CN219497663U - DC contactor - Google Patents

Abstract

The utility model relates to the technical field of electronic devices, and particularly discloses a direct current contactor. The direct current contactor comprises an outer shell, wherein the outer shell encloses a containing cavity and is provided with a through hole communicated with the containing cavity, and the containing cavity is internally provided with: yoke module, coil assembly module and contact module; the yoke module comprises a yoke frame and a magnetic conduction barrel, wherein the yoke frame forms a yoke groove, the magnetic conduction barrel is fixedly connected to the bottom of the yoke groove, and the yoke frame is provided with an avoidance hole site communicated with the yoke groove; the coil assembly module comprises chassis pins and a coil framework wound with a coil body, the coil framework is sleeved on the magnetic conduction cylinder, the chassis pins are fixedly connected with the coil framework and pass through avoidance holes and through holes at the same time, and the coil body is electrically connected with a lead-out sheet arranged on the chassis pins; the contact module is fixedly connected to the yoke frame and partially extends out of the accommodating cavity. According to the direct current contactor, through modularized treatment of each component, structural improvement is achieved, layout optimization is achieved, manufacturing cost is reduced, and dismounting efficiency is improved.

Description

DC contactor

Technical Field

The utility model relates to the technical field of electronic devices, in particular to a direct current contactor.

Background

The DC contactor is a contactor with a DC coil control iron core. Because the attraction coil of the direct current contactor is electrified with direct current, no impact starting current exists, and the direct current contactor is suitable for the occasion of frequent starting and stopping. The DC contactor generally comprises a coil, an external magnetic circuit, an arc extinguishing chamber, a static contact, a moving contact, a movable shaft assembly, a permanent magnet, a plastic shell and the like. The economic development of the current world is rapid, the development of the direct current power supply and distribution system is also day-to-day, and the application field is continuously expanded. With the wide application of dc power supply systems in the fields of electric automobiles, ships, aviation, rail transit, charging piles, photovoltaic and energy storage, the use amount of dc contactors is increasing.

In the prior art, more and more direct current contactors are additionally provided with auxiliary contacts to realize contact state action feedback, and because the auxiliary contact ends and the coil leading-out ends are low-voltage ends, two groups of signals are generally integrated on one side, the low-voltage ends are designed to be outwards led out from the side surface of a product in a connector plugging mode, and the auxiliary contacts and the coil leading-out ends are arranged at the bottom of the product.

However, considering that the arrangement of the lead-out legs of the low-voltage end coil is limited by the assembly process, it is necessary to ensure that the yoke has a sufficient magnetic conduction area. In order to ensure that the bobbin is properly assembled to the yoke so that the yoke and pole pieces can be properly riveted, it is necessary to define the width of the lead-out pieces so as not to be smaller than the width of the yoke.

The requirements are tedious and complex, a great amount of restrictions are brought to the structure of the direct current contactor, the manufacturing cost and the disassembly and assembly difficulty are improved, meanwhile, the strict requirements are put forward for the space arrangement inside the direct current contactor, and the optimization and improvement of the structure of the direct current contactor are limited.

Disclosure of Invention

The utility model aims to provide a direct current contactor, which realizes the modularized design of each component on the direct current contactor, and completes the structural improvement of the direct current contactor so as to optimize the layout in the accommodating cavity, reduce the production and manufacturing cost and improve the disassembly and assembly efficiency.

To achieve the purpose, the utility model adopts the following technical scheme:

the direct current contactor comprises an outer shell, wherein the outer shell encloses a containing cavity and is provided with a through hole communicated with the containing cavity, and a yoke module, a coil assembly module and a contact module are arranged in the containing cavity; the yoke module comprises a yoke frame and a magnetic conduction barrel, wherein the yoke frame forms a yoke groove, the magnetic conduction barrel is fixedly connected to the bottom of the yoke groove, and the yoke frame is provided with an avoidance hole site communicated with the yoke groove; the coil assembly module comprises a coil framework and chassis pins, wherein a coil body is wound on the coil framework, the coil framework is sleeved on the magnetic conduction cylinder, the chassis pins are fixedly connected with the coil framework and pass through the avoidance hole sites and the through holes at the same time, and the coil body is electrically connected with a lead-out sheet arranged on the chassis pins; the contact module is fixedly connected to the yoke frame and partially extends out of the accommodating cavity.

