High-voltage direct-current relay

Abstract

The utility model discloses a high-voltage direct-current relay which comprises an insulating cover and a yoke clamp, the yoke clamp is provided with a first tail end and a second tail end, the first tail end is connected with the second tail end, so that an annular structure is defined by the yoke clamp, and the annular structure surrounds the periphery of the insulating cover. According to the yoke clamp, the one-piece structure is adopted, the first tail end and the second tail end are connected to form the annular structure, and compared with the design that two U-shaped yoke clamps are adopted in the prior art, on one hand, the yoke clamp is of the one-piece structure, the number of parts is reduced, assembling is convenient, and the assembling efficiency is improved; and on the other hand, the yoke clamp is easy to machine, automation is easier to achieve, and the machining efficiency is remarkably improved.

Description

Technical Field

[0001] The present application relates to the technical field of electric control devices, and in particular to a high-voltage direct current relay. 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. A relay is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] A high-voltage DC relay is a type of relay. A high-voltage DC relay in the prior art includes an insulating cover, a pair of static contacts, a moving contact, etc. The pair of static contacts are respectively arranged on the top of the insulating cover, the moving contact is located inside the insulating cover, and the two ends of the moving contact in the length direction can respectively match with the bottom of the pair of static contacts.

[0004] In addition, in order to improve the arc extinguishing effect, the high-voltage DC relay in the prior art usually also has an arc extinguishing part on the periphery of the insulating cover. The arc extinguishing part may include a yoke clamp and a permanent magnet. The yoke clamp surrounds the periphery of the insulating cover, and the permanent magnet is arranged on the side surface of the yoke clamp facing the insulating cover.

[0005] However, in the prior art, the number of yoke iron clips of the arc extinguishing part is two, and each yoke iron clip is in a U-shape, which results in many parts and complicated assembly process when assembling the arc extinguishing part. Utility Model Content

[0006] The embodiment of the present application provides a high-voltage DC relay, which achieves the purpose of reducing the number of parts of the arc extinguishing part through the design of an integrated yoke and iron clamp structure, and effectively improves the problem of inconvenient assembly of the arc extinguishing part in the prior art.

[0007] The high voltage DC relay of the embodiment of the present application comprises:

[0008] Insulation cover; and

[0009] The yoke clamp has a first end and a second end, wherein the first end and the second end are connected so that the yoke clamp forms an annular structure, and the annular structure surrounds the outer periphery of the insulating cover.

[0010] According to some embodiments of the present application, the yoke clamp is a one-piece structure.

[0011] According to some embodiments of the present application, the first end and the second end are directly connected.

[0012] According to some embodiments of the present application, a permanent magnet is further included, and the permanent magnet is arranged between the yoke clamp and the insulating cover.

[0013] According to some embodiments of the present application, the first end and the second end are connected by a connection structure, and the connection structure includes:

[0014] a convex portion disposed on one of the first end and the second end; and

[0015] The concave portion is arranged on the other of the first end and the second end; the convex portion is confined in the concave portion.

[0016] According to some embodiments of the present application, the protrusion is a tenon, and the concave portion is a mortise.

[0017] According to some embodiments of the present application, the shape of the tenon is a dovetail type, and the tenon groove is adapted to the shape of the tenon.

[0018] According to some embodiments of the present application, the yoke clamp further includes:

[0019] a first side wall;

[0020] two second side walls, the two second side walls are respectively connected to two ends of the first side wall in the length direction, and the two second side walls are arranged opposite to each other along the length direction of the first side wall; and

[0021] Two third side walls, the two third side walls are respectively connected to one end of the two second side walls away from the first side wall, and the two third side walls extend from the two second side walls towards each other;

[0022] Wherein, the first end and the second end are respectively formed at one end of two third side walls away from the corresponding second side wall.

[0023] According to some embodiments of the present application, a reinforcement portion is provided at a connection between the first side wall and the second side wall, and at a connection between the second side wall and the third side wall, and the reinforcement portion is protruded from the inner surface of the annular structure.

