Push rod assembly and high-voltage direct-current contactor

Abstract

The utility model discloses a push rod assembly and a high-voltage direct-current contactor, and relates to the technical field of high-voltage direct-current contactors, and the push rod assembly comprises a push rod, a base, a blocking member, an elastic member and a contact bridge. The base is arranged at the first end of the push rod and comprises a supporting structure, and the supporting structure is arranged on the side, away from the push rod, of the base. The blocking piece is arranged on the side, away from the base, of the supporting structure. The elastic piece is arranged on the side, away from the push rod, of the base, and the elastic piece is opposite to the blocking piece. The first side of the contact bridge is connected to the blocking piece, and the second side of the contact bridge is connected to the elastic piece. According to the push rod assembly and the high-voltage direct-current contactor provided by the invention, the assembly stability of the push rod assembly can be improved, so that the risk that the high-voltage direct-current contactor breaks down is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of high-voltage DC contactors, and in particular to a push rod assembly and a high-voltage DC contactor. Background Art

[0002] A high-voltage DC contactor consists of a coil, a push rod, a moving contact, a stationary contact, a moving iron core, and a spring. When the coil is energized, a magnetic field is generated, causing the moving iron core to move within the coil due to the magnetic force. This movement of the moving iron core drives the moving contact through the push rod, closing the moving contact with the stationary contact. When the coil is de-energized, the magnetic field disappears, and the moving iron core loses its magnetic force. The spring resets the moving iron core, simultaneously disconnecting the moving contact from the stationary contact through the push rod.

[0003] In the existing high-voltage DC contactor, the moving contact is sleeved on the push rod, one side of the moving contact abuts against the spring sleeved on the push rod, and the other side of the moving contact abuts against the retaining spring provided on the push rod. The positioning and installation of the moving contact are achieved by the spring and the retaining spring.

[0004] However, during the movement of the push rod, the retaining spring is easily broken and fails due to impact, resulting in poor assembly stability between the push rod and the moving contact, which directly affects the on-off performance of the high-voltage DC contactor and leads to a higher risk of electrical accidents. Utility Model Content

[0005] The purpose of the present application is to provide a push rod assembly and a high-voltage DC contactor, which can improve the assembly stability of the push rod assembly and thus reduce the risk of failure of the high-voltage DC contactor.

[0006] In a first aspect, an embodiment of the present application provides a push rod assembly comprising a push rod, a base, a blocking member, an elastic member, and a contact bridge. The base is disposed at a first end of the push rod and includes a support structure disposed on a side of the base facing away from the push rod. The blocking member is disposed on a side of the support structure facing away from the base. The elastic member is disposed on a side of the base facing away from the push rod, and the elastic member is opposite the blocking member. A first side of the contact bridge is connected to the blocking member, and a second side of the contact bridge is connected to the elastic member.

[0007] Based on the above-mentioned embodiments of the present application, a base is provided on the push rod, and a support structure is provided on the base for supporting the blocking member, and an elastic member is provided on the base for providing elastic force, and the elastic member is opposite to the blocking member so that the elastic force is directed toward the blocking member. In this way, the contact bridge can be installed between the elastic member and the blocking member, and the elastic force is used to clamp the contact bridge between the elastic member and the blocking member to achieve limited installation of the contact bridge, which is beneficial to improving the assembly stability of the contact bridge and reducing the risk of failure of the push rod assembly due to unstable installation of the contact bridge.

[0008] In some examples, the support structure includes a first support plate and a second support plate, the first support plate and the second support plate are spaced apart, and both the first support plate and the second support plate extend away from the base, and the blocking member is connected to the first support plate and the second support plate.

[0009] Based on the above-described embodiments of the present application, the support structure is configured as a first support plate and a second support plate spaced apart from each other. The first support plate and the second support plate cooperate to provide support at two spaced-apart locations simultaneously. Connecting a blocking member to the first support plate and the second support plate can effectively improve the assembly stability of the blocking member and the support structure, reducing the possibility of the blocking member breaking or detaching from the support structure due to uneven force, thereby ensuring that the blocking member can provide a stable limiting effect on the contact bridge, allowing the push rod assembly to operate normally in the high-voltage DC contactor.

[0010] In some examples, the first support plate is provided with a first connection structure, the second support plate is provided with a second connection structure, the blocking member is provided with a first connection portion and a second connection portion, the first connection structure is correspondingly connected to the first connection portion, and the second connection structure is correspondingly connected to the second connection portion.

[0011] Based on the above-mentioned embodiments of the present application, the blocking member is connected to the first connecting structure on the first support plate through the first connecting portion, and is connected to the second connecting structure on the second support plate through the second connecting portion, so that the blocking member can remain fixed relative to the first support plate and the second support plate.

