Long-acting lock nut, lock bolt and machining method

Abstract

The long-acting lock nut comprises a nut body, the nut body is provided with a screw hole, the screw hole at least comprises a first screw hole section and a second screw hole section in the length direction, the central axis of the first screw hole section and the central axis of the second screw hole section are eccentrically arranged, and the first screw hole section and the second screw hole section are arranged in a staggered mode. The internal thread of the first screw hole section and the internal thread of the second screw hole section are in continuous transition; the bolt body is provided with a bolt head and a stud arranged on the bolt head, the stud at least comprises a first stud section and a second stud section in the length direction, the central axis of the first stud section and the central axis of the second stud section are eccentrically arranged, and an external thread of the first stud section and an external thread of the second stud section are in continuous transition; the design is not prone to clamping rotation, convenient and stable to use and firm in connection.

Description

Technical Field

[0001] The invention relates to the technical field of connection accessories, and in particular to a long-acting anti-loosening nut, an anti-loosening bolt and a processing method thereof. Background Art

[0002] The anti-loosening nut assembly can effectively prevent loosening during the connection process. Its firm connection characteristics are recognized by users, so it is widely used in infrastructure, aerospace and other fields.

[0003] Previous anti-loosening nut assemblies usually require at least a first nut and a second nut. After the first nut and the second nut are connected to the bolt, the eccentric structure between the first nut and the second nut will cause radial pressure on the first nut and the second nut. The threads of the first nut and the second nut can be tightly pressed against the threads of the stud and are not easy to loosen. However, during the assembly process, the first nut and the second nut need to cooperate to achieve the anti-loosening effect. On the one hand, the production cost of the two nuts is relatively high, and on the other hand, some narrow spaces are not convenient for installing the two nuts.

[0004] Therefore, some manufacturers consider how to achieve the anti-loosening effect on a nut part. There is an existing anti-loosening nut, which forms a first thread and a second thread that are not concentric with each other by tapping the two ends of the through hole respectively. When the bolt is connected to the first thread and the second thread respectively, the anti-loosening effect can be achieved. However, since the anti-loosening nut is tapped to form the first thread and the second thread, a back-off groove must be bored between the first thread and the second thread. This structure not only weakens the mechanical properties of the nut, but also causes the ends of the first thread and the second thread that are close to each other to produce a step portion of eccentricity. If the eccentricity is not large enough, the nut cannot achieve the effect of not loosening, and if the eccentricity is large enough, it will prevent the stud from continuing to be screwed into the second threaded hole. During use, the user often cannot screw the bolt into the second thread or the first thread after screwing it into the first thread or the second thread, resulting in poor use effect and failure to meet user needs. Summary of the invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a long-lasting anti-loosening nut, an anti-loosening bolt and a processing method, which are firmly connected, easy to use and stable.

[0006] According to the first aspect of the present invention, a long-lasting anti-loosening nut comprises a nut body, the nut body is provided with a screw hole, the screw hole comprises at least a first screw hole section and a second screw hole section along the length direction, wherein the central axis of the first screw hole section and the central axis of the second screw hole section are eccentrically arranged, and the internal thread of the first screw hole section and the internal thread of the second screw hole section are continuously transitioned.

[0007] A long-lasting anti-loosening nut according to an embodiment of the present invention has at least the following beneficial effects:

[0008] The long-lasting anti-loosening nut of the present invention has a function of preventing the nut body from being loosened when the nut body is connected to the bolt. Since the central axis of the first screw hole section and the central axis of the second screw hole section are eccentrically arranged, the screw teeth of the first screw hole section and the screw teeth of the second screw hole section cooperate with each other to form radial extrusion on the bolt, thereby achieving the purpose of preventing loosening. The internal thread of the first screw hole section and the internal thread of the second screw hole section have a continuous transition. After the bolt is screwed into the first screw hole section, it can smoothly enter the second screw hole section from the tail end of the first screw hole section, and it is not easy to get stuck. It is convenient and stable to use, and the connection is firm.

