CN220381935U - Moving contact assembly - Google Patents

Abstract

The utility model relates to the field of low-voltage appliances, in particular to a moving contact assembly, an annular groove of the moving contact assembly is arranged around a bearing column in the middle of a contact support, a moving contact is inserted in the bearing column, two ends of the moving contact are respectively provided with two moving contact parts which are at least partially positioned in the annular groove, the two moving contact parts protrude out of two radial sides of the bearing column and divide the annular groove into two groups of semi-annular grooves, the two semi-annular grooves are used for respectively inserting two groups of fixed contacts to be closed and opened with corresponding moving contact parts, one end of each semi-annular groove is provided with a fixed contact position, and the fixed contact position is used for accommodating corresponding fixed contacts when the moving contact assembly rotates to an opening position; the contact support further comprises a space occupying boss protruding along the axial direction of the movable contact assembly, wherein the space occupying boss is arranged on at least one of two opposite inner side surfaces of each group of semi-annular grooves, and at least part of the space occupying boss is positioned between the corresponding movable contact part and the fixed contact position; the moving contact assembly can accelerate the electric arc to move out from between the moving contact and the fixed contact.

Description

Moving contact assembly

Technical Field

The utility model relates to the field of piezoelectric devices, in particular to a moving contact assembly.

Background

The existing rotary isolating switch is characterized in that a switch body is formed by stacking and splicing a plurality of switch units, each switch unit is internally provided with a contact mechanism, each contact mechanism comprises a moving contact assembly and two fixed contacts which are matched for use, and the moving contact assembly rotates to be closed and opened with the two fixed contacts; and the electric arc generated when the movable contact assembly and the fixed contact are disconnected can not be transferred in time, so that the movable contact and the fixed contact of the movable contact assembly are easily ablated by the electric arc, and the switch performance and the service life are affected. In addition, the contact support of the existing moving contact assembly is formed by relatively splicing two parts along the rotating axial direction of the moving contact assembly, and transmission connection structures are arranged at two ends of the contact support.

Disclosure of Invention

The utility model aims to overcome at least one defect in the prior art and provides a moving contact assembly which can accelerate the moving out of an arc between a moving contact and a fixed contact.

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

the movable contact assembly comprises a contact support and a movable contact, wherein the contact support comprises a bearing column arranged in the axial middle of the contact support and an annular groove surrounding the bearing column, the movable contact is inserted into the bearing column, two ends of the movable contact are respectively provided with two movable contact parts which are at least partially positioned in the annular groove, the two movable contact parts are protruded on two radial sides of the bearing column and divide the annular groove into two groups of semi-annular grooves, the two semi-annular grooves are used for respectively inserting two groups of fixed contacts to be closed and opened with the corresponding movable contact parts, one end of each semi-annular groove is provided with a fixed contact position for accommodating the corresponding fixed contact when the movable contact assembly rotates to an opening position;

the contact support further comprises a space occupying boss protruding along the axial direction of the movable contact assembly, wherein the space occupying boss is arranged on at least one of two opposite inner side surfaces of each group of semi-annular grooves, and at least part of the space occupying boss is positioned between the corresponding movable contact part and the fixed contact position.

Further, the two ends of the occupying boss extend to the two ends of the inner face of the semi-annular groove where the occupying boss is located respectively in the circumferential direction of the bearing column.

Further, one end of the occupying boss is adjacent to the bearing column in the radial direction of the bearing column, and the other end of the occupying boss extends to the outer edge of the corresponding semi-annular groove.

Further, the width of the occupying boss in the radial direction of the bearing column is the same as the width of the inner side surface of the semi-annular groove where the occupying boss is located.

Further, the occupying boss is provided with a plurality of grooves, and the grooves are arranged side by side at intervals along the circumferential direction of the bearing column.

Further, the two inner side surfaces of each group of semi-annular grooves are respectively provided with a space occupying boss, and the two groups of space occupying bosses are relatively protruded.

Further, the contact support further comprises an upper side plate and a lower side plate, wherein the upper side plate and the lower side plate are arranged on two axial sides of the bearing column, and the annular groove is formed between the upper side plate and the lower side plate; the lower side plate is provided with two groups of avoidance notches which are respectively communicated with the two groups of semi-annular grooves, and the avoidance notches are used for allowing corresponding static contacts to pass through and enter the corresponding semi-annular grooves.

Further, the two avoidance notches are communicated with the two groups of static contact positions relatively.

Further, the contact support comprises a relatively spliced support cover and a support seat, wherein the support cover comprises an upper side plate, and the support seat comprises a bearing column and a lower side plate; the contact support also comprises a plug part and a jack part which are respectively arranged at the two axial ends of the contact support, wherein the plug part comprises a main plug and an auxiliary plug, the main plug is arranged on one side of the upper side plate, which is far away from the support seat, the auxiliary plug is arranged on one end of the bearing cylindrical surface, which faces the support cover, and the auxiliary plug passes through a support cover hole of the support cover and is parallel to the main plug; the jack part is arranged on the supporting seat and is matched with the plug part.

Further, the rotation axis supported by the contact passes through the middle part of the main plug, the main plug and the auxiliary plugs are arranged at intervals, and two groups of auxiliary plugs (1-22) are respectively arranged at two sides of the main plug; the jack part comprises a main jack and an auxiliary jack, wherein the main jack is matched with the main plug, and the auxiliary jack is matched with the auxiliary plug.

According to the moving contact assembly, the space occupying boss can reduce the width of the corresponding semi-annular groove (namely the distance between the two side walls of the semi-arc groove) in the axial direction of the moving contact assembly, so that when the fixed contact and the corresponding moving contact part are disconnected, the arc can be easily removed from the annular groove as soon as possible due to the larger size difference between the outer space of the moving contact assembly and the annular groove, the ablation of the arc on the moving contact and the fixed contact is reduced, and the service life of the contact mechanism is prolonged.

