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 auxiliary moving contact is arranged at the first end of the push rod. And under the driving of the push rod, the auxiliary movable contact piece can move towards or away from the auxiliary static contact piece, so that the auxiliary static contact piece is in contact with or separated from the movable contact. When the auxiliary static contact piece is contacted with the auxiliary movable contact piece, the auxiliary static contact piece abuts against the auxiliary movable contact piece, so that the auxiliary movable contact piece deforms to generate elastic force, the contact pressure between the auxiliary movable contact piece and the auxiliary static contact piece is increased, and the auxiliary static contact piece can be better contacted with the auxiliary movable 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. On-off of the auxiliary switch assembly can be realized by adopting the auxiliary movable contact piece, parts such as a spring and a movable contact piece do not need to be independently arranged, assembly of the parts is reduced, and assembly efficiency is improved. The auxiliary moving contact is arranged on the push rod, so that the perpendicularity is better, and the auxiliary moving contact is prevented from inclining.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relays, and particularly relates to a high-voltage direct-current relay. BACKGROUND

[0002] A relay is an electronic control device, which has a control system (also called an input loop) and a controlled system (also called an output loop), and is commonly applied to an automatic control circuit. The relay plays a role of automatic adjustment, safety protection and conversion of a circuit in the automatic control circuit.

[0003] With the development of new energy vehicles, an auxiliary contact technology is usually used to monitor and record the on-off of a main contact of a relay. The auxiliary contact includes an auxiliary static contact and an auxiliary dynamic contact, and the auxiliary dynamic contact is arranged on an auxiliary dynamic spring piece. However, the common auxiliary contact has a complex installation and low assembly efficiency. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a high-voltage direct-current relay, which does not need to separately arrange parts such as a spring and a dynamic contact piece, reduces assembly of the parts and improves assembly efficiency.

[0005] The present application provides a high-voltage direct-current relay, which comprises:

[0006] a push rod, the push rod being capable of moving in an axial direction thereof, the push rod having a first end;

[0007] an auxiliary static contact piece; and

[0008] an auxiliary dynamic contact piece, the auxiliary dynamic contact piece being capable of moving in a direction of approaching or moving away from the auxiliary static contact piece under the pushing of the push rod, so that the auxiliary dynamic contact piece is in contact with or separated from the auxiliary static contact piece.

[0009] The high-voltage direct-current relay has the advantages that the push rod can move along the axial direction, and the auxiliary moving contact is driven to move towards the auxiliary stationary contact or away from the auxiliary stationary contact, so that the auxiliary stationary contact and the auxiliary moving contact are in contact or separated. When the auxiliary stationary contact and the auxiliary moving contact are in contact, the auxiliary stationary contact presses against the auxiliary moving contact, so that the auxiliary moving contact is deformed to generate elastic force, thereby increasing the contact pressure between the auxiliary stationary contact and the auxiliary moving contact, so that the auxiliary stationary contact can better contact the auxiliary moving contact, and better electrical connection between the auxiliary stationary contact and the auxiliary moving contact is ensured, and the elastic force of the auxiliary moving contact provides counterforce for separation of the auxiliary stationary contact and the auxiliary moving contact. Since the auxiliary moving contact has elasticity, the auxiliary moving contact can also play a buffering role in the process of contact between the auxiliary stationary contact and the auxiliary moving contact, so that the auxiliary stationary contact and the auxiliary moving contact are prevented from being damaged, and the service life of the auxiliary stationary contact and the auxiliary moving contact is prolonged. Moreover, the spring and the moving contact and other parts do not need to be separately arranged, the assembly of parts is reduced, and the assembly efficiency is improved. In addition, the auxiliary moving contact is connected to the push rod, the size chain is reduced, the perpendicularity is better, and the auxiliary moving contact is prevented from being inclined.

[0010] In one of the embodiments, the auxiliary moving contact comprises a first elastic arm and a second elastic arm arranged on a side of the first elastic arm facing the auxiliary stationary contact, the first elastic arm is provided with a first through hole, and the first elastic arm is sleeved on the first end through the first through hole; and the second elastic arm is provided with a second through hole, and the second elastic arm is sleeved on the first end through the second through hole. When the auxiliary stationary contact and the auxiliary moving contact are in contact, the second elastic arm is deformed under the pressing of the auxiliary stationary contact to generate elastic force, thereby increasing the contact pressure between the auxiliary stationary contact and the auxiliary moving contact, so that the auxiliary stationary contact can better contact the second elastic arm, and better electrical connection between the auxiliary stationary contact and the auxiliary moving contact is ensured, and the elastic force of the second elastic arm provides counterforce for separation of the auxiliary stationary contact and the auxiliary moving contact.

