Contact system

Abstract

The utility model discloses a contact system, and the contact system is characterized in that a first hinge shaft is an integrated part, and the first hinge shaft comprises two first shaft parts and a first spacing part which connects the two first shaft parts; the device further comprises a spacer, the spacer is an integrated piece, and the spacer comprises two second shaft parts and a second spacer part connecting the two second shaft parts. A first shaft hole and a second shaft hole are formed in the contact blade, the first shaft hole is located in the contact mounting cavity, and the second shaft hole is located outside the contact mounting cavity; the first shaft holes are matched with the first shaft parts in size, and the two contact blades are arranged on the two first shaft parts in a sleeving mode through the first shaft holes respectively and are separated through a first interval part; the size of the second shaft hole is matched with that of the second shaft part, and the two contact blades are arranged on the second shaft part in a sleeving mode through the second shaft hole and are separated through the second interval part. According to the utility model, the two contact blades can be more convenient to produce, assemble and the like.

Description

Technical Field

[0001] The present application relates to the electrical field of low-voltage switches, and in particular to a circuit breaker, and in particular to a contact system of the circuit breaker. Background Art

[0002] The field of molded case circuit breakers is widely used in various fields, and it is divided into many specifications according to different rated currents. In some larger-sized frames, such as 800A molded case circuit breakers, in order to improve the current-carrying performance of a single pole, a double moving contact structure may often be adopted, that is, each pole has two moving contacts. And a certain gap often needs to be reserved between the two moving contacts of this double moving contact. The common practice is to punch out a first convex bulge on the first moving contact toward the second moving contact, and then punch out a second convex bulge on the second moving contact toward the first moving contact, and then use the two convex bulges to offset each other to create a reserved gap between the two. Simply put, the two moving contacts are in a mirror-symmetrical relationship. Such a structure makes the moving contact structure different. Two molds are required during production, and the two moving contact pieces also need to be classified separately during installation.

[0003] Therefore, the above structure is very inconvenient both from the perspective of producing the moving contact and from the perspective of assembly.

[0004] Based on this, how to design a contact system that ensures the consistency of the structures of the two moving contact pieces for easy production and assembly while also satisfying the requirement of a reserved gap between the two is a direction worthy of research. Summary of the invention

[0005] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and to provide a contact system that has the characteristics of simple structure and is easy to process and assemble.

[0006] A contact system, comprising a contact support, wherein at least two contact mounting sections are arranged on the contact support, each contact mounting section is provided with a contact mounting cavity, each contact mounting cavity is provided with two contact pieces arranged side by side and a mounting bracket, the mounting bracket is located in the contact mounting cavity, one end of the two contact pieces is located in the contact mounting cavity and is rotatably connected with the mounting bracket through a first hinge shaft, and the other ends of the two contact pieces extend out of the contact mounting cavity; wherein the first hinge shaft is an integral part, the first hinge shaft comprises two first shaft portions and a first spacing portion connecting the two first shaft portions, and the cross-sectional area of ​​the first spacing portion is greater than the cross-sectional area of ​​the first shaft portion ; It also includes a spacer, which is an integral part, and the spacer includes two second shaft portions and a second spacer portion connecting the two second shaft portions, and the cross-sectional area of ​​the second spacer portion is larger than the cross-sectional area of ​​the second shaft portion; A first shaft hole and a second shaft hole are opened on the contact piece, the first shaft hole is located in the contact mounting cavity, and the second shaft hole is located outside the contact mounting cavity; The size of the first shaft hole is consistent with the first shaft portion, and the two contact pieces are respectively mounted on the two first shaft portions through the first shaft hole and are separated by the first spacer portion; The size of the second shaft hole is consistent with the second shaft portion, and the two contact pieces are respectively mounted on the second shaft portion through the second shaft hole and are separated by the second spacer portion.

[0007] With this structure, the two contact pieces use the first spacing part and the second spacing part to form a gap, and the first spacing part, the second spacing part and the contact piece are separate, which allows the two contact pieces to use a common mold, and when feeding and assembling, workers can arbitrarily take two contact pieces for assembly, which solves the problem of inconvenience in processing and assembly caused by the non-uniform structure of the two contact pieces in the prior art. At the same time, since the first spacing part and the second spacing part are respectively arranged on the first hinge shaft and the spacing piece, and the first hinge shaft is located in the contact installation cavity, and the spacing piece is located outside the contact installation cavity, the two contact pieces are spaced at two different positions, which can effectively prevent the two contact pieces from forking and improve the stability of installation.