[0024] According to some embodiments of the present application, at least one of the first side wall, the two second side walls and the two third side walls is provided with a hanging portion, and the hanging portion extends from the upper edge of the yoke clamp to the interior of the annular structure and is hung on the insulating cover.

[0025] According to some embodiments of the present application, a yoke plate is further included, and the insulating cover is provided on one side of the yoke plate in a thickness direction;

[0026] A gap is defined between the yoke clip and the yoke plate.

[0027] According to some embodiments of the present application, two surfaces of the two second side walls facing each other are both convexly provided with limiting portions.

[0028] According to some embodiments of the present application, an upper edge and / or a lower edge of a connection between the first side wall and the second side wall, and an upper edge and / or a lower edge of a connection between the second side wall and the third side wall are provided with a notch.

[0029] One embodiment of the above application has at least the following advantages or beneficial effects:

[0030] The high-voltage DC relay of the embodiment of the present application includes an insulating cover and a yoke clamp. The yoke clamp adopts a one-piece structure, and the first end and the second end are connected to form an annular structure. Compared with the design of two U-shaped yoke clamps in the prior art, on the one hand, the yoke clamp of the embodiment of the present application is a one-piece structure, which reduces the number of parts and thus reduces the assembly process, thereby improving the assembly efficiency; on the other hand, the yoke clamp of the embodiment of the present application is simple to process, easier to automate, and the processing efficiency is significantly improved; on the other hand, the yoke clamp surrounds the outer periphery of the insulating cover to form a closed protective ring, thereby improving the explosion resistance of the insulating cover; in addition, it can also avoid the problem of the yoke clamp loosening or tipping over during the transportation process after the yoke clamp and the insulating cover are assembled and before being loaded into the outer casing, thereby ensuring the assembly quality of the yoke clamp.

[0031] Furthermore, the tenon and the mortise connection facilitates the connection between the first end and the second end of the yoke clamp, thereby improving the assembly efficiency of the yoke clamp.

[0032] Furthermore, by providing a hanging portion, the yoke clamp can be hung on the top of the insulating cover, so that there is a gap between the yoke clamp and the yoke plate, and the yoke clamp does not contact the yoke plate, thereby increasing the electrical gap between the yoke clamp and the yoke plate.

[0033] Furthermore, by providing a notch, discharge at the tip of the yoke clamp at the bend can be prevented. At the same time, a notch is provided at the lower edge of the connection between the first side wall and the second side wall, and a notch is provided at the lower edge of the connection between the second side wall and the third side wall. The notch can also avoid the two side yoke plates of the U-shaped yoke away from one end of the bottom yoke plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic top view of a relay according to an exemplary embodiment.

[0035] Figure 2 is along Figure 1 Section view along the AA cutting line.

[0036] Figure 3 FIG. 1 is a schematic diagram showing a relay with a housing omitted according to an exemplary embodiment.

[0037] Figure 4 is a schematic diagram showing a yoke clamp according to an exemplary embodiment.

[0038] The reference numerals are described as follows:

[0039] 11. Shell

[0040] 111. Opening

[0041] 12. Base

[0042] 21. Insulation cover

[0043] 211. Mounting hole

[0044] 22. Stationary contact

[0045] 24. Frame

[0046] 25. Yoke iron plate

[0047] 251. First Perforation

[0048] 26. Arc extinguishing part

[0049] 261, Yoke clamp

[0050] 261a, Ring structure

[0051] 2611, first side wall

[0052] 2612, second side wall

[0053] 2613, Third Side Wall

[0054] 2613a, first end

[0055] 2613b, second end

[0056] 262.Permanent magnet

[0057] 263. Connection structure

[0058] 2631, convex part

[0059] 2631a, tenon

[0060] 2632, concave part

[0061] 2632a, mortise and tenon

[0062] 264. Suspension

[0063] 265. Limiting part

[0064] 266. Gap

[0065] 267. Strengthening Department

[0066] 27. Metal cover

[0067] 30. Dynamic components

[0068] 31. Moving contact

[0069] 32. First elastic member

[0070] 33. Push rod components

[0071] 40. Magnetic circuit

[0072] 41. Moving iron core

[0073] 42. Static iron core

[0074] 421, Second Perforation

[0075] 43. Coil frame

[0076] 44. Coil

[0077] 45. Magnetic cylinder

[0078] 46. ​​Second elastic member

[0079] 47. U-shaped yoke

[0080] 471, bottom yoke plate

[0081] 472, side yoke plate

[0082] D1, first direction

[0083] D2, Second Direction

[0084] D3. Third direction DETAILED DESCRIPTION

[0085] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0086] It is understood that the terms "including" and "having" and any variations thereof in the embodiments of the present application are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the listed steps or units, but may optionally include steps or units that are not listed, or may optionally include other steps or components that are inherent to these processes, methods, products, or devices.

[0087] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a high-voltage DC relay, and includes a housing 11, a base 12, an insulating cover 21, a yoke iron plate 25, a pair of static contacts 22, an arc extinguishing part 26, a moving component 30 and a magnetic circuit part 40.

[0088] The housing 11 and the base 12 are connected to form a chamber for accommodating the insulating cover 21, at least part of the static contact 22, the arc extinguishing part 26, the moving assembly 30 and the magnetic circuit part 40. The shape formed by the connection of the housing 11 and the base 12 can be a rectangular parallelepiped or a cylindrical shape, which is not limited in the present application.

[0089] As an example, the housing 11 is in the shape of a rectangle with an opening, and the base 12 is roughly a plate-like structure. The base 12 covers the opening of the housing 11 to form a chamber for accommodating the insulating cover 21, at least part of the static contact 22, the arc extinguishing part 26, the moving component 30 and the magnetic circuit part 40.

[0090] Of course, in other embodiments, the housing 11 may be a plate-like structure, and the base 12 may be a rectangular parallelepiped with an opening. Alternatively, the housing 11 and the base 12 may both be rectangular parallelepiped and have an opening on one face, the opening of the housing 11 is arranged opposite to the opening of the base 12, and the housing 11 and the base 12 are fastened together to form a chamber for accommodating the insulating cover 21, at least part of the static contact 22, the arc extinguishing part 26, the moving assembly 30, and the magnetic circuit part 40.

[0091] In one embodiment, the housing 11 and the base 12 are both made of insulating materials, such as plastic, but not limited thereto.

[0092] like Figure 2 As shown, a pair of static contacts 22 are installed on the top of the insulating cover 21, at least part of each static contact 22 is located in the insulating cover 21, and a static contact point is also provided at the bottom of each static contact 22, and the static contact point can be integrally or separately provided at the bottom of the static contact 22. Two openings 111 are provided at positions corresponding to the top of the housing 11 and the insulating cover 21, and the pair of static contacts 22 extend out of the outer surface of the housing 11 through the two openings 111. One static contact 22 serves as a terminal for current inflow, and the other static contact 22 serves as a terminal for current outflow.

[0093] In the embodiment of the present application, two mounting holes 211 are provided on the top of the insulating cover 21, and the positions of the two mounting holes 211 correspond to the positions of the two openings 111, respectively, and a pair of static contacts 22 are respectively provided in the two mounting holes 211. Moreover, each static contact 22 and the insulating cover 21 can be connected by welding, but the present invention is not limited thereto.

[0094] It can be understood that the insulating cover 21 can be made of ceramic material, that is, the insulating cover 21 is a ceramic cover, but it is not limited thereto. For example, in other embodiments, the insulating cover 21 can also be made of plastic material.

[0095] In an embodiment of the present application, the insulating cover 21 is made of ceramic material, and the insulating cover 21 is connected to the yoke iron plate 25 through a frame piece 24. The frame piece 24 can be a metal piece with an annular structure, such as an iron-nickel alloy. One end of the frame piece 24 is connected to the opening edge of the insulating cover 21, for example, by laser welding, brazing, resistance welding, gluing, etc. The other end of the frame piece 24 is connected to the yoke iron plate 25, which can also be done by laser welding, brazing, resistance welding, gluing, etc. A frame piece 24 is arranged between the insulating cover 21 and the yoke iron plate 25 to facilitate the connection between the insulating cover 21 and the yoke iron plate 25.