[0012] In some examples, the support structure is configured as a cylinder.

[0013] Based on the aforementioned embodiments of this application, the support structure is configured as a cylinder. This cylindrical support structure can also create a mounting space on the base for installing the contact bridge and the blocking member. Furthermore, the cylindrical support structure can directly form a limiting space on the base through its own structure to restrict the movement of the contact bridge. This configuration can expand the scope of application and facilitate the stable assembly of the contact bridge and the base.

[0014] In some examples, the blocking member is provided with a first limiting portion, the contact bridge is provided with a second limiting portion, and the first limiting portion is correspondingly connected to the second limiting portion.

[0015] Based on the above-mentioned embodiments of the present application, the setting of the blocking member can limit the contact bridge from separating from the base in the direction where the blocking member is located, and the mutual cooperation between the first limiting portion and the second limiting portion can limit the relative movement of the contact bridge and the blocking member. In this way, the blocking member can provide a multi-directional limiting effect on the contact bridge, so that the contact bridge and the base can maintain a stable assembly.

[0016] In some examples, the contact bridge includes a main body and a contact connected to each other, the main body is provided with a first mounting groove, the first mounting groove is located on a side of the main body close to the base, and the first end of the elastic member is connected to the first mounting groove.

[0017] Based on the above-mentioned embodiments of the present application, by providing a first mounting groove on the main body of the contact bridge and connecting the first end of the elastic member to the first mounting groove, the relative movement between the elastic member and the contact bridge can be limited, ensuring that the elastic member and the contact bridge maintain a stable assembly relationship, and avoiding the elastic member and the contact bridge from separating from each other after being subjected to force, resulting in failure of the push rod assembly.

[0018] In some examples, the base is provided with a second mounting groove, the second mounting groove is opposite to the first mounting groove, and the second end of the elastic member is connected to the second mounting groove.

[0019] Based on the above-mentioned embodiments of the present application, the second mounting groove is provided for positioning the second end of the mounting elastic member. With the cooperation of the first mounting groove and the second mounting groove, the assembly stability of the elastic member on the base can be effectively improved, so that the elastic member can accurately apply elastic force to the contact bridge, so that the contact bridge can be stably installed on the base, thereby ensuring that the push rod assembly can work normally.

[0020] In some examples, the push rod assembly further includes a moving iron core, the moving iron core includes a connecting hole, and the push rod includes a threaded connecting portion, which is threadedly connected to the connecting hole.

[0021] Based on the above-mentioned embodiments of the present application, the push rod and the moving iron core are connected by threads, which effectively improves the assembly stability of the push rod and the moving iron core, so that the moving iron core can drive the push rod to move in time when moving, which is conducive to the normal operation of the push rod assembly.

[0022] In a second aspect, an embodiment of the present application further provides a high-voltage DC contactor, comprising the above-mentioned push rod assembly.

[0023] Based on the above-mentioned embodiments of the present application, the high-voltage DC contactor having the above-mentioned push rod assembly can effectively reduce the risk of failure of the high-voltage DC contactor due to the unstable structure of the push rod assembly itself, which is conducive to maintaining the stability of the switching performance of the high-voltage DC contactor.

[0024] In some examples, the high-voltage DC contactor includes a coil bobbin provided with a step, and a movable iron core in the push rod assembly is provided with a flange, and the flange can correspondingly abut against the step.

[0025] Based on the above-mentioned embodiments of the present application, by setting a step on the coil frame corresponding to the flange set on the moving iron core, the moving distance of the moving iron core can be limited during its movement, thereby limiting the moving distance of the push rod, and preventing the push rod from moving too long and hitting the shell, thereby reducing the possibility of the push rod assembly being subjected to a large impact force, which is conducive to maintaining the structural stability of the push rod assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 A schematic diagram of the overall structure of a high-voltage DC contactor provided in an embodiment of the present application.

[0028] Figure 2 An exploded diagram of a high-voltage DC contactor provided in an embodiment of the present application.

[0029] Figure 3 Schematic diagram of the matching structure of the coil skeleton and the moving iron core provided in an embodiment of the present application.

[0030] Figure 4 A schematic structural diagram of the push rod assembly provided in an embodiment of the present application.

[0031] Figure 5 An exploded view of the push rod assembly provided in an embodiment of the present application.

[0032] Figure 6 Schematic diagram of the connection structure between the push rod and the base provided in an embodiment of the present application.

[0033] Figure 7 An exploded view of the base and components installed on the base provided in an embodiment of the present application.

