CN209962970U

CN209962970U - DC contactor

Info

Publication number: CN209962970U
Application number: CN201921168905.4U
Authority: CN
Inventors: 黄秋平; 高云雅
Original assignee: Xugewei Technology (shanghai) Co Ltd
Current assignee: Xugewei Technology (shanghai) Co Ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2020-01-17
Anticipated expiration: 2029-07-22

Abstract

The utility model discloses a direct current contactor relates to electrical components, aims at solving the problem that current contactor easily receives sound contact deformation interference influence result of use, and its technical scheme main points are: including the casing, set up the contactor main part in the casing and be used as the coil that starts the generator, the contactor main part includes that two are the branch contact that the symmetry set up and cooperate two moving contacts that divide the contact, two divide the contact to take shape respectively out the butt inclined plane in opposite directions, two butt inclined planes incline towards between the two and horizontal symmetry, the moving contact stretches into between two branch contacts, and the shaping has two mating surfaces on the moving contact on two butt inclined planes of difference adaptation. The utility model discloses a direct current contactor, its sound contact is more difficult for receiving deformation relatively and influences, and sound contact is not fragile relatively to the result of use is better.

Description

DC contactor

Technical Field

The present invention relates to electrical components, and more particularly, to a dc contactor.

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.

The fixed contact of the contactor comprises two symmetrically arranged branch contacts; the moving contact is plate-shaped, is pushed by the push rod to move towards the fixed contact, and two ends of the length of the moving contact are simultaneously abutted against the two sub-contacts. Because the sound contact divides and shuts the electric arc and the electric current is great when occasionally, so it is in high fever, and this makes it more easily crooked deformation relatively, and this makes the contact after using a period, and the butt that the sound contact can't be laminated again leads to influencing the result of use, consequently needs to propose a new scheme and solves this problem.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a direct current contactor, its sound contact is more difficult for receiving deformation influence relatively, and sound contact is not fragile relatively to the result of use is better.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a direct current contactor, includes the casing, sets up the contactor main part in the casing and is used as the coil that starts the generator, the contactor main part includes that two are the branch contact that the symmetry set up and cooperate two moving contacts that divide the contact, two divide the contact looks end to make up respectively out the butt inclined plane, two butt inclined planes incline towards between the two and horizontal symmetry, the moving contact stretches into between two branch contacts, and the shaping has two fitting surfaces on the moving contact on two butt inclined planes of difference adaptation.

By adopting the technical scheme, the moving contact is abutted against the abutting inclined plane through the matching surface to conduct the two sub-contacts; for past, its butt point of moving contact this moment and the arm of force between its self atress (mobile power source) point reduce by a wide margin to it is relative not flexible deformation more, thereby reduces the contact and damages the probability, the utility model discloses an excellent in use effect.

The utility model discloses further set up to: be provided with between two branch contacts and have elastic bolster, work as the moving contact switches on two branch contacts, moving contact butt bolster.

Through adopting above-mentioned technical scheme, when the moving contact collided the branch contact, its and buffer butt reduced collision speed through the compression bolster to weaken the collision power, thereby reduced and damaged the probability.

The utility model discloses further set up to: the buffer piece is an elastic block.

The utility model discloses further set up to: the buffer piece comprises a first buffer spring, the first buffer spring stretches along the moving direction of the moving contact, and an opposite collision block is fixed at one end, facing the moving contact, of the first buffer spring.

The utility model discloses further set up to: the branch contact comprises a static end block and a movable end block, a sliding groove is formed in the static end block, a connecting rod is connected in the sliding groove in a sliding mode, one end of the connecting rod extends out of the sliding groove and is fixed to the movable end block, a second buffer spring parallel to the connecting rod is arranged between the movable end block and the static end block, the sliding direction of the connecting rod is perpendicular to the moving route of the movable contact, and the abutting inclined plane is arranged on the movable end block.

