CN218385035U - Contact bridge assembly and direct current relay - Google Patents

Abstract

The application provides a contact bridge assembly and a direct current relay, wherein the contact bridge assembly comprises a driving mechanism and a transmission mechanism, and the transmission mechanism is used for moving along a preset direction under the driving of the driving mechanism; the two opposite ends of the elastic element in the preset direction are respectively connected with the transmission mechanism and the moving contact; the sliding piece is arranged on one side of the moving contact, which deviates from the elastic piece in the preset direction, and is connected with the moving contact; wherein, drive mechanism has the pterygoid lamina that extends towards the gleitbretter, the gleitbretter with pterygoid lamina is connected. The application aims to solve the technical problem that the assembly difficulty of the contact bridge assembly in the prior art is high.

Description

Contact Bridge Assemblies and DC Relays

technical field

The application relates to the technical field of relays, in particular to a contact bridge assembly and a DC relay.

Background technique

DC relays include moving contacts and static contacts. The moving contact is separated or contacted with the static contact under the drive of the transmission mechanism, so as to achieve the purpose of automatic switching and safety protection of the circuit. In the prior art, the transmission mechanism includes a transmission rod on which a U-shaped basket is arranged. The U-shaped basket supports the movable contact together with the elastic member. Due to the need to install elastic parts and moving contacts in the U-shaped basket; during assembly, due to the interference of the supporting section of the U-shaped basket, when the elastic parts are loaded into the U-shaped basket and then the moving contacts are installed, the moving contacts will not The elastic part needs to be loaded into the U-shaped basket only after being extremely compressed, which is a technical problem that is difficult to assemble.

Utility model content

The present application provides a contact bridge assembly, aiming at solving the technical problem that the contact bridge assembly is difficult to assemble in the prior art.

The application proposes a contact bridge assembly, comprising:

Drive mechanism,

a transmission mechanism, used to move in a preset direction driven by the driving mechanism;

an elastic member and a moving contact, the opposite ends of the elastic member in the predetermined direction are respectively connected to the transmission mechanism and the moving contact; and

a sliding piece, the sliding piece is arranged on the side of the moving contact away from the elastic member in the preset direction, and is connected with the moving contact;

Wherein, the transmission mechanism has a wing plate extending toward the sliding piece, and the sliding piece is connected to the wing plate.

Optionally, the sliding sheet has a bent section formed by bending toward the elastic member, and the bent section has a first side and a second side opposite to each other, wherein the first side and the first side are opposite to each other. The wing plate is in contact, and the second side is in contact with the movable contact.

Optionally, the number of the bending sections is at least two, and at least two of the bending sections are provided on opposite sides of the slider in the width direction of the movable contact, and the two The distance of the bent section in the width direction of the movable contact is larger than the width of the movable contact.

Optionally, the wing plate is provided with a first limiting hole; the sliding piece has a first limiting column extending toward the wing plate, and the first limiting column is embedded in the first limiting column. In the hole, and the first limiting post can move along the preset direction in the first limiting hole.

Optionally, the sliding piece is welded and/or riveted to the moving contact.

Optionally, the transmission mechanism includes: a transmission rod, the transmission rod is power-connected to the drive mechanism; an insulating seat, the insulating seat is connected to the transmission rod, and the elastic member is far away from the sliding plate One end of one end is connected with the insulating base body; and a bracket, the bracket is connected with the insulating base body, and has the wing plate formed extending toward the sliding piece in the preset direction.

Optionally, the transmission rod, the insulating base and the bracket are integrally formed.

Optionally, the bracket further includes a bottom plate, the number of the wing plates is two, and the two wing plates extend from opposite sides of the bottom plate toward the moving contact, and the bottom plate and the two wing plates extend toward the moving contact. The wing plate defines an installation space; the insulating seat body includes a first insulating seat and a second insulating seat; the first insulating seat is formed with a sinking groove for installation, the bottom plate is embedded in the sinking groove for installation, and the first insulating seat Two insulating bases are installed in the installation space.

Optionally, the transmission mechanism further includes a first positioning piece and a second positioning piece, the first positioning piece and the second positioning piece are arranged at intervals in the preset direction, and are connected to the transmission rod respectively. Fixedly connected; the first insulating seat has a first positioning surface away from the sliding piece, the second insulating seat has a second positioning surface facing the sliding piece; the first insulating seat has a first installation through hole, the second insulating seat has a second installation through hole communicating with the first installation through hole; at least part of the transmission rod is provided in the first installation through hole and the second installation through hole , and the first positioning member is in contact with the first positioning surface, and the second positioning member is in contact with the second positioning surface.

