Anti-loosening threaded fastener

Abstract

The utility model relates to the field of connecting pieces, and discloses an anti-loosening threaded fastener which comprises a screw rod and a nut, the outer wall of the screw rod is in threaded connection with the inner wall of the nut, a fastening assembly is arranged inside the nut and outside the screw rod, the fastening assembly comprises an installation groove, the installation groove is formed in the inner side of the nut, and the installation groove is in threaded connection with the nut. A clamping block is slidably connected to the inner wall of the mounting groove, a reset assembly is arranged in the position, located on the outer side of the mounting groove, of the nut and comprises a moving groove, and the moving groove is formed in the inner wall, located on the outer side of the mounting groove, of the nut. According to the nut, through the arrangement of the mounting groove, the clamping block, the first elastic piece and the clamping hole, when equipment is fixed through the nut, the clamping block can be driven by the inclined face to enable a worker to normally rotate the nut, when the nut is loosened, the nut cannot reversely rotate and reset, and it is guaranteed that the nut is not prone to being loosened and separated from a screw rod after vibration occurs.

Description

Technical Field

[0001] The utility model relates to the field of connecting pieces, in particular to an anti-loosening threaded fastener. Background Art

[0002] Threaded fasteners are mechanical parts with internal or external threads, usually used as fasteners to facilitate the combination of multiple components. They are widely used in various mechanical equipment and are one of the important components to ensure the reliability of mechanical systems.

[0003] At present, in the manufacturing process of transportation vehicles such as automobiles and airplanes, it is necessary to consider that these devices will experience continuous vibration and impact during operation, so it is often necessary to use anti-loosening threaded fasteners to fix their internal key components. At present, when preventing the threaded fasteners from loosening, the friction force is usually increased, so that the friction force between the threaded fasteners and their external fixings is larger, so as to prevent the threaded fasteners from separating from their external fixings.

[0004] However, in actual use, although this method can alleviate the degree of falling off of threaded fasteners to a certain extent, when the vibration amplitude is large, it may still cause the fixing parts outside the threaded fasteners to produce a small angle deflection. When the equipment is used for too long and the accumulated small deflections are too much, it may cause it to loosen to a large extent. In addition, due to the large friction force, it may cause it to rub against the outer wall of the screw during vibration, thereby causing the inside of the fixing parts outside the threaded fasteners and the outside of the threaded fasteners to be damaged due to friction, affecting the use of the equipment. Therefore, an anti-loosening threaded fastener is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an anti-loosening threaded fastener, aiming to improve the problem in the prior art that the threaded fastener may become loose when the vibration amplitude is large and the accumulation time is long.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a threaded fastener to prevent loosening, comprising a screw and a nut, the outer wall of the screw being threadedly connected to the inner wall of the nut, the interior of the nut and the exterior of the screw being jointly provided with a fastening assembly, the fastening assembly comprising an installation groove, the installation groove being opened on the inner side of the nut, the inner wall of the installation groove being slidably connected with a clamping block, the interior of the nut located on the outer side of the installation groove being provided with a reset assembly, the reset assembly comprising a movable groove, the movable groove being opened on the inner wall of the nut located on the outer side of the installation groove, the inner wall of the movable groove being slidably connected with a control ring, the inner wall of the control ring being fixedly connected with a pull rope, the end of the pull rope away from the control ring being fixedly connected to the end of the clamping block away from the screw.

[0007] As a further description of the above technical solution:

[0008] One end of the clamping block away from the screw rod is elastically connected to the inner wall of the mounting groove via an elastic member, and a clamping hole is provided on the outer wall of the screw rod.

[0009] As a further description of the above technical solution:

[0010] The inner wall of the control ring is penetrated and slidably connected with an insertion rod, the outer wall of the nut is provided with a sliding groove, the inner wall of the nut is provided with a plug hole, and the bottom end of the control ring is elastically connected to the inner wall of the movable groove through elastic member 2.

[0011] As a further description of the above technical solution:

[0012] The material of one end of the insert rod close to the screw rod is set to be a magnet, and the material of the nut close to the periphery of the insert hole is set to be iron with anti-rust paint on the surface.

