RCCB type electric leakage tripping mechanism and electric leakage protector

Abstract

The application discloses a RCCB type electric leakage tripping mechanism and an electric leakage protector, wherein the RCCB type electric leakage tripping mechanism comprises a rotating piece for connecting a movable contact, a counterforce spring is connected to the rotating piece, a lower connecting rod is rotatably connected to one side of the rotating piece, a handle is connected to the outside of the lower connecting rod through a U-shaped connecting rod, a middle connecting rod is buckled and connected to the end of the lower connecting rod, a first limiting surface for limiting the rotation of the lower connecting rod is arranged on the middle connecting rod, an included angle is formed between the middle connecting rod and the U-shaped connecting rod and the direction of the included angle is towards the first limiting surface, a jump buckle is arranged on one side of the middle connecting rod, a jump buckle spring is connected to the jump buckle, a first driving part matched with the middle connecting rod is arranged in the middle of the jump buckle, and a tripping device is connected to the outside of the jump buckle through a limiting assembly. The application has the characteristics of good tripping effect.

Description

Technical Field

[0001] This invention relates to an RCCB type residual current device, and more particularly to an RCCB type residual current tripping mechanism and a residual current device. Background Technology

[0002] Currently, residual current devices (RCCDs) are divided into RCCB and RCBO types. Due to differences in the materials, sizes, and distribution of components within these two types, the structures and tripping methods of their actuators also differ. This means manufacturers need to design the actuators specifically for the characteristics of RCCB-type RCDs. However, the actuators of current RCCB-type RCDs generally suffer from complex structures and poor tripping stability, failing to meet manufacturers' performance requirements.

[0003] Therefore, a RCCB type leakage tripping mechanism with good tripping effect is needed. Summary of the Invention

[0004] The purpose of this invention is to provide an RCCB-type leakage current tripping mechanism and a leakage current protector. It features good tripping performance.

[0005] The technical solution of the present invention: an RCCB type leakage tripping mechanism, including a rotating component for connecting a moving contact, a reaction spring connected to the rotating component, a lower connecting rod rotatably connected to one side of the rotating component, a handle connected to the outside of the lower connecting rod via a U-shaped connecting rod, a middle connecting rod fastened to the end of the lower connecting rod, a first limiting surface provided on the middle connecting rod for limiting the rotation of the lower connecting rod, an angle formed between the middle connecting rod and the U-shaped connecting rod with the angle direction facing the first limiting surface, a jump buckle provided on one side of the middle connecting rod, a jump buckle spring connected to the jump buckle, a first driving part cooperating with the middle connecting rod provided in the middle of the jump buckle, and a tripping device connected to the outside of the jump buckle via a limiting component;

[0006] The middle connecting rod is used to limit the lower connecting rod through the first limiting surface when the circuit is closed, so that the lower connecting rod cannot be pushed outward by the elastic force of the reaction spring.

[0007] The jump spring is used to apply a compressive force to the first drive unit in the direction of the middle connecting rod;

[0008] The limiting component is used to limit the trip lever when the circuit is closed, so that the first drive part and the middle connecting rod are separated from each other, and the limiting of the trip lever is released after the trip unit is pushed out.

[0009] The jump buckle is used to press the middle link through the first drive part after the limit is released by the elastic force of the jump buckle spring, so that the middle link releases the limit on the lower link.

[0010] In the aforementioned RCCB type leakage tripping mechanism, a middle connecting rod spring is connected to the middle connecting rod, and the middle connecting rod spring is used to apply a compressive force toward the lower connecting rod to the middle connecting rod.

[0011] In the aforementioned RCCB type leakage tripping mechanism, a fastening groove is formed in the middle of the middle connecting rod, and a first limiting surface and a second limiting surface are formed on both sides of the fastening groove, respectively. An included angle is formed between the first limiting surface and the second limiting surface, and the second limiting surface is used to fit against the lower connecting rod under the squeezing force of the middle connecting rod spring.

[0012] In the aforementioned RCCB type leakage tripping mechanism, the limiting component includes a reset plate and a latch. One side of the reset plate is provided with a tripping surface that cooperates with the tripping device, and the other side of the reset plate is provided with a second driving part that cooperates with the latch. A latching spring is connected to the latch, and one side of the latch is provided with a third limiting surface for limiting the tripping device.

