Pull-type arc chute rear-mounted single-contact contact module

Abstract

The utility model provides a pull type arc chute rear-mounted single-contact contact module, comprising a housing, the housing comprises an action chamber arranged at the front end of the housing, an arc extinguishing chamber arranged at the rear end of the housing and provided with an arc chute, a tripping chamber arranged above the arc extinguishing chamber, a first hardware and a second hardware, one end of the first hardware extends out of the front end of the shell, and the second hardware is provided with a static contact; a movable feeler lever hinged through a swing shaft is arranged in the action chamber, one end of the movable feeler lever is provided with a tension spring, and a movable contact and a static contact of the other end of the movable feeler lever are normally closed under the pulling of the tension spring; a tripping assembly and a swing rod are arranged in the tripping chamber, and the rear end of the swing rod is hinged to the shell; and the push rod of the tripping assembly pushes the swing rod to enable the linkage rod to move downwards so as to push the movable feeler lever to swing downwards to enable the movable contact to be separated from the static contact. The utility model has the advantages that the number of contacts can be effectively reduced, the production cost is reduced while the contact reliability is ensured, and the tension spring is far away from the influence of electric arc.

Description

Technical Field

[0001] This utility model relates to the field of electrical accessories, specifically to a tension-type arc-extinguishing grid rear single-contact contact module. Background Technology

[0002] Existing control and protection switches and other equipment often have multiple sets of contact modules installed. Each contact module controls the on / off state of each phase. During control, the moving contact piece is usually driven by translating, so that the two moving contacts at both ends of the moving contact piece make contact with the stationary contacts of the incoming and outgoing lines respectively, thereby achieving the purpose of switching on and off. This structure has two sets of contacts per phase (each contact module), which increases material costs and manufacturing difficulty. At the same time, the two sets of contacts also increase the risk of failure. Utility Model Content

[0003] Based on the above problems, the purpose of this utility model is to provide a tension-type arc-extinguishing grid rear single-contact contact module that can effectively reduce the number of contacts, ensure contact reliability, reduce production costs, and keep the tension spring away from the influence of electric arc.

[0004] To address the above problems, the following technical solution is provided: A tension-type arc-extinguishing grid rear-mounted single-contact contact module, comprising a housing, the housing including an actuating chamber at its front end, an arc-extinguishing chamber at its rear end and equipped with an arc-extinguishing grid, a tripping chamber above the arc-extinguishing chamber, and further including a first hardware component located in the housing above the actuating chamber and a second hardware component located in the housing above the arc-extinguishing chamber. One end of the first hardware component extends outward from the front end of the housing, and the second hardware component has a stationary contact on its bottom surface at the position in front of the arc-extinguishing grid; the actuating chamber is provided with a moving contact rod hinged to a swing shaft, the end of the moving contact rod away from the swing shaft is provided with a tension spring, and the other end is... The tension spring pulls down along the swing axis, causing the moving contact at its front end to swing upwards and maintain normally closed contact with the stationary contact. The tripping chamber is equipped with a tripping assembly and a swing rod located below the tripping assembly. The front end of the swing rod faces the front end of the housing and the rear end is hinged to the housing. It also includes a connecting rod located in the actuating chamber that can slide up and down. The push rod of the tripping assembly pushes the swing rod so that its swing end pushes the connecting rod downwards, thereby synchronously pushing the moving contact rod downwards to separate the moving contact from the stationary contact. One end of the tripping coil of the tripping assembly is electrically connected to the second hardware component through a conductor, and the other end is connected to the housing through an external wire. The first hardware component and the moving contact rod are connected by a flexible wire.

[0005] The present invention is further configured such that one end of the tension spring is adapted to the moving contact rod, and the other end is connected to the housing through a spring pin.

[0006] The present invention is further configured such that the tension spring is a metal spring sheet, the metal spring sheet includes a pin joint section, a power storage section connected to the pin joint section, and a latching section connected to the power storage section. The power storage section is C-shaped or U-shaped, and the latching section is attached to the moving contact rod.

[0007] The present invention is further provided that the swing arm is provided with a return spring for resetting the upper swing after the push rod of the tripping assembly pushes the lower swing.

