Resistor connecting assembly and contactor

Abstract

The utility model provides a resistor connecting assembly and a contactor. The resistor connecting assembly comprises a resistor wire and a first connecting plate. The first connecting plate is connected to the pre-charging contact, and a first boss is arranged on the first connecting plate; the resistance wire is a bendable metal wire, the first end of the resistance wire is bent to be annular, the annular resistance wire is arranged on the first boss in a sleeving mode, the resistance wire is prevented from falling off from the first boss, and first fixed connection between the resistance wire and the pre-charging contact is achieved. The end, connected with the first end, of the first connecting plate is a first wiring end, a first wire containing groove is formed between the first boss and the first wiring end, and the resistance wire is welded and fixed in the first wire containing groove, so that second fixed connection between the resistance wire and the pre-charging contact is achieved, and the reliability of connection between the resistance wire and the pre-charging contact is further improved; the problem that due to poor contact between a resistance wire and a pre-charging contact, the pre-charging contact cannot achieve the inrush current restraining effect is solved.

Description

Technical Field

[0001] The present application relates to the technical field of contactors, and in particular to a resistor connection component and a contactor. Background Art

[0002] Contactors are generally connected to electrical equipment such as relays and capacitors. Among them, the contactor connected to the capacitor is used to switch the capacitor on and off. Since the capacitor will generate extremely high inrush current at the moment of connection, it will affect the service life of the capacitor and the contactor. In order to extend the service life of the capacitor and the contactor, pre-charged contacts are generally connected in parallel at both ends of the contactor. When the contactor coil is energized and attracted, the pre-charged contact will close in advance, and the inrush current generated by the capacitor will flow through the pre-charged contact and will not flow through the main contact. In addition, a resistance line with high impedance is connected between the pre-charged contact and the contactor to suppress the inrush current. When the current is reduced to a safe value, the contactor will connect the operating current of the load-bearing capacitor.

[0003] In the related art, the resistance wire is connected between the contactor and the pre-charged contact through a wiring lug, the resistance wire is riveted onto the wiring lug, and the wiring lug and the pre-charged contact are tightened and connected by a wiring screw. Riveting is to compress the resistance wire by deforming the metal of the wiring lug. The transition resistance at the connection position is not stable, which can easily lead to temperature rise; and the reliability of riveting is greatly affected by pressure. If the pressure is too small, it will not be pressed tightly, and if the pressure is too large, it will damage the resistance wire, resulting in poor contact between the resistance wire and the wiring lug. And because the contactor is frequently operated for a long time, the wiring screws are easy to loosen, and the wiring lug and the pre-charged contact are also easy to have poor contact. Whether the contact between the resistance wire and the wiring lug is poor or the contact between the wiring lug and the pre-charged contact is poor, it is a manifestation of poor contact between the resistance wire and the pre-charged contact. Poor contact between the resistance wire and the pre-charged contact will cause the pre-charged contact to fail to suppress the inrush current, thereby burning the contactor or even the capacitor. Utility Model Content

[0004] The present application provides a resistor connection assembly and a contactor to solve the problem that the pre-charge contact cannot suppress the surge current due to poor contact between the resistor wire and the pre-charge contact, thereby achieving a reliable connection between the resistor wire and the pre-charge contact.

[0005] In a first aspect, the present application provides a resistor connection assembly, connected between a contactor and a pre-charged contact, the resistor connection assembly comprising: a resistor wire and a first connecting plate; the first connecting plate is connected to the pre-charged contact, and a first boss is provided on the first connecting plate; the resistor wire is a bendable metal wire, the first end of the resistor wire is bent into a ring shape, the ring-shaped resistor wire is sleeved on the first boss, so that the first end of the resistor wire is electrically connected to the first connecting plate; the end of the first connecting plate connected to the first end is a first wiring terminal, a first wire accommodating groove is provided between the first boss and the first wiring terminal, and the resistor wire is welded and fixed in the first wire accommodating groove.

[0006] According to the first aspect, the resistor connection assembly includes a resistor wire and a first connecting plate. The resistor wire is a bendable metal wire, so that the resistor wire can be bent, the first end of the resistor wire is bent into a ring shape, and the ring-shaped resistor wire is sleeved on the first boss to prevent the resistor wire from falling from the first boss. Since the first boss is arranged on the first connecting plate, and the first connecting plate is connected to the pre-filled contact, the first fixed connection between the resistor wire and the pre-filled contact is realized. A first wire-accommodating groove is provided between the first boss and the first terminal, and the first terminal is an end connected to the first connecting plate and the first end of the resistor wire. The resistor wire is welded and fixed in the first wire-accommodating groove, and the second fixed connection between the resistor wire and the pre-filled contact is realized, further improving the reliability of the connection between the resistor wire and the pre-filled contact, so as to solve the problem in the related art that the pre-filled contact cannot suppress the inrush current due to poor contact between the resistor wire and the pre-filled contact, and realize a reliable connection between the resistor wire and the pre-filled contact.

