Direct current contactor with conversion auxiliary contact

Abstract

The utility model discloses a direct current contactor with a conversion auxiliary contact, which comprises an auxiliary contact assembly formed by stacking a supporting base plate, a third insulating base plate, a static contact assembly, a second insulating base plate, a static contact assembly and a pressing sheet in sequence from top to bottom, and the static contact assembly comprises an auxiliary static contact installed on the first insulating base plate through riveting. A spring is further assembled in the auxiliary contact assembly, and contact between the auxiliary static contact and the auxiliary movable contact is achieved through rising of the linkage mechanism. According to the contactor, the two auxiliary springs are installed on the linkage mechanism, when the linkage mechanism acts, the movable point of the auxiliary contact and the static point of the auxiliary contact are made to make contact or be separated, and the auxiliary springs are directly added to the existing linkage mechanism to achieve the function of converting the auxiliary contacts. The device has the characteristics of simpler structure and higher reliability.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the contactor technical field, concretely relates to a direct current contactor with conversion auxiliary contact point. BACKGROUND

[0002] The contactor is a control electric appliance for power on-off. When the contactor coil is electrified, a magnetic field is generated, excitation drives the linkage mechanism, and the main contact point and the static contact point are closed. When the coil is de-energized, the linkage mechanism drives the main contact point and the static contact point to be disconnected under the action of the spring, so that the power on-off control is achieved.

[0003] In order to detect the on-off state of the contactor main contact point, the prior art usually installs an external micro switch in the contactor product, the micro switch is synchronously turned on and off with the main contact point through the push piece installed on the linkage mechanism of the contactor, and the detection of the main contact point on-off condition is realized through the indicating lamp connected with the micro switch terminal. The direct current contactor with micro switch disclosed in the Chinese utility model patent CN207705113U is provided with a group of moving contact points at both ends of the sheet spring, the static contact point is arranged at the position corresponding to the moving contact point, the sheet spring is in an arch shape and can bend upward or downward with the main shaft, and different indicating lamps are lit respectively. The opening and closing conditions in the interior can be directly reflected by the indicating lamp, and the stability is good and the service life is long.

[0004] However, the contactor product is limited by the internal miniaturization space, and there is no extra space to install the micro switch, and the micro switch needs to be externally purchased. UTILITY MODEL CONTENTS

[0005] In order to solve the above problems, the utility model aims at providing a direct current contactor with conversion auxiliary contact point.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: a direct current contactor with conversion auxiliary contact point, including support pad plate, third insulating pad plate, static contact point assembly, second insulating pad plate, static contact point assembly, auxiliary contact point assembly which is stacked from top to bottom by pressing sheet, the static contact point assembly includes auxiliary static contact point which is installed on the first insulating pad plate through riveting, and a spring is further assembled in the auxiliary contact point assembly, and the contact of the auxiliary static contact point and the auxiliary moving contact point is realized through the rising of the linkage mechanism.

[0007] Further, the inner end face of the support pad plate is in a stepped shape, the first auxiliary spring is buckled on the step, the first insulating washer is in contact with the other end of the first auxiliary spring, the auxiliary moving contact point is sleeved on the first insulating washer, and the second insulating washer is sleeved on the auxiliary moving contact point.

[0008] Further, a first supporting bushing is arranged on the heart rod of the linkage mechanism, a second auxiliary spring is sleeved on the first supporting bushing, a second supporting bushing is arranged on the outer end surface of the first supporting bushing, and the second supporting bushing is clamped with the second insulating washer.

[0009] Further, a third insulating washer, a first insulating washer, a second insulating washer and a first insulating washer are sequentially arranged on the lower end of the supporting pad plate, and the auxiliary static contact point is symmetrically arranged on the first insulating washer.

[0010] Further, the first supporting bushing, the second supporting bushing, the first insulating washer and the second insulating washer are coaxial with the heart rod.

[0011] Further, the auxiliary contact point assembly is fixed on one end of the heart rod through a nut, a main contact point moving point and a linkage mechanism are sequentially connected to the other end of the heart rod, and a contact spring is arranged in the linkage mechanism.

[0012] Further, the supporting pad plate is fixed on the linkage mechanism.

[0013] Further, the materials of the main contact point moving point, the auxiliary moving contact point and the auxiliary static contact point are copper materials; the materials of the contact spring, the first auxiliary spring and the second auxiliary spring are carbon steel wires; the materials of the first insulating washer, the second insulating washer, the third insulating washer, the first insulating washer and the second insulating washer are plastics; and the materials of the first supporting bushing, the second supporting bushing, the pressing sheet, the supporting pad plate and the nut are metals.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] 1. The two auxiliary springs are arranged on the linkage mechanism, and the auxiliary contact point moving point and the auxiliary contact point static point are contacted or separated when the linkage mechanism acts, so that the function of a group of conversion auxiliary contact points is realized by directly adding the auxiliary springs on the existing linkage mechanism, and compared with the original micro switch mode, the device has the characteristics of simpler structure and higher reliability.

