Lightweight fastener

Abstract

The utility model relates to the technical field of mechanical fasteners, in particular to a light-weight fastener which is provided with a threaded through hole and a plurality of weight reduction grooves, the weight reduction grooves are sequentially arranged around the threaded through hole, at least two weight reduction grooves are oppositely arranged, the bottom wall faces of the weight reduction grooves are of a plane structure, and the bottom wall faces of the weight reduction grooves are of a plane structure. And the locking part of the pressure equipment can extend into the weight reduction groove, is matched with the bottom wall surface of the weight reduction groove and applies pressure, so that the threaded through hole deforms, and the self-locking function is achieved. According to the light-weight fastener, the multiple weight reducing grooves are designed, so that the effects of reducing weight and facilitating light-weight design are achieved, in addition, a locking part, namely a locking block, of pressure equipment can be used for stretching into the weight reducing grooves, pressure is applied to the planes of the weight reducing grooves, an inner hole of the nut is deformed, and therefore when the nut is assembled with a bolt in the later period, the nut is not prone to deformation; the light-weight fastener can generate locking torque and has an anti-loosening function, that is, the light-weight fastener can be suitable for all-metal self-locking nuts, and the application range is wider.

Description

Technical Field

[0001] The present application relates to the technical field of mechanical fasteners, and in particular to a lightweight fastener. Background Art

[0002] A nut is a fastener that is usually used with a bolt or a screw. Its main purpose is to generate an axial clamping force when the nut or bolt is tightened with a wrench, so that the connected parts do not slip or separate under the action of the load. Among them, self-locking nuts are widely used in the connection of mechanical equipment and automobile fields, and are used in large quantities. They mainly use external force to force the threaded hole of the self-locking nut to deform. When it is assembled with the bolt, it will generate a locking torque and have an anti-loosening function. Therefore, it is currently necessary to develop a lightweight fastener suitable for all-metal self-locking nuts. Utility Model Content

[0003] The purpose of the present application is to provide a lightweight fastener, which to a certain extent solves the technical problem in the prior art of needing to develop a lightweight fastener suitable for all-metal self-locking nuts.

[0004] The present application provides a lightweight fastener, which is formed with a threaded through hole, and the outer wall of the lightweight fastener is formed with a plurality of weight-reducing grooves, and the plurality of weight-reducing grooves are arranged in sequence around the threaded through hole, wherein at least two of the weight-reducing grooves are arranged opposite to each other, and the bottom wall surfaces thereof are all planar structures, so that the locking part of the pressure equipment can extend into the weight-reducing groove, cooperate with the bottom wall surface of the weight-reducing groove and apply pressure, so that the threaded through hole is deformed to have a self-locking function.

[0005] In the above technical solution, further, the width of the bottom wall of the weight-reducing groove is L=0.1d-0.3d, wherein d is the nominal diameter of the thread of the threaded through hole.

[0006] In any of the above technical solutions, further, the depth of the weight-reducing groove is H=0.1d-0.2d, wherein d is the nominal diameter of the thread of the threaded through hole.

[0007] In any of the above technical solutions, further, along the axial direction of the threaded through hole, the bottom wall surface of the weight-reducing groove is gradually inclined toward the axial direction of the threaded through hole.

[0008] In any of the above technical solutions, further, an angle β between the bottom wall surface of the weight-reducing groove and the axis of the threaded through hole is 2°-4°.

[0009] In any of the above technical solutions, further, the lightweight fastener includes a bottom plate portion and a fastening portion connected to each other; wherein the fastening portion is arranged on the upper surface of the bottom plate portion, and the bottom plate portion and the fastening portion are both formed with the threaded through hole; and the weight-reducing groove is formed on the side of the fastening portion.

[0010] In any of the above technical solutions, further, before the weight-reducing groove is machined on the fastening portion, the cross-section of the fastening portion along the axial direction of its threaded through hole is a regular hexagon, and each side of the fastening portion is machined with one weight-reducing groove.

[0011] In any of the above technical solutions, further, the bottom plate portion and the fastening portion are an integrated structure.

[0012] In any of the above technical solutions, further, along the axial direction of the threaded through hole, both ends of the threaded through hole are formed with chamfered corners.

[0013] In any of the above technical solutions, further, the threaded through hole is formed at the center of the lightweight fastener.

[0014] In any of the above technical solutions, further, a plurality of the weight-reducing grooves are sequentially spaced around the threaded through hole.

[0015] In any of the above technical solutions, further, along the axial direction of the threaded through hole, the weight-reducing groove at least passes through one end portion of the lightweight fastener.

[0016] In any of the above technical solutions, further, the threaded through hole is a circular hole in an initial state, and after being deformed by the pressure device, the threaded through hole changes from a circular hole to an elliptical hole.

