Electromagnetic shielding device for current sensor

Abstract

The utility model relates to current sensor technical field, concretely is a kind of electromagnetic shielding device for current sensor, including hall current sensor, wiring terminal, copper bar and shielding mechanism, wiring terminal is fixedly connected with hall current sensor, shielding mechanism is set on the surface of hall current sensor;Shielding mechanism includes shielding shell, shielding shell is sleeved on the surface of hall current sensor, the inner wall of shielding shell is slidably connected with slide bar, the surface of slide bar is fixedly connected with movable shell, the surface of slide bar is fixedly connected with spring one, spring one is fixedly connected with the inner wall of shielding shell, and the surface of movable shell is provided with wiring slot;The surface of hall current sensor is fixedly connected with positioning block.The utility model, by setting shielding mechanism, electromagnetic shielding is carried out to hall current sensor using shielding shell and movable shell, and it is different from traditional bolt connection, and the whole dismounting operation process is more time-saving and labor-saving, and the convenience of equipment is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of current sensor technology, and in particular to an electromagnetic shielding device for current sensors. Background Technology

[0002] Hall effect current sensors are a type of current sensor. When in use, if there is strong magnetic field interference nearby, the output of the Hall effect sensor will be unstable. Therefore, it is necessary to use an aluminum shell or an aluminum oxide coating to electromagnetically shield it.

[0003] Existing technologies, such as Chinese Patent Publication No. CN221883731U, disclose a Hall current sensor shielding and protection box, including a Hall current sensor body. The Hall current sensor body has symmetrical mounting holes on both sides, and a socket is located in the middle of one side of the Hall current sensor body, penetrating to the other side. The main body shell, side plate one, and side plate two can cover the outside of the Hall current sensor body to shield and protect it, preventing signal interference from other nearby modules. Dustproof sleeves can cover the copper busbars at both ends of the Hall current sensor body, sealing the connection gap between the copper busbars and the socket, preventing dust from entering the socket through the gap, and preventing dust from adhering to and covering the outside of the copper busbars, thus preventing the Hall current sensor from sensing the current in the copper busbars and preventing data errors. However, this utility model requires a slider to be inserted into the limiting port for installation of the main body shell, and screws to be used to install the side plate two between the main body shell and the dustproof components between the side plate one and side plate two, making the entire assembly and disassembly process cumbersome, time-consuming, and labor-intensive.

[0004] To address the issue that electromagnetic shielding devices for current sensors are not easy to install and remove quickly and effortlessly, existing electromagnetic shielding devices for current sensors mostly use the traditional bolt connection method for installation. Furthermore, due to the protruding wiring terminals, installation may require two steps to completely surround the shield, making the entire installation and removal process time-consuming and labor-intensive. Therefore, improvements are needed. Utility Model Content

[0005] The purpose of this invention is to solve the problem that electromagnetic shielding devices for current sensors in the prior art are not convenient to install and remove quickly and effortlessly, and to propose an electromagnetic shielding device for current sensors.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an electromagnetic shielding device for a current sensor, comprising a Hall current sensor, a terminal block, a copper busbar, and a shielding mechanism, wherein the terminal block is fixedly connected to the Hall current sensor, and the shielding mechanism is disposed on the surface of the Hall current sensor; The shielding mechanism includes a shielding shell, which is fitted onto the surface of the Hall current sensor. A sliding rod is slidably connected to the inner wall of the shielding shell. A movable shell is fixedly connected to the surface of the sliding rod. A spring is fixedly connected to the surface of the sliding rod and is fixedly connected to the inner wall of the shielding shell. A wiring groove is provided on the surface of the movable shell. A positioning block is fixedly connected to the surface of the Hall current sensor, a positioning groove is formed on the surface of the movable shell, the positioning block is slidably connected to the surface of the positioning groove, a slot is formed on the surface of the positioning block, and a locking block is slidably connected to the inner wall of the movable shell, the locking block is locked to the surface of the locking groove.

[0007] Furthermore, a second spring is fixedly connected to the surface of the locking block, and the second spring is fixedly connected to the inner wall of the movable shell. The number of the sliding rod, the first spring, the positioning block, the positioning groove, the locking block, the locking groove, and the second spring are all two sets.

[0008] Furthermore, a pull plate is fixedly connected to the surface of the card block, the pull plate is slidably connected to the inner wall of the movable shell, and the surface of the card block is provided with an arc surface.

