Contactor moving contact assembly and contactor

Abstract

The invention discloses a contactor moving contact assembly and a contactor. The contactor moving contact assembly comprises a mounting frame which comprises a magnetic conductive top plate and an insulating base; the movable terminal is movably arranged in the mounting frame; the spring is arranged in the mounting frame and supports the moving terminal on the insulating base of the mounting frame in a floating manner; the insulating top seat is fixed on the moving terminal or the magnetic conductive top plate; the auxiliary moving contact is fixed on the insulating top seat; and the driving shaft is connected with the insulating base of the mounting frame and is used for driving the mounting frame to move. The insulating top seat comprises a first insulating part and a second insulating part which are used for electrically isolating the auxiliary moving contact from the magnetic conductive top plate, the comparative tracking index of the first insulating part is lower than the highest working voltage of the contactor, and the comparative tracking index of the second insulating part is higher than the highest working voltage of the contactor. Therefore, higher electrical insulation performance can be achieved under the condition that the size is not increased, and the low-voltage auxiliary moving contact can be electrically isolated from the high-voltage conductive part safely and reliably.

Description

Technical Field

[0001] The present invention relates to a moving contact assembly of a contactor and a contactor including the moving contact assembly of the contactor. Background Art

[0002] In new energy fields such as photovoltaic and energy storage, higher working voltage requirements are put forward for contactors used therein. Starting from the generally popular 1000V, it has been increased to 1500V, and now it is further considered to be upgraded to 2000V or even higher voltages. In the existing technology, in the part of the auxiliary moving contact assembly, generally only ordinary insulating materials are used to electrically isolate the low-voltage auxiliary moving contact from high-voltage components (for example, a magnetic conductive top plate, a moving terminal, and a spring). Thus, with the increase of the working voltage, according to the safety regulations, there are higher requirements for the insulation distance, and it is necessary to increase the internal insulator or design a more complex insulator to meet the requirements. In this way, the overall volume, manufacturing difficulty, and even cost of the product will increase significantly. Summary of the Invention

[0003] The purpose of the present invention aims to solve at least one of the above problems and defects existing in the prior art.

[0004] According to one aspect of the present invention, there is provided a moving contact assembly of a contactor. The moving contact assembly of the contactor includes: a mounting frame including a magnetic conductive top plate and an insulating base; a moving terminal movably disposed in the mounting frame for electrically contacting a static terminal of the contactor; a spring disposed in the mounting frame and floatingly supporting the moving terminal on the insulating base of the mounting frame; an insulating top seat fixed to the moving terminal or the magnetic conductive top plate of the mounting frame; an auxiliary moving contact fixed to the insulating top seat for electrically contacting an auxiliary static contact of the contactor; and a driving shaft connected to the insulating base of the mounting frame for driving the mounting frame to move along the axial direction of the driving shaft. The insulating top seat includes a first insulating member and a second insulating member for electrically isolating the auxiliary moving contact from the magnetic conductive top plate, the comparative tracking index of the first insulating member is lower than the highest working voltage allowed by the contactor, and the comparative tracking index of the second insulating member is higher than the highest working voltage allowed by the contactor.

[0005] According to an exemplary embodiment of the present invention, the insulating top seat is fixed to the magnetic conductive top plate of the mounting frame, and the portion of the auxiliary moving contact closest to the magnetic conductive top plate is received in the second insulating member to electrically isolate the portion of the auxiliary moving contact closest to the magnetic conductive top plate from the magnetic conductive top plate through the second insulating member.

[0006] According to another exemplary embodiment of the present invention, the first insulating member has a first accommodation chamber, and the auxiliary moving contact and the second insulating member are accommodated in the first accommodation chamber of the first insulating member.

[0007] According to another exemplary embodiment of the present invention, the first insulating member includes: a pair of side plates opposite to each other in a first direction perpendicular to the axial direction of the drive shaft; and a bottom plate connected between the bottoms of the pair of side plates, and the first accommodation chamber is defined between the pair of side plates and the bottom plate, and the auxiliary moving contact and the second insulating member are fixed to the bottom plate.

[0008] According to another exemplary embodiment of the present invention, the auxiliary moving contact includes a fixing portion fixed to the bottom plate and an elastic portion suspended in the first accommodation chamber; the second insulating member has a second accommodation chamber, and the fixing portion of the auxiliary moving contact is closest to the magnetic conductive top plate and is accommodated in the second accommodation chamber.

[0009] According to another exemplary embodiment of the present invention, the first insulating member has a first port and a second port opposite to each other in a second direction perpendicular to the axial direction and the first direction, the second insulating member is positioned in the second port of the first insulating member and closes the second port, and the fixing portion of the auxiliary moving contact is positioned in the second accommodation chamber of the second insulating member.

[0010] According to another exemplary embodiment of the present invention, the second insulating member includes: a pair of side walls opposite to each other in the first direction; a bottom wall connected between the bottoms of the pair of side walls; and an end wall connected between one ends of the pair of side walls, and the second accommodation chamber is defined between the pair of side walls, the bottom wall and the end wall.

[0011] According to another exemplary embodiment of the present invention, a raised positioning post is formed on the inner side of the bottom plate of the first insulating member, and positioning holes cooperating with the positioning post are respectively formed on the bottom wall of the second insulating member and the fixing portion of the auxiliary moving contact.

[0012] According to another exemplary embodiment of the present invention, the first insulating member has a pair of mounting portions respectively connected to the outer sides of the bottoms of the pair of side plates, and mounting holes are formed on the mounting portions; mounting posts corresponding to the mounting holes are formed on the top surface of the magnetic conductive top plate, and the mounting posts are inserted into the mounting holes to mount the first insulating member onto the magnetic conductive top plate.

