Novel fuse

Abstract

The utility model belongs to the technical field of fuses, and mainly relates to a novel fuse, which comprises a fusion tube and two contact knives, and each contact knife comprises an aluminum patch board, a copper wiring board and an aluminum line bank. The copper wiring board and the aluminum wiring bar are respectively connected to two axial sides of the aluminum wiring disc; mounting holes are formed in the aluminum connector bar; at least one of the two contact knives is provided with a sand filling hole, the sand filling hole penetrates through the aluminum patch board and the copper wiring board and is communicated with the inner cavity of the fusion tube, and the sand filling hole is detachably connected with a plug. The copper wiring board achieves the wiring function inside the fuse, the requirement for the electrical performance of the contact knife is met, under the improved year-on-year condition, the conductivity of the contact knife is reduced, but the improved conductivity still meets the requirement of a manufacturer, meanwhile, the price of an aluminum material is lower than that of a pure copper or copper-clad aluminum material, and the cost is low. And the production cost of the fuse is greatly reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of fuse, mainly relates to a new type fuse. BACKGROUND

[0002] The fuse is a kind of overcurrent protector, mainly by fusing body and fusing tube and additional filler etc. portion is composed. When using, fuse is connected in series in the protected circuit, when the current of the protected circuit exceeds the specified value, after a certain time, the heat generated by fusing body itself will melt fusing body, make circuit disconnect, thereby play the role of protection. Fuse has anti-time delay characteristic, when overload current is small, fusing time is long, when overload current is large, fusing time is short. Therefore in certain overload current range to current recovery normal, fuse will not melt, can continue to use. Fuse is widely used in high and low voltage distribution system, control system and electrical equipment, as the protector of short circuit and overcurrent, is one of the most common protective devices.

[0003] The device contact blade in the fuse is made of pure copper or copper-clad aluminum to meet its conductive performance, such as the Chinese patent for invention with the authorized announcement No. CN203339091U provides a fuse contact blade, including outer layer and inner core, outer layer wraps inner core, outer layer and inner core are connected together, the material of outer layer is copper, the material of inner core is aluminum alloy, the utility model copper uses the contact blade of copper-clad aluminum, and the conductive performance is good, but at the same time, the density of copper-clad aluminum is large, the weight is heavy and the price is expensive, so the manufacturing cost of fuse is greatly improved.

[0004] At present, the conductive performance required by manufacturers is low, therefore, in order to reduce the cost, under the condition of meeting the conductive performance, the utility model provides a new type fuse. UTILITY MODEL CONTENTS

[0005] The utility model provides a new type fuse to solve the problem of high cost of fuse caused by high cost of contact blade in prior art.

[0006] To solve the above problems, the utility model adopts the following technical scheme:

[0007] A new type fuse, including fusing tube and two contact blades connected on the upper and lower ends of fusing tube, the two contact blades are symmetrical about fusing tube, each contact blade includes aluminum terminal block, copper terminal plate and aluminum terminal strip, the copper terminal plate and aluminum terminal strip are connected on the axial two sides of aluminum terminal block respectively, and the copper terminal plate is connected with fusing tube, the aluminum terminal strip is provided with mounting hole, at least one of the two contact blades is provided with sand pouring hole, the sand pouring hole penetrates aluminum terminal block and copper terminal plate and communicates with the inner cavity of fusing tube, and the sand pouring hole is detachably connected with plug.

[0008] Beneficial effects: the utility model discloses copper terminal block, aluminium terminal block and aluminium terminal strip, copper terminal block and aluminium terminal strip are connected in the axial both sides of aluminium terminal block respectively, copper terminal block is connected with the pipe of melting, and the internal wiring of the fuse is realized by copper terminal block, meets the requirement of the electrical performance of contact blade, and the conductivity of contact blade can still satisfy the demand of manufacturer under the condition of the same ratio of improvement, and does not influence the product performance, and the price of aluminium material is lower than pure copper or copper clad aluminium material, greatly reduces the cost in the production of contact blade, and then reduces the production cost of fuse; aluminium terminal strip is equipped with mounting hole to facilitate the installation of fuse, and at least one contact blade is equipped with sand filling hole in two contact blades, and sand filling hole penetrates aluminium terminal block and copper terminal block and is communicated with the inner chamber of the pipe of melting, and the plug of sand filling hole can be detachably connected, and the required quartz sand can be filled into the pipe of melting through sand filling hole after the plug is opened, and the plug can be covered after filling, and the operation is simple.

[0009] Further, the copper terminal block is circular, and the aluminium terminal block and the copper terminal block have the same diameter and are coaxially connected.

[0010] Beneficial effects: the copper terminal block is circular, and is convenient for being connected with the cylindrical fuse body; the aluminium terminal block and the copper terminal block have the same diameter and are coaxially connected, and the appearance is simple,

[0011] Further, the thickness of the copper terminal block is less than the thickness of the aluminium terminal block.

[0012] Beneficial effects: the thickness of the copper terminal block is less than the thickness of the aluminium terminal block, and the use of copper material is further reduced, and the cost is reduced.

