A punching device for a pallet nut

Abstract

The utility model discloses a kind of punching device of supporting plate nut, including, bottom plate is arranged in L shape, one end of bottom plate is provided with first positioning hole, the two sides of bottom plate positioning hole are respectively provided with first straight hole;Upper cover is arranged in one side of bottom plate, one end of upper cover is provided with second positioning hole, second positioning hole and first positioning hole axis coincide;The two sides of second positioning hole are respectively provided with second straight hole, second straight hole and first straight hole axis coincide;The other end of bottom plate and the other end of upper cover are fixedly connected, cavity is formed between bottom plate and upper cover;Positioning pin passes through first positioning hole and second positioning hole setting.This punching device of supporting plate nut saves the time of punching positioning when installing supporting plate nut on unmanned aerial vehicle composite shell, improves the safety of worker punching operation, device uses threaded positioning pin to carry out the clamping positioning of part, realizes the quick clamping and disassembly of part by device, reduces the operation time of worker.

Description

Technical Field

[0001] This utility model relates to the field of aircraft structure assembly technology, and in particular to a drilling device for a tray nut. Background Technology

[0002] In recent years, the assembly process has become a critical stage in aircraft manufacturing, ensuring the structural integrity, reliability, and safety of the aircraft. As a high-load-bearing fastener base widely used in components such as the fuselage and wings, the installation quality of the plate nut directly affects the connection strength and fatigue life of structures such as the aircraft skin, stringers, and frames. Therefore, the positioning and drilling accuracy of the plate nut mounting holes is a crucial and fundamental aspect of aircraft assembly processes.

[0003] Currently, in the assembly process, operators first need to use a steel ruler to measure point by point on the surface of the aircraft structural components according to the theoretical coordinate dimensions on the design drawings. By repeatedly moving and comparing the ruler, preliminary marks are made at the corresponding positions with a marker. Then, the marked points are connected to draw a baseline and a crosshair center line to determine the final hole positions. After completing the marking, the operator uses a hand drill or a simple drill jig to drill holes at the center of the marking based on experience.

[0004] This traditional manual drilling and positioning technique has many significant problems. Accuracy is difficult to guarantee and consistency is poor. Measurement errors from steel rulers, the thickness of marker lines, and subjective biases in human interpretation all accumulate in the final hole position accuracy, resulting in large hole position dispersion. This makes it difficult to meet the stringent requirements of modern aircraft for high interchangeability and coordination. This technique heavily relies on the individual experience of highly skilled technicians, leading to long training cycles and difficulties in standardizing process quality management and data traceability. It is also ill-suited to the digital and intelligent development trends of modern aerospace manufacturing. Summary of the Invention

[0005] In view of the problems existing in the drilling device for the aforementioned support plate nut, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a drilling device for pallet nuts. The purpose is to save the time of drilling and positioning when installing pallet nuts on the composite shell of drones and to improve the safety of workers during drilling operations. The device uses threaded positioning pins to clamp and position the parts, and realizes the quick clamping and disassembly of the parts, reducing the workers' operation time.

[0007] To solve the above-mentioned technical problems, this utility model provides the following technical solution: including, The base plate is L-shaped, with a first positioning hole at one end and a first straight hole on each side of the positioning hole.

[0008] The top cover is disposed on one side of the base plate. A second positioning hole is provided at one end of the top cover, and the second positioning hole coincides with the axis of the first positioning hole. Second straight holes are provided on both sides of the second positioning hole, and the second straight holes coincide with the axis of the first straight holes. The other end of the base plate is fixedly connected to the other end of the top cover, and a cavity is formed between the base plate and the top cover.

[0009] A positioning pin is provided, which passes through the first positioning hole and the second positioning hole.

[0010] As a preferred embodiment of the drilling device for the support plate nut of this utility model, a limiting block is provided in the cavity, the two sides of the limiting block are attached to the lower surface of the upper cover and the upper surface of the base plate, the limiting block is slidable in the cavity, and the distance between the limiting block and the first positioning hole is adjusted by sliding.