[0034] Figure 8 Provided in the embodiments of this application Figure 7 Another perspective.

[0035] Figure 9 A top view of the high-voltage DC contactor provided in an embodiment of the present application.

[0036] Figure 10 Provided in the embodiments of this application Figure 9 Cross-section view at AA in the middle.

[0037] Figure 11Schematic diagram of the installation structure of the moving iron core and the push rod provided in an embodiment of the present application.

[0038] Description of reference numerals:

[0039] 1. High-voltage DC contactor; 11. Housing; 12. Coil skeleton; 121. Through hole; 122. Step; 13. Static contact; 2. Push rod assembly; 21. Push rod; 211. Relief; 212. Threaded connection; 22. Base; 221. Support structure; 2211. First support plate; 2212. First connection structure; 2213. Second support plate; 2214. Second connection structure; 222. Plug hole; 223. Second mounting slot; 23. Blocking member; 231. First connection portion; 232. Second connection portion; 233. First limiting portion; 24. Elastic member; 25. Contact bridge; 251. Second limiting portion; 252. Main body; 253. Contact; 254. First mounting slot; 26. Moving iron core; 261. Flange; 262. Connection hole; 263. Accommodating cavity. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0043] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0044] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0045] A high-voltage DC contactor typically consists of a push rod, a moving contact, a coil, a stationary contact, and a moving iron core. The moving contact is connected to the first end of the push rod, and the moving iron core is connected to the second end. When the coil is energized, a magnetic field is generated, causing the moving iron core to move within the coil due to the magnetic force. Simultaneously, the moving iron core, through the push rod, drives the moving contact in sync, bringing them into contact with the stationary contact, thereby turning on the high-voltage DC contactor. When the coil is de-energized, the moving iron core returns to its pre-movement position and, through the push rod, drives the moving contact and the stationary contact apart, disconnecting the high-voltage DC contactor.

[0046] To achieve synchronized movement of the moving contact, push rod, and moving iron core, the moving contact and moving iron core must remain relatively fixed on the push rod. In existing high-voltage DC contactors, the moving contact is held in place on the push rod by a spring and a retaining spring. However, due to the poor structural stability of the retaining spring, it can easily break and fail under impact, leading to failure of the push rod assembly and, in turn, affecting the proper operation of the high-voltage DC contactor.

[0047] Based on this, the embodiments of the present application provide a push rod assembly and a high-voltage DC contactor, which can improve the assembly stability of the push rod assembly and thus reduce the risk of failure of the high-voltage DC contactor.

[0048] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

[0049] Figure 1 This is a schematic diagram of the overall structure of a high-voltage DC contactor provided in an embodiment of the present application. Figure 2 This is an exploded diagram of a high-voltage DC contactor provided in an embodiment of the present application. Figure 3 It is a schematic diagram of the matching structure of the coil skeleton and the moving iron core provided in an embodiment of the present application.

[0050] Reference Figures 1 to 3 The present application provides a high-voltage DC contactor 1, including a push rod assembly 2. In addition, the high-voltage DC contactor 1 also includes a housing 11, a coil assembly, and a static contact 13, and the coil assembly, the static contact 13, and the push rod assembly 2 are all installed in the housing 11.

[0051] The high-voltage DC contactor 1 having the push rod assembly 2 can effectively reduce the risk of failure of the high-voltage DC contactor 1 due to the unstable structure of the push rod assembly 2, which is conducive to maintaining stable switching performance of the high-voltage DC contactor 1.

[0052] Reference Figure 3 In some examples, the high-voltage DC contactor 1 includes a coil bobbin 12 , the coil bobbin 12 is provided with a step 122 , and the movable iron core 26 in the push rod assembly 2 is provided with a flange 261 , which can correspondingly abut against the step 122 .

[0053] Specifically, refer to Figures 1 to 3 The coil assembly includes a coil skeleton 12 and a conductive coil. The conductive coil is sleeved on the coil skeleton 12. The coil skeleton 12 is provided with a through hole 121. The moving iron core 26 in the push rod assembly 2 is located in the through hole 121. When the conductive coil is energized, a magnetic field will be generated at the through hole 121. Under the action of the magnetic field force, the moving iron core 26 can move in the through hole 121 along the axial direction of the through hole 121, thereby driving the push rod 21 to move.

[0054] Combine Figures 1 to 3 The step 122 is provided on the wall of the through hole 121, and the top surface of the step 122 faces the first end of the push rod 21, or in other words, faces the static contact 13 in the high-voltage DC contactor 1. The step 122 is provided so as to correspond to the flange 261 on the movable iron core 26, thereby limiting the range of movement of the movable iron core 26. The limited range of movement of the movable iron core 26 will also limit the range of movement of the push rod 21, thereby preventing the push rod 21 from moving too far and colliding with the housing 11.

