Direct current contactor with good electromagnetic compatibility

Abstract

The utility model provides a direct-current contactor with good electromagnetic compatibility, which belongs to the technical field of direct-current contactors, and aims to solve the problem that a hand movement space is often very crowded during maintenance due to the structural limitation that a back plate of the conventional direct-current contactor is tightly attached to external equipment. The two fixed guide rails are dispersedly and fixedly connected to the front surface of the fixed plate; the two fixed boxes are dispersedly and fixedly connected to the front surface of the fixed plate; the convenient wiring assembly is arranged in front of the fixing plate; and the two sets of components convenient to disassemble are arranged in the two fixing boxes correspondingly. According to the utility model, the shell of the contactor main body is made of a ferrite material, the electromagnetic compatibility is improved, the contactor main body can move forwards to provide a larger space for wiring operation, the contactor main body and the mounting back plate can be separated by pulling the connecting ring, and the efficiency is higher when overall maintenance is needed.

Description

Technical Field

[0001] This utility model belongs to the field of DC contactor technology, and more specifically, it relates to a DC contactor with good electromagnetic compatibility. Background Technology

[0002] DC contactors play an important role in the field of DC circuit control. They are widely used in various industries such as electric locomotives, industrial automation, electric vehicles, and shipbuilding to control the starting, stopping, speed regulation of DC motors, and the switching on and off of circuits. Existing DC contactors generally consist of a housing, terminals, electromagnetic mechanism, contact system, arc extinguishing mechanism, and reaction mechanism.

[0003] Existing application number: CN201520871360.9, discloses a DC contactor, including a yoke assembly, a coil assembly placed inside the yoke assembly, an iron core placed inside the coil assembly, a base plate assembly above the yoke assembly, a mounting back plate connected to the base plate assembly, a seat plate assembly above the mounting back plate assembly, a stationary contact piece assembly fixed above the seat plate assembly, a core rod or screw disposed in a hole in the middle of the seat plate assembly, a contact spring connected to the core rod or screw via a core rod slot or a self-locking nut, a bushing above the contact spring, a moving contact assembly and a return spring seat disposed on the bushing, a return spring seat connected to the return spring, and a cap covering the return spring. Compared to the prior art, this utility model adopts a modular design, which can reduce the size, save space, and simplify assembly. By placing the coil lead wire terminals and the main circuit wiring screws in different areas, it is convenient for users and greatly improves reliability.

[0004] Based on the above, the main body of a DC contactor is generally connected to other equipment by bolts on the back plate of the housing. When it is necessary to repair the DC contactor or to perform wiring operations on its terminals, due to the structural limitation of the back plate being tightly attached to the external equipment, the operator often encounters the problem of very cramped hand space. Sometimes, the operator even has to remove the bolts on the back plate of the housing one by one and then disassemble the DC contactor as a whole before continuing the subsequent operation, which is very cumbersome. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides a DC contactor with good electromagnetic compatibility. This solves the problem that existing DC contactors typically connect to other equipment via bolts on the backplate of the housing. When maintenance or wiring operations are required, the tight fit between the backplate and external equipment often restricts hand movement, making it extremely cumbersome. Operators sometimes have to remove each bolt from the backplate individually before disassembling the entire contactor to continue operations.

[0006] The purpose and effect of this utility model, which provides a DC contactor with good electromagnetic compatibility, are achieved through the following specific technical means:

[0007] A DC contactor with good electromagnetic compatibility, including a mounting backplate;

[0008] The mounting bolts are provided in two pieces, and the two mounting bolts are connected by distributed threads inside the mounting back plate;

[0009] Two connectors are provided, and the two connectors are separately inserted into the top of the mounting back plate;

[0010] A fixing plate is fixedly connected to the front end of the two connecting pieces;

[0011] The contactor body is disposed in front of the fixed plate;

[0012] The contactor body has four terminals, which are fixedly connected to the top of the contactor body in a distributed manner.

[0013] The fixed guide rail is provided in two pieces, which are separately and fixedly connected to the front of the fixed plate.