In addition, dodging the breach and being used for supplying corresponding stationary contact to pass through and get into corresponding semi-annular groove to simplify the equipment operation, improve assembly efficiency.

In addition, the plug part of the movable contact assembly is formed by combining a main plug arranged on the supporting cover and an auxiliary plug arranged on the supporting seat, so that the structural strength of the plug part is improved, the reliability of the plug part connected with an external structure in a plugging manner is ensured, the action synchronicity of the supporting cover and the supporting seat in the contact supporting rotation process is ensured, and the rotation synchronicity of each movable contact assembly is ensured when the movable contact assembly is used for supporting and plugging connection of adjacent contacts. The plug part is arranged at one end of the support, the jack part is arranged at the other end of the support, the plug part and the jack part are matched, when the rotary contact assemblies are arranged in parallel in a linkage way, the connection structure and operation of the rotary contact assemblies are simplified, and the connection strength and the action consistency of the supports are ensured; and the auxiliary plug and the jack part of the plug part are arranged on the supporting seat, so that the action consistency of the supporting of each contact is further improved when the plurality of contacts are in linkage arrangement.

Drawings

FIG. 1 is a schematic diagram of the structure of a switch unit of the present utility model;

FIG. 2 is a projection view of the switch unit of the present utility model;

fig. 3 is a schematic view of the structure of a contact system according to a first embodiment of the present utility model;

FIG. 4 is a perspective view of the contact system of the first embodiment of the present utility model with the movable contact assembly removed;

fig. 5 is a schematic view of the structure of a contact system according to a second embodiment of the present utility model;

FIG. 6 is a perspective view of a contact system of a second embodiment of the present utility model with the movable contact assembly removed

Fig. 7 is a schematic view of the structure of a contact system according to a third embodiment of the present utility model;

FIG. 8 is a perspective view of a contact system of a third embodiment of the present utility model with the movable contact assembly removed;

fig. 9 is an exploded view of the moving contact assembly of the present utility model;

FIG. 10 is a schematic view of the structure of the support cover of the present utility model in one view;

FIG. 11 is a schematic view of the structure of the support cover of the present utility model in another view;

FIG. 12 is a schematic view of the structure of the support base of the present utility model in one view;

FIG. 13 is a schematic view of the structure of the support base of the present utility model at another view angle;

fig. 14 is a schematic structural view of the unit case of the present utility model.

Description of the reference numerals

A 0 switch body;

a u switch unit;

c a contact mechanism;

1, a movable contact assembly; 1s contact support; 1-1 supporting a cover; 1-10 upper side plates; 1-11 main plugs; 1-12 support cap holes; 1-13 clamping feet; 1-14 upper occupying bosses; 1-2 supporting seats; 1-21 moving contact mounting grooves; 1-22 auxiliary plugs; 1-23 clamping holes; 1-24 lower occupying bosses; 1-25 pairs of jacks; 1-26 main jacks; 1-201 a load-bearing column; 1-200 lower side plates; 1-201 a load-bearing column; 1-3 moving contacts; 1-30 movable contact parts;

2, a static contact; 2-1 right contacts; 2-10 first static contact parts; 2-11 first connection portions; 2-12 first wiring parts; 2-2 left contacts; 2-20 second static contact parts; 2-21 second connection portions; 2-22 second wiring parts;

3 a unit housing; 3b a bottom wall of the shell; 3f front side wall; 3i rear side wall; 3l left side wall; 3r right side wall; 3-1 supporting shaft holes; 3-2 a first exhaust port; 3-3 a second exhaust port; 3-4 partition plates; 3-40 separator plate bodies; 3-41 divider plate extensions; 3-5 limiting ribs; 3-6 right static contact wiring positions; 3-7 separating ribs; 3-8 left static contact wiring positions; 3-90 straight airway segments; 3-91C-shaped airway segment; 3-92 airway ribs; 3-920 of a first section of the rib; 3-921 to block the second section of the rib.

Detailed Description

Embodiments of the rotary isolation switch of the present utility model are further described below with reference to the examples shown in the drawings. The rotary disconnecting switch of the present utility model is not limited to the description of the following embodiments.

As shown in fig. 1, 2 and 9, the rotary isolating switch of the present utility model includes an operating mechanism (not shown in the drawings) and a switch body 0, the switch body 0 includes at least one group of switch units u, each switch unit u includes a unit housing 3 and a contact mechanism c disposed in the unit housing 3, the contact mechanisms c of each switch unit u together form a contact system of the switch body 0, the contact mechanism c includes a moving contact assembly 1 rotatably disposed and two groups of fixed contacts 2 disposed at two radial sides of the moving contact assembly 1, the moving contact assembly 1 is rotatably disposed around a first axis and includes a contact support and a moving contact 1-3, the moving contacts 1-3 are disposed on the contact support (preferably inserted in the contact support) and include two groups of moving contact portions 1-30 disposed at both ends thereof, the two groups of fixed contacts 2 are respectively a right fixed contact 2-1 and a left fixed contact 2-2, the two groups of moving contact portions 1-30 are respectively engaged with the two groups of fixed contacts 2, two groups of contact pairs (namely, the right fixed contact 2-1 and one group of fixed contacts 1-30 are a pair of moving contact contacts, and the moving contact assemblies 2-30 are respectively connected with the other group 1-30 and the driving mechanism is in a corresponding manner, and the moving contact assemblies are in turn-1 and are in contact assemblies and are in contact 1 and respectively connected with the driving units. Further, the switch unit further comprises an arc extinguishing system, wherein the arc extinguishing system comprises two groups of arc extinguishing devices which are respectively arranged at two radial sides of the moving contact assembly 1, and the arc extinguishing devices are respectively matched with the two groups of contact pairs and are used for extinguishing arcs generated when the two groups of contact pairs are closed and disconnected. Further, the operating mechanism is realized by the prior art and will not be described here.