[0013] According to another exemplary embodiment of the present invention, the mounting frame further includes: a pair of conductive side plates fixed to the insulating base, and the magnetic conductive top plate is fixed between the tops of the pair of conductive side plates.

[0014] According to another exemplary embodiment of the present invention, mounting slots are formed at the top of the conductive side plates, and both ends of the magnetic conductive top plate are respectively inserted into the mounting slots of the pair of conductive side plates.

[0015] According to another exemplary embodiment of the present invention, the insulating base includes: a pair of insulating side walls; and an insulating bottom wall connected between the bottoms of the pair of insulating side walls. The lower ends of the pair of conductive side plates are respectively fixed to the pair of insulating side walls of the insulating base, and the upper end of the driving shaft is fixed to the insulating bottom wall of the insulating base.

[0016] According to another exemplary embodiment of the present invention, the insulating base is directly injection molded on the lower ends of the pair of conductive side plates and the upper end of the driving shaft through an insert injection molding process, so that the three become an integral part.

[0017] According to another exemplary embodiment of the present invention, the contact moving contact assembly further includes: a floating seat disposed in the mounting frame and assembled with the moving terminal to float together with the moving terminal. The spring is compressed between the floating seat and the insulating base to floatingly support the floating seat and the moving terminal on the insulating base.

[0018] According to another exemplary embodiment of the present invention, mounting notches are respectively formed on both sides of the moving terminal, and mounting flanges are respectively formed on both sides of the floating seat. The mounting flanges are embedded into the mounting notches.

[0019] According to another exemplary embodiment of the present invention, a protruding first positioning post is formed on the bottom surface of the floating seat, and a protruding second positioning post is formed on the inner side of the insulating bottom wall of the insulating base; the first positioning post and the second positioning post are axially opposite and are respectively inserted into the upper end and the lower end of the spring to position the spring.

[0020] According to another exemplary embodiment of the present invention, the moving terminal is adapted to move between a closed position in electrical contact with the static terminal and an open position in electrical separation from the static terminal under the drive of the driving shaft; the auxiliary moving contact is adapted to move between a closed position in electrical contact with the auxiliary static contact and an open position in electrical separation from the auxiliary static contact under the drive of the driving shaft.

[0021] According to another exemplary embodiment of the present invention, when the moving terminal is moved to the closed position in electrical contact with the static terminal, the auxiliary moving contact is moved to the closed position in electrical contact with the auxiliary static contact; when the moving terminal is moved to the open position in electrical separation from the static terminal, the auxiliary moving contact is moved to the open position in electrical separation from the auxiliary static contact.

[0022] According to another exemplary embodiment of the present invention, the moving contact assembly of the contactor further includes: a bottom insulating member disposed on the bottom of the insulating base and surrounding the drive shaft, the comparative tracking index of the insulating base being lower than the maximum operating voltage allowed for the contactor, and the comparative tracking index of the bottom insulating member being higher than the maximum operating voltage allowed for the contactor.

[0023] According to another exemplary embodiment of the present invention, a raised insulating post is formed on the bottom surface of the insulating bottom wall of the insulating base, and the upper end of the drive shaft is joined into the insulating bottom wall and the insulating post of the insulating base; an annular groove is formed on the insulating post of the insulating base, and the bottom insulating member is annular and joined into the annular groove on the insulating post.

[0024] According to another exemplary embodiment of the present invention, the insulating base is directly injection-molded on the upper end of the drive shaft by an insert injection molding process, and the bottom insulating member is directly injection-molded on the bottom of the insulating base by a secondary insert injection molding process, so that the three become an integral part.

[0025] According to another aspect of the present invention, a contactor is provided. The contactor includes: a pair of static terminals; a coil for generating an electromagnetic field; and a moving contact assembly of the contactor. The drive shaft is adapted to drive the moving terminal from an open position where it is electrically separated from the static terminal to a closed position where it is in electrical contact with the static terminal under the action of the electromagnetic force applied by the electromagnetic field.

[0026] In the foregoing various exemplary embodiments according to the present invention, a special second insulating member is added to the ordinary first insulating member. The comparative tracking index of the second insulating member is higher than the maximum operating voltage allowed for the contactor. Therefore, higher electrical insulation performance can be achieved without increasing the size of the insulating top seat, and the low-voltage auxiliary moving contact can be safely and reliably electrically isolated from the high-voltage conductive component.

[0027] In the foregoing some exemplary embodiments according to the present invention, a special bottom insulating member is added to the ordinary insulating base. The comparative tracking index of the bottom insulating member is higher than the maximum operating voltage allowed for the contactor. Therefore, higher electrical insulation performance can be achieved without increasing the size of the insulating base, and the low-voltage drive shaft can be safely and reliably electrically isolated from the high-voltage conductive component.

[0028] Other objects and advantages of the present invention will be apparent from the following description with reference to the accompanying drawings, and will help to provide a comprehensive understanding of the present invention. Description of the Drawings

[0029] Figure 1 A perspective view of a moving terminal assembly of a contactor according to an exemplary embodiment of the present invention;

[0030] Figure 2 An axial cross-sectional view of a moving terminal assembly of a contactor according to an exemplary embodiment of the present invention;

[0031] Figure 3 A perspective view of a moving terminal assembly of a contactor according to an exemplary embodiment of the present invention from another angle;

[0032] Figure 4 An exploded view of a moving terminal assembly of a contactor according to an exemplary embodiment of the present invention;

[0033] Figure 5 An exploded cross-sectional view of a moving terminal assembly of a contactor according to an exemplary embodiment of the present invention;

[0034] Figure 6 An exploded view of an insulating base and a bottom insulating member of a moving terminal assembly of a contactor according to an exemplary embodiment of the present invention. Detailed Description of the Invention

[0035] The technical solution of the present invention will be further specifically described below through embodiments in conjunction with the accompanying drawings. In the specification, the same or similar reference numerals indicate the same or similar components. The following description of the embodiments of the present invention with reference to the accompanying drawings is intended to explain the general inventive concept of the present invention and should not be construed as a limitation of the present invention.

