Nut self-locking structure and workpiece

Abstract

The utility model discloses a nut self-locking structure and relates to the field of locknuts. The nut self-locking structure comprises a screw, at least one fixing pin and a nut sleeve arranged on the screw in a sleeving mode through threads, one end of the nut sleeve is provided with a hollow circular-truncated-cone-shaped closing-in sleeve, the outer diameter of the closing-in sleeve is gradually decreased away from the nut sleeve, and the outer wall of the nut sleeve is provided with external threads. Guide grooves in one-to-one correspondence with the fixing pins are formed in the outer wall of the nut sleeve and extend in the axial direction of the nut sleeve, and the fixing pins are clamped in the corresponding guide grooves. According to the nut self-locking structure and the workpiece, after the nut sleeve is connected to the screw through the thread, the nut sleeve is connected to the mounting base through the thread, and the fixing pin is inserted into the guide groove in the outer wall of the nut sleeve to be pressed between the nut sleeve and the mounting base so that permanent and firm connection between the nut sleeve and the mounting base can be kept; and the self-locking performance of the nut in a mechanical vibration environment is effectively improved.

Description

Technical Field

[0001] The present application relates to the field of anti-loosening nuts, and in particular to a nut self-locking structure and a workpiece. Background Art

[0002] Nuts are a common fastening mechanism used for various workpieces. They offer advantages such as stable connections, ease of manufacture, and low cost. However, prolonged use in vibration and shock environments can damage and loosen the threads, impacting their longevity.

[0003] Existing methods for preventing nuts from loosening generally involve punching holes in the nuts to destroy the thread structure or using adhesive to connect them for self-locking reinforcement. However, these methods cannot guarantee the stable connection of the nut structure under long-term vibration environments. Utility Model Content

[0004] The purpose of this application is to provide a nut self-locking structure and a workpiece, which can effectively improve the self-locking performance of the nut under a mechanical vibration environment.

[0005] This application is implemented as follows:

[0006] The present application provides a nut self-locking structure, which includes a screw, at least one fixing pin and a nut sleeve threadedly mounted on the screw. A hollow conical closing sleeve is provided at one end of the nut sleeve. The outer diameter of the closing sleeve gradually decreases as it moves away from the nut sleeve. The outer wall of the nut sleeve is provided with an external thread. The outer wall of the nut sleeve is provided with a guide groove corresponding to the fixing pin one by one. The guide groove extends along the axial direction of the nut sleeve, and the fixing pin is clamped in the corresponding guide groove.

[0007] In some optional embodiments, a locking sleeve is further included which is threadedly mounted on the screw, and a pressing sleeve is provided at one end of the locking sleeve which is mounted on the outside of the closing sleeve. The inner wall of the pressing sleeve gradually increases as it approaches the nut sleeve, and when the locking sleeve moves axially along the screw, the inner wall of the pressing sleeve presses against the outer wall of the closing sleeve.

[0008] In some optional embodiments, a buffer pad is further included which is sleeved on the outer wall of the closing sleeve.

[0009] In some optional embodiments, the outer wall of the locking sleeve is provided with an external thread.

[0010] In some optional embodiments, the outer wall of the locking sleeve is provided with a limiting groove corresponding to the guide groove one by one, the limiting groove extends along the axial direction of the locking sleeve, and the end of the fixing pin away from the nut sleeve is clamped in the corresponding limiting groove.

[0011] In some optional embodiments, an end surface of the nut sleeve away from the closing sleeve is recessed to form at least one groove.

[0012] In some optional embodiments, the angle between the generatrix of the outer wall of the closing sleeve and the axis is 10-12 degrees.

[0013] The present application also provides a workpiece, which includes the above-mentioned nut self-locking structure and a mounting seat that is threadedly sleeved on the nut sleeve.

