CN217280662U

CN217280662U - Moving contact assembly

Info

Publication number: CN217280662U
Application number: CN202220351313.1U
Authority: CN
Inventors: 吴晓龙; 徐永富; 韦尚靖; 洪诗长; 万海丰; 何双武; 李志强
Original assignee: Zhejiang Chint Electrics Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-08-23
Anticipated expiration: 2032-02-21

Abstract

The utility model provides a moving contact subassembly, the moving contact subassembly includes moving contact casing, moving contact and pivot, and the moving contact is installed in the pivot, and the pivot is rotated and is installed in the moving contact casing, and the one end of moving contact is equipped with the moving contact, and the one end that the moving contact was equipped with the moving contact is worn out from the swing hole of moving contact casing downside, independently encapsulates the moving contact, for current moving contact, static contact and arc extinguishing system circuit breaker polar structure of encapsulating together, has improved insulating nature, can satisfy the insulation requirement under the high voltage.

Description

Moving contact assembly

Technical Field

The utility model relates to a low voltage apparatus field, concretely relates to moving contact subassembly.

Background

At present, the mainstream of low-voltage electric appliances is still in the capacity range of three levels of AC690V and DC1000V, the voltage grade of the molded case circuit breaker is continuously improved along with the technical development of industries such as photovoltaic and the like, the voltage grade is required to reach the grades of AC800V/AC1000V and DC1500V, and the difficulty of insulating high voltage in the homopolar and phase is higher than that of lower voltage.

The existing single-breakpoint moving contact belongs to an open structure, or is sealed in a shell of a single breaker pole together with a static contact and an arc extinguishing mechanism, and for a low-voltage switch electric appliance with a higher voltage level, the moving contact has poor sealing performance, low insulating performance and poor insulating effect.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome prior art's defect, provide a moving contact subassembly.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a moving contact subassembly, the moving contact subassembly includes moving contact casing, moving contact and pivot, and the moving contact is installed in the pivot, and the pivot is rotated and is installed in the moving contact casing, and the one end of moving contact is equipped with the moving contact, and the one end that the moving contact was equipped with the moving contact is worn out from the swing hole of moving contact casing downside.

Optionally, a rotating shaft groove is arranged in the upper region of the moving contact shell, a moving contact swinging groove is arranged in the lower region of the moving contact shell, a swinging hole is formed below the moving contact swinging groove in an open mode, the rotating shaft is installed in the rotating shaft groove, an insulating convex rib is arranged between the rotating shaft groove and the swinging groove for separation, and the insulating convex rib is provided with a via hole through which one end of the moving contact penetrates.

Optionally, the moving contact assembly further includes an arc striking plate, and the arc striking plate is fixedly disposed on a side wall of the moving contact swing groove corresponding to a position where the moving contact is opened to the maximum when the moving contact is opened.

Optionally, when the moving contact is driven to swing by the rotation of the rotating shaft, the radial side wall of the rotating shaft and/or the arc-shaped convex side edge on the radial side wall plugs the via hole.

Optionally, the moving contact assembly further includes a rotating shaft connecting rod and a driving connecting rod, the rotating shaft connecting rod and the rotating center of the rotating shaft are eccentrically arranged, and one end of the driving connecting rod is connected with the rotating shaft connecting rod.

Optionally, the rotating shaft connecting rod is located in the moving contact shell, one end of the driving connecting rod, which is connected with the rotating shaft connecting rod, is located in the moving contact shell, and the top side or the side wall of the upper region of the other end extends out of the moving contact shell.

Optionally, the driving connecting rod includes two driving sub-connecting rods arranged oppositely, one end of each of the two driving sub-connecting rods is connected to both ends of the rotating shaft connecting rod, the other end of each of the two driving sub-connecting rods is bent and connected together and extends outside the moving contact housing, and the moving contact assembly further includes an insulating member, which is arranged between the two driving sub-connecting rods of the driving connecting rod.

