Sealing type combined nut

Abstract

The utility model discloses a sealing type combined nut, and relates to the technical field of sealing structures, the sealing type combined nut comprises a metal nut, and an internal thread in a penetrating state is arranged in the metal nut; the plastic shell is fixed to the outer side of the outer wall of the metal nut through a limiting mechanism. The rubber mat component is fixedly combined below the plastic shell and the metal nut, the outer end of the rubber mat component protrudes out of the plastic shell and the metal nut, and the rubber mat component is used for providing a sealing function; wherein the outer wall of the plastic shell is also provided with a plastic neck, and the plastic neck is provided with a groove structure. According to the sealing type combined nut, the manufacturing process can be simplified, and the sealing performance can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing structures, and particularly relates to a sealed combined nut. Background Art

[0002] Most of the existing nut structures are made of all-metal materials, manufactured by machining, and the sealing function is realized by pasting a sponge ring or a rubber ring; there are many problems in the processing of this traditional metal nut. Due to the large processing difficulty of all-metal materials, the manufacturing cost is high, the production process is complex and time-consuming; secondly, the self-weight of the nut is large, which is not conducive to some applications that require weight reduction, especially in the automotive industry, increasing energy consumption; in addition, the traditional sealing method mostly relies on additional sealing materials, fixed by pasting, with a limited service life, unstable sealing effect, and easy to fail when subjected to external stress or temperature changes, thus reducing the performance and service life of the product; therefore, there is an urgent need in the prior art for a nut structure solution that can simplify the manufacturing process and improve the sealing performance. Summary of the Utility Model

[0003] An embodiment of the present application provides a sealed combined nut, and the main purpose is to realize a nut structure solution that can simplify the manufacturing process and improve the sealing performance.

[0004] To achieve the above purpose, an embodiment of the present application provides a sealed combined nut, including:

[0005] A metal nut, with an internally threaded hole in a through state provided therein;

[0006] A plastic shell, fixed to the outer wall of the metal nut through a limiting mechanism;

[0007] A rubber pad component, fixedly combined below the plastic shell and the metal nut, with the outer end of the rubber pad component protruding from the plastic shell and the metal nut, and the rubber pad component is used to provide a sealing function;

[0008] Wherein a plastic neck is further provided on the outer wall of the plastic shell, and a groove structure is provided on the plastic neck.

[0009] In a feasible embodiment, the metal nut includes an upper nut end face and a lower threaded end face; and further includes: a stepped side face, in a stepped shape, protruding from the outer wall of the side of the lower threaded end face; and restricted within the plastic shell; a restricting surface, provided on the end face of the stepped side face facing the upper nut end face side.

[0010] In a feasible implementation, the plastic shell further includes: a plastic head sleeved on the outer side of the upper end face of the nut. The plastic head is provided with a head upper plane and a head lower plane. The head lower plane is connected to the neck side surface on the plastic neck. The head side surface is arranged between the head upper plane and the head lower plane and protrudes from the neck side surface; a plastic bottom sleeved on the outer wall of the step side surface.

[0011] In a feasible implementation, the plastic bottom is further provided with a bottom upper plane and a bottom lower plane. The plastic bottom further includes: a bottom sunken bottom surface, which is the horizontal inner wall of the inner cavity located inside the plastic bottom; a bottom sunken side surface, which is the side wall of the inner cavity located inside the plastic bottom. Wherein the bottom sunken bottom surface and the bottom sunken side surface jointly enclose a bottom enclosure inner hole, and the step side surface and the limiting surface are both clamped in the bottom enclosure inner hole.

[0012] In a feasible implementation, the limiting mechanism includes: a nut protrusion arranged on the side wall of the metal nut, and the nut protrusion is clamped with a nut depression; a depression on the inner hole of the shell, which is arranged on the inner wall of the opening formed in the middle of the plastic shell and corresponds to the position of the nut protrusion; a protrusion on the inner hole of the shell, which is arranged on the inner wall of the opening formed in the middle of the plastic shell and corresponds to the position of the nut depression.

[0013] In a feasible implementation, the plastic bottom further includes: a bottom sunken side enclosure located on the bottom lower plane; a bottom enclosure bottom surface, which is the bottom end face of the bottom sunken side enclosure.

