Anti-loosening spring nut

Abstract

The present invention relates to a spring nut for preventing loosening, which is fastened to the lower part of a nut (20) fastened to a bolt (10) to prevent the nut (20) from loosening. The spring nut comprises an internal thread (120) of a spring which is wound around the external thread of the bolt (10) several times and has a lower locking ring (123) and an upper locking ring (121) which protrude radially outward in different directions from the lower end and the upper end, respectively; and an external casing (111) having a box shape in which the internal thread (120) is housed, a bolt insertion hole (111a) through which the bolt (10) is inserted is formed in a bottom plate (111), and a plurality of pressing jaws (114) recessed inward at regular intervals along the side. 0), the spring female thread (120) is housed inside the outer casing (110) such that the pressing jaw (114) is disposed between the lower locking ring (123) and the upper locking ring (121), and when a rotational force is applied by a standard tool in a direction in which the outer casing (110) is fastened to the bolt (10) with the nut (20) fastened to the bolt (10), the pressing jaw (114) comes into contact with and presses the upper locking ring (121), expanding the outer diameter of the spring female thread (120), and the outer casing (110) and the spring female thread (120) rotate together and are fastened along the bolt (10).

Description

[Technical Field]

[0001] The present invention relates to a locking spring nut, and more particularly to a locking spring nut that is fastened to the bottom of a nut fastened to a bolt using a standard tool to prevent the nut from loosening. [Background technology]

[0002] Generally, bolts and nuts are used to fasten two objects together in a variety of fields, such as assembling automobile accessories, electronic components, furniture, and structures at construction sites. However, these bolt and nut connections can loosen due to vibrations caused by vehicle movement or external impacts, leading to accidents.

[0003] In particular, the installation of electronic devices in automobiles and general industrial machinery has recently become widespread, requiring high currents and high voltages. However, if the bolt and nut connections at the power supply connection points become loose, there is a risk of sparks causing fires or power outages in electronic devices, which can lead to accidents.

[0004] To prevent such loosening of the nut, a female screw spring is used, which is wound to fit the male thread of the bolt. If the male thread of the bolt is a right-hand thread, the female screw spring is provided in a shape that can be inserted into the male thread.

[0005] The female screw locking spring advances along the male thread of the bolt to tighten the screw, and when the bolt tries to loosen, its outer diameter shrinks, applying friction to the male thread and preventing the bolt from loosening.

[0006] However, such a locking female screw spring is in the form of a spring wound a certain number of times to have an outer diameter that corresponds to the male thread of the bolt, so there is a limit to how much it can be fastened to a bolt using standard tools at industrial sites.

[0007] This has been a hassle for workers to manually tighten the bolts or to design them in a form inserted inside the nuts. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Korean Patent Registration No. 10-1907342 Summary of the Invention [Problem to be solved by the invention]

[0009] The object of the present invention is to solve the above-mentioned problems by providing a locking spring nut that can be quickly tightened onto a bolt using standard tools while maintaining the locking function of a conventional female thread spring.

[0010] Another object of the present invention is to provide a locking spring nut that, when fastened to the bottom of a nut fastened to a bolt using a standard tool, can be allowed to spin freely, improving the adaptability of the tool.

[0011] The above objects and some advantages of the present invention will become more apparent to those skilled in the art from the following preferred embodiments of the present invention. [Means for solving the problem]

[0012] The object of the present invention can be achieved by a locking spring nut that is coupled to the lower part of a nut (20) fastened to a bolt (10) and prevents the nut (20) from loosening. The locking spring nut of the present invention includes a spring female thread (120) that is wound around the male thread of the bolt (10) several times and has a lower locking ring (123) and an upper locking ring (121) that protrude radially outward in different directions from the lower end and the upper end, respectively; and an outer casing (110) that has a box shape and receives the spring female thread (120), a bottom plate (111) through which a bolt insertion hole (111a) through which the bolt (10) is inserted is formed, and a plurality of pressing jaws (114) that are recessed inward at regular intervals along the side. The spring female thread (120) is The pressing jaw (114) is housed inside the outer casing (110) so as to be positioned between the lower locking ring (123) and the upper locking ring (121). When a rotational force is applied by a standard tool in the direction in which the outer casing (110) is fastened to the bolt (10) with the nut (20) fastened to the bolt (10), the pressing jaw (114) contacts and presses the upper locking ring (121), expanding the outer diameter of the spring female thread (120), and the outer casing (110) and the spring female thread (120) rotate together and are fastened along the bolt (10).