[0055] In this embodiment, the moving iron core 26 is acted upon by the magnetic field force to drive the push rod 21 toward the static contact 13. At this time, the flange 261 of the moving iron core 26 gradually moves away from the step 122. When the magnetic field force disappears, the moving iron core 26 drives the push rod 21 to move away from the static contact 13. At this time, the flange 261 of the moving iron core 26 approaches and abuts the top surface of the step 122, thereby limiting the moving iron core 26 from continuing to move away from the static contact 13.

[0056] Based on the above-mentioned embodiments of the present application, by setting a step 122 on the coil skeleton 12, corresponding to the flange 261 set on the moving iron core 26, it can play a role in limiting the moving distance of the moving iron core 26 during the movement process, thereby limiting the moving distance of the push rod 21, and preventing the push rod 21 from moving too long and hitting the shell 11, thereby reducing the possibility of the push rod assembly 2 being subjected to a large impact force, which is beneficial for the push rod assembly 2 to maintain structural stability.

[0057] Reference Figures 4 to 6This embodiment provides a push rod assembly 2, comprising a push rod 21, a base 22, a blocking member 23, an elastic member 24, and a contact bridge 25. The base 22 is disposed at a first end of the push rod 21, and the base 22 includes a support structure 221. The support structure 221 is disposed on a side of the base 22 facing away from the push rod 21. The blocking member 23 is disposed on a side of the support structure 221 facing away from the base 22. The elastic member 24 is disposed on a side of the base 22 facing away from the push rod 21, and the elastic member 24 is opposite to the blocking member 23. The first side of the contact bridge 25 is connected to the blocking member 23, and the second side of the contact bridge 25 is connected to the elastic member 24.

[0058] Based on the above-mentioned embodiments of the present application, a base 22 is provided on the push rod 21, and a support structure 221 is provided on the base 22 for supporting the blocking member 23, and an elastic member 24 is provided on the base 22 for providing elastic force. The elastic member 24 is opposite to the blocking member 23 so that the elastic force is directed toward the blocking member 23. In this way, the contact bridge 25 can be installed between the elastic member 24 and the blocking member 23, and the contact bridge 25 is clamped between the elastic member 24 and the blocking member 23 by utilizing the elastic force to realize the limited installation of the contact bridge 25, which is beneficial to improve the assembly stability of the contact bridge 25 and reduce the risk of failure of the push rod assembly 2 due to unstable installation of the contact bridge 25.

[0059] Specifically, refer to Figure 6 The push rod 21 is set to a cylindrical rod, and the base 22 is set at the first end of the push rod 21. The base 22 and the push rod 21 can be set to an integrated structure, or they can be connected as a whole using other fixed connection methods, such as threaded connection, clamping or welding.

[0060] In the embodiment of the present application, the push rod 21 and the base 22 are connected in a plug-in manner. That is, the base 22 is provided with a plug-in hole 222, and the first end of the push rod 21 is plugged into the plug-in hole 222. The first end of the push rod 21 is provided with a ridge 211. This increases the friction between the push rod 21 and the wall of the plug-in hole 222, thereby reducing the possibility of the push rod 21 rotating in the plug-in hole 222 or being disengaged from the plug-in hole 222. Of course, the ridge 211 can also be provided on the wall of the plug-in hole 222 to similarly improve the connection stability.

[0061] The fixed connection between the push rod 21 and the base 22 enables the push rod 21 to drive the base 22 to move synchronously, thereby driving the contact bridge 25 provided on the base 22 to move through the base 22. Under the premise of maintaining a stable connection between the push rod 21 and the base 22, the synchronous movement of the push rod 21 and the contact bridge 25 is facilitated.

[0062] Further, refer to Figure 4 and Figure 5The support structure 221 is arranged on the side of the base 22 away from the push rod 21, and the blocking member 23 is arranged on the side of the support structure 221 away from the base 22. With this arrangement, the support structure 221 can provide support for the blocking member 23, so that the blocking member 23 is spaced apart from the base 22, thereby forming an installation space for installing the contact bridge 25 between the base 22 and the blocking member 23.

[0063] The support structure 221 can be configured as a support rod, a support plate, a support boss, etc. The support structure 221 and the base 22 can be integrally formed or connected as a whole using other fixed connection methods, such as welding or clamping.

[0064] The fixed connection between the support structure 221 and the base 22 is conducive to the support structure 221 providing a stable support effect, so that the blocking member 23 can be stably assembled on the base 22 and remain relatively fixed with the base 22, thereby forming a relatively stable installation space on the base 22.

