A current limiting fuse that is easy to maintain

Abstract

The utility model discloses an easy-to-maintain current-limiting fuse, comprising a mounting shell, wherein the interior of the mounting shell is connected with a double-threaded screw through a bearing, one end of the double-threaded screw extends to the exterior of the mounting shell and is fixed with a rotating block, the exterior of the double-threaded screw is connected with two sliders through threads, the two sliders are located inside the mounting shell, a connecting seat is provided on one side of the mounting shell, the bottom of the connecting seat is fixed with the slider, an insulator is fixed on the top of the connecting seat, a conductor block is fixed on the top of the insulator, a plug-in hole is opened on one side of the outer wall of the conductor block, and a fuse tube is provided between the two conductor blocks. The utility model enables the specific position between the two conductor blocks to be changed through the rotation of the double-threaded screw, thereby enabling the two ends of the fuse tube to be plugged into the plug-in hole of the conductor block, so that when the fuse tube is replaced, it can be disassembled and installed without using a large force, thereby making it more labor-saving to replace the fuse tube of the current-limiting fuse.

Description

Technical Field

[0001] The utility model relates to the technical field of current limiting fuses, in particular to a current limiting fuse which is easy to maintain. Background Art

[0002] A current-limiting fuse is a fuse that can safely cut off all possible currents within its rated current and current-limiting range. It limits the fusing time under rated voltage to equal to or less than the first mainstream wave or symmetrical current wave, and at the same time limits the passing current to less than the peak current. The current-limiting fuse includes a clamp seat and a fuse tube. The fuse tube is usually mounted on the clamp seat by a clip-on method. However, when the fuse tube is clipped to the clamp seat, the staff needs to use a large force to clip the fuse tube to the clamp seat, which makes the fuse tube of the current-limiting fuse more laborious to replace. Therefore, it is urgent to design a current-limiting fuse that is easy to maintain to solve the above problems. Utility Model Content

[0003] The purpose of the utility model is to provide a current limiting fuse which is easy to maintain, so as to solve the above-mentioned deficiencies in the prior art.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A current-limiting fuse that is easy to maintain, comprises a mounting shell, wherein a double-thread screw is connected to the interior of the mounting shell via a bearing, one end of the double-thread screw extends to the outside of the mounting shell and is fixed with a rotating block, the outside of the double-thread screw is connected to two sliders via threads, the two sliders are located inside the mounting shell, a connecting seat is provided on one side of the mounting shell, the bottom of the connecting seat is fixed to the slider, an insulator is fixed to the top of the connecting seat, a conductor block is fixed to the top of the insulator, a plug hole is opened on the outer wall of one side of the conductor block, a fuse tube is provided between the two conductor blocks, and both ends of the fuse tube are plugged into the inside of the plug hole.

[0006] Furthermore, a slide rail is fixed to the top inner wall of the mounting shell, a slide groove is formed on the top outer wall of the sliding block, and the slide rail is located inside the slide groove.

[0007] Furthermore, a conductor column and a spring are provided inside the plug hole, the spring is located on the side of the conductor column away from the fuse tube, a sliding rod is fixed to the outer wall of one side of the conductor column, one end of the sliding rod extends to the outside of the conductor block and is fixed with a stopper, and an identification line is provided on the outer wall of one side of the sliding rod.

[0008] Furthermore, an inner wall of the slide groove is provided with a receiving hole, and a graphite block is fixed inside the receiving hole.

[0009] Furthermore, a wiring board is integrally formed on one side outer wall of the conductor block, and a wiring hole is opened on the top outer wall of the wiring board.

[0010] Furthermore, a mounting plate is integrally formed on the bottom outer wall of the mounting shell, and a mounting hole is formed on the top outer wall of the mounting plate.

[0011] In the above technical scheme, the utility model provides an easy-to-maintain current-limiting fuse, which has the following beneficial effects: by rotating the double-thread screw, the specific position between the two conductor blocks can be changed, so that the two ends of the fuse tube can be plugged into the plug-in hole of the conductor block, so that when the fuse tube is replaced, it is not necessary to use a large force to complete the disassembly and installation, so that the fuse tube of the current-limiting fuse is more labor-saving when replacing; the elastic force of the spring makes the conductor column and the end of the fuse tube come into close contact, so that the fuse tube forms a good electrical contact after installation, making the replacement of the fuse tube more reliable; by setting the slide bar and the marking line, the slide bar is used to make the conductor column more stable during movement, and the conductor block is exposed through the marking line, indicating the depth of the fuse tube inserted into the plug-in hole to reach the ideal position. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0013] Figure 1 The present invention provides a schematic cross-sectional structure diagram of an embodiment of a current-limiting fuse that is easy to maintain.