[0013] The reset plate is used to press the latch after the trip unit is ejected;

[0014] The latch is used to separate the third limiting surface from the jumper after being squeezed by the latch, thereby releasing the limiting of the jumper.

[0015] The locking spring is used to drive the locking plate to reset after it disengages from the locking plate.

[0016] In the aforementioned RCCB type leakage tripping mechanism, one side of the rotating component is provided with a pressure plate that cooperates with the tripping buckle. The pressure plate is used to drive the tripping buckle to reset by squeezing after the circuit is opened.

[0017] In the aforementioned RCCB type leakage tripping mechanism, a reset part is provided on one side of the reset plate, a reset spring is provided on the outside of the reset part, and a third drive part is provided on the handle to cooperate with the reset spring;

[0018] The third drive unit is used to squeeze and limit the reset spring when the circuit is closed, so that the reset spring and the reset plate are separated from each other, and to release the squeezing and limiting of the reset spring after the circuit is opened.

[0019] The reset spring is used to reset the reset plate by rebounding after the limit is released, and the reset plate causes the trip unit to retract and reset after being reset.

[0020] A residual current device (RCCB) is also provided, which includes the aforementioned RCCB type residual current tripping mechanism.

[0021] The residual current device includes a mounting housing, a rotating component rotatably connected inside the mounting housing and connected to the mounting housing via a reaction spring, a moving contact connected to the rotating component, a stationary contact fixedly connected to the mounting housing on one side of the moving contact, a central connecting rod and a trip spring coaxially rotatably connected inside the mounting housing, and the trip spring and the mounting housing are interconnected via a trip spring.

[0022] Compared with the prior art, the present invention has the following characteristics:

[0023] (1) The present invention enables the U-shaped link, lower link, middle link and trip button to form a four-link structure in the closed state by coordinating the structure of the U-shaped link, lower link, middle link and trip button. The middle link and the first limiting surface are used to limit the lower link and U-shaped link, so that the lower link cannot be pushed out towards the first limiting surface under the action of the reaction spring, thus ensuring the stability of the rotating part in the closed state. When the trip button is pushed out, the limiting component releases the limit on the trip button, so that the first driving part pushes the middle link under the action of the trip button spring to separate it from the lower link. Thus, the lower link can continue to push outward after losing the limit of the middle link. At the same time, the rotating part can drive the moving contact to separate from the stationary contact under the action of the reaction spring after the limit is released, thus realizing the opening action.

[0024] (2) By limiting the structure of the limiting component, the latch can limit the trip latch when the gate is closed, so that the middle connecting rod remains in a stable latching and limiting state; when the trip unit is pushed out, the reset plate can move accordingly and drive the latch to release the limit on the trip latch, so that the trip latch can use the first drive part to push the middle connecting rod to separate it from the lower connecting rod, thereby ensuring the stability of the opening action of the rotating part; on this basis, by the cooperation of the pressure plate, the third drive part and the reset spring, the trip latch and the reset plate can be reset after the gate opening action is completed, and the reset plate drives the trip unit to retract and reset during the reset process, thereby improving the operation stability of the present invention;

[0025] Therefore, the present invention has the characteristic of good tripping effect. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the present invention in the open state;

[0027] Figure 2 This is a schematic diagram of the structure of the present invention in the closed state;

[0028] Figure 3 yes Figure 2 Connection structure diagram of the middle link and the lower link;

[0029] Figure 4 This is an exploded view of the RCCB type leakage current tripping mechanism;

[0030] Figure 5This is a schematic diagram of the structure of the present invention when the trip unit is ejected.

