CONNECTION STRUCTURE FOR MAGNETIC YELLOW AND IRON CORE, COIL ASSEMBLY AND RELAY
Patent Information
- Application Number
- VN1202602748
- Authority / Receiving Office
- VN · VN
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2023-09-26
- Filing Date
- 2024-09-23
- Publication Date
- 2026-07-15
AI Technical Summary
The iron core and the yoke are riveted in the existing coil assembly, resulting in magnetic leakage problems at the riveted position at the end of the iron core, affecting the magnetic circuit conduction efficiency.
By providing corresponding protruding and concave hole structures on the yoke and the iron core, the connection is carried out by male-female plugging, and the use of riveting is avoided.
This connection structure improves assembly efficiency, avoids the problem of the iron core bending due to excessive pressure during riveting, and effectively reduces magnetic leakage and improves the efficiency of the magnetic field circulating in the magnetic circuit.
Smart Images
Figure VN1202602748_0
Abstract
Description
Yoke and iron core connection structure, coil assembly and relay
[0001] This disclosure claims priority to Chinese patent application No. 202311251204.8 filed on September 26, 2023, the entire contents of which are incorporated herein by reference. Technical Field
[0002] The present disclosure relates to the technical field of relays, and in particular to a connection structure between a yoke and an iron core, a coil assembly, and a relay. Background Art
[0003] Chinese document CN115440539A (application date: March 29, 2022) discloses a magnetic latching relay. In this technical solution, a yoke is connected to each end of the iron core, and the yoke and the end of the iron core are fastened by riveting. As shown in Figures 11 and 12, a coil assembly of the prior art is provided, in which the iron core and the yoke are fastened together by riveting. During the assembly of the coil assembly, riveting tools and equipment are required for riveting. Although the riveting process is easy to automate, a large pressing force is required to achieve stable riveting and ensure that the yoke and the iron core fit tightly together. During the extrusion process, the iron core in the coil assembly may bend, thereby affecting the tight fit between the iron core end and the yoke. More importantly, since the iron core end and the yoke are riveted, that is, the rivet column at the iron core end passes through the rivet hole on the yoke, magnetic leakage problems will occur at the riveted positions at both ends of the iron core during the use of the coil assembly. The magnetic leakage will affect the magnetic circuit conduction efficiency, and the most obvious impact on the relay is the operating voltage and reset voltage.
[0004] Summary of the Invention
[0005] In response to the shortcomings of the existing technology, the present disclosure provides a connection structure between a yoke and an iron core, which mainly solves the technical problem that the iron core and the yoke in the existing coil assembly are connected by riveting, resulting in leakage magnetic field at the riveted position of the iron core end.
[0006] To achieve the above objectives, the present disclosure is implemented through the following technical solutions:
[0007] A connection structure between a yoke and an iron core is used in a relay. The yoke and the iron core respectively have corresponding yoke assembly surfaces and iron core assembly ends. One of the yoke assembly surface and the iron core assembly end is provided with a protrusion, and the other is provided with a concave hole with a blind hole structure. The yoke and the iron core are connected together through the male and female plug-in interference fit of the protrusion and the concave hole.
[0008] According to one embodiment of the present disclosure, a recessed hole is provided on the yoke assembly surface, and a protrusion is provided on the end surface of the core assembly end.
[0009] According to one embodiment of the present disclosure, the protrusion is cylindrical, the protrusion is coaxially arranged with the iron core, and the diameter of the protrusion is smaller than the diameter of the iron core.
[0010] According to one embodiment of the present disclosure, the ratio of the diameter of the protrusion to the diameter of the core is 1 / 5 to 4 / 5.
[0011] According to one embodiment of the present disclosure, a protrusion is provided on the yoke assembly surface, and a recessed hole is opened on the end surface of the core assembly end.
