CN-122025378-A - Common mode inductance

CN122025378ACN 122025378 ACN122025378 ACN 122025378ACN-122025378-A

Abstract

The invention discloses a common-mode inductor, relates to the technical field of electromagnetic components, and particularly relates to a mounting and fixing structure of a common-mode inductor. The common-mode inductance fixing device solves the problems that the existing common-mode inductance fixing device adopts a split structure to cause scattered parts, complex assembly procedures and low production efficiency. The technical scheme is characterized by comprising an inductance device and a fixing device used for fixing the inductance device, wherein the inductance device comprises a magnetic core and a plurality of groups of coils wound on the magnetic core, the fixing device is of an integrated structure and comprises a base, a supporting cylinder, a movable cylinder, a pressing rod and a locking bolt, the base is positioned on one side of the magnetic core and used for fixing pins at two ends of the plurality of groups of coils, the supporting cylinder is fixedly arranged on the base, the movable cylinder is in sliding connection with the supporting cylinder, the pressing rod is arranged on the movable cylinder, the locking bolt penetrates through the movable cylinder and the supporting cylinder and is in threaded connection with the base, and the movable cylinder can be driven to move downwards by screwing the locking bolt, so that the magnetic core is pressed and fixed on the base by the pressing rod. The invention is mainly used for the common mode inductor which needs to be stably installed in the electronic equipment.

Inventors

JIANG SHIWEI
LIU AIPING
LIANG CAIFEN

Assignees

飞阳电子科技(商丘)有限公司

Dates

Publication Date: 20260512
Application Date: 20260131

Claims (10)

1. The utility model provides a common mode inductance, includes induction system, is used for fixing induction system's fixing device induction system includes the magnetic core and twines multiunit coil on the magnetic core, its characterized in that, fixing device is including being located magnetic core one side is used for fixed multiunit the base of the pin at coil both ends, fixed locating support section of thick bamboo on the base, with support section of thick bamboo sliding connection's movable section of thick bamboo, locate hold-down lever on the movable section of thick bamboo runs through movable section of thick bamboo, support section of thick bamboo and with base threaded connection's locking bolt.
2. The common mode inductor according to claim 1, wherein the base comprises a guide bottom plate and a fixing bottom plate, the guide bottom plate is provided with a plurality of first through holes which are respectively opposite to the positions of the pins, the fixing bottom plate is provided with a plurality of second through holes which are corresponding to the first through holes and can be overlapped, the aperture of the first through holes is larger than the outer diameter of the pins, the second through holes are of a through hole structure with a large upper part and a narrow lower part, a rubber holder is arranged at the bottom of the fixing bottom plate, a third through hole is arranged on the rubber holder and is aligned with the second through holes, the rubber holder has elasticity, the inner diameter of the third through holes is smaller than the outer diameter of the pins when the rubber holder is tightened, and the pins pass through the first through holes, the second through holes and the rubber holder.
3. The common mode inductor as claimed in claim 1, wherein the support cylinder has an open top structure, a through hole is formed in the bottom of the support cylinder, a first compression spring is disposed along the height direction of the support cylinder, one end of the first compression spring is fixed at one end of the support cylinder, which is close to the guide bottom plate, and the other end of the first compression spring is fixedly connected with the bottom of the movable cylinder.
4. The common mode inductor according to claim 1, wherein the movable cylinder is hollow, guide holes for allowing the locking bolts to pass through are formed in the bottom and the top of the movable cylinder, elastic supporting members are arranged in the hollow, a plurality of accommodating grooves are formed in the peripheral surface of the movable cylinder, the tail ends of the pressing rods are located in the accommodating grooves and are in rotary connection with the accommodating grooves, and the elastic supporting members are connected with the rotating points of the pressing rods.
5. The common mode inductor according to claim 4, wherein the elastic support member comprises a sliding seat, a second compression spring and a link rod, the sliding seat is slidably disposed in the movable cylinder, one end of the second compression spring is fixedly connected with the top of the movable cylinder, the other end of the second compression spring is fixedly connected with the sliding seat, a limiting table is disposed on the sliding seat and extends into the second compression spring, a plurality of openings aligned with the accommodating grooves are disposed on the peripheral surface of the sliding seat, one end of the link rod is rotatably connected in the openings, and the other end of the link rod is rotatably connected with the compression rod.
6. The common mode inductor of claim 1, wherein the upper edge of the hold-down bar has a ramp structure, and the lower edge of the hold-down bar has a clamping groove, and the width of the clamping groove is the same as the thickness of the magnetic core.
7. The common mode inductor as claimed in claim 1, wherein a limit rod is disposed between the movable cylinder and the supporting cylinder, one end of the limit rod is fixedly connected with the movable cylinder, and the other end is slidably connected with the supporting cylinder.
8. The common mode inductor of claim 2, wherein the guide base plate is provided with a plurality of first spacers extending toward an edge of the guide base plate for spacing adjacent coils.
9. The common mode inductor of claim 8, wherein a buffer pad is disposed in the first spacer.
10. The common mode inductor as claimed in claim 2, wherein the guide base plate has a plurality of clamping grooves on a circumferential surface thereof, and the fixing base plate has a buckle engaged with the clamping grooves.

