High-voltage direct-current relay

Abstract

The present application relates to a high-voltage direct-current relay, comprising a push rod (10), an auxiliary stationary contact member (20), and an elastic auxiliary movable contact member (30). The auxiliary movable contact member (30) is provided at a first end (11) of the push rod (10). Under the driving of the push rod (10), the auxiliary movable contact member (30) can move towards or away from the auxiliary stationary contact member (20), so that the auxiliary movable contact member (30) is in contact with or separated from the auxiliary stationary contact member (20).

Description

High voltage DC relay

[0001] Related applications

[0002] This application claims priority to Chinese patent application No. 2024231346931, filed on December 18, 2024, entitled "High Voltage DC Relay", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of relay technology, and in particular to a high-voltage DC relay. Background Technology

[0004] 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 often used in automatic control circuits, where relays play roles such as automatic adjustment, safety protection, and circuit switching.

[0005] With the development of new energy vehicles, auxiliary contact technology is commonly used to monitor and record the on / off state of relay main contacts. Auxiliary contacts include auxiliary stationary contacts and auxiliary moving contacts, with the auxiliary moving contact mounted on an auxiliary moving spring. However, common auxiliary contacts are complex to install and have low assembly efficiency. Summary of the Invention

[0006] Therefore, it is necessary to provide a high-voltage DC relay that eliminates the need for separate springs and moving contacts, thereby reducing the number of parts and improving assembly efficiency.

[0007] This application provides a high-voltage DC relay, comprising:

[0008] A push rod, the push rod being movable along its axial direction, the push rod having a first end;

[0009] Auxiliary static contact; and

[0010] An auxiliary movable contact is provided at the first end. Under the push of the push rod, the auxiliary movable contact can move towards or away from the auxiliary stationary contact so that the auxiliary movable contact can contact or separate from the auxiliary stationary contact.

[0011] In the aforementioned high-voltage DC relay, the push rod can move axially, thereby causing the auxiliary moving contact to move closer to or away from the auxiliary stationary contact, causing the auxiliary stationary contact to contact or separate from the auxiliary moving contact. When the auxiliary stationary contact contacts the auxiliary moving contact, the auxiliary stationary contact presses against the auxiliary moving contact, causing the auxiliary moving contact to deform and generate elastic force, increasing the contact pressure between the auxiliary moving and auxiliary stationary contacts. This allows the auxiliary stationary contact to make better contact with the auxiliary moving contact, ensuring a better electrical connection between them. Simultaneously, the elastic force of the auxiliary moving contact provides a reaction force for the separation of the auxiliary stationary and auxiliary moving contacts. Due to the elasticity of the auxiliary moving contact, it also acts as a buffer during the contact process with the auxiliary stationary contact, preventing damage to both auxiliary stationary and auxiliary moving contacts and extending their service life. Furthermore, it eliminates the need for separate springs and moving contact plates, reducing assembly complexity and improving assembly efficiency. In addition, connecting the auxiliary moving contact to the push rod can reduce the size chain, improve verticality, and prevent the auxiliary moving contact from tilting.

[0012] In one embodiment, the auxiliary moving contact includes a first elastic arm and a second elastic arm. The second elastic arm is disposed on the side of the first elastic arm facing the auxiliary stationary contact. The first elastic arm has a first through hole and is sleeved on the first end through the first through hole. The second elastic arm has a second through hole and is sleeved on the first end through the second through hole. When the auxiliary stationary contact contacts the auxiliary moving contact, the second elastic arm deforms under the pressure of the auxiliary stationary contact to generate elastic force, thereby increasing the contact pressure between the auxiliary stationary contact and the auxiliary moving contact. This allows the auxiliary stationary contact to make better contact with the second elastic arm, ensuring a better electrical connection between the auxiliary stationary contact and the auxiliary moving contact. At the same time, the elastic force of the second elastic arm provides a reaction force for the separation of the auxiliary stationary contact and the auxiliary moving contact.

[0013] In one embodiment, the first elastic arm and the second elastic arm are arranged at an angle, and the first elastic arm and the second elastic arm are connected to form a V-shape. This simplifies the processing and improves processing efficiency.

[0014] In one embodiment, one end of the second elastic arm along its length is connected to the first elastic arm, and the second through hole is a strip-shaped hole extending along the length of the second elastic arm. Thus, the strip-shaped hole allows space for the movement of the auxiliary moving contact, preventing interference with the movement of the second elastic arm. Furthermore, the strip-shaped hole, in conjunction with the push rod, provides a guiding function, ensuring the directional movement of the second elastic arm and guaranteeing the stability of the contact between the auxiliary stationary contact and the auxiliary moving contact.