Specifically, as shown in fig. 2, the switch body includes two or more groups of switch units u, each of which is stacked along a first axis; the operating mechanism and the switch body are stacked together along a first axis.

As shown in fig. 1-8, the fixed contact 2 includes a fixed contact portion for contacting and conducting with the moving contact assembly 1 and a wiring portion for electrically connecting with an external circuit, and the fixed contact portions of the two fixed contacts 2 are respectively used for contacting and conducting with the two sets of moving contact portions 1-30 of the moving contacts 1-3.

As shown in fig. 1-8, the projection of the contact system perpendicular to the first axis is a first projection, and in two adjacent contact mechanisms c, two right fixed contacts 2-1 are a group of contact pairs, and two left fixed contacts 2-2 are a group of contact pairs. In the contact pair, on the first projection, the static contact portions are overlapped with each other, that is, the static contact portions of the two groups of right static contacts 2-1 are overlapped with each other, and the static contact portions of the two groups of left static contacts 2-2 are overlapped with each other. The above layout manner of the static contact part of the static contact 2 enables each moving contact assembly 3 to keep synchronous action and gesture to be closed and opened with the corresponding static contact 2, and is beneficial to simplifying the internal structure of the switch unit u when the static contact assembly is applied to the switch unit u of the rotary isolating switch, and the moving contact assembly 1 of each switch unit u does not need to be distinguished, so that the universality of parts is improved. In the two adjacent contact mechanisms c, on the first projection, the two fixed contacts of at least one contact pair are overlapped with each other, that is, the two left fixed contacts 2-2 are overlapped and/or the two right fixed contacts 2-1 are overlapped, which is beneficial to simplifying the wiring operation of the contact system and enabling the wiring of the external connection wire to be tidier and simpler. Further, the movable contact assemblies 1 of two adjacent groups of contact mechanisms c are overlapped with each other in the projection perpendicular to the first axis of the contact system.

Specifically, as shown in fig. 3, 5, and 7, in the two adjacent groups of contact mechanisms c, the moving contact assembly 1, the left fixed contact 2-2, and the right fixed contact 2-1 of the contact mechanism c located above are respectively an upper moving contact assembly 1a, an upper left fixed contact 2-2a, and an upper right fixed contact 2-1a, and the moving contact assembly 1, the left fixed contact 2-2, and the right fixed contact 2-1 of the contact mechanism c located below are respectively a lower moving contact assembly 1b, a lower left fixed contact 2-2b, and a lower right fixed contact 2-1b; as shown in fig. 4, 6 and 8, on the first projection, the upper moving contact assembly 1a and the lower moving contact assembly 1b are overlapped, the static contact portions of the upper left static contact 2-2a and the lower left static contact 2-2b are overlapped, and the static contact portions of the upper right static contact 2-1a and the lower right static contact 2-1b are overlapped.

As shown in fig. 1-8, the static contact part is preferably a contact knife structure and is a static contact knife; the movable contact parts 1-30 comprise two movable contact plates which are oppositely arranged, and a clamping opening is formed between the two movable contact plates; when the static contact part and the movable contact parts 1-30 are closed, the static contact part is clamped in the clamping opening, namely, the static contact part is inserted between and contacted with the two movable contact plates of the movable contact parts 1-30, and the static contact part is clamped by the two movable contact plates. Furthermore, the static contact part and the dynamic contact parts 1-30 can be arranged in a manner that a plurality of contact knives which are arranged in parallel are in plug-in fit with a plurality of clamping ports which are arranged side by side.

As other examples, the static and dynamic contact portions 1-30 do not exclude other implementations in the prior art.

As shown in fig. 1-8, the static contact 2 further includes a connection portion, and the static contact portion, the connection portion and the connection portion are sequentially connected. Further, the fixed contact 2 is in an integral structure or a split structure, and in this embodiment, the fixed contact 2 is preferably in an integral structure.

As shown in fig. 1-4, for the first embodiment of the contact system, the rotary isolating switch of this embodiment preferably employs the contact system of the first embodiment.

As shown in fig. 2 and 4, in the projection perpendicular to the first axis of the contact system of this embodiment, in the adjacent two groups of contact mechanisms c, the two groups of right fixed contacts 2-1 are overlapped, the fixed contact portions of the two groups of left fixed contacts 2-2 are overlapped, and the wiring portions of the two groups of left fixed contacts 2-2 are arranged at opposite intervals, that is, in a triangle, the fixed contact portions of the two groups of left fixed contacts 2-2 are located at one vertex, and the wiring portions of the two groups of left fixed contacts 2-2 are respectively located at the other two vertices, so as to increase the creepage distance and the insulation gap between the two groups of left fixed contacts 2-2. Further, the triangle is an obtuse triangle, the static contact portions of the two groups of left static contacts 2-2 are positioned at the vertexes corresponding to the obtuse angles of the triangle, and the wiring portions of the two groups of left static contacts 2-2 are positioned at the vertexes corresponding to the two acute angles of the triangle. Further, the triangle is an obtuse isosceles triangle.

As shown in fig. 3-4, the static contact portion, the connection portion and the connection portion of the right static contact 2-1 are respectively a first static contact portion 2-10, a first connection portion 2-11 and a first connection portion 2-12, which are all in plate-shaped structures, the first static contact portion 2-10 and the first connection portion 2-11 are coplanar, and the first connection portion 2-12 is bent and connected with the first connection portion 2-11, and is preferably vertically connected. Further, the contact mechanism c further comprises a fastener, and the fastener is matched with the first wiring part 2-12 to connect the first wiring part 2-12 with an external lead. The fastener preferably comprises a first binding screw and a first tile, wherein the first binding screw is in threaded connection with the first binding portion 2-12, and the first tile is sleeved on the first binding screw and opposite to the first binding portion 2-12 and is used for compressing an external lead electrically connected with the first binding portion 2-12.