[0008] In some embodiments of the present application, the mounting bracket includes a first mounting bracket and a second mounting bracket; the first mounting bracket and the second mounting bracket each include a fixing portion and two supporting portions, the two supporting portions are connected via the fixing portion, all supporting portions are provided with a first rotation hole, and the two first shaft portions pass through the corresponding first shaft hole and the first rotation hole in sequence; or, the mounting bracket includes a first mounting bracket and a second mounting bracket; the first mounting bracket and the second mounting bracket each include a fixing portion and a supporting portion, the supporting portion is connected to the fixing portion, all supporting portions are provided with a first rotation hole, and the two first shaft portions pass through the corresponding first shaft hole and the first rotation hole in sequence.

[0009] With this structure, the first mounting bracket and the second mounting bracket are designed with this structure, which will make the assembly between the first mounting bracket, the second mounting bracket, the two contact pieces and the first hinge shaft easier and the installation is also very convenient.

[0010] In some embodiments of the present application, two first matching grooves are symmetrically arranged on the contact mounting cavity, and the two first matching grooves correspond one-to-one to the two first shaft portions. Each first shaft portion is provided with a sleeve, and the sleeve is located in the first matching groove; the first shaft portion is also provided with a clamping groove on one side of the sleeve, and a clamping ring is provided on the clamping groove, and the clamping ring is abutted against one side of the sleeve to ensure that the sleeve is stably located in the first matching groove.

[0011] With this structure, the sleeve is stably positioned in the first matching groove by means of a snap ring, thereby improving the matching stability between the first shaft portion and the contact mounting cavity.

[0012] In some embodiments of the present application, a second mating groove corresponding to the first mating groove is also provided on the contact mounting cavity, the second mating groove is connected to the first mating groove, and a slot opening of the second mating groove is opened on a surface of the contact mounting section; the first shaft portion is inserted into the second mating groove and the first mating groove along the slot opening of the second mating groove.

[0013] With this structure, the design of the first matching groove makes the installation of the first shaft portion more convenient. It only needs to be aligned with the second matching groove and pushed all the way inward to enter the first matching groove.

[0014] In some embodiments of the present application, two contact springs, two spring abutment plates, a second hinge shaft and an abutment shaft are also included; the two spring abutment plates are rotatably arranged in the contact mounting cavity through the second hinge shaft, one end of the contact spring abuts against the first surface of the spring abutment plate, and the other end of the contact spring abuts against the inner wall of the contact mounting cavity; a first flange is provided on the two contact sheets, a first matching hole is provided on the first flange, the abutment shaft passes through the two first matching holes and the abutment shaft abuts against the second surface of the spring abutment plate.

[0015] With this structure, the spring force can be transmitted to the contact piece by using the contact spring, the spring abutment plate, the first flange and the abutment shaft, so as to provide a certain medium pressure when the contact piece contacts the static contact of the circuit breaker.

[0016] In some embodiments of the present application, a first positioning boss is provided on the first surface of the spring abutment plate, and one end of the contact spring is sleeved on the first positioning boss; and / or a positioning groove is opened on the inner wall of the contact mounting cavity, and one end of the contact spring is located in the positioning groove.

[0017] With this structure, whether it is the design of the first positioning boss or the positioning groove, the stability of the contact spring installation will be greatly improved.

[0018] In some embodiments of the present application, the spring abutment plate includes a transition portion, an abutment portion and a current limiting portion, the transition portion is connected on both sides of the abutment portion, the spring abutment plate is sleeved on the second hinge shaft through the transition portion to form a rotating setting, the first surface of the abutment portion is used to abut the contact spring; the current limiting portion is connected above the abutment portion and the two are set at an obtuse angle, when the contact piece is extremely disconnected, the abutment shaft slides along the second surface of the abutment portion to the current limiting portion to ensure that the contact piece is in a repelled locked state.

[0019] By adopting this obtuse angle setting between the current limiting part and the abutment part, combined with the contact spring and the abutment shaft, the current limiting effect can be achieved. That is, when the contact piece is repelled due to the electric repulsion force, the abutment shaft can be stuck on the current limiting part to ensure that the contact piece is in a repelled and locked state, thereby greatly improving the breaking capacity of the product.

[0020] In some embodiments of the present application, there are two transition parts, which are spaced apart from each other, and a first protrusion extending into the space between the two transition parts is disposed in the contact mounting cavity.

