CN209964025U - EMI filter - Google Patents

Abstract

The utility model provides an EMI filter, which at least comprises a filtering unit, a bus bar and an outer shell, wherein the filtering unit is arranged on a bottom plate component, the bottom plate component comprises a bottom plate and a bottom plate connecting seat, the bottom plate connecting seat is a concave seat, the concave surface at the upper part of the bottom plate connecting seat is a cambered surface, and the plane at the lower part of the bottom plate connecting seat is fixedly arranged on the bottom plate; the filtering unit at least comprises a magnetic ring, a circuit board, and a capacitor and a resistor which are arranged on the circuit board; the magnetic ring is arranged in the concave surface of the bottom plate connecting seat and is attached to the concave surface; the circuit board is positioned on two sides of the magnetic ring and fixedly arranged on the side surface of the bottom plate connecting seat, the busbar penetrates through the ring of the magnetic ring, the middle part of the busbar is fixed in the magnetic ring through insulating fillers, and two ends of the busbar penetrate through the corresponding reinforcing plates. The utility model discloses a bottom plate subassembly relies on as whole wave filter inner assembly, and the equal fixed mounting of filtering unit, bottom plate connecting seat and fixing base can both go on outside the casing with the maintenance on the bottom plate, and is very convenient.

Description

EMI filter

Technical Field

The utility model relates to the field of electronic technology, in particular to EMI wave filter.

Background

The EMI filter is an electrical device which effectively filters a frequency point of a specific frequency in a power line or frequencies other than the frequency point. The function of the EMI filter is to obtain a power signal of a specific frequency or to eliminate a power signal of a specific frequency by connecting the EMI filter in a power line. The EMI filter is a passive bidirectional network, one end of the EMI filter is a power supply, the other end of the EMI filter is a load, and therefore the EMI filter is an impedance adaptation network, and the more impedance mismatch between the input side and the output side of the EMI filter and the power supply and the load side is, the more effective the attenuation of electromagnetic interference is.

Spare part in the EMI wave filter product of selling on the market at present all is direct mount on the shell, and the inconvenient problem of ubiquitous equipment dismantlement needs to use multiple instrument just can assemble and dismantle, and the dismouting is wasted time and energy, and equipment and maintenance are all very inconvenient, and mounting process's poor stability, and the user uses and experiences not well.

Disclosure of Invention

An object of the utility model is to overcome exist not enough among the prior art to a easy dismounting is provided, the equipment and the maintenance of being convenient for, and stable performance's EMI wave filter.

In order to achieve the above object, the present invention adopts a technical solution of an EMI filter, which at least includes a filtering unit, a bus bar and an outer housing, wherein the filtering unit is installed on a bottom plate assembly, the bottom plate assembly includes a bottom plate and a bottom plate connecting seat, the bottom plate connecting seat is a "concave" seat, a concave surface at an upper portion of the bottom plate connecting seat is a cambered surface, and a lower portion plane of the bottom plate connecting seat is fixedly installed on the bottom plate; the filtering unit at least comprises a magnetic ring, a circuit board, and a capacitor and a resistor which are arranged on the circuit board; the magnetic ring is arranged in the concave surface of the bottom plate connecting seat and is attached to the concave surface; the circuit board is positioned on two sides of the magnetic ring and fixedly arranged on the side surface of the bottom plate connecting seat, the busbar penetrates through the ring of the magnetic ring, the middle part of the busbar is fixed in the magnetic ring through insulating fillers, and two ends of the busbar penetrate through the corresponding reinforcing plates.

The further improvement to above-mentioned technical scheme is that the bottom plate is "I" type, including upper and lower and middle part face, evenly be provided with the mounting hole more than two respectively above it, be equipped with the bar through-hole more than two on its middle part face, bar through-hole evenly distributed in middle part face according to the matrix, the bottom plate connecting seat passes through hole fixed connection on the bottom plate.

