Anti-falling nut plate

Abstract

The utility model relates to an anti-falling nut plate which comprises a base plate, a fixing block is fixedly connected to the center of the bottom of the base plate, a round hole used for installing a bolt is formed in the bottom of the fixing block, and the top of the round hole extends upwards and penetrates through the base plate. The threaded sleeve is arranged in the round hole in a sliding mode, and internal threads in threaded connection with the bolt are formed in the inner hole wall of the threaded sleeve. The utility model relates to the technical field of nut plates. According to the anti-falling nut plate, the threaded sleeve is arranged, the inclined face is arranged on the peripheral wall of the threaded sleeve, and meanwhile the guide hole attached to the inclined face is formed in the round hole, so that the threaded sleeve is pulled by a bolt to move upwards when connected with the bolt, and therefore the threaded sleeve is pressed to deform to extrude the bolt; the bolt is clamped while the threaded sleeve fastens the bolt in a threaded mode, the fastening performance of the bolt can be effectively improved, the bolt and the nut plate are prevented from loosening, and therefore the practicability of the nut plate is improved.

Description

Technical Field

[0001] This utility model relates to the field of nut plate technology, and in particular to a nut plate that prevents detachment. Background Technology

[0002] A nut plate is a metal fitting specifically designed for fastening. Its primary function is to provide a secure threaded fastening point. It is typically installed in locations where direct nut fastening is difficult, such as confined spaces or components requiring frequent disassembly and assembly. Nut plates are frequently used in aerospace, automotive manufacturing, machinery, and electronic devices.

[0003] In existing technologies, bolts and nuts are subjected to repeated stresses in environments with high vibration or dynamic loads, depending on the working conditions of the machinery. Without anti-loosening measures, the nuts may gradually loosen under vibration, leading to connection failure and even safety hazards. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a nut plate that prevents detachment, so as to solve the technical problems mentioned in the background art.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0006] A nut plate designed to prevent detachment includes a base plate, a fixing block fixedly connected to the bottom center of the base plate, a circular hole for mounting bolts being opened at the bottom of the fixing block, the top of the circular hole extending upward and penetrating the base plate.

[0007] A threaded sleeve is slidably disposed in a circular hole, and the inner wall of the threaded sleeve is provided with an internal thread for threaded connection with a bolt.

[0008] The outer diameter of the threaded sleeve gradually increases from top to bottom so that the outer diameter of the threaded sleeve forms an inclined surface. A guide hole is provided at the bottom of the circular hole, and the inner wall of the guide hole fits against the inclined surface of the threaded sleeve.

[0009] The bottom of the threaded sleeve has a ring array of multiple square grooves.

[0010] Furthermore, the bottom diameter of the threaded sleeve is the same as the bottom opening diameter of the guide hole, and the depth of the guide hole is greater than the length of the threaded sleeve.

[0011] Furthermore, an elastic washer is fixedly connected between the top of the threaded sleeve and the guide hole, and the inner wall of the elastic washer is smaller than the major diameter of the internal thread of the threaded sleeve.

[0012] Furthermore, the inner wall of the guide hole is symmetrically provided with two protrusions forming limiting blocks, and the outer wall of the threaded sleeve is provided with a sliding groove that slides and connects with the limiting blocks.

[0013] Furthermore, a circular groove is formed at the top of the substrate at the circular hole, and a buffer washer is fixedly connected inside the circular groove.

[0014] In summary, this utility model has at least one of the following beneficial technical effects:

[0015] 1. This type of anti-loosening nut plate, by setting a threaded sleeve with an inclined surface on the outer peripheral wall and a guide hole in the round hole that fits with the inclined surface, allows the threaded sleeve to be pulled upward by the bolt when connected to the bolt, thereby causing the threaded sleeve to deform under pressure and squeeze the bolt. This tightens the bolt while clamping it, effectively improving the bolt's tightening performance, preventing the bolt from loosening from the nut plate, and thus improving the practicality of the nut plate.

[0016] 2. This type of anti-loosening nut plate, through the setting of an elastic washer, can block the transmission of vibration, effectively reducing the stress on the threaded sleeve and bolt. By making the inner diameter of the elastic washer smaller than the major diameter of the internal thread of the threaded sleeve, the bolt can squeeze the elastic washer during installation, making the bolt and the elastic washer fit tightly together, which can further improve the vibration resistance of the bolt fastener during use. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying 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.

[0018] Figure 1 This is a schematic diagram of the structure of a nut plate for preventing detachment according to the present invention.

[0019] Figure 2 This is an exploded view of a nut plate designed to prevent detachment according to this utility model.

