Low-voltage fuse and connecting plate structure thereof

Abstract

The utility model discloses a low-voltage fuse and a connecting plate structure thereof, the low-voltage fuse comprises a connecting plate, a first shell, a second shell, a locking convex plate, a matching boss, a locking bolt and a square locking plate, when the low-voltage fuse is used, the first shell and the second shell are in direct butt joint, the locking bolt is rotated to enable the square locking plate to press the locking convex plate, and the locking convex plate is locked by the matching boss. And when the device is damaged, the locking bolt can be reversed to open the locking convex plate, the first shell and the second shell are quickly opened, and maintenance is convenient. The device can be quickly started and maintained, meanwhile, a ratchet wheel, a clamping jaw, a pull handle, a second clamping groove and a spring are arranged, a movable rod is pulled through the pull handle to enable the clamping jaw to be disengaged from the ratchet wheel, a first shell is installed by rotating a locking rod, then the locking rod is loosened, then the pull handle is loosened, the clamping jaw is reset and clamped to the outer portion of the ratchet wheel under the elastic force of the spring, and the ratchet wheel is locked. The rotating rod is prevented from rotating due to the influence of external force, and the fixing effect on the first shell is weakened.

Description

TECHNICAL FIELD

[0001] The utility model relates to a fuse technical field especially relates to a low voltage fuse and connecting plate structure thereof. BACKGROUND

[0002] At present, people's life quality is rapidly improved, and the supply of electric power is never stopped. The consumption of electric power is extremely huge in industrial production and daily life. Many electric power control devices are provided with low voltage fuses. When short circuit fault or overload occurs in the electric equipment, the circuit can be automatically cut off to avoid damage of the electric equipment and prevent the accident from spreading.

[0003] Through the search, the patent with the Chinese patent application number CN218849409U discloses a low voltage fuse, which comprises a shell, a contact knife and a fuse body. The shell comprises a base and a cover. The base and the cover form an accommodating cavity. The opposite ends of the accommodating cavity are provided with fixing parts. The contact knives are arranged on the fixing parts. The fuse bodies are arranged in the accommodating cavity. The two ends of each fuse body are connected with the two contact knives respectively.

[0004] The above-mentioned patent has the following disadvantages: in the use of the above-mentioned device, the contact knife and the fuse body are installed in the base and the cover through buckles. The base and the cover are bonded by adhesive. It is difficult to open the device to repair the internal part after the internal fuse body is damaged. UTILITY MODEL CONTENT

[0005] The utility model aims at solving the shortcomings in the prior art and provides a low voltage fuse and connecting plate structure thereof.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A low voltage fuse comprises a shell one and a shell two. The outer side wall of the shell two is welded with an insertion plate. The insertion plate is fixedly inserted into the inner wall of the shell one. The outer side wall of the shell one and the insertion plate is provided with a joining hole. The inner part of the shell one and the shell two is provided with a fuse assembly. The outer side wall of the shell one is welded with an L-shaped mounting seat. The outer side wall of the shell two is welded with a matching boss. The opposite inner walls of the L-shaped mounting seat are rotatably connected with a locking lug. The locking lug is matched with the matching boss. The outer part of the locking lug is provided with a square notch. The inner wall of the L-shaped mounting seat is rotatably connected with a locking bolt through a thread. The outer side wall of the locking bolt is welded with a square locking plate. The square locking plate is matched with the square notch in the outer part of the locking lug.

[0008] As a further scheme of the utility model: the fuse assembly includes a contact blade and an insulating plate, the insulating plate is bonded to the outer sidewall of the contact blade, and a fuse body is welded between the outer sidewalls of opposite sides of the contact blade.

[0009] The connecting plate structure of the low-voltage fuse includes a connecting plate main mechanism, the connecting plate main mechanism includes a connecting plate and a buckling assembly, the shell one is placed on the top of the connecting plate, the buckling assembly is arranged on the outer sidewall of the connecting plate, and the buckling assembly includes a matching plate, a first clamping groove and a rotating rod.

[0010] As a further scheme of the utility model: the rotating rod is rotationally connected to the inner wall of the connecting plate, a locking rod is welded to the outer sidewall of the rotating rod, the locking rod cooperates with the matching plate and the first clamping groove, and a fixing plate is welded to the outer sidewall of the rotating rod.

[0011] As a further scheme of the utility model: a torsion spring is sleeved on the circumferential outer wall of the rotating rod, one end of the torsion spring is welded to the outer sidewall of the fixing plate, and the other end is welded to the bottom inner wall of the mounting groove.

[0012] As a further scheme of the utility model: a clamping piece is welded to the outer wall of the top of the connecting plate.

