A high voltage direct current contactor

Abstract

The application discloses a high-voltage direct-current contactor, which comprises a push rod structure, a steel sheet and a movable contact structure, wherein the push rod structure comprises a push rod and a plastic base; the steel sheet is fixedly connected to the plastic base and protrudes from the plastic base at two ends in a first direction; the movable contact structure comprises a U-shaped basket, a movable contact block and a lower magnetic conducting piece; the U-shaped basket is arranged in an inverted position, and two ends of the U-shaped basket are slidably connected to two ends of the steel sheet; and elastic members are arranged at two ends of the U-shaped basket and the plastic base respectively. In the high-voltage direct-current contactor, the U-shaped basket is arranged in a sliding mode relative to the steel sheet, the riveting process of the U-shaped basket and the steel sheet is avoided, and the assembly difficulty of the whole high-voltage direct-current contactor is reduced.

Description

Technical Field

[0001] This invention belongs to the field of high-voltage DC contactor technology, and specifically relates to a high-voltage DC contactor. Background Technology

[0002] A high-voltage DC contactor is a contactor used to control high-voltage DC circuits and is widely used in energy storage and charging, automobiles, and engineering vehicles. A high-voltage DC contactor mainly consists of a push rod body, a U-shaped basket, a moving point block, a lower magnetic conductor, and a spring. Typically, the U-shaped basket, moving point block, and lower magnetic conductor are riveted together, and the steel plates on the plastic base are then riveted to the two free ends of the U-shaped basket. This arrangement results in multiple riveting steps required for assembling high-voltage DC contactors in existing technologies, increasing the difficulty of assembly. Summary of the Invention

[0003] The purpose of this invention is to disclose a high-voltage DC contactor to solve the technical problem of the difficulty in assembling high-voltage DC contactors in the prior art.

[0004] To achieve the above objectives, the present invention discloses a high-voltage DC contactor, comprising: The push rod structure includes a push rod and a plastic base; A steel sheet is fixedly connected to the plastic base, and both ends of the steel sheet protrude from the plastic base along the first direction; The moving contact structure includes a U-shaped basket, a moving point block, and a lower magnetic guide. The U-shaped basket is inverted, and the two ends of the U-shaped basket are slidably engaged with the two ends of the steel sheet. The elastic element acts on the U-shaped basket and the plastic base at both ends, respectively.

[0005] As an optional implementation, the high-voltage DC contactor further includes a housing, the moving contact structure is disposed within the housing, the U-shaped basket is provided with a first guide member on at least one side along the first direction, and a second guide member is provided on the inner wall of the housing, the first guide member and the second guide member being slidably engaged.

[0006] As an optional implementation, the first guide member is bent into an arc shape and then bent towards the second guide member and then towards the plastic base.

[0007] As an optional implementation, the first guide member is disposed on the side of the U-shaped basket near the lower magnetic guide member.

[0008] As an optional implementation, the U-shaped basket is provided with a sliding opening for the steel sheet to slide, and each end of the U-shaped basket along the first direction and towards the side away from the elastic member is provided with a rib, the rib surrounding the sliding opening and slidingly engaging with the steel sheet.

[0009] As an optional implementation, the moving point block, the lower magnetic conductor, and the U-shaped basket are stacked sequentially from top to bottom, and the two ends of the lower magnetic conductor protrude from the moving point block along the first direction, wherein the first direction is the width direction of the moving point block.

[0010] As an optional implementation, the lower magnetic conductor is U-shaped, including a connecting part and two attracting parts located at both ends of the connecting part in the first direction. The connecting part is connected to the moving point block and the U-shaped basket respectively. The two attracting parts are located on both sides of the moving point block along the first direction and extend upward.

[0011] As an optional implementation, one of the lower magnetic conductor and the U-shaped basket is provided with a positioning post, and the other is provided with a positioning groove, wherein the positioning post and the positioning groove are inserted into each other.

[0012] As an optional implementation, the moving point block is provided with a clearance opening on each side along the first direction, and the clearance opening and the positioning groove are provided correspondingly along the first direction.

[0013] As an optional implementation, the moving point block, the lower magnetic conductor, and the U-shaped basket are riveted together and fixed by riveting posts.

