Fixed iron core of electromagnetic relay

Abstract

The utility model provides a fixed iron core of an electromagnetic relay, which comprises a fixed iron core body, a shaft hole is coaxially arranged in the middle of the fixed iron core body, a connecting shaft passes through the shaft hole, and the upper end of the connecting shaft is fixed with a movable iron core; an annular convex edge is arranged on the peripheral wall of the lower part of the fixed iron core body and is used for abutting against the upper end surface of a base in the relay; an annular boss is coaxially arranged on the lower end face of the fixed iron core body, the annular boss is arranged in an assembling hole in the base in a penetrating mode from top to bottom, and the annular boss is tightly attached to the hole wall of the assembling hole. A plurality of opening grooves are formed in the lower end of the annular boss in the circumferential direction of the annular boss, and riveting blocks are formed in the positions, between every two adjacent opening grooves, of the annular boss; after the riveting block is riveted by the riveting tool, the riveting block expands outwards and abuts against the lower end face of the base in the relay. According to the utility model, the fixing reliability of the fixed iron core body and the base can be improved.

Description

Technical Field

[0001] This utility model relates to the technical field of electromagnetic relay accessories, and more specifically, to an electromagnetic relay stator core. Background Technology

[0002] The stationary iron core is a crucial component in electromagnetic relays, forming the magnetic circuit structure. Currently, commercially available stationary iron cores for electromagnetic relays include: a stationary iron core body; a coaxial shaft hole in the center of the body for a connecting shaft to pass through, with the upper end of the shaft used to fix the moving iron core; an annular protrusion on the lower outer peripheral wall of the stationary iron core body, which abuts against the upper surface of the relay's base; and a coaxial annular boss on the lower end face of the stationary iron core body, which passes through a mounting hole in the base from top to bottom, with the boss tightly fitted against the hole wall. In addition, after the annular boss passes through the assembly hole, the lower end of the annular boss is riveted by a riveting tool to expand the lower end of the annular boss outward and tightly abut against the lower end face of the base, thereby achieving the fastening of the fixed iron core body and the base. However, in the above structure, since the annular boss is an annular structure, there is a disadvantage that the annular boss is difficult to deform when the riveting tool rivets the annular boss, that is, the deformation of the annular boss is small, which leads to a poor tight abutment effect between the annular boss and the base, that is, poor fixing reliability between the fixed iron core body and the base. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an electromagnetic relay stator core that can improve the fixing reliability of the stator core body and the base.

[0004] This utility model provides a fixed iron core for an electromagnetic relay, including a fixed iron core body. A shaft hole is coaxially provided in the middle of the fixed iron core body, allowing a connecting shaft to pass through, and the upper end of the connecting shaft is used to fix a moving iron core. An annular protrusion is provided on the lower outer peripheral wall of the fixed iron core body, abutting against the upper end face of the base in the relay. An annular boss is coaxially provided on the lower end face of the fixed iron core body, passing through a mounting hole on the base from top to bottom, with the annular boss tightly against the hole wall. Several opening slots are provided on the lower end of the annular boss along its circumferential direction, and each pair of adjacent opening slots forms a riveting block between the annular bosses. When the riveting block is riveted by a riveting tool, the riveting block expands outward and tightly abuts against the lower end face of the base in the relay.

[0005] This invention provides several opening slots on the lower end of the annular boss along its circumferential direction. Each pair of adjacent opening slots can form a riveting block between the annular bosses. After the riveting block is pressed by a riveting tool, it can easily expand outward and abut against the lower end face of the base in the relay. This provides the advantage of good abutment between the riveting block and the lower end face of the base, thereby improving the fixing reliability of the fixed iron core body and the base.

[0006] In one possible implementation, a gap is left between the upper end of the opening slot and the lower end face of the fixed iron core body. By adopting this structure, each rivet block can be connected to the lower end of the fixed iron core body through the annular boss, thereby improving the connection strength between each rivet block and the fixed iron core body. This effectively prevents the rivet block from breaking relative to the fixed iron core body when it is riveted by the rivet tool.

[0007] In one possible implementation, a chamfered surface is provided on the outer wall of the lower end of each rivet block. The chamfered surface is used to cooperate with the wall of the assembly hole to guide the rivet block through the assembly hole from top to bottom. With this structure, when the fixed iron core body is assembled with the base in the relay, the chamfered surface can cooperate with the wall of the assembly hole to guide the rivet block through the assembly hole from top to bottom, which can facilitate the assembly of the fixed iron core body and the base.

[0008] In one possible implementation, a circumferential limiting structure is provided between the annular protrusion and the base. The circumferential limiting structure is used to restrict the rotation of the fixed iron core body relative to the base. By providing a circumferential limiting structure between the annular protrusion and the base, the circumferential limiting structure can restrict the rotation of the fixed iron core body relative to the base, thereby improving the reliability of the fixed iron core body after it is fastened to the base.