[0013] As a further description of the above technical solution:

[0014] The number of the clamping holes is set to be multiple, and the multiple clamping holes are arranged in a spiral array.

[0015] As a further description of the above technical solution:

[0016] The number of the installation slots, the clamping blocks and the clamping holes is set to be multiple, and the multiple installation slots, the clamping blocks and the clamping holes are in a spiral array, and the top view of the multiple clamping blocks presents a circular array.

[0017] As a further description of the above technical solution:

[0018] The shape of the block is the remaining shape after cutting two triangular prisms from a cuboid, the size of the block matches the size of the hole, and the number of holes contained in the length of the outer surface of the screw corresponding to the length of the line between all the blocks is one less than the total number of blocks.

[0019] As a further description of the above technical solution:

[0020] The length of the insertion rod is longer than the distance between the end of the insertion hole closest to the screw rod and the outer wall of the nut, and an annular groove is formed on the outer wall of the insertion rod outside the nut.

[0021] The utility model has the following beneficial effects:

[0022] 1. In the utility model, by setting the mounting groove, the clamping block, the elastic member and the clamping hole, when the device is fixed by the nut, the clamping block can enable the staff to rotate the nut normally under the drive of the inclined surface, and when the nut is loose, the nut cannot be reversely rotated and reset, so that the nut is not easy to loosen and separate from the screw after vibration occurs.

[0023] 2. In the utility model, by setting the movable groove, control ring, pull rope, plug rod, slide groove, plug hole and elastic member, when the staff needs to remove the fixed equipment, the control ring can be used to drive the pull rope to pull the card block, so that the card block leaves the card hole, making it convenient for the staff to remove the separation screw and nut, thereby ensuring the convenience of removing the equipment and the effect that the fastener can be reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the overall structure of the utility model;

[0025] Figure 2 It is a three-dimensional structural schematic diagram of the nut in the utility model;

[0026] Figure 3 It is a schematic cross-sectional view of the three-dimensional structure of the nut in the utility model;

[0027] Figure 4 For the utility model Figure 3 A magnified schematic diagram of the three-dimensional structure of part A;

[0028] Figure 5 For the utility model Figure 3 A magnified schematic diagram of the three-dimensional structure of part B;

[0029] Figure 6 It is a three-dimensional structural schematic diagram of the clamping block, the elastic member 1 and the pull rope in the utility model.

[0030] Legend:

[0031] 1. Screw; 2. Nut; 3. Fastening assembly; 4. Reset assembly; 31. Mounting slot; 32. Block; 33. Elastic part 1; 34. Clamping hole; 41. Moving slot; 42. Control ring; 43. Pull rope; 44. Insert rod; 45. Slide slot; 46. Plug hole; 47. Elastic part 2. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1 - Figure 3 The utility model provides an embodiment: an anti-loosening threaded fastener, including a screw 1 and a nut 2, the outer wall of the screw 1 is threadedly connected to the inner wall of the nut 2, the top view of the nut 2 is a hexagon, and a threaded hole matching the shape of the screw 1 is opened in the middle of the nut 2, and the nut 2 is rotated clockwise to achieve tightening.

[0034] Reference Figure 3 , Figure 4 and Figure 6 The interior of the nut 2 and the exterior of the screw 1 are jointly provided with a fastening component 3, and the fastening component 3 includes a mounting groove 31, the mounting groove 31 is in the shape of a rectangular parallelepiped, and the inclination angle of the mounting groove 31 matches the thread angle of the screw 1, the mounting groove 31 is opened on the inner side of the nut 2, and the inner wall of the mounting groove 31 is slidably connected with a clamping block 32, and the end of the clamping block 32 away from the screw 1 is elastically connected to the inner wall of the mounting groove 31 through an elastic member 33, one end of the elastic member 33 is fixedly connected to the end of the clamping block 32 away from the screw 1, and the other end of the elastic member 33 is fixedly connected to the inner wall of the mounting groove 31, and the elastic member 33 is a spring, a spring, a metal with shape memory properties, or other elastic materials with a smaller volume.