[0036] In addition, in the following detailed description, for the purpose of explanation, many specific details are set forth to provide a thorough understanding of the embodiments disclosed herein. However, it is obvious that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in diagrammatic form to simplify the drawings.

[0037] According to a general technical concept of the present invention, a moving contact assembly of a contactor is provided. The moving contact assembly of the contactor includes: a mounting frame including a magnetically conductive top plate and an insulating base; a moving terminal movably disposed in the mounting frame for electrically contacting a static terminal of the contactor; a spring disposed in the mounting frame and floatingly supporting the moving terminal on the insulating base of the mounting frame; an insulating top seat fixed to the moving terminal or the magnetically conductive top plate of the mounting frame; an auxiliary moving contact fixed to the insulating top seat for electrically contacting an auxiliary static contact of the contactor; and a drive shaft connected to the insulating base of the mounting frame for driving the mounting frame to move axially along the drive shaft. The insulating top seat includes a first insulating member and a second insulating member for electrically isolating the auxiliary moving contact from the magnetically conductive top plate, a comparative tracking index of the first insulating member is lower than the maximum operating voltage allowed by the contactor, and a comparative tracking index of the second insulating member is higher than the maximum operating voltage allowed by the contactor.

[0038] According to another general technical concept of the present invention, a moving contact assembly of a contactor is provided. The moving contact assembly of the contactor includes: a mounting frame including an insulating base; a moving terminal movably disposed in the mounting frame for electrically contacting a static terminal of the contactor; a spring disposed in the mounting frame and floatingly supporting the moving terminal on the insulating base of the mounting frame; a drive shaft connected to the insulating base of the mounting frame for driving the mounting frame to move axially along the drive shaft; and a bottom insulating member disposed on the bottom of the insulating base and surrounding the drive shaft. The insulating base and the bottom insulating member are used to electrically isolate the drive shaft from the spring, a comparative tracking index of the insulating base is lower than the maximum operating voltage allowed by the contactor, and a comparative tracking index of the bottom insulating member is higher than the maximum operating voltage allowed by the contactor.

[0039] According to another general technical concept of the present invention, a contactor is provided. The contactor includes: a pair of static terminals; a coil for generating an electromagnetic field; and a moving contact assembly of the contactor. The drive shaft is adapted to drive the moving terminal to move from an open position where it is electrically separated from the static terminal to a closed position where it is electrically in contact with the static terminal under the action of the electromagnetic force applied by the electromagnetic field.

[0040] Figure 1 A perspective schematic view of a moving contact assembly of a contactor according to an exemplary embodiment of the present invention as viewed from one angle; Figure 2 An axial sectional view of a moving contact assembly of a contactor according to an exemplary embodiment of the present invention; Figure 3 A perspective schematic view of a moving contact assembly of a contactor according to an exemplary embodiment of the present invention as viewed from another angle; Figure 4Shows an exploded schematic view of a moving terminal assembly of a contactor according to an exemplary embodiment of the present invention; Figure 5 Shows an exploded cross-sectional view of a moving terminal assembly of a contactor according to an exemplary embodiment of the present invention; Figure 6 Shows an exploded schematic view of an insulating base 12 and a bottom insulating member 8 of a moving terminal assembly of a contactor according to an exemplary embodiment of the present invention.

[0041] As Figures 1 to 6 Shown, in an exemplary embodiment of the present invention, a moving contact assembly of a contactor is disclosed. The moving contact assembly of the contactor includes: a mounting frame 1, an insulating top seat 2, an auxiliary moving contact 3, a moving terminal 4, a drive shaft 5, and a spring 6. The mounting frame 1 includes a magnetically conductive top plate 11 and an insulating base 12. The moving terminal 4 is movably disposed in the mounting frame 1 for making electrical contact with a static terminal (not shown) of the contactor. The spring 6 is disposed in the mounting frame 1 and floatingly supports the moving terminal  4 on the insulating base 12 of the mounting frame 1. The insulating top seat 2 is fixed to the moving terminal 4 or the magnetically conductive top plate 11 of the mounting frame 1. The auxiliary moving contact 3 is fixed to the insulating top seat 2 for making electrical contact with an auxiliary static contact (not shown) of the contactor. The drive shaft 5 is connected to the insulating base 12 of the mounting frame 1 for driving the mounting frame 1 to move along the axial direction Z of the drive shaft 5.

[0042] As Figures 1 to 6 Shown, in the illustrated embodiment, the insulating top seat 2 is fixed to the magnetically conductive top plate 11 of the mounting frame 1. The insulating top seat 2 includes a first insulating member 21 and a second insulating member 22 for electrically isolating the low-voltage auxiliary moving contact 3 from the high-voltage magnetically conductive top plate 11. The comparative tracking index of the first insulating member 21 is lower than the maximum operating voltage allowed by the contactor, and the comparative tracking index of the second insulating member 22 is higher than the maximum operating voltage allowed by the contactor.

[0043] As Figures 1 to 6 Shown, in the illustrated embodiment, a special second insulating member 22 is added to the ordinary first insulating member 21. The comparative tracking index of the second insulating member 22 is higher than the maximum operating voltage allowed by the contactor. Therefore, higher electrical insulation performance can be achieved without increasing the size of the insulating top seat 2, and the low-voltage auxiliary moving contact 3 can be electrically isolated from the high-voltage conductive component safely and reliably.

