Fuse tube fixing structure and fuse

Abstract

The utility model belongs to the technical field of low-voltage electric appliances, and discloses a fixing structure of a fuse tube and a fuse. The fixing structure of the fuse tube comprises a fuse support, the fuse tube and a wire pressing buckle. The fuse support is provided with a containing groove extending in the first direction, two supporting arms distributed in the first direction at intervals are arranged in the containing groove, and when the fuse tube is arranged in the containing groove, the fuse tube is elastically clamped between the two supporting arms; the number of the wire pressing buckles is two, the two wire pressing buckles are arranged at the two ends of the fuse support at intervals in the first direction, and the wire pressing buckles abut against the ends, away from the fuse tube, of the corresponding supporting arms. The fuse tube is arranged in the containing groove and elastically clamped between the two supporting arms, so that the fuse tube is convenient to install, the wire pressing buckle is arranged at the end of the fuse support and can abut against the ends, away from the fuse tube, of the supporting arms, the supporting arms are limited, and the situation that the fuse tube is not firmly installed due to looseness of the supporting arms is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a fixing structure of a fuse tube and a fuse. Background Art

[0002] A fuse is an electrical appliance used to connect the branches of a cable convergence and provide protection.

[0003] In the prior art, the fuse tube of the fuse is installed in a receiving groove on the fuse holder, and the fuse tube is elastically clamped by two spring pieces arranged in the receiving groove. After long-term use, the elastic force of the spring pieces will decrease, which will cause the fuse tube to be installed loosely and affect the service life of the fuse. Utility Model Content

[0004] The utility model aims to provide a fixing structure of a fuse tube and a fuse, so as to improve the installation firmness of the fuse tube and prolong the service life of the fuse.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The fixing structure of the fuse tube includes:

[0007] A fuse holder, provided with a receiving groove extending along a first direction, and two supporting arms spaced apart along the first direction are provided in the receiving groove;

[0008] A fuse tube is arranged in the containing groove, and the fuse tube is placed between the two supporting arms, and the two supporting arms elastically clamp the fuse tube;

[0009] There are two wire pressing buckles, which are arranged at intervals at two ends of the fuse bracket along the first direction, and the wire pressing buckles press the corresponding end of the support arm away from the fuse tube.

[0010] As an optional solution for the fixing structure of the fuse tube, each of the support arms includes two short arms, the two short arms are spaced apart along the second direction and are respectively connected to the side walls of the accommodating groove, and the two end surfaces of the fuse tube along the first direction are respectively elastically abutted against the corresponding two short arms;

[0011] The first direction and the second direction are perpendicular to each other.

[0012] As an optional solution for the fixing structure of the fuse tube, a protruding contact portion abutting against an end surface of the fuse tube is provided at one end of the short arm facing the fuse tube.

[0013] As an alternative solution for the fixing structure of the fuse tube, the wire pressing buckle includes a main body portion and two supporting rib plates arranged at one end of the main body portion facing the fuse tube. The main body portion is fixedly connected to the fuse support, and the two supporting rib plates respectively press against the two corresponding short arms.

[0014] As an alternative solution for the fixing structure of the fuse tube, the fuse support is an injection molded part.

[0015] A fuse, used for connecting two cables. The fuse includes the fixing structure of the fuse tube in any of the above solutions. The wire cores of the two cables are respectively connected to the two end portions of the fuse tube along the first direction, and each wire core is clamped between the corresponding supporting arm and the end face of the fuse tube. A clamping space is formed between the wire pressing buckle and the fuse tube, and the cable is fixedly clamped in the clamping space.

[0016] As an alternative solution for the fuse, the fuse further includes a housing and two pressure caps. The housing is provided with a through hole extending along the first direction, the fuse support is snap-fitted in the through hole, the two pressure caps are respectively buckled on the two ends of the housing along the first direction, and the pressure caps are snap-fitted with the housing. The pressure cap is provided with a second through hole for passing through the insulating portion of the cable.

