Magnetic circuit structure of relay and relay

Abstract

The utility model relates to a magnetic circuit structure of a relay and the relay, and the magnetic circuit structure of the relay comprises a coil rack, a coil wound on the coil rack, a static iron core which is fixedly arranged, an armature which is movably arranged in an inner hole of the coil rack, and a yoke which is used for sealing a magnetic circuit. The yoke comprises a front yoke part fixedly arranged at the axial end of the coil frame, a first stepped groove and a second stepped groove are formed in the front yoke part and the axial end, opposite to the front yoke part, of the coil frame respectively, and the two ends of the static iron core are located and contained in the first stepped groove and the second stepped groove respectively. And two ends of the static iron core are respectively clamped and fixed by the coil rack and the front yoke part. According to the utility model, a positioning and fixing structure of the static iron core is formed through the front yoke iron part, axial and radial positioning and fixing of the static iron core can be realized without additionally arranging other parts, the number of relay assembling parts is reduced, installation and positioning of the static iron core are more convenient, and the assembling efficiency of the relay is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of switch electric appliances, concretely relates to the magnetic circuit structure of relay. BACKGROUND

[0002] The magnetic circuit structure that coil energization generates magnetic field and drives armature (or called moving iron core) movement is commonly used in relay, in this kind of magnetic circuit structure, in order to reduce assembly difficulty, reduce cost, static iron core is often installed on coil frame, but when positioning and fixing static iron core in axial and radial, generally still need to set additional parts (such as snap ring) to cooperate with the installation of static iron core, which causes the problems of more relay parts and more assembly procedures. UTILITARIAN CONTENT

[0003] In view of the above problems, the utility model provides a kind of magnetic circuit structure of relay with optimized structure, and based on the magnetic circuit structure of relay, a kind of relay is provided.

[0004] The utility model adopts the following technical scheme to realize:

[0005] The utility model provides a kind of magnetic circuit structure of relay, including coil frame, coil that is wound on coil frame, fixedly set static iron core, movablely set armature in the inner hole of coil frame and yoke for closing magnetic circuit, yoke includes front yoke part that is fixedly arranged in the axial end of coil frame, first stepped groove and second stepped groove are respectively arranged on the axial end of front yoke part and coil frame opposite to it, the both ends of static iron core are respectively positioned and accommodated in first stepped groove and second stepped groove, and the both ends of static iron core are clamped and fixed by coil frame and front yoke part.

[0006] Preferably, static iron core includes laminated magnetic steel and static iron sheet, static iron sheet and armature are oppositely arranged, and magnetic steel is arranged between static iron sheet and front yoke part.

[0007] Preferably, in the state that relay is disconnected, the distance between static iron sheet and front yoke part is less than the distance between static iron sheet and armature.

[0008] Preferably, front yoke part is in sheet structure, and first stepped groove is formed by local subsidence in the middle position of front yoke part.

[0009] Preferably, yoke further includes U-shaped yoke part, both ends of U-shaped yoke part are connected to front yoke part, and U-shaped yoke part extends around the outer periphery of coil frame.

[0010] Preferably, magnetically conductive ring is coaxially arranged in the inner hole of coil frame, magnetically conductive ring is correspondingly arranged at the outer periphery of armature, and magnetically conductive ring and U-shaped yoke part abut.

[0011] Preferably, the armature is fixedly connected to the end of the push rod, and the return spring is sleeved on the push rod, one end of the return spring abutting against the static iron core, and the other end abutting against the armature.

[0012] Preferably, the armature is fixedly connected to the end of the push rod by a screw.

[0013] The utility model discloses still propose a kind of relays, including magnetic circuit structure, the magnetic circuit structure is the magnetic circuit structure of the relay as described above.

[0014] The utility model has the following beneficial effects: the utility model forms the positioning and fixed structure of static iron core by front yoke iron part, can realize static iron core axial, radial positioning and fixed without additional setting other parts, reduce the quantity of relay assembly parts, also make the installation positioning of static iron core more convenient, improve the assembly efficiency of relay. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the sectional view of the magnetic circuit structure of the relay in the embodiment;

[0016] Figure 2 It is the sectional view of the front yoke iron part in the embodiment;

[0017] Figure 3 It is the sectional view of the coil holder in the embodiment;

[0018] Figure 4 It is the three-dimensional schematic view of the front yoke iron part in the embodiment. DETAILED DESCRIPTION

[0019] To further illustrate the embodiments, the utility model provides drawings. These drawings are part of the disclosure of the utility model, mainly used to illustrate the embodiments, and can be explained with the related description of the specification to explain the operating principle of the embodiments. With reference to these contents, those skilled in the art should understand other possible embodiments and the advantages of the utility model. The components in the drawing are not drawn according to scale, and similar component symbols are usually used to represent similar components.

[0020] The utility model will be further illustrated in conjunction with the drawings and specific embodiments.

[0021] Reference Figures 1-4As shown, as the preferred embodiment of the utility model, provide a kind of magnetic circuit structure of relay, can be applied in relay, magnetic circuit structure includes coil holder 1, coil 2 that is wound on coil holder 1, static core 3 that is fixedly arranged, armature 4 (or called moving core) that is movably arranged in the inner hole of coil holder 1 and yoke 5 for closing magnetic circuit, according to the excitation magnetic field generated when coil 2 is energized to drive armature 4 to slide in the inner hole of coil holder 1.

