Yoke assembly, electromagnetic assembly and electromagnetic relay

Abstract

The utility model discloses a yoke assembly, an electromagnetic assembly and an electromagnetic relay, the yoke assembly comprises a first yoke and a second yoke, and the side edge of the first yoke in a first direction is provided with a concave part with a first special-shaped matching surface; the side edge of the second yoke in the first direction is provided with a convex part which extends along a second direction and is provided with a second special-shaped matching surface, and the second direction is vertical to the first direction; the convex part is matched with the concave part in a concave-convex manner along a second direction and is riveted and fixed with the concave part; and the first yoke and the second yoke are fixed in the first direction through the action of the second special-shaped matching surface and the first special-shaped matching surface. The yoke assembly is accurate in installation and positioning, and the installation steps are simplified.

Description

Technical Field

[0001] The utility model relates to the field of relays, in particular to a yoke assembly, an electromagnetic assembly and an electromagnetic relay. Background Art

[0002] Currently, the yoke of a relay or electromagnet's magnetic circuit is often designed as two separate structures due to the need to install internal components. The two yoke components have different shapes, such as one U-shaped and the other flat, and are fixed together using rivets. A common fixing scheme is to provide one yoke component with a rectangular protrusion and the other yoke component with a rectangular groove for matching riveting. When using this shape, the yoke components must be fixed vertically and laterally by squeezing and riveting above the mating surfaces of the groove and protrusion to achieve horizontal and vertical positioning between the yoke components. This structure results in imprecise positioning before riveting and a complex riveting scheme. Utility Model Content

[0003] The main purpose of the utility model is to overcome the defect of the inconvenience of installation of the existing yoke assembly, and to provide a yoke assembly, an electromagnetic assembly and an electromagnetic relay, which have accurate positioning and simplified installation steps.

[0004] A yoke assembly includes a first yoke and a second yoke, wherein the first yoke is provided with a recess having a first special-shaped mating surface on the side in the first direction; the second yoke is provided with a convex portion extending along a second direction and having a second special-shaped mating surface on the side in the first direction, and the second direction is perpendicular to the first direction; the convex portion is inserted into the recess along the second direction and riveted to fix, and the first yoke and the second yoke are fixed in the first direction through the action of the second special-shaped mating surface and the first special-shaped mating surface.

[0005] Furthermore, the first special-shaped mating surfaces are respectively provided on two opposite sides of the recess, and the first special-shaped mating surfaces extend toward each other from the inside to the outside along the first direction; the second special-shaped mating surfaces are respectively provided on two opposite sides of the protrusion, and the second special-shaped mating surfaces extend toward each other from the outside to the inside along the first direction.

[0006] Furthermore, the recessed portion is continuous in the second direction, and the size of the protruding portion in the second direction is greater than or equal to the size of the recessed portion in the second direction to facilitate riveting and fixing.

[0007] Furthermore, the concave portion is continuous in the second direction and has an opening on the outer side in the first direction. The size of the convex portion in the first direction is smaller than or equal to the size of the concave portion in the first direction.

[0008] Furthermore, the first special-shaped mating surface and the second special-shaped mating surface are inclined surfaces, or the first special-shaped mating surface and the second special-shaped mating surface are arcuate surfaces.

[0009] An electromagnetic component includes an iron core component, a coil and a coil frame, wherein the coil frame is provided with a through hole, the coil is wound around the outside of the coil frame, and the iron core component is passed through the through hole; and also includes the above-mentioned yoke assembly, wherein the first yoke and the second yoke form an accommodating cavity, the coil frame is fixed in the accommodating cavity and the through hole is arranged along the second direction.

[0010] Furthermore, both sides of the coil frame in the second direction are fixed to the first yoke and the second yoke respectively; the first yoke and the second yoke are respectively provided with a first clearance hole and a second clearance hole for the core assembly to pass through.

[0011] Furthermore, two opposite sides of the second yoke are respectively provided with bent portions, the bent portions extend along the second direction and are provided with the convex portion on a side opposite to the first yoke.

