CN112289642A

CN112289642A - Low-voltage direct current contactor and production process thereof

Info

Publication number: CN112289642A
Application number: CN202011150971.6A
Authority: CN
Inventors: 瓦磊
Original assignee: Shenzhen Jinquan Technology Co ltd
Current assignee: Shenzhen Jinquan Technology Co ltd
Priority date: 2020-10-24
Filing date: 2020-10-24
Publication date: 2021-01-29
Anticipated expiration: 2040-10-24
Also published as: CN112289642B

Abstract

The application relates to the field of contactors, in particular to a low-voltage direct-current contactor and a production process thereof, and the low-voltage direct-current contactor comprises an outer shell and a control assembly, wherein the control assembly comprises an upper housing, a base and a lower housing; the control assembly is connected with an external control cabinet through a connecting end; the connecting end is arranged at the side wall of the lower housing; the control assembly comprises a power piece, the power piece comprises a coil, a coil support for installing the coil and a suction piece, a group of coil pins connected with the coil are arranged on two end faces of the coil support, the number of each group of coil pins is consistent with the number of the leads of the coil, the coil pins correspond to the leads of the coil one by one, and the coil pins are connected with a coil male end. The application also provides a production technology of the low-voltage direct-current contactor for producing and preparing the coil support, and the production technology has the advantages that automation can be realized in winding, tin dipping and testing links, and the production efficiency of the whole process is improved.

Description

Low-voltage direct current contactor and production process thereof

Technical Field

The application relates to the field of contactors, in particular to a low-voltage direct-current contactor and a production process thereof.

Background

The contactor is divided into an alternating current contactor and a direct current contactor, and is applied to electric power, power distribution and power utilization occasions. The contactor is an electric appliance which utilizes a coil to flow current to generate a magnetic field in industrial electricity to close a contact so as to control a load.

General contactor, including the shell body, the shell body includes the base and the cover body, fixedly connected with is used for the main contact of being connected with the main loop and the control contact who is connected with control circuit on the base, through being connected main contact and main loop, control contact and control circuit are connected, and the coil has been placed to the shell body is inside, and control circuit and coil intercommunication, the on-off control through control circuit produces or disappears the break-make that magnetic force controlled the main loop through the coil break-make electricity.

The wiring terminal of common coil is the patchcord connection, and when the coil was connected external circuit, need the manual work to make the first welding with the tip of coil, inefficiency, the operation is complicated.

Chinese patent publication No. CN107978489B discloses a double-coil contactor and a circuit control system, which includes an electromagnetic mechanism and a contact mechanism, the electromagnetic mechanism includes: coil support, start coil and the holding coil of suit in order from interior to exterior to and two coil wiring ends, the contact mechanism includes: auxiliary movable contact piece, auxiliary static contact piece. The auxiliary movable contact piece, the auxiliary static contact piece and the two coil wiring ends are arranged on the end face of the coil support.

The contactor disclosed in the above document avoids the above connection process by wire welding, improves production efficiency, and the coil connection is connected to the outside through the auxiliary static contact, and when the control circuit is connected, the connection point of the control circuit needs to be connected to the terminal of the coil through a wire-wrapping or clamping member, and when the contactor is manufactured and tested, the time consumption is long, and the production efficiency is reduced.

Disclosure of Invention

In order to solve the problems that the time consumption is long and the production efficiency is reduced when the contactor completes the test in production and preparation, the application provides a low-voltage direct-current contactor and a production process thereof.

In a first aspect, the present application provides a low-voltage dc contactor, which adopts the following technical scheme:

a low-voltage DC contactor comprises a contactor body,

the outer shell is used for protecting internal components and comprises an upper shell, a base and a lower shell which are sequentially connected, wherein a main contact used for being connected with a main loop is arranged on one side, facing the upper shell, of the base;

the control assembly is arranged in a cavity formed by the lower housing, is connected with an external control cabinet through a connecting end and is used for receiving a control signal to control the on-off of the main loop; the connecting end is arranged on the side wall of the lower cover shell;

the control assembly includes power spare, power spare includes the coil, installs the coil's coil carrier and inhales the piece, two terminal surfaces of coil carrier all are provided with a set of coil pin of being connected with the coil, every group the quantity of coil pin is unanimous and the one-to-one with the wire quantity of coil, and one of them is a set of the coil pin is connected with the public end of coil, the public end outside of coil is provided with the terminal shell and forms with the terminal shell the link.

