Bolt assembly

Abstract

The bolt assembly provided by the application relates to the technical field of anti-loose bolts. The bolt assembly comprises a first bolt, a second bolt and a locking plate. The first bolt is provided with a first thread, and the second bolt is provided with a second thread. The rotation directions of the first thread and the second thread are opposite. The nut of the first bolt is provided with a first clamping groove, the nut of the second bolt is provided with a second clamping groove, and the locking plate is clamped into the first clamping groove and the second clamping groove respectively. The bolt assembly mechanically limits the two bolts by using the locking plate, and can effectively prevent the bolts from loosening.

Description

Technical Field

[0001] This utility model relates to the field of anti-loosening bolt technology, and in particular to a bolt assembly. Background Technology

[0002] A bolt is a common mechanical part, a cylindrical threaded fastener used to connect nuts. A bolt consists of two parts: a head and a threaded shank. When a bolt connects two parts, mechanical vibration or shear force within the shank can easily reduce or weaken the preload, leading to bolt loosening or even connection failure. Utility Model Content

[0003] The purpose of this utility model is to provide a bolt assembly that can mechanically limit the bolt to prevent it from loosening, and can also counteract the shear force between adjacent bolts, thereby preventing loosening under vibration or impact conditions and improving the reliability and safety of the connection.

[0004] In a first aspect, the present invention provides a bolt assembly, including a first bolt, a second bolt, and a locking plate; The first bolt has a first thread, and the second bolt has a second thread, with the first thread and the second thread having opposite directions of rotation; The first bolt has a first groove in its nut, and the second bolt has a second groove in its nut. The locking plate is respectively inserted into the first groove and the second groove.

[0005] In an optional embodiment, when the first bolt and the second bolt are tightened, the first slot and the second slot are positioned opposite each other, with one end of the locking plate engaging the first slot and the other end engaging the second slot.

[0006] In an optional embodiment, the first slot and the second slot are respectively provided on the side of the nut.

[0007] In an optional embodiment, the cross-sections of the nuts of the first bolt and the second bolt are polygonal.

[0008] In an optional embodiment, the nuts of the first bolt and the second bolt have pentagonal cross sections.

[0009] In an optional embodiment, the locking plate has a rectangular cross-section.

[0010] In an optional implementation, the first bolt and the second bolt are of equal length.

[0011] In an optional embodiment, the surface of the locking plate is provided with friction protrusions, and / or the groove walls of the first slot and the second slot are provided with friction protrusions.

[0012] In an optional embodiment, the locking plate has a handle in the middle.

[0013] In an optional embodiment, the locking plate is made of alloy steel or resilient stainless steel.

[0014] The bolt assembly provided by this utility model features two bolts, a first bolt and a second bolt, with opposite thread directions. A locking plate mechanically limits the movement of the first and second bolts, effectively preventing loosening and improving connection reliability. Furthermore, the locking plates are inserted into the two slots of the first and second bolts respectively, which can counteract the shear force between adjacent bolts, thereby preventing loosening under vibration or impact conditions and enhancing the reliability and safety of the connection. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 A structural schematic diagram of the assembly state of the bolt assembly provided in an embodiment of this utility model; Figure 2 A structural schematic diagram of the disassembled state of the bolt assembly provided in an embodiment of this utility model; Figure 3 A schematic diagram of a locking plate for a bolt assembly provided in an embodiment of this utility model; Figure 4 This is another structural schematic diagram of the locking plate of the bolt assembly provided in an embodiment of the present utility model.

[0017] Icons: 100 - Bolt assembly; 110 - First bolt; 111 - First thread; 112 - First slot; 120 - Second bolt; 121 - Second thread; 122 - Second slot; 113 - Nut; 130 - Locking plate; 131 - Friction protrusion; 132 - Handle. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0019] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0020] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0021] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply 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 tilted.

[0023] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0024] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] Bolts, as one of the most common mechanical fasteners, are widely used in various mechanical structures, equipment assemblies, and building connections. A typical bolt usually consists of a shank and a nut (head), which are tightened together to create a preload and achieve a secure connection. However, during equipment operation, external vibrations, alternating loads, or shear forces can cause the bolt's preload to gradually decrease, eventually leading to the nut loosening and falling off. In severe cases, this can cause mechanical connection failure or safety accidents.

