RCCB type leakage tripping mechanism and leakage protector

Abstract

The RCCB type electric leakage tripping mechanism comprises a rotating piece used for being connected with a moving contact, the rotating piece is connected with a counter-force spring, one side of the rotating piece is rotationally connected with a lower connecting rod, the outer portion of the lower connecting rod is connected with a handle through a U-shaped connecting rod, the end of the lower connecting rod is connected with a middle connecting rod in a buckled mode, and the middle connecting rod is connected with an upper connecting rod in a buckled mode. The middle connecting rod is provided with a first limiting face used for limiting rotation of the lower connecting rod, an included angle is formed between the middle connecting rod and the U-shaped connecting rod and faces the first limiting face, one side of the middle connecting rod is provided with a jump pin, the jump pin is connected with a jump pin spring, and the middle of the jump pin is provided with a first driving part matched with the middle connecting rod. And the exterior of the jump pin is connected with a release through a limiting assembly. The tripping device has the advantage of being good in tripping effect.

Description

Technical Field

[0001] The invention relates to an RCCB type leakage protector, in particular to an RCCB type leakage tripping mechanism and the leakage protector. Background Art

[0002] Current residual current devices (RCCBs) are categorized as RCCBs and RCBOs. Differences in the materials, size, and placement of components within these two devices result in distinct actuator structures and tripping mechanisms. This requires manufacturers to design actuators tailored to the specific characteristics of RCCBs. However, the actuators of current RCCBs often exhibit 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 the present invention is to provide an RCCB type leakage tripping mechanism and a leakage protector, which have the characteristics of good tripping effect.

[0005] The technical solution of the present invention is as follows: an RCCB type leakage tripping mechanism, comprising a rotating member for connecting a moving contact, a reaction spring connected to the rotating member, a lower connecting rod rotatably connected to one side of the rotating member, the outer portion of the lower connecting rod being connected to a handle via a U-shaped connecting rod, the end portion of the lower connecting rod being buckled and connected to a middle connecting rod, a first limiting surface for rotationally limiting the lower connecting rod being provided on the middle connecting rod, an angle being formed between the middle connecting rod and the U-shaped connecting rod, and the direction of the angle being toward the first limiting surface, a jump buckle being provided on one side of the middle connecting rod, a jump buckle spring being connected to the jump buckle, a first driving portion cooperating with the middle connecting rod being provided in the middle portion of the jump buckle, and a tripper being connected to the outer portion of the jump buckle via a limiting assembly;

[0006] The middle connecting rod is used to limit the lower connecting rod through the first limiting surface when the switch is in the closed state, 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 squeezing force on the first driving part toward the middle connecting rod;

[0008] The limiting assembly is used to limit the tripping buckle in the closed state, so that the first driving part and the middle connecting rod are separated from each other, and to release the limit of the tripping buckle after the release is ejected;

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

[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 squeezing force on the middle connecting rod toward the lower connecting rod.

[0011] In the aforementioned RCCB type leakage tripping mechanism, a snap-fit 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 snap-fitting groove respectively. An angle is formed between the first limiting surface and the second limiting surface, and the second limiting surface is used to fit together with the lower connecting rod under the extrusion force of the middle connecting rod spring.

[0012] In the aforementioned RCCB type leakage tripping mechanism, the limit assembly includes a reset plate and a lock catch, one side of the reset plate is provided with a tripping surface that cooperates with the tripper, and the other side of the reset plate is provided with a second driving portion that cooperates with the lock catch; the lock catch is connected to a lock catch spring, and one side of the lock catch is provided with a third limit surface for limiting the tripping of the lock catch;

[0013] The reset plate is used to squeeze the lock buckle after the release is ejected;

[0014] The lock buckle is used to separate the third limiting surface and the jump buckle from each other after being squeezed by the lock buckle, thereby releasing the limit on the jump buckle;

[0015] The lock spring is used to drive the lock to reset after the reset plate is separated from the lock.

[0016] In the aforementioned RCCB type leakage tripping mechanism, a pressure plate cooperating with the tripping button is provided on one side of the rotating member, and the pressure plate is used to drive the tripping button to reset by squeezing after the gate is opened.

[0017] In the aforementioned RCCB type leakage tripping mechanism, a reset portion is provided on one side of the reset plate, a reset spring is provided on the outer side of the reset portion, and a third driving portion cooperating with the reset spring is provided on the handle;

[0018] The third driving part is used to squeeze and limit the reset spring when the switch is closed, so that the reset spring and the reset plate are separated from each other, and to release the squeeze and limit of the reset spring after the switch is opened;

[0019] The reset spring is used to drive the reset plate to reset by rebounding after the limit is released, and the reset plate drives the release to contract and reset after the reset plate is reset.