[0031] The labels in the attached diagram are as follows: 1-rotating component, 2-reaction spring, 3-lower connecting rod, 4-U-shaped connecting rod, 5-handle, 6-middle connecting rod, 7-jump buckle, 8-jump buckle spring, 9-release device, 10-middle connecting rod spring, 11-reset plate, 12-lock buckle, 13-lock buckle spring, 14-reset spring, 100-mounting housing, 200-moving contact, 300-stationary contact, 101-pressure plate, 501-third driving part, 601-first limiting surface, 602-clamping groove, 603-second limiting surface, 701-first driving part, 111-release surface, 112-second driving part, 113-reset part, 121-third limiting surface. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0033] Example 1. An RCCB type leakage current tripping mechanism, configured as follows: Figure 1-5 As shown, it includes a rotating part 1 for connecting a moving contact, a reaction spring 2 connected to the rotating part 1, a lower connecting rod 3 rotatably connected to one side of the rotating part 1, a handle 5 connected to the outside of the lower connecting rod 3 via a U-shaped connecting rod 4, the lower connecting rod 3 and the U-shaped connecting rod 4 are interlocked and form a rotatable connection, a middle connecting rod 6 is fastened to the end of the lower connecting rod 3, the middle connecting rod 6 is provided with a first limiting surface 601 for rotating and limiting the lower connecting rod 3, the middle connecting rod 6 and the U-shaped connecting rod 4 form an angle of less than 180° and the angle direction is towards the first limiting surface 601, a jump buckle 7 is provided on one side of the middle connecting rod 6, a jump buckle spring 8 is connected to the jump buckle 7, the elastic force of the jump buckle spring 8 is less than the elastic force of the reaction spring 2, a first driving part 701 that cooperates with the middle connecting rod 6 is provided in the middle of the jump buckle 7, and a release device 9 is connected to the outside of the jump buckle 7 via a limiting component;

[0034] The middle connecting rod 6 is used to limit the lower connecting rod 3 through the first limiting surface 601 when the circuit is closed, so that the lower connecting rod 3 cannot be pushed outward by the elastic force of the reaction spring 2.

[0035] The jump spring 8 is used to apply a compressive force to the first drive unit 701 in the direction of the middle connecting rod 6;

[0036] The limiting component is used to limit the trip lever 7 when the circuit is closed, so that the first drive unit 701 and the middle connecting rod 6 are separated from each other, and the limiting of the trip lever 7 is released after the trip unit 9 is pushed out.

[0037] The jump buckle 7 is used to press the middle connecting rod 6 through the first drive part 701 after the limit is released by the elastic force of the jump buckle spring 8, so that the middle connecting rod 6 releases the limit on the lower connecting rod 3.

[0038] A middle link spring 10 is connected to the middle link 6. The middle link spring 10 is used to apply a squeezing force to the middle link 6 toward the lower link 3, so that the middle link 6 remains engaged with the lower link 3 when it does not contact the jump buckle 7.

[0039] The middle connecting rod 6 has a fastening groove 602 in the middle, and a first limiting surface 601 and a second limiting surface 603 are formed on both sides of the fastening groove 602. An angle is formed between the first limiting surface 601 and the second limiting surface 603. The second limiting surface 603 is used to fit against the lower connecting rod 3 under the squeezing force of the middle connecting rod spring 10.

[0040] The limiting assembly includes a reset plate 11 and a latch 12. One side of the reset plate 11 is provided with a release surface 111 that engages with the release device 9, and the other side of the reset plate 11 is provided with a second driving part 112 that engages with the latch 12. A latch spring 13 is connected to the latch 12. One side of the latch 12 is provided with a third limiting surface 121 for limiting the jumper 7. The latch 12 on one side of the third limiting surface 121 is provided with an opening for the jumper 7 to pass through.

[0041] The reset plate 11 is used to press the latch 12 after the trip unit 9 is ejected;

[0042] The latch 12 is used to separate the third limiting surface 121 from the jump buckle 7 after being squeezed by the latch 12, thereby releasing the limiting of the jump buckle 7;

[0043] The locking spring 13 is used to drive the locking 12 to reset after the reset plate 11 is disengaged from the locking 12.

[0044] One side of the rotating component 1 is provided with a pressure plate 101 that cooperates with the jump buckle 7. The pressure plate 101 is used to reset the jump buckle 7 by squeezing after the gate is opened.

[0045] The reset plate 11 has a reset part 113 on one side, a reset spring 14 on the outside of the reset part 113, and a third drive part 501 that cooperates with the reset spring 14 on the handle 5.

[0046] The third drive unit 501 is used to squeeze and limit the reset spring 14 when the circuit is closed, so that the reset spring 14 is separated from the reset plate 11, and to release the squeezing and limiting of the reset spring 14 after the circuit is opened.

[0047] The reset spring 14 is used to reset the reset plate 11 by rebounding after the limit is released, and to cause the reset plate 11 to retract and reset the trip unit 9 after the reset.

