High-efficiency contactor with low electromagnetic interference

Abstract

The utility model provides a low electromagnetic interference high efficiency contactor, relates to the circuit control field, and comprises a front cover, the front surface of the front cover is provided with two groups of connecting seats, the connecting seats are T-shaped, one side of the front surface of each connecting seat is provided with a wiring screw, the other side of the front surface of each connecting seat is provided with a fastening screw, the top of each group of connecting seats is provided with a group of blades, and the blades are rotatably connected with the connecting seats. A T-shaped handle is arranged at the top of the blade, a U-shaped cutter clamp is arranged on the back of the blade, the inner wall of the cutter clamp is tightly attached to the outer side of the blade, a contactor shell is arranged on the back of the front cover, the handle, a wiring screw, the cutter clamp, a fastening screw, the blade and a connecting base are adopted, the fastening screw fixes the connecting base to the surface of the front cover, and a wire of a control circuit is fastened to the connecting base through the wiring screw. The cutter holder is electrically connected with the coil, the blade is driven by the handle to rotate around the connecting seat, and when the blade moves into the cutter holder, the control circuit is switched on, so that rapid switching-on and switching-off of the contactor circuit are realized, and the debugging and detecting efficiency of the contactor is improved.

Description

Technical Field

[0001] The utility model relates to the field of circuit control, in particular to a low electromagnetic interference and high efficiency contactor. Background Art

[0002] Contactors are divided into AC contactors and DC contactors. They are used in power, power distribution and power consumption. In a broad sense, contactors refer to electrical appliances in industrial electricity that use current flowing through a coil to generate a magnetic field to close the contacts in order to control the load. In electrical engineering, contactors are often used on motors as control objects. Contactors can not only connect and disconnect circuits, but also have low-voltage release protection. Contactors have large control capacity and are suitable for frequent operations and remote control. They are one of the important components in automatic control systems.

[0003] After the existing contactor control circuit is connected, the switch of the control circuit controls the opening and closing of the contactor working circuit. When the contactor needs to be debugged and tested, the control of the contactor is troublesome because the control switch is located far away. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the problem that the control circuit switch is far away during the debugging and detection of the contactor, and the on-off control of the contactor control circuit is troublesome, and a low electromagnetic interference high-efficiency contactor is proposed.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a low electromagnetic interference and high-efficiency contactor, including a front cover, two groups of connecting seats are arranged on the front of the front cover, the connecting seats are T-shaped, one side of the front of the connecting seat is provided with a wiring screw, and the other side of the front of the connecting seat is provided with a fastening screw, each group of the connecting seats is provided with a group of blades on the top, the blades are rotatably connected to the connecting seats, a handle is provided on the top of the blade, the handle is T-shaped, a knife clamp is provided on the back of the blade, the knife clamp is U-shaped, the inner wall of the knife clamp is in close contact with the outer side of the blade, and a contactor shell is provided on the back of the front cover.

[0006] Preferably, the contactor housing is threadedly connected to the front cover, and the edges of the contactor housing and the front cover are both rounded.

[0007] Preferably, a protective cover is provided at the bottom of the front face of the front cover, the protective cover is threadedly connected to the front cover, and two groups of slots aligned with the blades are provided on the front face of the protective cover.

[0008] Preferably, a fixed iron core is provided inside the contactor housing, the fixed iron core is fixedly connected to the contactor housing, the fixed iron core is E-shaped, and a coil is provided inside the fixed iron core.

[0009] Preferably, an RC filter circuit is provided on one side of the front face of the coil, the front face of the RC filter circuit is electrically connected to a group of tool clamps, and the other side of the front face of the coil is electrically connected to another group of tool clamps.

[0010] Preferably, a spring is provided on the top of the coil, a movable iron core is provided on the top of the spring, and the movable iron core has the same shape as the fixed iron core.

[0011] Preferably, two groups of fixed contacts are provided on the top of the movable iron core, two groups of movable contacts are provided on the top of the two groups of fixed contacts, a controlled circuit terminal is provided on one side of the top of the fixed contact, and the top of the controlled circuit terminal passes through the top of the contactor housing.

[0012] Beneficial Effects

[0013] The utility model adopts a handle, a wiring screw, a knife clamp, a fastening screw, a blade, and a connecting seat. The fastening screw fixes the connecting seat on the surface of the front cover, the wiring screw fastens the wire of the control circuit on the connecting seat, the knife clamp is electrically connected to the coil, and the handle drives the blade to rotate around the connecting seat. When the blade moves to the inside of the knife clamp, the control circuit is connected, and the contactor circuit is quickly opened and closed. The user does not need to move a long distance to control the switch, which improves the efficiency of contactor debugging and detection. In addition, since the control switch is cancelled, the number of wire sections of the control circuit is reduced, and when a control circuit fails, it is easier to repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is an axonometric drawing of the utility model;

[0015] Figure 2 It is a front view of the utility model;

[0016] Figure 3 This is an axonometric view of the interior of the protective cover of the utility model;

[0017] Figure 4 This is a front view of the interior of the contactor housing of the utility model.