[0044] As Figures 1 to 6 Shown, in the illustrated embodiment, the portion of the auxiliary moving contact 3 closest to the magnetically conductive top plate 11 is received in the second insulating member 22 to electrically isolate the portion of the auxiliary moving contact 3 closest to the magnetically conductive top plate 11 from the magnetically conductive top plate 11 through the second insulating member 22.

[0045] As Figures 1 to 6As shown, in the illustrated embodiment, the first insulating member 21 has a first receiving chamber 210, and the auxiliary moving contact 3 and the second insulating member 22 are received in the first receiving chamber 210 of the first insulating member 21.

[0046] As Figures 1 to 6 shown, in the illustrated embodiment, the first insulating member 21 includes: a pair of side plates 211 and a bottom plate 212. The pair of side plates 211 face each other in a first direction X perpendicular to the axial direction Z of the drive shaft 5. The bottom plate 212 is connected between the bottoms of the pair of side plates 211. The first receiving chamber 210 is defined between the pair of side plates 211 and the bottom plate 212, and the auxiliary moving contact 3 and the second insulating member 22 are fixed to the bottom plate 212.

[0047] As Figures 1 to 6 shown, in the illustrated embodiment, the auxiliary moving contact 3 includes a fixing portion 3a fixed to the bottom plate 212 and an elastic portion 3b suspended in the first receiving chamber 210. The second insulating member 22 has a second receiving chamber 220, and the fixing portion 3a of the auxiliary moving contact 3 is closest to the magnetic conductive top plate 11 and is received in the second receiving chamber 220.

[0048] As Figures 1 to 6 shown, in the illustrated embodiment, the first insulating member 21 has a first port and a second port 202 facing each other in a second direction Y perpendicular to the axial direction Z and the first direction X. The second insulating member 22 is positioned in the second port 202 of the first insulating member 21 and closes the second port 202, and the fixing portion 3a of the auxiliary moving contact 3 is positioned in the second receiving chamber 220 of the second insulating member 22.

[0049] As Figures 1 to 6 shown, in the illustrated embodiment, the second insulating member 22 includes: a pair of side walls 221, a bottom wall 222, and an end wall 223. The pair of side walls 221 face each other in the first direction X. The bottom wall 222 is connected between the bottoms of the pair of side walls 221. The end wall 223 is connected between one ends of the pair of side walls 221. The second receiving chamber 220 is defined among the pair of side walls 221, the bottom wall 222, and the end wall 223.

[0050] As Figures 1 to 6 shown, in the illustrated embodiment, a raised positioning post 21a is formed on the inner side of the bottom plate 212 of the first insulating member 21, and positioning holes 22a cooperating with the positioning post 21a are respectively formed on the bottom wall 222 of the second insulating member 22 and the fixing portion 3a of the auxiliary moving contact 3.

[0051] As Figures 1 to 6As shown, in the illustrated embodiment, the first insulating member 21 has a pair of mounting portions 213 respectively connected to the outer sides of the bottoms of a pair of side plates 211, and mounting holes 21b are formed in the mounting portions 213. Mounting posts 11b corresponding to the mounting holes 21b are formed on the top surface of the magnetic conductive top plate 11, and the mounting posts 11b are inserted into the mounting holes 21b to mount the first insulating member 21 onto the magnetic conductive top plate 11.

[0052] As Figures 1 to 6 shown, in the illustrated embodiment, the mounting frame 1 further includes a pair of conductive side plates 13, and the pair of conductive side plates 13 are fixed to the insulating base 12. The magnetic conductive top plate 11 is fixed between the tops of the pair of conductive side plates 13.

[0053] As Figures 1 to 6 shown, in the illustrated embodiment, mounting slot holes 13a are formed at the tops of the conductive side plates 13, and both ends of the magnetic conductive top plate 11 are respectively inserted into the mounting slot holes 13a of the pair of conductive side plates 13.

[0054] As Figures 1 to 6 shown, in the illustrated embodiment, the insulating base 12 includes: a pair of insulating side walls 121 and an insulating bottom wall 122. The insulating bottom wall 122 is connected between the bottoms of the pair of insulating side walls 121. The lower ends of the pair of conductive side plates 13 are respectively fixed to the pair of insulating side walls 121 of the insulating base 12, and the upper end of the driving shaft 5 is fixed to the insulating bottom wall 122 of the insulating base 12.

[0055] As Figures 1 to 6 shown, in the illustrated embodiment, the insulating base 12 is directly injection molded onto the lower ends of the pair of conductive side plates 13 and the upper end of the driving shaft 5 through an insert injection molding process, so that the three become an integral part.

[0056] As Figures 1 to 6 shown, in the illustrated embodiment, the contact moving contact assembly further includes a floating seat 7. The floating seat 7 is disposed in the mounting frame 1 and assembled with the moving terminal 4 to float together with the moving terminal 4. A spring 6 is compressed between the floating seat 7 and the insulating base 12 to floatingly support the floating seat 7 and the moving terminal 4 on the insulating base 12.

[0057] As Figures 1 to 6 shown, in the illustrated embodiment, mounting notches 4a are respectively formed on both sides of the moving terminal 4, and mounting flanges 7a are respectively formed on both sides of the floating seat 7, and the mounting flanges 7a are embedded into the mounting notches 4a.

[0058] As Figures 1 to 6As shown, in the illustrated embodiment, a protruding first positioning post 7b is formed on the bottom surface of the floating seat 7, and a protruding second positioning post 12b is formed on the inner side of the insulating bottom wall 122 of the insulating base 12. The first positioning post 7b and the second positioning post 12b are axially opposite and are respectively inserted into the upper end and the lower end of the spring 6 to position the spring 6.

