CN108666164B - Rotary electrical switch contact system and rotary electrical switch - Google Patents
Rotary electrical switch contact system and rotary electrical switch Download PDFInfo
- Publication number
- CN108666164B CN108666164B CN201810232471.3A CN201810232471A CN108666164B CN 108666164 B CN108666164 B CN 108666164B CN 201810232471 A CN201810232471 A CN 201810232471A CN 108666164 B CN108666164 B CN 108666164B
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- 230000000712 assembly Effects 0.000 claims abstract description 19
- 238000000429 assembly Methods 0.000 claims abstract description 19
- 230000003068 static effect Effects 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 230000007704 transition Effects 0.000 claims description 8
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 230000007246 mechanism Effects 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 2
- 238000004880 explosion Methods 0.000 claims 2
- 230000009286 beneficial effect Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 2
- 238000005452 bending Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 229910001316 Ag alloy Inorganic materials 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/08—Bases; Stationary contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/10—Movable parts; Contacts mounted thereon
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/02—Details
- H01H19/10—Movable parts; Contacts mounted thereon
- H01H19/14—Operating parts, e.g. turn knob
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H19/00—Switches operated by an operating part which is rotatable about a longitudinal axis thereof and which is acted upon directly by a solid body external to the switch, e.g. by a hand
- H01H19/64—Encased switches adapted for ganged operation when assembled in a line with identical switches, e.g. stacked switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
Landscapes
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
Abstract
The invention relates to the technical field of electrical switches, in particular to a rotary electrical switch contact system and a rotary electrical switch comprising the same; the rotary electric switch contact system comprises a module contact system, wherein the module contact system comprises a moving contact assembly and a pair of fixed contact assemblies, the moving contact assembly comprises a moving contact, the fixed contact assembly comprises a fixed contact connecting piece and an elastic piece, when the moving contact is connected with the fixed contact connecting piece, the elastic piece is compressed, and when the moving contact is disconnected, the elastic piece relaxes to enable the moving contact connecting piece to move towards the moving contact assembly; according to the rotary electric switch contact system, the movable/fixed contact assemblies are reliably contacted, so that the temperature rise of the contact system can be effectively controlled, and the movable/fixed contact assemblies are prevented from being burnt; the rotary electric switch can avoid unstable performance or scrapping caused by burning loss of a contact system, and has longer service life.
Description
Technical Field
The invention relates to the technical field of electrical switches, in particular to a rotary electrical switch contact system and a rotary electrical switch comprising the same.
Background
The rotary electrical switch may include a plurality of switch modules, each including a rotary contact and a plurality of stationary contacts, for simultaneously switching the current of a plurality of loops, but most are used for switching lower voltage and lower power loop control.
The existing rotary electric switch has the following problems:
1. the arc extinguishing mode is simple, and the switching of a high-power alternating current and/or direct current loop is difficult to realize.
2. The existing high-power rotary electric switch generally adopts a knife switch type contact system, a rotary contact adopts a double-blade type structure, the contact pressure is difficult to control by means of the material elasticity of the double blades as contact pressure, when the temperature rise is higher, the material elasticity is weakened, the contact pressure is reduced, the temperature rise is increased, the contact pressure is reduced again, the temperature rise is continuously increased, and vicious circulation is caused to cause failure or even combustion of a product.
3. When the rotary electric switch is disconnected, the materials at the openings of the double blades are usually burnt, so that resistance is generated, and the static contact is difficult to insert, thereby causing the failure of the switch.
4. When the switching power of the rotary switch is larger, the material sectional area of the rotary contact needs to be larger in order to reduce the temperature rise, the contact pressure is increased due to the large material section, the operating force of the handle is increased, the operation control system of the whole product needs to be larger, and the strength requirement of the material is high.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a rotary electric switch contact system, wherein a moving contact assembly and a fixed contact assembly of the rotary electric switch contact system are reliably contacted, so that the temperature rise of the contact system can be effectively controlled, and the burning loss of the moving contact assembly and the fixed contact assembly due to overhigh temperature is avoided; the rotary electric switch comprises the rotary electric switch contact system, so that unstable performance or scrapping of the rotary electric switch caused by burning loss of the contact system can be avoided, and the service life of the rotary electric switch is longer.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a rotary electrical switch contact system comprising at least one modular contact system, each modular contact system comprising a moving contact assembly 21 and at least one pair of stationary contact assemblies 28 for use with the moving contact assembly 21;
the moving contact assembly 21 comprises a moving contact 211, and two moving contacts 2112 are respectively arranged at two ends of the moving contact 211; the fixed contact assembly 28 comprises a fixed contact connector 284, one end of the fixed contact connector 284 is in contact fit with the movable contact 2112, and the other end of the fixed contact connector 284 is elastically connected with the housing of the rotary electric switch through an elastic element 285;
the moving contact 211 rotates to drive the moving contact 2112 to perform a circular motion, so as to realize the on/off of the moving contact 2112 and the fixed contact connector 284, when the moving contact 2112 is connected with the fixed contact connector 284, the fixed contact connector 284 is moved in a direction away from the moving contact assembly 21, the elastic element 285 is compressed, and when the moving contact 211 is disconnected with the fixed contact connector 284, the elastic element 285 relaxes to move the fixed contact connector 284 in a direction of the moving contact assembly 21.
