CN214254280U - Contactor with non-contact auxiliary contact - Google Patents
Contactor with non-contact auxiliary contact Download PDFInfo
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- CN214254280U CN214254280U CN202022926256.9U CN202022926256U CN214254280U CN 214254280 U CN214254280 U CN 214254280U CN 202022926256 U CN202022926256 U CN 202022926256U CN 214254280 U CN214254280 U CN 214254280U
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- contact
- magnetic steel
- auxiliary contact
- contactor
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Abstract
The utility model provides a contactor with non-contact auxiliary contacts, which comprises an arc extinguishing chamber, a static contact, a moving contact and a central transmission shaft, wherein the moving contact is vertically connected to the lower end part of the central transmission shaft; the bottom of the central transmission shaft is provided with an upper magnetic steel, the upper magnetic steel and the lower magnetic steel are arranged to be homopolar, and the lower magnetic steel moves up and down along with the central transmission shaft to drive the lower auxiliary contact to be connected with and disconnected from the upper auxiliary contact. The utility model discloses a non-contact structural design installs auxiliary contact actuating mechanism seal in contactor arc extinguishing chamber lower part, utilizes the homopolar repulsion effect of magnet steel from top to bottom, promotes auxiliary circuit's upper and lower auxiliary contact switch-on when the actuating system moves down, realizes the judgement of contactor action state.
Description
Technical Field
The utility model belongs to the technical field of the contactor, especially, relate to a contactor with non-contact auxiliary contact.
Background
The auxiliary contact is an important component for assisting in judging the connection and disconnection states of the main circuit of the contactor, and when a control system where the contactor is located sends a connection or disconnection signal to the contactor, whether a contactor actuating system completes the connection or disconnection action needs to be fed back through the auxiliary contact.
When the control system sends a connection signal, the contactor actuating system moves downwards, the moving contact moves downwards to be lapped with the two fixed contacts, the main circuit is connected, meanwhile, the auxiliary contact actuating mechanism moves downwards to enable the upper auxiliary contact to be lapped with the lower auxiliary contact, the auxiliary circuit is connected, the control system can judge that the connection action of the contactor is completed through the auxiliary circuit, the contactor is in a connection state, otherwise, when the control system sends a disconnection signal, the contactor actuating system moves upwards, the moving contact moves upwards to be separated from the two contact heads, the main circuit is disconnected, meanwhile, the auxiliary contact actuating mechanism moves upwards synchronously, the upper auxiliary contact is separated from the lower auxiliary contact in a contact mode, the auxiliary circuit is disconnected, and the control system judges that the disconnection action of the contactor is completed through the auxiliary circuit, and the contactor is in a disconnection state.
The actual state of the contactor actuating system can be effectively judged through the auxiliary contact, and whether the contactor works normally or not can be judged by comparing the actual state with the command state sent by the control system, so that the method is an important means for monitoring the system state and diagnosing faults.
The conventional contactor auxiliary contacts are mainly divided into two types, namely contact structures, namely a push rod reed type contact structure and a side-mounted microswitch type contact structure. The push rod reed type auxiliary contact structure is shown in fig. 1 and 2.
The push rod reed auxiliary contact structure is a contact structure, as shown in fig. 1, a stepped hole is formed in the center of the bottom surface of an arc extinguishing cavity 2 of the contactor, and an auxiliary push rod 7 is installed in the stepped hole and can slide up and down along the hole wall. An upper auxiliary contact 8 and a lower auxiliary contact 9 are arranged below the auxiliary push rod 7. When the action system acts, the central transmission shaft 5 moves downwards, the main circuit is switched on, simultaneously, the bottom of the central transmission shaft 5 pushes the auxiliary push rod 7 downwards, the auxiliary push rod 7 moves downwards in the stepped hole, and the upper auxiliary contact 8 is pushed to be in contact with the lower auxiliary contact 9, so that the auxiliary circuit is switched on.