[0007] In a possible design, the resistor connection assembly also includes a second connecting plate; the second connecting plate is connected to the contactor, and a second boss is provided on the second connecting plate; the second end of the resistor wire is bent into a ring shape, and the ring-shaped resistor wire is sleeved on the second boss, so that the second end of the resistor wire is electrically connected to the second connecting plate; the end of the second connecting plate connected to the second end is a second wiring terminal, and a second wire accommodating groove is provided between the second boss and the second wiring terminal, and the resistor wire is welded and fixed in the second wire accommodating groove.

[0008] According to the embodiment, a second connecting plate is provided on the contactor, a second boss is provided on the second connecting plate, and the second end of the bendable resistor wire is bent into a ring shape, and the ring-shaped resistor wire is sleeved on the second boss to prevent the resistor wire from falling off the second boss. Since the second boss is provided on the second connecting plate and the second connecting plate is connected to the contactor, the first fixed connection between the resistor wire and the contactor is achieved. A second wire-accommodating groove is provided between the second boss and the second terminal, and the second terminal is an end of the second connecting plate connected to the second end of the resistor wire. The resistor wire is welded and fixed in the second wire-accommodating groove, and the second fixed connection between the resistor wire and the contactor is achieved, further improving the reliability of the connection between the resistor wire and the contactor. While achieving a reliable connection between the resistor wire and the pre-filled contact, the reliability of the connection between the resistor wire and the contactor is also improved, so that the connection between the pre-filled contact and the contactor is more stable and reliable.

[0009] In a possible design, a first clamping groove is provided on the outer side of the first boss, and the first clamping groove surrounds the first boss; the first end is sleeved and clamped in the first clamping groove to prevent the resistance wire from falling off the first boss; a second clamping groove is provided on the outer side of the second boss, and the second clamping groove surrounds the second boss; the second end is sleeved and clamped in the second clamping groove to prevent the resistance wire from falling off the second boss.

[0010] According to the embodiment, a first card slot is arranged around the outside of the first boss, so that when the first end of the resistance wire is sleeved on the first boss, it can be snapped and fixed in the first card slot, making the first fixed connection between the resistance wire and the pre-filled contact more stable. Similarly, a second card slot is arranged around the outside of the second boss, so that when the second end of the resistance wire is sleeved on the second boss, it can be snapped and fixed in the second card slot, making the first fixed connection between the resistance wire and the contactor more stable. By strengthening the first fixed connection between the resistance wire and the pre-filled contact, and the first fixed connection between the resistance wire and the contactor, the electrical connection between the pre-filled contact and the contactor is more stable and reliable, so that the pre-filled contact can achieve a good effect of suppressing surge current.

[0011] In a possible design, the first clamping groove is arranged at the bottom of the first boss; and the second clamping groove is arranged at the bottom of the second boss.

[0012] According to the embodiment, after the first end of the resistor wire is sleeved on the first clamping groove, it needs to extend into the first wire-accommodating groove. In the height direction of the first boss, the distance between the bottom of the first boss and the first wire-accommodating groove is closer. When the resistor wire extends from the first clamping groove set at the bottom of the first boss to the first wire-accommodating groove, the amount of the resistor wire extending into the first clamping groove can be saved. Similarly, after the second end of the resistor wire is sleeved on the second clamping groove, it needs to extend into the second wire-accommodating groove. In the height direction of the second boss, the distance between the bottom of the second boss and the second wire-accommodating groove is closer. When the resistor wire extends from the second clamping groove set at the bottom of the second boss to the second wire-accommodating groove, the amount of the resistor wire extending into the second clamping groove can be saved. Thus, the purpose of reducing production costs is achieved.

[0013] In a possible design, along the opening direction of the first wire-accommodating groove, the height between the bottom surface of the first wire-accommodating groove and the top surface of the first connecting plate gradually increases; at the end close to the first boss, the bottom surface of the first wire-accommodating groove and the top surface of the first connecting plate are at a first distance; at the end close to the first wiring terminal, the bottom surface of the first wire-accommodating groove and the top surface of the first connecting plate are at a second distance; the second distance is greater than the first distance; along the opening direction of the second wire-accommodating groove, the height between the bottom surface of the second wire-accommodating groove and the top surface of the second connecting plate gradually increases; at the end close to the second boss, the bottom surface of the second wire-accommodating groove and the top surface of the second connecting plate are at a third distance; at the end close to the second wiring terminal, the bottom surface of the second wire-accommodating groove and the top surface of the second connecting plate are at a fourth distance; the fourth distance is greater than the third distance.