Preferably, the stationary contact connector 284 has a U-shaped structure and includes a stationary contact portion 2840 and a push plate portion 2842 that are disposed opposite to each other, the stationary contact portion 2840 is matched with the movable contact 2112, the push plate portion 2842 is elastically connected to the housing of the rotary electric switch by an elastic element 285, and the stationary contact portion 2840 is connected to the push plate portion 2842 by a bottom plate portion 2841;
the fixed contact assembly 28 further includes a fixed contact 283 fixedly disposed on the housing of the rotary electrical switch, the fixed contact 283 being electrically connected to the external circuit, the fixed contact 283 being snapped into the U-shaped configuration of the fixed contact connector 284 in sliding contact with the base plate portion 2841.
Preferably, a soft link 286 for carrying current is further disposed between the push plate 2842 and the fixed contact 283, and is electrically connected to the push plate 2842 and the fixed contact 283.
Preferably, the stationary contact 283 includes a contact main board 2830, a contact conductive plate 2831 slidably contacting with a bottom plate 2841 is disposed in the middle of the contact main board 2830, the length of the contact conductive plate 2831 is smaller than the distance between the push plate 2842 and the stationary contact 2840, the contact main board 2830 is provided with a connector slot 2834, the connector slot 2834 is located on one side of the contact conductive plate 2831, and the bottom plate 2841 is clamped in the connector slot 2834.
Preferably, two ends of the contact motherboard 2830 are respectively provided with a contact electrical arm 2832 bent towards the same side of the contact motherboard 2830, and the contact conductive plate 2831 and the contact electrical arm 2832 extend towards the same side.
Preferably, contact transition portions 2843 are further disposed at two ends of the stationary contact portion 2840, and the contact transition portions 2843 are connected to the stationary contact portion 2840 at an obtuse angle and are bent toward the push plate portion 2842.
Preferably, the moving contact assembly 21 includes a contact support 210 and a moving contact 211, the moving contact 211 includes a moving contact bridge 2110, two ends of the moving contact bridge 2110 are respectively provided with a moving contact 2112, one end middle of the contact support 210 is provided with a moving contact mounting hole 2104, and the moving contact 211 is inserted into the moving contact mounting hole 2104.
Preferably, the contact support 210 includes a movable contact fixing end 2102 and a contact support connecting end 2100, the movable contact fixing end 2102 is a polygonal cylinder, a movable contact mounting hole 2104 is disposed in the middle, the contact support connecting end 2100 is provided with a polygonal contact support connecting slot 2103, and the contact support connecting slot 2103 is matched with the movable contact fixing end 2102.
Preferably, the contact support 210 further includes a contact support dial 2101 disposed between the movable contact fixed end 2102 and the contact support link 2100, the contact support dial 2101 being rotatably coupled to the housing of the rotary electrical switch.
A rotary electrical switch comprising said rotary electrical switch contact system;
also included is a rotary control mechanism 1 and at least one switch module 2, each switch module 2 including a switch module housing 20 and a module contact system disposed within the switch module housing 20.
Preferably, the arc extinguishing chambers 23 are disposed on both sides of the stationary contact 2840 of the stationary contact connector 284.
Preferably, the fixed contact 283 of the fixed contact assembly 28 is fixedly disposed in the switch module housing 20, and two ends of the contact main board 2830 of the fixed contact 283 are respectively connected with the arc extinguishing chambers 23 at two sides of the fixed contact 2840.
Preferably, the inlet end of the arc-extinguishing chamber 23 is in an arc-shaped structure and is matched with the moving contact assembly 21, the arc-extinguishing chamber 23 comprises two opposite grid sheet fixing plates 230 and a plurality of arc-extinguishing grid sheets 231 which are arranged at intervals and are positioned between the two grid sheet fixing plates 230, and the arc-extinguishing grid sheets 231 are iron arc-extinguishing grid sheets.
Preferably, the middle part of the switch module housing 20 is provided with a moving contact assembly mounting groove 201, two ends are respectively provided with two connecting terminal mounting grooves 204, a fixed contact connecting piece mounting groove 209 is arranged between the two connecting terminal mounting grooves 204 at the same end of the switch module housing 20, a fixed contact bridge 280 of the fixed contact assembly 28 is arranged between the fixed contact connecting piece mounting groove 209 and the moving contact assembly mounting groove 201, a plurality of arc extinguishing chamber mounting grooves 203 are circumferentially arranged at the outer side of the moving contact assembly mounting groove 201, one end of each arc extinguishing chamber mounting groove 203 is communicated with the moving contact assembly mounting groove 201, and the other end of each arc extinguishing chamber mounting groove 203 is communicated with the outside of the rotary electric switch through an air outlet 205 arranged at the upper side of the switch module housing 20.