[0015] In one embodiment, the first end is provided with a first limiting structure and a second limiting structure. The first limiting structure is located on the side of the auxiliary movable contact away from the auxiliary stationary contact, and the second limiting structure is located on the side of the auxiliary movable contact close to the auxiliary stationary contact. The first limiting structure and the second limiting structure cooperate to position the auxiliary movable contact at the first end. Thus, with the cooperation of the first limiting structure and the second limiting structure, the auxiliary movable contact is limited to the first end of the push rod, ensuring that the auxiliary movable contact can contact the auxiliary stationary contact while preventing the auxiliary movable contact from separating from the push rod.

[0016] In one embodiment, the first limiting structure includes a first limiting step, which has a first step surface and a second step surface. The first step surface extends axially along the push rod, and the second step surface faces the auxiliary stationary contact. The wall of the first through hole is adapted to the first step surface, and the side of the first elastic arm away from the second elastic arm abuts against the second step surface. Thus, the first step surface provides an installation position for the auxiliary moving contact, facilitating its installation. Simultaneously, the side of the first elastic arm away from the second elastic arm abuts against the second step surface, which acts as a limiting element, restricting the first elastic arm from moving away from the push rod relative to the auxiliary stationary contact, ensuring the reliability of the auxiliary moving contact's installation.

[0017] In one embodiment, the second limiting structure includes a limiting member with a third through hole. The limiting member is sleeved onto the first end through the third through hole, and the limiting member is fixedly connected to the first end. Thus, the limiting member restricts the movement of the auxiliary moving contact towards the auxiliary stationary contact, preventing the auxiliary moving contact from detaching from the first end of the push rod. Furthermore, under the action of the limiting member, the auxiliary moving contact has a certain pre-compression force.

[0018] In one embodiment, the first end is further provided with a second limiting step, which has a third step surface and a fourth step surface. The third step surface extends axially along the push rod, and the fourth step surface faces the auxiliary stationary contact. The wall of the second through hole is adapted to the third step surface, and the side of the limiting member away from the auxiliary stationary contact abuts against the fourth step surface. Thus, the third step surface provides an installation position for the limiting member, facilitating its installation. Simultaneously, the side of the limiting member away from the auxiliary stationary contact abuts against the fourth step surface, which acts as a limiting element, preventing the limiting member from moving away from the auxiliary stationary contact relative to the push rod, ensuring the reliability of the limiting member's installation.

[0019] In one embodiment, at least two auxiliary stationary contacts are provided, and the auxiliary moving contact can contact all of the auxiliary stationary contacts when pushed by the push rod.

[0020] In one embodiment, the push rod has a second end, the first end is disposed opposite to the second end, and the auxiliary stationary contact is disposed on the side of the auxiliary moving contact away from the second end.

[0021] In one embodiment, the high-voltage DC relay further includes a metal cover with a receiving cavity and a through hole. The receiving cavity communicates with the through hole. The first end and the auxiliary moving contact are movably disposed within the receiving cavity. One end of the auxiliary stationary contact is disposed outside the metal cover, and the other end of the auxiliary stationary contact is disposed within the receiving cavity via the through hole. Thus, the through hole serves to allow space, ensuring that one end of the auxiliary stationary contact can extend into the metal cover, thus ensuring a sealed product.

[0022] In one embodiment, the through hole is located on one end face of the metal cover along the axial direction of the push rod and close to the first end.

[0023] In one embodiment, the high-voltage DC relay further includes an insulating component, through which the auxiliary stationary contact is insulated from the metal cover. Thus, by providing the insulating component, direct conductivity between the auxiliary stationary contact and the metal cover can be prevented.

[0024] In one embodiment, the high-voltage DC relay further includes a mounting bracket and an auxiliary lead-out member. The mounting bracket is disposed on the side of the auxiliary stationary contact opposite to the push rod, and the auxiliary lead-out member is disposed on the mounting bracket and electrically connected to the auxiliary stationary contact. Thus, the auxiliary stationary contact can be led out through the auxiliary lead-out member.

[0025] In one embodiment, the push rod further has a second end, with the first end and the second end disposed opposite each other. The high-voltage DC relay also includes a main stationary contact and an active contact. The active contact is connected to the second end. Under the push of the push rod, the active contact can contact or separate from the main stationary contact. Thus, the push rod can drive the active contact and the auxiliary moving contact to move synchronously, causing the main switch assembly and the auxiliary switch assembly to alternately turn on and off.

