Nut, bolt assembly and mechanical equipment

Abstract

The utility model discloses a nut, a bolt assembly and mechanical equipment, and relates to the technical field of mechanical parts. The nut comprises a nut body, the nut body is of a cylindrical structure, a first thread and a second thread are arranged on the inner wall face of the nut body, the major diameter of the second thread is larger than that of the first thread in the radial direction of the nut body, the first thread is used for being in threaded connection with a bolt, and the second thread is used for being in threaded connection with the bolt. And the second thread is used for accommodating an adhesive. The nut, the bolt assembly and the mechanical equipment can solve the problems that in the prior art, when a nut is used in cooperation with a bolt or a screw, looseness occurs, and scrap iron is generated.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical parts, and in particular to a nut, bolt assembly and mechanical equipment. Background Art

[0002] A nut, also known as a cap, is a mechanical part that, when used, needs to be mated with a bolt or screw. The threads on the inner wall of the nut are screwed together with the threads on the outer wall of the bolt or screw to tightly connect mechanical equipment and thus play a tightening role. Depending on the material, nuts can be divided into several types, such as carbon steel, stainless steel, and non-ferrous metals (such as copper).

[0003] Nuts, bolts, and screws are all commonly used fasteners in the field of manufacturing machinery. Due to mechanical vibration of the fasteners or shear force in the screw, the preload force is easily reduced, resulting in loosening between the nut and bolt or screw, and the generation of iron chips between the threads of the two. Utility Model Content

[0004] The purpose of the present application is to provide a nut, bolt assembly and mechanical equipment that can solve the problem in the prior art that nuts become loose and iron filings are generated when used in conjunction with bolts or screws.

[0005] The embodiment of the present application is implemented as follows:

[0006] In a first aspect of an embodiment of the present application, a nut is provided, comprising a nut body having a cylindrical structure. A first thread and a second thread are respectively provided on the inner wall surface of the nut body. Along the radial direction of the nut body, the major diameter of the second thread is larger than the major diameter of the first thread. The first thread is configured to threadably connect with a bolt, and the second thread is configured to accommodate an adhesive. This nut can solve the prior art problem of nuts loosening and generating iron chips when used with bolts or screws.

[0007] As an implementable embodiment, along the axial direction of the nut body, the second thread and the first thread are staggered.

[0008] As an implementation method, a connecting hole is provided on the nut body, the outer wall surface of the nut body and the second thread are connected through the connecting hole, and the cleaning agent flows into the second thread through the connecting hole.

[0009] As an implementation method, along the radial direction of the nut body, the cross-sectional shape of the nut body is circular.

[0010] As an implementable embodiment, the adhesive is thread glue.

[0011] In a second aspect of the embodiments of the present application, a bolt assembly is provided, including a bolt and the above-mentioned nut. A third thread is provided on the outer wall surface of the bolt, and the third thread is threadedly connected to the first thread of the nut, so that the bolt is threadedly connected to the nut body of the nut. This nut can solve the problems of loosening and iron filings generation when the nut is used in cooperation with a bolt or a screw rod in the prior art.

[0012] As an implementable manner, the bolt includes a rod portion and a head that are fixedly connected, and the third thread is located on the outer wall surface of the rod portion.

[0013] As an implementable manner, both the first thread and the second thread of the nut are internal threads, and the third thread is an external thread.

[0014] As an implementable manner, along the radial direction of the nut body, the cross-sectional shape of the head is polygonal.

[0015] In a third aspect of the embodiments of the present application, a mechanical device is provided, including the above-mentioned bolt assembly. This nut can solve the problems of loosening and iron filings generation when the nut is used in cooperation with a bolt or a screw rod in the prior art.

