Anti-loose fastening assembly and vehicle

Abstract

The utility model provides a kind of anti-loose fastening assembly and vehicle.The anti-loose fastening assembly includes first bolt, second bolt and nut, nut is equipped with the first internal thread and the second internal thread of opposite rotation, first bolt is equipped with the first external thread of adaptation with first internal thread, second bolt is equipped with the second external thread of adaptation with second internal thread, first bolt is equipped with the passage for the second bolt, the first protruding portion of first bolt and the second protruding portion of second bolt are used to mutually stop to prevent first bolt and second bolt from loosening.The anti-loose fastening assembly of the utility model, second bolt can be arranged on first bolt and be connected with nut with the first internal thread of opposite rotation with first bolt, to make first bolt and second bolt self-locking, the first protruding portion of first bolt and the second protruding portion of second bolt can mutually stop to prevent first bolt and second bolt from loosening, make first bolt and second bolt further self-locking, to ensure that first bolt and second bolt cannot be loose.

Description

Technical Field

[0001] This utility model relates to the field of fasteners, specifically to an anti-loosening fastening component and a vehicle. Background Technology

[0002] In vehicles such as passenger cars, the front and rear subframes are fastened to the body using bolts and nuts welded to the body. However, after a period of operation, these bolts can loosen, causing abnormal noises and even leading to misalignment of the suspension and wheels connected to the subframe, creating safety hazards. Anti-loosening fastening components in related technologies connect the bolts to two nuts with opposite thread directions, creating a self-locking effect to prevent loosening. However, these anti-loosening fastening components cannot completely prevent loosening, and because it is difficult to weld both nuts to the vehicle body, they are unsuitable for connecting the frame and body. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model provide an anti-loosening fastening component and a vehicle using the anti-loosening fastening component.

[0005] The anti-loosening fastening component of this utility model embodiment includes:

[0006] A first bolt, a second bolt, and a nut, wherein the nut has a first internal thread and a second internal thread, the first internal thread and the second internal thread having opposite thread directions; the first bolt has a first external thread adapted to the first internal thread; the second bolt has a second external thread adapted to the second internal thread; the first bolt has an axially penetrating channel for the thread of the second bolt to pass through; the head of the first bolt has a first protrusion; the head of the second bolt has a second protrusion; the first protrusion and the second protrusion are used to mutually abut against each other to prevent the first bolt and the second bolt from loosening.

[0007] In this embodiment of the anti-loosening fastening assembly, the second bolt can be inserted through the first bolt and connected to the nut in the opposite direction of the first bolt, so that the first bolt and the second bolt are self-locking. The first protrusion of the first bolt and the second protrusion of the second bolt can abut against each other to prevent the first bolt and the second bolt from loosening, so that the first bolt and the second bolt are further self-locking, thereby ensuring that the first bolt and the second bolt will not loosen, and the anti-loosening fastening assembly has stronger connection strength and stability.

[0008] In some embodiments, the first protrusion has a first inclined surface for sliding relative to the abutting second protrusion when the second bolt is tightened; and / or

[0009] The second protrusion has a second inclined surface, which is used to slide relative to the first protrusion when the second bolt is tightened.

[0010] In some embodiments, the angle between one end face of the first protrusion along the circumference of the first bolt and the cross-section of the first bolt is 5° to 45° to form the first inclined surface, and the angle between the other end face of the first protrusion along the circumference of the first bolt and the cross-section of the first bolt is 75° to 115° to form a first abutting surface for abutting the second protrusion.

[0011] The angle between one end face of the second protrusion along the circumference of the second bolt and the cross-section of the second bolt is 5° to 45° to form the second inclined surface, and the angle between the other end face of the second protrusion along the circumference of the second bolt and the cross-section of the second bolt is 75° to 115° to form the second abutment surface that abuts against the first protrusion.

[0012] In some embodiments, the first inclined surface extends axially along the first bolt and is inclined along the circumferential or tangential direction of the first bolt.

[0013] The second inclined surface extends along the axial direction of the second bolt and is inclined along the circumferential or tangential direction of the second bolt.

[0014] In some embodiments, there are multiple first protrusions, and the multiple first protrusions are arranged sequentially along the circumference of the first bolt.