As shown in fig. 3-4, the static contact portion, the connection portion and the connection portion of the left static contact 2-2 are respectively a second static contact portion 2-20, a second connection portion 2-21 and a second connection portion 2-22, which are all plate-shaped structures and preferably coplanar. Further, the second connecting portion 2-21 includes a second connecting portion inner section and a second connecting portion outer section, one end of the second connecting portion inner section is connected with the second static contact portion 2-20, the other end is bent and connected (preferably connected at right angles) with one end of the second connecting portion outer section, the other end of the second connecting portion outer section is bent and connected (preferably connected at right angles) with the second connecting portion 2-22, and the second connecting portion inner section and the second connecting portion 2-22 are respectively bent towards two sides of the second connecting portion outer section; in the two adjacent groups of contact mechanisms c, on the first projection, the inner sections of the two second connecting parts are at least partially overlapped, and the outer sections of the two second connecting parts are bent towards the two sides of the inner sections of the two second connecting parts. Specifically, the right stationary contact 2-2 is integrally in a zigzag structure, and the free end of the second wire connection part 2-22 protrudes outside the unit housing 3 and is preferably perpendicular to the side wall of the unit housing 3, in this embodiment, the second wire connection part 2-22 protrudes outside the left side wall 3l of the unit housing 3 and is perpendicular to the left side wall 3l, and is used for welding with a circuit board; in the direction shown in fig. 4, the outer sections of the two groups of second connecting portions are respectively bent to the upper and lower sides of the inner sections of the two second connecting portions.

As shown in fig. 4, in the projection perpendicular to the first axis of the contact system, in two adjacent groups of contact mechanisms c, two groups of left fixed contacts 2-2 are integrally in a half-large-opening bracket structure.

As shown in fig. 9-13, the moving contact assembly 1 comprises a contact support 1s and a moving contact 1-3, the contact support 1s comprises a bearing column 1-201 arranged at the axial middle part of the contact support 1s and annular grooves surrounding the bearing column 1-201, namely, the outer diameter of the middle part of the contact support 1s is smaller than the outer diameters of two ends of the contact support 1s, annular grooves positioned at the axial middle part of the contact support 1s are formed, the middle part of the contact support 1s is arranged as the bearing column 1-201, the annular grooves are circumferentially surrounding the bearing column 1-201, the moving contact 1-3 is inserted in the bearing column 1-201, two moving contact parts 1-30 at least partially positioned in the annular grooves are respectively arranged at two ends of the moving contact 1-3, namely, two moving contact parts 1-30 are respectively arranged at two ends of the moving contact 1-3, each movable contact part 1-30 is at least partially positioned in the annular groove, the two movable contact parts 1-30 respectively protrude at the two radial sides of the bearing column 1-201 and divide the annular groove into two semi-annular grooves (preferably two basically symmetrical arc grooves), the two semi-annular grooves are used for respectively inserting two groups of fixed contacts 2 to be closed and opened with the corresponding movable contact parts 1-30, one end of each semi-annular groove is provided with a fixed contact position for accommodating the corresponding fixed contact 2 when the movable contact assembly 1 rotates to the opening position, namely, each semi-annular groove is provided with a fixed contact position, the two fixed contact positions are respectively a left fixed contact position and a right fixed contact position, when the movable contact assembly 1 rotates to the opening position, the left fixed contact 2-2 and the right fixed contact 2-1 are kept stationary, the left static contact position rotates relative to the left static contact 2-2 to enable the left static contact 2-2 to enter the left static contact position, and the right static contact position rotates relative to the right static contact 2-1 to enable the right static contact 2-1 to enter the right static contact position. The contact support 1s further comprises a space occupying boss protruding along the axial direction of the movable contact assembly 1, wherein the space occupying boss is arranged on at least one of two opposite inner side surfaces of each group of semi-annular grooves, and at least part of the space occupying boss is positioned between the corresponding movable contact part 1-30 and the fixed contact position. The space occupying boss can reduce the width of the corresponding semi-annular groove (namely the distance between the two side walls of the semi-annular groove) to form a narrow slit, so that when the fixed contact 2 and the corresponding movable contact part 1-30 are disconnected, the arc can be easily removed from the annular groove as soon as possible due to the larger size difference between the outer space of the movable contact assembly 1 and the annular groove, the ablation of the arc to the movable contact 1-3 and the fixed contact 2 is reduced, and the service life of the contact mechanism c is prolonged.

Specifically, as shown in fig. 3, 5, 7 and 9, the two inner sides of the semi-annular groove are arranged vertically opposite to each other, the space occupying boss arranged on the inner side above is protruded downwards, and the space occupying boss arranged on the inner side below is protruded upwards.

As shown in fig. 11 and 12, the two ends of the occupying boss extend to two ends of the inner side surface of the semi-annular groove where the occupying boss is located respectively in the circumferential direction of the bearing column 1-201 (namely, the rotating direction of the moving contact assembly 1), and the fixed contact 2 is always opposite to the occupying boss in the disconnection process of the corresponding moving contact part 1-30, so that the electric arc is always in a narrow space, and the electric arc is accelerated to move out of the annular groove.

As shown in fig. 11 and 12, the space occupying boss has one end abutting the carrying column 1-201 and the other end extending to the outer edge of the corresponding semi-annular groove in the radial direction of the carrying column 1-201. Further, the width of the occupying boss is the same as the width of the inner side surface of the semi-annular groove where the occupying boss is positioned in the radial direction of the bearing column 1-201, so that the fixed contact 2 is always opposite to the occupying boss in the disconnection process of the corresponding movable contact part 1-30, and the electric arc is always in a narrow space, thereby accelerating the electric arc to move out of the annular groove.

