Locking screw and power supply equipment

Abstract

The utility model relates to the technical field of power supply modules, in particular to a locking screw and power supply equipment, the locking screw is used for fixing a radiator and a power supply module, the radiator is provided with a mounting hole, the power supply module is provided with a threaded hole, and the locking screw comprises a nut and a rod body; the rod body comprises a first part, a third part and a second part located between the first part and the third part, the end, away from the second part, of the first part is connected with the pressing face of the nut, external threads are arranged on the outer side of the third part, and the third part is configured to be screwed into the threaded hole through the mounting hole; the length of the second part is smaller than the depth of the mounting hole along the extending direction of the radiator to the power supply module, and the diameter of the first part is larger than those of the second part and the third part; when the third part is screwed into the threaded hole, at least part of the first part is arranged in the mounting hole. In this way, floating of the radiator can be reduced, the risk that the radiator is damaged in the plugging process of the power module is reduced, and the service life of power equipment is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of power modules, and in particular to a locking screw and a power supply device. Background Art

[0002] At present, with the strong support of the country, the energy storage industry is developing rapidly, and the technologies related to power supply equipment are rapidly iterating and updating, moving towards the direction of miniaturization, high energy density, low failure rate and long life.

[0003] At present, the power module is usually installed in a 1U frame during on-site installation, which leads to a height restriction for the whole power supply equipment. The whole height is usually fixed in the industry, usually 40.6±0.5mm. Due to the height restriction, the cooling fans used are generally standard fans, such as 40*40 standard fans.

[0004] In general, if Figure 1 As shown in the figure, the fan and the whole machine are fixed with M3 screws, while the installation hole size of the standard 40 fan is φ3.5, which causes the fan to float too much and extend beyond the edge of the whole machine after being fixed. When the fan extends beyond the edge of the whole machine, it will cause two problems:

[0005] 1. The power module is difficult to plug and unplug.

[0006] 2. When the power module is plugged in or out, the fan is easily damaged by force, thus affecting the life of the entire machine.

[0007] In order to solve the above problems, it is necessary to provide a new locking screw and power supply device. Utility Model Content

[0008] The embodiments of the present application aim to provide a locking screw and a power supply device to reduce the floating of the heat sink and extend the life of the power supply device.

[0009] In order to solve the above technical problems, a technical solution adopted in the present application is: providing a locking screw for fixing the heat sink and the power module, the heat sink is provided with a mounting hole, the power module is provided with a threaded hole, the locking screw comprises a nut and a rod body, the rod body comprises a first part, a third part and a second part located between the first part and the third part, and the end of the first part away from the second part is connected to the pressing surface of the nut, the outer side of the third part is provided with an external thread, and the third part is configured to be screwed into the threaded hole through the mounting hole; along the direction in which the heat sink extends toward the power module, the length of the second part is less than the depth of the mounting hole, and the diameter of the first part is greater than the diameters of the second part and the third part; wherein, when the third part is screwed into the threaded hole, at least part of the first part is arranged in the mounting hole.

[0010] In one or more / any one of the above optional embodiments, a step portion is provided at the connection between the first part and the second part, and a diameter of the step portion gradually decreases along a direction in which the first part extends toward the second part.

[0011] In one or more / any one of the above optional embodiments, the diameter of the step portion away from the second portion is the same as the diameter of the first portion, and the diameter of the step portion away from the first portion is the same as the diameter of the second portion.

[0012] In one or more / any one of the above optional embodiments, the diameter of the external thread of the third portion is 3 mm; and the diameter of the first portion is 3.25 mm-3.35 mm.

[0013] In one or more / any one of the above optional embodiments, the threaded hole is adapted to the external thread of the third part, and the aperture of the threaded hole is smaller than the diameter of the first part; and / or the diameter of the third part is the same as the diameter of the second part; and / or the outer side of the third part is coated with anti-fall glue.

[0014] An embodiment of the present application also provides a power supply device, which is plugged into a frame. The power supply device includes the above-mentioned locking screws, a heat sink and a power supply module. The power supply module includes a shell and a power supply body. The shell is provided with a threaded hole. The shell includes a first surface and a second surface arranged opposite to each other. The shell has an installation space, and the power supply body is accommodated in the installation space; the heat sink is installed on the first surface, and the second surface is configured to be plugged into the frame.

