An overload-preventing fastening assembly and a bathroom equipment mounting structure having the same

Abstract

The utility model provides a kind of anti-overload fastening assembly, including: threaded joint, with the internal thread matched with fastener;Torque limiting portion, fixedly connected with threaded joint;And when the torque between the torque limiting portion and threaded joint is applied to exceed threshold value, torque limiting portion is separated from threaded joint.The torque limiting portion is arranged around threaded joint, the connection between the torque limiting portion and threaded joint is realized by predetermined fracture structure, the predetermined fracture structure includes a plurality of tapered connecting arms, and the cross-sectional area decreases from the torque transfer portion to the threaded joint direction. Through a kind of anti-overload fastening assembly and the bathroom equipment mounting structure with it, torque control and overload protection in the fastening process are realized, while the stability and reliability of mounting structure are improved.

Description

Technical Field

[0001] This utility model relates to the field of bathroom fasteners, specifically to an overload-proof fastening component and a bathroom equipment installation structure having the same. Background Technology

[0002] During the installation of bathroom fixtures and other products, fasteners are typically used to secure hinges and other components to the toilet body. In existing technologies, fastening operations largely rely on the experience of the installer to control torque. Excessive torque can easily lead to damage such as stripped threads or structural cracks in the fasteners or base components; insufficient torque, on the other hand, can cause loosening and affect the stability of the equipment. Traditional fastening structures lack effective overload protection mechanisms and are prone to loosening and detachment due to vibration after installation, making it difficult to balance installation reliability and structural protection. To address these issues, this invention proposes an overload-resistant fastening component and bathroom fixture installation structure. By integrating a torque limiting function, it achieves automatic overload protection while improving installation stability, thus solving the torque control problems and loosening risks inherent in existing technologies. Utility Model Content

[0003] The problem this invention aims to solve is to achieve torque control and overload protection during the fastening process, while simultaneously improving the stability and reliability of the installation structure.

[0004] The technical solution adopted by this utility model to solve the above problems is as follows: an overload protection fastening component includes: a threaded engagement portion having an internal thread that mates with a fastener; a torque limiting portion fixedly connected to the threaded engagement portion; and when the torque applied between the torque limiting portion and the threaded engagement portion exceeds a threshold, the torque limiting portion separates from the threaded engagement portion.

[0005] Through a linkage structure that "fixedly connects the threaded joint and the torque limiting part and has a built-in threshold triggering mechanism", the dual effects of precise torque control and automatic disconnection during the fastening process are achieved. This solves the problems of fastener stripping and structural deformation caused by uncontrolled torque during manual operation, as well as component damage caused by accidental overload. At the same time, standardized fastening force ensures the long-term stability and reliability of the installation structure.

[0006] Furthermore, the torque limiting part is arranged around the threaded joint, and the torque limiting part and the threaded joint are connected by a predetermined fracture structure. The predetermined fracture structure includes a plurality of connecting arms arranged at intervals around the threaded joint, and the two ends of the connecting arms are respectively connected to the torque limiting part and the threaded joint, and the three are integrally formed.

[0007] The surrounding design places the fracture point on the outer wall of the threaded joint. Compared to a fracture at the bottom of the threaded joint, which would create a sharp angle, this design avoids this issue. Since toilet hinges are typically installed from bottom to top and often against a wall, there's a possibility of manual inspection of fasteners during installation. A sharp angle at the bottom could easily cut the installer's hand. Furthermore, to adjust the preset fracture threshold, the expandable cross-sectional area of ​​the sidewall is much larger than that of the bottom surface of the axis. When the fracture surface is at the bottom surface of the axis, the diameter of the opening is relatively fixed and subject to industry standards, preventing a deliberate increase in diameter. This limits the approach, requiring an increase in the fracture surface thickness to increase the cross-sectional area and thus the preset fracture threshold. However, a larger preset fracture threshold increases the probability of failure due to greater thickness. The sidewall area is often much larger than the cross-sectional area of ​​the opening, allowing for a wider expansion range and easier, more precise thickness control. Additionally, in the bottom connection design, the torsional force is entirely borne by the bottom fracture point, making it prone to premature fracture due to stress concentration. When under stress, the torque is distributed to the entire circumference of the tube through the connecting arm, avoiding stress concentration at a single fracture point.

[0008] Furthermore, the cross-sectional area of ​​the connecting arm decreases from the torque limiting part towards the threaded engagement part. This structure positions the break point at the connection of the threaded engagement part (i.e., the point with the smallest cross-section), achieving precise breakage of the connecting arm under torque overload, solving the problem of overload protection failure caused by uncertain break point, and ensuring controllable separation timing.

