Linear motion electromagnetic mechanism and electromagnetic relay

Abstract

The utility model discloses a linear motion electromagnetic mechanism and an electromagnetic relay, the electromagnetic mechanism comprises a yoke iron part, a first bipolar charging permanent magnet, a second bipolar charging permanent magnet and a coil driving part, the yoke iron part forms a frame-shaped part, and the first bipolar charging permanent magnet and the second bipolar charging permanent magnet are respectively arranged on two opposite inner walls of the frame-shaped part. Two opposite parallel magnetic fields are formed; the coil driving part is at least partially arranged in the frame-shaped part and can linearly move back and forth in the distribution direction of the two parallel magnetic fields; a guide structure made of a non-plastic material is arranged between the coil driving part and the yoke part, and the guide structure guides the linear motion of the coil driving part. According to the utility model, the coil driving part can stably move in the magnetic circuit in a set direction, and meanwhile, the abrasion caused by collision between a plastic part of the coil driving part and metal is avoided, so that the magnetic circuit structure is more stable, the problem of scrap hanging caused by friction is reduced, the assembly precision is improved, and the risk of product failure is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of relay technology, and in particular to an electromagnetic mechanism for linear motion and an electromagnetic relay. Background Technology

[0002] A linear motion electromagnetic relay is a control element that uses electromagnetic force to drive a coil drive component to move linearly, thereby achieving contact opening, closing, or switching. It solves the problem of the large thickness of traditional snap-action relays. One existing linear motion electromagnetic relay has an electromagnetic mechanism including a yoke component and a coil drive component. The yoke component forms a frame-like portion, and the coil drive component includes a coil, a plastic component, two armatures, and an iron core assembled together. A first and a second bipolar permanent magnet are respectively disposed on two opposing inner walls of the frame-like portion, forming two parallel magnetic fields in opposite directions. The two semi-circular portions of the coil in the coil drive component are subjected to Ampere forces in the same direction, causing the coil to be bidirectionally energized, enabling the entire coil drive component to move bidirectionally, thus achieving the switching operation of the relay. The aforementioned coil drive component contacts and engages with the yoke component via a plastic part. During high-speed operation of the coil drive component, the difference in strength between the plastic and metal parts makes the plastic part prone to mechanical wear and plastic debris during impact with the yoke component. This causes the magnetic circuit fit accuracy to deteriorate with increasing usage, resulting in increased clearance or wear between magnetic circuit components. This leads to increased magnetic reluctance, decreased magnetic flux, and consequently, a decrease in magnetic circuit holding force, causing unstable relay operation, or even malfunctions or failure to operate. The generated plastic debris may accumulate near the relay contacts, hindering normal contact and affecting the reliability of electrical contact. Plastic debris may also accumulate in the air gap of the magnetic circuit, increasing the magnetic reluctance of the air gap, affecting the normal distribution of magnetic flux, and thus affecting the magnetic attraction and holding force of the relay. The accumulation of plastic debris may also cause jamming or obstruction of movement of internal mechanical components of the relay. Utility Model Content

[0003] This utility model addresses the technical problems existing in the prior art by providing a linear motion electromagnetic mechanism and electromagnetic relay. Through structural improvements, it greatly improves the motion accuracy of the coil drive component and significantly reduces the generation of plastic debris.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a linear motion electromagnetic mechanism, including a yoke component, a first bipolar permanent magnet, a second bipolar permanent magnet, and a coil driving component. The yoke component has a frame-like portion. The first bipolar permanent magnet and the second bipolar permanent magnet are respectively disposed on two opposite inner walls of the frame-like portion, forming two parallel magnetic fields in opposite directions. The coil driving component is at least disposed within the frame-like portion and can move back and forth linearly in the distribution direction of the two parallel magnetic fields. A non-plastic guide structure is provided between the coil driving component and the yoke component, which guides the linear motion of the coil driving component.

[0005] In a preferred embodiment, the guiding structure includes a plurality of guide members and guide recesses respectively provided for each guide member. The guide members and / or guide recesses are made of non-magnetic material and are elongated, extending along the movement direction of the coil driving component. One of the coil driving component and the yoke component is provided with the guide member, and the other of the coil driving component and the yoke component is provided with the guide recess. Each guide member is adapted to slide together with its corresponding guide recess along the movement direction of the coil driving component.