[0014] According to the embodiment, the second distance is the distance between the bottom surface of the first wire-accommodating groove and the top surface of the first connecting plate at one end of the first wire-accommodating groove close to the first terminal; the first distance is the distance between the bottom surface of the first wire-accommodating groove and the top surface of the first connecting plate at one end of the first wire-accommodating groove close to the first boss; when the second distance is greater than the first distance, it means that the depth of the first wire-accommodating groove gradually deepens from the first boss to the first terminal, and the resistance wire is welded in the area with a deeper depth of the first wire-accommodating groove, so that the top of the resistance wire is completely immersed in the first wire-accommodating groove, so as to prevent the resistance wire from being broken by the welding electrode during welding, and make the second fixed connection between the resistance wire and the pre-charged contact more stable. Similarly, the fourth distance is the distance between the bottom surface of the second wire-accommodating groove and the top surface of the second connecting plate at one end of the second wire-accommodating groove close to the second terminal; the third distance is the distance between the bottom surface of the second wire-accommodating groove and the top surface of the second connecting plate at one end of the second wire-accommodating groove close to the second boss; when the fourth distance is greater than the third distance, it means that the depth of the second wire-accommodating groove gradually deepens from the second boss to the second terminal, and the resistance wire is welded in the area with a deeper depth of the second wire-accommodating groove, so that the top of the resistance wire is completely immersed in the second wire-accommodating groove, so as to prevent the resistance wire from being broken by the welding electrode during welding, so that the second fixed connection between the resistance wire and the contactor is more stable.

[0015] In a possible design, the first wire accommodating groove includes a first side wall and a second side wall arranged opposite to each other, and the first side wall and the second side wall are two inclined surfaces intersecting at the bottom of the first wire accommodating groove; the second wire accommodating groove includes a third side wall and a fourth side wall arranged opposite to each other, and the third side wall and the fourth side wall are two inclined surfaces intersecting at the bottom of the second wire accommodating groove.

[0016] According to the embodiment, the first side wall and the second side wall are two inclined surfaces intersecting at the bottom of the first wire-accommodating groove, which provide a guide for the process of pressing the resistor wire into the first wire-accommodating groove. Since the first side wall and the second side wall intersect at the bottom of the first wire-accommodating groove, the distance between the first side wall and the second side wall is the smallest at the bottom of the first wire-accommodating groove, so that the welding point between the resistor wire and the first wire-accommodating groove is minimized, and accurate welding of the resistor wire is achieved to improve the reliability of the connection between the resistor wire and the pre-charged contact. Similarly, the third side wall and the fourth side wall are two inclined surfaces intersecting at the bottom of the second wire-accommodating groove, which provide a guide for the process of pressing the resistor wire into the second wire-accommodating groove. Since the third side wall and the fourth side wall intersect at the bottom of the second wire-accommodating groove, the distance between the third side wall and the fourth side wall is the smallest at the bottom of the second wire-accommodating groove, so that the welding point between the resistor wire and the second wire-accommodating groove is minimized, and accurate welding of the resistor wire is achieved to improve the reliability of the connection between the resistor wire and the contactor.

[0017] In a possible design, the minimum distance between the bottom of the first side wall and the bottom of the second side wall is the diameter of the resistance wire; the minimum distance between the bottom of the third side wall and the bottom of the fourth side wall is the diameter of the resistance wire.

[0018] By setting the minimum distance between the bottom of the first side wall and the bottom of the second side wall to the diameter of the resistor wire, it is possible to ensure that the resistor wire can contact the bottom of the first wire-accommodating groove, so that the contact area between the resistor wire and the first wire-accommodating groove is maximized, thereby making the connection between the resistor wire and the pre-charged contact more stable. Similarly, the minimum distance between the bottom of the third side wall and the bottom of the fourth side wall is set to the diameter of the resistor wire, which can ensure that the resistor wire can contact the bottom of the second wire-accommodating groove, so that the contact area between the resistor wire and the second wire-accommodating groove is maximized, thereby making the connection between the resistor wire and the contactor more stable.

[0019] In a second aspect, the present application provides a contactor, comprising: a resistance connection assembly, a contactor body and a pre-filled contact according to any one of the above embodiments; the contactor body is connected to the first connecting plate of the resistance connection assembly; the pre-filled contact is connected to the second connecting plate of the resistance connection assembly; or; the contactor body is connected to the second connecting plate of the resistance connection assembly; the pre-filled contact is connected to the first connecting plate of the resistance connection assembly.

[0020] In one possible design, the contactor includes two resistor connection components, which are used to connect the pre-charged contacts in parallel to the contactor body; one resistor connection component is connected between the current inlet of the contactor body and the current outlet of the pre-charged contacts; and another resistor connection component is connected between the current outlet of the contactor body and the current inlet of the pre-charged contacts.

[0021] Through the implementation, a resistor connecting component is connected between the current inlet of the contactor body and the current outlet of the pre-charge contact, and at the same time, another resistor connecting component is connected between the current outlet of the contactor body and the current inlet of the pre-charge contact, so that the pre-charge contact is connected in parallel to the contactor body, so that the surge current flows through the resistor wire and the pre-charge contact, and does not flow through the contactor body, thereby achieving the purpose of the pre-charge contact protecting the contactor from being burned by the surge current.

[0022] The beneficial effects provided in the above-mentioned second aspect and various possible designs of the above-mentioned second aspect can refer to the beneficial effects brought about by the above-mentioned first aspect and various possible implementation methods of the first aspect, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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 description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 A structural schematic diagram and a partial enlarged view of a resistor connection assembly in an embodiment of the present application;

[0025] Figure 2 A schematic diagram of the structure of the first connecting plate (second connecting plate) in the embodiment of the present application;

[0026] Figure 3 for Figure 1 A structural schematic diagram and a partial magnified view from a second perspective;

[0027] Figure 4 Another structural schematic diagram of a resistor connection assembly in an embodiment of the present application;

[0028] Figure 5 Another structural schematic diagram of the first connecting plate (second connecting plate) in the embodiment of the present application;

[0029] Figure 6 A schematic diagram of the structure of a contactor in an embodiment of the present application.