[0008] The present invention is further configured such that the lower end of the linkage rod abuts against the moving contact rod, and the other end extends out from the upper end of the housing and is located in front of the trip chamber; the side of the linkage rod facing the trip chamber is provided with a linkage groove, and the swing end of the swing rod is located in the linkage groove; the end of the linkage rod away from the moving contact rod is provided with a control head.

[0009] The present invention is further configured to include an unlocking swing arm located in front of the tripping assembly, wherein the middle section of the unlocking swing arm is hinged to the tripping assembly or the housing and the hinge axis is oriented in the front-rear direction of the housing; before the swing arm swings down, the lower section of the unlocking swing arm is located on the side of the swing arm; after the swing arm swings down, swing space is left for the lower end of the unlocking swing arm and the lower end of the unlocking swing arm swings up above the swing arm and abuts against the swing arm to reset and lock the swing arm.

[0010] The present invention is further configured such that the unlocking swing arm is provided with a locking spring, and after the swing arm swings down, the lower end of the unlocking swing arm swings to the top of the swing arm under the action of the locking spring, and the upper end of the unlocking swing arm is provided with an unlocking part.

[0011] The present invention is further configured such that the outer wall of the external wiring of the external connection housing is provided with an insulating layer and the end is provided with a voltage-conducting connector.

[0012] The present invention is further configured such that the housing is formed by two side covers fastening together, and the two side covers are fixed together by C-shaped clamps.

[0013] The beneficial effects of this utility model are:

[0014] 1. The end of the first hardware component exposed outside the housing and the external wiring connecting it to the housing are used for wiring. The other end of the first hardware component is connected to the moving contact rod near the hinge position by a flexible wire to reduce the influence of the flexible wire's flexibility on the movement of the moving contact rod. Under normal conditions, the moving contact rod swings upward under the tension of the tension spring, making the moving contact contact with the stationary contact to achieve conduction. When the current is too large, the push rod of the tripping assembly pushes the swing rod downward and causes the connecting rod to move downward, pushing the moving contact rod downward to separate the moving contact from the stationary contact and extinguish the arc using the arc-extinguishing grid. At the same time, the tension spring stores and stretches. This structure only requires one moving contact and one stationary contact. Since the moving contact and the stationary contact are generally made of precious metals, it effectively saves material costs, reduces the difficulty of the process, and improves the service life and reliability.

[0015] 2. When the tension spring is a metal spring sheet, it expands and stores energy through the C-shaped or U-shaped structure of the energy storage section;

[0016] 3. The upper end of the connecting rod extends out from the upper end of the housing to be adapted to the action mechanism of the equipment; while the connecting groove is adapted to the swing arm to control the action of the connecting rod, it also provides the connecting rod with the freedom of up and down sliding stroke before the swing arm moves.

[0017] 4. When the trip coil is activated, the moving contact and the stationary contact disconnect. At the same time, the lever moves downward to allow the unlocking arm to swing and create space. After the unlocking arm swings, its lower end blocks the lever from resetting, so that the connecting rod maintains its resistance to the moving contact rod and prevents the moving contact and the stationary contact from re-engaging. When resetting is required, swing the unlocking arm in the opposite direction to remove it from above the lever so that the lever, connecting rod and moving contact rod can be reset.

[0018] 5. The locking spring is preferably a torsion spring located at the hinge position of the unlocking swing arm; the unlocking part is used to adapt to the actuation mechanism of the equipment;

[0019] 6. The side cover has an embedding groove at the position of the C-shaped hoop. The C-shaped hoop is located in the embedding groove to avoid protruding outward and to ensure the compactness of the overall shape.

[0020] 7. The side of the tension spring away from the arc-extinguishing grid can effectively prevent the electric arc from burning it. Attached Figure Description

[0021] Figure 1 This is a first-person perspective three-dimensional structural diagram of the present invention.

[0022] Figure 2 This is a schematic diagram of the overall second-view three-dimensional structure of this utility model.

[0023] Figure 3 This is a first-view three-dimensional structural diagram of the tripping assembly of this utility model.

[0024] Figure 4 This is a two-dimensional structural diagram of the tripping assembly of this utility model from a second perspective.

[0025] Figure 5 This is a three-dimensional structural diagram of the first installation method of the tension spring of this utility model in the closed state.