[0011] In one of the embodiments, 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. In this way, the processing can be simplified, and the processing efficiency is improved.

[0012] In one of the embodiments, one end of the second elastic arm in the length direction is connected with the first elastic arm, the second through hole is a strip-shaped hole, and the strip-shaped hole extends along the length direction of the second elastic arm. In this way, the strip-shaped hole can play a role of giving way to the movement of the auxiliary moving contact, and the movement of the second elastic arm is prevented from being interfered. In addition, the strip-shaped hole cooperates with the push rod to play a certain guiding role, so that the movement of the second elastic arm has a guiding property, and the stability of contact between the auxiliary stationary contact and the auxiliary moving contact is ensured.

[0013] In one of the embodiments, the first end is provided with a first limiting structure and a second limiting structure, the first limiting structure is arranged on the side of the auxiliary moving contact away from the auxiliary stationary contact, and the second limiting structure is arranged 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 arrange the auxiliary moving contact on the first end. In this way, the auxiliary moving contact is limited on the first end of the push rod under the cooperation of the first limiting structure and the second limiting structure, so that the auxiliary moving contact can be in contact with the auxiliary stationary contact, and meanwhile, the auxiliary moving contact is prevented from being separated from the push rod.

[0014] In one of the embodiments, the first limiting structure comprises a first limiting step, the first limiting step has a first step surface and a second step surface, the first step surface extends along the axial direction of the push rod, the second step surface faces the auxiliary stationary contact, the hole 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. In this way, the first step surface provides a mounting position for the auxiliary moving contact, facilitating the installation of the auxiliary moving contact, and meanwhile, the side of the first elastic arm away from the second elastic arm abuts against the second step surface, the second step surface can play a limiting role, and the second step surface can limit the movement of the first elastic arm relative to the push rod in the direction away from the auxiliary stationary contact, so as to ensure the reliability of the installation of the auxiliary moving contact.

[0015] In one of the embodiments, the second limiting structure comprises a limiting piece, the limiting piece is provided with a third through hole, the limiting piece is sleeved on the first end through the third through hole, and the limiting piece is fixedly connected with the first end. In this way, the limiting piece limits the movement of the auxiliary moving contact in the direction close to the auxiliary stationary contact, so as to prevent the auxiliary moving contact from being separated from the first end of the push rod. In addition, under the action of the limiting piece, the auxiliary moving contact has a certain pre-compression force.

[0016] In one of the embodiments, the first end is further provided with a second limiting step, the second limiting step has a third step surface and a fourth step surface, the third step surface extends along the axial direction of the push rod, the fourth step surface faces the auxiliary stationary contact, the hole wall of the second through hole is adapted to the third step surface, and the side of the limiting piece away from the auxiliary stationary contact abuts against the fourth step surface. In this way, the third step surface provides a mounting position for the limiting piece, facilitating the installation of the limiting piece, and meanwhile, the side of the limiting piece away from the auxiliary stationary contact abuts against the fourth step surface, the fourth step surface plays a limiting role, preventing the limiting piece from moving relative to the push rod in the direction away from the auxiliary stationary contact, and ensuring the reliability of the installation of the limiting piece.

[0017] In one of the embodiments, the auxiliary stationary contact is provided with at least two, and under the pushing of the push rod, the auxiliary moving contact can be in contact with all the auxiliary stationary contacts.

[0018] In one of the embodiments, the push rod has a second end opposite to the first end, and the auxiliary static contact is arranged on a side of the auxiliary moving contact away from the second end.

[0019] In one of the embodiments, the high-voltage DC relay further comprises a metal shell 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 shell, and the other end of the auxiliary static contact is arranged in the receiving cavity through the through hole. In this way, the through hole can play a role of providing space, so that one end of the auxiliary static contact can extend into the metal shell, and the product can be sealed.

[0020] In one of the embodiments, the through hole is arranged on an end surface of the metal shell along the axial direction of the push 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 to the metal shell through the insulating member. In this way, by arranging the insulating member, the auxiliary static contact can be prevented from being directly connected to the metal shell.

[0021] In one of the embodiments, the high-voltage DC relay further comprises a fixing frame arranged on a side of the auxiliary static contact away from the push rod and an auxiliary lead-out member arranged on the fixing frame, and the auxiliary lead-out member is electrically connected to the auxiliary static contact. In this way, the auxiliary static contact can be led out through the auxiliary lead-out member.