[0016] 2. The structure of the device can design various load types and contact types of auxiliary contact points, and a group of normally open auxiliary contact points or normally closed auxiliary contact points can be used to realize the functions of synchronous monitoring of main contact point on-off and other circuit functions, and two groups of normally open auxiliary contact points can be used to simultaneously realize the functions of synchronous monitoring of main contact point on-off and other circuit functions. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the specific embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, obviously, the drawings described below are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0018] Figure 1 It is auxiliary static contact and insulating pad 1 riveting installation schematic diagram;

[0019] Figure 2 It is partial stereoscopic structure schematic diagram;

[0020] Figure 3 It is partial sectional view;

[0021] Figure 4 It is product non-working state auxiliary contact schematic diagram;

[0022] Figure 5 It is product non-working state auxiliary contact schematic diagram.

[0023] In the drawing, 1-linkage mechanism, 2-main contact dynamic point, 3-main contact static point, 4-contact spring, 5-first auxiliary spring, 6-second auxiliary spring, 7-auxiliary dynamic contact, 8-auxiliary static contact, 9-first insulating pad, 10-second insulating pad, 11-third insulating pad, 12-first support bushing, 13-second support bushing, 14-pressing piece, 15-core rod, 16-support pad, 17-nut, 18-first insulating washer, 19-second insulating washer. DETAILED DESCRIPTION

[0024] The utility model will be further described below in combination with the drawings and specific embodiments, but should not be understood as the scope of the subject matter described in the utility model is limited to the following embodiments, any modification, replacement and change according to the ordinary technical knowledge and conventional means in the art without departing from the above technical concept of the utility model, all are included in the scope of the utility model.

[0025] Referring to Figures 2-3 Auxiliary static contact 8 is installed on first insulating pad 9 by riveting, forming static contact assembly, static contact assembly, second insulating pad 10, static contact assembly, third insulating pad 11, support pad 16, pressing piece 14 are stacked together, and then fixed with screw, forming auxiliary contact assembly.

[0026] The auxiliary contact assembly is passed through the core rod 15, and is fixed on the linkage mechanism 1 by welding the support base plate 16 of the auxiliary contact assembly. The first auxiliary spring 5 is installed in the support base plate 16, the bottom of the first auxiliary spring 5 is attached to the step of the support base plate 16, then the first insulating washer 18 is installed above the first auxiliary spring 5, the auxiliary moving contact 7 is sleeved on the first insulating washer 18, and the auxiliary moving contact 7 is attached to the auxiliary stationary contact 8 on the upper end face, and the second insulating washer 19 is sleeved on the auxiliary moving contact 7.

[0027] The first support bushing 12 is fixed on the step of the linkage mechanism 1, then the second support bushing 13 is installed, the step of the second support bushing 13 is attached to the step of the second insulating washer 19, then the second auxiliary spring 6 is installed, the bottom of the second auxiliary spring 6 is attached to the step of the first support bushing 12, and the end of the core rod 15 is fixed by the nut 17.

[0028] The first support bushing 12, the second support bushing 13, the first insulating washer 18 and the second insulating washer 19 are coaxial with the core rod 15.

[0029] The specific working process of the DC contactor with conversion auxiliary contact is as follows:

[0030] The main contact moving point 2 and the main contact stationary point 3 are set as a normally open structure, when the linkage mechanism is actuated to make the main contact moving point 2 contact the main contact stationary point 3, the linkage mechanism 1 is also actuated to make the auxiliary moving contact and the auxiliary stationary contact contact or separate.

[0031] As shown in Figure 4 When the product is not connected to an external power supply, the main contact moving point 2 and the main contact stationary point 3 are in a disconnected state, the bottom auxiliary moving contact is attached to the auxiliary stationary contact, and the normally closed auxiliary contact is in a connected state.

[0032] As shown in Figure 5 When the product is connected to a power supply, the linkage mechanism moves upward to make the main contact moving point 2 contact the main contact stationary point 3, and the product is connected; at the same time, the linkage mechanism moves upward with the second auxiliary spring 6 and the second support bushing 16, the second support bushing 16 moves upward with the auxiliary moving contact 7 and the first auxiliary spring 5, and the auxiliary moving contact 7 is closed with another group of auxiliary stationary contacts, and the normally open auxiliary contact is connected, so as to realize the conversion auxiliary contact function.