[0009] In one possible implementation, the outer wall of the annular protrusion is provided with a number of notches spaced apart along the circumferential direction of the annular protrusion. Each notch is used to vertically engage with one of the limiting posts provided on the upper surface of the base. With this structure, after the annular protrusion is inserted into the mounting hole on the base from top to bottom, each notch can vertically engage with one of the limiting posts provided on the upper surface of the base, thereby facilitating the circumferential positioning of the fixed iron core body and the base. Attached Figure Description

[0010] Figure 1 This is the first three-dimensional structural schematic diagram of the present invention;

[0011] Figure 2 This is a second three-dimensional structural diagram of the present invention. Detailed Implementation

[0012] First, those skilled in the art should understand that these embodiments are merely used to explain the technical principles of the embodiments of this application and are not intended to limit the scope of protection of the embodiments of this application. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0013] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0014] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0015] The present application will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0016] See Figure 1-2 As shown in the embodiment of this application, an electromagnetic relay fixed core is disclosed, including a fixed core body 1. A shaft hole 11 is coaxially provided in the middle of the fixed core body 1. The shaft hole 11 is used for a connecting shaft to pass through, and the upper end of the connecting shaft is used to fix it to the moving core. An annular protrusion 12 is provided on the outer peripheral wall of the lower part of the fixed core body 1. The annular protrusion 12 is used to abut against the upper end face of the base in the relay. An annular boss 13 is coaxially provided on the lower end face of the fixed core body 1. The annular boss 13 passes through the mounting hole on the base from top to bottom. The annular boss 13 is in close contact with the hole wall of the mounting hole. A plurality of opening slots 14 are provided on the lower end of the annular boss 13 and along the circumferential direction of the annular boss 13. A riveting block 131 is formed between each two adjacent opening slots 14 of the annular boss 13. When the riveting block 131 is riveted by a riveting tool, the riveting block 131 expands outward and abuts against the lower end face of the base in the relay.

[0017] A gap is left between the upper end of the opening slot 14 and the lower end face of the fixed iron core body 1. By adopting this structure, each rivet block can be connected to the lower end of the fixed iron core body through the annular boss, thereby improving the connection strength between each rivet block and the fixed iron core body. This effectively prevents the rivet block from breaking relative to the fixed iron core body when it is riveted by the rivet tool.

[0018] Each rivet block 131 has a chamfered surface 132 on its lower outer wall. The chamfered surface 132 is used to cooperate with the wall of the assembly hole to guide the rivet block 131 through the assembly hole from top to bottom. With this structure, when the fixed iron core body is assembled with the base in the relay, the chamfered surface can cooperate with the wall of the assembly hole to guide the rivet block through the assembly hole from top to bottom, which can facilitate the assembly of the fixed iron core body and the base.

[0019] A circumferential limiting structure is provided between the annular protrusion 12 and the base. The circumferential limiting structure is used to restrict the rotation of the fixed iron core body 1 relative to the base. After the circumferential limiting structure is provided between the annular protrusion and the base, the circumferential limiting structure can restrict the rotation of the fixed iron core body relative to the base, which can improve the reliability of the fixed iron core body after it is fastened to the base.

[0020] The outer wall of the annular protrusion 12 is provided with a number of notches 121 that are spaced apart along the circumferential direction of the annular protrusion 12. Each notch 121 is used to vertically engage with one of the limiting posts provided on the upper end face of the base. With this structure, after the annular protrusion is inserted into the mounting hole on the base from top to bottom, each notch can vertically engage with one of the limiting posts provided on the upper end face of the base, thereby facilitating the circumferential positioning of the fixed iron core body and the base.

[0021] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fixed iron core for an electromagnetic relay, comprising a fixed iron core body (1), wherein a shaft hole (11) is coaxially provided in the middle of the fixed iron core body (1), the shaft hole (11) is used for a connecting shaft to pass through and the upper end of the connecting shaft is used to fix a moving iron core; an annular protrusion (12) is provided on the outer peripheral wall of the lower part of the fixed iron core body (1), the annular protrusion (12) is used to abut against the upper end face of the base in the relay; an annular boss (13) is coaxially provided on the lower end face of the fixed iron core body (1), the annular boss (13) is provided from top to bottom in the mounting hole on the base, and the annular boss (13) is in close contact with the hole wall of the mounting hole; characterized in that: The lower end of the annular boss (13) is provided with a plurality of opening slots (14) along the circumferential direction of the annular boss (13). A riveting block (131) is formed between each two adjacent opening slots (14) of the annular boss (13). When the riveting block (131) is riveted by a riveting tool, the riveting block (131) expands outward and abuts against the lower end face of the base in the relay.

2. The stator core of the electromagnetic relay according to claim 1, characterized in that: There is a gap between the upper end of the opening slot (14) and the lower end face of the fixed iron core body (1).

3. The stator core of the electromagnetic relay according to claim 1 or 2, characterized in that: Each of the riveting blocks (131) has a chamfered surface (132) on the outer wall at the lower end. The chamfered surface (132) is used to cooperate with the wall of the assembly hole for guidance so that the riveting block (131) can pass through the assembly hole from top to bottom.

4. The stator core of the electromagnetic relay according to claim 1, characterized in that: A circumferential limiting structure is provided between the annular protrusion (12) and the base, and the circumferential limiting structure is used to restrict the rotation of the fixed iron core body (1) relative to the base.

5. The stator core of the electromagnetic relay according to claim 4, characterized in that: The outer wall of the annular protrusion (12) is provided with a number of notches (121) spaced apart along the circumferential direction of the annular protrusion (12), and each notch (121) is used to vertically engage with one of the limiting posts provided on the upper surface of the base.

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