Movable iron core of electromagnetic relay

Abstract

The utility model provides a movable iron core of an electromagnetic relay, which comprises a movable iron core body which is used for being inserted into an iron core guide sleeve and is in sliding connection with the iron core guide sleeve. A shaft hole is coaxially formed in the middle of the movable iron core body, and one end of a connecting shaft is inserted into the shaft hole; a through hole with the aperture smaller than that of the shaft hole is formed in the upper end of the shaft hole, the through hole and the shaft hole are coaxially formed, the through hole is used for allowing a riveting column coaxially arranged at the upper end of the connecting shaft to penetrate through, and an annular step is formed in the joint of the upper end of the shaft hole and the lower end of the through hole; the upper end of the riveting column penetrates through the through hole and then extends out of the through hole, the upper end of the riveting column forms an annular convex edge after being pressed and riveted, and the annular convex edge tightly abuts against the outer top of the movable iron core body; the utility model has the advantage that the assembling reliability of the movable iron core body and the connecting shaft is high.

Description

Technical Field

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

[0002] The moving iron core is a crucial component in electromagnetic relays, forming the magnetic circuit structure. Currently, commercially available moving iron cores used in electromagnetic relays include the moving iron core body, which is inserted into and slidably connected to the core guide sleeve. A threaded blind hole is located in the middle of the moving iron core body, and this hole is threadedly connected to one end of the connecting shaft in the electromagnetic relay to achieve assembly between the moving iron core body and the connecting shaft. However, in this structure, because the moving iron core body is assembled to one end of the connecting shaft via a threaded connection, it is prone to detaching from the connecting shaft during long-term reciprocating movement due to the rotation of the moving iron core relative to the connecting shaft. This results in poor reliability of the assembly between the moving iron core and the connecting shaft. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an electromagnetic relay moving iron core, which has the advantage of high reliability in the assembly of the moving iron core body and the connecting shaft.

[0004] This utility model provides an electromagnetic relay moving iron core, including a moving iron core body, which is used to be inserted into an iron core guide sleeve and slidably connected to the iron core guide sleeve; a shaft hole is coaxially provided in the middle of the moving iron core body, which is used for inserting one end of a connecting shaft; a through hole with a diameter smaller than the shaft hole is provided at the upper end of the shaft hole, and the through hole is coaxially provided with the shaft hole, which is used for passing through a riveting post coaxially provided at the upper end of the connecting shaft; an annular step is formed at the connection between the upper end of the shaft hole and the lower end of the through hole, and one end of the connecting shaft abuts against the annular step; the upper end of the riveting post passes through the through hole and extends out of the through hole; the upper end of the riveting post is formed into an annular protrusion after being pressed and riveted, and the annular protrusion is tightly abutted against the outer top of the moving iron core body.

[0005] By adopting the above structure, this utility model effectively avoids the moving iron core body from detaching from the connecting shaft during the long-term reciprocating movement of the moving iron core, since the moving iron core body is riveted and fixed to one end of the connecting shaft. This gives it the advantage of high reliability in the assembly of the moving iron core body and the connecting shaft.

[0006] In one possible implementation, the outer peripheral wall of one end of the connecting shaft is tightly fitted with the wall of the shaft hole; by adopting this structure, one end of the connecting shaft can be reliably assembled with the shaft hole to avoid radial displacement of the moving iron core body relative to the connecting shaft, that is, to improve the stability of the moving iron core body after assembly with the connecting shaft.

[0007] In one possible implementation, a spline groove is provided circumferentially on the wall of the shaft hole. The spline groove is used to engage with the spline teeth on the outer wall of one end of the connecting shaft and to provide circumferential positioning. With this structure, after the spline teeth on the outer wall of one end of the connecting shaft engage with the spline groove on the wall of the shaft hole, the moving iron core body and the connecting shaft can be circumferentially positioned, thereby preventing the moving iron core body from rotating relative to the connecting shaft, which improves the stability of the moving iron core body and the connecting shaft after assembly.