[0014] Compared with the prior art, the advantages of the high-voltage DC contactor of the present invention are as follows: The high-voltage DC contactor of the present invention is achieved by fixing a steel sheet on a plastic base, assembling a U-shaped basket, a moving point block, and a lower magnetic conductor into a whole, and then setting the two ends of the U-shaped basket to slide and engage with the two ends of the steel sheet respectively. Since the U-shaped basket is slidably set relative to the steel sheet, the process of riveting the U-shaped basket and the steel sheet is avoided, thus reducing the assembly difficulty of the entire high-voltage DC contactor. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a perspective view of a high-voltage DC contactor according to an embodiment of the present invention; Figure 2 yes Figure 1 Top view of the high-voltage DC contactor in the diagram; Figure 3 yes Figure 2 A cross-sectional view along the AA direction; Figure 4 yes Figure 1 A schematic diagram of the structure of the high-voltage DC contactor hidden under the cover. Figure 5 yes Figure 4 Top view of the high-voltage DC contactor hidden behind its enclosure; Figure 6 yes Figure 5 A cross-sectional view along the BB direction; Figure 7 yes Figure 4 A schematic diagram of the push rod structure and moving contact structure in the diagram; Figure 8 yes Figure 7 An exploded view of the push rod structure and moving contact structure in the diagram; Figure 9 yes Figure 7 An exploded view of the push rod structure and moving contact structure from another perspective; Figure 10 yes Figure 1 A schematic diagram of the structure of the cover.

[0017] Explanation of key figure labels: 100-High voltage DC contactor, 10-Push rod structure, 11-Push rod, 12-Plastic base, 20-Steel sheet, 30-Moving contact structure, 31-U-shaped basket, 311-Positioning groove, 312-First guide, 313-Sliding port, 314-Protruding rib, 32-Moving block, 321-Allowing port, 33-Lower magnetic conductor, 331-Connecting part, 332-Actuating part, 333-Positioning post, 40-Elastic element, 50-Cover, 51-Second guide, 60-Stationary contact, 70-Yoke plate, 80-Riveting post. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing the invention and its embodiments, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to be constructed and operated in a specific orientation.

[0020] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in certain situations to indicate a dependency or connection. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0021] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; 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, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0022] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0023] The technical solution of the present invention will be further described below with reference to the embodiments and accompanying drawings.

[0024] Please see Figures 1 to 10 This application provides a high-voltage DC contactor 100, including a push rod structure 10, a steel sheet 20, a moving contact structure 30, and an elastic element 40.

[0025] The push rod structure 10 includes a push rod 11 and a plastic base 12; a steel sheet 20 is fixedly connected to the plastic base 12, and both ends of the steel sheet 20 protrude from the plastic base 12 along the first direction a; the moving contact structure 30 includes a U-shaped basket 31, a moving point block 32 and a lower magnetic conductor 33, the U-shaped basket 31 is inverted, and both ends of the U-shaped basket 31 are slidably arranged relative to the two ends of the steel sheet 20; the two ends of the elastic member 40 act on the U-shaped basket 31 and the plastic base 12 respectively.

[0026] The aforementioned high-voltage DC contactor 100 is assembled by fixing the steel sheet 20 onto the plastic base 12, and then assembling the U-shaped basket 31, the moving point block 32, and the lower magnetic conductor 33 into a whole. Finally, the two ends of the U-shaped basket 31 are slidably engaged with the two ends of the steel sheet 20. Since the U-shaped basket 31 is slidably arranged relative to the steel sheet 20, the process of riveting the U-shaped basket 31 and the steel sheet 20 is avoided, thus reducing the assembly difficulty of the entire high-voltage DC contactor 100.

[0027] Furthermore, the closing process of the high-voltage DC contactor 100 in this embodiment is as follows: Since the elastic element 40 supports the lower magnetic conductor 33, the U-shaped basket 31, and the moving block 32, initially, the elastic element 40 is in a slightly compressed state. The push rod 11 drives the elastic element 40, the U-shaped basket 31, the moving block 32, and the lower magnetic conductor 33 to move upward. After the moving block 32 and the stationary contact 60 close, the push rod 11 continues to move upward, and the steel plate 20 slides relative to the U-shaped basket 31, compressing the elastic element 40 to achieve an overtravel process. When disconnecting, the push rod 11 moves downward, simultaneously driving the steel plate 20 downward. Under the action of gravity, the U-shaped basket 31, the moving block 32, and the lower magnetic conductor 33 are simultaneously supported by the elastic element 40 and return to their original positions.

