Nut

Abstract

The utility model discloses a nut which comprises a body which comprises an internal thread section and a connecting section connected with the internal thread section, and a through hole penetrating through the internal thread section and the connecting section is formed in the body. The internal thread section is provided with a glue injection groove communicated with the through hole; and a first groove for glue filling is radially and concavely formed in the connecting section relative to the through hole. According to the nut, the glue injection groove communicated with the through hole is formed in the internal thread section, and the first groove used for glue injection is formed in the connecting section in the radial direction relative to the through hole in a concave mode, so that the nut has the good damping and buffering effects on the overall structure.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, in particular to a nut. Background Art

[0002] With the development of science and technology, manufacturing products are diverse, and these mechanical products usually require fasteners to connect and fix different parts.

[0003] However, during the use of these products, due to the influence of vibration, the fasteners become loose, thereby causing the connected parts to become loose, affecting the connection stability and service life of the products.

[0004] The connection stability of fasteners is particularly important for large products with safety risks. For example, vehicles such as cars, high-speed trains, and airplanes are prone to vibration, which can easily cause fasteners to loosen and cause safety risks. The connection stability of fasteners is even more important. Utility Model Content

[0005] The main purpose of the utility model is to provide a nut, comprising:

[0006] A body, comprising an internal thread segment and a connecting segment connected to the internal thread segment, wherein a through hole penetrating the internal thread segment and the connecting segment is provided in the body;

[0007] The internal thread section is provided with a glue injection groove communicating with the through hole;

[0008] The connecting section is radially recessed relative to the through hole to form a first groove for glue pouring.

[0009] In some embodiments, the glue injection groove includes a first glue injection groove, and at least one of the first glue injection grooves axially penetrates the thread of the internal thread section away from one end of the connecting section.

[0010] In some embodiments, the relationship between the aperture of the first glue injection groove d1 and the screw thread height h1 is configured as 0.2h1≤d2≤1.5h1.

[0011] In some embodiments, the glue injection grooves are distributed in a plurality in a circumferential ring shape.

[0012] In some embodiments, the glue injection groove includes a second glue injection groove, and at least one of the second glue injection grooves passes through the internal thread of the internal thread section from the outside to the inside in a radial direction to communicate with the through hole.

[0013] In some embodiments, a plurality of second glue injection grooves are provided axially at intervals, a plurality of first grooves are provided axially at intervals, and an axial spacing d3 between adjacent second glue injection grooves and an axial spacing d4 between adjacent first grooves are configured as d4<d3<2d4.

[0014] In some embodiments, a plurality of the second glue injection grooves are spaced apart along the axial direction, and a plurality of the second glue injection grooves are spaced apart along the circumferential direction. The circumferential spacing d2 between two adjacent second glue injection grooves and the axial spacing d3 between two adjacent second glue injection grooves are configured as follows: d3<d2<3d3.

[0015] The width b1 of the first groove along the axial direction and the distance d5 between adjacent screw threads are configured as d5≤b1<3d5.

[0016] In some embodiments, a second groove is recessed at one end of the connecting section away from the internal thread section, the radial dimension of the second groove is larger than the aperture of the through hole, and the second groove is used for mounting the insulating cylinder.

[0017] In some embodiments, the insulating tube is made of a flexible material, and one end of the insulating tube away from the internal thread section protrudes out of the connecting section by 0.3 mm-1 mm.

[0018] Beneficial effects of the utility model:

[0019] The nut of the utility model has a good vibration reduction and buffering effect in the overall structure by providing a glue injection groove connected to the through hole in the internal thread section and a first groove for glue injection radially concavely provided in the connecting section relative to the through hole. During the vibration process, the vibration force is usually transmitted from the connecting piece to the axial ends of the bolt assembly. In this process, since glue is injected into the first groove provided in the connecting section, most of the vibration force passing through the connecting section is buffered and absorbed, so that the vibration force reaching the internal thread section is smaller, and the connection part between the internal thread section and the bolt is less likely to loosen, and the connection stability is better. Furthermore, since the internal thread section is also provided with a glue injection groove, the vibration force of the internal thread section is further buffered and absorbed, and the vibration reduction effect is more significant.