As the preferred technical scheme of direct current contactor, the yoke frame includes yoke bottom plate and two connect respectively in yoke curb plate at yoke bottom plate both ends, yoke bottom plate and two yoke curb plate enclose into the yoke groove, magnetic conduction section of thick bamboo runs through the yoke bottom plate, yoke curb plate keep away from the one end of yoke bottom plate with contact module looks rigid coupling.

As the preferred technical scheme of direct current contactor, the coil skeleton includes the carrier tube, the both ends of carrier tube cross-under respectively in coil skeleton bottom plate and spacing ring, the coil skeleton bottom plate the spacing ring with the surface of carrier tube encloses into the wire winding groove, the coil body coil in the wire winding inslot, chassis pin connect in the edge of coil skeleton bottom plate, every the equal cross-under of chassis pin has one the tab, the both ends of tab are link and end of drawing forth respectively, the link is arranged in the holding intracavity, with the coil body electricity is connected, the end of drawing forth stretches out the holding chamber.

As a preferable technical scheme of the direct current contactor, the coil frame bottom plate is rectangular, four bottom frame pins are respectively connected to four corners of the coil frame bottom plate, and the lead-out sheets are injection molded on the bottom frame pins; the four lead-out pieces are divided into two coil lead-out pins and two auxiliary contact lead-out pieces.

As the preferable technical scheme of direct current contactor, the length direction of magnetic conduction section of thick bamboo is perpendicular to the plane that yoke bottom plate was located, the length direction of carrier tube is perpendicular to the plane that coil former bottom plate was located, yoke bottom plate presss from both sides locates between the coil former bottom plate and the chamber wall in holding chamber.

As a preferable technical scheme of the direct current contactor, the contact module comprises a magnetic pole piece, the yoke side plate is riveted to the magnetic pole piece, and the coil framework is clamped between the yoke bottom plate and the magnetic pole piece.

As the preferable technical scheme of the direct-current contactor, the corners of the bottom plate of the yoke are provided with through holes, and the through holes and the cavity walls of the accommodating cavity form the avoidance hole positions.

As the preferred technical scheme of direct current contactor, chassis pin is equipped with a plurality ofly, every on the chassis pin all the rigid coupling have one with coil body electricity is connected draw forth the piece, the through-hole with the quantity of chassis pin is the same and one-to-one, dodge the hole site with the quantity of chassis pin is the same and one-to-one.

As the preferred technical scheme of direct current contactor, the shell body includes the last casing and can dismantle connect in the lower shell plate of last casing, the storage tank has been seted up to the bottom of going up the casing, lower shell plate seals the storage tank, the storage tank with lower shell plate forms the holding chamber.

As a preferable technical scheme of the direct current contactor, a through hole is formed in the edge of the lower shell plate, and the through hole and the groove wall of the accommodating groove form the through hole.

The utility model has the beneficial effects that:

according to the direct current contactor, through the modularized design of the yoke iron module, the coil assembly module and the contact module, all components with combined requirements are processed in a grouping mode, so that structural improvement of the direct current contactor is achieved, the layout of the inside of the accommodating cavity is optimized, the structural stability of all components is further improved, the assembly and disassembly process is optimized, assembly steps are reduced, assembly error risks are reduced, assembly and disassembly efficiency is improved, and meanwhile production and manufacturing costs are reduced. The coil skeleton cup joints in the design of magnetic conduction section of thick bamboo has reduced the space that occupies, has reduced the degree of difficulty that yoke module and coil assembly module assembled, has reduced the risk of equipment mistake by a wide margin, also helps controlling the relative position of coil body and magnetic conduction section of thick bamboo simultaneously, has ensured direct current contactor's smooth operation. The chassis pin passes simultaneously and dodges the relative position fixed of hole site and through-hole's design realized coil assembly module and yoke module and shell body, has also ensured simultaneously that the extraction tab that sets up on the chassis pin can expose in the external environment, has formed the relation of electric connection in proper order between contact module, coil body, extraction tab and the external component, and above design has satisfied the space arrangement interval demand of extraction tab, has guaranteed the uniformity of extraction tab, easily direct current contactor wholly carries out high-efficient assembly.