[0014] Figure 2 The present invention is a schematic diagram of a connection base structure provided for an embodiment of a current-limiting fuse that is easy to maintain.

[0015] Figure 3 A structural schematic diagram is provided for an embodiment of a current limiting fuse that is easy to maintain according to the utility model.

[0016] Description of reference numerals:

[0017] 1 mounting shell, 2 double-thread screw, 3 slider, 4 connecting seat, 5 conductor block, 6 plug hole, 7 fuse tube, 8 rotating block, 9 slide rail, 10 insulator, 11 conductor column, 12 slide rod, 13 spring, 14 stopper, 15 terminal board, 16 wiring hole, 17 receiving hole, 18 graphite block, 19 mounting plate, 20 mounting hole, 21 slide groove, 22 identification line. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] like Figure 1-3 As shown, an embodiment of the utility model provides an easy-to-maintain current-limiting fuse, including a mounting shell 1, the interior of the mounting shell 1 is connected with a double-thread screw 2 through a bearing, one end of the double-thread screw 2 extends to the outside of the mounting shell 1 and is fixed with a rotating block 8, the outside of the double-thread screw 2 is connected with two sliders 3 through threads, the two sliders 3 are located inside the mounting shell 1, a connecting seat 4 is provided on one side of the mounting shell 1, the bottom of the connecting seat 4 is fixed to the slider 3, an insulator 10 is fixed on the top of the connecting seat 4, a conductor block 5 is fixed on the top of the insulator 10, a plug-in hole 6 is opened on the outer wall of one side of the conductor block 5, a fuse tube 7 is provided between the two conductor blocks 5, and both ends of the fuse tube 7 are plugged into the inside of the plug-in hole 6.

[0020] Specifically, in this embodiment, a mounting shell 1 is included, wherein a double-thread screw 2 is connected to the inside of the mounting shell 1 through a bearing, and the double-thread screw 2 has two threads with opposite spiral directions. One end of the double-thread screw 2 extends to the outside of the mounting shell 1 and is fixed with a rotating block 8. The rotating block 8 has a hexagonal hole inside, so that a hexagonal wrench can be inserted into the rotating block 8 to rotate it. Two sliders 3 are connected to the outside of the double-thread screw 2 through threads. The two sliders 3 are located inside the mounting shell 1. When the double-thread screw 2 is rotated, the two sliders 3 can approach or move away from each other. A connecting seat 4 is provided on one side of the mounting shell 1. The bottom of the connecting seat 4 is fixed to the slider 3. An insulator 10 is fixed to the top of the connecting seat 4. A conductor block 5 is fixed to the top of the insulator 10. The insulator 10 achieves the effect of insulating the conductor block 5 and the connecting seat 4. The use of the current limiting fuse is safer. The insulator 10 and the slider 3 are fixed by the connecting seat 4, so that the mounting shell 1 can be opened downward, so that the outer wall of the double-thread screw 2 is not easy to adhere to dust. A plug hole 6 is opened on the outer wall of one side of the conductor block 5, and a fuse tube 7 is arranged between the two conductor blocks 5. The two ends of the fuse tube 7 are inserted into the inside of the plug hole 6, and the end of the fuse tube 7 contacts the inner wall of the plug hole 6, so that the fuse tube 7 and the conductor block 5 form an electrical contact. A slide rail 9 is fixed to the top inner wall of the mounting shell 1, and a slide groove 21 is opened on the top outer wall of the slider 3. The slide rail 9 is located inside the slide groove 21. The slide rail 9 is used to make the slider 3 more stable when moving. The bottom outer wall of the mounting shell 1 is integrally formed with a mounting plate 19, and the top outer wall of the mounting plate 19 is opened with a mounting hole 20. The mounting hole 20 is used to facilitate bolt fixing of the mounting shell 1.

[0021] The utility model provides a current-limiting fuse that is easy to maintain. Through the rotation of the double-thread screw 2, the specific connection between the two conductor blocks 5 can be changed, so that the two ends of the fuse tube 7 can be plugged into the plug-in hole 6 of the conductor block 5, so that when the fuse tube 7 is replaced, it is not necessary to use a large force to complete the disassembly and installation, thereby making it more labor-saving to replace the fuse tube 7 of the current-limiting fuse.