[0030] Description of reference numerals:

[0031] 100-resistance connection assembly;

[0032] 1-first connecting plate; 11-first boss; 111-first clamping groove; 12-first wire accommodating groove; 121-first side wall; 122-second side wall;

[0033] 2-second connecting plate; 21-second boss; 211-second clamping groove; 22-second wire accommodating groove; 221-third side wall; 222-fourth side wall;

[0034] 3-resistance wire; 31-first end; 32-second end; 33-ring resistance wire;

[0035] 4-U-type terminal block; 41-heat shrink tube;

[0036] 200-contactor body;

[0037] 300-Pre-charged contacts. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0040] The terms "comprising" and "having" and any variations thereof in the specification, claims and drawings of this application are intended to cover but not exclude other contents. The word "a" or "an" does not exclude the presence of a plurality.

[0041] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0043] The directional words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the present application. For example, in the description of the present application, the directions or positional relationships indicated by the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application.

[0044] In addition, the expressions of the indicated directions, such as the X direction, the Y direction, and the Z direction, used to illustrate the operation and construction of the components of the present embodiment are not absolute but relative, and although these indications are appropriate when the components of the battery pack are in the positions shown in the figures, when these positions change, these directions should be interpreted differently to correspond to the changes.

[0045] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0046] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0047] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a fixing member, such as a fixed connection through a screw, bolt or other fixing member; the physical connection may also be a detachable connection, such as a mutual snap connection or snap connection; the physical connection may also be an integral connection, such as welding, bonding or integral molding to form a connection for connection. The "connection" or "connection" of a circuit structure may refer to an electrical connection or a signal connection in addition to a physical connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected, or it may be the internal connection of two elements; the signal connection may refer to a signal connection through a media medium, such as a radio wave, in addition to a signal connection through a circuit. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] like Figure 1 , Figure 2 and Figure 6As shown, an embodiment of the first aspect of the present application provides a resistor connection assembly 100, which is connected between a contactor 200 and a pre-charged contact 300, and the resistor connection assembly 100 includes: a resistor wire 3 and a first connecting plate 1; the first connecting plate 1 is connected to the pre-charged contact 300, and a first boss 11 is provided on the first connecting plate 1; the resistor wire 3 is a bendable metal wire, and the first end 31 of the resistor wire 3 is bent into a ring shape, and the ring-shaped resistor wire 33 is sleeved on the first boss 11, so that the first end 31 of the resistor wire 3 is electrically connected to the first connecting plate 1; the end of the first connecting plate 1 connected to the first end 31 is a first wiring terminal, and a first wire accommodating groove 12 is provided between the first boss 11 and the first wiring terminal, and the resistor wire 3 is welded and fixed in the first wire accommodating groove 12.

[0049] The resistor connection assembly 100 provided by the embodiment of the first aspect of the present application includes: a resistor wire 3 and a first connection plate 1; the resistor wire 3 is a bendable metal wire, so that the resistor wire 3 can be bent, and common materials of the resistor wire 3 include copper, nickel-chromium alloy (such as nylon wire), stainless steel, etc. The first end 31 of the resistor wire 3 is bent into a ring shape, and the ring-shaped resistor wire 33 is sleeved on the first boss 11 to prevent the resistor wire 3 from falling off the first boss 11. Since the first boss 11 is set on the first connection plate 1, and the first connection plate 1 is connected to the pre-filled contact 300, the first fixed connection between the resistor wire 3 and the pre-filled contact 300 is achieved.

[0050] In order to make the connection between the resistance wire 3 and the pre-filled contact 300 more reliable, a first wire-accommodating groove 12 is opened between the first boss 11 and the first terminal. The first terminal is one end of the first connecting plate 1 connected to the first end 31 of the resistance wire 3. The resistance wire 3 is welded and fixed in the first wire-accommodating groove 12, thereby realizing a second fixed connection between the resistance wire 3 and the pre-filled contact 300, further improving the reliability of the connection between the resistance wire 3 and the pre-filled contact 300, so as to solve the problem in the related art that the pre-filled contact 300 cannot suppress the surge current due to poor contact between the resistance wire 3 and the pre-filled contact 300, thereby realizing a reliable connection between the resistance wire 3 and the pre-filled contact 300.

[0051] In addition, since the resistance wire 3 is always sleeved on the first boss 11 on the first connecting plate 1, even if the welding point where the resistance wire 3 is welded and fixed in the first wire-containing groove 12 is loose or the welding point is poorly welded, it will not affect the connection between the resistance wire 3 and the pre-charge contact 300.

[0052] Specifically, the resistance wire 3 can be bent into a ring-shaped resistance wire 33 of any size, so the resistance wire 3 can be bent into a size that matches the first boss 11, so that the resistance wire 3 is more firmly mounted on the first boss 11, thereby further improving the stability of the first fixed connection between the resistance wire 3 and the pre-charge contact 300.