Optionally, a boss is configured on the side of the second insulating base body facing the sliding piece, and the boss is configured with a first accommodation hole communicating with the second installation through hole, and the first accommodation The diameter of the hole is larger than that of the second installation through hole to define the second positioning surface, and the second positioning member is arranged in the receiving hole.

Optionally, the elastic member is sleeved on the outside of the boss.

Optionally, a counterbore communicated with the first installation through hole is configured on the side of the first insulating base body facing away from the sliding piece, and the diameter of the counterbore is larger than that of the first installation through hole. The aperture is used to define the first positioning surface, and the first positioning member is arranged in the counterbore.

Optionally, the installation sinker has a bottom groove wall facing the sliding piece, and the first insulating seat has a bottom groove wall arranged on the bottom groove wall and facing the moving contact in the preset direction. An extended second limit post; a second limit hole is provided on the second insulating seat; the bottom plate has an escape hole, and the second limit post passes through the escape hole and is embedded in the second limit inside the hole.

Optionally, the embodiment of the present application also proposes a DC relay, including:

static contacts; and

The contact bridge assembly as mentioned above, wherein, the moving contact and the fixed contact are arranged at intervals in the predetermined direction of the transmission mechanism, and the moving contact and the fixed contact have contact with each other The contact state and the separation state separated from each other.

In the technical solution of the present application, the sliding piece is first connected with the moving contact to form an independent part, and then the sliding piece can support the moving contact; the opposite ends of the elastic member are respectively connected with the transmission structure and the moving contact, and the transmission The mechanism has a wing plate extending toward the sliding piece; during assembly, the elastic member can be installed on the transmission mechanism first, and then the sliding piece is connected to the wing plate on the transmission mechanism; therefore, compared with the prior art, During assembly, the elastic member will not be interfered by the sliding piece, and the moving contact and the sliding piece form independent components, so the moving contact will not be interfered by the sliding piece when assembling the moving contact, thereby reducing the difficulty of assembling the contact bridge.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the accompanying drawings that need to be used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present utility model , for those skilled in the art, other drawings can also be obtained according to these drawings on the premise of not paying creative work.

FIG. 1 is a schematic cross-sectional view of a structure of a DC relay provided in an embodiment of the present application;

Fig. 2 is an exploded schematic diagram of a structure of a contact bridge assembly applied to a DC relay provided in an embodiment of the present application;

Fig. 3 is an exploded schematic diagram of another structure of the contact bridge assembly applied to the DC relay provided by the embodiment of the present application;

4 is a schematic diagram of a partial section of another structure of the contact bridge assembly applied to the DC relay provided by the embodiment of the present application;

Fig. 5 is a cross-sectional view of the first insulating seat of the contact bridge assembly provided in the embodiment of the present application;

Fig. 6 is a cross-sectional view of the second insulating seat of the contact bridge assembly provided in the embodiment of the present application;

FIG. 7 is a schematic perspective view of the three-dimensional structure of the contact bridge assembly provided in the embodiment of the present application;

Fig. 8 is an exploded schematic diagram of the DC relay provided in the embodiment of the present application.

List of reference signs

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without making creative efforts belong to the protection scope of the present utility model.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", The orientation or positional relationship indicated by "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on those shown in the drawings Orientation or positional relationship is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation on the utility model. limit. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of said features. In the description of the present utility model, "plurality" means two or more, unless otherwise specifically defined.

In this application, the word "exemplary" is used to mean "serving as an example, illustration or illustration". Any embodiment described in this application as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. In order to enable anyone skilled in the art to realize and use the utility model, the following description is given. In the following description, details are set forth for purposes of explanation. It should be understood that one of ordinary skill in the art would recognize that the present invention may be practiced without the use of these specific details. In other instances, well-known structures and processes are not described in detail so as not to obscure the description of the present invention with unnecessary detail. Therefore, the present invention is not intended to be limited to the embodiments shown, but is to be accorded the widest scope consistent with the principles and features disclosed in the application.

