Locking nut and locking screw assembly

Abstract

To provide a stable and reliable locking nut and a locking screw assembly at low cost.SOLUTION: Provided is a locking nut 1 comprising: a body having a female screw part on an inner surface; a through-hole 5 leading from a seating surface of the body to the female screw part; a filling 2 having an irregular shape filled in the through-hole 5; and a movable piece 3 whose tip is exposed from an opening on the seating surface side of the body of the through-hole 5, and which is disposed in the through-hole 5 in a storable manner. Provided is also a locking screw assembly composed of the nut 1 and a bolt 6. The female screw part of the body may be provided with storage grooves communicating with the through-hole 5, the number of the storage grooves shall be at least two, and the storage grooves having a different size from one another, may be distributed clockwise along a screw thread of the female screw part.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to the technical field of mechanical parts, and more particularly to a locking nut and locking screw assembly. [Background technology]

[0002] Nuts are called the "glue" between mechanical parts, and are screwed onto the male threads of bolts to fasten workpieces with the aid of biasing force. However, in actual use, the nut is prone to loosening along the threads of the bolt due to vibrations of the workpieces or external forces, which can cause the fastened workpieces to loosen or come off. For example, new energy vehicles, railways, steel bridges, oil drilling platforms, etc. have high requirements for safety performance, and therefore require stable and reliable anti-loosening nuts and anti-loosening screw assemblies.

[0003] Conventional anti-loosening nuts, such as the one invented by Hardlock Industrial Co., Ltd. in the 1970s, are divided into a female nut and a male nut. When the eccentric male nut at the bottom is attached to the thread together with the female nut, the protruding part of the male nut firmly engages with the inner wall of the female nut and the male nut and female nut press against each other, canceling out mechanical vibrations.

[0004] However, the locking nuts require extremely high toughness and hardness to avoid damage caused by metal fatigue. In addition, the accuracy required for the eccentric angle of the male nut is high, and the manufacturing equipment for the nut must achieve extremely high processing accuracy. For these reasons, there is a problem that the manufacturing cost of the locking nuts is high. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention has been made to solve the above problems, and has an object to provide a stable and reliable locking nut and locking screw assembly at low cost. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the present invention provides an anti-loosening nut comprising a body having a female threaded portion on its inner surface, a through hole leading from the seating surface of the body to the female threaded portion, a filler having an irregular shape that is filled into the through hole, and a movable piece whose tip is exposed from an opening of the through hole on the seating surface side of the body and is arranged so that it can be accommodated in the through hole.

[0007] In the locking nut, a receiving groove that communicates with the through hole may be provided in the female threaded portion of the body.

[0008] The number of the accommodation grooves may be at least two, the accommodation grooves being formed to have different sizes from each other, and the accommodation grooves may be distributed clockwise along the threads of the female thread portion.

[0009] Furthermore, a sealing film may be provided on the female threaded portion side of the through hole, and the sealing film may be formed of lubricating paper or aluminum foil.

[0010] The filler may be made of a wear-resistant material, and may be stainless steel scrap.

[0011] A plurality of the through holes may be provided, and the plurality of through holes may be disposed at equal intervals on the seat surface of the main body.

[0012] The through hole may be configured to have a straight hole portion and an arc-shaped hole portion from the seat surface of the main body toward the female thread portion, the movable piece may be movably disposed within the straight hole portion of the through hole, and the remaining space within the through hole where the movable piece does not exist may be filled with the filler.

[0013] Any of the above-described locking nuts and a bolt that can be screwed into the locking nut can constitute a locking screw assembly. Effect of the Invention

[0014] According to the locking nut of the present invention, when the nut is screwed onto a bolt, the end face of the nut abuts against another member, the movable piece is pressed and forced into the through hole, and the irregularly shaped filler in the through hole is forced into the screwing point of the female threaded portion, thereby preventing the problems of the nut loosening and slipping. In addition, since the nut does not require the use of a special material and does not require high machining precision, a stable and reliable locking nut and locking screw assembly can be provided at low cost. [Brief description of the drawings]