By adopting the technical scheme, when the moving contact collides with the branch contact, the moving contact is abutted against the moving end block, the moving end block is stressed to compress the second buffer spring, and the second buffer spring is utilized for buffering, so that the damage probability of the moving end block or the branch contact is reduced, and the using effect is better.

The utility model discloses further set up to: the second buffer spring is sleeved on the connecting rod.

By adopting the technical scheme, the connecting rod can be used for guiding the second buffer spring, so that the second buffer spring is prevented from being inclined to interfere with the use effect.

The utility model discloses further set up to: the contactor main body comprises a push rod, the moving contact is fixed on the push rod, a third buffer spring is sleeved on the push rod, one end of the third buffer spring is fixed on the moving contact, and the other end of the third buffer spring is fixed on the static iron core.

Through adopting above-mentioned technical scheme, at the moving contact towards the in-process that divides the contact to remove, third buffer spring is elongated, can be used to the moving contact deceleration, reduces its dynamics of colliding and dividing the contact to reduce the damage probability of contact.

The utility model discloses further set up to: the contactor main body comprises an arc extinguishing chamber, and the branch contact and the moving contact are arranged in the arc extinguishing chamber.

Through adopting above-mentioned technical scheme, can utilize the arc-extinguishing cover to eliminate the electric arc that the contact closed and divides the in-process to produce relatively fast, reduce the influence of the high temperature that electric arc brought to the result of use is better.

To sum up, the utility model discloses following beneficial effect has: the movable contact can extend into the space between the two sub-contacts and abut against the abutting surface by utilizing the matching surface, so that the aim of conducting the two sub-contacts is fulfilled; its butt point of moving contact and the arm of force between its self atress (mobile power source) point at this moment reduce by a wide margin to it is relative more difficult bending deformation, thereby reduces the contact and damages the probability, the utility model discloses an excellent in use effect.

Drawings

FIG. 1 is a schematic longitudinal sectional view illustrating a buffering member of an embodiment as an elastic block;

FIG. 2 is a schematic longitudinal sectional view illustrating a buffering member including a first buffering spring according to a first embodiment;

FIG. 3 is a schematic longitudinal sectional view of the second embodiment.

In the figure: 1. a housing; 11. a box body; 12. a top cover; 13. a sealing plate; 131. an air intake duct; 2. a contactor body; 201. a stationary end block; 202. a movable end block; 203. a chute; 204. a connecting rod; 205. a second buffer spring; 21. a contact is separated; 211. abutting against the inclined plane; 22. a moving contact; 221. a mating surface; 23. a push rod; 231. a third buffer spring; 24. an arc extinguishing chamber; 25. a stationary iron core; 26. a movable iron core; 28. a return spring; 3. a coil; 61. an elastic block; 62. a first buffer spring; 63. and (6) butting against the block.

Detailed Description

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

Example one

The dc contactor, referring to fig. 1, includes a housing 1, a contactor body 2 disposed in the housing 1, and a coil 3 for turning on and off the contactor body 2 to generate power.

The housing 1 is made of an insulating material, such as plastic, and includes a box 11 having an open structure at one end (as shown in the figure), and a top cover 12 fixed to the open end of the box 11 by bolts.

In order to reduce the oxidation probability of the contactor body 2, inert gas is filled in the inner cavity of the box body 11 as protective gas; the inner side of the top cover 12 is fixed with an elastic sealing plate 13 matched with the opening of the inner cavity to enhance the air tightness. An air inlet pipeline 131 for communicating the inner cavity with the outside is inserted in the sealing plate 13, and an end cover adapted to cover the air inlet pipeline 131 is provided.

The contactor main body 2 comprises a fixed contact and a movable contact 22, wherein the fixed contact is divided into two branch contacts 21 which are transversely and symmetrically arranged. The sub-contacts 21 are fixed to the inner side of the sealing plate 13 and extend to the outside of the housing 1 through conductive rods or wires.

