High-voltage direct-current relay

Abstract

The utility model relates to a high-voltage direct-current relay. The high-voltage direct-current relay comprises a push rod, an auxiliary static contact and an elastic auxiliary movable contact. The push rod is provided with a first end, the auxiliary moving contact comprises a cover body, and the cover body is arranged at the first end. Under the driving of the push rod, the auxiliary moving contact piece can move in the direction close to or away from the auxiliary static contact piece, so that the auxiliary static contact piece is in contact with or separated from the auxiliary moving contact piece. When the auxiliary static contact piece is contacted with the auxiliary moving contact piece, the auxiliary static contact piece is pressed against the auxiliary moving contact piece, so that the auxiliary moving contact piece is deformed to generate elastic force, and the contact pressure between the auxiliary moving contact piece and the auxiliary static contact piece is increased, so that the auxiliary static contact piece can be better contacted with the auxiliary moving contact piece; and meanwhile, the elastic force of the auxiliary moving contact provides counter force for the separation of the auxiliary static contact and the auxiliary moving contact. Moreover, there is no need to independently arrange a spring, a moving contact and other parts, thereby reducing the assembly of parts, and improving the assembly efficiency. The auxiliary moving contact is connected to the push rod, so that the perpendicularity is better, and the auxiliary moving contact is prevented from inclining.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a high-voltage DC relay. Background Technology

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

[0003] 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. Utility Model Content

[0004] 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 to be assembled and improving assembly efficiency.

[0005] This application provides a high-voltage DC relay, comprising:

[0006] A push rod, the push rod being movable along its axial direction, the push rod having a first end;

[0007] Auxiliary static contact; and

[0008] An auxiliary movable contact is provided, which is elastic and includes a cover located at the first end. Under the drive of the push rod, the auxiliary movable contact can move toward or away from the auxiliary stationary contact, so that the auxiliary stationary contact can contact or separate from the auxiliary movable contact.

[0009] In the aforementioned high-voltage DC relay, when the auxiliary stationary contact comes into contact with 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. This increases the contact pressure between the auxiliary moving and auxiliary stationary contacts, ensuring better contact and electrical connection. Simultaneously, the elastic force of the auxiliary moving contact provides a reaction force for separation between the two contacts. Due to its elasticity, the auxiliary moving contact also acts as a buffer during contact with the auxiliary stationary contact, preventing damage to both and extending their service life. Furthermore, it eliminates the need for separate springs and moving contact plates, reducing assembly complexity and improving efficiency. Connecting the auxiliary moving contact to the push rod reduces the size of the chain, improves verticality, and prevents tilting of the auxiliary moving contact. Furthermore, since the auxiliary moving contact includes a cover, i.e., the auxiliary moving contact is cover-shaped, the entire ring of the cover-shaped auxiliary moving contact can contact the auxiliary stationary contact. Even if there are assembly errors in the auxiliary moving contact, the reliability of the contact between the auxiliary stationary contact and the auxiliary moving contact can be guaranteed.

[0010] In one embodiment, the cover has a receiving cavity and a first opening communicating with the receiving cavity, and the cover is fitted onto the first end through the first opening. This facilitates the installation of the auxiliary moving contact and improves installation efficiency.

[0011] In one embodiment, the push rod further has a second end opposite to the first end, and the first opening is located on the side of the cover facing the second end; the cover also has a second opening communicating with the receiving cavity, and the second opening is located on the side of the cover away from the second end. Thus, the second opening serves to make way for the space.

[0012] In one embodiment, the auxiliary stationary contact member contacts or separates from the inner wall of the cover through the second opening. Thus, the entire circumference of the inner wall of the cover can contact the auxiliary stationary contact member, ensuring reliable contact between the auxiliary stationary and auxiliary moving contact members even if there are assembly errors in the auxiliary moving contact member.