Through adopting above-mentioned technical scheme, this application is through the hole site at the coil former edge increase coil contact pin, and after the contact pin was assembled to the coil, can realize automatic wire winding, automatic tin sticky and automatic test, reduced because the patchcord is made the head, the welding, wrapped, produce the tin point easily when making the head welding and wrap and lead to coil enameled wire lacquer layer damage easily, the coil generates heat when adding the electricity, causes the condition appearance that the coil short circuit burns out.

Meanwhile, the coil pin is connected with the coil male end, the coil male end and the terminal shell form a connecting end, namely the connecting end is in a wiring terminal form, and only the matched terminal needs to be used for plugging in the using process. The wiring mode among the correlation technique is screwed up with nut and terminal and is connected, and inefficiency when leading to test and in-service use installation, this application adopts the mode of terminal grafting, reduces the time of wiring in-process by a wide margin, also is convenient for carry out automated testing simultaneously, and the automatic degree of difficulty of current wiring mode is great, and the automatic degree of difficulty of the wiring mode of this application is compared the degree of difficulty and is lower. To sum up, insert the cooperation to the link through the coil, all can realize automaticly in wire winding, tin sticky and test link, promote the production efficiency of whole process.

And the main contact in this application is located the both sides of base respectively with control assembly's link, is parted by the base between main contact and the link to increase between main circuit and control circuit's the creepage distance, reduced the risk that main circuit punctures control circuit, simultaneously because only need install the main contact on the base, can reduce the volume of base, and then make whole low pressure DC contactor's volume less, thereby make the low pressure DC contactor's of this application scope wider.

Preferably, a lead block protrudes from the coil support between the coil pins, and a lead slot is formed in the lead block.

Through adopting above-mentioned technical scheme, wire piece and wire casing play the guide effect to the wire when carrying out the wire winding operation for the wire is difficult for changing when twining, guarantees wire-wound stability.

Preferably, the main contact comprises an active contact and a main stationary contact, the main stationary contact is two stationary reeds respectively connected with the main loop, a gap is reserved between the two stationary reeds, and the active contact can be abutted against the two stationary reeds;

the control assembly further comprises a transmission mechanism, the power part comprises a coil and a suction part, the transmission mechanism comprises a transmission rod, and two ends of the transmission rod are respectively fixedly connected with the suction part and the active contact.

By adopting the technical scheme, a structural mode of the main contact and the control assembly is provided specifically but not restrictively, and under the condition that the control circuit is not used as the only explanation, after the coil is electrified by the control circuit, the coil generates magnetism so as to adsorb the attraction part, the attraction part drives the driving contact to move to the state that the driving contact is mutually contacted with the two static reeds through the transmission rod, and the main circuit is communicated through the mutual contact of the driving contact and the two static reeds, so that the control of the main circuit is realized.

Preferably, the end part of the transmission rod, which is provided with the active contact, is provided with a pad bowl, an auxiliary pressure spring is arranged between the pad bowl and the active contact, the auxiliary pressure spring and the pad bowl are sequentially arranged in the direction away from the main stationary contact.

Through adopting above-mentioned technical scheme, through addding and filling up bowl and pressure spring, fill up the bowl and be used for fixed and fixed auxiliary spring, the pressure spring is used for making the contact between active contact and the stationary reed inseparable, is difficult for breaking away from.

Preferably, the base side wall is provided with a mounting plate, and the mounting plate and the base are integrally formed.

Through adopting above-mentioned technical scheme, contactor is in the installation in the correlation technique, need install the metal support and install on the base, in this application, through setting up the mounting panel, need not to set up the metal support, the material of mounting panel can select for the plastics material, and then has reduced the whole weight of contactor, has reduced the volume of contactor simultaneously for the low pressure direct current contactor's of this application scope is wider.

Preferably, the device further comprises an auxiliary contact, wherein the auxiliary contact is mounted inside the lower cover shell.

By adopting the technical scheme, the auxiliary contact is used for control, for example, the auxiliary contact is used for realizing when a self-locking and interlocking circuit is required.

Preferably, the auxiliary contact is a printed circuit board and a control module installed on the printed circuit board, the control module includes a start winding and a holding winding, the control module is used for receiving a signal of a control circuit and controlling switching of power on and power off of the start winding and the holding winding, when the control module receives the signal of the control circuit, the start winding is powered on, the holding winding is powered off, and when the main contact is closed, the start winding and the holding winding are connected in series and powered on.