[0020] In addition, due to the vibration damping of the connecting section, the vibration force of the bolt head is also reduced, the bolt assembly is more evenly stressed in the axial direction, and is not easy to shake, further making the connection between the bolt assembly and the connecting piece less likely to loosen. When applied to vehicles, the vibration damping setting of the nut can significantly dampen the vibration force generated by the vehicle, and the bolt assembly is not easy to loosen from the connecting piece, greatly reducing safety risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of a bolt assembly according to an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the exploded structure of a bolt assembly according to an embodiment of the present utility model;

[0023] Figure 3 for Figure 2 A cross-sectional view of

[0024] Figure 4 This is a structural schematic diagram of a nut and an insulating tube according to an embodiment of the utility model;

[0025] Figure 5 This is a schematic structural diagram of a nut according to an embodiment of the utility model;

[0026] Figure 6 It is a cross-sectional view of a nut according to an embodiment of the utility model.

[0027] Description of reference numerals:

[0028] 100. Bolt assembly;

[0029] 10. nut; 11. body; 12. internal thread section; 13. connecting section; 131. first groove; 132. second groove; 14. through hole;

[0030] 20. Bolts;

[0031] 30. Insulation tube;

[0032] c1, first glue injection groove; c2, second glue injection groove.

[0033] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0034] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0035] With respect to existing fasteners, the inventors have found that fasteners are usually made of rigid parts to ensure the structural strength and connection strength of the fasteners. However, when subjected to vibration stress, the fasteners are easily loosened from other connecting parts due to the rigid stress.

[0036] In this case, the inventors set a vibration reduction structure on the fastener so that the rigid vibration force on the fastener can be absorbed and buffered by the vibration reduction structure, thereby reducing the force on the fastener and thus reducing the looseness of the fastener.

[0037] like Figures 1 to 3 As shown, in this embodiment, the fastener is a bolt assembly 100, which includes a nut 10 and a bolt 20. The bolt 20 passes through a connecting piece (not shown), and the portion of the bolt 20 passing through the connecting piece is threadedly connected to the nut 10.

[0038] The bolt 20 includes a main body and a head connected to the main body. The radial dimension of the head is greater than the radial dimension of the main body. The main body includes an external thread section.

[0039] The nut 10 includes a body 11 , which includes an internal thread section 12 and a connecting section 13 connected to the internal thread section 12 . A through hole 14 penetrating the internal thread section 12 and the connecting section 13 is provided in the body 11 .

[0040] The internal thread section 12 is provided with a glue injection groove connected to the through hole 14. There are a plurality of glue injection grooves distributed in an annular manner along the circumference, which is beneficial to enhancing the vibration reduction effect.

[0041] like Figures 3 to 6 As shown, the glue injection groove includes a first glue injection groove c1, and at least one first glue injection groove c1 axially penetrates the thread of the internal thread section 12 away from the connecting section 13. Among them, the aperture d1 and the thread height h1 of the first glue injection groove c1 are configured as 0.2h1≤d2≤1.5h1, so as to ensure that the aperture of the first glue injection groove c1 is large for glue pouring, and the first glue injection groove c1 has a good vibration reduction effect. Preferably, the aperture d1 and the thread height h1 of the first glue injection groove c1 are configured as 0.25h1<d2<0.5h1, so that the rigid structure of the thread is relatively complete, which is conducive to better strength of the thread structure. Preferably, the thread height is greater than or equal to 0.5mm.

[0042] In this embodiment, the cross section of the first glue injection groove c1 is a cut circle, and the top width of the first glue injection groove c1 near the screw thread is greater than the bottom width for easy processing. In other embodiments, the cross section of the first glue injection groove c1 can be square, or other shapes, which are not limited here and are set as needed. In other embodiments, the top width of the first glue injection groove c1 near the screw thread can be smaller than the bottom width, so that when the glue is poured, the glue can be better retained in the first glue injection groove c1, and the screw thread at the first glue injection groove c1 can be kept more complete, thereby increasing the structural strength of the screw thread and maintaining a good thread locking force.

[0043] like Figures 3 to 6 As shown, the glue injection groove also includes a second glue injection groove c2. At least one second glue injection groove c2 radially passes through the internal thread of the internal thread section 12 from the outside to the inside to communicate with the through hole 14, so that the glue in the second glue injection groove c2 directly has a vibration reduction effect on the internal thread, further enhancing the vibration reduction effect.