[0026] Existing bolt anti-loosening technologies mainly include mechanical anti-loosening methods, friction anti-loosening methods, and structural anti-loosening methods. Mechanical anti-loosening methods include adding spring washers, self-locking nuts, and locking washers. Friction anti-loosening methods include using nylon lock nuts and adhesive-coated threads. Structural anti-loosening methods include double-nut locking structures. However, these solutions still have the following shortcomings: spring washers are prone to failure after long-term vibration; adhesive-coated threads are complex to assemble and cannot be reused; double-nut locking increases assembly space and weight; and self-locking structures have unstable anti-loosening effects in high-temperature or frequently disassembled environments.

[0027] To overcome at least one of the defects in the prior art, this embodiment proposes a bolt assembly that is simple in structure, easy to install, and can effectively counteract shear force, prevent loosening, and improve the safety and reliability of the connection.

[0028] Please combine Figure 1 and Figure 2 This utility model provides a bolt assembly 100, including a first bolt 110, a second bolt 120, and a locking plate 130. The first bolt 110 has a first thread 111, and the second bolt 120 has a second thread 121, with opposite directions of rotation. One is a clockwise thread, and the other is a counterclockwise thread. The nut 113 of the first bolt 110 has a first groove 112, and the nut 113 of the second bolt 120 has a second groove 122. The locking plate 130 is engaged with the first groove 112 and the second groove 122, respectively. This bolt assembly 100 uses the locking plate 130 to mechanically limit the two bolts, effectively preventing bolt loosening. Since the two threads of the first bolt 110 and the second bolt 120 have opposite directions of rotation, the locking plate 130 can counteract the shear force between adjacent bolts, thereby preventing loosening under vibration or impact conditions and improving the reliability and safety of the connection.

[0029] With the first bolt 110 and the second bolt 120 tightened, the first slot 112 and the second slot 122 are positioned opposite each other, with one end of the locking plate 130 engaging the first slot 112 and the other end engaging the second slot 122. Optionally, the first bolt 110 and the second bolt 120 are of equal length to ensure that the locking plate 130 can be horizontally fitted after installation. This reduces the stress on the locking plate 130, extends its service life, and makes the structure more reliable.

[0030] Optionally, the number of turns and pitch of the first thread 111 and the second thread 121 are equal.

[0031] Optionally, the first slot 112 and the second slot 122 are respectively provided on the side of the nut 113. The depth of the first slot 112 and the second slot 122, and the spacing between the first bolt 110 and the second bolt 120 are adapted to the length of the locking plate 130. This arrangement ensures that the locking plate 130 can be reliably embedded in the first slot 112 and the second slot 122, preventing the locking plate 130 from coming out of the first slot 112 or the second slot 122, thus improving the connection reliability.

[0032] Optionally, the nuts 113 of the first bolt 110 and the second bolt 120 may have polygonal cross-sections to facilitate tightening. In this embodiment, the nuts 113 of the first bolt 110 and the second bolt 120 have the same cross-section, which is pentagonal, to facilitate tightening and create a uniform force-bearing surface. Of course, in other embodiments, the cross-sections of the nuts 113 of the first bolt 110 and the second bolt 120 may be other shapes, such as quadrilaterals, hexagons, or octagons, etc., which are not specifically limited here.

[0033] Optionally, the locking plate 130 has a rectangular cross-section. The thickness of the locking plate 130 is equal to the width of the first slot 112 or the second slot 122 in the axial direction of the bolt. This effectively locks the locking plate 130 onto the first bolt 110 and the second bolt 120, preventing the bolts from loosening.

[0034] Please combine Figure 3Optionally, the surface of the locking plate 130 is provided with friction protrusions 131, and / or the groove walls of the first groove 112 and the second groove 122 are provided with friction protrusions 131. The friction protrusions 131 can further increase the friction between the locking plate 130 and the groove walls, preventing the locking plate 130 from sliding out of the grooves and improving the reliability of the connection. It should be understood that the friction protrusions 131 may be provided only on the surface of the locking plate 130, including but not limited to the upper surface, lower surface, and side surface of the locking plate 130. The friction protrusions 131 may be provided only on the groove wall surface of the first groove 112 or the second groove 122, or friction protrusions 131 may be provided on the surface of the locking plate 130 and the groove wall surfaces of the first groove 112 and the second groove 122 respectively. No specific limitations are made here.