[0017] Compared with the prior art, the beneficial effects of this application are:

[0018] The lightweight fastener provided in the present application reduces weight by designing multiple weight-reducing grooves, which contributes to the lightweight design. In addition, the locking portion of the pressure equipment, that is, the locking block, can be used to extend into the weight-reducing groove, and pressure can be applied on the plane of the weight-reducing groove to deform the inner hole of the nut, so that a locking torque is generated when it is later assembled with the bolt, and it has an anti-loosening function. In other words, this lightweight fastener can be suitable for all-metal self-locking nuts, and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the present application or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 A schematic diagram of the structure of a lightweight fastener provided in an embodiment of the present application;

[0021] Figure 2 Another schematic diagram of the structure of the lightweight fastener provided in the embodiment of the present application;

[0022] Figure 3 Another structural schematic diagram of the lightweight fastener provided in the embodiment of the present application;

[0023] Figure 4 A partial cross-sectional view of a lightweight fastener provided in an embodiment of the present application.

[0024] Reference numerals:

[0025] 1-lightweight fastener, 11-bottom plate portion, 12-fastening portion, 121-threaded through hole, 122-weight reduction groove, 1221-bottom wall surface, 2-locking portion. DETAILED DESCRIPTION

[0026] The technical solution of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0027] The components of the embodiments of the present application generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed, but merely represents the selected embodiments of the present application.

[0028] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0029] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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 therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0030] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] Refer to the following Figures 1 to 4 A lightweight fastener according to some embodiments of the present application is described.

[0032] See also Figures 1 to 3 As shown, an embodiment of the present application provides a lightweight fastener 1, the lightweight fastener 1 is formed with a threaded through hole 121, and the outer wall of the lightweight fastener 1 is formed with a plurality of weight-reducing grooves 122, and the plurality of weight-reducing grooves 122 are sequentially arranged around the threaded through hole 121, wherein at least two weight-reducing grooves 122 are arranged opposite to each other, and their bottom wall surfaces 1221 are all planar structures (the bottom wall surface 1221 of the weight-reducing groove 122 specifically refers to the surface of the weight-reducing groove 122 arranged close to the axis of the threaded through hole 121 as the bottom surface), so that the locking portion 2 of the pressure equipment can extend into the weight-reducing groove 122. , and cooperate with the bottom wall surface 1221 of the weight-reducing groove 122 and apply pressure, so that the threaded through hole 121 is deformed to have a self-locking function. That is to say, the two relative locking parts 2 of the pressure equipment, that is, the locking blocks, respectively extend into the two relatively arranged weight-reducing grooves 122 one by one, and apply pressure at the same time, so that the threaded through hole 121 is quickly deformed, and preferably, the threaded through hole 121 is initially a circular hole. After the pressure equipment applies force, it can be changed from a circular hole to an elliptical hole. Of course, it is not limited to the above shape, and can also be designed according to actual needs.

[0033] Based on the structure described above, it can be known that the lightweight fastener 1 provided in the present application reduces weight by designing multiple weight-reducing grooves 122, which contributes to the effect of lightweight design. In addition, the locking part 2 of the pressure equipment, that is, the locking block, can be used to extend into the weight-reducing groove 122, and pressure is applied on the plane of the weight-reducing groove 122 to deform the inner hole of the nut, so that a locking torque is generated when it is assembled with the bolt later, and it has an anti-loosening function. In other words, this lightweight fastener 1 can be suitable for all-metal self-locking nuts, and has a wider range of applications.

[0034] In this embodiment, preferably, Figure 2 As shown, the width L of the bottom wall 1221 of the weight reducing groove 122 is 0.1d-0.3d, wherein d is the nominal diameter of the thread of the threaded through hole 121. It should be noted that the length direction of the bottom wall 1221 of the weight reducing groove 122 is parallel to the axial direction of the threaded through hole 121, and the width direction of the bottom wall 1221 of the weight reducing groove 122 is perpendicular to the axial direction of the threaded through hole 121.

[0035] According to the structure described above, as the nominal diameter of the thread of the threaded through hole 121 changes, the width of the bottom wall surface 1221 of the weight reduction groove 122 can be redesigned accordingly to ensure that there is enough force application surface, thereby causing the threaded through hole 121 to deform.

[0036] In this embodiment, preferably, Figure 2 As shown, the depth H of the weight reducing groove 122 is 0.1d-0.2d, wherein d is the nominal diameter of the thread of the threaded through hole 121. It should be noted that the depth of the weight reducing groove 122 specifically refers to the distance between the bottom wall surface 1221 of the weight reducing groove 122 and the opening end opposite to the bottom wall surface 1221.