Description

Common mode inductance Technical Field The invention relates to the technical field of electromagnetism, in particular to a common mode inductor. Background With the rapid development of the electronic information industry, the common mode inductor is used as a key filter element, and is widely applied to a switching power supply, communication equipment and various electronic circuits, and is important for suppressing common mode electromagnetic interference and improving electromagnetic compatibility of a system. Common mode inductances are typically composed of toroidal cores, multiple sets of wound coils, and means for securing and supporting. In the prior art, in order to stably mount the common mode inductor on the circuit board and achieve reliable electrical connection, pins of multiple groups of coils are generally required to be fixed. The traditional fixing mode adopts split type structure more, namely accepts the pin through an independent bottom plate device (or bonding pad) earlier, and then uses another independent centre gripping or locking device to fix the magnetic core from the inductance opposite side, often still need carry out the point to the junction between pin and the bottom plate at last and glue or weld to prevent that the pin is not hard up. The split type fixing scheme has the advantages that firstly, the number of parts is large and scattered, the parts are required to be aligned and operated respectively in the assembling process, the process is complicated, the assembling efficiency is low, secondly, the split type structure is easy to scatter in the transportation and pre-assembling stages, the management cost is increased, furthermore, the dispensing or welding process adopted for ensuring the reliable pin fixing is increased, the additional production process steps and working hours are increased, the production takt and the product reliability are possibly influenced due to the time required for glue curing or the thermal stress generated by welding, and in addition, when the number of pins is large, the pins are accurately aligned and inserted into holes of the split type bottom plate to be difficult to a certain extent. Disclosure of Invention The invention aims to provide a common-mode inductor, which solves the problems of scattered parts, complex assembly procedures and low production efficiency caused by the adoption of a split structure of the conventional common-mode inductor fixing device. In order to achieve the purpose, the common mode inductor comprises an inductor device, a fixing device used for fixing the inductor device, wherein the inductor device comprises a magnetic core and a plurality of groups of coils wound on the magnetic core, the fixing device comprises a base, a supporting cylinder, a movable cylinder, a pressing rod and a locking bolt, the base is positioned on one side of the magnetic core and used for fixing a plurality of groups of pins at two ends of the coils, the supporting cylinder is fixedly arranged on the base, the movable cylinder is in sliding connection with the supporting cylinder, the pressing rod is arranged on the movable cylinder, and the locking bolt penetrates through the movable cylinder, the supporting cylinder and is in threaded connection with the base. Further, the base includes guide bottom plate and PMKD, be equipped with a plurality of first through-holes that are relative with the pin position respectively on the guide bottom plate, be provided with on the PMKD a plurality of with first through-hole corresponds and can overlap the second through-hole, the aperture of first through-hole is greater than the external diameter of pin, the second through-hole is big-end-up's through-hole structure, the bottom of PMKD is equipped with the rubber holder, be equipped with the third through-hole on the rubber holder, the third through-hole with the second through-hole aligns, the rubber holder has elasticity, the rubber holder tightens up the time the third through-hole internal diameter is less than the external diameter of pin, and the pin passes first through-hole, second through-hole and rubber holder. Further, the support cylinder is internally provided with an open top structure, a through hole is formed in the bottom of the support cylinder, a first compression spring is arranged along the height direction of the support cylinder, one end of the first compression spring is fixedly arranged at one end, close to the guide bottom plate, of the support cylinder, and the other end of the first compression spring is fixedly connected with the bottom of the movable cylinder. Further, the movable cylinder is of a hollow structure, guide holes for allowing the locking bolts to pass through are formed in the bottom and the top of the movable cylinder, elastic supporting pieces are arranged in the hollow structure, a plurality of accommodating grooves are formed in the peripheral surface of the movable cylinder, the tail ends o