[0013] In one embodiment, the auxiliary moving contact further includes a flange extending outward from the wall of the second opening toward the receiving cavity, or extending inward from the wall of the second opening toward the receiving cavity. Under the push of the push rod, the auxiliary stationary contact contacts or separates from the flange. Thus, any position in the circumferential direction of the flange can contact the auxiliary stationary contact, ensuring reliable contact between the auxiliary stationary contact and the auxiliary moving contact even if there are assembly errors in the auxiliary moving contact.

[0014] In one embodiment, the auxiliary stationary contact is in contact with or separates from the side of the flange closest to the cover. Thus, the cover supports the side of the flange closest to the cover, and when the auxiliary stationary contact contacts the auxiliary moving contact, the deformation of the flange side closest to the cover is moderate, ensuring a good electrical connection 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 opposite to the auxiliary stationary contact, and the second limiting structure is located within the receiving cavity. 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 confined 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 push rod has a second end opposite to the first end; the first limiting structure includes a first limiting step, the first limiting step having a first step surface and a second step surface, the first step surface extending axially along the push rod, the second step surface facing the auxiliary stationary contact, the opening wall of the first opening fitting with the first step surface, and the side of the cover facing the second end abutting against the second step surface. Thus, the first step surface provides an installation position for the auxiliary moving contact, facilitating its installation, while the second step surface acts as a limiting element, restricting the movement of the auxiliary moving contact relative to the push rod away from 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 through hole. The limiting member is sleeved onto the first end through the through hole and fixedly connected to the first end. Thus, the limiting member can restrict the movement of the auxiliary moving contact relative to the push rod towards the auxiliary stationary contact, preventing the auxiliary moving contact from detaching from the first end and improving the reliability of the auxiliary moving contact installation.

[0018] In one embodiment, the first end is further provided with a second limiting step, which is located within the accommodating cavity. The second limiting step 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 through hole is adapted to the third step surface, and the limiting member abuts against the fourth step surface. Thus, the third step surface provides an installation position for the limiting member, facilitating its installation, while the fourth step surface acts as a limit, 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, the cover is hemispherical and recessed along the axial direction of the push rod in a direction away from the auxiliary stationary contact.

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

[0021] In one embodiment, the auxiliary stationary contact is provided with an auxiliary stationary contact point, and the auxiliary moving contact is provided with an auxiliary moving contact point. Under the push of the push rod, the auxiliary stationary contact point and the auxiliary moving contact point come into contact or separate, thereby realizing the contact or separation of the auxiliary stationary contact and the auxiliary moving contact.

[0022] In one embodiment, at least two auxiliary stationary contacts and at least two auxiliary moving contacts are provided, and all the auxiliary stationary contacts are configured in a one-to-one correspondence with all the moving contacts.

[0023] In one embodiment, both the auxiliary moving contact and the auxiliary stationary contact are provided in even numbers. Every two auxiliary moving contacts are symmetrically arranged about the central axis of the auxiliary moving contact, and every two auxiliary stationary contacts are symmetrically arranged about the central axis of the auxiliary moving contact. When the auxiliary stationary contact contacts the auxiliary moving contact, the force is evenly distributed on the auxiliary moving contact, ensuring uniform force distribution. This results in uniform deformation of the auxiliary moving contact, ensuring a good electrical connection between the auxiliary stationary contact and the auxiliary moving contact.

[0024] In one embodiment, the high-voltage DC relay further includes a metal cover with a receiving cavity and a through hole communicating with the receiving cavity. 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 through 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, ensuring the product can be sealed.

[0025] 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 near the first end; and / or, the high-voltage DC relay further includes an insulating element, through which the auxiliary stationary contact is insulated from the metal cover. Thus, by providing an insulating element, direct conductivity between the auxiliary stationary contact and the metal cover can be avoided.

[0026] 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.