Drawings

Fig. 1 is a schematic structural diagram of a dc contactor according to an embodiment of the present utility model;

fig. 2 is a schematic diagram of a dc contactor according to a second embodiment of the present utility model;

FIG. 3 is a cross-sectional view of a DC contactor according to an embodiment of the present utility model;

FIG. 4 is a schematic view of the structure of a lower shell plate according to an embodiment of the present utility model;

fig. 5 is a schematic structural diagram of a coil lead-out pin according to an embodiment of the present utility model;

fig. 6 is a schematic structural view of an auxiliary contact lead-out sheet provided by an embodiment of the present utility model;

fig. 7 is a schematic structural view of a yoke module according to an embodiment of the present utility model;

fig. 8 is a schematic structural diagram of a coil assembly module according to an embodiment of the present utility model.

In the figure:

100. an upper housing; 200. a lower shell plate; 201. a through hole; 202. a first lug; 203. an avoidance groove; 210. a bending plate; 211. a second lug; 300. a lead-out sheet; 310. coil leading-out pins; 311. coil leading-out pin connecting ends; 312. a coil pin lead-out end; 320. auxiliary contact lead-out sheets; 321. an auxiliary contact lead-out sheet connecting end; 322. an auxiliary contact lead-out plate lead-out end; 400. a yoke module; 401. an avoidance port; 410. a yoke base plate; 420. a yoke side plate; 421. riveting the flange; 430. a magnetic conduction cylinder; 500. a coil assembly module; 510. a bobbin base plate; 520. chassis pins; 530. a carrier tube; 540. a limiting ring; 550. a coil body; 600. a contact module; 610. pole pieces.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first location" and "second location" are two distinct locations and wherein the first feature is "above," "over" and "over" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is level above the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

As shown in fig. 1 to 8, the present embodiment provides a dc contactor, which includes an outer housing, wherein the outer housing encloses a receiving cavity, and is provided with a through hole communicating with the receiving cavity, and a yoke module 400, a coil assembly module 500 and a contact module 600 are installed in the receiving cavity; the yoke module 400 comprises a yoke frame and a magnetic conduction barrel 430, wherein the yoke frame forms a yoke groove, the magnetic conduction barrel 430 is fixedly connected to the bottom of the yoke groove, and the yoke frame is provided with an avoidance hole site communicated with the yoke groove; the coil assembly module 500 comprises a coil framework and chassis pins 520, wherein a coil body 550 is wound on the coil framework, the coil framework is sleeved on the magnetic conduction cylinder 430, the chassis pins 520 are fixedly connected to the coil framework and pass through avoidance holes and through holes at the same time, and the coil body 550 is electrically connected with the lead-out sheets 300 arranged on the chassis pins 520; the contact module 600 is fixedly connected to the yoke frame and partially protrudes out of the receiving cavity.

According to the direct current contactor, through the modularized design of the yoke module 400, the coil assembly module 500 and the contact module 600, all components with combined requirements are processed in a grouping mode, so that the structural improvement of the direct current contactor is completed, the layout of the inside of the accommodating cavity is optimized, the structural stability of all the components is further improved, the assembly and disassembly processes are optimized, the assembly steps are reduced, the assembly error risk is reduced, the assembly and disassembly efficiency is improved, and meanwhile, the production and manufacturing cost is also reduced. The design that the coil skeleton cup joints in magnetic conduction section of thick bamboo 430 has reduced the space that occupies, has reduced yoke module 400 and coil assembly module 500 and has assembled the degree of difficulty, has reduced the risk of equipment mistake by a wide margin, also helps controlling the relative position of coil body 550 and magnetic conduction section of thick bamboo 430 simultaneously, has ensured direct current contactor's smooth operation. The design that chassis pin 520 passed dodges hole site and through-hole simultaneously has realized that coil assembly module 500 and yoke module 400 and shell body's relative position is fixed, has also ensured simultaneously that the extraction tab 300 that sets up on the chassis pin 520 can expose in the external environment, has formed the relation of electric connection in proper order between contact module 600, coil body 550, extraction tab 300 and the external component, and above design has satisfied the space arrangement interval demand of extraction tab 300, has guaranteed the uniformity of extraction tab 300, easily direct current contactor wholly carries out high-efficient assembly.