[0012] An electromagnetic relay comprises a housing and a contact system; the housing is provided with a first cavity and a second cavity; the contact system is located in the first cavity; and the relay is characterized in that it also includes the above-mentioned electromagnetic component, the electromagnetic component is located in the second cavity, the second cavity is provided with a mounting post extending along a second direction, and the side of the first yoke in the first direction is provided with a protrusion, and the protrusion is connected to the mounting post.

[0013] Furthermore, the iron core assembly includes a moving iron core, a static iron core, an elastic member and a rod body; the static iron core is fixed relative to the coil frame and is located on the side of the coil frame close to the contact system, and the moving iron core can move along the second direction relative to the static iron core; the rod body is fixed relative to the moving iron core and passes through the moving iron core and the static iron core, and the end of the rod body is inserted into the first cavity opposite to the contact system; the elastic member is arranged outside the rod body and is located between the moving iron core and the static iron core.

[0014] From the above description of the utility model, it can be seen that compared with the prior art, the utility model has the following beneficial effects:

[0015] 1. In the present invention, a concave portion having a first special-shaped mating surface is provided on the first yoke; a convex portion having a second special-shaped mating surface is provided on the second yoke, and the convex portion is mated with the concave portion along the second direction and fixed by riveting. The first special-shaped mating surface and the second special-shaped mating surface are used to realize installation limitation in the first direction, thereby simplifying the installation steps.

[0016] 2. In the present invention, the first special-shaped mating surface extends from the inside to the outside along the first direction, and the second special-shaped mating surface extends from the outside to the inside along the first direction. The first special-shaped surface and the second special-shaped surface can be inclined surfaces or arc surfaces, etc., and can be set according to actual needs.

[0017] 3. In the present invention, the size of the convex portion in the second direction is greater than or equal to the size of the concave portion in the second direction, so that after the convex portion is inserted into the concave portion, it still protrudes outward from the convex portion in the second direction, ensuring that riveting operation can be performed in the second direction.

[0018] 4. In the present invention, the recess is through in the second direction and has an opening on the outside in the first direction. The size of the protrusion in the first direction is less than or equal to the size of the recess in the first direction. Riveting is not required in the first direction, and positioning is achieved by the cooperation of the first special-shaped mating surface and the second special-shaped mating surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the yoke assembly of the utility model;

[0020] Figure 2 This is the structural diagram of the first yoke;

[0021] Figure 3 This is the structural diagram of the second yoke;

[0022] Figure 4 It is a diagram of the matching structure of the first yoke and the second yoke;

[0023] Figure 5 This is a structural diagram of the electromagnetic component of the utility model;

[0024] Figure 6 This is the structural diagram of the electromagnetic relay of the utility model;

[0025] in:

[0026] 10. First yoke; 11. Recess; 13. First special-shaped mating surface; 14. Opening; 15. First clearance hole; 20. Second yoke; 22. Protrusion; 23. Second special-shaped mating surface; 25. Bend; 26. Bump; 27. Second clearance hole; 28. Accommodation cavity; 30. Core assembly; 31. Coil; 32. Coil frame; 33. Through hole; 34. Moving core; 35. Stationary core; 36. Elastic member; 37. Rod; 40. Housing; 41. First cavity; 42. Second cavity; 43. Mounting column; 50. Contact system. DETAILED DESCRIPTION

[0027] The present invention is further described below through specific implementation methods.

[0028] See also Figures 1 to 3A yoke assembly includes a first yoke 10 and a second yoke 20. The shapes of the first yoke 10 and the second yoke 20 may be the same or different. The first yoke 10 is provided with a recess 11 having a first special-shaped mating surface 13 on the side in the first direction, and the second yoke is provided with a protrusion 22 extending in a second direction and having a second special-shaped mating surface 23 on the side in the first direction. The second direction is perpendicular to the first direction. The first direction can be the length direction or the width direction, etc., and the second direction can be the thickness direction of the first yoke 10 or the second yoke 20. That is, the position of the recess 11 on the first yoke 10 corresponds to the position of the protrusion 22 on the second yoke 20, and the number is also corresponding. The first yoke 10 and the second yoke 20 can be fixed by inserting the protrusion 22 into the recess 11 along the second direction and riveting them together. In the first direction, fixation is achieved by the interaction of the second special-shaped mating surface 23 with the first special-shaped mating surface 13, without the need for re-riveting.

