CN213042838U

CN213042838U - Low-voltage direct current contactor

Info

Publication number: CN213042838U
Application number: CN202022397229.7U
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: 2021-04-23
Anticipated expiration: 2030-10-24

Abstract

The application relates to the field of contactors, in particular to a low-voltage direct-current contactor, which comprises an outer shell, an upper shell, a base and a lower shell, wherein the outer shell is used for protecting internal components; 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 method has the effect of reducing the risk of control loop breakdown.

Description

Low-voltage direct current contactor

Technical Field

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

Background

Contactors are classified into alternating current contactors (voltage AC) and direct current contactors (voltage DC), and are applied to electric 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.

Contactor among the correlation technique, 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 major loop and the control contact who is connected with control circuit on the base, through being connected main contact and major loop, control contact and control circuit are connected in order to realize the effect of control circuit control major loop break-make.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: in the contactor in the related art, the high voltage of the main circuit risks breaking down the control circuit during use.

Disclosure of Invention

In order to reduce the risk of control loop breakdown, the application provides a low-voltage direct current contactor.

The application provides a low-voltage direct current contactor adopts 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.

Through adopting above-mentioned technical scheme, the main contact in this application is located the both sides of base respectively with control assembly's link, is separated by the base between main contact and the link to increase between the creepage distance with main loop and control circuit, reduced the risk that main loop 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, the connecting end is a plug terminal, which comprises a terminal shell and a coil male end;

the terminal shell is fixedly connected to the side wall of the lower cover shell;

the coil male end is located inside the terminal shell, one end of the coil male end is connected with the control assembly, and the other end of the coil male end is used for being connected with the control loop.

Through adopting above-mentioned technical scheme, this application uses the form of plug terminal, and the link of being convenient for is connected with control circuit, and the convenience of pegging graft saves time.

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 comprises a power part and a transmission mechanism, the power part comprises a coil and an attraction part, the transmission mechanism comprises a transmission rod, and two ends of the transmission rod are respectively fixedly connected with the attraction 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, an armature is arranged in the coil and fixedly connected to the inner wall of the lower housing.

By adopting the technical scheme, the armature and the coil form the electromagnet to increase the magnetism, when the coil is electrified, the attraction part is easier to be adsorbed, and the sensitivity of the contactor is increased.

Preferably, a main pressure spring is arranged between the armature and the absorbing part.

By adopting the technical scheme, the main pressure spring provides a reset force for the attraction part, so that the attraction part can reset to an initial state to disconnect the main loop after power failure.

Preferably, the base side wall is provided with a mounting plate.

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, each static reed is fixedly connected with a connecting bolt, and an elastic pad and a nut are sequentially arranged on the connecting bolt.

Through adopting above-mentioned technical scheme, connecting bolt is used for being connected with the major loop, with the major loop and two contacts are connected with connecting bolt, then through using the nut locking to make the connection stable, the bullet pad makes the difficult smooth silk of nut, and locking is stable.

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 includes an auxiliary stationary spring and an auxiliary movable spring, and the auxiliary stationary spring and the auxiliary movable spring are respectively connected to the coil.

By adopting the technical scheme, an auxiliary contact structure mode is provided specifically but not restrictively, and under the condition that the auxiliary contact structure mode is not used as the only explanation, after the control loop energizes the coil, 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 contacted with the two static reeds through the transmission rod, and the main loop is communicated through the mutual contact of the driving contact and the two static reeds, so that the control of the main loop is realized.

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

according to the low-voltage direct-current contactor, 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;

the application provides a low pressure direct current contactor sets up the mounting panel to need not to set up the metal support.

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.

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; 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. an auxiliary stationary reed; 42. and (5) assisting the movable spring plate.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

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.

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. 3, in particular, but not by way of limitation, main contact 3 includes an active contact 31 and a main stationary contact 32, where main stationary contact 32 includes two stationary leaves 321 connected to a main circuit, respectively, and a gap is left between two stationary leaves 321, and active contact 31 may abut against 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.

In this embodiment, the coil 221 is fixed by the coil 221 bracket, the coil 221 is fixed inside the lower housing 13 by the fixing between the coils 221, and can be fixed by glue, snap-fit by a buckle, or fixed by a bolt, the coil 221 is wound on the coil 221 bracket, and the coil 221 is externally sleeved with the coil sheath 237 to protect the coil 221.

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, 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.

Specifically, but not by way of limitation, the auxiliary contact 4 includes an auxiliary stationary spring 41 and an auxiliary movable spring 42, and the auxiliary stationary spring 41 and the auxiliary movable spring 42 are connected to the coil 221, respectively. After 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 driving contact 31 to be in contact with the two static springs 321 through the transmission rod 231, and the driving contact 31 is in contact with the two static springs 321 to communicate the main circuit, so that the control of the main circuit is realized.

The implementation principle of a low-voltage direct current contactor in the embodiment of the application is as follows: main contact 3 in this application is located the both sides of base 12 respectively with control assembly 2's link 21, it is separately by base 12 between main contact 3 and the link 21, thereby increase between the creepage distance with major loop and control circuit, the risk that the major 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 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 on the side wall of the lower cover shell (13).

2. A low voltage dc contactor according to claim 1, wherein: the connecting end (21) is a plug-in terminal and comprises a terminal shell (211) and a coil male end (212);

the terminal shell (211) is fixedly connected to the side wall of the lower cover shell (13);

the coil male end (212) is located inside the terminal shell (211), one end of the coil male end (212) is connected with the control component (2), and the other end of the coil male end is used for being connected with a control loop.

3. A low voltage dc contactor according to claim 2, 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) comprises a power part (22) and 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 3, wherein: an armature (222) is arranged in the coil (221), and the armature (222) is fixedly connected to the inner wall of the lower cover shell (13).

6. A low-voltage DC contactor according to claim 5, characterized in that: a main pressure spring (24) is arranged between the armature (222) and the suction element (223).

7. A low voltage dc contactor according to claim 3, wherein: the side wall of the base (12) is provided with a mounting plate (121).

8. A low voltage dc contactor according to claim 3, wherein: each static reed (321) is fixedly connected with a connecting bolt (322), and an elastic pad (3221) and a nut (3222) are sequentially arranged on the connecting bolt (322).

9. A low voltage dc contactor according to any of claims 3-8, wherein: the device also comprises an auxiliary contact (4), wherein the auxiliary contact (4) is arranged inside the lower cover shell (13).

10. A low voltage dc contactor according to claim 9, wherein: the auxiliary contact (4) comprises an auxiliary static spring piece (41) and an auxiliary movable spring piece (42), and the auxiliary static spring piece (41) and the auxiliary movable spring piece (42) are respectively connected with the coil (221).