[0006] In a preferred embodiment, the guide member is fixed to the yoke component, and the guide recess includes a guide groove provided on the armature and / or core of the coil drive component.

[0007] In a preferred embodiment, the guide is a guide rod, and the two ends of the guide rod are respectively fixed to the two sides of the frame portion in the direction of movement of the coil drive component.

[0008] In a preferred embodiment, the guide recess includes guide grooves provided on each armature of the coil driving component, and the plastic parts and iron cores of the coil driving component are respectively provided with relief grooves corresponding to the guide.

[0009] In a preferred embodiment, the guide member is fixed to the coil driving component; both ends of the guide member protrude beyond the two sides of the coil driving component in the direction of movement, and the guide recess includes guide holes respectively provided on the yoke component corresponding to the two ends of the guide member, and the two ends of the guide member are respectively movably inserted through the corresponding guide holes, or the guide recess includes guide grooves respectively provided on the inner wall of the yoke component corresponding to each guide member.

[0010] In a preferred embodiment, the guide is a guide rod, which is integrally injection molded with the coil drive component, or the guide rod is inserted and fixed to the coil drive component.

[0011] In a preferred embodiment, the inner wall of the frame-shaped portion is provided with a plurality of first positioning protrusions for positioning the first bipolar permanent magnet and a plurality of second positioning protrusions for positioning the second bipolar permanent magnet. The plurality of first positioning protrusions are distributed at least on the two opposite sides of the first bipolar permanent magnet, and the plurality of second positioning protrusions are distributed at least on the two opposite sides of the second bipolar permanent magnet.

[0012] In a preferred embodiment, the inner wall of the frame-shaped portion is provided with a first error-proof protrusion and a second error-proof protrusion. The first error-proof protrusion cooperates with a first error-proof notch provided on the first bipolar permanent magnet, and the second error-proof protrusion cooperates with a second error-proof notch provided on the second bipolar permanent magnet.

[0013] In a preferred embodiment, the yoke component includes two first yokes and two second yokes. The two first yokes correspond to the two opposite sides of the frame portion in the direction of motion of the coil drive component and are symmetrical to each other. The two second yokes correspond to the remaining two sides of the frame portion and are symmetrical to each other. Adjacent first yokes and second yokes are interlocked together.

[0014] This utility model also provides an electromagnetic relay, including the linear motion electromagnetic mechanism as described above.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. This utility model uses a non-plastic guide structure to guide the linear motion of the coil drive component, enabling the coil drive component to move stably in a predetermined direction in the magnetic circuit. At the same time, it avoids wear caused by collision between the plastic parts and metal of the coil drive component, making the magnetic circuit structure more stable, reducing friction and chip problems, improving assembly accuracy, and effectively reducing the risk of product failure.

[0017] 2. The guide structure, as a preferred design, comprises multiple guide elements and corresponding guide recesses for each guide element. The guide elements and guide recesses are fitted and slidably connected together, reducing the number of parts, simplifying the manufacturing process, and making the linear motion of the coil drive component more stable and reliable. In particular, the guide elements and / or guide recesses are made of non-magnetic material, which avoids altering the magnetic circuit path, affecting the uniformity of the magnetic field, changing the distribution of electromagnetic force, and affecting mechanical properties.

[0018] 3. The first and second positioning protrusions facilitate the positioning of the first and second bipolar permanent magnets on the yoke component, preventing them from failing to be fixed in their designated positions due to magnetic interaction. The first and second error-proof protrusions and the first and second error-proof notches help prevent the first and second bipolar permanent magnets from being installed in the wrong polarity direction during assembly.

[0019] 4. The yoke component includes the two first yoke pieces and the two second yoke pieces. The parallelism between the yoke surfaces is effectively guaranteed by the interlocking method, which is beneficial to maintaining the stability of the force between the armature and the yoke.

