Electromagnetic relay iron core device

Abstract

The electromagnetic relay iron core device comprises a shell, a coil, an armature, a permanent magnet, a magnet yoke and a spring, the coil, the armature, the permanent magnet, the magnet yoke and the spring are installed in the shell, the permanent magnet and the magnet yoke are arranged opposite to the armature, the side, facing the armature, of the magnet yoke is provided with an attraction face, the magnet yoke at least partially penetrates through a center hole of the coil, and the armature can move between a first position and a second position. When the armature is at the first position, the armature is sucked with the suction surface; the iron core device further comprises a fixing piece fixed in the shell, the fixing piece is provided with a first fixing hole and a second fixing hole, at least part of the permanent magnet is fixed in the first fixing hole in an interference mode, the magnet yoke comprises a magnet yoke installation portion, and at least part of the magnet yoke installation portion is fixed in the second fixing hole in an interference mode. According to the electromagnetic relay iron core device, the fixing piece is additionally arranged, the permanent magnet and the magnet yoke are firstly assembled on the fixing piece in an interference mode, then the permanent magnet and the magnet yoke are assembled in the shell together, assembling is simple and convenient, the permanent magnet and the magnet yoke are not prone to deformation, the structure is stable, and performance is reliable.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliances, specifically to an electromagnetic relay core device. Background Technology

[0002] Currently, the iron core, permanent magnet, and yoke of electromagnetic relays are usually fixed by riveting or welding. However, riveting or welding can cause stress and deformation, which affects the performance of the permanent magnet and yoke.

[0003] In addition, the magnetic circuit of the iron core device has two air gaps, and the magnetic yoke and armature have complex shapes, making it difficult to remove burrs generated during grinding. Utility Model Content

[0004] The purpose of this utility model is to overcome at least one defect of the prior art and provide an electromagnetic relay core device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An electromagnetic relay core assembly includes a housing, a coil, an armature, a permanent magnet, a yoke, and a spring, all installed within the housing. The permanent magnet and the yoke are respectively positioned opposite the armature. The yoke has an attractive surface on its side facing the armature, and at least part of the yoke passes through the center hole of the coil. The armature is movable between a first position and a second position. In the first position, the armature is attracted to the attractive surface. The core assembly also includes a fixing member fixed within the housing. The fixing member has a first fixing hole and a second fixing hole. At least part of the permanent magnet is interference-fitted into the first fixing hole. The yoke includes a yoke mounting portion, which is at least partially interference-fitted into the second fixing hole.

[0007] Optionally, the armature is oscillating, and the armature has an oscillating fulcrum; the core device further includes a limiting member, which includes a limiting part located on the path of the armature's oscillating fulcrum moving from the first position to the second position, and is used to block the oscillating fulcrum at the second position.

[0008] Optionally, the swing fulcrum is provided with a mating inclined surface on the side facing the limiting part. When the armature is in the first position, the mating inclined surface is set at an angle with the limiting part, and when the armature is in the second position, the mating inclined surface is in contact with the limiting part.

[0009] Optionally, the armature has a straight plate structure, with the swing fulcrum protruding from the middle side of the armature, one end of the armature is connected to a spring, and the other end of the armature is the armature drive end.

[0010] Optionally, the limiting member further includes a limiting member mounting part, which is at least partially interference-fixed in the second fixing hole. The limiting member mounting part is provided with a positioning hole, and the magnetic yoke mounting part is provided with a positioning boss that mates with the positioning hole.

[0011] Optionally, both the limiting component mounting part and the magnetic yoke mounting part are straight plate structures and are stacked. The width of the limiting component mounting part is greater than the width of the magnetic yoke mounting part. The second fixing hole is a square hole that is interference-fitted with the limiting component mounting part. The side wall of the second fixing hole is provided with two protruding ribs located on both sides of the width direction of the magnetic yoke mounting part.

[0012] Optionally, the fastener is snapped together with the housing, the fastener is provided with a first snap, and the housing is provided with a first latch that engages with the first snap.

[0013] Optionally, the magnetic yoke is a U-shaped structure with its opening facing the armature. One side of the magnetic yoke passes through the central hole of the coil, the magnetic yoke mounting part is the other side of the magnetic yoke, the attraction surface is the end face of both sides of the magnetic yoke, the end of the permanent magnet near the armature is fixed in the first fixing hole, and the other end of the permanent magnet is placed on the bottom edge of the magnetic yoke.

[0014] Optionally, it also includes a coil frame, on which the coil is fitted. The axis of the coil frame is parallel to the axis of the first fixing hole of the fixing member. The coil frame is snapped to the housing. The coil frame is provided with a second buckle. The housing is provided with a second snap that cooperates with the second buckle.