[0020] A leakage protector is also provided, which includes the aforementioned RCCB type leakage tripping mechanism.

[0021] The leakage protector includes a mounting shell, the rotating member is rotatably connected in the mounting shell and is connected to the mounting shell via a reaction spring, a moving contact is connected to the rotating member, and a static contact fixedly connected to the mounting shell is provided on one side of the moving contact, the middle connecting rod and the tripping buckle are coaxially rotatably connected in the mounting shell, and the tripping buckle and the mounting shell are connected to each other via a tripping buckle spring.

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

[0023] (1) The present invention forms a four-link structure in the closed state by coordinating the structures of the U-shaped link, the lower link, the middle link and the trip latch, and uses the cooperation of the middle link and the first limit surface to limit the lower link and the U-shaped link, so that the lower link cannot be pushed out toward the first limit surface under the action of the reaction spring, thereby ensuring the stability of the rotating part in the closed state; when the tripper is pushed out, the limit assembly releases the limit on the trip latch, so that the first driving part pushes the middle link under the action of the trip latch spring to separate it from the lower link, so that the lower link can continue to be pushed outward after losing the limit of the middle link, and at the same time, the rotating part can drive the moving contact to separate from the static contact under the action of the reaction spring after the limit is released, thereby realizing the opening action;

[0024] (2) By limiting the structure of the limit assembly, the lock can limit the trip latch when in the closed state, so that the middle connecting rod maintains a stable closed limit state; when the release is ejected, the reset plate can move accordingly and drive the lock 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 in this state, thereby ensuring the stability of the opening action of the rotating part; on this basis, through 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 completing the opening action, and the reset plate can drive the trip latch to retract and reset during the reset process, thereby improving the action stability of the present invention;

[0025] Therefore, the present invention has the characteristic of good tripping effect. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0030] Figure 5It is a schematic structural diagram of the present invention when the release is ejected.

[0031] The marks in the accompanying drawings are: 1-rotating part, 2-reaction spring, 3-lower connecting rod, 4-U-shaped connecting rod, 5-handle, 6-middle connecting rod, 7-trip buckle, 8-trip 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 shell, 200-moving contact, 300-static contact, 101-pressure plate, 501-third driving part, 601-first limiting surface, 602-locking groove, 603-second limiting surface, 701-first driving part, 111-tripping surface, 112-second driving part, 113-reset part, 121-third limiting surface. DETAILED DESCRIPTION

[0032] The present invention will be further described below with reference to the accompanying drawings and examples, but they are not intended to limit the present invention.

[0033] Example 1. An RCCB type leakage tripping mechanism, comprising: Figure 1-5 As shown, it includes a rotating member 1 for connecting the moving contact, a reaction spring 2 is connected to the rotating member 1, a lower connecting rod 3 is rotatably connected to one side of the rotating member 1, the outside of the lower connecting rod 3 is connected to the handle 5 via the U-shaped connecting rod 4, the lower connecting rod 3 and the U-shaped connecting rod 4 are plugged into each other and form a rotational connection, the end of the lower connecting rod 3 is buckled and connected to the middle connecting rod 6, the middle connecting rod 6 is provided with a first limiting surface 601 for rotationally limiting the lower connecting rod 3, an angle less than 180° is formed between the middle connecting rod 6 and the U-shaped connecting rod 4, and the direction of the angle is toward 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 the outside of the jump buckle 7 is connected to a release 9 via a limiting assembly;

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

[0035] The trip spring 8 is used to apply a squeezing force on the first driving part 701 toward the middle connecting rod 6;

[0036] The limiting assembly is used to limit the trip button 7 in the closed state, so that the first driving part 701 and the middle connecting rod 6 are separated from each other, and to release the limit of the trip button 7 after the release 9 is ejected;

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

[0038] The middle connecting rod 6 is connected to a middle connecting rod spring 10 , which is used to apply an extrusion force to the middle connecting rod 6 toward the lower connecting rod 3 so that the middle connecting rod 6 remains in a buckled state with the lower connecting rod 3 when it does not contact the jump buckle 7 .

[0039] A snap-fitting groove 602 is formed in the middle of the middle connecting rod 6, and a first limiting surface 601 and a second limiting surface 603 are respectively formed on both sides of the snap-fitting 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 together with the lower connecting rod 3 under the extrusion force of the middle connecting rod spring 10.