[0016] The beneficial effects of the embodiments of the present application include:

[0017] This nut includes a nut body, and the nut body is in a hollow cylindrical structure. A first thread and a second thread are respectively provided on the inner wall surface of the nut body. And, along the radial direction of the nut body, the major diameter of the second thread is greater than the major diameter of the first thread. Thus, a receiving space will exist between the outer wall surface of the bolt and the inner wall surface of the nut body, and this receiving space is located at the position where the second thread is located. Therefore, in actual use, the bolt can be first inserted into the nut body, and the bolt and the nut body can be threadedly connected by screwing. After the bolt and the nut body are threadedly connected, an adhesive can be introduced into the position where the second thread is located to improve the connection stability and reliability between the bolt and the nut body through the adhesive. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0019] Figure 1 It is a schematic structural diagram of the bolt provided by the embodiments of the present application;

[0020] Figure 2 One of the schematic structural diagrams of the nut provided by the embodiment of the present application;

[0021] Figure 3 Another schematic structural diagram of the nut provided by the embodiment of the present application;

[0022] Figure 4 The third schematic structural diagram of the nut provided by the embodiment of the present application.

[0023] Reference numerals: 10 - bolt; 11 - rod portion; 111 - third thread; 12 - head; 20 - nut; 21 - nut body; 211 - first thread; 212 - second thread; 213 - connecting hole. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some but not all of the embodiments of the present application. Usually, the components of the embodiments of the present application described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0025] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application claimed, but merely represents the selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application.

[0026] It should be noted that: like reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0027] In the description of the present application, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship when the products of the present application are normally placed. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present application. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0028] In addition, terms such as "horizontal" and "vertical" do not require the components to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0029] In the description of the present application, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" 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 or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the connection inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0030] Common nuts, bolts, and screws in daily life are all commonly used fasteners in the field of production and manufacturing machinery technology. Due to mechanical vibration of the fasteners or shear forces in the bolts and screws, it is easy to cause the preload to decrease, resulting in loosening between the nut and the bolt or screw. In addition, iron filings are likely to be generated between the threads of the two.

[0031] Please refer to Figures 1 to 4 , the embodiment of the present application provides a bolt 10 assembly, including a bolt 10 and a nut 20. A third thread 111 is provided on the outer wall surface of the bolt 10, and the third thread 111 is threadedly connected to the first thread 211 of the nut 20, so that the bolt 10 is threadedly connected to the nut body 21 of the nut 20. The nut 20 can solve the problems of loosening and iron filings generation when the nut is used in cooperation with the bolt or screw in the prior art.

[0032] It should be noted that as Figure 1 shown, the bolt 10 assembly includes a bolt 10, and a third thread 111 is provided on the outer wall surface of the bolt 10. As Figure 2 shown, the bolt 10 assembly further includes a nut 20, and a first thread 211 is provided on the inner wall surface of the nut 20. Moreover, the first thread 211 and the third thread 111 are matched, so that the third thread 111 of the bolt 10 and the first thread 211 of the nut 20 cooperate with each other, so that the bolt 10 and the nut 20 can achieve threaded connection. Of course, in other embodiments, the above bolt 10 can also be replaced by a screw, and those skilled in the art should be able to make reasonable selection and design according to the actual situation, and no specific limitation is made here.

[0033] Specifically, as Figures 2 to 4As shown, the nut 20 includes a nut body 21 which is in the shape of a hollow cylinder. On the inner wall surface of the nut body 21, a first thread 211 and a second thread 212 are respectively provided. And along the radial direction of the nut body 21, the major diameter of the second thread 212 is greater than that of the first thread 211. The first thread 211 is used for threaded connection with the bolt 10, and the second thread 212 is used for accommodating an adhesive. This nut 20 can solve the problems of loosening and generation of iron filings when the nut is used in combination with a bolt or a screw rod in the prior art.

[0034] It should be noted that, as Figures 2 to 4 shown, the nut 20 includes a nut body 21, taking the nut body 21 as the material basis. And the nut body 21 is in the shape of a hollow cylinder. Thus, a first thread 211 can be provided on the inner wall surface of the nut body 21, so as to perform threaded connection with the bolt 10 through the nut body 21, and then tightly connect the mechanical equipment, enabling the bolt 10 assembly to play a fastening role in the production and manufacturing process of the mechanical equipment.