[0015] In one or more / any one of the above optional embodiments, the shell includes a first shell, a second shell, a first side panel and a second side panel, the first shell and the second shell are interlocked to form the installation space; the installation space has a first opening and a second opening arranged opposite to each other, the first side panel is installed on the first opening, and the second side panel is installed on the second opening; wherein the first surface is formed on the first side panel, and the second surface is formed on the second side panel.

[0016] In one or more / any one of the above optional embodiments, a first connecting portion is provided on the first shell, the first connecting portion extends from the first shell to the second shell, a second connecting portion is provided on the second shell, the second connecting portion extends from the second shell to the first shell, one end of the first side panel is fixed to the first connecting portion, and the second end of the first side panel is fixed to the second connecting portion.

[0017] In one or more / any one of the above optional embodiments, the first connecting portion is integrally formed with the first shell; and / or the second connecting portion is integrally formed with the second shell; and / or a vent is provided on the first side panel, and the radiator is installed at the vent.

[0018] In one or more / any one of the above optional embodiments, a connector is included, which is arranged on the second shell and extends from the second side panel. The connector is used to be plugged into the frame, and a rubber cap is provided on one end of the connector that extends out.

[0019] In the embodiment of the present application, the locking screw and the power supply device divide the rod body into a first part, a second part and a third part, and design the diameter of the first part to be larger than the diameters of the second part and the third part, so that when the locking screw locks the power module, at least part of the first part is arranged in the mounting hole of the radiator, thereby reducing the floating of the radiator. At the same time, it can also reduce the risk of damaging the radiator during the plugging and unplugging of the power module and the frame, thereby extending the life of the power supply device.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0022] Figure 1 It is an assembly diagram of a power supply device in the prior art;

[0023] Figure 2 is a schematic diagram of the structure of a power supply device according to an embodiment of the present application;

[0024] Figure 3 yes Figure 1 A schematic diagram of the structure of the locking screw in the power supply device shown;

[0025] Figure 4 yes Figure 1 A cross-sectional view of the power supply device shown;

[0026] Figure 5 is an exploded schematic diagram of the power supply device shown;

[0027] Figure 6 yes Figure 5A schematic structural diagram of a first housing in a power supply device shown;

[0028] Figure 7 yes Figure 5 A schematic structural diagram of a second housing in the power supply device shown;

[0029] Figure 8 yes Figure 5 A schematic structural diagram of a first side panel in the power supply device shown;

[0030] Fig. 9 yes Figure 8 a side view of the second side panel shown;

[0031] Fig.10 yes Figure 5 A schematic structural diagram of a second side panel in the power supply device shown;

[0032] Fig.11 yes Figure 5 An exploded view of the connectors in a power supply unit is shown.

[0033] The reference numerals in the specific implementation manner are as follows:

[0034] x, first direction; y, second direction; z, third direction;

[0035] 10. Locking screw;

[0036] 110. Nut;

[0037] 120, rod body; 121, first part; 122, second part; 123, third part;

[0038] 20. Power module;

[0039] 210, housing; 213a, first surface; 214a, second surface; 200, installation space;

[0040] 211, first housing; 2111, first connecting portion; 2112, first mounting hole; 2113, eighth mounting hole;

[0041] 212, second housing; 2121, second connecting portion; 2122, second mounting hole; 2123, sixth mounting hole;

[0042] 213, first side plate; 2131, threaded hole; 2132, third mounting hole; 2133, fourth mounting hole; 2134, vent; 2135, extension column;

[0043] 214, second side plate; 2141, third connecting portion; 2142, fifth mounting hole; 2143, mounting portion; 2144, seventh mounting hole;

[0044] 220, power supply body;

[0045] 30. radiator; 310. mounting hole;

[0046] 40a, a first fastener; 40b, a second fastener; 40c, a third fastener; 40d, a fourth fastener;

[0047] 50a, a first isolating member; 50b, a second isolating member;

[0048] 60. Connectors;

[0049] 610, main body; 620, plug-in portion; 630, bending portion; 640, rubber cap;

[0050] 70. Handle;

[0051] 80. Protective cover. DETAILED DESCRIPTION

[0052] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application. It should be noted that when an element is described as "fixed to" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not used to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0054] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "length" and "thickness" is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0055] In the description of the embodiments of the present application, the use of words such as "first" and "second" to define components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meanings and therefore cannot be understood as limiting the scope of protection of the present application. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0056] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0057] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0058] like Figure 2 As shown, an embodiment of the present application provides a power supply device, including a locking screw 10, a power module 20 and a heat sink 30, wherein the locking screw 10 is used to lock the power module 20 and the heat sink 30 together.