[0053] Further, in the related art, the resistance wire 3 is connected between the contactor 200 and the pre-filled contact 300 through a wiring piece, the resistance wire 3 is riveted on the wiring piece, and the wiring piece is connected to the first connecting plate 1 of the pre-filled contact 300 through a wiring screw. Since the connecting plate needs to be screwed to the wiring piece, a threaded flange hole for fixing the screw is provided on the first connecting plate 1. In the embodiment of the present application, the first end 31 of the resistance wire 3 can be sleeved on the untapped threaded flange hole, so that the threaded flange hole replaces the boss to realize the first fixed connection between the resistance wire 3 and the pre-filled contact 300, so as to achieve the purpose of reducing the processing steps, thereby reducing the production cost.

[0054] In some embodiments, Figure 2 and Figure 3 As shown, the resistor connection assembly 100 also includes a second connecting plate 2; the second connecting plate 2 is connected to the contactor 200, and a second boss 21 is provided on the second connecting plate 2; the second end 32 of the resistor wire 3 is bent into a ring shape, and the ring-shaped resistor wire 33 is sleeved on the second boss 21, so that the second end 32 of the resistor wire 3 is electrically connected to the second connecting plate 2; the end of the second connecting plate 2 connected to the second end 32 is a second wiring terminal, and a second wire accommodating groove 22 is provided between the second boss 21 and the second wiring terminal, and the resistor wire 3 is welded and fixed in the second wire accommodating groove 22.

[0055] The first end 31 of the resistance wire 3 is connected to the pre-charge contact 300, and the second end 32 of the resistance wire 3 is connected to the contactor 200. It can be seen that the pre-charge contact 300 and the contactor 200 are electrically connected through the resistance wire 3. In order for the pre-charge contact 300 to achieve a good surge current suppression effect, the electrical connection between the pre-charge contact 300 and the contactor 200 must be stable and reliable. Therefore, in addition to ensuring a reliable connection between the resistance wire 3 and the pre-charge contact 300, a reliable connection between the resistance wire 3 and the contactor 200 must also be ensured.

[0056] According to the embodiment, a second connecting plate 2 is provided on the contactor 200, a second boss 21 is provided on the second connecting plate 2, and the second end 32 of the bendable resistance wire 3 is bent into a ring shape, and the ring-shaped resistance wire 33 is sleeved on the second boss 21 to prevent the resistance wire 3 from falling off the second boss 21. Since the second boss 21 is provided on the second connecting plate 2 and the second connecting plate 2 is connected to the contactor 200, the first fixed connection between the resistance wire 3 and the contactor 200 is achieved.

[0057] In order to make the connection between the resistance wire 3 and the contactor 200 more reliable, a second wire-accommodating groove 22 is provided between the second boss 21 and the second terminal. The second terminal is one end of the second connecting plate 2 connected to the second end 32 of the resistance wire 3. The resistance wire 3 is welded and fixed in the second wire-accommodating groove 22, realizing the second fixed connection between the resistance wire 3 and the contactor 200, further improving the reliability of the connection between the resistance wire 3 and the contactor 200. While realizing the reliable connection between the resistance wire 3 and the pre-charge contact 300, the reliability of the connection between the resistance wire 3 and the contactor 200 is also improved, so that the connection between the pre-charge contact 300 and the contactor 200 is more stable and reliable.

[0058] In addition, since the resistance wire 3 is always sleeved on the second boss 21 on the second connecting plate 2, even if the welding point where the resistance wire 3 is welded and fixed in the second wire-containing groove 22 is loose or the welding point is poorly welded, it will not affect the connection between the resistance wire 3 and the contactor 200.

[0059] Specifically, the resistance wire 3 can be bent into a ring-shaped resistance wire 33 of any size, so the resistance wire 3 can be bent into a size that matches the second boss 21, so that the resistance wire 3 is more firmly mounted on the second boss 21, thereby further improving the stability of the first fixed connection between the resistance wire 3 and the contactor 200.

[0060] It should be noted that there may be other connection modes between the contactor 200 and the resistance wire 3. For example, Figure 4 As shown, a U-shaped socket is provided in the contactor 200, and the contactor 200 can also be connected to the resistance wire 3 through a U-shaped wiring piece 4. A heat shrink tube 41 is wrapped between the resistance wire 3 and the U-shaped wiring piece 4. The heat shrink tube 41 shrinks when heated and is used to press the U-shaped pressing piece between the resistance wires 3. The U-shaped wiring piece 4 is inserted into the U-shaped socket to achieve a fixed connection between the contactor 200 and the resistance wire 3.

[0061] Those skilled in the art can select the connection method between the contactor 200 and the resistance wire 3 as needed.

[0062] In some embodiments, Figure 1 , Figure 3 and Figure 5 As shown, a first clamping groove 111 is provided on the outer side of the first boss 11, and the first clamping groove 111 surrounds the first boss 11; the first end 31 is sleeved and clamped in the first clamping groove 111 to prevent the resistance wire 3 from falling off the first boss 11; a second clamping groove 211 is provided on the outer side of the second boss 21, and the second clamping groove 211 surrounds the second boss 21; the second end 32 is sleeved and clamped in the second clamping groove 211 to prevent the resistance wire 3 from falling off the second boss 21.

