A high voltage DC relay with auxiliary contacts

Abstract

The invention discloses a high-voltage DC relay with auxiliary contacts, including a ceramic cover, a main contact lead-out terminal, a push rod assembly, an active spring, an auxiliary contact lead-out terminal and an auxiliary moving spring; the main contact lead-out terminal and the auxiliary contact lead-out terminal are respectively fixed at the top wall of the ceramic cover and the bottom ends are extended into the cavity of the ceramic cover, the active spring and the auxiliary moving spring are respectively matched with the bottom ends corresponding to the main contact lead-out terminal and the auxiliary contact lead-out terminal; the two auxiliary contact lead-out terminals are distributed on both sides of the connection line between the two main contact lead-out terminals, and the auxiliary moving spring is also connected to a plastic body; the plastic body is also provided with plastic retaining walls between the two sides corresponding to the two ends of the auxiliary moving spring and the main contact lead-out terminal. The invention can prevent the arc generated when the moving and static contacts are separated from polluting the auxiliary contact structure, and can achieve insulation between strong and weak electricity; it can also prevent the auxiliary moving spring from being touched during the assembly turnover process, causing the auxiliary moving spring to be polluted or deformed.

Description

Technical Field

[0001] The invention relates to the technical field of relays, in particular to a high-voltage direct current relay with auxiliary contacts. Background Art

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic adjustment, safety protection, and circuit conversion in the circuit. Most of the high-voltage DC relays in the prior art adopt a dynamic spring direct-acting scheme (also known as a solenoid direct-acting scheme). The contact part of this DC relay includes two static contacts and a dynamic component. The dynamic component includes a dynamic spring part and a push rod assembly. The dynamic spring part is composed of a dynamic spring and dynamic contacts at both ends of the dynamic spring. The dynamic spring is a direct-acting type. When the dynamic contacts at both ends of the dynamic spring are in contact with the two static contacts (i.e., the load lead-out terminals), the current flows in from one of the static contacts and flows out from the other static contact after passing through the dynamic spring. With the rapid development of new energy, some applications in new energy vehicles and charging supporting equipment, photovoltaic / wind power generation systems, engineering vehicles, UPS and other fields. In the automotive market, the mileage required is getting higher and higher, so the space utilization of the battery is optimized as much as possible. In the early stage, high-voltage inspection is more used for relay adhesion. Currently, more and more customers require the relay itself to have an auxiliary contact function. A high-voltage DC relay with auxiliary contacts in the prior art is to fix two auxiliary contact lead-out terminals on the top wall of the ceramic cover and extend their respective bottom ends into the cavity of the ceramic cover, and the two auxiliary contact lead-out terminals are symmetrically distributed between the two static contacts (i.e., the main static contacts). When the main contact is disconnected, an arc is generated, resulting in the metal particles with greater heat being scattered irregularly in the ceramic cavity after the arc is broken, thereby causing the auxiliary contact structure to be contaminated, and in severe cases, it may be ablated and damaged, thereby affecting the use function of the auxiliary contact structure. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a high-voltage DC relay with auxiliary contacts. Through structural improvement, the arc generated when the moving and static contacts are separated can be prevented from polluting the auxiliary contact structure, and insulation between strong and weak electricity can be achieved; at the same time, it can also prevent the auxiliary moving spring from being touched during the assembly turnover process, causing the auxiliary moving spring to be contaminated or deformed.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a high-voltage DC relay with auxiliary contacts, including a ceramic cover, a main contact lead-out terminal, a push rod assembly, an active reed, an auxiliary contact lead-out terminal and an auxiliary moving reed; two main contact lead-out terminals and two auxiliary contact lead-out terminals are respectively fixed on the top wall of the ceramic cover and their respective bottom ends extend into the cavity of the ceramic cover, the active reed is installed on the top of the push rod assembly, and the two ends of the active reed are respectively matched with the bottom ends of the two main contact lead-out terminals; the two auxiliary contact lead-out terminals are distributed on both sides of the connecting line between the two main contact lead-out terminals, the auxiliary moving reed is installed on the top of the push rod assembly, and the two ends of the auxiliary moving reed are respectively matched with the bottom ends of the two auxiliary contact lead-out terminals; the auxiliary moving reed is also connected to a plastic body; in the plastic body, plastic retaining walls are respectively provided between the two sides corresponding to the two ends of the auxiliary moving reed and the main contact lead-out terminals, so as to use the retaining walls to prevent the arc generated when the moving and static contacts are separated from polluting the auxiliary contact structure.