[0012] According to one embodiment of the present disclosure, the protrusion is cylindrical, the concave hole is coaxially arranged with the iron core, and the ratio of the inner diameter of the concave hole to the outer diameter of the iron core is 1 / 4 to 3 / 4.
[0013] According to one embodiment of the present disclosure, the protrusion is a convex bud structure integrally formed on the yoke assembly surface by punching.
[0014] According to one embodiment of the present disclosure, the protruding length of the protrusion is adapted to the concave depth of the concave hole.
[0015] Based on the same inventive concept, the present disclosure also provides a coil assembly, including a coil frame, a conductive coil wound on the coil frame, an iron core passed through the coil frame, and two yokes respectively installed at the two ends of the coil frame. The two yokes are connected to the two ends of the iron core using any of the above-mentioned connection structures of the yoke and the iron core.
[0016] Based on the same inventive concept, the present disclosure also provides a relay, comprising the above-mentioned coil assembly.
[0017] The above technical solution has the following advantages or beneficial effects:
[0018] In the connection structure of the yoke and the iron core, the coil assembly and the relay disclosed in the present invention, the ends of the yoke and the iron core are connected by interference fit of male and female plug-in by mutually adapted protrusions and recessed holes, and the connection position is located on the inner side of the yoke assembly surface, that is, the end of the iron core does not penetrate the yoke like the existing riveted structure. In this way, on the one hand, the connection between the yoke and the iron core does not require the aid of special riveting tooling and equipment, and only a simple tightening operation is required to make the ends of the yoke and the iron core interference fit together, which is conducive to improving its assembly efficiency and improving the problem that the iron core is bent due to excessive riveting pressure during the riveting process, thereby affecting the close fit between the yoke and the iron core; on the other hand, since the connection position of the yoke and the iron core is located on the inner side of the yoke assembly surface, it can effectively improve the leakage magnetic field problem existing in the riveted position of the existing yoke and the iron core caused by riveting, and ensure that the magnetic field circulates inside the magnetic circuit as much as possible, which can be said to kill two birds with one stone. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The above and other features and advantages of the present disclosure will become more apparent by describing in detail example embodiments thereof with reference to the accompanying drawings.
[0020] FIG1 is a schematic diagram of the three-dimensional structure of a coil assembly according to a first embodiment of the present disclosure.
[0021] FIG2 is a cross-sectional view of the structure of the coil assembly according to the first embodiment of the present disclosure.
[0022] FIG3 is a schematic diagram of the three-dimensional structure of the yoke according to the first embodiment of the present disclosure.
[0023] FIG4 is a schematic diagram of the three-dimensional structure of the iron core according to the first embodiment of the present disclosure.
[0024] FIG5 is a magnetic field cloud diagram of the coil assembly according to the first embodiment of the present disclosure.
[0025] FIG6 is a schematic diagram of the three-dimensional structure of the coil assembly according to the second embodiment of the present disclosure.
[0026] FIG7 is a cross-sectional view of the structure of the coil assembly according to the second embodiment of the present disclosure.
[0027] FIG8 is a schematic diagram of the three-dimensional structure of the yoke according to the second embodiment of the present disclosure.
[0028] FIG9 is a schematic diagram of the three-dimensional structure of the iron core of the second embodiment of the present disclosure.
[0029] FIG10 is a magnetic field cloud diagram of the coil assembly according to the second embodiment of the present disclosure.
[0030] FIG. 11 is a cross-sectional view of the structure of a coil assembly in the prior art.
[0031] FIG. 12 is a magnetic field contour diagram of the coil assembly shown in FIG. 11 .
[0032] Explanation of reference numerals: 1. Yoke, 2. Iron core, 3. Protrusion, 4. Concave hole, 5. Coil skeleton, 6. Conductive coil, 11. Yoke assembly surface, 21. Iron core assembly end. DETAILED DESCRIPTION
[0033] The present disclosure will be further described below with reference to the accompanying drawings and embodiments.
[0034] In the description of the present disclosure, it should be understood that the terms "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present disclosure.