[0009] According to some embodiments of the present invention, the central axis of the first screw hole segment and the central axis of the second screw hole segment have an inclination angle so that the central axis of the first screw hole segment and the central axis of the second screw hole segment are eccentrically arranged.

[0010] According to some embodiments of the present invention, the inclination angle is less than 45°.

[0011] According to some embodiments of the present invention, the central axis of the first screw hole segment and the central axis of the second screw hole segment are spaced apart in the radial direction, a transition hole segment is arranged between the first screw hole segment and the second screw hole segment, one end of the transition hole segment is docked with the first screw hole segment, and the other end of the transition hole segment is docked with the second screw hole segment, and the internal thread of the first screw hole segment and the internal thread of the second screw hole segment are continuously transitionally docked with the inner wall of the transition hole segment.

[0012] According to some embodiments of the present invention, when the anti-loosening nut is assembled on the matching bolt, the stud of the matching bolt passes through the first screw hole section and the second screw hole section in sequence, wherein the stud of the matching bolt and the first screw hole section are concentrically arranged.

[0013] According to the second aspect of the present invention, the anti-loosening bolt comprises a bolt body, the bolt body is provided with a bolt head and a stud arranged on the bolt head, the stud comprises at least a first stud section and a second stud section along the length direction, wherein the central axis of the first stud section and the central axis of the second stud section are eccentrically arranged, and the external thread of the first stud section and the external thread of the second stud section are continuously transitioned.

[0014] The anti-loosening bolt according to the embodiment of the present invention has at least the following beneficial effects:

[0015] The anti-loosening bolt of the present invention, when the bolt body is connected to the screw hole of the assembly part, due to the eccentric arrangement of the central axis of the first stud section and the central axis of the second stud section, the screw teeth of the first stud section and the screw teeth of the second stud section cooperate with each other to form radial extrusion on the screw hole of the assembly part, thereby achieving the purpose of anti-loosening, and the external thread of the first stud section and the external thread of the second stud section are continuously transitioned, the first stud section of the anti-loosening bolt is screwed into the screw hole of the assembly part, and the second stud section at the tail end of the first stud section can also be screwed into the screw hole of the assembly part, which is not easy to get stuck, is convenient and stable to use, and has a firm connection.

[0016] According to some embodiments of the present invention, the central axis of the first stud segment and the central axis of the second stud segment are spaced apart in the radial direction and are parallel to each other, and a transition stud segment is provided between the first stud segment and the second stud segment so that the central axis of the first stud segment and the central axis of the second stud segment are eccentrically arranged.

[0017] According to a processing method of an embodiment of the third aspect of the present invention, for processing the long-lasting anti-loosening nut disclosed in any of the above embodiments, the processing method comprises: a prefabricated through hole is opened through the nut member; a cutter head of a lathe device enters from the head end of the prefabricated through hole and advances along the length direction of the prefabricated through hole to process the inner wall of the prefabricated through hole, when the cutter head advances to a length threshold, a servo mechanism of the lathe device drives the cutter head to move eccentrically relative to the central axis of the prefabricated through hole and synchronously advances along the length direction of the prefabricated through hole, so that the prefabricated through hole is processed into an eccentric through hole, wherein the eccentric through hole at least includes a first A through hole section and a second through hole section, the center axis of the first through hole section and the center axis of the second through hole section are eccentrically arranged; a tool head of a lathe device enters from the head end of the eccentric through hole and advances along the length direction of the eccentric through hole, and the tool head of the lathe device threads the inner wall of the first through hole section to process the internal thread of the first screw hole section; when the tool head advances to a length threshold, the servo mechanism of the lathe device drives the tool head to move eccentrically relative to the center axis of the first through hole section and synchronously advances along the length direction of the eccentric through hole, and the tool head of the lathe device threads the inner wall of the second through hole section to process the internal thread of the second screw hole section.

