Contactor push rod mounting structure

Abstract

The utility model relates to the technical field of contactors, and discloses a contactor push rod mounting structure, which comprises a yoke plate assembly, a movable iron core and a push rod, the push rod penetrates through the yoke plate assembly, the movable iron core is sleeved with the push rod and is in threaded connection with the push rod, the end, away from the yoke plate assembly, of the movable iron core is provided with a riveted face, and the end, away from the yoke plate assembly, of the push rod is riveted to the riveted face. The stability of the finished product quality of the contactor can be improved.

Description

Technical Field

[0001] This application relates to the technical field of contactors, and in particular to a contactor push rod mounting structure. Background Technology

[0002] A contactor is an electrical component used to connect or disconnect DC circuits. One of the key specifications of a contactor is its contact resistance, which is affected by the magnetic gap.

[0003] Currently, the magnetic gap of the contactor is formed between the yoke plate assembly and the moving iron core. The moving iron core is threaded onto the push rod, which passes through the yoke plate assembly and connects to the auxiliary spring. During contactor assembly, a limiting block is placed between the yoke plate assembly and the moving iron core. Then, the moving iron core is moved to a position where it and the yoke plate assembly clamp the limiting block. Finally, the push rod and the tail of the moving iron core are fixed with epoxy resin.

[0004] However, epoxy adhesives not only have a long curing time, generally requiring more than two hours, which increases manufacturing costs, but the epoxy adhesive dispensing process is also difficult to control, and overflow is prone to occur. This causes the adhesive to flow onto the outer peripheral wall of the moving iron core, directly affecting the friction coefficient of the outer peripheral wall of the moving iron core, and is generally scrapped.

[0005] Therefore, the existing method of fixing the moving iron core and the push rod with epoxy glue is prone to increased manufacturing costs and unstable product quality due to the uncontrollability of curing time and glue application process. Utility Model Content

[0006] To improve the stability of the finished contactor quality, this application provides a contactor push rod mounting structure.

[0007] This application provides a contactor push rod mounting structure, which adopts the following technical solution:

[0008] A contactor push rod mounting structure includes a yoke plate assembly, a moving iron core, and a push rod; the push rod passes through the yoke plate assembly, and the moving iron core is sleeved and threadedly connected to the push rod; the end of the moving iron core away from the yoke plate assembly has a riveting surface, and the end of the push rod away from the yoke plate assembly is riveted to the riveting surface.

[0009] By adopting the above technical solution, the moving iron core and the push rod are fixed by riveting, which replaces the traditional epoxy glue fixing method. This improves assembly efficiency, reduces manufacturing costs, and avoids the overflow of epoxy glue during the dispensing process. It also stabilizes the friction coefficient of the outer wall of the moving iron core, thereby improving the performance and reliability of the contactor.

[0010] Optionally, the moving iron core has an assembly cavity at the end away from the yoke plate assembly, the assembly cavity enclosing the end of the push rod away from the yoke plate assembly, and the riveting surface is formed on the inner end wall of the assembly cavity.

[0011] By adopting the above technical solution, the assembly cavity allows the push rod to be located in the assembly cavity after riveting, thereby improving the stability of the riveting process and the moving iron core structure after riveting.

[0012] Optionally, the riveting surface has an anti-rotation portion that contacts the compressed push rod, the anti-rotation portion being raised or recessed relative to the riveting surface, and at least one anti-rotation portion is present on the riveting surface.

[0013] By adopting the above technical solution, the push rod can be embedded in or wrapped around the anti-rotation part after riveting, thereby restricting the relative rotation between the push rod and the moving iron core, so that the moving iron core is not easy to rotate during the working process, thus improving the working effect of the moving iron core.

[0014] Optionally, the anti-rotation part is connected to the threaded hole of the moving iron core for the threaded movement of the push rod.

[0015] By adopting the above technical solution, the anti-rotation part is close to the threaded hole, making it easier for the anti-rotation part to cooperate with the riveted push rod.