[0013] According to one embodiment, the outer casing (110) includes a side (113) having a polygonal cross section so that standard tools can be applied, and a plurality of covering blades (115) that are folded inward from the upper end of the side (113) to cover the spring female thread (120), and the plurality of pressing jaws (114) can be recessed inward from the plate surface of each side of the polygon to a depth such that the spring female thread (120) is aligned with the center of the outer casing (110) and the spring thread (129) can be threadably coupled to the male thread of the bolt (10).

[0014] According to one embodiment, when the outer casing (110) is connected to the bolt (10) at the lower part of the nut (20), if an external force acts in a direction that loosens the bolt (10) or the nut (20), the upper locking ring (121) comes into contact with the pressing jaw (114) with the outer casing (110) fixed, and the outer diameter is reduced, thereby preventing the bolt or the nut (20) from loosening.

[0015] The object of the present invention can be achieved by a locking spring nut that is coupled to the lower part of a nut (20) fastened to a bolt (10) and prevents the nut (20) from loosening. The locking spring nut of the present invention comprises: a spring female thread (120) that is wound around the male thread of the bolt (10) several times and has a lower locking ring (123) and an upper locking ring (121) that protrude radially outward in different directions from the lower end and upper end; a ratchet outer casing (110a) that has a box shape and receives the spring female thread (120), and has a bottom plate (111) through which a hub insertion hole (111a-1) having an outer diameter larger than the outer diameter of the bolt (10) is formed and has a plurality of short pressing jaws (114-1) recessed inward at regular intervals along the side; and a ratchet outer casing (110a) that is received inside the ratchet outer casing (110a) and receives the spring female thread (120) and has the short pressing jaws (114-1) along the side. The ratchet outer casing (110a) includes an inner casing (130) having a plurality of pushing jaws (132) recessed inward to correspond to the spring pushing jaws (114-1), and the spring female screw (120) is housed inside the inner casing (130) so that the pushing jaws (132) are disposed between the lower locking ring (123) and the upper locking ring (121). When the nut (20) is fastened to the bolt (10) and a rotational force is applied by a standard tool in a direction in which the ratchet outer casing (110a) is fastened to the lower part of the nut (20), the pushing jaws (132) contact and press the upper locking ring (121), and the outer diameter of the spring female screw (120) expands and is fastened along the bolt (10).

[0016] According to one embodiment, the inner casing (130) includes an inner casing wall (131) on which the plurality of pressing jaws (132) are formed; a bearing bottom plate (133) that is formed horizontally with a certain area at the bottom of the wall of the inner casing (130) and is disposed overlapping the bottom plate (111); and a protruding hub (133a) that is formed with a certain area so as to form a step downward from the bearing bottom plate (133), protrudes outward through the hub insertion hole (111a-1), and has an internal bolt insertion hole (133c) into which the bolt (10) is inserted. The pressing jaw (132) may be recessed to a depth such that the female thread (120) of the spring is aligned with the center of the inner casing (130) so that the female thread (120) of the spring can be threadably coupled to the male thread of the bolt (10).

[0017] According to one embodiment, when the protruding hub (133a) is in contact with the lower part of the nut (20) fastened to the bolt (10) and a standard tool applies a rotational force to the ratchet outer casing (110a) in the direction of fastening the nut (20), the short pushing jaw (114-1) passes over the pushed jaw (132), and the ratchet outer casing (110a) rotates freely outside the inner casing (130) around the protruding hub (133a). [Effects of the Invention]

[0018] The locking spring nut of the present invention houses the female spring thread used to lock the bolt in place inside an outer casing that can be operated with a standard tool, and the pressure jaws formed on the inner wall surface press the upper and lower locking rings of the female spring thread to fasten or loosen the nut to the bolt.

[0019] This has the advantage that the spring can be quickly fastened to the bolt using standard tools while maintaining the anti-loosening function of the female thread of the spring.

