A lock trip device for an automatic transfer switching apparatus

Abstract

The utility model relates to the technical field of switch disengaging, especially to a lock disengaging device of automatic transfer switch, which mainly aims at the problem that the common lock disengaging device of automatic transfer switch is damaged by the impact force generated in the process of reset touch due to the hard contact between the two contact pieces, and the subsequent power-on is affected, and proposes the following technical scheme: a shell is provided with a connecting rod and a linkage in the shell, a knob is arranged at the top gap of the shell, a first rotating hole and a second rotating hole are arranged on the linkage, an electromagnet is hinged at the first rotating hole, a vertical plate is installed on the inner wall of the shell, and a touch assembly is installed on the side wall of the vertical plate. The utility model realizes the buffering when the power-on structure touches, reduces the damage caused by the impact force in the touch process, prevents the subsequent poor contact, and affects the power-on.

Description

Technical Field

[0001] This utility model relates to the field of switchgear tripping technology, and in particular to a locking and tripping device for an automatic switching switchgear. Background Technology

[0002] An automatic transfer switch is an electrical device used to monitor the status of a power circuit and automatically switch the load to a backup power source when the main power supply fails. It functions in monitoring and control devices to detect power status (such as undervoltage, overvoltage, low voltage, phase loss, etc.) and control the switching action. When the power supply voltage is lower or higher than the normal range, the undervoltage or overvoltage trip unit will trigger to disconnect. This is typically achieved through the pushing and pulling of an electromagnet, which automatically resets and disconnects the switch. The linkage structure, under the action of the electromagnet's output, can move the movable contact, releasing it from contact with the contacts fixed inside the switch.

[0003] However, the locking and tripping device of common automatic transfer switchgear has a hard contact between the two contacts, which causes the impact force generated during the reset contact process to damage the contact surface of the two contacts and affect the subsequent power supply. In view of this, we propose a locking and tripping device for automatic transfer switchgear. Utility Model Content

[0004] The purpose of this invention is to address the problems existing in the background technology by proposing a locking and releasing device for an automatic switching electrical appliance.

[0005] The technical solution of this utility model: A locking and releasing device for an automatic transfer switch includes a housing, a connecting rod and a linkage component inside the housing, a toggle component at the top notch of the housing, a first rotating hole and a second rotating hole on the linkage component, an electromagnet hinged at the first rotating hole, a vertical plate installed on the inner wall of the housing, a touch assembly installed on the side wall of the vertical plate, the touch assembly including a movable contact piece, hinge seats and limiting sliders symmetrically installed on the top and bottom walls of the movable contact piece, a collar sleeved on the outer surface wall of the movable contact piece, a connecting ring connected to the side wall of the collar, a first insulating ring installed on the end face of the connecting ring, a stationary contact piece also installed on the inner wall of the housing, a protective assembly provided outside the stationary contact piece, the protective assembly including a second protective sleeve, a spring installed inside the second protective sleeve, a movable rod connected to the top of a plurality of springs, and a second insulating ring connected to the end of the movable rod.

[0006] Preferably, the actuating component has a third rotating hole, through which a first rotating shaft passes, and the two ends of the first rotating shaft are connected to the opening wall at the top of the outer casing.

[0007] Preferably, the actuating component has a fourth rotating hole, the linkage component has a fifth rotating hole, a first rotating hole and a second rotating hole, the connecting rod is arranged in a U-shape, and the transverse shaft structure of the connecting rod is arranged in the fourth rotating hole and the fifth rotating hole.

[0008] Preferably, an I-shaped rod is inserted into the first rotating hole, and the end of the I-shaped rod is connected to the output end of the electromagnet.

[0009] Preferably, a first protective sleeve is fitted onto the movable contact piece, a slide rail is provided on the top wall of the first protective sleeve, the hinge seat is disposed in the slide rail, and the shaft structure of the hinge seat is disposed in the second rotating hole.

[0010] Preferably, a first protective sleeve is fitted onto the movable contact piece, and a wire is disposed inside the first protective sleeve, the end of which is connected to the bottom wall of the movable contact piece.

[0011] Preferably, the second protective sleeve has a movable cavity, and the anti-detachment end of the movable rod is disposed in the movable cavity, wherein the diameter of the anti-detachment end of the movable rod is larger than the diameter of the opening of the movable cavity.

[0012] Compared with the prior art, the present invention has the following beneficial technical effects:

[0013] This invention uses an electromagnet hinged to a first rotating hole on a linkage component, which can pull the linkage component to rotate. Furthermore, the hinged connection between the hinge seat and the second rotating hole on the linkage component allows the movable contact piece to move. Simultaneously, the contact between the collar, connecting ring, and first insulating ring pushes the second insulating ring to retract. In its retracted state, the second insulating ring, buffered by the spring and movable rod, protects the movable and stationary contact pieces during contact, reducing damage to their contact surfaces caused by impact during resetting and energizing, thus mitigating subsequent poor contact and hindering energization. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of a latching and tripping device for an automatic switching electrical appliance;

[0015] Figure 2 yes Figure 1 A schematic diagram of the frontal cross-sectional structure;

[0016] Figure 3 yes Figure 2 A cross-sectional view of the internal structure of the touch component.