[0014] In a feasible implementation, the rubber pad component is a soft rubber ring or an annular pad. Wherein the soft rubber ring includes: a rubber ring annular plane connected to the bottom lower plane; an outer side surface of the rubber ring skirt; which is arranged in an inclined state and connected to the rubber ring annular plane; an inner side surface of the rubber ring skirt, and the inner side surface of the rubber ring skirt is connected to the other side of the rubber ring annular plane; a bottom of the rubber ring skirt, which is located at the bottom end of the soft rubber ring, and the bottom of the rubber ring skirt is connected between the outer side surface of the rubber ring skirt and the inner side surface of the rubber ring skirt.

[0015] In a feasible implementation, a lower plane groove is further arranged on the bottom lower plane; a rubber ring protrusion is further arranged on the top end face of the rubber ring annular plane, and the rubber ring protrusion can be combined in the lower plane groove.

[0016] In a feasible implementation, the annular pad includes a pad upper plane, a pad inner side surface and an annular pad inner hole. Wherein the pad upper plane is connected to the bottom lower plane; the pad inner hole is sleeved on the outer side of the bottom sunken side enclosure.

[0017] In a feasible embodiment, the horizontal cross-sectional profile of the limiting mechanism is a polygonal or circular structure; the limiting mechanism also includes: a plurality of protrusions arranged along the circumferential direction on the outer wall of the metal nut; and / or a portion of the bottom surface of the bottom enclosure that vertically blocks the bottom end face of the metal nut.

[0018] A sealed combination nut provided in the present application replaces the structure of a traditional all-metal nut by combining a metal nut with a plastic shell, which not only greatly reduces the product's own weight and reduces energy consumption, but is also particularly suitable for weight-sensitive fields such as automotive interior and exterior decoration; at the same time, the plastic shell and the soft rubber ring are combined through an injection molding process, which simplifies the production process. Compared with the traditional pasting method, the production efficiency is significantly improved and the manufacturing cost is reduced; the soft rubber ring or annular gasket used in this solution has excellent sealing performance, can remain stable during long-term use, and is not easily invalidated due to external force or environmental changes, thereby greatly improving the service life and reliability of the product; it can be seen that the utility model not only reduces the manufacturing difficulty, but also optimizes product performance, and has significant market application advantages. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The structure diagram of the three-dimensional explosion of the sealed combination nut provided in the embodiment of the present application is shown. Figure 1 ;

[0020] Figure 2 The structure diagram of the three-dimensional explosion of the sealed combination nut provided in the embodiment of the present application is shown. Figure 2 ;

[0021] Figure 3 The structure diagram of the assembled nut provided in the embodiment of the present application is shown in FIG. Figure 1 ;

[0022] Figure 4 The structure diagram of the assembled nut provided in the embodiment of the present application is shown in FIG. Figure 2 ;

[0023] Figure 5 A schematic cross-sectional structure diagram of a combination nut provided in an embodiment of the present application is shown;

[0024] Figure 6 A schematic diagram of the main structure of the combination nut provided in an embodiment of the present application is shown;

[0025] Figure 7 Shows Figure 6 Schematic diagram of the cross-sectional structure at the middle BB;

[0026] Figure 8 It shows a schematic diagram of the front view of the structure of the combination nut provided in the embodiment of the present application in the assembled state;

[0027] Figure 9 Shows a schematic structural diagram of the bottom lower plane provided by an embodiment of the present application;

[0028] Figure 10 Shows a schematic structural diagram of the annular pad provided by an embodiment of the present application;

[0029] Figure 11 Shows a schematic structural diagram of the plastic bottom provided by an embodiment of the present application;

[0030] Figure 12 Shows Figure 8 The cross-sectional structural diagram at A-A in;

[0031] Figure 13 Shows a schematic structural diagram of the bump provided by an embodiment of the present application;

[0032] Figure 14 Shows a schematic structural diagram of the limiting component being polygonal provided by an embodiment of the present application;

[0033] Figure 15 Shows a schematic structural diagram of the bottom enclosure bottom surface provided by an embodiment of the present application.

