Operating assembly and circuit breaker

Abstract

According to the operating mechanism and the circuit breaker, a cavity is formed in a handle, and a linkage part is arranged at the rear end of the cavity; the lower side of the damping part extends downwards to form a first friction surface, and the damping part can be driven by the linkage part to rotate relative to the handle; the upper end of the contact support extends upwards to form a second friction surface; an energy storage spring is arranged between the operating mechanism and the contact support; a moving contact holder; the double-moving-contact assembly is rotatably connected to the moving contact holder around a holder moving shaft, a support moving shaft is arranged perpendicular to the holder moving shaft, the energy storage effect is achieved through cooperation of a damping piece and a contact support, rapid closing can be achieved, contact ablation is reduced, the electrical life is prolonged, and the service life is prolonged. And meanwhile, the double-contact assembly is rotatably arranged relative to the contact support, so that the size difference of the two pairs of contacts is automatically compensated, the contact system is reliably connected, and an electrical loop of a product works reliably.

Description

Technical Field

[0001] The utility model specifically relates to an operating component and a circuit breaker. Background Art

[0002] Miniature circuit breakers are terminal devices of distribution lines, featuring small size and modularization, and are mainly used for protecting circuits. They are widely used in terminal power distribution for homes, office buildings, shopping malls, communication base stations, rural outdoor power distribution, etc. Currently, in the traditional miniature circuit breakers on the market, when manually closing the switch, the closing speed of the moving contact changes with the speed of the hand push, which easily causes arcing between the moving contact and the static contact, thus affecting the service life of the contact.

[0003] Meanwhile, in the technical field of low-voltage circuit breakers, improving the short-circuit breaking capacity has always been a difficult problem. For traditional circuit breakers, when only making partial modifications to the structure, if the breaking capacity is to be improved, the current-limiting capacity can be increased by increasing the opening distance of the circuit breaker, that is, increasing the arc length to increase the arc resistance, so as to achieve the purpose of improving the breaking capacity of the circuit breaker. However, the development trend of circuit breakers is increasingly towards miniaturization and compactness. How to improve the breaking capacity under the trend of reducing the volume of the circuit breaker has become a hot and key research issue. Summary of the Utility Model

[0004] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide an operating component and a circuit breaker.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] An operating component, comprising:

[0007] A handle, rotatably arranged in the housing, and having a chamber therein, and the rear end of the chamber is set as a linkage part;

[0008] A damping member, rotatably arranged in the chamber of the handle, and having a first friction surface extending downward on its lower side, and the damping member can be driven by the linkage part to rotate relative to the handle;

[0009] A contact support, configured to be rotatable around a rotating shaft, and the upper end of the contact support extends upward to form a second friction surface;

[0010] An operating assembly, configured to be rotatable around a rotating shaft, and the operating assembly is linked with the handle through a connecting rod, and a energy storage spring is arranged between the operating assembly and the contact support;

[0011] A double moving contact assembly, including a first moving contact and a second moving contact spaced apart from each other, rotatably connected to the contact support around a cage movement axis, and the cage movement axis is perpendicular to the rotating shaft,

[0012] When the first friction surface abuts against the second friction surface, the damping member has an energy storage state in which the handle drives the operating assembly to complete the energy storage operation of the energy storage spring, and when the state of the first friction surface abutting against the second friction surface is released, there is an energy release state in which the energy storage spring releases energy to drive the contact support and the double-moving contact assembly to quickly close the switch.

[0013] One end of the damping member is provided with an elastic portion, and the elastic portion presses against the handle.

[0014] The first friction surface is a convex arc surface, and the second friction surface is a correspondingly adapted concave arc surface.

[0015] The double-moving contact assembly is rotatably arranged on the contact support through a moving contact support.

[0016] The moving contact support is U-shaped and has a first arm and a second arm arranged oppositely and a connecting portion connecting the first arm and the second arm. The double-moving contact assembly is rotatably fixed on the connecting portion, and the first arm and the second arm are respectively fixedly connected to the contact support.

[0017] Mounting grooves are symmetrically arranged at the bottom of the contact support. An opening is provided at the bottom of the mounting groove. The first arm and the second arm are respectively inserted into the corresponding mounting grooves through the corresponding openings.

[0018] An arc-blocking piece is arranged between the double-moving contact assembly and the moving contact support.

[0019] The rotating shaft includes a first shaft section, a second shaft section and a shaft shoulder. The length of the first shaft section is greater than the length of the second shaft section. The shaft shoulder is located at the connection of the first shaft section and the second shaft section. The diameter of the shaft shoulder is greater than the diameter of the first shaft section or the second shaft section. The side of the shaft shoulder facing the second shaft section is set as a support surface for supporting the latch.