The rotary electric switch contact system comprises a moving contact component and a fixed contact component matched with the moving contact component, wherein the fixed contact component comprises a fixed contact connecting piece, one end of the fixed contact connecting piece is in contact fit with a moving contact of the moving contact component, the other end of the fixed contact connecting piece is elastically connected with a shell of a rotary electric switch through an elastic piece, when the moving contact and the fixed contact connecting piece are connected, the elastic piece is in a compressed state, necessary contact force is provided for the moving contact and the fixed contact connecting piece, the structural size of the moving contact connecting piece and the moving contact is not required to be increased, and/or the material requirement on the moving contact/fixed contact connecting piece is too high, the temperature rise of the moving contact/fixed contact component can be effectively limited, the burning loss of the moving contact/fixed contact component is avoided, the good electric performance of the rotary electric switch contact system can be applied to the switching of an alternating current loop/direct current loop with higher power, meanwhile, the occupied assembly space is saved, and the manufacturing cost is controlled. In addition, the fixed contact piece comprises a contact piece main board, the fixed contact piece connecting piece comprises a push plate part, and the contact piece main board is connected with the push plate part through a soft connecting piece, so that the reliable connection between the fixed contact piece and the fixed contact piece connecting piece is ensured. In addition, the static contact piece comprises two contact piece electricity receiving arms, each contact piece electricity receiving arm is matched with one wiring terminal for use, and a user can conveniently wire a rotary electric switch contact system, and the operation is simple and convenient and the efficiency is high.
The rotary electric switch comprises the rotary electric switch contact system, so that the condition that a moving contact assembly and/or a static contact assembly are burnt due to overlarge temperature rise of the contact system is avoided, the reliability of the electric performance of the rotary electric switch is ensured, and the service life of the rotary electric switch is prolonged. In addition, the two sides of the fixed contact connecting piece of each fixed contact assembly are respectively provided with an arc extinguishing chamber, the two ends of the fixed contact piece of each fixed contact assembly are respectively connected with the two arc extinguishing chambers, the arc can be rapidly introduced into the arc extinguishing chambers to extinguish, no matter the moving contact assembly rotates forwards or reversely, the arc extinguishing grid piece of the further arc extinguishing chamber is an iron arc extinguishing grid piece, the magnetic field generated by the moving/fixed contact loop and the magnetic field generated by magnetizing the iron arc extinguishing grid piece are beneficial to driving the arc into the arc extinguishing chambers, and the fixed plate of the arc extinguishing grid piece of the arc extinguishing chamber generates gas under the burning of the arc, so that the internal pressure of the switch module rises, the arc can be blown into the arc extinguishing chambers further, the efficiency and the performance of the rotary electric switch are guaranteed, the breaking capacity of the rotary electric switch are improved, and the rotary electric switch can be suitable for alternating current circuits and direct current circuits with higher power, and the safety of users is guaranteed.
Drawings
FIG. 1 is a schematic diagram of a rotary electrical switch of the present invention;
FIG. 2 is a schematic diagram of the switch module of the present invention;
FIG. 3 is an assembled schematic view of the moving contact assembly, the stationary contact assembly and the switch module housing of the present invention;
FIG. 4 is a schematic view of the structure of the contact support of the present invention;
FIG. 5 is a schematic view of the structure of the moving contact of the present invention;
FIG. 6 is a schematic view of the structure of the stationary contact plate of the present invention;
FIG. 7 is a schematic view of the structure of the stationary contact connector of the present invention;
fig. 8 is a schematic structural view of the arc extinguishing chamber of the present invention.
Detailed Description
Embodiments of the rotary electrical switch contact system of the present invention are further described below with reference to the examples shown in fig. 2-7. The rotary electric switch contact system of the present invention is not limited to the description of the following embodiments.
The rotary electrical switch contact system of the present invention comprises at least one modular contact system, each modular contact system comprising a moving contact assembly 21 and at least one pair of stationary contact assemblies 28 for use with the moving contact assembly 21;
the moving contact assembly 21 comprises a moving contact 211, and two moving contacts 2112 are respectively arranged at two ends of the moving contact 211; the fixed contact assembly 28 comprises a fixed contact connector 284, one end of the fixed contact connector 284 is in contact fit with the movable contact 2112, and the other end of the fixed contact connector 284 is elastically connected with the shell of the rotary electric switch through an elastic piece;
the moving contact 211 rotates to drive the moving contact 2112 to perform a circular motion, so as to realize the on/off of the moving contact 2112 and the fixed contact connector 284, when the moving contact 2112 is connected with the fixed contact connector 284, the fixed contact connector 284 is moved away from the moving contact assembly 21, and the elastic member is compressed, when the moving contact 211 is disconnected with the fixed contact connector 284, the elastic member relaxes to move the fixed contact connector 284 toward the moving contact assembly 21.