[0026] In one embodiment, the high-voltage DC relay further includes a coil frame, a moving iron core, an insulating cover, and a yoke plate. The coil frame is wound with a coil and has an inner hole. The moving iron core and the first end are movably disposed in the inner hole. The push rod is fixedly connected to the moving iron core. The yoke plate is disposed on the side of the coil frame away from the auxiliary stationary contact. The yoke plate has an insertion hole through which the push rod passes and can move axially within the insertion hole. The insulating cover is disposed on the side of the yoke plate away from the coil frame. The active contact is disposed inside the insulating cover, and the main stationary contact is disposed on the side of the insulating cover away from the yoke plate. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0028] Figure 1 is a front view of a portion of the structure of a high-voltage DC relay according to an embodiment of this application.

[0029] Figure 2 is a cross-sectional view along AA in Figure 1.

[0030] Figure 3 is a magnified view of part A in Figure 2.

[0031] Figure 4 is an exploded view of part of the structure of the high-voltage DC relay shown in Figure 1.

[0032] Figure 5 is a cross-sectional view of a high-voltage DC relay according to an embodiment of this application in the auxiliary switching assembly in the on state.

[0033] Figure 6 is a magnified view of part B in Figure 5.

[0034] Figure 7 is a cross-sectional view of a high-voltage DC relay according to an embodiment of this application with the auxiliary switching assembly in the open state.

[0035] Figure 8 is a magnified view of part C in Figure 7.

[0036] Reference numerals in the attached diagram: 10. Push rod; 11. First end; 111. First limiting step; 1111. First step surface; 1112. Second step surface; 112. Second limiting step; 1121. Third step surface; 1122. Fourth step surface; 12. Second end; 13. Washer; 20. Auxiliary stationary contact; 30. Auxiliary moving contact; 31. First elastic arm; 311. First through hole; 32. Second elastic arm; 321. Second through hole; 40. Limiting element; 41. Third through hole; 50. Moving iron. Core; 51. Static iron core; 52. Elastic reset component; 53. Groove; 60. Metal cover; 61. Receiving cavity; 62. Through hole; 70. Metal part; 71. Through hole; 80. Insulating component; 81. Mounting hole; 90. Fixing bracket; 91. Auxiliary lead-out component; 100. Outer shell; 200. Main static contact; 300. Active contact; 400. Coil frame; 410. Inner hole; 500. Yoke plate; 510. Insertion hole; 600. Insulating cover; 700. Frame plate; 800. Contact bracket. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] Referring to Figures 5 and 7, this application provides a high-voltage DC relay, including a housing 100, a push rod 10, and an auxiliary switching assembly. The push rod 10 and the auxiliary switching assembly are both housed within the housing 100.

[0039] Referring to Figures 1 and 2, the auxiliary switch assembly includes an auxiliary stationary contact 20 and an auxiliary moving contact 30. Referring to Figures 2, 6, and 8, the push rod 10 has a first end 11 and a second end 12, which are the two ends of the push rod 10 along its axial direction. The auxiliary moving contact 30 is elastic and is located at the first end 11. Driven by the push rod 10, the auxiliary moving contact 30 can move towards or away from the auxiliary stationary contact 20, so that the auxiliary stationary contact 20 contacts or separates from the auxiliary moving contact 30.

[0040] In one embodiment, the auxiliary stationary contact 20 is provided with an auxiliary stationary contact, and the auxiliary moving contact 30 is provided with an auxiliary moving contact. The auxiliary stationary contact and the auxiliary moving contact are in contact or separated.

[0041] It should be noted that the auxiliary stationary contact 20 is integrated with the auxiliary stationary contact, or the auxiliary stationary contact 20 and the auxiliary stationary contact are separate components connected together. The auxiliary moving contact 30 is integrated with the auxiliary moving contact, or the auxiliary moving contact 30 and the auxiliary moving contact are separate components connected together.

[0042] Optionally, referring to Figure 3, the auxiliary stationary contact 20 is located on the side of the auxiliary moving contact 30 away from the second end 12.

[0043] Of course, in other embodiments, a portion of the auxiliary stationary contact 20 is disposed on the side of the auxiliary moving contact 30 away from the second end 12, and the other portion of the auxiliary stationary contact 20 is disposed corresponding to the auxiliary moving contact.