Through adopting above-mentioned technical scheme, this application replaces mechanical auxiliary contact through printed circuit board, has avoided the problem of contact surface oxidation to make auxiliary contact be difficult for inefficacy, when control module accepted control circuit's signal, the start winding circular telegram, keep the winding outage, thereby make said main contact closure, only need less electric current among the control module this moment both can keep the connected state of main loop, then start winding and keep winding series connection and circular telegram, reduce the electric current among the control module.

Preferably, the control module further comprises,

a first diode, the anode of which is coupled with the signal input end of the control circuit, the cathode of which is coupled with the holding winding, the holding winding is connected with the starting winding in series, and the other end of the starting winding is coupled with the signal output end of the control circuit;

the delay circuit area is used for receiving the voltage signal of the control circuit and outputting a gradually increased voltage signal, and one end of the delay circuit area is coupled with the connection point of the control circuit and the first diode;

and the grid electrode of the switch tube is coupled with the time delay circuit area, the drain electrode of the switch tube is coupled with the connection point of the first diode and the holding winding, and the source electrode of the switch tube is coupled with the connection point of the holding winding and the starting winding.

By adopting the technical scheme, after the control circuit is electrified, the voltage of the delay circuit area is gradually increased, when the voltage of the delay circuit area is increased to the rated voltage of the grid electrode of the switching tube, the switching tube is conducted to enable the starting winding to be electrified, the maintaining winding is powered off, so that the main contact is closed, then the output voltage of the control circuit is reduced, the switching tube is in a conduction ending state, the starting winding and the maintaining winding are connected in series and electrified, and the control circuit enters into a maintenance state.

Preferably, the delay circuit area includes a delay circuit area,

the anode of the second diode is coupled to the connection point of the control circuit and the first electrode tube;

a first resistor, one end of which is coupled to the cathode of the first diode, and the other end of which is coupled to the gate of the switching tube;

one end of the first capacitor is coupled to the connection point of the first resistor and the switch tube, and the other end of the first capacitor is coupled to the drain of the switch tube;

and one end of the second resistor is coupled to the connection point of the first resistor and the switching tube, and the other end of the second resistor is coupled to the drain of the switching tube.

Through adopting above-mentioned technical scheme, after control circuit circular telegram, the power charges to first electric capacity to make the voltage at first electric capacity both ends rise gradually, thereby make the grid voltage of switch tube can not sudden change, thereby the protection switch tube is not fragile.

In a second aspect, the present application provides a production process of a low-voltage dc contactor, which adopts the following technical scheme:

a production process of a low-voltage direct current contactor is used for producing the low-voltage direct current contactor and comprises the following steps,

s1, placing the coil support in a vibration disc for feeding;

s2, transporting the coil support to the next procedure;

s3, feeding the coil support to a winding machine for twice winding;

s4, conveying the coil support to a vehicle-carrying jig to a welding machine for soldering tin;

s5, unloading the coil support, conveying the coil support to a testing machine to transfer the jig to the testing machine, and performing a winding test;

s6, distinguishing qualified products from unqualified products after testing;

and S7, automatically arranging the finished coil support for standby by using a robot arm.

By adopting the technical scheme, the production preparation and the test of the coil support are automated, and the production efficiency of the whole process is improved.

In summary, the present application includes at least one of the following beneficial technical effects:

according to the coil inserting and testing device, the coil inserting and testing method and the coil inserting and testing device, the coil inserting and testing device is matched with the connecting end, automation can be achieved in winding, tin dipping and testing links, and production efficiency of the whole process is improved;

the contactor increases the creepage distance between the main loop and the control loop, and reduces the risk that the main loop breaks down the control loop;

the contactor is provided with the mounting plate, so that a metal bracket is not required to be arranged;

this application replaces mechanical auxiliary contact through printed circuit board, has avoided the problem of contact surface oxidation to make auxiliary contact be difficult for becoming invalid.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of a low-voltage dc contactor according to the present application.

Fig. 2 is a schematic structural diagram of another perspective of an embodiment of a low-voltage dc contactor according to the present application.

Fig. 3 is a schematic diagram of an internal structure of an embodiment of a low-voltage dc contactor according to the present application.

Fig. 4 is a front view of a coil support according to an embodiment of the low voltage dc contactor of the present application.

