Anti-loosening bolt and nut fastening structure
By designing a fastening structure including a screw, a fastening nut, an auxiliary nut and a tightening wire, the problem of nut looseness in the prior art is solved, and the effect of safety improvement and easy processing is achieved.
Patent Information
- Application Number
- CN202421732894.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-04-15
- Estimated Expiration
- 2034-07-22
AI Technical Summary
The prior art has problems such as inconvenience in operating, high cost, difficulty in processing and loosening when preventing the nut from loosening.
A fastening structure including a screw, a fastening nut, an auxiliary nut and a tightening wire is designed. The force is transmitted between the fastening nut and the auxiliary nut through the loop, and the tightening wire restrains the auxiliary nut, so that it applies pressure when the fastening nut is loose to prevent loosening.
It effectively prevents loosening of the fastening nut, improves safety, and is simple in structure and easy to process.
Smart Images
Figure CN222760117U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of mechanical fastening parts, in particular to an anti-loosening bolt and nut fastening structure. Background Art
[0002] Bolts and nuts are used to fasten parts in mechanical engineering. In some important fastening parts of machinery, loose nuts may lead to serious consequences and even threaten the life of the operator. At present, some technical solutions and specific methods to prevent nuts from loosening have appeared in this field, but there are still problems such as inconvenient operation, high cost, difficult processing, and looseness. Therefore, a relatively simple anti-loosening fastening structure is needed. Utility Model Content
[0003] In view of the above-mentioned defects, the utility model provides an anti-loosening bolt and nut fastening structure, which has a simple structure and is easy to process, and can prevent the problem of nut loosening.
[0004] In order to achieve the purpose of this utility model, the following technologies are proposed:
[0005] A bolt and nut fastening structure for preventing loosening, comprising:
[0006] The screw comprises a head, a first threaded portion is provided at the lower end of the head, a second threaded portion is provided at the lower end of the first threaded portion, the first threaded portion and the second threaded portion have opposite rotation directions, and the diameter of the first threaded portion is greater than the diameter of the second threaded portion;
[0007] The fastening assembly includes a fastening nut screwed on the first threaded portion, and an auxiliary nut screwed on the second threaded portion, a collar is provided between the fastening nut and the auxiliary nut, a first spiral portion with the same rotation direction as the first threaded portion is provided in the screw hole of the fastening nut, and a second spiral portion with the same rotation direction as the second threaded portion is provided in the screw hole of the auxiliary nut. The fastening assembly also includes a plurality of tensioning wires connecting the outer peripheral side of the fastening nut and the outer peripheral side of the auxiliary nut, and the tensioning wires are located on the outer side of the collar and are arranged in a counterclockwise direction from top to bottom in a top view.
[0008] Furthermore, the fastening nut and the auxiliary nut have six side edges respectively.
[0009] Further, the number of the tension wires is at least one and at most six.
[0010] Furthermore, the lower end surface of the fastening nut is also provided with an upper ring groove located outside the screw hole of the fastening nut, and the upper end surface of the auxiliary nut is provided with a lower ring groove located outside the screw hole of the auxiliary nut. The upper end of the ring is rotatably matched with the upper ring groove, and the lower end is rotatably matched with the lower ring groove.
[0011] Furthermore, each side edge of the fastening nut is respectively provided with a first wire hole passing through the intersecting sides of the side edges, and each side edge of the auxiliary nut is respectively provided with a second wire hole passing through the intersecting sides of the side edges, and the tensioning wire is a closed loop and is respectively passed through a first wire hole and a second wire hole.
[0012] The beneficial effects of this technical solution are:
[0013] When the fastening nut tends to loosen, under the action of the tension wire, the auxiliary nut will cause the collar to apply pressure in the direction of the fastening nut to prevent the fastening nut from loosening, thereby improving safety. The entire structure is relatively simple and easy to process. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 An overall stereogram of an embodiment of the present application is shown.
[0015] Figure 2 A stereoscopic view of a screw rod according to an embodiment of the present application is shown.
[0016] Figure 3 A partial exploded view of a fastening assembly according to an embodiment of the present application is shown. DETAILED DESCRIPTION
[0017] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.
[0018] like Figure 1~Figure 3 An anti-loosening bolt and nut fastening structure shown includes a screw rod 1 and a fastening assembly 2.
[0019] The screw 1 includes a head 11 , a first threaded portion 12 is disposed at the lower end of the head 11 , a second threaded portion 13 is disposed at the lower end of the first threaded portion 12 , the first threaded portion 12 and the second threaded portion 13 have opposite rotation directions, and the diameter of the first threaded portion 12 is greater than the diameter of the second threaded portion 13 .
