CN209962960U - DC contactor with built-in energy-saving circuit board - Google Patents

Abstract

The utility model discloses a direct current contactor of built-in energy-conserving circuit board relates to the contactor, aims at solving current contactor, and its energy-conservation is done external design and is leaded to the volume great, and the energy-conserving circuit board problem that easily damages relatively, and its technical scheme main points are: including the casing, set up contactor main part in the casing, be used as start power generator's coil and energy-conserving circuit board, fill inert gas in the inner chamber of casing, the adherence is provided with the installation cavity in the casing, energy-conserving circuit board is fixed in the installation cavity. The utility model discloses a direct current contactor of built-in energy-conserving circuit board, it is whole more compact, and energy-conserving circuit board life is longer relatively.

Description

DC contactor with built-in energy-saving circuit board

Technical Field

The utility model relates to a direct current contactor, more specifically say, it relates to a direct current contactor of built-in energy-conserving circuit board.

Background

The direct current contactor is a contactor used in a direct current loop, is suitable for a programmable power supply or an uninterruptible power supply system, and is applied to the fields of a plurality of new energy resources such as forklifts, electric automobiles and movable electric charging piles.

During the use, after the contactor coil circular telegram, coil current produced the magnetic field, made quiet iron core produce electromagnetic attraction and attract and move the iron core to drive the push rod and remove, make movable contact and stationary contact: at the moment, the normally closed contact is opened, the normally open contact is closed, and the normally closed contact and the normally open contact are linked. When the coil is powered off, the electromagnetic attraction disappears, and the armature is released under the action of the release spring to restore the static contact: the normally open contact is open and the normally closed contact is closed.

When the contactor works, the loss of an iron core of the contactor accounts for the most of active power consumption of an electromagnetic system, and in order to reduce energy consumption and save energy consumption, most of the contactors currently select the contactor to be provided with an energy-saving circuit, and the energy-saving circuit is connected to a coil of the contactor so as to reduce the loss of the iron core and the like; the energy-saving circuit is integrated on a PCB board, which is called energy-saving circuit board for short.

Above-mentioned technical scheme, although can reduce the energy consumption, but energy-conserving circuit board is mostly added outside the contactor with the form of pendant, leads to the volume of contactor bigger relatively, and external direct contact air leads to the easy oxidative damage of component on the board relatively in the energy-conserving circuit board simultaneously, consequently needs to propose a new scheme and solves this problem.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a direct current contactor of built-in energy-conserving circuit board, its whole is more compact, and energy-conserving circuit board life is longer relatively.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a direct current contactor of built-in energy-conserving circuit board, includes the casing, sets up contactor main part in the casing, is used as start power generator's coil and energy-conserving circuit board, fill inert gas in the inner chamber of casing, the adherence is provided with the installation cavity in the casing, energy-conserving circuit board is fixed in the installation cavity.

By adopting the technical scheme, the energy-saving circuit board of the utility model is integrated in the shell, and the integration level is relatively high; and because the inert gas is filled in the shell, the energy-saving circuit board can be protected when the contactor main body is protected, the oxidation probability of the energy-saving circuit board is reduced, and the service life of the product is prolonged.

The utility model discloses further set up to: the casing includes that inner chamber one end is open structure's box body, the inner chamber opening of box body end side lid closes the apron that is connected with the adaptation, the contactor main part is including the static contact that is fixed in the apron, be located the static contact and keep away from the moving contact of apron one side, be fixed in the push rod of moving contact, the push rod is kept away from static contact one side towards the moving contact and is extended, and the end fixing has the movable iron core, the coil encloses to establish and moves the iron core, and is fixed in the box body, it is provided with quiet iron core to move between iron core and the moving contact, quiet iron core is fixed in the coil, the cover is equipped with the answer spring on the push rod, be provided with the arc-extinguishing chamber in the inner.

Through adopting above-mentioned technical scheme, can utilize the arc-extinguishing cover to do the arc extinguishing to the electric arc that produces when the switching of sound contact, avoid electric arc to cause the damage to energy-conserving circuit board, and influence product quality.

The utility model discloses further set up to: the coil comprises a winding framework and a wire ring fixed on the winding framework, two clamping blocks are arranged on the winding framework, the energy-saving circuit board is inserted between the two clamping blocks and is abutted to the two clamping blocks simultaneously.

By adopting the technical scheme, the energy-saving circuit board is clamped and fixed by the two clamping blocks, so that the installation is relatively convenient; simultaneously because the assembly the utility model discloses the time, energy-conserving circuit board can be fixed in the coil earlier, then arranges the casing in again, so assemble better convenience.

