CN219917023U - Contactor - Google Patents

Abstract

The utility model belongs to the field of electrical control, and discloses a contactor, which can greatly improve the buffer of redundant kinetic energy of a movable contact without arranging a buffer structure at the bottom of a shell, so that the buffer of redundant kinetic energy of the movable contact can be greatly improved.

Description

Contactor

Technical Field

The utility model belongs to the field of electrical control, and particularly relates to a contactor.

Background

Contactors are elements commonly used in electrical control and consist of electromagnetic systems, contact systems, arc extinguishing systems, and the like. The electromagnetic system is a contactor core component and is a power source of the whole system, so that the stability of the electromagnetic system is particularly important. The electromagnetic system mainly comprises parts such as a coil, a movable iron core, a reaction spring, a buffer piece and the like. Switch contacts arranged in pairs in a circuit are arranged on a static iron core, the static iron core is electrified to attract the movable iron core through the coil to enable the movable contact to be contacted, so that the switch contacts of the circuit are conducted, and kinetic energy generated by mutual magnetic attraction cannot be absorbed completely by the movable contact at the moment of contact of the movable contact, so that vibration or rebound phenomenon can be generated under the action of residual kinetic energy after the movable contact is inevitably contacted, and the contact stability risk of the circuit contacts is caused.

At present, as shown in fig. 1, for the existence of the above situation, the solution in industry is to arrange a plurality of concave structures at the bottom of the shell of the contactor to buffer the redundant kinetic energy of the moving contact, and the principle is as shown in fig. 2, the concave structures form elastic cantilever bearing mechanisms relative to the force generated by the redundant kinetic energy, so when the force is transmitted to the base through the internal skeleton base, the concave structures can play a certain role in buffering, thereby consuming the redundant kinetic energy of the moving contact.

However, this approach is limited in that: 1) The plurality of concave structures cause the complexity of the bottom structure of the shell and more gaps, so that external dust is easier to deposit and is unfavorable for the dustproof effect of the contactor; 2) On the basis of 1), the size of the concave structure can only be limited in a smaller range during design, so that the size of the cantilever part is undersized, and therefore, the buffer effect provided by the concave structure is limited and larger kinetic energy cannot be effectively buffered; 3) On the basis of 1), the plurality of concave structures also enable the overall structural strength of the bottom of the shell to be obviously reduced, so that the service life of the contactor is shortened.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model provides the contactor, and a buffer structure is not required to be arranged at the bottom of the shell, so that the buffer of redundant kinetic energy of the movable contact and the static contact can be greatly improved.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

the utility model provides a contactor, includes the shell, along vertical orientation set up the movable skeleton and the bearing skeleton in the shell from top to bottom, set up in the shell bottom surface and inlay the electromagnetic core of establishing in the bearing skeleton, move the skeleton and set up on the bearing skeleton through the spring, be provided with the movable contact on the movable skeleton, be provided with the stationary contact that corresponds with the movable contact on the shell, its characterized in that includes: the hollow buffer structure is arranged between the lower surface of the bearing framework and the bottom surface of the shell.

Preferably, the hollow buffer structure is a buffer rod formed on the bearing framework and provided with a bending part, and a buffer gap is formed between the buffer rod and the bearing framework.

Further, two ends of the buffer rod are formed on the bearing framework, and the bending parts are respectively located nearby the two ends and are symmetrical.

Still further, the buffer rod has a contact protrusion in the middle thereof, the lowermost end of which is in contact with the bottom surface of the housing.

Further, the bending part is a fillet bending.

Still further, the bending fillet range of the bending portion is R30 to R60, and the buffer clearance range is 5mm to 10mm.

Further, the number of the buffer rods is two, and the two buffer rods are parallel to each other and are respectively positioned at the edges of the opposite sides of the bearing framework.

Compared with the prior art, the utility model has the beneficial effects that:

1. because the contactor comprises the hollow buffer structure which is arranged between the lower surface of the bearing framework and the bottom surface of the shell, the buffer function is realized through the hollow structure on the bearing framework, and the buffer structure can be arranged larger, so that the buffer structure is not required to be arranged at the bottom of the shell, and the buffer of redundant kinetic energy of the movable contact can be greatly improved.