[0020] The energy storage spring includes a first energy storage spring and a second energy storage spring symmetrically arranged on both sides of the contact support. The first energy storage spring and the second energy storage spring are sleeved outside the rotating shaft.

[0021] A circuit breaker includes a housing, and the above-mentioned operating assembly is arranged in the housing.

[0022] Advantages of the present utility model: The application realizes the energy storage effect by the cooperation of the damping member and the contact support, can realize quick closing, reduce contact ablation, improve the electrical life. At the same time, the rotatable setting of the double-contact assembly relative to the contact support solves the problem that due to inconsistent welding dimensions of two pairs of contacts arranged side by side and inconsistent wear of the two pairs of contacts during operation, electrical non-conduction occurs, automatically compensates for the dimensional differences of the two pairs of contacts, enables the reliable connection of the contact system, and enables the reliable operation of the electrical circuit of the product. Description of the Drawings

[0023] Figure 1 This is a schematic structural view of the present utility model when cooperating with a static contact and an electromagnetic release.

[0024] Figure 2 This is a schematic structural view of the first friction surface and the second friction surface of the present utility model when they are in contact with each other.

[0025] Figure 3 This is a schematic structural view of the present utility model during energy storage.

[0026] Figure 4 This is a schematic structural view of the present utility model during energy release.

[0027] Figure 5 This is a schematic structural view of the present utility model.

[0028] Figure 6 This is a schematic structural view of the present utility model when the lock catch is separated.

[0029] Figure 7 This is an exploded view of the double contact assembly of the present utility model.

[0030] Figure 8 This is a schematic structural view of the present utility model when the energy storage spring is separated.

[0031] Figure 9 This is a schematic structural view of the double contact assembly and the moving contact support.

[0032] Figure 10 This is a schematic structural view of the rotating shaft.

[0033] Figure 11 This is a schematic structural view of the damping member. Detailed implementation manners

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If this specific posture changes, the directional indications will also change accordingly.

[0036] Such as Figure 1 And Figure 5As shown, it is a schematic structural diagram when the switch is off. Specifically, it discloses an operating component, which includes: a handle 100, a damping member 200, a contact support 300, an operating component 400, and a double-acting contact component 500. The handle is rotatably arranged inside the circuit breaker housing, and there is a chamber with an open bottom inside it. The damping member is rotatably arranged in the chamber and partially exposed, and the exposed part forms a first friction surface. The contact support is rotatably arranged in the housing through a rotating shaft, and a second friction surface extends from the side close to the handle. The operating component 400 includes a latch 410 and a trip 420. The trip 420 is fixed on the contact support 300 through a bracket 430. The latch is rotatably arranged in the housing through a rotating shaft, and the latch and the trip are lapped. The trip is linked with the handle through a U-shaped connecting rod. The double-acting contact component is rotatably connected with the contact support, and its connecting shaft is perpendicular to the rotating shaft.

[0037] The handle 100 is rotatably arranged in the housing, and there is a chamber inside it. The rear end of the chamber is set as a linkage part 110. There is a certain moving gap between the linkage part and the damping member. This moving gap allows the energy storage spring to be stressed to complete the energy storage action. At the same time, when the linkage part contacts the damping member, it can drive the damping member to rotate synchronously with the handle, thereby releasing the state of the two friction surfaces being in contact with each other.

[0038] As Figure 11 shown, the damping member 200 is rotatably arranged in the chamber of the handle 100, and a first friction surface 210 extends downward from its lower side. The damping member 200 can be driven by the linkage part to rotate relative to the handle 100. The shape of the damping member is similar to a wheel hub, which is beneficial for buffering and reducing the closing force during the energy storage process. At the same time, an elastic part is provided at the front end of the first friction surface of the damping member. The elastic part 220 presses against the handle 100. Then, when the two friction surfaces come into contact, it provides resistance for the first friction surface to be driven, so that the contact cooperation between the two can be achieved more quickly.

[0039] At the same time, the damping member is rotatably arranged in the chamber of the handle through a shaft, and a damping structure is provided at the mating part between it and the shaft, so that it is relatively fixed with the shaft.

[0040] The contact support 300 is configured to be rotatable around the rotating shaft, and a second friction surface 310 extends upward from the upper end of the contact support 300.

[0041] The two friction surfaces are adapted to each other, that is, the first friction surface 210 is a convex arc surface, and the second friction surface 310 is a concave arc surface adapted to it. This makes the cooperation between the two friction surfaces smoother, and the concave-convex design can also maintain the state of the two being in contact with each other, realizing reliable energy storage.