Fig. 5 is a cross-sectional view a-a of fig. 4.

Fig. 6 is a schematic circuit diagram of an auxiliary contact of an embodiment of a low-voltage dc contactor according to the present application.

Description of reference numerals:

1. an outer housing; 11. an upper housing; 12. a base; 121. mounting a plate; 122. mounting holes; 13. a lower housing shell;

2. a control component; 21. a connecting end; 211. a terminal housing; 212. a coil male end; 22. a power member; 221. a coil; 222. an armature; 223. a suction member; 23. a transmission mechanism; 231. a transmission rod; 232. a bowl is padded; 233. an auxiliary pressure spring; 234. an insulating sleeve; 235. a contact bridge; 236. a coil support; 2361. inserting a coil into a pin; 2352. a lead block; 2363. a wire guide groove; 237. a coil sheath; 24. a main pressure spring;

3. a main contact; 31. an active contact; 32. a main stationary contact; 321. a stationary reed; 322. a connecting bolt; 3221. a spring pad; 3222. a nut;

4. an auxiliary contact; 41. a printed circuit board; 42. a control module; 421. starting a winding; 422. a holding winding; 423. a delay circuit area; d1, a first diode; MOS and a switching tube; d2, a second diode; d3, zener diode; r1, a first resistor; r2, a second resistor; c1, a first capacitance.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses a low-voltage direct current contactor. Referring to fig. 1, a low voltage dc contactor includes an outer housing 1 and a control assembly 2.

Referring to fig. 1 and 2, the outer casing 1 is used for protecting internal components and includes an upper casing 11, a base 12 and a lower casing 13 connected in sequence, and a main contact 3 for connecting with a main circuit is disposed on a side of the base 12 facing the upper casing 11. The outer housing 1 may be plastic or other non-conductive material. The upper housing 11 is used for dust prevention and arc interruption, the base 12 is used for supporting and mounting the main contact 3, connecting the upper housing 13 and the lower housing 13, and the lower housing 13 is used for dust prevention and insulation and provides a holding space for a user.

Referring to fig. 1 and 2, the control component 2 is installed in a cavity formed by the lower casing 13, and is connected to an external control cabinet through a connection end 21 for receiving a control signal to control the opening and closing of the main loop; the connection end 21 is provided at a side wall of the lower shroud shell 13. The main contact 3 and the connecting end 21 are respectively positioned at two sides of the base 12, so that the creepage distance between the main loop and the control loop is increased, and the risk that the main loop breaks down the control loop is reduced.

Go up for dismantling between housing 11 and the base 12 to be connected, optionally the buckle is connected, also can be through threaded connection, for dismantling the connection between base 12 and the lower housing 13, optionally the buckle is connected, also can be through threaded connection. In the application, the upper cover shell 11 or the lower cover shell 13 is connected with the base 12 in a buckling mode, hidden troubles caused by screw fastening in the related technology are eliminated, the cover shell is connected and fixed through screws, insufficient or excessive tightening force can occur in the preparation process, the dust-proof grade of a loose product is reduced in the upper cover shell 11 or the lower cover shell 13 when the tightening force is insufficient, contact arcs overflow due to gaps, and a control loop and a main loop are in short circuit to cause product failure. Excessive tightening force causes damage to the upper case 11 or the lower case 13 during the manufacturing process, thereby allowing the snap-fit connection, reducing the occurrence of such a situation,

referring to fig. 2, specifically, the connection end 21 is a plug terminal, the connection end 21 includes a terminal housing 211 and a coil male end 212, and the terminal housing 211 is fixedly connected to a side wall of the lower housing 13; the coil male end 212 is located inside the terminal housing 211, and one end of the coil male end 212 is connected to the control module 2, and the other end is used for connecting to a control circuit. The plug terminal is a common connection mode, the form of the plug terminal is used in the application, the connection end 21 is convenient to connect with the control circuit, and the plug is convenient to save time.

Referring to fig. 2, a mounting plate 121 is disposed on a side wall of the base 12, the mounting plate 121 is made of the same material as the base 12 and is integrally formed with the base 12, and two mounting holes 122 are formed in the mounting plate 121 for mounting and fixing the contactor. Contactor need install the metal support on base 12 in the installation among the correlation technique, and in this application, through setting up mounting panel 121, need not to set up the metal support, the material of mounting panel 121 can select for the plastics material, and then has reduced the whole weight of contactor, has reduced the volume of contactor simultaneously for the low pressure direct current contactor's of this application scope is wider.