[0005] The connection line between the two auxiliary contact lead-out terminals intersects perpendicularly with the connection line between the two main contact lead-out terminals.

[0006] The midpoint of the line between the two auxiliary contact lead-out terminals intersects with the midpoint of the line between the two main contact lead-out terminals.

[0007] The plastic body includes an intermediate plastic body that wraps the middle part of the auxiliary movable spring piece and a U-shaped plastic body connected to both sides of the intermediate plastic body. The U-shaped bottom walls of the two U-shaped plastic bodies are respectively connected to the two sides of the intermediate plastic body as a whole, and the U-shaped side walls of the two U-shaped plastic bodies are respectively arranged on both sides of the width of the two ends of the auxiliary movable spring piece to form the retaining wall.

[0008] The plastic body further comprises a bottom plastic body, which is connected to the bottom surfaces of the middle plastic body and the U-shaped plastic body so that the auxiliary moving reed is insulated from the active reed below.

[0009] The push rod assembly includes a U-shaped bracket and a spring, and the active spring sheet is pressed against the inner side of the top wall of the U-shaped bracket through the spring; the bottom plastic body is also connected to a fixing sheet, and the plastic body is fixed on the top wall of the U-shaped bracket through the fixing sheet.

[0010] The fixing plate is provided with a convex burl protruding downward, and the fixing plate is riveted and fixed to the U-shaped bracket through the convex burl.

[0011] In the intermediate plastic body, first notches are provided at positions corresponding to two side walls of the U-shape of the U-shaped plastic body.

[0012] At both ends of the auxiliary moving spring, a U-shaped bending portion for increasing the elasticity of the two ends of the auxiliary moving spring is provided near the junction with the U-shaped bottom wall of the U-shaped plastic body, and the U-shaped opening of the U-shaped bending portion faces downward.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] 1. The present invention adopts a plastic body connected to the auxiliary moving spring, and plastic retaining walls are respectively provided between the two sides corresponding to the two ends of the auxiliary moving spring and the main contact lead-out end. This structure of the present invention can use the plastic retaining walls to prevent the arc generated when the moving and static contacts are separated from polluting the auxiliary contact structure.

[0015] 2. The present invention adopts a plastic body including an intermediate plastic body that wraps the middle part of the auxiliary movable spring, a U-shaped plastic body connected to both sides of the intermediate plastic body, and a bottom plastic body; and the U-shaped bottom walls of the two U-shaped plastic bodies are respectively connected to both sides of the intermediate plastic body to form a whole, and the two U-shaped side walls of the two U-shaped plastic bodies are respectively arranged on both sides of the width of the two ends of the auxiliary movable spring to form the retaining wall, and the bottom plastic body is connected to the bottom surface of the intermediate plastic body and the U-shaped plastic body. In this structure of the present invention, the two ends of the auxiliary movable spring are surrounded by the area surrounded by the U-shaped plastic body and the bottom plastic body, so that the auxiliary movable spring can be insulated from the active spring below; at the same time, it can also prevent the auxiliary movable spring from being touched during the assembly turnover process, causing the auxiliary movable spring to be contaminated or deformed.