[0044] In the aforementioned high-voltage DC relay, the push rod 10 can move along its axial direction, thereby driving the auxiliary moving contact 30 to move closer to or further away from the auxiliary stationary contact 20, causing the auxiliary stationary contact 20 to contact or separate from the auxiliary moving contact 30, thus realizing the switching of the auxiliary switching assembly. When the auxiliary stationary contact 20 contacts the auxiliary moving contact 30, the auxiliary stationary contact 20 presses against the auxiliary moving contact 30, causing the auxiliary moving contact 30 to deform and generate elastic force, thereby increasing the contact pressure between the auxiliary moving contact 30 and the auxiliary stationary contact 20. In this way, the auxiliary stationary contact 20 can make better contact with the auxiliary moving contact 30, ensuring a better electrical connection between the auxiliary stationary contact 20 and the auxiliary moving contact 30. At the same time, the elastic force of the auxiliary moving contact 30 provides a reaction force for the separation of the auxiliary stationary contact 20 and the auxiliary moving contact 30. Because the auxiliary moving contact 30 is elastic, it also acts as a buffer during contact with the auxiliary stationary contact 20, preventing damage to both and extending their service life. Furthermore, the auxiliary moving contact 30 alone can control the switching of the auxiliary switch assembly, eliminating the need for separate springs and moving contact pieces, thus reducing assembly complexity and improving efficiency. Additionally, connecting the auxiliary moving contact 30 to the push rod 10 reduces the size of the chain, improves verticality, and prevents tilting.

[0045] In one embodiment, referring to Figures 5 and 7, the high-voltage DC relay further includes a main switching assembly. The main switching assembly includes a main stationary contact 200 and an active contact 300. The main stationary contact 200 is located on the side of the second end 12 of the push rod 10 opposite to the first end 11. The active contact 300 is connected to the second end 12 of the push rod 10 via a contact bracket 800. Since both the active contact 300 and the auxiliary moving contact 30 are connected to the push rod 10, the push rod 10 can drive the active contact 300 and the auxiliary moving contact 30 to move synchronously, causing the main switching assembly and the auxiliary switching assembly to alternately connect and disconnect. Specifically, when the main stationary contact 200 contacts the active contact 300, the auxiliary stationary contact 20 separates from the auxiliary moving contact 30; when the main stationary contact 200 separates from the active contact 300, the auxiliary stationary contact 20 contacts the auxiliary moving contact 30.

[0046] In one embodiment, referring to Figures 5 and 7, the high-voltage DC relay further includes a coil frame 400, a yoke plate 500, and an insulating cover 600. A coil is wound around the coil frame 400, which has an inner hole 410. The first end 11 of the push rod 10 is movably disposed within the inner hole 410. The yoke plate 500 is located on the side of the coil frame 400 opposite to the auxiliary stationary contact 20. The yoke plate 500 has a socket 510 through which the push rod 10 passes and can move axially within the socket 510. The insulating cover 600 is located on the side of the yoke plate 500 opposite to the coil frame 400 and is spaced apart from the yoke plate 500. A frame 700 is provided between the yoke plate 500 and the insulating cover 600, and the yoke plate 500 is connected to the insulating cover 600 via the frame 700. The main stationary contact 200 is located on the side of the insulating cover 600 away from the yoke plate 500, and the active contact 300 is located inside the insulating cover 600.

[0047] Further, referring to Figures 5 and 7, the high-voltage DC relay also includes a metal cover 60 and a moving iron core 50. The metal cover 60 is located within the inner hole 410 and has a receiving cavity 61 and a through hole 62 communicating with the receiving cavity 61. The first end 11 of the push rod 10, the auxiliary moving contact 30, and the moving iron core 50 are all movably disposed within the receiving cavity 61, and the moving iron core 50 is fixedly connected to the push rod 10. The auxiliary stationary contact 20 is at least partially disposed within the metal cover 60. Optionally, one end of the auxiliary stationary contact 20 is located within the receiving cavity 61, and the other end is located outside the metal cover 60. Thus, the through hole 62 provides clearance, ensuring that one end of the auxiliary stationary contact 20 can extend into the metal cover 60, ensuring the product can be sealed. It should be noted that when the product does not require sealing, the metal cover 60 may be omitted.

[0048] In this embodiment, the through hole 62 is provided on one end face of the metal cover 60 along the axial direction of the push rod 10 and close to the first end 11. Taking Figure 2 as an example, the through hole 62 is provided at the bottom of the metal cover 60.

[0049] When the coil is not energized, the main stationary contact 200 separates from the active contact 300, meaning the main switch assembly is in the off state. Simultaneously, the auxiliary stationary contact 20 contacts the auxiliary moving contact 30, meaning the auxiliary switch assembly is in the on state. When the coil is energized, the moving iron core 50 moves axially away from the auxiliary stationary contact 20 under the influence of the magnetic field, thereby driving the push rod 10 to move synchronously. This causes the main stationary contact 200 to contact the active contact 300, turning on the main switch assembly. Simultaneously, the auxiliary stationary contact 20 separates from the auxiliary moving contact 30, turning off the auxiliary switch assembly. Thus, the magnetic field generated when the coil is energized provides power for the movement of the moving iron core 50 and the push rod 10.