[0027] In one embodiment, the high-voltage DC relay further includes a coil frame, an insulating cover, a moving iron core, a yoke plate, a main stationary contact, and an active contact. 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 and has an insertion hole. The push rod passes through the insertion hole 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 connected to the second end and located inside the insulating cover. The main stationary contact is disposed on the side of the insulating cover away from the yoke plate. Under the push of the push rod, the active contact can contact or separate from the main stationary contact. Attached Figure Description

[0028] Figure 1 This 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 for Figure 1 Sectional view along the middle AA.

[0030] Figure 3 for Figure 2 A magnified view of a portion of point A in the middle.

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

[0032] Figure 5 This 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 ON state.

[0033] Figure 6 for Figure 5 A magnified view of a portion of point B in the middle.

[0034] Figure 7 This 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 off state.

[0035] Figure 8 for Figure 7 A magnified view of a portion of point C.

[0036] Explanation of icon numbers:

[0037] 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; 20. Auxiliary stationary contact; 30. Auxiliary moving contact; 31. Cover; 311. Receiving cavity; 312. First opening; 313. Second opening; 32. Flange; 40. Limiting element; 41. Through hole; 50. Moving iron core; 5 1. 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. Housing; 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

[0038] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0039] 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.

[0040] See Figure 1 , Figure 2 and Figure 4 The auxiliary switch assembly includes an auxiliary stationary contact 20 and an auxiliary moving contact 30. (See also...) Figure 2 , Figure 6 and Figure 8 The push rod 10 is movable along its axial direction and has a first end 11 and a second end 12 opposite to each other, which are the two ends of the push rod 10 along its axial direction. The auxiliary movable contact 30 is elastic and includes a cover 31 disposed at the first end 11 of the push rod 10. Under the push of the push rod 10, the auxiliary movable contact 30 can move toward or away from the auxiliary stationary contact 20, so that the auxiliary stationary contact 20 contacts or separates from the auxiliary movable contact 30.

[0041] 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. Using the auxiliary moving contact 30 allows for the switching of the auxiliary switch assembly without the need for separate springs and moving contact plates, reducing assembly complexity and improving efficiency. Furthermore, connecting the auxiliary moving contact 30 to the push rod 10 reduces the size chain, improves verticality, and prevents tilting. Additionally, since the auxiliary moving contact 30 includes a cover 31 (i.e., it is cover-shaped), all circumference of the cover-shaped auxiliary moving contact 30 can contact the auxiliary stationary contact 20, ensuring reliable contact even with assembly errors.

[0042] Optionally, see Figure 5 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 opposite to the second end 12, and another portion of the auxiliary stationary contact 20 is disposed on the side of the auxiliary moving contact 30 facing the second end 12. In one embodiment, see... Figure 5 and Figure 7The high-voltage DC relay also includes a main switch assembly. The main switch 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 away from 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 switch assembly and the auxiliary switch 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.

[0044] In one embodiment, see Figure 5 and Figure 7 The high-voltage DC relay also 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 through the frame 700. The main stationary contact 200 is located on the side of the insulating cover 600 opposite to the yoke plate 500, and the active contact 300 is located within the insulating cover 600.

[0045] Further, see Figure 5 and Figure 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 of the auxiliary stationary contact 20 is located outside the metal cover 60 via the through hole 62.

[0046] It should be noted that when the product does not require sealing, the metal cover 60 may not be required.

[0047] In this embodiment, the through hole 62 is located 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. Figure 2For example, the through hole 62 is located at the bottom of the metal cover 60.

[0048] When the coil is not energized, the main stationary contact 200 is separated from the active contact 300, meaning the main switch assembly is in the off state. Simultaneously, the auxiliary stationary contact 20 is in contact with 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 towards 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, thus turning on the main switch assembly. Simultaneously, the auxiliary stationary contact 20 separates from the auxiliary moving contact 30, thus turning off the auxiliary switch assembly. In this way, 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.

