Lock nut

Abstract

The invention relates to the technical field of mechanical fasteners, in particular to a lock nut which comprises a nut body, one end of the nut body is coaxially and fixedly connected with a conical barrel, a bolt is further sleeved with a first lock sleeve and a second lock sleeve, and the first lock sleeve and the second lock sleeve are in threaded connection. A conical surface is arranged on the inner circumference of the first anti-loose sleeve, when the nut body is connected to a bolt in a threaded mode, the bottom of the second anti-loose sleeve can tightly abut against a connected piece, and meanwhile the conical barrel tightly abuts against the conical surface of the inner circumference of the first anti-loose sleeve. In addition, a stop piece can be inserted into the nut body to connect the first anti-loose sleeve and the nut body together, so that when a connected piece vibrates frequently, the nut body rotates to enable the second anti-loose sleeve to be tightly connected to the connected piece in an abutting mode, and looseness is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of mechanical fasteners, in particular to a locking nut. Background Art

[0002] In mechanical connections, bolt connections are often widely used. In this connection method, the nut achieves self-locking through the single-sided extrusion friction of the internal and external threads. Under normal circumstances, the nut will not loosen. However, when subjected to external forces such as vibration, the connecting parts may undergo elastic deformation, resulting in gaps between the threads and separation of the internal and external threads. At this time, the friction between the threads will disappear instantly, and the self-locking effect of the nut will fail, which will cause the nut to loosen, resulting in failure of the bolt connection. Therefore, in bolt connections, it is crucial to prevent the nut from loosening.

[0003] Anti-loosening nuts are generally used to prevent nuts from loosening. As the name suggests, anti-loosening nuts are special nuts designed to prevent nuts from loosening due to vibration, impact and other factors during use. Anti-loosening nuts are widely used in machinery, aviation, automobiles, bridges and other fields, and are particularly important in situations that require high reliability and safety.

[0004] For example, Chinese patent CN205064531U discloses an eccentric groove anti-loosening nut, which includes a locking nut and a groove nut. The groove nut is provided with a groove, and the non-bearing surface of the groove nut includes a clamping surface, and a deformation surface is extended adjacent to the clamping surface, wherein the clamping surface is located at the upper end of the notch of the groove; during installation, the bearing surface of the groove nut contacts the clamped workpiece, the locking nut is screwed to press the non-bearing surface of the groove nut, and the clamping surface of the groove nut bears pressure to press the groove of the groove nut to complete the locking.

[0005] However, when the vibration force applied to the nut in the above solution is large enough to overcome the friction force, the nut will still loosen, thus causing the anti-loosening failure. Summary of the invention

[0006] Based on this, it is necessary to provide a kind of anti-loosening nut to solve the problem that the anti-loosening effect of the current anti-loosening nut is poor.

[0007] The above purpose is achieved through the following technical solutions: A locking nut, comprising: A nut body, one end of which is coaxially and fixedly provided with a conical tube, the large end of which is connected to the nut body; A first anti-loosening sleeve, wherein the first anti-loosening sleeve is located at the outer periphery of the tapered tube, and the inner periphery of the first anti-loosening sleeve has a tapered surface, and the tapered surface is adapted to the outer periphery of the tapered tube; A second anti-loosening sleeve, wherein the second anti-loosening sleeve is threadedly connected to the outer periphery of the first anti-loosening sleeve, and a thread pitch of the second anti-loosening sleeve is greater than a thread pitch of the nut body; The first anti-loosening sleeve and the second anti-loosening sleeve are threadedly connected and then pass through the bolt, the bottom of the second anti-loosening sleeve abuts against the connected member, the nut body is threadedly connected to the bolt and gradually approaches the first anti-loosening sleeve, and the outer periphery of the tapered tube gradually contacts the inner periphery of the first anti-loosening sleeve; A fixing assembly, wherein the fixing assembly is configured to fix the first anti-loosening sleeve and the nut body together after the outer periphery of the tapered tube contacts the inner periphery of the first anti-loosening sleeve; A gasket assembly, wherein the gasket assembly can increase the friction force at the bottom of the second anti-loosening sleeve.