[0096] Please continue reading Figure 2 The movable assembly 30 is movably disposed in a chamber formed by the housing 11 and the base 12. The movable assembly 30 includes a movable contact 31, a first elastic member 32 and a push rod member 33.

[0097] For the convenience of explanation, the arrangement direction of the pair of stationary contacts 22 is defined as the first direction D1, and the moving direction of the moving assembly 30 is defined as the second direction D2, wherein the first direction D1 is perpendicular to the second direction D2. The direction perpendicular to both the first direction D1 and the second direction D2 is defined as the third direction D3.

[0098] The moving contact 31 is disposed in the insulating cover 21 , and two ends of the moving contact 31 along the first direction D1 are respectively used to contact or separate from the bottoms of a pair of stationary contacts 22 .

[0099] The movable contact 31 may include a contact body and two movable contacts, the movable contacts may be separate parts, and the two movable contacts are connected to both ends of the contact body along the first direction D1. Of course, in other embodiments, the two movable contacts may also be integrally formed at both ends of the contact body along the first direction D1.

[0100] In addition, the movable contact may protrude from the surface of the contact body on one side facing the stationary contact 22 , or may be flush with the surface of the contact body on one side facing the stationary contact 22 .

[0101] It should be noted that the number of the moving contacts 31 included in the moving assembly 30 may be one or more, wherein the number of the moving contacts 31 refers to more than two. When the number of the moving contacts 31 is multiple, the multiple moving contacts 31 are arranged side by side along the third direction D3, and the two ends of each moving contact 31 along the first direction D1 are used to contact or separate with a pair of stationary contacts 22 respectively.

[0102] The two ends of the multiple moving contacts 31 along the first direction D1 are respectively in contact with a pair of stationary contacts 22 to form a reliable parallel circuit. The number of contact points formed by the multiple moving contacts 31 and one stationary contact 22 is greater than or equal to two, achieving the effect of current shunting. In addition, according to the principle that the magnitude of the electric repulsive force is proportional to the square of the current, the magnitude of the electric repulsive force of each contact point is significantly reduced, which is conducive to the improvement of the short-circuit resistance and the reliability of the relay.

[0103] The push rod member 33 is movably disposed in the first through hole 251 of the yoke plate 25 , and part of the push rod member 33 extends out of the side surface of the yoke plate 25 facing the stationary contact 22 , and part of the push rod member 33 extends out of the side surface of the yoke plate 25 facing away from the stationary contact 22 .

[0104] The moving contact 31 is movably mounted on a portion of the push rod member 33 extending from a surface of the yoke iron plate 25 on one side facing the stationary contact 22. The first elastic member 32 is connected to the push rod member 33 and the moving contact 31, and is used to apply an elastic force to the moving contact 31 in the direction of the stationary contact 22 to provide contact pressure.

[0105] As an example, the first elastic member 32 is a spring, but is not limited thereto.

[0106] The side surface of the yoke iron plate 25 facing away from the static contact 22 is also covered with a metal cover 27, and the metal cover 27 covers the first through hole 251 of the yoke iron plate 25. The push rod member 33 extending from the side surface of the yoke iron plate 25 facing away from the static contact 22 is inserted into the metal cover 27.

[0107] Please continue reading Figure 2 The magnetic circuit part 40 includes a moving iron core 41, a stationary iron core 42, a coil frame 43 and a coil 44. The coil frame 43 is in a hollow cylindrical shape and is made of insulating material. The coil frame 43 is located on the side of the yoke iron plate 25 facing away from the stationary contact 22 and surrounds the outer periphery of the metal cover 27. The coil 44 is wound around the outer periphery of the coil frame 43.

