Novel concave-convex matched high-locking nut

Abstract

The utility model belongs to the technical field of nuts, and particularly relates to a novel concave-convex matched high-locking nut which comprises a concave high-locking nut and a convex high-locking nut, and radial sawteeth matched with each other are arranged on the corresponding surfaces of the concave high-locking nut and the convex high-locking nut. The concave high-locking nut and the convex high-locking nut are respectively provided with trapezoid cutting grooves which are in interference fit with each other. According to the device, the concave high-locking nut and the convex high-locking nut are in interference fit, and the cutting groove is formed in the upper end face of the convex high-locking nut, so that more compact screw-thread fit and more accurate closing-up are conveniently realized through extrusion, a locking effect is achieved, an additional closing-up device is not needed, and the danger that a thread cracks in the process of closing-up first and then assembling is avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of nuts, and particularly relates to a novel high-locking nut with concave-convex matching. Background Art

[0002] High-lock nuts, as innovative fasteners developed in the United States in the 1950s, cannot be reused and are often used in conjunction with high-lock bolts. Because of their excellent anti-loosening performance, controllable preload and efficient assembly, they occupy a core position in the manufacture of aerospace vehicles. In the past, my country mainly relied on imported high-lock nuts in the research and development of aerospace products. However, due to the instability of the procurement cycle and the increase in costs, the demand for independent research and development of such fasteners has become increasingly important. Now, although there are some domestically produced high-lock nut series in China, such as a high-lock nut disclosed in a Chinese patent, application number: CN200820300590.X. It includes a nut body (1) with a threaded hole, the nut body (1) is composed of a self-locking part (4) and a twist-off part (2), and a neck-breaking groove (3) is provided between the connection between the self-locking part (4) and the twist-off part (2). There are still many gaps to be filled in the closing method, material type and specification of this high-lock nut. The closing structure design makes the internal thread easy to break when subjected to force, which seriously affects the reliability of the high-lock nut. At the same time, due to the need for specific processing, testing equipment and tooling, the production cost of high lock nuts also increases accordingly. The closing process is relatively cumbersome, resulting in a relatively long production cycle for high lock nuts. At the same time, the closing parameters will also affect the twisting torque, which brings many unstable factors to the installation and use of high lock nuts. In-depth research on high lock nuts is still the focus of our work. Therefore, it is necessary to design a new type of high lock nut to solve the above technical problems. Utility Model Content

[0003] The utility model aims to provide a novel high-lock nut with concave-convex matching to solve the problems existing in the background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of concave-convex matching high lock nut, including a concave high lock nut and a convex high lock nut, the corresponding surfaces of the concave high lock nut and the convex high lock nut are provided with radial serrations that match each other, and the concave high lock nut and the convex high lock nut are respectively provided with trapezoidal grooves that are interference fit with each other.

[0005] Preferably, the upper end of the convex lock nut is provided with four semicircular grooves.

[0006] Preferably, a twist-off groove is provided on the outer side of the concave high lock nut.

[0007] Preferably, the height of the radial serrations is greater than the thread pitch of the concave high lock nut and the convex high lock nut.

[0008] Preferably, the trapezoidal cut groove of the concave high lock nut is smaller than the trapezoidal cut groove of the convex high lock nut.

[0009] Preferably, the number of the radial serrations is 24.

[0010] The beneficial effects of the utility model are as follows: the concave high lock nut and the convex high lock nut in the device produce an interference fit, and the upper end face of the convex high lock nut is provided with a groove, which is very convenient for squeezing to achieve a tighter thread fit and a more accurate closing to produce a locking effect, without the need for an additional closing device, thereby solving the risk of cracks in the thread during the process of closing first and then assembling; the upper and lower end faces of the high lock nut are provided with serrated anti-loosening measures, which prevent loosening and maintain the tightening effect of the squeezed thread; the overall deformation of the internal thread is regular, the stability is higher, and it is not easy to deform and fail, so the locking torque of the high lock bolt when screwing in can be stably maintained, thereby extending the service life of the high lock nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a three-dimensional diagram of the utility model;

[0012] Figure 2 It is a cross-sectional view of the utility model;

[0013] Figure 3 It is an exploded view of the concave high lock nut and the convex high lock nut in the utility model. DETAILED DESCRIPTION

[0014] In the description of the present disclosure, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present disclosure 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 disclosure.