[0017] As an alternative solution for the fuse, at least two first limiting blocks distributed in a circumferential manner are arranged on the inner wall of one end portion of the through hole, and the first limiting block is provided with a card slot;

[0018] At least one end face of the fuse support along the first direction is provided with a buckle corresponding to the first limiting block. The buckle includes an extending portion and a hook connected to each other. The extending portion is connected to the end face of the fuse support, the hook is arranged at one end of the extending portion away from the fuse support, the extending portion is limited in the card slot, and the first limiting block is limited between the hook and the end face of the fuse support.

[0019] As an alternative solution for the fuse, first protruding limiting portions and second protruding limiting portions distributed in a circumferential manner are arranged on the outer walls of the two end portions of the housing;

[0020] The side wall of the pressure cap is provided with a limiting slot hole corresponding to the first protruding limiting portion, and the end face of the side wall of the pressure cap facing the housing is provided with a concave slot corresponding to the second protruding limiting portion. The limiting slot hole is snap-fitted with the first protruding limiting portion, and the second protruding limiting portion is limited in the concave slot and abuts against the bottom of the concave slot.

[0021] As an optional solution for the fuse, a seal is provided between the pressure cap and the outer shell, and the seal includes a sealing sleeve and an annular seal provided on the outer wall of the sealing sleeve, the outer wall of the annular seal abuts against the inner wall of the through hole, the insulating part of the cable is passed through the first through hole of the sealing sleeve and the second through hole of the pressure cap, and the sealing sleeve is inserted into the second through hole of the pressure cap.

[0022] Beneficial effects of the utility model:

[0023] The utility model provides a fixing structure of a fuse tube, which facilitates installation of the fuse tube by arranging the fuse tube in a containing groove and elastically clamping the fuse tube between two supporting arms; a wire pressing buckle is arranged at the end of a fuse bracket and can press an end of the supporting arm away from the fuse tube, thereby limiting the supporting arm and preventing the supporting arm from loosening, so as to improve the installation firmness of the fuse tube.

[0024] The utility model provides a fuse, which can be firmly installed by setting the fixing structure of the fuse tube, and the wire core of the cable is clamped between the support arm and the end face of the fuse tube, and the insulating part of the cable is clamped in the clamping space, so that the connection between the cable and the fuse tube is firm. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a partial structural schematic diagram of a fuse provided by an embodiment of the utility model;

[0026] Figure 2 yes Figure 1 A magnified view of the structure at A in FIG.

[0027] Figure 3 It is a structural schematic diagram of a wire pressing buckle involved in an embodiment of the utility model;

[0028] Figure 4 It is a structural exploded diagram of the fuse provided by the embodiment of the utility model;

[0029] Figure 5 It is a cross-sectional view of a partial structure of a fuse provided by an embodiment of the utility model;

[0030] Figure 6 It is a structural schematic diagram of a housing involved in an embodiment of the utility model;

[0031] Figure 7 is a cross-sectional view of the connection between the housing and the fuse holder involved in the embodiment of the utility model;

[0032] Figure 8 yes Figure 7 Cross-section of the middle BB;

[0033] Figure 9 This is a cross-sectional view of the fuse provided by the embodiment of the present utility model.

[0034] In the figure:

[0035] 100. Cable; 101. Core; 102. Insulating part;

[0036] 1. Fuse holder; 11. Receiving groove; 12. Support arm; 121. Short arm; 1211. Convex contact part; 13. Buckle; 131. Extension part; 132. Hook;

[0037] 2. Fuse tube;

[0038] 3. Hoop ring; 31. Welding avoidance hole; 32. Protrusion;

[0039] 4. Pressing buckle; 41. Main body part; 42. Support rib plate; 43. Pressing plate;

[0040] 5. Outer shell; 51. Through hole; 52. First limit stop; 521. Card slot; 53. Second limit stop; 54. First convex limit part; 55. Second convex limit part;

