16, the creepage distance between the two static contacts 89 can be increased, and the two static contacts 89 are less likely to be conducted through the surface of the insulator 107, so that a short circuit phenomenon is less likely to occur.
In this embodiment, the extending direction of the protrusion 23 and the groove is intersected with or even perpendicular to the layout direction of the two static contacts 89, so that the creepage distance between the two static contacts 89 can be effectively increased.
In this embodiment, the first magnetizer 77 is disposed corresponding to the movable contact 72, the constraint of the magnetic circuit on the magnetic field generated by the overcurrent of the movable contact 72 is higher, the magnetic loss is smaller, and the attraction between the first magnetizer 77 and the second magnetizer 106 is larger. The first magnetizer 77 is fixedly connected to the movable contact 72, so that the first magnetizer 77 is more convenient to install.
In this embodiment, the two extending portions 79 span the movable contact 72 and are close to the second magnetic conductor set 16 when the movable contact 72 abuts against the two stationary contacts 89, so that the air gap between the first magnetic conductor set 15 and the second magnetic conductor set 16 is smaller and the attractive force between the first magnetic conductor set 15 and the second magnetic conductor set 16 is larger when the magnetic circuit is formed.
In this embodiment, the second magnetizer group 16 has only one second magnetizer 107, so that the installation is more convenient.
In this embodiment, the insulator 107 is formed on the accommodating member 2, which occupies less space and has a higher integration level than the relay 1 having the insulator 107.
In this embodiment, the second magnetizer set 16 is fixedly connected to the accommodating cavity 22 of the bottom shell 20, so that the second magnetizer set is easier to install.
In this embodiment, the barrier portion 30 is disposed between adjacent contact cavities, so as to prevent short circuit between adjacent static contact sets 14 from causing short circuit between three-phase alternating current and two phases, and prevent arc conduction to other contact sets 11 from causing short circuit between two phases when arcing occurs in part of the contact sets 11. In other embodiments, the barrier 30 is provided on the pusher card 58 to function accordingly.
In this embodiment, when the movable contact set 13 abuts against the static contact set 14, the blocking portion 30 blocks the adjacent contact cavities 29, so that the blocking effect of the blocking portion 30 is better.
In this embodiment, the baffle part 30 is formed on the accommodating part 2, is a part of the accommodating part 2, and can be integrally injection molded when manufacturing the accommodating part 2, so that the integration level is high and the manufacturing is simpler. The formation of the barrier 30 on the pusher card 58 also has a similar effect.
In this embodiment, when the movable contact set 13 abuts against the static contact set 14, the blocking portion 30 blocks the adjacent contact cavities 29. Therefore, the blocking effect of the blocking portion 30 is better.
In this embodiment, the coil accommodating chambers 24 are provided with a plurality of compartments 25 at both sides in the X-axis direction, respectively, so that the coil accommodating chambers 24 can be increased in size in the X-axis direction as needed to facilitate loading of longer coil assemblies 9 of the coil windings 32.
In this embodiment, the guide member 6 extends along the Y-axis direction, one of the accommodating member 2 and the pushing card 58 is fixedly connected with the guide member 6, and the other is slidably matched with the guide member 6, so that the linear motion of the pushing card 58 can be guided.
In the present embodiment, the two guide members 6 are disposed on both sides of the push card 58 in the X-axis direction, and can effectively guide the push card 58 no matter to which side the direction of movement of the push card 58 may be skewed, thereby better preventing the moving member 17 from being jammed or skewed.
In this embodiment, the position where the guide member 6 is slidably engaged with or fixedly connected to the push card 58 is located between the two engaging portions 70 of the corresponding engaging portion group 69 along the Y axis direction, so that the guide member 6 is advantageously kept extending along the Y axis direction when assembled, and is not inclined or rocked along the X axis. Further, when the gravitational direction is the Z-axis direction, the guide 6 can be carried, and the moving member 17 formed of the armature assembly 10, the push card 58, the respective movable contact groups 13, and the like can be carried by the guide 6. Particularly, when the number of movable contact element groups 13 is three and the movable contact element groups are arranged along the X-axis direction, the weight of the movable element 17 is large, and therefore, the two engaging portions 70 in the engaging portion group 69 bear the weight of the movable element 17 in the gravity direction of the movable element 17, so that the movable element 17 cannot be inclined in the gravity direction.
In this embodiment, the elastic member 7 stores energy due to deformation when the movable contact set 13 moves in a direction away from the static contact set 14, and releases energy due to recovery deformation when the movable contact set 13 moves in a direction close to the static contact set 14, so that the movement of the moving member 17 from the first position to the second position can be better assisted. It is advantageous to increase the movement stroke of the movable contact 72, and thus also to increase the safety distance between the movable contact 72 and the stationary contact 89.
In the present embodiment, by providing the micro switch 8 and allowing the operation of the push card 58 to act on the micro switch 8, the state of the relay 1 can be transmitted to the relay state sensing circuit via the micro switch 8.