[0020] Figure 3 This is a schematic diagram of the internal structure of a nut plate for preventing detachment according to the present invention.

[0021] Figure 4 This is a side view of a nut plate for preventing detachment according to the present invention.

[0022] In the figure, 1 is the base plate; 2 is the threaded sleeve; 3 is the fixing block; 4 is the round hole; 5 is the inclined surface; 6 is the guide hole; 7 is the square groove; 8 is the elastic washer; 9 is the limiting block; 10 is the sliding groove; 11 is the round groove; and 12 is the buffer washer. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Example:

[0025] Reference Figure 1 - Figure 4 The present invention discloses a nut plate for preventing detachment, comprising a base plate 1, a fixing block 3 fixedly connected at the bottom center of the base plate 1, a round hole 4 for installing bolts being opened at the bottom of the fixing block 3, and the top of the round hole 4 extending upward and penetrating the base plate 1.

[0026] The threaded sleeve 2 is slidably disposed in the circular hole 4, and the inner wall of the threaded sleeve 2 is provided with an internal thread for threaded connection with the bolt.

[0027] The outer peripheral wall diameter of the threaded sleeve 2 gradually increases from top to bottom so that the outer peripheral wall of the threaded sleeve 2 forms an inclined surface 5. A guide hole 6 is provided at the bottom of the circular hole 4, and the inner wall of the guide hole 6 fits against the inclined surface 5 of the threaded sleeve 2.

[0028] The bottom of the threaded sleeve 2 has a ring array of multiple square grooves 7.

[0029] In this embodiment, observation Figure 1 It can be seen that by fixing a block 3 to the bottom of the substrate 1, and by providing a round hole 4 for mounting bolts in the block 3 and the substrate 1, bolts can be easily installed when connecting bolt fasteners and nut plates.

[0030] Since the nut plate is used in equipment with high-frequency vibration, the nut fastener will be subjected to high-frequency vibration and reverse, causing the nut fastener to loosen due to vibration, causing the nut to separate from the nut plate, which seriously affects the fastening performance of the fastener.

[0031] Therefore, observe Figure 4 It can be observed that a threaded sleeve 2 is slidably disposed within the circular hole 4 for connection with the bolt thread, allowing the bolt fastener to be tightened during installation. To prevent the bolt fastener from loosening due to vibration after installation, the outer diameter of the threaded sleeve 2 gradually increases from top to bottom, forming a smooth inclined surface 5. Simultaneously, a guide hole 6 is provided at the bottom of the circular hole 4, fitting against the inclined surface 5. When the threaded sleeve 2 is connected to the bolt, as the bolt is continuously tightened, the threaded sleeve 2 is pulled upwards by the bolt thread, causing it to be compressed and deformed by the inner wall of the guide hole 6. This results in the threaded sleeve 2 applying stronger pressure to the bolt, effectively increasing the friction during bolt installation and thus improving the anti-loosening performance of the nut plate.

[0032] And observation Figure 3It can be observed that multiple square grooves 7 are arranged in an annular array at the bottom of the threaded sleeve 2, which makes it easier for the threaded sleeve 2 to deform when it is squeezed by the inner wall of the guide hole 6, thereby making it easier to clamp the bolt, effectively reducing the difficulty of bolt installation and improving bolt installation efficiency.

[0033] Because the threaded sleeve 2 is tightly connected to the bolt thread, and the outer wall of the threaded sleeve 2 is also tightly fitted to the inner wall of the guide hole 6, the threaded sleeve 2 only undergoes a slight deformation when compressed, which is used to clamp the already tightly contacted bolt, thereby improving the anti-loosening performance. Therefore, when disassembly is required, simply rotate the bolt in the opposite direction, so that the bolt thread pushes the threaded sleeve 2 to move in the opposite direction in the guide groove 6, allowing the threaded sleeve 2 to return to its original position. Thus, after the bolt fastener and nut plate are disassembled, the threaded sleeve 2 can still be reused, which can effectively reduce the use cost of the nut plate and improve the practicality of the nut plate.

[0034] In a further preferred embodiment of this utility model, such as Figure 2 - Figure 4 As shown, the bottom diameter of the threaded sleeve 2 is the same as the bottom opening diameter of the guide hole 6, and the depth of the guide hole 6 is greater than the length of the threaded sleeve 2.

[0035] An elastic washer 8 is fixedly connected between the top of the threaded sleeve 2 and the guide hole 6. The inner wall of the elastic washer 8 is smaller than the major diameter of the internal thread of the threaded sleeve 2.

[0036] The inner wall of the guide hole 6 is symmetrically provided with two protrusions forming limiting blocks 9, and the outer wall of the threaded sleeve 2 is provided with a sliding groove 10 that is slidably connected to the limiting blocks 9.

