Fuse for charging pile

Abstract

The utility model relates to a fuse for a charging pile, and relates to the technical field of fuses, the fuse comprises an insulating shell and a fuse piece located in the insulating shell, baffle plates are arranged at openings at two ends of the insulating shell, and connecting pieces are fixedly arranged on the side surfaces, far away from the insulating shell, of the baffle plates; one baffle is provided with a sand filling hole and a plugging button for plugging the sand filling hole; the edge of an opening in the end part of the insulating shell is provided with a fixed sinking groove for the baffle plate to insert, the periphery of the insulating shell is provided with a locking through hole communicated with the fixed sinking groove, and the periphery of the baffle plate is provided with a locking screw hole; a locking screw which penetrates through the locking through hole and then is screwed into the locking screw hole is arranged outside the insulating shell, and a receding sinking groove for clamping a nut part of the locking screw is formed in the edge of an opening in the outer side of the locking through hole; after the baffle is installed, the exposed outer side face of the baffle is flush with the end face of the insulating shell, and the influence of collision on the joint of the baffle and the insulating shell is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of fuses, and in particular to a fuse for a charging pile. Background Art

[0002] With the booming development of the new energy vehicle industry, the safety and reliability of charging piles have become a focus of attention. As a key protection component in charging pile circuits, fuses are crucial because they can quickly cut off the circuit in the event of a current overload or short circuit, protecting equipment from damage.

[0003] One existing fuse design primarily consists of an insulating sleeve, an internal sheet-shaped fuse element, and sealing baffles at the top and bottom. These sealing baffles are not only fixed to the ends of the insulating sleeve but also feature wiring tabs for circuit connection. One of the baffles has a sand filling hole for filling quartz sand between the fuse elements to enhance arc extinguishing capability. After sand filling, the hole is sealed with a cap to ensure the integrity of the fuse.

[0004] However, since the sealing baffle is generally fixed directly to the two end faces of the insulating sleeve through sealant, if it encounters severe bumps during transportation or installation, it may cause a small gap to appear at the joint. In severe cases, it may also cause the sealant to fail to fix, and then cause quartz sand to leak, affecting the normal working performance of the fuse. Therefore, there is room for further improvement in this technical defect. Utility Model Content

[0005] The purpose of this application is to provide a fuse for a charging pile, which solves the problem that a gap may appear at the joint between the sealing baffle and the insulating sleeve due to severe collisions during transportation or installation in the above-mentioned related technology, resulting in the possibility of quartz sand leakage.

[0006] The present application provides a charging pile fuse that adopts the following technical solution:

[0007] A fuse for a charging pile comprises an insulating shell and a fuse element located inside the insulating shell, baffles are provided at the openings at both ends of the insulating shell, connecting pieces are fixedly provided on the sides of the baffles away from the insulating shell, a sand filling hole and a sealing button for sealing the sand filling hole are provided on one of the baffles; a fixed recess for inserting the baffle is provided on the edge of the end opening of the insulating shell, a locking through hole connected to the fixed recess is provided on the outer periphery of the insulating shell, a locking screw hole is provided on the outer periphery of the baffle; a locking screw is provided on the outside of the insulating shell, which passes through the locking through hole and is screwed into the locking screw hole, and a clearance recess for the nut part of the locking screw to be clamped is provided on the outer opening edge of the locking through hole.

[0008] By adopting the above technical solution, when the baffle and the insulating shell are installed, the baffle is placed in the fixed groove in advance, and the locking through hole and the locking screw hole are overlapped, and then the locking screw is passed through the locking through hole and screwed into the locking screw hole, and finally the nut part of the locking screw is stuck in the inside of the yield groove; since the baffle adopts this fixing method, after the baffle is installed, the exposed outer side of the baffle is flush with the end face of the insulating shell, thereby reducing the impact of collisions on the connection between the baffle and the insulating shell, and reducing the possibility of quartz sand leakage due to collisions.

[0009] Optionally, the outer surface of the connecting piece is provided with a sandblasting layer.