Optionally, the moving contact housing includes a moving contact housing top wall and a moving contact housing bottom wall which are opposite to each other, two moving contact housing side walls on opposite sides, two moving contact housing end walls on opposite ends, a swing hole is provided on the moving contact housing bottom wall, a moving contact wiring hole corresponding to the moving contact wiring board is provided on the moving contact housing top wall, and the moving contact is connected with the moving contact wiring board through a wire.

Optionally, the movable contact terminal board closes the contact terminal hole.

Optionally, a fixed boss corresponding to the moving contact wiring hole and arranged at an interval is arranged in the moving contact shell, the moving contact wiring board is in a U shape, an opening of the U shape is transversely arranged to be in limit fit with the fixed boss in the moving contact shell, one side wall of the U shape is located above the U shape to seal the moving contact wiring hole and is used for being electrically connected with an external conductor, and the other side wall is located below the U shape to be connected with a wire.

Optionally, a moving contact mounting hole is radially formed in the rotating shaft, the moving contact penetrates through the moving contact mounting hole, one end provided with the moving contact extends out of the moving contact mounting hole, and the other end of the moving contact is mounted in the moving contact mounting hole through an elastic element.

Optionally, the moving contact housing includes a moving contact first housing and a moving contact second housing that are fastened to each other.

The utility model discloses a moving contact subassembly independently encapsulates the moving contact, and the one end that the moving contact was equipped with the moving contact is worn out from the swing hole of moving contact casing downside, and the top side of moving contact casing is basically sealed, for the circuit breaker polar structure of current moving contact, static contact and arc extinguishing system encapsulation together, has improved insulating nature, can satisfy the insulation requirement under the high voltage.

In addition, the rotating shaft connecting rods of the moving contact assemblies of the preferred embodiment are all positioned in the moving contact shell, the sealing performance is strong, the driving connecting rods extend out of the upper area and are completely isolated from the lower area where the moving contacts extend out, compared with the scheme that the driving connecting rods are arranged on the outer side of the moving contact shell, the sealing performance is greatly improved, and especially when multiple groups of moving contact assemblies are adjacent and assembled in a row, two moving contact assemblies can be sealed separately.

In addition, the moving contact assembly also comprises an insulating piece, wherein the insulating piece is arranged between the two driving sub-connecting rods of the driving connecting rods, seals the upper side area of the rotating shaft groove, and blocks the area corresponding to the moving contact mounting hole and the area for mounting the driving connecting rods; the moving contact terminal board is arranged in the closed contact terminal hole of the top wall of the moving contact shell in a closed mode, and the top side of the moving contact shell is basically closed.

Drawings

FIG. 1 is an overall block diagram of an embodiment of a movable contact assembly;

FIG. 2 is an exploded view of an embodiment of the movable contact assembly;

FIG. 3 is an internal block diagram of an embodiment of the movable contact assembly;

figure 4 is a cross-sectional view of an embodiment of the movable contact assembly.

Detailed Description

The following provides an example with reference to the accompanying drawings, further illustrating the specific implementation of the moving contact assembly of the present invention. The moving contact assembly of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1-4, the movable contact assembly 5 of this embodiment includes a movable contact housing 5-1, a movable contact 5-3 and a rotating shaft 5-6, the movable contact 5-3 is mounted on the rotating shaft 5-6, the rotating shaft 5-6 is rotatably mounted in the movable contact housing 5-1, one end of the movable contact 5-3 is provided with a movable contact 5-3-1, and one end of the movable contact 5-3, which is provided with the movable contact 5-3-1, protrudes through a swinging hole at the lower side of the movable contact housing 5-1.

The moving contact assembly 5 of the embodiment independently encapsulates the moving contact 5-3, one end of the moving contact 5-3, provided with the moving contact 5-3-1, penetrates out of the swinging hole on the lower side of the moving contact shell 5-1, and the top side of the moving contact shell 5-1 is basically sealed.

Preferably, the movable contact assembly 5 further comprises an arc striking plate 5-2, and the arc striking plate 5-2 is installed on the outer side of the lower side of the movable contact housing 5-1 and is located at the position where the movable contact is opened to the maximum.

