Self-locking threaded nut for clamp mounting

Abstract

Self-locking threaded nut, designed for use with an external threaded bolt, in particular a latch-lock housing, characterized in that the body of the threaded nut is split so that it can be moved axially along an external threaded bolt without rotation, wherein the threaded nut body includes a detent or snap device for automatic positive locking in order to enable subsequent fixing without tools.

Description

[0001] The present invention relates to a self-locking threaded nut (1) for locking a door leaf to a door frame as part of a locking or security device. The invention is preferably used in industrial fastening, locking, and locking systems, in particular for the quick assembly and fixing of an externally threaded bolt (7), preferably in housings of latch locks in panel and housing constructions where increased vibration resistance is required.

[0002] Various self-locking fasteners, such as threaded nuts, fastening forks, or fixing units for externally threaded bolts, especially for latch locks, are known. Such solutions are, for example, designed as hexagonal nuts or – as described in German patent DE102024116854 – as fasteners with tool-free fastening and vibration resistance.

[0003] However, the existing solutions have several disadvantages. In particular, conventional threaded nuts cannot be moved axially along the external thread without rotation, which leads to increased assembly times. Furthermore, many existing solutions have insufficient vibration resistance, meaning the connection can loosen under dynamic load.

[0004] Furthermore, conventional threaded nuts predominantly require the use of tools, especially torque wrenches, which results in increased space requirements, longer assembly times and additional costs.

[0005] Furthermore, when tightening using vibration-resistant fasteners with positive locking cams or teeth, damage to the panel's contact surface can occur.

[0006] Furthermore, many well-known solutions are only inadequately protected against corrosion and aggressive chemical media and often consist of several individual components, which makes assembly prone to errors and requires trained specialists.

[0007] Furthermore, fastening forks are known that are designed exclusively for a specific panel thickness and require additional relief grooves on the external threaded bolt (7), particularly in the area of ​​the housing of a latch lock, which limits their possible applications.

[0008] The purpose of the design according to the invention is to eliminate the disadvantages described above.

[0009] The challenge is solved by a self-locking threaded nut (1) according to claim 1 and four further claims.

[0010] The threaded nut (1) according to the invention is split so that it can be displaced axially along an external threaded bolt (7) to a desired position without rotation. The diameter of the internal thread (6) is changed by slightly compressing the side surfaces (5) of the detent or snap device (4) on both sides, causing the diameter of the internal thread (6) to expand elastically.

[0011] During actuation, the inner surfaces of the detent or snap device (4) slide along a designated recess (3), allowing free adjustment of the internal thread diameter (6). The side surfaces (5) remain movable as long as the detent or snap device (4) is open, thus ensuring free axial displacement of the threaded nut (1).

[0012] The fixing is achieved by means of a self-locking tab (4a), which, during a subsequent manual rotation of the threaded nut (1), engages in a designated receiving contour (5a) after contact with the door surface or panel (8). This closes the locking or snapping device (4), and the diameter of the internal thread (6) is fixed in a form-fit and force-fit manner.

[0013] A further manual turn using the provided cams (2) securely engages the threaded nut (1) in the locking position, forming a vibration-proof fixing unit. Due to the symmetrical design of the locking or snapping device (4), the mounting side of the threaded nut (1) is irrelevant.

[0014] The contact surface of the threaded nut (1) includes an elastic damping element (not shown), preferably a spot or full-surface polyurea (PUA) coating, which provides increased vibration resistance and reliably prevents unintentional loosening of the connection. At the same time, the surface of the panel (8) is protected from damage.

[0015] The described threaded nut (1) enables quick, especially tool-free, assembly without prior rotation, ensures secure fastening and exhibits high vibration resistance, without requiring additional tools or trained personnel. This significantly reduces assembly effort and manufacturing costs.

[0016] Furthermore, the threaded nut offers effective protection against corrosion and aggressive chemical media, is compatible with panels of different thicknesses and does not affect the surface finish.

[0017] The additional PUA coating also prevents the colonization and growth of bacteria and fungi. This is particularly important for applications in air handling units (AHUs), where hygiene and air quality requirements are higher.

[0018] In summary, the solution according to the invention achieves in particular the following advantages: • quick assembly of the threaded nut (1) • Secure locking mechanism using only hand force, without the use of special tools • reliable fastening of the external threaded bolt (7), especially in housings of latch locks • increased vibration resistance of the connection • does not affect the surface finish of the panel • increased corrosion and media resistance • Universal applicability with simultaneously reduced assembly costs.

[0019] Further details and advantages of the present solution according to the invention are explained below with reference to an exemplary embodiment illustrated in the figures. These show: Fig. 1 - Quick-release nut in adaptable state Fig. 2 - Quick-release nut in the fixed position Fig. 3 - Quick-release nut with latch installed on the panel Reference symbol: 1 threaded nut 2 cams 3 recesses 4. Locking or snapping device 4a Tab 5 side surface 5a Recording contour 6 threads 7 external threaded bolts 8 panels QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] DE 102024116854

[0002]

Claims

[1] Self-locking threaded nut, designed for use with an external threaded bolt, in particular a latch-lock housing, characterized by , that the body of the threaded nut is designed to be split, so that it can be moved axially without rotation along an external threaded bolt, wherein the threaded nut body includes a detent or snap device for automatic positive locking in order to enable subsequent fixing without tools. [2] Threaded nut according to claim 1, characterized by that the locking or snapping device for automatic positive locking is formed uniformly with the body of the threaded nut. [3] Threaded nut according to claim 1 to 2, characterized by that the body is made of an elastic or elastically deformable polymer or of a polymeric composite material. [4] Threaded nut according to claims 1 to 3, characterized bythat an end face of the body intended for attachment to a panel or door surface, or the entire body, is coated with or consists of polyurea (PUA) in order to increase friction, strength, especially in the case of multiple layers, and to improve hygienic properties. [5] Threaded nut according to claims 1 to 4, characterized by that the body is provided on its circumference with protrusions, cams or drive surfaces that allow manual operation.

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