[0048] The working principle of this invention is as follows: When the leakage current tripping mechanism is in the closed state, the handle 5 presses the reset spring 14 through the third drive part 501, causing the reset spring 14 and the reset part 113 to be separated from each other. This allows the reset plate 11 to be in a free-floating state and to be pressed against the trip unit 9 by the latch 12 and the latch spring 13. At the same time, the trip latch 7 is limited by the third limiting surface 121, causing the first drive part 701 and the middle connecting rod 6 to separate from each other, and the trip latch spring 8 is in a contracted state. At this time, the reaction spring 2 is in a compressed state and applies an upwardly inclined pressing force to the lower connecting rod 3. Meanwhile, the U-shaped connecting rod 4 is limited by the handle 5 and forms an angle with the lower connecting rod 3. As a result, the connection point between the lower connecting rod 3 and the U-shaped connecting rod 4 moves towards the first limiting surface 601 under the action of the reaction spring 2 and is held in the closed state by the latching limit of the middle connecting rod 6.

[0049] by Figure 2 Taking the installation position of each component as an example, when the trip unit 9 is pushed out, the reset plate 11 is subjected to a squeezing force and rotates counterclockwise. This, in turn, drives the latch 12 to overcome the spring force of the latch spring 13 and rotate clockwise via the second drive unit 112. After the latch 12 rotates clockwise, the third limiting surface 121 separates from the jump latch 7, thus releasing the restriction on the jump latch 7. This causes the jump latch 7 to rotate clockwise under the action of the jump latch spring 8, and the first drive unit 701 applies an upward squeezing force to the middle connecting rod 6, causing the middle connecting rod 6 to separate from the lower connecting rod 3 under this squeezing force, thus releasing the restriction on the rotating component 1. After the rotating component 1 is released from its restriction, it will rotate counterclockwise under the action of the return spring 2, thus separating the moving contact 200 and the stationary contact 300. Simultaneously, the pressure plate 101, along with the rotation of the rotating component 1, squeezes the jump latch 7, causing the jump latch 7 to move counterclockwise and return to its original position. When the handle 5 changes from the closed state to the open state, the third drive unit 501 releases the compression limit on the reset spring 14, so that after the reset spring 14 rebounds, it drives the reset plate 11 to rotate clockwise via the reset unit 113, thereby realizing the reset and retraction of the trip unit 9 and releasing the compression limit on the latch 12, so that the latch 12 returns to the limit position.

[0050] Similarly, when the handle 5 is closed, the U-shaped connecting rod 4 applies a downward squeezing force to the lower connecting rod 3 as the handle 5 rotates, causing both to return to the closed position. During the movement of the lower connecting rod 3, the middle connecting rod 6 remains in contact with the lower connecting rod 3 under the action of the middle connecting rod spring 10, and when the lower connecting rod 3 moves to the closed position, it is re-engaged and limited by the first limiting surface 601 to achieve the closing effect.

[0051] Example 2. Residual current device, configured as follows: Figure 5As shown, the residual current device (RCD) includes a mounting housing 100, a moving contact 200, and a stationary contact 300. The moving contact 200 is externally connected to an RCCB-type residual current tripping mechanism as described in Embodiment 1. A rotating component 1 is rotatably connected inside the mounting housing 100 and connected to the mounting housing 100 via a reaction spring 2. The moving contact 200 is connected to the rotating component 1. The stationary contact 300 is located on one side of the moving contact 200 and is fixedly connected to the mounting housing 100. The central connecting rod 6 and the trip spring 7 are coaxially rotatably connected inside the mounting housing 100. The central connecting rod 6 and the mounting housing 100 are interconnected via a central connecting rod spring 10, and the trip spring 7 and the mounting housing 100 are interconnected via a trip spring 8.

[0052] The reset plate 11 is rotatably connected inside the mounting shell 100 and connected to the mounting shell 100 via the reset spring 14. The latch 12 is rotatably connected inside the mounting shell 100 and connected to the mounting shell 100 via the latch spring 13.

[0053] This embodiment limits the installation method of the RCCB type leakage current tripping mechanism, so that the RCCB type leakage current tripping mechanism in Embodiment 1 can be stably used in the leakage current protector and realize its leakage current protection function.