In the prior art, the contact bridge assembly includes a moving contact, an elastic member and a transmission mechanism. The drive mechanism preferably includes a U-shaped basket. The U-shaped basket includes a support section and a connecting section for connecting to other structures of the transmission mechanism. The supporting section is perpendicular to the connecting section, defining a U-shaped installation space. The elastic piece is embedded in the space to press the moving contact against the supporting section. During installation, due to the interference effect of the support section, the elastic member usually needs to be extremely compressed before it can be loaded into the movable contact, which makes it very difficult to assemble the elastic member and the movable contact.

The application proposes a contact bridge assembly and a DC relay containing the contact bridge assembly. As shown in FIG. 1 , the DC relay 10 includes a contact bridge assembly 100 , a moving contact 120 and a housing 300 . Further, as shown in FIG. 1 and FIG. 2 , the contact bridge assembly 100 includes:

drive mechanism 150,

a transmission mechanism 110, the driving mechanism 150 is used to drive the transmission mechanism 110 to move in a preset direction;

An elastic member 130 and a moving contact 120, the opposite ends of the elastic member 130 in the preset direction are respectively connected to the transmission mechanism 110 and the moving contact 120; and

a sliding piece 140, the sliding piece 140 is arranged on the side of the moving contact 120 away from the elastic member 130 in the predetermined direction, and is connected with the moving contact 120;

Wherein, the transmission mechanism 110 has a wing plate 1131 extending toward the sliding piece 140 , and the sliding piece 140 is connected to the wing plate 1131 .

In the technical solution of the embodiment of the present application, the sliding piece 140 is first connected with the moving contact 120 to form an independent part, and then the sliding piece 140 can support the moving contact 120; the opposite ends of the elastic member 130 are respectively connected to the transmission structure and The moving contact 120 is connected, and the transmission mechanism 110 has a wing plate 1131 extending toward the sliding piece 140; during assembly, the elastic member 130 can be loaded into the transmission mechanism 110 first, and then the sliding piece 140 is connected to the sliding piece 110 on the transmission mechanism 110. Wings 1131 are connected; therefore, compared with the prior art, the elastic member 130 will not be interfered by the assembly of the sliding piece 140 during assembly, and the moving contact 120 and the sliding piece 140 form independent parts, so when assembling the moving The contact 120 will not be interfered by the sliding sheet 140, so that the assembly difficulty of the contact bridge is reduced.

The working principle of the contact bridge assembly 100 proposed in the embodiment of the present application is that the driving mechanism 150 drives the transmission mechanism 110 to move in a preset direction. Since the two ends of the elastic member 130 abut against the transmission mechanism 110 and the moving contact 120 respectively. The sliding piece 140 is connected to the wing plate 1131 , the moving contact 120 is connected to the sliding piece 140 , and then the transmission mechanism 110 drives the moving contact 120 to move in a preset direction to contact or separate from the static contact 200 . The predetermined direction includes a direction close to the fixed contact 200 and a direction away from the fixed contact 200 . Usually, the preset direction is a straight line direction, that is, the movable contact 120 moves along a preset straight line. In the embodiment, the preset direction is related to the installation orientation of the DC relay 10, so the preset direction can be any linear direction; for example, the preset direction can be parallel to the direction of gravity, or parallel to the horizontal direction, or have a certain angle angle.

In an embodiment, the elastic member 130 may be a first spring.

As an optional implementation of the above embodiment, as shown in FIG. 2 , the sliding piece 140 has a bent section 141 bent toward the elastic member 130 . The bent section 141 has a first side and a second side opposite to each other. Wherein, the first side is in contact with the wing plate 1131 , and the second side is in contact with the moving contact 120 . In the prior art, since the moving contact bridge is made of relatively soft pure copper, raw copper powder is unavoidably picked up during the friction process with the relatively harder wing plate 1131, affecting the gap between the moving contact 120 and the static contact 200. s contact. In this embodiment, the sliding piece 140 is provided with a bent section 141 formed by bending toward the elastic member 130, and the opposite sides of the bent section 141 are respectively in contact with the wing plate 1131 and the movable contact 120, avoiding the movement of the movable contact. The direct friction between the head 120 and the wing plate 1131 avoids the abrasion of the movable contact 120, and at the same time, the amount of metal powder generated between the wing plate 1131 and the sliding piece 140 is reduced, so that the safety hazard of the metal powder falling between the contacts is greatly reduced. improve.