The invention relates to a rotary electric switch contact system, which comprises a moving contact component and a fixed contact component matched with the moving contact component, wherein the fixed contact component comprises a fixed contact connecting piece, one end of the fixed contact connecting piece is contacted and matched with a moving contact of the moving contact component, and the other end of the fixed contact connecting piece is elastically connected with a shell of a rotary electric switch through an elastic piece.
In the direction shown in fig. 2 and 3, which is an embodiment of the rotary electric switch contact system of the present invention, in fig. 2, the moving contact 211 of the moving contact assembly 21 and the stationary contact connecting piece of the stationary contact assembly 28 are in an on state, and in fig. 3, the moving contact assembly 21 and the stationary contact assembly 28 are in an off state.
The rotary electric switch contact system comprises at least one module contact system, each module contact system comprises a moving contact assembly 21 and at least one pair of fixed contact assemblies 28 in contact fit with the moving contact assembly 21, and the two fixed contact assemblies 28 are arranged at the left end and the right end of the switch module shell 20 and are positioned at the two radial ends of the moving contact assembly 21. This structural arrangement ensures that the opening distance between the two stationary contact assemblies 28 is maximized, which is advantageous for improving the breaking performance of the rotary electrical switch of the present invention.
The moving contact assembly 21 includes a contact support 210 and a moving contact 211, the contact support 210 is rotatably disposed in the middle of the switch module housing 20, the moving contact 211 is disposed in the middle of one end of the contact support 210, and two moving contacts 2112 are respectively disposed at two ends of the moving contact 211. The fixed contact assembly 28 includes a fixed contact 283, a fixed contact connector 284, and an elastic member 285, the fixed contact connector 284 is slidably disposed in the fixed contact connector mounting slot 209 of the switch module housing 20, the fixed contact portion 2840 of the fixed contact connector 284 is in contact engagement with the movable contact 2112, the push plate part 2842 of the fixed contact connector 284 is connected with the side wall of the fixed contact connector mounting groove 209 through an elastic piece 285, the fixed contact 283 is fixedly arranged on the switch module housing 20 and clamps the middle part of the fixed contact connector 284, and the lower side of the fixed contact 283 is in sliding contact with the bottom plate part 2841 of the fixed contact connector 284.
In the direction shown in fig. 2, when the movable contact 2112 of the movable contact assembly 21 is connected with the fixed contact connector 284 of the fixed contact assembly 28, the fixed contact connector 284 moves away from the movable contact assembly 21, the elastic element 285 is compressed, and the elastic element 285 gives a certain thrust to the fixed contact connector 284 when in connection, so that a certain pressure is kept between the fixed contact connector 284 and the movable contact 211, good contact conduction between the movable contact assembly 21 and the fixed contact assembly 28 is ensured, the temperature rise of the movable/fixed contact assembly is effectively controlled, the burning loss of the movable/fixed contact assembly due to the overhigh temperature is avoided, and the service life of the rotary electrical switch contact system is prolonged.
Preferably, in the direction shown in fig. 2, a soft link 286 for conducting and carrying current is disposed between the fixed contact 283 and the push plate portion 2842 of the fixed contact connector 284. The soft link 286 ensures a reliable electrical connection between the stationary contact 283 and the stationary contact connector 284.
Preferably, the rotary electrical switch contact system of the present invention comprises a plurality of modular contact systems, the moving contact assemblies 21 of each modular contact system cooperating with at least two stationary contact assemblies 28, the plurality of moving contact assemblies 21 being connected to each other by respective contact supports 210, as shown in the orientation of fig. 3. In the lower module contact system, the moving contact 211 is inserted into the moving contact fixing end 2102 of the contact support 210, the contact support connecting end 2100 of the upper contact support 210 is in clamping fit with the moving contact fixing end 2102 of the lower contact support 210, and the moving contact 211 of the lower module contact system is pressed and fixed in the corresponding moving contact fixing end 2102.
The rotary electric switch contact system has the advantages that the connection mode of the plurality of moving contact assemblies 21 is simple, the assembly is convenient, and the synchronous rotation of each moving contact assembly 21 is ensured.
For a better understanding of the rotary electric switch contact system of the present invention, the components of the present invention will be further described below with reference to the drawings and the specific examples.
As shown in fig. 2, 6 and 7, one embodiment of the stationary contact assembly 28 of the present invention is illustrated.
The stationary contact assembly 28 of the present invention includes a stationary contact 283, a stationary contact connector 284, an elastic member 285, and a soft link 286.
In the direction shown in fig. 6, the fixed contact 283 is of an integral structure, and includes a contact main board 2830, a contact conductive plate 2831 is disposed in the middle of the contact main board 2830, the contact conductive plate 2831 is formed by bending a portion of the front side of the middle of the contact main board 2830 downward, a connector clamping groove 2834 is disposed in the front side of the contact conductive plate 2831 in the middle of the contact main board 2830, a bottom plate portion 2841 of the fixed contact connector 284 is clamped in the connector clamping groove 2834, the contact conductive plate 2831 is in sliding contact with the bottom plate portion 2841 of the fixed contact connector 284, a contact power receiving arm 2832 is disposed at each of the left and right ends of the contact main board 2830, the contact conductive arms 2832 are formed by bending the left and right ends of the contact main board 2830 downward, and each contact power receiving arm 2832 is matched with one connecting terminal 24.