[0016] Optionally, the push rod is riveted by riveting.

[0017] By adopting the above technical solution and using riveting to fix the contactor, the stability and uniformity of the pressure on the push rod are improved, thereby improving the fixing effect of the moving iron core and thus improving the stability and service life of the contactor.

[0018] Optionally, the push rod mounting mechanism may further include a limiting member, which is used to abut against the yoke plate assembly and the moving iron core during contactor assembly.

[0019] By adopting the above technical solution, the gap between the yoke plate assembly and the moving iron core is limited by the limiting component, so as to provide support for the moving iron core when the push rod is riveted, thereby improving the accuracy of the magnetic gap.

[0020] Optionally, the limiting member includes two limiting seats, each of which includes a connected limiting portion and a stabilizing portion; the limiting portion is used to limit the magnetic gap between the yoke plate assembly and the moving iron core, and the stabilizing portion has an abutting surface for conforming to the outer periphery of the moving iron core; when the limiting portions of both limiting seats are inserted between the yoke plate assembly and the moving iron core, the stabilizing portions of the two limiting seats abut against and jointly clamp the moving iron core through the abutting surfaces.

[0021] By adopting the above technical solution, the magnetic gap is limited by the limiting part. The two stabilizing parts jointly clamp the moving iron core to maintain the stability of the moving iron core when the push rod is riveting.

[0022] Optionally, when the contact surfaces of both limiting seats abut against the outer peripheral wall of the moving iron core, the limiting portions of the two limiting seats together enclose the moving iron core.

[0023] By adopting the above technical solution, the two limiting parts together enclose the moving iron core, so as to protect the outer periphery of the moving iron core while limiting its position.

[0024] In summary, this application includes at least one of the following beneficial effects:

[0025] 1. By using a riveting method to fix the moving iron core and the push rod, the traditional epoxy adhesive fixing process is replaced, shortening the curing time, thereby accelerating the production process and improving manufacturing efficiency. At the same time, it avoids the uncontrollability of the epoxy adhesive dispensing process, such as overflow and uneven curing, reducing the scrap rate and thus lowering production costs;

[0026] 2. The limiting member of this application defines the magnetic gap through the limiting part and surrounds the moving iron core through the stabilizing part to improve the stability of the moving iron core when the push rod is riveted;

[0027] 3. The push rod is riveted using a rotary riveting method, which provides more uniform riveting pressure, resulting in a more robust riveted structure. This helps improve the contactor's shock resistance and durability, extending its service life. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application;

[0029] Figure 2 This is a schematic diagram of the push rod assembly in Embodiment 1 of this application;

[0030] Figure 3 yes Figure 2 Cross-sectional view at point AA;

[0031] Figure 4 This is a schematic diagram of the moving iron core in Embodiment 1 of this application;

[0032] Figure 5 This is a schematic diagram of another shape of the stop section in Embodiment 1 of this application;

[0033] Figure 6 This is a schematic diagram of another shape of the stop section in Embodiment 1 of this application;

[0034] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of this application;

[0035] Figure 8 This is a structural schematic diagram of Embodiment 3 of this application.

[0036] Explanation of reference numerals in the attached drawings: 1. Yoke plate; 2. Stationary iron core; 3. Moving iron core; 4. Push rod; 41. Moving section; 42. Threaded section; 43. Riveting section; 5. Limiting component; 51. Limiting seat; 511. Distance limiting part; 512. Stabilizing part; 6. Riveting surface; 7. Assembly cavity; 8. Anti-rotation part; 9. Threaded hole; 10. Abutment surface; 11. First opposing surface; 12. Second opposing surface; 13. Receiving cavity. Detailed Implementation

[0037] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail.

[0038] Example 1:

[0039] This application discloses a contactor push rod mounting mechanism. (Refer to...) Figure 1 The contactor's push rod mounting mechanism includes a yoke plate assembly, a moving iron core 3, and a push rod 4. In this embodiment, the yoke plate assembly includes a yoke plate 1 and a stationary iron core 2.