[0015] There are multiple second protrusions, and the multiple second protrusions are arranged sequentially along the circumference of the second bolt;

[0016] The first protrusion is used to engage with the adjacent second protrusion, and the second protrusion is used to engage with the adjacent first protrusion.

[0017] In some embodiments, the head of the second bolt includes a second body and a second flange, and the second flange of the second bolt is provided with a plurality of second protrusions.

[0018] In some embodiments, both the first protrusion and the second protrusion are ratchet teeth.

[0019] In some embodiments, the thread of the second bolt is provided with an annular groove extending circumferentially.

[0020] In some embodiments, the first protrusion may extend and retract from the head of the first bolt; and / or

[0021] The second protrusion can extend and retract from the head of the second bolt.

[0022] The vehicle in this embodiment of the utility model includes:

[0023] The vehicle includes a subframe, a body, and an anti-loosening fastening assembly, wherein the anti-loosening fastening assembly is the anti-loosening fastening assembly described in any of the above embodiments, the nut is welded to the vehicle body, the first bolt passes through the subframe and the body and is connected to the nut, and the second bolt passes through the channel of the first bolt and is connected to the nut.

[0024] In this embodiment of the vehicle, the subframe and the vehicle body are securely connected by the anti-loosening fastening assembly of this embodiment of the vehicle, and the connection is ensured to remain secure. Attached Figure Description

[0025] Figure 1 This is an installation diagram of the anti-loosening fastening component according to an embodiment of the present utility model;

[0026] Figure 2 This is a cross-sectional view of the first bolt of the anti-loosening fastening assembly according to an embodiment of the present utility model;

[0027] Figure 3 This is a schematic diagram of the first bolt of the anti-loosening fastening assembly according to an embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the second bolt of the anti-loosening fastening assembly according to an embodiment of the present utility model;

[0029] Figure 5 This is a cross-sectional view of the nut of the anti-loosening fastening component according to an embodiment of the present invention.

[0030] Figure label:

[0031] 1. First bolt; 11. First external thread; 12. Channel; 13. First protrusion; 14. First inclined surface; 15. First stop surface; 16. First body; 17. First flange; 2. Second bolt; 21. Second external thread; 22. Second protrusion; 23. Second inclined surface; 24. Second stop surface; 25. Second body; 26. Second flange; 27. Annular groove; 3. Nut; 31. First internal thread; 32. Second internal thread; 4. Subframe; 5. Body. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] The following is for reference.Figures 1-5 This invention describes an anti-loosening fastening assembly and a vehicle according to embodiments of the present invention.

[0034] like Figures 1-5 As shown, the anti-loosening fastening assembly of this utility model embodiment includes a first bolt 1, a second bolt 2, and a nut 3.

[0035] Nut 3 has a first internal thread 31 and a second internal thread 32, the threads of the first internal thread 31 and the second internal thread 32 having opposite directions of rotation. For example... Figure 1 and Figure 5 As shown, the nut 3 has a first internal thread 31 and a second internal thread 32 arranged sequentially along the axial direction. The first internal thread 31 and the second internal thread 32 have opposite thread directions. The first internal thread 31 is preferably, but not limited to, clockwise, and the second internal thread 32 is preferably, but not limited to, counterclockwise, and the diameter of the first internal thread 31 is larger than the diameter of the second internal thread 32.

[0036] The first bolt 1 has a first external thread 11 that matches the first internal thread 31, and the second bolt 2 has a second external thread 21 that matches the second internal thread 32. For example... Figures 1-5 As shown, the first external thread 11 is preferably, but not limited to, in the forward direction, that is, clockwise. The first bolt 1 is rotated clockwise to screw into the nut 3 to tighten it, and rotated counterclockwise to unscrew the nut 3 to loosen it. The second external thread 21 is preferably, but not limited to, in the reverse direction, that is, counterclockwise. The second bolt 2 is rotated counterclockwise to screw into the nut 3 to tighten it, and rotated clockwise to unscrew the nut 3 to loosen it.