The utility model discloses further set up to: the energy-saving circuit board is characterized in that a shielding cover is arranged on the outer cover of the energy-saving circuit board, an inner cavity of the shielding cover is an installation cavity, a clamping port is formed in the clamping block, a side wall plate of the shielding cover is inserted into the clamping port, and an air hole communicated with the installation cavity and the outside is formed in the shielding cover.

Through adopting the technical scheme, the utility model discloses still be provided with the shield cover and do the protection to energy-conserving circuit board to reduce the interference that the magnetic field that the coil produced caused energy-conserving circuit board, thereby optimize product quality.

The utility model discloses further set up to: and the clamping block is in threaded connection with a fastening bolt, and a screw of the fastening bolt penetrates through the shielding cover and the energy-saving circuit board.

Through adopting above-mentioned technical scheme, can utilize fastening bolt to do the enhancement fixed to shield cover and energy-conserving circuit board, prevent that both break away from the mounted position and influence the result of use in the use.

The utility model discloses further set up to: the fastening bolt is an insulating bolt.

By adopting the technical scheme, the use effect that the fastening bolt conducts electricity and interferes with the shielding case and the energy-saving circuit board can be avoided.

The utility model discloses further set up to: the static contact comprises two separated sub-contacts, two conductive screws penetrate and are fixed on the shell from inside to outside, the two conductive screws are fixed on the two sub-contacts respectively, and an insulating isolation cover covers one end, arranged outside the shell, of each conductive screw respectively.

Through adopting above-mentioned technical scheme, two conductive screw arrange the outer one end mutual isolation of casing in, thereby the utility model discloses can reduce the outer probability that switches on of ware of static contact input, output to reinforcing product result of use.

The utility model discloses further set up to: two current conducting plates are arranged outside the shell, two current conducting plates are respectively penetrated by two current conducting screws, the current conducting plates extend towards the opposite sides, and wiring screws are respectively fixed on the opposite sides.

By adopting the technical scheme, at the moment, a worker can connect a lead to the two wiring screws to realize and connect the contactors, namely the wiring screws are used as the wiring ends of the contactors; the isolation is better because the distance between the two terminals is relatively larger.

To sum up, the utility model discloses following beneficial effect has:

1. the energy-saving circuit board is arranged in the shell, and inert gas is filled in the shell, so that the oxidation probability of the energy-saving circuit board is smaller, the service life is longer, the integration level of the utility model is relatively higher, the device is more compact, and the application range is relatively wider;

2. the arc extinguishing cover is arranged in the shell, and the energy-saving circuit board is arranged outside the arc extinguishing cover, so that the electric arc of the contactor is better and is not easy to interfere with the energy-saving circuit board.

Drawings

FIG. 1 is a schematic longitudinal cross-sectional view of the present invention;

fig. 2 is a schematic longitudinal sectional view of a contactor body according to the present invention;

fig. 3 is a schematic longitudinal sectional view of the coil of the present invention.

In the figure: 1. a housing; 101. a separator plate; 1011. a slot; 1012. inserting a block; 11. a box body; 12. a cover plate; 2. a contactor body; 20. a coil; 201. winding a bobbin; 202. a wire loop; 21. static contact; 22. a moving contact; 211. a contact is separated; 23. a push rod; 24. a movable iron core; 25. a stationary iron core; 26. releasing the spring; 27. a return spring; 28. an arc extinguishing chamber; 31. a conductive screw; 32. an isolation cover; 34. a conductive plate; 35. a binding screw; 36. a nut; 4. an energy-saving circuit board; 5. a shield case; 501. a clamping block; 502. a card interface; 51. installing a cavity; 52. air holes; 53. and fastening the bolt.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

A dc contactor incorporating an energy saving circuit board, referring to fig. 1 and 2, includes a case 1, a contactor body 2 disposed in the case 1, a coil 20 serving as a starting power generator, and an energy saving circuit board 4.

The casing 1 is made of plastic and comprises a square box body 11, one end of an inner cavity of the box body 11 is of an open structure, and a cover plate 12 which is matched with the box body is fixed at the opening through bolts.

The contactor main body 2 includes a fixed contact 21, the fixed contact 21 includes two sub-contacts 211, and the two sub-contacts 211 are fixed on the inner side of the cover plate 12 and are distributed in a transverse symmetrical manner. Two conductive screws 31 are fixedly arranged on the cover plate 12 from outside to inside in a penetrating way, and the two conductive screws 31 are respectively connected with the two branch contacts 211 in a threaded way and are used for fixing the branch contacts 211 and facilitating external wiring of the device.

In order to prevent the two conductive screws 31 from being conducted outside the contactor to influence the normal use effect of the contactor in the use process, two isolation covers 32 which respectively cover the heads of the two conductive screws 31 are arranged outside the cover plate 12, and the isolation covers 32 are insulated and can be made of plastic.

