阅读说明：本技术 一种多熔体熔断器及其制作方法 (Multi-fuse-element fuse and manufacturing method thereof ) 是由 陈聪莉 赵希华 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种多熔体熔断器,包括：管壳、上外帽、下外帽、熔体,管壳与外帽之间还设有焊接盘,焊接盘上分别设有多个条形通孔,熔体设有多条,多条熔体的两端分别焊接连接焊接盘上的条形通孔,本发明还公开一种多熔体熔断器制作方法,将熔体焊接在焊接盘上,然后填入灭弧介质并振动填实,焊接位置在上下焊接盘上一一对应,多个熔体在管壳内平行排列；因此,本发明减少内帽开模的费用与周期,减少了加工难度,减小了成本,提高了效率,同时,本发明采用多个长条孔的方式,可焊接更多的熔体,熔断器的额定电流因而可以做的更大,熔体的熔片可以做的更薄,使得熔断器开断更加容易,提高了熔断器的灵敏度,同时增加了熔断器的电流适用范围。(The invention discloses a multi-fuse, comprising: the invention further discloses a manufacturing method of the multi-melt fuse, which comprises the steps of welding the melts on the welding discs, then filling arc extinguishing media into the melts and filling the melts in a vibration mode, wherein the welding positions correspond to the upper welding disc and the lower welding disc one by one, and the melts are arranged in parallel in the tube shell; therefore, the invention reduces the cost and the period of opening the inner cap, reduces the processing difficulty, reduces the cost and improves the efficiency, and simultaneously, the invention adopts a mode of a plurality of strip holes, can weld more melts, the rated current of the fuse can be larger, the fuse link of the melt can be thinner, the fuse is easier to open and close, the sensitivity of the fuse is improved, and the current application range of the fuse is enlarged.)

1. A multi-fuse, comprising: the pipe shell comprises a pipe shell (1), an upper outer cap (2), a lower outer cap (3) and a melt (4), wherein the pipe shell (1) is cylindrical, and is characterized in that an upper welding disc (5) is further arranged between the upper end of a cylinder of the pipe shell (1) and the upper outer cap (2), a lower welding disc (6) is further arranged between the lower outer cap (3) and the lower end of the cylinder of the pipe shell (1), the upper welding disc (5) and the lower welding disc (6) are disc-shaped, a plurality of strip-shaped through holes (7) are respectively arranged on the upper welding disc (5) and the lower welding disc (6), the strip-shaped through holes (7) are equal in size and same in position on the upper welding disc (5) and the lower welding disc (6), the melt (4) is provided with a plurality of strips, the two ends of the plurality of the melt (4) are respectively welded with the strip-shaped through holes (7) on the upper welding disc (5) and the lower welding disc (6), the upper outer cap (2) is in conductive connection with the upper welding disc (5), and the lower outer cap (3) is in conductive connection with the lower welding disc (6).

2. The fuse and the manufacturing method thereof as claimed in claim 1, wherein the upper end and the lower end of the cylinder of the tube case (1) are respectively provided with positioning slots (8) distributed around the circumference of the cylinder, the upper welding plate (5) is annularly provided with an upper fixing claw (9) protruding downwards, the lower welding plate (6) is annularly provided with a lower fixing claw (10) protruding upwards, the upper fixing claw (9) and the lower fixing claw (10) are the same as the positioning slots (8) in position and size, and when the upper welding plate (5) and the lower welding plate (6) are fastened to the two ends of the cylinder of the tube case (1), the upper fixing claw (9) and the lower fixing claw (10) are respectively fastened and positioned in the positioning slots (8).

3. A fuse as per claim 2, characterised in that the clearance fit is used between the upper fixing claw (9) and the positioning slot (8) and between the lower fixing claw (10) and the positioning slot (8).

4. A fuse as per claim 1 and its manufacturing method, characterized in that the said upper welding disk (5) has medium injection hole (11) to open the two end faces of the upper welding disk (5).

5. A fuse as per claim 1, characterized in that, the inner cavity of said upper outer cap (2) and the upper welding disc (5) are in clearance fit, the upper outer cap (2) and the upper end of the case (1) are in interference fit; the inner cavity of the lower outer cap (3) is in clearance fit with the lower welding disc (6), and the lower outer cap (3) is in interference fit with the lower end of the tube shell (1).

