Fixing device of coil assembly, electromagnetic assembly and electromagnetic relay

Abstract

The utility model discloses a fixing device of a coil assembly, an electromagnetic assembly and an electromagnetic relay. The fixing device comprises a yoke and the coil assembly, the yoke is provided with a containing cavity, the coil assembly comprises a coil and a framework, fixing plates extending in the radial direction are arranged on the two sides of the framework in the axial direction respectively, a wire groove is formed between the framework and the two fixing plates, the coil is wound around the wire groove, the framework is further provided with through holes extending in the axial direction and penetrating through the fixing plates, and the coil is wound around the through holes. The framework is located in the containing cavity, a positioning structure is arranged between at least one fixing plate and the corresponding side wall of the containing cavity, and an interference structure is arranged on the corresponding side wall of at least one fixing plate and the corresponding side wall of the containing cavity. According to the utility model, the fixation between the yoke and the coil assembly is more stable, and shaking is avoided.

Description

Technical Field

[0001] The utility model relates to the field of relays, in particular to a fixing device for a coil group, an electromagnetic component and an electromagnetic relay. Background Art

[0002] The coil is a key component of the electromagnetic mechanism in a relay. Currently, for special-shaped yoke structures that utilize two riveted yokes, the assembly gap between the coil assembly's frame and the yokes often needs to be designed larger to facilitate the vertical riveting and securing of the yokes. Typically, the yokes and coil assembly are horizontally positioned using locating tabs and locating holes in the yokes. However, this vertical gap between the coil and the yokes can easily cause the coil assembly to move up and down.

[0003] In addition, the current coil skeletons are generally smooth cylindrical, and there is a phenomenon that the enameled wire slides relative to the skeleton. When the external connection of the coil is fixed to the outside, the up and down movement of the coil components or the sliding of the enameled wire itself relative to the skeleton will pull on the wiring parts, thereby causing risks such as breakage. Utility Model Content

[0004] The main purpose of the utility model is to overcome the defects of the existing fixing structure between the coil and the yoke, and to provide a fixing device for the coil group, an electromagnetic assembly and an electromagnetic relay to ensure that the fixation between the yoke and the coil group is more stable and avoid shaking.

[0005] The utility model adopts the following technical solutions:

[0006] A fixing device for a coil group, comprising a yoke and a coil group; the yoke is provided with a accommodating cavity, the coil group comprises a coil and a skeleton, radially extending fixing plates are respectively provided on both sides of the axial direction of the skeleton, a wire groove is formed between the skeleton and the two fixing plates, the coil is wound in the wire groove, the skeleton is also provided with an axially extending through-hole passing through the fixing plate, and is characterized in that: the skeleton is located in the accommodating cavity, a positioning structure is provided between at least one of the fixing plates and the corresponding side wall of the accommodating cavity, and at least one of the fixing plates and the corresponding side wall of the accommodating cavity are provided with an interference structure.

[0007] Furthermore, the positioning structure includes a positioning bristle and a clearance hole, and positioning is achieved through the concave-convex cooperation between the positioning bristle and the clearance hole.

[0008] Furthermore, the positioning bung is formed on a side of the fixing plate opposite to the side wall of the accommodating cavity, and the clearance hole is formed on the side wall of the accommodating cavity opposite to the fixing plate; or the clearance hole is formed on a side of the fixing plate opposite to the side wall of the accommodating cavity, and the positioning bung is formed on the side wall of the accommodating cavity opposite to the fixing plate.

[0009] Furthermore, the positioning structure includes a plurality of positioning buds and a plurality of relief holes, wherein the plurality of positioning buds are distributed at intervals along the circumference of the through hole, and the plurality of relief holes are distributed at intervals along the circumference of the through hole.

[0010] Furthermore, the interference structure includes a convex bulge, which is formed on a side of the fixing plate opposite to the side wall corresponding to the accommodating cavity, or the convex bulge is formed on the side wall of the accommodating cavity opposite to the fixing plate.

[0011] Furthermore, the interference structure includes a plurality of convex buds, and the plurality of convex buds are distributed at intervals along the circumference of the through hole.

[0012] Furthermore, the outer periphery of the frame is provided with convex ribs, which extend along the axial direction of the frame and protrude outward along the radial direction of the frame.