The structure principle is simple, the number of parts is small, the realization is easy, but the following problems exist: (1) in order to ensure the push rod to smoothly slide up and down, the auxiliary push rod is in clearance fit with the step hole of the arc extinguishing chamber, but in the use process of a contactor product, ablation excess in the arc extinguishing chamber is gradually increased, so that the push rod slides up and down and is jammed, and the reliability of the action of the auxiliary contact is reduced. (2) The arc extinguishing chamber is usually made of non-metallic materials, and the central position of the bottom of the arc extinguishing chamber can be ablated when the main circuit is reversely powered on, so that the action reliability of the auxiliary push rod and the stepped hole is directly influenced.
A side-mounted microswitch-type auxiliary contact arrangement is shown in figures 3 and 4.
In the structure, a microswitch 1 is used for replacing upper and lower auxiliary contacts 8 and 9 as an on-off component of an auxiliary circuit, an auxiliary push rod 7 part is fixedly connected to a moving contact 4, a push arm extends out of the side direction of the auxiliary push rod, when a contactor receives a switch-on command sent by a control system, an actuating system drives a central transmission shaft 5, the moving contact 4 and the auxiliary push rod 7 to move downwards simultaneously, the moving contact is in lap joint with a static contact, when a main circuit is switched on, the auxiliary push rod 7 moves downwards along the side direction of the push arm and pushes a microswitch touch button 12, the microswitch acts, the auxiliary circuit is switched on, and the control system judges that the action of the contactor is finished and is in a switch-on state; when the contactor receives a breaking instruction sent by a control system, an actuating system is released, the central transmission shaft 5, the moving contact 4 and the auxiliary push rod 7 move upwards simultaneously, the moving contact is separated from the static contact, the main circuit is broken, meanwhile, the auxiliary push rod 7 moves upwards towards the push arm to separate from the micro switch contact button 12, the micro switch contact button 12 is released, the auxiliary circuit is cut off, and the control system judges that the breaking action of the contactor is finished and the contactor is in a breaking state.
The side-mounted micro-switch type auxiliary contact adopts a micro-switch device with a contact packaged therein, and the side of the micro-switch device is mounted outside an arc extinguishing chamber, and an auxiliary push rod 7 moves up and down in a sliding groove formed in the side wall of the arc extinguishing chamber, as shown in fig. 5.
Because the micro switch 1 is arranged outside the arc extinguishing chamber 2 and is not affected by the ablation of contacts in the arc extinguishing chamber 2, and the micro switch 1 is an independent packaging device, the auxiliary contact has high action reliability, but has the corresponding defect (1). the auxiliary contact structure needs large installation space, and needs to accommodate the micro switch 1 and an installation micro switch fixing circuit board besides an auxiliary push rod 7 with larger volume, and can be arranged in a circular contactor shown in the upper figure, but in a square contactor, the appearance size of a product can be greatly increased; (2) in order to facilitate the up-and-down sliding of the auxiliary push rod 7, a groove needs to be formed in the side wall of the arc extinguishing chamber, so that on one hand, the strength of the arc extinguishing chamber is reduced, on the other hand, the groove destroys the sealing performance of the arc extinguishing chamber, and when the contactor is connected and disconnected, ablation gas generated in the chamber escapes, thereby affecting the insulating performance of an auxiliary circuit; (3) the auxiliary push rod 7 is relatively complex in structure, is generally formed by injection molding of nylon or other non-metallic materials for convenience in processing, and can be seriously ablated when the contactor bears reverse large current, so that the action reliability can be sharply reduced.
For this reason, there is a strong need in the art to develop a contactor that can overcome the above-mentioned technical problems of the prior art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a contactor with non-contact auxiliary contact can solve current contactor side dress auxiliary contact structural damage arc extinguishing cavity integrality, causes the electric arc to leak easily, produces the problem of damage to the outer structure, solves the easy technical problem that the jam of bottom installation push-down auxiliary contact, action reliability are low.