An insulating isolation plate 101 is arranged between the two isolation covers 32, and the arrangement of the isolation plate 101 can increase the creepage distance between the heads of the two conductive screws 31 so as to improve the isolation effect. The isolation plate 101 also penetrates into the housing 1 and separates the two sub-contacts 211, so as to prevent the two sub-contacts from being directly conducted to influence the use effect. Isolation cavities are formed between the isolation plate 101 and the two isolation covers 32, and the existence of the isolation cavities can further prevent the arc from conducting the two conductive screws 31.

Referring to fig. 1, a slot 1011 is formed in the isolation plate 101, and the side of the slot 1011 away from the cover plate 12 is an open structure; a matched plug block 1012 is inserted into the slot 1011, and the plug block 1012 extends out from the port of the slot 1011 and transversely extends to be fixed on the two isolation covers 32, so that the two isolation covers 32 are connected into a whole to be convenient to detach.

Referring to fig. 1, conductive plates 34 are disposed on both sides of the isolation plate 101, and a conductive screw 31 is inserted into the cap plate 12 after passing through the conductive plate 34. The two conductive plates 34 extend toward each other toward the opposite sides, and a terminal screw 35 is fixed to each of the opposite ends.

During the use, the staff connects the wire in binding screw 35, and the interval between two wiring ends is bigger relatively this moment to it is better to keep apart the effect.

To facilitate wiring, a binding screw 35 penetrates the conductive plate 34 and penetrates an end-threaded fitting nut 36. The operator can now clamp the connecting wires to the plate 34 by means of the nuts 36.

Referring to fig. 1 and 2, the contactor main body 2 further includes a movable contact 22 located right below the fixed contact 21, the movable contact 22 is plate-shaped, and a vertical projection connects vertical projections of the two sub-contacts 211. A push rod 23 is fixed on the movable contact 22, the push rod 23 extends towards one side far away from the fixed contact 21, and a movable iron core 24 is fixed at the end.

The coil 20 is fixed on the bottom surface of the inner cavity of the case 11 (as shown in the figure), and includes a bobbin 201 and a wire loop 202, wherein the bobbin 201 has an i-shaped longitudinal section, and a wire is wound around the middle of the bobbin 201 to form the wire loop 202. The middle part of the winding framework 201 is hollow to form a sliding groove, and the movable iron core 24 is connected in the sliding groove in a sliding mode, so that the utilization rate of magnetic flux is improved.

A stationary core 25 is disposed between the movable core 24 and the movable contact 22, a lower portion of the stationary core 25 is inserted into a sliding groove formed in a middle portion of the bobbin 201, and an upper portion thereof extends in a lateral direction along an upper portion (shown in the drawing) of the bobbin 201. The push rod 23 is inserted through and connected to the static iron core 25 in a sliding manner.

When the coil 20 is energized to generate a magnetic field, the movable iron core 24 is attracted by the static iron core 25, and simultaneously drives the push rod 23 to move upwards, the push rod 23 drives the movable contact 22 to move upwards to abut against the two sub-contacts 211, and at this time, the contactor is closed.

In order to ensure the normal function of the product by timely resetting the push rod 23, a return spring 27 is sleeved on the push rod 23, one end of the return spring 27 fixes the static iron core 25, and the other end of the return spring abuts against the movable iron core 24. The push rod 23 is also sleeved with a release spring 26, one end of the release spring 26 is fixed on the mounting block on the push rod 23, and the other end is fixedly connected with the movable contact 22; the movable contact 22 is also arranged to slide along the push rod 23, so as to damp and weaken the reaction force applied when the movable contact 22 strikes the fixed contact 21.

Referring to fig. 1, energy-conserving circuit board 4 sets up in the inner chamber of box body 11, and the adherence setting, thereby the utility model discloses an integrated level is higher.

In order to protect the contactor main body 2 and the electronic components of the energy-saving circuit board 4 from oxidation, an inert gas is filled in the box body 11 as a shielding gas.

Referring to fig. 1, in order to prevent the arc generated when the contactor is opened and closed from damaging the energy-saving circuit board 4 and affecting the normal use effect of the contactor main body 2, an arc extinguishing chamber 28 is arranged in the box body 11; the static contact 21 and the movable contact 22 are both arranged in the arc extinguishing cover 28; the lower end of the sub-contact 211 penetrates into the arc extinguishing chamber 28; arc chute 28 may be made of an arc resistant ceramic. The energy-saving circuit board 4 is disposed outside the arc-extinguishing chamber 28, thereby preventing the arc from interfering therewith.