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, the high-voltage DC relay with auxiliary contacts of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of a partial structure of an embodiment of the present invention;

[0018] Figure 2 is a schematic diagram of a partial structure of an embodiment of the present invention (excluding a ceramic cover and a frame);

[0019] Figure 3 is a top view of a partial structure of an embodiment of the present invention (excluding a ceramic cover and a frame);

[0020] Figure 4 It is a three-dimensional structural schematic diagram of the push rod assembly, the auxiliary dynamic spring, the plastic body and the fixing plate in accordance with an embodiment of the present invention;

[0021] Figure 5 It is a schematic diagram of a three-dimensional structure of a push rod assembly, an auxiliary moving spring, a plastic body, and a fixing plate in cooperation with each other according to an embodiment of the present invention;

[0022] Figure 6 It is an exploded front view of the structure of the push rod assembly, the auxiliary moving spring, the plastic body and the fixing plate in the embodiment of the present invention;

[0023] Figure 7 It is a schematic diagram of the three-dimensional structure of the auxiliary movable spring, the plastic body and the fixed sheet in the embodiment of the present invention;

[0024] Figure 8 This is a front view of the auxiliary movable spring, the plastic body and the fixed sheet in cooperation with each other according to an embodiment of the present invention;

[0025] Fig. 9 It is a top view of the auxiliary movable spring, the plastic body and the fixed sheet in cooperation with each other according to an embodiment of the present invention;

[0026] Fig.10 It is a side view of the auxiliary movable spring, the plastic body and the fixed sheet in cooperation with each other according to an embodiment of the present invention;

[0027] Fig.11 It is a schematic diagram of the exploded three-dimensional structure of the auxiliary movable spring, the plastic body and the fixed sheet in the embodiment of the present invention;

[0028] Fig.12 is a schematic diagram of the three-dimensional structure of a fixing plate according to an embodiment of the present invention;

[0029] Fig.13 is a front view of a fixing plate of an embodiment of the present invention;

[0030] Fig.14 is a top view of a fixing plate according to an embodiment of the present invention;

[0031] Fig.15 1 is a side view of a fixing plate according to an embodiment of the present invention. DETAILED DESCRIPTION

[0032] Example

[0033] See also Figures 1 to 7As shown, a high-voltage DC relay with auxiliary contacts of the present invention comprises a ceramic cover 1, a main contact lead-out terminal 2, a push rod assembly 3, an active reed 4, an auxiliary contact lead-out terminal 5 and an auxiliary moving reed 6; two main contact lead-out terminals 2 and two auxiliary contact lead-out terminals 5 are respectively fixed on the top wall 11 of the ceramic cover 1 and their respective bottom ends extend into the cavity of the ceramic cover 1, and the ceramic cover 1 is composed of a top wall 11 and a side wall 12; the active reed 4 is mounted on the top of the push rod assembly 3, and the two ends of the active reed 4 (i.e., active contacts) are respectively matched with the bottom ends of the two main contact lead-out terminals 2 (i.e., main static contacts); the two auxiliary contact lead-out terminals 2 are respectively connected to ... The ends 5 are distributed on both sides of the connection line between the two main contact lead-out terminals 2, the auxiliary moving spring 6 is installed on the top of the push rod assembly 3, and the two ends of the auxiliary moving spring 6 are respectively provided with moving contacts 62, and the moving contacts 62 at the two ends of the auxiliary moving spring 6 are respectively matched with the bottom ends of the two auxiliary contact lead-out terminals (i.e., auxiliary static contacts); the auxiliary moving spring 6 is also connected to a plastic body 7; in the plastic body 7, plastic retaining walls 71 are respectively provided between the two sides corresponding to the two ends of the auxiliary moving spring 6 and the main contact lead-out terminals 2, so as to use the retaining walls 71 to prevent the arc generated when the moving and static contacts are separated from causing pollution to the auxiliary contact structure.

[0034] In this embodiment, the line connecting the two auxiliary contact lead-out terminals 5 and the line connecting the two main contact lead-out terminals 2 intersect vertically.

[0035] In this embodiment, the midpoint of the line between the two auxiliary contact lead-out terminals 5 intersects with the midpoint of the line between the two main contact lead-out terminals 2 .