[0040] The limiting assembly includes a reset plate 11 and a lock 12. One side of the reset plate 11 is provided with a tripping surface 111 that cooperates with the release 9, and the other side of the reset plate 11 is provided with a second driving portion 112 that cooperates with the lock 12; the lock 12 is connected to a lock spring 13, and one side of the lock 12 is provided with a third limiting surface 121 for limiting the tripping buckle 7. The lock 12 on one side of the third limiting surface 121 is provided with an opening for the tripping buckle 7 to pass through;

[0041] The reset plate 11 is used to squeeze the lock 12 after the release 9 is ejected;

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

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

[0044] A pressure plate 101 cooperating with the trip buckle 7 is provided on one side of the rotating member 1. The pressure plate 101 is used to drive the trip buckle 7 to reset by squeezing after the gate is opened.

[0045] A reset portion 113 is provided on one side of the reset plate 11, a reset spring 14 is provided on the outer side of the reset portion 113, and a third driving portion 501 is provided on the handle 5 to cooperate with the reset spring 14;

[0046] The third driving part 501 is used to squeeze and limit the return spring 14 when the switch is closed, so that the return spring 14 and the return plate 11 are separated from each other, and to release the squeeze and limit of the return spring 14 after the switch is opened;

[0047] The reset spring 14 is used to drive the reset plate 11 to reset by rebounding after the limit is released, and the reset plate 11 drives the release 9 to contract and reset after being reset.

[0048] The working principle of the present invention is as follows: When the leakage trip mechanism is in the closed state, the handle 5 squeezes 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, so that the reset plate 11 is in a free floating state and is squeezed by the lock 12 and the lock spring 13 to fit with the tripper 9. At the same time, the tripping catch 7 is limited by the third limiting surface 121, causing the first driving part 701 and the middle connecting rod 6 to separate from each other, and the tripping catch spring 8 is in a contracted state. At this time, the reaction spring 2 is in a compressed state and applies an oblique upward squeezing force to the lower connecting rod 3. At the same time, 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 toward the first limiting surface 601 under the action of the reaction spring 2, and is locked and limited by the middle connecting rod 6 to maintain the closed state.

[0049] by Figure 2 Taking the installation positions of the various components as an example, when the tripper 9 is ejected, the reset plate 11 is subjected to a compressive force and rotates counterclockwise. This, in turn, drives the latch 12, via the second drive unit 112, to rotate clockwise, overcoming the elastic force of the latch spring 13. After the latch 12 rotates clockwise, the third limiting surface 121 separates from the trip latch 7, thereby releasing the restraint on the trip latch 7. This causes the trip latch 7 to rotate clockwise under the action of the trip latch spring 8. The first drive unit 701 applies an upward compressive force to the center link 6, causing it to separate from the lower link 3 under this pressure, thereby releasing the restraint on the rotating member 1. Once released from restraint, the rotating member 1 rotates counterclockwise under the action of the reaction spring 2, separating the moving contact 200 from the stationary contact 300. Simultaneously, the pressure plate 101 compresses the trip latch 7 as the rotating member 1 rotates, causing it to move counterclockwise and re-enter the trip latch 7, returning to its original position. When the handle 5 changes from the closing state to the opening state, the third driving part 501 releases the extrusion limit on the reset spring 14, so that the reset spring 14 drives the reset plate 11 to rotate clockwise through the reset part 113 after rebounding, thereby realizing the reset contraction of the release 9 and releasing the extrusion limit on the lock buckle 12, so that the lock buckle 12 returns to the limited position.

[0050] Similarly, when handle 5 is closed, U-shaped link 4 applies downward pressure to lower link 3 as handle 5 rotates, returning both to the closed position. During the movement of lower link 3, middle link 6, under the action of middle link spring 10, maintains contact with lower link 3. When lower link 3 reaches the closed position, first stop surface 601 reengages lower link 3, achieving the closed position.

[0051] Example 2. Leakage protector, composed as follows Figure 5As shown, the leakage protector includes a mounting shell 100, a moving contact 200 and a static contact 300. The outside of the moving contact 200 is connected to an RCCB type leakage tripping mechanism in Example 1; wherein the rotating member 1 is rotatably connected in the mounting shell 100 and is connected to the mounting shell 100 via a reaction spring 2, the moving contact 200 is connected to the rotating member 1, the static contact 300 is located on one side of the moving contact 200 and is fixedly connected to the mounting shell 100, the middle connecting rod 6 and the tripping buckle 7 are coaxially rotatably connected in the mounting shell 100, the middle connecting rod 6 and the mounting shell 100 are mutually connected via a middle connecting rod spring 10, and the tripping buckle 7 and the mounting shell 100 are mutually connected via a tripping buckle spring 8.