[0049] Specifically, see Figure 2 The moving iron core 50 has a groove 53 on one end face away from the second end 12. In this embodiment, by connecting the auxiliary moving contact 30 to the push rod 10, when glue is applied to 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 to the groove 53.

[0050] In one embodiment, see Figure 5 and Figure 7 The high-voltage DC relay also includes a stationary magnetic conductor and a resilient reset element 52. The stationary magnetic conductor is located on the side of the moving iron core 50 away from the auxiliary stationary contact 20. The resilient reset element 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 element 52 can extend and retract along the axial direction of the push rod 10. Optionally, the resilient reset element 52 is a reset spring, which is sleeved on the push rod 10.

[0051] 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 away from the auxiliary stationary contact 20 under the restoring force of the elastic reset member 52 to reset the moving iron core 50.

[0052] 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.

[0053] 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 and the moving iron core 50 cooperate to achieve magnetic conduction.

[0054] In one embodiment, see Figure 2 and Figure 3The cover 31 is provided with a receiving cavity 311 and a first opening 312 communicating with the receiving cavity 311. The cover 31 is fitted onto the first end 11 through the first opening 312. This facilitates the installation of the auxiliary moving contact 30 and improves installation efficiency.

[0055] In one embodiment, see Figure 2 The first opening 312 is located on the side of the cover 31 facing the second end 12.

[0056] Furthermore, the cover 31 is also provided with a second opening 313 communicating with the receiving cavity 311. The second opening 313 is located on the side of the cover 31 away from the second end 12. In this way, the second opening 313 can make way for the push rod 10.

[0057] In one embodiment, see Figure 6 The auxiliary moving contact 30 also includes a flange 32. The flange 32 extends outward from the wall of the second opening 313 toward the receiving cavity 311, or extends inward from the wall of the second opening 313 toward the receiving cavity 311. Under the push of the push rod 10, the auxiliary stationary contact 20 contacts or separates from the flange 32. During contact, the flange 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 better contact the flange 32, ensuring a better electrical connection between the auxiliary stationary contact 20 and the auxiliary moving contact 30. Simultaneously, the elastic force of the flange 32 provides a reaction force for the separation of the auxiliary stationary contact 20 and the auxiliary moving contact 30. Furthermore, the flange 32 can contact the auxiliary stationary contact 20 at any position in the circumference, ensuring the reliability of the contact between the auxiliary stationary contact 20 and the auxiliary moving contact 30 even if there are assembly errors in the auxiliary moving contact 30.

[0058] Of course, in other embodiments, under the action of the push rod 10, the auxiliary stationary contact 20 contacts or separates from the inner wall of the cover 31 through the second opening 313. In this way, the entire inner wall of the cover 31 can contact the auxiliary stationary contact 20, and even if there is an assembly error in the auxiliary moving contact 30, the reliability of the contact between the auxiliary stationary contact 20 and the auxiliary moving contact 30 can be guaranteed.

[0059] Further, see Figure 6 The auxiliary stationary contact 20 contacts or separates from the side of the flange 32 near the cover 31. Since the cover 31 supports the side of the flange 32 near the cover 31, when the auxiliary stationary contact contacts the auxiliary moving contact, the deformation of the side of the flange 32 near the cover 31 is moderate, ensuring a good electrical connection between the auxiliary stationary contact 20 and the moving contact.

[0060] In one embodiment, see Figure 3The cover 31 is hemispherical and recessed along the axis of the push rod 10 in the direction away from the auxiliary stationary contact 20.

[0061] Of course, in other embodiments, the cover 31 may also be hemispherical or cylindrical. Furthermore, in other embodiments, the cross-sectional shape of the cover 31 may also be trapezoidal, etc.

[0062] In one embodiment, the first end 11 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 30 away from the auxiliary stationary contact 20, and the second limiting structure is located within the receiving cavity 311. The first limiting structure and the second limiting structure cooperate to position the auxiliary movable contact 30 at the first end 11. Since the auxiliary movable contact 30 is sleeved on the first end 11 of the push rod 10, the first limiting structure and the second limiting structure are provided at 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. Thus, 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.