[0041] 6. Compression cap; 61. Limit slot hole; 62. Concave groove; 63. Ring inclined surface;

[0042] 7. Sealing member; 71. Sealing sleeve; 72. Annular seal. Detailed implementation manners

[0043] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar components or components with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0044] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, a mechanical connection, an electrical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0045] In the description of the present utility model, unless otherwise clearly stipulated and limited, a first feature being "above" or "below" a second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0047] like Figures 1-3 As shown, the embodiment of the utility model provides a fixing structure of a fuse tube, which includes a fuse holder 1, a fuse tube 2 and a wire pressing buckle 4. The fuse holder 1 has a receiving groove 11 extending along a first direction (i.e., the X-axis direction in the figure), and two support arms 12 spaced apart along the first direction are arranged in the receiving groove 11. When the fuse tube 2 is arranged in the receiving groove 11, the fuse tube 2 is elastically clamped between the two support arms 12; two wire pressing buckles 4 are arranged, and the two wire pressing buckles 4 are spaced apart along the first direction at the two ends of the fuse holder 1, and the wire pressing buckles 4 press the corresponding support arm 12 against the end of the fuse tube 2.

[0048] The fixing structure of the fuse tube is such that the fuse tube 2 is arranged in the accommodating groove 11 and elastically clamped between the two support arms 12, so that the fuse tube 2 is easy to install, and the wire pressing buckle 4 is arranged at the end of the fuse bracket 1 and can press the end of the support arm 12 away from the fuse tube 2, limit the support arm 12, prevent the support arm 12 from loosening, so as to improve the installation firmness of the fuse tube 2.

[0049] Specifically, the support arm 12 includes two short arms 121, which are spaced apart along the second direction (i.e., the Y-axis direction in the figure) and are respectively connected to the side walls of the accommodating groove 11. A first gap is provided between the short arms 121 and the bottom of the accommodating groove 11. When the fuse tube 2 is arranged in the accommodating groove 11, the two end surfaces of the fuse tube 2 along the first direction are respectively abutted against the corresponding two short arms 121. The short arms 121 can be elastically expanded under the action of the fuse tube 2, so that the short arms 121 form an inward elastic extrusion force to fix the fuse tube 2.

[0050] The first direction and the second direction are perpendicular to each other.

[0051] Furthermore, a convex contact portion 1211 is provided at one end of the short arm 121 facing the fuse tube 2. The convex contact portion 1211 can abut against the end face of the fuse tube 2, so that the short arm 121 can reliably abut against the end face of the fuse tube 2.

[0052] Optionally, the wire pressing buckle 4 includes a main body portion 41 and two supporting rib plates 42 provided at one end of the main body portion 41 facing the supporting arm 12. The two supporting rib plates 42 are spaced apart along the second direction, and the two supporting rib plates 42 can respectively press against the corresponding two short arms 121, with a reasonable structural design.

[0053] Optionally, the fuse holder 1 is an injection molded part, which is integrally processed by an injection molding process.

[0054] The embodiment of the present invention also provides a fuse, which is used to connect two converging cables 100, such as Figure 4 and in combination with Figure 2 as shown, it includes the above-mentioned fixing structure of the fuse tube. The wire cores 101 of the two cables 100 are respectively welded to the two end portions of the fuse tube 2 along the first direction. The portions of the wire cores 101 of each cable 100 other than being welded to the fuse tube 2 are all passed through the corresponding first gap and clamped between the corresponding supporting arm 12 and the end face of the fuse tube 2. That is, when the fuse tube 2 is disposed in the receiving groove 11, the wire core 101 passes through the corresponding first gap, and the two end faces of the fuse tube 2 along the first direction respectively abut against the corresponding two short arms 121. The short arms 121 can be elastically expanded under the action of the fuse tube 2, so that the short arms 121 form an inward elastic pressing force to fix the fuse tube 2 and elastically press the wire core 101 to prevent the wire core 101 from being pulled and affecting the connection between the wire core 101 and the fuse tube 2; semi-circular grooves are provided at both the main body portion 41 of the wire pressing buckle 4 and the end portion of the fuse holder 1. The semi-circular groove of the main body portion 41 and the semi-circular groove of the fuse holder 1 are buckled with each other to form a clamping space, and the insulating portion 102 of the cable 100 is fixedly clamped in the clamping space to make the connection of the cable 100 firm.