[0037] According to the structure described above, it can be known that as the nominal diameter of the thread of the threaded through hole 121 changes, the depth of the weight-reducing groove 122 can be redesigned accordingly, thereby ensuring that the locking portion 2 of the pressure equipment can stably cooperate with the weight-reducing groove 122. At the same time, after force is applied, the threaded through hole 121 can be deformed to a certain extent, but not too much deformation or damage.

[0038] In this embodiment, preferably, Figure 4 As shown, along the axial direction of the threaded through hole 121 , that is, along the direction from the bottom plate portion 11 toward the fastening portion 12 described below, the bottom wall surface 1221 of the weight reduction groove 122 gradually approaches the axial direction of the threaded through hole 121 and is inclined.

[0039] Further, preferably, Figure 4 As shown, the angle β between the bottom wall surface 1221 of the weight-reducing groove 122 and the axis of the threaded through hole 121 is 2°-4°.

[0040] According to the structure described above, the β angle is designed within the above range, which is more conducive to saving metal and meets the needs of lightweight. In addition, it makes the shape of the wrench and the weight-reducing groove 122 easier to match, which is conducive to the fit of the assembly wrench when tightening the nut, thereby improving the tightening efficiency.

[0041] It should be noted that the value range of the angle β between the bottom wall surface 1221 of the weight reduction groove 122 and the axis of the threaded through hole 121 is not limited to the above, and can also be selected according to actual needs. For example, β can also be selected within the range of less than 2° or greater than 4°, depending on the actual needs.

[0042] In this embodiment, preferably, Figure 1 As shown, the lightweight fastener 1 includes a bottom plate portion 11 and a fastening portion 12 connected to each other; wherein the fastening portion 12 is arranged on the upper surface of the bottom plate portion 11, and both the bottom plate portion 11 and the fastening portion 12 are formed with threaded through holes 121; a weight reduction groove 122 is formed on the side of the fastening portion 12.

[0043] According to the structure described above, the bottom plate portion 11 can increase the contact area with the structure to be locked, thereby increasing the stability and reliability of the connection; the fastening portion 12 mainly plays a role in locking with the bolt.

[0044] It should be noted that the structure of the lightweight fastener 1 is not limited to the above-mentioned structure including the bottom plate portion 11 and the fastening portion 12, and other structures may also be adopted. For example, the lightweight fastener 1 only includes the above-mentioned fastening portion 12 without the bottom plate portion 11, and the specific design is based on actual needs.

[0045] In this embodiment, preferably, Figure 1 and Figure 2 As shown, before the weight-reducing groove 122 is machined on the fastening portion 12, the cross-section of the fastening portion 12 along the axial direction of its threaded through hole 121 is a regular hexagon, and each side of the fastening portion 12 is machined with a weight-reducing groove 122, that is, the initial material is a regular hexagonal deformed block, and then a weight-reducing groove 122 is machined on each of the six sides.

[0046] According to the structure described above, a weight-reducing groove 122 is provided on each of the six sides of the regular hexagonal deformation block, which helps to achieve uniform weight reduction in various parts, ensure overall stability, and avoid the problem of uneven distribution of weight-reducing areas. Moreover, two adjacent weight-reducing grooves 122 are arranged at discontinuous intervals, so that a protrusion is formed between two adjacent weight-reducing grooves 122. In other words, a certain wall thickness is provided between the two weight-reducing grooves 122 to ensure strength. Of course, the invention is not limited to this, and multiple weight-reducing grooves 122 may also be arranged in sequence and continuously, depending on the actual needs.

[0047] In addition, three pairs of relatively arranged weight-reducing grooves 122 are formed among the six weight-reducing grooves 122, so that any pair can be selected to cooperate with the two fastening parts 12 of the pressure equipment, and then force is applied to the opposite sides of the threaded through hole 121, so as to facilitate uniform deformation of the threaded through hole 121, and preferably, it can be changed from a circle to an ellipse. Of course, it is not limited to this. In addition, it should be noted that: for the fastening part 12 with a regular six-deformation block structure, it is not limited to setting a weight-reducing groove 122 on each side.

[0048] Furthermore, preferably, along the height direction of the fastening part 12, the weight-reducing groove 122 runs through the top and bottom of the fastening part 12, so as to facilitate processing and manufacturing and avoid interference with other structures of the pressure equipment, wherein the height direction of the fastening part 12, the axial direction of the threaded through hole 121 and the height direction of the lightweight fastener 1 are consistent.

[0049] Further, preferably, along the height direction of the fastening portion 12 , the projection of the weight-reducing groove 122 provided on each edge is located in the middle area of ​​the edge.