Example two
The second embodiment is mainly different from the first embodiment in the magnetic circuit portion 3. In the magnetic circuit portion 3, the second embodiment is different from the first embodiment mainly in the structure of the armature assembly 10, and the two engaging portions 50 are only adjacent to the two magnetic driving ends 39, respectively, and do not engage the two magnetic driving ends 39, respectively, when the armature assembly 10 is in the second position.
First, the armature assembly 10 in the second embodiment is described differently from the armature assembly 10 in the first embodiment.
Referring to fig. 34-36, fig. 34-36 illustrate the armature assembly 10 of the second embodiment. As shown in fig. 34, in the second embodiment, the armature assembly 10 no longer includes the second permanent magnet piece 45, but only the first permanent magnet piece 44. The first permanent magnet 44 is located on the left side of the portion crossing each other in the X-axis direction. Thus, in this embodiment, the armature assembly 10 also no longer has a plane of symmetry V.
As shown in fig. 35, in the second embodiment, both armatures 43 are provided with one thicker portion 119 and two thinner portions 120. The two thinner portions 120 are located on both sides of the thicker portion 119 in the X-axis direction, respectively. The thickness of the thicker portion 119 is greater than the thickness of the thinner portion 120. The narrower section 56 is located in the thicker portion 119, and in this embodiment, the wider section 57 on either side of the narrower section 56 of each armature 43 is located partially in the thicker portion 119. The "thickness" in the second embodiment refers to the length of the projection of the magnetic conduction cross section of the armature 43 on the first projection plane U.
As shown in fig. 36, in the second embodiment, each armature 43 includes a base plate 121 and a thickening 122. In this embodiment, the thickness of the substrate 121 is uniform, and the thickness of the thickening sheet 122 is uniform. Of course, the thickness of the substrate 121 may be chosen to correspond to the thickness of the thickening 122. The thickening sheet 122 is fixedly connected to the substrate 121 and is bonded to the substrate 121 in the thickness direction to form a thicker portion 119. In the second embodiment, the substrate 121 is provided with the protruding portion 123 at the portion 55 where the substrate 121 crosses each other, the thickening piece 122 is provided with the step hole 124 at the corresponding portion, the substrate 121 is press-riveted with the thickening piece 122, and the protruding portion 123 is press-riveted after passing through the step hole 124. Of course, the substrate 121 and the thickening piece 122 may be fixed by other methods, but the thickening piece 122 is required to be attached to the substrate 121 along the thickness direction and directly contacted with each other.
Referring to fig. 37 to 42, fig. 37 to 42 show the operation principle of the magnetic circuit portion 3 in the second embodiment.
Fig. 37 shows a state of the magnetic circuit portion when the armature assembly 10 in the second embodiment is in the magnetic retaining state in the first position. As shown in fig. 37, when the armature assembly 10 is in the magnetic retaining state in the first position, the first engaging portion 51 engages the first magnetic drive end 40, and the third engaging portion 53 engages the second magnetic drive end 41. At this time, the magnetic circuit portion 3 forms a first closed magnetic circuit A1. The first closed magnetic circuit A1 returns from the first magnetic pole 46 of the first permanent magnet piece 44 to the first magnetic pole 46 of the first permanent magnet piece 44 via the first engaging portion 51, the first magnetic driving end 40, the first yoke 37, the iron core 33, the second yoke 38, the second magnetic driving end 41, the third engaging portion 53, the portion 55 where the second armature 49 crosses each other, the second magnetic pole 47 of the first permanent magnet piece 44, without any air gap therebetween, and through the entire coil assembly 9. Therefore, when the armature assembly 10 is in the magnetic retaining state in the first position, the first magnetic circuit A1 causes magnetic attraction between the first attraction portion 51 and the first magnetic driving end 40 and between the third attraction portion 53 and the second magnetic driving end 41, and the armature assembly 10 is retained in the first position with respect to the coil assembly 9.
Fig. 38 shows the state of the magnetic circuit portion 3 immediately after the coil assembly 9 in the second embodiment receives the first pulse electric signal. At this time, the coil winding 32 is excited by the first pulse electric signal to generate the first magnetic field, so that the first magnetic driving end 40 temporarily has the N-pole polarity, and the second magnetic driving end 41 temporarily has the S-pole polarity. Since the first magnetic driving end 40 and the first engaging portion 51 have the same polarity as each other and are both N-poles, the first magnetic driving end 40 generates a magnetic repulsive force to the first engaging portion 51; since the second magnetic driving end 41 and the third engaging portion 53 are both S-poles in polarity, the second magnetic driving end 41 generates a magnetic repulsive force to the third engaging portion 53. Furthermore, the magnetic circuit portion 3 forms a first pushing magnetic circuit B1 at this time. The first pushing magnetic circuit B1 returns from the first magnetic driving end 40 to the first magnetic driving end 40 via the first air gap P, the fourth engaging portion 54, the second magnetic pole 47 of the first permanent magnet member 44, the first magnetic pole 46 of the first permanent magnet member 44, the portion 55 where the first armature 48 crosses each other, the second engaging portion 52, the first air gap P, the second magnetic driving end 41, the second yoke 38, the iron core 33, the first yoke 37, and only two first air gaps P that must exist as travel gaps in the middle, and passes through the entire coil assembly 9. Therefore, when the coil assembly 9 just receives the first pulse electric signal, not only the first magnetic driving end 40 applies a magnetic repulsive force to the first engaging portion 51, but also the second magnetic driving end 41 applies a magnetic repulsive force to the third engaging portion 53, and due to the presence of the first pushing magnetic circuit B1, the first magnetic driving end 40 generates a magnetic attraction force to the fourth engaging portion 54, and the second magnetic driving end 41 generates a magnetic attraction force to the second engaging portion 52, so that the coil assembly 9 can form a third pushing force F3 to the armature assembly 10, pushing the armature assembly 10 to move from the first position to the second position along the Y axis direction.