[0022] In one of the embodiments, the push rod further has a second end opposite to the first end, and the high-voltage DC relay further comprises a main static contact and a main moving contact, the main moving contact is connected to the second end, and under the pushing of the push rod, the main moving contact can be in contact with or separated from the main static contact. In this way, the push rod can drive the main moving contact and the auxiliary moving contact to move synchronously, so that the main switch assembly and the auxiliary switch assembly are alternately turned on and off.

[0023] In one of the embodiments, the high-voltage DC relay further comprises a coil holder, a moving iron core, an insulating cover and a yoke plate, 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 push rod is fixedly connected to the moving iron core, the yoke plate is arranged on a side of the coil holder away from the auxiliary static contact, the yoke plate is provided with a insertion hole, the push rod passes through the insertion hole and can move in the axial direction of the insertion hole, the insulating cover is arranged on a side of the yoke plate away from the coil holder, the main moving contact is arranged in the insulating cover, and the main static contact is arranged on a side of the insulating cover away from the yoke plate. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A front view of a partial structure of a high-voltage direct-current relay according to an embodiment of the present application.

[0025] Figure 2 A front view of a partial structure of a high-voltage direct-current relay according to an embodiment of the present application. Figure 1 A sectional view along A-A.

[0026] Figure 3 A front view of a partial structure of a high-voltage direct-current relay according to an embodiment of the present application. Figure 2 A partial enlarged view of A.

[0027] Figure 4 A front view of a partial structure of a high-voltage direct-current relay according to an embodiment of the present application. Figure 1 A structure exploded view of a partial structure of a high-voltage direct-current relay shown in the figure.

[0028] Figure 5 A sectional view of a high-voltage direct-current relay according to an embodiment of the present application when an auxiliary switch assembly is in an on state.

[0029] Figure 6 A front view of a partial structure of a high-voltage direct-current relay according to an embodiment of the present application. Figure 5 A partial enlarged view of B.

[0030] Figure 7 A sectional view of a high-voltage direct-current relay according to an embodiment of the present application when an auxiliary switch assembly is in an off state.

[0031] Figure 8 A front view of a partial structure of a high-voltage direct-current relay according to an embodiment of the present application. Figure 7 A partial enlarged view of C.

[0032] BRIEF DESCRIPTION OF THE DRAWINGS

[0033] 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, gasket; 20, auxiliary static contact; 30, auxiliary dynamic contact; 31, first elastic arm; 311, first through hole; 32, second elastic arm; 321, second through hole; 40, limiting piece; 41, third through hole; 50, dynamic core; 51, static core; 52, elastic reset piece; 53, groove; 60, metal cover; 61, accommodating cavity; 62, via hole; 70, metal piece; 71, through hole; 80, insulating piece; 81, mounting hole; 90, fixing frame; 91, auxiliary lead-out piece; 100, housing; 200, main static contact; 300, main dynamic contact; 400, coil holder; 410, inner hole; 500, yoke plate; 510, insertion hole; 600, insulating cover; 700, frame piece; 800, contact support. DETAILED DESCRIPTION

[0034] In order to make the above objectives, features and advantages of the present application more clear and comprehensible, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a variety of ways beyond the specific embodiments described herein without departing from the scope of the present application, and it is understood that similar improvements can be made by those skilled in the art in light of the foregoing description. Therefore, the present application is not limited to the following disclosed specific embodiments.

[0035] Referring to Figure 5 and Figure 7 , the present application provides a high-voltage direct-current relay, which comprises a housing 100, a push rod 10 and an auxiliary switch assembly. The push rod 10 and the auxiliary switch assembly are both arranged in the housing 100.

[0036] Referring to Figure 1 and Figure 2 , the auxiliary switch assembly comprises an auxiliary static contact 20 and an auxiliary dynamic contact 30. Referring to Figure 2 , Figure 6 and Figure 8 , the push rod 10 has a first end 11 and a second end 12, which are two axial ends of the push rod 10. The auxiliary dynamic contact 30 is arranged at the first end 11 and has elasticity. Under the drive of the push rod 10, the auxiliary dynamic contact 30 can move towards or away from the auxiliary static contact 20, so as to make the auxiliary static contact 20 contact or separate from the auxiliary dynamic contact 30.

[0037] In one embodiment, the auxiliary static contact 20 is provided with an auxiliary static contact point, and the auxiliary dynamic contact 30 is provided with an auxiliary dynamic contact point. The auxiliary static contact point contacts or separates from the auxiliary dynamic contact point.

[0038] It should be noted that the auxiliary static contact 20 and the auxiliary static contact point are integrally arranged, or the auxiliary static contact 20 and the auxiliary static contact point are separately arranged and connected. The auxiliary dynamic contact 30 and the auxiliary dynamic contact point are integrally arranged, or the auxiliary dynamic contact 30 and the auxiliary dynamic contact point are separately arranged and connected.