Preferably, as shown in fig. 2, a rotating shaft groove is arranged in an upper region of the moving contact housing 5-1, a moving contact swing groove is arranged in a lower region of the moving contact housing 5-1, a swing hole is formed below the moving contact swing groove in an open manner, the rotating shaft 5-6 is installed in the rotating shaft groove, the arc striking plate 5-2 is fixedly arranged on one side wall of the moving contact swing groove corresponding to the position where the moving contact is opened to the maximum position during opening, an insulating convex rib is arranged between the rotating shaft groove and the swing groove for separation, the insulating convex rib is provided with a through hole for one end of the moving contact 5-3 to pass through, and the rotating shaft groove and the swing groove are separated by the insulating convex rib.

Preferably, when the rotating shaft 5-6 rotates to drive the moving contact 5-3 to swing, the radial side wall of the rotating shaft 5-6 can block the through hole, and/or the radial side wall of the rotating shaft 5-6 is correspondingly provided with a matched arc-shaped convex side edge to block the through hole as required, so that the upper area of the moving contact shell 5-1 is completely isolated from the moving contact 5-3, and the insulativity is greatly improved.

The moving contact 5-3 of the embodiment is a single-breakpoint moving contact, a moving contact mounting hole which penetrates through the moving contact is arranged in the radial direction of the rotating shaft 5-6, the moving contact 5-3 penetrates through the moving contact mounting hole, one end provided with the moving contact 5-3-1 extends out of the moving contact mounting hole, the other end is arranged in the moving contact mounting hole through an elastic element to realize overtravel, the axial rotation of the rotating shaft 5-6 is arranged in the moving contact shell 5-1, bearings can be selected and matched at the two axial ends of the rotating shaft 5-6, the movable contact is rotationally connected with a movable contact shell 5-1 through a bearing, a rotating center of a rotating shaft connecting rod 5-8 and a rotating center of a rotating shaft 5-6 are eccentrically arranged, one end of a driving connecting rod 5-5 is connected with the rotating shaft connecting rod 5-8, and the other end of the driving connecting rod extends out of the movable contact shell 5-1 and is used for being connected with an operating mechanism of a switching device. In this embodiment, a through connecting rod hole is axially formed in the rotating shaft 5-6, the connecting rod hole and a rotating center of the rotating shaft 5-6 are eccentrically arranged, the rotating shaft connecting rod 5-8 penetrates through the connecting rod hole, and two ends of the rotating shaft connecting rod are exposed outside the rotating shaft 5-6, although the rotating shaft connecting rod 5-8 and the rotating shaft 5-6 can also be integrally formed and formed by protrusions at two axial ends of the rotating shaft 5-6. The driving connecting rods 5-5 are Y-shaped or U-shaped and comprise two driving sub-connecting rods which are oppositely arranged, one ends of the two driving sub-connecting rods are respectively connected with two ends of the rotating shaft connecting rods 5-8, the other ends of the two driving sub-connecting rods are connected together in a bending mode and used for being connected with the operating mechanism, and a driving shaft of the operating mechanism can penetrate through the rotating shaft connecting rods 5-8 of the multiple breaker poles to drive the multiple rotating shaft connecting rods 5-8 simultaneously.

Preferably, as shown in fig. 1-4, in order to improve the sealing performance of the movable contact assembly 5, the driving link 5-5 and the rotating shaft link 5-8 of the present embodiment are both disposed in the movable contact housing 5-1, two ends of the rotating shaft link 5-8 do not protrude out of the movable contact housing 5-1, one end of the driving link 5-5 connected to the rotating shaft link 5-8 is located in the movable contact housing 5-1, and the other end of the driving link 5-5 protrudes out of the side wall of the top side or upper region of the movable contact housing 5-1 for connecting to the operating mechanism. The rotating shaft connecting rods 5-8 of the embodiment are all positioned in the moving contact shell 5-1, the sealing performance is strong, the driving connecting rods 5-5 extend out from the upper region and are completely isolated from the lower region where the moving contacts 5-3 extend out, compared with the scheme that the driving connecting rods 5-5 are arranged on the outer side of the moving contact shell 5-1, the sealing performance is greatly improved, and particularly when a plurality of groups of moving contact assemblies 5 are adjacent and are assembled in parallel, the two moving contact assemblies 5 can be respectively sealed. Of course, as a deterioration embodiment, it is also possible to arrange the driving link 5-5 outside the movable contact housing 5-1, with both ends of the rotating shaft link 5-8 extending outside the movable contact housing 5-1.