Preferably, as shown in fig. 6, two limiting bosses 2833 are respectively disposed on two sides of the lower end of the contact power receiving arm 2832, the two limiting bosses 2833 extend toward front and rear sides of the contact power receiving arm 2832, the width of the contact main board 2830 is greater than the width of the contact power receiving arm 2832, and front and rear ends of the contact main board 2830 protrude toward the front and rear sides of the contact power receiving arm 2832, so that the wire frame of the wire connecting terminal 24 can freely move when being sleeved on the contact power receiving arm 2832.
The fixed contact 283 of the invention has an integrated structure, has simple structure, is convenient for production, and is beneficial to improving the production efficiency.
In the direction shown in fig. 7, the stationary contact connector 284 has an integral U-shaped structure, which includes a left stationary contact portion 2840 and a right push plate portion 2842 disposed opposite to each other, wherein the lower end of the stationary contact portion 2840 is connected to the lower end of the push plate portion 2842 by a bottom plate portion 2841, and the distance between the two is greater than the length of the contact conductive plate 2831 of the stationary contact 284, so that the stationary contact 283 and the stationary contact connector 284 have a certain degree of freedom of movement when they are mated.
Preferably, as shown in fig. 7, a contact transition portion 2843 is disposed at each of the front and rear ends of the stationary contact portion 2840, the contact transition portion 2843 is connected to the stationary contact portion 2840 at an obtuse angle, and is bent toward the push plate portion 2842. The contact transition portion 2843 makes the connection between the movable contact 2112 and the stationary contact 2840 of the movable contact assembly 21 smoother, so as to avoid the situation that the stationary contact 2112 is blocked at the end of the stationary contact 2840, and the movable contact 2112 and the stationary contact 2840 cannot be closed.
Preferably, as shown in fig. 2 and 3, the elastic member 285 is a spring.
Preferably, the soft link 286 is a copper braid soft link.
As shown in fig. 2-5, one embodiment of the moving contact assembly 21 of the present invention is shown.
The moving contact assembly 21 includes a contact support 210 and a moving contact 211.
As shown in the direction of fig. 4, the contact support 210 includes a contact support connection end 2100 at the upper end, a moving contact fixing end 2102 at the lower end, and a contact support rotary table 2101 disposed in the middle of the contact support 210, a polygonal contact support connection slot 2103 matched with the moving contact fixing end 2102 is disposed in the middle of the contact support connection end 2100, the moving contact fixing end 2102 is a polygonal cylinder, a moving contact mounting hole 2104 is disposed in the middle of the moving contact fixing end 2102, a moving contact 211 is inserted into the moving contact mounting hole 2104, and the contact support rotary table 2101 is matched with and rotationally matched with the moving contact assembly mounting slot 201 of the switch module housing 20.
As shown in fig. 5, the moving contact 211 includes a moving contact bridge 2110, two ends of the moving contact bridge 2110 are respectively bent towards the upper side to form two moving contact mounting portions, each moving contact mounting portion is provided with a moving contact 2112, two moving contact bridge limiting bosses 2111 are respectively disposed on front and rear sides of the middle of the moving contact bridge 2110, two moving contact bridge limiting bosses 2111 disposed on the same side edge of the moving contact bridge 2110 are disposed at intervals, the intervals of the two moving contact bridge limiting bosses are matched with the length of the moving contact mounting hole 2104, the moving contact bridge 2110 is clamped in the moving contact fixing end 2102 through the moving contact bridge limiting bosses 2111, and the lengths of portions of the moving contact bridge 2110 protruding at two ends of the moving contact fixing end 2102 are identical.
Preferably, the movable contact 2112 is made of a silver alloy material.
As shown in fig. 2 and 3, when the moving contact 211 and the contact support 210 are assembled, the moving contact bridge 2110 is inserted into the moving contact mounting hole 2104, the four moving contact bridge limiting bosses 2111 are respectively clamped at the outer sides of two ends of the moving contact mounting hole 2104, and the other contact support 210 is sleeved with the contact support connecting end 2103 of the other contact support 210 on the moving contact fixing end 2102 of the contact support 210 from above, so that the moving contact 211 is reliably positioned.
The movable contact assembly 21 has a simple structure, is convenient to process and assemble, is beneficial to improving the production and assembly efficiency, and ensures the action consistency of each movable contact assembly 21 by sequentially connecting a plurality of movable contact assemblies 21 through respective contact supports 210.
The invention also discloses a rotary electric switch comprising any one of the rotary electric switch contact systems.
As shown in fig. 1-3 and 8, one embodiment of the rotary electrical switch of the present invention is shown.
As shown in fig. 1, the rotary electric switch of the present invention includes a rotary control mechanism 1 at an upper portion, a plurality of switch modules 2 provided below the rotary control mechanism 1, and a mounting module 3 provided below the plurality of switch modules 2, the plurality of switch modules 2 being stacked in order from top to bottom, and each switch module 2 having the same structure without any particular explanation.