[0020] The fastening assembly 2 includes a fastening nut 21 screwed to the first threaded portion 12, and an auxiliary nut 24 screwed to the second threaded portion 13, a collar 28 is provided between the fastening nut 21 and the auxiliary nut 24, a first spiral portion 22 with the same rotation direction as the first threaded portion 12 is provided in the screw hole of the fastening nut 21, each side edge of the fastening nut 21 is respectively provided with a first line hole 23 penetrating the intersecting side surfaces of the side edges, and an upper ring groove is also provided on the lower end surface of the fastening nut 21 located outside the screw hole of the fastening nut 21, a second spiral portion 25 with the same rotation direction as the second threaded portion 13 is provided in the screw hole of the auxiliary nut 24, and each side edge of the auxiliary nut 24 is respectively provided with a first line hole 23 penetrating the intersecting side surfaces of the side edges. A second wire hole 26 is separately provided which passes through the intersecting sides of the side edges. The upper end surface of the auxiliary nut 24 is also provided with a lower ring groove 27 located outside the screw hole of the auxiliary nut 24. The upper end of the ring 28 is rotatably fitted in the upper ring groove, and the lower end is rotatably fitted in the lower ring groove 27. The fastening assembly 2 also includes a plurality of tensioning wires 29. The tensioning wires 29 are in a closed loop and are respectively passed through a first wire hole 23 and a second wire hole 26. The portion of the tensioning wire 29 located outside the ring 28 is arranged from top to bottom in a counterclockwise direction when viewed from above. Specifically, the fastening nut 21 and the auxiliary nut 24 respectively have six side edges, and the number of tensioning wires 29 is at least one and at most six.
[0021] Working method:
[0022] When the fastening nut 21 reaches the pressure set with the screw 1 under the action of external force, if there is a tendency to loosen due to vibration generated by the operation of the equipment or other reasons, the fastening nut 21 tends to rotate in the loosening direction. Because of the constraint of the tension wire 29, the auxiliary nut 24 will be driven to rotate in the tightening direction, and the auxiliary nut 24 will generate a force pointing to the fastening nut 21. This force is transmitted to the fastening nut 21 through the ring 28, thereby preventing the fastening nut 21 from rotating and preventing the fastening nut 21 from loosening.
[0023] In addition, if the fastening nut 21 does not reach the limit pressure with the screw 1 under the action of external force, that is to say, when the equipment is running, the fastening nut 21 may tend to be tightened, although the amplitude is not large, but there is a possibility. When this happens, the fastening nut 21 drives the auxiliary nut 24 to rotate in the forward direction, and a gap appears between the fastening nut 21 and the auxiliary nut 24, but it will not affect the fastening effect of the fastening nut 21.
[0024] In addition, disassembly is also possible. Specifically, disassembly can be easily performed by simply cutting the tension wire 29 .
[0025] The above are only some of the embodiments listed in this application and are not intended to limit this application.
Claims
1. A bolt and nut fastening structure to prevent loosening, characterized in that: include: A screw rod (1) comprises a head (11), a first threaded portion (12) being provided at the lower end of the head (11), a second threaded portion (13) being provided at the lower end of the first threaded portion (12), the first threaded portion (12) and the second threaded portion (13) having opposite rotation directions, and a diameter of the first threaded portion (12) being greater than a diameter of the second threaded portion (13); The fastening assembly (2) comprises a fastening nut (21) screwed to a first threaded portion (12), and an auxiliary nut (24) screwed to a second threaded portion (13); a collar (28) is provided between the fastening nut (21) and the auxiliary nut (24); a first spiral portion (22) having the same rotation direction as the first threaded portion (12) is provided in the screw hole of the fastening nut (21); a second spiral portion (25) having the same rotation direction as the second threaded portion (13) is provided in the screw hole of the auxiliary nut (24); the fastening assembly (2) further comprises a plurality of tensioning wires (29) connecting the outer peripheral side of the fastening nut (21) and the outer peripheral side of the auxiliary nut (24); and the tensioning wires (29) are arranged on the outer side of the collar (28) in a counterclockwise direction from top to bottom when viewed from above.
2. The anti-loosening bolt and nut fastening structure according to claim 1, characterized in that: The fastening nut (21) and the auxiliary nut (24) each have six side edges.
3. The anti-loosening bolt and nut fastening structure according to claim 2, characterized in that: The number of the tension wires (29) is at least one and at most six.
4. The anti-loosening bolt and nut fastening structure according to claim 1, characterized in that: The lower end surface of the fastening nut (21) is also provided with an upper ring groove located outside the screw hole of the fastening nut (21), and the upper end surface of the auxiliary nut (24) is provided with a lower ring groove (27) located outside the screw hole of the auxiliary nut (24). The upper end of the collar (28) is rotatably engaged with the upper ring groove, and the lower end is rotatably engaged with the lower ring groove (27).
5. The anti-loosening bolt and nut fastening structure according to claim 1, characterized in that: Each side edge of the fastening nut (21) is provided with a first thread hole (23) penetrating through the intersecting side surfaces of the side edges, each side edge of the auxiliary nut (24) is provided with a second thread hole (26) penetrating through the intersecting side surfaces of the side edges, and the tension wire (29) is in a closed loop and is respectively passed through a first thread hole (23) and a second thread hole (26).