[0008] Furthermore, the fixing assembly includes a stop plate, a first stop groove and a second stop groove, there are multiple first stop grooves and all are opened on the inner circumference of the first anti-loosening sleeve, multiple first stop grooves are arranged in a circular array on the inner circumference of the first anti-loosening sleeve and all extend along the axial direction of the first anti-loosening sleeve, the second stop groove is opened on the outer circumference of the nut body, and the stop plate can be simultaneously located in the first stop groove and the second stop groove to clamp the first anti-loosening sleeve and the nut body.

[0009] Furthermore, the second retaining groove passes through the outer periphery of the nut body and the outer periphery of the tapered tube.

[0010] Furthermore, the gasket assembly includes a first gasket and a second gasket, the first gasket and the second gasket are both inserted into the bolt, and the first gasket and the second gasket respectively abut against the upper and lower ends of the connected component.

[0011] Furthermore, the first gasket and the second gasket are both made of nylon.

[0012] Furthermore, the outer periphery of the first anti-loosening sleeve has a first hexagonal surface, and the first hexagonal surface has the same size as the hexagonal surface on the outer periphery of the nut body.

[0013] Furthermore, the outer circumference of the second anti-loosening sleeve has a second hexagonal surface, and the second hexagonal surface has the same size as the hexagonal surface of the outer circumference of the nut body.

[0014] Furthermore, the material of the first anti-loosening sleeve is the same as the material of the nut body.

[0015] Furthermore, the material of the second anti-loosening sleeve is the same as the material of the nut body.

[0016] Furthermore, the material of the conical tube is the same as that of the nut body.

[0017] The beneficial effects of the present invention are: The present invention has a tapered tube fixed and coaxially connected at one end of a nut body, a first anti-loosening sleeve and a second anti-loosening sleeve are also sleeved on the bolt, the first anti-loosening sleeve and the second anti-loosening sleeve are threadedly connected, and the thread spacing between the two is greater than the thread spacing of the nut body, the inner circumference of the first anti-loosening sleeve has a tapered surface, when the nut body is threadedly connected to the bolt, the bottom of the second anti-loosening sleeve can be tightly abutted against the connected part, and the tapered tube is tightly abutted against the tapered surface of the inner circumference of the first anti-loosening sleeve, and a stopper can also be inserted into the nut body to connect the first anti-loosening sleeve and the nut body together, so that when the connected part vibrates frequently, the nut body can rotate to tightly abut the second anti-loosening sleeve against the connected part to prevent loosening.

[0018] The present invention provides a first gasket and a second gasket so that the pre-tightening force on the upper and lower ends of the connected member is more uniform. At the same time, the first gasket is located between the connected member and the bottom of the second anti-loosening sleeve to increase the friction force of the second anti-loosening sleeve.

[0019] The present invention provides a first hexagonal surface and a second hexagonal surface with the same size as the outer six prism surfaces of the nut body on the outer periphery of the first anti-loosening sleeve and the outer periphery of the second anti-loosening sleeve, so that operators can use a wrench of uniform specification to install the nut body, thereby improving installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 A schematic diagram of the structure of a locking nut provided in one embodiment of the present invention; Figure 2 An exploded view of a locking nut provided in one embodiment of the present invention; Figure 3 for Figure 1 A front view of a locking nut provided in an embodiment; Figure 4 for Figure 1 A top view of a locking nut provided in one embodiment; Figure 5 for Figure 4 A cross-sectional view of a locking nut along AA provided in an embodiment; Figure 6 A schematic structural diagram of a nut body and a tapered barrel of a locking nut provided in one embodiment of the present invention; Figure 7 for Figure 6 A top view of a nut body and a tapered barrel of a locking nut provided in one embodiment; Figure 8 A schematic structural diagram of a first anti-loosening sleeve of an anti-loosening nut provided in one embodiment of the present invention; Fig. 9 for Figure 8A top view of a first locking sleeve of a locking nut provided in one embodiment.

[0021] in: 100, nut body; 110, conical cylinder; 120, first gasket; 130, second gasket; 140, bolt; 150, hexagonal head; 200, first anti-loosening sleeve; 210, external thread; 220, first hexagonal surface; 230, conical surface; 240, second anti-loosening sleeve; 250, internal thread; 260, second hexagonal surface; 300, stopper plate; 310, first stopper groove; 320, second stopper groove. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0024] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] Refer to the following Figure 1-Figure 9 To describe a locking nut provided by the present invention.