[0035] On this basis, as Figure 3 and Figure 4 shown, a second thread 212 is provided on the inner wall surface of the nut body 21. And along the radial direction of the nut body 21, the major diameter of the second thread 212 is greater than that of the first thread 211. In this way, after the bolt 10 is threadedly connected with the nut body 21, there will be an accommodating space between the outer wall surface of the bolt 10 and the inner wall surface of the nut body 21 at the position where the second thread 212 is provided. The size of this accommodating space is the difference between the major diameter of the second thread 212 and the major diameter of the first thread 211.

[0036] Since there is an accommodating space between the outer wall surface of the bolt 10 and the inner wall surface of the nut body 21, and this accommodating space is located at the position where the second thread 212 is located. Therefore, in actual use, the bolt 10 can be first inserted into the nut body 21, and through screwing, the bolt 10 and the nut body 21 can be threadedly connected. After the bolt 10 is threadedly connected with the nut body 21, an adhesive can be introduced into the position where the second thread 212 is located, so as to improve the connection stability and reliability between the bolt 10 and the nut body 21 through the adhesive.

[0037] To sum up, the nut 20 includes a nut body 21, which has a hollow cylindrical structure. A first thread 211 and a second thread 212 are respectively provided on the inner wall surface of the nut body 21, and along the radial direction of the nut body 21, the major diameter of the second thread 212 is greater than the major diameter of the first thread 211. As a result, there is an accommodating space between the outer wall surface of the bolt 10 and the inner wall surface of the nut body 21, and this accommodating space is located at the position of the second thread 212. Therefore, in actual use, the bolt 10 can be first inserted into the nut body 21, and the bolt 10 and the nut body 21 can be threadedly connected by screwing. After the bolt 10 is threadedly connected to the nut body 21, an adhesive can be introduced into the position where the second thread 212 is located to improve the stability and reliability of the connection between the bolt 10 and the nut body 21 through the adhesive.

[0038] As an implementable method, Figure 3 and Figure 4 As shown, along the axial direction of the nut body 21, the second thread 212 and the first thread 211 are staggered (i.e., their positions are staggered with each other) to avoid the second thread 212 interfering with the threaded connection between the first thread 211 and the third thread 111. At the same time, it can also avoid the first thread 211 affecting the adhesive contained in the second thread 212 (or in the accommodating space).

[0039] As an implementation method, considering that sometimes mechanical equipment needs to be disconnected for maintenance and replacement, it is necessary to manually release the connection between the bolt 10 and the nut body 21. Although the threaded connection can be released by simply reversely twisting, the adhesive will interfere with the disassembly process. Therefore, Figures 2 to 4 As shown, a connecting hole 213 is provided on the nut body 21, and the outer wall surface of the nut body 21 and the second thread 212 are connected through the connecting hole 213, so that the cleaning agent can flow into the second thread 212 through the connecting hole 213, thereby cleaning and decomposing the adhesive contained in the second thread 212, thereby ensuring that the bolt 10 and the nut body 21 can be separated after the adhesive is removed.

[0040] In addition, during the connection process, when adhesive is introduced into the position of the second thread 212, excess adhesive can also overflow from the second thread 212 to the outside of the nut body 21 through the connection hole 213. During this process, once adhesive overflows from the connection hole 213, it can be considered that the adhesive has filled the second thread 212, and the operation of continuing to introduce adhesive into the second thread 212 can be stopped.

[0041] As an implementable method, Figure 2 and Figure 3As shown, along the radial direction of the nut body 21, the cross-sectional shape of the nut body 21 is circular. Correspondingly, along the radial direction of the nut body 21, the cross-sectional shape at the position of the third thread 111 of the bolt 10 should also be circular so that the nut body 21 matches the bolt 10. In addition, the diameter of the circular cross-sectional shape of the nut body 21 should also match the diameter of the circular cross-sectional shape of the bolt 10 so that the bolt 10 can extend into the nut body 21 for threaded connection.