[0011] As a preferred embodiment of the drilling device for the support plate nut of this utility model, a threaded hole is provided at the other end of the base plate, and a push-pull rod connected to the limiting block is provided at the end of the base plate. The push-pull rod passes through the threaded hole and is horizontally disposed in the cavity. The push-pull rod is fixedly connected to the center of the limiting block, and the position of the limiting block is adjusted by the push-pull rod.

[0012] In a preferred embodiment of the drilling device for the support plate nut of this utility model, windows are respectively opened on the surfaces of the base plate and the top cover, and the centers of the windows on both sides coincide.

[0013] In a preferred embodiment of the drilling device for the support plate nut of this utility model, the limiting block is arranged in a cross shape and is fitted into the windows on both sides, through which the position of the limiting block can be observed.

[0014] In a preferred embodiment of the drilling device for the support plate nut of this utility model, a scale is provided on one side of the window, and the position of the limiting block is determined by the scale.

[0015] As a preferred embodiment of the drilling device for the support plate nut of this utility model, the following is provided: the inner side of the two first straight holes is provided with the first positioning hole, the outer side of the two first straight holes is provided with the third mounting hole, the third mounting hole is provided with the clamping screw, and the clamping screw passes through the mounting hole from the other side of the base plate.

[0016] In a preferred embodiment of the drilling device for the support plate nut of this utility model, the positioning pin is threadedly engaged with the positioning hole.

[0017] In a preferred embodiment of the drilling device for the support plate nut of this utility model, a threaded bushing is provided inside the limiting block, and the push-pull rod is connected to the limiting block through the threaded bushing.

[0018] In a preferred embodiment of the drilling device for the support plate nut of this utility model, the base plate and the top cover are connected by four GB / T 70.1-2000 M3×8 internal hexagon head screws.

[0019] The beneficial effects of this utility model are as follows: This invention provides a drilling device for a pallet nut. The threaded locating pin in the device acts as a part positioning device, improving the positioning accuracy of straight holes and enhancing the reliability of hole drilling compared to traditional manual positioning methods. It also reduces the drilling and positioning time when installing the pallet nut. The device's structure is easy to operate, consisting of only a few parts, facilitating component replacement and improving its practicality. This device enables rapid clamping and disassembly of parts, reducing worker operation time. Compared to traditional manual positioning, it improves worker safety. With overall dimensions of only 38*36*14mm, it is compact, lightweight, and easy to carry. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of Embodiment 1 is shown; Figure 2 A schematic diagram of the structure of Embodiment 2 is shown; Figure 3 A schematic diagram of the structure of Embodiment 3 is shown; Figure 4 A schematic diagram of the structure of Embodiment 4 is shown; Figure 5 A schematic diagram of the back structure of Embodiment 4 is shown. Detailed Implementation

[0022] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0023] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0024] Example 1, referring to Figure 1 The first embodiment of this utility model provides a drilling device for a support plate nut, which includes: The base plate is L-shaped, with a first positioning hole at one end and a first straight hole on each side of the positioning hole.

[0025] The top cover is located on one side of the base plate. A second positioning hole is provided at one end of the top cover, and the second positioning hole coincides with the axis of the first positioning hole. Second straight holes are provided on both sides of the second positioning hole, and the second straight holes coincide with the axis of the first straight hole. The other end of the base plate is fixedly connected to the other end of the top cover, and a cavity is formed between the base plate and the top cover.

[0026] A positioning pin is provided, which passes through the first positioning hole and the second positioning hole.

[0027] The base plate, serving as the mounting foundation for the entire assembly, is characterized by its "L-shaped" structure. The base plate should ideally be made of a material with sufficient strength and rigidity, with 2A12 aluminum alloy as the raw material, which can be replaced with Q235 tempered steel. It is first formed into a precise L-shape through stamping or machining. The first positioning hole is located at the center of the longer side (or "base arm") of the L-shaped base plate. This first positioning hole serves as the mounting base for the positioning pin, and its diameter needs to be determined based on the through holes on the drone's composite shell. Using the center of the first positioning hole as a reference, first straight holes are machined symmetrically on both sides. The centers of these three holes should be on the same straight line, and the distance between the two first straight holes and the first positioning hole should be consistent to ensure balanced force distribution.

