CN213366484U - High-voltage direct-current relay with auxiliary switch - Google Patents

Abstract

The utility model discloses a high voltage direct current relay with an auxiliary switch, which comprises two fixed contacts, a movable contact spring, a push rod, a coil component, a movable iron core and an auxiliary switch, wherein the movable iron core is arranged in the coil component in a way of moving up and down and is fixedly connected with the push rod; the movable contact spring is movably connected with the push rod and is matched with the two fixed contacts; the auxiliary switch comprises a rigid conductive piece and two flexible reeds, the conductive piece is fixedly connected with the movable iron core or the push rod, the two flexible reeds are positioned below the conductive piece, and the two flexible reeds are respectively provided with leading-out ends; along with the up-and-down movement of the movable iron core, the conductive piece is contacted with or separated from the two flexible reeds, and the two flexible reeds respectively generate elastic deformation in a contact state. The utility model discloses a two flexible reeds replace prior art's movable conductive piece to realize the overtravel, and the mode that sets up of two flexible reeds is comparatively nimble, conveniently selects the difficult cracked mode of atress to set up.

Description

High-voltage direct-current relay with auxiliary switch

Technical Field

The utility model relates to a high voltage direct current relay especially relates to a take auxiliary switch's high voltage direct current relay.

Background

A relay is an electronic control device having a control system (also called an input loop) and a controlled system (also called an output loop), which is commonly used in automatic control circuits, and which is actually an "automatic switch" that uses a small current to control a large current. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like.

The high-voltage direct-current relay is one of relays, and the high-voltage direct-current relay in the prior art generally comprises a relay shell, two fixed contact moving contact pieces, a push rod, a moving iron core, a coil assembly, a counter-force spring for resetting the moving iron core, a contact spring for improving contact pressure and the like. When the coil assembly works, the movable iron core acts, the movable contact piece is driven to move through the push rod, two ends of the movable contact piece are in contact with the two fixed contacts, and a load loop is communicated. In order to monitor the switching-on condition of the fixed contact, some high-voltage direct-current relays further comprise an auxiliary switch. At present, an auxiliary switch of a high-voltage direct-current relay in the prior art generally comprises a movable conductive piece driven by a movable iron core or a push rod and two static conductive pieces correspondingly matched with the movable conductive piece up and down, wherein the movable conductive piece and the static conductive pieces are both made of rigid materials, and the function of over-travel is not realized during contact, so that reliable contact cannot be ensured; some movable conductive parts can be elastically deformed, and the static conductive parts are made of rigid materials, so that the movable conductive parts can realize over-stroke during contact to ensure reliable contact, but the movable conductive parts are generally only horizontally arranged due to the fact that the movable conductive parts are required to be matched with the two static conductive parts at the same time, so that the elastic deformation capacity is limited, the arm of force of the movable conductive parts is short, the force is large, and the movable conductive parts are easily broken due to repeated stress.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the technical problem that prior art exists, a take auxiliary switch's high voltage direct current relay is provided.

The utility model provides a technical scheme that its technical problem adopted is: a high-voltage direct-current relay with an auxiliary switch comprises two fixed contacts, a movable contact spring, a push rod, a coil assembly, a movable iron core and the auxiliary switch, wherein the movable iron core is arranged in the coil assembly in a vertically movable mode and is fixedly connected with the push rod; the movable contact spring is movably connected with the push rod and is matched with the two fixed contacts; the method is characterized in that: the auxiliary switch comprises a rigid conductive piece and two flexible reeds, the conductive piece is fixedly connected with the movable iron core or the push rod, the two flexible reeds are positioned below the conductive piece, and the two flexible reeds are respectively provided with leading-out ends; along with the up-and-down movement of the movable iron core, the conductive piece is contacted with or separated from the two flexible reeds, and the two flexible reeds respectively generate elastic deformation in a contact state.

Furthermore, the two flexible reeds are respectively in an inclined state and/or a bending state.

Further, the horizontal projections of the two flexible reeds are parallel to each other.

Furthermore, one end of each of the two flexible reeds is a high end and is matched with the conductive piece, and the other end of each of the two flexible reeds is a low end and is provided with the leading-out end; the high end of one flexible spring and the low end of the other flexible spring are positioned on the same side, and the low end of one flexible spring and the high end of the other flexible spring are positioned on the same side.

Furthermore, the two flexible reeds respectively comprise an inclined section, an upper horizontal part positioned at the top end of the inclined section and a lower horizontal part positioned at the bottom end of the inclined section, the upper horizontal part forms the high end of the flexible reed, and the lower horizontal part forms the low end of the flexible reed.

Furthermore, the inclined section is provided with a long hole along the length direction.