[0059] As Figures 1 to 6 shown, in the illustrated embodiment, the moving terminal 4 is adapted to move between a closed position in electrical contact with the stationary terminal and an open position in electrical separation from the stationary terminal under the drive of the drive shaft 5. The auxiliary moving contact 3 is adapted to move between a closed position in electrical contact with the auxiliary stationary contact and an open position in electrical separation from the auxiliary stationary contact under the drive of the drive shaft 5.

[0060] As Figures 1 to 6 shown, in the illustrated embodiment, when the moving terminal 4 is moved to the closed position in electrical contact with the stationary terminal, the auxiliary moving contact 3 is moved to the closed position in electrical contact with the auxiliary stationary contact. When the moving terminal 4 is moved to the open position in electrical separation from the stationary terminal, the auxiliary moving contact 3 is moved to the open position in electrical separation from the auxiliary stationary contact.

[0061] As Figures 1 to 6 shown, in the illustrated embodiment, the contactor moving contact assembly further includes a bottom insulating member 8, and the bottom insulating member 8 is disposed on the bottom of the insulating base 12 and surrounds the drive shaft 5. The comparative tracking index of the insulating base 12 is lower than the maximum operating voltage allowed by the contactor, and the comparative tracking index of the bottom insulating member 8 is higher than the maximum operating voltage allowed by the contactor.

[0062] As Figures 1 to 6 shown, in the illustrated embodiment, a protruding insulating post 123 is formed on the bottom surface of the insulating bottom wall 122 of the insulating base 12, and the upper end of the drive shaft 5 is joined to the insulating bottom wall 122 and the insulating post 123 of the insulating base 12. An annular groove 12a is formed on the insulating post 123 of the insulating base 12, and the bottom insulating member 8 is annular and is joined to the annular groove 12a on the insulating post 123.

[0063] As Figures 1 to 6 shown, in the illustrated embodiment, the insulating base 12 is directly injection-molded on the upper end of the drive shaft 5 by an insert injection molding process, and the bottom insulating member 8 is directly injection-molded on the bottom of the insulating base 12 by a secondary insert injection molding process, so that the three become an integral part.

[0064] As Figures 1 to 6As shown, in another exemplary embodiment of the present invention, a contactor is also disclosed. The contactor includes: a pair of static terminals, a coil, and a contactor moving contact assembly. The drive shaft 5 is adapted to drive the aforementioned moving terminal 4 from an open position where it is electrically separated from the static terminal to a closed position where it is in electrical contact with the static terminal under the action of the electromagnetic force applied by the electromagnetic field.

[0065] As Figures 1 to 6 shown, in another exemplary embodiment of the present invention, a contactor moving contact assembly is also disclosed. The contactor moving contact assembly includes: a mounting frame 1, a moving terminal 4, a drive shaft 5, a spring 6, and a bottom insulating member 8. The mounting frame 1 includes an insulating base 12. The moving terminal 4 is movably disposed in the mounting frame 1 for making electrical contact with the static terminal (not shown) of the contactor. The spring 6 is disposed in the mounting frame 1 and floatingly supports the moving terminal 4 on the insulating base 12 of the mounting frame 1. The drive shaft 5 is connected to the insulating base 12 of the mounting frame 1 for driving the mounting frame 1 to move along the axial direction Z of the drive shaft 5. The bottom insulating member 8 is disposed on the bottom of the insulating base 12 and surrounds the drive shaft 5.

[0066] As Figures 1 to 6 shown, in the illustrated embodiment, the insulating base 12 and the bottom insulating member 8 are used to electrically isolate the low-voltage drive shaft 5 from the high-voltage conductive components (e.g., the moving terminal 4, the conductive side plate 13, and the spring 6). The comparative tracking index of the insulating base 12 is lower than the maximum operating voltage allowed for the contactor, and the comparative tracking index of the bottom insulating member 8 is higher than the maximum operating voltage allowed for the contactor.

[0067] As Figures 1 to 6 shown, in the illustrated embodiment, a special bottom insulating member 8 is added to the ordinary insulating base 12. The comparative tracking index of the bottom insulating member 8 is higher than the maximum operating voltage allowed for the contactor. Therefore, higher electrical insulation performance can be achieved without increasing the size of the insulating base, and the low-voltage drive shaft 5 can be safely and reliably electrically isolated from the high-voltage conductive components.

[0068] As Figures 1 to 6 shown, in the illustrated embodiment, a raised insulating column 123 is formed on the bottom surface of the insulating base 12, and the upper end of the drive shaft 5 is engaged into the insulating column 123 of the insulating base 12. An annular groove 12a is formed on the insulating column 123 of the insulating base 12, and the bottom insulating member 8 is annular and engaged into the annular groove 12a on the insulating column 123.

[0069] As Figures 1 to 6 shown, in the illustrated embodiment, the insulating base 12 is directly injection molded on the upper end of the drive shaft 5 through an insert injection molding process, and the bottom insulating member 8 is directly injection molded on the bottom of the insulating base 12 through a secondary insert injection molding process, so that the three become an integral part.

[0070] As shown Figures 1 to 6 in the illustrated embodiment, the mounting frame 1 further includes: a pair of conductive side plates 13 and a magnetic conductive top plate 11. The pair of conductive side plates 13 are fixed to the insulating base 12. The magnetic conductive top plate 11 is fixed between the tops of the pair of conductive side plates 13. Mounting slots 13a are formed at the tops of the conductive side plates 13, and the two ends of the magnetic conductive top plate 11 are respectively inserted into the mounting slots 13a of the pair of conductive side plates 13.

[0071] As shown Figures 1 to 6 in the illustrated embodiment, the insulating base 12 includes: a pair of insulating side walls 121 and an insulating bottom wall 122. The insulating bottom wall 122 is connected between the bottoms of the pair of insulating side walls 121. The lower ends of the pair of conductive side plates 13 are respectively fixed into the pair of insulating side walls 121 of the insulating base 12, and the upper end of the drive shaft 5 is fixed into the insulating bottom wall 122 of the insulating base 12.