[0020] In addition, the locking spring nut of the present invention has an inner casing, a push jaw that is pushed by the push jaw, and a ratchet function that allows the outer casing to spin freely when the locking spring nut is tightened at the bottom of the nut. This improves tool adaptability using standard tools and allows for faster installation. [Brief explanation of the drawings]

[0021] [Figure 1] 1 is a perspective view showing a state in which a locking spring nut according to a preferred embodiment of the present invention is fastened to a bolt together with a nut. [Figure 2] 1 is a perspective view showing the structure of a locking spring nut according to a preferred embodiment of the present invention; [Figure 3] 1 is an exploded perspective view showing the structure of a locking spring nut according to a preferred embodiment of the present invention; [Figure 4] 1 is a side cross-sectional view showing a cross-sectional configuration of a locking spring nut according to a preferred embodiment of the present invention fastened to a bolt together with a nut. [Figure 5] 10A to 10C are cross-sectional views illustrating an example of an operation process of a locking spring nut according to a preferred embodiment of the present invention. [Figure 6] 10A to 10C are diagrams showing various modifications of the locking spring nut according to a preferred embodiment of the present invention; [Figure 7] FIG. 10 is an exploded perspective view showing the configuration of a locking spring nut according to another embodiment of the present invention. [Figure 8] 10 is a side cross-sectional view showing a cross-sectional configuration of a locking spring nut according to another embodiment of the present invention in a state where the nut is fastened to a bolt. FIG. [Figure 9] 10A to 10C are cross-sectional views illustrating an example of the operation process of a locking spring nut according to another embodiment of the present invention. [Figure 10] 10A to 10C are cross-sectional views illustrating an example of the operation process of a locking spring nut according to another embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] In order to fully understand the present invention, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention can be modified in various ways, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. These embodiments are provided to more completely explain the present invention to those skilled in the art to which the invention pertains. Therefore, the shapes of elements in the drawings may be exaggerated to emphasize a clearer description. It should be noted that the same components may be designated by the same reference numerals in the various drawings. Detailed descriptions of known functions and configurations that are deemed to unnecessarily obscure the gist of the present invention will be omitted.

[0023] FIG. 1 is a perspective view showing a locking spring nut 100 according to a preferred embodiment of the present invention fastened to a bolt 10 together with a nut 20, FIG. 2 is a perspective view showing the configuration of the locking spring nut 100, FIG. 3 is an exploded perspective view showing the configuration of the locking spring nut 100, FIG. 4 is a cross-sectional view showing the cross-sectional configuration of FIG. 1, and FIG. 5 is an example of a planar cross-section showing the operating process of the locking spring nut 100.

[0024] As shown in FIG. 1, the locking spring nut 100 of the present invention is fastened to the bolt 10 so as to be in close contact with the lower part of the nut 20 fastened to the bolt 10, preventing rotation of the bolt 10 and loosening of the bolt 10 and the nut 20, and ensuring that the fastened state of the bolt 10 and the nut 20 is stably maintained for a long period of time.

[0025] As shown in FIG. 2, the locking spring nut 100 includes a box-shaped outer casing 110 and a spring female screw 120 housed inside the outer casing 110.

[0026] The outer periphery of the outer casing 110, with the spring female thread 120 housed therein, is rotated forward and backward using a standard tool, and the spring female thread 120 is fastened or loosened to the bolt 10. Because the outer casing 110 houses the spring female thread 120, the worker only needs to use a standard tool to turn the outer casing 110 forward and backward in the same way as a regular nut, which has the advantage of improving tool adaptability and allowing the locking spring nut 100 to be fastened to the bolt 10 quickly.

[0027] The spring female thread 120 is threadedly coupled to the male thread 13 of the bolt 10 by rotating the outer casing 110, thereby preventing loosening of the bolt 10. The spring female thread 120 is wound several times to have an inner diameter R that corresponds to the female thread of the bolt 10.

[0028] In the preferred embodiment of the present invention, the spring female thread 120 is provided in a form wound twice, but this is only one example, and in some cases it may be wound once, or may be wound three or more times.

[0029] An upper locking ring 121 and a lower locking ring 123 protruding radially outward are provided at the upper and lower parts of the spring female screw 120. The upper locking ring 121 and the lower locking ring 123 are bent in opposite directions.

