CN-224217439-U - Electromagnetic relay iron core guide sleeve

CN224217439UCN 224217439 UCN224217439 UCN 224217439UCN-224217439-U

Abstract

The utility model provides an electromagnetic relay iron core guide sleeve, which comprises a guide sleeve body, wherein the guide sleeve body is injection molded in a support of an electromagnetic relay, the guide sleeve body is used for enabling a movable iron core to axially penetrate and be in sliding fit with the movable iron core, the outer peripheral wall of the movable iron core is attached to the inner peripheral wall of the guide sleeve body, a plurality of annular grooves are formed in the outer peripheral wall of the guide sleeve body at intervals along the axial direction of the guide sleeve body, the annular grooves are coaxially arranged with the guide sleeve body, and after the guide sleeve body and the support are injection molded, the plurality of annular grooves are embedded with the support.

Inventors

ZHANG LING

Assignees

宁波高灵精密工业有限公司

Dates

Publication Date: 20260508
Application Date: 20250609

Claims (4)

1. The electromagnetic relay iron core guide sleeve comprises a guide sleeve body (1), wherein the guide sleeve body (1) is injection molded in a support of an electromagnetic relay, the guide sleeve body (1) is used for enabling a movable iron core to axially penetrate through and be in sliding fit with the movable iron core, the outer peripheral wall of the movable iron core is attached to the inner peripheral wall of the guide sleeve body (1), and the electromagnetic relay iron core guide sleeve is characterized in that a plurality of annular grooves (11) are formed in the outer peripheral wall of the guide sleeve body (1) at intervals along the axial direction of the guide sleeve body (1), the annular grooves (11) are coaxially arranged with the guide sleeve body (1), and after the guide sleeve body (1) is injection molded with the support, the annular grooves (11) are embedded with the support.
2. The electromagnetic relay iron core guide sleeve according to claim 1, wherein a plurality of limit grooves (12) are circumferentially arranged on the outer side wall of the guide sleeve body (1), each limit groove (12) extends along the axial direction of the guide sleeve body (1), the limit grooves (12) and the annular grooves (11) are distributed in a crossed mode, and after the guide sleeve body (1) and the support are subjected to injection molding, the limit grooves (12) are embedded and fixed with the support.
3. The electromagnetic relay iron core guide sleeve according to claim 1 or 2, characterized in that an annular chamfer surface (13) is arranged on the inner wall of the lower end of the guide sleeve body (1), and the annular chamfer surface (13) is used for being matched and guided with the outer side wall of the movable iron core so as to facilitate the movable iron core to axially pass through the guide sleeve body (1).
4. The electromagnetic relay iron core guide sleeve according to claim 3, characterized in that the inner peripheral wall of the guide sleeve body (1) is coated with a wear-resistant coating.

Description

Electromagnetic relay iron core guide sleeve Technical Field The utility model relates to the technical field of electromagnetic relay accessories, in particular to an electromagnetic relay iron core guide sleeve. Background The guide sleeve is a fitting which is fixed on a support of the electromagnetic relay and used for the movable iron core to reciprocate in the support, in the existing electromagnetic relay structure, the guide sleeve is assembled with the support in an injection fixing mode, namely, the guide sleeve is injection molded on the inner side of the support of the electromagnetic relay, however, in the structure, because the guide sleeve is only injection molded on the inner side of the support, an axial limiting structure is not arranged between the guide sleeve and the support, and therefore, in the process of reciprocating displacement of the movable iron core relative to the guide sleeve for a long time, the situation that the guide sleeve is axially separated from the support is easily caused, namely, the defect of poor fixing reliability of the guide sleeve and the support exists. Disclosure of utility model The utility model aims to solve the technical problem of providing the electromagnetic relay iron core guide sleeve, which can effectively avoid the condition that the guide sleeve body axially breaks away from the bracket, namely has the advantage of high fixing reliability of the guide sleeve body and the bracket. The utility model provides an electromagnetic relay iron core guide sleeve, which comprises a guide sleeve body, wherein the guide sleeve body is injection molded in a support of an electromagnetic relay, the guide sleeve body is used for a movable iron core to axially penetrate and be in sliding fit with the movable iron core, the outer peripheral wall of the movable iron core is attached to the inner peripheral wall of the guide sleeve body, a plurality of annular grooves are formed in the outer peripheral wall of the guide sleeve body at intervals along the axial direction of the guide sleeve body, the annular grooves are coaxially arranged with the guide sleeve body, and after the guide sleeve body and the support are injection molded, the annular grooves are embedded with the support. By adopting the structure, after the guide sleeve body and the support are subjected to injection molding under the action of the annular grooves, the annular grooves can be embedded with the support, so that the axial limit of the guide sleeve body and the support can be realized, and further, the situation that the guide sleeve body axially breaks away from the support in the process of reciprocating displacement of the movable iron core relative to the guide sleeve body for a long time can be effectively avoided, namely, the guide sleeve body and the support have the advantage of high fixing reliability. In one possible implementation mode, a plurality of limiting grooves are circumferentially arranged on the outer side wall of the guide sleeve body, each limiting groove extends along the axial direction of the guide sleeve body, the limiting grooves and the annular grooves are distributed in a crossing mode, the limiting grooves are embedded with the support after the guide sleeve body is injection molded with the support, and each limiting groove can be embedded with the support after the guide sleeve body is injection molded into the support of the electromagnetic relay under the action of the limiting grooves after the guide sleeve body is in the structure, so that the situation that the guide sleeve body rotates relative to the support can be effectively avoided, and the embedded strength and reliability of the guide sleeve body and the support are further improved. In one possible implementation mode, the annular chamfer surface is arranged on the inner wall of the lower end of the guide sleeve body and is used for being matched and guided with the outer side wall of the movable iron core so as to facilitate the movable iron core to axially pass through the guide sleeve body, and after the annular chamfer surface is arranged on the inner wall of the lower end of the guide sleeve body, when the movable iron core is assembled with the guide sleeve body, the annular chamfer surface can be matched and guided with the outer side wall of the movable iron core so as to facilitate the movable iron core to circumferentially pass through the guide sleeve body, namely, the convenience is brought to the insertion of the movable iron core and the guide sleeve body. In one possible implementation mode, the inner peripheral wall of the guide sleeve body is coated with the wear-resistant coating, and after the inner peripheral wall of the guide sleeve body is coated with the wear-resistant coating, the abrasion of the guide sleeve body can be effectively avoided in the process that the movable iron core axially reciprocates relative to the guide sleeve body for a long time, namely, the coax