[0028] The push rod 11 extends vertically, with its upper end fixedly connected to the plastic base 12 and its lower end connected to the moving iron core to receive the driving force of the magnetic circuit drive system. The plastic base 12 is a seat made of insulating material, fitted onto the upper end of the push rod 11, or integrally formed with the upper end of the push rod 11. Please refer to [link / reference]. Figures 1 to 3 The high-voltage DC contactor 100 in this embodiment also includes a cover 50 and a yoke plate 70, etc., and the moving contact structure 30 is disposed inside the cover 50.

[0029] In some embodiments, the steel sheet 20 is fixedly connected to the plastic base 12, specifically, it is integrally formed with the plastic base 12, and both ends of the steel sheet 20 protrude from the plastic base 12 along the first direction a. In this embodiment, the steel sheet 20 and the plastic base 12 are preferably fixedly connected by integral injection molding, thereby avoiding the subsequent steps of fixing the steel sheet 20 and the plastic base 12. Specifically, when integrally injection molding the steel sheet 20 and the plastic base 12, the steel sheet 20 is placed as an insert into the injection mold, and then plastic material is injected into the injection mold, so that the plastic base 12 is formed outside the steel sheet 20, and both ends of the steel sheet 20 protrude from the plastic base 12.

[0030] In other embodiments, the steel sheet 20 and the plastic base 12 can be fixed by inserting and interlocking, or by bonding.

[0031] Please refer to Figures 3 to 9 The U-shaped basket 31 is inverted, meaning that the opening of the U-shaped basket 31 faces downwards. When it cooperates with the steel sheet 20, each end of the U-shaped basket 31 is provided with a sliding opening 313 or a sliding groove, and the two ends of the steel sheet 20 are respectively inserted into the corresponding sliding opening 313 or sliding groove, so that the U-shaped basket 31 can slide relative to the steel sheet 20.

[0032] Please see Figures 4 to 9In this embodiment, the moving point block 32, the lower magnetic conductor 33, and the U-shaped basket 31 are stacked sequentially from top to bottom, with the lower magnetic conductor 33 protruding from both ends of the moving point block 32 along the first direction a, where the first direction a is the width direction of the moving point block 32. Specifically, the moving point block 32 is located at the top, and its lower surface is in contact with the upper surface of the lower magnetic conductor 33; the lower magnetic conductor 33 is located in the middle, and its lower surface is in contact with the top of the U-shaped basket 31; the U-shaped basket 31 is located at the bottom, and its top supports the lower magnetic conductor 33 and the moving point block 32, and the lower magnetic conductor... The lower magnetic component 33 protrudes outward on both sides along the width direction (i.e., the first direction a) of the moving block 32, forming a suction portion 332 for cooperating with the stationary contact 60. In this way, by protruding the lower magnetic component 33 outward on both sides along the width direction of the moving block 32, the width of the lower magnetic component 33 protruding relative to the moving block 32 along the first direction a can be controlled, thereby controlling the suction area with the upper magnetic component. When the moving block 32 carries a large current, there is a strong magnetic force between the upper magnetic component and the lower magnetic component 33 to resist the electric repulsion force. In this way, the voltage resistance of the high voltage DC contactor 100 of this application can be improved.

[0033] Specifically, based on the setting that the lower magnetic conductor 33 protrudes from both ends of the moving point block 32 along the first direction a, the lower magnetic conductor 33 in this embodiment is U-shaped, including a connecting part 331 and two attracting parts 332 located at both ends of the connecting part 331 along the first direction a. The connecting part 331 is connected to the moving point block 32 and the U-shaped basket 31 respectively. The two attracting parts 332 are located on both sides of the moving point block 32 along the first direction a and extend upward.

[0034] Specifically, the middle connecting part 331 is flat and contacts and is fixedly connected to the lower surface of the moving point block 32 and the upper surface of the U-shaped basket 31. The two ends of the connecting part 331 are bent upward or form two attracting parts 332. The two attracting parts 332 are located on both sides of the width direction of the moving point block 32 and extend upward to get as close as possible to the upper magnetic conductor, so as to contact and conduct with the upper magnetic conductor when the contactor is closed.