Specifically, the bottom surface of the magnetic cylinder 430 is not higher than the bottom surface of the yoke frame.

The dc contactor provided in this embodiment is suitable for a dc relay structure with a large low voltage and a large pitch, and the portion of the contact module 600 extending out of the accommodating cavity is used as an input end of the dc contactor, and the lead tab 300 is used as an output end of the dc contactor, so as to achieve the purpose of the dc contactor to be implemented.

Specifically, the shape of the accommodating cavity is cuboid; the yoke frame and the magnetic conductive cylinder 430 are made of magnetic conductive metal; the coil body 550 is formed by winding enameled wires, the enameled wires positioned at the head and the tail of the coil body 550 are regarded as lead-out pins of the coil body 550, the lead-out sheet 300 is connected with the lead-out pins through connecting wires, the materials of the coil framework and the underframe pins 520 are plastic and are integrally injection molded, and the connecting wires and the lead-out sheet 300 are buried in a processing die of the underframe pins 520 in advance.

In this embodiment, the yoke frame includes a yoke base plate 410 and two yoke side plates 420 respectively connected to two ends of the yoke base plate 410, the yoke base plate 410 and the two yoke side plates 420 enclose a yoke slot, the magnetic conductive tube 430 penetrates the yoke base plate 410, and one end of the yoke side plate 420 away from the yoke base plate 410 is fixedly connected with the contact module 600. Specifically, the center of the yoke bottom plate 410 is provided with a center hole, and the bottom of the magnetic conductive cylinder 430 is inserted into the center hole; the center hole is located the one end ring of yoke bottom plate 410 upper plate face and is equipped with the flanging ring, and the inner circle of flanging ring is laminated with magnetic conduction section of thick bamboo 430's surface mutually, and the thickness of flanging ring is the same with the thickness of yoke bottom plate 410. The design is simple and reliable, the accurate arrangement of the yoke frame is realized, the stable work of the yoke module 400 is ensured, the smooth operation of the direct current contactor is realized, and the maintenance frequency is reduced.

Further, the coil bobbin includes a carrier 530, two ends of the carrier 530 are respectively connected to the bobbin base plate 510 and the limiting ring 540 in a penetrating manner, the outer surfaces of the bobbin base plate 510, the limiting ring 540 and the carrier 530 enclose a winding slot, and the coil body 550 is wound in the winding slot. Specifically, the bobbin base plate 510 is a rectangular parallelepiped plate-like member. The coil bobbin provides a winding space, ensures smooth operation of each component on the coil assembly module 500, optimizes the space layout, is helpful for determining the relative position of the coil body 550 and the magnetic conductive cylinder 430, and further reduces the maintenance frequency of the direct current contactor.

Illustratively, the top of the stop collar 540 is provided with a 0.5 mm-1 mm high protrusion, and the top of the pole piece 610 is slightly below the top protrusion of the stop collar 540 by 0-0.5 mm.

Still further, chassis pins 520 are connected to the edge of the coil chassis base 510, each chassis pin 520 is connected to a lead-out piece 300 in a penetrating manner, two ends of the lead-out piece 300 are respectively a connection end and a lead-out end, the connection end is disposed in the accommodating cavity and electrically connected with the coil body 550, and the lead-out end extends out of the accommodating cavity. Specifically, the lead-out piece 300 is made of conductive copper material, the lead-out end is in a cuboid plate structure, and the gap between the lead-out end and the bottom of the chassis pin 520 is 0.5-1 mm; the connecting end is a prolate lead-out pin, penetrates through the underframe pin 520 and is led out from the upper plate surface of the coil former base plate 510, and is used as a winding end of the enameled wire.

