Loose screw assembly for replacing BCU module of energy storage high-voltage box

Abstract

The utility model relates to the technical field of module plugging in a high-voltage box in the energy storage field, in particular to a captive screw assembly for replacing a BCU module in an energy storage high-voltage box. The BCU module locking device is used for locking a BCU mainboard in a BCU module and a BCU box body, a plurality of lugs are arranged on the side edge of the BCU box body, each lug is provided with a mounting hole comprising a screw and a captive nut, the captive nut is mounted in the mounting hole, and the screw is in threaded fit with the captive nut; the screw comprises a nut and a screw rod, the nut is arranged on the screw rod, a polished rod portion is arranged in the middle of the screw rod, a front thread portion is arranged at the lower end of the screw rod, a root thread portion is arranged at the upper end of the screw rod, and the diameter of the front thread portion and the diameter of the root thread portion are both larger than the diameter of the polished rod portion. Drawing is achieved in a limited space, manufacturing is easy, cost is low, occupied space is small, operation is convenient, practicability and reliability are achieved, and tool installation is simple and easy to operate.

Description

Technical Field

[0001] The utility model relates to the technical field of module plugging and unplugging in a high-voltage box in the energy storage field, in particular to a non-loose screw assembly for replacing a BCU module in an energy storage high-voltage box. Background Art

[0002] Traditional handle structures take up a lot of space, are costly, and aren't suitable for modules with high space requirements. Some designs are also relatively complex. Some locking mechanisms require springs, sleeves, and screws, which are complex and expensive to manufacture. If all the threads are buds, they either extend too far, requiring more space, or fail to lock into place. Summary of the Invention

[0003] The technical problem to be solved by the present invention is: in order to solve the problems existing in the prior art in the above-mentioned background technology, a non-loose screw assembly for replacing the BCU module of an energy storage high-voltage box is provided which can be pulled out in a limited space, is simple to manufacture, has low cost, and occupies a small space.

[0004] The technical solution adopted by the utility model to solve the technical problem is: a captive screw assembly for replacing the BCU module of the energy storage high-voltage box is used to lock the BCU mainboard in the BCU module with the BCU box body. The side of the BCU box body is provided with a plurality of lugs, each of which is provided with a mounting hole, including a screw and a captive nut. The captive nut is installed in the mounting hole, and the screw and the captive nut are threadedly matched.

[0005] The screw includes a nut and a screw rod, wherein the nut is provided on the screw rod, the middle position of the screw rod is a smooth rod portion, the lower end of the screw rod is provided with a front screw thread portion, and the upper end of the screw rod is provided with a root screw thread portion, and the diameters of the front screw thread portion and the root screw thread portion are both larger than the diameter of the smooth rod portion.

[0006] Furthermore, the number of the captive nuts is two, and the captive nuts are provided with an internal thread portion that matches the front thread portion and the root thread portion.

[0007] Furthermore, the diameter of the polished rod portion is smaller than the diameter of the internal thread portion.

[0008] Furthermore, the diameter of the front thread portion is equal to the diameter of the root thread portion.

[0009] Furthermore, a slot is provided on the top surface of the nut, and a knurled portion for increasing friction is provided on the outer circumference of the nut.

[0010] Furthermore, the nut and the screw are an integrally formed structure or a split structure.

[0011] The beneficial effects of the utility model are as follows: the utility model realizes pulling in a limited space, is simple to manufacture, has low cost, occupies a small space, is convenient to operate, is practical and reliable, and the installation tool is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 It is a structural diagram of the utility model;

[0014] Figure 2 This is the front view of the screw of the utility model;

[0015] Figure 3 It is a diagram of the use state of the utility model;

[0016] In the figure: 1. Nut, 11. Slotted, 12. Knurled part,

[0017] 2. Screw, 21. Polished rod, 22. Front thread, 23. Root thread,

[0018] 3. Capable nut, 31. Internal thread,

[0019] 4. Mounting holes. DETAILED DESCRIPTION

[0020] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner.

[0021] like Figures 1 to 3 The illustrated embodiment shows a captive screw assembly for replacing a BCU module in an energy storage high-voltage box, which is used to secure the BCU mainboard to the BCU box. The BCU box has several lugs on its sides, each with a mounting hole 4 formed therein. The lugs include screws and captive nuts 3, which are installed in the mounting holes 4, with the screws and captive nuts 3 threadedly engaged with each other.