[0018] The processing method according to the embodiment of the present invention has at least the following beneficial effects:

[0019] The processing method of the present invention uses a CNC lathe to control the cutter head to directly extend from one end of the prefabricated through hole and advance along the length direction of the prefabricated through hole. This is different from the tapping processing method. The tapping processing method is to directly use a threaded tool to penetrate the nut part, and it is impossible to simply extend from one end of the nut part to process the eccentric structure. The lathe device is different. The cutter head of the lathe device processes the inner wall of the prefabricated through hole, and the cutter head will not fill the entire prefabricated through hole. When the length threshold is reached, the servo mechanism of the lathe device drives the cutter head relative to the length of the prefabricated through hole. The center axis moves eccentrically and synchronously advances along the length direction of the prefabricated through hole, so that the prefabricated through hole is processed into an eccentric through hole, and then the inner wall of the prefabricated through hole is threaded by the tool head of the lathe device to form the internal thread of the first screw hole section and the internal thread of the second screw hole section. Moreover, since the tool head of the lathe device moves continuously from the head end to the tail end of the eccentric through hole, the internal thread of the first screw hole section and the internal thread of the second screw hole section are continuously transitioned. The design is simple to process, and makes the internal thread of the eccentric through hole smooth and continuous, and the installation is convenient and stable.

[0020] According to some embodiments of the present invention, the processing method also includes: a lathe device controls the rotation of the cutter head according to a preset threaded hole diameter to process the internal thread of the first screw hole segment; when the cutter head advances to a length threshold, the lathe device keeps the threaded hole diameter unchanged, and controls the rotation axis of the cutter head to radially deviate from the center axis of the prefabricated through hole to process the internal thread of the second screw hole segment.

[0021] According to some embodiments of the present invention, the lathe device keeps the threaded hole diameter unchanged, controls the rotation axis of the tool head to radially deviate from the central axis of the prefabricated through hole to process the internal thread of the second screw hole segment, including obtaining the rotation angle of the tool head, and the lathe device cyclically executes the eccentric step to control the tool head to process the internal thread of the second screw hole segment; the eccentric step includes: when the rotation angle of the tool head reaches a first radial direction, controls the rotation axis of the tool head to move an eccentric stroke along a second radial direction away from the central axis of the prefabricated through hole, wherein the first radial direction and the second radial direction are perpendicular.

[0022] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0024] Figure 1 A top view of one embodiment of a locking nut of the present invention;

[0025] Figure 2 It is a cross-sectional schematic diagram of the eccentric through hole of the first embodiment of the anti-loosening nut of the present invention before thread cutting;

[0026] Figure 3 It is a cross-sectional schematic diagram of the eccentric through hole before thread cutting of the second embodiment of the anti-loosening nut of the present invention;

[0027] Figure 4 A cross-sectional view of one embodiment of a locking nut of the present invention;

[0028] Figure 5 A cross-sectional view of an assembly state of one embodiment of a locking nut of the present invention;

[0029] Figure 6 A cross-sectional view of one embodiment of the anti-loosening bolt of the present invention before thread cutting;

[0030] Figure 7 It is a cross-sectional schematic diagram of a finished product state of one embodiment of the anti-loosening bolt of the present invention;

[0031] Figure 8 It is a processing schematic diagram of one embodiment of the anti-loosening nut of the present invention.

[0032] Reference numerals:

[0033] Nut body 100; first screw hole section 110; second screw hole section 120; first through hole section 130; second through hole section 140; transition hole section 150; matching bolt 200; bolt body 300; bolt head 310; first stud section 320; second stud section 330; cutter head 400. DETAILED DESCRIPTION

[0034] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside” and “outside” are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0036] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figures 1 to 7 As shown, a long-lasting anti-loosening nut according to an embodiment of the first aspect of the present invention includes a nut body 100, and the nut body 100 is provided with a screw hole, and the screw hole includes at least a first screw hole section 110 and a second screw hole section 120 along the length direction, wherein the central axis of the first screw hole section 110 and the central axis of the second screw hole section 120 are eccentrically arranged, and the internal thread of the first screw hole section 110 and the internal thread of the second screw hole section 120 are continuously transitioned.