2. Because the middle part of the buffer rod is provided with the contact convex part, the bottommost end of the contact convex part is contacted with the bottom surface of the shell, the buffer rod has the effect of two-stage buffering when the contact convex part is pressed against the bottom surface of the shell, the buffer rods at two sides of the contact convex part are elastically deformed towards the bottom surface of the shell to form the elastic buffering, and the buffer rods at the second stage are elastically deformed by the contact convex part when the contact convex part is pressed against the bottom surface of the shell, so that a stronger buffering effect is realized under the condition that the size of the hollow buffering structure is unchanged.

3. Because the bending part is a fillet bending part, the fillet bending is more beneficial to the occurrence of the integral elastic deformation of the buffer rod, so that the buffer structure effect of the buffer rod is better.

Drawings

FIG. 1 is a schematic view of a prior art bottom structure of a housing;

FIG. 2 is a schematic diagram of a buffer stress in the prior art;

FIG. 3 is a schematic view of a contactor according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a contactor with a housing removed according to an embodiment of the present utility model;

FIG. 5 is an exploded view of FIG. 4;

FIG. 6 is a schematic diagram of a load bearing frame without an excitation coil pack according to an embodiment of the present utility model;

fig. 7 is a partial enlarged view of a portion a in fig. 6.

In the figure: 100. the contactor comprises a contactor body, 10, a housing, 11, a supporting rod, 20, a movable framework, 21, a conducting rod, 20S, a spring, 30, a bearing framework, 30a, an excitation coil pack, 31, a bearing end face, 32, an action cavity, 33, a buffer end face, 331, a buffer rod, 331a, a bending part, 331b, a contact convex part, 40, an electromagnetic iron core, 41, a static iron core, 42 and a movable iron core.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement of the purpose and the effect of the present utility model easy to understand, the following examples specifically describe a contactor of the present utility model with reference to the accompanying drawings, and it should be noted that the description of these embodiments is for helping understanding the present utility model, but not limiting the present utility model.

As shown in fig. 3 to 6, the contactor 100 in the present embodiment includes a housing 10, a movable frame 20, a load frame 30, and an electromagnetic core 40.

The movable frame 20 and the force bearing frame 30 are arranged in the shell 10 from top to bottom in the vertical direction, the electromagnetic iron core 40 is fixedly arranged on the bottom surface of the shell 10 and embedded into the force bearing frame 30 below, the movable frame 20 is elastically arranged on the force bearing frame 30 in the vertical direction through a spring (not shown in the drawing), a movable contact (not shown in the drawing) in a cantilever structure is horizontally arranged on the movable frame 20, a fixed contact (not shown in the drawing) corresponding to the movable contact in the vertical direction is arranged on the shell 10, specifically, a rod-shaped conducting rod 21 is horizontally inserted on the movable frame 20, two ends of the conducting rod 21 respectively form a movable contact protruding downwards, support rods 11 extending towards the movable frame 20 are arranged on two opposite inner walls of the shell 10, and the free ends of the support rods 11 are respectively formed with fixed contacts protruding upwards, so that the inner walls of the shell 10 are provided with switch contacts forming a circuit for the fixed contacts, and when the contactor 100 acts, the conducting rod 21 drives the movable contact to be in contact with the paired fixed contacts, so that the conducting rod 21 forms a conducting connection for the fixed contacts for the circuit switch.

Specifically, the force-bearing skeleton 30 has a force-bearing end face 31 at the upper end, an action chamber 32, and a buffer end face 33 at the lower end, the action chamber 32 is vertically disposed and open at both ends, and an exciting coil pack 30a is further wound between the force-bearing end face 31 and the buffer end face 33.

Specifically, the electromagnetic iron core 40 includes a stationary iron core 41 and a movable iron core 42, which are disposed opposite to each other in the vertical direction and each have a "mountain" shape, the stationary iron core 41 is fixed on the bottom surface of the outer portion 10, and is inserted into the motion cavity 32 through the middle protrusion, the movable iron core 41 is inserted into the motion cavity 32 through the middle protrusion, and the stationary iron core 41 and the movable iron core 42 are elastically connected through a spring in the motion cavity 32, and when the movable iron core 42 moves in place, the force-bearing skeleton 30 is in contact with only two molded surfaces between three protrusions of the movable iron core 42, but is not in contact with protrusions on both sides of the movable iron core 42.