[0013] Further, the aluminium terminal strip is rectangular, and the aluminium terminal strip and the aluminium terminal block are perpendicularly connected.

[0014] Further, the mounting hole is a waist-shaped hole.

[0015] Beneficial effects: compared with a round hole, the waist-shaped hole can reduce the use of material on the basis of maintaining structural strength, thereby reducing weight and cost; the appearance design of the waist-shaped hole can make the product more beautiful, especially in occasions requiring mechanical design display.

[0016] Further, the sand filling holes are arranged on the circumference of the aluminium terminal block.

[0017] Further, the sand filling holes are arranged on the circumference of the aluminium terminal block.

[0018] Beneficial effects: multiple sand filling holes speed up the sand filling speed and improve work efficiency.

[0019] Further, the multiple sand filling holes are equally spaced on the circumference of the aluminium terminal block.

[0020] Beneficial effect: multiple sand holes are arranged equidistantly in the circumferential direction of the aluminum terminal block, beautifying the appearance.

[0021] Further, the aluminum terminal block, copper terminal plate and aluminum terminal strip are all provided with chamfers to prevent scratching.

[0022] Beneficial effect: the chamfer can reduce the scratching of the surface of the measured object by the contact probe when contacting the measured object, especially for the surface of precision or soft material; the chamfer makes the contact probe more easily inserted into the gap between the measured object and the measuring equipment, reducing the damage caused in the insertion process.

[0023] Further, the aluminum terminal block and the copper terminal plate are fixed together by friction welding.

[0024] Beneficial effect: friction welding does not require filler materials such as welding rods or welding wires, reducing material costs and cleaning work after welding; since the welding parameters can be accurately controlled, the quality of each weld is very consistent, reducing quality fluctuations and beautifying the appearance. BRIEF DESCRIPTION OF DRAWINGS

[0025] The above and other objects, features and advantages of the present embodiments will become more apparent from the following detailed description read in conjunction with the accompanying drawings. In the drawings, several embodiments of the present disclosure are illustrated by way of example and not limitation in which like reference numerals represent similar, or corresponding parts, wherein:

[0026] Figure 1 is a structural schematic view of the present disclosure;

[0027] Figure 2 is a structural schematic view of the contact probe;

[0028] Figure 3 is a top view of the contact probe.

[0029] BRIEF DESCRIPTION OF DRAWINGS

[0030] 1, aluminum terminal strip; 2, mounting hole; 3, chamfer; 4, aluminum terminal block; 5, copper terminal plate; 6, sand hole; 7, melting pipe; 8, contact probe. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present disclosure will be described clearly and completely below with reference to the drawings in the embodiments of the present disclosure. Those skilled in the art should know that the embodiments described below are only part of the embodiments of the present disclosure, not all the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present disclosure.

[0032] The various non-limiting embodiments of the utility model will be described in detail below. Any element quantity in the drawings is used for example but not limitation, and any naming is only used for distinction but not any limiting meaning. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0033] The utility model provides a novel fuse's embodiment 1:

[0034] As shown in Figure 1 and Figure 2 , a novel fuse includes fuse tube 7 and two contact knives 8 welded on the upper and lower ends of fuse tube 7, two contact knives 8 are symmetrical about fuse tube 7, and each contact knife 8 includes aluminum terminal block 4, copper terminal plate 5 and aluminum terminal strip 1.

[0035] As shown in Figure 1 and Figure 2 , copper terminal plate 5 is welded with fuse tube 7, one end of copper terminal plate 5 away from fuse tube 7 is connected with aluminum terminal block 4, copper terminal plate 5 is circular, aluminum terminal block 4 and copper terminal plate 5 are coaxially connected with the same diameter, the connection mode of aluminum terminal block 4 and copper terminal plate 5 is friction welding, which does not need filler materials such as welding rod or welding wire, thereby reducing material cost and cleaning work after welding; since welding parameters can be accurately controlled, the quality of each weld is very consistent, thereby reducing quality fluctuation and beautifying appearance. The thickness of copper terminal plate 5 is less than that of aluminum terminal block 4, further reducing the use of copper material and reducing the production cost of fuse.

[0036] As shown in Figure 3 , two sand filling holes 6 are arranged on each contact knife 8, sand filling hole 6 penetrates aluminum terminal block 4 and copper terminal plate 5 and communicates with the inner cavity of fuse tube 7, and two sand filling holes 6 are arranged at equal intervals in the circumferential direction of aluminum terminal block 4 and copper terminal plate 5. Sand filling hole 6 is circular, and a plug adapted to sand filling hole 6 is inserted in sand filling hole 6. After the plug is removed, the required quartz sand can be filled into fuse tube 7 through sand filling hole 6, and after filling, the plug can be inserted to close fuse tube 7, which is convenient to disassemble and easy to operate.

[0037] As shown in Figure 1 and Figure 2As shown in the drawings, the aluminum wiring panel 1 is rectangular, vertically connected to one end of the aluminum wiring panel 4 away from the copper wiring plate 5, and integrally formed with the aluminum wiring panel 4, and is provided with a mounting hole 2 for facilitating installation of the fuse contact blade 8.