[0059] In some embodiments, Figure 3 As shown, the locking screw 10 includes an integrally constructed nut 110 and a rod 120 , wherein the rod 120 is coaxially arranged with the nut 110 , and the rod 120 is used to lock the power module 20 and the heat sink 30 together.

[0060] Among them, one side of the power module 20 is in contact with the heat sink 30, and a threaded hole 2131 is provided on the power module 20. In the prior art, there are defects in the installation of the power module with threaded holes and the heat sink, so the present application makes improvements thereon.

[0061] In some embodiments, Figure 3As shown, the rod body 120 includes a first portion 121, a second portion 122 and a third portion 123. The second portion 122 is located between the first portion 121 and the third portion 123, and one end of the first portion 121 away from the second portion 122 is connected to the pressing surface of the nut 110. The outer side surfaces of the first portion 121 and the second portion 122 are both smooth surfaces. The outer side surface of the third portion 123 is provided with uniformly distributed external threads. The third portion 123 is configured to extend into the threaded hole 2131 of the power module 20 through the mounting hole 310 of the heat sink 30. Along the direction in which the heat sink 30 extends toward the power module 20, the length of the second portion 122 is less than the thickness of the mounting hole 310, and the diameter of the first portion 121 is greater than the diameters of the second portion 122 and the third portion 123. When the third portion 123 is screwed into the threaded hole 2131, at least a portion of the first portion 121 is disposed in the mounting hole 310 of the heat sink 30.

[0062] It will be appreciated that the depth of the mounting holes is the same as the thickness of the heat sink.

[0063] In some embodiments, a step portion 124 is provided at the connection between the first portion 121 and the second portion 122, and the diameter of the step portion 124 gradually decreases along the direction in which the first portion 121 extends toward the second portion 122. Preferably, the diameter of the step portion 124 at one end away from the second portion 122 is the same as the diameter of the first portion 121, and the diameter of the step portion 124 at one end away from the first portion 121 is the same as the diameter of the second portion 122.

[0064] In some embodiments, the diameter of the third part 123 is the same as the diameter of the second part 122, for example, the external thread diameter of the third part is 3mm (M3), the diameter of the second part is 3mm (Φ3), and the diameter of the first part is 3.25mm-3.35mm (Φ3±0.05).

[0065] It is understandable that the diameter of the second part may be larger than the diameter of the third part, for example, the diameter of the second part is larger than the diameter of the third part, and the diameter of the second part is smaller than the diameter of the first part. However, in order to facilitate the installation of the screw, the diameter of the second part is generally designed to be smaller than the diameter of the first part to avoid the first part from getting stuck when it is inserted into the installation hole of the radiator.

[0066] In some embodiments, the outer side of the third portion 123 is coated with anti-fall glue to reduce the loosening of the screw.

[0067] It is understandable that the length of the rod body and the length of the step portion can be customized according to actual needs, and it is only necessary to ensure that when the locking screw locks the power module and the heat sink, at least part of the first part is arranged in the mounting hole of the heat sink.

[0068] In a specific embodiment, the length of the rod body 120 is 26 mm, the sum of the lengths of the third part 123 and the second part 122 is 15 mm, the length of the step portion 124 is 5.71 mm-5.73 mm, and the length of the third part 123 is greater than or equal to 5 mm; the external thread diameter of the third part 123 is 3 mm (M3), the diameter of the second part is 3 mm (Φ3), the diameter of the first part is 3.25 mm-3.35 mm (Φ3±0.05), and the angle between the generatrix of the step portion 124 and the length direction of the rod body 120 is 171.5°.

[0069] In some embodiments, the threaded hole 2131 of the power module 20 has a diameter smaller than the diameter of the first part 121, and the threaded hole 2131 is adapted to the external thread of the third part 123, thereby reducing the floating of the heat sink 30 and the risk of the heat sink 30 exceeding the thickness of the power module 20, which is also beneficial to the plugging and unplugging of the power module 20 and prolonging the life of the power supply device.