Referring to fig. 1 and 3, the main contact 3 includes an active contact 31 and a main stationary contact 32, the main stationary contact 32 includes two stationary leaves 321 connected to the main circuit, a gap is left between the two stationary leaves 321, and the active contact 31 can abut against the two stationary leaves 321. The control component 2 comprises a power part 22 and a transmission mechanism 23, the power part 22 comprises a coil 221 and an attraction part 223, the attraction part 223 is made of ferromagnetic materials and can be selected as a cylindrical iron block, the transmission mechanism 23 comprises a transmission rod 231, and two ends of the transmission rod 231 are fixedly connected with the attraction part 223 and the active contact 31 respectively. Given a structure of the main contact 3 and the control component 2, without being taken as a sole explanation, when the control circuit energizes the coil 221, the coil 221 generates magnetism to attract the attraction piece 223, the attraction piece 223 drives the driving contact 31 to move to the point where the driving contact 31 contacts with the two stationary leaves 321 through the transmission rod 231, and the driving contact 31 contacts with the two stationary leaves 321 to connect the main circuit, thereby realizing the control of the main circuit.

Referring to fig. 3, in this embodiment, the coil 221 is fixed by a coil 221 bracket, the coils 221 are fixedly installed inside the lower casing 13, and can be fixed by gluing, snap-fit, or by bolts, the coil 221 is wound around the coil 221 bracket, and a coil sheath 237 is sleeved outside the coil 221 to protect the coil 221. The coil sheath 237 improves the insulation and the pressure resistance strength between the coil 221 and the yoke 222, and a PET adhesive tape is used for wrapping in the related technology, so that the insulation and the pressure resistance of a product are affected due to aging of the PET adhesive tape along with time, temperature and environment, and the insulation mode can cause the hidden trouble that the insulation or the pressure resistance strength and the like are not up to the standard. Above-mentioned problem is solved to this application coil sheath 237, and the front of coil sheath 237 can be used to laser engraving product label simultaneously, eliminates current label subsides to promote the durability of label.

Referring to fig. 4 and 5, two end surfaces of the coil 221 support are respectively provided with a set of coil pins 2361 connected to the coil 221, the number of each set of coil pins 2361 is the same as the number of the wires of the coil 221 and corresponds to one another, one set of coil pins 2361 is connected to the coil male end 212, and the coil male end 212 is externally provided with the terminal housing 211 and forms the aforementioned connection end 21 with the terminal housing 211. The coil 221 and the winding head of the two windings are ensured, so that the automatic processing procedure of the coil 221 is realized, the consistency and the reliability of the coil 221 are improved, the productivity of the coil 221 is improved, the states of semi-automatic winding, manual head forming, welding and wrapping of the existing product are avoided, and the hidden troubles that a tin tip is easily generated during welding of the existing coil 221 head forming, the enameled wire paint layer is easily damaged during wrapping and the short circuit is burnt are avoided; in the design of the application, the pin at the other end of the coil 221 is simultaneously used as the pin of a product control loop, so that the connection through rate and reliability of the control loop are ensured.

Further, a wire guide block 2362 protrudes from the coil 221 bracket between the coil pins 2361, and a wire guide groove 2363 is formed on the wire guide block 2362. Wire piece 2362 and wire groove 2363 play the guide effect to the wire when carrying out the wire winding operation for the wire is difficult for changing when twining, guarantees wire-wound stability.

Referring to fig. 3, further, the end fixedly connected with pad bowl 232 of the driving contact 31 is equipped with to the transmission rod 231, the pad bowl 232 is a round cake shape, be provided with supplementary pressure spring 233 between pad bowl 232 and the driving contact 31, supplementary pressure spring 233 sets gradually with pad bowl 232 along the direction of keeping away from main stationary contact 32, supplementary pressure spring 233 lower extreme is provided with insulating cover 234, insulating cover 234 lower extreme is provided with contact bridge 235, contact bridge 235 and driving contact 31 fixed connection, through addding pad bowl 232 and pressure spring, pad bowl 232 is used for fixed and fixed auxiliary spring, the pressure spring is used for making the contact between driving contact 31 and the stationary spring piece 321 inseparable, be difficult for breaking away from.