[0009] Furthermore, the surfaces of the Hall current sensor, the shielding shell, and the movable shell are all provided with clearance grooves, and the copper busbar is inserted inside the clearance grooves.

[0010] Furthermore, both the shielding shell and the movable shell are provided with a dustproof mechanism. The dustproof mechanism includes a fixed frame and a mounting frame. There are two sets of fixed frames, which are fixedly connected to the surfaces of the shielding shell and the movable shell respectively. A dustproof sleeve is fixedly connected to the surface of the mounting frame.

[0011] Furthermore, the inner wall of the fixing frame is slidably connected with a plug rod, the surface of the mounting frame is provided with a plug hole, the plug rod is inserted and connected to the surface of the plug hole, there are two sets of plug rods and plug holes, and a pull plate is fixedly connected to the surface of the plug rod.

[0012] Furthermore, a spring three is sleeved and connected to the surface of the insertion rod. One end of the spring three is fixedly connected to the surface of the pull plate, and the other end of the spring three is fixedly connected to the surface of the fixing frame. An elastic collar is sleeved and connected to the surface of the dust cover, and there are multiple elastic collars.

[0013] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, a shielding mechanism is set up to electromagnetically shield the Hall current sensor using a shielding shell and a movable shell. During installation, simply pull the movable shell away from the shielding shell to slide the sliding rod and tighten the first spring to avoid the wiring terminals affecting the installation. Then, slide the shielding shell over the Hall current sensor until the positioning block aligns with the positioning groove. Release the movable shell, and under the rebound of the first spring, the movable shell returns to its original position, the positioning block is inserted into the positioning groove, and the wiring terminals are inserted into the wiring groove. During this process, the positioning block contacts the arc surface and squeezes the locking block into the inner wall of the movable shell, pressing the second spring until the locking block aligns with the slot. Under the rebound of the second spring, the locking block is inserted into the slot, achieving a stable connection. When disassembly is required, simply pull the two sets of pull plates to disengage the locking block from the slot, and then pull the movable shell to disengage the wiring terminals from the wiring groove, and the shielding shell can be removed upwards. By setting up a shielding mechanism, the Hall current sensor is electromagnetically shielded using a shielding shell and a movable shell, which is different from traditional bolt connections. The entire installation and disassembly process is more time-saving and labor-saving, effectively improving the convenience of the equipment.

[0014] 2. In this utility model, by setting up a dustproof mechanism, the dustproof sleeve is used to seal the copper busbar and the relief groove for dust prevention. Multiple elastic rings can be fitted on the dustproof sleeve, and their deformation makes the dustproof sleeve press against the copper busbar to ensure sufficient sealing. When the dustproof sleeve needs to be replaced or maintained, simply pull the two sets of pull plates to disengage the insertion rod from the insertion hole and tighten the spring three to remove the mounting bracket and dustproof sleeve. During installation, simply insert the mounting bracket into the fixing bracket, align the insertion rod with the insertion hole, release the pull plate, and the insertion rod will be inserted into the insertion hole under the return action of the spring three to complete the fixation. By setting up a dustproof mechanism, the deformation of the dustproof sleeve and elastic rings can be used to seal the copper busbar and the relief groove for dust prevention. The dustproof sleeve is easy to install and remove for replacement and maintenance, which effectively improves the convenience of the equipment. Attached Figure Description

[0015] Figure 1 This utility model provides a three-dimensional structural schematic diagram of an electromagnetic shielding device for a current sensor; Figure 2 This utility model provides a cross-sectional structural diagram of the shielding mechanism in an electromagnetic shielding device for a current sensor. Figure 3 This utility model proposes an electromagnetic shielding device for a current sensor. Figure 2 A magnified structural diagram at point A; Figure 4 This utility model provides a cross-sectional structural diagram of the dustproof mechanism in an electromagnetic shielding device for a current sensor. Figure 5 This utility model proposes an electromagnetic shielding device for a current sensor. Figure 4 A magnified structural diagram at point B.