[0017] Reference numerals: 1. Outer shell; 2. Actuating element; 3. Connecting rod; 4. Linking element; 5. Contact assembly; 51. Movable contact piece; 52. Hinge seat; 53. Limiting slider; 54. Collar; 55. Connecting ring; 56. First insulating ring; 57. First protective sleeve; 58. Wire; 6. Stationary contact piece; 7. Protective assembly; 71. Second protective sleeve; 72. Spring; 73. Movable rod; 74. Second insulating ring; 8. First rotating shaft; 9. First abutment; 10. Second abutment; 11. Electromagnet; 12. Vertical plate. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0019] Example

[0020] like Figures 1 to 3 As shown, this utility model proposes a locking and releasing device for an automatic transfer switch, comprising a housing 1, an actuating element 2, a connecting rod 3, and a linkage element 4. Part of the actuating element 2 is disposed in the top opening of the housing 1. Both ends of a first rotating shaft 8 are connected to the top of the inner wall of the housing 1. The first rotating shaft 8 is also disposed in a third rotating hole within the actuating element 2 to assist in its rotation. The connecting rod 3 is U-shaped, and its transverse shaft structure is disposed in the fourth and fifth rotating holes on the actuating element 2 and the linkage element 4, facilitating the movement of the linkage element 4 by using the connecting rod 3 during the rotation of the actuating element 2. An electromagnet 11 is fixedly mounted... An I-shaped rod is inserted into the first rotating hole on the linkage 4, which is mounted on the inner wall of the outer casing 1. An auxiliary hole is provided on the output end of the electromagnet 11, and part of the shaft of the I-shaped rod is set in the auxiliary hole. This facilitates the linkage 4 to move under the drive of the electromagnet 11, which is conducive to automatic power-off and improves the safety of the electrical system in case of overload and short circuit. The first abutment 9 is fixedly installed on the inner wall of the outer casing 1 and is located on the wall facing the linkage 4. The second abutment 10 is fixedly installed on the wall facing the linkage 4. This facilitates the linkage 4 to block and limit movement under the abutment action of the first abutment 9 and the second abutment 10.

[0021] Furthermore, the vertical plate 12 is fixedly installed on the inner wall of the outer casing 1, and the touch assembly 5 is installed on the side wall of the vertical plate 12. The touch assembly 5 includes a movable contact piece 51, a hinge seat 52, a limiting slider 53, a collar 54, a connecting ring 55, a first insulating ring 56, a first protective sleeve 57, and a wire 58. The first protective sleeve 57 is fixedly installed on the side wall of the vertical plate 12. The movable contact piece 51 is disposed inside the first protective sleeve 57. The bottom wall of the hinge seat 52 is inserted into the slide rail opened on the top wall of the first protective sleeve 57 and is fixedly connected to the top wall of the movable contact piece 51. The transverse shaft structure of the hinge seat 52 is hinged to the second rotating hole opened on the linkage 4, so that the movable contact piece 51 can be pulled to move in conjunction with the hinge seat 52 during the rotation of the linkage 4, which facilitates power-off protection. The wire 58 is disposed inside the first protective sleeve 57, and the two ends of the wire 58 are connected to the power-conducting structure inside the outer casing 1 and the end of the movable contact piece 51.

[0022] The limiting slider 53 is fixedly installed on the bottom wall of the movable contact piece 51. A limiting groove is opened at the bottom of the inner wall of the first protective sleeve 57. The limiting slider 53 is embedded in the limiting groove and fixedly installed on the bottom wall of the movable contact piece 51. While assisting the movement of the movable contact piece 51, it helps to prevent the movable contact piece 51 from falling off the first protective sleeve 57, which would affect subsequent use and reset. The collar 54 is fixedly sleeved on the outer surface wall of the movable contact piece 51. The first insulating ring 56 is located on one side of the first protective sleeve 57. The connecting ring 55 is set on the opposite wall of the collar 54 and the first insulating ring 56. The two side walls of the connecting ring 55 are fixedly connected to the opposite wall of the two, which facilitates protection when the movable contact piece 51 is in contact with the power supply.