[0070] In some embodiments, Figure 4 As shown, the power module 20 is roughly in the shape of a rectangular parallelepiped, and the power module 20 includes a housing 210 and a power main body 220. The housing 210 includes an installation space 200, and the power main body 220 is arranged in the installation space 200. Further, the housing 210 has a first surface 213a and a second surface 214a that are arranged opposite to each other. The heat sink 30 is installed on the first surface 213a, and the second surface 214a is provided with a plug-in component 60 (such as Figure 2 As shown), the connector 60 is used for connecting with the frame.

[0071] In some embodiments, the housing 210 includes a first housing 211, a second housing 212, a first side plate 213, and a second side plate 214. The first housing 211 and the second housing 212 are enclosed together to form the above-mentioned installation space. The installation space 200 has a first opening 201 and a second opening 202 that are arranged opposite to each other. The first side plate 213 is installed in the first opening 201, and the second side plate 214 is installed in the second opening 202. The above-mentioned first surface 213a is provided on the first side plate 213, and the second surface 214a is provided on the second side plate 214.

[0072] For ease of description, the direction in which the first shell 211 extends toward the second shell 212 is defined as the first direction x, the direction in which the first side plate 213 extends toward the second side plate 214 is defined as the second direction y, and the direction perpendicular to the first direction x and the second direction y is defined as the third direction z.

[0073] In some embodiments, Figure 5As shown, the first shell 211 and the second shell 212 are both U-shaped structures, and the first shell 211 and the second shell 212 are interlocked and fixed by screws. The first side plate 213 is generally flat. To facilitate the fixation of the first side plate 213 with the first shell 211 and the second shell 212, as shown in FIG. Figure 6 and Figure 7 As shown, a first connection portion 2111 is provided at one end of the first shell 211 close to the first side plate 213, a second connection portion 2121 is provided at one end of the second shell 212 close to the first side plate 213, one end of the first side plate 213 is fixed to the first connection portion 2111, and the second end of the first side plate 213 is fixed to the second connection portion 2121.

[0074] Further, the first connection portion 2111 extends from the first shell 211 toward the direction close to the second shell 212, and the second connection portion 2121 extends from the second shell 212 toward the direction close to the first shell 211. Preferably, the number of the first connection portions 2111 and the number of the second connection portions 2121 are both multiple, and the multiple first connection portions 2111 are arranged at intervals on the first shell 211, and the multiple second connection portions 2121 are arranged at intervals on the second shell 212.

[0075] It can be understood that, along the direction in which the first shell extends toward the second shell, the length of the first connecting portion is smaller than the height of the first side plate, and the length of the second connecting portion is smaller than the height of the first side plate.

[0076] In some embodiments, the first connection portion 2111 is integrally formed with the first shell 211 , and the second connection portion 2121 is integrally formed with the second shell 212 .

[0077] In some embodiments, please combine Figure 8 A first mounting hole 2112 is provided on the first connecting portion 2111, a second mounting hole 2122 is provided on the second connecting portion 2121, a third mounting hole 2132 is provided at a position of the first side plate 213 corresponding to the first mounting hole 2112, a fourth mounting hole 2133 is provided at a position of the first side plate 213 corresponding to the second mounting hole 2122, the first fastener 40a passes through the third mounting hole 2132 and the first mounting hole 2112 in sequence to fix the first end of the first side plate 213 to the first shell 211, and the second fastener 40b passes through the fourth mounting hole 2133 and the second mounting hole 2122 in sequence to fix the second end of the first side plate 213 to the second shell 212.

[0078] In some embodiments, Figure 8 As shown, the first side plate 213 is provided with a vent 2134, which is in communication with the installation space 200. The radiator 30 is installed on the first side plate 213, and at least a portion of the radiator 30 covers the vent 2133.

[0079] In some embodiments, the threaded hole 2131 is disposed on the first side plate 213 to facilitate the connection between the threaded hole 2131 and the third portion 123. Fig. 9 As shown, an extension column 2135 is provided at one end of the first side plate 213 away from the radiator 30, and a threaded hole 2131 is formed in the extension column 2135. Preferably, a guide surface is provided at one end of the threaded hole 2131 close to the radiator 30, which is conducive to screwing the third part 123 in.

[0080] In some embodiments, Fig.10 As shown, the second side plate 214 is generally plate-shaped. To facilitate the connection between the second side plate 214 and the first shell 211 and the second shell 212, a third connecting portion 2141 is provided on the second side plate 214, and the third connecting portion 2141 extends from the second side plate 214 toward the first side plate 213, and the third side plate 214 is fixed to the first shell 211 or the second shell 212 through the third connecting portion 2141.

