A small volume hand repair switch with easy heat dissipation

Abstract

The utility model discloses a small volume manual maintenance switch of easy heat dissipation. The plug part of the manual maintenance switch includes the plug shell of lower open mouth, the inner installation shell of upper open mouth, the fuse and the elastic heat conduction spare, the inner installation shell is connected in the inner chamber of plug shell by screw thread, the fuse includes the fuse body of installation in the inner installation shell, two plug copper bars, and the inner link sheet of two plug copper bars is connected the two opposite sides of fuse body symmetry, forms the fuse of M type structure, and the lower opening of inner installation shell is extended to the lower end of side insertion piece of two plug copper bars, and the both ends of elastic heat conduction spare are pasted fuse body, plug shell, when the plug part and the socket part are matched, and the two slot assemblies of socket part are inserted into plug shell and are vertically inserted by two side insertion pieces of upper end. The utility model has the effects of small volume and high heat dissipation capacity, and is suitable for high pressure and high current environment application.

Description

Technical Field

[0001] This utility model relates to the field of electrical connections, and in particular to a small-sized manual maintenance switch that is easy to dissipate heat. Background Technology

[0002] Manual maintenance switches, as key components of high-voltage systems, are used to disconnect the high-voltage system during emergencies or maintenance, and are especially crucial for the safe operation of new energy electric vehicles. The existing manual maintenance switch structure consists of a fuse insert copper busbar extending from the housing and inserting into a slot assembly at the lower end. Its drawbacks are: firstly, the existing structure is bulky due to the large size of the fuse, affecting the arrangement of other components and making the manual maintenance switch unsuitable for height-restricted applications; secondly, the large size of the fuse itself, being the largest heat source, necessitates a sealed design for the manual maintenance switch, resulting in poor heat dissipation and excessively high temperatures, leading to a decrease in current-carrying capacity and an overall large size; thirdly, the existing insert-slot structure has poor sealing performance at the connection points, failing to meet single-end sealing protection requirements; and fourthly, the large size and weight of the fuse result in poor vibration resistance, making it unsuitable for applications requiring high vibration. Utility Model Content

[0003] To address one or more of the aforementioned problems, this utility model provides a small-sized manual maintenance switch that is easy to dissipate heat.

[0004] According to one aspect of the present invention, a small-volume manual maintenance switch with easy heat dissipation includes: a plug part and a socket part that are interlocked with each other. The plug part includes a plug shell with a lower opening, an inner mounting shell with an upper opening, a fuse, and an elastic heat-conducting element.

[0005] The inner mounting housing is located inside the plug housing and the two are connected by a threaded connection;

[0006] The fuse includes a fuse body installed in an inner mounting housing and two plug copper busbars. The plug copper busbars include vertically parallel inner connecting pieces and side inserts. The inner connecting pieces of the two plug copper busbars are symmetrically connected to two opposite sides of the fuse body to form an M-shaped fuse. The lower ends of the side inserts of the two plug copper busbars extend outward from the lower openings at both ends of the lateral direction of the inner mounting housing.

[0007] The lower end of the elastic heat-conducting component is attached to the upper surface of the fuse body, and the upper end is attached to the upper wall of the inner cavity of the plug housing;

[0008] When the plug and socket are inserted together, the two slot assemblies of the socket extend into the plug housing and are vertically inserted by the two side prongs at the top.

[0009] In some embodiments, the plug copper busbar includes an upper flat plate and an inner connecting plate and a side insert plate that are integrally vertically connected to both ends of the upper flat plate, forming a ∩-shaped structure.

[0010] In some implementations, the side insert is shorter than the inner insert, and after the fuse is assembled, the side insert is higher than the lower surface of the fuse body.

[0011] In some implementations, the copper busbar of the plug is formed by a double right-angle bend, and the lower ends of the side inserts are machined with beveled surfaces to form trapezoidal pointed entry ends.

[0012] In some embodiments, the upper flat piece is higher than the upper surface of the fuse body and fits against the upper wall of the inner cavity of the plug housing. The two inner connecting pieces, the fuse body, and the plug housing surround and form a rectangular receiving cavity. The elastic heat-conducting element is vertically interference-fitted into the receiving cavity.

[0013] In some implementations, the elastic thermally conductive element is thermally conductive silicone.

[0014] In some embodiments, the width of the inline tab is the same as the width of the fuse body, the lower end face of the inline tab is flush with the lower surface of the fuse body, and the inline tab and the side surface of the fuse body are fixedly connected by several transverse threaded parts.

[0015] In some embodiments, the socket part also includes a socket housing, with multiple metal threaded bushings integrally injection molded to the four edges of the socket housing. A first bolt passes through the through holes at the four edges of the plug housing and the central through hole of the mounting base, threadedly connecting to the corresponding metal threaded bushings, thereby locking the socket housing and the plug housing to the mounting base.