The utility model provides a contactor with non-contact auxiliary contacts, which comprises an arc extinguishing chamber, wherein a static contact, a moving contact for forming two active contacts and a central transmission shaft for driving the moving contact to move up and down to be opened and closed with the static contact are arranged in the arc extinguishing chamber, the moving contact is vertically connected with the lower end part of the central transmission shaft, wherein,
the bottom of the arc extinguishing cavity is provided with a chute, a lower magnetic steel is arranged below the central transmission shaft and arranged at the top of the chute, an upper auxiliary contact and a lower auxiliary contact are further arranged in the chute, the upper auxiliary contact and the lower auxiliary contact are sequentially arranged below the lower magnetic steel, and the lower auxiliary contact is arranged below the upper auxiliary contact;
the bottom of the central transmission shaft is provided with upper magnetic steel, the upper magnetic steel and the lower magnetic steel are arranged to be homopolar, and the lower magnetic steel drives the lower auxiliary contact to be connected with and disconnected with the upper auxiliary contact along with the up-and-down movement of the central transmission shaft.
Preferably, an upper auxiliary contact clamping groove and a lower auxiliary contact clamping groove are respectively formed in the arc extinguishing chamber, the upper auxiliary contact is accommodated in the upper auxiliary contact clamping groove, and the lower auxiliary contact is accommodated in the lower auxiliary contact clamping groove.
Preferably, the upper magnetic steel is arranged in a circular ring structure, and the upper magnetic steel of the circular ring structure is sleeved at the bottom of the central transmission shaft.
Preferably, the upper magnetic steel is provided with a plurality of magnetic steels with arc surfaces, and the arc surfaces are used for being matched with the outer surface of the central transmission shaft.
Preferably, the upper magnetic steel is fixedly connected with the central transmission shaft in a riveting mode.
Preferably, the upper magnetic steel is fixedly connected with the central transmission shaft in a bonding mode.
Preferably, the upper magnetic steel and the central transmission shaft are fixed in a threaded connection mode.
Preferably, the upper auxiliary contact is provided as an upper spring, and the lower auxiliary contact is provided as a lower spring.
Preferably, the welding leading-out end of the upper reed, the lower reed and the auxiliary circuit is fixed in the installation groove at the bottom of the arc extinguishing cavity.
Preferably, the upper magnetic steel is arranged in a disc-shaped, square-shaped or polygonal-shaped structure.
The utility model discloses a contactor with non-contact auxiliary contact compares prior art and has following beneficial effect:
1. the utility model discloses a non-contact structural design installs auxiliary contact actuating mechanism seal in contactor arc extinguishing chamber lower part, utilizes the homopolar repulsion effect of magnet steel from top to bottom, promotes auxiliary circuit's upper and lower auxiliary contact switch-on when actuating the system and move down, realizes the judgement of contactor action state.
2. The utility model discloses a make contactor auxiliary contact system and main circuit and actuating mechanism relatively independent, do not produce physical contact and interference each other, do not destroy arc extinguishing system's integrality, solved the action reliability decline and the insulating properties decline problem that prior art must bring in arc extinguishing chamber bottom trompil or lateral wall fluting, the action reliability and the electrical insulation performance under the product area that effectively improve carries the operating mode have improved product life.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural view of a contactor having a push rod reed type auxiliary contact in the prior art;
fig. 2 is a partial structure view of a contactor having a push rod reed type auxiliary contact according to the prior art;
FIG. 3 is a schematic diagram of a prior art auxiliary contact contactor having a side-mounted microswitch type;
FIG. 4 is a schematic view of a portion of a prior art auxiliary contact contactor having a side mounted microswitch type contact;
FIG. 5 is a schematic perspective view of a side-mounted microswitch type contactor in the prior art;
fig. 6 is a schematic structural diagram of a contactor with non-contact auxiliary contacts according to the present invention;
fig. 7 is a partial schematic structural view of a contactor with non-contact auxiliary contacts according to the present invention;
fig. 8 is a partially enlarged schematic view of a portion a of fig. 6.