[0065] Reference Figure 2 、 Figure 4 as well as Figure 5 The contact bridge 25 serves as a moving contact in the high-voltage DC contactor 1 , and may be provided with one or more contacts corresponding to the number of contacts on the static contact 13 .

[0066] The blocking member 23 is used to block the contact bridge 25, and the elastic member 24 is used to push the contact bridge 25. The elastic member 24 and the contact bridge 25 are both arranged in the installation space enclosed by the base 22, the support structure 221 and the blocking member 23. Figure 2 With the cooperation of the elastic member 24 and the blocking member 23, the contact bridge 25 can be clamped in the installation space. On the one hand, the contact stability between the contact bridge 25 and the static contact 13 can be improved. On the other hand, the contact bridge 25 can be prevented from being separated from the base 22, causing the push rod assembly 2 to fail, which is beneficial to improving the safety of the high-voltage DC contactor 1.

[0067] It should be noted that the elastic member 24 can be configured as an elastic component such as a spring or an elastic washer. In this embodiment, the elastic member 24 is configured as a spring, the first end of which abuts against the base 22, and the second end of which abuts against the contact bridge 25, thereby maintaining a distance between the contact bridge 25 and the base 22.

[0068] In some examples, reference Figure 7 and Figure 8 The support structure 221 includes a first support plate 2211 and a second support plate 2213. The first support plate 2211 and the second support plate 2213 are arranged at intervals, and the first support plate 2211 and the second support plate 2213 both extend in a direction away from the base 22, and the blocking member 23 is connected to the first support plate 2211 and the second support plate 2213.

[0069] Based on the above-mentioned embodiment of the present application, the support structure 221 is configured as a first support plate 2211 and a second support plate 2213 spaced apart from each other. The first support plate 2211 and the second support plate 2213 cooperate with each other to provide support at two spaced apart positions at the same time. Connecting the blocking member 23 to the first support plate 2211 and the second support plate 2213 can effectively improve the assembly stability of the blocking member 23 and the support structure 221, and reduce the possibility of the blocking member 23 breaking or detaching from the support structure 221 due to uneven force, thereby ensuring that the blocking member 23 can provide a stable limiting effect on the contact bridge 25, so that the push rod assembly 2 can operate normally in the high-voltage DC contactor 1.

[0070] Specifically, combined Figure 4 and Figure 7 The first support plate 2211 and the second support plate 2213 are spaced apart, and the first support plate 2211 is opposite to the second support plate 2214 . The first support plate 2211 and the second support plate 2213 are both perpendicular to the surface of the base 22 .

[0071] The blocking member 23 is connected to the first support plate 2211 and the second support plate 2213, and is located between the first support plate 2211 and the second support plate 2213. The first support plate 2211 and the second support plate 2213 can provide support for the blocking member 23 while clamping the blocking member 23 between the first support plate 2211 and the second support plate 2213, so that the blocking member 23 is stably assembled on the support structure 221.

[0072] In an alternative embodiment, the first support plate 2211 and the second support plate 2213 may be arranged to be non-perpendicular to the base 22, and the angle between the first support plate 2211 and the second support plate 2213 may be set to an acute angle, for example, the first support plate 2211 and the second support plate 2213 are arranged at a 30° angle. In this manner, the blocking member 23 can also be installed between the first support plate 2211 and the second support plate 2213, providing stable support for the blocking member 23 and expanding its scope of application.

[0073] In this embodiment, the first support plate 2211 and the second support plate 2213 can be embedded in the base 22. Specifically, the base 22 is configured as a plastic part, and the first support plate 2211 and the second support plate 2213 are embedded in the base 22 during the injection molding process of the base 22. In this way, the base 22, the first support plate 2211 and the second support plate 2213 form an integrated structure, which has higher structural stability.

[0074] In some examples, the connection between the blocking member 23 and the first support plate 2211 and the second support plate 2213 can be achieved by welding, clamping or riveting. The above connection methods can enable the blocking member 23 to be stably assembled on the first support plate 2211 and the second support plate 2213, effectively reducing the risk of the blocking member 23 breaking or detaching.

[0075] In other examples, refer to Figure 7 and Figure 8 The first support plate 2211 is provided with a first connecting structure 2212, the second support plate 2213 is provided with a second connecting structure 2214, the blocking member 23 is provided with a first connecting portion 231 and a second connecting portion 232, the first connecting structure 2212 is correspondingly connected to the first connecting portion 231, and the second connecting structure 2214 is correspondingly connected to the second connecting portion 232.