[0050] Specifically, referring to Figure 2, the end face of the moving iron core 50 facing away from the second end 12 is provided with a groove 53. In this embodiment, by connecting the auxiliary moving contact 30 to the push rod 10, when glue is applied at the groove 53 to fix the push rod 10 and the moving iron core 50, the auxiliary moving contact 30 will not block the groove 53, making it convenient to apply glue at the groove 53.

[0051] In one embodiment, referring to Figures 5 and 7, the high-voltage DC relay further includes a stationary magnetic conductor and a resilient reset member 52. The stationary magnetic conductor is located on the side of the moving iron core 50 facing away from the auxiliary stationary contact 20. The resilient reset member 52 is located inside the metal cover 60, with one end connected to the stationary magnetic conductor and the other end connected to the moving iron core 50. The resilient reset member 52 is capable of extending and retracting along the axial direction of the push rod 10. Optionally, the resilient reset member 52 is a reset spring, which is sleeved on the push rod 10.

[0052] When the coil is energized, the moving iron core 50 moves away from the auxiliary stationary contact 20 under the action of the magnetic field force, and the elastic reset member 52 is gradually compressed. When the coil is de-energized, the moving iron core 50 moves towards the auxiliary stationary contact 20 under the restoring force of the elastic reset member 52 to reset the moving iron core 50.

[0053] Optionally, the static magnetic conductor is a yoke plate 500, which is located on the side of the metal cover 60 away from the auxiliary static contact 20. The yoke plate 500 cooperates with the moving iron core 50 to achieve magnetic conduction.

[0054] Optionally, the static magnetic conductor is a static iron core 51, which is located inside the metal cover 60 and fixedly connected to the yoke plate 500. The static iron core 51 cooperates with the moving iron core 50 to achieve magnetic conduction.

[0055] In one embodiment, referring to Figures 2 and 3, the auxiliary moving contact 30 includes a first elastic arm 31 and a second elastic arm 32. The second elastic arm 32 is disposed on the side of the first elastic arm 31 facing the auxiliary stationary contact 20. The first elastic arm 31 has a first through hole 311, through which it is sleeved onto the first end 11 of the push rod 10. The second elastic arm 32 has a second through hole 321, through which it is sleeved onto the first end 11 of the push rod 10.

[0056] It should be noted that the first elastic arm 31 and the second elastic arm 32 are sleeved on the first end 11 of the push rod 10, rather than fixed to the first end 11 of the push rod 10. This can prevent the auxiliary moving contact 30 from breaking due to excessive stress.

[0057] Driven by the push rod 10, the auxiliary moving contact 30 moves towards the auxiliary stationary contact 20, and the auxiliary stationary contact 20 comes into contact with the second elastic arm 32. During the contact process, the second elastic arm 32 deforms under the pressure of the auxiliary stationary contact 20, generating elastic force to increase the contact pressure between the auxiliary stationary contact 20 and the auxiliary moving contact 30. This allows the auxiliary stationary contact 20 to make better contact with the second elastic arm 32, ensuring a better electrical connection between the auxiliary stationary contact 20 and the auxiliary moving contact 30. At the same time, the elastic force of the second elastic arm 32 provides a reaction force for the separation of the auxiliary stationary contact 20 and the auxiliary moving contact 30.

[0058] Optionally, referring to Figure 3, the first elastic arm 31 and the second elastic arm 32 are arranged at an angle, and the first elastic arm 31 and the second elastic arm 32 are connected to form a V-shape. Specifically, the V-shaped auxiliary moving contact 30 can be obtained by bending the spring sheet, which simplifies the processing and improves the processing efficiency.

[0059] In this embodiment, referring to Figure 3, the first elastic arm 31 is perpendicular to the axis of the push rod 10. Taking Figure 3 as an example, the first elastic arm 31 is horizontally arranged. One end of the second elastic arm 32 in the length direction is connected to the first elastic arm 31, and the other end of the second elastic arm 32 in the length direction is inclined towards the auxiliary stationary contact 20.

[0060] Of course, in other embodiments, the auxiliary movable contact 30 is U-shaped. Alternatively, the auxiliary movable contact 30 is W-shaped. Or, the auxiliary movable contact 30 is dome-shaped.

[0061] Furthermore, the connection between the first elastic arm 31 and the second elastic arm 32 adopts a rounded transition. This increases the toughness and fatigue resistance of the auxiliary moving contact 30.

