Cylindrical cap-shaped fuse structure with high locking force

Abstract

The utility model relates to a cylindrical cap-shaped fuse structure with high locking force, which comprises a shell, two inner end caps and two outer end caps, the two inner end caps are respectively sleeved at two ends of the shell along the length direction, one outer end cap is sleeved on one inner end cap, and the shell is riveted with the inner end caps and the outer end caps in a stamping manner. The inner end cap and the outer end cap are riveted with the shell in a stamping mode, so that the inner end cap and the outer end cap are stably connected to the shell.

Description

Technical Field

[0001] The present application relates to the field of fuses, and in particular to a cylindrical cap-shaped fuse structure with high locking force. Background Art

[0002] A fuse is an electrical device that uses the heat generated by itself to melt the fuse and disconnect the circuit when the current exceeds the specified value. A fuse is a current protector made based on the principle that after the current exceeds the specified value for a period of time, the heat generated by itself will melt the fuse and disconnect the circuit.

[0003] The Chinese patent with the authorization announcement number CN203277302U discloses a fast cylindrical cap-shaped fuse, the technical solution of which includes an insulating tube, a fuse, and a sealing cap. The insulating tube is provided with sealing caps at both ends, the fuse is located in the insulating tube, one end of the fuse is fixedly connected to one of the sealing caps, a semicircular ring buckle is provided in the other sealing cap, the other end of the fuse is connected to a spring hook, the spring hook is hooked on the semicircular ring buckle, the spring hook and the semicircular ring buckle are conductive materials, quartz sand is provided around the fuse, and sealant is applied on the contact surface between the sealing cap and the insulating tube. The utility model improves the protection of the cylindrical cap-shaped fuse on circuit safety and improves the current interception capacity of the cylindrical cap-shaped fuse.

[0004] With respect to the above-mentioned related technologies, the sealing cap is connected to the insulating tube through a sealant. After long-term use, the viscosity of the sealant decreases, so there is a possibility that the connection between the sealing cap and the insulating sleeve is unstable. Utility Model Content

[0005] In order to connect the outer end cap and the inner end cap to the housing through temperature, the present application provides a cylindrical cap-shaped fuse structure with high locking force.

[0006] The present application provides a high locking force cylindrical cap-shaped fuse structure adopts the following technical solution:

[0007] A cylindrical cap-shaped fuse structure with high locking force comprises a shell, an inner end cap and an outer end cap. Two inner end caps and two outer end caps are provided. The two inner end caps are respectively sleeved on the two ends of the shell along the length direction, and one outer end cap is sleeved on one inner end cap. The shell, the inner end cap and the outer end cap are stamped and riveted.

[0008] By adopting the above technical solution, the inner end cap and the outer end cap are stamped and riveted with the shell, so that the inner end cap and the outer end cap are stably connected to the shell.

[0009] Optionally, a first connecting groove is opened on both ends of the shell, the inner end cap is punched inward to form a cylindrical first protrusion, the first protrusion is embedded in the first connecting groove, and the outer end cap is punched inward to form a cylindrical second protrusion, and the second protrusion is embedded in the groove of the first protrusion.

[0010] By adopting the above technical solution, the inner end cap and the shell are riveted through the first protrusion and the first connecting groove, and the outer end cap and the inner end cap are riveted through the second protrusion and the groove of the first protrusion, thereby improving the overall stability of the fuse.

[0011] Optionally, a through hole is opened at one end of the inner end cap, and the through hole is connected to the shell. The inner end cap is separated from the outer end cap by a cavity along one end of the shell length direction. The through hole connects the shell and the cavity. A plurality of discs are arranged in the cavity. The plurality of discs are distributed in sequence along the shell length direction, and the discs are made of heat-resistant insulating material.

[0012] By adopting the above technical solution, during the disconnection test, the disc plays a role of heat insulation and insulation, which can effectively help the fuse pass the disconnection test and improve the disconnection test capability.

[0013] Optionally, the disc diameter is the same as the inner diameter of the inner end cap.

[0014] By adopting the above technical solution, the diameter of the disc is the same as the inner diameter of the inner end cap, thereby reducing the amplitude of the disc shaking in the cavity.

[0015] Optionally, the shell is provided with chamfers at both ends along its length direction, and the chamfers facilitate one end of the shell to be embedded in the inner end cap.

[0016] By adopting the above technical solution, one end of the shell is chamfered, so that it is more convenient and labor-saving when the inner end cap is sleeved on one end of the shell.