Preferably, the moving contact assembly 5 further comprises an insulating member 5-4, the insulating member 5-4 is arranged between two driving sub-connecting rods of the driving connecting rods 5-5, the upper side area of the rotating shaft groove is sealed, the area corresponding to the moving contact mounting hole and the area where the driving connecting rods 5-5 are mounted are sealed, the sealing performance is further improved, and the top side of the moving contact shell 5-1 is basically closed.

Preferably, the upper region of the movable contact shell 5-1 is also provided with a movable contact terminal board 5-7, and the movable contact 5-3 is connected with the movable contact terminal board 5-7 through a wire 5-3-2. The moving contact shell 5-1 comprises a moving contact shell top wall, a moving contact shell bottom wall, two moving contact shell side walls and two moving contact shell end walls, wherein the moving contact shell top wall and the moving contact shell bottom wall are opposite, the two moving contact shell side walls are opposite, the two moving contact shell end walls are opposite, a swinging hole is formed in the moving contact shell bottom wall, a moving contact wiring hole corresponding to a moving contact wiring board 5-7 is formed in the moving contact shell top wall, a moving contact 5-3 is connected with the moving contact wiring board 5-7 through a wire 5-3-2, and a driving connecting rod 5-5 extends out of the moving contact shell top wall or one moving contact shell end wall.

Preferably, the movable contact terminal board 5-7 closes the contact terminal hole, so as to further improve the sealing performance, and the top side of the movable contact shell 5-1 is basically closed. Specifically, a fixed boss corresponding to and arranged at an interval with a moving contact wiring hole is arranged in the moving contact shell 5-1, the moving contact wiring board 5-7 of the embodiment is in a U shape, an opening of the U shape is transversely arranged to be in limit fit with the fixed boss in the moving contact shell 5-1, one side wall of the U shape is positioned above the U shape to seal the moving contact wiring hole and is used for being electrically connected with an external conductor, and the other side wall of the U shape is positioned below the U shape to be connected with a wire 5-3-2.

Preferably, the moving contact housing 5-1 includes a first moving contact housing and a second moving contact housing that are fastened to each other, and the first moving contact housing and the second moving contact housing are spliced to form the rotating shaft slot, the moving contact swing slot, a wiring board slot for installing the moving contact wiring board 5-7, a screw slot for fixing the moving contact housing 5-1, and the like.

The moving contact component 5 of the embodiment realizes better sealing of the moving contact system during opening and closing, improves the insulativity, can meet the insulation requirement under high voltage, and can be used in low-voltage switch electrical appliances such as circuit breakers and the like.

It should be noted that, in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship that is usually placed when used, and are only for convenience of description, but do not indicate that the device or element that is referred to must have a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish one description from another, and are not to be construed as indicating relative importance.

The foregoing is a more detailed description of the present invention, taken in conjunction with specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments thereof. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims

1. A moving contact component is characterized in that: the moving contact component (5) comprises a moving contact shell (5-1), a moving contact (5-3) and a rotating shaft (5-6), the moving contact (5-3) is installed on the rotating shaft (5-6), the rotating shaft (5-6) is rotatably installed in the moving contact shell (5-1), one end of the moving contact (5-3) is provided with the moving contact (5-3-1), and one end of the moving contact (5-3) provided with the moving contact (5-3-1) penetrates out of a swinging hole in the lower side of the moving contact shell (5-1).