[0039] Optionally, referring to Figure 3 , the auxiliary static contact 20 is arranged at a side of the auxiliary dynamic contact 30 away from the second end 12.

[0040] Of course, in other embodiments, a part of the auxiliary static contact 20 is arranged at a side of the auxiliary dynamic contact 30 away from the second end 12, and another part of the auxiliary static contact 20 is arranged corresponding to the auxiliary dynamic contact point.

[0041] The high-voltage DC relay has the advantages that the push rod 10 can move along the axial direction, and the auxiliary moving contact 30 is driven to move towards the auxiliary stationary contact 20 or away from the auxiliary stationary contact 20, so that the auxiliary stationary contact 20 and the auxiliary moving contact 30 are in contact or separated, and the on-off of the auxiliary switch assembly is realized. When the auxiliary stationary contact 20 and the auxiliary moving contact 30 are in contact, the auxiliary stationary contact 20 presses against the auxiliary moving contact 30, so that the auxiliary moving contact 30 is deformed to generate elastic force, and the contact pressure between the auxiliary moving contact 30 and the auxiliary stationary contact 20 is increased, so that the auxiliary stationary contact 20 can be better in contact with the auxiliary moving contact 30, and better electrical connection between the auxiliary stationary contact 20 and the auxiliary moving contact 30 is ensured, and the elastic force of the auxiliary moving contact 30 provides counterforce for the separation of the auxiliary stationary contact 20 and the auxiliary moving contact 30. Since the auxiliary moving contact 30 has elasticity, the auxiliary moving contact 30 can also play a buffering role in the process of the auxiliary moving contact 30 being in contact with the auxiliary stationary contact 20, so that the auxiliary stationary contact 20 and the auxiliary moving contact 30 are prevented from being damaged, and the service life of the auxiliary stationary contact 20 and the auxiliary moving contact 30 is prolonged. In addition, the on-off of the auxiliary switch assembly can be realized by using the auxiliary moving contact 30, and it is not necessary to separately arrange a spring and a moving contact piece and other parts, so that the assembly of parts is reduced, and the assembly efficiency is improved. In addition, the auxiliary moving contact 30 is connected to the push rod 10, so that the size chain is reduced, the perpendicularity is better, and the auxiliary moving contact 30 is prevented from being inclined.

[0042] In one embodiment, referring to Figure 5 and Figure 7 , the high-voltage DC relay further comprises a main switch assembly. The main switch assembly comprises a main stationary contact 200 and a main moving contact 300. The main stationary contact 200 is arranged on the side of the second end 12 of the push rod 10 away from the first end 11, and the main moving contact 300 is connected to the second end 12 of the push rod 10 through the contact support 800. Since the main moving contact 300 and the auxiliary moving contact 30 are both connected to the push rod 10, the push rod 10 can drive the main moving contact 300 and the auxiliary moving contact 30 to move synchronously, so that the main switch assembly and the auxiliary switch assembly are alternately turned on and turned off. Specifically, when the main stationary contact 200 and the main moving contact 300 are in contact, the auxiliary stationary contact 20 and the auxiliary moving contact 30 are separated; and when the main stationary contact 200 and the main moving contact 300 are separated, the auxiliary stationary contact 20 and the auxiliary moving contact 30 are in contact.

[0043] In one embodiment, referring to Figure 5 and Figure 7The high-voltage DC relay further comprises a coil holder 400, a yoke plate 500, and an insulating cover 600. The coil holder 400 is provided with a coil wound thereon, and is provided with an inner hole 410 in which the first end 11 of the push rod 10 is movably arranged. The yoke plate 500 is arranged on the side of the coil holder 400 away from the auxiliary static contact 20, and is provided with a insertion hole 510 through which the push rod 10 passes and can move along the axial direction of the insertion hole 510. The insulating cover 600 is arranged on the side of the yoke plate 500 away from the coil holder 400 and is spaced apart from the yoke plate 500, and a frame 700 is arranged 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 static contact 200 is arranged on the side of the insulating cover 600 away from the yoke plate 500, and the main dynamic contact 300 is arranged in the insulating cover 600.