[0037] In this embodiment, because the threaded sleeve 2 is slidably disposed within the guide hole 6, it rotates along with the bolt tightening direction when connected to the bolt, which affects the tightening of the bolt fastener. Therefore, observation is necessary. Figure 2 It can be seen that two limiting blocks 9 are symmetrically arranged in the guide hole 6, and a sliding groove 10 that slides and connects with the limiting blocks 9 is opened on the outer wall of the threaded sleeve 2. This allows the threaded sleeve 2 to maintain the normal sliding deformation clamping effect of the bolt while not rotating with the bolt rotation direction, which can effectively ensure the installation efficiency of the bolt fastener.

[0038] Since the threaded sleeve 2 needs to undergo compressive deformation within the guide hole 6 to clamp the bolt, therefore, observation is necessary. Figure 4 It can be seen that by making the bottom diameter of the threaded sleeve 2 the same as the bottom opening diameter of the guide hole 6, and making the depth of the guide hole 6 greater than the length of the threaded sleeve 2, the threaded sleeve 2 will be deformed by the pressure of the guide hole 6 when it is pulled upward by the tightening of the bolt, which can effectively ensure the fastening effect of the threaded sleeve 2.

[0039] Because the high-frequency vibrations generated during the operation of the mechanical device are continuously applied to the bolt, even when the bolt is clamped by the threaded sleeve 2, there is still a risk of loosening during prolonged use. Therefore, observation is necessary. Figure 2 and Figure 3 It can be observed that placing an elastic washer 8 between the top of the threaded sleeve 2 and the guide hole 6 can block the transmission of vibration, effectively reducing the stress on the threaded sleeve 2 and the bolt, thereby improving the tightening effect of the bolt fastener. Furthermore, by making the inner diameter of the elastic washer 8 smaller than the major diameter of the internal thread of the threaded sleeve 2, the bolt can compress the elastic washer 8 during installation, ensuring a tight fit between the bolt and the elastic washer 8, further improving the vibration resistance of the bolt fastener during use.

[0040] In a further preferred embodiment of this utility model, such as Figure 1 As shown, a circular groove 11 is provided at the top of the substrate 1 at the circular hole 4, and a buffer washer 12 is fixedly connected in the circular groove 11.

[0041] In this embodiment, by providing a circular groove 11 at the circular hole 4 on the top of the substrate 1, and fixing a buffer washer 12 inside the circular groove 11, the buffer washer 12 can provide flexible support for the bolt, avoid hard contact between the bolt and the nut plate and the vibration force is transmitted to the bolt, and further block the transmission of vibration, thereby further improving the stability performance of the bolt fastener after installation.

[0042] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A fall-preventing nut plate, characterized by, The utility model provides a kind of fixing device of base plate, including substrate (1), the bottom center of substrate (1) is fixedly connected with fixed block (3), the bottom of fixed block (3) is equipped with the round hole (4) for installing bolt, the top of round hole (4) extends upwards, and it is passed through substrate (1); Threaded sleeve (2) is slidably arranged in the round hole (4), and the inner hole wall of the threaded sleeve (2) is provided with internal threads for threadedly connecting with the bolt; The diameter of the outer peripheral wall of the threaded sleeve (2) gradually increases from top to bottom, so that the outer peripheral wall of the threaded sleeve (2) forms an inclined surface (5), the bottom of the round hole (4) is provided with a guide hole (6), and the inner wall of the guide hole (6) is in close contact with the inclined surface (5) of the threaded sleeve (2); A plurality of square grooves (7) are arranged in the bottom of the threaded sleeve (2) in an annular array.

2. The anti-drop nut plate according to claim 1, wherein, The bottom diameter of the threaded sleeve (2) is the same as the bottom opening diameter of the guide hole (6), and the depth of the guide hole (6) is greater than the length of the threaded sleeve (2).

3. A nut plate according to claim 2, wherein, A spring washer (8) is fixedly connected between the top of the threaded sleeve (2) and the guide hole (6), and the inner hole wall of the spring washer (8) is smaller than the major diameter of the internal threads of the threaded sleeve (2).

4. The anti-drop nut plate according to claim 3, wherein, The inner wall of the guide hole (6) is symmetrically provided with two protrusions forming a limiting block (9), and the outer wall of the threaded sleeve (2) is provided with a sliding groove (10) slidably connected with the limiting block (9).

5. The anti-drop nut plate according to claim 1, wherein, A circular groove (11) is formed in the top of the substrate (1) at the round hole (4), and a buffer washer (12) is fixedly connected in the circular groove (11).

Images