[0016] In some embodiments, the upper surface of the socket housing is interference-sealed to the lower surface of the mounting base via a lower sealing gasket, and the lower surface of the plug housing is interference-sealed to the upper surface of the mounting base via an upper sealing gasket.

[0017] The vertical section of the slot assembly and the vertical tube hole of the socket housing are connected by an interference seal through a slot sealing ring, and the four edges of the vertical section are provided with contact radii.

[0018] In some embodiments, a high-voltage interlocking pin is installed in the middle of the lower surface of the inner mounting housing, and the high-voltage interlocking socket is connected to the middle tube hole of the socket housing through an O-ring interference fit, and the high-voltage interlocking pin is inserted vertically into the socket housing to connect with the high-voltage interlocking socket.

[0019] This compact manual maintenance switch with easy heat dissipation features an M-type fuse and a novel heat dissipation structure. Its advantages are: First, the M-type fuse raises the height of the side insert, allowing the connection points of the slot assembly and the plug copper busbar to be inserted into the plug housing. This significantly reduces the overall installation height, facilitating the arrangement of other components and greatly reducing the size of the manual maintenance switch within the same specifications, meeting the application scenarios of small size and low height. Second, the inclusion of a flexible heat-conducting element effectively transfers heat from the fuse. Compared to air transmission, solid contact heat conduction is greatly increased, especially with thermally conductive silicone, whose thermal conductivity reaches over 90%, dozens of times that of air, enabling rapid heat dissipation and improving internal temperature and current carrying capacity. This achieves efficient reduction of temperature rise and increased current carrying capacity. Third, the use of a flexible heat-conducting element facilitates installation and fixation while protecting the fuse. Fourth, the headstock locking bolt structure and metal threaded bushing ensure controllable torque attenuation during vibration, thus meeting USCAR2 v2 or LV214 standards. The SG3 vibration level requirement ensures good vibration resistance; fifthly, the rounded corners and sealing rings improve the sealing level at each connection, effectively meeting the sealing requirements of a single seat. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of a small-volume manual maintenance switch that is easy to dissipate heat, according to one embodiment of the present invention.

[0021] Figure 2 for Figure 1 The diagram shows a cross-sectional view of a small, easily heat-dissipating manual maintenance switch.

[0022] Figure 3 for Figure 1 The figure shown is a three-dimensional exploded view of a small, easily heat-dissipating manual maintenance switch.

[0023] Figure 4 for Figure 3 A three-dimensional schematic diagram of the fuse shown;

[0024] Figure 5 for Figure 3 A three-dimensional schematic diagram of the slot assembly shown;

[0025] Plug part 01, plug housing 1, inner mounting housing 2, lower opening 21, fuse 3, fuse body 30, plug copper busbar 31, upper flat piece 310, inner connecting piece 311, side insert piece 312, inlet end 313, receiving cavity 32, elastic heat-conducting element 4, high voltage interlocking pin 7, upper sealing gasket 11, warning label 12;

[0026] Socket section 02, slot assembly 5, adapter copper busbar 51, contact fillet 52, socket housing 6, metal threaded bushing 60, lower sealing washer 61, slot sealing ring 62, O-ring 63, high-voltage interlocking socket 8, cover plate 9.

[0027] Mounting base plate 03; First bolt 04. Detailed Implementation

[0028] The present invention will now be described in further detail with reference to the accompanying drawings. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to the directions in the accompanying drawings, while the terms "inner" and "outer" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0029] Figures 1 to 5 The figure schematically illustrates a small, heat-dissipating manual maintenance switch according to one embodiment of the present invention. As shown, the small, heat-dissipating manual maintenance switch includes: a plug portion 01 and a socket portion 02 that are interlocked. The plug portion 01 includes a lower open plug housing 1, an upper open inner mounting housing 2, a fuse 3, and an elastic heat-conducting element 4.

[0030] The inner mounting housing 2 is located inside the plug housing 1 and the two are connected by a threaded connection.

[0031] The fuse 3 includes a fuse body 30 installed inside the inner mounting housing 2 and two plug copper busbars 31. The plug copper busbars 31 include vertically parallel inner connecting pieces 311 and side inserts 312. Preferably, the plug copper busbars 31 include an upper flat piece 310 and an inner connecting piece 311 and a side insert 312 integrally vertically connected to the two ends of the upper flat piece 310, forming a ∩-shaped structure. The inner connecting pieces 311 of the two plug copper busbars 31 are symmetrically connected to two opposite sides of the fuse body 10, forming an M-shaped fuse 3. The lower ends of the side inserts 312 of the two plug copper busbars 31 extend outward from the lower openings 21 at both lateral ends of the inner mounting housing 2.