The rotation control mechanism 1 includes a switch handle 10.
The mounting module 3 includes a switch mounting structure provided at a lower portion thereof, the switch mounting structure including a switch mounting groove 50 and a switch clip 51 provided at one side of the switch mounting groove 50, the switch mounting structure being implemented by a conventional art, and will not be described in detail herein.
Preferably, the rotary electric switch of the present invention may be configured such that the switch mounting structure is provided at the lower portion of the lowermost switch module 2 without providing the mounting module 3, and in this case, the rest of the structures of the switch modules 2 are identical except that the lowermost switch module 2 includes the switch mounting structure.
In the direction shown in fig. 2, the switch module 2 includes a switch module housing 20, a moving contact assembly 21, a fixed contact assembly 28, an arc extinguishing chamber 23 and a connection terminal 24 disposed in the switch module housing 20, the moving contact assembly 21 is rotatably disposed in the middle of the switch module housing 20, two fixed contact assemblies 28 are disposed at left and right ends of the switch module housing 20 and are respectively matched with the moving contact assembly 21, four arc extinguishing chambers 23 are axially disposed at outer sides of the moving contact assembly 21, so that the arc extinguishing chambers 23 are disposed at upper and lower sides of a fixed contact portion of a fixed contact connector 284 of the fixed contact assembly 28, two connection terminals 24 are disposed at left and right ends of the switch module housing 20, and two contact member connection plates 2832 of a fixed contact member 283 of the fixed contact assembly 28 disposed at a left end (right end) of the switch module housing 20 are respectively connected with one connection terminal 24.
The movable contact assemblies 21 of the plurality of switch modules 2 of the rotary electric switch are sequentially connected through respective contact supports 210 to realize linkage, the uppermost contact support 210 is in driving connection with the switch handle 10 of the switch control mechanism 1, and the lowermost contact support 210 is in rotary connection with the corresponding switch module shell 20.
Preferably, as shown in fig. 2, the upper and lower ends of the fixed contact member 283 of the fixed contact assembly 28 are respectively connected to the two arc extinguishing chambers 23. The structure is beneficial to leading the electric arc generated by the separation of the moving and fixed contacts into the arc extinguishing chamber through the fixed contact main board 2830 of the fixed contact member 283 under the drive of the magnetic field of the moving and fixed contact circuit, and is beneficial to improving the arc extinguishing efficiency and performance of the rotary electric switch, so that the rotary electric switch is suitable for switching of an alternating current circuit, a direct current circuit and/or a direct current circuit with higher power.
As shown in fig. 8, the arc extinguishing chamber 23 includes a pair of opposite gate fixing plates 230 and a plurality of arc extinguishing gate plates 231 disposed between the two gate fixing plates 230 at intervals, and the front end of the arc extinguishing chamber 23 has an arc-shaped structure to match the movement track of the moving contact 2112 of the moving contact assembly 21.
Preferably, the arc-extinguishing gate 231 is an iron arc-extinguishing gate, which can be magnetized under the action of the magnetic field of the moving/static contact, so as to further drive the arc to move toward the arc-extinguishing chamber 23, which is beneficial to further improving the arc-extinguishing efficiency and performance of the rotary electric switch of the invention.
Preferably, the rotary electric switch of the present invention further comprises a shorting plate for shorting the two stationary contact assemblies 28 at the same end of the adjacent two switch module housings 20.
As shown in fig. 3, the switch module housing 20 includes a moving contact assembly mounting groove 201 disposed in the middle of the switch module housing 20, the moving contact assembly 21 is rotatably disposed in the moving contact assembly mounting groove 201 through a contact support 210, a first mounting hole 202 through which a contact support connection end 2100 of the contact support 210 passes is disposed in the middle of the moving contact assembly mounting groove 201, an inner diameter of the first mounting hole 202 matches an outer diameter of the contact support 2100, two terminal mounting grooves 204 are disposed at left and right ends of the switch module housing 20, a terminal 24 is disposed in the terminal mounting groove 204, each terminal mounting groove 204 includes a terminal hole 2040 engaged with a terminal frame of the terminal 24 and an operating hole 2041 engaged with a terminal screw of the terminal 24, a fixed contact connecting piece mounting groove 209 is disposed between the two terminal mounting grooves 204 at the left end (right end), a fixed contact connecting piece 284 of the fixed contact assembly 28 is slidably disposed in the fixed contact connecting piece mounting groove 209, a push plate 2842 of the fixed contact connecting piece 284 is connected to a side wall of the fixed contact connecting piece mounting groove 209 through an elastic piece 285, the fixed contact connecting piece 209 is disposed in the side wall of the fixed contact connecting piece mounting groove, the fixed contact assembly is disposed in the moving contact assembly mounting groove 201, and the fixed contact assembly is disposed in the moving contact assembly mounting groove 201 is disposed at one end of the moving contact assembly mounting groove 201, which is disposed at the movable contact assembly side of the moving contact assembly 23, and the movable contact assembly is disposed at the movable contact assembly 23, and the movable contact assembly is disposed in the movable contact assembly mounting groove 201, the movable contact assembly is disposed at the movable contact assembly mounting groove 23, and the movable contact assembly is disposed in the movable contact assembly 23, the movable contact assembly is in the movable contact assembly mounting groove 23, and the movable contact assembly is in the movable contact assembly mounting groove is in the movable contact assembly 20, and the movable contact assembly 28 is in the movable contact assembly 20, the movable contact assembly mounting assembly is in the movable contact assembly 20, and the movable contact assembly is in the movable contact assembly 20, the movable contact assembly, and the movable contact assembly, the other end is communicated with the outside of the rotary electric switch through an air outlet 205 arranged on the switch module shell 2, and an arc extinguishing chamber isolation structure 232 is arranged between two arc extinguishing chamber mounting grooves 203 on the upper side (lower side).