[0063] According to this embodiment, a first card slot is arranged around the outside of the first boss 11, so that when the first end 31 of the resistance wire 3 is sleeved on the first boss 11, it can be snap-fitted and fixed in the first card slot, making the first fixed connection between the resistance wire 3 and the pre-charge contact 300 more stable.

[0064] Similarly, a second slot is arranged around the outer side of the second boss 21, so that when the second end 32 of the resistor wire 3 is sleeved on the second boss 21, it can be snap-fitted and fixed in the second slot, making the first fixed connection between the resistor wire 3 and the contactor 200 more stable.

[0065] By strengthening the first fixed connection between the resistance wire 3 and the pre-charge contactor, and the first fixed connection between the resistance wire 3 and the contactor 200, the electrical connection between the pre-charge contact 300 and the contactor 200 is more stable and reliable, so that the pre-charge contact 300 can achieve a good effect of suppressing surge current.

[0066] In some embodiments, Figure 5 As shown, the first clamping groove 111 is disposed at the bottom of the first boss 11 ; the second clamping groove 211 is disposed at the bottom of the second boss 21 .

[0067] According to the embodiment, after the first end 31 of the resistance wire 3 is sleeved on the first clamping groove 111, it needs to extend into the first wire accommodating groove 12. In the height direction of the first boss 11, the distance between the bottom of the first boss 11 and the first wire accommodating groove 12 is closer. When the resistance wire 3 extends from the first clamping groove 111 set at the bottom of the first boss 11 to the first wire accommodating groove 12, the amount of the resistance wire 3 extending into the first clamping groove can be saved.

[0068] Similarly, after the second end 32 of the resistor wire 3 is sleeved on the second clamping groove 211, it needs to extend into the second wire-accommodating groove 22. In the height direction of the second boss 21, the distance between the bottom of the second boss 21 and the second wire-accommodating groove 22 is closer. When the resistor wire 3 extends from the second clamping groove 211 set at the bottom of the second boss 21 to the second wire-accommodating groove 22, the amount of the resistor wire 3 extending into the second clamping groove can be saved, thereby achieving the purpose of reducing production costs.

[0069] Further, in the height direction of the first boss 11 , when the first clamping groove 111 is too far away from the first wire accommodating groove 12 , the first end 31 of the resistor wire 3 is stretched in the air when extending into the first wire accommodating groove 12 .

[0070] Similarly, in the height direction of the second boss 21, when the second card slot is too far from the second wire-accommodating slot 22, the second end 32 of the resistor wire 3 is stretched in the air when extending into the second wire-accommodating slot 22. The part of the resistor wire 3 stretched in the air is easily damaged or broken, resulting in disconnection between the pre-filled contact 300 and the contactor 200, and the pre-filled contact 300 cannot suppress the surge current of the contactor 200, which may burn out the contactor 200. Therefore, it is necessary to set the first card slot at the bottom of the first boss 11 and the second card slot at the bottom of the second boss 21 to prevent the above situation from happening.

[0071] In some embodiments, Figure 2 and Figure 5 As shown, along the opening direction of the first wire-accommodating groove 12, the height between the bottom surface of the first wire-accommodating groove 12 and the top surface of the first connecting plate 1 gradually increases; at the end close to the first boss 11, the bottom surface of the first wire-accommodating groove 12 and the top surface of the first connecting plate 1 are at a first distance; at the end close to the first wiring terminal, the bottom surface of the first wire-accommodating groove 12 and the top surface of the first connecting plate 1 are at a second distance; the second distance is greater than the first distance; along the opening direction of the second wire-accommodating groove 22, the height between the bottom surface of the second wire-accommodating groove 22 and the top surface of the second connecting plate 2 gradually increases; at the end close to the second boss 21, the bottom surface of the second wire-accommodating groove 22 and the top surface of the second connecting plate 2 are at a third distance; at the end close to the second wiring terminal, the bottom surface of the second wire-accommodating groove 22 and the top surface of the second connecting plate 2 are at a fourth distance; the fourth distance is greater than the third distance.

[0072] According to the embodiment, the second distance is the distance between the bottom surface of the first wire-accommodating groove 12 and the top surface of the first connecting plate 1 at one end of the first wire-accommodating groove 12 close to the first terminal; the first distance is the distance between the bottom surface of the first wire-accommodating groove 12 and the top surface of the first connecting plate 1 at one end of the first wire-accommodating groove 12 close to the first boss 11; when the second distance is greater than the first distance, it means that the depth of the first wire-accommodating groove 12 gradually deepens from the first boss 11 to the first terminal, and the resistance wire 3 is welded in the deeper area of ​​the first wire-accommodating groove 12, so that the top of the resistance wire 3 is completely immersed in the first wire-accommodating groove 12, so as to prevent the resistance wire 3 from being broken by the welding electrode during welding, so that the second fixed connection between the resistance wire 3 and the pre-charged contact 300 is more stable.