[0044] Further, referring to Figure 5 and Figure 7 , the high-voltage DC relay further comprises a metal cover 60 and a moving iron core 50. The metal cover 60 is arranged in the inner hole 410, and the metal cover 60 is provided with a receiving cavity 61 and a via hole 62 communicating with the receiving cavity 61, and the first end 11 of the push rod 10, the auxiliary dynamic contact 30, and the moving iron core 50 are movably arranged in the receiving cavity 61, and the moving iron core 50 is fixedly connected to the push rod 10. The auxiliary static contact 20 is at least partially arranged in the metal cover 60, and optionally, one end of the auxiliary static contact 20 is located in the receiving cavity 61 and the other end of the auxiliary static contact 20 is located outside the metal cover 60. In this way, the via hole 62 can play a role of giving way to ensure that one end of the auxiliary static contact 20 can extend into the metal cover 60 and ensure that the product can be sealed. It should be noted that when the product does not need to be sealed, the metal cover 60 can also not be arranged.

[0045] In this embodiment, the via hole 62 is arranged on an end face of the metal cover 60 along the axial direction of the push rod 10 and close to the first end 11. For example, the via hole 62 is arranged at the bottom of the metal cover 60. Figure 2

[0046] When the coil is not powered, the main static contact 200 is separated from the main dynamic contact 300, that is, the main switch assembly is in an open state, and at the same time, the auxiliary static contact 20 is in contact with the auxiliary dynamic contact 30, that is, the auxiliary switch assembly is in a conductive state. When the coil is powered, the moving iron core 50 moves in the axial direction away from the auxiliary static contact 20 under the action of the magnetic field force, and then drives the push rod 10 to move synchronously, so that the main static contact 200 is in contact with the main dynamic contact 300, and the main switch assembly is in a conductive state, and at the same time, the auxiliary static contact 20 is separated from the auxiliary dynamic contact 30, and the auxiliary switch assembly is in an open state. In this way, the magnetic field force generated when the coil is powered provides power for the movement of the moving iron core 50 and the push rod 10.

[0047] Specifically, referring to Figure 2 ​The end of the moving iron core 50 away from the second end 12 is provided with a groove 53. In this embodiment, the auxiliary moving contact 30 is connected to the push rod 10. When the push rod 10 is fixed to the moving iron core 50 by dispensing glue at the groove 53, the auxiliary moving contact 30 does not block the groove 53, and the dispensing of glue at the groove 53 is facilitated.

[0048] In one embodiment, referring to Figure 5 and Figure 7 The high-voltage DC relay further comprises a static magnetic conducting member and an elastic reset member 52. The static magnetic conducting member is arranged on the side of the moving iron core 50 away from the auxiliary static contact 20. The elastic reset member 52 is arranged in the metal cover 60, one end of the elastic reset member 52 is connected to the static magnetic conducting member, the other end of the elastic reset member 52 is connected to the moving iron core 50, and the elastic reset member 52 can stretch and contract along the axial direction of the push rod 10. Optionally, the elastic reset member 52 is a reset spring, and the reset spring is sleeved on the push rod 10.

[0049] When the coil is powered on, the moving iron core 50 moves away from the auxiliary static contact 20 under the action of the magnetic force, and the elastic reset member 52 is gradually compressed. When the coil is powered off, the moving iron core 50 moves towards the auxiliary static contact 20 under the action of the restoring force of the elastic reset member 52 to reset the moving iron core 50.

[0050] Optionally, the static magnetic conducting member is a yoke plate 500 arranged on the side of the metal cover 60 away from the auxiliary static contact 20, and the yoke plate 500 cooperates with the moving iron core 50 to realize magnetic conduction.

[0051] Optionally, the static magnetic conducting member is a static iron core 51 arranged in the metal cover 60 and fixedly connected to the yoke plate 500, and the static iron core 51 cooperates with the moving iron core 50 to realize magnetic conduction.

[0052] In one embodiment, referring to Figure 2 and Figure 3 The auxiliary moving contact 30 comprises a first elastic arm 31 and a second elastic arm 32. The second elastic arm 32 is arranged on the side of the first elastic arm 31 facing the auxiliary static contact 20. The first elastic arm 31 is provided with a first through hole 311, and the first elastic arm 31 is sleeved on the first end 11 of the push rod 10 through the first through hole 311. The second elastic arm 32 is provided with a second through hole 321, and the second elastic arm 32 is sleeved on the first end 11 of the push rod 10 through the second through hole 321.

[0053] 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 on the first end 11 of the push rod 10, so that the stress of the auxiliary moving contact 30 can be avoided from being too large to break.

[0054] 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.

[0055] Optionally, see Figure 3 The first elastic arm 31 and the second elastic arm 32 are set 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.

[0056] In this embodiment, see Figure 3 The first elastic arm 31 is perpendicular to the axis of the push rod 10, so that... Figure 3 For example, the first elastic arm 31 is horizontally positioned. One end of the second elastic arm 32 is connected to the first elastic arm 31 along its length, and the other end of the second elastic arm 32 is inclined towards the auxiliary stationary contact 20.