Fig. 39 shows a state of the magnetic circuit portion 3 when the armature assembly 10 is driven to move to the second position by the coil assembly 9 in the second embodiment. As shown in fig. 39, the fourth engaging portion 54 reaches the force balance state when the armature assembly 10 moves closer to the first magnetic driving end 40 in the Y-axis direction, and the second engaging portion 52 reaches the force balance state when the armature assembly 10 moves closer to the second magnetic driving end 41 in the Y-axis direction, so that the fourth engaging portion 54 moves closer to the first magnetic driving end 40 when the armature assembly 10 moves to the second position, a third air gap R is formed therebetween, the second engaging portion 52 moves closer to the second magnetic driving end 41, and a third air gap R is formed therebetween. Upon movement of the armature assembly 10 to the second position, the first pulsed electrical signal and the first magnetic field have not yet been removed, the first magnetic drive end 40 remains temporarily N-polar, and the second magnetic drive end 41 remains temporarily S-polar. At this time, the magnetic circuit portion 3 forms a fifth magnetic circuit A5. The fifth closed magnetic circuit A3 returns from the first magnetic driving end 40 to the first magnetic driving end 40 through the third air gap R, the fourth engaging portion 54, the second magnetic pole 47 of the first permanent magnet 44, the first magnetic pole 46 of the first permanent magnet 44, the portion 55 where the first armature 48 crosses each other, the second engaging portion 52, the third air gap R, the second magnetic driving end 41, the second yoke 38, the iron core 34, and the first yoke 37. The fifth magnetic circuit A5 passes through the entire coil assembly 9. Therefore, when the armature assembly 10 has just moved to the second position, a magnetic attraction force is generated between the first magnetic drive end 40 and the fourth attraction portion 54 and between the second magnetic drive end 41 and the second attraction portion 52 due to the existence of the fifth magnetic circuit A5.
Fig. 40 shows the state of the magnetic circuit portion 3 when the armature assembly 10 in the second position is in the magnetic retaining state in the second embodiment. As shown in fig. 12, when the first pulse electric signal is extinguished, the first magnetic field is extinguished, and the first magnetic driving end 40 and the second magnetic driving end 41 no longer have the polarity generated by the first magnetic field. At this time, the fifth closed magnetic circuit A5 described above remains, wherein the fifth magnetic circuit A5 can be regarded as starting from the first magnetic pole 46 of the first permanent magnet 44, and its path is the same as that of the fifth magnetic circuit A5 shown in fig. 39. Due to the fifth magnetic circuit A5, a magnetic attraction force is generated between the first magnetic driving end 40 and the fourth attraction portion 54 and between the second magnetic driving end 41 and the second attraction portion 52, and the armature assembly 10 is maintained at the second position with respect to the coil assembly 9.
Fig. 41 shows the state of the magnetic circuit portion 3 immediately after the coil assembly 9 in the second embodiment receives the second pulse electric signal. At this time, as shown in fig. 13, the coil winding 32 is excited by the second pulse electric signal to generate the second magnetic field, so that the first magnetic driving end 40 temporarily has the S-pole polarity, and the second magnetic driving end 41 temporarily has the N-pole polarity. Since the first magnetic driving end 40 and the fourth engaging portion 54 have the same polarity as each other and are S-poles, the first magnetic driving end 40 generates a magnetic repulsive force to the fourth engaging portion 54; since the second magnetic driving end 41 and the second engaging portion 52 are both N-pole in polarity, the second magnetic driving end 41 generates a magnetic repulsive force to the second engaging portion 52. Furthermore, the magnetic circuit portion 3 forms a fifth pushing magnetic circuit B5 at this time. The third driving magnetic circuit B3 returns from the fifth magnetic driving end 41 to the second magnetic driving end 41 via the fourth air gap T, the third engaging portion 53, the portion 55 where the second armature 45 crosses each other, the second magnetic pole 47 of the first permanent magnet member 44, the first magnetic pole 46 of the first permanent magnet member 44, the first engaging portion 51, the fourth air gap T, the first magnetic driving end 40, the first yoke 37, the iron core 33, the second yoke 38, and only two fourth air gaps T that must exist as travel gaps in the middle, and passes through the entire coil assembly 9. Therefore, when the coil assembly 9 just receives the second pulse electric signal, not only the first magnetic driving end 40 applies a magnetic repulsive force to the fourth engaging portion 54, but also the second magnetic driving end 41 applies a magnetic repulsive force to the second engaging portion 52, and the first magnetic driving end 40 generates a magnetic attractive force to the first engaging portion 51 due to the fifth pushing magnetic circuit B5, and the second magnetic driving end 41 generates a magnetic attractive force to the third engaging portion 53, so that the coil assembly 9 can form a fourth pushing force F4 to the armature assembly 10, thereby pushing the armature assembly 10 to move from the second position to the first position along the Y-axis direction.
