CN209962974U

CN209962974U - Switching component and non-polar contactor thereof

Info

Publication number: CN209962974U
Application number: CN201920364561.8U
Authority: CN
Inventors: 谢宪陪
Original assignee: Juen Electric (shanghai) Co Ltd
Current assignee: Juen Electric (shanghai) Co Ltd
Priority date: 2019-03-21
Filing date: 2019-03-21
Publication date: 2020-01-17
Anticipated expiration: 2029-03-21

Abstract

The utility model discloses a switching component and a non-polar contactor thereof, wherein the switching component comprises a first switch and a second switch; one end of the first wiring board and one end of the second wiring board are respectively in conductive connection with the first electric connection end and the second electric connection end of the first wiring board; the first wiring board is also provided with a first output end and a second output end which are electrically connected with the first power connection end and the second power connection end respectively, the first output end is electrically connected with the input end of the first change-over switch, and the output end of the first change-over switch is electrically connected with the first coil input wire of the first coil; the second electricity connecting end is electrically connected with a second coil incoming line of the second coil, a first coil outgoing line of the first coil and a second coil outgoing line of the second coil are respectively electrically connected with an incoming end of the second change-over switch, an outgoing end of the second change-over switch is electrically connected with an outgoing end of the second wiring board, and the outgoing end of the second wiring board is electrically connected with one end of the third wiring board.

Description

Switching component and non-polar contactor thereof

Technical Field

The utility model relates to a contactor especially relates to a switching module and nonpolarity contactor thereof.

Background

The DC control high-power contactor is a high-power switch electric appliance which remotely controls a circuit (closing, opening or switching) through a low-current low-voltage DC electromagnet, and mainly comprises two parts: electrical contact systems (moving and static contacts) and electromagnetic systems. And the structure mostly adopts a double-breakpoint bridge contact and a solenoid suction type magnetic system.

The existing non-polar contactor has the following defects:

1) the magnetic steel of the existing direct current contactor is square, so that the distribution of a magnetic field is limited, a cavity cannot be effectively utilized, and if the contactor is aged after being used for a long time, electric arcs are not easily extinguished.

2) The existing contactor basically adopts double coils, one coil is a starting coil, the other coil is a holding coil, and generally one of the two coils is used. The mode is mainly for energy saving, but the existing double coils are controlled (switched) by adopting an electronic circuit, so that the cost is high, the control is complex and the number of fault points is large.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned defect of the prior art, the utility model aims to solve the technical problem that a switching module and non-polar contactor thereof are provided, it has better arc extinguishing performance, and simple structure can realize the control between two coils through change over switch.

In order to achieve the above object, the present invention provides a switching assembly, which includes a first switch and a second switch, wherein the first switch and the second switch are respectively used for controlling the on-off of the current between the first connection wire, the second connection wire, the third connection wire and the first coil and the second coil; one end of the first wiring board and one end of the second wiring board are respectively in conductive connection with the first electric connection end and the second electric connection end of the first wiring board;

the first wiring board is also provided with a first connection outlet end and a second connection outlet end which are electrically connected with the first connection end and the second connection end respectively, the first connection outlet end is electrically connected with the connection end of the first change-over switch, and the connection outlet end of the first change-over switch is electrically connected with the first coil connection wire of the first coil;

the second electricity connecting end is electrically connected with a second coil access wire of the second coil, a first coil connection wire of the first coil and a second coil connection wire of the second coil are respectively electrically connected with an access end of the second change-over switch, an output end of the second change-over switch is electrically connected with an output end of the second wiring board, and the output end of the second wiring board is electrically connected with one end of the third wiring board.

Preferably, the other ends of the first connection wire and the second connection wire are in conductive connection with the outlet end of the first plug; the other end of the third connection wire is in conductive connection with the output end of the second plug.

Preferably, in the initial state, one of the first switch and the second switch is in an open state, and the other is in a closed state, and once the trigger ends of the first switch and the second switch are triggered, the states of the first switch and the second switch are respectively and simultaneously switched.

Preferably, the trigger ends of the first switch and the second switch are respectively opposite to the trigger part of the switching top plate, and the trigger part can trigger the trigger ends of the first switch and the second switch at the same time.

Preferably, the switching top plate is further provided with a top plate fixing part, and the top plate fixing part is fixed on the ejector rod.