[0038] As shown in the drawings, the aluminum wiring panel 4, the copper wiring plate 5 and the aluminum wiring panel 1 are all processed with a chamfer 3, which can reduce the scratch of the contact blade 8 on the surface when contacting the measured object, especially for the surface of precision or soft material; the chamfer 3 makes the contact blade 8 more easily inserted into the gap between the measured object and the measuring equipment, reducing the damage that may be caused during the insertion process. Figure 1 Figure 2 As shown in the drawings, the aluminum wiring panel 4, the copper wiring plate 5 and the aluminum wiring panel 1 are all processed with a chamfer 3, which can reduce the scratch of the contact blade 8 on the surface when contacting the measured object, especially for the surface of precision or soft material; the chamfer 3 makes the contact blade 8 more easily inserted into the gap between the measured object and the measuring equipment, reducing the damage that may be caused during the insertion process.

[0039] The working process of the utility model is as follows:

[0040] In use, the aluminum wiring panel 4 and the copper wiring plate 5 are welded together, the two contact blades 8 are welded to the upper and lower ends of the fuse tube 7 respectively, the plug of the sand pouring hole 6 is removed, quartz sand is poured into the fuse tube 7, and then the plug is plugged again to close the fuse tube 7, and the fuse is fixed to the specified position and connected to the circuit through the mounting hole 2 of the two contact blades 8.

[0041] The utility model adopts the copper wiring plate 5, the aluminum wiring panel 4 and the aluminum wiring panel 1, realizes the wiring function inside the fuse by the copper wiring plate 5, meets the requirement of the electrical performance of the contact blade 8, and the electrical conductivity of the improved contact blade 8 still meets the demand of the manufacturer under the same ratio, and does not affect the product performance, meanwhile, the price of the aluminum material is lower than that of pure copper or copper-clad aluminum material, greatly reduces the cost in the production of the contact blade 8, and further reduces the production cost of the fuse; the mounting hole 2 is arranged on the aluminum wiring panel 1 to facilitate the installation of the fuse contact blade 8, and the plug that is detachable and matched with the sand pouring hole 6 is plugged in the sand pouring hole 6, the plug is removed to pour the required quartz sand into the fuse tube 7 through the sand pouring hole 6, and the plug is covered after pouring to close the fuse tube 7, and the operation is simple.

[0042] The utility model provides a kind of new fuse of embodiment 2:

[0043] The difference between it and embodiment 1 is mainly as follows: in embodiment 1, two sand pouring holes are arranged on each contact blade. In this embodiment, only one of the two contact blades can be provided with two sand pouring holes.

[0044] The utility model provides a kind of new fuse of embodiment 3:​

[0045] The difference from Example 1 is mainly that, in Example 1, the mounting hole is a waist-shaped hole and the sand pouring hole is a circular hole. In this example, the mounting hole and the sand pouring hole can also be of a type other than the waist-shaped hole and the circular hole, such as a square hole.

Claims

1. A new type of fuse, characterized in that, The fuse tube and two contact blades connected to the upper and lower ends of the fuse tube, the two contact blades are symmetrical about the fuse tube, each contact blade comprises an aluminum terminal block, a copper terminal plate and an aluminum terminal strip; The copper terminal plate and the aluminum terminal strip are connected to the axial two sides of the aluminum terminal block respectively, and the copper terminal plate is connected to the fuse tube; The aluminum terminal strip is provided with a mounting hole; At least one of the two contact blades is provided with a sand pouring hole, the sand pouring hole penetrates the aluminum terminal block and the copper terminal plate and communicates with the inner cavity of the fuse tube, and a plug is detachably connected to the sand pouring hole.

2. A new type of fuse according to claim 1, characterized in that, The copper terminal plate is circular, the aluminum terminal block and the copper terminal plate have the same diameter and are coaxially connected.

3. A new type of fuse according to claim 2, characterized in that, The thickness of the copper terminal plate is less than that of the aluminum terminal block.

4. A new type of fuse according to claim 3, characterized in that, The aluminum terminal strip is rectangular, and the aluminum terminal strip is perpendicularly connected to the aluminum terminal block.

5. A new type of fuse according to claim 4, characterized in that, The mounting hole is a waist-shaped hole.

6. A new type of fuse according to any one of claims 1-5, characterized in that, Both of the two contact blades are provided with a sand pouring hole, and the sand pouring hole is circular.

7. A new type of fuse according to claim 6, characterized in that, The aluminum terminal block is provided with a plurality of sand pouring holes in the circumferential direction.

8. A new type of fuse according to claim 7, characterized in that, The plurality of sand pouring holes are arranged at equal intervals in the circumferential direction of the aluminum terminal block.

9. A new type of fuse according to any one of claims 1-5, characterized in that, The aluminum terminal block, the copper terminal plate and the aluminum terminal strip are all provided with chamfers for preventing scratching.

10. A new type of fuse according to any one of claims 1-5, characterized in that, The aluminum terminal block and the copper terminal plate are fixed together by friction welding.

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