[0062] In one embodiment, referring to Figure 3, the second through hole 321 is a strip-shaped hole extending along the length of the second elastic arm 32, with the first end 11 of the push rod 10 disposed within the strip-shaped hole. Since the second elastic arm 32 is inclined from the first elastic arm 31 towards the auxiliary stationary contact 20, its movement is not linear when the auxiliary stationary contact 20 contacts the auxiliary moving contact 30. Therefore, the second through hole 321 is designed as a strip-shaped hole, which allows the movement of the auxiliary moving contact 30 to be cleared, preventing interference with the movement of the second elastic arm 32. Furthermore, the strip-shaped hole, in conjunction with the push rod 10, provides a guiding function, ensuring the directional movement of the second elastic arm 32 and guaranteeing the stability of the contact between the auxiliary stationary contact 20 and the auxiliary moving contact 30.

[0063] In one embodiment, the first end 11 is provided with a first limiting structure and a second limiting structure. The first limiting structure is provided on the side of the auxiliary moving contact 30 away from the auxiliary stationary contact 20, and the second limiting structure is provided on the side of the auxiliary moving contact 30 close to the auxiliary stationary contact 20. The first limiting structure and the second limiting structure cooperate to position the auxiliary moving contact 30 on the first end 11. Since the auxiliary movable contact 30 is sleeved on the first end 11 of the push rod 10, a first limiting structure and a second limiting structure are provided on the first end 11 of the push rod 10. The auxiliary movable contact 30 is located between the first limiting structure and the second limiting structure. The first limiting structure restricts the movement of the auxiliary movable contact 30 away from the auxiliary stationary contact 20, and the second limiting structure restricts the movement of the auxiliary movable contact 30 towards the auxiliary stationary contact 20. In this way, with the cooperation of the first limiting structure and the second limiting structure, the auxiliary movable contact 30 is limited to the first end 11 of the push rod 10, ensuring that the auxiliary movable contact 30 can contact the auxiliary stationary contact 20, while preventing the auxiliary movable contact 30 from separating from the push rod 10.

[0064] In one embodiment, referring to Figures 3 and 4, the first limiting structure includes a first limiting step 111. The first limiting step 111 has a first step surface 1111 and a second step surface 1112. The first step surface 1111 extends axially along the push rod 10, and the second step surface 1112 faces the auxiliary stationary contact 20. The first step surface 1111 and the second step surface 1112 are perpendicular. The wall of the first through hole 311 is adapted to the first step surface 1111, and the side of the first elastic arm 31 facing away from the second elastic arm 32 abuts against the second step surface 1112. During installation, the auxiliary moving contact 30 is sleeved on the first step surface 1111, and the first step surface 1111 provides an installation position for the auxiliary moving contact 30, facilitating its installation. Meanwhile, the side of the first elastic arm 31 away from the second elastic arm 32 abuts against the second step surface 1112. The second step surface 1112 can play a limiting role. The second step surface 1112 can restrict the first elastic arm 31 from moving away from the auxiliary stationary contact 20 relative to the push rod 10, thus ensuring the reliability of the installation of the auxiliary moving contact 30.

[0065] Furthermore, referring to Figures 4 and 6, the high-voltage DC relay also includes a gasket 13. The gasket 13 is fitted onto the first end 11, and its diameter is larger than the diameter of the second stepped surface 1112. The gasket 13 has a hole in its center, which mates with the first stepped surface 1111. The gasket 13 is positioned between the auxiliary moving contact 30 and the second stepped surface 1112, and contacts both the auxiliary moving contact 30 and the second stepped surface 1112. This increases the mating area between the auxiliary moving contact 30 and the second stepped surface 1112.

[0066] In one embodiment, referring to FIG3, the second limiting structure includes a limiting member 40. The limiting member 40 has a third through hole 41, and the limiting member 40 is sleeved on the first end 11 of the push rod 10 through the third through hole 41, and the limiting member 40 is fixedly connected to the push rod 10. In this way, the limiting member 40 restricts the movement of the auxiliary moving contact 30 toward the auxiliary stationary contact 20, preventing the auxiliary moving contact 30 from disengaging from the first end 11 of the push rod 10. In addition, under the action of the limiting member 40, the auxiliary moving contact 30 has a certain pre-compression force.

[0067] It should be noted that there are several ways to fix the limiting member 40 to the push rod 10. Optionally, the wall of the third through hole 41 is engaged with the push rod 10; or, the wall of the third through hole 41 is welded to the push rod 10; or, the limiting member 40 is riveted to the push rod 10.