[0030] As shown in FIG. 3, the outer casing 110 includes a bottom plate 111, side surfaces 113 formed perpendicular to the outer periphery of the bottom plate 111, and a plurality of cover blades 115 foldably coupled to the upper portions of the side surfaces 113.

[0031] Here, it is preferable that the outer casing 110 has a polygonal cross section so that it can be rotated using a standard tool, such as a spanner, a wrench, an electric screwdriver, a nut runner, etc. Thus, the outer casing 110 can be provided in various shapes, such as a triangle as shown in Fig. 6(a), a square as shown in Fig. 6(b), a hexagon as shown in Fig. 6(c), and corners that can be gripped by a standard tool as shown in Figs. 6(d) to 6(e).

[0032] The bottom plate 111 is formed in a polygonal shape, and a bolt insertion hole 111 a into which the bolt 10 is inserted is formed through the plate surface so as to correspond to the outer diameter of the bolt 10 .

[0033] The cover blades 115 are provided on the top of the side surface 113 in a number corresponding to the number of sides of the polygon, and are folded around the folding line 115a to cover the top of the outer casing 110 in which the spring female screw 120 is housed, thereby fixing the position of the spring female screw 120.

[0034] As shown in FIG. 5, the cover blade 115 is provided so as to be in close contact with the upper part of the spring female screw 120, and fixes the position of the spring female screw 120 so that it does not move up and down inside the outer casing 110.

[0035] Between adjacent covering wings 115, cutout holes 115b are formed in the corner regions to prevent interference between the covering wings 115 when the covering wings 115 are folded around the folding lines 115a.

[0036] The area of ​​each covering blade 115 is determined so that when multiple covering blades 115 are folded together, a space corresponding to the bolt insertion hole 111a is formed therein, as shown in FIG.

[0037] The side surface 113 is formed to have a polygonal shape and has a height that can accommodate the internal spring thread 120 therein. A pressing jaw 114 is recessed into the center region of each side of the polygon that forms the side surface 113. The recessed depth h of the pressing jaw 114 is formed to a depth that allows the multiple pressing jaws 114 to press the outer periphery of the internal spring thread 120 so that the internal spring thread 120 is aligned with the center of the outer casing 110, as shown in Figures 4(a) and 4(b).

[0038] The recess depth of the pressing jaw 114 is designed taking into consideration the outer diameter of the spring female thread 120 and the width of the outer casing 110 .

[0039] When the outer casing 110 is rotated using a standard tool, the pressing jaw 114 presses against the upper locking ring 121 or the lower locking ring 123 of the spring female screw 120, causing the spring female screw 120 to rotate together with the outer casing 110, thereby tightening or loosening the bolt 10.

[0040] 4(a), the pressing jaws 114 are formed by bending the cross section into a triangle. One of the pressing jaws 114 is located between the upper locking ring 121 and the lower locking ring 123.

[0041] The left inclined surface 114b and the right inclined surface 114a of the pressing jaw 114 disposed between the upper locking ring 121 and the lower locking ring 123 press the upper locking ring 121 or the lower locking ring 123 depending on the rotation direction of the outer casing 110.

[0042] As an example, (a) of Figure 4 is an illustration showing the process of tightening the anti-loosening spring nut 100 to the bolt 10 when the bolt 10 is a right-handed thread and the spring female thread 120 is threadedly connected to the male thread of the bolt 10.

[0043] After the bolt 10 is inserted into the object A to be fastened, the nut 20 is fastened to the bottom of the bolt 10. The worker uses a standard tool to fasten the locking spring nut 100 to the bolt 10 protruding from the bottom of the nut 20.

[0044] As shown in the figure, when a standard tool grips the side surface 113 and rotates the outer casing 110 clockwise, the left inclined surface 114b of the pressing jaw 114 rotates and presses the upper locking ring 121. The pressure P applied by the left inclined surface 114b to the upper locking ring 121 causes the upper locking ring 121 to bend and expand in the clockwise direction.

[0045] As a result, the inner diameter R' of the spring female thread 120 expands, as indicated by the dotted line, to be larger than the initial outer diameter R. This reduces the frictional force of the spring female thread 120 against the contact portion of the inclined surface between the male thread 13 of the bolt 10 and the hole, allowing it to move on the male thread 13 and be fastened to the bottom of the nut 20 as shown in FIG.