[0022] In another embodiment provided by the utility model, a conductor post 11 and a spring 13 are provided inside the plug hole 6. The spring 13 is located on the side of the conductor post 11 away from the fuse tube 7. The elastic force of the spring 13 makes the conductor post 11 and the end of the fuse tube 7 closely contact each other, thereby achieving good electrical contact between the fuse tube 7 and the fuse tube 7 after installation, making the replacement of the fuse tube 7 more reliable. A slide bar 12 is fixed to the outer wall of one side of the conductor post 11. One end of the slide bar 12 extends to the outside of the conductor block 5 and is fixed with a stopper 14. An outer wall of one side of the slide bar 12 is provided with a mark Line 22, through the setting of the slide bar 12 and the identification line 22, the slide bar 12 is used to make the conductor column 11 more stable during movement, and the conductor block 5 is exposed through the identification line 22, indicating the depth of the fuse tube 7 inserted into the plug hole 6 to reach the ideal position; the inner wall of the slide groove 21 is provided with a receiving hole 17, and a graphite block 18 is fixed inside the receiving hole 17, and the graphite block 18 plays a lubricating role for the sliding of the slider 3; the outer wall of one side of the conductor block 5 is integrally formed with a terminal block 15, and the top outer wall of the terminal block 15 is provided with a wiring hole 16, and the wiring hole 16 is used for connecting the wire.

[0023] Working principle: When the fuse tube 7 needs to be replaced, the hexagonal wrench is inserted into the hexagonal hole of the rotating block 8, and the rotating block 8 is rotated, so that the rotating block 8 drives the double-threaded screw 2 to rotate, and the rotation of the double-threaded screw 2 drives the two sliders 3 to move away from each other, thereby making the two conductor blocks 5 move away from each other, so that the fuse tube 7 and the conductor block 5 are separated, and the fuse tube 7 can be easily replaced at this time; one end of the intact fuse tube 7 is inserted into the insertion hole 6 of one of the conductor blocks 5, and the double threaded screw 2 is rotated by the rotating block 8. The patterned screw 2 is reversed, so that the two conductor blocks 5 are close to each other, and the other end of the fuse tube 7 is inserted into the inside of the plug hole 6 of the other conductor block 5. At this time, the two ends of the fuse tube 7 are respectively in electrical contact with the two conductor blocks 5. In the process of the two conductor blocks 5 approaching each other, the end of the fuse tube 7 contacts and squeezes the conductor column 11, so that the conductor column 11 compresses the spring 13, and at the same time, one end of the slide rod 12 extends out of the conductor block 5, and the identification line 22 outside the slide rod 12 is exposed. At this time, the replacement of the fuse tube 7 can be completed.

[0024] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A current limiting fuse that is easy to maintain, characterized in that: The invention comprises a mounting shell (1), wherein a double-threaded screw (2) is connected to the inside of the mounting shell (1) via a bearing, one end of the double-threaded screw (2) extends to the outside of the mounting shell (1) and is fixed with a rotating block (8), the outside of the double-threaded screw (2) is connected to two sliders (3) via threads, the two sliders (3) are located inside the mounting shell (1), a connecting seat (4) is provided on one side of the mounting shell (1), the bottom of the connecting seat (4) is fixed to the sliders (3), an insulator (10) is fixed on the top of the connecting seat (4), a conductor block (5) is fixed on the top of the insulator (10), a plug-in hole (6) is opened on the outer wall of one side of the conductor block (5), a fuse tube (7) is provided between the two conductor blocks (5), and the two ends of the fuse tube (7) are plugged into the inside of the plug-in hole (6).

2. The easily maintainable current limiting fuse according to claim 1, characterized in that: A slide rail (9) is fixed to the top inner wall of the installation shell (1), a slide groove (21) is formed on the top outer wall of the sliding block (3), and the slide rail (9) is located inside the slide groove (21).

3. The easily maintainable current limiting fuse according to claim 1, characterized in that: A conductor column (11) and a spring (13) are arranged inside the plug hole (6); the spring (13) is located on a side of the conductor column (11) away from the fuse tube (7); a slide bar (12) is fixed to an outer wall of one side of the conductor column (11); one end of the slide bar (12) extends to the outside of the conductor block (5) and is fixed with a stopper (14); and an identification line (22) is arranged on an outer wall of one side of the slide bar (12).

4. The easily maintainable current limiting fuse according to claim 2, characterized in that: The inner wall of the slide groove (21) is provided with a receiving hole (17), and a graphite block (18) is fixed inside the receiving hole (17).

5. The easily maintainable current limiting fuse according to claim 1, characterized in that: A wiring board (15) is integrally formed on one side outer wall of the conductor block (5), and a wiring hole (16) is formed on the top outer wall of the wiring board (15).

6. The easily maintainable current limiting fuse according to claim 1, characterized in that: A mounting plate (19) is integrally formed on the bottom outer wall of the mounting shell (1), and a mounting hole (20) is formed on the top outer wall of the mounting plate (19).

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