Bolt and nut assemblies

Abstract

The embodiment of the present invention proposes a bolt and nut assembly, which relates to the field of mechanical fastening technology. The bolt and nut assembly includes a bolt body, a fastener, a first locking nut and a second locking nut. The bolt body includes a main threaded rod and a secondary threaded rod; the threaded hole of the second locking nut is threadedly matched with the thread of the main threaded rod; the fastener is recessed with a reserved groove, and a through avoidance hole is opened at the bottom of the reserved groove. The secondary threaded rod passes through and extends out of the avoidance hole, and the end face of the fastener at the opening of the reserved groove abuts against the second locking nut, and the reserved groove is in a hollow state; the threaded hole of the first locking nut is threadedly matched with the thread of the secondary threaded rod. The fastener is locked between the second locking nut and the first locking nut, and when the locking member is squeezed, the locking member rebounds strongly elastically, so as to force the bolt body, the second locking nut, the fastener, and the first locking nut to be connected into a more stable overall structure, thereby achieving a technical effect of preventing loosening.

Description

Technical Field

[0001] The embodiments of the present invention relate to the technical field of mechanical fastening, and in particular, to a bolt and nut assembly. Background Art

[0002] Bolts and nuts are mechanical parts. Bolts and nuts can be used to fix multiple parts together. This type of connection is called bolt connection.

[0003] Bolt connections are widely used in machinery and equipment. However, when the bolt and nut assembly in the prior art is assembled on a machine, the bolts and nuts are prone to loosening during the long-term operation of the machine, making the parts on the machine unstable. Summary of the invention

[0004] The embodiment of the present invention aims to provide a bolt and nut assembly, which can solve the technical problem in the prior art that the bolt and nut assembly is prone to loosening during use.

[0005] The embodiment of the present invention adopts the following technical solutions:

[0006] A bolt and nut assembly, comprising:

[0007] A bolt body, the bolt body comprising a main threaded rod and a secondary threaded rod, a thread is arranged on the outer side of the main threaded rod, the secondary threaded rod extends outwardly from one end of the main threaded rod, and a thread is arranged on the outer side of the secondary threaded rod;

[0008] A first locking nut, wherein the first locking nut is provided with a threaded hole;

[0009] A second locking nut, wherein the second locking nut is provided with a threaded hole, and the threaded hole of the second locking nut is threadably matched with the thread located on the main threaded rod;

[0010] A fastener, wherein the fastener is concavely provided with a reserved groove, a through avoidance hole is opened at the bottom of the reserved groove, the opening of the reserved groove faces the second locking nut, the secondary threaded rod passes through and extends out of the avoidance hole, and the end face of the fastener at the opening of the reserved groove abuts against the second locking nut, and the reserved groove is in a hollow state:

[0011] Wherein, the threaded hole of the first locking nut is threadably matched with the thread located on the secondary threaded rod.

[0012] Optionally, the main threaded rod is cylindrical, has threads extending helically along the length direction of the main threaded rod, and the secondary threaded rod extends outward at one end in the length direction of the threaded rod; the secondary threaded rod is cylindrical, has threads extending helically along the length direction of the secondary threaded rod.

[0013] Optionally, a bolt cap is extended from one end of the main threaded rod away from the secondary threaded rod, and the bolt cap, the main threaded rod and the secondary threaded rod are integrally formed.

[0014] Optionally, the helical direction of the thread located on the primary threaded rod is opposite to the helical direction of the thread located on the secondary threaded rod.

[0015] Optionally, the pitch of the thread located on the primary threaded rod is different from the pitch of the thread located on the secondary threaded rod.

[0016] Optionally, the fastener is a cover-shaped structure, and the reserved groove is recessed along the length direction of the fastener from one end surface of the fastener.

[0017] Optionally, a thread is provided at the opening of the reserved groove, an annular boss is protruding from one side of the second locking nut, a thread is provided on the outer surface of the annular boss, and the thread located on the annular boss is threadedly connected with the thread located at the opening of the reserved groove.

[0018] Optionally, the thread diameter of the secondary threaded rod is smaller than the thread diameter of the primary threaded rod, the aperture of the avoidance hole is larger than the thread diameter of the secondary threaded rod, and the aperture of the avoidance hole is smaller than the thread diameter of the primary threaded rod.

[0019] Optionally, the first locking nut is provided with one or more through holes, and correspondingly, the fastener is provided with locking holes corresponding to the positions of the one or more through holes; the bolt and nut assembly also includes one or more fastening screws, which pass through the through holes and are threadedly connected with the locking holes.