[0015] Optionally, the housing includes a base and a cover, the cover being fitted onto the base and snapped together with the base, the base having a third snap fastener, and the cover having a third latch that engages with the third snap fastener.

[0016] The electromagnetic relay core device of this utility model, by adding a fixing component, allows the permanent magnet and magnetic yoke to be first interference-fitted onto the fixing component, and then assembled together into the housing. The assembly is simple and convenient, and the permanent magnet and magnetic yoke are not easily deformed, resulting in a stable structure and reliable performance.

[0017] In addition, the armature adopts a swing structure without connection points, which simplifies the structure of the armature and facilitates its assembly and disassembly. Attached Figure Description

[0018] Figure 1 This is a perspective view of the iron core device of this utility model;

[0019] Figure 2 This is a cross-sectional view of the iron core device of this utility model;

[0020] Figure 3This is a schematic diagram of the core device of this utility model without the cover and top rod;

[0021] Figure 4 This is a structural schematic diagram of the fastener of this utility model;

[0022] Figure 5 This is a structural schematic diagram of the limiting component of this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the magnetic yoke of this utility model.

[0024] 1. Housing; 11. Base; 111. First latch; 112. Second latch; 113. Third buckle; 12. Cover; 121. Armature; 2. Swing fulcrum; 211. Mating bevel; 22. Hanging hole; 3. Permanent magnet; 4. Magnetic yoke; 41. Attracting surface; 42. Magnetic yoke mounting part; 43. Positioning boss; 5. Spring; 6. Fixing part; 61. First fixing part; 611. Second fixing part; 621. Second fixing hole; 622. Rib; 623. Notch; 63. First buckle; 64. Flange; 7. Limiting part; 71. Limiting part mounting part; 72. Positioning hole; 721. Connecting plate; 73. Hanging groove; 731. Coil frame; 8. Second buckle; 81. Top rod; 9. Detailed Implementation

[0025] The specific embodiments of the electromagnetic relay core device of this utility model are further described below with reference to the accompanying drawings. The electromagnetic relay core device of this utility model is not limited to the description of the following embodiments.

[0026] like Figures 1-4 As shown, the electromagnetic relay core device of this embodiment includes a housing 1, a coil (not shown) installed inside the housing 1, an armature 2, a permanent magnet 3, a yoke 4, and a spring 5. The permanent magnet 3 and the yoke 4 are respectively arranged opposite to the armature 2. The yoke 4 has a magnetic attraction surface 41 on the side facing the armature 2, and the yoke 4 passes through at least part of the central hole of the coil. The armature 2 can move between a first position and a second position. The armature 2 is held in the first position by the magnetic force of the permanent magnet 3 and is attracted to the magnetic attraction surface 41. When the electromagnetic force generated by the coil can counteract the magnetic force of the permanent magnet 3 (for example, when the relay has a leakage fault), the spring 5 drives the armature 2 to move from the first position to the second position, which can be used to trigger the corresponding protection action, such as triggering the tripping of the circuit breaker's operating mechanism. It should be noted that the permanent magnet 3 is usually made of magnetic steel; the core device is also usually provided with a push rod 9. The armature 2 is driven to engage with one end of the push rod 9, and the other end of the push rod 9 extends out of the housing 1 to drive other mechanisms of the relay.

[0027] Specifically, the core device further includes a fixing member 6 fixed within the housing 1. The fixing member 6 has a first fixing hole 611 and a second fixing hole 621. The permanent magnet 3 is at least partially interference-fitted into the first fixing hole 611, and the yoke 4 includes a yoke mounting portion 42, which is at least partially interference-fitted into the second fixing hole 621. In this embodiment, the electromagnetic relay core device, by adding the fixing member 6, allows the permanent magnet 3 and the yoke 4 to be first interference-fitted onto the fixing member 6, and then assembled together into the housing 1. This simplifies assembly, makes the permanent magnet 3 and the yoke 4 less prone to deformation, and ensures structural stability and reliable performance.

[0028] like Figure 3 , Figure 5 and Figure 6 As shown, the armature 2 in this embodiment has a limiting structure for movement. The armature 2 is oscillating and has an oscillation fulcrum 21. The core device also includes a limiting member 7, which includes a limiting part 71 located on the path of the oscillation fulcrum 21 of the armature 2 moving from the first position to the second position, and is used to block the oscillation fulcrum 21 at the second position. The armature 2 adopts an oscillating structure without connection points, which simplifies the structure of the armature 2 and facilitates the assembly and disassembly of the armature 2. The limiting part 71 is set at an angle to the suction surface 41, preferably 90°, that is, as shown in the figure. Figure 3 As shown, the limiting part 71 is arranged in the vertical direction, and the suction surface 41 is a horizontally arranged plane.