Description of reference numerals:
1. microswitch 2, arc extinguishing chamber 3 and static contact
4. Moving contact 5, central transmission shaft 6 and sliding groove
7. Auxiliary push rod 8, upper auxiliary contact 9 and lower auxiliary contact
10. Upper magnetic steel 11, lower magnetic steel 12, microswitch touch button
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
As shown in fig. 1 and 2, a conventional push-rod reed type contactor having auxiliary contacts is shown, as shown in fig. 3 to 5, and a conventional side-mounted micro-switch type contactor having auxiliary contacts is shown, in which the auxiliary contacts of both contactors are provided in a contact type configuration.
As shown in fig. 6 and 7, for the utility model provides a contactor with non-contact auxiliary contact, including arc extinguishing chamber 2, be equipped with static contact 3 in this arc extinguishing chamber 2, be used for forming two active contact's moving contact 4 to and be used for driving moving contact 4 up-and-down motion with the central transmission shaft 5 with the switching of static contact 3, moving contact 4 is connected perpendicularly on the lower tip of central transmission shaft 5.
As shown in fig. 8, fig. 8 is a partially enlarged schematic view of fig. 6 at a, a chute 6 is arranged at the bottom of the arc extinguishing chamber 2, a lower magnetic steel 11 is arranged below the central transmission shaft 5, the lower magnetic steel 11 is arranged at the top of the chute 6, an upper auxiliary contact 8 and a lower auxiliary contact 9 are further arranged in the chute 6, the upper auxiliary contact 8 and the lower auxiliary contact 9 are sequentially arranged below the lower magnetic steel 11, and the lower auxiliary contact 9 is arranged below the upper auxiliary contact 8; the bottom of the central transmission shaft 5 is provided with an upper magnetic steel 10, and the upper magnetic steel 10 and the lower magnetic steel 11 are homopolar. When the upper magnetic steel 10 moves downwards along with the central transmission shaft 5, the distance between the upper magnetic steel 10 and the lower magnetic steel 11 is reduced, the lower magnetic steel 11 moves downwards under the action of the repulsion force of the upper magnetic steel and the lower magnetic steel, the upper auxiliary contact 8 is pushed to move downwards to be lapped with the lower auxiliary contact 9, and the auxiliary circuit is connected; when the upper magnetic steel 10 moves upwards along with the central transmission shaft 5, the distance between the upper magnetic steel 10 and the lower magnetic steel 11 is increased, the repulsive force is weakened, the lower magnetic steel 11 moves upwards under the action of the elastic force of the upper auxiliary contact 8, the upper auxiliary contact 8 is disconnected with the lower auxiliary contact 9, and the auxiliary circuit is disconnected.
The utility model adopts the non-contact structural design of the central transmission shaft 5 and the lower magnetic steel 11, the auxiliary contact actuating mechanism is hermetically arranged at the lower part of the arc extinguishing cavity 2 of the contactor, and when the actuating system moves downwards, the upper auxiliary contact 8 and the lower auxiliary contact 9 of the auxiliary circuit are pushed to be communicated by utilizing the homopolar repulsion action of the upper magnetic steel 10 and the lower magnetic steel 11; when the action system moves upwards, the repulsive force is weakened, the upper auxiliary contact 9 moves upwards under the self elastic force and is disconnected with the lower auxiliary contact 9, and the action state of the contactor is judged.
In a further embodiment of the present invention, the arc extinguishing chamber 2 is respectively provided with an upper auxiliary contact 8 slot and a lower auxiliary contact 9 slot, the upper auxiliary contact 8 is accommodated in the upper auxiliary contact 8 slot, and the lower auxiliary contact 9 is accommodated in the lower auxiliary contact 9 slot.