[0020] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the electromagnetic mechanism and electromagnetic relay of linear motion of the present invention are not limited to the embodiments. Attached Figure Description

[0021] Figure 1 This is an exploded view of the electromagnetic mechanism of a utility model according to an embodiment;

[0022] Figure 2 yes Figure 1 A partial schematic diagram (the iron core is in the pulled-out state);

[0023] Figure 3 This is a three-dimensional structural schematic diagram of the electromagnetic mechanism of this utility model, as shown in the embodiment.

[0024] Figure 4 This is the main view of the electromagnetic mechanism of this utility model, as described in the embodiment. Figure 1 ;

[0025] Figure 5 This is the main view of the electromagnetic mechanism of this utility model, as described in the embodiment. Figure 2 (Reflecting on a local aspect);

[0026] Figure 6 This is a right view of the electromagnetic mechanism of a utility model according to an embodiment;

[0027] Figure 7 This is a top view of the electromagnetic mechanism of a utility model according to an embodiment;

[0028] Figure 8 This is a three-dimensional structural schematic diagram of the electromagnetic mechanism of this utility model in Embodiment 2;

[0029] Figure 9 This is a front view of the electromagnetic mechanism of this utility model in Embodiment 2;

[0030] Figure 10 This is a right view of the electromagnetic mechanism of this utility model in Embodiment 2;

[0031] Figure 11 This is a top view of the electromagnetic mechanism of this utility model in Embodiment 2;

[0032] In the diagram, 1. Yoke component; 11. First yoke; 111. Insertion hole; 112. Guide hole; 12. Second yoke; 121. First positioning protrusion; 122. Second positioning protrusion; 123. First error-proofing protrusion; 124. Second error-proofing protrusion; 2. Coil drive component; 21. Plastic part; 211. Relief groove; 22. Armature; 221. Guide groove; 23. Iron core; 231. Relief groove; 3. First bipolar permanent magnet; 31. Error-proofing notch; 4. Second bipolar permanent magnet; 5. Guide rod. Detailed Implementation

[0033] In this utility model, the terms "first," "second," etc., are used only to distinguish similar objects, not to describe a specific order or sequence, nor should they be construed as indicating or implying relative importance. The use of terms such as "upper," "lower," "inner," and "outer" to indicate orientation or positional relationships is based on the orientation or positional relationships shown in the accompanying drawings, and is only for the convenience of describing this utility model, not to indicate or imply that the device referred to must have a specific orientation, or be constructed and operated in a specific orientation; therefore, it should not be construed as a limitation on the scope of protection of this utility model. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0034] Example 1

[0035] Please see Figures 1-7As shown, this utility model discloses a linear motion electromagnetic mechanism, including a yoke component 1, a first bipolar permanent magnet 3, a second bipolar permanent magnet 4, and a coil drive component 2. The yoke component 1 has a frame-like portion. The first bipolar permanent magnet 3 and the second bipolar permanent magnet 4 are respectively disposed on two opposing inner walls of the frame-like portion, forming two parallel magnetic fields in opposite directions. The coil drive component 2 is at least partially disposed within the frame-like portion and can move linearly back and forth in the distribution direction of the two parallel magnetic fields. Specifically, the coil drive component 2 includes a plastic part 21, two armatures 22, an iron core 23, and a coil (not shown in the figure). These parts are assembled together by integral insert injection molding. The two armatures 22 are located within the frame-like portion and are fitted at both ends of the coil drive component 2 in its direction of movement, forming a holding force to limit the position of the coil drive component 2 when the entire coil drive component 2 is in the operating or returning position. This utility model also includes a non-plastic guide structure, which is located between the coil drive component 2 and the yoke component 1 and guides the linear motion of the coil drive component 2, making the linear motion of the coil drive component 2 more stable and reliable, and greatly reducing the plastic debris generated by the wear of the plastic parts 21 on the coil drive component 2.

[0036] The guiding structure specifically includes multiple guide members and corresponding guide recesses for each guide member. The guide members and / or guide recesses are made of non-magnetic material and are elongated, extending along the movement direction of the coil drive component 2. One of the coil drive component 2 and the yoke component 1 has a guide member, and the other has a guide recess. Each guide member is adapted to slide with its corresponding guide recess along the movement direction of the coil drive component 2. The guide members and / or guide recesses can be made of hard brass or stainless steel, or other non-magnetic, non-plastic materials (such as ceramics). The guide members can be guide rods or guide protrusions (such as guide ribs), and the guide recesses include one of the following: guide holes, guide grooves, guide notches, and elongated guide rail grooves.

