Tension type arc chute front single-contact contact module

Abstract

The utility model provides a tension type arc chute front single contact contact module comprising a housing, the housing comprises an arc extinguish chamber arranged at the front end of the housing, an action chamber arranged at the rear end of the housing, a tripping chamber arranged above the action chamber, and hardware arranged in the housing above the arc extinguish chamber and provided with a static contact; a movable feeler lever hinged through a swing shaft is arranged in the action chamber, a tension spring is arranged at one end, far away from the swing shaft, of the movable feeler lever, and a movable contact in normally closed contact with the static contact is arranged at the other end of the movable feeler lever; a tripping assembly and a swing rod are arranged in the tripping chamber. The front end of the swing rod faces the front end of the shell, and the rear end of the swing rod is hinged to the shell. The push rod of the tripping assembly pushes the swing rod, so that the swing end of the swing rod pushes the linkage rod to move downwards, and the movable contact rod is synchronously pushed to swing downwards, so that the movable contact is 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] The utility model relates to the field of electrical fittings, and particularly relates to a single-contact module of a pull-type arc-extinguishing grid. BACKGROUND

[0002] The existing control and protection switch and other devices are often provided with multiple contact modules, each of which controls the on-off of each phase, and the dynamic contact piece is generally driven in a translation mode during control, so that the two dynamic contacts at both ends of the dynamic contact piece are in contact with the static contacts of the incoming line and the outgoing line respectively, thereby achieving the on-off purpose. This structure has two sets of contacts for each phase (each contact module), which increases the material cost and the process difficulty, and the two sets of contacts also increase the failure risk. SUMMARY

[0003] In view of the above problems, the utility model aims to provide a single-contact module of a pull-type arc-extinguishing grid, which can effectively reduce the number of contacts, ensure the contact reliability, reduce the production cost, has a simple structure, and keep the tension spring away from the influence of electric arc.

[0004] In view of the above problems, the utility model provides the following technical scheme: a single-contact module of a pull-type arc-extinguishing grid, comprising a shell, the shell comprises an arc-extinguishing chamber provided with an arc-extinguishing grid at the front end, a moving chamber at the rear end, and a trip chamber above the moving chamber, and further comprises hardware inside the shell above the arc-extinguishing chamber, one end of the hardware extends outward from the front end of the shell, and the other end extends to one side of the arc-extinguishing grid facing the moving chamber and forms a downward static contact; the moving chamber is provided with a dynamic contact rod hinged through a swing shaft, one end of the dynamic contact rod away from the swing shaft is provided with a tension spring, and the other end swings along the swing shaft under the pulling of the tension spring, so that the dynamic contact at the front end of the dynamic contact rod swings upward and keeps the static contact in a normally closed contact; the trip chamber is provided with a trip assembly and a swing rod below the trip assembly, the swing rod has a front end facing the front end of the shell and a rear end hinged to the shell; further comprising a linkage rod that can slide up and down in the moving chamber, the swing end of the swing rod is pushed by the push rod of the trip assembly to push the linkage rod downward, so as to synchronously push the dynamic contact rod downward to separate the dynamic contact and the static contact; one end of the trip coil of the trip assembly is electrically connected to the dynamic contact rod through a flexible line, and the other end is connected to the shell through an external connection line.

[0005] The utility model is further provided as follows: one end of the tension spring is matched with the dynamic contact rod, and the other end is connected to the shell through a spring pin.

[0006] The utility model is further provided as follows: the tension spring is a metal elastic sheet, the metal elastic sheet comprises a pin joint section, a force storage section connected to the pin joint section, and a claw section connected to the force storage section, the force storage section is in a C shape or a U shape, and the claw section is attached to the dynamic contact rod.

[0007] The utility model further provides for, the swing rod is equipped with reset spring for swing back reset under the push of the push rod of tripping assembly.

[0008] The utility model further provides for, the lower end of the linkage rod is opposite to the moving contact rod, and the other end is out of the upper end of the shell and is located in the front side of the tripping chamber; one side of the linkage rod facing the tripping chamber is equipped with 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 equipped with control head.

[0009] The utility model further provides for, it also includes the unlocking swing arm in the front of tripping assembly, the middle section of unlocking swing arm is hinged with tripping assembly or shell and the hinging axis is towards the front-back direction of shell;The lower section of unlocking swing arm is located on the side of swing rod before the swing of swing rod, and the swing of swing rod after the swing of swing rod leaves the swing space for the lower end of unlocking swing arm and makes the lower end of unlocking swing arm swing to the upper side of swing rod and opposite to swing rod to reset locking.