[0035] Example 1
[0036] Please refer to Figures 1 to 5. An embodiment of the present disclosure provides a connection structure between a yoke and an iron core, which is applied to a relay, including a yoke 1 and an iron core 2. The yoke 1 and the iron core 2 respectively have corresponding yoke assembly surfaces 11 and iron core assembly ends 21. A protrusion 3 is provided on one of the yoke assembly surface 11 and the iron core assembly end 21, and a concave hole 4 with a blind hole structure is provided on the other. The yoke 1 and the iron core 2 are connected together by the male and female plug-in interference fit of the protrusion 3 and the concave hole 4. It can be understood that in this embodiment, the ends of the yoke 1 and the core 2 are connected by interference fit of the mutually adapted protrusions 3 and recessed holes 4, and the connection position is located on the inner side of the yoke assembly surface 11, that is, the end of the core 2 does not penetrate the yoke 1 like the existing riveted structure. In this way, on the one hand, the connection between the yoke 1 and the core 2 does not require the aid of special riveting tooling and equipment. Only a simple tightening operation is required to make the ends of the yoke 1 and the core 2 interference fit together, which is conducive to improving its assembly efficiency and improving the problem that the core 2 is bent due to excessive riveting pressure during the riveting process, thereby affecting the close fit between the yoke 1 and the core 2; on the other hand, since the connection position of the yoke 1 and the core 2 is located on the inner side of the yoke assembly surface 11, it can effectively improve the leakage magnetic field problem existing in the riveted position of the existing yoke and the core due to riveting, and ensure that the magnetic field circulates inside the magnetic circuit as much as possible, which can be said to kill two birds with one stone.
[0037] Please refer to Figures 1 to 5, in which a preferred embodiment is provided with a recessed hole 4 on the yoke assembly surface 11, and a protrusion 3 for interference fit with the recessed hole 4 is provided on the end face of the core assembly end 21. The recessed hole 4 is a blind hole structure, and the protruding length of the protrusion 3 is adapted to the inner concave depth of the recessed hole 4.
[0038] Please refer to Figures 1 to 5. In one preferred embodiment, preferably, the protrusion 3 is cylindrical, the protrusion 3 is coaxially arranged with the iron core 2, and protrudes outward along the axial direction of the iron core 2, and the diameter of the protrusion 3 is smaller than the diameter of the iron core 2. In one embodiment, the ratio of the diameter of the protrusion 3 to the diameter of the iron core 2 is 1 / 5 to 4 / 5. However, those skilled in the art should understand that in other embodiments, the shape of the protrusion 3 is not limited to the specific embodiment disclosed in this embodiment, and can also be a polygonal columnar structure or a triangular columnar structure, etc. Correspondingly, the recessed hole 4 is a groove structure adapted to the protrusion 3, as long as the protrusion 3 can be tightly fitted with the recessed hole 4 through interference.
[0039] Please refer to Figures 1 to 5. An embodiment of the present disclosure also provides a coil assembly, including a coil frame 5, a conductive coil 6 wound on the coil frame 5, an iron core 2 passed through the coil frame 5, and two yokes 1 respectively installed at the two ends of the coil frame 5. The connection between the two yokes 1 and the two ends of the iron core 2 is connected using the connection structure of the yoke and the iron core of any of the above embodiments.
[0040] In addition, an embodiment of the present disclosure further provides a relay, comprising the above-mentioned coil assembly.
[0041] Example 2
[0042] Please refer to Figures 6 to 10. The difference between this embodiment and the first embodiment is that a protrusion 3 is provided on the yoke assembly surface 11, and a recessed hole 4 for interference fit with the protrusion 3 is provided on the end face of the core assembly end 21. Preferably, the protrusion 3 is cylindrical, the recessed hole 4 is coaxially arranged with the core 2, and the ratio of the inner diameter of the recessed hole 4 to the outer diameter of the core 2 is 1 / 4 to 3 / 4. However, it should be understood by those skilled in the art that in other embodiments, the shape of the protrusion 3 is not limited to the specific embodiment disclosed in this embodiment, and may also be a polygonal columnar structure or a triangular columnar structure, etc. Correspondingly, the recessed hole 4 is a groove structure adapted to the protrusion 3, as long as the protrusion 3 can be tightly fitted with the recessed hole 4 through interference fit.