[0035] Reference Figure 1 , Figure 4 and Figure 6The outer wall of the screw 1 is provided with a clamping hole 34. The shape of the clamping block 32 is the remaining shape after two triangular prisms are cut off from a rectangular parallelepiped. The two triangular prisms are arranged at the lower side of the clamping block 32 close to the end of the screw 1. Since the mounting groove 31 is installed at an angle, and the shape of the clamping block 32 matches the shape of the mounting groove 31, the clamping block 32 is also installed at an angle. Therefore, the surface of the clamping block 32 on the lower side of the thread is slightly tilted downward. The size of the clamping block 32 matches the size of the clamping hole 34. The number of the clamping holes 34 is set to be multiple, and the multiple clamping holes 34 are arranged in a spiral array. The clamping hole 34 is located in the middle of the inner area of ​​the screw 1. The mounting groove 31 is installed at an angle. The number of the blocks 32 and the holes 34 is set to be multiple, and the multiple installation grooves 31, the blocks 32 and the holes 34 are in a spiral array, the top view of the multiple blocks 32 presents a circular array, and the number of holes 34 included in the length of the outer surface of the screw rod 1 corresponding to the length of the line between all the blocks 32 is one less than the total number of the blocks 32. By comparing the number of the blocks 32 and the holes 34, it is ensured that when the nut 2 rotates a small distance, there will be a hole 34 that is exactly in a fitting position with one of the blocks 32, thereby preventing the nut 2 and the screw rod 1 from being poorly fixed due to the distance between the blocks 32 and the holes 34.

[0036] Reference Figure 1 , Figure 3 and Figure 5 A reset component 4 is arranged inside the nut 2 outside the installation groove 31, and the reset component 4 includes a moving groove 41, and the moving groove 41 is opened on the inner wall of the nut 2 outside the installation groove 31. The shape of the moving groove 41 is annular, and the inner wall of the moving groove 41 is slidably connected with a control ring 42, and the top height of the control ring 42 is higher than the top height of the nut 2. A pull rope 43 is fixedly connected to the inner wall of the control ring 42, and the pull rope 43 is inelastic. The end of the pull rope 43 away from the control ring 42 is fixedly connected to the end of the block 32 away from the screw 1. The inner wall of the control ring 42 passes through and is slidably connected with a plug rod 44. A slide groove 45 is opened on the outer wall of the nut 2. The width of the slide groove 45 matches the diameter length of the plug rod 44. A plug hole 46 is opened on the inner wall of the nut 2. The length of the plug rod 44 is longer than the distance between the end of the socket 46 closest to the screw rod 1 and the outer wall of the nut 2. The outer wall of the plug rod 44 outside the nut 2 is provided with an annular groove. The setting of the annular groove ensures that it is easier for the staff to pull out the plug rod 44. The material of the end of the plug rod 44 close to the screw rod 1 is set to a magnet, and the material of the nut 2 close to the socket 46 is set to iron with anti-rust paint on the surface. The material setting of the plug rod 44 ensures that during vibration, the plug rod 44 is not easy to detach from the inside of the socket 46. The bottom end of the control ring 42 is elastically connected to the inner wall of the movable groove 41 by an elastic member 47. The elastic member 47 is a spring, and the elastic force of the elastic member 47 is greater than the sum of the elastic forces of all the elastic members 33.

[0037] Working principle: When the worker turns the nut 2 to fix the object, the worker Figure 1 The top view direction of the figure shown is taken as the standard, and the nut 2 is rotated clockwise so that the nut 2 moves downward during the rotation process, thereby achieving the effect of fixing the object at the top of the joint between the bottom end of the nut 2 and the bottom end of the screw rod 1.

[0038] During the rotation of the nut 2 , when the block 32 in the block hole 34 rotates driven by the nut 2 , its inclined surface is subjected to force. Therefore, after being subjected to force, the block 32 can move to the inside of the installation groove 31 , so the block 32 will not affect the rotation of the nut 2 .

[0039] When the fixing is completed, if the nut 2 rotates upward or counterclockwise under the action of vibration, the straight surface of the clamping block 32 contacts the inner wall of the clamping hole 34, so the clamping block 32 cannot leave the clamping hole 34 at this time, so the nut 2 cannot rotate counterclockwise, thereby achieving the effect of preventing loosening.