[0039] Among them, Figure 1 As shown, the nut body 100 can be made of alloy material, and the outer contour of the nut body 100 can be hexagonal, wherein the central axis of the first screw hole section 110 can be concentrically arranged with the nut body 100, and the second screw hole section 120 is eccentric relative to the first screw hole section 110.

[0040] According to the anti-loosening nut of the present invention, when the nut body 100 is connected to the bolt, due to the eccentric arrangement of the central axis of the first screw hole section 110 and the central axis of the second screw hole section 120, the screw teeth of the first screw hole section 110 and the screw teeth of the second screw hole section 120 cooperate with each other to form radial extrusion on the bolt, thereby achieving the purpose of preventing loosening, and the internal thread of the first screw hole section 110 and the internal thread of the second screw hole section 120 have a continuous transition. After the bolt is screwed into the first screw hole section 110, it can smoothly enter the second screw hole section 120 from the tail end of the first screw hole section 110, and it is not easy to get stuck. It is convenient and stable to use and has a firm connection.

[0041] In some embodiments of the present invention, Figure 2As shown, the central axis of the first screw hole segment 110 and the central axis of the second screw hole segment 120 have an inclination angle a so that the central axis of the first screw hole segment 110 and the central axis of the second screw hole segment 120 are eccentrically arranged.

[0042] When the matching bolt 200 is screwed into the first screw hole section 110 and the second screw hole section 120, since the central axis of the second screw hole section 120 is inclined relative to the central axis of the first screw hole section 110, the inner wall of the first side of the second screw hole section 120 will press against the outer wall surface of the first side of the matching bolt 200, thereby causing the outer wall of the second side of the bolt to press against the inner wall of the second side of the first screw hole section 110, thereby causing radial pressure to be generated between the threads of the second screw hole section 120 and the threads of the bolt, and between the threads of the first screw hole section 110 and the threads of the bolt. When an axial force is applied from the outside, sufficient friction can be formed by the radial pressure, and the bolt is not easy to rotate and loosen. Figure 5 shown.

[0043] Specifically, the inclination angle a is less than 45°, and the manufacturer adjusts the inclination angle a according to the depth of the screw hole.

[0044] In some embodiments of the present invention, Figure 3 As shown, the central axis of the first screw hole segment 110 and the central axis of the second screw hole segment 120 have a radial spacing b, and a transition hole segment 150 is arranged between the first screw hole segment 110 and the second screw hole segment 120, one end of the transition hole segment 150 is connected to the first screw hole segment 110, and the other end of the transition hole segment 150 is connected to the second screw hole segment 120, and the internal thread of the first screw hole segment 110 and the internal thread of the second screw hole segment 120 are connected to the inner wall of the transition hole segment 150 to achieve continuous transition connection.

[0045] Among them, the central axis of the first screw hole section 110 and the central axis of the second screw hole section 120 are parallel to each other, but the central axis of the first screw hole section 110 and the central axis of the second screw hole section 120 are spaced apart in the radial direction, and the transition hole section 150 is inclined relative to the central axis of the first screw hole section 110 and the central axis of the second screw hole section 120, so that one end of the transition hole section 150 is connected to the first screw hole section 110, and the other end of the transition hole section 150 is connected to the second screw hole section 120.