[0013] Furthermore, the yoke includes a first yoke and a second yoke, and two opposite sides of the second yoke are respectively provided with bending parts, and the bending parts extend axially along the skeleton and are fixed to two opposite sides of the first yoke to form the accommodating cavity.

[0014] An electromagnetic component includes an iron core component, characterized in that it also includes a fixing device for the coil group, and the iron core component is inserted into the through hole.

[0015] 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 an electromagnetic component is also included, which is located in the second cavity.

[0016] 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:

[0017] 1. In the present invention, a positioning structure is provided between the fixed plate of the frame and the corresponding side wall of the accommodating cavity of the yoke to achieve positioning in the axial direction perpendicular to the frame. An interference fit is also provided between the fixed plate of the frame and the corresponding side wall of the accommodating cavity to achieve a tight fit in the axial direction of the frame, thereby ensuring a more stable connection between the frame and the yoke and avoiding shaking.

[0018] 2. In the present invention, convex ribs are further provided on the outer periphery of the frame, which can effectively prevent the coil from sliding with the frame, further making the fixation between the coil assembly and the yoke more reliable and reducing the risk of wire breakage.

[0019] 3. In the present invention, the positioning structure includes a positioning bud and a positioning hole, and positioning is achieved through the concave-convex cooperation of the two. The surplus structure adopts a convex bud, which does not affect the assembly of the yoke iron, has a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a diagram showing the coordination between the frame and the yoke of the present invention;

[0021] Figure 2 Skeleton structure Figure 1 ;

[0022] Figure 3 Skeleton structure Figure 2 ;

[0023] Figure 4 This is a structural diagram of the electromagnetic component;

[0024] Figure 5 for Figure 4 sectional view of

[0025] Figure 6 It is a cross-sectional view of the electromagnetic relay structure;

[0026] in:

[0027] 10. Yoke; 11. Accommodating cavity; 12. First yoke; 13. Second yoke; 14. Bending portion; 15. Protrusion; 20. Coil assembly; 21. Coil; 22. Skeleton; 23. Fixing plate; 24. Wire groove; 25. Through hole; 26. Raised rib; 30. Positioning structure; 31. Positioning baffle; 32. Clearance hole; 40. Interference structure; 41. Raised baffle; 50. Core assembly; 51. Moving core; 52. Stationary core; 53. Elastic member; 54. Rod; 60. Housing; 61. First cavity; 62. Second cavity; 63. Mounting column; 70. Contact system. DETAILED DESCRIPTION

[0028] The present invention is further described below through specific implementation methods.

[0029] See also Figures 1 to 3A device for fixing a coil assembly includes a yoke 10 and a coil assembly 20. The yoke 10 is provided with a receiving cavity 11, two opposite sides of which are through-holes. The coil assembly 20 includes a coil 21 and a skeleton 22. Radially extending fixing plates 23 are provided on both sides of the skeleton 22 in the axial direction. A wire groove 24 is formed between the skeleton 22 and the two fixing plates 23, and the coil 21 is wound in the wire groove 24. The skeleton 22 is also provided with a through hole 25 that extends axially and passes through the fixing plate 23, that is, the two ends of the through hole 25 in the axial direction are respectively formed on the fixing plate 23. The skeleton 22 is located in the receiving cavity 11, and the two fixing plates 23 of the skeleton 22 correspond to two opposite side walls of the receiving cavity 11 respectively. A positioning structure 30 is provided between at least one fixing plate 23 and the corresponding side wall of the receiving cavity 11, and the positioning structure 30 is used to realize the positioning of the skeleton 22 and the yoke 10 in the axial direction of the vertical skeleton 22. At least one fixing plate 23 and the corresponding side wall of the accommodating cavity 11 are provided with an interference structure 40 , and the interference structure 40 realizes a tight fit between the frame 22 and the yoke 10 , thereby achieving axial fixation of the frame 22 and the yoke 10 .

[0030] Among them, the positioning structure 30 includes a positioning bung 31 and a clearance hole 32, and positioning is achieved by the concave-convex cooperation between the positioning bung 31 and the clearance hole 32. The positioning bung 31 is formed on the side of the fixed plate 23 corresponding to the side wall of the accommodating cavity 11, that is, the positioning bung 31 is a structure that convexly projects on the surface of the fixed plate 23. The clearance hole 32 is formed on the side wall of the accommodating cavity 11 relative to the fixed plate 23, and the clearance hole 32 is a structure that is concave in the side wall of the accommodating cavity 11. The shapes and sizes of the positioning bung 31 and the clearance hole 32 are adapted. In actual application, the positions of the positioning bung 31 and the clearance hole 32 can also be swapped, that is, the clearance hole 32 is formed on the side of the fixed plate 23 corresponding to the accommodating cavity 11, and the positioning bung 31 is formed on the side wall of the accommodating cavity 11 relative to the fixed plate 23.