[0044] Among them, the nut 10 is a cylindrical structure. During the vibration process, the nut 10 is prone to resonance effect, and the thread is easily affected by the vibration and the connection becomes loose, affecting the connection stability between the nut 10 and the bolt 20. By setting the first glue injection groove c1 and the second glue injection groove c2, the thread of the internal thread segment 12 has rigid and flexible materials, and the thread of the internal thread segment 12 is damped and buffered in both the circumferential and axial directions, and the bottom of the thread is damped and buffered, ensuring that the internal thread segment 12 has good vibration damping and buffering capabilities on the premise of having rigid strength to absorb the vibration force of the buffer thread structure, reduce the resonance effect, and increase the service life of the thread.

[0045] like Figures 3 to 6 As shown, a plurality of second glue injection grooves c2 are arranged at intervals along the axial direction, and a plurality of second glue injection grooves c2 are arranged at intervals along the circumferential direction. The circumferential spacing d2 between two adjacent second glue injection grooves c2 and the axial spacing d3 between two adjacent second glue injection grooves c2 are configured as follows: d3<d2<3d3, so that there are more second glue injection grooves c2 and the spacing is smaller, forming a honeycomb structure to enhance the vibration reduction effect. In this embodiment, the second glue injection grooves c2 are arranged at intervals along the axial direction in two rows, and the second glue injection grooves c2 are arranged at intervals along the circumferential direction in 12 rows.

[0046] like Figure 2 and Figure 5 As shown, the first glue injection groove c1 and the second glue injection groove c2 are arranged at intervals along the circumferential direction. At this time, the first glue injection groove c1 and the second glue injection groove c2 do not interfere with each other, so that the first glue injection groove c1 and the second glue injection groove c2 can perform more comprehensive vibration reduction on the internal thread segment 12 at different positions, further enhancing the vibration reduction effect on the internal thread segment 12, thereby making the nut 10 not easy to loosen and enhancing the connection stability of the nut 10.

[0047] like Figure 3 and Figure 6 As shown, in this embodiment, the cross-sectional dimension of the second glue injection groove c2 is smaller than the cross-sectional dimension of the first glue injection groove c1, so as to enhance the vibration reduction effect of the screw thread structure under the premise of ensuring the structure of the internal thread section 12. In other embodiments, the cross-sectional dimension of the second glue injection groove c2 may be greater than or equal to the cross-sectional dimension of the first glue injection groove c1, which is not limited here and is set as needed. Preferably, for the convenience of processing, the internal thread aperture of the nut 10 is greater than or equal to 20 mm, and the pitch is greater than or equal to 2 mm.

[0048] like Figures 3 to 6 As shown, a plurality of first glue injection grooves c1 and second glue injection grooves c2 are arranged at intervals along the circumferential direction, which is beneficial to strengthen the multiple vibration reduction of the internal thread section 12 and has a better vibration reduction effect.

[0049] In other embodiments, only the first glue injection groove c1 or the second glue injection groove c2 may be provided, which is not limited here and can be provided as required.

[0050] like Figure 2 , Figure 3 , Figure 4 and Figure 6As shown, the connecting section 13 is radially recessed with a first groove 131 for glue injection relative to the through hole 14. A plurality of first grooves 131 are arranged at intervals along the axial direction, and the axial spacing d3 of adjacent second glue injection grooves c2 and the axial spacing d4 of adjacent first grooves 131 are configured as d4<d3<2d4, so that more second glue injection grooves c2 and first grooves 131 are arranged under the premise of ensuring the structural strength of the nut 10, further enhancing the vibration reduction effect. The axial width b1 of the first groove 131 and the spacing d5 between adjacent screw teeth are configured as d5≤b1<3d5. The radial depth h2 of the first groove 131 and the wall thickness h3 of the connecting section 13 are configured as h2≥0.24h3, so that the first groove 131 can be injected with more glue to enhance the vibration reduction effect. The cross-sectional size of the first groove 131 is larger than the cross-sectional size of the glue injection groove, so that the vibration reduction effect of the connecting section 13 is better.

[0051] like Figure 4 As shown, in this embodiment, the first groove 131 radially passes through the wall thickness of the connecting section 13. In some embodiments, the first groove 131 can also be configured not to pass through the wall thickness of the connecting section 13 radially, and h2 is configured as 0.5d5≤h2≤1.2d5, so that the structural strength of the connecting section 13 is better.