Fig. 42 shows a state of the magnetic circuit portion 3 when the armature assembly 10 is driven to move to the first position by the coil assembly 9 in the second embodiment. In the process of moving the armature assembly 10 from the second position to the first position, the first magnetic driving end 40 limits the movement of the first engaging portion 51 from the second position to the first position along the Y-axis direction, so that the first engaging portion 51 engages the first magnetic driving end 40; the second magnetic driving end 41 limits the movement of the third engaging portion 53 from the second position to the first position along the Y-axis direction, so that the third engaging portion 53 engages the second magnetic driving end 41. As shown in fig. 42, the second pulsed electrical signal and the second magnetic field have not yet been removed from the armature assembly 10 upon movement to the first position, the first magnetic drive end 40 remains temporarily S-polar, and the second magnetic drive end 41 remains temporarily S-polar. At this time, the magnetic circuit portion 3 still exists in the above-described first closed magnetic circuit A1, and the first closed magnetic circuit A1 can be regarded as starting from the second magnetic drive end 41, and its path is the same as that of the first closed magnetic circuit A1 shown in fig. 37. Therefore, when the armature assembly 10 has just moved to the first position, a magnetic attraction force is generated between the first magnetic drive end 40 and the first attraction portion 51 and between the second magnetic drive end 41 and the third attraction portion 53 due to the presence of the first closed magnetic circuit A1.
When the second pulse electric signal is extinguished, the second magnetic field is extinguished, and the first magnetic drive end 40 and the second magnetic drive end 41 no longer have the polarity generated by the second magnetic field. At this time, the armature assembly 10 is in a magnetically held state in the first position as shown in fig. 37.
The second embodiment is identical to the first embodiment except for the differences described above, and therefore has technical effects corresponding to those of the first embodiment.
In the second embodiment, the thickness of the thicker portion 119 is greater than that of the thinner portion 120, and the narrower section 56 is located in the thicker portion 119, so that the magnetic conduction cross section of the narrower section 56 is increased, and the narrower section 56 is no longer a bottleneck of the magnetic conduction cross section of the armature 43. Therefore, the magnetic field intensity of the two sides of the crossing portion of the whole armature 43 along the X-axis direction is more balanced and consistent, so that the magnetic pushing forces of the two magnetic driving ends 39 and the armature assembly 10 along the two sides along the X-axis direction are more balanced, the linear motion of the armature assembly 10 is less prone to deflection, the relay 1 is less prone to jamming and the service life is longer.
In the second embodiment, the wider sections 57 on both sides of the narrower section 56 are partially located at the thicker portion 119, so that the magnetic conduction section of the junction between the wider sections 57 and the narrower section 56 is larger, and the junction is not a bottleneck of the magnetic conduction section of the armature 43. Therefore, the magnetic field intensity of the two sides of the crossing portion of the whole armature 43 along the X-axis direction is more balanced and consistent, so that the magnetic pushing force between the two magnetic driving ends 39 and the armature assembly 10 along the X-axis direction is more balanced, the linear motion of the armature assembly 10 is less prone to deflection, the magnetic latching relay is less prone to jamming and the service life is longer.
In the second embodiment, the thicker portion 119 is formed by attaching the thickness-increasing sheet 122 to the substrate 121, so that the two armatures 43 can be manufactured by a sheet metal process using a plate material, and the manufacturing cost is lower and the manufacturing is more convenient.
In the second embodiment, even though the fourth engaging portion 54 and the second engaging portion 52 are only close to the two magnetic driving ends 39, the fifth magnetic circuit A5 and the fifth pushing magnetic circuit B5 can still be formed, so that the armature assembly 10 can still form a first magnetic circuit portion without any air gap, and a second magnetic circuit portion extending through the whole coil assembly 9 can also be formed between the two magnetic driving ends 39 of the coil assembly 9, the first portion and the second portion can still form a complete magnetic circuit, and the complete magnetic circuit cannot cause larger magnetic loss due to larger air gap between the two engaging portions 50 of the armature assembly 10, so that the magnetic loss is smaller, the magnetic efficiency is higher, and the movement stroke of the movable contact 72 can be increased without increasing the power consumption of the coil assembly 9; in the case where the magnetic driving force is equivalent, the power consumption required for the coil assembly 9 to realize the magnetic driving can be reduced, which is advantageous in that the size of the coil assembly 9 is made smaller, and thus, more advantageous conditions can be created for increasing the safety distance between the movable contact 72 and the stationary contact 89 in a limited space.
Example III
The third embodiment is different from the first embodiment in the guide member 6, the elastic member 7, and the fitting portion group 27.