As an optional implementation of the above-mentioned embodiment, the number of the bending sections 141 is at least two, and at least two of the bending sections are provided on the sliding piece 140 in the width direction of the movable contact 120 On opposite sides, the distance between at least two bent sections 141 in the width direction of the movable contact 120 is greater than the width of the movable contact 120 . For example, in the embodiment, the number of bent sections is two. The sliding piece 140 is defined by two bent sections 141 as an installation area for installing the moving contact 120 . The opposite sides in the width direction of the moving contact 120 are respectively in contact with the corresponding bent sections 141 , avoiding direct contact between the moving contact 120 and the wing plate 1131 .

In some embodiments, the bent section 141 is symmetrically arranged on both sides of the sliding piece 140 .

As an optional implementation of the above-mentioned embodiment, as shown in FIG. 2 and FIG. 3 , the wing plate 1131 is provided with a first limiting hole 1131a; A limit post 142 . As shown in FIG. 7, the first limiting post 142 is embedded in the first limiting hole 1131a, and the first limiting post 142 can move along the preset direction in the first limiting hole 1131a . The size of the first limiting hole 1131a in the preset direction is larger than the size of the first limiting post 142 in the preset direction, so that the first limiting post 142 can float along the preset direction in the first limiting hole 1131a. The matching size of the first limiting hole 1131a and the first limiting post 142 can effectively determine the moving amount of the movable contact 120 in the preset direction, that is, it can be adjusted by adjusting the position and size of the first limiting hole 1131a The opening distance between the moving contact 120 and the static contact 200 and the moving contact tracking stroke greatly improve the applicability of the product and structure, and this small-scale sliding displacement also improves the movement of the moving contact 120. The wiping stroke to reduce the risk of fusion welding during work.

When the drive mechanism 150 drives the transmission mechanism 110 to move close to the static contact 200 in a preset direction, the elastic member 130 presses the movable contact 120 to move upward until it is in full contact with the static contact 200 . The width L of the section 141 is greater than the width W of the moving contact 120 , the wing plate 1131 slides against the bent section 141 , the first limiting column 142 floats downward relative to the first limiting hole 1131 a , and the elastic member 130 is in a continuous compression state.

When the driving mechanism 150 drives the transmission mechanism 110 to move away from the fixed contact 200 in a predetermined direction, the relative distance between the upper edge of the first limiting column 142 and the upper edge of the first limiting hole 1131a gradually decreases until they are fully contacted, and the elastic member 130 In the state of continuous dilation, the movable contact 120 and the static contact 200 begin to separate, the upper edge of the first limiting hole 1131a and the first limiting column 142 set on the sliding plate 140 are in a gradually limiting state, and the elastic member 130 Drive the moving contact 120 to continue to separate until the driving mechanism 150 stops running.

Generally, in order to maintain the stability of the movement of the sliding piece 140 , as shown in FIG. 2 , the sliding piece 140 is provided with first limiting columns 142 on both sides in the width direction of the moving contact 120 . And there are at least two limiting columns on each side, and they are arranged symmetrically. For example, there are two positions on each side, and they are arranged symmetrically on both sides of the bending section 141 . Correspondingly, a first limiting hole 1131a is correspondingly provided on the wing plate 1131 .

As an optional implementation of the above embodiment, the sliding piece 140 is welded and/or riveted to the movable contact 120 . The sliding piece 140 and the movable contact 120 are fixed as one by welding and/or riveting, so that the two do not have relative movement. In some embodiments, the two ends of the sliding piece 140 are provided with riveting holes, which cooperate with the rivets provided on the movable contact bridge away from the elastic member 130 to be firmly riveted. In some embodiments, the sliding piece 140 and the movable contact 120 can also be welded together. The sliding piece 140 can be made of hard metal like SPCC, Q195, etc., which can improve the mechanical strength of the moving contact bridge, and avoid the hidden danger of the moving contact 120 not moving properly due to the deformation of the moving contact 120 under high temperature.

As an optional implementation of the above embodiment, as shown in Fig. 1, Fig. 2 and Fig. 3, the transmission mechanism 110 includes: a transmission rod 111, which is power-connected with the drive mechanism 150; an insulating base 112, the insulating seat body 112 is connected to the transmission rod 111, the end of the elastic member 130 far away from the sliding piece 140 is connected to the insulating seat body 112; and a bracket 113, the bracket 113 is connected to the insulating The seat body 112 is connected and has the wing plate 1131 extending toward the sliding piece 140 in the predetermined direction. The insulating seat body 112 is made of non-conductive material. A mounting structure for mounting a spring, such as a mounting groove or a boss, is formed on the insulating base 112 .