[0020] Optionally, the bolt and nut assembly also includes a first tightening nut and a second tightening nut; the first tightening nut is threadedly connected to the main threaded rod, the outer surface of the second locking nut is provided with a thread, the second tightening nut is threadedly connected to the outer surface of the second locking nut, and the first tightening nut and the second tightening nut are abutted and fixed.

[0021] Compared with the prior art, in the bolt and nut assembly of the present embodiment, the bolt body includes a main threaded rod and a secondary threaded rod which are integrally arranged. The threaded hole of the second locking nut is threadedly matched with the thread located on the main threaded rod, the opening of the reserved groove faces the second locking nut, the secondary threaded rod passes through and extends out of the avoidance hole, and the end face of the fastener at the opening of the reserved groove abuts against the second locking nut, the reserved groove is in a hollow state, and the threaded hole of the first locking nut is threadedly matched with the thread located on the secondary threaded rod. In this way, the fastener is locked between the second locking nut and the first locking nut, the reserved groove located in the fastener is in a hollow state, and when the locking member is squeezed, the locking member rebounds strongly elastically to force the bolt body, the second locking nut, the fastener, and the first locking nut to be connected into a more stable overall structure, thereby achieving the technical effect of preventing loosening. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0023] Figure 1 It is a structural schematic diagram of a bolt and nut assembly provided by one embodiment of the present invention;

[0024] Figure 2 is a structural schematic diagram of a bolt and nut assembly provided by another embodiment of the present invention;

[0025] Figure 3 yes Figure 2 A schematic structural diagram of the first locking nut shown;

[0026] Figure 4 It is a structural schematic diagram of a bolt and nut assembly provided by another embodiment of the present invention. DETAILED DESCRIPTION

[0027] In order to facilitate the understanding of the present invention, the present invention is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or there can be one or more centered elements therebetween. When an element is described as "connected" to another element, it can be directly connected to another element or there can be one or more centered elements therebetween. The orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "vertical", "horizontal", etc. used in this specification is based on the orientation or positional relationship shown in the accompanying drawings, 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 of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0028] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0029] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0030] See also Figure 1-4 One embodiment of the present invention provides an anti-loosening bolt and nut assembly 100, wherein the various components of the bolt and nut assembly 100 are matched and connected so that the bolt and nut assembly 100 has strong stability.

[0031] See also Figure 1The bolt and nut assembly 100 includes a bolt body 10, a fastener 20, a first locking nut 30 and a second locking nut 40. The bolt body 10 is made of metal, and includes a main threaded rod 11 and a secondary threaded rod 12, wherein the main threaded rod 11 is cylindrical, and a thread extending spirally along the length direction of the main threaded rod 11 is arranged on the outside of the main threaded rod 11, and the secondary threaded rod 12 extends outward from one end in the length direction of the threaded rod. The secondary threaded rod 12 is cylindrical, and a thread extending spirally along the length direction of the secondary threaded rod 12 is arranged on the outside of the secondary threaded rod 12, wherein the thread diameter of the secondary threaded rod 12 is smaller than the thread diameter of the main threaded rod 11. Furthermore, a bolt cap 13 is extended from one end of the main threaded rod 11 away from the secondary threaded rod 12, for example, the bolt body 10 is a hexagonal bolt, that is, the cross-section of the bolt cap 13 is a regular hexagon. Optionally, the bolt cap 13, the primary threaded rod 11 and the secondary threaded rod 12 are integrally formed and can be cast in one step through a casting process.

[0032] The spiral direction of the thread of the main threaded rod 11 is opposite to the spiral direction of the thread of the secondary threaded rod 12. And / or the pitch of the thread of the main threaded rod 11 is different from the pitch of the thread of the secondary threaded rod 12, for example, the pitch of the thread of the main threaded rod 11 is greater than the pitch of the thread of the secondary threaded rod 12, or the pitch of the thread of the main threaded rod 11 is less than the pitch of the thread of the secondary threaded rod 12.

[0033] In other embodiments, the spiral direction of the thread of the main threaded rod 11 is opposite to the spiral direction of the thread of the secondary threaded rod 12, and the pitch of the thread of the main threaded rod 11 is the same as the pitch of the thread of the secondary threaded rod 12; or, the spiral direction of the thread of the main threaded rod 11 is the same as the spiral direction of the thread of the secondary threaded rod 12, and the pitch of the thread of the main threaded rod 11 is different from the pitch of the thread of the secondary threaded rod 12.