[0052] like Figures 2 to 5 As shown, a plurality of first grooves 131 are provided at intervals along the circumferential direction, and a plurality of first grooves 131 are provided at intervals along the axial direction. The circumferential spacing d6 between two adjacent first grooves 131 and the axial spacing d4 between two adjacent first grooves 131 are configured as d4<d6<3d4, so that more first grooves 131 are provided to enhance the vibration reduction effect. In this case, the first glue injection groove c1, the second glue injection groove c2 and the first groove 131 are provided on the nut 10 to form a honeycomb structure as a whole, which forms multiple buffer absorption for the vibration force, so that the vibration reduction effect is better.

[0053] like Figures 3 to 6 As shown, a second groove 132 is recessed at one end of the connecting section 13 away from the internal thread section 12. The radial dimension of the second groove 132 is larger than the aperture of the through hole 14. The second groove 132 is used to install the insulating tube 30, so that when the bolt assembly 100 is connected to a live connector, the nut 10 and the bolt 20 are insulated, thereby reducing electrical corrosion between the nut 10 and the bolt 20 and improving the connection stability and service life of the bolt assembly 100.

[0054] like Figure 3 and Figure 6 As shown, the recessed depth d7 of the second groove 132 relative to the inner wall of the through hole 14 and the radial depth h2 of the first groove 131 are configured as d7<h2, so as to ensure that the structural strength of the nut 10 is good.

[0055] like Figure 3 and Figure 4As shown, further, the insulating cylinder 30 is made of a flexible material to have a vibration reduction effect, and one end of the insulating cylinder 30 away from the internal thread section 12 protrudes out of the connection section 13 by 0.3mm-1mm. In this case, when the nut 10 is locked on the bolt 20, the insulating cylinder 30 is compressed in the axial direction, so that the screw has a greater pressing effect on the connecting piece, thereby enhancing the connection stability between the bolt assembly 100 and the connecting piece. The inner diameter of the insulating cylinder 30 exceeds the outer diameter of the external thread of the bolt 20 by 0.1mm-0.3mm, so that when the bolt 20 passes through the nut 10, the insulating cylinder 30 is compressed radially outward, so that the nut 10 has a greater pressing force on the bolt 20, thereby enhancing the connection stability between the bolt 20 and the nut 10.

[0056] In addition, during the vibration process, the vibration force is usually transmitted from the connecting piece to the axial ends of the bolt assembly 100. In this process, since the first groove 131 provided in the connecting section 13 is filled with glue, most of the vibration force passing through the connecting section 13 is buffered and absorbed, so that the vibration force reaching the internal thread section 12 is smaller, and the connection part between the internal thread section 12 and the bolt 20 is less likely to loosen, and its connection stability is better. Further, the insulating cylinder 30 is a flexible material, such as a rubber material, so that the buffering and absorbing ability of the connecting section 13 for the vibration force is stronger. Furthermore, since the internal thread section 12 is also provided with a glue injection groove, the vibration force of the internal thread section 12 is further buffered and absorbed, and the vibration reduction effect is more significant. The setting of the first glue injection groove c1 and the second glue injection groove c2 buffers and absorbs the vibration force from the circumferential and axial directions, and the second glue injection groove c2 performs vibration reduction and buffering on the internal thread teeth, further reducing the vibration force of the internal thread section 12.

[0057] In addition, due to the vibration damping of the connecting section 13, the vibration force of the head of the bolt 20 is also reduced, and the bolt assembly 100 is subjected to more uniform force in the axial direction and is not easy to shake, further making the connection between the bolt assembly 100 and the connecting piece not easy to loosen. When applied to a vehicle, the vibration damping setting of the nut 10 can significantly dampen the vibration force generated by the vehicle, and the bolt assembly 100 is not easy to loosen from the connecting piece, greatly reducing safety risks.

[0058] In other embodiments, the main body 11 may not be provided with the connecting section 13 or the connecting section 13 may not be sufficient to provide the first groove 131 . In this case, other structures of the nut 10 are adjusted accordingly as required and are not limited here.

[0059] In this embodiment, the glue material is rubber. In some embodiments, the glue material can also be plastic or resin or other materials, which are not limited here and are set as needed.

[0060] As shown in the figure, a processing technology of a nut 10 is provided, comprising:

[0061] S1: outer contour processing, processing the outer contour of the nut 10 to form a nut to be processed;

[0062] S2: machining the through hole 14, drilling a hole in the nut to be machined to form the through hole 14;

[0063] S3: Processing the glue injection groove, drilling one end of the through hole 14 of the nut to be processed to form a glue injection groove, and pouring glue into the glue injection groove;

[0064] S4: internal thread processing, thread processing is performed on the end of the nut to be processed body having the glue injection groove to form an internal thread section 12;

[0065] S5: Processing the first groove 131 : Processing the connecting section 13 to form the first groove 131 , and pouring glue into the first groove 131 .