[0010] By adopting the above technical solution, due to the provision of the sandblasting layer, the surface of the connecting piece has good oxidation resistance, thereby extending the service life of the connecting piece.

[0011] Optionally, a waist-shaped fixing hole is provided on the connecting piece.

[0012] By adopting the above technical solution, during the installation process of the fuse, the waist-shaped fixing holes on the connecting piece are provided, which facilitates subsequent fastening connection with other electrical equipment by screws.

[0013] Optionally, a guide block is fixedly provided on the outer periphery of the baffle, and a guide slot for inserting the guide block is opened on the inner wall of the fixed sink.

[0014] By adopting the above technical solution, after the baffle is installed, the guide block on the baffle is inserted into the guide groove, thereby further improving the installation stability of the baffle.

[0015] Optionally, a sealing gasket is provided on the side surface of the insulating shell, and a sealing ring groove for inserting the sealing gasket is opened on the outer edge of the side surface of the baffle close to the insulating shell.

[0016] By adopting the above technical solution, when the baffle and the insulating shell are installed, the sealing gasket is pre-installed inside the sealing ring groove. After installation, one side of the sealing gasket is pressed against the bottom side of the fixed groove, thereby enhancing the sealing performance of the connection between the baffle and the insulating shell.

[0017] Optionally, a positioning convex ring is fixedly provided on the side surface of the sealing gasket close to its own axis, and a positioning ring groove for the positioning convex ring to be inserted into is opened on the inner wall of the sealing ring groove.

[0018] By adopting the above technical solution, when the sealing gasket is installed in the sealing ring groove, due to the setting of the positioning protrusion and the positioning ring groove, the positioning protrusion on the sealing gasket is simultaneously inserted into the positioning ring groove on the inner wall of the sealing ring groove, thereby improving the installation stability of the sealing gasket on the baffle.

[0019] Optionally, a guiding slope is provided on the inner edge of the opening of the fixed sink.

[0020] By adopting the above technical solution, the baffle can be better inserted into the fixed sink along the guiding slope, which facilitates the assembly and fixation of the baffle.

[0021] Optionally, a clamping ring is fixedly provided on the outer peripheral surface of the baffle, and a guide inclined surface capable of fitting with the guide inclined surface is provided on the side edge of the clamping ring.

[0022] By adopting the above technical solution, the provision of the retaining ring can fill the gap between the guiding slope and the baffle, thereby further improving the sealing performance of the fuse and reducing the possibility of subsequent leakage of quartz sand.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. When installing the baffle and the insulating shell, place the baffle in the fixed sink groove in advance, and make the locking through hole coincide with the locking screw hole, then use the locking screw to pass through the locking through hole and screw it into the locking screw hole, and finally make the nut part of the locking screw fit into the inside of the yielding sink groove; after the baffle is installed, the exposed outer side of the baffle is flush with the end face of the insulating shell, so as to reduce the impact of bumps on the connection between the baffle and the insulating shell, and reduce the possibility of quartz sand leakage due to bumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 This is a schematic diagram of the overall structure of Example 1 of the present application;

[0027] Figure 2 This is a partial cross-sectional structural diagram of the baffle installation and coordination embodiment 1 of the present application;

[0028] Figure 3 This is a schematic diagram of the overall structure of Example 2 of the present application;

[0029] Figure 4 This is a structural diagram of the installation distribution of the baffle, sealing gasket and insulating housing in Example 2 of the present application;

[0030] Figure 5 This is a partial cross-sectional structural diagram of the installation and cooperation of the guide block and the guide slot according to the second embodiment of the present application;

[0031] Figure 6 It is a schematic diagram of the partial cross-sectional structure of the cover plate installation cooperation according to Example 2 of the present application.