[0037] The first bolt 1 has an axially extending channel 12 for threading the threaded rod of the second bolt 2. Figures 1-3 As shown, since the screw of the second bolt 2 is used to pass through the channel 12, the diameter of the first external thread 11 is larger than the diameter of the second external thread 21. Both the first bolt 1 and the second bolt 2 are inserted into the nut 3 by the end of the nut 3 that has the first internal thread 31.

[0038] The head of the first bolt 1 has a first protrusion 13, and the head of the second bolt 2 has a second protrusion 22. The first protrusion 13 and the second protrusion 22 are used to mutually abut against each other to prevent the first bolt 1 and the second bolt 2 from loosening. Figures 1-5 As shown, after the first bolt 1 and the second bolt 2 are screwed into the nut 3 and installed in place, the heads of the first bolt 1 and the second bolt 2 are preferably, but not limited to, arranged sequentially along their axial directions and abutting against each other, as shown. Figure 1As shown, the head of the second bolt 2 is located below the head of the first bolt 1. The upper end face of the head of the second bolt 2 is provided with a second protrusion 22, and the lower end face of the head of the first bolt 1 is provided with a first protrusion 13. The first protrusion 13 and the second protrusion 22 abut against each other in the horizontal direction to prevent the first bolt 1 from rotating counterclockwise and to prevent the second bolt 2 from rotating clockwise. Thus, the first protrusion 13 and the second protrusion 22 abut against each other to prevent the first bolt 1 and the second bolt 2 from loosening.

[0039] In this embodiment of the anti-loosening fastening assembly, the second bolt 2 can be inserted through the first bolt 1 and connected to the nut 3 in the opposite direction to the first bolt 1, so that the first bolt 1 and the second bolt 2 are self-locking. The first protrusion 13 of the first bolt 1 and the second protrusion 22 of the second bolt 2 can abut against each other to prevent the first bolt 1 and the second bolt 2 from loosening, so that the first bolt 1 and the second bolt 2 are further self-locking, thereby ensuring that the first bolt 1 and the second bolt 2 will not loosen, and the anti-loosening fastening assembly has stronger connection strength and stability.

[0040] In some embodiments, the first protrusion 13 has a first inclined surface 14 for sliding relative to the abutting second protrusion 22 when the second bolt 2 is tightened. And / or the second protrusion 22 has a second inclined surface 23 for sliding relative to the abutting first protrusion 13 when the second bolt 2 is tightened.

[0041] like Figure 3 and Figure 4 As shown, the first protrusion 13 has a first inclined surface 14, and the second protrusion 22 has a second inclined surface 23. When using the anti-loosening fastening assembly, preferably, but not limited to, first rotating the first bolt 1 clockwise and screwing it into the nut 3, then inserting the thread of the second bolt 2 into the channel 12 and rotating the second bolt 2 counterclockwise to screw it into the nut 3. During the rotation of the second bolt 2, the first inclined surface 14 abuts against and slides relative to the second protrusion 22, and the second inclined surface 23 abuts against and slides relative to the first protrusion 13, thereby ensuring the second bolt 2 is installed in place and preventing interference between the first protrusion 13 and the second protrusion 22, which would otherwise prevent the second bolt 2 from being installed correctly. After the second bolt 2 is installed in place, the first protrusion 13 and the second protrusion 22 abut against each other to prevent the first bolt 1 and the second bolt 2 from loosening.

[0042] It is understood that in other embodiments, the first inclined surface 14 may be provided only in the first protrusion 13, or the second inclined surface 23 may be provided only in the second protrusion 22.

[0043] It is also understandable that the first protrusion 13 is not limited to having the first inclined surface 14, and the second protrusion 22 is not limited to having the second inclined surface 23.

[0044] In other embodiments, the first protrusion 13 may extend and retract from the head of the first bolt 1; and / or the second protrusion 22 may extend and retract from the head of the second bolt 2.