With continued reference to fig. 3, further, an armature 222 is disposed inside the coil 221, the armature 222 is fixedly connected to the inner wall of the lower housing 13, the armature 222 is shaped like a cylinder and forms an electromagnet with the coil 221, so as to increase magnetism, and when the coil 221 is powered on, the attraction piece 223 is more easily attracted, and the sensitivity of the contactor is increased.

Continuing to refer to fig. 3, in this embodiment, a main compression spring 24 is disposed between the armature 222 and the attraction member 223, a placing groove for placing the main compression spring 24 is disposed at both an end of the armature 222 facing the attraction member 223 and an end of the attraction member 223 facing the armature 222, the main compression ring is located in the placing groove, two ends of the main compression spring 24 respectively abut against the armature 222 and the attraction member 223, when the armature 222 and the attraction member 223 are attracted to each other, the main compression spring 24 is compressed to provide a restoring force for the attraction member 223, so that after a power failure occurs, the attraction member 223 can be restored to an initial state to break a main loop.

Referring to fig. 3, each stationary spring 321 is fixedly connected to a connecting bolt 322, and an elastic pad 3221 and a nut 3222 are sequentially disposed on the connecting bolt 322. The connecting bolt 322 is used for connecting with the main loop, and connects two contacts of the main loop with the connecting bolt 322, and then the two contacts are locked by using the nut 3222, so that the connection is stable, and the elastic pad 3221 makes the nut 3222 not easy to slip and the locking stable.

Referring to fig. 3 and 6, the low voltage dc contactor of the present application further includes an auxiliary contact 4, and the auxiliary contact 4 is installed inside the lower case 13. The auxiliary contact 4 is used for control, for example, when a self-locking and interlocking circuit is needed, the auxiliary contact 4 is used for realization.

The auxiliary contact 4 is a printed circuit board 41 and a control module 42 mounted on the printed circuit board 41, the control module 42 includes a start winding 421 and a hold winding 422, the control module 42 is configured to receive a signal from a control circuit and control switching of the start winding 421 and the hold winding 422, when the control module 42 receives the signal from the control circuit, the start winding 421 is powered on, the hold winding 422 is powered off, and when the main contact is closed, the start winding 421 and the hold winding 422 are connected in series and powered on.

Referring to fig. 6, in detail, the control module 42 includes a first diode D1, a delay circuit block 423, and a switching MOS. The anode of the first diode D1 is coupled to the signal input terminal of the control circuit, the cathode of the first diode D1 is coupled to the hold winding 422, the hold winding 422 is connected in series with the start winding 421, and the other end of the start winding 421 is coupled to the signal output terminal of the control circuit. The delay circuit block 423 receives the voltage signal from the control circuit and outputs a gradually increasing voltage signal, and one end of the delay circuit block 423 is coupled to a connection point between the control circuit and the first diode D1. The gate of the switching transistor MOS is coupled to the delay circuit region 423, the drain of the switching transistor MOS is coupled to the connection point of the first diode D1 and the hold winding 422, and the source of the switching transistor MOS is coupled to the connection point of the hold winding 422 and the start winding 421.

After the control circuit is powered on, the voltage of the delay circuit region 423 is gradually increased, when the voltage of the delay circuit region 423 is increased to the rated grid voltage of the switching tube MOS, the switching tube MOS is switched on to enable the starting winding 421 to be powered on, the maintaining winding 422 is powered off, so that the main contact 3 is closed, then the output voltage of the control circuit is reduced, the switching tube MOS is switched off, the starting winding 421 and the maintaining winding 422 are connected in series and powered on, and the control circuit enters a maintaining state.

Specifically, the delay circuit block 423 includes a second diode D2, a first resistor R1, a first capacitor C1, a second resistor R2, and a zener diode D3. The anode of the second diode D2 is coupled to the connection point of the control circuit and the first electrode tube. One end of the first resistor R1 is coupled to the cathode of the first diode D1, and the other end of the first resistor R1 is coupled to the gate of the switching transistor MOS. One end of the first capacitor C1 is coupled to the connection point of the first resistor R1 and the switching tube, and the other end of the first capacitor C1 is coupled to the drain of the switching tube MOS. One end of the second resistor R2 is coupled to the connection point of the first resistor R1 and the switching tube, and the other end of the second resistor R2 is coupled to the drain of the switching tube MOS. One end of the zener diode D3 is coupled to the gate of the switching transistor MOS, and the other end of the zener diode D3 is coupled to the source of the switching transistor MOS.