Preferably, the switching top plate is fixed on the ejector rod, one end of the ejector rod is arranged in the reset blind groove of the fixing head and sleeved with the fixing head, and the fixing head can slide in the axial direction of the ejector rod; and a first pressure spring is sleeved on the part of the ejector rod, which is positioned between the switching top plate and the closed end of the reset blind groove.

Preferably, the other end of the ejector rod penetrates through the movable plate and the magnetism isolating plate and then is assembled with a driving cylinder installed in an inner hole of a coil frame in an axially sliding mode, the inner hole of the coil frame is formed in the coil frame, coil frame discs are arranged at two ends of the coil frame respectively, a coil installation groove is formed between the two coil frame discs, and the first coil and the second coil are installed in the coil installation groove respectively;

the driving cylinder is provided with a countersunk hole, and a second pressure spring is sleeved on the part of the ejector rod, which is located between the matching convex cylinder and the end face of the countersunk hole.

The utility model also discloses a nonpolarity contactor, its special application has above-mentioned switching module.

Preferably, the ceramic shell further comprises a first shell and a fixing head, a second shell is fixed in the first shell, a support ring is fixed at the top of the second shell, a support plate is arranged on the support ring, an insulating partition plate is arranged on the support plate, the support plate is positioned on the two sides of the insulating partition plate and is respectively assembled and fixed with a first binding post and a second binding post, and one end of each of the first binding post and the second binding post respectively penetrates through the fixing frame and then is installed in a ceramic inner shell of the ceramic shell;

the fixed frame is respectively provided with a first wiring board, a second wiring board, a first change-over switch and a second change-over switch;

a conductive block is fixed on the fixed head and used for connecting current between the first binding post and the second binding post under the driving of the ejector rod; the ceramic shell is made of insulating ceramic;

the ceramic shell is clamped and fixed in a ceramic fixing groove, the ceramic fixing groove is arranged on a fixing convex column of a fixing frame, a first clamping bulge, a second clamping bulge, a third clamping bulge and a fourth clamping bulge are further arranged on the fixing convex column, a clamping table and clamping groove plates are matched, at least two clamping groove plates are arranged, a magnetic steel mounting groove is formed between the two clamping groove plates, and a clamping notch is formed between the clamping groove plates and the outer wall of the fixing convex column;

the first clamping bulge, the second clamping bulge, the third clamping bulge, the fourth clamping bulge, the matched clamping table and the clamping groove plate are respectively arranged on two outer side surfaces of the fixed convex column; the first wiring board is fixedly clamped between the first clamping bulge and the second clamping bulge on one side, and the second wiring board is fixedly clamped between the first clamping bulge and the second clamping bulge on the other side; the fourth clamping bulge on one side is matched with the clamping table to clamp and fix the first change-over switch, and the fourth clamping bulge on the other side is matched with the clamping table to clamp and fix the second change-over switch;

the matched convex cylinder is arranged on the movable plate, the movable plate is also provided with clamping bulges, positioning convex cylinders and a magnetic steel mounting table, the two clamping bulges are a pair and are arranged in pairs, each pair of clamping bulges is respectively clamped and assembled with the bottom of the ceramic shell, the movable plate is clamped with the magnetic isolation plate between the movable plate and the coil frame disc close to the movable plate, the coil frame disc is provided with the positioning bulges and the clamping plates, and the positioning bulges penetrate through the magnetic isolation plate and are clamped and assembled with positioning holes in the positioning convex cylinders;

the clamping plate penetrates through the magnetism isolating plate and the movable plate, a clamping hole is formed in the penetrating end of the clamping plate, and the clamping hole is clamped and assembled with the third clamping protrusion;

the magnetic steel is arranged in the magnetic steel mounting groove, clamping flanges are respectively arranged on two sides of the magnetic steel, a pressing notch is arranged at the top of the magnetic steel, and a matching cambered surface is arranged at one end close to the inner wall of the second shell;

the clamping flange is assembled with the clamping notch in a clamping mode, the pressing notch is assembled with the pressing convex block in a clamping mode, the magnetic steel is pressed towards the magnetic steel mounting table through the pressing convex block, and the pressing convex block is arranged on the fixing frame.

Preferably, a limiting ring is fixed on the inner wall of the inner hole of the coil rack, a limiting part is further arranged on the driving cylinder, and the limiting part is matched with the limiting ring to limit the maximum displacement of the driving cylinder moving downwards towards the closed end of the second shell; the first coil and the second coil are respectively and coaxially installed with the ejector rod; the ejector rod and the switching top plate are made of high-temperature-resistant materials.