Referring to fig. 1, in order to reduce interference of a magnetic field generated in the use process of the contactor on a circuit on an energy-saving circuit board 4, a shielding case 5 is covered on the energy-saving circuit board 4, and an inner cavity of the shielding case 5 is an installation cavity 51 which is of a lower opening structure; the shield 5 may alternatively be made of a conductive wire mesh coated plastic. In order to ensure that the inert gas can protect the energy-saving circuit board 4, the shielding cover 5 is provided with an air hole 52 for communicating the inner cavity of the shell 1 with the mounting cavity 51.

Referring to fig. 1 and 3, the upper portion of the bobbin 201 transversely extends to the lower portion of the energy-saving circuit board 4, two clamping blocks 501 are fixedly connected to the upper portion of the bobbin, the two clamping blocks 501 are inserted into the lower portion of the energy-saving circuit board 4, and the two clamping blocks 501 are abutted to achieve primary fixing.

A clamping interface 502 is formed in the clamping block 501, and a side wall plate of the shielding case 5 is inserted into the clamping interface 502, so that the shielding case 5 is preliminarily fixed.

In order to improve the fixing effect of the energy-saving circuit board 4 and the shielding case 5, a fastening bolt 53 is connected to the clamping block 501 close to the center side of the housing 1 in a threaded manner, and the screw end of the fastening bolt 53 penetrates through the shielding case 5 and the lower part of the energy-saving circuit board 4 for reinforcing and fixing. The fastening bolt 53 is an insulating bolt, and can be made of plastic to prevent the conductive interference with the use effect of the shielding case 5 and the energy-saving circuit board 4.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims (8)

1. A direct current contactor with a built-in energy-saving circuit board, comprising a case (1), a contactor main body (2) provided in the case (1), a coil (20) used as a starting power generator, and an energy-saving circuit board (4), characterized in that: inert gas is filled in the inner cavity of the shell (1), a mounting cavity (51) is arranged in the shell (1) in a wall attaching mode, and the energy-saving circuit board (4) is fixed in the mounting cavity (51).

2. The dc contactor with built-in energy saving circuit board according to claim 1, wherein: the contactor comprises a shell (1) and a contactor body (2), wherein the shell (1) comprises a box body (11) with an inner cavity of which one end is of an open structure, the side of the inner cavity opening end of the box body (11) is covered and connected with a matched cover plate (12), the contactor body (2) comprises a fixed contact (21) fixed on the cover plate (12), a movable contact (22) located on one side, far away from the cover plate (12), of the fixed contact (21) and a push rod (23) fixed on the movable contact (22), the push rod (23) extends towards one side, far away from the fixed contact (21), of the movable contact (22) and is fixed with a movable iron core (24) at the end part, the movable iron core (24) is enclosed by the coil (20) and is fixed on the box body (11), a fixed iron core (25) is arranged between the movable iron core (24) and the movable contact (22), the fixed iron core (25), the arc extinguishing cover (28) is covered on the static contact (21) and the movable contact (22), and the energy-saving circuit board (4) is located outside the arc extinguishing cover (28).

3. The dc contactor of the built-in power saving circuit board according to claim 2, wherein: coil (20) include wire winding skeleton (201) and fix wire loop (202) on wire winding skeleton (201), be provided with two clamp splice (501) on wire winding skeleton (201), energy-conserving circuit board (4) are pegged graft between two clamp splice (501), and two clamp splice (501) of butt simultaneously.

4. The dc contactor with built-in energy saving circuit board according to claim 3, wherein: the energy-saving circuit board (4) dustcoat is equipped with shield cover (5), the inner chamber of shield cover (5) is installation cavity (51), joint interface (502) have been seted up on clamp splice (501), the side wall board of shield cover (5) is pegged graft in joint interface (502), intercommunication installation cavity (51) and external gas pocket (52) have been seted up on shield cover (5).

5. The dc contactor with built-in energy saving circuit board according to claim 3, wherein: and the clamping block (501) is in threaded connection with a fastening bolt (53), and a screw of the fastening bolt (53) penetrates through the shielding cover (5) and the energy-saving circuit board (4).

6. The dc contactor with built-in energy saving circuit board according to claim 5, wherein: the fastening bolt (53) is an insulating bolt.

7. The dc contactor of the built-in power saving circuit board according to claim 2, wherein: the static contact (21) comprises two separated sub-contacts (211), two conductive screws (31) are fixedly arranged in the shell (1) in a penetrating mode from inside to outside, the two conductive screws (31) are respectively fixed to the two sub-contacts (211), and an insulating isolation cover (32) is respectively covered at one end, outside the shell (1), of each conductive screw (31).

8. The dc contactor with built-in energy saving circuit board according to claim 7, wherein: two current-conducting plates (34) are provided with outward in casing (1), and two current-conducting plates (34) are worn to establish respectively in two conductive screw (31), two current-conducting plate (34) extend towards the side of keeping away from mutually, and the side of keeping away from is fixed with binding screw (35) respectively.

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