Furthermore, convex bracts protruding upwards are respectively arranged at the parts of the two flexible reeds matched with the conductive piece.

Furthermore, the conductive piece is fixed on an insulating layer arranged on the side surface of the bottom of the push rod; the conductive piece is a rigid reed.

Furthermore, a metal shell is arranged in the coil assembly, and the movable iron core, the conductive piece and the two flexible reeds are positioned in the metal shell; the bottom of the metal shell is provided with two through holes which are in one-to-one correspondence with the leading-out ends of the two flexible reeds, the two through holes are respectively provided with an insulating ring, and the leading-out ends of the two flexible reeds respectively downwards penetrate through the insulating rings in the corresponding through holes.

Further, the metal shell comprises a metal shell with a top end and a bottom end both provided with openings and a metal sheet, the metal sheet is fixedly connected to the opening of the bottom end of the metal shell, and the two through holes are formed in the metal sheet.

Furthermore, the on-off state of the main switch formed by the two fixed contacts and the movable contact is opposite to the on-off state of the auxiliary switch.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. because auxiliary switch includes rigidity electrically conducts and two flexible reeds, makes the utility model discloses an auxiliary switch can not only realize the overstroke, still makes electrically conductive repeated atress difficult appearance fracture. Particularly, the utility model discloses a two flexible reeds replace prior art's movable conductive spare to realize the overtravel, and two flexible reeds are mutually independent, make the mode that sets up of two flexible reeds comparatively nimble, conveniently select the difficult cracked mode of atress to set up.

2. The flexible reeds are respectively inclined and/or bent, so that the two flexible reeds can be longer and softer in a limited space, the force arm is longer, the required force is small, the fatigue life of the flexible reeds is long, the flexible reeds are not easy to break, the generated bounce force is small, and the movable contact piece is not easy to rebound.

3. The horizontal projections of the two flexible reeds are parallel to each other, so that the lengths of the two flexible reeds can be maximized, and the two flexible reeds are softer. The high end of one flexible reed and the low end of the other flexible reed are positioned on the same side, and the low end of one flexible reed and the high end of the other flexible reed are positioned on the same side, so that when the two flexible reeds are in contact with the conductive piece, the stress of the conductive piece is relatively balanced, and the situations of deformation, damage and the like caused by long-term stress of the single piece can be avoided.

4. Two flexible reeds with electrically conductive complex position is equipped with the convex bud that makes progress respectively, makes the utility model discloses can utilize this protruding bud to further improve the contact reliability of flexible reed and electrically conductive.

5. The inclined section is provided with a long hole along the length direction, so that the flexibility of the flexible reed can be further improved.

6. The setting of insulating layer/insulating ring makes the utility model discloses can realize that forceful electric power (movable contact spring, two quiet contacts etc.) and light current (auxiliary switch) keep apart.

The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiment, and the high voltage dc relay with the auxiliary switch is provided.

Drawings

Fig. 1 is a schematic perspective view of a core part of the present invention;

fig. 2 is a front view of a core portion of the present invention;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is an exploded view of the auxiliary switch, the push rod and the magnetic conductive member of the present invention;

FIG. 5 is a schematic structural view of the flexible spring plate of the present invention;

fig. 6 is a sectional view (partially shown) of the present invention in a state where the main switch is closed;

fig. 7 is a sectional view (partially shown) of the present invention in a main switch off state.

Detailed Description

In an embodiment, please refer to fig. 1 and fig. 2, the high voltage direct current relay with the auxiliary switch of the present invention is a normally open type, and includes a relay housing (not shown), two stationary contacts 1, a moving contact 2, a push rod 7, a coil assembly (not shown), a moving iron core 10, a contact spring 50, a counter force spring 20 and an auxiliary switch, wherein the moving iron core 10 is disposed in the coil assembly in a manner of moving up and down and is fixedly connected with the push rod 7; the movable contact piece 2 is movably connected with the push rod 7 and is matched with the two fixed contacts 1. Specifically, a supporting piece 71 is arranged at the upper end of the pushing rod 7, the supporting piece 71 is connected with an inverted U-shaped piece 21, the movable contact piece 2 is positioned in the U-shaped piece 21, the upper end of the contact spring 50 is abutted against the movable contact piece 2, and the lower end of the contact spring 50 is abutted against the supporting piece 71. A yoke plate 40 is provided above the coil assembly. The coil assembly further comprises a stationary core 30 disposed above the movable core 10, wherein the stationary core 30 is fixed to the yoke plate 40 and is disposed outside the push rod 7 with a gap therebetween. The upper end of the reaction spring 20 is abutted against the static iron core 30, and the lower end of the reaction spring 20 is abutted against the movable iron core 10. The auxiliary switch comprises a rigid conductive piece and two flexible reeds 5, the conductive piece is fixed at the bottom of the movable iron core 10 or the push rod 7, the two flexible reeds 5 are positioned below the conductive piece, the two flexible reeds 5 are respectively provided with a cylindrical leading-out end 9, and the leading-out end 9 extends out of the shell of the relay. Along with the up-and-down movement of the movable iron core 10, the conductive piece is contacted with or separated from the tops of the two flexible reeds 5, and in a contact state, the two flexible reeds 5 respectively generate elastic deformation. The on-off state of the main switch formed by the two static contacts 1 and the movable contact 2 is opposite to the on-off state of the auxiliary switch.