Further, the coil frame bottom plate 510 is rectangular, four chassis pins 520 are respectively connected to four corners of the coil frame bottom plate 510, and the lead-out sheet 300 is injection molded on the chassis pins 520; the four lead-out tabs 300 are divided into two coil lead-out pins 310 and two auxiliary contact lead-out tabs 320. Two coil lead-out pins 310 are disposed adjacent to each other, and two auxiliary contact lead-out pieces 320 are disposed adjacent to each other. The integral injection molding mode of the lead-out sheet 300 on the underframe pins 520 ensures the positioning accuracy of the lead-out sheet 300 on the coil skeleton, improves the manufacturing efficiency of the coil skeleton and reduces the production cost of the coil skeleton.

Illustratively, the lead tab 300 is divided into a number of identical coil lead pins 310 and auxiliary contact lead tabs 320. The connection end on the coil lead-out pin 310 is a coil lead-out pin connection end 311, and the lead-out end on the coil lead-out pin 310 is a coil lead-out pin lead-out end 312; the connection end of the auxiliary contact lead-out sheet 320 is an auxiliary contact lead-out sheet connection end 321, and the lead-out end of the auxiliary contact lead-out sheet 320 is an auxiliary contact lead-out sheet lead-out end 322.

The coil lead-out pins 310 are not electrically connected to the contact modules 600, and the auxiliary contact lead-out pieces 320 are electrically connected to auxiliary contacts of the contact modules 600.

In this embodiment, the middle part of the coil lead-out pin 310 is bent and buried in the coil skeleton, the coil lead-out pin connection end 311 is wound with an enameled wire, and the coil lead-out pin lead-out end 312 is a bare plane for providing a product welding position.

The middle part of the auxiliary contact lead-out piece 320 is bent and buried in the coil framework, the connecting end 321 of the auxiliary contact lead-out piece exposes pins, a plug-in male connector is provided to be connected with an electric connecting piece (a PCB board, an electric wire or an injection molding conductive piece, etc.), and the lead-out end 322 of the auxiliary contact lead-out piece is a bare plane for providing a product welding position.

The coil lead-out pin lead-out ends 312 and the auxiliary contact lead-out tab lead-out ends 322 are symmetrically arranged and have the same shape, and the auxiliary contact lead-out tab connection ends 321 pass through the chassis pins 520 and are led out from the upper plate surface of the chassis base plate 510 to be used as connection pins. The dc contactor has auxiliary contacts provided with electrical connectors capable of being connected with auxiliary contact lead-out pieces 320 on the bobbin. The coil lead-out pins 310 and the auxiliary contact lead-out pieces 320 are conventional in the art, and their specific structures and working principles are common knowledge in the art, and will not be described in detail herein.

In this embodiment, the magnetic conductive tube 430 and the carrier tube 530 are both in a circular tubular structure, and the carrier tube 530 and the magnetic conductive tube 430 are coaxially and concentrically arranged.

Illustratively, the magnetic cylinder 430 has a length direction perpendicular to the plane of the yoke base plate 410, the carrier tube 530 has a length direction perpendicular to the plane of the bobbin base plate 510, and the yoke base plate 410 is sandwiched between the bobbin base plate 510 and the cavity wall of the receiving cavity. The design realizes the optimized layout of the yoke module 400, the coil assembly module 500 and the outer shell, realizes the accurate positioning of the yoke module 400, reduces the difficulty of disassembly and assembly, improves the production efficiency and reduces the occupation of the space in the accommodating cavity.

In this embodiment, the contact module 600 includes a pole piece 610, a yoke side plate 420 is riveted to the pole piece 610, and a coil bobbin is sandwiched between a yoke base plate 410 and the pole piece 610. Specifically, the end of the yoke side plate 420, which is remote from the yoke bottom plate 410, is provided with a caulking flange 421, and the caulking flange 421 is matingly caulking with the lower plate surface of the pole piece 610. The above arrangement realizes stable connection of the yoke module 400 and the contact module 600, so as to limit movement of the coil assembly module 500 in the length direction of the bearing tube 530, and achieve the purpose of positioning the coil assembly module 500, thereby further guaranteeing stable operation of the direct current contactor and reducing maintenance frequency.

Specifically, the bottom of the magnet conductive cylinder 430 is 0-0.5 mm lower than the lower plate surface of the yoke base plate 410.