[0046] Similarly, when the matching bolt 200 is screwed into the first screw hole section 110 and the second screw hole section 120, the inner wall of the first side of the second screw hole section 120 will press against the outer wall surface of the first side of the matching bolt 200, thereby causing the outer wall of the second side of the bolt to press against the inner wall of the second side of the first screw hole section 110, so that radial pressure is generated between the thread of the second screw hole section 120 and the thread of the bolt, and between the thread of the first screw hole section 110 and the thread of the bolt. When an axial force is applied from the outside, sufficient friction can be formed by the radial pressure, and the bolt is not easy to rotate and loosen. Figure 5 shown.

[0047] In some embodiments of the present invention, Figure 5 As shown, when the anti-loosening nut is assembled on the matching bolt 200, the stud of the matching bolt 200 passes through the first screw hole section 110 and the second screw hole section 120 in sequence, wherein the stud of the matching bolt 200 and the first screw hole section 110 are concentrically arranged.

[0048] The mating bolt 200 first passes through the first screw hole section 110. Since the stud of the mating bolt 200 and the first screw hole section 110 are concentrically arranged, it is easier to pass through. Then, when passing through the second screw hole section 120, the first side inner wall of the second screw hole section 120 presses against the first side outer wall of the mating bolt 200, and the second side outer wall of the mating bolt 200 also presses against the second side inner wall of the first screw hole section 110, thereby locking.

[0049] According to the second aspect of the present invention, the anti-loosening bolt of the embodiment is as follows: Figure 6 , 7 As shown, it includes a bolt body 300, which is provided with a bolt head 310 and a stud arranged on the bolt head 310, and the stud includes at least a first stud section 320 and a second stud section 330 along the length direction, wherein the central axis of the first stud section 320 and the central axis of the second stud section 330 are eccentrically arranged, and the external thread of the first stud section 320 and the external thread of the second stud section 330 are continuously transitioned.

[0050] The bolt body 300 can be made of conventional alloy materials, and the outer contour of the bolt head 310 can be hexagonal. The bolt body 300 can cooperate with the screw hole of the assembly part. When the bolt body 300 is screwed into the screw hole of the assembly part, the outer wall of the first side of the second stud section 330 will press against the inner wall surface of the first side of the screw hole of the assembly part, thereby making the inner wall surface of the second side of the screw hole of the assembly part press against the outer wall of the second side of the first stud section 320, so that radial pressure is generated between the thread of the second stud section 330 and the thread of the screw hole of the assembly part, and between the thread of the first stud section 320 and the thread of the screw hole of the assembly part. When an axial force is applied from the outside, sufficient friction can be formed by the radial pressure, and the bolt is not easy to rotate and loosen.

[0051] For the anti-loosening bolt of the present invention, when the bolt body 300 is connected to the screw hole of the assembly, since the central axis of the first stud section 320 and the central axis of the second stud section 330 are eccentrically arranged, the screw teeth of the first stud section 320 and the screw teeth of the second stud section 330 cooperate with each other to form radial extrusion on the screw hole of the assembly, thereby achieving the purpose of anti-loosening, and the external thread of the first stud section 320 and the external thread of the second stud section 330 are continuously transitioned. When the first stud section 320 of the anti-loosening bolt is screwed into the screw hole of the assembly, the second stud section 330 at the tail end of the first stud section 320 can also be screwed into the screw hole of the assembly, which is not easy to get stuck, is convenient and stable to use, and has a firm connection.

[0052] In some embodiments of the present invention, the central axis of the first stud segment 320 and the central axis of the second stud segment 330 are spaced apart in the radial direction and the central axis of the first stud segment 320 and the central axis of the second stud segment 330 are parallel to each other, and a transition stud segment is provided between the first stud segment 320 and the second stud segment 330 so that the central axis of the first stud segment 320 and the central axis of the second stud segment 330 are eccentrically arranged.

[0053] Specifically, the first stud segment 320 and the second stud segment 330 can both have multiple segments. The studs can be arranged in the order of the first stud segment 320, the second stud segment 330, and the first stud segment 320 along the direction away from the bolt head 310, or can be arranged in the order of the first stud segment 320, the second stud segment 330, the first stud segment 320, the second stud segment 330, and the first stud segment 320, and multiple first stud segments 320 and second stud segments 330 can be arranged by analogy.