[0028] The top cover is typically a flat plate, and its material can be the same as or compatible with the base plate. At the end of the top cover corresponding to the base plate, a second positioning hole and two second straight holes on both sides are machined. The position and size of the second positioning hole correspond perfectly to the first positioning hole on the base plate, ensuring axis coincidence. Second straight holes are provided on both sides of the second positioning hole, and the position and size of the second straight holes on both sides correspond to the two first straight holes on the base plate, respectively, ensuring axis coincidence. Two bushings are installed in the second straight holes to reduce wear on the tooling during repeated drilling. A pistol drill holding a 2.5mm diameter dagger drill is used to drill through the second straight holes in the drone composite shell via rotational motion. After the dagger drill bit passes through the first straight hole, the drilling of the drone composite shell is completed, facilitating the subsequent installation of the support plate nut on the drone composite shell. The top cover is then placed on the base plate, ensuring precise alignment of the holes. At this point, the other end of the L-shape of the base plate (i.e., the shorter end, or "upright arm") is fixedly connected to the corresponding end of the top cover using the aforementioned hexagonal head screws. Once both ends are fixed, the base plate, top cover, and L-shaped support arm of the base plate together form a hollow cavity with a certain capacity, which is used to accommodate the composite shell of the drone.

[0029] Furthermore, the locating pin engages with the threaded locating hole.

[0030] The locating pin is designed with an external thread structure. During installation, the drone composite shell is placed in the cavity, and the threaded locating pin is screwed into the first locating hole, the drone composite shell, and the second locating hole sequentially from one side of the top cover. The locating pin is tightened by rotating until it reaches the appropriate preload, thus positioning the drone composite shell. This threaded connection method not only provides precise radial positioning but also has good tensile strength, preventing the drone composite shell from moving due to vibration.

[0031] Furthermore, the base plate and the top cover are connected by four GB / T 70.1-2000 M3×8 socket head cap screws.

[0032] Specifically, four hex socket head cap screws were selected strictly according to the "GB / T 70.1-2000 M3×8" standard. This standard specifies the screw's dimensions, tolerances, and mechanical properties; M3 indicates a nominal diameter of 3 mm, and 8 indicates a nominal screw length of 8 mm. On the other end of the base plate and top cover that needs to be fixed (i.e., the end without the locating pin), corresponding screw through holes and threaded holes were pre-drilled or tapped. After aligning the holes in the top cover and base plate, the four screws were evenly tightened using a suitable hex wrench.

[0033] During operation, the L-shaped base plate is first fixed to the workbench, placing it at the bottom of the device, with the top cover mounted on top of the base plate. The composite material shell of the drone to be processed is placed in the cavity between the base plate and the top cover. Then, a threaded locating pin is inserted through the second locating hole on the outside of the top cover, passing sequentially through the second locating hole of the top cover, the pre-set through hole on the drone composite material shell, and the first locating hole at one end of the base plate. The locating pin is tightened, ensuring a tight fit between its threaded section and the walls of each hole, thus achieving reliable positioning and clamping of the drone composite material shell. After the locating pin is locked and the relative positions of all components are fixed, a pistol drill equipped with a 2.5mm diameter dagger drill is placed perpendicular to the outer surface of the top cover, and the drill bit is guided into the second straight hole of the top cover. The pistol drill is started, and its rotational motion drills holes in the drone composite material shell. When the dagger drill penetrates to the first straight hole in the base plate, a bottom hole for installing the support plate nut is formed on the drone composite material shell. Finally, the threaded locating pin is removed, the processed drone composite material shell is taken out, and the support plate nut is assembled according to the drilled bottom hole.

[0034] Example 2, refer to Figure 2 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a first positioning hole is provided on the inner side of the two first straight holes, and a third mounting hole is provided on the outer side of the two first straight holes respectively. A clamping screw is provided in the third mounting hole, and the clamping screw passes through the mounting hole from the other side of the base plate.