[0036] In this embodiment, the plastic body 7 includes an intermediate plastic body 72 that wraps the middle part of the auxiliary dynamic spring piece 6 and a U-shaped plastic body 73 connected to both sides of the intermediate plastic body. The U-shaped bottom walls of the two U-shaped plastic bodies 73 are respectively connected to the two sides of the intermediate plastic body 72 as a whole, and the two side walls of the U-shape of the two U-shaped plastic bodies 73 are respectively arranged on both sides of the width of the two ends of the auxiliary dynamic spring piece 6 to form the retaining wall 71.

[0037] In this embodiment, the plastic body 7 further includes a bottom plastic body 74 , which is connected to the bottom surfaces of the intermediate plastic body 72 and the U-shaped plastic body 73 , so that the auxiliary dynamic reed 6 is insulated from the active reed 4 below.

[0038] In this embodiment, the push rod assembly 3 includes a U-shaped bracket 31 and a spring 32, and the active spring 4 is pressed against the inner side of the top wall of the U-shaped bracket 31 through the spring 32; the bottom plastic body 74 is also connected to a fixing plate 81, and the plastic body 7 is fixed on the top wall of the U-shaped bracket 31 through the fixing plate 81.

[0039] In this embodiment, the fixing plate 81 is provided with a convex bulge 811 protruding downward, and the fixing plate 81 is fixed to the U-shaped bracket 31 by riveting through the convex bulge 811 .

[0040] In this embodiment, the intermediate plastic body 72 is provided with first notches 721 at positions corresponding to the two side walls of the U-shaped plastic body 73 .

[0041] In this embodiment, at both ends of the auxiliary movable spring 6, a U-shaped bending portion 61 for increasing the elasticity of the two ends of the auxiliary movable spring is provided near the junction with the U-shaped bottom wall of the U-shaped plastic body 73, and the U-shaped mouth of the U-shaped bending portion 61 faces downward.

[0042] When the plastic body 7, the auxiliary movable spring piece 6 and the fixing piece 81 are combined, the auxiliary movable spring piece 6 and the fixing piece 81 can be fixed in the plastic body 7 by insert injection molding when the plastic body 7 is formed; or the plastic body 7 can be formed by injection molding, and then the auxiliary movable spring piece 6 and the fixing piece 81 are installed on the plastic body 7; or the middle plastic body 72, the U-shaped plastic body 73, a part of the bottom plastic body 74 and the auxiliary movable spring piece 6 of the plastic body 7 can be formed into one part by insert injection molding, and the other part of the bottom plastic body 74 and the fixing piece 81 can be formed into another part by insert injection molding, and then the two parts are assembled together.

[0043] The present invention provides a high-voltage DC relay with auxiliary contacts, wherein the push rod assembly 3 further includes a spring seat 33, a fixing plate 34 and a push rod 35, wherein the spring seat 33 is formed by insert injection molding and the fixing plate 34 and the push rod 35 are fixed therein during injection molding, and the two side walls of the U-shaped bracket 31 are respectively connected to the fixing plate 34; the high-voltage DC relay further includes a frame plate 82, a yoke iron plate 83, a moving iron core 84, a reset spring 85, an anti-short-circuit ring 86 and other components.

[0044] A high-voltage DC relay with auxiliary contacts of the present invention adopts a plastic body 7 connected to an auxiliary moving spring 6, and plastic retaining walls 71 are respectively provided between the two sides corresponding to the two ends of the auxiliary moving spring 6 and the main contact lead-out terminal 2. This structure of the present invention can use the plastic retaining wall 71 to prevent the pollution of the auxiliary contact structure caused by the arc generated when the moving and static contacts are separated.