[0032] The lower end of the elastic heat-conducting element 4 is attached to the upper surface of the fuse body 30 and the upper end is attached to the inner wall of the plug housing 1; the elastic heat-conducting element 4 is preferably thermally conductive silicone.

[0033] When the plug part 01 and the socket part 02 are inserted together, the two slot assemblies 5 of the socket part 02 extend into the plug housing 1 and are vertically inserted by the two upper side inserts 312.

[0034] This small-volume manual maintenance switch with easy heat dissipation features an M-type fuse 3 and a novel heat dissipation structure. Its advantages are: First, the M-type structure of the fuse 3 raises the height of the side insert 312, allowing the connection between the slot assembly 5 and the plug copper busbar 31 to enter the plug housing 1. This significantly reduces the overall installation height, facilitating the arrangement of other components and greatly reducing the size of the manual maintenance switch within the same specifications, thus meeting the application scenarios of small size and low height. Second, the flexible heat-conducting element 4 effectively transfers heat from the fuse 3. Compared to air transmission, solid contact heat conduction is greatly increased, especially with thermally conductive silicone, whose thermal conductivity exceeds 2, dozens of times that of air. This allows for rapid heat conduction, high heat dissipation performance, effectively improving internal temperature and current carrying capacity, thus achieving efficient reduction of temperature rise and increased current carrying capacity. Third, the flexible heat-conducting element 4 facilitates installation and fixation while protecting the fuse 3.

[0035] Furthermore, the side insert 312 is shorter than the inner insert 311. After the fuse 3 is assembled, the side insert 312 is higher than the lower surface of the fuse body 30. The beneficial effect is that this arrangement further reduces the overall height of the device, resulting in a smaller size.

[0036] Preferably, the plug copper busbar 31 is formed by a double right-angle bend, and the lower ends of the side insert 312 are machined with beveled surfaces on both sides to form trapezoidal pointed entry ends 313. The advantages are that this design of the plug copper busbar 31 facilitates processing and installation.

[0037] Furthermore, the upper flat piece 310 is higher than the upper surface of the fuse body 30 and fits against the upper wall of the inner cavity of the plug housing 1. That is, the upper end of the inner connecting piece 311 is higher than the upper surface of the fuse body 30. The two inner connecting pieces 311, the fuse body 30, and the plug housing 1 surround and form a rectangular receiving cavity 32. The elastic heat-conducting element 4 is vertically interference-fitted into the receiving cavity 32. Its beneficial effect is that this arrangement further ensures the stable installation of the elastic heat-conducting element 4 and ensures stable and good heat dissipation.

[0038] Furthermore, the width of the inner connector 311 is the same as the width of the fuse body 30, and the lower end face of the inner connector 311 is flush with the lower surface of the fuse body 30. The inner connector 311 and the side surface of the fuse body 30 are fixedly connected by several transverse threaded parts. The beneficial effect is that this arrangement can effectively protect the fuse body 30.

[0039] Furthermore, the socket part 02 also includes a socket housing 6. Multiple metal threaded bushings 60 are integrally injection molded to the four edges of the socket housing 6. A first bolt 04 passes through the through holes at the four edges of the plug housing 1 and the central through hole of the mounting base 03, threadedly connecting to the corresponding metal threaded bushings 60, thereby locking the socket housing 6 and the plug housing 1 to the mounting base 03. The beneficial effect is that this head-and-seat locking bolt structure, with its metal threaded bushings 60, ensures controllable torque attenuation during vibration, thus meeting the USCAR2 v2 or LV214SG3 vibration level requirements and achieving good vibration resistance performance.

[0040] Furthermore, a lower sealing gasket 61 is interference-fitted onto the upper surface of the socket housing 6, and an upper sealing gasket 11 is interference-fitted onto the lower surface of the plug housing 1. The two sealing gaskets are interference-fitted and elastically compressed to seal against the upper and lower sides of the mounting base plate 03. Preferably, the slot assembly 5 is installed in the vertical tube hole of the socket housing 6 of the socket part 02, and a slot sealing ring 62 is interference-fitted into the vertical tube hole. This arrangement achieves effective sealing between the housing and the mounting plate. Preferably, the lower end of the slot assembly 5 is provided with a right-angle bent transition copper busbar 51. The vertical section of the transition copper busbar 51 is interference-fitted with the slot sealing ring 62, and the four edges of the vertical section are provided with contact radii 52. This arrangement achieves effective sealing of the slot assembly position. Preferably, a high-voltage interlocking pin 7 is also installed on the rectangular convex ring in the middle of the lower surface of the inner mounting shell 2. An O-ring 63 is interference-fitted into the middle tube hole of the socket shell 6, and the high-voltage interlocking socket 8 is interference-fitted into the O-ring 63. The high-voltage interlocking pin 7 vertically enters the socket shell 6 and is inserted into the high-voltage interlocking socket 8. This arrangement achieves effective sealing at the interlocking position. Its beneficial effect is that the above arrangement improves the sealing level of each connection and effectively meets the sealing requirements of a single socket.