[0015] [Figure 1] 1 is a schematic diagram showing an embodiment of a locking screw assembly according to the present invention; [Diagram 2] 1 is a schematic diagram showing a movable piece and a filler portion constituting one embodiment of the anti-loosening nut of the present invention. FIG. [Diagram 3] 3 is a schematic view of a through hole portion of the locking nut of FIG. 2. [Figure 4] 3 is a schematic view showing a bearing surface of the locking nut in FIG. 2. [Diagram 5] 1A to 1C are diagrams illustrating the operating principle of the locking screw assembly of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] In order to make the above-mentioned objectives, features and advantages of the present invention more clearly comprehensible, specific embodiments of the present invention will be clearly and completely described in conjunction with the drawings. The specific details described below are only some embodiments of the present invention, and the present invention can be realized in many embodiments different from other embodiments described in this specification. Based on the embodiments in the present invention, all other embodiments obtained will fall within the protection scope of the present invention unless those skilled in the art make creative efforts.

[0017] In the following description, when a component is described as being "fixed" to another component, it may be directly fixed to the other component or may be fixed via an intervening member. Furthermore, when a component is described as being "connected" to another component, it may be directly connected to the other component or may be indirectly connected via an intervening member. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not indicate the only embodiment.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which the present invention pertains. The terms used in the present specification are for the purpose of describing particular embodiments only and are not intended to limit the present invention.

[0019] 1 to 5 show an embodiment of a locking nut (hereinafter abbreviated as "nut") according to the present invention. In this nut 1, a through hole 5 that is connected to a female thread on the inner surface of the nut 1 is opened on the seating surface, an irregularly shaped filler 2 is filled in the through hole 5, and a movable piece 3 is provided with an exposed tip on the seating surface side of the through hole 5. When the nut 1 is rotated and fastened to a bolt 6, the movable piece 3 is pressed and forced into the through hole 5, and the filler 2 in the through hole 5 is forced into the female thread on the inner surface side of the nut 1. In this embodiment, the filler 2 is made of a wear-resistant material.

[0020] This nut 1 has a through hole 5 formed therein in which a filler 2 is filled, and when the nut 1 is tightened onto a bolt 6, the seating surface of the nut 1 abuts against another component, forcing the movable piece 3 into the through hole 5 and forcing the filler 2 into the female threaded portion on the inner surface of the nut 1. The irregularly shaped, wear-resistant filler 2 prevents the nut and bolt 6 from rotating relative to each other, thereby avoiding problems with loosening or slipping of the nut 1.

[0021] This nut 1 does not require the use of special materials, does not require high machining precision, and is low-cost, stable and reliable.

[0022] In this embodiment, an accommodation groove (not shown) may be provided on the inner wall of the nut 1, and the accommodation groove and the through hole 5 may be electrically connected to push the filler 2 into the accommodation groove from the through hole 5. The number of accommodation grooves may be one or more, and when the number of accommodation grooves is at least two or more, the sizes of the accommodation grooves may be different from each other and the accommodation grooves may be arranged clockwise along the thread of the female thread portion on the inner surface of the nut 1. For example, three accommodation grooves may be arranged clockwise along the thread, and the sizes of the accommodation grooves may be successively smaller.

[0023] The accommodating groove allows the filler 2 to be pushed out of the through hole 5 and into the female threaded portion, and the different accommodating grooves are connected by the female thread. As the nut 1 rotates, the filler 2 is carried into the different accommodating grooves and the screw fastening points, increasing the distribution area of ​​the filler 2 and improving the anti-loosening effect.

[0024] In addition to this embodiment, a pressure-resistant sealing film 7 is provided at the opening of the through hole 5 on the female thread side so that the filler 2 before use of the nut 1 does not leak from the through hole 5. When the sealing film 7 seals the filler 2 in the through hole 5 and the movable piece 3 moves into the through hole 5, the filler 2 crushes the sealing film 7 and the filler 2 enters the female thread.

[0025] Although lubricating paper or aluminum foil can be used as the sealing film 7, other materials that are weak against extrusion can also be used, and the material is not limited as long as it can achieve the above-mentioned functions.

[0026] In this embodiment, the filler 2 includes metal materials that are not easily rusted, such as irregularly shaped stainless steel scraps, tungsten scraps, etc. Also, the filler 2 may be other robust wear-resistant materials, but is not limited thereto.

[0027] By providing a plurality of through holes 5 and arranging the plurality of through holes 5 at equal intervals at different positions on the nut 1, the effect of preventing the nut 1 from loosening can be further improved. In this embodiment, as shown in Fig. 4, six sets of through holes 5 are provided equally distributed on the seating surface of the nut 1. The number of through holes 5 may be one or another number, and is not limited thereto in this embodiment.