[0026] Figure 6 This is a three-dimensional structural diagram of the tension spring of this utility model in the first installation form in the disconnected state.

[0027] Figure 7 This is a three-dimensional structural diagram of the second mounting configuration of the tension spring of this utility model in its closed state.

[0028] Figure 8 This is a three-dimensional structural diagram of the tension spring of this utility model in the second installation form, in the disconnected state.

[0029] The labels in the diagram mean: 10-Housing; 101-Side cover; 102-Embedded groove; 11-Actuating chamber; 111-First hardware component; 112-Swing shaft; 113-Tension spring; 1131-Pin joint section; 1132-Storage section; 1133-Claw section; 114-Flexible wire; 115-Spring pin; 12-Arc extinguishing chamber; 121-Second hardware component; 1211-Static contact; 13-Trigger chamber; 2 0-Arc extinguishing grid; 30-Moving contact rod; 31-Moving contact; 40-Trip assembly; 41-Swing rod; 411-Reset spring; 42-Connecting rod; 421-Connecting groove; 422-Control head; 43-Push rod; 44-Trip coil; 45-External wiring; 451-Insulation layer; 452-Conducting voltage connector; 50-Unlocking swing arm; 51-Locking spring; 52-Unlocking part; 60-C-shaped clamp. Detailed Implementation

[0030] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0031] refer to Figures 1 to 8 ,like Figures 1 to 8 The diagram shows a tension-type arc-extinguishing grid rear-mounted single-contact contact module, comprising a housing 10. The housing 10 includes an actuating chamber 11 at its front end, an arc-extinguishing chamber 12 at its rear end and equipped with an arc-extinguishing grid 20, and a tripping chamber 13 above the arc-extinguishing chamber 12. It also includes a first hardware component 111 located above the actuating chamber 11 within the housing 10, and a second hardware component 121 located above the arc-extinguishing chamber 12 within the housing 10. One end of the first hardware component 111 extends outward from the front end of the housing 10, and the second hardware component 121 has a stationary contact 1211 on its bottom surface at the position in front of the arc-extinguishing grid 20. The actuating chamber 11 contains a movable contact rod 30 hinged to a swing shaft 112. One end of the movable contact rod 30 away from the swing shaft 112 is equipped with a tension spring 113, and the other end swings along the swing shaft 112 under the pull of the tension spring 113. The shaft 112 swings to make the moving contact 31 at its front end swing upward and maintain normally closed contact with the stationary contact 1211; the tripping chamber 13 is provided with a tripping assembly 40 and a swing rod 41 located below the tripping assembly 40. The front end of the swing rod 41 faces the front end of the housing 10 and the rear end is hinged to the housing 10; it also includes a connecting rod 42 located in the action chamber 11 that can slide up and down. The push rod 43 of the tripping assembly 40 pushes the swing rod 41 so that its swing end pushes the connecting rod 42 downward, thereby synchronously pushing the moving contact rod 30 downward to separate the moving contact 31 from the stationary contact 1211; one end of the tripping coil 44 of the tripping assembly 40 is electrically connected to the second hardware component 121 through a conductor, and the other end is connected to the housing 10 through an external wire 45; the first hardware component 111 and the moving contact rod 30 are connected by a flexible wire 114.

[0032] In the above structure, the end of the first hardware component 111 exposed outside the housing 10 and the external wiring 45 connected to the housing 10 are both used for wiring. The other end of the first hardware component 111 is connected to the moving contact rod 30 near the hinge position by a flexible wire 114 to reduce the influence of the flexibility of the flexible wire 114 on the movement of the moving contact rod 30. Under normal conditions, the moving contact rod 30 swings upward under the tension of the tension spring 113, so that the moving contact 31 contacts the stationary contact 1211 to achieve conduction. When the current is too large, the push rod 43 of the trip assembly 40 pushes the swing rod 41 downward and causes the connecting rod 42 to move downward, pushing the moving contact rod 30 downward, so that the moving contact 31 separates from the stationary contact 1211 and the arc is extinguished by the arc extinguishing grid 20. At the same time, the tension spring 113 stores and stretches. This structure only requires one moving contact 31 and one stationary contact 1211. Since the moving contact 31 and the stationary contact 1211 are generally made of precious metals, it effectively saves material costs, reduces the difficulty of the process, and improves the service life and reliability.