The utility model has the advantages that:

the utility model discloses a set up first change over switch, second change over switch and can control the operating condition switching between first coil, the second coil, its structure is very simple, the cost is on the low side, controls also very simply moreover. Compared with the existing circuit switching mode, the manufacturing cost is at least 5 times lower, and only one fault point is the first change-over switch and the second change-over switch, so that the fault rate and the overhauling workload are greatly reduced.

The utility model discloses a magnet steel and mount constitute magnetic steel components, and its magnet steel adopts the design of cooperation cambered surface, can effectively increase its volume, has also just also increased magnetic field intensity, thereby makes the utility model discloses better arc extinguishing performance has. In addition, the magnetic steel is clamped and assembled with the clamping notch groove through the clamping flange, and then is pressed in the pressing notch groove through the pressing convex block 184, so that the magnetic steel can be effectively fixed, and the magnetic steel is prevented from loosening.

The utility model discloses a ejector pin, switch roof, first pressure spring, second pressure spring, conducting block and constitute the ejector pin subassembly, its operating condition that can realize the intercommunication of first terminal, second terminal and first coil, second coil simultaneously switches, and the design is very dexterous, and the cost is not high, and the reliability is better, has fine marketing prospect.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic structural diagram of the present invention.

Fig. 4 is a sectional view a-a in fig. 3.

Fig. 5 is a sectional view B-B in fig. 3.

Fig. 6 is a schematic diagram of the internal structure of the present invention.

Fig. 7 is a schematic view of the internal structure of the present invention.

Fig. 8 is a schematic view of the internal structure of the present invention.

Fig. 9 is a schematic view of the internal structure of the present invention.

Fig. 10 is a cross-sectional view C-C of fig. 9.

Fig. 11 is a schematic view of the fixing frame of the present invention.

Fig. 12 is a schematic view of the fixing frame of the present invention.

Fig. 13 is a schematic structural diagram of the top rod of the present invention.

Fig. 14 is a schematic view of the internal structure of the present invention.

Fig. 15 is a schematic diagram of the connection of the first coil, the second coil, the first switch and the second switch of the present invention.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

referring to fig. 1 to 15, the non-polar contactor of the present embodiment includes a first outer shell 110, a second outer shell 130 is fixed inside the first outer shell 110, a support ring 120 is fixed on the top of the second outer shell 130, a support plate 121 is arranged on the support ring 120, an insulating partition plate 122 is arranged on the support plate 121, portions of the support plate 121 located on both sides of the insulating partition plate 122 are respectively assembled and fixed with a first terminal 211 and a second terminal 212, one end of each of the first terminal 211 and the second terminal 212 is connected with two lead wires to be connected and disconnected, and the other end of each of the first terminal 211 and the second terminal 212 is respectively inserted into a ceramic inner shell 191 of a ceramic shell 190 after passing through a fixing frame 180;

the ceramic shell 190 is made of insulating ceramics, the ceramic shell 190 is clamped and fixed in a ceramic fixing groove 1826, the ceramic fixing groove 1826 is arranged on the fixing convex column 182 of the fixing frame 180, the fixing convex column 182 is further provided with a first clamping protrusion 1821, a second clamping protrusion 1822, a third clamping protrusion 1823, a fourth clamping protrusion 1825, a matching clamping table 1824 and clamping groove plates 183, at least two clamping groove plates 183 are arranged, a magnetic steel mounting groove 181 is formed between the two clamping groove plates 183, and a clamping notch 1831 is formed between the clamping groove plates 183 and the outer wall of the fixing convex column 182;

the first clamping protrusion 1821, the second clamping protrusion 1822, the third clamping protrusion 1823, the fourth clamping protrusion 1825, the matching clamping table 1824 and the clamping slot plate 183 are respectively arranged on two outer side surfaces of the fixed convex column 182; the first clamping protrusion 1821 and the second clamping protrusion 1822 on one side clamp and fix the first wiring board 251, and the first clamping protrusion 1821 and the second clamping protrusion 1822 on the other side clamp and fix the second wiring board 252; the first switch 241 is clamped and fixed between the fourth clamping protrusion 1825 and the matching clamping table 1824 on one side, and the second switch 242 is clamped and fixed between the fourth clamping protrusion 1825 and the matching clamping table 1824 on the other side;