In this embodiment, the two flexible reeds 5 are respectively in an inclined and/or bent shape, and horizontal projections of the two flexible reeds 5 are parallel to each other, as shown in fig. 3. One end of each of the two flexible reeds 5 is a high end and is matched with the conductive piece, and the other end of each of the two flexible reeds 5 is a low end and is provided with the leading-out end 9; the high end of one flexible spring and the low end of the other flexible spring are positioned on the same side, and the low end of one flexible spring and the high end of the other flexible spring are positioned on the same side.

In this embodiment, the high ends of the two flexible springs 5 are respectively provided with a convex bract 51 protruding upwards, and the convex bract 51 is directly punched upwards from the top of the flexible spring 5, but not limited thereto.

In this embodiment, as shown in fig. 4 and 5, the two flexible reeds 5 respectively include an inclined section 52, an upper horizontal portion 53 located at the top end of the inclined section 52, and a lower horizontal portion 54 located at the bottom end of the inclined section 52, where the upper horizontal portion 53 forms the high end of the flexible reed 5, and the lower horizontal portion 54 forms the low end of the flexible reed 5. The inclined section 52 is provided with a long hole 521 along the length direction thereof, so that the flexibility of the flexible spring 5 can be increased. The top end of the leading-out end is fixed with the lower horizontal part 54 of the flexible reed 5 in a riveting or welding mode. The protrusions 51 are provided on the upper horizontal portion 53. The two flexible reeds are similar to a Z shape in structure, but are not limited to the Z shape, and in other embodiments, the two flexible reeds are respectively in an inverted U shape, an S shape or the like.

In this embodiment, the conductive member is fixed to an insulating layer disposed on a side surface of the bottom of the push rod 7, the insulating layer is specifically an insulating sleeve 72, and the insulating sleeve 72 is sleeved outside the bottom of the push rod 7. In other embodiments, the insulating layer is an insulating film or the like. The conductive piece is a rigid reed 8 which is annular and is fixedly sleeved outside the insulating sleeve 72.

In this embodiment, a metal shell is disposed in the coil assembly, and the movable iron core 10, the stationary iron core 30, the conductive member (i.e., the rigid spring 8), and the two flexible springs 5 are located in the metal shell; the bottom of the metal shell is provided with two through holes 61 which are in one-to-one correspondence with the leading-out ends of the two flexible reeds, an insulating ring 8 is arranged in each through hole 61, and the leading-out ends 9 of the two flexible reeds respectively downwards penetrate through the insulating rings 8 in the corresponding through holes and are used for being connected with an external auxiliary contact monitoring loop. The metal shell comprises a metal shell 60 with openings at the top end and the bottom end and a metal sheet 6, the metal sheet 6 is fixedly connected to the opening at the bottom end of the metal shell 60, and the two through holes 61 are formed in the metal sheet 6. Thus, the insulating ring 8 is more convenient to arrange. In other embodiments, the metal housing is a one-piece structure.

In this embodiment, the relay casing includes a housing and an upper cover, a yoke iron piece is arranged in the housing, the coil assembly is arranged in the yoke iron piece, the upper cover is arranged at an opening at the top end of the housing, the two stationary contacts 1 are respectively arranged on an insulating cover located at the top of the iron cup, and the upper ends of the two stationary contacts 1 respectively penetrate through the upper cover in a sealing manner. The structure of the relay case is not limited thereto, and in other embodiments, the relay case is composed of an upper case and a bottom plate or composed of an upper and a lower half cases, or the like.