[0108] The static iron core 42 is fixedly disposed in the metal cover 27, and part of the static iron core 42 is inserted into the first through hole 251. The static iron core 42 has a second through hole 421, and the second through hole 421 corresponds to the position of the first through hole 251, so that the push rod member 33 can be movably penetrated in the first through hole 251 and the second through hole 421. The moving iron core 41 is movably disposed in the metal cover 27, and is arranged relative to the static iron core 42 in the second direction D2. The moving iron core 41 is connected to the push rod member 33, and is used to be attracted by the static iron core 42 when the coil 44 is energized. The moving iron core 41 and the push rod member 33 can be connected by screwing, riveting, welding or other methods.

[0109] like Figure 2 As shown, the magnetic circuit portion 40 further includes a second elastic member 46, which is located in the metal cover 27 and disposed between the static iron core 42 and the moving iron core 41, and is used to reset the moving iron core 41 when the coil 44 is de-energized.

[0110] In one embodiment, the second elastic member 46 is a spring, and is sleeved on the outer circumference of the push rod member 33 .

[0111] It should be noted that when the coil 44 is energized, the stationary iron core 42 attracts the moving iron core 41 to move upward, and the moving iron core 41 can drive the push rod member 33 to move upward. When the moving contact 31 contacts the stationary contact 22, the moving contact 31 is stopped by the stationary contact 22, and the push rod member 33 will continue to move upward until the overtravel is completed.

[0112] During the overtravel process, the first elastic member 32 can provide elastic force to the moving contact 31 after being squeezed by the push rod member 33 to provide contact pressure.

[0113] like Figure 2 As shown, the magnetic circuit part 40 also includes a U-shaped yoke 47 and a magnetic tube 45. The U-shaped yoke 47 includes a bottom yoke plate 471 and two side yoke plates 472, the two side yoke plates 472 are respectively connected to the two ends of the bottom yoke plate 471 along the first direction D1, and the two side yoke plates 472 are arranged opposite to each other along the first direction D1. The bottom yoke plate 471 is arranged on the side of the coil frame 43 facing away from the static contact 22, and the ends of the two side yoke plates 472 away from the bottom yoke plate 471 are respectively connected to the two ends of the yoke plate 25 along the first direction D1. The coil 44, the coil frame 43, the metal cover 27 and the moving iron core 41 are arranged in the space surrounded by the yoke plate 25 and the U-shaped yoke 47. The magnetic tube 45 is sleeved on the outer periphery of the metal cover 27, and the magnetic tube 45 is located between the metal cover 27 and the coil frame 43.

[0114] like Figures 2 to 4As shown, the arc extinguishing part 26 includes a permanent magnet 262, and the permanent magnet 262 is arranged on the outer side of the insulating cover 21. By arranging the permanent magnet 262 on the outer periphery of the insulating cover 21, a magnetic field can be formed around the static contact 22 and the moving contact 31. Therefore, through the effect of the magnetic field, the arc generated between the static contact 22 and the moving contact 31 will be stretched in a direction away from each other, thereby achieving arc extinguishing.

[0115] In the embodiment of the present application, the number of the permanent magnets 262 is two, and the two permanent magnets 262 are respectively located on two outer side surfaces of the insulating cover 21 along the first direction D1.

[0116] The arc extinguishing part 26 further includes a yoke clamp 261, which surrounds the outer periphery of the insulating cover 21, and a permanent magnet 262 is disposed between the yoke clamp 261 and the insulating cover 21. By designing that the yoke clamp 261 surrounds the permanent magnet 262, it is possible to prevent the magnetic field generated by the permanent magnet 262 from spreading outward and affecting the arc extinguishing effect.

[0117] In one embodiment, the yoke clip 261 is made of a soft magnetic material, which may include but is not limited to iron, cobalt, nickel, and alloys thereof.

[0118] like Figure 4 As shown, the yoke clamp 261 has a first end 2613 a and a second end 2613 b , which are directly connected via a connecting structure 263 , so that the yoke clamp 261 forms an annular structure 261 a , which surrounds the outer periphery of the insulating cover 21 .