[0046] When the locking spring nut 100 is fastened to the bolt 10 so as to be in close contact with the nut 20 in this manner, the spring female thread 120 maintains its initial inner diameter R and remains connected to the male thread 13 of the bolt 10.

[0047] If an external force due to vibration or impact acts in a direction that loosens the bolt 10 or nut 20, the spring female screw 120 connected to the bolt 10 will also try to rotate in the loosening direction. At this time, since the outer casing 110 is fixed, the spring female screw 120 rotates counterclockwise as shown in Figure 4(a), and the upper locking ring 121 presses against the left inclined surface 114b of the pressing jaw 114.

[0048] Because the force of the upper locking ring 121 pressing against the pressing jaw 114 is smaller than the rotational torque applied by the standard tool, the internal thread of the spring 120 moves in the direction in which the upper locking ring 121 faces the lower locking ring 123, narrowing the inner diameter and increasing the frictional force applied to the contact area between the external thread of the bolt 10 and the hole, thereby preventing the bolt 10 or nut 20 from loosening.

[0049] On the other hand, as shown in (b) of Figure 4, when a counterclockwise force is applied to the outer casing 110 using a standard tool to release the bolt 10 or nut 20, the right inclined surface 114a of the pressure jaw 114 presses against the lower locking ring 123, expanding the inner diameter R' of the spring female thread 120, and the anti-loosening spring nut 100 can be easily removed from the bolt 10.

[0050] FIG. 7 is an exploded perspective view showing the configuration of a locking spring nut 100a according to another embodiment of the present invention, and FIG. 8 is a half-side cross-sectional view showing the locking spring nut 100a of another embodiment fastened to a bolt 10 to which a nut 20 has been fastened.

[0051] As shown, the locking spring nut 100 a according to another embodiment includes a ratchet outer casing 110 a and an inner casing 130 housed inside the ratchet outer casing 110 a and accommodating the spring female thread 120 .

[0052] The locking spring nut 100a according to this alternative embodiment further includes an inner casing 130 compared to the locking spring nut 100 of the preferred embodiment. When the locking spring nut 100a is fastened to the bottom of the nut 20 using an electric tool such as a rechargeable screwdriver or nut runner, the ratchet outer casing 110a spins freely when the tightening torque reaches a limit value, further improving tool adaptability.

[0053] The spring female screw 120 according to the other embodiment has the same structure as that of the preferred embodiment, and therefore a detailed description thereof will be omitted.

[0054] The ratchet outer casing 110a has the same structure as the outer casing 110 of the preferred embodiment, but the short pressing jaw 114-1 formed on the side surface 113 is recessed to a shallower depth than the pressing jaw 114. Also, while the locking spring nut 100 of the preferred embodiment has the bolt insertion hole 111a formed in the bottom plate 111 formed to correspond to the outer diameter of the bolt 10, the hub insertion hole 111a-1 formed in the bottom plate 111 of the locking spring nut 100a of the other embodiment is formed to have a diameter R1 wider than the bolt insertion hole 111a.

[0055] The inner casing 130 is housed inside the outer casing 110 and houses the spring female screw 120. The inner casing 130 is formed in the shape of a box with an open top, and includes an inner casing wall 131 and a bearing bottom plate 133.

[0056] The inner casing wall 131 may be formed in various shapes such as a circle or a polygon as long as it can accommodate the spring female thread 120. The plate surface of the inner casing wall 131 is provided with a plurality of pressing jaws 132 recessed inward in number and positions corresponding to the short pressing jaws 114-1 of the ratchet outer casing 110a.

[0057] As shown in FIG. 9(a), a plurality of pushing jaws 132 are formed to protrude toward the outer periphery of the spring female screw 120, and support the spring female screw 120 so that it is aligned with the center of the ratchet outer casing 110a and the inner casing 130.

[0058] When the ratchet outer casing 110a is rotated forward or backward using a standard tool, the pushing jaw 132 is pressed by the short pushing jaw 114-1, as shown in Figures 4(a) and 4(b), to pressurize the upper locking ring 121 or the lower locking ring 123 of the spring female thread 120. This causes the upper locking ring 121 and the lower locking ring 123 to expand, and the outer diameter R' of the spring female thread 120 expands compared to the initial outer diameter R, making it easier to tighten or loosen the bolt 10.