[0076] Based on the above-mentioned embodiments of the present application, the blocking member 23 is correspondingly connected to the first connecting structure 2212 on the first support plate 2211 through the first connecting portion 231, and is correspondingly connected to the second connecting structure 2214 on the second support plate 2213 through the second connecting portion 232, so that the blocking member 23 can remain fixed relative to the first support plate 2211 and the second support plate 2213.

[0077] Among them, reference Figure 7 The blocking member 23 is configured as a baffle, and the first connecting portion 231 and the second connecting portion 232 are relatively arranged on both sides of the baffle, respectively corresponding to the first support plate 2211 and the second support plate 2213 that are spaced apart.

[0078] In this embodiment, the first connecting structure 2212 can be configured as a first connecting hole, and the first connecting portion 231 can be configured as a first connecting boss. The shape and size of the first connecting boss are the same as those of the first connecting hole, and the first connecting boss is inserted into the first connecting hole to maintain relative fixation between the blocking member 23 and the first support plate 2211.

[0079] Similarly, the second connecting structure 2214 can be configured as a second connecting hole, and the second connecting portion 232 can be configured as a second connecting boss. The shape and size of the second connecting boss are the same as those of the second connecting hole, and the second connecting boss is inserted into the second connecting hole to maintain relative fixation between the blocking member 23 and the second support plate 2213.

[0080] The blocking member 23 is relatively fixed to both the first support plate 2211 and the second support plate 2213, thereby maintaining a relatively fixed position relative to the base 22 to form a stable installation space. Furthermore, the support and position-limiting effects of the first support plate 2211 and the second support plate 2213 on the blocking member 23 help improve the structural stability of the blocking member 23, thereby reducing the risk of failure of the blocking member 23.

[0081] In an alternative embodiment, the first connecting structure 2212 and the first connecting portion 231 can be reversed, i.e., the first connecting structure 2212 is configured as a first connecting boss, and the first connecting portion 231 is configured as a first connecting hole. Similarly, the second connecting structure 2214 and the second connecting portion 232 can also be reversed. This arrangement can also achieve a stable connection between the first support structure 221 and the blocking member 23, achieving the same technical effect, and will not be further described here.

[0082] In some examples, the support structure 221 may be configured as a cylinder (not shown).

[0083] Based on the aforementioned embodiments of this application, the support structure 221 is configured as a cylinder. This cylindrical support structure 221 can also form a mounting space on the base 22 for mounting the contact bridge 25 and the blocking member 23. Furthermore, the cylindrical support structure 221 can also directly form a limiting space on the base 22 through its own structure to restrict the movement of the contact bridge 25. This configuration can expand the scope of application and facilitate the stable assembly of the contact bridge 25 and the base 22.

[0084] Specifically, the cylindrical support structure 221 can be provided as a single unit, i.e., the cylindrical wall of the cylindrical support structure 221 is connected to the base 22. The bottom wall of the cylindrical support structure 221 is provided on the side of the cylindrical wall away from the base 22. A limiting groove can be provided on the cylindrical wall, and the contact bridge 25 can be installed in the limiting groove. The contact bridge 25 can be directly limited by the cylindrical support structure 221, eliminating the need for a separate blocking member 23, thereby reducing the number of assembly steps.

[0085] In some examples, reference Figure 7 and Figure 8 The blocking member 23 is provided with a first limiting portion 233 , and the contact bridge 25 is provided with a second limiting portion 251 . The first limiting portion 233 is correspondingly connected to the second limiting portion 251 .

[0086] Based on the above-mentioned embodiments of the present application, the setting of the blocking member 23 can limit the contact bridge 25 from separating from the base 22 in the direction where the blocking member 23 is located, and the mutual cooperation between the first limiting portion 233 and the second limiting portion 251 can limit the relative movement of the contact bridge 25 and the blocking member 23. In this way, the blocking member 23 can provide a multi-directional limiting effect on the contact bridge 25, so that the contact bridge 25 and the base 22 can maintain a stable assembly.

[0087] In this embodiment, referring to Figure 7 The first limiting portion 233 is a limiting hole opened on the blocking member 23, and the second limiting portion 251 is a limiting column set on the contact bridge 25. The limiting column can be inserted into the limiting hole to limit the relative movement between the contact bridge 25 and the blocking member 23.

[0088] The shape and size of the retaining hole match those of the retaining post. In this embodiment, the retaining post is a cylindrical shape, and the retaining hole is a waist-shaped hole. During assembly to the base 22, the contact bridge 25 is inserted into the waist-shaped hole by the cylindrical shape, thereby achieving positional retention with the stopper 23. The waist-shaped hole provides some margin for smooth insertion of the cylindrical retaining post, reducing assembly difficulty.