[0034] In the figure: 100, metal nut, 101, internal thread, 102, upper end surface of the nut, 103, nut protrusion, 104, nut depression, 105, limiting surface, 106, stepped side surface, 107, lower end surface of the thread, 200, plastic shell, 201, depression on the inner hole of the shell, 202, protrusion on the inner hole of the shell, 210, plastic head, 211, upper plane of the head, 212, lower plane of the head, 213, side surface of the head, 220, plastic neck, 221, side surface of the neck, 230, plastic bottom, 231, upper plane of the bottom, 232, bottom surface of the bottom sink, 233, side surface of the bottom sink, 234, side enclosure of the bottom sink, 235, lower plane groove, 236, bottom lower plane, 237, bottom enclosure bottom surface, 238, inner hole of the bottom enclosure, 300, soft rubber ring, 301, annular plane of the rubber ring, 302, rubber ring protrusion, 303, outer side surface of the rubber ring skirt, 304, bottom of the rubber ring skirt, 305, inner side surface of the rubber ring skirt, 400, annular pad, 401, upper plane of the pad, 402, inner side surface of the pad, 403, inner hole of the pad. Detailed implementation manners

[0035] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below through the accompanying drawings and specific embodiments. It should be understood that the specific features in the embodiments of this specification and the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. Without conflict, the technical features in the embodiments of this specification and the embodiments can be combined with each other.

[0036] In this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. The term "more than two" includes two or more than two cases.

[0037] Most of the existing nut structures are made of all-metal materials, manufactured by machining, and the sealing function is achieved by pasting a sponge ring or a rubber ring; there are many problems in the processing of this traditional metal nut. Due to the large processing difficulty of all-metal materials, the manufacturing cost is high, the production process is complex and time-consuming; secondly, the self-weight of the nut is large, which is not conducive to some application occasions that require weight reduction, especially in the automotive industry, increasing energy consumption; in addition, the traditional sealing method mostly relies on additional sealing materials, fixed by pasting, with a limited service life, unstable sealing effect, and is easy to fail when subjected to external stress or temperature change, thus reducing the performance and service life of the product.

[0038] In view of this, the present application provides a nut structure solution that can both simplify the manufacturing process and improve the sealing performance.

[0039] As Figures 1 to 15 shown, an embodiment of the present application provides a sealed combined nut, comprising: a metal nut 100, a plastic shell 200 and a gasket component. An internally threaded portion 101 in a penetrating state is provided inside the metal nut 100; the plastic shell 200 is fixed to the outer wall of the metal nut 100 through a limiting mechanism; the gasket component is fixedly combined below the plastic shell 200 and the metal nut 100, and the outer end of the gasket component protrudes from the plastic shell 200 and the metal nut 100. The gasket component is used to provide a sealing function, and a plastic neck 220 is further provided on the outer wall of the plastic shell 200, and a groove structure is provided on the plastic neck 220.

[0040] The present application provides a sealed combined nut, which includes three components that can be combined and has the functions of sealing and interconnecting. Specifically, one of them is the metal nut 100. The internal thread 101 inside the metal nut 100 is used to connect with other components, realizing reliable mechanical fixation through the internal thread 101, and at the same time, the through design ensures the installation stability of the nut. The second one is the plastic shell 200, which is coated on the outer wall of the metal nut 100. The limiting mechanism ensures a firm combination between the two, preventing relative sliding or loosening and maintaining the stability of the overall structure. It should be noted that the plastic shell 200 can be formed on the outside of the nut by injection molding. The present application also includes a rubber pad component, which is located at the bottom of the nut and the plastic shell 200. The protruding structure at its outer end not only improves the overall sealing effect but also provides additional buffering and compressive resistance during installation, ensuring that the combined nut can maintain its sealing performance when subjected to external forces.

[0041] The outer wall of the plastic shell 200 is also provided with a plastic neck 220. Its groove structure cooperates with the rubber pad component to provide additional sealing support at multiple positions respectively, and its weight is reduced, further enhancing the sealing performance of the nut in different environments. In addition, the combination of the rubber pad component and the plastic neck 220 enables the nut to maintain the sealing effect unchanged when stressed or deformed, avoiding leakage of liquid or gas. Therefore, through the combination of metal, plastic, and flexible rubber pad, the nut can not only maintain strength and stability but also have excellent sealing performance, while reducing weight, lowering production costs, improving production efficiency, and enhancing the durability of the sealing effect.