[0034] In this embodiment, the second locking nut 40 is made of metal, and a threaded hole is formed in the second locking nut 40. Optionally, a through threaded hole is formed in the middle of the second locking nut 40. The threaded hole of the second locking nut 40 is threadably connected with the thread on the main threaded rod 11, so that the second locking nut 40 is inserted into the main threaded rod 11.

[0035] The fastener 20 is made of metal, and is in a cover-like structure. The outer contour of the fastener 20 is a regular geometric figure, for example, the cross section of the fastener 20 is a regular hexagon or a circle. A reserved groove 21 is recessed from one end face of the fastener 20 along the length direction of the fastener 20, the opening of the reserved groove 21 faces the second locking nut 40, and the end face of the fastener 20 at the opening of the reserved groove 21 abuts against the second locking nut 40, and the reserved groove 21 is in a hollow state. In this embodiment, the reserved groove 21 is cylindrical, and a thread is provided at the opening of the reserved groove 21. An annular boss 41 is convexly provided on one side of the second locking nut 40, and a thread is provided on the outer surface of the annular boss 41. The thread located at the annular boss 41 is threadedly matched with the thread located at the opening of the reserved groove 21. A through avoidance hole 22 is opened at the bottom of the reserved groove 21, and the aperture of the avoidance hole 22 is larger than the thread diameter of the secondary threaded rod 12, and the aperture of the avoidance hole 22 is smaller than the thread diameter of the main threaded rod 11, so that the secondary threaded rod 12 can pass through the avoidance hole 22, and the avoidance hole 22 can prevent the main threaded rod 11 from passing through, so that the fastener 20 can clamp the bolt body 10 and move further toward the side of the secondary threaded rod 12, wherein the end face of the main threaded rod 11 abuts against the bottom of the reserved groove 21.

[0036] In some other embodiments, the avoidance hole 22 is provided with threads, and the avoidance hole 22 is threadedly connected to the secondary threaded rod 12 .

[0037] The first locking nut 30 is made of metal and has a threaded hole. The threaded hole of the first locking nut 30 is threadedly connected with the thread located on the secondary threaded rod 12. The second locking nut 40 is screwed into the main threaded rod 11, and the secondary threaded rod 12 passes through and extends out of the avoidance hole 22. The thread at the opening of the reserved groove 21 is threadedly connected with the thread of the annular boss 41, and the fastener 20 abuts against the second locking nut 40. The first locking nut 30 is screwed into the secondary threaded rod 12, so that the bolt body 10, the second locking nut 40, the fastener 20, and the first locking nut 30 are connected into an integral structure, so that the bolt and nut assembly 100 has strong stability and achieves the technical effect of preventing loosening.

[0038] For further information, see Figure 2-3, the first locking nut 30 is provided with one or more through holes 31, and correspondingly, the fastener 20 is provided with locking holes 23 corresponding to the positions of the one or more through holes 31. The bolt and nut assembly 100 further includes one or more fastening screws 50, which pass through the through holes 31 and are threadedly connected with the locking holes 23 to enhance the firmness between the first locking nut 30 and the fastener 20. Optionally, the first locking nut 30 is a hexagonal nut, and a threaded hole threadedly connected with the secondary threaded rod 12 is provided in the middle of the first locking nut 30, and if there are multiple through holes 31, the multiple through holes 31 are evenly distributed along the circumference of the threaded hole of the first locking nut 30.

[0039] For further information, see Figure 4 The bolt and nut assembly 100 further includes a first clamping nut 61 and a second clamping nut 62. The first clamping nut 61 is threadedly connected to the main threaded rod 11, the outer surface of the second locking nut 40 is provided with threads, and the second clamping nut 62 is threadedly connected to the outer surface of the second locking nut 40. The first clamping nut 61 is screwed into the main threaded rod 11 (that is, the first clamping nut 61 is threadedly connected to the main threaded rod 11), the second clamping nut 62 is threadedly connected to the outer surface of the second locking nut 40, and the first clamping nut 61 and the second clamping nut 62 are abutted and fixed, thereby enhancing the stability of the bolt and nut assembly 100.