[0057] 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.

[0058] 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.

[0059] In one embodiment, see 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 located within it. 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, allowing it to make way for the movement of the auxiliary moving contact 30 and 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.

[0060] In one embodiment, the first end 11 is provided with a first limiting structure and a second limiting structure. The first limiting structure is arranged on the side of the auxiliary moving contact 30 away from the auxiliary stationary contact 20, and the second limiting structure is arranged 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 arrange the auxiliary moving contact 30 on the first end 11. Since the auxiliary moving contact 30 is sleeved on the first end 11 of the push rod 10, the first limiting structure and the second limiting structure are arranged on the first end 11 of the push rod 10. The auxiliary moving contact 30 is arranged between the first limiting structure and the second limiting structure. The first limiting structure limits the movement of the auxiliary moving contact 30 away from the auxiliary stationary contact 20, and the second limiting structure limits the movement of the auxiliary moving contact 30 towards the auxiliary stationary contact 20. Thus, under the cooperation of the first limiting structure and the second limiting structure, the auxiliary moving contact 30 is limited on the first end 11 of the push rod 10, ensuring that the auxiliary moving contact 30 can contact the auxiliary stationary contact 20, while avoiding separation of the auxiliary moving contact 30 from the push rod 10.

[0061] In one embodiment, referring to Figure 3 and Figure 4 , the first limiting structure includes a first limiting step 111. The first limiting step 111 has a first step surface 1111 extending along the axial direction of the push rod 10, and a second step surface 1112 facing the auxiliary stationary contact 20. The first step surface 1111 is perpendicular to the second step surface 1112. The hole wall of the first through hole 311 is adapted to the first step surface 1111, and the side of the first elastic arm 31 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, which provides an installation position for the auxiliary moving contact 30, facilitating the installation of the auxiliary moving contact 30. At the same time, the side of the first elastic arm 31 away from the second elastic arm 32 abuts against the second step surface 1112, which can limit the movement of the first elastic arm 31 relative to the push rod 10 away from the auxiliary stationary contact 20, ensuring the reliability of the installation of the auxiliary moving contact 30.

[0062] Further, referring to Figure 4 and Figure 6 , the high-voltage DC relay further includes a gasket 13. The gasket 13 is sleeved on the first end 11, and the diameter of the gasket 13 is greater than the diameter of the second step surface 1112. The gasket 13 has a hole in the middle, which is adapted to the first step surface 1111. The gasket 13 is arranged between the auxiliary moving contact 30 and the second step surface 1112 and contacts the auxiliary moving contact 30 and the second step surface 1112. In this way, the contact area of the auxiliary moving contact 30 and the second step surface 1112 can be increased.

[0063] In one embodiment, referring to Figure 3 The second limiting structure comprises a limiting piece 40. The limiting piece 40 is provided with a third through hole 41. The limiting piece 40 is sleeved on the first end 11 of the push rod 10 through the third through hole 41. The limiting piece 40 is fixedly connected with the push rod 10. In this way, the limiting piece 40 limits the movement of the auxiliary moving contact 30 towards the auxiliary stationary contact 20, preventing the auxiliary moving contact 30 from being separated from the first end 11 of the push rod 10. In addition, under the action of the limiting piece 40, the auxiliary moving contact 30 has a certain pre-compression force.

[0064] It should be noted that there are various ways to fixedly connect the limiting piece 40 with the push rod 10. Alternatively, the hole wall of the third through hole 41 is snap-fitted with the push rod 10; or the hole wall of the third through hole 41 is welded with the push rod 10; or the limiting piece 40 is riveted with the push rod 10.

[0065] In one embodiment, referring to Figure 3 and Figure 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 extending along the axial direction of the push rod 10 and a fourth step surface 1122 facing the auxiliary stationary contact 20. The third step surface 1121 is perpendicular to the fourth step surface 1122. The hole wall of the third through hole 41 is adapted to the third step surface 1121. The side of the limiting piece 40 away from the auxiliary stationary contact 20 abuts against the fourth step surface 1122. During installation, the limiting piece 40 is sleeved on the third step surface 1121. The third step surface 1121 provides an installation position for the limiting piece 40, facilitating the installation of the limiting piece 40. At the same time, the side of the limiting piece 40 away from the auxiliary stationary contact 20 abuts against the fourth step surface 1122. The fourth step surface 1122 plays a limiting role, preventing the limiting piece 40 from moving away from the auxiliary stationary contact 20 relative to the push rod 10, and ensuring the reliability of the installation of the limiting piece 40.