[0081] In some embodiments, along the first direction x (the direction in which the first shell 211 extends toward the second shell 212), the two third connection parts 2141 are respectively located at the two ends of the second side plate 214, and the two third connection parts 2141 are respectively fixed to the first shell 211 and the second shell 212. Alternatively, in some embodiments, along the third direction z, the two third connection parts 2141 are respectively provided at the two ends of the second side plate 214, and the two third connection parts 2141 may be both fixed to the first shell 211, or both fixed to the second shell, or the two third connection parts 2141 may be respectively fixed to the first shell 211 and the second shell 212.

[0082] It can be understood that there can be multiple third connection parts 2141 , and at least two of the multiple third connection parts are located at two opposite ends of the second side plate 214 .

[0083] like Fig.10 As shown, the present application takes the two third connection parts 2141 arranged along the third direction z on the opposite sides of the second side plate 214 as an example for explanation, the two third connection parts 2141 are arranged close to the second shell 212, the third connection parts 2141 are provided with a fifth mounting hole 2142, and the second shell 212 is provided with a sixth mounting hole 2123 (as shown in FIG. Figure 7 As shown), the third fastener 40c (as Figure 5 The second side plate 214 is fixed to the second shell 212 by sequentially passing through the sixth mounting hole 2143 and the fifth mounting hole 2142.

[0084] In some embodiments, the third connection portion 2141 and the second side plate 214 are integrally formed.

[0085] To further enhance the stability of the housing 210, as Fig.10 As shown, the second side plate 214 is provided with a mounting portion 2143 at one end close to the first housing 211, and the mounting portion 2143 extends from the second side plate 214 to the first side plate 213. The mounting portion 2143 is provided with a seventh mounting hole 2144, and the first housing 211 is provided with an eighth mounting hole 2113 (as shown in FIG. Figure 6 As shown), the fourth fastener 40d (as shown Figure 5 As shown in FIG. 2 , the second side plate 214 is fixed to the first shell 211 by sequentially passing through the eighth mounting hole 2113 and the seventh mounting hole.

[0086] It can be understood that the mounting portion can be a structure formed on the second side plate, or can be a separate component connected to the second side plate by welding or other means.

[0087] In some embodiments, in order to prevent the fourth fastener 40d from protruding from the surface of the housing 210, a sunken surface is provided on the first housing 211, and the eighth mounting hole 2113 is provided on the sunken surface.

[0088] In some embodiments, Figure 5 As shown, the power supply device includes a first isolating member 50a and a second isolating member 50b, and the first isolating member 50a and the second isolating member 50b are both accommodated in the installation space 200. Specifically, the first isolating member 50a is located between the power supply body 220 and the first shell 211, and the second isolating member 50b is located between the power supply body 220 and the second shell 212. Further, the first isolating member 50a is fixed to the first shell 211, and the second isolating member 50b is fixed to the second shell 212. The first isolating member 50a and the second isolating member 50b can be used to reduce the interference of external signals on the one hand, and can be used as insulating plates on the other hand to ensure that the power supply body 220 is insulated from the first shell 211 and the second shell 212.

[0089] In some embodiments, Figure 5 As shown, the connector 60 is mounted on the second housing 212 and extends from the second side plate 214. For example, the connector 60 is riveted to the second housing 212. Fig.10 As shown, the second side plate 214 is provided with an escape opening 2145 , and the escape opening 2145 is used for allowing the connector 60 to extend out.

[0090] In some embodiments, Fig.11 As shown, the connector 60 includes a main body 610 and a plug-in portion 620 and a bending portion 630 connected to both ends of the main body 610. The main body 610 is used for riveting with the second shell 212, the plug-in portion 620 is used for extending out of the second side plate 214 and plugging with the frame, and the bending portion 630 is elastic and is used to reduce shaking during the plugging and unplugging process.

[0091] In some embodiments, the connection between the plug-in portion 620 and the main body portion 610 is in a stepped transition to allow for a certain range of installation errors between the power module and the frame.

[0092] In some embodiments, in order to increase the stability of plugging and unplugging, a rubber cap 640 is provided on the outer cover of the plug-in portion.