[0029] Furthermore, the swing fulcrum 21 of the armature 2 has a mating inclined surface 211 on the side facing the limiting part 71. When the armature 2 is in the first position, the mating inclined surface 211 is set at an angle to the limiting part 71 of the limiting member 7. When the armature 2 is in the second position, the mating inclined surface 211 is in contact with the limiting part 71. The structure of the armature 2 for mating with the limiting member 7 is simple and easy to construct, and it enables the limiting member 7 to stably and reliably limit the swing stroke of the armature 2.

[0030] like Figure 3 As shown, the armature 2 has a straight plate structure. The swing fulcrum 21 is provided on the middle side of the armature 2. One end of the armature 2 is connected to the spring 5. A hanging hole 22 is provided on one end of the armature 2. The other end of the armature 2 is the armature driving end, which is used to drive the push rod 9.

[0031] like Figure 2 , Figure 5 and Figure 6As shown in the figure, the mounting structure of the magnetic yoke 4 and the limiting member 7 in this embodiment includes a limiting member mounting part 72. The limiting member mounting part 72 is at least partially interference-fitted into the second fixing hole 621, that is, both the magnetic yoke 4 and the limiting member 7 are at least partially fixed in the second fixing hole 621. The limiting member mounting part 72 is provided with a positioning hole 721, and the magnetic yoke mounting part 42 is provided with a positioning boss 43 that mates with the positioning hole 721, so as to facilitate quick assembly of the magnetic yoke 4 and the limiting member 7. During assembly, the positioning boss 43 is first inserted into the positioning hole 721 to assemble the magnetic yoke 4 and the limiting member 7 together, and then the magnetic yoke mounting part 42 and the limiting member mounting part 72 are inserted into the second fixing hole 621 of the fixing member 6.

[0032] Specifically, both the limiting member mounting part 72 and the magnetic yoke mounting part 42 are straight plate structures and are stacked. The limiting member mounting part 72 is close to the magnetic yoke mounting part 42. The width of the limiting member mounting part 72 is greater than the width of the magnetic yoke mounting part 42. The second fixing hole 621 is a square hole that is interference-fitted with the limiting member mounting part 72. The side wall of the second fixing hole 621 is provided with two protruding ribs 622 located on both sides of the width direction of the magnetic yoke mounting part 42.

[0033] For example, the end of the limiting member mounting part 72 extending out of the second fixing hole 621 is provided with two limiting parts 71, and the other end of the limiting member mounting part 72 extending out of the second fixing hole 621 is provided with a connecting plate 73 in a direction away from the magnetic yoke mounting part 42, and the connecting plate 73 is provided with a hanging groove 731.

[0034] In this embodiment, the spring 5 is a tension spring, with one end hanging in the hanging hole 22 of the armature 2 and the other end hanging in the hanging groove 731. Of course, the spring 5 can also be a torsion spring, compression spring, or leaf spring, etc.

[0035] like Figure 3 and Figure 4 As shown, the fastener 6 is snap-fitted to the housing 1. The fastener 6 is provided with a first snap-fit ​​63, and the housing 1 is provided with a first latch 111 that mates with the first snap-fit ​​63. The fastener 6 is fixed by a snap-fit ​​connection, which facilitates assembly and disassembly.

[0036] For example, the fastener 6 in this embodiment is a one-piece molded structure made of plastic, including a first fixing part 61 and a second fixing part 62. The first fixing part 61 is a cylindrical structure, and the first fixing hole 611 penetrates the first fixing part 61 along the height direction of the first fixing part 61. The bottom of the first fixing part 61 extends to both sides to form flanges 64, and the flanges 64 extend downward to form a first buckle 63. The second fixing part 62 is a square column structure connected to the first fixing part 61 side by side. The second fixing hole 621 penetrates the second fixing part 62 along the height direction of the second fixing part 62. The side of the second fixing part 62 away from the first fixing part 61 is provided with an avoidance notch 623 for avoiding the positioning boss 43 of the magnetic yoke 4.

[0037] like Figure 2 and Figure 6 As shown, the magnetic yoke 4 in this embodiment is a U-shaped structure with its opening facing the armature 2. One side of the magnetic yoke 4 passes through the central hole of the coil, the magnetic yoke mounting part 42 is the other side of the magnetic yoke 4, the attraction surface 41 is the end face of both sides of the magnetic yoke 4, one end of the permanent magnet 3 near the armature 2 is fixed in the first fixing hole 611, and the other end of the permanent magnet 3 is placed on the bottom edge of the magnetic yoke 4.

[0038] like Figure 3 As shown, the electromagnetic relay core device of this embodiment also includes a coil frame 8. The coil is sleeved on the coil frame 8. The axis of the coil frame 8 is parallel to the axis of the first fixing hole 611 of the fixing member 6. The coil frame 8 is snapped to the housing 1. The coil frame 8 is provided with a second buckle 81. The housing 1 is provided with a second bayonet 112 that cooperates with the second buckle 81.