the first wiring board 251 and the second wiring board 252 have the same structure, and the first switch 241 and the second switch 242 have the same structure, in this embodiment, the first switch 241 and the second switch 242 may adopt one or any combination of a button switch, a micro switch, a button switch, and the like; one ends of the first connection wire 231 and the second connection wire 232 are electrically connected with the outlet end of the first plug 221, and the other ends of the first connection wire 231 and the second connection wire 232 are respectively electrically connected with the first electric connection end and the second electric connection end of the first wiring board 251;

the first wiring board 251 is further provided with a first connection end and a second connection end which are electrically connected with the first connection end and the second connection end respectively, the first connection end is electrically connected with the connection end of the first switch 241, the connection end of the first switch 241 is electrically connected with the first coil connection wire 311 of the first coil 310, and therefore the current connection and disconnection between the first wiring 231 and the first coil 310 can be controlled through the first switch 241;

the second connection end is electrically connected to the second coil connection line 321 of the second coil 320, the first coil connection line 312 of the first coil 310 and the second coil connection line 322 of the second coil 320 are electrically connected to the connection end of the second switch 242, respectively, the connection end of the second switch 242 is electrically connected to the connection end of the second connection board 252, the connection end of the second connection board 252 is electrically connected to one end of the third connection wire 233, and the other end of the third connection wire 233 is electrically connected to the connection end of the second plug 222. Thereby enabling the third wiring 233 to draw out a current from the tap-out end of the second changeover switch 242.

In use, the first plug 221 and the second plug 222 are respectively electrically connected to an external power source for controlling the contactor, wherein the power source may be a battery or a constant current source, so that the direct current of the control coil can be respectively connected to the first coil and the second coil.

In the initial state, one of the first switch 241 and the second switch 242 is in an open state, and the other is in a closed state, and when the trigger terminals of the first switch 241 and the second switch 242 are triggered, the states of the first switch 241 and the second switch 242 are simultaneously switched.

In this embodiment, when the initial state is selected, the first switch 241 is closed and the second switch 242 is opened, and at this time, the first coil 310 is a start coil and the second coil 320 is a hold coil.

The triggering ends of the first switch 241 and the second switch 242 are respectively opposite to the triggering portion 442 of the switch top plate 440, and when in use, the triggering portions 442 at the two ends of the switch top plate 440 trigger the first switch 241 and the second switch 242 at the same time. The switching top plate 440 is further provided with a top plate fixing portion 441, and the top plate fixing portion 441 is fixed to the top bar 410.

The switching top plate 440 is fixed on the top rod 410, one end of the top rod 410 is installed in the reset blind groove 471 of the fixing head 470 and is sleeved with the fixing head 470, and the fixing head 470 can slide in the axial direction of the top rod 410;

a first compression spring 450 is sleeved on a part of the push rod 410 between the switching top plate 440 and the closed end of the reset blind groove 471, and the first compression spring 450 provides the functions of damping and keeping the close contact with the fixed head 470 when in use.

The fixed head 470 is fixed with a conductive block 460, and the conductive block 460 overlaps the end faces of the first terminal post 211 and the second terminal post 212 respectively in the axial projection direction of the first terminal post 211. When the conductive block 460 is in contact with the end faces of the first terminal post 211 and the second terminal post 212, respectively, the current between the first terminal post 211 and the second terminal post 212 is conducted, and at this time, the trigger is in a closed state. When the conductive block 460 is separated from the end faces of the first terminal post 211 and the second terminal post 212, respectively, the current between the first terminal post 211 and the second terminal post 212 is cut off, and at this time, the trigger is in an off state.

The other end of the top rod 410 passes through the movable plate 170 and the magnetism isolating plate 160 and then is assembled with the driving cylinder 420 installed in the coil frame inner hole 155 in an axial sliding manner, the coil frame inner hole 155 is arranged inside the coil frame 150, a limiting ring 154 is fixed on the inner wall of the coil frame inner hole 155, two ends of the coil frame 150 are coil frame discs 151 respectively, a coil installing groove 156 is formed between the two coil frame discs 151, the first coil 310 and the second coil 320 are installed in the coil installing groove 156 respectively, and the first coil 310 and the second coil 320 are installed coaxially with the top rod 410 respectively. The driving cylinder 420 is installed in the driving guide cylinder 140 and can move axially upward to grip the coil, and the driving guide cylinder 140 is fixed in the coil frame inner hole 155.

The driving cylinder 420 is provided with a limiting part 422 and a counter bore 421, a second pressure spring 430 is sleeved on a part of the ejector rod 410 between the end surfaces of the matching convex cylinder 174 and the counter bore 421, and the limiting part 422 is matched with the limiting ring 154, so that the maximum displacement of the driving cylinder 420 moving downwards towards the closed end of the second housing 130 is limited.