[0021] With this structural design, the first protrusion extends into the gap between the two transition parts, which can produce a certain limiting effect on the transition part, so that the spring support plate is in a corresponding position to prevent deviation.

[0022] In some embodiments of the present application, a surface of the first protrusion is disposed toward the second hinge axis, and the surface is a curved surface.

[0023] With this arc surface structure design, when the second hinge shaft approaches the first protrusion, a certain avoidance effect can be achieved.

[0024] In some embodiments of the present application, each contact mounting section is provided with a mounting through hole, which is connected to the contact mounting cavity, and is used to install the second hinge shaft. The size of the mounting through hole in the first direction is larger than the diameter of the second hinge shaft, and the size in the second direction is consistent with the diameter of the second hinge shaft, and the first direction is perpendicular to the second direction.

[0025] With this structural design, the second hinged shaft can be installed into the contact mounting cavity through the mounting hole, and the second hinged shaft can be offset to a certain extent along the first direction. Such a design will allow the second hinged shaft to be offset to a certain extent in the first direction during actual use, so as to avoid the second hinged shaft damaging the contact mounting section due to excessive size restrictions. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 1 An exploded view of the contact system of Embodiment 1 of the present application is shown;

[0028] Figure 2 It shows a schematic structural diagram of the first hinge shaft in the contact system of Example 1 of the present application;

[0029] Figure 3 It shows a schematic structural diagram of a spacer in a contact system of Embodiment 1 of the present application;

[0030] Figure 4 A diagram showing the position relationship of two contact pieces in the contact system of Embodiment 1 of the present application is shown;

[0031] Figure 5 A structural schematic diagram of an implementation method of a mounting bracket in a contact system of Example 1 of the present application is shown;

[0032] Figure 6 A structural schematic diagram of another implementation of the mounting bracket in the contact system of Example 1 of the present application is shown;

[0033] Figure 7 A structural schematic diagram of another implementation mode of the mounting bracket in the contact system of Example 1 of the present application is shown;

[0034] Figure 8 A diagram showing the relationship between the contact piece and the mounting bracket in the contact system of Embodiment 1 of the present application is shown;

[0035] Fig. 9 A schematic diagram of the structure of the spring contact plate in the contact system of embodiment 1 of the present application is shown;

[0036] Fig.10 The contact support and its partial enlarged diagram in the contact system of embodiment 1 of the present application are shown;

[0037] Fig.11 The contact system of Example 1 of the present application and its partial enlarged diagram are shown;

[0038] Fig.12 A schematic diagram of the contact sheet of the contact system of Embodiment 1 of the present application when being connected with the stationary contact is shown;

[0039] Fig.13 FIG. 1 is a schematic diagram showing a contact piece of a contact system in Embodiment 1 of the present application when the contact piece is in the repelled and locked state. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0041] In the description of the present application, it should be understood that 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0042] In addition, the terms "primary" and "secondary" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "primary" and "secondary" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0043] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0044] In the present application, unless otherwise clearly specified and limited, when a main feature is “above” or “below” a second feature, it can mean that the main feature is in direct contact with the second feature, or the main feature is in indirect contact with the second feature through an intermediate medium. Moreover, when a main feature is “above”, “above” or “above” a second feature, it can mean that the main feature is directly above or obliquely above the second feature, or simply means that the main feature is higher in level than the second feature. When a main feature is “below”, “below” or “below” a second feature, it can mean that the main feature is directly below or obliquely below the second feature, or simply means that the main feature is lower in level than the second feature.

[0045] Example 1

[0046] like Figure 1-Figure 13 As shown, an embodiment of the present application provides a contact system, which is used in a molded case circuit breaker. Of course, the molded case circuit breaker here includes a thermal-magnetic molded case circuit breaker, an electronic molded case circuit breaker, a reclosing circuit breaker, a measuring switch, a fusion switch, etc.

[0047] The contact system here includes a contact support 1, and three contact mounting sections 10 are arranged on the contact support 1. Each contact mounting section 10 is provided with a contact mounting cavity 10a, and each contact mounting cavity 10a is used to mount a contact assembly of one pole, that is, a three-pole contact assembly can be mounted on the contact support 1. Of course, this is not only applicable to the case of a three-pole contact assembly, but also applicable to the case of a two-pole contact assembly or a four-pole contact assembly.

