Electromagnetic leakage protection mechanism for circuit breaker
By introducing structures such as jumpers, tripping parts and handle reset parts into the circuit breaker, the problems of complex structure and poor trip stability of the existing electromagnetic leakage protector are solved, and the structure simplification and trip stability of the circuit breaker are achieved. promote.
Patent Information
- Application Number
- CN202420271224.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-04
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-02-04
AI Technical Summary
The existing electromagnetic leakage protectors have complex structure and poor trip stability, which leads to the need for multiple parts to achieve functions, and are prone to stagnation during the reset process.
By introducing structures such as jumping, tripping and handle resetting parts into the circuit breaker, and using elastic parts and guide surfaces, the electromagnetic tripping device can drive the tripping parts to rotate after ejection, and release the buckle limit of jumping buckles , so that it rotates under the action of the elastic member, drives the actuator to realize the gate opening action, and avoids stagnation through the reset structure.
The structure of the circuit breaker is simplified, the structural complexity and space occupied are reduced, the trip stability is improved, and the problem of stuck in the electromagnetic tripper caused by too little thrust during the initial ejection is avoided.
Smart Images
Figure CN222507506U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a circuit breaker, in particular to an electromagnetic leakage protection mechanism for the circuit breaker. Background Art
[0002] The existing electromagnetic leakage protector is an electromagnetic release for detecting leakage problems added to the circuit breaker. When leakage occurs in the external circuit, the electromagnetic release pushes out and drives the actuator in the circuit breaker to operate, thereby realizing the leakage opening function of the circuit breaker. Compared with the electronic release, the electromagnetic release can only reach 1-2N in thrust after being triggered, that is, it cannot overcome the elastic force of the reaction spring to directly trigger the actuator to operate. As a result, the manufacturer needs to add a leakage protection mechanism on the basis of the actuator, and then the electromagnetic release first applies thrust to the leakage protection mechanism after being triggered, and then the leakage protection mechanism applies a greater triggering force to the actuator after being acted upon, thereby triggering the actuator to open the gate. At the same time, when the circuit breaker is opened or subsequently closed, the leakage protection mechanism also needs to be reset with the cooperation of the actuator and the circuit breaker handle to ensure the subsequent triggering effect of the electromagnetic release.
[0003] Under the above functional limitations, the existing leakage protection mechanism generally requires the cooperation of 5-6 parts to achieve the above functions, which greatly increases the structural complexity of the circuit breaker and causes a large amount of internal space of the circuit breaker to be occupied, that is, the overall size of the circuit breaker is increased. On the other hand, since the ejector of the electromagnetic release cannot return to the retracted state by itself after being extended, the leakage protection mechanism needs to drive the ejector to retract into the electromagnetic release during the resetting process; this makes the existing leakage protection mechanism apply an inward squeezing force to the ejector during the resetting process in order to complete the retraction action, and causes the leakage protection mechanism to fit with the ejector in the retracted state after the resetting action is completed. However, the defect of this method is that when the connecting part and the ejecting part are in a state of mutual contact, even if the connecting part is not restricted by the outside and is in a free rotation state at this time, the electromagnetic releaser needs to overcome the sliding friction between the connecting part and the circuit breaker housing before it can drive the connecting part to rotate; as a result, the ejecting part is easily affected by the sliding friction and becomes stuck during ejection, and cannot complete the ejection action and trigger the leakage protection mechanism, thereby affecting the tripping stability of the leakage protector.
[0004] Therefore, the existing leakage protector has the problems of complex structure and poor tripping stability. Utility Model Content
[0005] The purpose of the utility model is to provide an electromagnetic leakage protection mechanism for a circuit breaker, which has the characteristics of simple structure and good tripping stability.
[0006] The technical solution of the utility model is: an electromagnetic leakage protection mechanism for a circuit breaker, comprising a trip button located in a circuit breaker housing, a first elastic member connected between the trip button and the circuit breaker housing, a first driving part for triggering an actuator is provided at one end of the trip button, a tripping member is buckled and connected to the outside of the trip button, and an electromagnetic release is provided on one side of the tripping member;
[0007] When in use, the electromagnetic release pushes the tripping member after being triggered, so that the tripping member releases the locking limit on the tripping buckle after being rotated by the pushing. After the tripping buckle loses the limit, it rotates under the action of the first elastic member, and drives the first driving part to apply a tripping force to the actuator, so that the actuator drives the circuit breaker to complete the opening action after being subjected to the force.