[0059] The bearing bottom plate 133 is disposed so as to overlap the bottom plate 111 of the ratchet outer casing 110a. The area of ​​the bearing bottom plate 133 is formed to be the area overlapping the bottom plate 111.

[0060] A protruding hub 133a exposed to the outside through a hub insertion hole 111a-1 of the bottom plate 111 forms a step inside the bearing bottom plate 133. As shown enlarged in FIG. 8, the protruding hub 133a is stepped from the bearing bottom plate 133 by a step 133b and protrudes to the outside through the hub insertion hole 111a-1 by a certain thickness d1.

[0061] At this time, a certain gap d2 of play is formed between the bearing bottom plate 133 and the bottom plate 111, and a certain gap W of play is formed between the hub insertion hole 111a-1 and the protruding hub 133a.

[0062] The outer diameter R1 of the hub insertion hole 111a-1 is formed to be the same as the inner diameter R1 of the bearing bottom plate 133, and the diameter of the inner bolt insertion hole 133c formed in the protruding hub 133a is formed to correspond to the outer diameter of the bolt 10.

[0063] An angle a between the protruding hub 133a and the step 133b and an angle b between the inner casing wall 131 and the bearing bottom plate 133 are formed in a curved shape. The shapes of the bearing bottom plate 133 and the protruding hub 133a are such that after the locking spring nut 100a is fastened to the bottom of the nut 20, the ratchet outer casing 110a rotates freely by minimizing friction between the protruding hub 133a and the bearing bottom plate 133.

[0064] 8, the recess depth h1 of the short pushing jaw 114-1 is formed to be lower than the recess depth h2 of the pushing jaw 132. In particular, the short pushing jaw 114-1 is formed to a depth that allows it to move beyond the pushing jaw 132 if a rotational force in the fastening direction by a tool continues to act when the locking spring nut 100a is fastened to the bottom of the nut 20 and the protruding hub 133a is in contact with the bottom surface of the nut 20 (after the limit value of the tightening torque is reached when the locking spring nut is rotated and tightened with a tool).

[0065] When the locking spring nut 100a of another embodiment of the present invention is fastened to the bolt 10, as shown in Figure 9(a), the ratchet outer casing 110a is rotated clockwise by a tool, causing the short pushing jaw 114-1 to push the pushing jaw 132 of the inner casing 130, which then presses the upper locking ring 121. This widens the spring female thread 120, expanding its outer diameter and reducing the frictional force with the bolt 10, allowing the nut to be fastened to the bolt 10.

[0066] As shown in FIG. 8, when the locking spring nut 100a is fastened to the bottom of the nut 20 and the protruding hub 133a comes into contact with the underside of the nut 20, the axial force increases, and the frictional force acting on the protruding hub 133a and the underside of the nut 20 increases, so that the inner casing 130 is fixed and does not rotate any further.

[0067] If the rotational force of the tool continues to act while the inner casing 130 is fixed in this manner, the short pushing jaw 114-1 will pass over the pushing jaw 132, causing the ratchet outer casing 110a to spin freely outside the inner casing 130, as shown in Figure 10.

[0068] At this time, as shown in FIG. 8, the protruding hub 133a contacts the underside of the nut 20 and applies a contact force, fixing the position of the inner casing 130. Since the ratchet outer casing 110a has a distance W between the protruding hub 133a and the hub insertion hole 111a-1 and a distance d2 between the bearing bottom plate 133 and the bottom plate 111, the short pushing jaw 114-1 rotates freely beyond the pushed jaw 132, thereby performing the ratchet function.

[0069] This ratchet function has the advantage that the worker can tighten the locking spring nut 100a onto the bolt 10 more quickly.

[0070] On the other hand, when the locking spring nut 100a of the present invention that has been fastened to the bolt 10 is loosened from the bolt 10, when a rotational force is applied by a tool in the counterclockwise direction as shown in (b) of Figure 9, the short pushing jaw 114-1 pushes the pushing jaw 132, and the pushing jaw 132 presses the lower locking ring 123, expanding the outer diameter of the spring female thread 120 and causing the nut to loosen from the bolt 10.