[0054] A processing method according to an embodiment of the third aspect of the present invention is used to process the anti-loosening nut disclosed in any of the above embodiments, and the processing method includes:

[0055] A prefabricated through hole is formed through the nut member, wherein the prefabricated through hole has a relatively small diameter. It is understood that the projected area of ​​the prefabricated through hole is generally within the first through hole section 130 and the second through hole section 140. The prefabricated through hole is formed in advance for inserting a turning tool of a lathe device;

[0056] The tool head 400 of the lathe device enters from the head end of the prefabricated through hole and advances along the length direction of the prefabricated through hole to process the inner wall of the prefabricated through hole. When the tool head 400 advances to a length threshold, the servo mechanism of the lathe device drives the tool head 400 to move eccentrically relative to the central axis of the prefabricated through hole and advances along the length direction of the prefabricated through hole synchronously, so that the prefabricated through hole is processed into an eccentric through hole, wherein the eccentric through hole at least includes a first through hole segment 130 and a second through hole segment 140, and the central axis of the first through hole segment 130 and the central axis of the second through hole segment 140 are eccentrically arranged.

[0057] The tool head 400 of the lathe device enters from the head end of the eccentric through hole and moves along the length direction of the eccentric through hole, and the tool head 400 of the lathe device threads the inner wall of the first through hole section 130 to form the internal thread of the first screw hole section 110;

[0058] When the tool head 400 advances to a length threshold, the servo mechanism of the lathe device drives the tool head 400 to move eccentrically relative to the central axis of the first through hole section 130 and simultaneously advance along the length direction of the eccentric through hole. The tool head 400 of the lathe device threads the inner wall of the second through hole section 140 to machine the internal thread of the second screw hole section 120.

[0059] The processing method of the present invention uses a CNC lathe to control the cutter head 400 to directly extend from one end of the prefabricated through hole and advance along the length direction of the prefabricated through hole. This is different from the tapping processing method. The tapping processing method is to directly use a threaded tool to penetrate the nut member, and it is impossible to simply extend from one end of the nut member to process the eccentric structure. The lathe device is different. The cutter head 400 of the lathe device processes the inner wall of the prefabricated through hole. The cutter head 400 will not fill the entire prefabricated through hole. When the length threshold is reached, the servo mechanism of the lathe device drives the cutter head 400 relative to the central axis of the prefabricated through hole. The thread moves eccentrically and synchronously advances along the length direction of the prefabricated through hole, so that the prefabricated through hole is processed into an eccentric through hole, and then the inner wall of the prefabricated through hole is threaded by the tool head 400 of the lathe device to form the internal thread of the first screw hole section 110 and the internal thread of the second screw hole section 120. Moreover, since the tool head 400 of the lathe device moves continuously from the head end to the tail end of the eccentric through hole, the internal thread of the first screw hole section 110 and the internal thread of the second screw hole section 120 are continuously transitioned. The design is simple to process, and makes the internal thread of the eccentric through hole smooth and continuous, and the installation is convenient and stable.

[0060] In some embodiments of the present invention, the processing method further comprises:

[0061] The lathe device controls the cutter head 400 to rotate according to the preset threaded hole diameter to process the internal thread of the first screw hole section 110;

[0062] When the cutter head 400 advances to a length threshold, the lathe device keeps the threaded hole diameter unchanged and controls the rotation axis of the cutter head 400 to radially deviate from the central axis of the prefabricated through hole to process the internal thread of the second threaded hole section 120 .

[0063] Unlike the tapping device, which drives the thread cutter head 400 to rotate and penetrate the nut to form a threaded hole, the thread turning device drives the cutter head 400 to rotate in the prefabricated through hole, and the cutter head 400 is close to the inner wall of the prefabricated through hole, moving along the inner wall to turn out the internal thread.