The matching convex cylinder 174 is arranged on the movable plate 170, the movable plate 170 is further provided with a pair of clamping protrusions 171, a positioning convex cylinder 172 and a magnetic steel mounting table 173, the two clamping protrusions 171 are arranged in pairs, each pair of clamping protrusions 171 are respectively clamped and assembled with the bottom of the ceramic shell 190 so as to fix the ceramic shell 190, the magnetic isolation plate 160 is clamped between the movable plate 170 and the coil frame disc 151 close to the movable plate, the coil frame disc 151 is provided with a positioning protrusion 152 and a clamping plate 153, and the positioning protrusion 152 penetrates through the magnetic isolation plate 160 and then is clamped and assembled with a positioning hole in the positioning convex cylinder 172, so that the positioning effect is provided for the installation of the magnetic isolation plate 160 and the movable plate 170.

The fastening plate 153 penetrates through the magnetism isolating plate 160 and the movable plate 170, and a fastening hole 1531 is formed on the penetrating end, and the fastening hole 1531 is fastened and assembled with the third fastening protrusion 1823, so as to assemble and fix the fixing frame 180 and the coil rack 150;

the ceramic shell 190 is further provided with a movable notch 192, and the conductive block 460 passes through the movable notch 192 and enters the ceramic inner shell 191, so that the conductive block 460 can move in the axial direction of the jack rod relative to the ceramic shell 190.

A magnetic steel 270 is installed in the magnetic steel installation groove 181, clamping flanges 272 are respectively arranged on two sides of the magnetic steel 270, a pressing notch 271 is arranged at the top of the magnetic steel 270, and a matching arc surface 273 is arranged at one end close to the inner wall of the second shell;

the setting of cooperation cambered surface 273 is different from the tradition and sets up magnet steel 270 into the shape of square, and this kind of design makes magnet steel can fix better between second shell 130 and magnet steel mounting groove 181 on the one hand, and on the other hand can increase the volume of magnet steel to increase the magnetic field intensity of magnet steel, just also make this contactor have better arc extinguishing performance.

The clamping flange 272 and the clamping groove 1831 are clamped and assembled, so that the magnetic steel 270 is fixed on two sides of the clamping flange 272;

the pressing notch 271 and the pressing protrusion 184 are engaged and assembled, and the pressing protrusion presses the magnetic steel 270 against the magnetic steel mounting table 173, so as to provide fixing action at two ends of the magnetic steel 270. The pressing protrusion 184 is disposed on the fixing frame 180.

The second housing 130 and the magnetic isolation plate 160 are made of materials capable of isolating a magnetic field, so that the magnetic fields of the first coil, the second coil and the magnetic steel are prevented from being exposed, and the performance and other equipment are not influenced. In this embodiment, the second housing 130 and the magnetic isolation plate 160 may be yokes, or made of the same material as the yokes, so as to increase the magnetic field strength of the first coil, the second coil, and the magnetic steel.

Preferably, a first contact piece 461 is fixed at the conductive part of the conductive block 460, which is in contact with the first terminal post 211 and the second terminal post 212, respectively, and a second contact piece 462 in contact with the first contact piece 461 is arranged on the first terminal post 211 and the second terminal post 212, respectively. During the use, through first contact 461 and the second contact electrically conductive that corresponds with it can realize the break-make of electric current between first terminal and the second terminal, this kind of design can make conducting block 460 can be stable, put through the electric current between first terminal and the second terminal fast, and can reduce electric arc.

In an initial state, the conductive block is separated from the first binding post and the second binding post respectively, and at the moment, the first binding post and the second binding post are in a disconnected state.

When the first wiring terminal and the second wiring terminal need to be connected, the first wiring, the second wiring and the third wiring are electrified, and current respectively enters the first coil and the second coil; at this moment, the magnetic field generated by the first coil and the second coil pushes the driving cylinder to the conducting strip at the same time, so that the first terminal and the second terminal are switched on by the conducting strip, the second pressure spring compresses the matching convex cylinder at this moment, the first pressure spring compresses the top plate fixing part 441, namely the second pressure spring and the first pressure spring stores elasticity, the trigger part 442 triggers the first switch 241 and the second switch 242 respectively, so that the first switch 241 is switched off and the second switch 242 is switched on, at this moment, the second coil is kept powered on and the first coil is powered off, namely, the second coil is kept by the conducting block to switch on the first terminal and the second terminal. When the first wiring column and the second wiring column need to be disconnected, the first wiring column, the second wiring column and the third wiring column are disconnected, the ejector rod 410 resets under the action of the first pressure spring and the second pressure spring, so that the conductive blocks are separated from the first wiring column and the second wiring column respectively, the trigger part is separated from the trigger ends of the first change-over switch 241 and the second change-over switch 242 respectively, the first change-over switch 241 and the second change-over switch 242 recover to the initial state, namely the first change-over switch 241 is closed, and the second change-over switch 242 is disconnected.