[0042] As Figure 7 shown, in some examples, furthermore, the metal nut 100 includes a nut upper end face 102 and a thread lower end face 107; it also includes: a limiting surface 105 and a stepped side face 106. The stepped side face 106 is stepped and protrudes from the outer side of the side wall of the thread lower end face 107; and is restricted within the plastic shell 200; the limiting surface 105 is arranged on the end face of the stepped side face 106 facing the nut upper end face 102.

[0043] In this example, the metal nut 100 in the sealed combined nut ensures the stability and functionality of the structure. Specifically, the upper end face of the nut and the lower end face of the thread 107 are located at the top and bottom of the metal nut 100 respectively, mainly used to cooperate with the connection and fixation of other components. The stepped side face 106 of the metal nut 100 is stepped, which makes its lateral outer wall protrude beyond the lower end face of the thread 107, effectively increasing the contact area between the nut and the plastic shell 200, ensuring that the nut can be firmly restricted within the plastic shell 200 without sliding or rotating. The stepped side face 106 is designed to be restricted inside the plastic shell 200, ensuring that the metal nut 100 remains in a stable position within the plastic shell 200 and will not be displaced by external forces. The restricting surface 105 is provided on the side of the stepped side face 106 facing the upper end face 102 of the nut, further preventing the nut from moving in the longitudinal direction. Applying the technology of this example, the nut can effectively transfer the force to the plastic shell 200 when subjected to torsion or pressure, while maintaining the integrity of the overall structure. It enhances the mechanical properties of the combined nut, reduces the processing and assembly difficulty, makes the connection between the nut and the shell more firm, and thus significantly improves the service life and sealing effect of the product.

[0044] As Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 11 , Figure 12 and Figure 15 As shown in, for example, Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 11 , Figure 12 and Figure 15 , in some examples, furthermore, the plastic shell 200 further includes: a plastic head 210 and a plastic bottom 230. The plastic head 210 is sleeved outside the upper end face 102 of the nut. The plastic head 210 is provided with a head upper plane 211 and a head lower plane 212. The head lower plane 212 is connected to the neck side face 221 on the plastic neck 220. The head side face 213 is provided between the head upper plane 211 and the head lower plane 212 and protrudes beyond the neck side face 221. The plastic bottom 230 is sleeved outside the outer wall of the stepped side face 106.

[0045] In this example, the plastic shell 200 is made of a lightweight structural material; the plastic head 210 is sleeved on the outer side of the upper end face of the metal nut 100 to ensure that the top of the metal nut 100 is isolated from the external environment; the head side 213 between the upper plane and the lower plane of the plastic head 210 protrudes, forming a reinforcement structure that enables the plastic head 210 to withstand greater pressure when stressed and prevents deformation; the lower plane 212 of the head is connected to the neck side 221 of the plastic neck 220, and the neck side 221 is located in a smaller middle area, further enhancing the sealing effect and reducing the processing difficulty; the plastic bottom 230 is sleeved on the outer wall of the step side 106 and forms a tight fit with the step side 106, which not only further fixes the relative position of the plastic shell 200 and the metal nut 100 but also prevents the erosion of the external environment on the bottom of the nut; through the combined setting of the plastic head 210, the neck, and the bottom, the plastic shell 200 can effectively wrap the metal nut 100 and disperse at different stress points, effectively improving the stability and sealing performance of the nut during long-term use; through the division of labor and cooperation of different parts, not only the strength of the product is ensured, but also the sealing effect is enhanced. Especially under multiple external forces, it can effectively prevent the nut from loosening or failing.