[0073] Similarly, the fourth distance is the distance between the bottom surface of the second wire-accommodating groove 22 and the top surface of the second connecting plate 2 at one end of the second wire-accommodating groove 22 close to the second terminal; the third distance is the distance between the bottom surface of the second wire-accommodating groove 22 and the top surface of the second connecting plate 2 at one end of the second wire-accommodating groove 22 close to the second boss 21; when the fourth distance is greater than the third distance, it means that the depth of the second wire-accommodating groove 22 gradually deepens from the second boss 21 to the second terminal, and the resistance wire 3 is welded in the deeper area of ​​the second wire-accommodating groove 22, so that the top of the resistance wire 3 is completely immersed in the second wire-accommodating groove 22, so as to prevent the resistance wire 3 from being broken by the welding electrode during welding, so that the second fixed connection between the resistance wire 3 and the contactor 200 is more stable.

[0074] In some embodiments, Figure 2 and Figure 5 As shown, the first wire accommodating groove 12 includes a first side wall 121 and a second side wall 122 arranged opposite to each other, and the first side wall 121 and the second side wall 122 are two inclined surfaces intersecting at the bottom of the first wire accommodating groove 12; the second wire accommodating groove 22 includes a third side wall 221 and a fourth side wall 222 arranged opposite to each other, and the third side wall 221 and the fourth side wall 222 are two inclined surfaces intersecting at the bottom of the second wire accommodating groove 22.

[0075] According to this embodiment, the first side wall 121 and the second side wall 122 are two inclined surfaces intersecting at the bottom of the first wire-accommodating groove 12, which provide a guide for the process of pressing the resistance wire 3 into the first wire-accommodating groove 12. Since the first side wall 121 and the second side wall 122 intersect at the bottom of the first wire-accommodating groove 12, the distance between the first side wall 121 and the second side wall 122 is minimized at the bottom of the first wire-accommodating groove 12, so that the welding point between the resistance wire 3 and the first wire-accommodating groove 12 is minimized, thereby achieving precise welding of the resistance wire 3 and improving the reliability of the connection between the resistance wire 3 and the pre-charged contact 300.

[0076] Similarly, the third side wall 221 and the fourth side wall 222 are two inclined surfaces intersecting at the bottom of the second wire accommodating groove 22, providing a guide for the process of pressing the resistance wire 3 into the second wire accommodating groove 22. Since the third side wall 221 and the fourth side wall 222 intersect at the bottom of the second wire accommodating groove 22, the distance between the third side wall 221 and the fourth side wall 222 is minimized at the bottom of the second wire accommodating groove 22, so that the welding point between the resistance wire 3 and the second wire accommodating groove 22 is minimized, thereby achieving precise welding of the resistance wire 3 and improving the reliability of the connection between the resistance wire 3 and the contactor 200.

[0077] In some embodiments, Figure 2 and Figure 5As shown, the minimum distance between the bottom of the first side wall 121 and the bottom of the second side wall 122 is the diameter of the resistance wire 3 ; the minimum distance between the bottom of the third side wall 221 and the bottom of the fourth side wall 222 is the diameter of the resistance wire 3 .

[0078] By setting the minimum distance between the bottom of the first side wall 121 and the bottom of the second side wall 122 to the diameter of the resistance wire 3, it can be ensured that the resistance wire 3 can contact the bottom of the first wire-accommodating groove 12, so that the contact area between the resistance wire 3 and the first wire-accommodating groove 12 is maximized, thereby making the connection between the resistance wire 3 and the pre-charge contact 300 more stable.

[0079] Similarly, the minimum distance between the bottom of the third side wall 221 and the bottom of the fourth side wall 222 is set to the diameter of the resistance wire 3, which can ensure that the resistance wire 3 can contact the bottom of the second wire-accommodating groove 22, so that the contact area between the resistance wire 3 and the second wire-accommodating groove 22 is maximized, thereby making the connection between the resistance wire 3 and the contactor 200 more stable.

[0080] like Figure 6 As shown, an embodiment of the second aspect of the present application provides a contactor 200, comprising: the resistance connection component 100, the contactor body 200 and the pre-filled contact 300 of any one of the above embodiments; the contactor body 200 is connected to the first connecting plate 1 of the resistance connection component 100; the pre-filled contact 300 is connected to the second connecting plate 2 of the resistance connection component 100; or; the contactor body 200 is connected to the second connecting plate 2 of the resistance connection component 100; the pre-filled contact 300 is connected to the first connecting plate 1 of the resistance connection component 100.

[0081] In some embodiments, Figure 6 As shown, the contactor 200 includes two resistance connection components 100, which are used to connect the pre-filled contact 300 in parallel to the contactor body 200; a resistance connection component 100 is connected between the current inlet of the contactor body 200 and the current outlet of the pre-filled contact 300; another resistance connection component 100 is connected between the current outlet of the contactor body 200 and the current inlet of the pre-filled contact 300.

[0082] According to the embodiment, a resistor connection component 100 is connected between the current inlet of the contactor body 200 and the current outlet of the pre-filling contact 300, and another resistor connection component 100 is connected between the current outlet of the contactor body 200 and the current inlet of the pre-filling contact 300, so that the pre-filling contact 300 is connected in parallel to the contactor body 200, so that the surge current flows through the resistor wire 3 and the pre-filling contact 300, and does not flow through the contactor body 200, thereby achieving the purpose of the pre-filling contact 300 protecting the contactor 200 from being burned by the surge current.