[0066] In one embodiment, referring to Figure 3 and Figure 6 The auxiliary stationary contact 20 is provided with two auxiliary stationary contacts 20. Under the pushing of the push rod 10, the auxiliary moving contact 30 can be in contact with or separated from the two auxiliary stationary contacts 20.

[0067] In this embodiment, when the auxiliary stationary contact 20 is in contact with the auxiliary moving contact 30, the two auxiliary stationary contacts 20 are respectively in contact with the parts of the second elastic arm 32 located on both sides of the extension direction of the strip-shaped hole.

[0068] In one embodiment, the auxiliary switch assembly further comprises an insulating piece 80. The auxiliary stationary contact 20 is insulatively connected with the metal cover 60 through the insulating piece 80. In this way, the insulating piece 80 plays an insulating role, avoiding the direct conduction between the auxiliary stationary contact 20 and the metal cover 60.

[0069] In one embodiment, referring to Figure 1 , Figure 6 and Figure 8 , the insulating member 80 is a ceramic member. The ceramic member is arranged outside the metal cover 60 and on the side of the first end 11 away from the second end 12. The ceramic member is provided with a mounting hole 81 in communication with the through hole 62, and the auxiliary static contact 20 is arranged in the mounting hole 81. In this way, the ceramic member provides a mounting position for the auxiliary static contact 20, facilitating the installation of the auxiliary static contact 20, and at the same time, the ceramic member can play an insulating role.

[0070] In this embodiment, referring to Figure 6 and Figure 8 , the mounting hole 81 is provided with two, and the two auxiliary static contacts 20 are arranged one-to-one in the two mounting holes 81.

[0071] Further, referring to Figure 1 , Figure 6 and Figure 8 , the auxiliary switch assembly further comprises a metal member 70. The metal member 70 is arranged between the metal cover 60 and the ceramic member, the metal member 70 and the ceramic member are integrally covered on the through hole 62, and the metal member 70 is welded with the metal cover 60. The metal member 70 has an axially extending through hole 71, the through hole 71 is in communication with the mounting hole 81 and the through hole 62, one end of the auxiliary static contact 20 is arranged outside the metal cover 60, and the other end of the auxiliary static contact 20 is arranged in the receiving cavity 61 through the mounting hole 81, the through hole 71 and the through hole 62. In this way, the auxiliary static contact 20 is fixed to the metal cover 60 by welding. In addition, the metal member 70 and the ceramic member cooperatively form an integral body which can seal the through hole 62 to seal the metal cover 60.

[0072] In another embodiment, the insulating member 80 comprises a glass body. The glass body is arranged in the through hole 62 to cover the through hole 62, and the auxiliary static contact 20 is connected to the metal cover 60 through the glass body. It can be understood that the auxiliary static contact 20, the glass body and the metal cover 60 are sintered together in the through hole 62, that is, one end of the auxiliary static contact 20 is located outside the receiving cavity 61, and the other end of the auxiliary static contact 20 is located outside the receiving cavity 61. In this way, the parts are simplified and the assembly efficiency is improved. In addition, the glass body can seal the through hole 62 to seal the metal cover 60.

[0073] In one embodiment, referring to Figure 2 and Figure 4 , the high-voltage DC relay further comprises a fixing frame 90 and an auxiliary lead-out member 91. The fixing frame 90 is arranged on the side of the auxiliary static contact 20 away from the metal cover 60, the auxiliary lead-out member 91 is arranged on the fixing frame 90 and arranged in a direction perpendicular to the axial direction of the push rod 10, and the auxiliary lead-out member 91 is electrically connected with the auxiliary static contact 20. In this way, the auxiliary lead-out member 91 can be led out laterally.

[0074] In the description of the present application, it is necessary to understand that if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0075] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "multiple" appears, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified and limited.

[0076] In the present application, unless otherwise explicitly specified and limited, if the terms "mounting", "connecting", "connecting", "fixing" and the like appear, these terms should be broadly understood. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0077] In the present application, unless otherwise explicitly specified and limited, if the first feature appears "on" or "under" the second feature and the like, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0078] It is to be noted that when an element such as a layer, film, or region is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. In contrast, when an element is referred to as being "directly on" another element, there are no intervening elements present. It will be understood that, when an element or layer is referred to as being "connected" to or "coupled" to another element or layer, it can be directly connected or coupled or intervening elements can be present. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0079] Various technical features described in the above embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations are described. It will be understood that the scope of the disclosure encompasses all such possible combinations.