[0016] Legend: 1. Hall current sensor; 2. Terminal block; 3. Copper busbar; 4. Shielding mechanism; 401. Shielding shell; 402. Sliding rod; 403. Movable shell; 404. Spring 1; 405. Wiring groove; 406. Positioning block; 407. Positioning groove; 408. Locking block; 409. Locking groove; 410. Spring 2; 411. Pull plate; 412. Curved surface; 413. Leaving groove; 5. Dustproof mechanism; 51. Fixing bracket; 52. Mounting bracket; 53. Dustproof cover; 54. Insert rod; 55. Insertion hole; 56. Pull plate; 57. Spring 3; 58. Elastic collar. Detailed Implementation

[0017] Please see Figures 1-5 This utility model provides a technical solution: an electromagnetic shielding device for a current sensor, including a Hall current sensor 1, a terminal block 2, a copper busbar 3 and a shielding mechanism 4. The terminal block 2 is fixedly connected to the Hall current sensor 1, and the shielding mechanism 4 is disposed on the surface of the Hall current sensor 1.

[0018] The following section will explain the specific setup and function of its shielding mechanism 4 and dustproof mechanism 5.

[0019] In this embodiment: the shielding mechanism 4 includes a shielding shell 401, which is sleeved on the surface of the Hall current sensor 1. A slide rod 402 is slidably connected to the inner wall of the shielding shell 401. A movable shell 403 is fixedly connected to the surface of the slide rod 402. A spring 404 is fixedly connected to the surface of the slide rod 402. The spring 404 is fixedly connected to the inner wall of the shielding shell 401. A wiring groove 405 is provided on the surface of the movable shell 403. A positioning block 406 is fixedly connected to the surface of the Hall current sensor 1. A positioning groove 407 is provided on the surface of the movable shell 403. The positioning block 406 is slidably connected to the surface of the positioning groove 407. A slot 409 is provided on the surface of the positioning block 406. A locking block 408 is slidably connected to the inner wall of the movable shell 403. The locking block 408 is locked to the surface of the slot 409.

[0020] The effects achieved by the above components are as follows: The shielding shell 401 and movable shell 403 are provided to facilitate mounting onto the Hall current sensor 1 for electromagnetic shielding. The sliding rod 402 and spring 404 are provided to prevent the protruding terminal 2 from obstructing downward mounting during installation. Pulling the movable shell 403 causes the sliding rod 402 to slide along the inner wall of the shielding shell 401 and tighten the spring 404. After mounting, releasing the movable shell 403 allows the sliding rod 402 to return to its original position due to the rebound of the spring 404. The wiring slot 405 is designed to allow the terminal 2 to be inserted into the wiring slot 405 when the movable housing 403 is reset, facilitating wiring. The positioning block 406 and the positioning slot 407 are designed to ensure that when the positioning slot 407 is aligned with the positioning block 406, the wiring slot 405 and the terminal 2 are also aligned, preventing damage to the terminal 2 caused by misalignment of the wiring slot 405 and the terminal 2 when the movable housing 403 is reset. The locking block 408 and the locking slot 409 are designed to facilitate fixing the movable housing 403 and the shielding housing 401 onto the Hall current sensor 1.

[0021] Specifically, spring 410 is fixedly connected to the surface of the locking block 408. Spring 410 is fixedly connected to the inner wall of the movable shell 403. There are two sets of sliding rod 402, spring 404, positioning block 406, positioning groove 407, locking block 408, locking groove 409 and spring 410.

[0022] The effects achieved by the above components are as follows: the second spring 410 is set so that the locking block 408 can be locked in the slot 409, and its rebound effect can be used to facilitate the reset of the locking block 408. The two sets of locking blocks 408 and slots 409 are set so that the shielding shell 401 and the movable shell 403 can be removed only when both sets of locking blocks 408 are disengaged from the slots 409, thus avoiding accidental contact.

[0023] Specifically, a pull plate 411 is fixedly connected to the surface of the locking block 408, and the pull plate 411 is slidably connected to the inner wall of the movable shell 403. The surface of the locking block 408 is provided with an arc surface 412.

[0024] The effects achieved by the above components are as follows: the pull plate 411 is set to facilitate pulling the locking block 408 to disengage it from the slot 409; the arc surface 412 is set so that when the movable shell 403 is reset, the positioning block 406 can push the locking block 408 into the inner wall of the movable shell 403 and press the second spring 410 during the contact process of the arc surface 412 until the locking block 408 is aligned with the slot 409. Under the rebound action of the second spring 410, the locking block 408 can be locked into the slot 409, without the need to manually slide the locking block 408 into the inner wall of the movable shell 403 during installation.