After the control circuit is powered on, the power supply charges the first capacitor C1, so that the voltage at two ends of the first capacitor C1 gradually rises, the grid voltage of the MOS cannot suddenly change, and the MOS is protected from being damaged easily. The voltage stabilizing diode D3 is connected between the grid and the source of the switch tube MOS, so that the grid voltage is stabilized in a specified working voltage range, and the breakdown damage caused by the overlarge voltage between the grid and the source of the switch tube MOS is reduced.

The implementation principle of a low-voltage direct current contactor in the embodiment of the application is as follows: this application is through the hole site that increases coil contact pin 2361 at coil 221 frame edge, coil 221 assembles the back of coil contact pin 2361, can realize automatic wire winding, automatic tin sticky and automatic test, reduced because the patchcord makes the head, the welding, wrap, produce tin point easily when making the head welding and wrap and lead to coil 221 enameled wire lacquer layer damage easily, coil 221 generates heat when adding electricity, cause the condition appearance that coil 221 short circuit burns out.

Meanwhile, the coil pin 2361 is connected with the coil male end 212, the coil male end 212 and the terminal shell 211 form a connecting end 21, namely the connecting end 21 is in a wiring terminal form, and only a terminal matched with the connecting end is needed to be used for plugging in the using process. The mode of connection among the correlation technique is screwed up with nut 3222 and terminal and is connected, and inefficiency when leading to test and in-service use installation, this application adopts the mode of terminal grafting, reduces the time of wiring in-process by a wide margin, also is convenient for carry out automated test simultaneously, and the automatic degree of difficulty of current mode of connection is great, and the automatic degree of difficulty of mode of connection of this application compares the degree of difficulty and is lower. In conclusion, the coil pins 2361 are matched with the connecting ends 21, automation can be achieved in winding, tin dipping and testing links, and production efficiency of the whole process is improved.

And main contact 3 in this application and control assembly 2's link 21 are located the both sides of base 12 respectively, it is separately by base 12 between main contact 3 and the link 21, thereby increase between the creepage distance with main loop and control circuit, the risk that main loop punctures control circuit has been reduced, simultaneously because only need install main contact 3 on base 12, can reduce the volume of base 12, and then make whole low pressure direct current contactor's volume less, thereby make the low pressure direct current contactor's of this application scope wider.

The embodiment of the application also discloses a production process of the low-voltage direct current contactor, which is used for producing the low-voltage direct current contactor and comprises the following steps,

s1, placing the coil 221 support in a vibration disc for feeding, wherein the vibration disc enables the coil 221 support to feed in a designated direction;

s2, conveying the coil 221 bracket to the next process, wherein the coil 221 bracket can be conveyed through a conveyor belt;

s3, feeding the coil 221 support to a winding machine for twice winding;

s4, feeding the coil 221 support to a vehicle-carrying jig, conveying the coil 221 support to a welding machine for soldering, and soldering coil pins 2361 on two sides of the coil 221 support;

s5, unloading the coil 221 bracket to a test machine turnover jig, and conveying the coil 221 bracket to the test machine for winding test;

s6, distinguishing qualified products from unqualified products after testing, and automatically grabbing by using a robot;

and S7, automatically rolling the finished coil 221 support by using a robot arm for standby.

The implementation principle of the production process of the low-voltage direct-current contactor in the embodiment of the application is as follows: the production preparation and the test of the coil 221 support are automated, and the production efficiency of the whole process is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A low-voltage direct current contactor is characterized in that: comprises the steps of (a) preparing a mixture of a plurality of raw materials,

the outer shell (1) is used for protecting internal components and comprises an upper shell (11), a base (12) and a lower shell (13) which are sequentially connected, wherein a main contact (3) used for being connected with a main loop is arranged on one side, facing the upper shell (11), of the base (12);

the control component (2) is arranged in a cavity formed by the lower cover shell (13), is connected with an external control cabinet through a connecting end (21), and is used for receiving a control signal to control the opening and closing of the main loop; the connecting end (21) is arranged at the side wall of the lower cover shell (13);

control assembly (2) are including power spare (22), power spare (22) are including coil (221), coil (221) support and the piece (223) of inhaling of installation coil (221), two terminal surfaces of coil (221) support all are provided with a set of coil (221) contact pin of being connected with coil (221), every group the quantity of coil (221) contact pin is unanimous and the one-to-one with the wire quantity of coil (221), wherein a set of coil (221) contact pin is connected with coil public end (212), coil public end (212) outside is provided with terminal shell (211) and forms with terminal shell (211) link (21).