[0028] 3, the through hole 5 has a straight hole portion 51 and an arc-shaped hole portion 52, which are connected in sequence from the seat surface toward the inner surface side. The straight hole portion 51 is a cylindrical hole, and gives the movable piece 3 a linear movement locus.

[0029] The trajectory of the arc-shaped hole portion 52 of the through hole 5 is arc-shaped in order to smoothly guide the filler 2 to the outlet of the female thread portion. The filler 2 moves more smoothly through the arc than through a narrow hole with bent corners, and does not get caught in the through hole 5. The movable piece 3 is installed in the straight hole portion 51 so as to be movable in the axial direction, and the remaining space in the through hole 5 is filled with the filler 2. The shape of the through hole 5 may be other and is not limited to this embodiment.

[0030] On the other hand, as described with reference to Figures 1 and 5, the anti-loosening screw assembly of the present invention comprises the nut 1 and bolt 6 as described above, and the nut 1 can be screwed onto the bolt 6, forming a screw engagement that prevents loosening.

[0031] By filling the gap between the nut 1 and the threads of the bolt 6 with high-strength, irregularly shaped metal filler 2, it is possible to increase the frictional force and prevent slippage. One or more through holes 5 are drilled in the nut 1, into which irregular metal filler that engages with the threads of the female thread of the nut 1 is filled, and a movable piece 3 is installed on the seat of the nut 1.

[0032] When the nut 1 is screwed in and the seating surface hits the fixing device, the force acting on the nut 1 through the fixing device moves the movable piece 3, and the irregularly shaped metal scraps are pushed into the inside of the nut 1, preventing the nut 1 from loosening or slipping. This nut 1 does not require the use of special materials, does not require high processing precision, is low cost, stable and reliable, and is favorable for widespread use.

[0033] The technical features of the above embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features of the above embodiments have been described. However, as long as there is no contradiction in the combination of these technical features, it should be understood that they are within the technical scope described in this specification.

[0034] The above embodiments merely show some embodiments of the present invention, and the description is more specific and detailed, but this does not limit the patent scope of the invention. It should be noted that those skilled in the art can make some modifications, substitutions and improvements without departing from the spirit of the present invention, which should be included in the scope of protection of the present invention. Therefore, the scope of protection of the patent of the present invention shall be subject to the scope of the claims. [Explanation of symbols]

[0035] 1 Locking nut 2 filling 3 Movable piece 5 Through hole 51 Straight hole 52 Arc-shaped hole 6 Volts 7 Sealing membrane

Claims

1. A main body having a female thread on an inner surface thereof; a through hole that communicates with the female thread portion from the seat surface of the main body; a filler having an irregular shape that is filled into the through hole; a movable piece whose tip is exposed from the opening of the through hole on the seat side of the body and which is receivable in the through hole.

2. 2. The locking nut according to claim 1, wherein the female threaded portion of the body is provided with an accommodating groove that communicates with the through hole.

3. 3. The locking nut according to claim 2, wherein the number of said receiving grooves is at least two, each of said receiving grooves has a different size from the other, and is distributed clockwise along the threads of said female thread portion.

4. 4. The anti-loosening nut according to claim 1, further comprising a sealing film on the female threaded portion side of the through hole.

5. 5. The anti-loosening nut according to claim 4, wherein the sealing film is made of lubricating paper or aluminum foil.

6. 4. The locking nut according to claim 1, 2 or 3, characterized in that the filler is made of a wear-resistant material.

7. 7. The locking nut according to claim 6, wherein the filler is made of stainless steel scraps.

8. 2. The anti-loosening nut according to claim 1, further comprising a plurality of the through holes, the plurality of through holes being disposed at equal intervals on the seat surface of the body.

9. 2. The anti-loosening nut according to claim 1, characterized in that the through hole has a straight hole portion and an arc-shaped hole portion from the seat surface of the body toward the female thread portion, the movable piece is movably disposed within the straight hole portion of the through hole, and the remaining space within the through hole where the movable piece does not exist is filled with the filler.

10. 10. A locking screw assembly comprising the locking nut according to claim 1 and a bolt that can be screwed onto the locking nut.

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