[0018] Legend:

[0019] 1. Controlled circuit terminal; 2. Contactor housing; 3. Protective cover; 4. Front cover; 5. Handle; 6. Wiring screws; 7. Knife clamp; 8. Fastening screws; 9. Knife blade; 10. Connecting seat; 11. Movable contact; 12. Fixed contact; 13. Movable iron core; 14. Spring; 15. RC filter circuit; 16. Coil; 17. Fixed iron core. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0021] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings. Specific embodiment one:

[0023] Reference Figure 1-4 The present embodiment provides a low electromagnetic interference high-efficiency contactor, including a front cover 4, two groups of connection seats 10 are arranged on the front of the front cover 4, the connection seats 10 are T-shaped, a wiring screw 6 is arranged on one side of the front of the connection seat 10, and a fastening screw 8 is arranged on the other side of the front of the connection seat 10. The fastening screw 8 fixes the connection seat 10 to the surface of the front cover 4, and a group of blades 9 are arranged on the top of each group of connection seats 10. The wiring screw 6 transmits the current inside the control circuit to the blade 9 through the connection seat 10. The blade 9 is rotatably connected to the connection seat 10, and a handle 5 is arranged on the top of the blade 9. The handle 5 is used to adjust the blade The handle 5 is T-shaped, a blade clamp 7 is provided on the back of the blade 9, the blade clamp 7 is U-shaped, the inner wall of the blade clamp 7 is in close contact with the outer side of the blade 9, the blade clamp 7 clamps the blade 9 and transmits the current on the blade 9 to the inside of the coil 16, a protective cover 3 is provided on the bottom of the front face of the front cover 4, the protective cover 3 is threadedly connected to the front cover 4, two groups of slots aligned with the blade 9 are provided on the front face of the protective cover 3, a contactor housing 2 is provided on the back of the front cover 4, the contactor housing 2 is threadedly connected to the front cover 4, the edges of the contactor housing 2 and the front cover 4 are both rounded, and a fixed The fixed iron core 17 is fixedly connected to the contactor housing 2, and the fixed iron core 17 is E-shaped. A coil 16 is arranged inside the fixed iron core 17. The coil 16 generates magnetism when energized. An RC filter circuit 15 is arranged on the front side of the coil 16. The RC filter circuit 15 includes a first capacitor, a second capacitor, a first resistor, and a second resistor. The RC filter circuit 15 reduces the electromagnetic generated by the contactor, thereby reducing the interference of the contactor to the outside world. The front side of the RC filter circuit 15 is electrically connected to a group of tool clamps 7, and the other side of the front side of the coil 16 is electrically connected to another group of tool clamps 7. The coil 1 A spring 14 is provided at the top of the movable core 13, and a movable iron core 13 is provided at the top of the spring 14. The spring 14 provides a thrust toward the top of the movable iron core 13. The movable iron core 13 has the same shape as the fixed iron core 17. Two groups of fixed contacts 12 are provided at the top of the movable iron core 13. Two groups of movable contacts 11 are provided at the top of the two groups of fixed contacts 12. The movable contacts 11 change with the change of the position of the movable iron core 13. A controlled circuit terminal 1 is provided on one side of the top of the fixed contact 12. The controlled circuit terminal 1 is electrically connected to the controlled circuit, and the top of the controlled circuit terminal 1 passes through the top of the contactor housing 2.

[0024] The user connects the two groups of wires of the control circuit to the two groups of wiring screws 6 respectively, and fixes the connecting seat 10 on the surface of the front cover 4 by tightening the screws 8. The knife clamp 7 is electrically connected to the coil 16, and the blade 9 is driven to rotate around the connecting seat 10 by the handle 5. When the blade 9 moves to the inside of the knife clamp 7, the control circuit is connected, and the contactor circuit is quickly opened and closed. The user does not need to move a long distance to control the switch, which improves the efficiency of contactor debugging and detection. In addition, since the control switch is cancelled, the number of wire segments of the control circuit is reduced. When the control circuit fails, it is easier to repair. When the control circuit is connected, the coil 16 generates magnetism to attract the movable iron core 13, and the movable iron core 13 moves toward the bottom so that the movable contact 11 contacts the fixed contact 12. The controlled circuit is connected and starts to work. When the blade 9 is turned downward, the control circuit is disconnected, the coil 16 no longer generates magnetism, and the movable iron core 13 moves toward the top under the elastic force of the spring 14. The movable contact 11 no longer contacts the fixed contact 12, and the controlled circuit is disconnected. Specific embodiment 2:

[0026] Reference Figure 1-4 The present embodiment provides a low electromagnetic interference high-efficiency contactor, including a front cover 4, two groups of connecting seats 10 are arranged on the front of the front cover 4, a wiring screw 6 is arranged on one side of the front of the connecting seat 10, and a fastening screw 8 is arranged on the other side of the front of the connecting seat 10, and a group of blades 9 are arranged on the top of each group of connecting seats 10, and the blades 9 are rotatably connected to the connecting seat 10, a handle 5 is arranged on the top of the blade 9, and a knife clamp 7 is arranged on the back of the blade 9, and a protective cover 3 is arranged on the bottom of the front of the front cover 4, and the protective cover 3 is threadedly connected to the front cover 4, and two groups of slots aligned with the blade 9 are arranged on the front of the protective cover 3, and the protective cover 3 prevents the user from accidentally touching the blade 9 or the wiring screw 6 when operating the handle 5 to cause the risk of contact, and the protective cover 3 can reduce the dust falling on the surface of the knife clamp 7 and the blade 9, and avoid the contact part of the knife clamp 7 and the blade 9 due to excessive dust, resulting in poor contact of the two groups, thereby affecting the normal use of the contactor.

[0027] In summary:

[0028] A handle 5, a wiring screw 6, a knife clamp 7, a fastening screw 8, a knife blade 9, and a connecting seat 10 are used. The fastening screw 8 fixes the connecting seat 10 to the surface of the front cover 4. The wiring screw 6 fastens the wire of the control circuit to the connecting seat 10. The knife clamp 7 is electrically connected to the coil 16. The handle 5 drives the knife blade 9 to rotate around the connecting seat 10. When the knife blade 9 moves to the inside of the knife clamp 7, the control circuit is connected, thereby realizing rapid opening and closing of the contactor circuit. The user does not need to move a long distance to control the switch, thereby improving the efficiency of contactor debugging and detection. In addition, since the control switch is cancelled, the number of wire segments of the control circuit is reduced. When a control circuit fails, it is easier to repair.

[0029] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0030] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A low electromagnetic interference high efficiency contactor, comprising a front cover (4), characterized in that: The front face of the front cover (4) is provided with two groups of connecting seats (10), the connecting seats (10) are T-shaped, one side of the front face of the connecting seats (10) is provided with a wiring screw (6), the other side of the front face of the connecting seats (10) is provided with a fastening screw (8), each group of the connecting seats (10) is provided with a group of blades (9) on the top, the blades (9) are rotatably connected to the connecting seats (10), the top of the blades (9) is provided with a handle (5), the handle (5) is T-shaped, the back of the blades (9) is provided with a blade clamp (7), the blade clamp (7) is U-shaped, the inner wall of the blade clamp (7) is in close contact with the outer side of the blade (9), and the back of the front cover (4) is provided with a contactor housing (2).

2. A low electromagnetic interference high efficiency contactor according to claim 1, characterized in that: The contactor housing (2) is threadedly connected to the front cover (4), and the edges of the contactor housing (2) and the front cover (4) are both rounded.

3. A low electromagnetic interference high efficiency contactor according to claim 1, characterized in that: A protective cover (3) is provided at the bottom of the front face of the front cover (4), the protective cover (3) is threadedly connected to the front cover (4), and two groups of slots aligned with the blade (9) are provided on the front face of the protective cover (3).

4. A low electromagnetic interference high efficiency contactor according to claim 1, characterized in that: A fixed iron core (17) is provided inside the contactor housing (2), the fixed iron core (17) is fixedly connected to the contactor housing (2), the fixed iron core (17) is E-shaped, and a coil (16) is provided inside the fixed iron core (17).

5. A low electromagnetic interference high efficiency contactor according to claim 4, characterized in that: An RC filter circuit (15) is provided on one side of the front face of the coil (16); the front face of the RC filter circuit (15) is electrically connected to a group of tool clamps (7); and the other side of the front face of the coil (16) is electrically connected to another group of tool clamps (7).

6. A low electromagnetic interference high efficiency contactor according to claim 4, characterized in that: A spring (14) is provided on the top of the coil (16), and a movable iron core (13) is provided on the top of the spring (14). The movable iron core (13) has the same shape as the fixed iron core (17).

7. A low electromagnetic interference high efficiency contactor according to claim 6, characterized in that: Two groups of fixed contacts (12) are provided on the top of the movable iron core (13), two groups of movable contacts (11) are provided on the top of the two groups of fixed contacts (12), a controlled circuit terminal (1) is provided on one side of the top of the fixed contact (12), and the top of the controlled circuit terminal (1) passes through the top of the contactor housing (2).

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