[0023] Furthermore, the protective component 7 and the stationary contact 6 are both installed on the same inner wall of the outer casing 1. The stationary contact 6 is disposed inside the protective component 7. The protective component 7 includes a second protective sleeve 71, springs 72, movable rods 73, and a second insulating ring 74. The second protective sleeve 71 is fixedly installed on the inner wall of the outer casing 1. The stationary contact 6 is placed inside the second protective sleeve 71. Multiple springs 72 are respectively disposed in multiple movable cavities opened inside the second protective sleeve 71, and one end of the springs 72 is connected to the cavity wall of the movable cavity. The multiple movable rods 73 are all T-shaped. The anti-detachment ends of multiple movable rods 73 are respectively inserted into the movable cavities corresponding to their positions, and the ends of the anti-detachment ends of the movable rods 73 are also connected to the other end of the corresponding springs 72. The springs 72 assist the movable rods 73 in their movement. At the same time, the diameter of the anti-detachment ends of the movable rods 73 is larger than the diameter of the opening of the movable cavity, preventing the movable rods 73 from detaching from the second protective sleeve 71 during the movement, which would affect subsequent use. The wall of the second insulating ring 74 facing the movable rod 73 is fixedly connected to its end, and works with the springs 72 to buffer the contact of the stationary contact piece 6 during the contact process.

[0024] In this embodiment, when an overload occurs, the electromagnet 11 drives the linkage 4 to rotate, causing the linkage 4 to rotate. This, in conjunction with the hinge seat 52, causes the movable contact 51 to disengage from the stationary contact 6, achieving automatic power-off protection. When the movable contact 51 needs to contact the stationary contact 6 for energization, the electromagnet 11 pulls the linkage 4 to rotate, causing the linkage 4, in conjunction with the hinge seat 52, to move the movable contact 51 toward the stationary contact 6, making contact between them. During this contact process, the first insulating ring 56 compresses the second insulating ring 74, causing the second insulating ring 74 to contract under the push of the first insulating ring 56 and the guidance of the spring 72 and the movable rod 73. This buffers the contact before the movable contact 51 and the stationary contact 6 touch, preventing direct collision and impact that could damage and wear the contact surface, affecting subsequent energization and causing poor contact.

[0025] The above specific embodiments are merely several preferred embodiments of this utility model. Based on the technical solution of this utility model and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A locking and releasing device for an automatic transfer switch, comprising a housing (1), wherein a connecting rod (3) and a linkage member (4) are provided inside the housing (1), and a toggle member (2) is provided at a notch at the top of the housing (1), characterized in that: The linkage component (4) has a first rotating hole and a second rotating hole. An electromagnet (11) is hinged at the first rotating hole. A vertical plate (12) is installed on the inner wall of the outer shell (1). A touch component (5) is installed on the side wall of the vertical plate (12). The touch component (5) includes a movable contact piece (51). A hinge seat (52) and a limiting slider (53) are symmetrically installed on the top and bottom walls of the movable contact piece (51). A collar (54) is sleeved on the outer surface wall of the movable contact piece (51). A connecting ring (55) is connected to the side wall of the housing (1). A first insulating ring (56) is installed on the end face of the connecting ring (55). A stationary contact piece (6) is also installed on the inner wall of the housing (1). A protective component (7) is provided on the outside of the stationary contact piece (6). The protective component (7) includes a second protective sleeve (71). A spring (72) is provided inside the second protective sleeve (71). A movable rod (73) is connected to the top of the multiple springs (72). A second insulating ring (74) is connected to the end of the movable rod (73).

2. The latching and tripping device for an automatic transfer switch according to claim 1, characterized in that, The actuating component (2) has a third rotating hole, through which a first rotating shaft (8) passes. Both ends of the first rotating shaft (8) are connected to the opening wall at the top of the outer casing (1).

3. The latching and tripping device for an automatic transfer switch according to claim 1, characterized in that, The actuating member (2) has a fourth rotating hole, the linkage member (4) has a fifth rotating hole, a first rotating hole and a second rotating hole, the connecting rod (3) is arranged in a U-shape, and the transverse shaft structure of the connecting rod (3) is arranged in the fourth rotating hole and the fifth rotating hole.

4. The latching and tripping device for an automatic transfer switch according to claim 3, characterized in that, An I-shaped rod is inserted into the first rotating hole, and the end of the I-shaped rod is connected to the output end of the electromagnet (11).

5. The latching and tripping device for an automatic transfer switch according to claim 3, characterized in that, The movable contact piece (51) is fitted with a first protective sleeve (57), and a slide is provided on the top wall of the first protective sleeve (57). The hinge seat (52) is disposed in the slide, and the shaft structure of the hinge seat (52) is disposed in the second rotating hole.

6. The latching and tripping device for an automatic transfer switch according to claim 5, characterized in that, The first protective sleeve (57) is provided with a wire (58), and the end of the wire (58) is connected to the bottom wall of the movable contact piece (51).

7. The latching and tripping device for an automatic transfer switch according to claim 1, characterized in that, The second protective sleeve (71) has a movable cavity, and the anti-detachment end of the movable rod (73) is set in the movable cavity. The diameter of the anti-detachment end of the movable rod (73) is larger than the diameter of the opening of the movable cavity.

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