一种倒扣式固定铁芯双保持式电磁铁
By using an inverted fixed iron core structure and a magnetic shielding sheet design, the problems of rusting of the fixed iron core and difficulty in separating the movable iron core of the electromagnet are solved, achieving the effect of integrity of the electroplating layer and easy separation, thus extending the service life of the electromagnet.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 江西省博顺磁电科技有限公司
- Filing Date
- 2025-08-01
- Publication Date
- 2026-07-17
AI Technical Summary
The fixed iron core of existing electromagnets is prone to rusting, and the movable iron core is not easy to separate from the fixed iron core after being in contact for a long time, which leads to the failure of the electromagnet function.
The structure adopts an inverted fixed iron core. By setting a magnetic shielding sheet between the fixed iron core and the movable iron core, and using an interference fit to connect the push rod and the movable iron core, direct contact is avoided. Combined with the different diameter sections of the coil assembly, the electroplating layer is ensured to be intact and easy to separate.
It effectively protects the electroplated layer of the fixed iron core, prevents rust, extends the service life of the electromagnet, and makes it easy to separate the fixed iron core from the movable iron core, thereby improving the reliability and service life of the electromagnet.
Smart Images
Figure CN224519617U_ABST
Abstract
Claims
1. A double-holding electromagnet with an inverted fixed core, comprising a housing (1), a coil assembly (2), a movable assembly (3), a fixed core (4), and a top cover (5), wherein the movable assembly (3) is inserted into a through hole provided in the coil assembly (2), the fixed core (4) has two cores, each with a through hole in the middle, one of which abuts against a through hole provided on the inner side of the bottom of the housing (1), and the other abuts against a through hole provided on the inner side of the top cover (5), the coil assembly (2) is installed inside the housing (1), and the top cover (5) is riveted to the housing (1), characterized in that: The fixed iron core (4) includes a first diameter section (41), a second diameter section (42) and a third diameter section (43), and the coil assembly (2) includes an axially perforated first inner diameter section (221) and a second inner diameter section (222).
2. The inverted fixed-core dual-hold solenoid of claim 1, wherein: The diameter of the first diameter segment (41) is smaller than the diameter of the perforation at the bottom of the shell (1) and the diameter of the perforation in the middle of the top cover. The diameter of the second diameter segment (42) is larger than the diameter of the perforation at the bottom of the shell (1) and the diameter of the perforation in the middle of the top cover. The diameter of the second diameter segment (42) is smaller than the diameter of the first inner diameter segment (221), which is larger than the diameter of the second inner diameter segment (222). The diameter of the third diameter segment (43) is smaller than the diameter of the second inner diameter segment (222).
3. The inverted fixed-core dual-hold solenoid of claim 1, wherein: The coil assembly (2) includes a coil (21), a bobbin (22), and a magnet (23).
4. The inverted fixed core double-holding electromagnet according to claim 1, characterized in that: The movable component (3) includes a movable iron core (31) and a push rod (32). The push rod (32) is connected to the movable iron core (31) by an interference fit, and its two ends extend from the two axial ends of the movable iron core (31).
5. The inverted fixed-core dual-hold solenoid of any one of claims 1-4, wherein: The electromagnet also includes an O-ring (6) and a magnetic shielding sheet (7).
6. The inverted fixed-core dual-hold solenoid of claim 5, wherein: Two O-rings (6) and two magnetic shielding sheets (7) are provided, respectively sleeved on the push rod (32) and located on both sides of the movable iron core (31). The O-ring (6) is located between the magnetic shielding sheet (7) and the movable iron core (31).