[0072] As shown Figures 1 to 6 in the illustrated embodiment, the insulating base 12 is directly injection molded onto the lower ends of the pair of conductive side plates 13 and the upper end of the drive shaft 5 through an insert injection molding process, and the bottom insulating member 8 is directly injection molded onto the bottom of the insulating base 12 through a secondary insert injection molding process, so that the four become an integral part.

[0073] As shown Figures 1 to 6 in the illustrated embodiment, the contactor moving contact assembly further includes a floating seat 7. The floating seat 7 is arranged in the mounting frame 1 and assembled with the moving terminal 4 to float together with the moving terminal 4. A spring 6 is compressed between the floating seat 7 and the insulating base 12 to floatingly support the floating seat 7 and the moving terminal 4 on the insulating base 12.

[0074] As shown Figures 1 to 6 in the illustrated embodiment, mounting notches 4a are respectively formed on both sides of the moving terminal 4, and mounting flanges 7a are respectively formed on both sides of the floating seat 7. The mounting flanges 7a are embedded into the mounting notches 4a.

[0075] As shown Figures 1 to 6 in the illustrated embodiment, a protruding first positioning post 7b is formed on the bottom surface of the floating seat 7, and a protruding second positioning post 12b is formed on the inner side of the insulating bottom wall 122 of the insulating base 12. The first positioning post 7b and the second positioning post 12b are axially opposite and are respectively inserted into the upper end and the lower end of the spring 6 to position the spring 6.

[0076] As shown Figures 1 to 6As shown, in the illustrated embodiment, the moving contact assembly of the contactor further includes: an insulating top seat 2 and an auxiliary moving contact 3. The insulating top seat 2 is fixed to the magnetic conductive top plate 11 of the mounting frame 1. The auxiliary moving contact 3 is fixed to the insulating top seat 2 and is used for electrical contact with the auxiliary static contact (not shown) of the contactor. The insulating top seat 2 includes a first insulating member 21 and a second insulating member 22 for electrically isolating the auxiliary moving contact 3 from the magnetic conductive top plate 11. The comparative tracking index of the first insulating member 21 is lower than the maximum operating voltage allowed for the contactor, and the comparative tracking index of the second insulating member 22 is higher than the maximum operating voltage allowed for the contactor.

[0077] As Figures 1 to 6 shown, in the illustrated embodiment, the portion of the auxiliary moving contact 3 closest to the magnetic conductive top plate 11 is received in the second insulating member 22 to electrically isolate the portion of the auxiliary moving contact 3 closest to the magnetic conductive top plate 11 from the magnetic conductive top plate 11 through the second insulating member 22.

[0078] As Figures 1 to 6 shown, in the illustrated embodiment, the first insulating member 21 has a first receiving chamber 210, and the auxiliary moving contact 3 and the second insulating member 22 are received in the first receiving chamber 210 of the first insulating member 21.

[0079] As Figures 1 to 6 shown, in the illustrated embodiment, the first insulating member 21 includes: a pair of side plates 211 and a bottom plate 212. The pair of side plates 211 are opposite to each other in a first direction X perpendicular to the axial direction Z of the drive shaft 5. A bottom plate 212 is connected between the bottoms of the pair of side plates 211. The first receiving chamber 210 is defined between the pair of side plates 211 and the bottom plate 212, and the auxiliary moving contact 3 and the second insulating member 22 are fixed to the bottom plate 212.

[0080] As Figures 1 to 6 shown, in the illustrated embodiment, the auxiliary moving contact 3 includes a fixing portion 3a fixed to the bottom plate 212 and an elastic portion 3b suspended in the first receiving chamber 210. The second insulating member 22 has a second receiving chamber 220, and the fixing portion 3a of the auxiliary moving contact 3 closest to the magnetic conductive top plate 11 is received in the second receiving chamber 220.

[0081] As Figures 1 to 6 shown, in the illustrated embodiment, the first insulating member 21 has a first port and a second port 202 opposite to each other in a second direction Y perpendicular to the axial direction Z and the first direction X. The second insulating member 22 is positioned in the second port 202 of the first insulating member 21 and closes the second port 202, and the fixing portion 3a of the auxiliary moving contact 3 is positioned in the second receiving chamber 220 of the second insulating member 22.

[0082] As Figures 1 to 6As shown, in the illustrated embodiment, the second insulating member 22 includes: a pair of side walls 221, a bottom wall 222, and an end wall 223. The pair of side walls 221 are opposite to each other in the first direction X. The bottom wall 222 is connected between the bottoms of the pair of side walls 221. The end wall 223 is connected between one ends of the pair of side walls 221. A second accommodation chamber 220 is defined among the pair of side walls 221, the bottom wall 222, and the end wall 223.

[0083] As Figures 1 to 6 shown, in the illustrated embodiment, a raised positioning post 21a is formed on the inner side of the bottom plate 212 of the first insulating member 21, and positioning holes 22a that cooperate with the positioning post 21a are respectively formed on the bottom wall 222 of the second insulating member 22 and the fixing portion 3a of the auxiliary moving contact 3.

[0084] As Figures 1 to 6 shown, in the illustrated embodiment, the first insulating member 21 has a pair of mounting portions 213 respectively connected to the outer sides of the bottoms of the pair of side plates 211, and mounting holes 21b are formed on the mounting portions 213. Mounting posts 11b corresponding to the mounting holes 21b are formed on the top surface of the magnetic conductive top plate 11, and the mounting posts 11b are inserted into the mounting holes 21b to mount the first insulating member 21 onto the magnetic conductive top plate 11.