[0014] The beneficial effects of the present application are as follows: the nut self-locking structure provided by the present application includes a screw, at least one fixing pin and a nut sleeve that is threadedly sleeved on the screw, a hollow truncated cone-shaped closing sleeve is provided at one end of the nut sleeve, the outer diameter of the closing sleeve gradually decreases as it moves away from the nut sleeve, the outer wall of the nut sleeve is provided with an external thread, the outer wall of the nut sleeve is provided with a guide groove that corresponds to the fixing pin one by one, the guide groove extends along the axial direction of the nut sleeve, and the fixing pin is clamped in the corresponding guide groove. The nut self-locking structure and workpiece provided by the present application are achieved by threading the nut sleeve to the screw and then threading the nut sleeve to the mounting seat, and inserting the fixing pin into the guide groove on the outer wall of the nut sleeve to press it between the nut sleeve and the mounting seat to maintain a permanent and firm connection between the nut sleeve and the mounting seat, thereby effectively improving the self-locking performance of the nut under mechanical vibration conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A schematic partial cross-sectional view of a nut self-locking structure in a workpiece according to Example 1 of the present application connecting a mounting seat to a connecting piece;

[0017] Figure 2 A schematic diagram of a partial cross-sectional structure of a nut sleeve in a workpiece provided in Example 1 of the present application from a first perspective;

[0018] Figure 3 A schematic structural diagram of a nut sleeve in a workpiece from a second perspective provided in Example 1 of the present application;

[0019] Figure 4 A schematic structural diagram of a fixing pin in a workpiece provided in Example 1 of the present application;

[0020] Figure 5 A schematic partial cross-sectional view of a nut self-locking structure in a workpiece according to Example 2 of the present application connecting a mounting seat to a connecting piece;

[0021] Figure 6A schematic diagram of a partial cross-sectional structure of a locking sleeve in a self-locking structure of a nut in a workpiece provided in Example 2 of the present application, from a first perspective;

[0022] Figure 7 This is a structural schematic diagram from a second perspective of the locking sleeve in the self-locking structure of the nut in the workpiece provided in Example 2 of the present application.

[0023] In the figure: 100, screw; 110, fixing pin; 120, nut; 200, nut sleeve; 210, closing sleeve; 220, guide groove; 230, groove; 300, locking sleeve; 310, pressing sleeve; 320, buffer pad; 330, limiting groove; 400, mounting seat; 410, connecting piece. DETAILED DESCRIPTION

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments in the present application without creative work are within the scope of protection of the present application.

[0026] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0027] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended only to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] Furthermore, terms such as "horizontal," "vertical," and "overhanging" do not necessarily imply that a component must be absolutely horizontal or overhanging, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but rather that it can be slightly tilted.

[0029] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0030] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0031] The following is a further detailed description of the nut self-locking structure and the features and performance of the workpiece of the present application in conjunction with the embodiments.

[0032] Example 1

[0033] like Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, the embodiment of the present application provides a workpiece, which includes a nut self-locking structure and a mounting seat 400 with a threaded hole, the nut self-locking structure is used to connect the mounting seat 400 to the connecting piece 410; the nut self-locking structure includes a screw 100 with a nut 120 at one end, two fixing pins 110 and a nut sleeve 200 threadedly sleeved on the screw 100, the nut sleeve 200 is provided with a hollow frustum-shaped closing sleeve 210 at one end away from the nut 120, the outer diameter of the closing sleeve 210 gradually decreases as it moves away from the nut 120, and the closing sleeve The included angle between the busbar of the outer wall 210 and the axis is 12 degrees; the outer wall of the nut sleeve 200 is provided with an external thread for connecting to the threaded hole of the mounting seat 400, and two guide grooves 220 corresponding to the fixing pins 110 are provided on the outer wall of the nut sleeve 200. The guide grooves 220 extend along the axial direction of the nut sleeve 200, and the two guide grooves 220 are arranged at an angle of 180 degrees along the circumference of the nut sleeve 200. The fixing pin 110 is clamped in the corresponding guide groove 220; the end face of the nut sleeve 200 away from the closing sleeve 210 is recessed to form a groove 230.