[0035] Please combine Figure 4 Optionally, a handle 132 is provided in the middle of the locking plate 130 to facilitate picking up the locking plate 130 and make operation more convenient.

[0036] Optionally, the locking plate 130 can be made of alloy steel or flexible stainless steel to ensure shear strength, reliable structure, durability, and to extend service life and prevent connection failure.

[0037] The bolt assembly 100 provided in this embodiment operates on the following principle: During assembly, the first bolt 110 and the second bolt 120 are first screwed into their respective mounting holes. Since the first thread 111 and the second thread 121 have opposite directions of rotation, when tightened, the slots on the side of their nuts 113 will form a relative fit. Then, the two ends of the locking plate 130 are respectively inserted into the first slot 112 and the second slot 122, thus completing the mechanical locking.

[0038] In this way, after the first bolt 110 and the second bolt 120 are tightened with their threaded holes or nuts respectively, the locking plate 130 is embedded in the slots of the two nuts 113, forming a mechanical limit. Since the two adjacent bolts have opposite directions of rotation, under mechanical vibration, impact, or alternating loads, such as external shear force, the rotational tendencies of the two nuts 113 cancel each other out, and the locking plate 130 plays a further mechanical limiting role, thereby preventing the bolts from loosening. At the same time, the locking plate 130 can withstand the shear force from between the nuts 113, forming a double anti-loosening effect, improving the reliability and safety of the bolt connection. This structure not only has a significant anti-loosening effect, but is also simple to assemble and suitable for mass mechanized production.

[0039] It should be noted that the bolt assembly 100 provided in this embodiment is not limited to two bolts, but can also be three or more bolts, as long as the threads of two adjacent bolts are opposite and the locking plate 130 is inserted into the two bolts with opposite threads.

[0040] In summary, the bolt assembly 100 provided in this embodiment of the present invention has the following beneficial effects, including: The bolt assembly 100, through its reverse thread connection with the locking plate 130, achieves effective loosening, enhancing the reliability and safety of the connection. The locking plate 130 effectively counteracts the shear force of adjacent bolts, preventing preload reduction or loss and effectively preventing loosening. The bolt assembly 100 has a simple structure and is easy to manufacture; it only requires a slot to be made in the nut 113 for use with the locking plate 130. All structural parts are metal, eliminating the need for adhesive or plastic locking mechanisms, facilitating multiple assembly and reuse. Furthermore, it has a wide range of applications, suitable for high-vibration environments such as robotic arms, railways, aviation, and automotive chassis, demonstrating strong practicality.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features. Any modifications, equivalent substitutions, improvements, etc., should be included within the protection scope of this utility model.

Claims

1. A bolt assembly, characterized in that, Includes the first bolt, the second bolt, and the locking plate; The first bolt has a first thread, and the second bolt has a second thread, with the first thread and the second thread having opposite directions of rotation; The first bolt has a first groove in its nut, and the second bolt has a second groove in its nut. The locking plate is respectively inserted into the first groove and the second groove.

2. The bolt assembly according to claim 1, characterized in that, When the first bolt and the second bolt are tightened, the first slot and the second slot are positioned opposite each other, with one end of the locking plate engaging the first slot and the other end engaging the second slot.

3. The bolt assembly according to claim 1, characterized in that, The first slot and the second slot are respectively located on the side of the nut.

4. The bolt assembly according to claim 1, characterized in that, The nuts of the first bolt and the second bolt have polygonal cross-sections.

5. The bolt assembly according to claim 1, characterized in that, The nuts of the first bolt and the second bolt have pentagonal cross-sections.

6. The bolt assembly according to claim 1, characterized in that, The locking plate has a rectangular cross-section.

7. The bolt assembly according to claim 1, characterized in that, The first bolt and the second bolt are of equal length.

8. The bolt assembly according to claim 1, characterized in that, The surface of the locking plate is provided with friction protrusions, and / or the groove walls of the first slot and the second slot are provided with friction protrusions.

9. The bolt assembly according to claim 1, characterized in that, The locking plate has a handle in the middle.

10. The bolt assembly according to any one of claims 1 to 9, characterized in that, The locking plate is made of alloy steel or elastic stainless steel.

Images