[0010] The utility model further provides for, the unlocking swing arm is equipped with locking spring, and the lower end of unlocking swing arm after the swing of swing rod swings to the upper side of swing rod under the drive of locking spring, and the upper end of unlocking swing arm is equipped with unlocking part.

[0011] The utility model further provides for, the outer wall of external connection wire out of shell is equipped with insulating layer and the terminal is equipped with conductive pressure connecting piece.

[0012] The utility model further provides for, the shell is made into by two side covers, and the two side covers are fixed through C-shaped hoop clamping.

[0013] The utility model has the advantages of:

[0014] 1、the one end of hardware outside the shell and the external connection wire out of shell are all used for wiring, and the other end of tripping coil is electrically connected with the moving contact rod near the hinging position through flexible wire, so as to reduce the influence of flexible wire flexibility on the movement of moving contact rod;Under normal conditions, the moving contact rod swings under the pull of tension spring, so that the moving contact and the static contact are in contact to realize conduction, when the current is too large, the push rod of tripping assembly pushes the swing rod to swing down and makes the linkage rod go down to push the moving contact rod to swing down, so that the moving contact and the static contact are separated, and arc extinguishing grid is used for arc extinguishing, and the tension spring is stored and stretched;This structure only needs one moving contact and one static contact, since the moving contact and the static contact are generally noble metal, the material cost is effectively saved, the process difficulty is reduced, and the service life and reliability are improved;

[0015] 2、when using metal elastic sheet, the C-shaped or U-shaped structure of the force storage section is expanded to store force;

[0016] 3、the upper end of linkage rod is out of the upper end of shell and is used for adapting with the action mechanism of equipment;The linkage groove and swing rod adapt to control the action of linkage rod, and also provide the linkage rod with up-down sliding free travel degree before the action of swing rod.

[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 type of tension spring of this utility model in its closed state.

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

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

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

[0029] The meaning of the reference signs in the figure: 10 - housing; 101 - side cover; 102 - embedding groove; 11 - arc extinguishing chamber; 12 - action chamber; 121 - swing shaft; 122 - tension spring; 1221 - pin joint section; 1222 - force storage section; 1223 - claw section; 123 - spring pin; 13 - tripping chamber; 20 - arc extinguishing grid; 30 - hardware; 31 - static contact; 40 - moving contact rod; 41 - moving contact; 50 - tripping assembly; 51 - swing lever; 511 - reset spring; 52 - linkage rod; 521 - linkage groove; 522 - control head; 53 - push rod; 54 - tripping coil; 55 - flexible wire; 56 - external wire; 561 - insulation layer; 562 - conductive pressure connector; 60 - unlocking swing arm; 61 - locking spring; 62 - unlocking part; 70 - C-shaped hoop. DETAILED DESCRIPTION

[0030] The specific embodiments of the utility model are described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the utility model, but are not used to limit the scope of the utility model.

[0031] Reference Figures 1 to 8 As Figures 1 to 8 shown in a kind of tension type arc extinguishing grid front single-contact contact module, including housing 10, the housing 10 includes the arc extinguishing chamber 11 in its front end and is equipped with arc extinguishing grid 20, the action chamber 12 in its rear end and the tripping chamber 13 above the action chamber 12, also include the hardware 30 in the housing 10 above the arc extinguishing chamber 11, the hardware 30 one end extends from the front end of the housing 10, the other end extends to the side of arc extinguishing grid 20 towards the action chamber 12 and forms the static contact 31 towards down;The action chamber 12 is equipped with moving contact rod 40 by swing shaft 121 hinged, the moving contact rod 40 is equipped with tension spring 122 at the end away from swing shaft 121, the other end is swung along swing shaft 121 under the pull of tension spring 122 to make the moving contact 41 at its front end swing and keep normally closed contact with static contact 31;The tripping chamber 13 is equipped with tripping assembly 50 and swing lever 51 below tripping assembly 50, the swing lever 51 front end is towards the front end of the housing 10 and rear end is hinged with the housing 10;Also include the linkage rod 52 that can slide up and down in the action chamber 12, the push rod 53 of tripping assembly 50 pushes swing lever 51 to make its swing end push linkage rod 52 down to synchronously push moving contact rod 40 down swing and make moving contact 41 and static contact 31 separate;The tripping coil 54 of tripping assembly 50 one end is electrically connected with moving contact rod 40 by flexible wire 55, the other end is connected out of the housing 10 by external wire 56.