[0048] Since the arrangement of each pole contact assembly is basically the same, taking one group as an example, the contact assembly includes two contact pieces 20, a mounting bracket, a first hinge shaft 30 and a spacer 40. The two contact pieces 20 are arranged side by side and a reserved gap L is generated between the two. Here, the reserved gap L is generated by the first hinge shaft 30 and the spacer 40. The specific structure is:

[0049] One end of the two contact pieces 20 extends out of the contact installation cavity 10a, and the other end of the two contact pieces 20 is located in the contact installation cavity 10a and is rotatably connected to the installation bracket through the first hinge shaft 30. The first hinge shaft 30 is an integral part, and the first hinge shaft 30 includes two first shaft portions 31 and a first spacer portion 32 connecting the two first shaft portions 31, and the cross-sectional area of ​​the first spacer portion 32 is larger than the cross-sectional area of ​​the first shaft portion 31 (which can be understood as a stepped shaft). The spacer 40 is an integral part, and the spacer 40 includes two second shaft portions 41 and a second spacer portion 42 connecting the two second shaft portions 41, and the cross-sectional area of ​​the second spacer portion 42 is larger than the cross-sectional area of ​​the second shaft portion 41 (which can be understood as a stepped shaft). The contact piece 20 has a first axial hole 21 and a second axial hole 22. The first axial hole 21 is located in the contact installation cavity 10a, and the size of the first axial hole 21 matches the first shaft portion 31 (the size of the first axial hole 21 is smaller than the size of the first spacer 32). In this structure, when the first axial hole 21 is sleeved on the first shaft portion 31, the first spacer 32 will abut on the surface of the contact piece 20, so that a reserved gap L is formed between the two contact pieces 20. Here, the second axial hole 22 is located outside the contact installation cavity 10a. The size of the second axial hole 22 matches the second shaft portion 41 (the size of the second axial hole 22 is smaller than the size of the second spacer 42). In this structure, when the second axial hole 22 is sleeved on the second shaft portion 41, the second spacer 42 will abut on the surface of the contact piece 20, so that a reserved gap L is formed between the two contact pieces 20. In this way, a very stable reserved gap L can be formed by setting the two spacers.

[0050] The number of mounting brackets here can be one or two. Taking two mounting brackets as an example, the mounting bracket includes a first mounting bracket 51 and a second mounting bracket 52. The first mounting bracket 51 and the second mounting bracket 52 are mirror images of each other. The first mounting bracket 51 and the second mounting bracket 52 each include a fixed portion 50a and a supporting portion 50b. The supporting portion 50b is connected to the fixed portion 50a (forming an L-shape). All supporting portions 50b are provided with a first rotating hole 50c. The two first shaft portions 31 pass through the corresponding first shaft holes 21 and the first rotating holes 50c in sequence, thereby forming a rotating connection between the contact piece 20, the first hinge shaft 30 and the mounting bracket. Of course, the first mounting bracket 51 and the second mounting bracket 52 here may also include two supporting portions 50b, for example Figure 6 As shown, at this time, the two support parts 50b are connected to the fixing part 50a (forming a U-shape). Of course, only one mounting bracket can be provided here, such as Figure 7 As shown, it is equivalent to making the first mounting bracket 51 and the second mounting bracket 52 into an integrated structure, which can also achieve the above-mentioned effect.

[0051] A first matching groove 10a1 is also provided on the two side walls of the contact installation cavity 10a along the axial direction of the contact support 1. Here, there are two first matching grooves 10a1, which are symmetrically arranged. The first shaft portion 31 is sleeved with a shaft sleeve 33, and the end of each first shaft portion 31 and the shaft sleeve 33 extend into the first matching groove 10a1. Here, in order to ensure that the shaft sleeve 33 is stably located in the first matching groove 10a1, a clamping groove 31a is also provided on each first shaft portion 31, and a clamping ring 34 is provided on the clamping groove 31a. The clamping ring 34 abuts against a side surface of the shaft sleeve 33, thereby ensuring that the shaft sleeve 33 is stably located in the first matching groove 10a1. In order to facilitate the insertion of the rotating shaft into the first matching groove 10a1, second matching grooves 10a2 are also opened on the two side walls of the contact mounting cavity 10a along the axial direction of the contact support 1. The number of the second matching grooves 10a2 is two, and they correspond to and are connected with the first matching grooves 10a1 one by one. At the same time, the notch of the second matching groove 10a2 is set on the surface of the radial direction of the contact support 1 (that is, on a surface of the contact mounting section 10). In this way, during installation, the first shaft portion 31 can be aligned with the notch of the second matching groove 10a2 so that it can be installed into the second matching groove 10a2 and the first matching groove 10a1 along the notch of the second matching groove 10a2.