[0026] A locking nut is suitable for a connected part that is frequently vibrated. The connected part is fixedly connected by a bolt 140 and a locking nut. Figure 2 As shown, a conical cylinder 110 is coaxially and fixedly arranged on one end of the nut body 100 of the anti-loosening nut, the large end of the conical cylinder 110 is fixedly connected to the lower end of the nut body 100, the small end of the conical cylinder 110 faces downward, the thread inside the conical cylinder 110 is the same as the thread inside the nut body 100 and the two are connected, and the anti-loosening nut also includes a first anti-loosening sleeve 200 and a second anti-loosening sleeve 240, the inner circumference of the first anti-loosening sleeve 200 has a conical surface 230, and after the first anti-loosening sleeve 200 is inserted on the bolt 140, the inner circumference of the first anti-loosening sleeve 200 is The conical surface 230 can cooperate with the outer periphery of the conical tube 110 at one end of the threaded body, and the second anti-loosening sleeve 240 is threadedly connected to the outer periphery of the first anti-loosening sleeve 200. An internal thread 250 is arranged on the inner periphery of the second anti-loosening sleeve 240, and an external thread 210 is arranged on the outer periphery of the first anti-loosening sleeve 200. The two are connected together by the internal thread 250 and the external thread 210. The thread spacing of the external thread 210 of the first anti-loosening sleeve 200 and the internal thread 250 of the second anti-loosening sleeve 240 are both greater than the thread spacing of the bolt 140 and the nut body 100.

[0027] The first anti-loosening sleeve 200 and the second anti-loosening sleeve 240 are threadedly connected together and connected in place (connected in place means that the threads of the first anti-loosening sleeve 200 and the second anti-loosening sleeve 240 are matched to the limit, that is, the lower end of the first anti-loosening sleeve 200 has abutted against the limit position of the inner circumference of the second anti-loosening sleeve 240 and can no longer rotate), and then they are jointly inserted into the bolt 140. At this time, the connected part is located at the lower end of the bolt 140 and the second anti-loosening sleeve 240. Then, the nut body 100 is threadedly connected to the bolt 140. The nut body 100 gradually moves to the inner circumference of the second anti-loosening sleeve 240 during the rotation. Moving in the direction close to the first anti-loosening sleeve 200, the conical tube 110 on one end of the nut body 100 gradually approaches the conical surface 230 of the inner circumference of the first anti-loosening sleeve 200. After the two come into contact, the nut body 100 continues to move, thereby pushing the lower end of the second anti-loosening sleeve 240 to tightly abut against the connected part. The connected part is fixed together by the bolt 140, the first anti-loosening sleeve 200, the second anti-loosening sleeve 240 and the nut body 100. At this time, the conical surface 230 of the inner circumference of the first anti-loosening sleeve 200 is tightly abutted against the outer circumference of the conical tube 110 at one end of the nut body 100.

[0028] The anti-loosening nut also includes a fixing component, which is used to fix the nut body 100 and the first anti-loosening sleeve 200 together. The specific fixing time is to fix the first anti-loosening sleeve 200 and the nut body 100 only after the conical surface 230 on the inner circumference of the first anti-loosening sleeve 200 and the outer circumference of the conical tube 110 at one end of the nut body 100 are tightly abutted together, and gasket assemblies are arranged at the upper and lower ends of the connected parts, and the gasket assemblies can increase the friction at the bottom of the second anti-loosening sleeve 240.