[0046] As Figure 2 , Figure 7 and Figure 15 shown, in some examples, furthermore, a bottom upper plane 231 and a bottom lower plane 236 are also provided on the plastic bottom 230. The plastic bottom 230 further includes: a bottom sunk bottom surface 232 and a bottom sunk side surface 233. The bottom sunk bottom surface 232 is located on the horizontal inner wall of the inner cavity within the plastic bottom 230; the bottom sunk side surface 233 is located on the side wall of the inner cavity within the plastic bottom 230. The bottom sunk bottom surface 232 and the bottom sunk side surface 233 together enclose a bottom enclosure inner hole 238, and the step side 106 and the limiting surface 105 are both clamped in the bottom enclosure inner hole 238.

[0047] In this example, the plastic bottom 230 further ensures the stability of the combined nut through the cooperation of multiple planes with the counterbore structure; the upper plane and the lower plane of the plastic bottom 230 both protrude from the side surface 213 of the head. Such a protruding design not only increases the contact area of the plastic bottom 230 but also provides additional support and protection, ensuring that the plastic shell 200 is not easily deformed when stressed; the bottom surface 232 of the counterbore is located on the horizontal inner wall of the inner cavity within the plastic bottom 230. As a bearing surface, it provides stable support for the metal nut 100 and other internal structures; the side surface 233 of the counterbore is located on the side wall of the inner cavity and forms an enclosing structure together with the bottom surface, namely the inner hole 238 of the bottom enclosure, which has the function of locking the stepped side surface 106 and the limiting surface 105 of the metal nut 100; the stepped side surface 106 and the limiting surface 105 are clamped in the inner hole 238 of the bottom enclosure, ensuring the fixed position of the metal nut 100 in the plastic shell 200 and preventing its relative displacement when stressed or vibrated; at the same time, the clamping design of the inner hole of the enclosure makes the installation and fixation of the nut more convenient and enhances its stability under high-load conditions.

[0048] Therefore, through the above settings in this example, the plastic bottom 230 not only provides all-round support and fixation for the metal nut 100 but also effectively disperses the force conduction, prevents the relative sliding between the nut and the plastic shell 200, and thus improves the impact resistance and sealing performance of the overall structure.

[0049] As Figure 1 、 Figure 2 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 9 、 Figure 10 and Figure 12 shown, in some examples, furthermore, the limiting mechanism includes: a nut protrusion 103, a nut depression 104, a depression 201 on the inner hole of the shell, and a protrusion 202 on the inner hole of the shell, which are arranged on the side wall of the metal nut 100, and the nut protrusion 103 is clamped with the nut depression 104; the depression 201 on the inner hole of the shell is arranged on the inner wall of the opening formed in the middle of the plastic shell 200 and corresponds to the position of the nut protrusion 103; the protrusion 202 on the inner hole of the shell is arranged on the inner wall of the opening formed in the middle of the plastic shell 200 and corresponds to the position of the nut depression 104.

[0050] In this example, the limiting mechanism realizes the precise clamping and stable fixation of the metal nut 100 and the plastic shell 200 through the nut protrusions 103, nut depressions 104, and the concave-convex structure on the inner hole of the plastic shell 200; multiple protrusions of the metal nut 100 are arranged on the side wall, and depressions are formed between adjacent protrusions to provide mating positions with the concave-convex structure on the inner hole of the plastic shell 200; this clamping method allows the nut protrusions 103 to correspond to the depressions on the inner hole of the plastic shell 200, thereby achieving mechanical engagement and ensuring the firm combination of the metal nut 100 and the plastic shell 200; the depressions 201 on the inner hole of the shell are arranged on the inner wall of the central opening of the plastic shell 200, and these depressions are precisely aligned with the protrusion positions of the metal nut 100, enabling the nut to be smoothly inserted into the plastic shell 200 and locked during the assembly process to prevent any longitudinal displacement or loosening; at the same time, the protrusions 202 on the inner hole of the shell correspond to the nut depressions 104, further enhancing the tightness and stability of the structure through the mutual engagement of the convex and concave; the design principle of the limiting mechanism in this example is to achieve mechanical fixation at multiple points through precise structural alignment, thereby avoiding relative sliding or rotation between the metal nut 100 and the plastic shell 200, especially being able to effectively maintain its fixed state when subjected to external forces; improving the service life and impact resistance of the product and ensuring its reliability under various working conditions.