[0013] As a further scheme of the utility model: a second clamping groove is formed in the top of the connecting plate, a ratchet wheel is connected to the outer sidewall of the rotating rod through a key, a mounting groove is formed in the outer sidewall of the connecting plate, a guide block is welded to the inner sidewall of the mounting groove, a clamping jaw is slidably connected to the inner wall of the guide block, the clamping jaw is engaged with the ratchet wheel, and a spring is welded between the clamping jaw and the inner sidewall of the mounting groove.

[0014] As a further scheme of the utility model: a moving rod is welded to the outer sidewall of the clamping jaw, the moving rod is slidably connected to the inner wall of the connecting plate, a pull handle is rotationally connected to the outer sidewall of the moving rod, and the pull handle cooperates with the second clamping groove.

[0015] Compared with the prior art, the utility model provides a low-voltage fuse and a connecting plate structure thereof, which has the following beneficial effects:

[0016] The utility model discloses a locking convex plate, a matching convex platform, a locking bolt and a square locking plate are arranged, the shell one is directly connected with the shell two in use, the locking bolt is rotated to make the square locking plate press the locking convex plate, the shell one and the shell two are quickly fixed, the locking convex plate can be opened by reversing the locking bolt when the device is damaged, the shell one and the shell two are quickly opened, and maintenance is facilitated.

[0017] The utility model discloses, through setting up the combination of buckle assembly cooperation board, locking lever, torsion spring, card slot, first rotating locking lever, then placing shell one, loosening locking lever, locking lever is clamped in the inside of card slot one under the elastic force of torsion spring, and the cooperation board is extruded, and this installation mode is quick and efficient.

[0018] The utility model discloses, through setting up ratchet wheel, dog, pull handle, card slot two, spring, through the pull handle and make the dog separate and the meshing of ratchet wheel and move the link, rotate locking lever and install shell one, then loosen locking lever, and the dog is reset and clamped in the outside of ratchet wheel under the elastic force of spring, avoid the rotation of the rotary lever and be affected by external force, weaken the fixed effect of shell one.

[0019] The part not involved in the device is same as the prior art or can be realized by the prior art. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The utility model discloses a low-voltage fuse and its connecting plate structure whole structure schematic diagram is proposed;

[0021] Figure 2 The utility model discloses a low-voltage fuse and its connecting plate structure shell one and shell two explosion structure schematic diagram is proposed;

[0022] Figure 3 The utility model discloses a low-voltage fuse and its connecting plate structure shell one and shell two assembly structure schematic diagram is proposed;

[0023] Figure 4 The utility model discloses a low-voltage fuse and its connecting plate structure buckle assembly structure schematic diagram is proposed.

[0024] In the drawing: 1, connecting plate;2, locking lever;3, shell one;4, cooperation board;5, card slot one;6, clamping piece;7, shell two;8, add hole;9, contact knife;10, insulating plate;11, fuse body;12, insert plate;13, L type mounting seat;14, square locking plate;15, locking bolt;16, locking convex plate;17, cooperation boss;18, rotary lever;19, fixed plate;20, torsion spring;21, ratchet wheel;22, dog;23, guide block;24, moving link;25, pull handle;26, spring;27, card slot two;28, installation slot. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments.

[0026] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example 1

[0027] A low-voltage fuse, designed to facilitate internal repairs, such as... Figures 1-4 As shown, the device includes a first housing 3 and a second housing 7. An insertion plate 12 is welded to the outer side wall of the second housing 7. The insertion plate 12 is fixedly inserted into the inner wall of the first housing 3. Both the first housing 3 and the insertion plate 12 have insertion holes 8 on their outer side walls. Both the first housing 3 and the second housing 7 have fusible components inside. An L-shaped mounting base 13 is welded to the outer side wall of the first housing 3. A mating boss 17 is welded to the outer side wall of the second housing 7. A locking protrusion 16 is rotatably connected between the inner walls of opposite sides of the L-shaped mounting base 13. The locking protrusion 16 mates with the mating boss 17. A square slot is opened on the outer side of the locking protrusion 16. A locking bolt 15 is rotatably connected to the inner wall of the L-shaped mounting base 13 by a thread. A square locking plate 14 is welded to the outer side wall of the locking bolt 15. The square locking plate 14 mates with the square slot opened on the outer side of the locking protrusion 16.

[0028] In use, after installing the fuse assembly, align housing 3 and housing 7. When inserting the insertion plate 12 into housing 3, first align the insertion plate 12 with the inlet hole 8 on the outside of housing 3. Add the arc-extinguishing medium through the inlet hole 8. Then, continue to push the insertion plate 12 to fully align housing 3 and housing 7. Then, rotate the locking protrusion 16 to press against the outer wall of the mating protrusion 17, and rotate the locking bolt 15 to press the square locking plate 14 against the locking protrusion 16, thus quickly fixing housing 3 and housing 7. In case of device damage, the locking bolt 15 can be reversed to open the locking protrusion 16, quickly opening housing 3 and housing 7 for easy maintenance.