[0029] It should be noted that when the connected member vibrates, the bolt 140 and the nut body 100 will have a tendency to rotate forward or reverse due to the vibration. Figure 5 For example, set the nut body 100 clockwise (with Figure 4 When the nut body 100 is rotated in the clockwise direction (clockwise direction as viewed from top to bottom), the nut body 100 moves downward to push the first anti-loosening sleeve 200 and the second anti-loosening sleeve 240 to tightly abut the connected member. At the same time, it is set that when the first anti-loosening sleeve 200 rotates clockwise relative to the second anti-loosening sleeve 240, the first anti-loosening sleeve 200 moves downward relative to the second anti-loosening sleeve 240 so that the first anti-loosening sleeve 200 and the second anti-loosening sleeve 240 can be threadedly connected together. If the bolt 140 rotates forward and causes the nut body 100 to have a tendency to break away from the bolt 140, that is, the nut body 100 has a counterclockwise (clockwise direction as viewed from top to bottom) rotation relative to the bolt 140, Figure 5 The nut body 100 and the first anti-loosening sleeve 200 are connected together by a fixing assembly, and the nut body 100 drives the first anti-loosening sleeve 200 to rotate counterclockwise. Since the second anti-loosening sleeve 240 has a gasket assembly at the bottom to increase the friction, the second anti-loosening sleeve 240 and the connected part are relatively stationary, and the first anti-loosening sleeve 200 and the second anti-loosening sleeve 240 have a tendency to move away from each other. In addition, since the thread spacing of the first anti-loosening sleeve 200 and the second anti-loosening sleeve 240 is greater than the thread spacing of the nut body 100 and the bolt 140, the second anti-loosening sleeve 240 is relatively stationary. The thread spacing will make the first anti-loosening sleeve 200 rotate counterclockwise by a small angle, and the distance that the first anti-loosening sleeve 200 moves upward relative to the second anti-loosening sleeve 240 is greater than the distance that the nut body 100 moves upward relative to the bolt 140, thereby increasing the force of the bottom of the second anti-loosening sleeve 240 abutting against the connected member. At the same time, the conical surface 230 on the inner circumference of the first anti-loosening sleeve 200 squeezes the conical cylinder 110 at one end of the nut body 100, thereby increasing the friction force of the inner circumferential thread of the conical cylinder 110 on the thread on the bolt 140, thereby preventing loosening; If the bolt 140 rotates in the opposite direction and the nut body 100 has a tendency to lock, that is, the nut body 100 has a tendency to rotate clockwise relative to the bolt 140, the nut body 100 drives the first anti-loosening sleeve 200 to rotate clockwise relative to the second anti-loosening sleeve 240 through the fixing assembly. However, since the first anti-loosening sleeve 200 has been threaded into place with the second anti-loosening sleeve 240, the first anti-loosening sleeve 200 can no longer continue to rotate clockwise relative to the second anti-loosening sleeve 240, but the first anti-loosening sleeve 200 and the second anti-loosening sleeve 240 rotate clockwise at the same time, which increases the force of the nut body 100 pushing the first anti-loosening sleeve 200 and the second anti-loosening sleeve 240, so that the pre-tightening force of the bottom of the second anti-loosening sleeve 240 on the connected part is greater, thereby avoiding loosening.

[0030] It can be understood that the above-mentioned structural arrangement can avoid the loosening phenomenon caused by the bolt 140 and the nut body 100 rotating in the forward or reverse direction when the connected parts vibrate, thereby improving the connection strength of the connected parts.

[0031] Specifically, the fixing assembly in this embodiment includes a stopper 300, a first stopper groove 310 and a second stopper groove 320. There are multiple first stopper grooves 310, and the multiple first stopper grooves 310 are all arranged on the inner circumference of the first anti-loosening sleeve 200. Figure 8 As shown, the plurality of first retaining grooves 310 are arranged in a circumferential array, and the plurality of first retaining grooves 310 extend along the axial direction of the first anti-loosening sleeve 200, and the second retaining grooves 320 are provided on the outer periphery of the nut body 100, as shown in FIG. Figure 6 As shown, there is only one second stop groove 320 and the second stop groove 320 extends along the axis of the nut body 100. When the tapered cylinder 110 at one end of the nut body 100 is tightly against the inner circumference of the first anti-loosening sleeve 200, if the second stop groove 320 on the nut body 100 and one of the first stop grooves 310 on the inner circumference of the first anti-loosening sleeve 200 are aligned, the stop plate 300 is inserted into the first stop groove 310 and the second stop groove 320. At this time, the stop plate 300 is located in the first stop groove 310 and the second stop groove 320 at the same time, so the stop plate 300 connects the first anti-loosening sleeve 200 and the nut body 100 together, and when one of them rotates, it will drive the other to rotate synchronously.