[0034] The workpiece provided in the embodiment of the present application is made by passing the screw 100 through the threaded holes on the connecting piece 410 and the mounting seat 400, and threading the nut sleeve 200 on one end of the screw 100 passing through the mounting seat 400, and rotating the nut sleeve 200 so that its outer wall is connected to the inner wall of the mounting seat 400 through a thread, so that the end of the nut sleeve 200 away from the closing sleeve 210 presses against the connecting piece 410, and then using a press to respectively drive two fixing pins 110 into the two guide grooves 220 on the outer wall of the nut sleeve 200, and tightening the connection between the nut sleeve 200 and the mounting seat 400 using the fixing pins 110 to ensure the stable connection between the nut sleeve 200 and the mounting seat 400 to prevent them from loosening under long-term vibration, thereby utilizing the nut self-locking structure to stably connect the mounting seat 400 and the connecting piece 410 into a whole.

[0035] Among them, a hollow frustum-shaped closing sleeve 210 is provided at one end of the nut sleeve 200 away from the nut 120. The outer diameter of the closing sleeve 210 gradually decreases as it moves away from the nut 120. The angle between the busbar of the outer wall of the closing sleeve 210 and the axis is 12 degrees. The closing sleeve 210, whose outer diameter gradually decreases as it moves away from the nut 120, can be used to generate stress on the screw 100 passing through the nut sleeve 200 to prevent loosening; the end face of the nut sleeve 200 away from the closing sleeve 210 is recessed to form a groove 230, which can release the end stress of the nut sleeve 200 to facilitate the screw 100 passing through the nut sleeve 200.

[0036] In other optional embodiments, the number of corresponding guide grooves 220 provided on the fixing pin 110 and the nut sleeve 200 may be one, three, or more than three.

[0037] In other optional embodiments, the number of the grooves 230 formed by the depression of the end surface of the nut sleeve 200 away from the closing sleeve 210 can also be two or more.

[0038] In other optional embodiments, the angle between the generatrix of the outer wall of the closing sleeve 210 and the axis can also be any angle between 10-12 degrees.

[0039] Example 2

[0040] like Figure 5 、 Figure 6 and Figure 7 As shown, the embodiment of the present application also provides a workpiece, which has roughly the same structure as the workpiece provided in Example 1, except that, in this embodiment, it also includes a locking sleeve 300 and a buffer pad 320 sleeved on the outer wall of the closing sleeve 210, the locking sleeve 300 is threadedly sleeved on the end of the screw 100 away from the nut 120, and the end of the locking sleeve 300 close to the closing sleeve 210 is provided with a pressing sleeve 310 sleeved on the outside of the closing sleeve 210, the inner wall of the pressing sleeve 310 gradually increases as it approaches the nut sleeve 200, and when the locking sleeve 300 moves axially along the screw 100, the inner wall of the pressing sleeve 310 presses against the outer wall of the closing sleeve 210, the outer wall of the locking sleeve 300 is provided with a limiting groove 330 corresponding to the guide groove 220, the limiting groove 330 extends along the axial direction of the locking sleeve 300, and the end of the fixing pin 110 away from the nut sleeve 200 is clamped in the corresponding limiting groove 330.