[0083] In some embodiments, Figure 6 As shown, the contactor includes three main contacts, each of which includes a current inlet and a current outlet. Therefore, six resistance connection components 100 are required to connect the pre-filling contact 300 in parallel to the contactor body 200 so that the surge current in each main contact of the contactor body 200 can flow into the pre-filling contact 300.

[0084] The beneficial effects provided in the above-mentioned second aspect and various possible designs of the above-mentioned second aspect can refer to the beneficial effects brought about by the above-mentioned first aspect and various possible implementation methods of the first aspect, and will not be repeated here.

[0085] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0086] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A resistance connection assembly connected between a contactor and a pre-charged contact, characterized in that: include: a resistance wire and a first connecting plate; The first connecting plate is connected to the pre-filled contact, and a first boss is provided on the first connecting plate; The resistance wire is a bendable metal wire, the first end of the resistance wire is bent into a ring shape, the ring-shaped resistance wire is sleeved on the first boss, so that the first end of the resistance wire is electrically connected to the first connecting plate; One end of the first connecting plate connected to the first end is a first wiring terminal, a first wire accommodating groove is provided between the first boss and the first wiring terminal, and the resistance wire is welded and fixed in the first wire accommodating groove.

2. The resistor connection assembly according to claim 1, characterized in that: Also includes a second connecting plate; The second connecting plate is connected to the contactor, and a second boss is provided on the second connecting plate; The second end of the resistance wire is bent into a ring shape, and the ring-shaped resistance wire is sleeved on the second boss, so that the second end of the resistance wire is electrically connected to the second connecting plate; One end of the second connecting plate connected to the second end is a second wiring terminal, a second wire accommodating groove is provided between the second boss and the second wiring terminal, and the resistance wire is welded and fixed in the second wire accommodating groove.

3. The resistor connection assembly according to claim 2, characterized in that: A first clamping groove is formed on the outer side of the first boss, and the first clamping groove surrounds the first boss; The first end is sleeved and clamped in the first clamping groove to prevent the resistance wire from falling off the first boss; A second clamping groove is formed on the outer side of the second boss, and the second clamping groove surrounds the second boss; The second end is sleeved and clamped in the second clamping groove to prevent the resistance wire from falling off the second boss.

4. The resistor connection assembly according to claim 3, characterized in that: The first clamping groove is arranged at the bottom of the first boss; The second clamping groove is arranged at the bottom of the second boss.

5. The resistor connection assembly according to any one of claims 2 to 4, characterized in that: Along the opening direction of the first wire accommodating groove, the height between the bottom surface of the first wire accommodating groove and the top surface of the first connecting plate gradually increases; At one end close to the first boss, a first distance is defined between the bottom surface of the first wire accommodating groove and the top surface of the first connecting plate; At one end close to the first wiring terminal, a second distance is provided between the bottom surface of the first wire accommodating groove and the top surface of the first connecting plate; The second distance is greater than the first distance; Along the opening direction of the second wire accommodating groove, the height between the bottom surface of the second wire accommodating groove and the top surface of the second connecting plate gradually increases; At one end close to the second boss, a third distance is between the bottom surface of the second wire accommodating groove and the top surface of the second connecting plate; At one end close to the second wiring terminal, a fourth distance is defined between the bottom surface of the second wire accommodating groove and the top surface of the second connecting plate; The fourth distance is greater than the third distance.

6. The resistor connection assembly according to any one of claims 2 to 4, characterized in that: The first wire accommodating groove comprises a first side wall and a second side wall which are arranged opposite to each other, and the first side wall and the second side wall are two inclined surfaces which intersect at the bottom of the first wire accommodating groove; The second wire accommodating groove comprises a third side wall and a fourth side wall which are arranged opposite to each other, and the third side wall and the fourth side wall are two inclined surfaces which intersect at the bottom of the second wire accommodating groove.

7. The resistor connection assembly according to claim 6, characterized in that: The minimum value of the distance between the bottom of the first side wall and the bottom of the second side wall is the diameter of the resistance wire; The minimum value of the distance between the bottom of the third side wall and the bottom of the fourth side wall is the diameter of the resistance wire.

8. A contactor, characterized in that: It comprises a resistance connection assembly, a contactor body and a pre-charged contact according to any one of claims 1 to 7; The contactor body is connected to the first connecting plate of the resistance connecting assembly; The pre-filled contact is connected to the second connecting plate of the resistance connecting assembly; or; The contactor body is connected to the second connecting plate of the resistance connecting assembly; The pre-filling contact is connected to the first connecting plate of the resistance connecting assembly.

9. The contactor according to claim 8, characterized in that: It comprises two said resistance connection components, which are used to connect said pre-charged contacts in parallel to said contactor body; A resistor connection assembly is connected between the current inlet of the contactor body and the current outlet of the pre-charge contact; Another resistor connection component is connected between the current outlet of the contactor body and the current inlet of the pre-charge contact.

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