Claims

1. An RCCB type leakage current tripping mechanism, characterized in that: It includes a rotating part (1) for connecting the moving contact, a reaction spring (2) connected to the rotating part (1), a lower connecting rod (3) rotatably connected to one side of the rotating part (1), a handle (5) connected to the outside of the lower connecting rod (3) via a U-shaped connecting rod (4), a middle connecting rod (6) fastened to the end of the lower connecting rod (3), a first limiting surface (601) for rotating and limiting the lower connecting rod (3) on the middle connecting rod (6), an angle is formed between the middle connecting rod (6) and the U-shaped connecting rod (4) and the angle direction is towards the first limiting surface (601), a jump buckle (7) is provided on one side of the middle connecting rod (6), a jump buckle spring (8) is connected to the jump buckle (7), a first driving part (701) that cooperates with the middle connecting rod (6) is provided in the middle of the jump buckle (7), and a release device (9) is connected to the outside of the jump buckle (7) via a limiting component; The middle connecting rod (6) is used to limit the lower connecting rod (3) through the first limiting surface (601) when the circuit is closed, so that the lower connecting rod (3) cannot be pushed outward by the elastic force of the reaction spring (2); The jump spring (8) is used to apply a compressive force to the first drive unit (701) in the direction of the middle connecting rod (6); The limiting component is used to limit the trip lever (7) when the circuit is closed, so that the first drive unit (701) and the middle connecting rod (6) are separated from each other, and the limiting of the trip lever (7) is released after the trip unit (9) is pushed out; The jump buckle (7) is used to press the middle connecting rod (6) through the first drive part (701) by the elastic force of the jump buckle spring (8) after the limit is released, so that the middle connecting rod (6) releases the limit on the lower connecting rod (3).

2. The RCCB type leakage tripping mechanism according to claim 1, characterized in that: A middle link spring (10) is connected to the middle link (6), and the middle link spring (10) is used to apply a compressive force toward the lower link (3) to the middle link (6).

3. The RCCB type leakage tripping mechanism according to claim 2, characterized in that: The middle connecting rod (6) has a fastening groove (602) in the middle. The fastening groove (602) has a first limiting surface (601) and a second limiting surface (603) on both sides. An angle is formed between the first limiting surface (601) and the second limiting surface (603). The second limiting surface (603) is used to fit with the lower connecting rod (3) under the squeezing force of the middle connecting rod spring (10).

4. The RCCB type leakage tripping mechanism according to claim 1, characterized in that: The limiting assembly includes a reset plate (11) and a latch (12). One side of the reset plate (11) is provided with a release surface (111) that cooperates with the release device (9), and the other side of the reset plate (11) is provided with a second driving part (112) that cooperates with the latch (12). A latch spring (13) is connected to the latch (12), and one side of the latch (12) is provided with a third limiting surface (121) for limiting the jumper (7). The reset plate (11) is used to press the latch (12) after the trip unit (9) is ejected; The latch (12) is used to separate the third limiting surface (121) from the jumper (7) after being squeezed by the latch (12), thereby releasing the limiting of the jumper (7); The locking spring (13) is used to drive the locking (12) to reset after the reset plate (11) disengages from the locking (12).

5. The RCCB type leakage tripping mechanism according to claim 4, characterized in that: The rotating part (1) is provided with a pressure plate (101) on one side to cooperate with the jump buckle (7). The pressure plate (101) is used to drive the jump buckle (7) to reset by squeezing after the gate is opened.

6. The RCCB type leakage tripping mechanism according to claim 4, characterized in that: The reset plate (11) has a reset part (113) on one side, and a reset spring (14) is provided on the outside of the reset part (113). The handle (5) is provided with a third drive part (501) that cooperates with the reset spring (14). The third drive unit (501) is used to squeeze and limit the reset spring (14) when the circuit is closed, so that the reset spring (14) and the reset plate (11) are separated from each other, and to release the squeezing and limiting of the reset spring (14) after the circuit is opened. The reset spring (14) is used to reset the reset plate (11) by rebounding after the limit is released, and to cause the reset plate (11) to retract and reset the trip unit (9) after the reset.

7. A residual current device (RCD), characterized in that: The residual current device includes an RCCB type residual current tripping mechanism as described in any one of claims 1-6.

8. The residual current device according to claim 7, characterized in that: The device includes a mounting housing (100), a rotating component (1) which is rotatably connected inside the mounting housing (100) and connected to the mounting housing (100) via a reaction spring (2), a moving contact (200) connected to the rotating component (1), and a stationary contact (300) which is fixedly connected to the mounting housing (100) on one side of the moving contact (200). The connecting rod (6) and the jump buckle (7) are coaxially rotatably connected inside the mounting housing (100), and the jump buckle (7) and the mounting housing (100) are connected to each other via a jump buckle spring (8).

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