[0041] The workpiece provided by the embodiment of the present application is connected to the locking sleeve 300 by threading at the end of the screw 100 away from the nut 120, and is provided with a pressing sleeve 310 sleeved on the outside of the closing sleeve 210 at the end of the locking sleeve 300 close to the closing sleeve 210. The inner wall of the pressing sleeve 310 gradually increases as it approaches the nut sleeve 200. When the locking sleeve 300 moves axially along the screw 100, the inner wall of the pressing sleeve 310 presses against the outer wall of the closing sleeve 210, and the inner wall of the pressing sleeve 310 can be used to press against the outer wall of the closing sleeve 210 to improve the connection between the nut sleeve 200 and the screw 100. The firmness and stability of the locking sleeve 300 are improved. At the same time, a limiting groove 330 corresponding to the guide groove 220 is provided on the outer wall of the locking sleeve 300. The two ends of the fixing pin 110 are respectively inserted into the guide groove 220 and the limiting groove 330. The fixing pin 110 can be used to connect the nut sleeve 200 and the locking sleeve 300 into a whole to improve the structural strength of the nut self-locking structure, and the fixing pin 110 is used to limit the nut sleeve 200 and the locking sleeve 300 to rotate in the circumferential direction, thereby ensuring the firmness of the connection between the nut sleeve 200 and the locking sleeve 300 and the screw 100, and improving the anti-loosening performance of the nut self-locking structure.

[0042] Among them, a buffer pad 320 is provided on the outer wall of the closing sleeve 210, which can play a good buffering and protective role by setting the buffer pad 320 between the closing sleeve 210 and the pressing sleeve 310, avoiding the squeezing effect of the pressing sleeve 310 to damage the closing sleeve 210, and ensuring that the pressing sleeve 310 is stable and presses the closing sleeve 210 to generate stress on the screw 100 to play an anti-loosening function.

[0043] In other optional embodiments, the outer wall of the locking sleeve 300 can also be provided with an external thread connected to the threaded hole on the inner wall of the mounting seat 400, so that the locking sleeve 300 and the nut sleeve 200 are respectively connected to the inner wall of the mounting seat 400 through threads, thereby effectively improving the connection stability of the nut self-locking structure.

[0044] The embodiments described above are part of the embodiments of the present application, rather than all of the embodiments. The detailed description of the embodiments of the present application is not intended to limit the scope of the present application for protection, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

Claims

1. A nut self-locking structure, characterized in that: It includes a screw, at least one fixing pin and a nut sleeve threadedly mounted on the screw. A hollow frustum-shaped closing sleeve is provided at one end of the nut sleeve. The outer diameter of the closing sleeve gradually decreases as it moves away from the nut sleeve. The outer wall of the nut sleeve is provided with an external thread. The outer wall of the nut sleeve is provided with a guide groove corresponding to the fixing pin one by one. The guide groove extends along the axial direction of the nut sleeve, and the fixing pin is clamped in the corresponding guide groove.

2. The nut self-locking structure according to claim 1, characterized in that: It also includes a locking sleeve that is threaded onto the screw, and one end of the locking sleeve is provided with a pressing sleeve that is sleeved on the outside of the closing sleeve. The inner wall of the pressing sleeve gradually increases as it approaches the nut sleeve, and when the locking sleeve moves axially along the screw, the inner wall of the pressing sleeve presses against the outer wall of the closing sleeve.

3. The nut self-locking structure according to claim 2, characterized in that: It also includes a buffer pad sleeved on the outer wall of the closing sleeve.

4. The nut self-locking structure according to claim 2, characterized in that: The outer wall of the locking sleeve is provided with an external thread.

5. The nut self-locking structure according to claim 2, characterized in that: The outer wall of the locking sleeve is provided with a limiting groove corresponding to the guide groove one by one, and the limiting groove extends along the axial direction of the locking sleeve, and the end of the fixing pin away from the nut sleeve is clamped in the corresponding limiting groove.

6. The nut self-locking structure according to claim 4, characterized in that: An end surface of the nut sleeve away from the closing sleeve is recessed to form at least one groove.

7. The nut self-locking structure according to claim 1, characterized in that: The included angle between the generatrix of the outer wall of the closing sleeve and the axis is 10-12 degrees.

8. A workpiece, characterized in that It comprises a nut self-locking structure as claimed in any one of claims 1 to 7 and a mounting seat which is threadedly sleeved on the nut sleeve.

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