Normally closed auxiliary contact group, normally open auxiliary contact group and contactor

By designing a normally closed auxiliary contact group including an arc extinguishing chamber, a first auxiliary contact plate, a second auxiliary contact plate and an auxiliary top rod, the problem of unreliability and complex manufacturing of normally closed auxiliary contacts in existing DC contactors is solved, and the efficient on-off function and low-cost production of the DC circuit are realized.

CN222749407UActive Publication Date: 2025-04-11NANJING QUANNING ELECTRIC +1
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202421373547.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-17
Publication Date
2025-04-11
Estimated Expiration
2034-06-17

AI Technical Summary

Technical Problem

Existing DC contactors have problems such as inability to be normally closed auxiliary contacts, or unreliable normally closed auxiliary contacts, complex manufacturing processes, high cost, large volume, and arc leakage.

Method used

A normally closed auxiliary contact group is designed, including an arc extinguishing chamber, a first auxiliary contact plate, a second auxiliary contact plate and an auxiliary hoist. Through the optimization of assembly process and structural design, the function of bringing a normally closed auxiliary contact is realized, and it is equipped with a normally open auxiliary contact group and a contactor.

Benefits of technology

This design realizes the on-off function of the DC circuit, has DC2000V load-breaking capability, zero power consumption of the coil body, IP68 protection level performance, closed arc extinguishing room without arc leakage risk, optimized assembly process, easy installation, easy automatic assembly, improve work efficiency, and low cost.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222749407U_ABST
    Figure CN222749407U_ABST
Patent Text Reader

Abstract

The utility model discloses a normally closed auxiliary contact group, a normally open auxiliary contact group and a contactor, belonging to the technical field of electrical switches, including: an arc extinguishing chamber; a first auxiliary touch plate installed in the arc extinguishing chamber; a second auxiliary touch plate installed in the arc extinguishing chamber and cooperating with the first auxiliary touch plate; an auxiliary top rod running through the arc extinguishing chamber for separating the first auxiliary touch plate from the second auxiliary touch plate. The normally closed auxiliary contact group, the normally open auxiliary contact group and the contactor are used for switching on and off DC circuits, and can also be used for switching on and off AC circuits; they have their own normally closed auxiliary contacts, and can also have their own normally open auxiliary contacts, are small in size, have a DC2000V load breaking capacity, zero power consumption of the coil body, IP68 protection grade performance, the arc extinguishing chamber is sealed without the risk of arc leakage, the assembly process is optimized, the installation is convenient, and it is easy to automatically assemble, improve work efficiency, and have the advantages of low cost.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical switches, and in particular relates to a normally closed auxiliary contact group, a normally open auxiliary contact group and a contactor. Background Art

[0002] As one of the most widely used electrical switches, contactors are in huge demand. Existing similar DC contactors have the problems of being unable to make normally closed auxiliary contacts, or the normally closed auxiliary contacts are unreliable, the manufacturing process is complex and the cost is high, the size is large, and there is arc leakage. Therefore, it is necessary to develop a new normally closed auxiliary contact group, a normally open auxiliary contact group and a contactor to solve the existing problems. Utility Model Content

[0003] The utility model aims to provide a normally closed auxiliary contact group, a normally open auxiliary contact group and a contactor to solve the problem of unreliable auxiliary contacts.

[0004] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a normally closed auxiliary contact group, comprising:

[0005] Arc extinguishing chamber;

[0006] A first auxiliary contact plate mounted on the arc extinguishing chamber;

[0007] a second auxiliary contact plate assembled in the arc extinguishing chamber and cooperating with the first auxiliary contact plate;

[0008] An auxiliary push rod passes through the arc extinguishing chamber and is used to separate the first auxiliary contact plate from the second auxiliary contact plate.

[0009] Preferably, the auxiliary ejector includes:

[0010] An auxiliary top rod body passing through the arc extinguishing chamber;

[0011] and an auxiliary push rod spherical column fixed to the auxiliary push rod body for pushing the first auxiliary touch plate.

[0012] Preferably, the arc extinguishing chamber is provided with an arc extinguishing chamber central guide hole for assembling the auxiliary top rod and enabling it to move;

[0013] And an auxiliary push rod guide groove of the arc extinguishing chamber for limiting the position and preventing the spherical column of the auxiliary push rod from rotating.

[0014] Preferably, the arc extinguishing chamber is further provided with a normally closed auxiliary touch plate placement groove for assembling the first auxiliary touch plate and the second auxiliary touch plate.

[0015] Preferably, the first auxiliary touch panel is provided with a first auxiliary touch panel contact head for contacting and separating with the second auxiliary touch panel.