And rib plates are respectively arranged at two ends of the bottom plate connecting seat and are attached to the end surfaces of the bottom plate connecting seat.

Be equipped with the fixing base between magnetic ring and reinforcing plate, fixing base lower part fixed connection is on the bottom plate, and fixing base upper portion is equipped with the mounting groove that corresponds with female position of arranging, arranges to be located the mounting groove and with fixing base fixed connection.

The bottom plate assembly, the reinforcing plate and the fixing seat are all made of insulating materials.

By the technical scheme provided by the utility model, because the utility model discloses bottom plate part has been add below bottom plate connecting seat and fixing base, the filtering unit, the equal fixed mounting of bottom plate connecting seat and fixing base is on the bottom plate, whole subassemblies of wave filter can directly assemble and dismantle in the outer casing outside, the reinforcing plate part that the cooperation was add, the shell body can be put into again after the completion of the outer equipment of casing completely to the inside components and parts of wave filter, dismantle and also can maintain or change after all components and parts of installing on the bottom plate are directly taken out from the shell body, it is all very convenient to install and maintain, production technology has also obtained fine optimization, user experience has been improved. In addition, in the technical proposal of the utility model, a fixing seat part is additionally arranged between the magnetic ring and the reinforcing plate, the upper part of the fixing seat is provided with a mounting groove corresponding to the position of the bus bar, the bus bar is positioned in the mounting groove and is fixedly connected with the fixing seat, the two ends of the bus bar sheet of the bus bar are respectively positioned, the middle part of the bus bar is fixed in the magnetic ring through insulating filler, the main performance component magnetic ring in the filter is more firmly fixed through the support of the busbar, the circuit boards in the filtering unit in the filter are positioned on two sides of the magnetic ring and are arranged on the side face of the bottom plate connecting seat, the capacitor and the resistor are respectively arranged on the corresponding circuit boards, each component in the filtering unit respectively adopts an independent fixing structure, the connecting mode is reliable, the deviation of internal components caused by the interference of the external severe environment is reduced, and the vibration resistance and the shock resistance of the product are improved. Through further increasing floor part, make the installation of filtering unit more firm, prolonged the life of product.

Drawings

Fig. 1 is a schematic view of the internal structure of the present invention.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is a schematic diagram of the external structure of the present invention.

FIG. 4 is a schematic view of the bottom plate of the present invention

In the figure: 1. the magnetic circuit comprises a magnetic ring, a circuit board 2, a capacitor 3, a resistor 4, a busbar 5, a bottom plate 6, a bottom plate connecting seat 7, a reinforcing plate 8, a fixing seat 9, an outer shell 10, a mounting hole 11, a through hole 12 and a rib plate 13.

Detailed Description

The present invention will be further explained with reference to the drawings and examples.

According to fig. 1, 2 and 3, the present embodiment includes a filtering unit, a busbar 5 and an outer casing 10, the filtering unit is mounted on a bottom plate assembly, the bottom plate assembly includes a bottom plate 6 and a bottom plate connecting seat 7, the bottom plate connecting seat 7 is a "concave" type seat, the upper concave surface of the bottom plate connecting seat is an arc surface, and the lower flat surface of the bottom plate connecting seat is fixedly mounted on the bottom plate 6; the filtering unit comprises a magnetic ring 1, a circuit board 2, and a capacitor 3 and a resistor 4 which are arranged on the circuit board 2; the magnetic ring 1 is arranged in the concave surface of the bottom plate connecting seat 7 and is attached to the concave surface; the circuit board 2 is positioned on two sides of the magnetic ring 1 and fixedly arranged on the side surface of the bottom plate connecting seat 7, the busbar 5 penetrates through the ring of the magnetic ring 1, the middle part of the busbar 5 is fixed in the magnetic ring 1 through insulating fillers, and two ends of the busbar 5 penetrate through the corresponding reinforcing plates 8.