For example, the transmission rod 111 moves under the action of the electromagnetic force of the driving structure. In an embodiment, as shown in FIG. 8 , the driving mechanism 150 includes a static iron core 152 , a moving iron core 151 and a second spring 154 . The moving iron core 151 and the static iron core 152 are arranged at intervals in a preset direction of the transmission mechanism 110 ; wherein, the transmission rod 111 passes through the static iron core 152 and is connected to the moving iron core 151 . Two ends of the second spring 154 abut against the static iron core 152 and the moving iron core 151 respectively. The moving iron core 151 moves toward the static iron core 152 under the action of the external magnetic field and compresses the second spring 154 to drive the transmission rod 111 to move, and the transmission rod 111 drives the insulating seat body 112 to move, and then drives the supporting structure to push the movable contact toward The static contact moves so that the moving contact and the static contact come into contact. When the external magnetic field disappears, the elastic force of the second spring 154 drives the moving iron core 151 to move away from the static iron core 152, so that the transmission rod 111 drives the insulating seat body 112 to move away from the static contact 200, so that the moving contact is separated from the static contact. touch.

In a specific implementation process, both ends of the second spring 154 respectively extend into the moving iron core 151 and the static iron core 152 . The transmission rod 111 passes through the hollow part of the second spring 154 and penetrates into the moving iron core 151 . Generally, the moving iron core 151 is screwed to the transmission rod 111 . In some optional embodiments, the moving iron core 151 and the transmission rod 111 may also be plugged, welded or riveted. Normally, the driving mechanism 150 further includes a cylinder body 153 and a magnetically conductive plate 155 , on which the static iron core 152 is fixed (eg, riveted, welded, or screwed). The cylinder body 153 is sleeved on the moving iron core 151 and the static iron core 152, and is fixed with the magnetically conductive plate 155 (such as riveted, welded, or threaded). Usually, a coil (not shown) for electricity is wound on the barrel 153 to apply a magnetic field to drive the moving iron core 151 to move.

In some other embodiments, the driving mechanism 150 may also be a mechanism capable of linear motion, such as an electric push rod, a cam mechanism, and the like.

As an optional implementation manner of the above-mentioned embodiment, the transmission rod 111 , the insulating base 112 and the bracket 113 are integrally formed. In this embodiment, since the end of the wing plate 1131 of the bracket 113 away from the insulating base 112 is not integrally formed with a structure for supporting the moving contact 120, the bracket 113, the insulating base 112 and the transmission rod 111 are integrally formed. , can reduce the forming difficulty of the transmission mechanism 110 and save the manufacturing cost. On the other hand, the integral formation of the transmission rod 111 , the insulating base 112 and the bracket 113 can prevent the transmission rod 111 from moving relative to the insulating base 112 and the bracket 113 , thereby preventing the transmission rod 111 from wearing and producing powder. In this embodiment, an installation ring platform and another installation sinking groove 11211 arranged around the installation ring platform are formed on the insulating base body 112 . The general part of the elastic member 130 is inserted into the other installation sink groove 11211, and the hollow part of the elastic member 130 is sleeved on the installation ring platform.

In some other optional embodiments, the bracket 113 , the transmission rod 111 and the insulating base 112 are independently molded components to reduce molding difficulty and save costs. The transmission mechanism 110 is formed by assembling the bracket 113 , the transmission rod 111 and the insulating base 112 . Wherein, as shown in FIG. 3 , the bracket 113 includes the wing plate 1131 and the bottom plate 1132; The above-mentioned wing plate 1131 defines an installation space 1133 . As shown in FIG. 3 , the insulating seat body 112 includes a first insulating seat 1121 and a second insulating seat 1122 ; the first insulating seat 1121 is formed with a sinking groove 11211 for installation, and the bottom plate 1132 is embedded in the sinking groove 11211 for installation Inside, the second insulating seat 1122 is installed in the installation space 1133 . When applying the structure of this embodiment, in the process of assembling the transmission mechanism 110, the bracket 113 is first inserted into the installation sink groove 11211 of the first insulating seat 1121, and then the second insulating seat 1122 is installed to the space defined by the bracket 113. In the installation space 1133 , this structure can effectively save the space occupied by the transmission mechanism 110 .