In a further embodiment of the invention, the upper auxiliary contact 8 is arranged as an upper reed and the lower auxiliary contact 9 is arranged as a lower reed. Wherein, the welding leading-out end of the upper reed, the lower reed and the auxiliary circuit is fixed in the installation groove at the bottom of the arc extinguishing cavity 2. Because the lower magnetic steel 11 is arranged at the top or the upper part in the chute 6, one end of the upper reed, which is in contact with the lower magnetic steel 11, is in a cantilever state in the chute 6, and the lower reed is combined with the homopolar magnetic mutual repulsion characteristic along with the downward movement of the central transmission shaft 5, so that the lower magnetic steel 11 also moves downward under the repulsion action of the upper magnetic steel 10, and the upper reed elastically deforms under the pushing action of the lower magnetic steel 11 and is in lap joint with the lower reed, thereby switching on the auxiliary circuit, and further judging that the main circuit is also switched on according to the switching on of the auxiliary circuit. Along with the upward movement of the central transmission shaft 5, the homopolar magnetic repulsion force is weakened, the lower magnetic steel 11 moves upward, the upper reed is not subjected to the pushing action of the lower magnetic steel 11 at the moment and does not generate elastic deformation, and the upper reed is not in lap joint with the lower reed, so that the auxiliary circuit is disconnected, and the main circuit is further judged to be disconnected according to the disconnection of the auxiliary circuit.
The utility model discloses a make contactor auxiliary contact system and main circuit and actuating mechanism relatively independent, do not produce physical contact and interference each other, do not destroy arc extinguishing system's integrality, solved prior art and must set up action reliability decline and insulating property decline scheduling problem that round hole or lateral wall fluting brought in 2 bottoms in arc extinguishing chamber, effectively improved action reliability and electrical insulation performance under the product area year operating mode, improved product life.
It should be noted that the upper magnetic steel 10 is installed at the bottom of the central transmission shaft 5 of the motion system, and the two are fixedly connected. The lower surface of the upper magnetic steel 10 and the upper surface (i.e. the two opposite surfaces) of the lower magnetic steel 11 must ensure the same polarity (the same N pole or the same S pole) so as to ensure that the lower magnetic steel 11 moves downwards under the action of the magnetic force of the repulsion of the same poles when the central transmission shaft 5 drives the upper magnetic steel 10 to move downwards, so that the upper and lower reeds are lapped and an auxiliary circuit is switched on.
In a further embodiment of the present invention, the upper magnetic steel 10 is set to be a circular ring structure, and the upper magnetic steel 10 of the circular ring structure is sleeved on the bottom of the central transmission shaft 5. The circular upper magnetic steel 10 is an integrated magnetic steel structure, and the circular upper magnetic steel 10 is directly sleeved outside the central transmission shaft 5. Or, the upper magnetic steel 10 may be provided with a plurality of magnetic steels having arc surfaces, and the arc surface of each magnetic steel may be matched with the outer surface of the central transmission shaft 5. In order to enable the upper magnetic steel 10 to be connected with the central transmission shaft 5 more firmly, the upper magnetic steel 10 is fixedly connected with the central transmission shaft 5 in a riveting mode, and the riveting mode connection has the advantages of being simple in process equipment, shock-resistant, impact-resistant, firm, reliable and the like. Or, the upper magnetic steel 10 and the central transmission shaft 5 can be fixed in a threaded or screw connection mode, so that the fixing is easy to operate, and the upper magnetic steel and the central transmission shaft can be firmly fixed together.
The upper magnetic steel 10 may be designed into a sheet or block structure, for example, the upper magnetic steel 10 may be designed into a sheet, a square sheet, or a polygonal sheet structure, or may be in other shapes, and is not limited to a circular ring structure. Go up magnet steel 10 and central transmission shaft 5 can be through sticky mode fixed connection, and fixed operation is simple and convenient like this, also is convenient for install magnet steel 10, still is favorable to the maintenance and the inspection in later stage. Alternatively, they may be fixed together by welding.