[0119] The yoke clamp 261 of the embodiment of the present application adopts a one-piece structure, and the first end 2613a and the second end 2613b are connected by a connecting structure 263 to form an annular structure 261a. Compared with the design of two U-shaped yoke clamps in the prior art, on the one hand, the yoke clamp 261 of the embodiment of the present application is a one-piece structure, which reduces the number of parts and thus reduces the assembly process and improves the assembly efficiency; on the other hand, the yoke clamp 261 of the embodiment of the present application is simple to process, easier to automate, and the processing efficiency is significantly improved; on the other hand, the yoke clamp 261 surrounds the outer periphery of the insulating cover 21 to form a closed protective ring, thereby improving the explosion resistance of the insulating cover 21; in addition, it can also avoid the problem of the yoke clamp 261 loosening or tipping over during the transportation process after the yoke clamp 261 and the insulating cover 21 are assembled and before being loaded into the outer shell, thereby ensuring the assembly quality of the yoke clamp 261.

[0120] Please continue reading Figure 4The connection structure 263 includes a convex portion 2631 and a concave portion 2632. The convex portion 2631 is disposed on one of the first end 2613a and the second end 2613b; the concave portion 2632 is disposed on the other of the first end 2613a and the second end 2613b; and the convex portion 2631 is confined in the concave portion 2632.

[0121] It is understandable that the convex part 2631 and the concave part 2632 can be connected by means of snap connection, plug connection, etc. Of course, in other embodiments, the convex part 2631 and the concave part 2632 can also be connected by means of mortise and tenon joints.

[0122] In the embodiment of the present application, the convex portion 2631 is a tenon 2631a, and the concave portion 2632 is a tenon groove 2632a. Further, the shape of the tenon 2631a is a dovetail shape, and the tenon groove 2632a is adapted to the shape of the tenon 2631a. Through the connection between the tenon 2631a and the tenon groove 2632a, it is more convenient to connect the first end 2613a and the second end 2613b of the yoke iron clip 261, thereby improving the assembly efficiency of the yoke iron clip 261.

[0123] like Figure 4 As shown, the yoke clamp 261 also includes a first side wall 2611, two second side walls 2612 and two third side walls 2613. The two second side walls 2612 are respectively connected to the two ends of the length direction (i.e., the first direction D1) of the first side wall 2611, and the two second side walls 2612 are arranged opposite to each other along the length direction (i.e., the first direction D1) of the first side wall 2611. Among them, the two permanent magnets 262 are respectively arranged on the two surfaces of the two second side walls 2612 facing each other. The two third side walls 2613 are respectively connected to one end of the two second side walls 2612 away from the first side wall 2611, and the two third side walls 2613 extend from the two second side walls 2612 toward the direction of approaching each other; wherein the first end 2613a and the second end 2613b are respectively formed at one end of the two third side walls 2613 away from the corresponding second side wall 2612.

[0124] It can be understood that the two third side walls 2613 form a side wall through the connection structure 263, and the side wall is arranged opposite to the first side wall 2611 along the third direction D3.

[0125] The yoke clip 261 of the embodiment of the present application can be formed into an annular structure 261a by bending a sheet and connecting two ends (a first end 2613a and a second end 2613b) of the sheet through a connecting structure 263.

[0126] It should be noted that the orthographic projection of the tenon 2631a along the third direction D3 onto the inner wall surface of the first side wall 2611 is in a dovetail shape. Similarly, the orthographic projection of the tenon groove 2632a along the third direction D3 onto the inner wall surface of the first side wall 2611 is in a dovetail shape.

[0127] like Figure 4 As shown, a reinforcement portion 267 is provided at the connection between the first side wall 2611 and the second side wall 2612 , and at the connection between the second side wall 2612 and the third side wall 2613 . The reinforcement portion 267 is protruded from the inner surface of the annular structure 261 a .

[0128] It can be understood that by providing the reinforcing portion 267 , the structural strength of the first side wall 2611 and the second side wall 2612 , and the structural strength of the second side wall 2612 and the third side wall 2613 can be improved.