[0029] The fuse assembly includes a contact blade 9 and an insulating plate 10. The insulating plate 10 is bonded to the outer sidewall of the contact blade 9, and a fuse element 11 is welded between the outer sidewalls of opposite sides of the contact blade 9.

[0030] In use, the fuse 11 can be inserted into the inner wall of housing 1 3. After housing 1 3 and housing 2 7 are connected, the contact knife 9 can be directly fixed. The fuse 11 can directly contact the contact knife 9 for use.

[0031] Working principle: when in use, the fuse 11 is inserted into the inner wall of the shell one 3, and the contact knife 9 is fixed directly after the shell one 3 and the shell two 7 are connected. The fuse 11 is directly in contact with the contact knife 9. Then, the shell one 3 and the shell two 7 are connected, and the insertion plate 12 is inserted into the shell one 3. First, the insertion plate 12 is aligned with the adding hole 8 outside the shell one 3, and the arc extinguishing medium is added through the adding hole 8. Then, the insertion plate 12 is continuously pushed to make the shell one 3 and the shell two 7 completely connected. Then, the locking lug 16 is rotated to press the outer wall of the matching lug 17, and the square locking plate 14 is rotated to press the locking lug 16, so as to realize the quick fixing of the shell one 3 and the shell two 7. When the device is damaged, the locking lug 15 can be reversed to open the locking lug 16, so as to quickly open the shell one 3 and the shell two 7, which is convenient for maintenance. Example 2

[0032] A connecting plate structure of a low-voltage fuse, as shown in Figures 1-4 In order to realize more close fixing of the shell one 3, the embodiment is supplemented based on the embodiment 1 as follows: including a connecting plate main mechanism, the connecting plate main mechanism includes a connecting plate 1 and a buckling assembly, the buckling assembly is arranged on the outer side wall of the connecting plate assembly main mechanism, the shell one 3 is placed on the top of the connecting plate 1, and the clamping piece 6 is welded on the outer wall of the top of the connecting plate 1.

[0033] After the shell one 3 and the shell two 7 are completely connected and assembled, the shell one 3 is placed downward on the top of the connecting plate 1, and the clamping piece 6 clamps and fixes the contact knife 9 fixed by the shell one 3 and the shell two 7, which is convenient for subsequent use.

[0034] The buckling assembly includes a matching plate 4, a clamping groove one 5, a rotating rod 18 and a mounting groove 28. The mounting groove 28 is opened on the outer side wall of the connecting plate 1. The matching plate 4 is welded on the outer side wall of the shell one 3. The clamping groove one 5 is opened on the top of the connecting plate 1. The rotating rod 18 is rotationally connected to the inner wall of the connecting plate 1. The locking rod 2 is welded on the outer side wall of the rotating rod 18. The locking rod 2 cooperates with the matching plate 4 and the clamping groove one 5. The fixing plate 19 is welded on the outer side wall of the rotating rod 18. The torsion spring 20 is sleeved on the circumferential outer wall of the rotating rod 18. One end of the torsion spring 20 is welded on the outer side wall of the fixing plate 19, and the other end is welded on the bottom inner wall of the mounting groove 28.

[0035] First, rotate the locking rod 2, then place the shell one 3 vertically on the top of the connecting plate 1, loosen the locking rod 2, and the locking rod 2 is clamped in the clamping groove one 5 under the elastic force of the torsion spring 20, while the matching plate 4 is extruded, so that the shell one 3 is fixed on the top of the connecting plate 1. This installation method is quick and efficient.

[0036] The connecting plate 1 is provided with a clamping groove 27 on the top, the external sidewall of the rotating rod 18 is connected with a ratchet 21 through a key, the internal sidewall of the mounting groove 28 is welded with a guide block 23, the inner wall of the guide block 23 is slidably connected with a clamping jaw 22, the clamping jaw 22 is engaged with the ratchet 21, the clamping jaw 22 and the internal sidewall of the mounting groove 28 are welded with a spring 26, the external sidewall of the clamping jaw 22 is welded with a moving rod 24, the moving rod 24 is slidably connected with the inner wall of the connecting plate 1, and the external sidewall of the moving rod 24 is rotatably connected with a pull handle 25, and the pull handle 25 is matched with the clamping groove 27.

[0037] Before the rotating locking rod 2 is used to install the shell 3, the moving rod 24 is pulled through the pull handle 25 to make the clamping jaw 22 disengage from the ratchet 21, then the rotating locking rod 2 is rotated, the shell 3 is installed, then the rotating locking rod 2 is loosened, and the pull handle 25 is loosened to make the pull handle 25 be accommodated in the clamping groove 27, the clamping jaw 22 is reset to be clamped on the external sidewall of the ratchet 21 under the elastic force of the spring 26, the rotating rod 18 is prevented from being rotated under the influence of external force, and the fixing effect on the shell 3 is weakened.