[0068] In one embodiment, referring to Figures 3 and 4, the first end 11 is further provided with a second limiting step 112. The second limiting step 112 has a third step surface 1121 and a fourth step surface 1122. The third step surface 1121 extends axially along the push rod 10, and the fourth step surface 1122 faces the auxiliary stationary contact member 20. The third step surface 1121 and the fourth step surface 1122 are perpendicular. The wall of the third through hole 41 is adapted to the third step surface 1121, and the side of the limiting member 40 facing away from the auxiliary stationary contact member 20 abuts against the fourth step surface 1122. During installation, the limiting member 40 is sleeved on the third step surface 1121, and the third step surface 1121 provides an installation position for the limiting member 40, facilitating the installation of the limiting member 40. Meanwhile, the side of the limiting member 40 away from the auxiliary stationary contact member 20 abuts against the fourth step surface 1122. The fourth step surface 1122 plays a limiting role, preventing the limiting member 40 from moving away from the auxiliary stationary contact member 20 relative to the push rod 10, thus ensuring the reliability of the installation of the limiting member 40.

[0069] In one embodiment, referring to Figures 3 and 6, there are two auxiliary stationary contacts 20. Under the push of the push rod 10, the auxiliary moving contact 30 can contact or separate from the two auxiliary stationary contacts 20.

[0070] In this embodiment, when the auxiliary stationary contact 20 contacts the auxiliary moving contact 30, the two auxiliary stationary contacts 20 respectively contact the portions of the second elastic arm 32 located on both sides of the extension direction of the strip hole.

[0071] In one embodiment, the auxiliary switch assembly further includes an insulator 80. The auxiliary stationary contact 20 is insulated from the metal cover 60 via the insulator 80. Thus, the insulator 80 provides insulation, preventing direct conductivity between the auxiliary stationary contact 20 and the metal cover 60.

[0072] In one embodiment, referring to Figures 1, 6, and 8, the insulating member 80 is a ceramic member. The ceramic member is disposed outside the metal cover 60 and located on the side of the first end 11 opposite to the second end 12. The ceramic member has a mounting hole 81 communicating with the through hole 62, and the auxiliary stationary contact 20 is disposed within the mounting hole 81. Thus, the ceramic member provides a mounting position for the auxiliary stationary contact 20, facilitating its installation, while also serving as insulation.

[0073] In this embodiment, referring to Figures 6 and 8, there are two mounting holes 81, and the two auxiliary stationary contacts 20 are respectively provided in the two mounting holes 81.

[0074] Further, referring to Figures 1, 6, and 8, the auxiliary switch assembly also includes a metal component 70. The metal component 70 is disposed between the metal cover 60 and the ceramic component, and the metal component 70 and the ceramic component integrally cover the through hole 62. The metal component 70 is welded to the metal cover 60. The metal component 70 has an axially extending through hole 71, which communicates with the mounting hole 81 and the through hole 62. One end of the auxiliary stationary contact 20 is located outside the metal cover 60, and the other end of the auxiliary stationary contact 20 is located within the receiving cavity 61 via the mounting hole 81, the through hole 71, and the through hole 62. Thus, the auxiliary stationary contact 20 is fixed to the metal cover 60 by welding. Furthermore, the integral structure formed by the metal component 70 and the ceramic component can seal the through hole 62, thereby sealing the metal cover 60.

[0075] In another embodiment, the insulating member 80 includes a glass body. The glass body is disposed within the through-hole 62 to cover the through-hole 62, and the auxiliary stationary contact 20 is connected to the metal cover 60 via the glass body. It is understood that the auxiliary stationary contact 20, the glass body, and the metal cover 60 are sintered together within the through-hole 62; that is, one end of the auxiliary stationary contact 20 is located outside the receiving cavity 61, and the other end of the auxiliary stationary contact 20 is located outside the receiving cavity 61. This simplifies the parts and improves assembly efficiency. Furthermore, the glass body can seal the through-hole 62 to seal the metal cover 60.

[0076] In one embodiment, referring to Figures 2 and 4, the high-voltage DC relay further includes a mounting bracket 90 and an auxiliary lead-out member 91. The mounting bracket 90 is located on the side of the auxiliary stationary contact 20 facing away from the metal cover 60, and the auxiliary lead-out member 91 is located on the mounting bracket 90 and arranged in a direction perpendicular to the axis of the push rod 10. The auxiliary lead-out member 91 is electrically connected to the auxiliary stationary contact 20. Thus, the auxiliary lead-out member 91 can be led out from the side.

[0077] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0078] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0079] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0080] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0081] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0082] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0083] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A high-voltage DC relay, characterized in that, include: A push rod, the push rod being movable along its axial direction, the push rod having a first end; Auxiliary static contact; as well as An auxiliary movable contact is provided at the first end. Under the push of the push rod, the auxiliary movable contact can move towards or away from the auxiliary stationary contact so that the auxiliary movable contact can contact or separate from the auxiliary stationary contact.