[0045] Specifically, the first protrusion 13 can extend and retract from the lower end face of the head of the first bolt 1, and the second protrusion 22 can extend and retract from the upper end face of the head of the second bolt 2. When using the anti-loosening fastening assembly, it is preferred, but not limited to, first rotating the first bolt 1 clockwise and screwing it into the nut 3, then inserting the thread of the second bolt 2 into the channel 12, and rotating the second bolt 2 counterclockwise to screw it into the nut 3. During the rotation of the second bolt 2, at least one of the first protrusion 13 and the second protrusion 22 is in the retracted position to avoid interference with the other, preventing the second bolt 2 from rotating and being installed in place. After the second bolt 2 is installed in place, both the first protrusion 13 and the second protrusion 22 are in the extended position and abut against each other in the horizontal direction to prevent the first bolt 1 and the second bolt 2 from loosening. Alternatively, the first protrusion 13 can be made retractable, and the second protrusion 22 can be fixedly installed on the head of the second bolt 2, or the second protrusion 22 can be made retractable, and the first protrusion 13 can be fixedly installed on the head of the first bolt 1.

[0046] In some embodiments, the angle between one end face of the first protrusion 13 along the circumference of the first bolt 1 and the cross-section of the first bolt 1 is 5° to 45° to form a first inclined surface 14, and the angle between the other end face of the first protrusion 13 along the circumference of the first bolt 1 and the cross-section of the first bolt 1 is 75° to 115° to form a first abutting surface 15 for abutting the second protrusion 22.

[0047] like Figure 3 As shown, the first protrusion 13 has a first inclined surface 14 and a first stop surface 15 arranged opposite to each other along the circumference of the first bolt 1. The angle between the first inclined surface 14 and the cross-section of the first bolt 1 is 5° to 45°, such as 5°, 10°, 15°, 30°, 45°, etc., so that it abuts against the second protrusion 22 and slides relative to it during the process of the second bolt 2 rotating counterclockwise to screw into the nut 3. The angle between the first stop surface 15 and the cross-section of the first bolt 1 is 75° to 115°, such as 75°, 85°, 90°, 100°, 115°, etc., so that it abuts against the second protrusion 22 after the second bolt 2 is installed in place, thereby making the first bolt 1 and the second bolt 2 self-locking.

[0048] In some embodiments, the angle between one end face of the second protrusion 22 along the circumference of the second bolt 2 and the cross-section of the second bolt 2 is 5° to 45° to form a second inclined surface 23, and the angle between the other end face of the second protrusion 22 along the circumference of the second bolt 2 and the cross-section of the second bolt 2 is 75° to 115° to form a second abutting surface 24 that abuts against the first protrusion 13.

[0049] like Figure 4 As shown, the second protrusion 22 has a second inclined surface 23 and a second stop surface 24 arranged opposite to each other along the circumference of the second bolt 2. The included angle between the second inclined surface 23 and the cross-section of the second bolt 2 is 5° to 45°, for example, 5°, 10°, 15°, 30°, 45°, etc., so that it abuts against the first protrusion 13 and slides relative to it during the process of the second bolt 2 rotating counterclockwise to screw into the nut 3. The included angle between the second stop surface 24 and the cross-section of the second bolt 2 is 75° to 115°, for example, 75°, 85°, 90°, 100°, 115°, etc., so that it abuts against the first protrusion 13 after the second bolt 2 is installed in place, thereby making the first bolt 1 and the second bolt 2 self-locking.

[0050] Preferably, the first protrusion 13 is provided with a first inclined surface 14 and a first abutment surface 15, and the second protrusion 22 is provided with a second inclined surface 23 and a second abutment surface 24. The angle between the first inclined surface 14 and the cross-section of the first bolt 1 and the angle between the second inclined surface 23 and the cross-section of the second bolt 2 are the same. Similarly, the angle between the first abutment surface 15 and the cross-section of the first bolt 1 and the angle between the second abutment surface 24 and the cross-section of the second bolt 2 are the same. After the first bolt 1 and the second bolt 2 are installed in place, the first inclined surface 14 abuts against the second inclined surface 23, and the first abutment surface 15 abuts against the second abutment surface 24.

[0051] In some embodiments, the first inclined surface 14 extends axially along the first bolt 1 and is inclined circumferentially or tangentially along the first bolt 1. This allows it to abut against and slide relative to the second protrusion 22 during the counterclockwise rotation of the second bolt 2 to screw into the nut 3, thereby ensuring the second bolt 2 is properly installed. Figure 3 As shown.