[0089] In another embodiment, the limiting hole of the first limiting portion 233 can be swapped with the limiting column structure of the second limiting portion 251 , which can also achieve the limiting effect on the contact bridge 25 .

[0090] In some examples, reference Figure 7 and Figure 8 The contact bridge 25 includes a main body 252 and a contact 253 connected to each other. The main body 252 is provided with a first mounting groove 254 . The first mounting groove 254 is located on a side of the main body 252 close to the base 22 . The first end of the elastic member 24 is connected to the first mounting groove 254 .

[0091] Based on the above-mentioned embodiments of the present application, by providing a first mounting groove 254 on the main body 252 of the contact bridge 25 and connecting the first end of the elastic member 24 to the first mounting groove 254, the relative movement between the elastic member 24 and the contact bridge 25 can be limited, ensuring that the elastic member 24 and the contact bridge 25 maintain a stable assembly relationship, and avoiding the elastic member 24 and the contact bridge 25 from separating from each other after being subjected to force, thereby preventing the push rod assembly 2 from failing.

[0092] The contact bridge 25 comprises a connected main body 252 and contacts 253. Two contacts 253 are typically provided, positioned opposite each other at opposite ends of the main body 252. The limiting post in the aforementioned embodiment is provided on the main body 252, on the side of the main body 252 proximate to the blocking member 23, to limit the position of the contact bridge 25 and the blocking member 23. The first mounting groove 254 is provided on the side of the main body 252 proximate to the base 22, and the elastic member 24 is provided on the side of the contact bridge 25 proximate to the base 22. Therefore, the elastic member 24 can be connected to the first mounting groove 254 to limit the position of the elastic member 24 and the contact bridge 25.

[0093] Reference Figure 8 When the elastic member 24 is set as a spring, the first end of the spring is inserted into the first mounting groove 254, so that the elastic force direction of the spring and the axial direction of the first mounting groove 254 can be kept in the same direction, which is conducive to reducing the possibility of the spring detaching from between the contact bridge 25 and the base 22, and improving the assembly stability of the spring.

[0094] The first mounting groove 254 is configured as a circular groove for fitting a circular spring to provide accurate limiting effect on the spring.

[0095] In some examples, reference Figure 7 and Figure 8 The base 22 defines a second mounting groove 223 , which is opposite to the first mounting groove 254 , and the second end of the elastic member 24 is connected to the second mounting groove 223 .

[0096] Based on the above-mentioned embodiment of the present application, the second mounting groove 223 is provided for positioning the second end of the elastic member 24. With the cooperation of the first mounting groove 254 and the second mounting groove 223, the assembly stability of the elastic member 24 on the base 22 can be effectively improved, so that the elastic member 24 can accurately apply elastic force to the contact bridge 25, so that the contact bridge 25 can be stably installed on the base 22, thereby ensuring that the push rod assembly 2 can work normally.

[0097] The second mounting groove 223 is defined on the side of the base 22 facing away from the push rod 21. The second mounting groove 223 and the first mounting groove 254 are coaxial. When the elastic member 24 is configured as a spring, the first end of the spring is inserted into the first mounting groove 254, and the second end of the spring is inserted into the second mounting groove 223. This confines the spring between the contact bridge 25 and the base 22, further enhancing the assembly stability of the elastic member 24 on the base 22.

[0098] In some examples, reference Figure 9 and Figure 10 The push rod assembly 2 further includes a moving iron core 26 , which includes a connecting hole 262 . The push rod 21 includes a threaded connecting portion 212 , which is threadedly connected to the connecting hole 262 .

[0099] Based on the above-mentioned embodiments of the present application, the push rod 21 and the moving iron core 26 are connected by threads, which effectively improves the assembly stability of the push rod 21 and the moving iron core 26, so that the moving iron core 26 can drive the push rod 21 to move in time when moving, which is conducive to the normal operation of the push rod assembly 2.

[0100] Specifically, the connection hole 262 is provided in the middle of the movable iron core 26, and the push rod 21 corresponds to the connection hole 262. The push rod 21 is inserted into the connection hole 262 and fixedly connected to the connection hole 262 via the threaded connection portion 212. The threaded connection can achieve a tight connection between the push rod 21 and the movable iron core 26, effectively reducing the risk of the push rod 21 and the movable iron core 26 being separated under the action of external force, thereby improving the stability of the push rod assembly 2.