6. A method of fabricating a multi-fuse according to any one of claims 1 to 5 including the steps of:

the method comprises the following steps: the lower welding disc (6) is buckled at the lower end of the cylinder of the tube shell (1);

step two: the melt (4) penetrates into the tube shell (1) from the upper end of the cylinder and then penetrates out of the strip-shaped through hole (7) of the lower welding disc (6);

step three: welding the lower end of the melt (4) penetrating out in the step two on a lower welding disc (6);

step four: repeating the second step and the third step until the lower ends of all the plurality of melts (4) penetrate out of the strip-shaped through holes (7) and are welded on the lower welding disc (6);

step five: the lower outer cap (3) is tightly connected to the lower end of the tube shell (1) and good electric conductivity of the lower outer cap (3) and the lower welding disc (6) is ensured;

step six: the upper welding disc (5) is buckled, and the upper ends of all the plurality of melts (4) penetrate out of the strip-shaped through holes (7) of the upper welding disc (5);

step seven: welding the upper ends of all the plurality of melts (4) on an upper welding disc (5);

step eight: arc extinguishing medium is filled in the medium injection hole (11) and is filled in by vibration;

step nine: the upper outer cap (2) is tightly connected to the upper end of the tube shell (1) and the electric conductivity of the upper outer cap (2) and the upper welding disc (5) is ensured to be good;

step ten: and sealant is coated at the joint of the lower outer cap (3) and the tube shell (1) and the joint of the upper outer cap (2) and the tube shell (1).

7. A method for manufacturing a multi-fuse according to claim 6, wherein in the fifth step, the lower outer cap (3) is press-fitted to the case (1), and in the ninth step, the upper outer cap (2) is press-fitted to the case (1).

8. A method for manufacturing a multi-fuse-element according to claim 6, characterized in that the welding position of the upper end of the fuse-element (4) on the upper welding plate (5) in the seventh step is in one-to-one correspondence with the welding position of the fuse-element (4) on the lower welding plate (6) in the fourth step, and the plurality of fuse-elements (4) are arranged in parallel in the tube shell (1).

Technical Field

The invention belongs to the technical field of fuses, and particularly relates to a multi-fuse-element fuse and a manufacturing method thereof.

Background

The fuse is an electric appliance which fuses a melt by heat generated by itself to open a circuit when a current exceeds a predetermined value. The fuse melts the melt by the heat generated by the fuse after the current exceeds a specified value for a period of time, so as to cut off the circuit; a current protector is made by applying the principle. The fuse is widely applied to high and low voltage distribution systems, control systems and electric equipment, and is one of the most commonly applied protection devices as a short circuit and overcurrent protector. The fuse basically comprises end caps sleeved at two ends of a porcelain tube, a fuse wire connected between the end caps, and fuse filler filled between the fuse wire and the inner wall of the porcelain tube.

The circular tube fuse in the market at present comprises an inner cap, an outer cap, a tube shell, a melt, an arc extinguishing medium, the melt and the like, the inner cap and the outer cap are thin in wall thickness, the fuse can be manufactured generally by opening a die, the requirement on the matching size is very strict, and the fuse is high in cost and long in period for non-standard products with small quantity. In addition, in the traditional round tube fuse, the inner cap welding holes are mostly round holes, in order to weld more melts, the size of the inner cap welding holes is generally close to the inner diameter of a tube shell, the melts are welded on the inner cap holes, the space is limited, the welding quantity is small, the rated current of the fuse needs to be increased, the thickness of the melts can be only thickened, and the breaking is difficult, so the rated current of the fuse is difficult to be increased; in addition, the size of the welding hole of the inner cap is close to the inner diameter of the tube shell, so that the melt is easy to be attached to the tube shell, the tube shell is locally heated and cracked, and even the fuse is damaged. Therefore, how to produce and process a non-standard fuse with larger rated current with low cost and high efficiency is urgently needed by the market.

Disclosure of Invention

The present invention provides a multi-fuse comprising: the tube, go up outer cap, lower outer cap, the fuse-element, the tube is cylindricly, still be equipped with the welding dish between the drum upper end of tube and the last outer cap, still be equipped with down the welding dish down between the drum lower extreme of outer cap and tube down, it is discoid to go up the welding dish, it is discoid to weld the dish down, go up the welding dish, be equipped with a plurality of bar through-holes on the welding dish down respectively, the bar through-hole is equal with the same size in position on the welding dish down at last welding dish, the fuse-element is equipped with many, the both ends of many fuse-elements are respectively the welding connection go up the welding dish, the bar through-hole on the welding dish down, go up outer cap conductive connection and go up the welding dish, welding dish down outer cap conductive connection.

Preferably, the upper end and the lower end of the cylinder of the tube shell are respectively provided with a positioning groove distributed around the circumference of the cylinder, the upper welding plate is annularly provided with an upper fixing claw protruding downwards, the lower welding plate is annularly provided with a lower fixing claw protruding upwards, the upper fixing claw and the lower fixing claw are equal to the positioning groove in position and size, and when the upper welding plate and the lower welding plate are buckled at the two ends of the cylinder of the tube shell, the upper fixing claw and the lower fixing claw are respectively clamped and positioned in the positioning grooves.