In a specific implementation process, the bottom plate 1132 of the bracket 113 and the bottom tank wall 11211a of the installation sinker 11211 are in close contact with each other. The wing plate 1131 extends out of the side groove wall of the first insulating seat 1121 in a predetermined direction, and also extends out of the second insulating seat 1122 . The second insulating seat 1122 is completely accommodated in the bracket 113 .

As an optional implementation of the above-mentioned embodiment, as shown in FIG. The first insulating seat 1121 has a first positioning surface 11213a facing away from the sliding piece 140, and the second insulating seat 1122 has Facing the second positioning surface 11221b of the sliding piece 140; the first insulating seat 1121 has a first mounting through hole 11212a, and the second insulating seat 1122 has a second mounting hole 11212a communicating with the first mounting through hole 11212a. Through hole 11222; at least part of the transmission rod 111 is disposed in the first installation through hole 11212a and the second installation through hole 11222, and the first positioning member 160 is in contact with the first positioning surface 11213a Then, the second positioning member 170 abuts against the second positioning surface 11221b. Through this structure, the first positioning member 160 and the second positioning member 170 abut against the first positioning surface 11213a on the first insulating seat 1121 and the second positioning surface 11221b on the second insulating seat 1122 respectively; the first positioning member 160 The second positioning member 170 is fixedly connected with the transmission rod 111, and is arranged at intervals in a predetermined direction; moreover, the transmission rod 111 is at least partially disposed in the first installation through hole 11212a of the first insulation and the second insulation seat 1122. The second is installed in the through hole 11222, so that the transmission rod 111, the first insulating seat 1121, the second insulating seat 1122, and the bracket 113 remain stationary in the preset direction.

As an optional implementation of the above-mentioned embodiment, as shown in FIG. 6 , the side of the body 112 of the second insulating base 1122 facing the sliding piece 140 is configured with a boss 11221 , and the boss 11221 is configured with the The second installation through hole 11222 communicates with the first receiving hole 11221a, the diameter of the first receiving hole 11221a is larger than the diameter of the second installation through hole 11222, so as to define the second positioning surface 11221b, the second The positioning member 170 is disposed in the receiving hole 11221a. In a specific implementation process, the transmission rod 111 penetrates into the second installation through hole 11222 . The second positioning member 170 connected to the transmission rod 111 is inserted into the receiving hole 11221a in the boss 11221, because the receiving hole 11221a communicates with the second installation through hole 11222, and the aperture of the receiving hole 11221a is larger than the aperture of the second installation through hole 11222 Therefore, the intersection of the receiving hole 11221 a and the second installation through hole 11222 defines a second limiting surface for limiting the second positioning member 170 to prevent the transmission rod 111 from moving away from the moving contact 120 .

As an optional implementation of the above-mentioned embodiment, as shown in FIG. 4 , the elastic member 130 is sleeved on the outside of the boss 11221 . The elastic member 130 is sheathed on the outside of the boss 11221 , so that the deformation of the elastic member 130 has directionality and avoids the distortion of the elastic member 130 .

As an optional implementation of the above-mentioned embodiment, as shown in FIG. 5 , the side of the body 112 of the first insulating base 1121 facing away from the sliding piece 140 is configured with a counterbore communicating with the first installation through hole 11212a. 11213, the diameter of the counterbore 11213 is larger than the diameter of the first installation through hole 11212a, so as to define the first positioning surface 11213a, and the first positioning member 160 is disposed in the counterbore 11213. In a specific implementation process, the transmission rod 111 first penetrates into the counterbore 11213 , then penetrates into the first installation through hole 11212 a , and then penetrates into the second installation through hole 11222 . The first positioning piece 160 connected to the transmission rod 111 is embedded in the counterbore 11213. Since the counterbore 11213 communicates with the first installation through hole 11212a, and the diameter of the counterbore 11213 is larger than the diameter of the first installation through hole 11212a, the counterbore 11213 The intersection with the first installation through hole 11212a defines a first limiting surface for limiting the first positioning member 160 to prevent the transmission rod 111 from moving toward the moving contact 120 . The transmission rod 111 can neither move toward the moving contact 120 relative to the insulating base body 112 nor move away from the moving contact 120 relative to the insulating base body 112 . When the driving mechanism 150 drives the transmission rod 111 to move, the transmission rod 111 remains still relative to the insulating base 112 .