[0032] In the figure, 1. Insulating shell; 11. Fixed groove; 111. Guide slide groove; 112. Guide slope; 12. Locking through hole; 121. Yielding groove; 2. Baffle; 21. Sand filling hole; 22. Sealing button; 23. Locking screw hole; 24. Guide block; 25. Snap ring; 251. Guide slope; 26. Sealing ring groove; 261. Positioning ring groove; 3. Connecting piece; 31. Waist-shaped fixing hole; 4. Locking screw; 5. Sealing gasket; 51. Positioning convex ring. DETAILED DESCRIPTION

[0033] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0034] Example 1:

[0035] Reference Figure 1 A charging pile fuse includes an insulating housing 1 and a fuse element (not shown) located within the insulating housing 1. Baffles 2 are fixedly disposed at both end openings of the insulating housing 1. A connecting piece 3 is integrally formed on the side of the baffle 2 away from the insulating housing 1. The insulating housing 1 is made of epoxy resin, and the baffles 2 and connecting piece 3 are both conductive metal (copper).

[0036] In addition, one of the baffles 2 is provided with a sand filling hole 21 and a sealing button 22 for sealing the sand filling hole 21; it is convenient to pour quartz sand into the interior of the insulating shell 1, and then the sand filling hole 21 is sealed by the sealing button 22 after the pouring is completed. This is a conventional structure and will not be repeated here.

[0037] Reference Figure 2 A fixed recess 11 for inserting the baffle 2 is provided on the edge of the end opening of the insulating housing 1. Two locking through holes 12 communicating with the fixed recess 11 are symmetrically provided on the outer periphery of the insulating housing 1, and a locking screw hole 23 that can coincide with the locking through holes 12 is provided on the outer periphery of the baffle 2;

[0038] A locking screw 4 is provided on the outside of the insulating shell 1, and a recess 121 is provided on the outer opening edge of the locking through hole 12; when the baffle 2 is placed inside the fixed recess 11 and the locking through hole 12 coincides with the locking screw hole 23, the locking screw 4 is passed through the locking through hole 12 and then screwed into the locking screw hole 23, and finally the nut part of the locking screw 4 is stuck in the recess 121.

[0039] Reference Figure 1The outer surface of the connecting piece 3 is provided with a sandblasting layer (not shown in the figure); this sandblasting treatment provides the outer surface of the connecting piece 3 with a sandblasting layer, which provides the surface of the connecting piece 3 with good oxidation resistance, thereby extending the service life of the connecting piece 3. Waist-shaped fixing holes 31 are formed in the connecting piece 3 to facilitate subsequent connection with other electrical equipment via screws.

[0040] The implementation principle of the embodiment of this application is:

[0041] When installing the baffle 2 and the insulating shell 1, the baffle 2 is placed in the fixed groove 11 in advance, and the locking through hole 12 is overlapped with the locking screw hole 23. Then the locking screw 4 is passed through the locking through hole 12 and screwed into the locking screw hole 23. Finally, the nut part of the locking screw 4 is stuck in the inside of the yield groove 121; since the exposed outer side surface of the baffle 2 is flush with the end face of the insulating shell 1, the impact of collision on the connection between the baffle 2 and the insulating shell 1 is reduced.

[0042] Example 2:

[0043] Reference Figure 3 、 Figure 4 and Figure 5 The difference between the embodiment of the present application and embodiment 1 is that two guide blocks 24 are symmetrically fixed on the outer periphery of the baffle 2, and a guide groove 111 for inserting the guide block 24 is opened on the inner wall of the fixed sink 11; thereby enhancing the assembly stability of the baffle 2 and the insulating shell 1.

[0044] Reference Figure 4 and Figure 5 The side of the insulating housing 1 is provided with a sealing gasket 5 made of rubber material. A positioning convex ring 51 is integrally injection-molded on the side of the sealing gasket 5 close to its own axis, and the cross-sectional shape of the positioning convex ring 51 is an arc surface, and the arc length corresponding to the arc surface is a minor arc;

[0045] A sealing ring groove 26 for inserting the sealing gasket 5 is provided on the outer edge of the side surface of the baffle 2 close to the insulating shell 1, and a positioning ring groove 261 for the positioning convex ring 51 to be snapped into is provided on the inner wall of the sealing ring groove 26; this not only realizes the installation and fixation of the sealing gasket 5, but also strengthens the sealing performance of the connection between the baffle 2 and the insulating shell 1 through the sealing gasket 5.

