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CN-224232607-U - Movable iron core of electromagnetic relay

CN224232607UCN 224232607 UCN224232607 UCN 224232607UCN-224232607-U

Abstract

The utility model provides an electromagnetic relay movable iron core, which comprises a movable iron core body, wherein the movable iron core body is inserted in an iron core guide sleeve and is in sliding connection with the iron core guide sleeve, a shaft hole is coaxially arranged in the middle of the movable iron core body and is used for inserting one end of a connecting shaft, a through hole with the aperture smaller than that of the shaft hole is arranged at the upper end of the shaft hole, the through hole is coaxially arranged with the shaft hole and is used for allowing a riveting column coaxially arranged at the upper end of the connecting shaft to pass through, an annular step is formed at the joint of the upper end of the shaft hole and the lower end of the through hole, one end of the connecting shaft abuts against the annular step, the upper end of the riveting column extends out of the through hole after passing through the through hole, an annular convex edge is formed after the upper end of the riveting column is riveted by pressing, and the annular convex edge abuts against the outer top of the movable iron core body.

Inventors

  • ZHANG LING

Assignees

  • 宁波高灵精密工业有限公司

Dates

Publication Date
20260512
Application Date
20250609

Claims (4)

  1. 1. The movable iron core of the electromagnetic relay comprises a movable iron core body (1), wherein the movable iron core body (1) is inserted into an iron core guide sleeve and is in sliding connection with the iron core guide sleeve, a shaft hole (11) is coaxially formed in the middle of the movable iron core body (1), one end of the shaft hole (11) is used for inserting one end of a connecting shaft (2), the electromagnetic relay is characterized in that a through hole (12) with the aperture smaller than that of the shaft hole (11) is formed in the upper end of the shaft hole (11), the through hole (12) is coaxially arranged with the shaft hole (11), the through hole (12) is used for allowing a riveting column (21) coaxially arranged at the upper end of the connecting shaft (2) to penetrate through, an annular step (13) is formed at the joint of the upper end of the shaft hole (11) and the lower end of the through hole (12), one end of the connecting shaft (2) abuts against the annular step (13), the upper end of the riveting column (21) penetrates through the through hole (12) and then stretches out of the through hole (12), and the upper end of the riveting column (21) forms an annular convex edge (211) after being pressed, and the upper end of the riveting column (21) abuts against the upper end of the iron core (1).
  2. 2. The movable iron core of the electromagnetic relay according to claim 1, wherein the peripheral wall of one end of the connecting shaft (2) is tightly matched with the hole wall of the shaft hole (11).
  3. 3. The electromagnetic relay movable iron core according to claim 1 or 2, characterized in that spline tooth grooves (111) are circumferentially arranged on the hole wall of the shaft hole (11), and the spline tooth grooves (111) are used for being matched and spliced with spline teeth positioned on the outer wall of one end of the connecting shaft (2) and circumferentially limited.
  4. 4. The movable iron core of the electromagnetic relay according to claim 3, wherein an annular chamfer surface (121) is arranged on the inner wall of the lower end of the through hole (12), and the annular chamfer surface (121) is used for being matched and guided with the outer wall of the riveting column (21) so as to facilitate the insertion of the riveting column (21) into the through hole (12) and pass through the through hole (12).

Description

Movable 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 movable iron core. Background The movable iron core is an important accessory for forming a magnetic circuit structure in the electromagnetic relay, the movable iron core applied to the electromagnetic relay currently on the market comprises a movable iron core body, the movable iron core body is used for being inserted in an iron core guide sleeve and in sliding connection with the iron core guide sleeve, a threaded blind hole is formed in the middle of the movable iron core body and is in threaded connection with one end of a connecting shaft in the electromagnetic relay so as to assemble the movable iron core body and the connecting shaft, however, in the structure, the movable iron core body is assembled on one end of the connecting shaft in a threaded connection mode, so that the movable iron core is easy to break away from the connecting shaft due to rotation of the movable iron core relative to the connecting shaft in the long-term reciprocating movement process, and the defect of poor assembling reliability of the movable iron core and the connecting shaft exists. Disclosure of utility model The utility model aims to solve the technical problem of providing an electromagnetic relay movable iron core, which has the advantage of high assembly reliability of a movable iron core body and a connecting shaft. The utility model provides an electromagnetic relay movable iron core which comprises a movable iron core body, wherein the movable iron core body is inserted into an iron core guide sleeve and is in sliding connection with the iron core guide sleeve, a shaft hole is coaxially arranged in the middle of the movable iron core body and is used for inserting one end of a connecting shaft, a through hole with the aperture smaller than that of the shaft hole is arranged at the upper end of the shaft hole, the through hole is coaxially arranged with the shaft hole and is used for allowing a riveting column coaxially arranged at the upper end of the connecting shaft to pass through, an annular step is formed at the joint of the upper end of the shaft hole and the lower end of the through hole, one end of the connecting shaft abuts against the annular step, the upper end of the riveting column extends out of the through hole after passing through the through hole, an annular convex edge is formed after the upper end of the riveting column is riveted by pressing, and the annular convex edge abuts against the outer top of the movable iron core body. By adopting the structure, the movable iron core body is riveted and fixed at one end of the connecting shaft, so that the situation that the movable iron core body is separated from the connecting shaft in the process of long-term reciprocating movement of the movable iron core can be effectively avoided, and the movable iron core has the advantage of high assembly reliability of the movable iron core body and the connecting shaft. In one possible implementation mode, the outer peripheral wall of one end of the connecting shaft is tightly matched with the hole wall of the shaft hole, and by adopting the structure, one end of the connecting shaft can be further reliably assembled with the shaft hole, so that the situation that the movable iron core body is radially displaced relative to the connecting shaft is avoided, and the stability of the movable iron core body after being assembled with the connecting shaft can be improved. In one possible implementation mode, spline tooth grooves are circumferentially arranged on the hole wall of the shaft hole and are used for being matched and spliced with spline teeth on the outer wall of one end of the connecting shaft and limiting circumferentially, after the structure is adopted, the spline teeth on the outer wall of one end of the connecting shaft are matched and spliced with the spline tooth grooves on the hole wall of the shaft hole, the purpose of limiting circumferentially can be achieved between the movable iron core body and the connecting shaft, and therefore the situation that the movable iron core body rotates relative to the connecting shaft can be avoided, and the stability of the movable iron core body after being assembled with the connecting shaft can be improved. In one possible implementation mode, the annular chamfer surface is arranged on the inner wall of the lower end of the through hole and is used for being matched and guided with the outer wall of the riveting column so as to facilitate the insertion of the riveting column into the through hole and the penetration of the through hole, and after the annular chamfer surface is arranged on the inner wall of the lower end of the through hole, the annular chamfer surface can be matched and guided with the outer wall of the riveting column so as to facilitate the inse