[0014] The fixing box is provided in two pieces, which are separately and fixedly connected to the front of the fixing plate;

[0015] A wiring-friendly assembly is provided in front of the fixed plate;

[0016] The components are designed to be easily disassembled. Two sets of these components are provided, and each set is located inside one of the two fixed boxes.

[0017] Furthermore, the wiring-friendly assembly includes:

[0018] The slider is provided in two parts, which are respectively fixedly connected to the left and right sides of the contactor body, and are respectively slidably connected inside two fixed guide rails.

[0019] A lead screw is rotatably connected inside a fixed guide rail on the right side, and the lead screw is threadedly connected to a slider on the right side.

[0020] An operating knob is coaxially and fixedly connected to the front end of the transmission screw.

[0021] Furthermore, the wiring-friendly assembly also includes:

[0022] The first cap is provided in two pieces, and the two first caps are respectively threaded to the top of the two terminals on the right side;

[0023] The second cap is provided in two parts, and the two second caps are respectively threaded to the top of the two terminals on the left side.

[0024] Furthermore, the easily disassembled components include:

[0025] A sliding plate, which is slidably connected inside the fixed box;

[0026] A connecting column is fixedly connected to the front of the sliding plate and slidably connected to the right end of the fixed box;

[0027] A connecting ring is fixedly connected to the front end of the connecting post.

[0028] Furthermore, the easily disassembleable component also includes:

[0029] An insertion post is fixedly connected to the back of the sliding plate;

[0030] A fixing groove is formed inside the connector.

[0031] Furthermore, the easily disassembleable component also includes:

[0032] A reset spring is provided, with its rear end fixedly connected to the front of the sliding plate and its front end fixedly connected to the inside of the fixed box.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] First, the contactor body shell is made of ferrite material, which has better electromagnetic compatibility. When it is necessary to connect or disconnect the terminals, the position of the contactor body can be moved forward, giving the operator more room to move their hands and making operation easier. At the same time, the setting of the first and second caps can, to a certain extent, prevent the terminals from being connected to the inlet and outlet terminals of external equipment in reverse.

[0035] Secondly, by pulling the two connecting rings forward, the contactor body can be moved upward, separating the contactor body, fixing plate, and two connecting parts from the mounting back plate. This makes the operation faster and more convenient when the contactor body needs to be overhauled.

[0036] The contactor body housing of this utility model is made of ferrite material, which improves electromagnetic compatibility. The contactor body can be moved forward to provide more space for wiring operations of the terminals. The contactor body can be separated from the mounting back plate by pulling the connecting ring. When overall maintenance is required, separation and installation can be carried out more quickly, thus speeding up maintenance efficiency. Attached Figure Description

[0037] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0038] Figure 2 This is a schematic diagram of the mounting backplate structure of this utility model.

[0039] Figure 3 This is a schematic diagram of the main structure of the contactor of this utility model.

[0040] Figure 4 This is a schematic diagram of the fixing plate structure of this utility model.

[0041] Figure 5 This is a schematic diagram of the fixing box structure of this utility model.

[0042] Figure 6 This is a schematic diagram of the connector structure of this utility model.

[0043] In the diagram, the correspondence between component names and drawing numbers is as follows:

[0044] 1. Backplate; 101. Mounting bolt; 2. Connector; 201. Fixing plate; 202. Fixing groove; 3. Contactor body; 301. Terminal block; 4. Fixing guide rail; 5. Slider; 6. Drive screw; 601. Operating knob; 7. First cap; 8. Second cap; 9. Fixing box; 10. Sliding plate; 1001. Connecting post; 1002. Connecting ring; 1003. Insertion post; 1004. Return spring. Detailed Implementation

[0045] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0046] Example 1:

[0047] As attached Figure 1 To be continued Figure 6 As shown:

[0048] This utility model provides a DC contactor with good electromagnetic compatibility, including a mounting backplate 1;

[0049] Mounting bolt 101, two mounting bolts 101 are provided, and the two mounting bolts 101 are connected in a distributed threaded connection inside the mounting back plate 1;

[0050] Connector 2, two connectors 2 are provided, and the two connectors 2 are inserted into the top of the mounting back plate 1 respectively;

[0051] Fixing plate 201 is fixedly connected to the front end of the two connecting pieces 2;

[0052] Contactor body 3, the contactor body 3 is located in front of the fixed plate 201;

[0053] Four terminal blocks 301 are provided, and the four terminal blocks 301 are distributed and fixedly connected to the top of the contactor body 3.