Preferably, as shown in fig. 3, a shorting plate jack 250 is disposed in the middle of the binding terminal mounting slot 204, and the shorting plate passes through the shorting plate jack 250 to short-circuit the two stationary contact assemblies 28 at the same end of the two adjacent switch module housings 20.
According to the rotary electric switch, the movable contact assembly and the fixed contact assembly are in stable contact, the temperature rise of the movable/fixed contact assembly is effectively controlled, the movable/fixed contact assemblies are prevented from being burnt due to the fact that the temperature is too high, the two sides of the fixed contact connecting piece of each fixed contact assembly are respectively provided with the arc extinguishing chambers, the two ends of the fixed contact piece of each fixed contact assembly are respectively connected with the two arc extinguishing chambers, an arc can be rapidly led into the arc extinguishing chambers to extinguish, no matter the movable contact assembly rotates forwards or reversely, the arc extinguishing chambers can be effectively extinguished, further arc extinguishing grid plates of the arc extinguishing chambers are iron arc extinguishing grid plates, the magnetic field generated by a movable/fixed contact loop and the magnetic field generated by magnetizing the iron arc extinguishing grid plates are beneficial to driving the arc extinguishing chambers, and the fixed plates of the arc extinguishing chambers generate gas under the burning of the arc, so that the internal pressure of the switch module rises, the arc is beneficial to further blowing the arc into the arc extinguishing chambers, the arc extinguishing efficiency and the performance of the rotary electric switch are guaranteed, the breaking capacity of the rotary electric switch can be suitable for alternating current circuits with higher power, direct current circuits and even switching safety of users with higher power are guaranteed.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention 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 invention, and these should be considered to be within the scope of the invention.
Claims (14)
1. A rotary electrical switch contact system comprising at least one modular contact system, each modular contact system comprising a moving contact assembly (21) and at least one pair of stationary contact assemblies (28) for use with the moving contact assembly (21);
the method is characterized in that: the movable contact assembly (21) comprises a movable contact (211), and two ends of the movable contact (211) are respectively provided with a movable contact (2112); the static contact assembly (28) comprises a static contact connecting piece (284), one end of the static contact connecting piece (284) is in contact fit with the movable contact (2112), and the other end of the static contact connecting piece is elastically connected with the shell of the rotary electric switch through an elastic piece (285);
the movable contact (211) rotates to drive the movable contact (2112) to perform circular motion, so that the movable contact (2112) and the fixed contact connecting piece (284) are connected/disconnected, when the movable contact (2112) and the fixed contact connecting piece (284) are connected, the fixed contact connecting piece (284) is enabled to move in a direction away from the movable contact assembly (21), the elastic piece (285) is compressed, and when the movable contact (211) and the fixed contact connecting piece (284) are disconnected, the elastic piece (285) is enabled to relax, and the fixed contact connecting piece (284) is enabled to move in the direction of the movable contact assembly (21).
2. The rotary electrical switch contact system of claim 1, wherein:
the static contact connecting piece (284) is of a U-shaped structure and comprises a static contact part (2840) and a push plate part (2842) which are oppositely arranged, the static contact part (2840) is matched with the movable contact (2112), the push plate part (2842) is elastically connected with a shell of the rotary electric switch through an elastic piece (285), and the static contact part (2840) is connected with the push plate part (2842) through a bottom plate part (2841);
the static contact assembly (28) further comprises a static contact piece (283) fixedly arranged on the shell of the rotary electric switch, the static contact piece (283) is electrically connected with an external circuit, and the static contact piece (283) is clamped in the U-shaped structure of the static contact connecting piece (284) and is in sliding contact with the bottom plate part (2841).
3. The rotary electrical switch contact system of claim 2, wherein: a soft connecting piece (286) for carrying current, which is respectively electrically connected with the push plate part (2842) and the fixed contact piece (283), is also arranged between the push plate part (2842) and the fixed contact piece (283).