[0040] The stationary iron core 2 is connected to the yoke plate 1, and the moving iron core 3 is opposite to the end of the stationary iron core 2 away from the yoke plate 1. One end of the push rod 4 passes through both the stationary iron core 2 and the yoke plate 1, and the other end of the push rod 4 is threaded onto the moving iron core 3. A magnetic gap is formed between the opposite sides of the stationary iron core 2 and the moving iron core 3.

[0041] Specifically, the stationary iron core 2 can be fixed to the yoke plate 1 by welding or riveting at one end, and riveting is preferred in this embodiment. The end face of the stationary iron core 2 away from the yoke plate 1 is the first opposing surface 11, which is a plane.

[0042] The moving iron core 3 has threaded holes 9 extending through both ends of the moving iron core 3 along the distribution direction of the stationary iron core 2 and the moving iron core 3. The threaded holes 9 are threaded into the push rod 4. The end face of the moving iron core 3 near the stationary iron core 2 is the second opposing surface 12. The end of the moving iron core 3 away from the stationary iron core 2 extends towards the stationary iron core 2 and has an assembly cavity 7. The inner end wall of the moving iron core 3 near the stationary iron core 2 in the assembly cavity 7 is the riveting surface 6. Both the second opposing surface 12 and the riveting surface 6 are planes parallel to the first opposing surface 11. In this embodiment, the moving iron core 3 is cylindrical to facilitate coil winding, and the axis of the moving iron core 3 is perpendicular to both the second opposing surface 12 and the riveting surface 6.

[0043] It should be noted that a spring is abutting between the stationary iron core 2 and the moving iron core 3. The spring gives the moving iron core 3 a spring force to move away from the stationary iron core 2. The first opposing surface 11 and the second opposing surface 12 are respectively provided with receiving cavities 13 for the opposite ends of the spring to abut.

[0044] Reference Figure 1 The push rod 4 is cylindrical and includes a moving section 41, a threaded section 42, and a riveting section 43 arranged coaxially along its length. The end of the moving section 41 furthest from the threaded section 42 passes through both the stationary iron core 2 and the yoke plate 1, while the end of the moving section 41 closest to the threaded section 42 is located in the receiving cavity 13 of the moving iron core 3. The threaded section 42 matches the threaded hole 9 of the moving iron core 3, allowing the moving iron core 3 to adjust its position on the push rod 4 by rotation during contactor assembly. The riveting section 43 is located in the assembly cavity 7 and is used to rivet and fix it to the riveting surface 6 of the moving iron core 3. The outer diameter of the riveting section 43 is smaller than the inner diameter of the assembly cavity 7. When riveting the riveting section 43 using a riveting device, a rotary riveting method is used. The pressure head of the riveting device presses down on the riveting section 43 while continuously rotating, allowing the riveting section 43 to undergo more complete and uniform plastic deformation.

[0045] Reference Figure 2 and Figure 3 Furthermore, to improve the stability of the push rod during riveting, the push rod mounting mechanism also includes a limiting member 5, which is used to abut against the stationary iron core 2 and the moving iron core 3. The limiting member 5 includes two limiting seats 51, each of which includes a connected limiting part 511 and a stabilizing part 512. Both the limiting part 511 and the stabilizing part 512 are block-shaped. The thickness of the limiting part 511 is consistent with the magnetic gap that the contactor needs to set. The limiting part 511 is used to abut against the stationary iron core 2 and the moving iron core 3 during contactor assembly. The moving iron core 3 moves threadedly until the first opposing surface 11 and the second opposing surface 12 jointly clamp the limiting part 511 to adjust the magnetic gap. In this embodiment, the limiting part 511 is a semi-circular arc with an outer diameter consistent with the outer diameter of the moving iron core 3.