Referring to fig. 43 and 44, fig. 43 and 44 show the guide 6, the elastic member 7, and the mating part group 27 in the third embodiment. As shown in fig. 43 and 44, in the third embodiment, the guide 6 is fixedly connected to the bottom case 20 and slidably engaged with the push card 58, specifically, the guide 6 is slidably engaged with the mounting hole 68.
As shown in fig. 44, in the third embodiment, the fitting portion group 27 is provided with a first fitting portion 125 and a second fitting portion 126 in the Y-axis direction. The first engaging portion 125 is further rearward than the second engaging portion 126 in the Y-axis direction. The second fitting portion 126 is not different from the fitting portion 28 in the first embodiment. The first fitting portion 125 is provided with a through hole, and the first fitting portion 125 is fixedly connected with the guide 6. The elastic member 7 employs a spring extending in the Y-axis direction. The elastic member 7 is sleeved on the guide member 6, one end of the elastic member is fixedly connected with the first matching portion 125, and the other end of the elastic member is suitable for propping against the back surface of the push card 58. The elastic member 7 still stores energy due to deformation when the movable contact element group 9 moves in a direction away from the static contact element group 10 and recovers deformation energy release when the movable contact element group 9 moves in a direction approaching to the static contact element group 10.
In this embodiment, the elastic member 7 is a spring, which is a standard member, and has lower cost and more convenient assembly than the elastic member 7 in the first embodiment.
Example IV
The fourth embodiment is different from the first embodiment in that: first, the second magnetizer group 16 in the fourth embodiment is installed in a different manner; second, the fourth embodiment differs from the first embodiment in that the engaging portion 30 is different from the engaging portion 2 and the push card 58.
Referring to fig. 45 to 47, fig. 45 to 47 show a relay 1 in the fourth embodiment.
As shown in fig. 45, in the fourth embodiment, the housing 18 no longer includes the blocking member 21, and the dispensing hole 127 is provided on the upper surface of the bottom housing 20 at a position corresponding to the accommodating cavity 22 along the Z-axis direction. After the assembly personnel loads the second magnetizer group 16 into the accommodating cavity 22, the second magnetizer group 16 is temporarily fixed in the accommodating cavity 22 through friction force, glue is dispensed from the dispensing hole 127 by the assembly personnel, and the glue penetrates into the accommodating cavity 22 through siphoning phenomenon to finally fix the second magnetizer group 16 in the accommodating cavity 22.
As shown in fig. 45, in the fourth embodiment, the barrier portion 30 is made of a high-temperature insulating material, specifically, made of ceramic in a sheet shape. The number of the barrier portions 30 is four, and the barrier portions are all arranged along the X-axis direction. Except that two blocking parts 30 located in the middle in the X-axis direction are arranged between the adjacent contact cavities 29, the other two are respectively arranged on the other sides of the contact cavities 29 on two sides in the X-axis direction, so that the blocking parts 30 are arranged on two sides of each contact cavity 29, and the blocking parts 30 are arranged on two sides of each contact cavity 29 in the X-axis direction. The pusher card 58 is provided with two relief grooves 128 along the X-axis direction. The two abdication grooves correspond to two blocking parts 30 positioned in the middle along the X-axis direction along the Y-axis direction, so that the blocking parts 30 block the adjacent contact cavities 29 when the movable contact element group 13 abuts against the static contact element group 14.
As shown in fig. 46 and 47, the bottom case 20 is provided with a first slot 129 corresponding to each of the barrier portions 30, and the cover 19 is provided with a corresponding second slot 130. The blocking part 30 is inserted into the first slot 129 along the Z-axis direction, and when the cover 19 is clamped to the housing 18, the blocking part 30 is also inserted into the second slot 130 along the Z-axis direction, so that the blocking part 30 is fixedly connected to the accommodating part 2.
In the fourth embodiment, the second magnetizer set 16 is finally fixed in the accommodating cavity 22 by using the dispensing hole 128 on the upper surface of the bottom shell 20, so that the second magnetizer set 16 is more convenient to install.
In the fourth embodiment, by adopting the barrier 127 made of the high-temperature-resistant insulating material, when the load of the relay 1 is large and the arc is pulled to generate a large amount of heat, the barrier 127 is prevented from being damaged by the heat of the arc, the barrier 127 is prevented from being damaged, and the load capacity of the relay 1 can be improved.
In the fourth embodiment, the barrier portion 30 is made of ceramic material, and the cost is lower.
In the fourth embodiment, when the movable contact set 13 abuts against the static contact set 14, the blocking portion 30 blocks the adjacent contact cavities 29. Therefore, the blocking effect of the blocking portion 30 is better.
In the fourth embodiment, the two sides of each contact cavity 29 along the X-axis direction are provided with the blocking parts 30, so that when the movable contact group 13 and the corresponding static contact group 14 at the most edge along the X-axis direction have arcing, the electric arc is not conducted to the side wall of the accommodating part 2, and the insulation performance of the accommodating part 2 is ensured.
In the fourth embodiment, the baffle part 30 is limited by the bottom shell 20 and the cover 19 together, so that the installation is more convenient.
The above description and examples are illustrative of the scope of the application and are not to be construed as limiting the scope of the application.