As shown in fig. 3, 5, 7, 9 and 11-12, the two inner sides of each group of semi-annular grooves are respectively provided with a space occupying boss, and the two groups of space occupying bosses are oppositely protruded.

As shown in fig. 11 and 12, the space-occupying boss is provided with a plurality of grooves, each groove is arranged at intervals side by side along the circumferential direction of the bearing column 1-201, and the grooves are beneficial to ensuring uniform wall thickness so as to prevent deformation of the contact support during demolding for 1 s. The cross section of the space-occupying boss, that is, the cross section of the space-occupying boss perpendicular to the first axis, is preferably a sector-shaped structure.

As other embodiments, the space-occupying boss includes a plurality of sub-bosses, each sub-boss being arranged at intervals side by side along the circumferential direction of the carrying column 1-201. Further, the sub-bosses on the two inner sides of the semi-annular groove are staggered, that is, the sub-boss on one inner side is opposite to the gap between the two sub-bosses on the other inner side.

Specifically, as shown in fig. 9, 11 and 12, two inner sides of each group of semi-annular grooves are respectively provided with an occupied boss, namely an upper occupied boss 1-14 and a lower occupied boss 1-24, and the two groups of occupied bosses are relatively protruded. As shown in fig. 11-12, the two inner sides of the semi-annular groove are fully occupied by the corresponding occupying bosses respectively.

As shown in fig. 3, 5, 7, 9-13, the contact support 1s further comprises an upper side plate 1-10 and a lower side plate 1-200, the upper side plate 1-10 and the lower side plate 1-200 are respectively arranged at two axial sides of the bearing column 1-201, an annular groove surrounding the bearing column 1-201 is formed between the upper side plate 1-10 and the lower side plate 1-200, that is, a pair of side walls of the annular groove are formed by the upper side plate 1-10 and the lower side plate 1-200 which are opposite, and the circumferential side wall of the bearing column 1-201 forms the bottom wall of the annular groove.

Specifically, as shown in fig. 3, 5, 7 and 9, the upper side plate 1-10 and the lower side plate 1-200 are arranged vertically opposite to each other, the bearing column 1-201 is arranged between the upper side plate 1-10 and the lower side plate 1-200, and the upper and lower ends of the bearing column are respectively matched (connected or abutted) with the upper side plate 1-10 and the lower side plate 1-200, the space occupying boss arranged on the inner side surface of the upper side plate 1-10 is downward protruded, and the boss arranged on the inner side surface of the lower side plate 1-20 is upward protruded.

As shown in fig. 9 and 12-13, the lower side plate 1-200 is provided with two groups of avoidance notches respectively communicated with the two groups of semi-annular grooves, and the avoidance notches are used for allowing the corresponding static contact 2 to pass through and enter the corresponding semi-annular grooves, so that the assembly operation is simplified, and the assembly efficiency is improved. Further, the two avoidance notches are respectively communicated with the two static contact positions relatively. Specifically, as shown in fig. 1-3, 5 and 7, during assembly, the fixed contact 2 is preloaded in the unit housing 3, the moving contact assembly 1 is moved from above and down into the supporting shaft hole 3-1 of the unit housing 3, and the fixed contact 2 can be installed into the annular groove of the moving contact assembly 1 without moving the fixed contact 2 due to the existence of the avoidance gap.

As shown in fig. 9-13, the contact support 1s includes a support cover 1-1 and a support seat 1-2 which are relatively spliced, the support cover 1-1 includes an upper side plate 1-10, and the support seat 1-2 includes a bearing column 1-201 and a lower side plate 1-200, which are preferably in an integral structure; the contact support 1s further comprises a plug part and a jack part which are respectively arranged at two axial ends of the contact support 1s, the plug part comprises a main plug 1-11 and an auxiliary plug 1-22, the main plug 1-11 is arranged on one side (particularly, one side, facing the support seat 1-2, of the upper side plate 1-10) of the support cover 1-1, which faces away from the support seat 1-2, the auxiliary plug 1-22 is arranged on one side (particularly, one end, facing the support cover 1-1, of the bearing column 1-201) of the support seat 1-2, and the auxiliary plug 1-22 penetrates through a support cover hole 1-12 of the support cover 1-1 to be parallel to the main plug 1-11; the contact support 1s further comprises a jack part arranged on the other axial end of the contact support 1s, and the jack part is arranged on the support seat 1-2 and is matched with the plug part. The plug part of the moving contact assembly 1 is formed by combining a main plug 1-11 arranged on a supporting cover 1-1 and an auxiliary plug 1-22 arranged on a supporting seat 1-2, so that the structural strength of the plug part is improved, the reliability of the plug part connected with an external structure in a plugging manner is ensured, the action synchronism of the supporting cover 1-1 and the supporting seat 1-2 in the rotating process of the contact supporting 1s is ensured, and the rotating synchronism of each moving contact assembly 1 is ensured when the adjacent contact supporting 1s is used for supporting the plug connection. The plug part is arranged at one end of the support, the jack part is arranged at the other end of the support, the plug part and the jack part are matched, when the rotary contact assemblies are arranged in parallel in a linkage way, the connection structure and operation of the rotary contact assemblies are simplified, and the connection strength and the action consistency of the supports are ensured; in addition, the auxiliary plug and the jack part of the plug part are arranged on the supporting seat 1-2, when a plurality of contact supports 1s are arranged in a linkage way, the jack part of one contact support 1s is in plug-in fit with the plug part of the other contact support 1s in two adjacent contact supports 1s, and the action consistency of each contact support 1s is further improved. Further, the rotation axis of the contact support 1s, that is, the first axis, passes through the middle of the main plug 1-11, the main plug 1-11 and the auxiliary plug 1-22 are arranged at intervals, and the two groups of auxiliary plugs 1-22 are respectively arranged at two sides of the main plug 1-11. Further, the two groups of auxiliary plugs 1-22 are symmetrically arranged on two sides of the main plug 1-11. Further, the jack part comprises a main jack 1-26 and an auxiliary jack 1-25, the main jack 1-26 is matched with the main plug 1-11, and the auxiliary jack 1-25 is matched with the auxiliary plug 1-22.