[0080] The above-described embodiments are merely illustrative for the present application and are not to be used in a limiting manner. It should be understood by those skilled in the art that various modifications and improvements can be made to the present application without departing from the scope of the present application. Therefore, the scope of the present application should be defined 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 moving contact piece, the auxiliary moving contact piece has elasticity, the auxiliary moving contact piece is located in the first end, under the push of the push rod, the auxiliary moving contact piece can move to the direction of approaching or away from the auxiliary static contact piece, to make the auxiliary moving contact piece contact or separate with the auxiliary static contact piece. The auxiliary moving contact piece includes first elastic arm and second elastic arm, the second elastic arm is located in the side of the first elastic arm towards the auxiliary static contact piece, the first elastic arm is equipped with first through hole, the first elastic arm is sleeved on the first end through the first through hole, the second elastic arm is equipped with second through hole, and the second elastic arm is sleeved on the first end through the second through hole. 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. One end of the length direction of the second elastic arm is connected with the first elastic arm, the second through hole is a strip-shaped hole, and the strip-shaped hole extends along the length direction of the second elastic arm. The first end is provided with first limiting structure and second limiting structure, the first limiting structure is located in the side of the auxiliary moving contact piece away from the auxiliary static contact piece, the second limiting structure is located in the side of the auxiliary moving contact piece close to the auxiliary static contact piece, and the first limiting structure and the second limiting structure cooperate to locate the auxiliary moving contact piece on the first end.

2. The high-voltage DC relay according to claim 1, characterized in that The first limiting structure includes first limiting step, the first limiting step has first step surface and second step surface, the first step surface extends along the axial direction of the push rod, the second step surface faces the auxiliary static contact piece, the hole wall of the first through hole is matched with the first step surface, and the side of the first elastic arm away from the second elastic arm abuts against the second step surface.

3. The high-voltage DC relay according to claim 2, characterized in that The second limiting structure includes limiting piece, the limiting piece is provided with third through hole, the limiting piece is sleeved on the first end through the third through hole, and the limiting piece is fixedly connected with the first end.

4. The high-voltage DC relay according to claim 2, characterized in that The first end is also provided with second limiting step, the second limiting step has third step surface and fourth step surface, the third step surface extends along the axial direction of the push rod, the fourth step surface faces the auxiliary static contact piece, the hole wall of the second through hole is matched with the third step surface, and the side of the limiting piece away from the auxiliary static contact piece abuts against the fourth step surface.

5. The high-voltage DC relay of claim 2, wherein, The auxiliary static contact piece is provided with at least two, and under the push of the push rod, the auxiliary moving contact piece can contact all the auxiliary static contact pieces.

6. The high-voltage DC relay according to claim 5, characterized in that The push rod has a second end opposite to the first end, and the auxiliary static contact piece is located on the side of the auxiliary moving contact piece away from the second end.

7. The high-voltage DC relay according to claim 5, characterized in that ​ 8. The high-voltage DC relay according to claim 7, characterized in that ​ 9. The high-voltage DC relay of claim 1, wherein, ​ 10. The high-voltage DC relay according to any one of claims 1 to 9, characterized in that ​ 11. The high-voltage DC relay according to any one of claims 1 to 9, 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 movable contact are movably arranged in the receiving cavity, one end of the auxiliary fixed contact is arranged outside the metal cover, and the other end of the auxiliary fixed contact is arranged 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 arranged on an end surface of the metal cover along the axial direction of the push rod and close to the first end; And / or, the high-voltage DC relay further comprises an insulating member, the auxiliary fixed contact is insulatedly connected with the metal cover through the insulating member.

13. The high-voltage DC relay according to any one of claims 1 to 9, 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 a side of the auxiliary fixed contact away from the push rod, and the auxiliary lead-out member is arranged on the fixing frame and electrically connected with the auxiliary fixed contact.

14. The high-voltage DC relay according to any one of claims 1 to 9, characterized in that The push rod further has a second end opposite to the first end, the high-voltage DC relay further comprises a main fixed contact and a main movable contact, the main movable contact is connected to the second end and can be in contact with or separated from the main fixed contact under the pushing of the push rod.

15. The high-voltage DC relay of claim 14, wherein, The high-voltage DC relay further comprises a coil holder, a movable iron core, an insulating cover and a yoke plate, the coil holder is provided with a coil, the coil holder is provided with an inner hole, the movable iron core and the first end are movably arranged in the inner hole, the push rod is fixedly connected with the movable iron core, the yoke plate is arranged on a side of the coil holder away from the auxiliary fixed contact, the yoke plate is provided with a insertion hole, the push rod passes through the insertion hole and can move in the axial direction of the insertion hole, the insulating cover is arranged on a side of the yoke plate away from the coil holder, the main movable contact is arranged in the insulating cover, and the main fixed contact is arranged on a side of the insulating cover away from the yoke plate.

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