[0032] In the structure, the one end of the hardware 30 exposed outside the shell 10 and the external connecting wire 56 connected outside the shell 10 are both used for wiring, the other end of the release coil 54 is electrically connected to the moving contact lever 40 near the hinged position through the flexible wire 55, so as to reduce the influence of the flexibility of the flexible wire 55 on the movement of the moving contact lever 40; under the normal state, the moving contact lever 40 is swung upward under the pulling of the tension spring 122, so that the moving contact 41 is in contact with the static contact 31 to realize conduction, when the current is too large, the push rod 53 of the release assembly 50 pushes the swing lever 51 to swing downward, and the connecting lever 52 is pushed downward to swing the moving contact lever 40 downward, so that the moving contact 41 is separated from the static contact 31, and the arc extinguishing grid 20 is used for arc extinguishing, and the tension spring 122 is stored and stretched; the structure only needs one moving contact 41 and one static contact 31, since the moving contact 41 and the static contact 31 are generally made of noble metal, the material cost is effectively saved, the process difficulty is reduced, and the service life and reliability are improved.

[0033] In the embodiment, one end of the tension spring 122 is matched with the moving contact lever 40, and the other end is connected with the shell 10 through the spring pin 123.

[0034] In the structure, the spring pin 123 can be integrally injection molded with the shell 10, or can be fixed by pin connection with the shell 10.

[0035] In the embodiment, the tension spring 122 is a metal elastic sheet, which includes a pin connection section 1221, a force storage section 1222 connected with the pin connection section 1221, and a claw section 1223 connected with the force storage section 1222, the force storage section 1222 is in a C shape or a U shape, and the claw section 1223 is attached to the moving contact lever 40.

[0036] In the structure, the force storage section 1222 is expanded to store force through the C shape or the U shape.

[0037] In the embodiment, the swing lever 51 is provided with a reset spring 511 for swinging upward after being pushed downward by the push rod 53 of the release assembly 50.

[0038] In the structure, the reset spring 511 is preferably a tension spring.

[0039] In the embodiment, the lower end of the connecting lever 52 abuts against the moving contact lever 40, and the other end is passed out of the upper end of the shell 10 and located in front of the release chamber 13; one side of the connecting lever 52 facing the release chamber 13 is provided with a connecting groove 521, and the swinging end of the swing lever 51 is located in the connecting groove 521; and the end of the connecting lever 52 away from the moving contact lever 40 is provided with a control head 522.

[0040] In the structure, the upper end of the connecting lever 52 is passed out of the upper end of the shell 10, and is used for matching with the action mechanism of the equipment; the connecting groove 521 matches with the swing lever 51 to control the action of the connecting lever 52, and also provides the connecting lever 52 with the freedom of upward and downward sliding idle stroke before the swing lever 51 acts.

[0041] In the embodiment, the unlocking swing arm 60 is arranged in front of the tripping assembly 50, the middle section of the unlocking swing arm 60 is hinged to the tripping assembly 50 or the shell 10, and the hinging axis is directed to the front-back direction of the shell 10; the lower front unlocking swing arm 60 is arranged on the side of the swing lever 51, and the lower rear unlocking swing arm 60 leaves a swing space for the swing lever 51 and swings above the swing lever 51 to abut against the swing lever 51 to reset and lock the swing lever 51.

[0042] In the above structure, when the tripping coil 54 operates, the movable contact 41 is disconnected from the fixed contact 31, the swing lever 51 leaves a space for the unlocking swing arm 60 to swing, the lower end of the unlocking swing arm 60 swings to reset the swing lever 51 and block the swing lever 51, so that the connecting lever 52 keeps abutting against the movable contact lever 40 to avoid the movable contact 41 and the fixed contact 31 from being combined again, and when resetting is needed, the unlocking swing arm 60 is swung reversely to be separated from above the swing lever 51, so that the swing lever 51, the connecting lever 52 and the movable contact lever 40 are reset.

[0043] In the embodiment, the unlocking swing arm 60 is provided with a locking spring 61, the lower end of the unlocking swing arm 60 swings to above the swing lever 51 under the driving of the locking spring 61 after the swing lever 51 swings, and the upper end of the unlocking swing arm 60 is provided with an unlocking part 62.

[0044] In the above structure, the locking spring 61 is preferably a torsion spring arranged at the hinging position of the unlocking swing arm 60, and the unlocking part 62 is used to adapt to the action mechanism of the equipment.

[0045] In the embodiment, the outer wall of the external connecting line 56 outside the shell 10 is provided with an insulating layer 561, and the end is provided with a conductive pressure connector 562.