As shown in fig. 9 and 12, a moving contact mounting groove 1-21 is formed in the middle of the bearing column 1-201, the moving contact 1-3 is inserted into the moving contact mounting groove 1-21, and the upper side plate 1-10 compresses and limits the moving contact 1-3 in the moving contact mounting groove 1-21.

As shown in fig. 9-13, the contact support 1s further comprises a snap-in structure by which the support cover 1-1 and the support base 1-2 are connected. The supporting seat and the supporting cover are connected through the buckle structure, so that the assembly operation between the supporting seat and the supporting cover is simplified, and the assembly efficiency is improved. Further, the fastening structure comprises a fastening pin 1-13 and a fastening hole 1-23 which are matched for use, one fastening pin is arranged on the support cover 1-1, and the other fastening pin is arranged on the support seat 1-2. Further, the supporting cover 1-1 and the supporting seat 1-2 are connected through four groups of fastening structures, and the four groups of fastening structures are distributed at four vertexes of a quadrangle.

As shown in fig. 5-6, is a second embodiment of the contact system.

On the projection perpendicular to the first axis of the contact system of this embodiment, the right stationary contact 2-1 of each contact mechanism c coincides, and the left stationary contact 2-2 of each contact mechanism c coincides.

As shown in fig. 5-6, in the contact mechanism c, the right fixed contact 2-1 and the left fixed contact 2-2 are symmetrical with each other by taking the first axis as a symmetrical center, which is beneficial to further reducing the types of parts of the contact system and improving the production and assembly efficiency.

As shown in fig. 5-6, in the contact system of the present embodiment, the structures of the right stationary contact 2-1 and the left stationary contact 2-2 are preferably the same as those of the right stationary contact 2-1 of the first embodiment.

As shown in fig. 7-8, is a third embodiment of the contact system.

As shown in fig. 7-8, in the projection perpendicular to the first axis of the contact system of the present embodiment, the right stationary contact 2-1 of each contact mechanism c coincides, and the left stationary contact 2-2 of each contact mechanism c coincides.

As shown in fig. 7-8, in the contact mechanism c, the right stationary contact 2-1 has the same structure as the right stationary contact 2-1 of the contact system of the first embodiment.

As shown in fig. 7-8, the static contact portion, the connection portion and the connection portion of the left static contact 2-2 are respectively a second static contact portion 2-20, a second connection portion 2-21 and a second connection portion 2-22, and the second static contact portion 2-20, the second connection portion 2-21 and the second connection portion 2-22 are all plate-shaped structures and coplanar. Further, the second connection part 2-21 and the second connection part 2-22 are of a straight plate-shaped integrated structure, and the free end of the second connection part 2-22 preferably protrudes outside the unit housing 3 for soldering with a circuit board.

As shown in fig. 1, 2 and 14, the unit housing 3 is applied to the switching unit u, that is, a housing serving as the switching unit u, as an embodiment of the unit housing 3.

As shown in fig. 1, 2, 14, the unit housing 3 includes a case bottom wall 3b, oppositely disposed left and right side walls 3l, 3r, and oppositely disposed front and rear side walls 3f, 3i; the shell bottom wall 3b is provided with two opposite ends which are respectively connected with the left side wall 3l and the right side wall 3r in a bending way, and the other opposite ends are respectively connected with the front side wall 3f and the rear side wall 3i in a bending way, and the left side wall 3l, the rear side wall 3i, the right side wall 3r and the rear side wall 3f are sequentially connected end to end; a supporting shaft hole 3-1 is arranged in the middle of the bottom wall 3b of the shell and is used for installing the moving contact assembly 1, for example, the contact support 1s of the moving contact assembly 1 is rotatably installed in the supporting shaft hole 3-1; the unit housing 3 comprises two arc extinguishing chambers respectively arranged at two radial sides of the supporting shaft hole 3-1, namely a front arc extinguishing chamber and a rear arc extinguishing chamber, which are respectively used for installing two groups of arc extinguishing devices (the two groups of arc extinguishing devices are respectively matched with the two groups of contact pairs and are used for arc generated by closing and breaking of the inclined surface contact pairs), the front arc extinguishing chamber is positioned between the front side wall 3f and the supporting shaft hole 3-1, and the rear arc extinguishing chamber is positioned between the rear side wall 3i and the supporting shaft hole 3-1; the unit housing 3 further includes a first exhaust port 3-2 for communicating the rear arc extinguishing chamber with the external environment, and a second exhaust port 3-3 for communicating the front arc extinguishing chamber with the external environment; the first exhaust port 3-2 is arranged at one end of the right side wall 3r close to the rear side wall 3i; the second exhaust port 3-3 is provided on one end of the front side wall 3f near the right side wall 3 r.

The first exhaust port 3-2 and the second exhaust port 3-3 are far away from each other and exhaust in different directions, so that the creepage distance and the insulation gap between the two arc extinguishing chambers are increased, and the first exhaust port 3-2 and the second exhaust port 3-3 are concentrated at one end of the unit housing 3, so that the installation of the rotary isolating switch is facilitated, and the rotary isolating switch is particularly suitable for being installed in a narrow space.