[0033] In this embodiment, one end of the tension spring 113 is adapted to the moving contact rod 30, and the other end is connected to the housing 10 through the spring pin 115.

[0034] In the above structure, the spring pin 115 can be integrally injection molded with the housing 10, or it can be pin-connected and fixed to the housing 10.

[0035] In this embodiment, the tension spring 113 is a metal spring sheet, which includes a pin section 1131, a power storage section 1132 connected to the pin section 1131, and a claw section 1133 connected to the power storage section 1132. The power storage section 1132 is C-shaped or U-shaped, and the claw section 1133 is attached to the moving contact rod 30.

[0036] In the above structure, expansion and energy storage are achieved through the C-shaped or U-shaped structure of the energy storage section 1132.

[0037] In this embodiment, the swing arm 41 is provided with a return spring 411 for resetting the upper swing after the push rod 43 of the trip assembly 40 pushes the lower swing.

[0038] In the above structure, the return spring 411 is preferably a tension spring 113.

[0039] In this embodiment, the lower end of the linkage rod 42 abuts against the moving contact rod 30, and the other end extends out from the upper end of the housing 10 and is located in front of the trip chamber 13; the side of the linkage rod 42 facing the trip chamber 13 is provided with a linkage groove 421, and the swing end of the swing rod 41 is located in the linkage groove 421; the end of the linkage rod 42 away from the moving contact rod 30 is provided with a control head 422.

[0040] In the above structure, the upper end of the linkage rod 42 extends out from the upper end of the housing 10 and is used to adapt to the action mechanism of the equipment; the linkage groove 421 adapts to the rocker arm 41 to control the movement of the linkage rod 42, and also provides the linkage rod 42 with the freedom of up and down sliding stroke before the rocker arm 41 moves.

[0041] In this embodiment, an unlocking swing arm 50 is also included in front of the tripping assembly 40. The middle section of the unlocking swing arm 50 is hinged to the tripping assembly 40 or the housing 10 and the hinge axis is oriented in the front-back direction of the housing 10. Before the swing rod 41 swings down, the lower section of the unlocking swing arm 50 is located on the side of the swing rod 41. After the swing rod 41 swings down, swing space is left for the lower end of the unlocking swing arm 50 and the lower end of the unlocking swing arm 50 swings up to the top of the swing rod 41 and abuts against the swing rod 41 to reset and lock the swing rod 41.

[0042] In the above structure, when the trip coil 44 is activated, the moving contact 31 and the stationary contact 1211 disconnect. At the same time, the swing arm 41 moves downward to swing the unlocking swing arm 50 to leave space. After the unlocking swing arm 50 swings, its lower end blocks the swing arm 41 from resetting, so that the connecting rod 42 maintains the resistance to the moving contact rod 30 to prevent the moving contact 31 from re-engaging with the stationary contact 1211. When resetting is required, the unlocking swing arm 50 is swung in the opposite direction to remove it from above the swing arm 41, so that the swing arm 41, the connecting rod 42, and the moving contact rod 30 can be reset.

[0043] In this embodiment, the unlocking swing arm 50 is provided with a locking spring 51. After the swing rod 41 swings down, the lower end of the unlocking swing arm 50 swings to above the swing rod 41 under the action of the locking spring 51. The upper end of the unlocking swing arm 50 is provided with an unlocking part 52.

[0044] In the above structure, the locking spring 51 is preferably a torsion spring located at the hinge position of the unlocking arm 50; the unlocking part 52 is used to be adapted to the action mechanism of the device.

[0045] In this embodiment, the outer wall of the external wiring 45 of the external connection housing 10 is provided with an insulating layer 451 and the end is provided with a voltage conductive connector 452.

[0046] In the above structure, the conductive connector 452 is used to provide wiring functionality on the equipment.

[0047] In this embodiment, the housing 10 is formed by two side covers 101 fastening together, and the two side covers 101 are fixed together by a C-shaped clamp 60.