[0045] A high-voltage DC relay with auxiliary contacts of the present invention adopts a plastic body 7 including an intermediate plastic body 72 in which the middle part of the auxiliary moving spring is wrapped, a U-shaped plastic body 73 connected to both sides of the intermediate plastic body, and a bottom plastic body 74; and the U-shaped bottom walls of the two U-shaped plastic bodies 73 are respectively connected to both sides of the intermediate plastic body 72 to form a whole, and the two U-shaped side walls of the two U-shaped plastic bodies 73 are respectively arranged on both sides of the width of the two ends of the auxiliary moving spring 6 to form the retaining wall 71, and the bottom plastic body 74 is connected to the bottom surface of the intermediate plastic body 72 and the U-shaped plastic body 73. In this structure of the present invention, the two ends of the auxiliary moving spring 6 are surrounded by the area surrounded by the U-shaped plastic body 73 and the bottom plastic body 74, so that the auxiliary moving spring 6 can be insulated from the active spring 2 below; at the same time, it can also prevent the auxiliary moving spring from being touched during the assembly turnover process, causing the auxiliary moving spring to be contaminated or deformed.

[0046] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A high-voltage DC relay with auxiliary contacts, comprising a ceramic cover, a main contact lead-out terminal, a push rod assembly, an active reed, an auxiliary contact lead-out terminal and an auxiliary moving reed; two main contact lead-out terminals and two auxiliary contact lead-out terminals are respectively fixed on the top wall of the ceramic cover and their respective bottom ends extend into the cavity of the ceramic cover, the active reed is mounted on the top of the push rod assembly, and the two ends of the active reed are respectively matched with the bottom ends of the two main contact lead-out terminals; characterized in that: The two auxiliary contact lead-out terminals are distributed on both sides of the connection line between the two main contact lead-out terminals, the auxiliary movable spring is installed on the top of the push rod assembly, and the two ends of the auxiliary movable spring are respectively matched with the bottom ends of the two auxiliary contact lead-out terminals; the auxiliary movable spring is also connected to a plastic body; in the plastic body, plastic retaining walls are respectively provided between the two sides corresponding to the two ends of the auxiliary movable spring and the main contact lead-out terminals; the plastic body includes an intermediate plastic body that wraps the middle part of the auxiliary movable spring and a U-shaped plastic body connected to the two sides of the intermediate plastic body, the U-shaped bottom walls of the two U-shaped plastic bodies are respectively connected to the two sides of the intermediate plastic body as a whole, and the U-shaped side walls of the two U-shaped plastic bodies are respectively arranged on both sides of the width of the two ends of the auxiliary movable spring to form the retaining wall.

2. The high voltage DC relay with auxiliary contacts according to claim 1, characterized in that: The connection line between the two auxiliary contact lead-out terminals intersects perpendicularly with the connection line between the two main contact lead-out terminals.

3. The high voltage DC relay with auxiliary contacts according to claim 2, characterized in that: The midpoint of the line between the two auxiliary contact lead-out terminals intersects with the midpoint of the line between the two main contact lead-out terminals.

4. The high voltage DC relay with auxiliary contacts according to claim 1, characterized in that: The plastic body further comprises a bottom plastic body, which is connected to the bottom surfaces of the middle plastic body and the U-shaped plastic body so that the auxiliary moving reed is insulated from the active reed below.

5. The high voltage DC relay with auxiliary contacts according to claim 4, characterized in that: The push rod assembly includes a U-shaped bracket and a spring, and the active spring sheet is pressed against the inner side of the top wall of the U-shaped bracket through the spring; the bottom plastic body is also connected to a fixing sheet, and the plastic body is fixed on the top wall of the U-shaped bracket through the fixing sheet.

6. The high voltage DC relay with auxiliary contacts according to claim 5, characterized in that: The fixing plate is provided with a convex burl protruding downward, and the fixing plate is riveted and fixed to the U-shaped bracket through the convex burl.

7. The high voltage DC relay with auxiliary contacts according to claim 1, characterized in that: In the intermediate plastic body, first notches are provided at positions corresponding to two side walls of the U-shape of the U-shaped plastic body.

8. The high voltage DC relay with auxiliary contacts according to claim 1, characterized in that: At both ends of the auxiliary moving spring, a U-shaped bending portion for increasing the elasticity of the two ends of the auxiliary moving spring is provided near the junction with the U-shaped bottom wall of the U-shaped plastic body, and the U-shaped opening of the U-shaped bending portion faces downward.

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