According to fig. 4, the bottom plate 6 of this embodiment is "i" type, including upper and lower limit and middle part face, evenly be provided with mounting hole 11 more than two respectively about it, be equipped with two above bar through-holes 12 on its middle part face, bar through-hole 12 is in middle part face according to matrix evenly distributed, and bottom plate connecting seat 7 passes through-hole 12 fixed connection on bottom plate 6.

As shown in fig. 1, the floor connecting seat 7 of this embodiment has ribs 13 mounted at two ends thereof, and the ribs 13 are attached to the end surface of the floor connecting seat 7. The bottom plate assembly and the reinforcing plate 8 are both made of insulating materials.

According to fig. 1 and 4, a fixing seat 9 may be further disposed between the magnetic ring 1 and the reinforcing plate 8, a lower portion of the fixing seat 9 is fixedly connected to the bottom plate 6 through mounting holes 11 on two vertical edges of the bottom plate 6, a mounting groove corresponding to the position of the busbar 5 is disposed on an upper portion of the fixing seat 9, and the busbar 5 is disposed in the mounting groove and fixedly connected to the fixing seat 9.

The busbar in this embodiment is composed of three flat copper sheets.

The bottom plate part is overall structure in this embodiment, and total 40 bar through-holes 12 that are matrix distribution on the 6 middle part faces of bottom plate, the setting up of bar through-hole not only makes the mount pad can connect on the bottom plate more conveniently, and the bar through-hole can also alleviate the weight of bottom plate by a wide margin moreover, avoids the wave filter product to make whole weight increase too much because of the increase of part.

The fixing seat 9 and the rib plate 13 of the embodiment are made of high-strength composite insulating materials, and mainly play roles in strengthening and fixing, and the vibration resistance and the shock resistance of a filter product can be improved by adding the parts, so that the service life of the product is prolonged.

This embodiment has add the bottom plate part in bottom plate connecting seat and fixing base below, the filtering unit, the equal fixed mounting of bottom plate connecting seat and fixing base is on the bottom plate, the whole subassemblies of wave filter can directly be assembled and dismantle in the outer casing outside, the reinforcing plate part that the cooperation was set up, the shell body can be put into again after the completion of the outer equipment of casing completely to the inside components and parts of wave filter, dismantle and also can with install all components and parts on the bottom plate directly take out the back again and maintain or change in the shell body, it is all very convenient to install and maintain.

Claims (4)

1. The utility model provides an EMI wave filter, includes filtering unit, female arranging and shell body at least, its characterized in that: the filtering unit is arranged on the bottom plate component, the bottom plate component comprises a bottom plate and a bottom plate connecting seat, the bottom plate connecting seat is a concave seat, the concave surface of the upper part of the bottom plate connecting seat is an arc surface, and the plane of the lower part of the bottom plate connecting seat is fixedly arranged on the bottom plate; the filtering unit at least comprises a magnetic ring, a circuit board, and a capacitor and a resistor which are arranged on the circuit board; the magnetic ring is arranged in the concave surface of the bottom plate connecting seat and is attached to the concave surface; the circuit board is positioned on two sides of the magnetic ring and fixedly arranged on the side surface of the bottom plate connecting seat, the busbar penetrates through the ring of the magnetic ring, the middle part of the busbar is fixed in the magnetic ring through insulating fillers, and two ends of the busbar penetrate through the corresponding reinforcing plates.

2. The EMI filter of claim 1, wherein: the bottom plate is "I" type, including upper and lower and middle part face, evenly is provided with mounting hole more than 2 respectively above its upper and lower, is equipped with bar through-hole more than 2 on its middle part face, and bar through-hole evenly distributed is in the middle part face according to the matrix, and the bottom plate connecting seat passes through-hole fixed connection on the bottom plate.

3. The EMI filter of claim 1, wherein: the floor is installed respectively at the both ends of bottom plate connecting seat, and the floor laminating is in the terminal surface of bottom plate connecting seat.

4. The EMI filter of claim 1, wherein: the bottom plate assembly and the reinforcing plate are made of insulating materials.

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