[0009] Furthermore, the threaded engagement portion includes: an upper operating section with a torque-transmitting outer surface; and a lower guide section, the inner diameter of which forms a radial clearance of 0.1-0.5 mm with the mating fastener, and the torque-limiting portion is arranged around the guide section. The upper operating section, with its torque-transmitting outer surface and a hexagonal or other shape adaptable to clamping tools, facilitates the application of torque during construction. The lower guide section serves for guidance and mating, with a radial clearance of 0.1-0.5 mm between its inner diameter and the mating fastener, providing guidance for assembly and ensuring mating accuracy.

[0010] Furthermore, the torque limiting part is a polygonal collar, with each side connected to the guide part via at least one connecting arm. The connecting arm is perpendicular to the side of the torque limiting part and points towards the axis of the guide part. The torque limiting part adopts a polygonal collar structure, preferably a hexagonal collar. The middle of each side of the collar is connected to the threaded engagement part via at least one connecting arm, and the direction of the connecting arm is perpendicular to the side of the torque limiting part. This structure provides greater clamping strength when the torque limiting part is clamped by adjustable clamping tools such as adjustable wrenches, effectively preventing clamping deformation. Moreover, compared to breakage at the bottom of the threaded engagement part, increasing clamping strength is generally achieved by increasing the area of ​​the clamping surface, which requires increasing the cross-sectional thickness, increasing material usage. The outer part is connected by connecting arms, and cavities are formed between the connecting arms, significantly reducing material usage.

[0011] Furthermore, the top of the torque limiting part extends radially outward to form a blocking protrusion. The function of this blocking protrusion is twofold: first, to prevent the clamping tool from dislodging from the torque limiting part during the knob turning process; and second, to keep the clamping direction radial, so that tools such as wrenches can directly rest against the side of the blocking protrusion near the clamping point during use, ensuring the stability of the applied force when applying torsional force.

[0012] Furthermore, the connection point between the connecting arm and the torque limiting part axially originates at the root of the blocking protrusion. Simultaneously, this axial origin of the connection point between the connecting arm and the torque limiting part ensures that the clamping surface directly forms the shortest support force path with the connecting arm, making the structure more stable and less prone to deformation, and ensuring that torsional force or clamping force can be efficiently transmitted to the connecting arm.

[0013] Furthermore, the separation torque threshold between the torque limiting part and the threaded engagement part is 1-10 N·m. Existing materials are not easily broken by twisting above 10 N.

[0014] A bathroom fixture installation structure includes a base component with an installation through hole; the aforementioned overload protection fastening assembly; and a fastener that passes through the installation through hole and forms an axial threaded engagement with the overload protection fastening assembly.

[0015] Furthermore, it also includes an axial limiting component, comprising a washer disposed between the overload protection fastening component and the base component; the outer diameter of the washer is 1.2-2 times larger than the maximum outer diameter of the torque limiting part.

[0016] The specific installation method is as follows: the base component is the toilet body, which is provided with a mounting through hole; after the fastener passes through the mounting through hole, it forms an axial thread engagement with the threaded joint of the overload fastening component, thereby fixing the hinge structure and other components of the toilet lid to the base component.

[0017] Beneficial effects 1. Precise and reliable overload protection: The predetermined fracture structure formed by the tapered connecting arm achieves preset torque control within the range of 1-10 N·m. The connecting arm breaks precisely in case of overload, effectively avoiding structural damage to the base components, fasteners and fixed parts.

[0018] 2. Convenient and efficient construction: The polygonal collar structure and blocking convex ring design of the torque limiting part improve the adaptability and force application stability of the clamping tool and reduce the difficulty of construction; the segmented design of the threaded joint takes into account both torque transmission and assembly guidance, improving assembly efficiency.

[0019] 3. Excellent installation stability: The optimized design of the axial limiting washer not only achieves axial limiting but also protects the torque limiting part after separation. Combined with the precise fit of the threaded joint, it effectively eliminates the risk of loosening and falling off after installation.

[0020] 4. Strong structural adaptability: The number of connecting arms, cross-sectional size, and shape of the torque limiting collar can be adjusted according to actual needs to adapt to different load scenarios; the design of the bathroom equipment installation structure can be applied to other equipment fields that require precise fastening. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall installation structure of the bathroom equipment of this utility model; Figure 2 This is a cross-sectional view of the installation of the overload protection fastening assembly of this utility model; Figure 3 This is a schematic diagram of the connecting arm portion of this utility model; Figure 4 This is a schematic diagram of the connecting arm portion with an arc-shaped part in this utility model; Figure 5 This is a schematic diagram of the torsional force of this utility model.