[0046] The stabilizing part 512 is fixed to the outer wall of the limiting part 511. The stabilizing part 512 has an abutment surface 10 for conforming to the outer peripheral wall of the moving iron core 3. The extension range of the abutment surface 10 is less than or equal to half of the outer periphery of the moving iron core 3, and the shape of the abutment surface 10 is adapted to the outer periphery of the moving iron core 3. In this embodiment, the extension angle range of the abutment surface 10 is half of the outer periphery of the moving iron core 3, and the extension height of the abutment surface 10 is consistent with the axial height of the moving iron core 3. Since the moving iron core 3 in this embodiment is cylindrical, the abutment surface 10 is a semi-circular arc with an inner diameter consistent with the outer diameter of the moving iron core 3.

[0047] Reference Figure 2 and Figure 3When riveting the push rod 4 and the riveting section 43, both limiting members 5 are engaged with the moving iron core 3, so that both limiting parts 511 abut between the stationary iron core 2 and the moving iron core 3, and the two limiting parts 511 together form an annular shape with an outer diameter consistent with the outer diameter of the moving iron core 3. At the same time, the two stabilizing parts 512 together surround and clamp the moving iron core 3 before riveting the riveting section 43, thereby improving the stability of the moving iron core 3 during riveting and making it less prone to displacement. The two stabilizing parts 512 can be connected by a detachable connector or can be pushed by a pneumatic component on the riveting equipment to maintain the clamped state of the moving iron core 3.

[0048] Reference Figure 1 and Figure 4 Furthermore, to improve the riveting effect between the push rod 4 and the moving iron core 3, the riveting surface 6 has an anti-rotation portion 8. In this embodiment, the anti-rotation portion 8 is close to and communicates with the threaded hole 9, and at least one anti-rotation portion 8 is distributed circumferentially along the threaded hole 9. In other embodiments, the anti-rotation portion 8 may also be located on the riveting surface 6 and not communicate with the threaded hole 9.

[0049] In this embodiment, the anti-rotation part 8 is a groove-shaped recess that is recessed relative to the riveting surface 6 towards the stationary iron core 2. The shape of the groove-shaped anti-rotation part 8 can be as follows: Figure 4 Square, like Figure 5 Triangular, such as Figure 6 It has an arc shape or similar. In this embodiment, the number of anti-rotation parts 8 is four, which are evenly distributed around the circumference of the threaded hole 9. In other embodiments, the number of anti-rotation parts 8 can be one, two, three, five, etc.

[0050] When the riveting section 43 deforms under pressure towards the riveting surface 6, it can embed itself into the anti-rotation part 8, thereby further preventing relative rotation between the push rod 4 and the moving iron core 3, thus improving the stability of the fixation between the push rod 4 and the moving iron core 3. It should be noted that the limiting member 5 can be replaced according to different magnetic gaps and different sizes of the moving iron core 3.

[0051] Furthermore, the end of the threaded hole 9 furthest from the stationary iron core 2 gradually enlarges in the direction away from the stationary iron core 2, and the enlarged portion of the threaded hole 9 is connected to the anti-rotation part 8. The enlarged portion of the threaded hole 9 can not only guide the push rod 4 through the moving iron core 3, but also guide the deformation of the riveting section 43, making it easier for the riveting section 43 to enter the anti-rotation part 8.

[0052] The implementation principle of a contactor push rod mounting structure according to an embodiment of this application is as follows: When assembling the contactor, the following steps are included: S1, the stationary iron core 2 is first riveted to the yoke plate 1. S2, one of the limiting blocks is placed between the moving iron core 3 and the stationary iron core 2, and the moving iron core 3 is moved by thread so that the moving iron core 3 and the stationary iron core 2 together clamp the limiting part 511. S3, the limiting block is removed, and it is checked whether the distance between the stationary iron core 2 and the moving iron core 3 meets the set magnetic gap distance. S4, both limiting blocks are engaged with the moving iron core 3, that is, the two limiting parts 511 are inserted between the moving iron core 3 and the stationary iron core 2, and the two stabilizing parts 512 together enclose and clamp the moving iron core 3. S5, the riveting section 43 is riveted and fixed to fix the moving iron core 3 and the push rod 4.