[0101] Reference Figure 10In conjunction with the structure of the aforementioned high-voltage DC contactor 1, the movable iron core 26 is disposed in the through-hole 121 of the coil bobbin 12. When the conductive coil on the coil bobbin 12 is energized, a magnetic field is generated. The movable iron core 26 can move under the action of the magnetic field, thereby driving the push rod 21 to move synchronously. This allows the push rod 21 to drive the contact bridge 25 into contact with the static contact 13 to achieve conduction of the high-voltage DC contactor 1. Therefore, the fixed connection between the push rod 21 and the movable iron core 26 can significantly improve the operating stability of the high-voltage DC contactor 1 and reduce the risk of failure of the high-voltage DC contactor 1.

[0102] In some examples, reference Figure 10 and Figure 11 The moving iron core 26 is provided with an accommodating cavity 263 , which is communicated with the connecting hole 262 , and the second end of the push rod 21 is located in the accommodating cavity 263 .

[0103] Based on the above-mentioned embodiment of the present application, the arrangement of the accommodating cavity 263 can, on the one hand, accommodate the second end of the push rod 21, thereby preventing the second end of the push rod 21 from colliding with other components and causing damage to the push rod 21. On the other hand, the second end of the push rod 21 can be fixed in the accommodating cavity 263 by dispensing glue, further improving the stability of the connection between the push rod 21 and the movable iron core 26.

[0104] The accommodating cavity 263 is disposed on the side of the movable iron core 26 away from the base 22, i.e., on the side proximal to the second end of the push rod 21. The accommodating cavity 263 is in communication with the connecting hole 262. After the push rod 21 is threadedly connected to the connecting hole 262, the second end of the push rod 21 extends from the connecting hole 262 and resides in the accommodating cavity 263. The length of the second end of the push rod 21 within the accommodating cavity 263 can be less than the depth of the accommodating cavity 263. This prevents the push rod 21 from colliding with the housing 11 during movement due to an excessive length of the push rod 21, thereby improving the structural stability of the push rod assembly 2.

[0105] In one embodiment, after the push rod 21 and the moving iron core 26 are assembled, they can be encapsulated in the accommodating cavity 263 using a glue dispensing process. The solidified colloid further strengthens the fixed connection between the push rod 21 and the moving iron core 26, ensuring that the push rod 21 can move synchronously with the moving iron core 26, so that the high-voltage DC contactor 1 can be opened or closed in time.

[0106] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A push rod assembly, characterized in that: include: Push rod; a base, disposed at the first end of the push rod, the base comprising a support structure, the support structure being disposed on a side of the base away from the push rod; a blocking member, disposed on a side of the supporting structure away from the base; an elastic member, disposed on a side of the base away from the push rod, and the elastic member is opposite to the blocking member; A contact bridge, wherein a first side of the contact bridge is connected to the blocking member, and a second side of the contact bridge is connected to the elastic member.

2. The push rod assembly according to claim 1, characterized in that The support structure includes a first support plate and a second support plate, the first support plate and the second support plate are spaced apart, and both the first support plate and the second support plate extend in a direction away from the base, and the blocking member is connected to the first support plate and the second support plate.

3. The push rod assembly according to claim 2, wherein: The first support plate is provided with a first connecting structure, the second support plate is provided with a second connecting structure, the blocking member is provided with a first connecting portion and a second connecting portion, the first connecting structure is correspondingly connected to the first connecting portion, and the second connecting structure is correspondingly connected to the second connecting portion.

4. The push rod assembly according to claim 1, wherein: The support structure is configured in a cylindrical shape.

5. The push rod assembly according to any one of claims 1 to 4, characterized in that: The blocking member is provided with a first limiting portion, and the contact bridge is provided with a second limiting portion, and the first limiting portion is correspondingly connected to the second limiting portion.

6. The push rod assembly according to any one of claims 1 to 4, characterized in that: The contact bridge includes a main body and a contact connected to each other. The main body is provided with a first mounting groove. The first mounting groove is located on a side of the main body close to the base. The first end of the elastic member is connected to the first mounting groove.

7. The push rod assembly according to claim 6, wherein: The base is provided with a second mounting groove, the second mounting groove is opposite to the first mounting groove, and the second end of the elastic member is connected to the second mounting groove.

8. The push rod assembly according to any one of claims 1 to 4, characterized in that: The push rod assembly further includes a moving iron core, the moving iron core includes a connecting hole, and the push rod includes a threaded connecting portion, which is threadedly connected to the connecting hole.

9. A high voltage DC contactor, characterized in that: A push rod assembly comprising any one of claims 1-8.

10. The high-voltage DC contactor according to claim 9, characterized in that: The high-voltage DC contactor includes a coil skeleton, the coil skeleton is provided with a step, and the moving iron core in the push rod assembly is provided with a flange, and the flange can correspondingly abut against the step.

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