Claims (49)
1. A magnetic circuit portion for a magnetic latching relay (1), characterized by comprising:
The armature assembly (10) comprises a permanent magnet piece (42) and two armatures (43), wherein the two armatures (43) are fixedly connected with two magnetic poles of the permanent magnet piece (42) respectively, and the projections of the two armatures (43) on a first projection plane (U) perpendicular to the Z-axis direction are crossed with each other and the crossed parts (55) are arranged at intervals along the Z-axis direction; and
The coil assembly (9) is provided with two magnetic driving ends (39) which are distributed along the X-axis direction, and the coil assembly (9) is excited by a pulse electric signal to reverse the polarity formed temporarily by the two magnetic driving ends (39) so as to drive the armature assembly (10) to move along the Y-axis direction.
2. A magnetic circuit portion as claimed in claim 1, wherein:
the two armatures (43) are respectively a first armature (48) and a second armature (49); the first armature (48) is provided with a first attraction part (51) and a second attraction part (52), and the second armature (49) is provided with a third attraction part (53) and a fourth attraction part (54);
The armature assembly (10) moves between a first position and a second position along the Y-axis direction; in the first position, the first suction part (51) and the third suction part (53) are respectively sucked or close to the two magnetic driving ends (39); in the second position, the fourth engaging portion (54) and the second engaging portion (52) engage or are adjacent to the two magnetic drive ends (39), respectively.
3. A magnetic circuit portion as claimed in claim 2, wherein:
The first suction part (51) and the second suction part (52) are respectively positioned at two ends of the first armature (48) along the X-axis direction; the third suction part (53) and the fourth suction part (54) are respectively positioned at two ends of the second armature (49) along the X-axis direction;
The first suction part (51) and the third suction part (53) are arranged along the X-axis direction, and the fourth suction part (54) and the second suction part (52) are arranged along the X-axis direction;
The first suction portion (51) and the fourth suction portion (54) are arranged along the Y-axis direction, and the third suction portion (53) and the second suction portion (52) are arranged along the Y-axis direction.
4. A magnetic circuit part according to claim 2, characterized in that the magnetic latching relay is in a conducting state when the armature assembly (10) is in the second position, the fourth and second engaging portions (54, 52) engaging the two magnetic driving ends (39) respectively, so that the armature assembly (10) and the coil assembly (9) form a closed magnetic circuit.
5. A magnetic circuit portion according to claim 1, characterized in that both of the magnetic drive ends (39) extend in the X-axis direction to limit movement of the armature assembly (10) from the first position to the second position and/or from the second position to the first position.
6. A magnetic circuit part as claimed in claim 1, characterized in that the coil assembly (9) comprises a coil winding (32), an iron core (33) and two yokes (34), the iron core (33) being arranged in the coil, the two yokes (34) being fixedly connected to the two ends of the iron core (33) respectively, the two magnetic drive ends (39) being formed at the ends of the two yokes (34) remote from the iron core (33) respectively.
7. A magnetic circuit portion according to claim 6, characterized in that the axis of the coil winding (9) extends in the X-axis direction.
8. A magnetic circuit portion according to claim 1, wherein the two magnetic stages of the permanent magnet (42) are arranged in the Y-axis direction.
9. A magnetic circuit portion according to claim 1, wherein both armatures (43) are provided with a narrower section (56) and a wider section (57), the narrower section (56) having a smaller width in the Z-axis direction than the wider section (57), the mutually intersecting portions (55) being located in the narrower section (56).
10. A magnetic circuit portion according to claim 9, characterized in that the location where the armature (43) is fastened to the permanent magnet element (42) is located in the wider section (57).
11. A magnetic circuit portion according to claim 9, characterized in that each armature (43) is provided with two said wider sections (57), the two wider sections (57) being located on either side of the narrower section (56) in the X-axis direction.
12. A magnetic circuit portion according to claim 11, characterized in that both armatures (43) are provided with a thicker portion (119) and a thinner portion (120), the thicker portion (119) having a thickness greater than the thickness of the thinner portion (120), the thinner section (56) being located at the thicker portion (119), the thickness being the length of the projection of the magnetically conductive cross-section of the armature (43) on the first projection plane (U).
13. A magnetic circuit portion according to claim 12, characterized in that the wider sections (57) of the armature (43) on both sides of the narrower section (56) are partly located in the thicker section (119).
14. A magnetic circuit portion according to claim 12, wherein both armatures (43) comprise a base sheet (121) and a thickening sheet (122), the thickening sheet (122) being fixedly connected to the base sheet (121) and being attached to the base sheet (121) in a thickness direction to form the thicker portion (119).
15. A magnetic circuit portion according to any one of claims 1 to 14, wherein the number of permanent magnet pieces (42) is at least two and is located on both sides of the portion (55) crossing each other in the X-axis direction, and each armature (43) is fixedly connected to the pole of the same polarity of each permanent magnet piece (42).
16. A magnetic circuit portion according to claim 15, wherein the projection of the armature assembly (10) onto the first projection plane (U) is mirror symmetrical with respect to a plane of symmetry (W) perpendicular to the X-axis direction.