[0017] Optionally, a second connecting groove is provided on both ends of the shell, the second connecting groove is an annular groove, the circumference of the second connecting groove is consistent with the circumference of the shell, the opening end of the outer end cap is narrowed, and the opening end of the outer end cap enters the second connecting groove.

[0018] By adopting the above technical solution, the open end of the outer end cap enters the second connecting groove, which further enables the outer end cap to be stably connected to the shell.

[0019] Optionally, the outer diameter of the opening end of the outer end cap is less than or equal to the outer diameter of the shell.

[0020] By adopting the above technical solution, the outer diameter of the opening end of the outer end cap is smaller than the outer diameter of the shell, so as to avoid the sharp corner of the opening end of the outer end cap from being exposed as much as possible, thereby reducing the possibility of accidental injury to the operator when taking it.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The inner end cap and the outer end cap are riveted to the shell by stamping, the inner end cap and the shell are riveted by the first protrusion and the first connecting groove, and the outer end cap and the inner end cap are riveted by the second protrusion and the groove of the first protrusion, so as to improve the overall stability of the fuse, so that the inner end cap and the outer end cap are stably connected to the shell;

[0023] 2. Add a disc. During the breaking test, the disc plays a role of heat insulation and insulation, which can effectively help the fuse pass the breaking test and improve the breaking test capability;

[0024] 3. The open end of the outer end cap enters the second connecting groove, further making the outer end cap stably connected to the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional structural diagram of this embodiment.

[0026] Figure 2 It is a cross-sectional view of this embodiment, used to show the inner end cap and the disc.

[0027] Figure 3 This embodiment Figure 2 Enlarged view of part A.

[0028] Explanation of the reference numerals: 100, shell; 110, first connecting groove; 120, second connecting groove; 200, inner end cap; 210, first protrusion; 220, cavity; 230, through hole; 240, disc; 250, thermal insulation cotton; 300, outer end cap; 310, second protrusion. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 This application is described in further detail.

[0030] The embodiment of the present application discloses a cylindrical cap-shaped fuse structure with high locking force.

[0031] Reference Figure 1 and Figure 2A cylindrical cap-shaped fuse structure with high locking force includes a housing 100, two inner end caps 200, and an outer end cap 300. The two inner end caps 200 are respectively sleeved on both ends of the housing 100 along its length direction, and the central axis of the inner end caps 200 is collinear with the central axis of the housing 100. The two outer end caps 300 are respectively sleeved on both ends of the housing 100 along its length direction, and one outer end cap 300 is sleeved on one inner end cap 200, and the central axis of the outer end cap 300 is collinear with the central axis of the housing 100. The housing 100, the inner end cap 200, and the outer end cap 300 are stamped and riveted. The inner end cap 200, the outer end cap 300, and the housing 100 are stamped and riveted, so that the outer end cap 300, the inner end cap 200, and the housing 100 are stably connected.

[0032] Reference Figure 2 and Figure 3 The housing 100 has two first connection grooves 110 formed on its circumference. The two first connection grooves 110 are respectively disposed at both ends of the housing 100 along the length direction of the housing 100. The first connection groove 110 is an annular groove, and the circumference of the first connection groove 110 is consistent with the circumference of the housing 100. The inner end cap 200 is punched to form a cylindrical first protrusion 210. There are four first protrusions 210, and the four first protrusions 210 are sequentially spaced and distributed on the circumference of the inner end cap 200 along the circumference of the inner end cap 200. The first protrusion 210 is embedded in the first connection groove 110. The outer end cap 300 is punched to form a cylindrical second protrusion 310, and there are four second protrusions 310, and the four second protrusions 310 are sequentially spaced and distributed on the circumference of the outer end cap 300 along the circumference of the outer end cap 300. The second protrusion 310 is embedded in the groove of the first protrusion 210, and one second protrusion 310 corresponds to one first protrusion 210.

[0033] Reference Figure 1 and Figure 2 , two second connection grooves 120 are provided on the circumference of the shell 100, and the two second connection grooves 120 are respectively located at the two ends of the shell 100 along the length direction of the shell 100. The second connection groove 120 is an annular groove, and the circumference of the second connection groove 120 is consistent with the circumference of the shell 100, and the two second connection grooves 120 are arranged between the two first connection grooves 110. The opening end of the outer end cap 300 is configured to be constricted, and the opening end of the outer end cap 300 enters the second connection groove 120. The outer diameter of the opening end of the outer end cap 300 is less than or equal to the outer diameter of the shell 100. The opening end of the outer end cap 300 enters the second connection groove 120, thereby further improving the stability of the connection between the outer end cap 300 and the shell 100.