[0037] Preferably, each guide member is fixed to the yoke component 1, and the guide member and the yoke component 1 can be fixedly connected by one or more of the following methods: welding, insertion, bonding, screw or bolt connection, riveting, snap-fit, or clamping. The guide recess includes a guide groove 221 provided on the armature 22 and / or the iron core 23 of the coil drive component 2. The guide member is preferably a guide rod 5, which is made of non-magnetic material, and its cross-section can be any feasible shape such as circular, square, trapezoidal, or triangular. This embodiment uses a square shape as an example, but it is not limited to this. The cross-sectional shape of the guide groove 221 is adapted to the cross-sectional shape of the guide rod 5. The two ends of the guide rod 5 are respectively fixed to the yoke component 1. Specifically, the two ends of the guide rod 5 are respectively fixed to the two sides of the frame-shaped part in the direction of movement of the coil drive component 2: the two sides of the frame-shaped part in the direction of movement of the coil drive component 2 are respectively provided with insertion holes 111 for inserting the ends of the guide rod 5, and the guide rod 5 and the yoke component 1 can be fixed by laser welding or other fixing methods. In other embodiments, the guide is a guide rib provided on the inner side of the yoke component.

[0038] As a preferred embodiment, the guide recess includes guide grooves 221 provided on each armature 22 of the coil drive component 2, and the plastic part 21 and the iron core 23 on the coil drive component 2 are respectively provided with clearance grooves 211 and 231 corresponding to the guide member (i.e., guide rod 5). In this way, the present invention can not only set the guide structure without increasing the size of the entire electromagnetic mechanism, but also avoid the plastic part 21 and the iron core 23 from contacting the guide member (in this embodiment, the guide member is the guide rod 5), thereby avoiding friction between the guide member and the plastic part 21, reducing over-constraint, and making the cooperation between the two armatures 22 and the guide member more stable.

[0039] In this embodiment, there are four guide rods (i.e., guide rods 5), which are distributed at the four corners. Specifically, the four guide rods 5 are arranged in pairs, and the two pairs of guide rods 5 are distributed on the two opposite sides of the coil drive component 2. However, the number and distribution of the guide rods 5 are not limited to this.

[0040] The inner wall of the frame-shaped portion is provided with a plurality of first positioning protrusions 121 for positioning the first bipolar permanent magnet 3 and a plurality of second positioning protrusions 122 for positioning the second bipolar permanent magnet 4. The plurality of first positioning protrusions 121 are distributed at least on the opposite sides of the first bipolar permanent magnet 3, and the plurality of second positioning protrusions 122 are distributed at least on the opposite sides of the second bipolar permanent magnet 4. The first bipolar permanent magnet 3 and the second bipolar permanent magnet 4 each include two permanent magnets with opposite magnetic conduction directions. The two permanent magnets are connected or spaced apart on the same inner wall of the frame-shaped portion, preferably spaced apart, to facilitate increasing the holding force of the coil drive component at both ends in its direction of movement.

[0041] The inner wall of the frame-shaped part is also provided with a first error-proof protrusion 123 and a second error-proof protrusion 124. The first error-proof protrusion 123 cooperates with the first error-proof notch 31 provided on the first bipolar permanent magnet 3, and the second error-proof protrusion 124 cooperates with the second error-proof notch (not shown in the figure) provided on the second bipolar permanent magnet 4. In this way, the polarity direction of the first bipolar permanent magnet 3 / second bipolar permanent magnet 4 can be prevented from being installed incorrectly during assembly. The first error-proof protrusion 123 and the second error-proof protrusion 124 are preferably circular protrusions, and the first error-proof notch 31 and the second error-proof notch are semi-circular notches.

[0042] The first positioning protrusion 121, the second positioning protrusion 122, the first anti-misalignment protrusion 123, and the second anti-misalignment protrusion 124 are formed by stamping the corresponding parts of the frame-shaped part from the outside to the inside, but are not limited thereto.