Preferably, clearance fit is adopted between the upper fixed claw and the positioning groove and between the lower fixed claw and the positioning groove.

Preferably, the upper welding disc is provided with a medium injection hole which is opened through two end faces of the upper welding disc.

Preferably, the inner cavity of the upper outer cap is in clearance fit with the upper welding disc, and the upper outer cap is in interference fit with the upper end of the tube shell; the inner cavity of the lower outer cap is in clearance fit with the lower welding disc, and the lower outer cap is in interference fit with the lower end of the tube shell.

The invention also discloses a manufacturing method of the multi-fuse-element fuse, which comprises the following steps:

the method comprises the following steps: the lower welding disc is buckled at the lower end of the cylinder of the pipe shell;

step two: penetrating the melt into the tube shell from the upper end of the cylinder and then penetrating out of the strip-shaped through hole of the lower welding disc;

step three: welding the lower end of the melt penetrating out in the step two on a lower welding disc;

step four: repeating the second step and the third step until the lower ends of all the plurality of melts penetrate out of the strip-shaped through holes and are welded on the lower welding disc;

step five: the lower outer cap is tightly connected to the lower end of the tube shell, and the good electric conductivity of the lower outer cap and the lower welding disc is ensured;

step six: the upper welding disc is buckled, and the upper ends of all the plurality of melts penetrate out of the strip-shaped through holes of the upper welding disc;

step seven: welding the upper ends of all the plurality of melts on an upper welding disc;

step eight: filling arc extinguishing medium from the medium injection hole and vibrating to fill;

step nine: the upper outer cap is tightly connected to the upper end of the tube shell, and the good electric conductivity of the upper outer cap and the upper welding disc is ensured;

step ten: and (3) coating sealant at the joint of the lower outer cap and the pipe shell and the joint of the upper outer cap and the pipe shell.

Preferably, in the fifth step, the lower outer cap is connected with the tube shell in a press-in manner, and in the ninth step, the upper outer cap is connected with the tube shell in a press-in manner.

Preferably, the welding positions of the upper ends of the melts welded on the upper welding plate in the seventh step correspond to the welding positions of the melts welded on the lower welding plate in the fourth step one by one, and the plurality of melts are arranged in parallel in the tube shell.

The invention has the beneficial effects that:

1. the invention adopts the welding disc and the pipe shell to be matched and fixed with the upper and lower fixed claws through the positioning groove, thereby reducing the cost and the period of opening the inner cap.

2. The welding disc is provided with the hole in the middle, more fuse bodies can be welded by adopting a mode of a plurality of long holes, the rated current of the fuse can be larger, and the fuse pieces of the fuse bodies can be thinner, so that the fuse bodies can be more easily disconnected, the sensitivity of the fuse bodies is improved, and the current application range of the fuse bodies is enlarged.

3. The fuse is welded at the opening of the welding disk, and the plurality of fuses are arranged in parallel, so that the fuse is centered, the failure caused by the fact that the fuse is close to the tube shell is avoided, and meanwhile, the danger that the fuse is exploded even due to the fact that the tube shell is locally heated and cracked is avoided, and the fuse has higher safety.

4. The invention uses the sealant to coat the sealant on the joints at the two ends of the fuse for sealing, thereby avoiding the fuse from being affected with damp and improving the service life and the reliability of the fuse.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments of the present invention or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a perspective exploded view of a multiple fuse element;

FIG. 2 is a perspective view of the cartridge;

FIG. 3 is a perspective view of the upper bonding pad;

FIG. 4 is a perspective view of the assembly of the tube shell, the upper and lower welding disks and the melt before welding;

FIG. 5 is a perspective view of the upper weld plate after welding is completed;

fig. 6 is a perspective view of a welding process.

In the figure, 1, a tube shell; 2. an upper outer cap; 3. a lower outer cap; 4. melting the materials; 5. mounting a welding disc; 6. a lower welding plate; 7. a strip-shaped through hole; 8. positioning a groove; 9. an upper fixed jaw; 10. a lower fixed jaw; 11. a medium is injected into the hole.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the present invention. The terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

As shown in fig. 1-6, the present invention provides a multi-fuse comprising: the method comprises the following steps: tube 1, go up outer cap 2, lower outer cap 3, fuse-element 4, tube 1 is cylindricly, still be equipped with welding plate 5 between the drum upper end of tube 1 and the last outer cap 2, still be equipped with down welding plate 6 between the drum lower extreme of lower outer cap 3 and tube 1, go up welding plate 5, lower welding plate 6 is discoid, go up welding plate 5, be equipped with a plurality of bar through-holes 7 on the welding plate 6 respectively down, bar through-hole 7 is the same size in the same position on last welding plate 5 and the lower welding plate 6, fuse-element 4 is equipped with many, the both ends of many fuse-elements 4 are respectively welded connection and are gone up welding plate 5, the bar through-hole 7 on the lower welding plate 6, go up outer cap 2 electrically conductive connection and go up welding plate 5, lower outer cap 3 electrically conductive connection lower welding plate 6.

