Structure with anti-loosening fastening function between nuts
By creating an axisymmetrically spaced fastening groove on the thread crest of the secondary nut, dividing the thread into front and rear parts and compressing the main nut thread, the problem of unstable performance of existing nut anti-loosening methods in complex environments is solved, achieving stable connection and low-cost anti-loosening effect.
Patent Information
- Application Number
- CN202423283998.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Existing methods for preventing nut loosening are unstable under heavy loads, severe vibrations, and harsh environments. They are also complex to process, costly, or structurally limited, making them unusable and posing safety hazards.
Axially symmetrical, spaced-out fastening grooves are made on the thread crest of the secondary nut, dividing the thread into front and rear sections. After tightening, these sections press against the threads of the main nut in opposite directions, increasing friction to prevent loosening.
It achieves stable connection of nuts in complex environments, reduces production costs, improves versatility and anti-loosening effect, and is simple to operate and safe and reliable.
Smart Images
Figure CN223536739U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to an anti-loosening fastening device, particularly a structure that has an anti-loosening fastening function between nuts. Background Technology
[0002] Currently, common nut anti-loosening methods in existing technologies include: riveting, mechanical anti-loosening, and friction anti-loosening. Methods to increase friction include setting pressure points, locking washers, fastening nuts, nylon inserts, and chemical adhesives. However, these methods exhibit performance instability under heavy loads, severe vibrations, and harsh environmental conditions. Mechanical anti-loosening methods include slotted nuts, cotter pins, locking washers, wire connections, and concave cone locking, but some are structurally limited and can only be used as custom parts, with limited applications and non-reusable. Other anti-loosening methods include eccentric nuts, conical clamping anti-loosening, and Tang-style anti-loosening. These methods are complex to manufacture and costly, and the main body may break or be damaged under high torque, posing safety hazards during use. Utility Model Content
[0003] This invention provides a structure with anti-loosening fastening function between nuts, which is not only simple in structure and low in manufacturing cost, but also has a good loosening effect.
[0004] This utility model adopts the following technical solution: a structure with anti-loosening and fastening function between nuts, which includes a main nut and a secondary nut. A separation fastening groove is opened on the crest of one of the threads I of the secondary nut. The separation fastening groove divides the thread of the secondary nut into a front thread part and a rear thread part. When the main nut and the secondary nut are tightened, the front thread part and the rear thread part respectively press the thread on the main nut connected to the secondary nut in opposite directions. Moreover, the contact surface of the thread I of the front thread part and the thread II of the main nut thread is opposite to the contact surface of the thread I of the rear thread part and the thread II of the main nut thread.
[0005] Furthermore, the aforementioned separating fastening groove has an axisymmetric shape.
[0006] Furthermore, the aforementioned separating fastening groove is an isosceles triangle or an isosceles trapezoid.
[0007] This utility model has the following beneficial effects: By adopting the above technical solution, this utility model utilizes a separating fastening groove on the crest of one of the threads (I) of the secondary nut, thereby increasing the friction between the main nut and the secondary nut, thus achieving the anti-loosening requirement of the main nut and the secondary nut. It not only has a simple structure and is easy to process, but it can also adapt to the mutual locking between any threads, has good versatility, and greatly reduces production costs. Moreover, the anti-loosening effect is excellent, achieving a non-loosening effect, and operation is also convenient. The separating fastening groove of this utility model is axisymmetric, and its axisymmetric shape can be an isosceles triangle or an isosceles trapezoid, which can effectively balance the force on both sides, further improving the anti-loosening effect. Attached Figure Description
[0008] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0009] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model. Detailed Implementation
[0010] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.
[0011] exist Figure 1 This utility model provides a structure with anti-loosening fastening function between nuts, which includes a main nut 1 and a secondary nut 2. A separation fastening groove 4 is opened on the crest of one of the threads I3 of the secondary nut 1. The separation fastening groove 4 divides the thread of the secondary nut 2 into a front thread portion 5 and a rear thread portion 6. When the main nut 1 and the secondary nut 2 are tightened, the front thread portion 5 and the rear thread portion 6 respectively press the thread on the main nut 1 connected to the secondary nut 2 in opposite directions. The contact surface of the thread I3 of the front thread portion 5 and the thread II7 of the main nut 1 is opposite to the contact surface of the thread I3 of the rear thread portion 6 and the thread II7 of the main nut 1. The separation fastening groove 4 is axially symmetrical and is an isosceles triangle or an isosceles trapezoid. The separation fastening groove 4 used in this embodiment is an isosceles triangle.
[0012] The method of using this utility model is as follows: After tightening the main nut 1 and the auxiliary nut 2, the front thread portion 5 and the rear thread portion 6 of the auxiliary nut press the threads on the main nut 1 that are connected to the auxiliary nut 2 in opposite directions. This makes the threads I3 of the front thread portion 5 and the threads I3 of the rear thread portion 6 of the auxiliary nut 2 exert a tightening force on the main nut 1 in both directions along the axis, thereby increasing the friction between the main nut 1 and the auxiliary nut 2, and thus achieving the requirement of preventing the main nut 1 and the auxiliary nut 2 from loosening.
[0013] However, this is not the only possibility. Any variations or substitutions conceived without inventive effort should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope defined in the claims.
Claims
1. A structure with an anti-loosening tightening function between nuts, characterized in that... It includes a main nut (1) and a secondary nut (2). A separation fastening groove (4) is opened on the top of one of the threads I (3) of the secondary nut (2). The separation fastening groove (4) divides the thread of the secondary nut (2) into a front thread portion (5) and a rear thread portion (6). When the main nut (1) and the secondary nut (2) are tightened, the front thread portion (5) and the rear thread portion (6) press the thread on the main nut (1) connected to the secondary nut (2) in opposite directions. The contact surface of the thread I (3) of the front thread portion (5) and the thread II (7) of the main nut (1) is opposite to the contact surface of the thread I (3) of the rear thread portion (6) and the thread II (7) of the main nut (1).
2. The structure with anti-loosening and fastening function between nuts according to claim 1, characterized in that: The aforementioned separating fastening groove (4) has an axisymmetric shape.
3. The structure with anti-loosening and fastening function between nuts according to claim 2, characterized in that: The aforementioned separating fastening groove (4) is an isosceles triangle or an isosceles trapezoid.