[0008] The aforementioned electromagnetic leakage protection mechanism for a circuit breaker further comprises a handle reset member rotatably connected to the circuit breaker housing, a third elastic member is connected between the handle reset member and the circuit breaker housing, a reset portion cooperating with a trip button is provided on one side of the handle reset member, a slide groove is provided on the other side of the handle reset member, and a pressure block connected to the circuit breaker handle is provided on one side of the slide groove;
[0009] When the circuit breaker is opened, the circuit breaker handle rotates to the opening position and drives the pressure block to buckle into the slide groove of the handle reset member. During the rotation and buckling process, the pressure block drives the handle reset member to rotate to overcome the elastic force of the third elastic member, and after the handle reset member rotates, the reset part applies a squeezing force to the trip button, so that the trip button is reset under pressure;
[0010] When the circuit breaker is closed, the circuit breaker handle rotates to the closing position and separates the pressure block and the handle reset member from each other, thereby releasing the limit on the handle reset member. After the limit is released, the handle reset member is reset to a state separated from the trip button by the rebound force of the third elastic member, thereby releasing the limit on the trip button.
[0011] In the aforementioned electromagnetic leakage protection mechanism for a circuit breaker, the tripping member is connected to a second elastic member, and the outside of the second elastic member is connected to an actuator;
[0012] When the circuit breaker is opened, the actuator operates and applies a squeezing force to the second elastic member, so that the second elastic member drives the release member to rotate and reset after being pressed, and the release member squeezes the electromagnetic release after being pressed and reset, so that the electromagnetic release returns to the contracted state;
[0013] When the circuit breaker is closed, the circuit breaker handle rotates to the closed position and drives the actuator to reset, so that the actuator is separated from the second elastic member during the resetting process, thereby releasing the limit on the tripping member.
[0014] In the aforementioned electromagnetic leakage protection mechanism for a circuit breaker, the tripping member is provided with a buckling surface for buckling and connecting the jumper, and the tripping member inside the buckling surface is provided with a guide surface for matching the jumper;
[0015] When the actuator resets the trip latch during the opening process, the trip latch rotates to the side of the guide surface away from the locking surface under the resetting action. When the circuit breaker is closed, the trip latch loses the limit of the actuator and rotates toward the locking surface under the rebound action of the first elastic member. During the rotation, an extrusion force is applied to the release member through the guide surface, so that the release member rotates to separate from the electromagnetic releaser under the extrusion action of the trip latch.
[0016] Compared with the prior art, the utility model has the following characteristics:
[0017] (1) The utility model uses the structural coordination of the trip button and the release member so that the electromagnetic release can drive the release member to rotate and release the locking limit of the trip button after being ejected, so that the trip button can rotate and release under the action of the first elastic member to drive the actuator to realize the gate opening action; on this basis, through the structural coordination of the handle reset member and the pressure block, the handle can apply a downward extrusion force to the trip button through the pressure block after the gate is opened, thereby driving the trip button to realize the reset action, and through the coordination of the actuator and the second elastic member, the actuator can drive the release member to rotate and reset through the second elastic member after the gate is opened, thereby realizing the reset action of the release member; and under the above coordination, the utility model only needs to add three parts, namely, the trip button, the release member and the handle reset member, on the basis of the existing circuit breaker to realize its transmission and reset functions, which effectively reduces its structural complexity and occupied space compared with the existing transmission mechanism, and reduces the overall size of the circuit breaker;
[0018] (2) By limiting the reset structure of the trip button and the release member, and the buckling surface and the guide surface provided on the release member, the trip button can be in an over-contracted state under the extrusion limit of the handle reset member and be located on the side of the guide surface away from the buckling surface, so that when the circuit breaker is closed, the trip button can drive the release member to rotate through the guide surface under the rebound action of the first elastic member, so that when the trip button rotates to be in a state of mutual contact with the buckling surface, the release member can rotate accordingly to be in a state of mutual separation from the electromagnetic release, that is, leaving an empty stroke for the electromagnetic release to be ejected smoothly; and in this state, the electromagnetic release does not need to overcome the sliding friction between the release member and the circuit breaker housing after being triggered, and contacts the release member when ejected to the middle position to achieve the triggering effect, that is, effectively eliminating the jamming problem of the electromagnetic release caused by too small a thrust during the initial ejection, thereby improving the tripping stability of the circuit breaker;
[0019] Therefore, the utility model has the characteristics of simple structure and good tripping stability. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1 It is an exploded view of the utility model;
[0021] Figure 2It is a schematic diagram of the structure of the utility model when the gate is opened;
[0022] Figure 3 yes Figure 2 A-direction enlarged view;
[0023] Figure 4 It is a schematic diagram of the structure of the utility model in the closed state;
[0024] Figure 5 It is a structural schematic diagram of the utility model after the electromagnetic release is ejected.