[0042] As an implementable embodiment, the adhesive is thread sealant. Thread sealant, abbreviated as anaerobic adhesive, is a one-component sealing adhesive made based on the principle of oxygen inhibiting free radicals. It can be used for both bonding and sealing. When the coated surface is isolated from air and catalyzed, it can polymerize and cure rapidly at room temperature.

[0043] In this way, thread sealant can be introduced into the second thread 212 first, and then the bolt 10 and the nut body 21 are threadedly connected. At this time, the coated surface of the second thread 212 is isolated from air, and then by catalyzing the thread sealant, the thread sealant between the bolt 10 and the nut body 21 can polymerize and cure rapidly at room temperature.

[0044] As an implementable embodiment, as Figure 1 shown, the bolt 10 includes a rod portion 11 and a head portion 12 fixedly connected. The third thread 111 is located on the outer wall surface of the rod portion 11. As an implementable embodiment, the first thread 211 and the second thread 212 of the nut 20 are both internal threads, and the third thread 111 is an external thread to ensure that the third thread 111 matches the first thread 211. At the same time, the recessed portion of the second thread 212 can serve as a receiving cavity for accommodating the adhesive.

[0045] As an implementable embodiment, along the radial direction of the nut body 21, the cross-sectional shape of the head portion 12 is polygonal. By way of example, as Figure 1 shown, along the radial direction of the nut body 21, the cross-sectional shape of the head portion 12 is pentagonal. Of course, in other embodiments, the cross-sectional shape of the head portion 12 can also be quadrilateral, hexagonal, octagonal, etc. Or, the cross-sectional shape of the head portion 12 can also be circular. An installation groove is provided on the side of the head portion 12 away from the rod portion 11 to facilitate tightening the bolt 10 and the nut body 21 with the aid of tools.

[0046] The embodiment of the present application also provides a mechanical device, including the above-mentioned bolt 10 assembly. Since the structure and beneficial effects of the bolt 10 assembly have been described in detail in the foregoing embodiments, they will not be elaborated herein.

[0047] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various modifications and variations 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 protection scope of the present application.

[0048] In addition, it should be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present application will not separately describe various possible combination methods.

Claims

1. A nut, characterized in that, It includes a nut body. The nut body has a cylindrical structure. First threads and second threads are respectively provided on the inner wall surface of the nut body. Along the radial direction of the nut body, the major diameter of the second thread is greater than that of the first thread. The first thread is used for threaded connection with a bolt, and the second thread is used for accommodating an adhesive.

2. The nut according to claim 1, wherein Along the axial direction of the nut body, the second thread and the first thread are arranged in a staggered manner.

3. The nut according to claim 1, characterized in that, A connection hole is provided on the nut body. The outer wall surface of the nut body and the second thread are connected and communicated through the connection hole. A cleaning agent flows into the second thread through the connection hole.

4. The nut according to claim 1, characterized in that, Along the radial direction of the nut body, the cross-sectional shape of the nut body is circular.

5. The nut according to claim 1, characterized in that, The adhesive is thread sealant.

6. A bolt assembly, characterized in that, It includes a bolt and the nut according to any one of claims 1 to 5. Third threads are provided on the outer wall surface of the bolt. The third threads are threadedly connected with the first threads of the nut, so that the bolt is threadedly connected with the nut body of the nut.

7. The bolt assembly according to claim 6, characterized in that, The bolt includes a rod portion and a head which are fixedly connected. The third threads are located on the outer wall surface of the rod portion.

8. The bolt assembly according to claim 6, characterized in that, Both the first thread and the second thread of the nut are internal threads, and the third thread is an external thread.

9. The bolt assembly according to claim 7, characterized in that, Along the radial direction of the nut body, the cross-sectional shape of the head is polygonal.

10. A mechanical device, characterized in that, It includes the bolt assembly according to any one of claims 6 to 9.

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