The utility model discloses a take auxiliary switch's high voltage direct current relay, its theory of operation is: in a normal state, the coil is not energized, the movable contact 2 is separated from the two fixed contacts 1, i.e. the main switch is in an off state, and the movable iron core 10 is in a lowest position under the action of the reaction spring 20, so that the rigid spring 8 and the bracts 51 at the tops of the two flexible springs 5 are kept in a contact state, i.e. the auxiliary switch is in an on state, as shown in fig. 6. When the coil is electrified, the movable iron core 10 moves upwards under the action of the magnetic field to compress the counterforce spring 20 and drive the push rod 7 to move upwards, and the movable contact piece 2 moves upwards along with the upward movement of the push rod 7 until contacting with the bottoms of the two fixed contacts 1 and the contact spring 50 is compressed; at the same time, the rigid spring 8 moves upwards following the top of the two flexible springs 5, gradually separating them, as shown in fig. 7, when the main switch is on and the auxiliary switch is off. Thus, the auxiliary switch can feed back the on-off state of the high-voltage direct-current relay.

The utility model discloses a take auxiliary switch's high-voltage direct current relay, its auxiliary switch can not only realize the overtravel, still makes electrically conductive spare atress repeated and can not appear splitting to, two flexible reeds 5 can set up longer in limited space, thereby softer, and the arm of force is longer, and the power of needs is just little, makes 5 fatigue life of flexible reed strong, is difficult to the fracture, and the bounce that produces simultaneously is also little, is difficult to make movable contact piece 2 kick-back.

The above-mentioned embodiment is only used for further explaining the utility model discloses a take auxiliary switch's high-voltage direct current relay, nevertheless the utility model discloses do not confine the embodiment to, all be according to the utility model discloses a technical entity is to any simple modification, the equivalent change and the modification of making of above embodiment, all fall into the technical scheme's of the utility model protection within range.

Claims (10)

1. A high-voltage direct-current relay with an auxiliary switch comprises two fixed contacts, a movable contact spring, a push rod, a coil assembly, a movable iron core and the auxiliary switch, wherein the movable iron core is arranged in the coil assembly in a vertically movable mode and is fixedly connected with the push rod; the movable contact spring is movably connected with the push rod and is matched with the two fixed contacts; the method is characterized in that: the auxiliary switch comprises a rigid conductive piece and two flexible reeds, the conductive piece is fixedly connected with the movable iron core or the push rod, the two flexible reeds are positioned below the conductive piece, and the two flexible reeds are respectively provided with leading-out ends; along with the up-and-down movement of the movable iron core, the conductive piece is contacted with or separated from the two flexible reeds, and the two flexible reeds respectively generate elastic deformation in a contact state.

2. The hvdc relay with auxiliary switch of claim 1, wherein: the two flexible reeds are respectively in an inclined state and/or a bending state.

3. The hvdc relay with auxiliary switch of claim 2, wherein: the horizontal projections of the two flexible reeds are parallel to each other.

4. The HVDC relay with auxiliary switch of claim 3, wherein: one end of each of the two flexible reeds is a high end and is matched with the conductive piece, and the other end of each of the two flexible reeds is a low end and is provided with the leading-out end; the high end of one flexible spring and the low end of the other flexible spring are positioned on the same side, and the low end of one flexible spring and the high end of the other flexible spring are positioned on the same side.

5. The HVDC relay with auxiliary switch of claim 4, wherein: the two flexible reeds respectively comprise an inclined section, an upper horizontal part positioned at the top end of the inclined section and a lower horizontal part positioned at the bottom end of the inclined section, the upper horizontal part forms the high end of the flexible reed, and the lower horizontal part forms the low end of the flexible reed; the inclined section is provided with a long hole along the length direction.

6. The hvdc relay with auxiliary switch of claim 1, wherein: the parts of the two flexible reeds matched with the conductive piece are respectively provided with a convex bract protruding upwards.

7. The hvdc relay with auxiliary switch of claim 1, wherein: the conductive piece is fixed on the insulating layer arranged on the side surface of the bottom of the push rod; the conductive piece is a rigid reed.

8. The hvdc relay with auxiliary switch of claim 1, wherein: the coil assembly is internally provided with a metal shell, and the movable iron core, the conductive piece and the two flexible reeds are positioned in the metal shell; the bottom of the metal shell is provided with two through holes which are in one-to-one correspondence with the leading-out ends of the two flexible reeds, the two through holes are respectively provided with an insulating ring, and the leading-out ends of the two flexible reeds respectively downwards penetrate through the insulating rings in the corresponding through holes.

9. The hvdc relay with auxiliary switch of claim 8, wherein: the metal shell comprises a metal shell with top and bottom openings and a metal sheet, the metal sheet is fixedly connected to the bottom opening of the metal shell, and the two through holes are formed in the metal sheet.

10. The hvdc relay with auxiliary switch of claim 1, wherein: the on-off state of the main switch formed by the two fixed contacts and the movable contact is opposite to the on-off state of the auxiliary switch.

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