[0055] By providing the above-mentioned fixing structure of the fuse tube, the fuse tube 2 is firmly installed, and the wire core 101 of the cable 100 is clamped between the supporting arm 12 and the end face of the fuse tube 2, and the insulating portion 102 of the cable 100 is clamped in the clamping space, so that the connection between the cable 100 and the fuse tube 2 is firm.

[0056] Optionally, the main body portion 41 is welded to the fuse holder 1.

[0057] Further, the fuse further includes two hoop rings 3, the two hoop rings 3 are respectively clamped to both ends of the fuse tube 2 along the first direction, and the core 101 of each cable 100 is clamped between the corresponding hoop ring 3 and the outer wall of the end of the fuse tube 2 to fix the core 101; a welding avoidance hole 31 is provided on the side wall of the hoop ring 3, and the core 101 partially coincides with the welding avoidance hole 31 so that the core 101 exposes the welding position, and the operator welds the core 101 to the outer wall of the fuse tube 2 through the welding avoidance hole 31. The hoop ring 3 not only plays a role in fixing the core 101 during the welding of the core 101, but also plays a role in pressing the core 101 to prevent it from being pulled and damaging the welding point, improving the firmness of the connection.

[0058] Optionally, the hoop ring 3 is provided with a protrusion 32, the welding avoidance hole 31 is provided on the protrusion 32, and there is a second gap between the protrusion 32 and the outer wall of the end of the fuse tube 2. The welded position of the core 101 is arranged in the second gap, and the second gap can accommodate the core 101, and the structural design is more reasonable.

[0059] In order to make the installation of the hoop ring 3 more convenient, the hoop ring 3 can be made of an elastic sheet so that the hoop ring 3 elastically clamps to the outer wall of the end of the fuse tube 2.

[0060] In order to form a bend in the part of the core 101 other than the welding position welded to the fuse tube 2, as Figure 5 shown, a pressing plate 43 is arranged between the two support rib plates 42. When the pressing buckle 4 is assembled to the fuse support 1, the two support rib plates 42 respectively press against the corresponding two short arms 121, and the pressing plate 43 presses against the core 101 to form a bend, reducing the influence of the pulling force on the core 101.

[0061] By setting the pressing buckle 4, it can be ensured that the welding point of the core 101 is not affected by the pulling force. That is, when the cable 100 is pulled, the main body 41 absorbs most of the pulling force, and there is a certain margin for the core 101. When the core 101 is pulled, the pressing plate 43 presses against the core 101 to make the core set in a U shape. The pressing plate 43 causes resistance to the core 101, and the support arm 12 presses the core 101 against the end face of the fuse tube 2 to further form resistance, ensuring that the welding is not affected.

[0062] As Figure 4 and combined with Figures 6-8 shown, the fuse further includes a housing 5 and two compression caps 6. The housing 5 is provided with a through hole 51 extending along the first direction, the fuse support 1 is snap-fitted into the through hole 51, and the two compression caps 6 are respectively buckled and snap-fitted to both ends of the housing 5 along the first direction to close the through hole 51.

[0063] Specifically, two first limiting blocks 52 distributed circumferentially are provided on the inner wall of one end of the through hole 51 along the first direction. The first limiting block 52 is provided with a clamping groove 521. One end face of the fuse holder 1 along the first direction is provided with a buckle 13 corresponding to the first limiting block 52 one by one. The buckle 13 includes an extension part 131 and a hook 132 connected to each other. The extension part 131 is connected to the end face of the fuse holder 1, and the hook 132 is arranged at one end of the extension part 131 far from the fuse holder 1. During installation, the fuse holder 1 penetrates into the through hole 51 from the side where the first limiting block 52 is not provided. After the hook 132 passes through the clamping groove 521, the extension part 131 is limited in the clamping groove 521 to prevent the fuse holder 1 from rotating. The first limiting block 52 is limited between the hook 132 and the end face of the fuse holder 1 to prevent the fuse holder 1 from displacing along the first direction. Of course, three or four first limiting blocks 52 can also be provided.