[0050] It should be noted that the structure of the fastening portion 12 before the weight-reducing groove 122 is not limited to the above-mentioned regular hexagonal deformed block, and the shape of the block can also be designed according to actual needs. For example, the fastening portion 12 can be a polygonal block with less than six sides, such as a pentagon or a quadrilateral, or the fastening portion 12 can be a polygonal block with more than six sides, such as a heptagon or an octagon, or the fastening portion 12 can be a circular block, etc., and the specific design is based on actual needs.

[0051] In addition, it is not limited to opening a weight-reducing groove 122 on each side of the fastening portion 12, but weight-reducing grooves 122 may be opened only on two sides, three sides, four sides, five sides, six sides or seven sides, etc., depending on actual needs.

[0052] In this embodiment, preferably, Figure 1 and Figure 2 As shown, the bottom plate 11 is a circular plate to avoid sharp corners, thereby effectively avoiding interference with other structures during use. Of course, it is not limited to this, and can also be a square plate or a polygonal plate, etc., which is designed according to actual needs.

[0053] In this embodiment, preferably, Figure 1 As shown, the bottom plate portion 11 and the fastening portion 12 are an integrated structure, which has high overall strength and is not easily damaged. It also saves assembly steps and improves production efficiency. Of course, the present invention is not limited to this.

[0054] In this embodiment, preferably, Figure 1As shown, along the axial direction of the threaded through hole 121 , both ends of the threaded through hole 121 are formed with chamfered corners.

[0055] According to the structure described above, both ends of the threaded through hole 121 are rounded to avoid sharp corners or burrs that affect the subsequent assembly with the bolt.

[0056] In this embodiment, preferably, Figure 1 and Figure 2 As shown, the threaded through hole 121 is formed at the center of the lightweight fastener 1, that is, the threaded through hole 121 is formed at the center of the aforementioned fastening portion 12, so that the nut and the bolt are more coordinated and stable during assembly, ensuring assembly accuracy and also facilitating early processing and manufacturing.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A lightweight fastener, characterized in that: The lightweight fastener is formed with a threaded through hole, and the outer wall of the lightweight fastener is formed with a plurality of weight-reducing grooves, and the plurality of weight-reducing grooves are arranged in sequence around the threaded through hole, wherein at least two of the weight-reducing grooves are arranged opposite to each other, and the bottom wall surfaces thereof are both planar structures, so that the locking part of the pressure equipment can extend into the weight-reducing groove, cooperate with the bottom wall surface of the weight-reducing groove and apply pressure, so that the threaded through hole is deformed to have a self-locking function.

2. The lightweight fastener according to claim 1, characterized in that: The width L of the bottom wall of the weight-reducing groove is 0.1d-0.3d, wherein d is the nominal diameter of the thread of the threaded through hole.

3. The lightweight fastener according to claim 1, characterized in that: The depth of the weight-reducing groove is H=0.1d-0.2d, wherein d is the nominal diameter of the thread of the threaded through hole.

4. The lightweight fastener according to claim 1, characterized in that: Along the axial direction of the threaded through hole, the bottom wall surface of the weight-reducing groove is gradually inclined toward the axial direction of the threaded through hole.

5. The lightweight fastener according to claim 4, characterized in that: The angle β between the bottom wall surface of the weight-reducing groove and the axis of the threaded through hole is 2°-4°.

6. The lightweight fastener according to claim 1, characterized in that: The lightweight fastener includes a bottom plate portion and a fastening portion connected to each other; wherein the fastening portion is arranged on the upper surface of the bottom plate portion, and the bottom plate portion and the fastening portion are both formed with the threaded through hole; the weight reduction groove is formed on the side of the fastening portion.

7. The lightweight fastener according to claim 6, characterized in that: Before the weight-reducing groove is machined on the fastening portion, the cross section of the fastening portion along the axial direction of the threaded through hole thereof is a regular hexagon, and one weight-reducing groove is machined on each side of the fastening portion.

8. The lightweight fastener according to claim 6, characterized in that: The bottom plate portion and the fastening portion are an integrated structure.

9. The lightweight fastener according to claim 1, characterized in that: Along the axial direction of the threaded through hole, both ends of the threaded through hole are formed with chamfered corners.

10. The lightweight fastener according to any one of claims 1 to 9, characterized in that: The threaded through hole is formed at the center of the lightweight fastener; and / or A plurality of the weight-reducing grooves are sequentially arranged around the threaded through hole; and / or Along the axial direction of the threaded through hole, the weight-reducing groove at least passes through one end of the lightweight fastener; and / or The threaded through hole is a circular hole in an initial state, and after being deformed by the pressure device, the threaded through hole changes from a circular hole to an elliptical hole.

Images