Preferably, the ejector rod and the switching top plate are made of high-temperature-resistant materials, such as stainless steel. Compared with the existing ejector rod made of nylon, the ejector rod is high in stability. Because the existing contactor is made of nylon, when the temperature of the ejector rod is higher than the set temperature, the ejector rod can be melted and deformed, and the whole contactor cannot be used.

The details of the present invention are well known to those skilled in the art.

The foregoing has described in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be devised by those skilled in the art in light of the teachings of the present invention without undue experimentation. Therefore, the technical solutions that can be obtained by a person skilled in the art through logic analysis, reasoning or limited experiments based on the prior art according to the concepts of the present invention should be within the scope of protection defined by the claims.

Claims

1. A switch assembly, characterized by: the switching circuit comprises a first change-over switch and a second change-over switch, wherein the first change-over switch and the second change-over switch are respectively used for controlling the on-off of current among a first connection wire, a second connection wire, a third connection wire, a first coil and a second coil; one end of the first wiring board and one end of the second wiring board are respectively in conductive connection with the first electric connection end and the second electric connection end of the first wiring board;

2. The switch module of claim 1, wherein: the other ends of the first connection wire and the second connection wire are in conductive connection with the output end of the first plug; the other end of the third connection wire is in conductive connection with the output end of the second plug.

3. The switch module of claim 1, wherein: in the initial state, one of the first switch and the second switch is in an open state, and the other is in a closed state, and once the trigger ends of the first switch and the second switch are triggered, the states of the first switch and the second switch are respectively switched simultaneously.

4. The switch module of claim 1, wherein: the triggering ends of the first change-over switch and the second change-over switch are respectively opposite to the triggering part of the switching top plate, and the triggering parts can trigger the triggering ends of the first change-over switch and the second change-over switch simultaneously.

5. The switch module of claim 1, wherein: the switching top plate is also provided with a top plate fixing part which is fixed on the ejector rod.

6. The switching module according to claim 4 or 5, characterized by: the switching top plate is fixed on the ejector rod, one end of the ejector rod is arranged in the reset blind groove of the fixing head and sleeved with the fixing head, and the fixing head can slide in the axial direction of the ejector rod; and a first pressure spring is sleeved on the part of the ejector rod, which is positioned between the switching top plate and the closed end of the reset blind groove.

7. The switch module of claim 6, wherein: the other end of the ejector rod penetrates through the movable plate and the magnetism isolating plate and then is assembled with a driving cylinder installed in an inner hole of the coil frame in an axial sliding mode, the inner hole of the coil frame is formed in the coil frame, coil frame discs are arranged at two ends of the coil frame respectively, a coil installing groove is formed between the two coil frame discs, and the first coil and the second coil are installed in the coil installing grooves respectively;

8. A non-polar contactor is characterized in that: the switching assembly of claim 7 is applied.

9. The non-polar contactor as claimed in claim 8, wherein: the ceramic shell comprises a ceramic shell and is characterized by further comprising a first shell and a fixing head, wherein a second shell is fixed in the first shell, a support ring is fixed at the top of the second shell, a support plate is arranged on the support ring, an insulating partition plate is arranged on the support plate, the support plate is positioned on two sides of the insulating partition plate and is respectively assembled and fixed with a first wiring terminal and a second wiring terminal, and one end of each of the first wiring terminal and the second wiring terminal penetrates through the fixing frame and then is installed in a ceramic inner shell of the ceramic shell;

10. The non-polar contactor as claimed in claim 9, wherein: a limiting ring is fixed on the inner wall of the inner hole of the coil rack, a limiting part is also arranged on the driving cylinder, and the limiting part is matched with the limiting ring so as to limit the maximum displacement of the driving cylinder moving downwards to the closed end of the second shell; the first coil and the second coil are respectively and coaxially installed with the ejector rod; the ejector rod and the switching top plate are made of high-temperature-resistant materials.