[0064] When the length threshold is reached and the process changes from processing the first screw hole section 110 to processing the second screw hole section 120, the radius of the turning tool rotation is kept unchanged so that the threaded hole diameter remains unchanged, and the rotation axis of the tool head 400 is radially deviated from the central axis of the prefabricated through hole so that the second screw hole section 120 is eccentric relative to the first screw hole section 110.

[0065] When it is necessary to make the central axis of the first screw hole segment 110 and the central axis of the second screw hole segment 120 have an inclination angle a, in some embodiments of the present invention, the lathe device keeps the threaded hole diameter unchanged, controls the rotation axis of the cutter head 400 to radially deviate from the central axis of the prefabricated through hole to process the internal thread of the second screw hole segment 120, including obtaining the rotation angle of the cutter head 400, and the lathe device cyclically executes the eccentric step to control the cutter head 400 to process the internal thread of the second screw hole segment 120; the eccentric step includes: when the rotation angle of the cutter head 400 reaches the first radial direction x, controls the rotation axis of the cutter head 400 to move an eccentric stroke along the second radial direction y away from the central axis of the prefabricated through hole, wherein the first radial direction x and the second radial direction y are perpendicular, and each time the rotation angle of the cutter head 400 reaches the first radial direction x, the eccentric stroke is moved until the second screw hole segment 120 is processed.

[0066] by Figure 8 For example, the rotating shaft of the cutter head 400 moves an eccentric stroke along the second radial direction y away from the central axis of the prefabricated through hole, thereby gradually forming a second screw hole section 120 inclined to the first screw hole section 110. The lathe device controls the cutter head 400 to move the eccentric stroke, which should be executed when the rotation angle of the cutter head 400 is located in the first radial direction x. At this moment, when the servo mechanism drives the rotating shaft of the cutter head 400 to move radially, the cutter head 400 is not easy to be pressed against the inner wall of the nut part, and the tool is not easy to get stuck, and the internal thread processing is also smoother. Specifically, the eccentric stroke can be set according to the manufacturer's requirements for the inclination angle a between the central axis of the first screw hole section 110 and the central axis of the second screw hole section 120.

[0067] It can be understood that when the tool head 400 advances to the length threshold, the servo mechanism of the lathe device drives the tool head 400 to move eccentrically relative to the central axis of the prefabricated through hole and simultaneously advances along the length direction of the prefabricated through hole, so that the prefabricated through hole is processed into an eccentric through hole. It is also necessary to obtain the rotation angle of the tool head 400, and then the eccentric step is also performed. When the rotation angle of the tool head 400 reaches the first radial direction x, the rotation axis of the tool head 400 is controlled to move an eccentric stroke along the second radial direction y away from the central axis of the prefabricated through hole. Then, each time the rotation angle of the tool head 400 reaches the first radial direction x, the eccentric stroke is moved until the second through hole section 140 is processed. This method also makes the inner wall of the second through hole section 140 smoother and more fluent.

[0068] When processing the nut, the eccentric step is firstly cyclically performed to process the second through hole section 140 , and then the eccentric step is used to drive the cutter head 400 to turn the thread on the inner wall of the second through hole section 140 to form the second screw hole section 120 .

[0069] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0070] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A long-lasting anti-loosening nut, characterized in that: It includes a nut body, which is provided with a screw hole. The screw hole includes at least a first screw hole section and a second screw hole section along the length direction, wherein the central axis of the first screw hole section and the central axis of the second screw hole section are eccentrically arranged, and the internal thread of the first screw hole section and the internal thread of the second screw hole section are continuously transitioned.

2. A long-lasting anti-loosening nut according to claim 1, characterized in that: The central axis of the first screw hole segment and the central axis of the second screw hole segment have an inclination angle so that the central axis of the first screw hole segment and the central axis of the second screw hole segment are eccentrically arranged.