[0032] It should be noted that the number of first stop grooves 310 shown in the present invention is limited, but the specific number is not limited. More first stop grooves 310 can be set to increase the probability of the second stop groove 320 corresponding to one of the multiple first stop grooves 310. If the tapered tube 110 at one end of the nut body 100 is tightly against the tapered surface 230 of the inner circumference of the first anti-loosening sleeve 200, the second stop groove 320 is not aligned with one of the first stop grooves 310, then a larger external force can be used to drive the second anti-loosening sleeve 240 to drive the first anti-loosening sleeve 200 to rotate. The specific rotation direction is the rotation direction required when the second anti-loosening sleeve 240 approaches each other relative to the first anti-loosening sleeve 200, and the second anti-loosening nut is set to rotate counterclockwise (with a rotation direction of 1 / 40) relative to the first anti-loosening nut. Figure 5 When the first anti-loosening sleeve 200 and the second anti-loosening sleeve 240 are rotated counterclockwise from top to bottom in the figure, the first anti-loosening sleeve 200 and the second anti-loosening sleeve 240 are able to approach each other, that is, a larger external force is used to drive the second anti-loosening sleeve 240 to rotate counterclockwise relative to the first anti-loosening sleeve 200. Since the first anti-loosening sleeve 200 and the second anti-loosening sleeve 240 are connected in place at this time, the second anti-loosening sleeve 240 drives the first anti-loosening sleeve 200 to rotate when the counterclockwise rotation is continued. When one of the first retaining grooves 310 on the inner circumference of the first anti-loosening sleeve 200 is aligned with the second retaining groove 320 on the nut body 100, the rotation is stopped, and then the retaining plate 300 is inserted into the portion where the first retaining groove 310 and the second retaining groove 320 are aligned, to complete the connection between the first anti-loosening sleeve 200 and the nut body 100.

[0033] In another embodiment of the present invention, the fixing component does not include a stop plate 300, but includes a first stop groove 310 and a second stop groove 320. The arrangement of the first stop groove 310 and the second stop groove 320 is the same as that in the above embodiment. The only difference is that there is no stop plate 300, but liquid glue is used to fill the first stop groove 310 and the second stop groove 320. After the liquid glue solidifies, it forms a plastic part with a function similar to the stop plate 300, thereby also serving the function of connecting the first anti-loosening sleeve 200 and the nut body 100.

[0034] It should be noted that the fixing assembly in the present invention is not limited to the above two structures, but may also be other structures, which are not specifically limited here.

[0035] In a further embodiment, the second retaining groove 320 of the present invention passes through the nut body 100 and also passes through the tapered cylinder 110. Figure 6 and Figure 7As shown, the through-type setting of the second retaining groove 320 can allow the nut body 100 and the tapered tube 110 to have space for deformation. When the connected part vibrates and causes the tapered surface 230 on the inner circumference of the first anti-loosening sleeve 200 to move upward relative to the tapered tube 110 at one end of the nut body 100, the inner circumference of the first anti-loosening sleeve 200 squeezes the tapered tube 110 at one end of the nut body 100, causing the tapered tube 110 to shrink. After the tapered tube 110 shrinks, the friction between the internal thread and the surface of the bolt 140 increases, thereby further preventing the nut body 100 and the bolt 140 from loosening.

[0036] Specifically, the gasket assembly of the present invention includes a first gasket 120 and a second gasket 130, and the first gasket 120 and the second gasket 130 are both inserted into the bolt 140, and the first gasket 120 and the second gasket 130 are respectively located at the upper and lower ends of the connected part. Specifically, the first gasket 120 is located between the connected part and the bottom of the second anti-loosening sleeve 240, and the second gasket 130 is located between the hexagonal head 150 of the bolt 140 and the connected part. When the bottom of the second anti-loosening sleeve 240 is close to the hexagonal head 150 of the bolt 140, the first gasket 120 and the second gasket 130 are tightly clamped at the upper and lower ends of the connected part.

[0037] It can be understood that the functions of the first gasket 120 and the second gasket 130 can evenly distribute the pre-tightening force of the nut body 100 and the bolt 140 and prevent loosening. When the bolt 140 is tightened, the second gasket 130 acts as a buffer on the hexagonal head 150 of the bolt 140. The first gasket 120 at the lower end of the second anti-loosening sleeve 240 can evenly disperse the pre-tightening force to the connected parts, which helps to reduce local stress concentration, reduce the deformation and damage risks of the connected parts, and improve the stability and reliability of the connection. In addition, the gasket can also help adjust the tightening force of the connection to adapt to different application requirements.