[0039] like Figure 1 and Figure 3 As shown, the housing 1 in this embodiment includes a base 11 and a cover 12. The cover 12 covers the base 11 and is snapped together with the base 11. The base 11 is provided with a third buckle 113 and the cover 12 is provided with a third latch 121 that cooperates with the third buckle 113.

[0040] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0041] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. An electromagnetic relay core device, comprising a housing (1), a coil, an armature (2), a permanent magnet (3), a yoke (4), and a spring (5) installed within the housing (1), wherein the permanent magnet (3) and the yoke (4) are respectively disposed opposite to the armature (2), the yoke (4) has a attracting surface (41) on the side facing the armature (2), and the yoke (4) at least partially passes through the center hole of the coil, the armature (2) is movable between a first position and a second position, and the armature (2) is attracted to the attracting surface (41) when in the first position; characterized in that: The core device also includes a fixing member (6) fixed inside the housing (1). The fixing member (6) has a first fixing hole (611) and a second fixing hole (621). The permanent magnet (3) is at least partially interference-fixed in the first fixing hole (611). The yoke (4) includes a yoke mounting part (42). The yoke mounting part (42) is at least partially interference-fixed in the second fixing hole (621).

2. The electromagnetic relay core device according to claim 1, characterized in that: The armature (2) is oscillating and has an oscillating fulcrum (21). The core device also includes a limiting member (7), which includes a limiting part (71). The limiting part (71) is located on the path of the oscillating fulcrum (21) of the armature (2) moving from the first position to the second position, and is used to block the oscillating fulcrum (21) at the second position.

3. The electromagnetic relay core device according to claim 2, characterized in that: The swing fulcrum (21) has a mating inclined surface (211) on the side facing the limiting part (71). When the armature (2) is in the first position, the mating inclined surface (211) is set at an angle to the limiting part (71). When the armature (2) is in the second position, the mating inclined surface (211) is in contact with the limiting part (71).

4. The electromagnetic relay core device according to claim 2, characterized in that: The armature (2) has a straight plate structure. The swing fulcrum (21) is provided on the middle side of the armature (2). One end of the armature (2) is connected to the spring (5), and the other end of the armature (2) is the armature drive end.

5. The electromagnetic relay core device according to claim 2, characterized in that: The limiting member (7) also includes a limiting member mounting part (72), which is at least partially interference-fixed in the second fixing hole (621). The limiting member mounting part (72) is provided with a positioning hole (721), and the magnetic yoke mounting part (42) is provided with a positioning boss (43) that cooperates with the positioning hole (721).

6. The electromagnetic relay core device according to claim 5, characterized in that: Both the limiting component mounting part (72) and the magnetic yoke mounting part (42) are straight plate structures and are stacked. The width of the limiting component mounting part (72) is greater than the width of the magnetic yoke mounting part (42). The second fixing hole (621) is a square hole that is interference-fitted with the limiting component mounting part (72). The side wall of the second fixing hole (621) is provided with two protruding ribs (622) located on both sides of the width direction of the magnetic yoke mounting part (42).

7. The electromagnetic relay core device according to claim 1, characterized in that: The fastener (6) is snapped into the housing (1). The fastener (6) is provided with a first buckle (63), and the housing (1) is provided with a first slot (111) that cooperates with the first buckle (63).

8. The electromagnetic relay core device according to claim 1, characterized in that: The magnetic yoke (4) is a U-shaped structure with its opening facing the armature (2). One side of the magnetic yoke (4) passes through the central hole of the coil. The magnetic yoke mounting part (42) is the other side of the magnetic yoke (4). The attraction surface (41) is the end face of both sides of the magnetic yoke (4). One end of the permanent magnet (3) near the armature (2) is fixed in the first fixing hole (611). The other end of the permanent magnet (3) is placed on the bottom edge of the magnetic yoke (4).

9. The electromagnetic relay core device according to claim 1, characterized in that: It also includes a coil frame (8), on which the coil is fitted. The axis of the coil frame (8) is parallel to the axis of the first fixing hole (611) of the fixing member (6). The coil frame (8) is snapped to the housing (1). The coil frame (8) is provided with a second buckle (81). The housing (1) is provided with a second bayonet (112) that cooperates with the second buckle (81).

10. The electromagnetic relay core device according to claim 1, characterized in that: The housing (1) includes a base (11) and a cover (12). The cover (12) covers the base (11) and is snapped together with the base (11). The base (11) is provided with a third snap (113), and the cover (12) is provided with a third latch (121) that cooperates with the third snap (113).

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