3. A long-lasting anti-loosening nut according to claim 2, characterized in that: The inclination angle is less than 45°.

4. The long-lasting anti-loosening nut according to claim 1, characterized in that: The central axis of the first screw hole segment and the central axis of the second screw hole segment are spaced apart in the radial direction, and a transition hole segment is arranged between the first screw hole segment and the second screw hole segment, one end of the transition hole segment is docked with the first screw hole segment, and the other end of the transition hole segment is docked with the second screw hole segment, and the internal thread of the first screw hole segment and the internal thread of the second screw hole segment are continuously transitionally docked with the inner wall of the transition hole segment.

5. The long-lasting anti-loosening nut according to claim 1, characterized in that: When the anti-loosening nut is assembled on the matching bolt, the stud of the matching bolt passes through the first screw hole section and the second screw hole section in sequence, wherein the stud of the matching bolt and the first screw hole section are concentrically arranged.

6. A locking bolt, characterized in that: It includes a bolt body, which is provided with a bolt head and a stud arranged on the bolt head, and the stud includes at least a first stud section and a second stud section along the length direction, wherein the central axis of the first stud section and the central axis of the second stud section are eccentrically arranged, and the external thread of the first stud section and the external thread of the second stud section are continuously transitioned.

7. The anti-loosening bolt according to claim 6, characterized in that: The central axis of the first stud segment and the central axis of the second stud segment are spaced apart in radial direction and are parallel to each other, and a transition segment is arranged between the first stud segment and the second stud segment so that the central axis of the first stud segment and the central axis of the second stud segment are eccentrically arranged.

8. A processing method for processing the long-acting locking nut according to any one of claims 1 to 4, characterized in that: The processing method comprises: A prefabricated through hole is formed through the nut member; A tool head of a lathe device enters from the head end of the prefabricated through hole and advances along the length direction of the prefabricated through hole to process the inner wall of the prefabricated through hole. When the tool head advances to a length threshold, a servo mechanism of the lathe device drives the tool head to move eccentrically relative to the central axis of the prefabricated through hole and advances along the length direction of the prefabricated through hole synchronously, so that the prefabricated through hole is processed into an eccentric through hole, wherein the eccentric through hole at least includes a first through hole segment and a second through hole segment, and the central axis of the first through hole segment and the central axis of the second through hole segment are eccentrically arranged; The tool head of the lathe device enters from the head end of the eccentric through hole and moves along the length direction of the eccentric through hole, and the tool head of the lathe device performs thread turning on the inner wall of the first through hole section to form an internal thread of the first screw hole section; When the tool head advances to a length threshold, the servo mechanism of the lathe device drives the tool head to move eccentrically relative to the central axis of the first through hole segment and synchronously advance along the length direction of the eccentric through hole. The tool head of the lathe device threads the inner wall of the second through hole segment to machine the internal thread of the second screw hole segment.

9. A processing method according to claim 8, characterized in that: Also includes: The lathe device controls the rotation of the cutter head according to the preset threaded hole diameter to process the internal thread of the first screw hole section; When the cutter head advances to a length threshold, the lathe device keeps the threaded hole diameter unchanged and controls the rotating axis of the cutter head to radially deviate from the central axis of the prefabricated through hole to process the internal thread of the second screw hole section.

10. A processing method according to claim 9, characterized in that: The lathe device keeps the threaded hole diameter unchanged, controls the rotation axis of the cutter head to radially deviate from the central axis of the prefabricated through hole to process the internal thread of the second screw hole segment, including obtaining the rotation angle of the cutter head, and the lathe device cyclically executes the eccentric step to control the cutter head to process the internal thread of the second screw hole segment; The eccentricity step comprises: When the rotation angle of the cutter head reaches a first radial direction, the rotation axis of the cutter head is controlled to move an eccentric stroke along a second radial direction away from the central axis of the prefabricated through hole, wherein the first radial direction is perpendicular to the second radial direction.

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