[0046] In the above structure, the conductive pressure connector 652 is used to provide a wiring function on the equipment.

[0047] In the embodiment, the shell 10 is formed by buckling two side covers 101, and the two side covers 101 are fixed by the C-shaped hoop 70.

[0048] In the above structure, the side cover 101 is provided with an embedded groove 102 at the position corresponding to the C-shaped hoop 70, the C-shaped hoop 70 is arranged in the embedded groove 102 to avoid protruding outward, and the compactness of the overall shape is ensured.

[0049] The above only describes the preferred embodiments of the present application, and it should be noted that, for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and the above-mentioned improvements and modifications are also regarded as the protection scope of the present application.

Claims

1. A single contact module for a pull-out arc chute, comprising a housing, characterized in that: The shell comprises an arc extinguishing chamber at its front end and provided with arc extinguishing grids, an action chamber at its rear end, and a tripping chamber above the action chamber, and further comprises hardware inside the shell above the arc extinguishing chamber, one end of the hardware extending out of the front end of the shell and the other end extending to one side of the arc extinguishing grids facing the action chamber and forming a downward static contact point; the action chamber is provided with a movable contact lever hinged by a swing shaft, one end of the movable contact lever away from the swing shaft being provided with a tension spring, and the other end of the movable contact lever being swung along the swing shaft under the pulling of the tension spring to make the movable contact point at the front end of the movable contact lever swing upward and keep constant closed contact with the static contact point; the tripping chamber is provided with a tripping assembly and a swing lever below the tripping assembly, the swing lever having its front end facing the front end of the shell and its rear end being hinged to the shell; further comprising a linkage lever inside the action chamber and slidable up and down, the swing end of the swing lever being pushed by the swing end of the swing lever under the pushing of the push rod of the tripping assembly to push the linkage lever downward and thus synchronously push the movable contact lever to swing downward to make the movable contact point separate from the static contact point; one end of the tripping coil of the tripping assembly being electrically connected to the movable contact lever through a soft wire and the other end of the tripping coil being connected out of the shell through an external wire.

2. A single contact module for use in front of a drag-type arc chute according to claim 1, characterized in that: One end of the tension spring is adapted to the movable contact lever and the other end of the tension spring is connected to the shell through a spring pin.

3. A single contact module for use in front of a drag-type arc chute according to claim 1 or 2, characterized in that: The tension spring is a metal spring sheet, the metal spring sheet comprising a pin joint section, a force storage section connected to the pin joint section, and a claw section connected to the force storage section, the force storage section being C-shaped or U-shaped, and the claw section being attached to the movable contact lever.

4. A single contact module for use in front of a drag-type arc chute according to claim 1, characterized in that: The swing lever is provided with a reset spring for swinging upward and resetting under the pushing of the push rod of the tripping assembly.

5. A single contact module for use in front of a drag-type arc chute according to claim 1, characterized in that: The lower end of the linkage lever abuts against the movable contact lever and the other end of the linkage lever passes out of the upper end of the shell and is located at the front side of the tripping chamber; one side of the linkage lever facing the tripping chamber is provided with a linkage groove, the swing end of the swing lever being located in the linkage groove; and the end of the linkage lever away from the movable contact lever is provided with a control head.

6. The tension-type arc-extinguishing grid front single-contact contact module according to claim 1, characterized in that: Further comprising an unlocking swing arm in front of the tripping assembly, the middle section of the unlocking swing arm being hinged to the tripping assembly or the shell and the hinging axis being towards the front and back directions of the shell; the lower section of the unlocking swing arm being located at the side of the swing lever before the swing lever swings downward, and the lower end of the unlocking swing arm being left with swing space after the swing lever swings downward and thus swinging above the swing lever to abut against the swing lever for resetting and locking.

7. A single contact module for use in front of a magnetic blowout grid according to claim 6, characterized in that: The unlocking swing arm is provided with a locking spring, the lower end of the unlocking swing arm swinging above the swing lever under the driving of the locking spring after the swing lever swings downward, and the upper end of the unlocking swing arm being provided with an unlocking part.

8. A single contact module for use in front of a drag-type arc chute according to claim 1, characterized in that: The external wall of the external wire connected out of the shell is provided with an insulating layer and a conductive pressure contact piece at the end thereof.

9. A single contact module for use in front of a drag-type arc chute according to claim 1, characterized in that: The shell is formed by buckling two side covers, and the two side covers are fixed by C-shaped clamps.

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