[0025] Figure 6 It is a connection structure diagram of the second elastic member and the actuator.
[0026] The markings in the accompanying drawings are: 1-circuit breaker housing, 2-trip latch, 3-first elastic member, 4-actuator, 5-trip member, 6-electromagnetic release, 7-handle reset member, 8-third elastic member, 9-pressure block, 10-second elastic member, 201-first driving part, 501-fastening surface, 502-guide surface, 701-reset part, 702-slide groove. DETAILED DESCRIPTION
[0027] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.
[0028] Embodiment. An electromagnetic leakage protection mechanism for a circuit breaker, comprising: Figure 1 As shown, it includes a trip button 2 located in a circuit breaker housing 1, a first elastic member 3 is connected between the trip button 2 and the circuit breaker housing 1, one end of the trip button 2 is provided with a first driving part 201 for triggering an actuator 4, the outside of the trip button 2 is buckled and connected with a release member 5, one side of the release member 5 is provided with an electromagnetic release 6, and the first elastic member 3 is used to apply an extrusion force to the trip button 2 to separate from the release member 5; the actuator 4 is a conventional actuator for realizing the opening and closing actions of the circuit breaker, the number of the actuators 4 is two and they are arranged side by side on the left and right sides of the electromagnetic release 6, and the outside of the actuator 4 is connected to the circuit breaker handle;
[0029] When a leakage problem occurs, the electromagnetic release 6 pushes the tripping member 5 after being triggered, so that the tripping member 5 releases the buckling limit of the tripping buckle 2 after being rotated by the push. After the tripping buckle 2 loses the limit, it rotates under the action of the first elastic member 3, and drives the first driving part 201 to apply a tripping force to the actuator 4, so that the actuator 4 drives the circuit breaker to complete the opening action after being subjected to the force. In this state, the connection structure between the tripping buckle 2 and the tripping member 5 is as shown in FIG. Figure 5 As shown; the actuator 4 drives the trip button 2 and the release member 5 to reset during the gate opening process, and the connection structure of the trip button 2 and the release member 5 after the gate opening reset is as shown Figure 2 shown.
[0030] It also includes a handle reset member 7 rotatably connected to the circuit breaker housing 1, a third elastic member 8 is connected between the handle reset member 7 and the circuit breaker housing 1, a reset portion 701 matching the trip button 2 is provided on one side of the handle reset member 7, a slide groove 702 is provided on the other side of the handle reset member 7, and a pressure block 9 connected to the circuit breaker handle is provided on one side of the slide groove 702;
[0031] When the circuit breaker is opened, the circuit breaker handle rotates to the opening position and drives the pressure block 9 to buckle into the slide groove 702 of the handle reset member 7. The pressure block 9 drives the handle reset member 7 to rotate to overcome the elastic force of the third elastic member 8 during the rotation and buckling process, and the handle reset member 7 applies a squeezing force to the trip button 2 through the reset portion 701 after rotation, so that the trip button 2 returns to the buckling position with the tripping member 5 after being pressed;
[0032] When the circuit breaker is closed, the circuit breaker handle rotates to the closing position and separates the pressure block 9 and the handle reset member 7 from each other, thereby releasing the limit on the handle reset member 7. After the limit is released, the handle reset member 7 is reset to a state separated from the trip button 2 by the rebound force of the third elastic member 8, thereby releasing the limit on the trip button 2; the connection structure of the trip button 2 and the tripping member 5 in the initial buckled state is as shown in FIG. Figure 4 shown.