[0031] In this embodiment, the positioning structure 30 includes a plurality of positioning baffles 31 and a plurality of clearance holes 32. The plurality of positioning baffles 31 are spaced apart circumferentially along the through hole 25, and the plurality of clearance holes 32 are spaced apart circumferentially along the through hole 25. The number of positioning baffles 31 can be one, two, three, or even more, with four being used as an example in the figure. The number of clearance holes 32 can be the same as or different from the number of positioning baffles 31, and the distribution of the positioning baffles 31 can be the same as or different from the distribution of the clearance holes 32, so as to ensure that each positioning baffle 31 has a corresponding clearance hole 32 for concave-convex fit.

[0032] The interference structure 40 includes a protrusion 41 formed on the side of the fixing plate 23 that faces the corresponding sidewall of the accommodating cavity 11. The protrusion 41 protrudes outward from the surface of the fixing plate 23. Alternatively, the protrusion 41 can be formed on the sidewall of the accommodating cavity 11 that faces the fixing plate 23. The protrusion 41 protrudes outward from the sidewall of the accommodating cavity 11. In practical applications, the diameter of the protrusion is less than 3 mm and the height is less than 0.5 mm, but the present invention is not limited to these.

[0033] In this embodiment, the interference structure 40 includes a plurality of convex buds 41, which are spaced apart along the circumference of the through hole 25. The number of the convex buds 41 can be one, two, three or even more, with three being used as an example in the figure.

[0034] The distribution of the positioning structure 30 and the interference structure 40 can be various. For example, the positioning structure 30 and the interference structure 40 are respectively located on the two fixed plates 23 of the skeleton 22, or the positioning structure 30 and the interference structure 40 are arranged on the same fixed plate 23, or one of the fixed plates 23 is provided with the positioning structure 30 and the interference structure 40, and the other fixed plate 23 is provided with the positioning structure 30 or the interference structure 40, etc.

[0035] The main body of the frame 22 is cylindrical. To prevent the coil 21 from circumferentially sliding relative to the frame 22, ribs 26 are provided on the outer periphery of the frame 22. The ribs 26 extend axially along the frame 22 and protrude radially outward. The ribs 26 can be chamfered to provide a smoother surface. The number of ribs 26 can be at least one, depending on the requirements. The figure shows one rib as an example.

[0036] In this embodiment, the yoke 10 is an integrally formed structure or a split structure. In this embodiment, the split structure is used as an example, and includes a first yoke 12 and a second yoke 13. The first yoke 12 is flat, and the two opposite sides of the second yoke 13 are respectively provided with bent portions 14. The bent portions 14 extend axially along the skeleton 22, that is, the second yoke 13 is similar to a U-shape. The two bent portions 14 of the second yoke 13 are fixed to the two opposite sides of the first yoke 12 to form the accommodating cavity 11. The first yoke 12 and the second yoke 13 can be fixed by riveting. The first yoke 12 and the second yoke 13 are also provided with holes corresponding to the through holes 25 on the skeleton 22.

[0037] During installation, the coil group 20 is placed in the accommodating cavity 11 of the yoke 10, and the two fixing plates 23 of the skeleton 22 are opposite to the first yoke 12 and the second yoke 13 respectively. The positioning structure 30 between the fixing plate 23 and the accommodating cavity 11 is matched with each other to achieve positioning in the axial direction perpendicular to the skeleton 22, and then the connection between the first yoke 12 and the second yoke 13 is riveted. At the same time, due to the interference structure 40 between the fixing plate 23 and the accommodating cavity 11, the bulge 41 is flattened and the skeleton 22 and the yoke 10 are tightly matched, thereby achieving fixation in the axial direction of the skeleton 22 and avoiding shaking.

[0038] Based on this, this embodiment also proposes an electromagnetic component, see Figure 4 , including a core component 50 and a fixing device for the coil group 20, the core component 50 is passed through the through hole 25, and the two ends of the core component 50 in the axial direction pass through the two fixing plates 23.