[0035] On the base plate, two first positioning holes are machined inside the two first straight holes to engage with the positioning pins of the top cover for core positioning. On the outer side of the two first straight holes (i.e., the side away from the bending area and closer to the edge of the base plate), third mounting holes are symmetrically machined. These third mounting holes are threaded holes. A clamping screw passes through the third mounting hole from below the base plate (i.e., the side opposite to where the drone composite shell is placed), and its screw tip applies pressure to the periphery of the area to be processed on the drone composite shell or to a dedicated pressure block. By tightening the clamping screw, a clamping force perpendicular to the working plane of the base plate is generated, effectively resisting the axial force and cutting torque generated by the drill bit during drilling, preventing the drone composite shell from shifting or vibrating, and ensuring the stability of the processing and the accuracy of the bottom hole position.

[0036] The remaining structure is the same as that in Example 1.

[0037] During operation, the L-shaped base plate is first fixed to the workbench, placing it at the bottom of the device, with the top cover mounted on top of the base plate. The composite material shell of the drone to be processed is placed in the cavity between the base plate and the top cover, and initially positioned. Then, a threaded locating pin is inserted through the second locating hole on the outside of the top cover, passing sequentially through the second locating hole of the top cover, the pre-set through hole on the drone composite material shell, and the first locating hole on the inside of the base plate. The locating pin is tightened, ensuring a tight fit between its threaded section and the walls of each hole, achieving core positioning of the drone composite material shell. After core positioning, two clamping screws are screwed into the third mounting hole located outside the first straight hole from below the base plate, and gradually tightened until the screw tips are firmly pressed against the corresponding areas of the drone composite material shell, providing additional clamping force at the drilling station and ensuring processing stability. After positioning and clamping are complete, a pistol drill equipped with a 2.5mm diameter dagger drill is placed perpendicular to the outer surface of the top cover, and the drill bit is guided into the second straight hole of the top cover. The pistol drill is started, and its rotational motion is used to drill holes in the drone composite material shell. When the dagger drill penetrates to the first straight hole in the base plate, a bottom hole for installing the tray nut will be formed in the drone composite shell. Finally, first loosen and remove the clamping screws under the base plate, then remove the threaded locating pin, take out the machined drone composite shell, and assemble the tray nut according to the bottom hole.

[0038] Example 3, referring to Figure 3 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that a limiting block is provided in the cavity, and the two sides of the limiting block are attached to the lower surface of the upper cover and the upper surface of the bottom plate. The limiting block can slide in the cavity, and the distance between the limiting block and the first positioning hole can be adjusted by sliding.

[0039] The device is equipped with a limiting block inside the cavity. The two sides of the limiting block are precisely fitted to the lower surface of the top cover and the upper surface of the base plate to ensure that it can slide smoothly along a predetermined trajectory inside the cavity. Its core function is to adjust the distance between the working surface of the limiting block and the axis of the first positioning hole by sliding, so as to adapt to the composite shell of drones of different sizes.

[0040] Compared to Embodiment 2, the other end of the base plate is provided with a threaded hole, and the end of the base plate is provided with a push-pull rod connected to the limiting block. The push-pull rod passes through the threaded hole and is horizontally set in the cavity. The push-pull rod is fixedly connected to the center of the limiting block, and the position of the limiting block is adjusted by the push-pull rod.

[0041] A threaded hole is machined at the other end of the base plate (the end furthest from the first positioning hole). A push-pull rod is screwed into this threaded hole from the end of the base plate at this end and extends horizontally into the cavity, with its axis aligned with the sliding direction of the limiting block. The inner end of the push-pull rod is fixedly connected to the center of the limiting block via threads or a shoulder. By rotating the push-pull rod clockwise or counterclockwise, the rotational motion can be converted into linear displacement of the limiting block, thereby precisely and reliably adjusting its position in the cavity and achieving flexible positioning support for workpieces of different specifications.

[0042] Furthermore, a threaded bushing is provided inside the limit block, and the push-pull rod is connected to the limit block through the threaded bushing.