[0015] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0016] In the description of the present disclosure, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" 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, an electrical connection, or a communication connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0017] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings and preferred embodiments.

[0018] like Figure 1-3 As shown, the utility model discloses a novel concave-convex matching high lock nut, comprising a concave high lock nut 1 and a convex high lock nut 3, both of which are provided with trapezoidal cutting grooves 4 and radial serrations 5; a twisting groove 2 is provided on the outer side of the concave high lock nut for easy twisting.

[0019] Four semicircular cut grooves 8 are left at the upper end of the convex lock nut 3, which are equally spaced around the upper end of the convex lock nut 3 to facilitate extrusion.

[0020] Both the concave high lock nut 1 and the convex high lock nut 3 are provided with a trapezoidal groove 4, and there is an interference fit between the two trapezoidal grooves 4. The internal threads 6 of the concave high lock nut 1 and the convex high lock nut 3 are squeezed with the external threads of the high lock bolt 7, producing a locking effect.

[0021] Both the concave high lock nut 1 and the convex high lock nut 3 are provided with 24 radial serrations 5, the height of the radial serrations 5 is greater than the thread pitch, and a wedge effect is generated when they are matched, making them difficult to loosen.

[0022] When using the utility model, during assembly, the middle piece 9 is screwed into the high locking bolt 7 used in conjunction with the high locking nut of the utility model, the convex high locking nut 3 is screwed into the high locking bolt 7 to contact with the middle piece 9, and the concave high locking nut 1 is screwed into the high locking bolt 9. A certain wrench torque is applied to the twisting structure 10 through a special tool, so that the twisting groove 2 is twisted off. During the tightening process of the concave and convex high locking nuts, the trapezoidal groove 4 of the concave high locking nut 1 squeezes the trapezoidal groove 4 of the convex high locking nut 3 to close, so that the high locking nut and the high locking bolt 7 produce a locking effect, thereby completing the assembly of the new high locking nut.

[0023] Through the cooperation of the concave and convex high-locking nuts, it is very convenient to squeeze and achieve a tighter thread fit, and the closing can produce a locking effect more accurately. No additional closing device is required, which solves the risk of cracks in the thread during the closing and assembly process; the end face of the high-locking nut is provided with a serrated anti-loosening measure to prevent loosening and maintain the tightening effect of the extruded thread, ensuring the usability of the high-locking nut; the new high-locking nut does not require a closing structure, simplifies the production process, and shortens the manufacturing cycle. In addition, this also reduces the investment in the required processing, testing equipment and tooling, thereby reducing the overall manufacturing cost of the high-locking nut. This design also eliminates the influence of the closing parameters on the twisting torque, making the installation and use of the high-locking nut more stable and reliable. The self-locking function of the new high-locking nut is achieved through its internal concave and convex structure. Compared with the method of relying on an external closing device in the prior art, the overall deformation of its internal thread is more regular, more stable, and less prone to deformation and failure. Therefore, it can more stably maintain the locking torque of the high-locking bolt when it is screwed in, thereby extending the service life of the high-locking nut.

[0024] It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be regarded as the protection scope of the utility model.

Claims

1. A new type of high lock nut with concave and convex fit, characterized in that: It comprises a concave high lock nut and a convex high lock nut, the corresponding surfaces of the concave high lock nut and the convex high lock nut are provided with radial serrations which cooperate with each other, and the concave high lock nut and the convex high lock nut are respectively provided with trapezoidal grooves which are interference fit with each other.

2. According to claim 1, the novel high-lock nut with concave-convex fit is characterized in that: The upper end of the convex lock nut is provided with four semicircular grooves.

3. According to claim 1, the novel high-lock nut with concave-convex fit is characterized in that: The outer side of the concave high lock nut is provided with a twist-off groove.

4. According to claim 1, the novel high-lock nut with concave-convex fit is characterized in that: The height of the radial serrations is greater than the thread pitch of the concave high lock nut and the convex high lock nut.

5. According to claim 1, the novel high-lock nut with concave-convex fit is characterized in that: The trapezoidal groove of the concave high lock nut is smaller than the trapezoidal groove of the convex high lock nut.

6. According to claim 1, the novel high-lock nut with concave-convex fit is characterized in that: The number of radial serrations is 24.

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