[0016] Preferably, the second auxiliary touch panel is provided with a second auxiliary touch panel contact head protruding from a horizontal side surface thereof and located below the first auxiliary touch panel.

[0017] The utility model further provides a normally open auxiliary contact group, in which the second auxiliary contact plate in the above-mentioned normally closed auxiliary contact group is replaced by the first auxiliary contact plate;

[0018] Among them, the two first auxiliary touch panels are in a disconnected state by default.

[0019] The utility model further provides a contactor, comprising:

[0020] A contact system connected in series; the contact system comprises:

[0021] The above-mentioned normally closed auxiliary contact group and normally open auxiliary contact group.

[0022] Preferably, the contactor further comprises:

[0023] A housing for the contact system;

[0024] And an upper cover connected with the shell to form a sealed cavity.

[0025] Preferably, the contact system is filled with gas;

[0026] And the gaps between the shell, the contact system and the upper cover are filled with potting glue.

[0027] The technical effects and advantages of the utility model are as follows: the normally closed auxiliary contact group, the normally open auxiliary contact group and the contactor are used for switching on and off DC circuits, and can also be used for switching on and off AC circuits; they have their own normally closed auxiliary contacts and can also have their own normally open auxiliary contacts, are small in size, have a DC2000V load breaking capacity, zero power consumption of the coil body, IP68 protection grade performance, a closed arc extinguishing chamber with no risk of arc leakage, an optimized assembly process, convenient installation, easy automated assembly, improved work efficiency, and low cost, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the contactor of the utility model;

[0029] Figure 2 It is a top view of the contactor of the utility model;

[0030] Figure 3 It is a cross-sectional view of the contactor of the utility model;

[0031] Figure 4 This is a schematic diagram of the utility model without the upper cover and the housing installed;

[0032] Figure 5 It is a schematic diagram of the potting glue filling area of ​​the utility model;

[0033] Figure 6 It is a schematic diagram of assembling two contact systems of the utility model by connecting copper bars;

[0034] Figure 7 This is a schematic diagram of the assembly of the normally closed auxiliary contact of the utility model;

[0035] Figure 8 For this utility model Figure 7 AA section view;

[0036] Fig. 9 This is the assembly diagram of the normally open auxiliary contact group of the utility model

[0037] Fig.10 For this utility model Fig. 9 BB cross-sectional view;

[0038] Fig.11 This is a schematic diagram of the structure of the contactor upper cover of the utility model;

[0039] Fig.12 This is a schematic diagram of the spherical column structure of the auxiliary ejector rod of the utility model;

[0040] Fig.13 This is a schematic diagram of the structure of the auxiliary ejector rod of the utility model;

[0041] Fig.14 This is a schematic diagram of the structure of the first auxiliary touch panel of the utility model;

[0042] Fig.15 This is a schematic diagram of the structure of the second auxiliary touch panel of the utility model;

[0043] Fig.16 It is a schematic diagram of the auxiliary top rod guide groove of the arc extinguishing chamber of the utility model;

[0044] Fig.17 It is a schematic diagram of the central guide hole of the arc extinguishing chamber of the utility model;

[0045] Fig.18 It is a schematic diagram of the normally open auxiliary touch panel placement slot of the utility model.

[0046] In the figure: 101, auxiliary contact group; 101-1, guide groove of auxiliary push rod of arc extinguishing chamber; 101-2, fixing screw hole of auxiliary contact plate; 101-3, placement groove of normally closed auxiliary contact plate; 101-4, placement groove of normally open auxiliary contact plate; 101-5, central guide hole of arc extinguishing chamber; 101-6, arc extinguishing chamber; 101-7, normally closed auxiliary contact group; 101-8, normally open auxiliary contact group; 102, auxiliary push rod; 102-1, spherical column of auxiliary push rod; 103, first auxiliary contact plate; 103-1, contact head of first auxiliary contact plate; 104, second auxiliary Touch panel; 104-1, second auxiliary touch panel contact head; 105, first screw; 106, contact system; 106-1, contact system screw fixing groove; 106-2, inflation tube; 107, connecting copper bus; 108, potting glue; 109, upper cover; 109-1, upper cover potting hole; 109-2, upper cover lead hole; 109-3, upper cover screw fixing hole; 110, shell; 110-1, first support and limit rib of shell; 110-2, second support and limit rib of shell; 110-3, shell limit and fixation column; 111, energy-saving control board; 113, second screw. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] The utility model provides Figure 7 , Figure 8 A normally closed auxiliary contact group 101-7 shown in the figure comprises an arc extinguishing chamber 101-6, an auxiliary top rod 102, a first auxiliary contact plate 103, a second auxiliary contact plate 104, and an arc extinguishing chamber 101-6 provided with a normally closed auxiliary contact plate placement groove 101-3 or a normally open auxiliary contact plate placement groove 101-4 or an arc extinguishing chamber auxiliary top rod guide groove 101-1 or an auxiliary contact plate fixing screw hole 101-2 or an arc extinguishing chamber center guide hole 101-5;