[0040] At the same time, when the nut 2 just contacts the screw rod 1, since the two bottom surfaces of the block 32 close to one end of the screw rod 1 are provided with inclined surfaces, the block 32 can easily enter the installation groove 31 under the control of the inclined surfaces, so it will not affect the connection between the nut 2 and the screw rod 1.

[0041] When the staff needs to remove the nut 2, the staff first pulls out the insertion rod 44. When the insertion rod 44 leaves the insertion hole 46, the control ring 42 is not restricted. Therefore, the control ring 42 moves upward under the drive of the elastic member 47, so that the control ring 42 drives the pull rope 43 to move upward during the upward movement, so that the pull rope 43 pulls the block 32, so that the block 32 leaves the hole 34, thereby releasing the fixing effect of the nut 2 and the screw 1. At this time, the staff can easily rotate the nut 2 through the hexagonal surface of the nut 2 with the help of tools to achieve the effect of separating the nut 2 from the screw 1.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A threaded fastener for preventing loosening, comprising a screw (1) and a nut (2), characterized in that: The outer wall of the screw rod (1) is threadedly connected to the inner wall of the nut (2); the interior of the nut (2) and the exterior of the screw rod (1) are jointly provided with a fastening assembly (3); the fastening assembly (3) comprises a mounting groove (31); the mounting groove (31) is arranged on the inner side of the nut (2); the inner wall of the mounting groove (31) is slidably connected to a clamping block (32); the interior of the nut (2) outside the mounting groove (31) is provided with a reset assembly (4); the reset assembly (4) comprises a moving groove (41); the moving groove (41) is arranged on the inner wall of the nut (2) outside the mounting groove (31); the inner wall of the moving groove (41) is slidably connected to a control ring (42); the inner wall of the control ring (42) is fixedly connected to a pull rope (43); the end of the pull rope (43) away from the control ring (42) is fixedly connected to the end of the clamping block (32) away from the screw rod (1).

2. The anti-loosening threaded fastener according to claim 1, characterized in that: One end of the clamping block (32) away from the screw rod (1) is elastically connected to the inner wall of the mounting groove (31) via an elastic member (33), and a clamping hole (34) is provided on the outer wall of the screw rod (1).

3. The anti-loosening threaded fastener according to claim 1, characterized in that: The inner wall of the control ring (42) is penetrated by an insertion rod (44) which is slidably connected thereto, the outer wall of the nut (2) is provided with a sliding groove (45), the inner wall of the nut (2) is provided with an insertion hole (46), and the bottom end of the control ring (42) is elastically connected to the inner wall of the movable groove (41) via a second elastic member (47).

4. The anti-loosening threaded fastener according to claim 3, characterized in that: The material of one end of the insertion rod (44) close to the screw rod (1) is set to be a magnet, and the material of the nut (2) close to the insertion hole (46) is set to be iron with anti-rust paint on the surface.

5. The anti-loosening threaded fastener according to claim 2, characterized in that: The number of the clamping holes (34) is set to be multiple, and the multiple clamping holes (34) are arranged in a spiral array.

6. The anti-loosening threaded fastener according to claim 2, characterized in that: The number of the mounting grooves (31), the clamping blocks (32) and the clamping holes (34) is set to be multiple, and the multiple mounting grooves (31), the clamping blocks (32) and the clamping holes (34) are arranged in a spiral array, and the top view of the multiple clamping blocks (32) presents a circular array.

7. The anti-loosening threaded fastener according to claim 2, characterized in that: The shape of the clamping block (32) is the shape remaining after two triangular prisms are cut off from a rectangular parallelepiped, the size of the clamping block (32) matches the size of the clamping hole (34), and the number of the clamping holes (34) included in the length of the outer surface of the screw rod (1) corresponding to the length of the connecting line between all the clamping blocks (32) is one less than the total number of the clamping blocks (32).

8. The anti-loosening threaded fastener according to claim 3, characterized in that: The length of the insertion rod (44) is longer than the distance between the end of the insertion hole (46) closest to the screw rod (1) and the outer wall of the nut (2), and an annular groove is formed on the outer wall of the insertion rod (44) outside the nut (2).

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