[0043] In this embodiment, the yoke component 1 includes two first yokes 11 and two second yokes 12. The two first yokes 11 correspond to the two opposite sides of the frame-shaped part in the direction of movement of the coil driving component 2 and are symmetrical to each other. The two second yokes 12 correspond to the other two sides of the frame-shaped part and are symmetrical to each other. Adjacent first yokes 11 and second yokes 12 are connected together by interlocking. The interlocking method effectively ensures the parallelism between the yoke surfaces, which is beneficial to maintaining the force stability between the armature 22 and the yoke component 1. The first yokes 11 and second yokes 12 can be stably fixed together by welding or riveting. The two first yokes 11 are respectively provided with the insertion holes 111 at both ends of the guide rod 5. The first bipolar permanent magnet 3 and the second bipolar permanent magnet 4 are respectively provided on the opposite inner surfaces of the two second yokes 12. Therefore, the second yokes 12 are provided with the first positioning protrusion 121 / second positioning protrusion 122, the first anti-misalignment protrusion 123 / second anti-misalignment protrusion 124.

[0044] This invention discloses a linear motion electromagnetic mechanism that uses a non-magnetic metal guide (in this embodiment, the guide is a guide rod 5) as the sliding track of the coil drive component 2. This allows the energized coil to be driven by the Ampere force in a bipolar magnetic field, enabling the coil drive component 2 to move stably in a predetermined direction within the frame. This significantly improves the motion accuracy of the coil drive component 2, while also preventing wear on the plastic part 21 of the coil drive component 2, greatly reducing the generation of plastic debris, making the magnetic circuit structure more stable, reducing friction and debris problems, and effectively reducing the risk of product failure.

[0045] Example 2

[0046] Please see Figures 8-11As shown, the electromagnetic mechanism for linear motion of this utility model differs from the first embodiment described above in that: the guide member is fixed to the coil drive component 2, and the guide member and the coil drive component 2 can be fixedly connected by one or more of the following methods: welding, insertion, bonding, screw or bolt connection, riveting, insert injection molding, snap-fit, or clamping. The two ends of the guide member protrude beyond the two sides of the coil drive component 2 in the direction of motion; the guide recess includes guide holes 112 respectively provided on the yoke component 1 corresponding to the two ends of the guide member, and the two ends of the guide member movably pass through the corresponding guide holes 112. In other embodiments, the guide recess includes guide grooves respectively provided on the inner wall of the yoke component corresponding to each guide member; in this case, the two ends of the guide member may not protrude beyond the two sides of the coil drive component in the direction of motion.

[0047] In this embodiment, the guide member is also a guide rod 5, but it is not limited to this. The guide rod 5 is integrally injection molded with the coil drive component 2, or the guide rod 5 is inserted and fixed to the coil drive component 2. There are two guide rods 5, which are distributed vertically, but the number and distribution of the guide rods 5 are not limited to this. The two first yokes 11 of the yoke component 1 are respectively provided with the guide holes 112 corresponding to the guide rods 5. In this embodiment, the cross-section of the guide rod 5 is circular, but it is not limited to this.

[0048] This utility model discloses a linear motion electromagnetic mechanism. When the energized coil is subjected to Ampere force in a bipolar magnetic field, driving the coil driving component 2 to move linearly in the frame-shaped part, each guide rod 5 also moves accordingly and slides with the corresponding guide hole 112 to guide the linear motion of the entire coil driving component 2, so that the coil driving component 2 can achieve stable motion and avoid wear of the plastic part 21.

[0049] This utility model discloses an electromagnetic relay, including the linear motion electromagnetic mechanism described in any of the above embodiments. The utility model also includes a base, a moving contact assembly, and a stationary contact assembly. The electromagnetic mechanism and the stationary contact assembly are mounted on the base. The moving contact assembly is linked to the coil drive component 2 of the electromagnetic mechanism, and is driven by the coil drive component 2 to perform linear reciprocating motion, thereby contacting or separating from the stationary contact assembly.