[0052] This contact system also includes an elastic structure for generating a medium pressure, wherein the elastic structure includes two contact springs 60, two spring abutment plates 61, a second hinge shaft 62 and an abutment shaft 63. The two spring abutment plates 61 are rotatably arranged in the contact mounting cavity 10a through the second hinge shaft 62, one end of each contact spring 60 abuts against the first surface of the corresponding spring abutment plate 61, and the other end of the contact spring 60 abuts against the inner wall of the contact mounting cavity 10a. The two contact pieces 20 are provided with a first flange 23, the first flange 23 is provided with a first matching hole 23a, the abutment shaft 63 passes through the two first matching holes 23a and the abutment shaft 63 abuts against the second surface of the spring abutment plate 61. Through the design of such a structure, the spring force of the contact spring 60 can act on the abutment shaft 63 through the spring abutment plate 61, thereby generating an elastic force on the contact piece 20, which can also be called a medium pressure. In order to make the contact spring 60 more stably installed, a first positioning boss 61a is provided on the first surface of the spring support plate 61, and a positioning groove 10a3 is provided on the inner wall of the contact installation cavity 10a. One end of the contact spring 60 is sleeved on the first positioning boss 61a, and the other end is in the positioning groove 10a3. Here, the second hinge shaft 62 is installed in the following manner: a mounting through hole 10a4 is provided on the contact installation section 10, and the mounting through hole 10a4 is connected with the contact installation cavity 10a. The mounting through hole 10a4 is provided along the axial direction of the contact support 1, so that the second hinge shaft 62 is inserted into the mounting through hole 10a4 and can be installed on the contact installation cavity 10a. The size of the mounting hole 10a4 in the first direction X is larger than the diameter of the second hinge shaft 62, and the size in the second direction Y is consistent with the diameter of the second hinge shaft 62. The first direction X and the second direction Y are perpendicular to each other, so that the second hinge shaft 62 can produce a certain offset in the first direction X when subjected to force.

[0053] The elastic structure mentioned above can also be made into a current limiting mechanism. The current limiting mechanism means that when the contact piece 20 is disconnected at the limit, the contact piece 20 is quickly repelled due to the electric repulsion force, and the current limiting mechanism can block it to keep it in the repelled state, which will be beneficial to disconnection. The current limiting structure here is specifically implemented as follows: the spring abutment plate 61 here includes a transition part 610, an abutment part 611 and a current limiting part 612. There are two transition parts 610, which are respectively connected to both sides of the abutment part 611. The spring abutment plate 61 is sleeved on the second hinge shaft 62 through the transition part 610 to form a rotation setting. A flow limiting portion 612 is arranged above the abutment portion 611, and the flow limiting portion 612 is connected to the abutment portion 611 to form an obtuse angle. The contact spring 60 abuts against the first surface of the abutment portion 611, and the abutment shaft 63 abuts against the second surface of the abutment portion 611 in the initial state. When the limit is disconnected, the abutment shaft 63 slides along the second surface of the abutment portion 611 to the second surface of the flow limiting portion 612, thereby ensuring that the contact piece 20 is in a repelled locked state.

[0054] A first protrusion 10a5 is provided in the contact installation cavity 10a. Here, there are two first protrusions 10a5. The first protrusion 10a5 extends into the gap between the two corresponding transition portions 610, and the surface of the first protrusion 10a5 facing the second hinge shaft 62 is an arc surface 10a6.

[0055] The above only exemplifies the structural design of one pole contact assembly, and the structures of the remaining poles are similar, which will not be described in detail here.

Claims

1. A contact system, comprising a contact support, wherein the contact support is provided with at least two contact mounting sections, each contact mounting section is provided with a contact mounting cavity, each contact mounting cavity is provided with two contact pieces arranged side by side and a mounting bracket, the mounting bracket is located in the contact mounting cavity, one end of the two contact pieces is located in the contact mounting cavity and is rotatably connected to the mounting bracket through a first hinge shaft, and the other ends of the two contact pieces extend out of the contact mounting cavity; characterized in that: The first hinge shaft is an integral part, comprising two first shaft portions and a first spacer portion connecting the two first shaft portions, and the cross-sectional area of ​​the first spacer portion is larger than the cross-sectional area of ​​the first shaft portion; the first hinge shaft also comprises a spacer, which is an integral part, comprising two second shaft portions and a second spacer portion connecting the two second shaft portions, and the cross-sectional area of ​​the second spacer portion is larger than the cross-sectional area of ​​the second shaft portions; a first shaft hole and a second shaft hole are provided on the contact piece, the first shaft hole is located in the contact mounting cavity, and the second shaft hole is located outside the contact mounting cavity; the size of the first shaft hole is consistent with that of the first shaft portion, and the two contact pieces are respectively sleeved on the two first shaft portions through the first shaft hole, and are separated by the first spacer portion; the size of the second shaft hole is consistent with that of the second shaft portion, and the two contact pieces are respectively sleeved on the second shaft portion through the second shaft hole, and are separated by the second spacer portion.