[0071] As described above, the locking spring nut of the present invention houses the female spring thread used to lock the bolt in place inside an outer casing that can be operated with a standard tool, and the pressure jaws formed on the inner wall surface pressurize the upper and lower locking rings of the female spring thread to fasten or loosen the nut to the bolt.

[0072] This has the advantage that the spring can be quickly fastened to the bolt using standard tools while maintaining the anti-loosening function of the female thread of the spring.

[0073] In addition, the locking spring nut of the present invention has an inner casing, a pushing jaw that is pushed by a pushing jaw, and a ratchet function that allows the outer casing to spin freely when the locking spring nut is fastened at the bottom of the nut. This improves tool adaptability with standard tools and allows for faster installation.

[0074] The above-described embodiments of the locking spring nut of the present invention are merely illustrative, and those skilled in the art will recognize that numerous modifications and equivalent embodiments are possible. Therefore, it should be understood that the present invention is not limited to the embodiments described in the above detailed description. Therefore, the true technical scope of protection of the present invention should be determined by the technical ideas of the appended claims. Furthermore, the present invention should be understood to include all modifications, equivalents, and alternatives within the spirit and scope of the present invention as defined by the appended claims. [Industrial Applicability]

[0075] It is used in a variety of fields, including assembling automobile accessories, electronic components, furniture, and general industrial machinery to fasten and join two objects, such as assembling structures at construction sites. [Explanation of symbols]

[0076] 10 volts 11 Bolt head 13 threads 20 nuts 100 Anti-loosening spring nut 110 outer casing 110a Ratchet outer casing 111 Bottom plate 111a Bolt insertion hole 111a-1 Hub insertion hole 113 Side 114 Push Chin 114-1 Short push jaw 114a Right side slope 114b Left side slope 115 Covering feathers 115a folding line 115b Incision hole 120 Spring female screw 121 Upper locking ring 123 Lower locking ring 130 Inner casing 131 Inner casing wall 132 Pressed Jaw 133 Bearing bottom plate 133a Protruding hub 133b Step 133c Internal bolt insertion hole

Claims

1. A locking spring nut is attached to the lower part of a nut (20) fastened to a bolt (10) to prevent the nut (20) from loosening. a spring female screw (120) wound several times around the male screw of the bolt (10), with a lower locking ring (123) and an upper locking ring (121) respectively protruding radially outward in different directions from the lower and upper ends; The outer casing (110) has a box shape in which the spring female screw (120) is accommodated, a bolt insertion hole (111a) through which the bolt (10) is inserted is formed in a bottom plate (111), and three or more pressing jaws (114) are formed along the side surface at regular intervals toward the inside, The spring female screw (120) is accommodated inside the outer casing (110) so that the pressing jaw (114) is disposed between the lower locking ring (123) and the upper locking ring (121); The three or more pressing jaws (114) are recessed to a depth such that the three or more pressing jaws (114) press the outer periphery of the spring female thread (120) excluding the lower locking ring (123) and the upper locking ring (121) to align the spring female thread (120) with the center of the outer casing (110), When the nut (20) is fastened to the bolt (10) and a rotational force is applied by a standard tool in the direction of fastening the outer casing (110) to the bolt (10), the pressing jaw (114) contacts and presses the upper locking ring (121), expanding the outer diameter of the spring female thread (120), causing the outer casing (110) and the spring female thread (120) to rotate together and fasten along the bolt (10).

2. The outer casing (110) includes a side surface (113) having a polygonal cross section so that a standard tool can be used, and a plurality of covering blades (115) that are folded inward from the upper end of the side surface (113) and cover the spring female thread (120).

2. The anti-loosening spring nut according to claim 1, wherein the three or more pressing jaws (114) are recessed inward from the plate surfaces of each side of the polygon to a depth that allows the spring female threads (120) to be threadably coupled to the male threads of the bolt (10).

3. 3. The anti-loosening spring nut according to claim 2, wherein when an external force acts in a direction that loosens the bolt (10) or the nut (20) with the outer casing (110) connected to the bolt (10) at the bottom of the nut (20), the upper locking ring (121) comes into contact with the pressing jaw (114) with the outer casing (110) fixed, thereby reducing its outer diameter and preventing the bolt or the nut (20) from loosening.

Images