[0050] The present invention relates to an electromagnetic mechanism and an electromagnetic relay for linear motion. The parts not described herein are the same as or can be implemented using existing technologies.

[0051] The above embodiments are only used to further illustrate a linear motion electromagnetic mechanism and electromagnetic relay of the present invention. However, the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention shall fall within the protection scope of the technical solution of the present invention.

Claims

1. An electromagnetic mechanism for linear motion, comprising a yoke component, a first bipolar permanent magnet, a second bipolar permanent magnet, and a coil driving component; the yoke component has a frame-like portion; the first and second bipolar permanent magnets are respectively disposed on two opposing inner walls of the frame-like portion, forming two parallel magnetic fields in opposite directions; the coil driving component is at least partially disposed within the frame-like portion and can move linearly back and forth in the distribution direction of the two parallel magnetic fields; characterized in that: A non-plastic guide structure is provided between the coil drive component and the yoke component, which guides the linear motion of the coil drive component.

2. The electromagnetic mechanism for linear motion according to claim 1, characterized in that: The guiding structure includes multiple guide members and corresponding guide recesses for each guide member. The guide members and / or guide recesses are made of non-magnetic material and are elongated, extending along the movement direction of the coil driving component. One of the coil driving component and the yoke component is provided with the guide member, and the other of the coil driving component and the yoke component is provided with the guide recess. Each guide member is adapted to slide together with its corresponding guide recess along the movement direction of the coil driving component.

3. The electromagnetic mechanism for linear motion according to claim 2, characterized in that: The guide member is fixed to the yoke component, and the guide recess includes a guide groove provided on the armature and / or core of the coil drive component.

4. The electromagnetic mechanism for linear motion according to claim 3, characterized in that: The guide is a guide rod, and its two ends are respectively fixed to the two sides of the frame-shaped part in the direction of movement of the coil drive component.

5. The electromagnetic mechanism for linear motion according to claim 3 or 4, characterized in that: The guide recess includes guide grooves provided on each armature of the coil drive component, and the plastic parts and iron cores of the coil drive component are respectively provided with clearance grooves corresponding to the guide components.

6. The electromagnetic mechanism for linear motion according to claim 2, characterized in that: The guide member is fixed to the coil driving component; both ends of the guide member protrude beyond the two sides of the coil driving component in the direction of movement. The guide recess includes guide holes respectively provided on the yoke component corresponding to the two ends of the guide member. The two ends of the guide member are respectively movably inserted through the corresponding guide holes. Alternatively, the guide recess includes guide grooves respectively provided on the inner wall of the yoke component corresponding to each guide member.

7. The electromagnetic mechanism for linear motion according to claim 6, characterized in that: The guide component is a guide rod, which is integrally injection molded with the coil drive component, or the guide rod is inserted and fixed to the coil drive component.

8. The electromagnetic mechanism for linear motion according to claim 1, characterized in that: The inner wall of the frame-shaped part is provided with a plurality of first positioning protrusions for positioning the first bipolar permanent magnet and a plurality of second positioning protrusions for positioning the second bipolar permanent magnet. The plurality of first positioning protrusions are distributed at least on the two opposite sides of the first bipolar permanent magnet, and the plurality of second positioning protrusions are distributed at least on the two opposite sides of the second bipolar permanent magnet.

9. The electromagnetic mechanism for linear motion according to claim 1, characterized in that: The inner wall of the frame-shaped part is provided with a first error-proof protrusion and a second error-proof protrusion. The first error-proof protrusion cooperates with the first error-proof notch provided on the first bipolar permanent magnet, and the second error-proof protrusion cooperates with the second error-proof notch provided on the second bipolar permanent magnet.

10. The electromagnetic mechanism for linear motion according to claim 1, characterized in that: The yoke component includes two first yokes and two second yokes. The two first yokes correspond to the two opposite sides of the frame portion in the direction of motion of the coil drive component and are symmetrical to each other. The two second yokes correspond to the other two sides of the frame portion and are symmetrical to each other. Adjacent first yokes and second yokes are interlocked together.

11. An electromagnetic relay, characterized in that: Includes an electromagnetic mechanism for linear motion as described in any one of claims 1-10.

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