[0025] Specifically, the Hall current sensor 1, the shielding shell 401, and the movable shell 403 are all provided with relief grooves 413, and the copper busbar 3 is inserted into the relief grooves 413.

[0026] The effect achieved by the above components is that the clearance groove 413 is provided to facilitate the insertion and placement of the copper busbar 3.

[0027] Specifically, both the shielding shell 401 and the movable shell 403 are provided with a dustproof mechanism 5. The dustproof mechanism 5 includes a fixed frame 51 and a mounting frame 52. There are two sets of fixed frames 51, which are fixedly connected to the surfaces of the shielding shell 401 and the movable shell 403 respectively. A dustproof sleeve 53 is fixedly connected to the surface of the mounting frame 52.

[0028] The effects achieved by the above components are as follows: the fixed bracket 51 and the mounting bracket 52 are provided to facilitate the installation of the dust cover 53 on the shielding shell 401 and the movable shell 403, and the dust cover 53 is provided to facilitate the sealing and dust prevention of the copper busbar 3 and the relief groove 413.

[0029] Specifically, the inner wall of the fixing frame 51 is slidably connected with a plug rod 54, the surface of the mounting frame 52 is provided with a plug hole 55, the plug rod 54 is inserted and connected to the surface of the plug hole 55, there are two sets of plug rods 54 and plug holes 55, and a pull plate 56 is fixedly connected to the surface of the plug rod 54.

[0030] The effects achieved by the above components are as follows: the insertion rod 54 and the insertion hole 55 are provided to facilitate fixing the mounting bracket 52 to the fixing bracket 51; the two sets of insertion rods 54 and insertion holes 55 are provided to ensure that the mounting bracket 52 and the dust cover 53 can be removed only when both sets of insertion rods 54 are detached from the insertion hole 55, thus avoiding accidental contact; the pull plate 56 is provided to facilitate pulling the insertion rod 54 to detach it from the insertion hole 55.

[0031] Specifically, a spring 57 is sleeved and connected to the surface of the insertion rod 54. One end of the spring 57 is fixedly connected to the surface of the pull plate 56, and the other end of the spring 57 is fixedly connected to the surface of the fixing bracket 51. An elastic collar 58 is sleeved and connected to the surface of the dust cover 53. There are multiple elastic collars 58.

[0032] The effects achieved by the above components are as follows: the spring 57 is set so that the insertion rod 54 can be locked into the insertion hole 55, and its rebound effect can be used to facilitate the reset of the insertion rod 54; the multiple elastic collars 58 are set so that they can be put on the dust cover 53, and their elastic deformation can be used to make the dust cover 53 press against the copper busbar 3, thereby improving the sealing effect.

[0033] Working principle: By setting up the shielding mechanism 4, the Hall current sensor 1 is electromagnetically shielded by the shielding shell 401 and the movable shell 403. During installation, simply pull the movable shell 403 away from the shielding shell 401, so that the slide rod 402 slides and tightens the spring 404, avoiding the wiring terminal 2 from affecting the installation. Then, slide the shielding shell 401 over the Hall current sensor 1 until the positioning block 406 is aligned with the positioning groove 407. Release the movable shell 403, and the movable shell 403 will return to its original position under the rebound of the spring 404. The positioning block 406 will then be engaged in the positioning groove 407, and the wiring terminal 2 will be engaged in the wiring groove 405. During this process, the positioning block 406 will contact the arc surface 412. The locking block 408 is pressed into the inner wall of the movable shell 403, and the second spring 410 is pressed until the locking block 408 is aligned with the slot 409. Under the rebound action of the second spring 410, the locking block 408 is locked into the slot 409, achieving a stable connection. When disassembly is required, simply pull the two sets of pull plates 411 to disengage the locking block 408 from the slot 409, and then pull the movable shell 403 to disengage the terminal 2 from the wiring slot 405. The shielding shell 401 can then be removed upwards. By setting the shielding mechanism 4, the Hall current sensor 1 is electromagnetically shielded by the shielding shell 401 and the movable shell 403. Unlike the traditional bolt connection, the entire loading and unloading operation is more time-saving and labor-saving, which effectively improves the convenience of the equipment.