[0066] In some embodiments, step S1 includes:

[0067] Step S11: preparing materials, preparing a nut blank; S12: processing the outer contour of the nut blank into the outer contour of the nut 10;

[0068] In step S11, the nut blank can be a columnar structure matching the size of the nut, such as a cube or a cylinder, whose length is greater than the length of the finished nut 10 and whose cross-sectional size is greater than the cross-sectional size of the finished nut 10, so as to facilitate the processing tool holding and have a processing allowance.

[0069] In step S12 , the outer contour of the nut 10 needs to be processed by turning or milling to obtain the outer contour of the finished nut 10 .

[0070] Of course, in some embodiments, step S1 may also process the outer contour of the finished nut 10 by die casting or forging.

[0071] In step S2, the nut to be processed is drilled to form a preset through hole 14, the size of which matches the main body of the bolt 20.

[0072] In steps S3 and S4, the size of the glue injection groove is set to be small, and a drilling tool with higher precision and smaller size is required for processing.

[0073] In particular, when the relationship between the hole diameter of the first glue injection groove c1d1 and the screw thread height h1 is configured as d2<0.5h1, it is necessary to use electric spark drilling to perform processing.

[0074] Then, glue is poured into the glue injection groove so as to perform internal thread processing later. In this case, the glue injection groove is filled with glue to provide structural support for the internal thread processing, thereby reducing the metal structure collapse of the body 11 caused by the internal thread processing.

[0075] The order of step S5 is variable. Step S5 can be performed before step S4 or after step S4. There is no limitation here and it can be set as needed.

[0076] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, device, article or method including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, device, article or method. In the absence of further restrictions, an element defined by the sentence "includes a ..." does not exclude the existence of other identical elements in the process, device, article or method including the element.

[0077] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A nut, characterized in that: include: A body, comprising an internal thread segment and a connecting segment connected to the internal thread segment, wherein a through hole penetrating the internal thread segment and the connecting segment is provided in the body; The internal thread section is provided with a glue injection groove communicating with the through hole; The connecting section is radially recessed relative to the through hole to form a first groove for glue pouring.

2. The nut according to claim 1, characterized in that: The glue injection groove includes a first glue injection groove, and at least one of the first glue injection grooves axially penetrates the thread of the internal thread section away from one end of the connecting section.

3. The nut according to claim 2, characterized in that: The relationship between the aperture of the first glue injection groove d1 and the thread height h1 is configured as 0.2h1≤d2≤1.5h1.

4. The nut according to claim 1, characterized in that: The glue injection grooves are arranged in a plurality in an annular manner along the circumferential direction.

5. The nut according to claim 1, characterized in that: The glue injection groove includes a second glue injection groove, and at least one of the second glue injection grooves passes through the internal thread of the internal thread section from the outside to the inside in a radial direction to communicate with the through hole.

6. The nut according to claim 5, characterized in that: A plurality of the second glue injection grooves are provided at intervals along the axial direction, and a plurality of the first grooves are provided at intervals along the axial direction. The axial spacing d3 between adjacent second glue injection grooves and the axial spacing d4 between adjacent first grooves are configured as d4<d3<2d4.

7. The nut according to claim 5, characterized in that: There are multiple second glue injection grooves spaced apart in the axial direction, and there are multiple second glue injection grooves spaced apart in the circumferential direction. The circumferential spacing d2 between two adjacent second glue injection grooves and the axial spacing d3 between two adjacent second glue injection grooves are configured as follows: d3<d2<3d3.

8. The nut according to claim 2, characterized in that: The width b1 of the first groove along the axial direction and the distance d5 between adjacent thread teeth are configured as d5≤b1<3d5.

9. The nut according to claim 1, characterized in that: The connecting section is provided with a second groove at one end away from the internal thread section. The radial dimension of the second groove is larger than the aperture of the through hole. The second groove is used for mounting the insulating cylinder.

10. The nut according to claim 9, characterized in that The insulating tube is made of flexible material, and one end of the insulating tube away from the internal thread section protrudes out of the connecting section by 0.3mm-1mm.

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