[0063] In one embodiment, see Figure 6 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 opening wall of the first opening 312 is adapted to the first step surface 1111, and the side of the cover 31 facing the second end 12 abuts against the second step surface 1112. During installation, the auxiliary moving contact 30 is sleeved on the first step surface 1111, which provides an installation position for the auxiliary moving contact 30, facilitating its installation. Meanwhile, the end of the cover 31 facing away from the flange 32 abuts against the second step surface 1112. The second step surface 1112 acts as a limit and can restrict the auxiliary moving contact 30 from moving away from the push rod 10, thus ensuring the reliability of the installation of the auxiliary moving contact 30.

[0064] In one embodiment, see Figure 6 and Figure 8The second limiting structure includes a limiting member 40. The limiting member 40 has a through hole 41, and is sleeved onto the first end 11 through the through hole 41, thus being fixedly connected to the first end 11. By providing the limiting member 40, the limiting member 40 can restrict the movement of the auxiliary moving contact 30 relative to the push rod 10 towards the auxiliary stationary contact 20, preventing the auxiliary moving contact 30 from detaching from the first end 11 and improving the reliability of the installation of the auxiliary moving contact 30.

[0065] 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 through hole 41 is engaged with the push rod 10; or, the wall of the through hole 41 is welded to the push rod 10; or, the limiting member 40 is riveted to the push rod 10.

[0066] Furthermore, the length of the limiting member 40 is greater than the length of the first opening 312. In this way, the limiting member 40 can restrict the movement of the auxiliary moving contact 30 relative to the push rod 10 toward the auxiliary stationary contact 20, prevent the auxiliary moving contact 30 from disengaging from the first end 11, and improve the reliability of the installation of the auxiliary moving contact 30.

[0067] In this embodiment, see Figure 4 and Figure 6 The first opening 312 is a round hole, and the limiting part 40 is a washer with a diameter larger than that of the round hole.

[0068] In one embodiment, see Figure 6 and Figure 8 The first end 11 is also provided with a second limiting step 112. The second limiting step 112 is located in the receiving cavity 311. The second limiting step 112 has a third step surface 1121 and a fourth step surface 1122. The third step surface 1121 extends along the axial direction of 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 through hole 41 is adapted to the third step surface 1121, and the side of the limiting member 40 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 limiting member 40 abuts against the fourth step surface 1122, and 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, 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. Under the push of the push rod 10, the auxiliary stationary contact and the auxiliary moving contact come into contact or separate.

[0070] Optionally, 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 and connected. 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 and connected.

[0071] In one embodiment, at least two auxiliary stationary contacts and at least two auxiliary moving contacts are provided, with each auxiliary stationary contact corresponding to one of the auxiliary moving contacts. When pushed by the push rod 10, each auxiliary stationary contact and each auxiliary moving contact either contact or separates.

[0072] Furthermore, both auxiliary moving contacts and auxiliary stationary contacts are provided in even numbers. Every two auxiliary moving contacts are symmetrically arranged about the central axis of the auxiliary moving contact 30, and every two auxiliary stationary contacts are symmetrically arranged about the central axis of the auxiliary moving contact 30. Under the push of the push rod 10, the auxiliary moving contact 30 moves towards the auxiliary stationary contact 20. The two auxiliary stationary contacts 20 contact the two moving contacts one-to-one, with force evenly pressing on the flange 32, ensuring uniform force on the auxiliary moving contact 30. This results in uniform deformation of the auxiliary moving contact 30, ensuring a good electrical connection between the auxiliary stationary contact 20 and the auxiliary moving contact 30.