2. The high-voltage DC relay according to claim 1, characterized in that, The auxiliary moving contact includes a first elastic arm and a second elastic arm. The second elastic arm is disposed on the side of the first elastic arm facing the auxiliary stationary contact. The first elastic arm has a first through hole and is sleeved on the first end through the first through hole. The second elastic arm has a second through hole and is sleeved on the first end through the second through hole.

3. The high-voltage DC relay according to claim 2, characterized in that, The first elastic arm and the second elastic arm are set at an angle, and the first elastic arm and the second elastic arm are connected to form a V shape.

4. The high-voltage DC relay according to claim 2, characterized in that, One end of the second elastic arm along its length is connected to the first elastic arm, and the second through hole is a strip-shaped hole that extends along the length of the second elastic arm.

5. The high-voltage DC relay according to claim 2, characterized in that, The first end is provided with a first limiting structure and a second limiting structure. The first limiting structure is located on the side of the auxiliary moving contact away from the auxiliary stationary contact, and the second limiting structure is located on the side of the auxiliary moving contact close to the auxiliary stationary contact. The first limiting structure and the second limiting structure cooperate to place the auxiliary moving contact at the first end.

6. The high-voltage DC relay according to claim 5, characterized in that, The first limiting structure includes a first limiting step, which has a first step surface and a second step surface. The first step surface extends along the axial direction of the push rod, and the second step surface faces the auxiliary stationary contact. The wall of the first through hole is adapted to the first step surface, and the side of the first elastic arm away from the second elastic arm abuts against the second step surface.

7. The high-voltage DC relay according to claim 5, characterized in that, The second limiting structure includes a limiting member, which has a third through hole. The limiting member is sleeved on the first end through the third through hole, and the limiting member is fixedly connected to the first end.

8. The high-voltage DC relay according to claim 7, characterized in that, The first end is also provided with a second limiting step, the second limiting step having a third step surface and a fourth step surface, the third step surface extending along the axial direction of the push rod, the fourth step surface facing the auxiliary stationary contact, the hole wall of the second through hole being adapted to the third step surface, and the side of the limiting member away from the auxiliary stationary contact abutting against the fourth step surface.

9. The high-voltage DC relay according to claim 1, characterized in that, The auxiliary stationary contact is provided with at least two parts, and under the push of the push rod, the auxiliary moving contact can contact all of the auxiliary stationary contact parts.

10. The high-voltage DC relay according to any one of claims 1 to 9, characterized in that, The push rod has a second end, the first end and the second end are disposed opposite each other, and the auxiliary stationary contact is disposed on the side of the auxiliary moving contact away from the second end.

11. The high-voltage DC relay according to any one of claims 1 to 9, characterized in that, The high-voltage DC relay also includes a metal cover, which has a receiving cavity and a through hole. The receiving cavity is connected to the through hole. The first end and the auxiliary moving contact are movably disposed in the receiving cavity. One end of the auxiliary stationary contact is disposed outside the metal cover, and the other end of the auxiliary stationary contact is disposed in the receiving cavity through the through hole.

12. The high-voltage DC relay according to claim 11, characterized in that, The through hole is located on one end face of the metal cover along the axial direction of the push rod and close to the first end.

13. The high-voltage DC relay according to claim 11, characterized in that, The high-voltage DC relay also includes an insulating component, and the auxiliary stationary contact is insulated from the metal cover through the insulating component.

14. The high-voltage DC relay according to any one of claims 1 to 9, characterized in that, The high-voltage DC relay also includes a mounting bracket and an auxiliary lead-out component. The mounting bracket is located on the side of the auxiliary stationary contact opposite to the push rod, and the auxiliary lead-out component is located on the mounting bracket. The auxiliary lead-out component is electrically connected to the auxiliary stationary contact.

15. The high-voltage DC relay according to any one of claims 1 to 9, characterized in that, The push rod also has a second end, with the first end and the second end being disposed opposite to each other. The high-voltage DC relay also includes a main stationary contact and an active contact. The active contact is connected to the second end. Under the push of the push rod, the active contact can contact or separate from the main stationary contact.

16. The high-voltage DC relay according to claim 15, characterized in that, The high-voltage DC relay further includes a coil frame, a moving iron core, an insulating cover, and a yoke plate. The coil frame is wound with a coil and has an inner hole. The moving iron core and the first end are movably disposed in the inner hole. The push rod is fixedly connected to the moving iron core. The yoke plate is disposed on the side of the coil frame away from the auxiliary stationary contact. The yoke plate has an insertion hole through which the push rod passes and can move axially within the insertion hole. The insulating cover is disposed on the side of the yoke plate away from the coil frame. The active contact is disposed inside the insulating cover, and the main stationary contact is disposed on the side of the insulating cover away from the yoke plate.

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