[0053] Example 2:

[0054] The main difference between Example 2 and Example 1 is that the specific configuration of the anti-rotation part 8 is different.

[0055] Reference Figure 7 In this embodiment, the anti-rotation part 8 is a protrusion that protrudes from the riveting surface 6 away from the stationary iron core 2 relative to the riveting surface 6, and the riveting section 43 wraps around the anti-rotation part 8 when it is pressed. The implementation principle of Embodiment 2 is the same as that of Embodiment 1, and will not be repeated here.

[0056] Example 3:

[0057] The main difference between Example 3 and Example 1 is that the specific configuration of the yoke plate assembly is different.

[0058] Reference Figure 8 In this embodiment, the yoke plate 1 assembly includes a yoke plate 1, a moving iron core 3 opposite to the yoke plate 1, and the side of the yoke plate 1 near the moving iron core 3 is a plane parallel to the second opposing surface. A push rod 4 passes through the yoke plate 1, a spring is installed between the yoke plate 1 and the moving iron core 3, and a magnetic gap is formed between the yoke plate 1 and the moving iron core 3. When the push rod 4 is riveted, the limiting part 511 abuts against the opposing surfaces of the yoke plate 1 and the moving iron core 3 on its two opposite sides, and the stabilizing part 512 surrounds the moving iron core 3.

[0059] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A contactor push rod mounting structure, characterized in that: It includes a yoke plate assembly, a moving iron core (3) and a push rod (4); the push rod (4) passes through the yoke plate assembly, and the moving iron core (3) is sleeved and threadedly connected to the push rod (4). The end of the moving iron core (3) away from the yoke plate assembly has a riveting surface (6), and the end of the push rod (4) away from the yoke plate assembly is riveted to the riveting surface (6).

2. The contactor push rod mounting structure according to claim 1, characterized in that: The moving iron core (3) has an assembly cavity (7) at the end away from the yoke plate assembly. The assembly cavity (7) surrounds the end of the push rod (4) away from the yoke plate assembly. The riveting surface (6) is formed on the inner end wall of the assembly cavity (7).

3. The contactor push rod mounting structure according to claim 1, characterized in that: The riveting surface (6) has an anti-rotation part (8) that contacts the pushed rod (4) after being pressed. The anti-rotation part (8) is raised or recessed relative to the riveting surface (6), and there is at least one anti-rotation part (8) on the riveting surface (6).

4. The contactor push rod mounting structure according to claim 3, characterized in that: The anti-rotation part (8) is connected to the threaded hole (9) of the moving iron core (3) for the threaded movement of the push rod (4).

5. The contactor push rod mounting structure according to claim 1, characterized in that: The push rod (4) is riveted by riveting.

6. The contactor push rod mounting structure according to claim 1, characterized in that: The push rod mounting mechanism also includes a limiting member (5), which is used to abut against the yoke plate assembly and the moving iron core (3) during contactor assembly.

7. The contactor push rod mounting structure according to claim 6, characterized in that: The limiting member (5) includes two limiting seats (51), each of the limiting seats (51) including a connecting limiting part (511) and a stabilizing part (512); the limiting part (511) is used to limit the magnetic gap between the yoke plate assembly and the moving iron core (3), and the stabilizing part (512) has an abutting surface (10) for fitting the outer periphery of the moving iron core (3); when the limiting parts (511) of the two limiting seats (51) are both inserted between the yoke plate assembly and the moving iron core (3), the stabilizing parts (512) of the two limiting seats (51) abut against and jointly clamp the moving iron core (3) through the abutting surface (10).

8. The contactor push rod mounting structure according to claim 7, characterized in that: When the contact surfaces (10) of the two limiting seats (51) abut against the outer peripheral wall of the moving iron core (3), the limiting portions (511) of the two limiting seats (51) together surround the moving iron core (3).

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