[0035] Thus, the upwardly extending attraction part 332 can attract the upper magnetic conductor located above, thereby resisting the electric repulsion force generated between the moving point block 32 and the stationary contact 60, and ensuring the closing stability between the moving point block 32 and the stationary contact 60.

[0036] Please see Figures 6 to 9In the initial state, the U-shaped basket 31, the lower magnetic guide 33, and the moving point block 32 are independent structures. To facilitate their assembly, one of the lower magnetic guide 33 and the U-shaped basket 31 is provided with a positioning post 333, and the other is provided with a positioning groove 311. The positioning post 333 and the positioning groove 311 are interlocked. For example, a downwardly protruding positioning post 333 can be provided on the lower surface of the lower magnetic guide 33, and a positioning groove 311 can be provided on the top of the U-shaped basket 31 corresponding to the position of the positioning post 333; or the other... In this embodiment, a positioning post protruding upward can be provided on the upper surface of the top of the U-shaped basket 31, and a positioning groove can be provided on the lower surface of the lower magnetic conductor 33. The positioning post 333 and the positioning groove 311 are adapted to each other. The positioning post 333 is inserted into the positioning groove 311. In this way, the precise positioning between the lower magnetic conductor 33 and the U-shaped basket 31 is achieved, thereby ensuring the subsequent assembly of the U-shaped basket 31, the lower magnetic conductor 33 and the moving point block 32, ensuring assembly accuracy, reducing assembly difficulty and improving assembly efficiency.

[0037] Specifically, please refer to Figure 8 and Figure 9 Since the lower magnetic conductor 33 is thicker and the U-shaped basket 31 is thinner, in order to facilitate the opening of the positioning post 333 and the positioning groove 311, the lower surface of the lower magnetic conductor 33 in this embodiment is provided with a positioning post 333 and the U-shaped basket 31 is provided with a positioning groove 311.

[0038] It should be noted that the cross-sectional shape of the positioning post 333 can be circular, square, elliptical, etc., and the number of positioning posts 333 can be one or more. When multiple positioning posts 333 are set, they can be arranged symmetrically to improve the balance of positioning.

[0039] Specifically, in this embodiment, two positioning posts 333 are provided. The two positioning posts 333 are arranged symmetrically around the center of the connecting part 331 and are located at both ends of the connecting part 331 in a direction perpendicular to the first direction a (i.e., the length direction of the moving block 32).

[0040] Corresponding to the setting of the positioning post 333 and the positioning groove 311, in order to facilitate the installation and positioning of the moving point block 32 on the lower magnetic guide 33, each side of the moving point block 32 along the first direction a is provided with a clearance opening 321, and the clearance opening 321 and the positioning groove 311 are correspondingly set along the first direction a.

[0041] Specifically, the moving point block 32 is provided with clearance openings 321 on both sides in the width direction (i.e., the first direction a). The clearance opening 321 is a notch that is recessed inward from the side of the moving point block 32. Furthermore, each side of the moving point block 32 is provided with two separate clearance openings 321 along the length direction of the moving point block 32, corresponding to the number of positioning posts 333. In this way, through the setting of clearance openings 321, the clearance openings 321 can be used as positioning references for the installation position of the moving point block 32 on the lower magnetic guide 33, making it easier to determine the position of the positioning posts 333 and improving the assembly efficiency of the moving point block 32, the lower magnetic guide 33 and the U-shaped basket 31.

[0042] Furthermore, the moving point block 32, the lower magnetic conductor 33, and the U-shaped basket 31 are riveted together by the riveting post 80. Specifically, the moving point block 32, the lower magnetic conductor 33, and the U-shaped basket 31 are each provided with corresponding riveting holes. The riveting post 80 passes through the riveting holes of the three in sequence and is fixed together by the riveting process. In this way, by riveting the moving point block 32, the lower magnetic conductor 33, and the U-shaped basket 31 together, the riveting connection is firm and reliable, ensuring the stability of the three. At the same time, the riveting method eliminates the need for additional fasteners (such as screws and nuts), reducing the number of parts and lowering the cost.