[0022] Illustration: 1. Threaded joint; 1.1. Operating part; 1.2. Guide part; 2. Torque limiting part; 2.1. Blocking ring; 3. Connecting arm; 4. Fastener; 5. Base component; 5.1. Mounting through hole; 6. Washer. Detailed Implementation

[0023] Before describing any embodiment of this invention in detail, it should be understood that the invention is not limited in its application to the details of the construction and arrangement of the components set forth in the following description or illustrated in the following figures. The invention is capable of other embodiments and can be practiced or carried out in various ways. Furthermore, it should be understood that the wording and terminology used herein are for descriptive purposes and should not be considered limiting. The use of “comprising” or “having” and variations thereof herein is intended to cover the items set forth below and their equivalents, as well as any additional items. Unless otherwise specified or limited, the terms “installation,” “connection,” “support,” and “linkage,” and variations thereof are used broadly and cover both direct and indirect installation, connection, support, and linking. Moreover, “connection” and “linkage” are not limited to physical or mechanical connections or links.

[0024] Furthermore, firstly, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the mechanism or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as a limitation on this utility model. Secondly, the term "a" should be understood as "at least one" or "one or more," that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple. The term "a" should not be construed as a limitation on the quantity.

[0025] Those skilled in the art should understand that the embodiments of the present invention described above and shown in the accompanying drawings are merely examples and do not limit the present invention. The purpose of the present invention has been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments. Without departing from the stated principles, the implementation of the present invention may have any variations or modifications.

[0026] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] Please refer to Figures 1 to 3 An overload protection fastening component and a bathroom equipment installation structure having the same are disclosed. The overload protection fastening component mainly consists of two parts: a threaded engagement part 1 and a torque limiting part 2. Its core function is to achieve overload protection through the controllable separation of the torque limiting part 2 and the threaded engagement part 1.

[0028] The threaded engagement part 1 has an internal thread that mates with the fastener 4, enabling threaded connection with the external fastener 4. The torque limiting part 2 is fixedly connected to the threaded engagement part 1. Its core overload protection principle is to achieve controllable separation by setting a preset fracture torque threshold. When the applied torque exceeds the corresponding threshold, the torque limiting part 2 will separate from the threaded engagement part 1, thereby avoiding structural damage caused by overload.

[0029] The torque limiting part 2 is arranged around the threaded joint part 1, and the two are connected by a predetermined fracture structure. The fracture structure consists of multiple tapered connecting arms 3 arranged at intervals around the threaded joint part 1. In the embodiment shown, six connecting arms 3 are used, or any number of connecting arms 3 can be used. The cross-sectional area of ​​the connecting arms 3 gradually decreases from the torque limiting part to the threaded joint part 1 so that the fracture point with the minimum torque is the connection point of the threaded joint part 1.

[0030] The torque limiting part 2 is engaged or secured to the bolt by rotation using a wrench or other tool. The torque applied to the torque limiting part 2 is transmitted to the threaded engagement part 1 via the connecting arm 3, causing the threaded engagement part 1 to be screwed onto the bolt. When the torque between the threaded engagement part 1 and the bolt reaches the desired level, further force is applied to the torque limiting part 2, causing the connecting arm 3 to break, thereby separating the threaded engagement part 1 from the connecting arm 3, and allowing the torque limiting part 2 with the broken connecting arm 3 to be removed (e.g., ...). Figure 5 (As shown). There's no need to worry about subjecting the overload protection fasteners to excessive torque or damaging the toilet.

[0031] exist Figure 3 In the illustrated embodiment, the axial cross-section of the connecting arm 3 is trapezoidal, with its side forming an angle of 15-75° with the outer wall of the threaded joint 1. This angled design allows for stress concentration at the fracture point, resulting in a smoother fracture surface. Alternatively, the side walls can be replaced with a bottom arc-shaped transition surface (e.g.,...). Figure 4 The same effect can be achieved by using the structure shown or any other surface whose cross-sectional area gradually decreases from the torque limiting part to the threaded joint 1.

[0032] Meanwhile, the torque limiting part 2 adopts a polygonal collar structure, which is hexagonal in the illustrated embodiment. Each side is connected to the threaded joint part 1 through at least one connecting arm 3, and the setting direction of the connecting arm 3 is perpendicular to the side of the torque limiting part 2, so that the polygonal collar structure can obtain more stable clamping strength when subjected to tools with adjustable clamps such as adjustable wrenches, and ensure that uneven force is not easily caused during clamping.

[0033] Each side of the hexagonal collar is a plane, forming surface contact with the jaws of the adjustable wrench (compared to the line contact of a circular structure). When the wrench applies clamping force, the force is evenly distributed across the entire sidewall, preventing stress concentration and premature damage to the clamping surface. The connecting arm 3 located in the center of the sidewall places the force application point at the geometric center, minimizing the torque transmission path.