[0039] See also Figure 5 、 Figure 6 An electromagnetic relay includes a housing 60, a contact system 70, and one of the aforementioned electromagnetic components. Housing 60 is provided with a first cavity 61 and a second cavity 62. Contact system 70, located in first cavity 61, is used to perform operations such as opening and closing contacts. Contact system 70 can be implemented using a conventional structure, and the specific structure is not limited thereto. The electromagnetic component, located in second cavity 6242, is used to control the operation of contact system 70.

[0040] The second cavity 62 is provided with a mounting column 63 extending along the axial direction of the frame 22 , and a protrusion 15 is provided on the side of the first yoke 12 . The protrusion 15 is connected to the mounting column 63 by screws for power supply, thereby fixing the yoke 10 in the second cavity 62 .

[0041] In this embodiment, the core assembly 50 includes a moving core 51, a stationary core 52, an elastic member 53, and a rod 54. The stationary core 52 is fixed relative to the frame 22 and is located on the side of the frame 22 near the contact system 70. The moving core 51 can move relative to the stationary core 52 along the axial direction of the frame 22. The rod 54 is fixed relative to the moving core 51 and passes through the moving core 51 and the stationary core 52. The end of the rod 54 is inserted into the first cavity 61 and faces the contact system 70. The rod 54 can be moved by the moving core 51, and the movement of the contact system 70 is controlled by the movement of the rod 54. The elastic member 53 is disposed outside the rod 54 and is located between the moving core 51 and the stationary core 52 of the rod 54. The structure of the core assembly 50 is not limited to this, and other common structures can also be used.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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 device for fixing a coil assembly, comprising a yoke and a coil assembly; the yoke having a receiving cavity, the coil assembly comprising a coil and a frame, radially extending fixing plates being provided on either side of the frame in the axial direction, a wire slot being formed between the frame and the fixing plates, the coil being wound in the wire slot, the frame further having an axially extending through-hole extending through the fixing plates, characterized in that: The frame is located in the accommodating cavity, a positioning structure is provided between at least one of the fixing plates and a corresponding side wall of the accommodating cavity, and an interference structure is provided between at least one of the fixing plates and a corresponding side wall of the accommodating cavity.

2. A coil assembly fixing device according to claim 1, characterized in that: The positioning structure includes a positioning bristle and a clearance hole, and positioning is achieved through the concave-convex cooperation between the positioning bristle and the clearance hole.

3. A coil assembly fixing device according to claim 2, characterized in that: The positioning bung is formed on a side of the fixing plate opposite to the corresponding side wall of the accommodating cavity, and the clearance hole is formed on the side wall of the accommodating cavity opposite to the fixing plate; or the clearance hole is formed on a side of the fixing plate opposite to the corresponding side wall of the accommodating cavity, and the positioning bung is formed on the side wall of the accommodating cavity opposite to the fixing plate.

4. A coil assembly fixing device according to claim 2, characterized in that: The positioning structure includes a plurality of positioning buds and a plurality of relief holes. The plurality of positioning buds are distributed at intervals along the circumference of the through hole, and the plurality of relief holes are distributed at intervals along the circumference of the through hole.

5. The coil assembly fixing device according to claim 1, wherein: The interference structure includes a convex bulge, which is formed on a side of the fixing plate opposite to the corresponding side wall of the accommodating cavity, or the convex bulge is formed on the side wall of the accommodating cavity opposite to the fixing plate.

6. A coil assembly fixing device according to claim 5, characterized in that: The interference structure includes a plurality of convex buds, and the plurality of convex buds are distributed at intervals along the circumference of the through hole.

7. The coil assembly fixing device according to claim 1, characterized in that: The outer periphery of the frame is further provided with convex ribs, which extend along the axial direction of the frame and protrude outward along the radial direction of the frame.

8. The coil assembly fixing device according to claim 1, wherein: The yoke includes a first yoke and a second yoke, and two opposite sides of the second yoke are respectively provided with bending parts. The bending parts extend along the axial direction of the frame and are fixed to the two opposite sides of the first yoke to form the accommodating cavity.

9. An electromagnetic assembly, comprising an iron core assembly, characterized in that: It also includes the coil assembly fixing device according to any one of claims 1 to 8, and the core assembly is passed through the through hole.

10. 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; characterized in that: It also includes the electromagnetic assembly according to claim 9, wherein the electromagnetic assembly is located in the second cavity.

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