[0029] In this embodiment, the convex portion 22 and the concave portion 11 on the first yoke 10 and the second yoke 20 can also be swapped, that is, the first yoke 10 is provided with a convex portion 22 having a second special-shaped mating surface 23, and the second yoke 20 is provided with a concave portion 11 having a first special-shaped mating surface 13, so that the concave portion 11 and the convex portion 22 can be matched with each other.

[0030] Specifically, the recess 11 can be an inwardly concave structure in the first direction, that is, it is concave from the outside along the first direction toward the center of the first yoke 10. The two opposing side surfaces of the recess 11 are respectively configured as first special-shaped mating surfaces 13 extending from the inside to the outside in the first direction. The first special-shaped mating surfaces 13 can be inclined surfaces or curved surfaces. In the figure, an inclined surface is used as an example, and the first special-shaped mating surfaces 13 extend obliquely from the inside to the outside in the first direction. The first yoke 10 is provided with recesses 11 on both sides in the first direction, and the number of recesses 11 on both sides can be the same or different.

[0031] The number of recesses 11 on the side of the first yoke 10 can be set according to the size of the first yoke 10 in the third direction, which can be the width direction or the length direction, which is perpendicular to the first direction or the second direction. The interval between two adjacent recesses 11 is not limited.

[0032] The second yoke 20 has protrusions 22 extending in the second direction on both sides of the first direction. Second shaped mating surfaces 23 are provided on both sides of the protrusions 22. The second shaped mating surfaces 23 extend from the inside to the outside in the first direction and may be inclined or curved surfaces, for example. The figure uses an inclined surface as an example. The structures of the two sides of the second yoke 20 in the first direction can be the same or different, and can correspond to the structures of the two sides of the first yoke 10 in the first direction. After the protrusion 22 is inserted into the corresponding side recess 11 in the second direction, the second shaped mating surface 23 of the protrusion 22 contacts the first shaped mating surface 13 of the recess 11, limiting the protrusion 22 and the recess 11 in the first direction.

[0033] In this embodiment, the recess 11 penetrates in the second direction, so that the convex portion 22 can be inserted along the second direction. The dimension of the convex portion 22 in the second direction is greater than or equal to the dimension of the recess 11 in the second direction. After the convex portion 22 is inserted into the recess 11, it protrudes outward from the recess 11 in the second direction for easy riveting.

[0034] Furthermore, an opening 14 is provided on the outer side of the recess 11 in the first direction. Due to the existence of the first non - regular mating surface 13, in the third direction, the dimension of the opening 14 is smaller than the dimension of the inner side of the recess 11 opposite to the opening 14. Taking the inclined plane in the figure as an example, the shape of the recess 11 is similar to a trapezoid or a triangle. The recess 11 may not be provided with the opening 14, that is, the outer side of the recess 11 in the first direction is closed, and the recess 11 only penetrates in the second direction.

[0035] In this embodiment, since in the first direction, the limit between the convex portion 22 and the recess 11 is achieved through the first non - regular mating surface 13 and the second non - regular mating surface 23, no riveting operation is required in the first direction. The dimension of the convex portion 22 in the first direction can also be set to be less than or equal to the dimension of the recess 11 in the first direction. In the figure, the outer side of the convex portion 22 in the first direction is set to be flush with the opening 14.

[0036] When installing the yoke iron assembly of this embodiment, after aligning the convex portion 22 on the side of the second yoke iron 20 with the recess 11 on the corresponding side of the first yoke iron 10, insert it from bottom to top so that the convex portion 22 is inserted into the recess 11, and then rivet the convex portion 22 in the second direction, for example, using common riveting methods such as split riveting.