[0043] Referring to Figures 6 to 10 , in one preferred embodiment, the protrusion 3 is a convex structure integrally formed on the yoke assembly surface 11 by punching. However, those skilled in the art will appreciate that in other embodiments, the protrusion 3 may also be formed on the yoke assembly surface 11 by other conventional methods, such as integral casting or other conventional methods.
[0044] Example 3
[0045] The difference between this embodiment and the first embodiment is that a recessed hole 4 is provided on the yoke assembly surface 11, and a protrusion 3 for interference fit with the recessed hole 4 is provided on the end face of the core assembly end 21, but the outer diameter of the protrusion 3 is the same as the outer diameter of the core 2, which is equivalent to the end of the core 2 being directly inserted into the recessed hole 4 of the yoke assembly surface 11 to achieve a tight fit.
[0046] The embodiments described above are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate from the spirit and scope of the technical solutions of the embodiments of the present disclosure. Therefore, all other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present disclosure.
Claims
1. A connection structure between a yoke and an iron core, used in a relay, characterized in that: The yoke (1) and the iron core (2) are respectively provided with a yoke assembly surface (11) and an iron core assembly end (21) which correspond to each other; a protrusion (3) is arranged on one of the yoke assembly surface (11) and the iron core assembly end (21); and a concave hole (4) with a blind hole structure is arranged on the other; the yoke (1) and the iron core (2) are connected together by male-female plug-in interference fit between the protrusion (3) and the concave hole (4).
2. The connection structure of the yoke and the core according to claim 1, characterized in that: A concave hole (4) is provided on the yoke assembly surface (11), and a protrusion (3) is provided on the end surface of the core assembly end (21).
3. The connection structure between the yoke and the core according to claim 2, characterized in that: The protrusion (3) is cylindrical, the protrusion (3) and the iron core (2) are coaxially arranged, and the diameter of the protrusion (3) is smaller than the diameter of the iron core (2).
4. The connection structure of the yoke and the core according to claim 3, characterized in that: The ratio of the diameter of the protrusion (3) to the diameter of the iron core (2) is 1 / 5 to 4 / 5.
5. The connection structure of the yoke and the core according to claim 1, characterized in that: A protrusion (3) is arranged on the yoke iron assembly surface (11), and a concave hole (4) is opened on the end surface of the iron core assembly end (21).
6. The connection structure of the yoke and the core according to claim 5, characterized in that: The protrusion (3) is cylindrical, the concave hole (4) is coaxially arranged with the iron core (2), and the ratio of the inner diameter of the concave hole (4) to the outer diameter of the iron core (2) is 1 / 4 to 3 / 4.
7. The connection structure of the yoke and the core according to claim 6, characterized in that: The protrusion (3) is a protrusion structure integrally formed on the yoke assembly surface (11) by punching.
8. The connection structure between the yoke and the core according to any one of claims 1 to 7, characterized in that: The protruding length of the protrusion (3) is matched with the concave depth of the concave hole (4).
9. A coil assembly, characterized in that: It comprises a coil frame (5), a conductive coil (6) wound on the coil frame (5), an iron core (2) inserted into the coil frame (5), and two yokes (1) respectively mounted at the two ends of the coil frame (5), wherein the two yokes (1) are connected to the two ends of the iron core (2) by adopting the connection structure between the yoke and the iron core as claimed in any one of claims 1 to 8.
10. A relay, characterized in that: The coil assembly comprises the coil assembly according to claim 9.