[0033] The main contact moving point 2, the main contact static point 3, the auxiliary moving contact 7 and the auxiliary static contact 8 are made of copper material with excellent conductivity. The contact spring 4, the first auxiliary spring 5 and the second auxiliary spring 6 are made of carbon steel wire. The first insulating pad 9, the second insulating pad 10, the third insulating pad 11, the first insulating washer 18 and the second insulating washer 19 are made of plastic and have the functions of fixing and insulating. The first supporting bush 12, the second supporting bush 13, the pressing sheet 14, the screw, the supporting pad 16 and the nut are made of metal material with high strength.

[0034] In the application, the main contact moving point 2 and the main contact static point 3 are arranged in the normally open structure, and when the linkage mechanism is in action to make the main contact moving point 2 contact with the main contact static point 3, the linkage mechanism also makes the auxiliary moving contact 7 contact with the auxiliary static contact 8 or separate from the auxiliary static contact 8. Figure 1 The auxiliary contact outgoing ends are three, the normally open outgoing hole and the normally closed outgoing hole in the auxiliary contact outgoing ends are connected together through wires to form the common end of the converted auxiliary contact, and the other auxiliary static contact outgoing hole is connected with the auxiliary contact normally open outgoing end and the auxiliary static contact outgoing hole is connected with the auxiliary contact normally closed outgoing end.

[0035] The above has introduced the DC contactor with the converted auxiliary contact in detail, the structure and the working principle of the application are described by applying specific examples in the text, and the above embodiment is only used for helping to understand the method and the core idea of the application. It should be pointed out that for the ordinary skilled in the art, without departing from the principle of the application, the application can be improved and modified in many ways, and these improvements and modifications also fall within the scope of the claims of the application.

Claims

1. A DC contactor with a transfer auxiliary contact, characterized by: The auxiliary contact assembly is sequentially stacked from top to bottom and comprises a support backing plate (16), a third insulating backing plate (11), a static contact assembly, a second insulating backing plate (10), a static contact assembly, and a pressing plate (14). The static contact assembly comprises an auxiliary static contact (8) installed on the first insulating backing plate (9) by riveting. A spring is also assembled inside the auxiliary contact assembly. The auxiliary static contact (8) and an auxiliary dynamic contact (7) are contacted by the rising of the linkage mechanism (1).

2. The DC contactor with transition auxiliary contact according to claim 1, characterized in that: The inner end surface of the support backing plate (16) is stepped. A first auxiliary spring (5) is buckled on the step. A first insulating washer (18) is contacted at the other end of the first auxiliary spring (5). The auxiliary dynamic contact (7) is sleeved on the first insulating washer (18). A second insulating washer (19) is sleeved on the auxiliary dynamic contact (7).

3. The DC contactor with transition auxiliary contact according to claim 1, characterized in that: A first support bushing (12) is arranged on the heart rod (15) of the linkage mechanism (1). A second auxiliary spring (6) is sleeved on the first support bushing (12). A second support bushing (13) is arranged on the outer end surface of the first support bushing (12). The second support bushing (13) is clamped with the second insulating washer (19).

4. The DC contactor with transition auxiliary contact according to claim 1, characterized in that: A third insulating backing plate (11), a first insulating backing plate (9), a second insulating backing plate (10), and a first insulating backing plate (9) are sequentially arranged at the lower end of the support backing plate (16). The auxiliary static contact (8) is symmetrically arranged on the first insulating backing plate (9).

5. The DC contactor with transition auxiliary contact according to claim 3, characterized in that: The first support bushing (12), the second support bushing (13), the first insulating washer (18), and the second insulating washer (19) are coaxial with the heart rod (15).

6. The DC contactor with transition auxiliary contact according to claim 1, characterized in that: The auxiliary contact assembly is fixed on one end of the heart rod (15) by a nut (17). The other end of the heart rod (15) is sequentially connected with a main contact dynamic point (2) and a linkage mechanism (1). A contact spring (4) is arranged in the linkage mechanism (1).

7. The DC contactor with transition auxiliary contact according to claim 1, characterized in that: The support backing plate (16) is fixed on the linkage mechanism (1).

8. The DC contactor with transition auxiliary contact according to claim 1, characterized in that: The materials of the main contact dynamic point (2), the auxiliary dynamic contact (7), and the auxiliary static contact (8) are copper materials. The materials of the contact spring (4), the first auxiliary spring (5), and the second auxiliary spring (6) are carbon steel wires. The materials of the first insulating backing plate (9), the second insulating backing plate (10), the third insulating backing plate (11), the first insulating washer (18), and the second insulating washer (19) are plastics. The materials of the first support bushing (12), the second support bushing (13), the nut (17), the support backing plate (16), and the pressing plate (14) are metals.

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