[0034] Reference Figure 2The inner end cap 200 has a cavity 220 between the outer wall at one end of the shell 100 and the inner wall of the outer end cap 300 along the length direction. The inner end cap 200 has a through hole 230 along the length direction of the shell 100. The depth direction of the through hole 230 is consistent with the length direction of the shell 100, and the through hole 230 connects the shell 100 and the cavity 220. The diameter of the through hole 230 is smaller than the inner diameter of the inner end cap 200. Two discs 240 are arranged in the cavity 220. The central axis of the disc 240 is colinear with the central axis of the shell 100, and the two discs 240 are distributed in sequence along the length direction of the shell 100. The diameter of the disc 240 is the same as the inner diameter of the inner end cap 200. The disc 240 is made of rubber or quartz.

[0035] The embodiment of the present application discloses a cylindrical cap-shaped fuse structure with high locking force. The implementation principle is as follows: when installing the inner end cap 200 and the outer end cap 300, the inner end cap 200 is sleeved on one end of the housing 100, and the outer end cap 300 is sleeved on the inner end cap 200 in sequence. The inner end cap 200 and the outer end cap 300 are stamped so that the inner end cap 200 forms a first protrusion 210, the outer end cap 300 forms a second protrusion 310, and the inner end cap 200 is formed. The inner end cap 200 and the outer end cap 300 are riveted to the shell 100 through the first connecting groove 110 and the first protrusion 210, and the inner end cap 200 and the outer end cap 300 are riveted to the shell 100 through the first protrusion 210 and the second protrusion 310, so that the inner end cap 200 and the outer end cap 300 are stably connected to the shell 100, and the open end of the outer end cap 300 is stamped to form a shrinkage, so that the open end of the outer end cap 300 is embedded in the second connecting groove 120, so that the outer end cap 300 is stably connected to the shell 100.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A cylindrical cap-shaped fuse structure with high locking force, characterized in that: The invention comprises a shell (100), an inner end cap (200), and an outer end cap (300), wherein two inner end caps (200) and two outer end caps (300) are provided, the two inner end caps (200) are respectively sleeved on two ends of the shell (100) along the length direction thereof, and one outer end cap (300) is sleeved on one inner end cap (200), and the shell (100), the inner end cap (200), and the outer end cap (300) are stamped and riveted.

2. A cylindrical cap-shaped fuse structure with high locking force according to claim 1, characterized in that: The shell (100) is provided with a first connection groove (110) on both ends of the circumference, the inner end cap (200) is punched inwardly to form a cylindrical first protrusion (210), the first protrusion (210) is embedded in the first connection groove (110), and the outer end cap (300) is punched inwardly to form a cylindrical second protrusion (310), the second protrusion (310) is embedded in the groove of the first protrusion (210).

3. A cylindrical cap-shaped fuse structure with high locking force according to claim 1, characterized in that: A through hole (230) is provided at one end of the inner end cap (200), the through hole (230) being in communication with the shell (100); a cavity (220) is provided at one end of the inner end cap (200) along the length direction of the shell (100) and spaced apart from the outer end cap (300); the through hole (230) is in communication with the shell (100) and the cavity (220); a plurality of discs (240) are provided in each of the cavities (220); the plurality of discs (240) are sequentially distributed along the length direction of the shell (100), and the discs (240) are made of a heat-resistant insulating material.

4. A cylindrical cap-shaped fuse structure with high locking force according to claim 3, characterized in that: The diameter of the disc (240) is the same as the inner diameter of the inner end cap (200).

5. A cylindrical cap-shaped fuse structure with high locking force according to claim 1, characterized in that: The shell (100) is provided with chamfers at both ends along its length direction, and the chamfers facilitate one end of the shell (100) to be embedded in the inner end cap (200).

6. A cylindrical cap-shaped fuse structure with high locking force according to claim 1, characterized in that: Second connection grooves (120) are provided on both ends of the shell (100), the second connection groove (120) is an annular groove, the circumference of the second connection groove (120) is consistent with the circumference of the shell (100), the opening end of the outer end cap (300) is narrowed, and the opening end of the outer end cap (300) enters the second connection groove (120).

7. A cylindrical cap-shaped fuse structure with high locking force according to claim 6, characterized in that: The outer diameter of the opening end of the outer end cap (300) is less than or equal to the outer diameter of the housing (100).

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