[0008] In one possible implementation, an annular chamfered surface is provided on the inner wall of the lower end of the through hole. The annular chamfered surface is used to guide and cooperate with the outer wall of the rivet post so that the rivet post can be inserted into the through hole and pass through the through hole. By providing an annular chamfered surface on the inner wall of the lower end of the through hole, when the rivet post is inserted into the through hole, the annular chamfered surface can cooperate and guide the rivet post to be inserted into the through hole and pass through the through hole, which can facilitate the insertion and connection of the rivet post and the through hole. Attached Figure Description

[0009] Figure 1 This is the first three-dimensional structural schematic diagram of the present invention;

[0010] Figure 2 This is a second three-dimensional structural schematic diagram of the present invention;

[0011] Figure 3 This is a cross-sectional view of the moving iron core body and the connecting shaft after assembly. 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 1-3 As shown in the embodiment of this application, an electromagnetic relay moving iron core is disclosed, including a moving iron core body 1, which is used to be inserted into an iron core guide sleeve and slidably connected to the iron core guide sleeve; a shaft hole 11 is coaxially provided in the middle of the moving iron core body 1, which is used for inserting one end of a connecting shaft 2; a through hole 12 with a diameter smaller than the shaft hole 11 is provided at the upper end of the shaft hole 11, and the through hole 12 is coaxially provided with the shaft hole 11, which is used for passing through a riveting post 21 coaxially provided at the upper end of the connecting shaft 2; an annular step 13 is formed at the connection between 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 post 21 passes through the through hole 12 and extends out of the through hole 12; the upper end of the riveting post 21 is riveted to form an annular protrusion 211, and the annular protrusion 211 abuts tightly against the outer top of the moving iron core body 1.

[0017] The outer peripheral wall of one end of the connecting shaft 2 is tightly fitted with the hole wall of the shaft hole 11. By adopting this structure, one end of the connecting shaft can be reliably assembled with the shaft hole to avoid radial displacement of the moving iron core body relative to the connecting shaft, thereby improving the stability of the moving iron core body and the connecting shaft after assembly.

[0018] The shaft hole 11 has a spline groove 111 circumferentially provided on the hole wall. The spline groove 111 is used to engage with the spline teeth on the outer wall of one end of the connecting shaft 2 and to limit the circumferential movement. With this structure, after the spline teeth on the outer wall of one end of the connecting shaft engage with the spline groove on the hole wall of the shaft hole, the moving iron core body and the connecting shaft can achieve the purpose of circumferential limiting, thereby preventing the moving iron core body from rotating relative to the connecting shaft, which can improve the stability of the moving iron core body and the connecting shaft after assembly.

[0019] An annular chamfered surface 121 is provided on the inner wall of the lower end of the through hole 12. The annular chamfered surface 121 is used to cooperate with the outer wall of the rivet post 21 for guidance so that the rivet post 21 can be inserted into the through hole 12 and pass through the through hole 12. After providing an annular chamfered surface on the inner wall of the lower end of the through hole, when the rivet post is inserted into the through hole, the annular chamfered surface can cooperate with the outer wall of the rivet post for guidance so that the rivet post can be inserted into the through hole and pass through the through hole, which can facilitate the insertion of the rivet post into the through hole.

[0020] 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. An electromagnetic relay moving iron core, comprising a moving iron core body (1), wherein the moving iron core body (1) is used to be inserted into an iron core guide sleeve and slidably connected to the iron core guide sleeve; a shaft hole (11) is coaxially provided in the middle of the moving iron core body (1), wherein the shaft hole (11) is used for inserting one end of a connecting shaft (2); characterized in that: The upper end of the shaft hole (11) is provided with a through hole (12) with a diameter smaller than that of the shaft hole (11). The through hole (12) is coaxially arranged with the shaft hole (11). The through hole (12) is used for the riveting post (21) coaxially arranged at the upper end of the connecting shaft (2) to pass through. The connection between the upper end of the shaft hole (11) and the lower end of the through hole (12) forms an annular step (13). One end of the connecting shaft (2) abuts against the annular step (13). The upper end of the riveting post (21) passes through the through hole (12) and extends out of the through hole (12). The upper end of the riveting post (21) forms an annular protrusion (211) after being pressed and riveted, and the annular protrusion (211) abuts against the outer top of the moving iron core body (1).

2. The moving iron core of the electromagnetic relay according to claim 1, characterized in that: The outer peripheral wall of one end of the connecting shaft (2) is tightly fitted with the hole wall of the shaft hole (11).

3. The moving iron core of the electromagnetic relay according to claim 1 or 2, characterized in that: The hole wall of the shaft hole (11) is provided with a spline groove (111) in the circumferential direction. The spline groove (111) is used to engage with the spline teeth located on the outer wall of one end of the connecting shaft (2) and to limit the circumferential position.

4. The moving iron core of the electromagnetic relay according to claim 3, characterized in that: An annular chamfered surface (121) is provided on the inner wall of the lower end of the through hole (12). The annular chamfered surface (121) is used to cooperate with the outer wall of the rivet post (21) for guidance so that the rivet post (21) can be inserted into the through hole (12) and pass through the through hole (12).

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