The hollow buffer structure is arranged between the buffer end face 33 and the bottom face of the shell 10, and is a buffer rod 331 formed on the buffer end face 33, the number of the buffer rods 331 is two, and the two buffer rods 331 are parallel to each other and are respectively located at opposite side edges of the buffer end face 33.

As shown in fig. 7, the buffer rod 331 has a bent portion 331a and a contact convex portion 331b, and a buffer gap is formed between the buffer rod 331 and the buffer end face 33, specifically, the bent portion 331a is a rounded corner bend, the rounded corner range thereof is R30 to R60, and the buffer gap ranges from 5mm to 10mm in the vertical direction.

The two ends of the buffer rod 331 are formed on the surface of the buffer end surface 33, and the two bending portions 331a are respectively located near and symmetrical to the two ends of the buffer rod 331, specifically, the hollow space between the buffer rod 331 and the buffer end surface 33 is a rectangular hollow space with rounded corners at two corners of the lower end.

The contact protrusion 331b is formed to be in contact with the middle of the lower end surface of the buffer rod 331, and the lowermost end of the contact protrusion 331b is in contact with the bottom surface of the housing 10, specifically, the contact protrusion 331b is a rectangular protrusion and it is in surface contact with the housing 10.

The buffering process of the buffer rod 331 is described in connection with the embodiments below:

the exciting coil pack 30a moves the movable iron core 42 toward the stationary iron core 41 by current, at the moment of contact between the movable iron core 42 and the stationary contact, excessive kinetic energy is transferred to the buffer rod 331 by impact of the movable iron core 42 on the force bearing frame 30, so that the buffer rod 331 impacts toward the bottom of the housing 10, at this time, the buffer rod 331 forms a secondary buffer between the buffer end face 33 and the bottom of the housing 10, specifically, the first-stage buffer is an elastic buffer formed by elastic deformation of part of the buffer rod 331 on both sides of the contact protrusion 331b toward the bottom of the housing 10 when the contact protrusion 331b abuts against the bottom of the housing 10, and the second-stage buffer is an elastic buffer formed by elastic deformation of all the buffer rods 331 driven by the contact protrusion 331b when the contact protrusion 331b abuts against the bottom of the housing 10.

The above embodiments are preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and various modifications or variations which may be made by those skilled in the art without the inventive effort within the scope of the appended claims remain within the scope of this patent.

Claims (7)

1. The utility model provides a contactor, includes the shell, along vertical orientation set up from top to bottom in this shell move skeleton and load skeleton, set up the shell bottom surface and inlay establish electromagnetic core in the load skeleton move the skeleton and be in through the spring setting on the load skeleton, be provided with the movable contact on the moving skeleton, be provided with on the shell with the stationary contact that the movable contact corresponds, its characterized in that includes:

the hollow buffer structure is arranged between the lower surface of the bearing framework and the bottom surface of the shell.

2. The contactor according to claim 1, wherein:

the hollow buffer structure is a buffer rod which is formed on the bearing framework and provided with a bending part, and a buffer gap is formed between the buffer rod and the bearing framework.

3. The contactor according to claim 2, wherein:

wherein, the both ends of buffer rod form in on the bearing skeleton, the portion of bending is located both ends nearby and symmetry respectively.

4. A contactor according to claim 3, wherein:

wherein, the middle part of buffer rod has the contact convex part, and this contact convex part's bottommost contacts with the bottom surface of shell.

5. The contactor according to claim 2, wherein:

wherein, the bending part is a round corner bending part.

6. The contactor according to claim 5, wherein:

the range of the bending fillet of the bending part is R30 to R60, and the range of the buffer gap is 5mm to 10mm.

7. The contactor according to claim 2, wherein:

the number of the buffer rods is two, and the two buffer rods are parallel to each other and are respectively positioned at the edges of the opposite sides of the bearing framework.