[0051] As Figure 2 , Figure 7 and Figure 15 shown, in some examples, furthermore, the plastic bottom 230 further includes: a bottom sunken side enclosure 234 and a bottom enclosure bottom surface 237. The bottom sunken side enclosure 234 is located on the bottom lower plane 236; the bottom enclosure bottom surface 237 is the bottom end face of the bottom sunken side enclosure 234.

[0052] It can be understood that through the combination of the bottom sunken side enclosure 234 and the bottom enclosure bottom surface 237 of the plastic bottom 230, the fixation and sealing between the plastic shell 200 and the metal nut 100 are further enhanced; the bottom sunken side enclosure 234 is located on the lower plane of the plastic bottom 230. As a protruding structure, it not only provides additional support but also forms a wrapping restriction area that can effectively surround the stepped side surface 106 of the metal nut 100 and the restriction surface 105 to prevent its lateral or longitudinal movement; the bottom enclosure bottom surface 237 is located at the bottom end of the bottom sunken side enclosure 234, ensuring a stable position of the metal nut 100 in the inner cavity of the plastic bottom 230 by providing a solid support surface and avoiding displacement or loosening when subjected to external forces; the enclosure structure forms a multiple restriction and fixation effect through precise cooperation with the nut, keeping the nut and the plastic shell 200 tightly connected.

[0053] As Figure 7 ,Figure 10 and Figure 12 As shown, in some examples, further, the rubber pad component is a soft rubber ring 300 or an annular pad 400;

[0054] The soft rubber ring 300 includes: a rubber ring annular plane 301, an outer side surface of the rubber ring skirt 303, a bottom of the rubber ring skirt 304, and an inner side surface of the rubber ring skirt 305. The rubber ring annular plane 301 is connected to the lower plane 236 of the bottom; the outer side surface of the rubber ring skirt 303 is arranged in an inclined state and connected to the rubber ring annular plane 301; the inner side surface of the rubber ring skirt 305 is connected to the other side of the rubber ring annular plane 301; the bottom of the rubber ring skirt 304 is located at the bottom end of the soft rubber ring 300, and the bottom of the rubber ring skirt 304 is connected between the outer side surface of the rubber ring skirt 303 and the inner side surface of the rubber ring skirt 305.

[0055] In this example, the soft rubber ring 300 provides excellent sealing performance and structural support; specifically, the rubber ring annular plane 301 is tightly connected to the lower plane of the plastic bottom 230 to ensure the stable fixation of the soft rubber ring 300 on the plastic shell 200; the outer side surface of the rubber ring skirt 303 is in an inclined state and extends outward from the annular plane. This inclined design enables the rubber ring to deform naturally when subjected to external pressure, thus better fitting the surrounding components and providing a flexible sealing effect; the inner side surface of the rubber ring skirt 305 strengthens its sealing ability in the compressed state, and enables the inner and outer side surfaces to work together to form a stable sealing structure; the bottom of the rubber ring skirt 304 is located at the bottom end of the soft rubber ring 300 and connects the inner and outer side surfaces. Through this position design, it can effectively disperse external stress when subjected to pressure, so that the entire soft rubber ring 300 will not be easily damaged or deformed when bearing external forces, thereby maintaining its long-term sealing effect; through the inclination of the inner and outer side surfaces and the load-bearing design of the bottom, this structure not only improves the deformation ability and adaptability of the seal in the working state, but also enhances the compressive performance through the application of flexible materials, effectively avoiding the leakage of gas or liquid, thus achieving a more reliable sealing effect and a longer service life.

[0056] As Figure 7 shown, in some examples, further, a lower plane groove 235 is also provided on the lower plane 236 of the bottom; a rubber ring protrusion 302 is also provided on the top end surface of the rubber ring annular plane 301, and the rubber ring protrusion 302 can be combined in the lower plane groove 235.

[0057] In this example, it can be understood that the lower plane groove 235 on the bottom lower plane 236 cooperates with the rubber ring protrusion 302 on the rubber ring annular plane 301 to form a stable clamping structure; the rubber ring protrusion 302 is set through its top end face to accurately engage with the lower plane groove 235, ensuring that the soft rubber ring 300 can be firmly fixed on the lower plane of the plastic shell 200; this combination of protrusion and groove not only improves the stability of the rubber ring, but also effectively prevents the soft rubber ring 300 from sliding and shifting during assembly or work; because the cooperation between the protrusion and the groove has a certain elasticity and clamping force, rapid positioning can be achieved during installation, and sufficient tensile and compressive resistance can be provided when subjected to force.