[0052] The second inclined surface 23 extends axially along the second bolt 2 and is inclined circumferentially or tangentially along the second bolt 2. It abuts against and slides relative to the first protrusion 13 during the counterclockwise rotation of the second bolt 2 to screw into the nut 3, thereby ensuring the second bolt 2 is properly installed. Figure 4 As shown.

[0053] In some embodiments, there are multiple first protrusions 13, which are arranged sequentially along the circumference of the first bolt 1. There are multiple second protrusions 22, which are arranged sequentially along the circumference of the second bolt 2. The first protrusions 13 are used to engage with adjacent second protrusions 22, and the second protrusions 22 are used to engage with adjacent first protrusions 13.

[0054] like Figure 1 , Figure 3 and Figure 4 As shown, a plurality of first protrusions 13 are arranged sequentially around the axial direction of the first bolt 1, and the first inclined surfaces 14 of the plurality of first protrusions 13 are in the same direction of inclination in the circumferential direction of the first bolt 1. A plurality of second protrusions 22 are arranged sequentially around the axial direction of the second bolt 2, and the second inclined surfaces 23 of the plurality of second protrusions 22 are in the same direction of inclination in the circumferential direction of the second bolt 3.

[0055] After the first bolt 1 and the second bolt 2 are installed in place, the first protrusion 13 engages between adjacent second protrusions 22. The first inclined surface 14 of the first protrusion 13 abuts against the second inclined surface 23 of one of the second protrusions 22, and the first abutting surface 15 of the first protrusion 13 abuts against the second abutting surface 24 of the other second protrusion 22. The second protrusion 22 engages between adjacent first protrusions 13. The second inclined surface 23 of the second protrusion 22 abuts against the first inclined surface 14 of one of the first protrusions 13, and the second abutting surface 24 of the second protrusion 22 abuts against the first abutting surface 15 of the other first protrusion 13. This ensures a stable connection between the heads of the first bolt 1 and the second bolt 2, thereby ensuring the connection strength of the anti-loosening fastening assembly.

[0056] In some embodiments, the head of the second bolt 2 includes a second body 25 and a second flange 26, and the second flange 26 of the second bolt 2 is provided with a plurality of second protrusions 22.

[0057] like Figure 2 and Figure 3 As shown, the head of the first bolt 1 includes a first body 16 and a first flange 17. The cross-sectional area of ​​the first flange 17 is larger than that of the first body 16. The first flange 17 is located between the first body 16 and the threaded part of the first bolt 1. The first body 16 is preferably, but not limited to, a hexagonal prism. In other words, the first bolt 1 is a flange bolt, which provides higher connection strength and structural strength.

[0058] The first body 16 has a plurality of first protrusions 13 on the end face away from the first flange 17, and the plurality of first protrusions 13 surround the outer periphery of the opening formed by the channel 12.

[0059] The head of the second bolt 2 includes a second body 25 and a second flange 26. The cross-sectional area of ​​the second flange 26 is larger than that of the second body 25. The second flange 26 is located between the second body 25 and the thread of the second bolt 2. The second body 25 is preferably, but not limited to, a hexagonal prism. In other words, the second bolt 2 is a flange bolt, which provides higher connection strength and structural strength.

[0060] The second flange 26 has a plurality of second protrusions 22 on the end face opposite to the second body 25, and the plurality of second protrusions 22 surround the outer periphery of the second bolt 2.

[0061] This ensures that the first protrusion 13 and the second protrusion 22 can fit together, and facilitates the processing of the first protrusion 13 and the second protrusion 22.

[0062] In some embodiments, both the first protrusion 13 and the second protrusion 22 are ratchet teeth. For example... Figure 3 and Figure 4 As shown.

[0063] In some embodiments, the thread of the second bolt 2 is provided with an annular groove 27 extending circumferentially.

[0064] like Figure 4 As shown, the end of the screw of the second bolt 2 facing the head of the second bolt 2 is provided with an annular groove 27, which is arranged around the axial direction of the second bolt 2.

[0065] Since the first bolt 1 and the second bolt 2 are self-locking and cannot be unscrewed from the nut 3, an annular groove 27 is provided on the thread of the second bolt 2. When it is necessary to disassemble the anti-loosening fastening assembly, a pulling force is applied to the head of the second bolt 2 so that the second bolt 2 breaks at the annular groove 27. Then the second bolt 2 is unscrewed from the nut 3, and then the first bolt 1 is unscrewed from the nut 3.