[0085] As Figures 1 to 6 shown, in the illustrated embodiment, the moving terminal 4 is adapted to move between a closed position in electrical contact with the static terminal and an open position in electrical separation from the static terminal under the drive of the drive shaft 5. The auxiliary moving contact 3 is adapted to move between a closed position in electrical contact with the auxiliary static contact and an open position in electrical separation from the auxiliary static contact under the drive of the drive shaft 5.

[0086] As Figures 1 to 6 shown, in the illustrated embodiment, when the moving terminal 4 is moved to the closed position in electrical contact with the static terminal, the auxiliary moving contact 3 is moved to the closed position in electrical contact with the auxiliary static contact. When the moving terminal 4 is moved to the open position in electrical separation from the static terminal, the auxiliary moving contact 3 is moved to the open position in electrical separation from the auxiliary static contact.

[0087] As Figures 1 to 6 shown, in another exemplary embodiment of the present invention, a contactor is also disclosed. The contactor includes: a pair of static terminals, a coil, and the aforementioned contactor moving contact assembly. The coil is used to generate an electromagnetic field. The drive shaft 5 is adapted to drive the moving terminal 4 to move from the open position in electrical separation from the static terminal to the closed position in electrical contact with the static terminal under the action of the electromagnetic force exerted by the electromagnetic field.

[0088] Those skilled in the art can understand that the above-described embodiments are all exemplary, and those skilled in the art can make improvements to them. The structures described in various embodiments can be freely combined without conflicts in structure or principle, and these changes should reasonably fall within the protection scope of the present invention.

[0089] Although the present invention has been described in conjunction with the accompanying drawings, the embodiments disclosed in the drawings are intended to exemplarily illustrate the preferred embodiments of the present invention and should not be construed as a limitation on the present invention.

[0090] Although some embodiments of the general concept of the present invention have been shown and described, those of ordinary skill in the art will understand that changes can be made to these embodiments without departing from the principles and spirit of the general concept of the present invention. The scope of the present invention is defined by the claims and their equivalents.

[0091] It should be noted that the term "comprising" does not exclude other elements or steps, and the terms "a" or "an" do not exclude a plurality. Additionally, any element label in the claims should not be construed as limiting the scope of the present invention.

Claims

1. A moving contact component of a contactor, characterized in that, Comprising: An installation frame (1), including a magnetic conductive top plate (11) and an insulating base (12); A moving terminal (4), movably arranged in the installation frame (1) for making electrical contact with a static terminal of a contactor; A spring (6), arranged in the installation frame (1) and floatingly supporting the moving terminal (4) on the insulating base (12) of the installation frame (1); An insulating top seat (2), fixed to the moving terminal (4) or the magnetic conductive top plate (11) of the installation frame (1); An auxiliary moving contact (3), fixed to the insulating top seat (2) for making electrical contact with an auxiliary static contact of a contactor; And A drive shaft (5), connected to the insulating base (12) of the installation frame (1) for driving the installation frame (1) to move along the axial direction (Z) of the drive shaft (5), The insulating top seat (2) includes a first insulating member (21) and a second insulating member (22) for electrically isolating the auxiliary moving contact (3) from the magnetic conductive top plate (11), the comparative tracking index of the first insulating member (21) is lower than the maximum operating voltage allowed by the contactor, and the comparative tracking index of the second insulating member (22) is higher than the maximum operating voltage allowed by the contactor.

2. The moving contact assembly of a contactor according to claim 1, wherein: The insulating top seat (2) is fixed to the magnetic conductive top plate (11) of the installation frame (1), and the portion of the auxiliary moving contact (3) closest to the magnetic conductive top plate (11) is received in the second insulating member (22) to electrically isolate the portion of the auxiliary moving contact (3) closest to the magnetic conductive top plate (11) from the magnetic conductive top plate (11) through the second insulating member (22).

3. The moving contact assembly of a contactor according to claim 2, wherein: The first insulating member (21) has a first accommodation chamber (210), and the auxiliary moving contact (3) and the second insulating member (22) are received in the first accommodation chamber (210) of the first insulating member (21).

4. The moving contact assembly of a contactor according to claim 3, wherein: The first insulating member (21) includes: A pair of side plates (211), opposite to each other in a first direction (X) perpendicular to the axial direction (Z) of the drive shaft (5); and A bottom plate (212), connected between the bottoms of the pair of side plates (211), the first accommodation chamber (210) is defined between the pair of side plates (211) and the bottom plate (212), and the auxiliary moving contact (3) and the second insulating member (22) are fixed to the bottom plate (212).

5. The moving contact assembly of a contactor according to claim 4, wherein: The auxiliary moving contact (3) includes a fixing portion (3a) fixed to the bottom plate (212) and an elastic portion (3b) suspended in the first accommodation chamber (210); The second insulating member (22) has a second accommodation chamber (220), and the fixing portion (3a) of the auxiliary moving contact (3) is closest to the magnetic conductive top plate (11) and is accommodated in the second accommodation chamber (220).

6. The moving contact assembly of the contactor according to claim 5, characterized in that: The first insulating member (21) has a first port and a second port (202) opposite to each other in a second direction (Y) perpendicular to the axial direction (Z) and the first direction (X). The second insulating member (22) is positioned in the second port (202) of the first insulating member (21) and closes the second port (202), and the fixing portion (3a) of the auxiliary moving contact (3) is positioned in the second accommodation chamber (220) of the second insulating member (22).

7. The moving contact assembly of the contactor according to claim 5, characterized in that: The second insulating member (22) includes: a pair of side walls (221) opposite to each other in the first direction (X); a bottom wall (222) connected between the bottoms of the pair of side walls (221); and an end wall (223) connected between one ends of the pair of side walls (221), and the second accommodation chamber (220) is defined among the pair of side walls (221), the bottom wall (222) and the end wall (223).