[0064] In this embodiment, buckles 13 are provided on both end faces of the fuse holder 1 along the first direction, so that the fuse holder 1 can be directly installed without confirming the installation direction during assembly, and the operation is more convenient.

[0065] Optionally, in order to improve the installation stability of the fuse holder 1, a plurality of second limiting blocks 53 distributed circumferentially can also be provided on the inner wall of the end of the through hole 51 where the first limiting block 52 is provided. The end faces between the fuses can abut against the first limiting block 52 and the second limiting block 53 to make the structure more stable.

[0066] Optionally, circumferentially distributed first convex limiting parts 54 and second convex limiting parts 55 are provided on the outer walls of both ends of the housing 5. A limiting slot hole 61 is provided on the side wall of the compression cap 6, and a concave groove 62 is provided on the end face of the side wall of the compression cap 6 facing the housing 5. When the compression cap 6 is buckled on the end of the housing 5, the first convex limiting part 54 is clamped with the limiting slot hole 61, and the second convex limiting part 55 is limited in the concave groove 62 and abuts against the bottom of the concave groove 62. This structure makes the installation of the compression cap 6 convenient and stable.

[0067] In this embodiment, both the first convex limiting part 54 and the second convex limiting part 55 are provided with two, and the first convex limiting part 54 and the second convex limiting part 55 are distributed circumferentially in a cross pattern.

[0068] Optionally, in order to facilitate the first convex limiting part 54 to be inserted into the limiting slot hole 61, an inclined surface is provided on the outer end face of the first convex limiting part 54.

[0069] Optionally, as Figure 4 and in combination with Figure 9As shown, a seal 7 is provided between the compression cap 6 and the outer shell 5. The seal 7 includes a seal sleeve 71 and an annular seal 72 provided on the outer wall of the seal sleeve 71. The outer wall of the annular seal 72 abuts against the inner wall of the through hole 51. The insulating portion 102 of the cable 100 is inserted into the first through hole of the seal sleeve 71 and the second through hole of the compression cap 6, and the seal sleeve 71 is inserted into the second through hole of the compression cap 6. Specifically, the second through hole includes a straight section and a tapered section. When the compression cap 6 is installed, the straight section is inserted into the insulating portion 102 of the cable 100, and the seal sleeve 71 is inserted into the tapered section. The annular inclined surface 63 of the tapered section can press against the outer wall of the seal sleeve 71 to seal between the seal sleeve 71 and the insulating portion 102 of the cable 100. It can be understood that the outer wall of the annular seal 72 is in interference fit with the inner wall of the through hole 51, between the first through hole of the seal sleeve 71 and the insulating portion 102 of the cable 100.

[0070] Furthermore, two annular ridges are provided on the hole wall of the first through hole of the seal sleeve 71 and are spaced apart along the first direction to further improve the sealing effect.

[0071] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the embodiments of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the embodiments here. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. The fixing structure of a fuse tube, characterized in that, include: A fuse holder (1) is provided with a receiving groove (11) extending along a first direction, and two supporting arms (12) are provided in the receiving groove (11) and are spaced apart and distributed along the first direction; A fuse tube (2) is arranged in the containing groove (11), and the fuse tube (2) is placed between the two support arms (12), and the two support arms (12) elastically clamp the fuse tube (2); Two wire pressing buckles (4) are provided, and the two wire pressing buckles (4) are arranged at intervals at the two ends of the fuse holder (1) along the first direction, and the wire pressing buckles (4) press against the end of the corresponding support arm (12) away from the fuse tube (2).