[0043] Please see Figure 4 , Figures 8 to 10 To ensure the stability of the U-shaped basket 31 in the vertical direction within the cover 50, a first guide member 312 is provided on at least one side of the U-shaped basket 31 along the first direction a, and a second guide member 51 is provided on the inner wall of the cover 50. The first guide member 312 and the second guide member 51 are slidably engaged. Specifically, the first guide member 312 is provided on both sides of the U-shaped basket 31 (both sides along the first direction a), and the second guide member 51 is provided at the corresponding position on the inner wall of the cover 50. Thus, the degree of freedom of the U-shaped basket 31 is restricted by the sliding engagement of the first guide member 312 and the second guide member 51, preventing the U-shaped basket 31 from being in a free state and preventing the U-shaped basket 31 from tilting or rotating.

[0044] The number of the first guide member 312 and the second guide member 51 can be one or more pairs.

[0045] Specifically, in this embodiment, the first guide member 312 is arc-shaped and bends towards the second guide member 51 and then towards the plastic base 12. The second guide member 51 is a guide rib with a square cross-section, and the side of the second guide member 51 facing the first guide member 312 has an arc-shaped surface. In this way, the arc-shaped first guide member 312 and the second guide member 51 have line contact or point contact, which reduces the contact friction between the two and improves the closing and opening accuracy between the moving point block 32 and the stationary contact 60.

[0046] Specifically, in this embodiment, the first guide member 312 is disposed on the side of the U-shaped basket 31 near the lower magnetic conductor 33. That is, when the first guide member 312 is formed, two bendable strips are cut from each end of the U-shaped basket 31 along the second direction b. The two bendable strips on each side are arranged opposite each other along the first direction a. Then, a bending force is applied to each bendable strip so that the bendable strip is bent into an arc shape. Furthermore, by disposing the first guide member 312 on the side of the U-shaped basket 31 near the lower magnetic conductor 33, since the U-shaped basket 31 has a flat plate structure connected to the lower magnetic conductor 33, the structural strength of the entire U-shaped basket 31 can still be guaranteed by cutting the bendable strip from the flat plate structure.

[0047] Please see Figure 4 , Figure 8 as well as Figure 9 In order to ensure the fitting accuracy between the U-shaped basket 31 and the steel sheet 20, the U-shaped basket 31 is provided with a sliding opening 313 for the steel sheet 20 to slide. Each end of the U-shaped basket 31 along the first direction a and on the side away from the elastic member 40 is provided with a rib 314. The rib 314 surrounds the sliding opening 313 and slides with the steel sheet 20. Specifically, the U-shaped basket 31 has sliding openings 313 at both ends along the first direction a (i.e., the bottom of the two side walls of the U-shape). The two ends of the steel sheet 20 are respectively inserted into the corresponding sliding openings 313, so that the U-shaped basket 31 can slide up and down along the steel sheet 20. Each end of the U-shaped basket 31 has a rib 314 on the side away from the elastic member 40 (i.e., the outer side). The rib 314 is arranged around the periphery of the sliding opening 313, and the inner surface of the rib 314 slides in contact with the surface of the steel sheet 20.

[0048] Thus, by using the sliding fit between the rib 314 and the steel sheet 20, the sliding contact area between the U-shaped basket 31 and the steel sheet 20 is increased, the contact stress is reduced, and the wear resistance is improved. At the same time, the rib 314 also increases the structural strength of the U-shaped basket 31 at the sliding opening 313. Furthermore, the rib 314 is formed by bending a portion of the U-shaped basket 31 away from the elastic member 40, which can form an arc-shaped surface that contacts the steel sheet 20. This avoids the increase in contact friction between the sliding opening 313 and the steel sheet 20 due to the burrs formed on the side wall of the sliding opening 313 when the sliding opening 313 is directly set at the U-shaped basket 31, thus avoiding affecting the motion accuracy of the driving U-shaped basket 31.

[0049] It should be noted that the high voltage DC contactor 100 in this embodiment also includes a yoke plate 70, a stationary contact 60, and a magnetic circuit drive system. By introducing inert gas into the housing 50 to form an isolation space, the push rod 11 is driven to slide relative to the yoke plate 70 through the magnetic circuit drive system, so as to realize the contact and disconnection of the moving block 32 and the stationary contact 60.