[0043] To achieve a durable, stable, and easy-to-maintain connection between the push-pull rod and the limit block, this device incorporates a threaded bushing inside the limit block. A through hole or blind hole is machined at the center of the limit block body, and a pre-fabricated threaded bushing is then pressed into this hole with an interference fit. The threaded bushing should be made of a material that is more wear-resistant and stronger than the limit block body material, and its inner hole is machined with a precision thread matching the push-pull rod. The push-pull rod is screwed into the threaded hole at the end of the base plate, passes horizontally through the cavity, and finally screws into and is secured to the threaded bushing inside the limit block. Through this design, the rotational motion of the push-pull rod is effectively transmitted to the limit block through the threaded bushing, converting it into its precise linear movement. The core advantage of this structure is that it concentrates the main friction and wear on the replaceable threaded bushing, thereby protecting the more valuable and structurally complex limit block body and push-pull rod, greatly improving the service life and maintenance economy of the entire adjustment mechanism.

[0044] The remaining structure is the same as that in Example 2.

[0045] During operation, the L-shaped base plate is first fixed to the worktable. The drone composite shell is placed in the cavity between the base plate and the top cover, with the drone composite shell abutting against the limiting block inside the cavity. Based on the position of the preset through hole of the drone composite shell to be processed, the limiting block inside the cavity is adjusted to the appropriate position by rotating the push-pull rod, ensuring that the second positioning hole, the preset through hole of the drone composite shell, and the first positioning hole are perfectly aligned, guaranteeing axis coincidence. A threaded positioning pin is inserted from the second positioning hole on the outside of the top cover, passing through the second positioning hole of the top cover, the preset through hole on the drone composite shell, and the first positioning hole on the inside of the base plate in sequence. The positioning pin is tightened to achieve core positioning. After core positioning is completed, the clamping screw is screwed into the third mounting hole from below the base plate and tightened to provide additional clamping force to the workpiece. After positioning and clamping are completed, a pistol drill equipped with a 2.5mm diameter dagger drill is placed perpendicular to the outer surface of the top cover, and the drill bit is guided into the second straight hole of the top cover. The pistol drill is then started for drilling. When the dagger drill penetrates to the first straight hole of the base plate, the preparation of the bottom hole is complete. Finally, loosen and remove the clamping screws, then remove the threaded locating pins to remove the processed drone composite shell from the device for subsequent tray nut installation.

[0046] Example 4, refer to Figure 4 , Figure 5 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that windows are opened on the surfaces of the base plate and the top cover, and the centers of the windows on both sides coincide.

[0047] To facilitate quick and accurate setting of the limit block position, observation windows are provided on the corresponding surfaces of the base plate and the top cover. When the device is closed, the center lines of these two windows coincide, forming a visual channel that runs through the base plate and the top cover.

[0048] Compared to Embodiment 3, the limiting block is further arranged in a cross shape and is fitted into the windows on both sides, allowing the position of the limiting block to be observed through the windows.

[0049] In this embodiment, the limiting block is designed as a cross-shaped structure, having a central body and outwardly extending guide portions. This cross-shaped limiting block is directly fitted into the through space formed by the two side windows, with its upper and lower surfaces respectively conforming to the lower surface of the upper cover and the upper surface of the base plate, allowing it to slide smoothly within it. The operator can directly observe the displacement of the cross-shaped limiting block through these overlapping windows.

[0050] Furthermore, a scale is set on one side of the window to determine the position of the limiting block.

[0051] To further achieve precise positioning, a fine scale is installed on the edge of the window on the top cover. The baseline of this scale is aligned with the axis of the first positioning hole. By reading the scale value corresponding to the upper edge of the cross-shaped limit block, the real-time distance between the limit block and the first positioning hole can be directly and accurately determined, thus achieving rapid and accurate pre-positioning without the need for additional measuring tools.

[0052] The remaining structure is the same as that in Example 3.