In an embodiment, the first positioning member 160 may be fixed at the end of the transmission rod 111 . The second positioning member 170 can be fixed in the middle of the transmission rod 111 . For example, the end of the transmission rod 111 is provided with an internally threaded hole, and the first positioning member 160 may be a screw; the screw is screwed into the internally threaded hole. The middle part of the transmission rod 111 is provided with an external thread, and the second positioning member 170 can be a nut, and the nut is sleeved on the external thread of the transmission rod 111 .

As an optional implementation of the above-mentioned embodiment, as shown in FIG. 5 , the installation sinker 11211 has a bottom groove wall 11211a facing the sliding piece 140, and the first insulating seat 1121 has a A second limiting post 11212 on the wall 11211a and extending toward the moving contact 120 in the predetermined direction. The second insulating base 1122 is provided with a second limiting hole 11223; the bottom plate 1132 has an avoidance hole 1132a, and the second limiting post 11212 is inserted into the second limiting hole 11223 through the avoidance hole 1132a Inside. In a specific implementation process, when the bracket 113 is installed in the installation sinker 11211 , the second limiting post 11212 passes through the escape hole 1132a. When the second insulating seat 1122 is installed in the installation space 1133 of the bracket 113, the second limiting post 11212 is inserted into the second limiting hole 11223 of the second insulating seat 1122, so that the second insulating seat 1122 and the first insulating seat 1121 It remains relatively fixed under the positioning action of the first positioning member 160 and the second positioning member 170 .

In a specific implementation process, the second limiting hole 11223 communicates with the second installation through hole 11222 . A part of the first installation through hole 11212a is formed on the second limiting post 11212 . The transmission rod 111 passes through the counterbore 11213 , the first installation through hole 11212 a , the second limiting hole 11223 and the second installation through hole 11222 from the side of the first insulating seat 1121 facing away from the sliding plate 140 in sequence.

As shown in FIG. 1 or FIG. 8 , the embodiment of the present application also proposes a DC relay 10 , including: a static contact 200 and a contact bridge assembly 100 . The contact bridge assembly 100 adopts a part or all of the technical solutions of the foregoing embodiments, and thus possesses some or all of the technical advantages of the foregoing embodiments, so details will not be repeated here. The moving contact 120 and the static contact 200 are arranged at intervals in the preset direction of the transmission mechanism 110, and the moving contact 120 and the static contact 200 have a contact state of being in contact with each other and are separated from each other. state of separation.

In a specific implementation process, the DC relay 10 further includes a cover 300 . The housing 300 includes a ceramic seat 310 and a sealing tube 320 . The ceramic seat 310 defines a cavity, and the static contact 200 is welded on the ceramic seat 310 and protrudes into the cavity. There are two static contacts 200 , and the two static contacts 200 are arranged on the ceramic seat 310 at intervals. When the moving contact 120 is in contact with the two static contacts 200, the two static contacts 200 form an electrical circuit through the moving contacts 120; when the moving contact 120 is separated from the two static contacts 200, the two static contacts 200 disconnects the electrical connections. The sealing tube 320 is welded on the ceramic base 310 and welded to the magnetic conducting plate 155 of the contact bridge assembly 100 , and the magnetic conducting plate 155 seals the cavity of the ceramic base 310 . The moving contact 120 , the insulating base 112 , the bracket 113 and the elastic member 130 of the contact bridge assembly 100 are housed in the cavity of the ceramic base 310 . The magnetic guide plate 155 is provided with an installation through hole, and the transmission rod 111 protrudes from the cavity through the installation through hole and passes through the static iron core 152 to connect with the moving iron core 151 .

A contact bridge assembly and a DC relay provided in the embodiment of the present application have been introduced in detail above. In this paper, specific examples have been used to illustrate the principle and implementation of the utility model. The description of the above embodiment is only used to help understanding The method of the utility model and its core idea; at the same time, for those skilled in the art, according to the idea of the utility model, there will be changes in the specific implementation and application scope. In summary, the contents of this specification are not It should be understood as a limitation of the present utility model.