Illustratively, the corners of the yoke bottom plate 410 are provided with avoiding openings 401, and the avoiding openings 401 and the cavity walls of the accommodating cavity form avoiding holes. The design formed by splicing the avoidance holes is simple and effective, the production cost of the yoke module 400 is reduced, the manufacturing efficiency of the yoke module 400 is improved, and meanwhile, the foolproof capability of the direct current contactor assembly is improved.

In this embodiment, a plurality of chassis pins 520 are provided, each chassis pin 520 is fixedly connected with a lead-out sheet 300 electrically connected with the coil body 550, the number of through holes is the same as that of the chassis pins 520 and corresponds to that of the chassis pins 520 one by one, and the number of avoiding holes is the same as that of the chassis pins 520 and corresponds to that of the chassis pins one by one. Specifically, the coil former base plate 510 is a cuboid, the chassis pins 520 are provided in four, the four chassis pins 520 are provided at four corners of the coil former base plate 510, two are coil lead-out pins 310, and two are auxiliary contact lead-out pieces 320, respectively. The above design realizes the limitation of the number and the positions of the lead-out sheets 300, not only meets the space arrangement spacing requirement of the lead-out sheets 300, but also helps to expand the application range of the direct current contactor, and further can be used in various different working environments.

In other implementations of the present embodiment, two chassis pins 520 are provided, and both are coil lead pins 310.

Illustratively, the outer housing includes an upper housing 100 and a lower housing plate 200 detachably connected to the upper housing 100, a receiving groove is opened at the bottom of the upper housing 100, the lower housing plate 200 closes the receiving groove, and the receiving groove and the lower housing plate 200 form a receiving cavity. Specifically, the lower shell plate 200 is a cuboid, at least two first lugs 202 are mounted on the long side of the lower shell plate 200, positioning grooves are concavely formed in the groove walls of the accommodating grooves, the number of the positioning grooves is the same as that of the first lugs 202, and each first lug 202 is matched and buckled in one positioning groove.

In this embodiment, the groove wall of the accommodating groove is penetrated with a plurality of slot holes, two sides of the lower shell plate 200 are fixedly connected with bending plates 210, the bending plates 210 extend along a direction perpendicular to the plane of the lower shell plate 200, one end of the bending plate 210 away from the lower shell plate 200 is provided with second lugs 211, the number of the second lugs 211 is the same as that of the slot holes, and each second lug 211 is in lock connection with one slot hole.

The split design of the upper shell 100 and the lower shell 200 reduces the processing difficulty of the outer shell, reduces the production cost of the outer shell, and simultaneously reduces the difficulty of the operator for disassembling and assembling the yoke module 400, the coil assembly module 500 and the contact module 600, thereby improving the working efficiency and reducing the workload of the operator. The snap fit of the positioning groove and the first lug 202 and the snap connection of the second lug 211 and the snap slot hole can effectively realize the detachable connection of the lower shell plate 200 on the upper shell 100, so that the structural stability of the outer shell is ensured.

Illustratively, the upper housing 100 and the lower housing plate 200 are both plastic and integrally injection molded.

Further, the edge of the lower shell plate 200 is provided with a through hole 201, and the through hole 201 and the groove wall of the accommodating groove form a through hole. Specifically, one through-hole 201 is provided at each of both ends of the long side of the lower shell plate 200. The through holes are spliced to form the simple and effective design, so that the production cost of the lower shell plate 200 is reduced, the manufacturing efficiency of the lower shell plate 200 is improved, and the disassembly and assembly speed of the direct current contactor is increased.