[0048] In the above structure, the side cover 101 is provided with an embedding groove 102 at the position of the C-shaped hoop 60. The C-shaped hoop 60 is located in the embedding groove 102 to avoid protruding outward and to ensure the compactness of the overall shape.

[0049] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model. These improvements and modifications assumed above should also be considered within the protection scope of the present utility model.

Claims

1. A tension-type arc-extinguishing grid rear-mounted single-contact contact module, comprising a housing, characterized in that: The housing includes an actuating chamber at its front end, an arc-extinguishing chamber at its rear end with an arc-extinguishing grid, and a tripping chamber above the arc-extinguishing chamber. It also includes a first hardware component located within the housing above the actuating chamber and a second hardware component located within the housing above the arc-extinguishing chamber. One end of the first hardware component extends outward from the front end of the housing, and the bottom surface of the second hardware component, located in front of the arc-extinguishing grid, has a stationary contact. The actuating chamber contains a movable contact rod hinged to a swing shaft. One end of the movable contact rod away from the swing shaft has a tension spring, and the other end swings along the swing shaft under the tension spring's pull, causing the movable contact at its front end to... The pendulum and the stationary contact maintain normally closed contact; the tripping chamber is provided with a tripping assembly and a pendulum rod located below the tripping assembly, the front end of the pendulum rod facing the front end of the housing and the rear end hinged to the housing; it also includes a linkage rod located in the actuating chamber that can slide up and down, the push rod of the tripping assembly pushes the pendulum rod so that its swing end pushes the linkage rod downward, thereby synchronously pushing the moving contact rod downward to separate the moving contact from the stationary contact; one end of the tripping coil of the tripping assembly is electrically connected to the second hardware component through a conductor, and the other end is connected to the housing through an external wire; the first hardware component and the moving contact rod are connected by a flexible wire.

2. The tension-type arc-extinguishing grid rear single-contact contact module according to claim 1, characterized in that: One end of the tension spring is adapted to the moving contact rod, and the other end is connected to the housing via a spring pin.

3. A tension-type arc-extinguishing grid rear single-contact contact module according to claim 1 or 2, characterized in that: The tension spring is a metal spring sheet, which includes a pin joint section, a power storage section connected to the pin joint section, and a latching section connected to the power storage section. The power storage section is C-shaped or U-shaped, and the latching section is attached to the moving contact rod.

4. The tension-type arc-extinguishing grid rear single-contact contact module according to claim 1, characterized in that: The swing arm is equipped with a return spring for resetting to its original position after being pushed down by the push rod of the tripping assembly.

5. The tension-type arc-extinguishing grid rear single-contact contact module according to claim 1, characterized in that: The lower end of the linkage rod abuts against the moving contact rod, and the other end extends from the upper end of the housing and is located in front of the trip chamber; the side of the linkage rod facing the trip chamber is provided with a linkage groove, and the swing end of the swing rod is located in the linkage groove; the end of the linkage rod away from the moving contact rod is provided with a control head.

6. The tension-type arc-extinguishing grid rear single-contact contact module according to claim 1, characterized in that: It also includes an unlocking swing arm located in front of the tripping assembly. The middle section of the unlocking swing arm is hinged to the tripping assembly or the housing, and the hinge axis faces the front-rear direction of the housing. Before the swing arm swings down, the lower section of the unlocking swing arm is located on the side of the swing arm. After the swing arm swings down, swing space is left for the lower end of the unlocking swing arm, and the lower end of the unlocking swing arm swings up to the top of the swing arm and abuts against the swing arm to reset and lock the swing arm.

7. A tension-type arc-extinguishing grid rear single-contact contact module according to claim 6, characterized in that: The unlocking arm is equipped with a locking spring. After the swing arm swings down, the lower end of the unlocking arm swings to above the swing arm under the action of the locking spring. The upper end of the unlocking arm is equipped with an unlocking part.

8. The tension-type arc-extinguishing grid rear single-contact contact module according to claim 1, characterized in that: The outer wall of the external wiring leading out of the housing is provided with an insulating layer and the end is provided with a voltage-conducting connector.

9. A tension-type arc-extinguishing grid rear single-contact contact module according to claim 1, characterized in that: The housing is formed by two side covers that are snapped together, and the two side covers are fixed together by C-shaped clamps.

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