[0037] Based on this, referring to Figure 5 , this embodiment also proposes an electromagnetic assembly, including an iron core assembly 30, a coil 31, a coil bobbin 32, and the above - mentioned yoke iron assembly. A through - hole 33 is provided in the middle of the coil bobbin 32, the coil 31 is wound around the outer periphery of the coil bobbin 32, and the iron core assembly 30 is inserted through the through - hole 33 of the coil bobbin 32.

[0038] In the yoke iron assembly, the first yoke iron 10 is set in a flat plate shape, and bending portions 25 are respectively provided on two opposite sides of the second yoke iron 20, that is, the second yoke iron 20 is similar to a U - shape. The bending portions 25 extend along the second direction and a convex portion 22 is provided on the side opposite to the first yoke iron 10, and riveting fixation is achieved through the convex portion 22 and the recess 11. An accommodation cavity 28 is formed between the first yoke iron 10 and the second yoke iron 20, and the accommodation cavity 28 penetrates in the third direction. In this embodiment, the structures of the first yoke iron 10 and the second yoke iron 20 can also be swapped. For example, the second yoke iron 20 is set in a flat plate shape and the first yoke iron 10 is similar to a U - shape. In practical applications, the shapes of the first yoke iron 10 and the second yoke iron 20 are not limited to this, and they can also be other shapes.

[0039] The coil bobbin 32 is fixed within the accommodating cavity 28, and its through-holes 33 are arranged along the second direction. Specifically, the two sides of the coil bobbin 32 in the second direction are respectively fixed to the first yoke 10 and the second yoke 20. The first yoke 10 and the second yoke 20 are respectively provided with first and second clearance holes 15 and 27 at positions relative to the through-holes 33 of the coil bobbin 32, for allowing the core assembly 30 to pass through. The yoke assembly is provided to guide the magnetic field generated by the coil 31 when it is energized and to enhance the strength of the magnetic field.

[0040] In this embodiment, see Figure 4-Figure 6 , also proposed an electromagnetic relay, comprising a housing 40, a contact system, and the aforementioned electromagnetic assembly. Housing 40 is provided with a first cavity 41 and a second cavity 42. The contact system, located in first cavity 41, is used to perform operations such as opening and closing contacts. The contact system can be implemented using a conventional structure, and the specific structure is not limited thereto. The electromagnetic assembly, located in second cavity 42, is used to control the operation of the contact system.

[0041] The second cavity 42 is provided with mounting posts extending in the second direction. The first yoke 10 is provided with protrusions 26 on the sides in the first direction. The protrusions 26 are fixedly connected to the mounting posts 43 by screws, thereby securing the yoke assembly within the second cavity 42. The first yoke 10 is provided with protrusions 26 on both sides in the first direction, and two mounting posts 43 are correspondingly provided in the second cavity 42. The two mounting posts 43 are located on both sides of the yoke assembly and are at the same height as the yoke assembly.

[0042] The core assembly 30 includes a moving core 34, a stationary core 35, an elastic member 36, and a rod 37. The stationary core 35 is fixed relative to the coil frame 32 and is located on the side of the coil frame 32 close to the contact system. The moving core 34 can move relative to the stationary core 35 in a second direction. The rod 37 is fixed relative to the moving core 34 and passes through the moving core 34 and the stationary core 35. The end of the rod 37 is inserted into the first cavity 41, opposite the contact system. The rod 37 can be moved by the moving core 34, and the movement of the contact system is controlled by the movement of the rod 37. The elastic member 36 is mounted on the outside of the rod 37 and is located between the moving core 34 and the stationary core 35. The structure of the core assembly 30 is not limited to this, and other common structures can also be used.

[0043] The terms "first" and "second" appearing in the present invention are only for the convenience of description to distinguish different components with the same name, and do not indicate a sequence or primary and secondary relationship.