As shown in fig. 2 and 14, the unit housing 3 further includes a first air passage including a straight air passage section 3-90 and a C-shaped air passage section 3-91, the straight air passage section 3-90 being juxtaposed with the rear sidewall 3i (the straight air passage section 3-90 is preferably parallel to the rear sidewall 3 i) and communicating with the rear arc extinguishing chamber at one end and communicating with the C-shaped air passage section 3-91 at the other end, the other end of the C-shaped air passage section 3-91 communicating with the first exhaust port 3-2, and the opening of the C-shaped structure of the C-shaped air passage section 3-91 facing the rear sidewall 3i. The first gas passage is beneficial to enlarging the discharge path of arc gas in the rear arc extinguishing cavity through the first gas outlet 3-2, and the arc can be effectively prevented from escaping from the unit shell 3.

As shown in fig. 2 and 14, the unit housing 3 further includes an air passage rib, the air passage rib 3-92 includes a rib first section 3-920 and a rib second section 3-921 which are connected in a bending manner, the rib first section 3-920 is opposite to the second air outlet 3-3, the rib first section 3-920 is preferably parallel to the front side wall 3f, the rib second section 3-921 is spaced opposite to the right side wall 3r, and the rib second section 3-921 is preferably parallel to the right side wall 3 r; the air passage blocking ribs prevent arc gas in the front arc extinguishing cavity from being directly discharged from the second air outlet 3-3, but reach the second air outlet 3-3 after bypassing the air passage blocking ribs, so that the arc is prevented from directly overflowing from the unit shell 3.

As shown in fig. 1-2 and 14, the unit housing 3 further includes a right fixed contact terminal 3-6 disposed in the middle of the right side wall 3r, for accommodating the terminal portion of the right fixed contact 2-1; the unit housing 3 further comprises a plurality of limiting ribs 3-5 arranged on the outer side face of the right side wall 3r, and the first exhaust port 3-2 is positioned in a groove formed between two adjacent limiting ribs 3-5; after the wiring part in the wiring position 3-6 of the right static contact is connected with the external lead, the external lead is prevented from being directly stuck to the first exhaust port 3-2 due to the existence of the limiting convex rib 3-5, and the ablation of the air exhausted from the first exhaust port 3-2 on the insulating skin of the external lead is reduced.

The unit housing 3 further comprises a left fixed contact wiring position 3-8 arranged in the middle of the right side wall 3r and used for matching the wiring part of the left fixed contact 2-2.

As shown in fig. 1, 2 and 14, when the contact system of the present embodiment adopts the first embodiment, the left stationary contact terminal 3-8 is disposed on one end of the left side wall 3l near the front side wall 3f and on one end near the rear side wall 3i; when the two unit housings 3 are stacked together, two left stationary contact wiring positions 3-8 are arranged at intervals, one being arranged on one end of the left side wall 3l near the front side wall 3f, and the other being arranged on one end of the left side wall 3l near the rear side wall 3i.

When the contact system of the embodiment adopts the second embodiment, the structures of the left fixed contact wiring position 3-8 and the right fixed contact wiring position 3-9 are the same, and are mutually in a central symmetrical structure.

As shown in fig. 1, 2 and 14, the unit housing 4 further includes a partition plate 3-4 disposed on the outer side of the right side wall 3r and parallel to the bottom wall 3b, for partitioning the right stationary contact wiring positions 3-6 of the adjacent unit housings 3, that is, partitioning the right stationary contacts 2-1 of the two switch units u, increasing the creepage distance and the insulation gap. Further, the partition plate 3-4 comprises a partition plate main body 3-40 and a partition plate extension part 3-41, one end of the partition plate main body 3-40 is vertically connected with the right side wall 3r, the other end of the partition plate main body is connected with the partition plate extension part 3-41 in a bending way, and the partition plate extension part 3-41 is bent towards the side of the right static contact limiting part 3-6 of the unit shell 3 where the partition plate 3-4 is positioned relative to the partition plate main body 3-40; the partition plate extensions 3-41 further improve the creepage distance and the insulation clearance between the connection terminals of the adjacent switch units u. Further, the included angle between the partition plate body 3-40 and the partition plate extension 3-41 is an obtuse angle.

Specifically, the partition plate extension 3-41 is bent upward with respect to the partition plate body 3-40 in the direction shown in fig. 1.

As shown in fig. 1, 2 and 14, the partition plate extension 3-41 is bent and connected with the middle part of the corresponding end of the partition plate main body 3-40, that is, one end of the partition plate main body 3-40 is connected with the right side wall 3r and the other end is connected with the partition plate extension 3-41, the partition plate extension 3-41 is close to the two ends of the front side plate 3f and the rear side plate 3i, and is retracted towards the middle part relative to the two ends of the partition plate main body 3-40 close to the front side plate 3f and the rear side wall 3i, that is, the partition plate main body 3-40 and the partition plate extension 3-41 are integrally in a convex structure; the structural design of the partition plate main body 3-40 and the partition plate extension part 3-41 can improve the creepage distance and the insulation clearance of the wiring terminals of the adjacent switch units u, and can save materials and cost.