[0054] Two fixed guide rails 4 are provided, and the two fixed guide rails 4 are separately and fixedly connected to the front of the fixed plate 201.

[0055] Two fixing boxes 9 are provided, and the two fixing boxes 9 are separately and fixedly connected to the front of the fixing plate 201.

[0056] The wiring assembly is conveniently located in front of the mounting plate 201.

[0057] The components that facilitate wiring include:

[0058] Slider 5, two sliders 5 are provided, the two sliders 5 are fixedly connected to the left and right sides of the contactor body 3 respectively, and the two sliders 5 are slidably connected inside the two fixed guide rails 4 respectively;

[0059] The transmission screw 6 is rotatably connected inside the fixed guide rail 4 on the right side, and the transmission screw 6 is threadedly connected to the slider 5 on the right side.

[0060] The operating knob 601 is coaxially fixed to the front end of the transmission screw 6. Its function is that by rotating the operating knob 601, the contactor body 3 can be moved back and forth under the action of the threaded transmission mechanism formed by the transmission screw 6 and the slider 5 on the right.

[0061] The wiring assembly also includes:

[0062] The first cap 7 is provided in two pieces, and the two first caps 7 are respectively threaded to the top of the two terminals 301 on the right side.

[0063] The second cap 8 has two parts, which are threaded to the top of the two terminals 301 on the left side. The function of the second cap 8 is to reduce the probability of the nuts on the outside of the four terminals 301 falling off upwards. At the same time, the top of the first cap 7 and the second cap 8 are marked to avoid the inlet and outlet terminals being connected in reverse.

[0064] The specific usage and function of this embodiment are as follows:

[0065] During use, the mounting backplate 1 is fixed to the external equipment using mounting bolts 101. The outer shell of the contactor body 3 is made of ferrite material. As a magnetic material, ferrite has a certain ability to shield magnetic fields. When the contactor body 3 is in a complex electromagnetic environment, the ferrite shell can effectively reduce the interference of external magnetic fields on the internal electrical components of the contactor, thereby improving the electromagnetic compatibility of the contactor body 3. When it is necessary to connect or disconnect the terminal 301, if the back of the contactor body 3 is too close to the external equipment and the operating space is relatively narrow, the operating knob can be rotated. Button 601, under the action of the threaded transmission mechanism formed by the transmission screw 6 and the slider 5 on the right, can drive the contactor body 3 to move forward, thus giving the operator's hands more room to move. Then, first unscrew the first cap 7 or the second cap 8 from the top of the terminal 301. The top of the first cap 7 and the second cap 8 are marked to avoid the inlet and outlet terminals being connected in reverse. After the wiring is completed, the first cap 7 and the second cap 8 can be put back on the top of the terminal 301, which reduces the probability that the nuts on the outside of the four terminals 301 will fall off upward due to external vibration.

[0066] Example 2:

[0067] Based on Example 1, as shown in the appendix Figure 1 To be continued Figure 6 As shown, it also includes a component for easy disassembly, with two sets of components for easy disassembly, each set being installed inside one of the two fixed boxes 9.

[0068] Among them, the components that are easy to split include:

[0069] Sliding plate 10 is slidably connected inside the fixed box 9;

[0070] Connecting post 1001 is fixedly connected to the front of sliding plate 10 and slidably connected to the right end of fixed box 9.

[0071] The connecting ring 1002 is fixedly connected to the front end of the connecting post 1001. Its function is that pulling the connecting ring 1002 forward can drive the sliding plate 10 and the connecting post 1001 to move forward synchronously.

[0072] The components that facilitate disassembly also include:

[0073] Insert post 1003 is fixedly connected to the rear of sliding plate 10;

[0074] The fixing groove 202 is opened inside the connector 2. Its function is that when the sliding plate 10 moves forward, it can drive the insertion post 1003 to disengage from the fixing groove 202, thereby allowing the contactor body 3 to move upward and separate the contactor body 3, the fixing plate 201, and the two connectors 2 from the mounting back plate 1.