[0022] The screw includes a nut 1 and a screw rod 2, wherein the nut 1 is provided on the screw rod 2, and the middle position of the screw rod 2 is a smooth rod portion 21. The purpose of the smooth rod portion 21 is to facilitate quick plugging and unplugging and increase user experience. The lower end of the screw rod 2 is provided with a front screw thread portion 22. The purpose of the front screw thread portion 22 is equivalent to an inverted buckle when the BCU motherboard is pulled out, so as to prevent the screw from being pulled out and failing. The upper end of the screw rod 2 is provided with a root screw thread portion 23. The purpose of the root screw thread portion 23 is to fix the nut 1 after the BCU motherboard is inserted to prevent the screw from loosening and shaking, affecting the appearance. The root screw thread portion 23 is located on the screw rod 2 at the connection between the screw rod 2 and the nut 1. The diameter of the front screw thread portion 22 and the diameter of the root screw thread portion 23 are both larger than the diameter of the smooth rod portion 21.

[0023] There are two captive nuts 3 , each of which is provided with an internal thread portion 31 that matches the front thread portion 22 and the root thread portion 23 .

[0024] like Figure 2 As shown, the diameter of the polished rod portion 21 is smaller than the diameter of the internal thread portion 31 .

[0025] The diameter of the front thread portion 22 is equal to the diameter of the root thread portion 23 .

[0026] A slot 11 is provided on the top surface of the nut 1. The slot 11 can be used to install the screw with the help of auxiliary tools, or it can be a slot of other shapes; a knurled portion 12 is provided on the outer circumference of the nut 1 to increase friction, thereby increasing friction and facilitating manual tightening and loosening of the screw.

[0027] According to customer requirements, the nut 1 and the screw 2 are of an integrally formed structure or a split structure, and the integrally formed structure is generally selected.

[0028] Working process:

[0029] Step 1: If Figure 3 As shown, two captive nuts 3 are respectively installed in the mounting holes 4 of the two lugs. The distance between the two lugs is equal to the length of the screw 2. At the same time, the pins on both sides of the BCU motherboard are located between the two lugs, and the through holes on the pins are coaxially arranged with the mounting holes 4 of the lugs.

[0030] Step 2: Insert the BCU motherboard and manually tighten the screws on the outside of the energy storage high-voltage box. The screws pass through a captive nut 3, the module, and another captive nut 3 in sequence. Finally, the worker tightens the nut 1. The front thread portion 22 and the root thread portion 23 respectively engage with the corresponding captive nut 3 threads, completing the installation and forming a locked state.

[0031] If the module needs to be pulled out, the worker rotates the nut 1, loosens the front thread part 22 from the captive nut 3, pulls out the screw, and then pulls out the BCU mainboard to complete the removal of the BCU mainboard. At this time, the screw is limited in the captive nut 3 and will not fall off.

[0032] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A non-loose screw assembly for replacing a BCU module in an energy storage high-voltage box, used to lock the BCU mainboard and the BCU box in the BCU module, wherein the side of the BCU box is provided with a plurality of lugs, each of which is provided with a mounting hole (4), characterized in that: It comprises a screw and a captive nut (3), wherein the captive nut (3) is installed in a mounting hole (4), and the screw and the captive nut (3) are threadedly matched; The screw comprises a nut (1) and a screw rod (2), wherein the nut (1) is provided on the screw rod (2), the middle position of the screw rod (2) is a polished rod portion (21), the lower end of the screw rod (2) is provided with a front screw thread portion (22), and the upper end of the screw rod (2) is provided with a root screw thread portion (23), and the diameters of the front screw thread portion (22) and the root screw thread portion (23) are both larger than the diameter of the polished rod portion (21).

2. The captive screw assembly for replacing a BCU module of an energy storage high-voltage box according to claim 1 is characterized in that: The number of the captive nuts (3) is two, and the captive nuts (3) are provided with an internal thread portion (31) matched with the front thread portion (22) and the root thread portion (23).

3. The captive screw assembly for replacing a BCU module of an energy storage high-voltage box according to claim 2, characterized in that: The diameter of the polished rod portion (21) is smaller than the diameter of the internal thread portion (31).

4. The captive screw assembly for replacing a BCU module of an energy storage high-voltage box according to claim 1, characterized in that: The diameter of the front screw thread portion (22) is equal to the diameter of the root screw thread portion (23).

5. The captive screw assembly for replacing a BCU module of an energy storage high-voltage box according to claim 1, characterized in that: A slot (11) is provided on the top surface of the nut (1), and a knurled portion (12) for increasing friction is provided on the outer circumference of the nut (1).

6. The captive screw assembly for replacing a BCU module of an energy storage high-voltage box according to claim 1, characterized in that: The nut (1) and the screw (2) are of an integrally formed structure or a split structure.

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