As shown in fig. 1, 2 and 14, the unit housing 3 further includes two sets of separating ribs 3-7 respectively disposed on two radial sides of the support shaft hole 3-1, and the two sets of separating ribs 3-7 are used for separating the front arc extinguishing chamber from the rear arc extinguishing chamber in cooperation with the contact support 1s of the moving contact assembly 1. Further, one ends of the two groups of separation ribs 3-7, which are close to the supporting shaft hole 3-1, are used for being matched with the contact support 1s to separate the movable contact part 1-30 and the static contact part which are positioned in the two arc extinguishing cavities and are adjacent to each other when the movable contact assembly 1 rotates to the opening position. Further, as shown in fig. 9 and 12, the contact support 1s further includes two isolation bosses, the two isolation bosses are disposed on two radial sides of the bearing column 1-201, when the moving contact assembly 1 rotates to the disconnection position, the two isolation bosses are respectively matched with the two groups of separation ribs 3-7 (fit or clearance fit, wherein the fit means that the isolation bosses are matched with the separation ribs 3-7, mutually contact, the clearance fit means that a tiny gap exists between the isolation bosses and the separation ribs 3-7, so that the moving contact assembly 1-30 and the static contact part which are located in the two arc extinguishing cavities and are adjacent to each other are separated, and the moving contact assembly 1 can smoothly rotate), and the two groups of separation ribs 3-7 are further configured so as to support the center of the shaft hole 3-1 as a symmetrical center (that is, the center of symmetry with the first axis) and mutually as a central symmetrical structure.

It should be noted that, in the description of the present utility model, the terms "upper", "lower", "left", "right", "inner", "outer", and the like indicate an orientation or a positional relationship based on that shown in the drawings or an orientation or a positional relationship conventionally put in use, and are merely for convenience of description, and do not indicate that the apparatus or element to be referred to must have a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating relative importance.

The foregoing is a further detailed description of the utility model in connection with the preferred embodiments, and it is not intended that the utility model be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the utility model, and these should be considered to be within the scope of the utility model.

Claims (10)

1. The moving contact assembly comprises a contact support (1 s) and a moving contact (1-3), wherein the contact support (1 s) comprises a bearing column (1-201) arranged in the axial middle of the bearing column and an annular groove surrounding the bearing column (1-201), the moving contact (1-3) is inserted into the bearing column (1-201) and two ends of the moving contact are respectively provided with two moving contact parts (1-30) which are at least partially positioned in the annular groove, the two moving contact parts (1-30) are protruded on the two radial sides of the bearing column (1-201) and divide the annular groove into two groups of semi-annular grooves, the two semi-annular grooves are used for respectively inserting two groups of fixed contacts (2) to be closed and opened with the corresponding moving contact parts (1-30), and one end of each semi-annular groove is provided with a fixed contact position for accommodating the corresponding fixed contact (2) when the moving contact assembly rotates to an open position;

the method is characterized in that: the contact support (1 s) further comprises a space occupying boss protruding along the axial direction of the movable contact assembly, wherein the space occupying boss is arranged on at least one of two opposite inner side surfaces of each group of semi-annular grooves, and at least part of the space occupying boss is positioned between the corresponding movable contact part (1-30) and the fixed contact position.

2. The moving contact assembly of claim 1, wherein: the two ends of the occupying boss extend to the two ends of the inner face of the semi-annular groove where the occupying boss is located respectively in the circumferential direction of the bearing column (1-201).

3. The moving contact assembly of claim 1, wherein: and one end of the occupying boss is adjacent to the bearing column (1-201) in the radial direction of the bearing column (1-201), and the other end of the occupying boss extends to the outer edge of the corresponding semi-annular groove.

4. A moving contact assembly according to claim 3, wherein: the width of the occupying boss in the radial direction of the bearing column (1-201) is the same as the width of the inner side surface of the semi-annular groove where the occupying boss is located.

5. The moving contact assembly of claim 1, wherein: the occupying boss is provided with a plurality of grooves, and the grooves are arranged side by side at intervals along the circumferential direction of the bearing column (1-201).

6. The moving contact assembly of claim 1, wherein: and the two inner side surfaces of each group of semi-annular grooves are respectively provided with a space occupying boss, and the two groups of space occupying bosses are oppositely protruded.

7. The moving contact assembly of claim 1, wherein: the contact support (1 s) further comprises an upper side plate (1-10) and a lower side plate (1-200), wherein the upper side plate (1-10) and the lower side plate (1-200) are arranged on two axial sides of the bearing column (1-201), and annular grooves are formed between the upper side plate (1-10) and the lower side plate (1-200); the lower side plate (1-200) is provided with two groups of avoidance notches which are respectively communicated with the two groups of semi-annular grooves, and the avoidance notches are used for allowing the corresponding fixed contact (2) to pass through and enter the corresponding semi-annular grooves.

8. The movable contact assembly of claim 7, wherein: the two avoidance notches are communicated with the two groups of static contact positions relatively.

9. The moving contact assembly of claim 1, wherein: the contact support (1 s) comprises a support cover (1-1) and a support seat (1-2) which are relatively spliced, wherein the support cover (1-1) comprises an upper side plate (1-10), and the support seat (1-2) comprises a bearing column (1-201) and a lower side plate (1-200); the contact support (1 s) further comprises a plug part and a jack part which are respectively arranged at two axial ends of the contact support, the plug part comprises a main plug (1-11) and an auxiliary plug (1-22), the main plug (1-11) is arranged on one side of the upper side plate (1-10) which is far away from the support seat (1-2), the auxiliary plug (1-22) is arranged on one end of the bearing column (1-201) which faces the support cover (1-1), and the auxiliary plug (1-22) passes through a support cover hole (1-12) of the support cover (1-1) and is parallel to the main plug (1-11); the jack part is arranged on the supporting seat (1-2) and is matched with the plug part.

10. The moving contact assembly of claim 9, wherein: the rotation axis of the contact support (1 s) passes through the middle part of the main plug (1-11), the main plug (1-11) and the auxiliary plugs (1-22) are arranged at intervals, and the two groups of auxiliary plugs (1-22) are respectively arranged at two sides of the main plug (1-11); the jack part comprises a main jack (1-26) and an auxiliary jack (1-25), the main jack (1-26) is matched with the main plug (1-11), and the auxiliary jack (1-25) is matched with the auxiliary plug (1-22).