2. A movable contact assembly as claimed in claim 1, wherein: a rotating shaft groove is formed in the upper portion area of the moving contact shell (5-1), a moving contact swinging groove is formed in the lower portion area of the moving contact shell (5-1), a swinging hole is formed in the lower portion of the moving contact swinging groove in an open mode, the rotating shaft (5-6) is installed in the rotating shaft groove, an insulating convex rib is arranged between the rotating shaft groove and the swinging groove for separation, and a through hole for enabling one end of the moving contact (5-3) to penetrate through is formed in the insulating convex rib.

3. A movable contact assembly as claimed in claim 2, wherein: the moving contact component (5) further comprises an arc striking plate (5-2), and the arc striking plate (5-2) is fixedly arranged on one side wall of the moving contact swinging groove corresponding to the position where the moving contact is opened to the maximum position during opening.

4. A movable contact assembly as claimed in claim 2, wherein: when the rotating shaft (5-6) rotates to drive the moving contact (5-3) to swing, the radial side wall of the rotating shaft (5-6) and/or the arc-shaped convex side edge on the radial side wall plugs the through hole.

5. A movable contact assembly as claimed in claim 1, wherein: the moving contact assembly (5) further comprises a rotating shaft connecting rod (5-8) and a driving connecting rod (5-5), the rotating shaft connecting rod (5-8) and the rotating center of the rotating shaft (5-6) are eccentrically arranged, and one end of the driving connecting rod (5-5) is connected with the rotating shaft connecting rod (5-8).

6. The movable contact assembly of claim 5 wherein: the rotating shaft connecting rod (5-8) is positioned in the moving contact shell (5-1), one end of the driving connecting rod (5-5) connected with the rotating shaft connecting rod (5-8) is positioned in the moving contact shell (5-1), and the side wall of the top side or the upper part area of the other end extends out of the moving contact shell (5-1).

7. The movable contact assembly of claim 6 wherein: the driving connecting rod (5-5) comprises two driving sub-connecting rods which are arranged oppositely, one ends of the two driving sub-connecting rods are respectively connected with two ends of a rotating shaft connecting rod (5-8), the other ends of the two driving sub-connecting rods are connected together in a bending mode and extend out of the moving contact shell (5-1), the moving contact component (5) further comprises an insulating piece (5-4), and the insulating piece (5-4) is arranged between the two driving sub-connecting rods of the driving connecting rods (5-5).

8. The movable contact assembly of claim 1 wherein: the moving contact shell (5-1) comprises a moving contact shell top wall, a moving contact shell bottom wall, two moving contact shell side walls and two moving contact shell end walls, wherein the moving contact shell top wall and the moving contact shell bottom wall are opposite, the two moving contact shell side walls are opposite, the two moving contact shell end walls are opposite, a swinging hole is formed in the moving contact shell bottom wall, a moving contact wiring hole corresponding to a moving contact wiring board (5-7) is formed in the moving contact shell top wall, and a moving contact (5-3) is connected with the moving contact wiring board (5-7) through a wire (5-3-2).

9. The movable contact assembly of claim 8 wherein: the moving contact terminal board (5-7) seals the contact terminal hole.

10. The movable contact assembly of claim 8 wherein: the moving contact terminal is characterized in that fixed bosses which correspond to the moving contact terminal holes and are arranged at intervals are arranged in the moving contact shell (5-1), the moving contact terminal plate (5-7) is U-shaped, an opening of the U-shaped is transversely arranged to be in limit fit with the fixed bosses in the moving contact shell (5-1), one side wall of the U-shaped is located above and seals the moving contact terminal holes and is used for being electrically connected with an external conductor, and the other side wall of the U-shaped is located below and is connected with a wire (5-3-2).

11. A movable contact assembly as claimed in claim 1, wherein: a moving contact mounting hole is arranged in the radial direction of the rotating shaft (5-6) in a penetrating way, the moving contact (5-3) penetrates through the moving contact mounting hole, one end provided with the moving contact (5-3-1) extends out of the moving contact mounting hole, and the other end is mounted in the moving contact mounting hole through an elastic element.

12. A movable contact assembly as claimed in any one of claims 1 to 11 wherein: the moving contact shell (5-1) comprises a moving contact first shell and a moving contact second shell which are buckled with each other.