In this embodiment, the lower plate surface of the lower shell plate 200 is provided with avoidance grooves 203 with the same number as the through holes 201, each avoidance groove 203 is communicated with one through hole 201, the avoidance grooves 203 are arranged to provide a containing space for the leading-out end, the condition that the leading-out end is damaged due to external impact or extrusion is avoided, the risk of damage of the direct current contactor is reduced, and the service life of the direct current contactor is prolonged. Specifically, the distance between the bottom end of the lead-out terminal and the lower plate surface of the lower shell plate 200 is 5 mm or less.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The direct current contactor is characterized by comprising an outer shell, wherein the outer shell encloses a containing cavity and is provided with a through hole communicated with the containing cavity, and the containing cavity is internally provided with:

the yoke module (400) comprises a yoke frame and a magnetic conduction barrel (430), wherein the yoke frame forms a yoke groove, the magnetic conduction barrel (430) is fixedly connected to the bottom of the yoke groove, and the yoke frame is provided with an avoidance hole site communicated with the yoke groove;

the coil assembly module (500) comprises a coil framework and chassis pins (520), wherein a coil body (550) is wound on the coil framework, the coil framework is sleeved on the magnetic conduction cylinder (430), the chassis pins (520) are fixedly connected with the coil framework and pass through the avoidance hole sites and the through holes at the same time, and the coil body (550) is electrically connected with a lead-out sheet (300) arranged on the chassis pins (520);

and the contact module (600) is fixedly connected with the yoke frame and partially extends out of the accommodating cavity.

2. The direct current contactor according to claim 1, wherein the yoke frame comprises a yoke base plate (410) and two yoke side plates (420) respectively connected to both ends of the yoke base plate (410), the yoke base plate (410) and the two yoke side plates (420) enclose the yoke slot, the magnetic conductive cylinder (430) penetrates the yoke base plate (410), and one end of the yoke side plate (420) away from the yoke base plate (410) is fixedly connected with the contact module (600).

3. The direct current contactor according to claim 2, wherein the coil bobbin comprises a carrier tube (530), two ends of the carrier tube (530) are respectively connected to the coil bobbin base plate (510) and the limiting ring (540) in a penetrating manner, a winding groove is formed by the coil bobbin base plate (510), the limiting ring (540) and the outer surface of the carrier tube (530), the coil body (550) is wound in the winding groove, the chassis pins (520) are connected to the edge of the coil bobbin base plate (510), one lead-out sheet (300) is connected to each chassis pin (520) in a penetrating manner, two ends of the lead-out sheet (300) are respectively a connecting end and a lead-out end, the connecting end is arranged in the accommodating cavity and is electrically connected with the coil body (550), and the lead-out end extends out of the accommodating cavity.

4. A dc contactor according to claim 3, wherein the bobbin base plate (510) has a rectangular shape, four chassis pins (520) are connected to four corners of the bobbin base plate (510), and the lead-out sheet (300) is injection-molded on the chassis pins (520); four of the lead-out pieces (300) are divided into two coil lead-out pins (310) and two auxiliary contact lead-out pieces (320).

5. A direct current contactor according to claim 3, wherein the length direction of the magnetic conductive cylinder (430) is perpendicular to the plane of the yoke base plate (410), the length direction of the carrier tube (530) is perpendicular to the plane of the coil base plate (510), and the yoke base plate (410) is sandwiched between the coil base plate (510) and the cavity wall of the housing cavity.

6. The direct current contactor according to claim 2, wherein the contact module (600) comprises a pole piece (610), the yoke side plate (420) is riveted to the pole piece (610), and the bobbin is sandwiched between the yoke base plate (410) and the pole piece (610).

7. The direct current contactor according to claim 2, wherein the yoke base plate (410) has a through-hole (201) at a corner thereof, and the through-hole (201) and a wall of the accommodating chamber form the avoiding hole.

8. The direct current contactor according to claim 1, wherein a plurality of chassis pins (520) are provided, each chassis pin (520) is fixedly connected with one lead-out sheet (300) electrically connected with the coil body (550), the number of through holes is the same as and corresponds to the number of chassis pins (520), and the number of avoiding holes is the same as and corresponds to the number of chassis pins (520).

9. The direct current contactor according to any of claims 1-8, wherein the outer housing comprises an upper housing (100) and a lower housing plate (200) detachably connected to the upper housing (100), a receiving groove is provided at the bottom of the upper housing (100), the lower housing plate (200) closes the receiving groove, and the receiving groove and the lower housing plate (200) form the receiving cavity.

10. The direct current contactor according to claim 9, wherein a through hole (201) is formed in an edge of the lower shell plate (200), and the through hole (201) and a groove wall of the receiving groove form the through hole.