8. The moving contact assembly of the contactor according to claim 7, characterized in that: A raised positioning post (21a) is formed on the inner side of the bottom plate (212) of the first insulating member (21), and positioning holes (22a) cooperating with the positioning post (21a) are respectively formed on the bottom wall (222) of the second insulating member (22) and the fixing portion (3a) of the auxiliary moving contact (3).

9. The moving contact assembly of the contactor according to claim 4, characterized in that: The first insulating member (21) has a pair of mounting portions (213) respectively connected to the outer sides of the bottoms of the pair of side plates (211), and mounting holes (21b) are formed on the mounting portions (213); Mounting posts (11b) corresponding to the mounting holes (21b) are formed on the top surface of the magnetic conductive top plate (11), and the mounting posts (11b) are inserted into the mounting holes (21b) to mount the first insulating member (21) onto the magnetic conductive top plate (11).

10. The moving contact assembly of the contactor according to claim 1, characterized in that: The mounting frame (1) further includes: a pair of conductive side plates (13) fixed to the insulating base (12), The magnetic conductive top plate (11) is fixed between the tops of the pair of conductive side plates (13).

11. The moving contact assembly of the contactor according to claim 10, characterized in that: Mounting slot holes (13a) are formed on the tops of the conductive side plates (13), and both ends of the magnetic conductive top plate (11) are respectively inserted into the mounting slot holes (13a) of the pair of conductive side plates (13).

12. The moving contact assembly of the contactor according to claim 10, characterized in that: The insulating base (12) includes: A pair of insulating side walls (121); and An insulating bottom wall (122), connected between the bottoms of the pair of insulating side walls (121), The lower ends of the pair of conductive side plates (13) are respectively fixed to a pair of insulating side walls (121) of the insulating base (12), and the upper end of the drive shaft (5) is fixed to the insulating bottom wall (122) of the insulating base (12).

13. The moving contact assembly of a contactor according to claim 10, characterized in that: The insulating base (12) is directly injection-molded on the lower ends of the pair of conductive side plates (13) and the upper end of the drive shaft (5) through an insert injection molding process, so that the three become an integral part.

14. The movable contact component of the contactor according to claim 12, characterized in that, Further comprising: A floating seat (7), arranged in the mounting frame (1) and assembled with the moving terminal (4) to float together with the moving terminal (4), The spring (6) is compressed between the floating seat (7) and the insulating base (12) to floatingly support the floating seat (7) and the moving terminal (4) on the insulating base (12).

15. The moving contact assembly of a contactor according to claim 14, characterized in that: Mounting notches (4a) are respectively formed on both sides of the moving terminal (4), and mounting flanges (7a) are respectively formed on both sides of the floating seat (7), and the mounting flanges (7a) are embedded into the mounting notches (4a).

16. The moving contact assembly of a contactor according to claim 14, characterized in that: A protruding first positioning post (7b) is formed on the bottom surface of the floating seat (7), and a protruding second positioning post (12b) is formed on the inner side of the insulating bottom wall (122) of the insulating base (12); The first positioning post (7b) and the second positioning post (12b) are axially opposite and are respectively inserted into the upper end and the lower end of the spring (6) to position the spring (6).

17. The moving contact assembly of a contactor according to claim 1, characterized in that: The moving terminal (4) is adapted to move between a closed position in electrical contact with the static terminal and an open position in electrical separation from the static terminal under the drive of the drive shaft (5); The auxiliary moving contact (3) is adapted to move between a closed position in electrical contact with the auxiliary static contact and an open position in electrical separation from the auxiliary static contact under the drive of the drive shaft (5).

18. The moving contact assembly of a contactor according to claim 17, characterized in that: When the moving terminal (4) is moved to the closed position in electrical contact with the static terminal, the auxiliary moving contact (3) is moved to the closed position in electrical contact with the auxiliary static contact; When the moving terminal (4) is moved to the open position in electrical separation from the static terminal, the auxiliary moving contact (3) is moved to the open position in electrical separation from the auxiliary static contact.

19. The moving contact component of the contactor according to any one of claims 1-18, characterized in that, Further comprising: A bottom insulating member (8), arranged on the bottom of the insulating base (12) and surrounding the drive shaft (5), The comparative tracking index of the insulating base (12) is lower than the maximum operating voltage allowed for the contactor, and the comparative tracking index of the bottom insulating member (8) is higher than the maximum operating voltage allowed for the contactor.

20. The moving contact assembly of the contactor according to claim 19, wherein: A raised insulating post (123) is formed on the bottom surface of the insulating bottom wall (122) of the insulating base (12), and the upper end of the drive shaft (5) is engaged into the insulating bottom wall (122) and the insulating post (123) of the insulating base (12); An annular groove (12a) is formed on the insulating post (123) of the insulating base (12), and the bottom insulating member (8) is annular and is engaged into the annular groove (12a) on the insulating post (123).

21. The moving contact assembly of the contactor according to claim 19, wherein: The insulating base (12) is directly injection-molded onto the upper end of the drive shaft (5) by an insert injection molding process, and the bottom insulating member (8) is directly injection-molded onto the bottom of the insulating base (12) by a secondary insert injection molding process, so that the three form an integral part.

22. A contactor, characterized in that, Comprising: A pair of static terminals; A coil for generating an electromagnetic field; And The moving contact assembly of the contactor according to any one of claims 1-21, The drive shaft (5) is adapted to drive the moving terminal (4) from an open position where it is electrically separated from the static terminal to a closed position where it is in electrical contact with the static terminal under the action of the electromagnetic force applied by the electromagnetic field.

Images