[0042] The operating component 400 is configured to be rotatable around a rotating shaft, and the operating component 400 is linked to the handle 100 through a connecting rod 600. A energy storage spring is provided between the operating component 400 and the contact support 300. The operating component rotates synchronously with the contact support through the energy storage spring. When the contact support is restricted, the energy storage spring can be compressed and continue to rotate, thereby completing the energy storage action.

[0043] The moving contact support 700 is fixedly arranged on the contact support, and it plays a role in supporting the double moving contact assembly.

[0044] The double moving contact assembly 500 includes a first moving contact and a second moving contact spaced apart from each other, and is rotatably connected to the moving contact support 700 around the movement axis of the cage. The movement axis of the cage is perpendicular to the rotating shaft. In this way, the two moving contacts have the effect of rotating around the movement axis of the cage, so that even when the sizes of the moving contacts and / or the static contacts are inconsistent, the moving contacts can respectively make reliable contact with the static contacts, realizing the automatic compensation of the double contact size difference.

[0045] The movement axis of the cage can be a rivet, and the double moving contact assembly is directly fixed on the moving contact support by riveting and cannot rotate relative to the rivet.

[0046] When the first friction surface 210 abuts against the second friction surface 310, the damping member 200 has an energy storage state in which the handle 100 drives the operating component 400 to complete the energy storage operation of the energy storage spring, and when the state of the first friction surface 210 abutting against the second friction surface 310 is released, it has an energy release state in which the energy storage spring releases energy to drive the contact support 700 and the double moving contact assembly 500 to quickly close.

[0047] As Figure 2 shown, when the handle moves in the closing direction, it drives the operating component and the contact support to act through a U-shaped connecting rod. When the second friction surface abuts against the first friction surface, the two surfaces contact and generate frictional force to prevent the contact support from continuing to move. The contact support and the moving contact are integrated, so that the moving contact and the static contact are kept at a certain distance and no longer continue to move.

[0048] As Figure 3 shown, when the handle continues to move in the closing direction, due to the contact support being blocked and remaining in place, the handle drives the operating component to continue to act through the U-shaped connecting rod, and the bracket starts to separate from the contact support, and the energy storage spring starts to be stressed and store energy. This is the process of mechanism energy storage.

[0049] As Figure 4As shown, when the handle continues to move in the closing direction, the linkage part of the handle contacts the damping element. At this time, the rotation of the handle drives the damping element to rotate relatively. When it rotates to a certain angle, the abutment state between the first friction surface and the second friction surface of the damping element is destroyed. At this time, the contact support can no longer maintain the unchanged position, that is, the two friction surfaces are separated, and the potential energy stored in the energy storage spring is sufficient to make the contacts close quickly and instantly. The whole process completes the rapid closing function.

[0050] like Figure 9 As shown, the movable contact support 700 is U-shaped, and has a first arm 710 and a second arm 720 arranged opposite to each other and a connecting portion 730 connecting the first arm 710 and the second arm 720. The double movable contact assembly 500 can be rotatably fixed on the connecting portion 730, and the first arm 710 and the second arm 720 are respectively fixedly connected to the contact support 300. The design of the stacked first arm and the second arm enables it to be more reliably fixed on the contact support.

[0051] The bottom of the contact support 300 is symmetrically provided with a mounting groove 320, and the bottom of the mounting groove 320 is provided with an opening. The first arm 710 and the second arm 720 are respectively inserted into the corresponding mounting groove 320 through the corresponding openings, which further improves the installation accuracy and ensures that the moving contact support can be installed in place.

[0052] like Figure 7 As shown, an arc blocking piece 900 is provided between the double moving contact assembly 500 and the moving contact support 700. The double moving contact assembly and the moving contact support are riveted together with the arc blocking piece, and the metal contact area is large. In order to reduce the friction force, the arc blocking piece made of red steel cardboard is added to reduce the relative friction area between them, so as to reduce the friction force when the moving contact rotates. The moving contact can rotate flexibly under the action of the closing force, and the automatic synchronization of the two pairs of contacts can be achieved after opening and closing.

[0053] like Figure 6 and Figure 9 As shown, the rotating shaft 800 includes a first shaft segment 810, a second shaft segment 820 and a shoulder 830, the length of the first shaft segment 810 is greater than the length of the second shaft segment 820, and the shoulder 830 is located at the connection between the first shaft segment 810 and the second shaft segment 820, and the diameter of the shoulder 830 is greater than the diameter of the first shaft segment 810 or the second shaft segment 820, and the side of the shoulder 830 facing the second shaft segment 820 is set as a support surface 840 for supporting the lock.