[0022] Wherein, yoke 5 includes front yoke part 51 fixedly arranged at the axial end of coil holder 1, first step groove 10 and second step groove 20 are respectively arranged on the axial end of coil holder 1 and the front yoke part 51 opposite, the two ends of static core 3 are respectively positioned and accommodated in first step groove 10 and second step groove 20, and the two ends of static core are clamped and fixed by coil holder 1 and front yoke part 51. After such setting, the positioning and fixing structure of static core 3 is formed by front yoke part 51 in the embodiment, the axial and radial positioning and fixing of static core 3 can be realized without additional setting of other parts, the number of relay assembly parts is reduced, the installation and positioning of static core 3 are more convenient, and the assembly efficiency of relay is improved.

[0023] Static core 3 further includes laminated magnetic steel 32 and static sheet 31, static sheet 31 and armature 4 are oppositely arranged, and magnetic steel 32 is arranged between static sheet 31 and front yoke part 51. Figure 1 In the off state of relay, the distance between static sheet 31 and front yoke part 51 is less than the distance between static sheet 31 and armature 4, since the positioning and fixing structure of static core 3 is formed by front yoke part 51 in the embodiment, static core 3 does not need to be completely inserted into coil holder 1 to realize installation, in other words, static core 3 in the embodiment can be installed at a position closer to the outer end of coil holder 1, so that the distance between static sheet 31 and armature 4 in off state is farther, and the stability of off state is maintained.

[0024] In the embodiment, front yoke part 51 is in sheet structure, and first step groove 10 is formed by partially sinking in the middle position of front yoke part 51. Yoke 5 further includes U-shaped yoke part 52, two ends of U-shaped yoke part 52 are connected to front yoke part 51, and U-shaped yoke part 52 extends around the outer periphery of coil holder 1, so as to constitute the closure of magnetic circuit. Magnetic conducting ring 8 is coaxially arranged in the inner hole of coil holder 1, magnetic conducting ring 8 is correspondingly arranged at the outer periphery of armature 4, and magnetic conducting ring 8 and U-shaped yoke part 52 abut, so as to improve the magnetic conducting efficiency.

[0025] The push rod 6 extends through the static iron core 3 and in the inner hole of the coil frame 1, the armature 4 is fixedly connected to the end of the push rod 6, the reset spring 9 is sleeved on the push rod 6, one end of the reset spring 9 abuts against the static iron core 3, and the other end abuts against the armature 4. The movable contact 7 is also installed on the push rod 6, and the action of the armature 4 can be converted into the movement of the push rod 6 and the movable contact 7, so that the on or off of the relay contact system is realized. In the embodiment, the armature 4 is locked on the end of the push rod 6 through a screw, so as to facilitate the assembly of the relay.

[0026] Although the utility model is specifically shown and introduced in combination with the preferred embodiments, it should be understood by those skilled in the art that various changes can be made to the utility model in form and details without departing from the spirit and scope of the utility model defined in the appended claims, and all fall within the protection scope of the utility model.

Claims

1. A magnetic circuit structure of a relay comprising a coil holder, a coil wound on the coil holder, a fixedly disposed static core, a movable armature disposed in a bore of the coil holder, and a yoke for closing the magnetic circuit, characterized in that: The yoke iron comprises a front yoke iron part fixed at the axial end of the coil holder, a first stepped groove and a second stepped groove are respectively arranged on the front yoke iron part and the axial end of the coil holder opposite to the front yoke iron part, the two ends of the static iron core are respectively positioned and accommodated in the first stepped groove and the second stepped groove, and the two ends of the static iron core are clamped and fixed by the coil holder and the front yoke iron part.

2. The magnetic circuit structure of a relay according to claim 1, characterized by: The static iron core comprises a laminated magnetic steel and a static iron sheet, the static iron sheet and the armature are oppositely arranged, and the magnetic steel is arranged between the static iron sheet and the front yoke iron part.

3. The magnetic circuit structure of a relay according to claim 2, characterized by: In the off state of the relay, the distance between the static iron sheet and the front yoke iron part is smaller than the distance between the static iron sheet and the armature.

4. The magnetic circuit structure of a relay according to claim 1, characterized by: The front yoke iron part is in a sheet structure, and the first stepped groove is formed by locally sinking in the middle position of the front yoke iron part.

5. The magnetic circuit structure of a relay according to claim 1, characterized by: The yoke iron further comprises a U-shaped yoke iron part, the two ends of the U-shaped yoke iron part are connected to the front yoke iron part, and the U-shaped yoke iron part extends around the outer periphery of the coil holder.

6. The magnetic circuit structure of a relay according to claim 5, characterized by: A magnetic conducting ring is coaxially arranged in the inner hole of the coil holder, the magnetic conducting ring is correspondingly arranged at the outer periphery of the armature, and the magnetic conducting ring abuts against the U-shaped yoke iron part.

7. The magnetic circuit structure of a relay according to claim 1, characterized by: A push rod and a return spring are further arranged, the push rod passes through the static iron core and extends in the inner hole of the coil holder, the armature is fixedly connected to the end of the push rod, the return spring is sleeved on the push rod, one end of the return spring abuts against the static iron core, and the other end of the return spring abuts against the armature.

8. The magnetic circuit structure of a relay according to claim 7, characterized by: The armature is locked to the end of the push rod by a screw.

9. A relay comprising a magnetic circuit structure, characterized by: The magnetic circuit structure is the magnetic circuit structure of the relay according to any one of claims 1-8.

Images