2. A contact system according to claim 1, characterized in that: The mounting bracket includes a first mounting bracket and a second mounting bracket, each of the first mounting bracket and the second mounting bracket includes a fixing portion and two supporting portions, the two supporting portions are connected via the fixing portion, all supporting portions are provided with a first rotation hole, and the two first shaft portions sequentially pass through the corresponding first shaft hole and the first rotation hole; or, the mounting bracket includes a first mounting bracket and a second mounting bracket, each of the first mounting bracket and the second mounting bracket includes a fixing portion and a supporting portion, the supporting portion is connected to the fixing portion, all supporting portions are provided with a first rotation hole, and the two first shaft portions sequentially pass through the corresponding first shaft hole and the first rotation hole.

3. A contact system according to claim 1, characterized in that: Two first matching grooves are symmetrically arranged on the contact mounting cavity, and the two first matching grooves correspond one by one to the two first shaft portions. Each first shaft portion is sleeved with a sleeve, and the sleeve is in the first matching groove. The first shaft portion is also provided with a clamping groove on one side of the sleeve, and a clamping ring is provided on the clamping groove, and the clamping ring is abutted against one side of the sleeve to ensure that the sleeve is stably located in the first matching groove.

4. A contact system according to claim 3, characterized in that: The contact mounting cavity is also provided with a second mating groove corresponding to the first mating groove. The second mating groove is connected to the first mating groove, and the slot of the second mating groove is opened on a surface of the contact mounting section; the first shaft portion is inserted into the second mating groove and the first mating groove along the slot of the second mating groove.

5. A contact system according to claim 1, characterized in that: It also includes two contact springs, two spring abutment plates, a second hinge shaft and an abutment shaft; the two spring abutment plates are rotatably arranged in the contact mounting cavity through the second hinge shaft, one end of the contact spring abuts against the first surface of the spring abutment plate, and the other end of the contact spring abuts against the inner wall of the contact mounting cavity; a first flange is arranged on the two contact sheets, a first matching hole is arranged on the first flange, the abutment shaft is arranged through the two first matching holes and the abutment shaft abuts against the second surface of the spring abutment plate.

6. A contact system according to claim 5, characterized in that: A first positioning boss is arranged on the first surface of the spring abutment plate, and one end of the contact spring is sleeved on the first positioning boss; and / or a positioning groove is opened on the inner wall of the contact installation cavity, and one end of the contact spring is located in the positioning groove.

7. A contact system according to claim 5, characterized in that: The spring abutment plate includes a transition portion, an abutment portion and a current limiting portion. The transition portion is connected to both sides of the abutment portion. The spring abutment plate is sleeved on the second hinge shaft through the transition portion to form a rotating setting. One surface of the abutment portion is used to abut the contact spring; the current limiting portion is connected above the abutment portion and the two are set at an obtuse angle. When the contact piece is extremely disconnected, the abutment shaft slides along the abutment portion to the current limiting portion to ensure that the contact piece is in a repelled and locked state.

8. A contact system according to claim 5, characterized in that: There are two transfer parts, which are spaced apart from each other. A first protrusion extending into the space between the two transfer parts is arranged in the contact installation cavity.

9. A contact system according to claim 8, characterized in that: A surface of the first protrusion is arranged toward the second hinge axis, and the surface is an arc surface.

10. A contact system according to claim 5 or 6 or 7 or 8 or 9, characterized in that: A mounting through hole is provided on each contact mounting section, the mounting through hole is connected to the contact mounting cavity, the mounting through hole is used to install the second hinge shaft, and the size of the mounting through hole in the first direction is larger than the diameter of the second hinge shaft, and the size of the mounting through hole in the second direction is consistent with the diameter of the second hinge shaft, and the first direction and the second direction are perpendicular to each other.

Images