[0054] The shaft is designed with a circle of shoulders to reserve a certain amount of free space for the lock, which can prevent the product from slipping after assembly (after the mechanism is opened, the mechanism moves upward as a whole to compress the lock space).

[0055] like Figure 8As shown, the energy storage spring 310 includes a first energy storage spring 311 and a second energy storage spring 312 symmetrically arranged on both sides of the contact support 300, and the first energy storage spring 311 and the second energy storage spring 312 are sleeved outside the rotating shaft 800.

[0056] The energy storage springs are all designed as torsion springs. One end of each torsion spring is limited by the contact support, and the other end is linked with the bracket. The relative rotation of the bracket can be used to store energy in the torsion spring. At the same time, the upper and lower torsion springs are designed separately, which simplifies the assembly difficulty, makes the mechanism performance more reliable, and the two energy storage springs do not interfere with each other.

[0057] The present utility model also discloses a circuit breaker, which includes a housing, a static contact is arranged in the housing, and the above-mentioned operating assembly, and the moving contact of the operating assembly can perform opening and closing operations relative to the static contact.

[0058] The embodiments should not be regarded as limitations of the present utility model, but any improvements based on the spirit of the present utility model should be within the protection scope of the present utility model.

Claims

1. An operating component, characterized in that: It includes: A handle (100) rotatably arranged inside the housing, with a chamber formed therein, and a linkage part (110) arranged at the rear end of the chamber; A damping member (200) rotatably arranged inside the chamber of the handle (100), with a first friction surface (210) extending downward from its lower side, and the damping member (200) can be driven by the linkage part to rotate relative to the handle (100); A contact support (300) configured to be rotatable around a rotating shaft, and an upper end of the contact support (300) extends upward to form a second friction surface (310); An operating assembly (400) configured to be rotatable around a rotating shaft, and the operating assembly (400) is linked to the handle (100) through a connecting rod (600), and an energy storage spring is arranged between the operating assembly (400) and the contact support (300); A double-acting contact assembly (500), including a first moving contact and a second moving contact spaced apart from each other, rotatably connected to the contact support around a cage movement axis, and the cage movement axis is arranged perpendicular to the rotating shaft; When the first friction surface (210) abuts against the second friction surface (310), the damping member (200) has an energy storage state in which the handle (100) drives the operating assembly (400) to complete the energy storage operation of the energy storage spring, and when the state of the first friction surface (210) abutting against the second friction surface (310) is released, the energy storage spring releases energy to drive the contact support (700) and the double-acting contact assembly (500) to quickly close; 2. The operating component according to claim 1, wherein: An elastic part (220) is arranged at one end of the damping member (200), and the elastic part (220) presses against the handle (100).

3. The operating component according to claim 1 or 2, characterized in that: The first friction surface (210) is a convex arc surface, and the second friction surface (310) is a matching concave arc surface.

4. The operating component according to claim 1, wherein: The double-acting contact assembly is rotatably arranged on the contact support through a moving contact support (700).

5. The operating component according to claim 4, characterized in that: The moving contact support (700) is U-shaped, and has a first arm (710) and a second arm (720) arranged oppositely and a connecting part (730) connecting the first arm (710) and the second arm (720). The double-acting contact assembly (500) is rotatably fixed on the connecting part (730), and the first arm (710) and the second arm (720) are respectively fixedly connected to the contact support (300).

6. The operating component according to claim 5, wherein: Mounting grooves (320) are symmetrically arranged at the bottom of the contact support (300), and openings are arranged at the bottoms of the mounting grooves (320). The first arm (710) and the second arm (720) are respectively inserted into the corresponding mounting grooves (320) through the corresponding openings.

7. The operating component according to claim 4 or 5 or 6, characterized in that: An arc-blocking sheet (900) is arranged between the double-acting contact assembly (500) and the moving contact support (700).

8. The operating component according to claim 1, wherein: The rotating shaft (800) includes a first shaft section (810), a second shaft section (820) and a shaft shoulder (830). The length of the first shaft section (810) is greater than that of the second shaft section (820). The shaft shoulder (830) is located at the connection between the first shaft section (810) and the second shaft section (820). The diameter of the shaft shoulder (830) is greater than that of the first shaft section (810) or the second shaft section (820). One side of the shaft shoulder (830) facing the second shaft section (820) is provided with a support surface (840) for supporting the latch.

9. The operating component according to claim 1, wherein: The energy storage spring includes a first energy storage spring (311) and a second energy storage spring (312) symmetrically arranged on both sides of the contact support (300). The first energy storage spring (311) and the second energy storage spring (312) are sleeved outside the rotating shaft (800).

10. A circuit breaker, comprising a housing, characterized in that: The operation assembly according to any one of claims 1 to 9 is provided in the housing.

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