[0058] When the combination nut is subjected to external pressure or torque, the rubber ring protrusion 302 and the lower plane groove 235 can jointly disperse these forces to ensure that the soft rubber ring 300 remains in its position while preventing the seal from detaching or loosening; through this clamping structure, the sealing performance of the soft rubber ring 300 is further enhanced, especially in a dynamic environment, and can effectively prevent the leakage of liquid or gas; improve the assembly efficiency and reliability of the product, and strengthen the fixing and anti-detachment functions of the seal.

[0059] In some examples, further, the annular cushion 400 includes an upper cushion plane 401, an inner cushion surface 402, and an inner hole of the annular cushion 400, wherein the upper cushion plane 401 is connected to the bottom lower plane 236; the inner hole 403 of the cushion is sleeved on the outer side of the bottom sink side enclosure 234.

[0060] In this example, the rubber pad component is an annular pad 400; the annular pad 400 also provides additional support and sealing functions for the sealed combination nut; the upper plane 401 of the pad is tightly connected to the lower plane of the plastic bottom 230, ensuring that the annular pad 400 can be firmly fixed to the bottom of the nut, thereby playing a role of stable support and sealing; the inner hole 403 of the pad is sleeved on the outside of the bottom sink platform side enclosure 234, so that the annular pad 400 can tightly cover the bottom sink platform side enclosure 234; ensure that the annular pad 400 forms a complete sealing structure between the plastic shell 200 and the bottom sink platform to prevent the external environment from affecting the internal structure of the nut; at the same time, the tight sleeve between the inner hole 403 of the pad and the bottom sink platform side enclosure 234 ensures that the pad will not detach when under pressure.

[0061] like Figure 1 As shown in the figure, in some examples, further, the horizontal cross-sectional profile of the limiting mechanism is a polygonal or circular structure; the limiting mechanism also includes: a plurality of protrusions arranged along the circumferential direction on the outer wall of the metal nut 100; and / or a bottom enclosure bottom surface 237 that vertically blocks the portion of the bottom end surface of the metal nut 100.

[0062] In this example, the limiting mechanism is used to restrict the relative movement or positional offset between the metal nut and the plastic shell, so as to provide a better fixing effect. The shape of the metal nut can be polygonal or circular, which is not specifically limited in this example. When the shape of the metal nut is polygonal, it can effectively restrict the rotation of the metal nut 100 around its own axis direction within the plastic shell 200. In addition, since the bottom of the metal nut 100 is located within the bottom surface 237 of the bottom enclosure, when the metal nut 100 is subjected to a downward force, the part of the bottom surface 237 of the bottom enclosure that covers the bottom end face of the metal nut 100 prevents the metal nut 100 from axially detaching from the plastic shell 200. At the same time, the limiting mechanism can also achieve limiting through a plurality of independent convex points distributed in the circumferential direction, which can provide a reliable limiting effect without increasing the overall complexity. Each convex point functions independently, enabling the component to be evenly supported and restricted in the circumferential direction, avoiding wear or deformation caused by irregular forces. Similarly, it can also effectively prevent the metal nut 100 from detaching from the plastic shell 200 when subjected to a downward force. Those skilled in the art can reasonably select as needed.

[0063] The above are only examples of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the scope of the claims of the present application.

Claims

1. A sealed combined nut, characterized in that, Comprising: A metal nut (100) with an internally threaded hole (101) running through it. A plastic shell (200) fixed to the outer wall of the metal nut (100) by a limiting mechanism. A rubber pad component fixed and combined below the plastic shell (200) and the metal nut (100), with the outer end of the rubber pad component protruding beyond the plastic shell (200) and the metal nut (100), and the rubber pad component being used to provide a sealing function. Wherein a plastic neck (220) is further provided on the outer wall of the plastic shell (200), and a groove structure is provided on the plastic neck (220).