17. A magnetic latching relay, comprising:
A magnetic circuit portion (3) as claimed in any one of claims 1 to 16;
a contact portion (5) comprising at least one movable contact group (13) and static contact groups (14) which are the same in number and correspond to the movable contact groups (13), the movable contact groups (13) being adapted to abut against or be away from the static contact groups (14) to turn on or off an external circuit;
The pushing part (4) is driven by the armature assembly (10) and drives the movable contact piece group (13) to abut against or be far away from the static contact piece group (14); and
And a housing member (2) for housing the magnetic circuit portion (3), the contact portion (5), and the pushing portion (4).
18. A magnetic latching relay according to claim 17, wherein:
The movable contact group (13) comprises at least one movable contact (72), the movable contact (72) is provided with an overcurrent bridge (73), a first movable contact (75) and a second movable contact (76), and the first movable contact (75) and the second movable contact (76) are suitable for being in electrical communication through the overcurrent bridge (73);
The static contact piece group (14) comprises two static contact pieces (89), and the two static contact pieces (89) are a first static contact piece (92) and a second static contact piece (93) respectively;
Each first movable contact (75) in the movable contact group (13) is suitable for being abutted against or separated from a first static contact (92) in a corresponding static contact group (14) along the Y-axis direction, and each second movable contact (76) in the movable contact group (13) is suitable for being abutted against or separated from a second static contact (93) in the corresponding static contact group (14) along the Y-axis direction.
19. A magnetic latching relay according to claim 18, characterized in that the number of moving contact groups (13) is at least two.
20. A magnetic latching relay according to claim 19, characterized in that the number of moving contact groups (13) is three.
21. A magnetic latching relay according to claim 19, wherein each of the movable contact groups (13) is arranged in the X-axis direction.
22. A magnetic latching relay according to claim 21, wherein the movable contact group (13) comprises at least two movable contacts (72).
23. A magnetic latching relay according to claim 22, wherein each movable contact (72) of the movable contact group (13) is arranged along the Z-axis direction, and the first movable contact (75) and the second movable contact (76) of the movable contact (72) are arranged along the X-axis direction.
24. A magnetic latching relay according to any of claims 19 to 23, wherein the push part (4) comprises a push card (58), the push card (58) being fixedly connected to the armature assembly (10), each of the movable contact groups (13) being mounted to the push card (58) and carried by the push card (58).
25. A magnetic latching relay as claimed in claim 24, wherein the push-on card (58) is insert molded integrally with the armature assembly (10).
26. A magnetic latching relay according to claim 25, wherein the push card (58) is provided with a receiving portion (64) and a connecting portion (65), the receiving portion (64) being configured to receive the armature assembly (10), the connecting portion (65) being configured to connect and carry each of the movable contact groups (13), the connecting portion (65) extending in the X-axis direction.
27. A magnetic latching relay according to claim 24, wherein the receiving member (2) is provided with a first guide portion (26), the push card (58) is provided with a second guide portion (67), and the first guide portion (26) and the second guide portion (67) are slidably engaged in the Y-axis direction.
28. A magnetic latching relay according to claim 27, wherein the second guide (67) is located at a central portion of the push card (58) in the X-axis direction.
29. A magnetic latching relay according to claim 24, further comprising a guide (6), said guide (6) extending in the Y-axis direction; one of the push card (58) and the accommodating piece (2) is fixedly connected with the guide piece (6), and the other one is in sliding fit with the guide piece (6) along the Y-axis direction.
30. A magnetic latching relay according to claim 29, wherein the number of the guide members (6) is two or more, and each of the guide members (6) is arranged on both sides of the push card (58) in the X-axis direction.
31. A magnetic latching relay according to claim 30, wherein the receiving member (2) is provided with two mating parts (27), each mating part (27) being adapted to be fixedly or slidably coupled to a corresponding guide member (6), each mating part (27) comprising two mating parts (28) arranged in the Y-axis direction, the position of the guide member (6) being slidably or fixedly coupled to the push card (58) being located between the two mating parts (28) of the corresponding mating part (27) in the Y-axis direction.
32. A magnetic latching relay according to claim 24, wherein the pushing portion (4) further comprises elastic supporting groups (60), the number of the elastic supporting groups (60) is the same as and corresponds to the number of the movable contact groups (13), the elastic supporting groups (60) are arranged on the pushing card (58), when the movable contact groups (13) are abutted against the static contact groups (14), the elastic supporting groups (60) store energy, and when the movable contact groups (13) are far away from the static contact groups (14), the elastic supporting groups (60) release energy.
33. A magnetic latching relay according to claim 32, wherein the elastic support group (60) comprises an elastic support (80), the elastic support (80) comprises a support body (81) and an elastic supporting portion (82) which are integrally connected with each other, the support body (81) is fixed relative to the push card (58), the elastic supporting portion (82) is the same as and corresponds to the number of movable contacts (72) in the corresponding movable contact group (13), and each movable contact (72) in the movable contact group (13) is mounted on the corresponding elastic supporting portion (82).
34. A magnetic latching relay according to claim 33, wherein said resilient support (82) comprises two resilient arms (84), both of said resilient arms (84) being fixedly connected to said bridge (73).