[0050] In this embodiment, the overtravel of the push rod 11 is achieved in the following manner: (1) First stage: After the installation of the high voltage DC contactor 100 is completed, the elastic element 40 is in a compressed state. When the push rod 11 moves upward, the lower magnetic conductor 33 is first supported by the elastic element 40 to push the U-shaped basket 31, the moving block 32 and the lower magnetic conductor 33 to move upward. (2) Second stage: When the moving block 32 and the stationary contact 60 are closed, the U-shaped basket 31, the moving block 32 and the lower magnetic conductor 33 can no longer move upward. The push rod 11 continues to move upward for a distance, and the steel plate 20 continues to slide in the sliding port 313. That is, at this time, the steel plate 20 continues to move upward. During the process of moving to the upper end of the sliding port 313, the elastic element 40 is further compressed. The extra movement distance of the push rod 11 in this segment is the overtravel.

[0051] Compared with the existing technology of riveting and fixing the U-shaped basket 31 and the fixing plate, the above-mentioned high-voltage DC contactor 100 has the following technical advantages: (1) The process of riveting the U-shaped basket 31 and the steel sheet 20 is avoided, reducing the riveting steps and reducing the assembly difficulty of the entire high voltage DC contactor 100; (2) In the prior art, the elastic element 40, the moving point block 32, and the lower magnetic guide 33 are installed inside the inverted U-shape of the U-shaped basket 31, which limits the assembly space and makes installation difficult. However, in this embodiment, the moving point block 32, the lower magnetic guide 33, and the U-shaped basket 31 are arranged sequentially from top to bottom, and the installation of the moving point block 32 and the lower magnetic guide 33 is not restricted, which reduces the installation difficulty. (3) By setting an arc-shaped first guide 312 outside the U-shaped basket 31 to cooperate with the guide structure on the inner wall of the cover 50, and setting a rib 314 in the sliding port 313 to cooperate with the steel sheet 20, the closing and opening accuracy between the moving block 32 and the stationary contact 60 is improved.

[0052] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. A high-voltage DC contactor, characterized in that, include: The push rod structure includes a push rod and a plastic base; A steel sheet is fixedly connected to the plastic base, and both ends of the steel sheet protrude from the plastic base along the first direction; The moving contact structure includes a U-shaped basket, a moving point block, and a lower magnetic guide. The U-shaped basket is inverted, and the two ends of the U-shaped basket are slidably engaged with the two ends of the steel sheet. The elastic element acts on the U-shaped basket and the plastic base at both ends.

2. The high-voltage DC contactor according to claim 1, characterized in that, The high-voltage DC contactor also includes a housing, the moving contact structure is disposed inside the housing, the U-shaped basket is provided with a first guide member on at least one side along the first direction, and a second guide member is provided on the inner wall of the housing, the first guide member and the second guide member are slidably engaged.

3. The high-voltage DC contactor according to claim 2, characterized in that, The first guide member is bent into an arc shape and then bent towards the second guide member and then towards the plastic base.

4. The high-voltage DC contactor according to claim 3, characterized in that, The first guide member is located on the side of the U-shaped basket near the lower magnetic guide member.

5. The high-voltage DC contactor according to any one of claims 1-4, characterized in that, The U-shaped basket is provided with a sliding opening for the steel sheet to slide. Each end of the U-shaped basket along the first direction and towards the side away from the elastic member is provided with a rib. The rib surrounds the sliding opening and slides with the steel sheet.

6. The high-voltage DC contactor according to any one of claims 1-4, characterized in that, The moving point block, the lower magnetic conductor, and the U-shaped basket are stacked sequentially from top to bottom, and the two ends of the lower magnetic conductor protrude from the moving point block along the first direction, wherein the first direction is the width direction of the moving point block.

7. The high-voltage DC contactor according to claim 6, characterized in that, The lower magnetic conductor is U-shaped and includes a connecting part and two attracting parts located at both ends of the connecting part in the first direction. The connecting part is connected to the moving point block and the U-shaped basket respectively. The two attracting parts are located on both sides of the moving point block along the first direction and extend upward.

8. The high-voltage DC contactor according to any one of claims 1-4, characterized in that, One of the lower magnetic conductor and the U-shaped basket is provided with a positioning post, and the other is provided with a positioning groove. The positioning post and the positioning groove are inserted into each other.

9. The high-voltage DC contactor according to claim 8, characterized in that, The moving point block is provided with a clearance opening on each side along the first direction, and the clearance opening and the positioning groove are provided correspondingly along the first direction.

10. The high-voltage DC contactor according to any one of claims 1-4, characterized in that, The moving point block, the lower magnetic conductor, and the U-shaped basket are riveted together and fixed by riveting posts.

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