[0075] The components that facilitate disassembly also include:

[0076] The return spring 1004 is fixedly connected at its rear end to the front of the sliding plate 10 and at its front end to the inside of the fixing box 9. Its function is to release the connecting ring 1002, and the return spring 1004 will rebound, causing the sliding plate 10 and the insertion post 1003 to move backward, and the insertion post 1003 will be inserted into the fixing groove 202.

[0077] The specific usage and function of this embodiment are as follows:

[0078] If the contactor body 3 needs to be removed for maintenance, first remove the cable from the top of the terminal block 301, then simultaneously pull the two connecting rings 1002 forward. This will cause the sliding plate 10 and the connecting post 1001 to move forward synchronously. The forward movement of the sliding plate 10 will cause the insertion post 1003 to disengage from the fixed groove 202, thereby allowing the contactor body 3 to move upward and separate the contactor body 3, the fixed plate 201, and the two connecting pieces 2 from the mounting back plate 1. After maintenance, pull the two connecting rings 1002 forward again, then insert the connecting piece 2 into the top of the mounting back plate 1. After that, release the connecting rings 1002, and the return spring 1004 will rebound, causing the sliding plate 10 and the insertion post 1003 to move backward. The insertion post 1003 will then insert into the fixed groove 202, completing the fixation.

[0079] The following points should be noted in this article:

[0080] 1. The accompanying drawings of the embodiments disclosed herein only relate to the structures involved in the embodiments disclosed herein; other structures can be referred to in general design.

[0081] 2. Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0082] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A DC contactor with good electromagnetic compatibility, comprising a mounting backplate, mounting bolts, connectors, a fixing plate, a contactor body, terminals, a fixing rail, a fixing box, a wiring assembly, and a disassembly assembly; characterized in that: The two mounting bolts are threadedly connected inside the mounting back plate; the two connectors are inserted into the top of the mounting back plate; the fixing plate is fixedly connected to the front end of the two connectors; the contactor body is located in front of the fixing plate. The four terminals are fixedly connected to the top of the contactor body; the two fixed rails are fixedly connected to the front of the fixed plate; the two fixed boxes are fixedly connected to the front of the fixed plate; the wiring assembly is located in front of the fixed plate; and the two sets of disassembly assemblies are respectively located inside the two fixed boxes.

2. The DC contactor with good electromagnetic compatibility as described in claim 1, characterized in that: The wiring assembly includes: a slider, a lead screw, and an operating knob; two sliders are provided, which are fixedly connected to the left and right sides of the contactor body, and are slidably connected inside two fixed guide rails; the lead screw is rotatably connected inside the right fixed guide rail, and is threadedly connected to the right slider; the operating knob is coaxially fixedly connected to the front end of the lead screw.

3. The DC contactor with good electromagnetic compatibility as described in claim 2, characterized in that: The wiring assembly further includes: a first cap and a second cap; two first caps are provided, and the two first caps are respectively threaded to the top of the two terminals on the right side; two second caps are provided, and the two second caps are respectively threaded to the top of the two terminals on the left side.

4. The DC contactor with good electromagnetic compatibility as described in claim 1, characterized in that: The easily disassembleable component includes: a sliding plate, a connecting post, and a connecting ring; the sliding plate is slidably connected inside the fixed box. The connecting post is fixedly connected to the front of the sliding plate, and the connecting post is slidably connected to the right end of the fixed box; the connecting ring is fixedly connected to the front end of the connecting post.

5. The DC contactor with good electromagnetic compatibility as described in claim 4, characterized in that: The easily disassembled component also includes: an insertion post and a fixing groove; the insertion post is fixedly connected to the back of the sliding plate; the fixing groove is formed inside the connector.

6. The DC contactor with good electromagnetic compatibility as described in claim 5, characterized in that: The easily disassembled component also includes a reset spring; the rear end of the reset spring is fixedly connected to the front of the sliding plate, and the front end of the reset spring is fixedly connected to the inside of the fixing box.

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