[0033] The release member 5 is connected to a second elastic member 10, and the second elastic member 10 is externally connected to the actuator 4 away from the side of the pressure block 9;
[0034] When the circuit breaker is opened, the actuator 4 operates and applies a squeezing force to the second elastic member 10, so that the second elastic member 10 drives the tripping member 5 to rotate and reset to the engaging position with the tripping member 2 after being pressed, and the tripping member 5 squeezes the electromagnetic release 6 after being pressed and reset to restore the electromagnetic release 6 to the contracted state;
[0035] When the circuit breaker is closed, the circuit breaker handle rotates to the closed position and drives the actuator 4 to reset, so that the actuator 4 is separated from the second elastic member 10 during the resetting process, thereby releasing the limit on the tripping member 5. In this state, the second elastic member 10 is in a natural state and the tripping member 5 has a free rotation stroke of a certain angle.
[0036] The release member 5 is provided with a buckling surface 501 for buckling and connecting the jump buckle 2. The jump buckle 2 is in contact with the buckling surface 501 in the buckled state. The release member 5 inside the buckling surface 501 is provided with a guide surface 502 for matching the jump buckle 2.
[0037] When the actuator 4 resets the trip button 2 during the opening process, the trip button 2 rotates to the side of the guide surface 502 away from the locking surface 501 under the resetting action. When the circuit breaker is closed, the trip button 2 loses the limit of the actuator 4 and rotates toward the locking surface 501 under the rebound action of the first elastic member 3. During the rotation, an extrusion force is applied to the release member 5 through the guide surface 502, so that the release member 5 rotates to separate from the electromagnetic release 6 under the extrusion of the trip button 2. When the trip button 2 rotates to fit the locking surface 501, a certain spacing distance is formed between the trip button 5 and the ejection member of the electromagnetic release 6, thereby ensuring the smooth ejection of the electromagnetic release 6.
[0038] The working principle of the utility model is as follows: when there is a leakage problem in the external circuit, the electromagnetic release 6 pushes the release member 5 after detection, so that the release member 5 releases the locking limit of the trip button 2 after rotation. After the trip button 2 is tripped, it rotates counterclockwise under the action of the first elastic member 3 (the rotation direction is Figure 4 The first driving part 201 triggers the actuator 4 after rotation, so that the circuit breaker is opened through the actuator 4.
[0039] After the actuator 4 is actuated, the circuit breaker handle rotates counterclockwise to the opening state, and the pressure block 9 slides out of the slide slot 702 as it rotates, that is, the limit on the handle reset member 7 is released. After the limit is released, the handle reset member 7 rotates clockwise under the action of the third elastic member 8, and applies a downward squeezing force to the tripping buckle 2 in the tripping state through the reset portion 701, so that the tripping buckle 2 rebounds to a fully retracted state after being compressed. At the same time, the contact seat on the actuator 4 rotates clockwise during the circuit breaker opening process, and contacts the second elastic member 10 during the rotation process and squeezes it, so that the second elastic member 10 drives the tripping member 5 to rotate counterclockwise after being compressed, and the tripping member 5 retracts the ejector of the electromagnetic release 6 after rotating.
[0040] When the circuit breaker is fully opened, the tripper 2 and the release member 5 are both in a fully retracted state, so that the tripper 2 is located below the engagement surface 501 and fits with the guide surface 502 in this state, and the release member 5 fits with the ejector in the retracted state. When the external personnel control the circuit breaker handle to close, the pressure block 9 is re-entered into the slide groove 702 and drives the handle reset member 7 to rotate clockwise, thereby releasing the limit of the tripper 2, so that the tripper 2 rotates counterclockwise under the rebound action of the first elastic member 3. At the same time, the closing action of the circuit breaker handle drives the actuator 4 to reset, so that the contact seat rotates counterclockwise until it is separated from the second elastic member 10, that is, it contacts the limit of the release member 5, so that the release member 5 is in a free rotation state. In this state, the tripper 2 will rotate along the guide surface 502 toward the engagement surface 501, and apply a squeezing force to the release member 5 through the guide surface 502 during the rotation process, so that the release member 5 rotates clockwise after being pressed. When the jumper 2 rotates to fit the engagement surface 501, the jumper 2 and the release member 5 both return to the initial engagement state, and the release member 5 is separated from the ejector of the electromagnetic release 6 after rotation, thereby leaving space for the ejector to be ejected freely, effectively avoiding the problem of the ejector being stuck.