[0038] In a further embodiment, the first gasket 120 and the second gasket 130 in the present invention are both made of nylon, specifically, a nylon anti-loosening gasket (or nylon locking gasket) is usually used between the bolt 140 and the nut to prevent the nut from loosening. It is a gasket made of nylon or other high-strength plastic materials, usually designed to provide additional friction between the contact surface of the nut and the bolt 140, and its main function is to prevent the nut from loosening due to vibration or impact by increasing friction. For example, the first gasket 120 is located between the bottom of the second anti-loosening sleeve 240 and the connected part, and the first gasket 120 can form additional friction between the connected part and the bottom of the second anti-loosening sleeve 240, so that when the connected part vibrates, it can effectively resist the rotation of the bottom of the second anti-loosening sleeve 240, so that when the nut body 100 rotates relative to the bolt 140 and drives the first anti-loosening sleeve 200 to rotate, the second anti-loosening sleeve 240 can be stationary relative to the connected part, thereby avoiding loosening.

[0039] In a further embodiment, the outer periphery of the first anti-loosening sleeve 200 of the present invention has a first hexagonal surface 220, such as Figure 8 As shown, the first hexagonal surface 220 is located at the upper end of the first anti-loosening sleeve 200. The setting of the first hexagonal surface 220 can facilitate the operator to thread the first anti-loosening sleeve 200 onto the second anti-loosening sleeve 240, and the first hexagonal surface 220 of the present invention and the hexagonal surface of the outer periphery of the nut body 100 have the same size, so that the operator can use a wrench of the same specification to complete the connection of the first anti-loosening sleeve 200 and the connection of the nut body 100 at the same time.

[0040] Specifically, the outer periphery of the second anti-loosening sleeve 240 in the present invention has a second hexagonal surface 260, such as Figure 1 and Figure 5 As shown, the second hexagonal surface 260 on the outer periphery of the second anti-loosening sleeve 240 can facilitate the operator to spirally connect the second anti-loosening sleeve 240 to the first anti-loosening sleeve 200. At the same time, the second hexagonal surface 260 of the present invention and the hexagonal surface on the outer periphery of the nut body 100 are the same size, so that the operator can use a wrench of the same specification to complete the connection of the second anti-loosening sleeve 240 and the connection of the nut body 100 at the same time.

[0041] In a further embodiment, in order to ensure the anti-loosening effect of the first anti-loosening sleeve 200 and the second anti-loosening sleeve 240, the first anti-loosening sleeve 200, the second anti-loosening sleeve 240 and the conical tube 110 are made of the same material as the nut body 100, thereby avoiding the different hardnesses among the first anti-loosening sleeve 200, the second anti-loosening sleeve 240, the nut body 100, the conical tube 110 and the bolt 140 due to material problems.

[0042] The specific installation process of a locking nut provided by the present invention is described in combination with the above embodiments: The second gasket 130 is inserted on the bolt 140 and is located at the hexagonal head 150 of the bolt 140. The bolt 140 is inserted on the connected part (not shown in the figure), and then the first gasket 120 is inserted on the bolt 140. The first gasket 120 is located at the upper end of the connected part. The first anti-loosening sleeve 200 and the second anti-loosening sleeve 240 are threadedly connected with a wrench, and the two are threadedly connected in place. After the connection is in place, the first anti-loosening sleeve 200 and the second anti-loosening sleeve 240 are inserted on the bolt 140 so that the bottom end of the second anti-loosening sleeve 240 abuts against the first gasket 120. Finally, the bolt 140 is tightened. The female body 100 is threadedly connected to the bolt 140, and the nut body 100 is driven to rotate by a wrench. The nut body 100 gradually approaches the tapered surface 230 of the inner circumference of the first anti-loosening sleeve 200 on the bolt 140. When the tapered tube 110 at one end of the nut body 100 is tightly against the tapered surface 230 of the inner circumference of the first anti-loosening sleeve 200, if one of the first retaining grooves 310 on the inner circumference of the first anti-loosening sleeve 200 and the second retaining groove 320 on the nut body 100 are just aligned, the retaining plate 300 can be inserted to connect the first anti-loosening sleeve 200 and the nut body 100 together. If the first stop groove 310 on the inner circumference of the first anti-loosening sleeve 200 is not aligned with the second stop groove 320 on the nut body 100, a larger force is used to drive the second anti-loosening sleeve 240 to rotate to adjust the rotation of the first anti-loosening sleeve 200, so that one of the first stop grooves 310 inside the first anti-loosening sleeve 200 can be aligned with the second stop groove 320. After alignment, the stop plate 300 is inserted to connect the first anti-loosening sleeve 200 and the nut body 100.