The shape of the lower magnetic steel 11 is matched with the cavity contour of the sliding groove 6. At this time, the lower magnetic steel 11 is only required to be placed at the top of the sliding groove 6 and abuts against the upper reed, and the upper magnetic steel 10 can move up and down under the magnetic action.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (10)
1. A contactor with non-contact auxiliary contacts is characterized by comprising an arc extinguishing chamber, wherein a static contact, a moving contact for forming two active contacts and a central transmission shaft for driving the moving contact to move up and down to be opened and closed with the static contact are arranged in the arc extinguishing chamber, the moving contact is vertically connected to the lower end part of the central transmission shaft, wherein,
the bottom of the arc extinguishing cavity is provided with a chute, a lower magnetic steel is arranged below the central transmission shaft and arranged at the top of the chute, an upper auxiliary contact and a lower auxiliary contact are further arranged in the chute, the upper auxiliary contact and the lower auxiliary contact are sequentially arranged below the lower magnetic steel, and the lower auxiliary contact is arranged below the upper auxiliary contact;
the bottom of the central transmission shaft is provided with upper magnetic steel, the upper magnetic steel and the lower magnetic steel are arranged to be homopolar, and the lower magnetic steel drives the lower auxiliary contact to be connected with and disconnected with the upper auxiliary contact along with the up-and-down movement of the central transmission shaft.
2. The contactor as claimed in claim 1, wherein the arc extinguishing chamber is provided with an upper auxiliary contact engaging groove and a lower auxiliary contact engaging groove, respectively, the upper auxiliary contact being received in the upper auxiliary contact engaging groove, and the lower auxiliary contact being received in the lower auxiliary contact engaging groove.
3. The contactor with the non-contact auxiliary contact according to claim 1, wherein the upper magnetic steel is arranged in a circular ring structure, and the upper magnetic steel of the circular ring structure is sleeved at the bottom of the central transmission shaft.
4. The contactor with non-contact auxiliary contacts as claimed in claim 1, wherein the upper magnetic steel is provided as a plurality of magnetic steels having a circular arc surface for matching with an outer surface of the central transmission shaft.
5. The contactor with the non-contact auxiliary contact according to claim 1, wherein the upper magnetic steel is fixedly connected with the central transmission shaft by riveting.
6. The contactor according to claim 1, wherein said upper magnetic steel is fixedly connected to said central shaft by adhesion.
7. The contactor according to claim 1, wherein the upper magnetic steel is fixed to the central shaft by a screw connection.
8. The contactor as claimed in claim 1, wherein the upper auxiliary contact is provided as an upper spring, and the lower auxiliary contact is provided as a lower spring.
9. The contactor as claimed in claim 8, wherein the upper and lower spring plates and the auxiliary circuit soldering terminal are fixed in the mounting groove of the bottom of the arc extinguishing chamber.
10. The contactor with the non-contact auxiliary contact according to claim 1, wherein the upper magnetic steel is provided in a disc-shaped or polygonal plate-shaped structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022926256.9U CN214254280U (en) | 2020-12-07 | 2020-12-07 | Contactor with non-contact auxiliary contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022926256.9U CN214254280U (en) | 2020-12-07 | 2020-12-07 | Contactor with non-contact auxiliary contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214254280U true CN214254280U (en) | 2021-09-21 |
Family
ID=77737038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022926256.9U Active CN214254280U (en) | 2020-12-07 | 2020-12-07 | Contactor with non-contact auxiliary contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214254280U (en) |
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2020
- 2020-12-07 CN CN202022926256.9U patent/CN214254280U/en active Active
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Effective date of registration: 20220118 Address after: 100000 No. 106, unit 2, building 5, zone 1, yuandayuan, Century City, Haidian District, Beijing Patentee after: Rong Guoren Address before: 100094 209, 2nd floor, building 2, South Tangjialing village, Haidian District, Beijing Patentee before: Beijing tongnai Technology Co.,Ltd. |