2. A low voltage dc contactor according to claim 1, wherein: the coil (221) support is located and protrudes between a group of coil (221) contact pins to form a wire block (2352), and a wire guide groove (2363) is formed in the wire block (2352).

3. A low voltage dc contactor according to claim 1, wherein: the main contact (3) comprises an active contact (31) and a main static contact (32), the main static contact (32) comprises two static reeds (321) which are respectively connected with a main loop, a gap is reserved between the two static reeds (321), and the active contact (31) can be abutted against the two static reeds (321);

the control assembly (2) further comprises a transmission mechanism (23), the power part (22) comprises a coil (221) and an attraction part (223), the transmission mechanism (23) comprises a transmission rod (231), and two ends of the transmission rod (231) are respectively fixedly connected with the attraction part (223) and the active contact (31).

4. A low voltage dc contactor according to claim 3, wherein: the end part of the driving contact (31) mounted on the transmission rod (231) is provided with a pad bowl (232), an auxiliary pressure spring (233) is arranged between the pad bowl (232) and the driving contact (31), the auxiliary pressure spring (233) and the pad bowl (232) are sequentially arranged in the direction away from the main static contact (32).

5. A low voltage dc contactor according to claim 1, wherein: the side wall of the base (12) is provided with a mounting plate (121), and the mounting plate (121) and the base (12) are integrally formed.

6. A low voltage DC contactor according to any of claims 1-5, characterized in that: the device also comprises an auxiliary contact (4), wherein the auxiliary contact (4) is arranged inside the lower cover shell (13).

7. A low voltage dc contactor according to claim 6, wherein: the auxiliary contact (4) is a printed circuit board (41) and a control module (42) installed on the printed circuit board (41), the control module (42) comprises a starting winding (421) and a holding winding (422), the control module (42) is used for receiving a signal of a control circuit and controlling the on-off switching of the starting winding (421) and the holding winding (422), when the control module (42) receives the signal of the control circuit, the starting winding (421) is electrified, the holding winding (422) is electrified, and when the main contact (3) is closed, the starting winding (421) and the holding winding (422) are connected in series and electrified.

8. A low voltage dc contactor according to claim 7, wherein: the control module (42) further comprises,

a first diode (D1), an anode of which is coupled to a signal input terminal of the control circuit, a cathode of which is coupled to the hold winding (422), the hold winding (422) being connected in series with the start winding (421), the other end of the start winding (421) being coupled to a signal output terminal of the control circuit;

a delay circuit region (423) for receiving the voltage signal of the control circuit and outputting a gradually increasing voltage signal, one end of which is coupled to a connection point of the control circuit and the first diode (D1);

a switching transistor (MOS) having a gate coupled to the delay circuit region (423), a drain coupled to a connection point of the first diode (D1) and the hold winding (422), and a source coupled to a connection point of the hold winding (422) and the start winding (421).

9. A low voltage dc contactor according to claim 8, wherein: the delay circuit region (423) includes,

a second diode (D2), the anode of which is coupled to the connection point of the control circuit and the first electrode tube;

a first resistor (R1) having one end coupled to the cathode of the first diode (D1) and the other end coupled to the gate of a switching transistor (MOS);

a first capacitor (C1), one end of which is coupled to the connection point of the first resistor (R1) and the switching tube, and the other end of which is coupled to the drain of the switching tube (MOS);

and a second resistor (R2), one end of which is coupled to the connection point of the first resistor (R1) and the switching tube, and the other end of which is coupled to the drain of the switching tube (MOS).

10. A process for producing a low-voltage dc contactor, for producing a low-voltage dc contactor according to any one of claims 1 to 9, characterized in that:

s1, placing the coil (221) bracket in a vibration disc for feeding;

s2, conveying the coil (221) bracket to the next process;

s3, feeding the coil (221) support to a winding machine for twice winding;

s4, feeding the coil (221) support to a vehicle loading jig, and conveying the coil to a welding machine for soldering tin;

s5, blanking the coil (221) support, conveying the coil support to a testing machine to transfer a jig to the testing machine, and performing a winding test;

s6, distinguishing qualified products from unqualified products after testing;

and S7, automatically swinging the finished coil (221) bracket for standby by using a robot arm.