[0034] Furthermore, by setting up a dustproof mechanism 5, the dustproof sleeve 53 is used to seal the copper busbar 3 and the relief groove 413 for dust prevention. Multiple elastic collars 58 can be fitted on the dustproof sleeve 53, and their deformation can be used to make the dustproof sleeve 53 press against the copper busbar 3 to ensure sufficient sealing. When the dustproof sleeve 53 needs to be replaced or maintained, simply pull the two sets of pull plates 56 to disengage the insertion rod 54 from the insertion hole 55 and tighten the spring three 57 to remove the mounting bracket 52 and the dustproof sleeve 53. During installation, simply insert the mounting bracket 52 into the fixing bracket 51, align the insertion rod 54 with the insertion hole 55, release the pull plate 56, and the insertion rod 54 will be inserted into the insertion hole 55 under the rebound action of the spring three 57 to complete the fixation. By setting up the dustproof mechanism 5, the deformation of the dustproof sleeve 53 and the elastic collars 58 can be used to seal the copper busbar 3 and the relief groove 413 for dust prevention. Moreover, the dustproof sleeve 53 is easy to install and remove for replacement and maintenance, which effectively improves the convenience of the equipment.

Claims

1. An electromagnetic shielding device for a current sensor, comprising a Hall current sensor (1), a terminal block (2), a copper busbar (3), and a shielding mechanism (4), characterized in that: The terminal block (2) is fixedly connected to the Hall current sensor (1), and the shielding mechanism (4) is disposed on the surface of the Hall current sensor (1); The shielding mechanism (4) includes a shielding shell (401), which is sleeved on the surface of the Hall current sensor (1). A slide rod (402) is slidably connected to the inner wall of the shielding shell (401). A movable shell (403) is fixedly connected to the surface of the slide rod (402). A spring (404) is fixedly connected to the surface of the slide rod (402). The spring (404) is fixedly connected to the inner wall of the shielding shell (401). A wiring groove (405) is opened on the surface of the movable shell (403). A positioning block (406) is fixedly connected to the surface of the Hall current sensor (1). A positioning groove (407) is provided on the surface of the movable shell (403). The positioning block (406) is slidably connected to the surface of the positioning groove (407). A slot (409) is provided on the surface of the positioning block (406). A locking block (408) is slidably connected to the inner wall of the movable shell (403). The locking block (408) is locked to the surface of the slot (409).

2. The electromagnetic shielding device for a current sensor according to claim 1, characterized in that: The surface of the locking block (408) is fixedly connected to a second spring (410), and the second spring (410) is fixedly connected to the inner wall of the movable shell (403). The number of the slide rod (402), the first spring (404), the positioning block (406), the positioning groove (407), the locking block (408), the slot (409), and the second spring (410) are all two sets.

3. The electromagnetic shielding device for a current sensor according to claim 1, characterized in that: A pull plate (411) is fixedly connected to the surface of the card block (408), and the pull plate (411) is slidably connected to the inner wall of the movable shell (403). The surface of the card block (408) is provided with an arc surface (412).

4. The electromagnetic shielding device for a current sensor according to claim 1, characterized in that: The Hall current sensor (1), shielding shell (401), and movable shell (403) are all provided with relief grooves (413), and the copper busbar (3) is inserted into the relief grooves (413).

5. An electromagnetic shielding device for a current sensor according to claim 1, characterized in that: The surfaces of the shielding shell (401) and the movable shell (403) are provided with dustproof mechanisms (5). The dustproof mechanism (5) includes a fixed frame (51) and a mounting frame (52). There are two sets of fixed frames (51) and they are fixedly connected to the surfaces of the shielding shell (401) and the movable shell (403) respectively. The surface of the mounting frame (52) is fixedly connected with a dustproof sleeve (53).

6. An electromagnetic shielding device for a current sensor according to claim 5, characterized in that: The inner wall of the fixed frame (51) is slidably connected with a plug rod (54), and the surface of the mounting frame (52) is provided with a plug hole (55). The plug rod (54) is inserted into the surface of the plug hole (55). There are two sets of plug rods (54) and plug holes (55). The surface of the plug rod (54) is fixedly connected with a pull plate (56).

7. An electromagnetic shielding device for a current sensor according to claim 6, characterized in that: The surface of the insert rod (54) is fitted with a spring three (57), one end of the spring three (57) is fixedly connected to the surface of the pull plate (56), and the other end of the spring three (57) is fixedly connected to the surface of the fixing frame (51). The surface of the dust cover (53) is fitted with an elastic collar (58), and there are multiple elastic collars (58).

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