[0049] like Fig.12 , Fig.13 As shown, an auxiliary mandrel 102 having an auxiliary mandrel spherical column 102-1 is provided;

[0050] like Fig.14 As shown, a first auxiliary touch panel 103 is provided with a first auxiliary touch panel contact head 103-1;

[0051] like Fig.15As shown, a second auxiliary touch pad 104 is provided with a second auxiliary touch pad contact head 104-1;

[0052] The utility model also provides a Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 6 The novel contactor shown is composed of a contact system 106, a housing 110, an upper cover 109, a connecting copper bus 107, etc.;

[0053] The arc extinguishing chamber 101-6 is provided with a normally closed auxiliary contact plate placement slot 101-3 or a normally open auxiliary contact plate placement slot 101-4;

[0054] like Figure 7 , Figure 8 , Fig.12 , Fig.13 , Fig.14 , Fig.15 , Fig.16 , Fig.17 As shown, the cylinder of the auxiliary mandrel 102 is installed in the central guide hole 101-5 of the arc extinguishing chamber, and the auxiliary mandrel spherical column 102-1 is installed in the auxiliary mandrel guide groove 101-1 of the arc extinguishing chamber. The central guide hole 101-5 of the arc extinguishing chamber and the auxiliary mandrel guide groove 101-1 of the arc extinguishing chamber play a role of limiting and anti-rotation, and the auxiliary mandrel 102 can only move up and down; the first auxiliary contact plate 103 and the second auxiliary contact plate 104 are respectively assembled to the corresponding positions of the normally closed auxiliary contact plate placement groove 101-3, and the first screw 105 is installed. The first auxiliary contact plate contact head 103-1 and the second auxiliary contact plate contact head 104-1 are in contact and connected state by default, so the first auxiliary contact plate 103 and the second auxiliary contact plate 104 are in the connected state by default, so this combination is the normally closed auxiliary contact group 101-7 by default;

[0055] The utility model also provides Fig. 9 , Fig.10 , Fig.12 , Fig.13 , Fig.14 , Fig.16 , Fig.17 , Fig.18The normally open auxiliary contact group 101-8 shown in the figure is composed of an arc extinguishing chamber 101-6, an auxiliary mandrel 102, a first auxiliary contact plate 103, a first screw 105, etc.; the cylinder of the auxiliary mandrel 102 is installed in the central guide hole 101-5 of the arc extinguishing chamber, and the auxiliary mandrel spherical column 102-1 is installed in the auxiliary mandrel guide groove 101-1 of the arc extinguishing chamber. The central guide hole 101-5 of the arc extinguishing chamber and the auxiliary mandrel guide groove 101-1 of the arc extinguishing chamber play a role in limiting and preventing rotation, and the auxiliary mandrel 102 can only move up and down; two first auxiliary contact plates 103, respectively assembled to the normally open The first screw 105 is installed in the corresponding position of the auxiliary touch pad placement slot 101-4, and the two first auxiliary touch pad contact heads 103-1 are in a disconnected and isolated state by default, so the two first auxiliary touch pads 103 are in a disconnected and isolated state by default, so this combination is defaulted to a normally open auxiliary contact group 101-8; wherein, the normally open auxiliary touch pad placement slot 101-4 and the normally closed auxiliary touch pad placement slot 101-3 are axially symmetrically distributed; in this embodiment, the normally open auxiliary touch pad placement slot 101-4 is located at the digital mark 1, and the normally closed auxiliary touch pad placement slot 101-3 is located at the digital mark 2; the normally open auxiliary touch pad placement slot 101-4 is provided with a step compared to the normally closed auxiliary touch pad placement slot 101-3.

[0056] The housing 110 is provided with a first housing support and limit rib 110-1, a second housing support and limit rib 110-2, and a housing limit and fixation column 110-3; the above structure is used to support the position of the fixed contact system 106;

[0057] like Fig.11 As shown, the upper cover 109 is provided with an upper cover glue injection hole 109-1, an upper cover lead hole 109-2 for installing the lead of the energy-saving control board 111, and an upper cover screw fixing hole 109-3;

[0058] The two contact systems 106 are connected in series by connecting copper bars 107. The coil control part of this contactor can also be equipped with an energy-saving board control board 111 according to the needs.