[0053] During operation, first, fix the L-shaped base plate to the worktable. Place the drone composite shell in the cavity between the base plate and the top cover, with the drone composite shell abutting against the limiting block inside the cavity. Based on the position of the preset through hole of the drone composite shell to be processed, observe the scale on the window of the top cover and rotate the push-pull rod to precisely adjust the cross-shaped limiting block inside the cavity to the required position, so that the second positioning hole, the preset through hole of the drone composite shell, and the first positioning hole are completely aligned, ensuring that the axis coincides. Insert the threaded positioning pin into the second positioning hole on the outside of the top cover, so that it passes through the second positioning hole of the top cover, the preset through hole on the drone composite shell, and the first positioning hole on the inside of the base plate in sequence. Tighten the positioning pin to achieve core positioning. After completing the core positioning, screw the clamping screw into the third mounting hole from below the base plate and tighten it to provide additional clamping force for the workpiece. After all positioning and clamping are completed, place the pistol drill equipped with a 2.5mm diameter dagger drill perpendicular to the outer surface of the top cover, guide the drill bit into the second straight hole of the top cover, and start the pistol drill for drilling. Once the dagger drill penetrates to the first straight hole in the base plate, the preparation of the bottom hole is complete. Finally, loosen and remove the clamping screws, then remove the threaded locating pins to remove the processed drone composite shell from the device for subsequent installation of the support plate nuts.

[0054] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of this invention. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims. Furthermore, for the purpose of providing a concise description of the exemplary embodiments, not all features of the actual embodiments (i.e., those features not relevant to the currently considered best mode for carrying out this invention, or those features not relevant to implementing this invention) may be omitted.

[0055] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A drilling device for a support plate nut, characterized in that: include, The base plate is L-shaped, with a first positioning hole at one end and a first straight hole on each side of the positioning hole. as well as, The top cover is disposed on one side of the base plate. A second positioning hole is provided at one end of the top cover, and the second positioning hole coincides with the axis of the first positioning hole. Second straight holes are provided on both sides of the second positioning hole, and the second straight holes coincide with the axis of the first straight holes. The other end of the base plate is fixedly connected to the other end of the top cover, and a cavity is formed between the base plate and the top cover. A positioning pin is provided, which passes through the first positioning hole and the second positioning hole.

2. The drilling device for the support plate nut according to claim 1, characterized in that: A limiting block is provided inside the cavity. The limiting block is attached to the lower surface of the upper cover and the upper surface of the bottom plate on both sides. The limiting block can slide inside the cavity, and the distance between the limiting block and the first positioning hole can be adjusted by sliding.

3. The drilling device for the support plate nut according to claim 2, characterized in that: The other end of the base plate is provided with a threaded hole, and the end of the base plate is provided with a push-pull rod connected to the limiting block. The push-pull rod passes through the threaded hole and is horizontally set in the cavity. The push-pull rod is fixedly connected to the center of the limiting block, and the position of the limiting block is adjusted by the push-pull rod.

4. The drilling device for the support plate nut according to claim 3, characterized in that: Windows are respectively opened on the surfaces of the base plate and the top cover, and the centers of the windows on both sides coincide.

5. The drilling device for the support plate nut according to claim 4, characterized in that: The limiting block is arranged in a cross shape and is fitted into the windows on both sides, through which the position of the limiting block can be observed.

6. The drilling device for the support plate nut according to claim 5, characterized in that: A scale is set on one side of the window, and the position of the limiting block is determined by the scale.

7. The drilling device for the support plate nut according to claim 1, characterized in that: The first positioning hole is provided on the inner side of the two first straight holes, and the third mounting hole is provided on the outer side of the two first straight holes respectively. The clamping screw is provided in the third mounting hole and passes through the mounting hole from the other side of the base plate.

8. The drilling device for the support plate nut according to claim 1, characterized in that: The locating pin is threaded into the locating hole.

9. The drilling device for the support plate nut according to claim 4, characterized in that: A threaded bushing is provided inside the limiting block, and the push-pull rod is connected to the limiting block through the threaded bushing.

10. The drilling device for the support plate nut according to claim 2, characterized in that: The base plate and the top cover are connected by four GB / T 70.1-2000 M3×8 socket head cap screws.

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