The opposite ends of the two sub-contacts 21 are respectively formed with two abutting inclined surfaces 211, the two abutting inclined surfaces 211 are inclined towards one side far away from the sealing plate 13 and are transversely symmetrical, and the two abutting inclined surfaces form an inverted trapezoidal structure in longitudinal section.

The movable contact 22 is provided in a column shape, and the length of the movable contact is perpendicular to the arrangement direction of the two sub-contacts 21, and one end of the movable contact can vertically extend between the two sub-contacts 21. The upward (in the figure) end of the movable contact 22 is opened with a mating surface 221 adapted to the abutting inclined surface 211 on two symmetrical sides, respectively, for abutting and conducting the two sub-contacts 21.

Because the moving contact 22 is not being platelike to divide contact 21 with the both ends side butt collision of board, arm of force length between its point of application of force and the collision point reduces by a wide margin, thereby moving contact 22 at this moment can effectively reduce the problem that crooked deformation brought, thereby the utility model discloses an excellent relatively of result of use.

An elastic buffer is fixed between the two sub-contacts 21 and used for reducing acting force on the sub-contacts 21 when the movable contact 22 collides with the sub-contacts, so that the probability of contact damage is further reduced, and the using effect is better.

The choice of the buffer piece is various, and the preferred two kinds of this embodiment:

A. referring to fig. 1, the buffer member is an elastic block 61 made of high temperature resistant rubber;

B. referring to fig. 2, the buffer member includes a first buffer spring 62, one end of the first buffer spring 62 is fixed to the sealing plate 13, and the other end is fixed with an impact block 63; the expansion and contraction direction of the first buffer spring 62 is parallel to the moving direction of the movable contact 22 and faces the movable contact 22.

Referring to fig. 1, the coil 3 is fixed to the bottom surface of the inner cavity of the case 11, and includes a framework having an i-shaped longitudinal section and a lead wound around the middle of the framework. The skeleton central column of the coil 3 is of a hollow structure; the contactor main body 2 further comprises a push rod 23 for pushing the movable contact 22, wherein one end of the push rod 23, which is far away from the movable contact 22, extends into a central cavity of the framework of the coil 3, and a movable iron core 26 connected to the framework of the coil 3 in a sliding manner is fixed at the end part of the push rod 23. A static iron core 26 is arranged above the movable iron core 26, and the static iron core 26 is penetrated by the push rod 23 and is fixed on the framework of the coil 3; the lower part of the stationary core 26 extends into the central cavity of the bobbin of the coil 3.

When the coil 3 is started, the static iron core 25 attracts the movable iron core 26 to drive the push rod 23 to push the movable contact 22 to move toward the branch contact 21.

Referring to fig. 1 and 2, a return spring 28 is disposed between the stationary core 25 and the movable core 26 so that the movable contact 22 can return to the initial position. The opposite sides of the static iron core 25 and the movable iron core 26 are provided with limiting grooves with opposite opening structures, and the two ends of the return spring 28 are respectively clamped in the two limiting grooves to realize positioning and fixing without blocking the mutual attraction of the two iron cores.

An arc extinguishing chamber 24 is arranged in the box body 11, and the arc extinguishing chamber 24 can be made of arc-resistant ceramics; the branch contact 21 and the movable contact 22 are both positioned in the arc-extinguishing chamber 24, so that electric arcs generated when the contacts are separated and combined by the arc-extinguishing chamber 24 are quickly eliminated, and the damage of high temperature brought by the electric arcs to the contacts is reduced.