Claims (14)

1. A contact bridge assembly, characterized in that, comprising: Drive mechanism; a transmission mechanism, used to move in a preset direction driven by the driving mechanism; an elastic member and a moving contact, the opposite ends of the elastic member in the predetermined direction are respectively connected to the transmission mechanism and the moving contact; and a sliding piece, the sliding piece is arranged on the side of the moving contact away from the elastic member in the preset direction, and is connected with the moving contact; Wherein, the transmission mechanism has a wing plate extending toward the sliding piece, and the sliding piece is connected to the wing plate. 2. The contact bridge assembly according to claim 1, wherein the sliding piece has a bent section formed by bending toward the elastic member; Wherein, the bent section has a first side and a second side oppositely arranged, the first side is in contact with the wing plate, and the second side is in contact with the movable contact. 3. The contact bridge assembly according to claim 2, wherein the number of said bending sections is at least two, and at least two of said bending sections are respectively located between said sliding piece and said movable section. On opposite sides in the width direction of the contact, the distance between at least two of the bent sections in the width direction of the movable contact is greater than the width of the movable contact. 4. The contact bridge assembly according to any one of claims 1 to 3, wherein a first limiting hole is provided on the wing plate; A limiting column, the first limiting column is embedded in the first limiting hole, and the first limiting column can move along the preset direction in the first limiting hole. 5. The contact bridge assembly according to any one of claims 1 to 3, characterized in that, the sliding piece is welded and/or riveted to the moving contact. 6. The contact bridge assembly according to claim 1, wherein the transmission mechanism comprises: a transmission rod, the transmission rod is power-connected with the drive mechanism; an insulating seat body, the insulating seat body is connected to the transmission rod, and the end of the elastic member away from the sliding piece is connected to the insulating seat body; and A bracket, the bracket is connected to the insulating seat body, and has the wing plate formed to extend toward the sliding piece in the preset direction. 7. The contact bridge assembly according to claim 6, characterized in that, the transmission rod, the insulating seat body and the bracket are integrally formed. 8. The contact bridge assembly according to claim 6, wherein the bracket further comprises a bottom plate, the number of the wing plates is two, and the two wing plates are directed from opposite sides of the bottom plate to the The moving contact is extended, and the bottom plate and the two wing plates define an installation space; The insulating seat body includes a first insulating seat and a second insulating seat; the first insulating seat is formed with an installation sink, the bottom plate is embedded in the installation sink, and the second insulating seat is installed on the installation inside the space. 9. The contact bridge assembly according to claim 8, wherein the transmission mechanism further comprises a first positioning member and a second positioning member, and the first positioning member and the second positioning member are positioned at the predetermined The setting direction is arranged at intervals in the upper direction, and is respectively fixedly connected with the transmission rods; The first insulating seat has a first positioning surface away from the sliding piece, and the second insulating seat has a second positioning surface facing the sliding piece; the first insulating seat has a first installation through hole, so The second insulating seat has a second installation through hole communicating with the first installation through hole; At least part of the transmission rod is disposed in the first installation through hole and the second installation through hole, and the first positioning member is in contact with the first positioning surface, and the second positioning member is in contact with the first positioning surface. The second positioning surface abuts against. 10. The contact bridge assembly according to claim 9, characterized in that, a boss is formed on the side of the second insulating seat facing the sliding piece, and the boss is configured to communicate with the second installation channel. The holes are connected to the first receiving hole, the aperture of the first receiving hole is larger than the aperture of the second installation through hole, so as to define the second positioning surface, and the second positioning member is arranged in the receiving hole . 11. The contact bridge assembly according to claim 10, wherein the elastic member is sleeved on the outside of the boss. 12. The contact bridge assembly according to claim 9, characterized in that, a counterbore communicated with the first installation through hole is configured on the side of the first insulating base body facing away from the sliding piece, and the The aperture of the counterbore is larger than the aperture of the first installation through hole to define the first positioning surface, and the first positioning member is arranged in the counterbore. 13. The contact bridge assembly according to claim 8, wherein the installation sinker has a bottom groove wall facing the sliding piece, and the first insulating seat has a bottom groove wall arranged on the bottom groove wall and a second limit post extending toward the movable contact in the predetermined direction; The second insulating seat is provided with a second limiting hole; The bottom plate has an avoidance hole, and the second limiting column is inserted into the second limiting hole through the avoidance hole. 14. A DC relay, characterized in that it comprises: static contacts; and The contact bridge assembly according to any one of claims 1 to 13, wherein the moving contact and the static contact are arranged at intervals in a preset direction of the transmission mechanism, and the moving contact and the fixed contact The stationary contacts have a contact state in which they are in contact with each other and a separation state in which they are separated from each other.

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