[0052] The reset plate 11 is rotatably connected in the mounting shell 100 and is connected to the mounting shell 100 via a reset spring 14 . The lock catch 12 is rotatably connected in the mounting shell 100 and is connected to the mounting shell 100 via a lock catch spring 13 .

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

Claims

1. An RCCB type leakage tripping mechanism, characterized by: The invention comprises a rotating member (1) for connecting a moving contact, wherein a reaction spring (2) is connected to the rotating member (1), a lower connecting rod (3) is rotatably connected to one side of the rotating member (1), the outer portion of the lower connecting rod (3) is connected to a handle (5) via a U-shaped connecting rod (4), the end portion of the lower connecting rod (3) is buckled and connected to a middle connecting rod (6), a first limiting surface (601) for rotationally limiting the lower connecting rod (3) is provided 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 direction of the angle is toward 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) cooperating with the middle connecting rod (6) is provided in the middle of the jump buckle (7), and a tripper (9) is connected to the outer portion of the jump buckle (7) via a limiting assembly; The middle connecting rod (6) is used to limit the lower connecting rod (3) through the first limiting surface (601) in the closed state, 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 squeezing force to the first driving part (701) in the direction of the middle connecting rod (6); The limiting assembly is used to limit the tripping latch (7) in a closed state, so that the first driving part (701) and the middle connecting rod (6) are separated from each other, and to release the limiting of the tripping latch (7) after the release (9) is ejected; The jump button (7) is used to press the middle connecting rod (6) through the first driving part (701) under the elastic force of the jump button 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: The middle connecting rod (6) is connected to a middle connecting rod spring (10), and the middle connecting rod spring (10) is used to apply an extrusion force to the middle connecting rod (6) toward the lower connecting rod (3).

3. The RCCB type leakage tripping mechanism according to claim 2, characterized in that: A buckling groove (602) is formed in the middle of the middle connecting rod (6), and a first limiting surface (601) and a second limiting surface (603) are formed on both sides of the buckling groove (602), respectively. An angle is formed between the first limiting surface (601) and the second limiting surface (603), and the second limiting surface (603) is used to fit together with the lower connecting rod (3) under the extrusion 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 comprises a reset plate (11) and a lock catch (12); one side of the reset plate (11) is provided with a tripping surface (111) that cooperates with the tripper (9); the other side of the reset plate (11) is provided with a second driving portion (112) that cooperates with the lock catch (12); a lock catch spring (13) is connected to the lock catch (12); one side of the lock catch (12) is provided with a third limiting surface (121) for limiting the tripping catch (7); The reset plate (11) is used to squeeze the lock catch (12) after the release (9) is ejected; The lock buckle (12) is used to separate the third limiting surface (121) and the jump buckle (7) from each other after being squeezed by the lock buckle (12), thereby releasing the limiting of the jump buckle (7); The lock catch spring (13) is used to drive the lock catch (12) to reset after the reset plate (11) is separated from the lock catch (12).

5. The RCCB type leakage tripping mechanism according to claim 4, characterized in that: A pressure plate (101) cooperating with the trip buckle (7) is provided on one side of the rotating member (1). The pressure plate (101) is used to drive the trip 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: A reset portion (113) is provided on one side of the reset plate (11), a reset spring (14) is provided on the outer side of the reset portion (113), and a third driving portion (501) that cooperates with the reset spring (14) is provided on the handle (5); The third driving part (501) is used to squeeze and limit the reset spring (14) when the switch 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 switch is opened; The reset spring (14) is used to drive the reset plate (11) to reset by rebounding after the limit is released, and the reset plate (11) drives the release (9) to contract and reset after the reset.

7. Leakage protector, characterized by: The leakage protector comprises an RCCB type leakage tripping mechanism as described in any one of claims 1 to 6.

8. The leakage protector according to claim 7, characterized in that: The invention comprises a mounting shell (100), wherein the rotating member (1) is rotatably connected in the mounting shell (100) and is connected to the mounting shell (100) via a reaction spring (2), a moving contact (200) is connected to the rotating member (1), and a static contact (300) fixedly connected to the mounting shell (100) is provided on one side of the moving contact (200), the middle connecting rod (6) and the jump button (7) are coaxially rotatably connected in the mounting shell (100), and the jump button (7) and the mounting shell (100) are connected to each other via a jump button spring (8).

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