Claims
1. An electromagnetic leakage protection mechanism for a circuit breaker, characterized in that: The invention comprises a trip button (2) located in a circuit breaker housing (1), a first elastic member (3) being connected between the trip button (2) and the circuit breaker housing (1), a first driving part (201) for triggering an actuator (4) being provided at one end of the trip button (2), a release member (5) being buckled and connected to the outside of the trip button (2), and an electromagnetic release (6) being provided at one side of the release member (5); When in use, the electromagnetic release (6) pushes the release member (5) after being triggered, so that the release member (5) releases the locking limit on the trip button (2) after being rotated by the push, and the trip button (2) rotates under the action of the first elastic member (3) after losing the limit, and drives the first driving part (201) to apply a tripping force to the actuator (4), so that the actuator (4) drives the circuit breaker to complete the opening action after being subjected to the force.
2. The electromagnetic leakage protection mechanism for a circuit breaker according to claim 1, characterized in that: It also comprises a handle reset member (7) rotatably connected to the circuit breaker housing (1), a third elastic member (8) being connected between the handle reset member (7) and the circuit breaker housing (1), a reset portion (701) cooperating with the trip button (2) being provided on one side of the handle reset member (7), a slide groove (702) being provided on the other side of the handle reset member (7), and a pressure block (9) connected to the circuit breaker handle being provided on one side of the slide groove (702); When the circuit breaker is opened, the circuit breaker handle rotates to the opening position and drives the pressure block (9) to buckle into the slide groove (702) of the handle reset member (7). During the rotation and buckling process, the pressure block (9) drives the handle reset member (7) to rotate by overcoming the elastic force of the third elastic member (8), and after the handle reset member (7) rotates, it applies a squeezing force to the trip button (2) through the reset portion (701), so that the trip button (2) is reset under pressure; When the circuit breaker is closed, the circuit breaker handle rotates to the closed position and causes the pressure block (9) and the handle reset member (7) to separate from each other, thereby releasing the limit on the handle reset member (7). After the limit is released, the handle reset member (7) is reset to a state separated from the trip button (2) by the rebound force of the third elastic member (8), thereby releasing the limit on the trip button (2).
3. The electromagnetic leakage protection mechanism for circuit breaker according to claim 1, characterized in that: The release member (5) is connected to a second elastic member (10), and the outside of the second elastic member (10) is connected to an actuator (4); When the circuit breaker is opened, the actuator (4) is activated and applies a squeezing force to the second elastic member (10), so that the second elastic member (10) drives the release member (5) to rotate and reset after being pressed, and the release member (5) squeezes the electromagnetic release (6) after being pressed and reset, so that the electromagnetic release (6) returns to a contracted state; When the circuit breaker is closed, the circuit breaker handle rotates to the closed position and drives the actuator (4) to reset, so that the actuator (4) is separated from the second elastic member (10) during the resetting process, thereby releasing the limit on the tripping member (5).
4. The electromagnetic leakage protection mechanism for a circuit breaker according to claim 1, characterized in that: The release member (5) is provided with a buckling surface (501) for buckling and connecting with the jump buckle (2), and the release member (5) inside the buckling surface (501) is provided with a guide surface (502) for matching with the jump buckle (2); When the actuator (4) resets the trip button (2) during the opening process, the trip button (2) rotates to the side of the guide surface (502) away from the buckling surface (501) under the resetting action. When the circuit breaker is closed, the trip button (2) loses the limit of the actuator (4) and rotates towards the buckling surface (501) under the rebound action of the first elastic member (3). During the rotation process, the trip button (2) applies a squeezing force to the release member (5) through the guide surface (502), so that the release member (5) rotates to separate from the electromagnetic release (6) under the squeezing action of the trip button (2).