In order to reduce the impact speed when the movable contact 22 collides with the sub-contact 21 and protect the sub-contact, a third buffer spring 231 is sleeved on the push rod 23; the movable contact 22 is fixed at the upper end of the push rod 23, and the side surface of the movable contact is positioned outside the side surface of the push rod 23; one end of the third buffer spring 231 is fixed to the movable contact 22, and the other end is fixed to the stationary core 25. According to the above arrangement, when the movable contact 22 moves toward the sub-contact 21, it compresses the return spring 28 and stretches the third buffer spring 231, so that the moving speed of the movable contact 22 becomes smaller; meanwhile, after the impact occurs, the impact absorbing device can also absorb part of the recoil force applied to the movable contact 22 so as to reduce the probability of damage to the movable contact 22.

Example two

The direct current contactor, referring to fig. 1 and fig. 3, is different from the first embodiment in that: the tapping head 21 comprises a stationary end block 201 and a moving end block 202 arranged transversely. The static end block 201 is provided with a transverse sliding chute 203, and one end of the sliding chute 203 facing the movable end block 202 is of an open structure. A connecting rod 204 is slidably connected to the inside of the sliding groove 203, and an end of the connecting rod 204 extends out of the sliding groove 203 and is fixed to the movable end block 202. A second buffer spring 205 is sleeved on the connecting rod 204, one end of the second buffer spring 205 is fixed on the static end block 201, and the other end is fixed on the movable end block 202; the abutment slope 211 is provided on the movable end block 202.

When the moving contact 22 collides with the branch contact 21, the moving block 202 is stressed to compress the second buffer spring 205, and the second buffer spring 205 is utilized to absorb shock and buffer, so that the contact of the utility model is relatively less prone to damage, thereby the use effect is better.

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

1. The utility model provides a direct current contactor, includes casing (1), sets up contactor main part (2) in casing (1) and coil (3) as starting generator, contactor main part (2) include two branch contacts (21) that are the symmetry and set up and cooperate two moving contacts (22) that divide contact (21), its characterized in that: two branch contact (21) are towards the end shaping butt inclined plane (211) respectively mutually, and two butt inclined planes (211) incline towards between the two and horizontal symmetry, moving contact (22) stretch into between two branch contact (21), and the shaping has two mating surfaces (221) of two butt inclined planes (211) of difference adaptation on moving contact (22).

2. The dc contactor as claimed in claim 1, wherein: an elastic buffer is arranged between the two sub-contacts (21), and when the moving contact (22) is conducted with the two sub-contacts (21), the moving contact (22) is abutted to the buffer.

3. The dc contactor as claimed in claim 2, wherein: the buffer member is an elastic block (61).

4. The dc contactor as claimed in claim 2, wherein: the buffer piece comprises a first buffer spring (62), the first buffer spring (62) stretches along the moving direction of the moving contact (22), and an opposite collision block (63) is fixed at one end, facing the moving contact (22), of the first buffer spring (62).

5. The dc contactor as claimed in claim 1, wherein: the branch contact (21) comprises a static end block (201) and a movable end block (202), a sliding groove (203) is formed in the static end block (201), a connecting rod (204) is connected to the sliding groove (203) in a sliding mode, one end of the connecting rod (204) extends out of the sliding groove (203) and is fixed to the movable end block (202), a second buffer spring (205) parallel to the connecting rod (204) is arranged between the movable end block (202) and the static end block (201), the sliding direction of the connecting rod (204) is perpendicular to the moving route of the movable contact (22), and the abutting inclined plane (211) is arranged on the movable end block (202).

6. The direct current contactor as claimed in claim 5, wherein: the second buffer spring (205) is sleeved on the connecting rod (204).

7. The dc contactor as claimed in claim 1, wherein: the contactor main body (2) comprises a push rod (23), the moving contact (22) is fixed on the push rod (23), a third buffer spring (231) is sleeved on the push rod (23), one end of the third buffer spring (231) is fixed on the moving contact (22), and the other end of the third buffer spring is fixed on the static iron core (26).

8. The dc contactor as claimed in claim 1, wherein: the contactor main body (2) comprises an arc extinguishing chamber (24), and the branch contact (21) and the moving contact (22) are both arranged in the arc extinguishing chamber (24).