[0041] Furthermore, a warning label 12 is installed on the outer end face of the plug housing 1; a cover plate 9 is installed on the lower end of the socket housing 6.

[0042] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A small-sized manual maintenance switch with easy heat dissipation, comprising: The plug portion (01) and socket portion (02) are interlocked, characterized in that the plug portion (01) includes a lower open plug housing (1), an upper open inner mounting housing (2), a fuse (3), and an elastic heat-conducting element (4). The inner mounting housing (2) is located inside the plug housing (1) and the two are connected by a threaded connection; The fuse (3) includes a fuse body (30) installed in the inner mounting shell (2) and two plug copper busbars (31). The plug copper busbars (31) include vertically parallel inner connecting pieces (311) and side inserts (312). The inner connecting pieces (311) of the two plug copper busbars (31) are symmetrically connected to the two opposite sides of the fuse body (10) to form an M-shaped fuse (3). The lower ends of the side inserts (312) of the two plug copper busbars (31) extend outward from the lower openings (21) at both ends of the transverse direction of the inner mounting shell (2). The lower end of the elastic heat-conducting element (4) is attached to the upper surface of the fuse body (30) and the upper end is attached to the upper wall of the inner cavity of the plug shell (1); When the plug part (01) and the socket part (02) are inserted together, the two slot assemblies (5) of the socket part (02) extend into the plug housing (1) and are vertically inserted by the two upper side inserts (312).

2. The small-volume manual maintenance switch according to claim 1, characterized in that, The plug copper busbar (31) includes an upper flat plate (310) and an inner connecting plate (311) and a side insert plate (312) that are vertically connected to both ends of the upper flat plate (310) to form a ∩-shaped structure.

3. The small-volume manual maintenance switch according to claim 2, characterized in that, The length of the side insert (312) is shorter than the length of the inner insert (311). After the fuse (3) is assembled, the side insert (312) is higher than the lower surface of the fuse body (30).

4. The small-volume manual maintenance switch according to claim 3, characterized in that, The plug copper busbar (31) is formed by a double right-angle bend, and the lower ends of the side insert (312) are machined with beveled surfaces to form trapezoidal pointed inlet ends (313).

5. The small-volume manual maintenance switch according to claim 2, characterized in that, The upper flat piece (310) is higher than the upper surface of the fuse body (30) and fits the upper wall of the inner cavity of the plug housing (1). The two inner connecting pieces (311), the fuse body (30) and the plug housing (1) surround and form a rectangular receiving cavity (32). The elastic heat-conducting element (4) is vertically interference-fitted into the receiving cavity (32).

6. The small-volume manual maintenance switch according to claim 5, characterized in that, The elastic thermal conductive element (4) is thermally conductive silicone.

7. The small-volume manual maintenance switch according to any one of claims 1 to 6, characterized in that, The width of the inner connecting piece (311) is the same as the width of the fuse body (30). The lower end face of the inner connecting piece (311) is flush with the lower surface of the fuse body (30). The inner connecting piece (311) and the side surface of the fuse body (30) are fixedly connected by several transverse threaded parts.

8. The small-volume manual maintenance switch according to claim 7, characterized in that, The socket part (02) also includes a socket housing (6), which has multiple metal threaded bushings (60) integrally injection molded to the four edges of the socket housing (6). The first bolt (04) passes through the through holes at the four edges of the plug housing (1) and the middle through hole of the mounting base (03) and is threaded to the corresponding metal threaded bushings (60), thereby locking the socket housing (6) and the plug housing (1) onto the mounting base (03).

9. The small-volume manual maintenance switch according to claim 8, characterized in that, The upper surface of the socket housing (6) is press-fitted to the lower surface of the mounting base plate (03) by the lower sealing gasket (61), and the lower surface of the plug housing (1) is press-fitted to the upper surface of the mounting base plate (03) by the upper sealing gasket (11). Alternatively, the vertical section of the slot assembly (5) and the vertical tube hole of the socket housing (6) are connected by an interference seal through a slot sealing ring (62), and the four edges of the vertical section are provided with contact radii (52).

10. The small-volume manual maintenance switch according to claim 9, characterized in that, A high-voltage interlocking pin (7) is installed in the middle of the lower surface of the inner mounting shell (2). The high-voltage interlocking socket (8) is connected to the middle tube hole of the socket shell (6) through an O-ring (63). The high-voltage interlocking pin (7) enters the socket shell (6) vertically and is inserted into the high-voltage interlocking socket (8).

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