[0073] In one embodiment, the high-voltage DC relay further includes an insulator 80, through which the auxiliary stationary contact 20 is insulated from the metal cover 60. Thus, the insulator 80 provides insulation, preventing direct conduction between the auxiliary stationary contact 20 and the metal cover 60.

[0074] In one embodiment, see Figure 1 , Figure 6 and Figure 8 The insulating component 80 is a ceramic component. The ceramic component is located outside the metal cover 60 and on the side of the first end 11 opposite to the second end 12. The ceramic component 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 component provides a mounting position for the auxiliary stationary contact 20, facilitating its installation, while also serving as insulation.

[0075] In this embodiment, see Figure 6 and Figure 8 There are two mounting holes 81. There are two auxiliary stationary contacts 20, and each of the two auxiliary stationary contacts 20 has a corresponding mounting hole 81.

[0076] Further, see Figure 1 , Figure 6 and Figure 8The high-voltage DC relay also includes a metal component 70. The metal component 70 is disposed between the metal cover 60 and the ceramic component, and the integral formed by the metal component 70 and the ceramic component covers 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 inside 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 formed by the metal component 70 and the ceramic component can seal the through hole 62, thereby sealing the metal cover 60.

[0077] In another embodiment, the high-voltage DC relay also includes a glass body. The glass body is disposed within the through-hole 62 to cover it, 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 components and improves assembly efficiency. Furthermore, the glass body can seal the through-hole 62 to seal the metal cover 60.

[0078] In one embodiment, see Figure 2 and Figure 4 The high-voltage DC relay also 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 away from the metal cover 60, and the auxiliary lead-out member 91 is located on the mounting bracket 90 and is 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. In this way, the auxiliary lead-out member 91 can be led out from the side.

[0079] 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.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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 by The utility model relates to a push rod, the push rod can move along its axial movement, the push rod has first end, auxiliary static contact piece, and auxiliary dynamic contact piece, the auxiliary dynamic contact piece has elasticity, the auxiliary dynamic contact piece includes cover body, the cover body is located in the first end, under the push of the push rod, the auxiliary dynamic contact piece can move to the direction of approaching or away from the auxiliary static contact piece, to make the auxiliary static contact piece and the auxiliary dynamic contact piece contact or separate. The cover body is provided with a receiving cavity and a first opening in communication with the receiving cavity, and the cover body is sleeved on the first end through the first opening. The push rod also has a second end opposite to the first end, and the first opening is located on a side of the cover body facing the second end. The cover body is also provided with a second opening in communication with the receiving cavity, and the second opening is located on a side of the cover body away from the second end. The auxiliary static contact piece contacts or separates from the inner wall of the cover body through the second opening.

2. The high-voltage DC relay according to claim 1, characterized in that The auxiliary dynamic contact piece also includes a flange extending outward from the mouth wall of the second opening toward the receiving cavity or extending inward from the mouth wall of the second opening toward the receiving cavity, and the auxiliary static contact piece contacts or separates from the flange under the push of the push rod.

3. The high-voltage DC relay according to claim 2, characterized in that The auxiliary static contact piece contacts or separates from the flange on a side of the cover body. The first end is provided with a first limiting structure and a second limiting structure, the first limiting structure is located on a side of the auxiliary dynamic contact piece away from the auxiliary static contact piece, the second limiting structure is located in the receiving cavity, and the first limiting structure cooperates with the second limiting structure to locate the auxiliary dynamic contact piece on the first end.

4. The high-voltage DC relay according to claim 3, characterized in that The push rod has a second end opposite to the first end.

5. The high-voltage DC relay according to claim 3, characterized in that The first limiting structure includes a first limiting step having a first step surface extending in the axial direction of the push rod and a second step surface facing the auxiliary static contact piece, the mouth wall of the first opening is adapted to the first step surface, and a side of the cover body facing the second end abuts against the second step surface.

6. The high-voltage DC relay according to claim 5, characterized in that The second limiting structure includes a limiting piece provided with a through hole, the limiting piece is sleeved on the first end through the through hole and fixedly connected with the first end.