35. A magnetic latching relay according to claim 34, wherein the two elastic arms (84) are fixedly connected to the overcurrent bridge (73) at positions on the back surfaces of the first movable contact (75) and the second movable contact (76), respectively.
36. A magnetic latching relay according to claim 33, wherein the pushing portion (4) further comprises a stopper (61), the stopper (61) being the same in number as and corresponding to the movable contact group (13), the stopper (61) being fixed relative to the push card (58) and abutting each movable contact (72) in the Y-axis direction to limit the distance between each movable contact (72) and the stationary contact group (14) when the corresponding movable contact group (13) is away from the stationary contact group (14).
37. A magnetic latching relay according to claim 36, wherein the push card (58) is provided with a limiting portion (70), the holder body is provided with an adapting portion (83), the limiting portion (70) is slidably engaged with the adapting portion (83) in the Y-axis direction and limits the movement of the holder body (81) perpendicular to the Y-axis direction, and the limiting member (61) causes the holder body (81) to be limited in the Y-axis direction by abutting against each movable contact (72).
38. A magnetic latching relay according to claim 24, further comprising an elastic member (7), wherein the elastic member (7) is mounted on the accommodating member (2) and is adapted to elastically abut against the push card (58), and wherein the elastic member (7) stores energy when the movable contact group (13) moves in a direction away from the stationary contact group (14) and releases energy when the movable contact group (13) moves in a direction close to the stationary contact group (14).
39. A magnetic latching relay according to claim 18, characterized in that the contact part (5) further comprises anti-short-circuit units (12), the anti-short-circuit units (12) being the same and corresponding in number to the movable contact group (13); the short-circuit-resistant unit (12) comprises a first magnetizer group (15) fixed relative to the movable contact group (13) and a second magnetizer group (16) fixed relative to the static contact group (14); the first magnetizer group (15) and the second magnetizer group (16) form a magnetic loop when the movable contact group (13) passes current so that the first magnetizer group (15) and the second magnetizer group (16) attract each other along the Y-axis direction.
40. A magnetic latching relay according to claim 39, wherein:
the first magnetizer group (15) is at least partially positioned on the back surface of the overcurrent bridge (73) along the Y-axis direction;
In the static contact element group (14), at least one static contact element (89) is provided with a reverse overcurrent part (103), and when the current passes through the movable contact element group (13), the current direction of the reverse overcurrent part (103) is opposite to the current direction of the overcurrent bridge (73) along the X-axis direction; the second magnetizer group (16) is at least partially positioned between the overcurrent bridge (73) and the reverse overcurrent part (103) along the Y-axis direction.
41. A magnetic latching relay according to claim 39, wherein the first stationary contact (92) is provided with a first stationary contact (94) adapted for abutting the first movable contact (75), the second stationary contact (93) is provided with a second stationary contact (100) adapted for abutting the second movable contact (76), and the second magnetic conductor set (16) is located between the first stationary contact (94) and the second stationary contact (100) in the X-axis direction and is covered by an insulator (107).
42. A magnetic latching relay according to claim 41, wherein the insulator (107) is formed in the housing (2).
43. A magnetic latching relay according to claim 19, further comprising a barrier (30); the accommodating piece (2) is provided with contact cavities (29) which are the same as the movable contact piece groups (13) in number and correspond to the movable contact piece groups (13), and the contact cavities (29) are used for enabling the corresponding movable contact piece groups (13) to collide with or be far away from the static contact piece groups (14) in the accommodating piece; the baffle part (30) is fixed relative to the accommodating piece (2) or the pushing card (58) and extends along the Y-axis direction; the barrier (30) is made of insulating material and is located between adjacent contact cavities (29).
44. A magnetic latching relay according to claim 43, wherein the barrier (30) blocks adjacent contact chambers (29) when the movable contact group (13) abuts against the stationary contact group (14).
45. A magnetic latching relay according to claim 19, wherein each contact chamber (29) is provided with a barrier (30) on both sides in the X-axis direction.
46. A magnetic latching relay according to claim 45, wherein the barrier (30) is formed on the receptacle (2) or the pusher card (58).
47. A magnetic latching relay according to claim 43, wherein the barrier (30) is made of a high temperature resistant insulating material and is fixedly connected to the receiving member (2) or the push card (58).
48. A magnetic latching relay according to claim 47, wherein said barrier (30) is of ceramic material.
49. An electricity meter comprising a magnetically held relay as claimed in any one of claims 17 to 48.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410315799.7A CN117976468A (en) | 2024-03-19 | 2024-03-19 | Magnetic circuit part, magnetic latching relay and ammeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410315799.7A CN117976468A (en) | 2024-03-19 | 2024-03-19 | Magnetic circuit part, magnetic latching relay and ammeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117976468A true CN117976468A (en) | 2024-05-03 |
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ID=90856469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202410315799.7A Pending CN117976468A (en) | 2024-03-19 | 2024-03-19 | Magnetic circuit part, magnetic latching relay and ammeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117976468A (en) |
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2024
- 2024-03-19 CN CN202410315799.7A patent/CN117976468A/en active Pending
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