2. The fixing structure of the fuse tube according to claim 1, characterized in that, Each of the support arms (12) comprises two short arms (121), the two short arms (121) are spaced apart along the second direction and are respectively connected to the side walls of the accommodating groove (11), and the two end surfaces of the fuse tube (2) along the first direction are respectively elastically abutted against the corresponding two short arms (121); The first direction and the second direction are perpendicular to each other.

3. The fixing structure of the fuse tube according to claim 2, characterized in that, One end of the short arm (121) facing the fuse tube (2) is provided with a protruding contact portion (1211) abutting against the end surface of the fuse tube (2).

4. The fixing structure of the fuse tube according to claim 2, characterized in that, The wire pressing buckle (4) comprises a main body (41) and two supporting ribs (42) arranged at one end of the main body (41) facing the fuse tube (2); the main body (41) is fixedly connected to the fuse holder (1); and the two supporting ribs (42) are pressed against the two short arms (121) corresponding thereto in a one-to-one correspondence.

5. The fixing structure of the fuse tube according to claim 1, characterized in that, The fuse holder (1) is an injection-molded part.

6. A fuse for connecting two cables (100), characterized in that, The fuse comprises a fixing structure for a fuse tube according to any one of claims 1 to 5, the wire cores (101) of the two cables (100) are respectively connected to the two ends of the fuse tube (2) along the first direction, and each of the wire cores (101) is clamped between the corresponding support arm (12) and the end face of the fuse tube (2), a clamping space is formed between the wire buckle (4) and the fuse tube (2), and the cable (100) is fixedly clamped in the clamping space.

7. The fuse according to claim 6, characterized in that, The fuse further comprises a shell (5) and two pressing caps (6); the shell (5) is provided with a through hole (51) extending along the first direction; the fuse holder (1) is snap-fitted into the through hole (51); the two pressing caps (6) are respectively buckled at two ends of the shell (5) along the first direction, and the pressing caps (6) are snap-fitted to the shell (5); the pressing caps (6) are provided with a second through hole for penetrating the insulating portion (102) of the cable (100).

8. The fuse according to claim 7, wherein, The inner wall of one end of the through hole (51) is provided with at least two first limit blocks (52) distributed around a circumference, and the first limit blocks (52) are provided with a clamping groove (521); At least one end face of the fuse holder (1) along the first direction is provided with a buckle (13) corresponding to the first limiting block (52) one by one. The buckle (13) includes an extension part (131) and a hook (132) connected to each other. The extension part (131) is connected to the end face of the fuse holder (1), and the hook (132) is arranged at one end of the extension part (131) away from the fuse holder (1). The extension part (131) is limited in the card slot (521), and the first limiting block (52) is limited between the hook (132) and the end face of the fuse holder (1).

9. The fuse according to claim 7, characterized in that, The outer walls of both ends of the housing (5) are provided with a circumferentially distributed first convex limiting part (54) and a second convex limiting part (55); The side wall of the pressure cap (6) is provided with a limiting slot hole (61) corresponding to the first convex limiting part (54). The side wall end face of the pressure cap (6) facing the housing (5) is provided with a concave slot (62) corresponding to the second convex limiting part (55). The limiting slot hole (61) is clamped with the first convex limiting part (54), and the second convex limiting part (55) is limited in the concave slot (62) and abuts against the bottom of the concave slot (62).

10. The fuse according to claim 7, wherein, A sealing member (7) is arranged between the pressure cap (6) and the housing (5). The sealing member (7) includes a sealing sleeve (71) and an annular seal (72) arranged on the outer wall of the sealing sleeve (71). The outer wall of the annular seal (72) abuts against the inner wall of the through hole (51). The insulating part (102) of the cable (100) passes through the first through hole of the sealing sleeve (71) and the second through hole of the pressure cap (6), and the sealing sleeve (71) is inserted into the second through hole of the pressure cap (6).

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