[0040] In this embodiment, a method for using the bolt and nut assembly 100 is provided as follows:

[0041] The first tightening nut 61 is screwed into the main threaded rod 11, the second locking nut 40 is screwed into the main threaded rod 11, the secondary threaded rod 12 passes through and extends out of the avoidance hole 22, the thread at the opening of the reserved groove 21 is threadedly matched with the thread of the annular boss 41, and the fastener 20 is abutted against the second locking nut 40, the first locking nut 30 is screwed into the secondary threaded rod 12, and the second tightening nut 62 is screwed into the second locking nut 40, that is, the second tightening nut 62 is threadedly matched with the thread on the outer surface of the second locking nut 40, and the first tightening nut 61 and the second tightening nut 62 are abutted and fixed. In this embodiment, when the bolt body 10 is loosened abnormally, since the spiral direction of the thread of the main threaded rod 11 is opposite to the spiral direction of the thread of the secondary threaded rod 12, or the pitch of the thread of the main threaded rod 11 is different from the pitch of the thread of the secondary threaded rod 12, the second locking nut 40 and the first locking nut 30 are more strongly locked to the fastener 20. At the same time, the reserved groove 21 in the fastener 20 is in a hollow state, and when the locking member is squeezed, the locking member rebounds strongly elastically, forcing the bolt body 10, the second locking nut 40, the fastener 20, and the first locking nut 30 to be connected into a more stable overall structure, thereby achieving the technical effect of preventing loosening.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other changes in different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they may still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bolt and nut assembly, characterized in that: include: A bolt body, the bolt body comprising a main threaded rod and a secondary threaded rod, a thread is arranged on the outer side of the main threaded rod, the secondary threaded rod extends outwardly from one end of the main threaded rod, and a thread is arranged on the outer side of the secondary threaded rod; A first locking nut, wherein the first locking nut is provided with a threaded hole; A second locking nut, wherein the second locking nut is provided with a threaded hole, and the threaded hole of the second locking nut is threadably matched with the thread located on the main threaded rod; A fastener, wherein the fastener is concavely provided with a reserved groove, a through avoidance hole is opened at the bottom of the reserved groove, the opening of the reserved groove faces the second locking nut, the secondary threaded rod passes through and extends out of the avoidance hole, and the end face of the fastener at the opening of the reserved groove abuts against the second locking nut, and the reserved groove is in a hollow state; Wherein, the threaded hole of the first locking nut is threadably connected with the thread located on the secondary threaded rod; The main threaded rod is cylindrical, with threads extending helically along the length direction of the main threaded rod, and the secondary threaded rod extends outward from one end of the threaded rod in the length direction; the secondary threaded rod is cylindrical, with threads extending helically along the length direction of the secondary threaded rod; The helical direction of the thread located on the primary threaded rod is opposite to the helical direction of the thread located on the secondary threaded rod; The bolt and nut assembly also includes a first tightening nut and a second tightening nut; the first tightening nut is threadedly connected to the main threaded rod, the outer surface of the second locking nut is provided with a thread, the second tightening nut is threadedly connected to the outer surface of the second locking nut, and the first tightening nut and the second tightening nut are abutted and fixed.

2. The bolt and nut assembly according to claim 1, characterized in that: A bolt cap is extended from one end of the main threaded rod away from the secondary threaded rod, and the bolt cap, the main threaded rod and the secondary threaded rod are integrally formed.

3. The bolt and nut assembly according to claim 1, characterized in that: The pitch of the threads located on the primary threaded rod is different from the pitch of the threads located on the secondary threaded rod.

4. The bolt and nut assembly according to claim 1, characterized in that: The fastener is a cover-shaped structure, and the reserved groove is recessed from one end surface of the fastener along the length direction of the fastener.

5. The bolt and nut assembly according to claim 4, characterized in that: A thread is provided at the opening of the reserved groove, an annular boss is protruding from one side of the second locking nut, a thread is provided on the outer surface of the annular boss, and the thread located on the annular boss is threadedly connected with the thread located at the opening of the reserved groove.

6. The bolt and nut assembly according to claim 1, characterized in that: The thread diameter of the secondary threaded rod is smaller than the thread diameter of the primary threaded rod, the aperture of the avoidance hole is larger than the thread diameter of the secondary threaded rod, and the aperture of the avoidance hole is smaller than the thread diameter of the primary threaded rod.

7. The bolt and nut assembly according to claim 1, characterized in that: The first locking nut is provided with one or more through holes, and correspondingly, the fastener is provided with locking holes corresponding to the positions of the one or more through holes; the bolt and nut assembly also includes one or more fastening screws, which pass through the through holes and are threadedly connected with the locking holes.

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