[0038] Working principle: after the shell 3 and the shell 7 are completely butted and assembled, the shell 3 is placed on the top of the connecting plate 1, the clamping piece 6 clamps and fixes the contact knife 9 fixed by the shell 3 and the shell 7, before the rotating locking rod 2 is used to install the shell 3, the moving rod 24 is pulled through the pull handle 25 to make the clamping jaw 22 disengage from the ratchet 21, the rotating locking rod 2 is rotated, then the shell 3 is vertically placed on the top of the connecting plate 1, the rotating locking rod 2 is loosened, and the pull handle 25 is loosened to make the pull handle 25 be accommodated in the clamping groove 27, the clamping jaw 22 is reset to be clamped on the external sidewall of the ratchet 21 under the elastic force of the spring 26, the rotating locking rod 2 is clamped in the clamping groove 5 under the elastic force of the torsion spring 20, the matching plate 4 is extruded, the shell 3 is fixed on the top of the connecting plate 1, the installation mode is fast and efficient, the rotating rod 18 is prevented from being rotated under the influence of external force, and the fixing effect on the shell 3 is weakened.

[0039] The above is only a preferred specific implementation manner of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the application concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A low-voltage fuse, comprising a first housing (3) and a second housing (7), characterized in that, An insertion plate (12) is welded to the outer side wall of the second housing (7). The insertion plate (12) is fixedly inserted into the inner wall of the first housing (3). Both the outer side walls of the first housing (3) and the insertion plate (12) are provided with insertion holes (8). Fusible components are provided inside the first housing (3) and the second housing (7). An L-shaped mounting base (13) is welded to the outer side wall of the first housing (3). A mating boss (17) is welded to the outer side wall of the second housing (7). (13) A locking protrusion (16) is rotatably connected between the inner walls on opposite sides. The locking protrusion (16) is engaged with the mating boss (17). A square slot is provided on the outside of the locking protrusion (16). A locking bolt (15) is rotatably connected to the inner wall of the L-shaped mounting base (13) by a thread. A square locking plate (14) is welded to the outer side wall of the locking bolt (15). The square locking plate (14) is engaged with the square slot provided on the outside of the locking protrusion (16).

2. A low-voltage fuse according to claim 1, characterized in that, The fuse assembly includes a contact blade (9) and an insulating plate (10). The insulating plate (10) is bonded to the outer sidewall of the contact blade (9), and a fuse element (11) is welded between the outer sidewalls of opposite sides of the contact blade (9).

3. A connection plate structure for a low-voltage fuse, used for connecting the low-voltage fuse according to any one of claims 1-2, characterized in that, The main body of the connecting plate includes a connecting plate (1) and a fastening assembly. The housing (3) is placed on the top of the connecting plate (1). The fastening assembly is located on the outer side wall of the connecting plate (1). The fastening assembly includes a mating plate (4), a slot (5), and a rotating rod (18). The mating plate (4) is welded to the outer side wall of the housing (3). The slot (5) is opened on the top of the connecting plate (1).

4. The connection plate structure of a low-voltage fuse according to claim 3, characterized in that, The rotating rod (18) is rotatably connected to the inner wall of the connecting plate (1). A locking rod (2) is welded to the outer side wall of the rotating rod (18). The locking rod (2) cooperates with the mating plate (4) and the slot (5). A fixing plate (19) is welded to the outer side wall of the rotating rod (18).

5. The connection plate structure of a low-voltage fuse according to claim 4, characterized in that, A torsion spring (20) is sleeved on the outer circumference of the rotating rod (18). One end of the torsion spring (20) is welded to the outer side wall of the fixing plate (19), and the other end is welded to the bottom inner wall of the mounting groove (28).

6. The connection plate structure of a low-voltage fuse according to claim 5, characterized in that, The top outer wall of the connecting plate (1) is welded with a clip (6).

7. The connection plate structure of a low-voltage fuse according to claim 6, characterized in that, The top of the connecting plate (1) is provided with a slot 2 (27). The outer side wall of the rotating rod (18) is connected to a ratchet (21) by a key. The outer side of the connecting plate (1) is provided with an installation slot (28). The inner side wall of the installation slot (28) is welded with a guide block (23). The inner wall of the guide block (23) is slidably connected with a pawl (22). The pawl (22) meshes with the ratchet (21). A spring (26) is welded between the pawl (22) and the inner side wall of the installation slot (28).

8. The connection plate structure of a low-voltage fuse according to claim 7, characterized in that, The outer sidewall of the claw (22) is welded with a movable rod (24), which is slidably connected to the inner wall of the connecting plate (1). The outer sidewall of the movable rod (24) is rotatably connected with a handle (25), which cooperates with the second slot (27).

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