[0046] Refer to 4 and Figure 6A snap ring 25 is integrally formed on the outer peripheral surface of the baffle 2, a guide slope 112 is provided on the inner edge of the opening of the fixed sink 11, and a guide slope 251 that can fit with the guide slope 112 is provided on the side edge of the snap ring 25; when the baffle 2 and the insulating shell 1 are installed, the baffle 2 can be better inserted into the interior of the fixed sink 11 along the guide slope 112, and due to the fit between the guide slope 112 and the guide slope 251 on the snap ring 25, the corresponding gap is reduced, thereby improving the overall sealing performance of the fuse.

[0047] The implementation principle of the embodiment of this application is:

[0048] When the baffle 2 and the insulating shell 1 are installed, the sealing gasket 5 is pre-installed inside the sealing ring groove 26, and the rear baffle 2 can be better inserted into the fixed sink 11 along the guide slope 112, and the guide block 24 is simultaneously inserted into the guide slide groove 111, and finally fastened with the locking screw 4.

[0049] Unless otherwise defined, the terms or scientific terms used in this application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second", "third" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. "A" or "one" and other similar words do not indicate a quantity limit, but rather indicate the existence of at least one. "Include" or "comprising" and other similar words mean that the elements or objects appearing before "include" or "comprising" cover the elements or objects listed after "include" or "comprising" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0050] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A fuse for a charging pile, comprising an insulating shell (1) and a fuse element located in the insulating shell (1), wherein baffles (2) are provided at both end openings of the insulating shell (1), a connecting piece (3) is fixedly provided on the side of the baffle (2) away from the insulating shell (1), and a sand filling hole (21) and a sealing button (22) for sealing the sand filling hole (21) are provided on one of the baffles (2); It is characterized by: A fixed recess (11) for inserting the baffle (2) is provided on the edge of the end opening of the insulating shell (1), a locking through hole (12) communicating with the fixed recess (11) is provided on the outer periphery of the insulating shell (1), and a locking screw hole (23) is provided on the outer periphery of the baffle (2); The insulating shell (1) is provided with a locking screw (4) that passes through the locking through hole (12) and is screwed into the locking screw hole (23). The outer opening edge of the locking through hole (12) is provided with a recessed groove (121) for the nut of the locking screw (4) to be inserted.

2. A fuse for a charging pile according to claim 1, characterized in that: The outer surface of the connecting piece (3) is provided with a sandblasting layer.

3. A fuse for a charging pile according to claim 1, characterized in that: The connecting piece (3) is provided with a waist-shaped fixing hole (31).

4. A fuse for a charging pile according to claim 1, characterized in that: A guide block (24) is fixedly provided on the outer periphery of the baffle (2), and a guide sliding groove (111) for inserting the guide block (24) is provided on the inner wall of the fixed sink groove (11).

5. The fuse for a charging pile according to claim 1, characterized in that: A sealing gasket (5) is provided on the side of the insulating shell (1), and a sealing ring groove (26) for inserting the sealing gasket (5) is provided on the outer edge of the side of the baffle (2) close to the insulating shell (1).

6. A fuse for a charging pile according to claim 5, characterized in that: A positioning convex ring (51) is fixedly provided on the side of the sealing gasket (5) close to its own axis, and a positioning ring groove (261) for the positioning convex ring (51) to be inserted is opened on the inner wall of the sealing ring groove (26).

7. The fuse for a charging pile according to claim 1, characterized in that: A guiding slope (112) is provided on the inner edge of the opening of the fixed sink (11).

8. The fuse for a charging pile according to claim 7, characterized in that: A snap ring (25) is fixedly provided on the outer peripheral surface of the baffle (2), and a guide slope (251) capable of fitting with the guide slope (112) is provided on the side edge of the snap ring (25).

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