[0093] In some embodiments, a handle 70 is provided at one end of the second side plate 214 away from the first side plate. The handle 70 is used to facilitate pushing the power module 20 during the plugging and unplugging of the power module 20 and the frame.

[0094] In some embodiments, considering safety issues, a protective cover 80 is provided at one end of the heat sink 30 away from the power module. The protective cover 80 can be clamped on the heat sink 30, or fixed together by the locking screw 10. When the protective cover 80 is fixed by the locking screw 10, a hole is provided on the protective cover 80 for the first part of the locking screw to pass through, that is, a part of the first part 121 of the rod body 120 is provided in the mounting hole 310 of the heat sink 30, and another part of the first part 121 is provided in the hole on the protective cover.

[0095] The locking screw and power supply device of the embodiment of the present application divide the rod body into a first part, a second part and a third part, and design the diameter of the first part to be larger than the diameters of the second part and the third part, so that when the locking screw locks the power module, at least part of the first part is arranged in the mounting hole of the radiator, thereby reducing the floating of the radiator. At the same time, it can also reduce the risk of damaging the radiator during the plugging and unplugging of the power module and the frame, thereby extending the life of the power supply device.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Under the concept of the present application, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present application as described above, which are not provided in detail for the sake of simplicity. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A locking screw for fixing a heat sink to a power module, characterized in that: The heat sink is provided with a mounting hole, the power module is provided with a threaded hole, and the locking screw includes: Nut; a rod body, the rod body comprising a first portion, a third portion, and a second portion located between the first portion and the third portion, wherein an end of the first portion away from the second portion is connected to the compression surface of the nut, an outer side of the third portion is provided with an external thread, and the third portion is configured to be screwed into the threaded hole through the mounting hole; along a direction in which the heat sink extends toward the power module, the length of the second portion is less than the depth of the mounting hole, and the diameter of the first portion is greater than the diameters of the second portion and the third portion; Wherein, when the third part is screwed into the threaded hole, at least a portion of the first part is disposed in the mounting hole.

2. The locking screw according to claim 1, characterized in that A step portion is provided at the connection between the first portion and the second portion, and a diameter of the step portion gradually decreases along a direction in which the first portion extends toward the second portion.

3. The locking screw according to claim 2, characterized in that The diameter of the step portion away from the second portion is the same as the diameter of the first portion, and the diameter of the step portion away from the first portion is the same as the diameter of the second portion.

4. The locking screw according to claim 1, wherein The diameter of the external thread of the third portion is 3 mm; The diameter of the first portion is 3.25 mm to 3.35 mm.

5. The locking screw according to claim 1, wherein: The threaded hole is adapted to the external thread of the third portion, and the diameter of the threaded hole is smaller than the diameter of the first portion; and / or The diameter of the third portion is the same as the diameter of the second portion; and / or The outer side of the third part is coated with anti-fall glue.

6. A power supply device, plugged into a frame, characterized in that: include: The locking screw according to claims 1-5; radiator, including mounting holes; The power module includes a housing and a power main body, wherein the housing is provided with a threaded hole, the housing includes a first surface and a second surface arranged opposite to each other, the housing has an installation space, and the power main body is accommodated in the installation space; The heat sink is mounted on the first surface, and the second surface is configured to be plugged into the frame.

7. The power supply device according to claim 6, characterized in that: The housing includes a first housing, a second housing, a first side plate, and a second side plate, wherein the first housing and the second housing are buckled together to form the installation space; The installation space has a first opening and a second opening that are oppositely arranged, the first side panel is installed in the first opening, and the second side panel is installed in the second opening; The first surface is formed on the first side plate, and the second surface is formed on the second side plate.

8. The power supply device according to claim 7, wherein: A first connecting portion is provided on the first shell, and the first connecting portion extends from the first shell to the second shell. A second connecting portion is provided on the second shell, and the second connecting portion extends from the second shell to the first shell. One end of the first side plate is fixed to the first connecting portion, and the second end of the first side plate is fixed to the second connecting portion.

9. The power supply device according to claim 8, characterized in that: include: The first connecting portion is integrally formed with the first housing; and / or The second connecting portion is integrally formed with the second housing; and / or The first side panel is provided with a vent, and the radiator is mounted on the vent.

10. The power supply device according to claim 7, wherein: Including connectors, The plug-in connector is provided on the second shell and extends from the second side plate. The plug-in connector is used for plugging with the frame. A rubber cap is provided on one end of the plug-in connector.

Images