[0059] Potting glue: Figure 5 As shown, the gap between the housing 110 and the contact system 106 is filled with the potting glue 108; the contact system screw fixing groove 106-1 is filled with the potting glue 108;

[0060] Inflation: Use a vacuum inflation table to fill the inflation tube 106-2 with gas at a certain pressure, and use special pliers to clamp and seal the inflation tube 106-2.

[0061] Assemble the upper cover 109: the upper cover screw fixing hole 109-3 corresponds to the housing limit fixing column 110-3, and the upper cover screw fixing hole 109-3 is installed with the second screw 113;

[0062] Potting glue: The potting glue 108 flows through the upper cover potting hole 109 - 1 to fill the gaps between the housing 110 and the contact system 106 and the upper cover 109 ;

[0063] The potting glue 108 may be epoxy resin, but is not limited to glue types;

[0064] The gas may be nitrogen or hydrogen or a mixture of gases, but is not limited to the gas type;

[0065] The auxiliary contact group 101 and the contact system 106 may be circular or square in shape, but are not limited to the shape; the contact system may not be equipped with the auxiliary contact group 101, but only with the arc extinguishing chamber 101-6;

[0066] The normally closed auxiliary contact group, the normally open auxiliary contact group and the contactor are used for switching on and off DC circuits, and can also be used for switching on and off AC circuits. They have built-in normally closed auxiliary contacts and can also have built-in normally open auxiliary contacts. They are small in size, have a DC2000V load breaking capacity, zero power consumption of the coil body, IP68 protection grade performance, a closed arc extinguishing chamber with no risk of arc leakage, optimized assembly process, convenient installation, easy automated assembly, improved work efficiency, and low cost.

[0067] Finally, it should be noted that the above is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A normally closed auxiliary contact group (101-7), characterized in that: include: Arc extinguishing chamber (101-6); A first auxiliary contact plate (103) mounted on the arc extinguishing chamber (101-6); a second auxiliary contact plate (104) mounted in the arc extinguishing chamber (101-6) and cooperating with the first auxiliary contact plate (103); An auxiliary top rod (102) passes through the arc extinguishing chamber (101-6) and is used to separate the first auxiliary contact plate (103) from the second auxiliary contact plate (104).

2. A normally closed auxiliary contact group (101-7) according to claim 1, characterized in that: The auxiliary ejector rod (102) comprises: An auxiliary top rod body penetrating the arc extinguishing chamber (101-6); And an auxiliary push rod spherical column (102-1) fixed to the auxiliary push rod body and used for pushing the first auxiliary touch plate (103).

3. A normally closed auxiliary contact group (101-7) according to claim 2, characterized in that: The arc extinguishing chamber (101-6) is provided with an arc extinguishing chamber central guide hole (101-5) for assembling the auxiliary top rod (102) and enabling the auxiliary top rod (102) to move; And an arc extinguishing chamber auxiliary push rod guide groove (101-1) for limiting the position and preventing the auxiliary push rod spherical column (102-1) from rotating.

4. A normally closed auxiliary contact group (101-7) according to claim 1, 2 or 3, characterized in that: The arc extinguishing chamber (101-6) is also provided with a normally closed auxiliary touch plate placement groove (101-3) for assembling the first auxiliary touch plate (103) and the second auxiliary touch plate (104).

5. The normally closed auxiliary contact group (101-7) according to claim 1, characterized in that: The first auxiliary touch panel (103) is provided with a first auxiliary touch panel contact head (103-1) that contacts and separates from the second auxiliary touch panel (104).

6. A normally closed auxiliary contact group (101-7) according to claim 1 or 5, characterized in that: The second auxiliary touch panel (104) is provided with a second auxiliary touch panel contact head (104-1) protruding from its horizontal side surface and located below the first auxiliary touch panel (103).

7. A normally open auxiliary contact group (101-8), characterized in that: The second auxiliary touch panel (104) in the normally closed auxiliary contact group (101-7) described in any one of claims 1 to 6 is replaced by a first auxiliary touch panel (103); two of the first auxiliary touch panels (103) are mounted in the normally open auxiliary touch panel placement slots (101-4); The two first auxiliary touch panels (103) are in a disconnected state by default.

8. A contactor, characterized in that: include: A contact system (106) connected in series; The contact system (106) comprises: The normally closed auxiliary contact group (101-7) as described in any one of claims 1 to 6 and / or the normally open auxiliary contact group (101-8) as described in any one of claims 1 to 7.

9. A contactor according to claim 8, characterized in that: The contactor also includes: A housing (110) for arranging the contact system (106); And an upper cover (109) connected to the shell (110) to form a sealed cavity.

10. A contactor according to claim 9, characterized in that: The contact system (106) is filled with gas; And the gaps between the housing (110), the contact system (106) and the upper cover (109) are filled with potting glue (108).