[0129] In the embodiment of the present application, a plurality of reinforcing parts 267 are provided at the connection between the first side wall 2611 and the second side wall 2612, and the plurality of reinforcing parts 267 are arranged at intervals along the second direction D2. A plurality of reinforcing parts 267 are provided at the connection between the second side wall 2612 and the third side wall 2613, and the plurality of reinforcing parts 267 are arranged at intervals along the second direction D2.

[0130] like Figure 3 and Figure 4 At least one of the first side wall 2611 , the two second side walls 2612 and the two third side walls 2613 is provided with a hanging portion 264 , and the hanging portion 264 extends from the upper edge of the yoke clamp 261 to the inside of the annular structure 261 a .

[0131] By setting the hanging part 264, the yoke clamp 261 can be suspended on the top of the insulating cover 21, so that there is a gap between the yoke clamp 261 and the yoke plate 25, and the yoke clamp 261 does not contact the yoke plate 25, thereby increasing the electrical gap between the yoke clamp 261 and the yoke plate 25.

[0132] In the embodiment of the present application, two hanging portions 264 spaced apart along the first direction D1 are disposed on the upper edge of the first side wall 2611 , and one hanging portion 264 is disposed on the upper edge of each third side wall 2613 , but the present invention is not limited thereto.

[0133] Continue reading Figure 4 The two surfaces of the two second side walls 2612 facing each other are both convexly provided with limiting portions 265 , and the limiting portions 265 are used to limit the permanent magnet 262 .

[0134] In the embodiment of the present application, two limiting portions 265 are protruded from a surface of each second side wall 2612 facing the insulating cover 21 and are spaced apart along the third direction D3 , and the permanent magnet 262 is limited between the two limiting portions 265 .

[0135] A notch 266 is provided at the upper edge and / or the lower edge of the connection between the first side wall 2611 and the second side wall 2612, and a notch 266 is provided at the upper edge and / or the lower edge of the connection between the second side wall 2612 and the third side wall 2613. By providing the notch 266, discharge at the tip of the bend of the yoke clamp 261 can be prevented. At the same time, a notch 266 is provided at the lower edge of the connection between the first side wall 2611 and the second side wall 2612, and a notch 266 is provided at the lower edge of the connection between the second side wall 2612 and the third side wall 2613, and the notch 266 can also avoid the two side yoke plates 472 of the U-shaped yoke 47 from being away from one end of the bottom yoke plate 471.

[0136] It should be noted that the “upper edge” refers to the edge of the yoke clip 261 away from the yoke plate 25 , and the “lower edge” refers to the edge of the yoke clip 261 close to the yoke plate 25 .

[0137] In summary, the high voltage DC relay of the embodiment of the present application has at least the following advantages or beneficial effects:

[0138] The yoke clamp 261 of the embodiment of the present application adopts a one-piece structure, and the first end 2613a and the second end 2613b are connected to form an annular structure 261a. Compared with the design of two U-shaped yoke clamps 261 in the prior art, on the one hand, the yoke clamp 261 of the embodiment of the present application is a one-piece structure, which reduces the number of parts and thus reduces the assembly process and improves the assembly efficiency; on the other hand, the yoke clamp 261 of the embodiment of the present application is simple to process, easier to automate, and the processing efficiency is significantly improved; on the other hand, the yoke clamp 261 surrounds the outer periphery of the insulating cover 21 to form a closed protective ring, thereby improving the explosion resistance of the insulating cover 21; in addition, it can also avoid the problem of the yoke clamp 261 loosening or tipping over during the transportation process after the yoke clamp 261 and the insulating cover 21 are assembled and before being loaded into the outer shell, thereby ensuring the assembly quality of the yoke clamp 261.

[0139] Furthermore, the connection between the tenon 2631 a and the tenon groove 2632 a facilitates the connection between the first end 2613 a and the second end 2613 b of the yoke clamp 261 , thereby improving the assembly efficiency of the yoke clamp 261 .

