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CN-224232603-U - Fixed iron core of electromagnetic relay

CN224232603UCN 224232603 UCN224232603 UCN 224232603UCN-224232603-U

Abstract

The utility model provides an electromagnetic relay fixed iron core, which comprises a fixed iron core body, wherein a shaft hole is coaxially arranged in the middle of the fixed iron core body, the shaft hole is used for allowing a connecting shaft to pass through, the upper end of the connecting shaft is used for being 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 used for being abutted against the upper end face of a base in a 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 assembly hole in the base in a penetrating manner from top to bottom, the annular boss is tightly attached to the hole wall of the assembly hole, a plurality of open slots are formed in the lower end of the annular boss along the circumferential direction of the annular boss, and after the riveting block is riveted by a riveting tool, the riveting block outwards expands and is abutted against the lower end face of the base in the relay.

Inventors

  • ZHANG LING

Assignees

  • 宁波高灵精密工业有限公司

Dates

Publication Date
20260512
Application Date
20250609

Claims (5)

  1. 1. The fixed iron core of the electromagnetic relay comprises a fixed iron core body (1), wherein an axle hole (11) is coaxially formed in the middle of the fixed iron core body (1), the axle hole (11) is used for a connecting shaft to pass through and is used for being fixed with a movable iron core, an annular convex edge (12) is formed in the peripheral wall of the lower portion of the fixed iron core body (1), the annular convex edge (12) is used for propping against the upper end face of a base in the relay, an annular boss (13) is coaxially arranged on the lower end face of the fixed iron core body (1), the annular boss (13) is arranged in an assembly hole in the base in a penetrating mode from top to bottom, the annular boss (13) is tightly attached to the wall of the assembly hole, and the electromagnetic relay is characterized in that a plurality of open grooves (14) are formed in the lower end of the annular boss (13) and along the circumferential direction of the annular boss (13), and the annular boss (13) between every two adjacent open grooves (14) are all formed into a joint block (131), and after the joint block (131) is riveted by a riveting tool, the joint block (131) is riveted tightly and the base is stretched out of the joint block (131).
  2. 2. The fixed iron core of the electromagnetic relay according to claim 1, characterized in that a space is reserved between the upper end of the open slot (14) and the lower end surface of the fixed iron core body (1).
  3. 3. The fixed iron core of electromagnetic relay according to claim 1 or 2, characterized in that the outer wall of the lower end of each riveting block (131) is provided with a chamfer surface (132), and the chamfer surface (132) is used for being matched and guided with the hole wall of the assembly hole so as to facilitate the riveting block (131) to pass through the assembly hole from top to bottom.
  4. 4. The fixed iron core of the electromagnetic relay according to claim 1, characterized in that a circumferential limit structure is arranged between the annular convex edge (12) and the base, and the circumferential limit structure is used for limiting the rotation of the fixed iron core body (1) relative to the base.
  5. 5. The fixed iron core of the electromagnetic relay according to claim 4, wherein a plurality of notches (121) are arranged on the outer side wall of the annular convex edge (12) and are distributed at intervals along the circumferential direction of the annular convex edge (12), and each notch (121) is vertically embedded with one of limit posts arranged on the upper end face of the base.

Description

Fixed iron core of electromagnetic relay Technical Field The utility model relates to the technical field of electromagnetic relay accessories, in particular to an electromagnetic relay fixed iron core. Background The fixed iron core is an important accessory for forming a magnetic circuit structure in an electromagnetic relay, the fixed iron core applied to the electromagnetic relay currently on the market comprises a fixed iron core body, a shaft hole is coaxially arranged in the middle of the fixed iron core body, the shaft hole is used for allowing a connecting shaft to pass through, the upper end of the connecting shaft is used for being 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 used for abutting against the upper end face 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 assembly hole penetrating through the base from top to bottom, the annular boss is tightly attached to the hole wall of the assembly hole, 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 enable the lower end of the annular boss to be outwards expanded and then tightly abutted against the lower end face of the base, so that the fixed iron core body and the base can be fastened. Disclosure of utility model The utility model aims to provide an electromagnetic relay fixed iron core, which can improve the fixing reliability of a fixed iron core body and a base. The utility model provides an electromagnetic relay fixed iron core, which comprises a fixed iron core body, wherein a shaft hole is coaxially arranged in the middle of the fixed iron core body, the shaft hole is used for a connecting shaft to pass through and the upper end of the connecting shaft is used for being 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 used for being abutted against the upper end face of a base in a 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 assembly hole in the base in a penetrating manner from top to bottom, the annular boss is tightly attached to the hole wall of the assembly hole, a plurality of open slots are formed in the lower end of the annular boss along the circumferential direction of the annular boss, and after the riveting block is riveted by a riveting tool, the riveting block outwards expands and is abutted against the lower end face of the base in the relay. According to the utility model, after the plurality of open slots are formed in the lower end of the annular boss along the circumferential direction of the annular boss, the annular boss between every two adjacent open slots can form the riveting block, and after the riveting block is pressed and riveted by the pressing and riveting tool, the riveting block can be easily expanded outwards and tightly abutted with the lower end face of the base in the relay, namely, the fixed iron core body and the base can be improved in fixing reliability. In one possible implementation mode, a space is reserved between the upper end of the open slot and the lower end face of the fixed iron core body, and after the structure is adopted, each riveting block can be kept to be connected with the lower end of the fixed iron core body through the annular boss, so that the connection strength of each riveting block and the fixed iron core body can be improved, and the situation that the riveting block breaks relative to the fixed iron core body when the riveting block is subjected to riveting through the riveting tool can be effectively avoided. In one possible implementation mode, the outer wall of the lower end of each riveting block is provided with a chamfer surface, the chamfer surface is used for being matched and guided with the hole wall of the assembly hole so that the riveting block can conveniently pass through the assembly hole from top to bottom, and by adopting the structure, when the fixed iron core body is assembled with the base in the relay, the chamfer surface can be matched and guided with the hole wall of the assembly hole so that the riveting block can conveniently pass through the assembly hole from top to bottom, namely, the assembly of the fixed iron core body and the base can be given. In one possible implementation mode, a circumferential limit structure is arranged between the annular convex edge and the base and used for limiting the fixed iron core body to rotate relative to the base, and after the circumferential limit structure is arranged between the annular convex edge and the base, the circumferential limit structure can limit the fixed iron core body to rotate relative to the base, namely, the reliability of the fix