[0034] At the top of the torque limiting part 2, a blocking protrusion ring 2.1 is formed extending radially outward to prevent the clamping tool from coming out of the torque limiting part 2 when the knob is turned. At the same time, it can keep the clamping direction radial, making the force applied when applying torsion more stable. The connection point between the connecting arm 3 and the torque limiting part 2 starts axially from the root of the blocking protrusion ring 2.1. This design makes the connection structure more stable, and the torsion force can be applied to the connecting arm 3 accordingly.

[0035] The threaded engagement portion 1 is further subdivided into an upper operating portion 1.1 and a lower guide portion 1.2: the upper operating portion 1.1 has a torque transmission outer surface and an inner surface with internal threads, which facilitates the application of torque during construction. In the illustrated embodiment, a conventional hexagonal outer wall is used, but it can also be any shape that can be clamped by a clamping tool; the lower guide portion 1.2 does not have internal threads, so the non-engaging bolt mainly undertakes the guiding and mating functions, and its inner diameter forms a radial gap of 0.1-0.5mm with the mating fastener 4. The torque limiting portion 2 is arranged around the guide portion 1.2.

[0036] Based on the above-mentioned overload protection fastening components, a bathroom equipment installation structure can be formed, the core components of which include the base component 5, the overload protection fastening components and the fasteners 4, and an axial limiting component is also provided to improve installation stability.

[0037] The specific installation method is as follows: The base component 5 is the toilet body, which is provided with a mounting through hole 5.1. After the fastener 4 passes through the mounting through hole 5.1, it forms an axial thread engagement with the threaded joint 1 of the overload fastening component, thereby fixing the relevant components such as the hinge structure of the toilet lid to the base component 5.

[0038] The axial limiting component is a washer 6 located between the overload protection fastening component and the base component 5.

[0039] To ensure the limiting effect and cover the torque limiting part 2, the outer diameter of the washer 6 is designed to be 1.2-2 times larger than the maximum outer diameter of the torque limiting part 2, which can effectively limit axial displacement and at the same time avoid the problem of loosening or falling off after the torque limiting part 2 is separated.

[0040] The above description only illustrates the preferred embodiment of this utility model and should not be construed as limiting the claims. This utility model is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of this utility model are also within the scope of protection of this utility model.

Claims

1. An overload prevention fastening assembly characterized by include: The threaded engagement part (1) has an internal thread that mates with the fastener (4); The torque limiting part (2) is fixedly connected to the threaded engagement part (1); and when the torque applied between the torque limiting part (2) and the threaded engagement part (1) exceeds a threshold, the torque limiting part (2) separates from the threaded engagement part (1).

2. The overload protection fastening assembly according to claim 1, characterized in that: The torque limiting part (2) is arranged around the threaded joint part (1), and multiple connecting arms (3) are arranged at intervals around the threaded joint part (1) between the torque limiting part (2) and the threaded joint part (1). The two ends of the connecting arms (3) are respectively connected to the torque limiting part (2) and the threaded joint part (1).

3. The anti-overload fastener assembly according to claim 2, wherein: The cross-sectional area of ​​the connecting arm (3) decreases from the torque limiting part (2) toward the threaded joint part (1).

4. The anti-overload fastener assembly according to claim 2, wherein: The threaded engagement portion (1) includes: an upper operating portion (1.1) having a torque transmission outer surface and an inner surface having an internal thread; a lower guide portion (1.2) having an inner diameter that forms a radial clearance with the mating fastener (4), and the torque limiting portion (2) being disposed around the guide portion (1.2).

5. The anti-overload fastener assembly according to claim 4, wherein: The torque limiting part (2) is a polygonal collar, and each side is connected to the guide part (1.2) through at least one connecting arm (3). The direction of the connecting arm (3) is perpendicular to the side of the torque limiting part (2) and points to the axis of the guide part (1.2).

6. The anti-overload fastener assembly according to claim 5, wherein: The top of the torque limiting part (2) extends radially outward to form a blocking protrusion (2.1).

7. The overload protection fastening assembly according to claim 6, characterized in that: The connection point between the connecting arm (3) and the torque limiting part (2) starts axially at the root of the blocking convex ring (2.1).

8. The anti-overload fastener assembly according to any of claims 1-7, wherein: The separation torque threshold between the torque limiting part (2) and the threaded joint part (1) is 1-10 N·m.

9. A sanitary equipment mounting structure characterized by include: The base component (5) is provided with mounting through holes (5.1); The overload protection fastening assembly according to any one of claims 1-7; the fastener (4) passes through the mounting through hole (5.1) and forms an axial threaded engagement with the overload protection fastening assembly in the mounting through hole (5.1).

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