[0140] Furthermore, by setting the hanging portion 264, the yoke clamp 261 can be suspended on the top of the insulating cover 21, so that there is a gap between the yoke clamp 261 and the yoke plate 25, and the yoke clamp 261 does not contact the yoke plate 25, thereby increasing the electrical gap between the yoke clamp 261 and the yoke plate 25.

[0141] Furthermore, by providing the notch 266, discharge can be prevented at the tip of the bend of the yoke clip 261. At the same time, a notch 266 is provided at the lower edge of the connection between the first side wall 2611 and the second side wall 2612, and a notch 266 is provided at the lower edge of the connection between the second side wall 2612 and the third side wall 2613. The notch 266 can also avoid the two side yoke plates 472 of the U-shaped yoke 47 from being away from one end of the bottom yoke plate 471.

[0142] It is understandable that the various embodiments / implementations provided in the present application can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0143] In the application embodiments, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the application embodiments can be understood according to the specific circumstances.

[0144] In the description of the application embodiments, it should be understood that the directions or positional relationships indicated by the terms "up", "down", "left", "right", "front", "back", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the application embodiments.

[0145] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the application embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0146] The above are only preferred embodiments of the application embodiments and are not intended to limit the application embodiments. For those skilled in the art, the application embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application embodiments shall be included in the protection scope of the application embodiments.

Claims

1. A high voltage DC relay, characterized in that: include: Insulation cover; as well as The yoke clamp has a first end and a second end, wherein the first end and the second end are connected so that the yoke clamp forms an annular structure, and the annular structure surrounds the outer periphery of the insulating cover.

2. The high voltage DC relay according to claim 1, characterized in that: The yoke iron clamp is a one-piece structure.

3. The high voltage DC relay according to claim 1 or 2, characterized in that: The first end and the second end are directly connected.

4. The high voltage DC relay according to claim 1, characterized in that: It also includes a permanent magnet, which is arranged between the yoke clamp and the insulating cover.

5. The high voltage DC relay according to claim 1, characterized in that: The first end and the second end are connected by a connection structure, and the connection structure includes: a convex portion disposed on one of the first end and the second end; and The concave portion is arranged on the other of the first end and the second end; the convex portion is confined in the concave portion.

6. The high voltage DC relay according to claim 5, characterized in that: The convex part is a tenon, and the concave part is a mortise.

7. The high voltage DC relay according to claim 6, characterized in that: The shape of the tenon is dovetail-shaped, and the tenon groove is adapted to the shape of the tenon.

8. The high voltage DC relay according to claim 1, characterized in that: The yoke clamp also includes: a first side wall; two second side walls, the two second side walls are respectively connected to two ends of the first side wall in the length direction, and the two second side walls are arranged opposite to each other along the length direction of the first side wall; and Two third side walls, the two third side walls are respectively connected to one end of the two second side walls away from the first side wall, and the two third side walls extend from the two second side walls towards each other; Wherein, the first end and the second end are respectively formed at one end of two third side walls away from the corresponding second side wall.

9. The high voltage DC relay according to claim 8, characterized in that: A reinforcement portion is provided at a connection between the first side wall and the second side wall, and at a connection between the second side wall and the third side wall. The reinforcement portion is protruded from the inner surface of the annular structure.

10. The high voltage DC relay according to claim 8, characterized in that: At least one of the first side wall, the two second side walls and the two third side walls is provided with a hanging portion, and the hanging portion extends from the upper edge of the yoke clamp toward the inside of the annular structure and is hung on the insulating cover.

11. The high voltage DC relay according to claim 10, characterized in that: It also includes a yoke iron plate, and the insulating cover is arranged on one side of the yoke iron plate in the thickness direction; A gap is defined between the yoke clip and the yoke plate.

12. The high voltage DC relay according to claim 8, characterized in that: Two surfaces of the two second side walls facing each other are both convexly provided with limiting parts.

13. The high voltage DC relay according to claim 8, characterized in that: An upper edge and / or a lower edge of a connection between the first side wall and the second side wall, and an upper edge and / or a lower edge of a connection between the second side wall and the third side wall are provided with a notch.

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