Furthermore, the upper end and the lower end of the cylinder of the tube shell 1 are respectively provided with a positioning groove 8 distributed around the circumference of the cylinder, the upper welding disc 5 is annularly provided with an upper fixing claw 9 protruding downwards, the lower welding disc 6 is annularly provided with a lower fixing claw 10 protruding upwards, the upper fixing claw 9, the lower fixing claw 10 and the positioning groove 8 are equal in position and size, and when the upper welding disc 5 and the lower welding disc 6 are buckled at the two ends of the cylinder of the tube shell 1, the upper fixing claw 9 and the lower fixing claw 10 are respectively clamped and positioned in the positioning groove 8.

Furthermore, clearance fit is adopted between the upper fixing claw 9 and the positioning groove 8, and between the lower fixing claw 10 and the positioning groove 8.

Furthermore, the upper welding plate 5 is provided with a medium injection hole 11 which is opened through two end faces of the upper welding plate 5.

Further, the inner cavity of the upper outer cap 2 is in clearance fit with the upper welding disc 5, and the upper outer cap 2 is in interference fit with the upper end of the tube shell 1; the inner cavity of the lower outer cap 3 is in clearance fit with the lower welding disc 6, and the lower outer cap 3 is in interference fit with the lower end of the tube shell 1.

The invention also discloses a manufacturing method of the multi-fuse-element fuse, which comprises the following steps:

the method comprises the following steps: the lower welding disc 6 is buckled at the lower end of the cylinder of the tube shell 1;

step two: the melt 4 penetrates into the tube shell 1 from the upper end of the cylinder and then penetrates out of the strip-shaped through hole 7 of the lower welding disc 6;

step three: welding the lower end of the melt 4 penetrated out in the step two on a lower welding disc 6;

step four: repeating the second step and the third step until the lower ends of all the plurality of melts 4 penetrate out of the strip-shaped through holes 7 and are welded on the lower welding disc 6;

step five: the lower outer cap 3 is tightly connected to the lower end of the tube shell 1, and the good electric conductivity of the lower outer cap 3 and the lower welding disc 6 is ensured;

step six: the upper welding disc 5 is buckled, and the upper ends of all the plurality of melts 4 penetrate out of the strip-shaped through holes 7 of the upper welding disc 5;

step seven: welding the upper ends of all the plurality of melts 4 on an upper welding disc 5;

step eight: arc extinguishing medium is filled from the medium injection hole 11 and is filled in a vibration mode;

step nine: the upper outer cap 2 is tightly connected to the upper end of the tube shell 1, and the good electric conductivity of the upper outer cap 2 and the upper welding disc 5 is ensured;

step ten: sealant is applied to the joint of the lower outer cap 3 and the case 1 and the joint of the upper outer cap 2 and the case 1.

Further, in the fifth step, the connection mode of the lower outer cap 3 and the tube shell 1 is press-in connection of the outer cap, and in the ninth step, the connection mode of the upper outer cap 2 and the tube shell 1 is press-in connection of the outer cap.

Furthermore, the welding position of the upper end of the melt 4 welded on the upper welding plate 5 in the seventh step corresponds to the welding position of the melt 4 welded on the lower welding plate 6 in the fourth step one by one, and the plurality of melts 4 are arranged in parallel in the tube shell 1.

In conclusion, the multi-melt fuse and the manufacturing method thereof adopt the welding disc and the tube shell to be matched and fixed with the upper and lower fixed claws through the positioning grooves, so that the cost and the period of opening the inner cap are reduced, and the clearance fit is adopted, so that the tolerance requirement is reduced, the processing difficulty is reduced, the cost is reduced, and the efficiency is improved; meanwhile, a mode of a plurality of strip holes is adopted, more melts can be welded, rated current of the fuse can be made larger, and a fuse piece of the melts can be made thinner, so that the fuse is easier to break, the sensitivity of the fuse is improved, and the current application range of the fuse is enlarged; therefore, the invention has wide application prospect.

The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.

The above examples are only for illustrating the technical solutions of the present invention, and are not to be construed as limiting the present invention; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the present invention.