2. The sealed combined nut according to claim 1, characterized in that: The metal nut (100) includes a nut upper end face (102) and a threaded lower end face (107); it further includes: A stepped side face (106), which is stepped and protrudes beyond the outer wall of the side of the threaded lower end face (107); and is restricted within the plastic shell (200). A limiting face (105) provided on the end face of the stepped side face (106) facing the nut upper end face (102).

3. A sealed combined nut according to claim 2, characterized in that: The plastic shell (200) further includes: A plastic head (210) sleeved on the outside of the nut upper end face (102), with a head upper plane (211) and a head lower plane (212) provided on the plastic head (210), the head lower plane (212) being connected to a neck side face (221) on the plastic neck (220), and a head side face (213) being provided between the head upper plane (211) and the head lower plane (212) and protruding beyond the neck side face (221). A plastic bottom (230) sleeved on the outer wall of the stepped side face (106).

4. The sealed combined nut according to claim 3, wherein: A bottom upper plane (231) and a bottom lower plane (236) are further provided on the plastic bottom (230), and the plastic bottom (230) further includes: A bottom sunken bottom surface (232), which is the horizontal inner wall of the inner cavity within the plastic bottom (230). A bottom sunken side face (233), which is the side wall of the inner cavity within the plastic bottom (230). Wherein the bottom sunken bottom surface (232) and the bottom sunken side face (233) jointly enclose a bottom enclosure inner hole (238), and both the stepped side face (106) and the limiting face (105) are clamped within the bottom enclosure inner hole (238).

5. The sealed combined nut according to claim 4, characterized in that: The limiting mechanism includes: A nut protrusion (103) arranged on the side wall of the metal nut (100), and the nut protrusion (103) is clamped with a nut depression (104). A depression (201) on the inner hole of the shell, which is provided on the inner wall of an opening formed in the middle of the plastic shell (200) and corresponds to the position of the nut protrusion (103). A protrusion (202) on the inner hole of the shell, which is provided on the inner wall of an opening formed in the middle of the plastic shell (200) and corresponds to the position of the nut depression (104).

6. A sealed combined nut according to claim 4, characterized in that: The plastic bottom (230) further includes: A bottom sunken side enclosure (234) located on the bottom lower plane (236). The bottom surface of the bottom enclosure (237) is the bottom end face of the bottom sunken platform side enclosure (234).

7. A sealed combined nut according to claim 6, characterized in that: The rubber pad component is a soft rubber ring (300) or an annular pad (400), and the soft rubber ring (300) includes: A rubber ring annular plane (301) connected to the bottom lower plane (236); The outer side surface of the rubber ring skirt (303), which is arranged in an inclined state and connected to the rubber ring annular plane (301); The inner side surface of the rubber ring skirt (305), and the inner side surface of the rubber ring skirt (305) is connected to the other side of the rubber ring annular plane (301); The bottom of the rubber ring skirt (304) is located at the bottom end of the soft rubber ring (300), and the bottom of the rubber ring skirt (304) is connected between the outer side surface of the rubber ring skirt (303) and the inner side surface of the rubber ring skirt (305).

8. A sealed combined nut according to claim 7, characterized in that: A lower plane groove (235) is further provided on the bottom lower plane (236); A rubber ring protrusion (302) is further provided on the top end face of the rubber ring annular plane (301), and the rubber ring protrusion (302) can be combined in the lower plane groove (235).

9. A sealed combined nut according to claim 7, characterized in that: The annular pad (400) includes a pad upper plane (401), a pad inner side surface (402) and an inner hole of the annular pad (400), wherein the pad upper plane (401) is connected to the bottom lower plane (236); the inner hole of the pad (403) is sleeved on the outer side of the bottom sunken platform side enclosure (234).

10. A sealed combined nut according to claim 1, wherein: The horizontal cross-sectional profile of the limiting mechanism is a polygonal or circular structure; the limiting mechanism further includes: A plurality of bumps arranged on the outer wall of the metal nut (100) along the circumferential direction; and / or The part where the bottom enclosure bottom surface (237) vertically blocks the bottom end face of the metal nut (100).

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