4. The rotary electrical switch contact system of claim 2, wherein: the static contact (283) comprises a contact main board (2830), a contact conducting plate (2831) in sliding contact with a bottom plate part (2841) is arranged in the middle of the contact main board (2830), the length of the contact conducting plate (2831) is smaller than the distance between a push plate part (2842) and a static contact part (2840), a connecting piece clamping groove (2834) is formed in the contact main board (2830), the connecting piece clamping groove (2834) is located on one side of the contact conducting plate (2831), and the bottom plate part (2841) is clamped in the connecting piece clamping groove (2834).
5. The rotary electrical switch contact system of claim 4, wherein: the two ends of the contact main board (2830) are respectively provided with a contact power receiving arm (2832) bent towards the same side of the contact main board (2830), and the contact conducting board (2831) and the contact power receiving arm (2832) extend towards the same side.
6. The rotary electrical switch contact system of claim 2, wherein: the two ends of the stationary contact part (2840) are also provided with contact transition parts (2843), the contact transition parts (2843) are connected with the stationary contact part (2840) at an obtuse angle, and the contact transition parts are bent towards the push plate part (2842).
7. The rotary electrical switch contact system of claim 1, wherein: the movable contact assembly (21) comprises a contact support (210) and a movable contact (211), the movable contact (211) comprises a movable contact bridge (2110), two ends of the movable contact bridge (2110) are respectively provided with a movable contact (2112), one end middle part of the contact support (210) is provided with a movable contact mounting hole (2104), and the movable contact (211) is inserted into the movable contact mounting hole (2104).
8. The rotary electrical switch contact system of claim 7, wherein: the contact support (210) comprises a movable contact fixed end (2102) and a contact support connecting end (2100), the movable contact fixed end (2102) is a polygonal cylinder, a movable contact mounting hole (2104) is formed in the middle of the movable contact fixed end, the contact support connecting end (2100) is provided with a polygonal contact support connecting groove (2103), and the contact support connecting groove (2103) is matched with the movable contact fixed end (2102).
9. The rotary electrical switch contact system of claim 8, wherein: the contact support (210) further includes a contact support dial (2101) disposed between the movable contact fixed end (2102) and the contact support connection end (2100), the contact support dial (2101) being rotatably coupled to the housing of the rotary electrical switch.
10. Rotary electric switch, characterized in that it comprises a rotary electric switch contact system according to any one of claims 1-9;
also included is a rotary control mechanism (1) and at least one switch module (2), each switch module (2) including a switch module housing (20) and a module contact system disposed within the switch module housing (20).
11. The rotary electric switch of claim 10, wherein: arc extinguishing chambers (23) are arranged on two sides of a fixed contact part (2840) of the fixed contact connecting piece (284).
12. The rotary electric switch of claim 11, wherein:
the fixed contact piece (283) of the fixed contact assembly (28) is fixedly arranged in the switch module shell (20), and two ends of the contact piece main board (2830) of the fixed contact piece (283) are respectively connected with arc extinguishing chambers (23) at two sides of the fixed contact part (2840).
13. Rotary electric switch according to claim 11 or 12, characterized in that: the inlet end of explosion chamber (23) is arc structure, cooperates with moving contact subassembly (21), and explosion chamber (23) are including two bars piece fixed plate (230) that set up relatively and multi-disc interval are located arc extinguishing bars piece (231) between two bars piece fixed plate (230), and arc extinguishing bars piece (231) are iron arc extinguishing bars piece.
14. The rotary electric switch of claim 10, wherein: the switch module comprises a switch module shell (20), wherein a movable contact assembly mounting groove (201) is formed in the middle of the switch module shell (20), two wiring terminal mounting grooves (204) are formed in two ends of the switch module shell respectively, a fixed contact connecting piece mounting groove (209) is formed between the two wiring terminal mounting grooves (204) at the same end of the switch module shell (20), a fixed contact bridge (280) of a fixed contact assembly (28) is arranged between the fixed contact connecting piece mounting groove (209) and the movable contact assembly mounting groove (201), a plurality of arc extinguishing chamber mounting grooves (203) are circumferentially formed in the outer side of the movable contact assembly mounting groove (201), one end of each arc extinguishing chamber mounting groove (203) is communicated with the movable contact assembly mounting groove (201), and the other end of each arc extinguishing chamber mounting groove (203) is communicated with the outside of a rotary electric switch through an air outlet (205) formed in the upper side of the switch module shell (20).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810232471.3A CN108666164B (en) | 2018-03-20 | 2018-03-20 | Rotary electrical switch contact system and rotary electrical switch |
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| CN201810232471.3A CN108666164B (en) | 2018-03-20 | 2018-03-20 | Rotary electrical switch contact system and rotary electrical switch |
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| CN108666164A CN108666164A (en) | 2018-10-16 |
| CN108666164B true CN108666164B (en) | 2023-12-26 |
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| CN201810232471.3A Active CN108666164B (en) | 2018-03-20 | 2018-03-20 | Rotary electrical switch contact system and rotary electrical switch |
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| CN110459412B (en) * | 2019-07-23 | 2024-03-19 | 杭州之江开关股份有限公司 | Dual-power switching power supply electricity taking device and operation method thereof |
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