7. The high-voltage DC relay according to claim 2, characterized in that The first end is also provided with a second limiting step located in the receiving cavity, the second limiting step has a third step surface extending in the axial direction of the push rod and a fourth step surface facing the auxiliary static contact piece, the hole wall of the through hole is adapted to the third step surface, and the limiting piece abuts against the fourth step surface.

8. The high-voltage DC relay according to claim 7, characterized in that The cover body is semispherical, and the cover body is recessed in a direction away from the auxiliary static contact piece in the axial direction of the push rod. The push rod has a second end opposite to the first end, and the auxiliary static contact piece is located on a side of the auxiliary dynamic contact piece away from the second end.

9. The high-voltage DC relay of claim 7, wherein, ​ 10. The high-voltage DC relay according to claim 9, characterized in that ​ 11. The high-voltage DC relay according to any one of claims 1 to 10, characterized in that ​ 12. The high-voltage DC relay according to any one of claims 1 to 10, characterized in that ​ 13. The high-voltage DC relay according to any one of claims 1 to 10, characterized in that The auxiliary static contact is provided with an auxiliary static contact point, and the auxiliary moving contact is provided with an auxiliary moving contact point. Under the pushing of the pushing rod, the auxiliary static contact point is in contact with or separated from the auxiliary moving contact point.

14. The high-voltage DC relay according to claim 13, characterized in that The auxiliary static contact and the auxiliary moving contact are each provided with at least two, and all the auxiliary static contact points are arranged in one-to-one correspondence with all the moving contact points.

15. The high-voltage DC relay of claim 13, wherein, The auxiliary moving contact and the auxiliary static contact are each provided with an even number, and every two auxiliary moving contact points are arranged symmetrically about the center axis of the auxiliary moving contact, and every two auxiliary static contact points are arranged symmetrically about the center axis of the auxiliary moving contact.

16. The high-voltage DC relay according to any one of claims 1 to 10, characterized in that The high-voltage DC relay further comprises a metal cover provided with a receiving cavity and a through hole in communication with the receiving cavity, the first end and the auxiliary moving contact are movably arranged in the receiving cavity, one end of the auxiliary static contact is arranged outside the metal cover, and the other end of the auxiliary static contact is arranged in the receiving cavity through the through hole.

17. The high-voltage DC relay of claim 16, wherein, The through hole is arranged on an end face of the metal cover along the axial direction of the pushing rod and close to the first end. And / or, the high-voltage DC relay further comprises an insulating member, and the auxiliary static contact is insulatedly connected with the metal cover through the insulating member.

18. The high-voltage DC relay according to any one of claims 1 to 10, characterized in that The high-voltage DC relay further comprises a fixing frame and an auxiliary lead-out member, the fixing frame is arranged on the side of the auxiliary static contact away from the pushing rod, and the auxiliary lead-out member is arranged on the fixing frame and is conductively connected with the auxiliary static contact.

19. The high-voltage DC relay of claim 18, wherein, The high-voltage DC relay further comprises a coil holder, an insulating cover, a moving iron core, a yoke plate, a main static contact and a main moving contact, the coil holder is provided with a coil, the coil holder is provided with an inner hole, the moving iron core and the first end are movably arranged in the inner hole, the pushing rod is fixedly connected with the moving iron core, the yoke plate is arranged on the side of the coil holder away from the auxiliary static contact, the yoke plate is provided with a insertion hole, the pushing rod passes through the insertion hole and can move in the axial direction of the insertion hole, the insulating cover is arranged on the side of the yoke plate away from the coil holder, the main moving contact is connected with the second end of the pushing rod and located in the insulating cover, and the main static contact is arranged on the side of the insulating cover away from the yoke plate. Under the pushing of the pushing rod, the main moving contact can be in contact with or separated from the main static contact.

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