[0044] In the description of the present invention, the directions or positional relationships indicated by “up”, “down”, “left”, “right”, “front” and “back” are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention. They do not indicate or imply that the device referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0045] In this application, unless otherwise specified, "plurality" refers to two or more. "And / or" describes a relationship between related objects, indicating that three possible relationships exist. For example, "A and / or B" can mean: A exists alone, A and B exist simultaneously, or B exists alone. The character " / " generally indicates that the related objects are in an "or" relationship.

[0046] The above is only a specific implementation method of the present invention, but the design concept of the present invention is not limited to this. Any non-substantial changes to the present invention using this concept shall be deemed as an infringement of the protection scope of the present invention.

Claims

1. A yoke assembly comprising a first yoke and a second yoke, characterized in that: A recess having a first special-shaped mating surface is provided on the side of the first yoke in the first direction; a convex portion extending along a second direction and having a second special-shaped mating surface is provided on the side of the second yoke in the first direction, and the second direction is perpendicular to the first direction; the convex portion is inserted into the recess along the second direction and riveted to fix, and the first yoke and the second yoke are fixed in the first direction through the action of the second special-shaped mating surface and the first special-shaped mating surface.

2. A yoke assembly according to claim 1, characterized in that: The first special-shaped mating surfaces are respectively provided on two opposite sides of the recess, and the first special-shaped mating surfaces extend toward each other from inside to outside along the first direction; the second special-shaped mating surfaces are respectively provided on two opposite sides of the protrusion, and the second special-shaped mating surfaces extend toward each other from outside to inside along the first direction.

3. A yoke assembly according to claim 1, characterized in that: The recessed portion is continuous in the second direction, and a dimension of the protruding portion in the second direction is greater than or equal to a dimension of the recessed portion in the second direction to facilitate riveting and fixing.

4. A yoke assembly according to claim 1, characterized in that: The concave portion is continuous in the second direction and has an opening on the outer side in the first direction. The dimension of the convex portion in the first direction is smaller than or equal to the dimension of the concave portion in the first direction.

5. A yoke assembly according to claim 1, characterized in that: The first special-shaped mating surface and the second special-shaped mating surface are inclined surfaces, or the first special-shaped mating surface and the second special-shaped mating surface are arcuate surfaces.

6. An electromagnetic assembly comprising an iron core assembly, a coil, and a coil frame, wherein the coil frame is provided with a through hole, the coil is wound around the outside of the coil frame, and the iron core assembly is passed through the through hole; characterized in that: It also includes a yoke assembly according to any one of claims 1 to 5, wherein the first yoke and the second yoke form an accommodating cavity, the coil frame is fixed in the accommodating cavity, and the through hole is arranged along the second direction.

7. The electromagnetic assembly according to claim 6, wherein: Both sides of the coil frame in the second direction are fixed to the first yoke and the second yoke respectively; the first yoke and the second yoke are respectively provided with a first clearance hole and a second clearance hole for the core assembly to pass through.

8. The electromagnetic assembly according to claim 6, wherein: Two opposite sides of the second yoke are respectively provided with bending portions, the bending portions extending along the second direction and provided with the convex portion on a side opposite to the first yoke.

9. An electromagnetic relay comprising a housing and a contact system; the housing is provided with a first cavity and a second cavity; the contact system is located in the first cavity; and characterized in that: It also includes an electromagnetic component as described in claims 6-8, wherein the electromagnetic component is located in the second cavity, the second cavity is provided with a mounting column extending along the second direction, and the side of the first yoke in the first direction is provided with a protrusion, and the protrusion is connected to the mounting column.

10. The electromagnetic relay according to claim 9, wherein: The iron core assembly includes a moving iron core, a static iron core, an elastic member and a rod body; the static iron core is fixed relative to the coil frame and is located on the side of the coil frame close to the contact system, and the moving iron core can move relative to the static iron core along the second direction; the rod body is fixed relative to the moving iron core and passes through the moving iron core and the static iron core, and the end of the rod body is inserted into the first cavity opposite to the contact system; the elastic member is arranged outside the rod body and is located between the moving iron core and the static iron core.

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