[0043] In other embodiments, the stop plate 300 may not be used, and there is no need for a large force to drive the second anti-loosening sleeve 240 to rotate. It is only necessary to inject liquid glue into the first stop groove 310 and the second stop groove 320, and wait for the liquid glue to solidify to connect the first anti-loosening sleeve 200 and the nut body 100 together, thereby achieving the anti-loosening function.

[0044] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0045] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A locking nut, characterized in that: include: A nut body, one end of which is coaxially and fixedly provided with a conical tube, the large end of which is connected to the nut body; A first anti-loosening sleeve, wherein the first anti-loosening sleeve is located at the outer periphery of the tapered tube, and the inner periphery of the first anti-loosening sleeve has a tapered surface, and the tapered surface is adapted to the outer periphery of the tapered tube; A second anti-loosening sleeve, wherein the second anti-loosening sleeve is threadedly connected to the outer periphery of the first anti-loosening sleeve, and a thread pitch of the second anti-loosening sleeve is greater than a thread pitch of the nut body; The first anti-loosening sleeve and the second anti-loosening sleeve are threadedly connected and then pass through the bolt, the bottom of the second anti-loosening sleeve abuts against the connected member, the nut body is threadedly connected to the bolt and gradually approaches the first anti-loosening sleeve, and the outer periphery of the tapered tube gradually contacts the inner periphery of the first anti-loosening sleeve; A fixing assembly, wherein the fixing assembly is configured to fix the first anti-loosening sleeve and the nut body together after the outer periphery of the tapered tube contacts the inner periphery of the first anti-loosening sleeve; A gasket assembly, wherein the gasket assembly can increase the friction force at the bottom of the second anti-loosening sleeve.

2. The anti-loosening nut according to claim 1, characterized in that: The fixing assembly includes a stop plate, a first stop groove and a second stop groove. There are multiple first stop grooves and they are all opened on the inner circumference of the first anti-loosening sleeve. The multiple first stop grooves are arranged in a circular array on the inner circumference of the first anti-loosening sleeve and extend along the axial direction of the first anti-loosening sleeve. The second stop groove is opened on the outer circumference of the nut body. The stop plate can be located in the first stop groove and the second stop groove at the same time to clamp the first anti-loosening sleeve and the nut body.

3. The anti-loosening nut according to claim 2, characterized in that: The second retaining groove passes through the outer periphery of the nut body and the outer periphery of the tapered cylinder.

4. The anti-loosening nut according to claim 1, characterized in that: The gasket assembly includes a first gasket and a second gasket. The first gasket and the second gasket are both inserted into the bolt. The first gasket and the second gasket abut against upper and lower ends of the connected component respectively.

5. The anti-loosening nut according to claim 4, characterized in that: The first gasket and the second gasket are both made of nylon.

6. The anti-loosening nut according to claim 1, characterized in that: The outer periphery of the first anti-loosening sleeve has a first hexagonal surface, and the first hexagonal surface has the same size as the hexagonal surface of the outer periphery of the nut body.

7. The anti-loosening nut according to claim 1, characterized in that: The outer periphery of the second anti-loosening sleeve has a second hexagonal surface, and the second hexagonal surface has the same size as the hexagonal surface of the outer periphery of the nut body.

8. The anti-loosening nut according to claim 1, characterized in that: The material of the first anti-loosening sleeve is the same as that of the nut body.

9. The anti-loosening nut according to claim 1, characterized in that: The material of the second anti-loosening sleeve is the same as that of the nut body.

10. The anti-loosening nut according to claim 1, characterized in that: The material of the conical tube is the same as that of the nut body.

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