[0066] The following is for reference. Figures 1-5 Describes a vehicle according to an embodiment of the present utility model.

[0067] like Figures 1-5 As shown, the vehicle in this embodiment of the present invention includes a subframe 4, a body 5, and an anti-loosening fastening assembly.

[0068] The anti-loosening fastening assembly is the anti-loosening fastening assembly of this utility model embodiment. The nut 3 is welded to the vehicle body 5. The first bolt 1 passes through the subframe 4 and the vehicle body 5 and is connected to the nut 3. The second bolt 2 passes through the channel 12 of the first bolt 1 and is connected to the nut 3.

[0069] like Figure 1As shown, the nut 3 has a first internal thread 31 at one end that is welded to the vehicle body 5. The shank of the first bolt 1 passes through the subframe 4 and the vehicle body 5 in sequence, and then is screwed into the nut 3. It is threadedly connected to the first internal thread 31 through the first external thread 11. The portion of the subframe 4 and the vehicle body 5 through which the first bolt 1 passes is located between the head of the first bolt 1 and the nut 3. The second bolt 2 passes through the channel 12 and is threadedly connected to the second internal thread 32 through the second external thread 21. The head of the second bolt 2 abuts against the end of the head of the first bolt 1 that is away from the nut 3. Since the first bolt 1 and the second bolt 2 achieve self-locking through the engagement of the threads and the protrusion, the subframe 4 and the vehicle body 5 can be stably connected, and the loosening of the anti-loosening fastening components can be avoided.

[0070] In this embodiment of the vehicle, the subframe 4 and the body 5 are securely connected by the anti-loosening fastening assembly of this embodiment of the vehicle, and the connection is ensured to remain secure.

[0071] In the description of this utility model, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. 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.

[0072] Furthermore, the terms "first" and "second" are used only for distinction and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0073] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0074] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0075] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Furthermore, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0076] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A fastening assembly for preventing loosening, characterized in that, include: A first bolt (1), a second bolt (2), and a nut (3). The nut (3) has a first internal thread (31) and a second internal thread (32). The threads of the first internal thread (31) and the second internal thread (32) have opposite directions. The bolt of the first bolt (1) has a first external thread (11) that is adapted to the first internal thread (31). The bolt of the second bolt (2) has a second external thread (21) that is adapted to the second internal thread (32). The first bolt (1) has an axially penetrating channel (12) for passing through the bolt of the second bolt (2). The head of the first bolt (1) has a first protrusion (13), and the head of the second bolt (2) has a second protrusion (22). The first protrusion (13) and the second protrusion (22) are used to abut against each other to prevent the first bolt (1) and the second bolt (2) from loosening.

2. The anti-loosening fastening assembly according to claim 1, characterized in that, The first protrusion (13) has a first inclined surface (14) for sliding relative to the abutting second protrusion (22) when the second bolt (2) is tightened; and / or The second protrusion (22) has a second inclined surface (23) for sliding relative to the first protrusion (13) when the second bolt (2) is tightened.

3. The anti-loosening fastening assembly according to claim 2, characterized in that, The first protrusion (13) has an angle of 5° to 45° between one end face of the first bolt (1) along the circumference and the cross-section of the first bolt (1) to form the first inclined surface (14). The first protrusion (13) has an angle of 75° to 115° between the other end face of the first bolt (1) along the circumference and the cross-section of the first bolt (1) to form a first abutting surface (15) for abutting the second protrusion (22). The second protrusion (22) has an angle of 5° to 45° between one end face of the second bolt (2) along the circumference and the cross-section of the second bolt (2) to form the second inclined surface (23). The second protrusion (22) has an angle of 75° to 115° between the other end face of the second bolt (2) along the circumference and the cross-section of the second bolt (2) to form the second abutting surface (24) that abuts against the first protrusion (13).

4. The anti-loosening fastening assembly according to claim 2, characterized in that, The first inclined surface (14) extends along the axial direction of the first bolt (1) and is inclined along the circumferential or tangential direction of the first bolt (1); The second inclined surface (23) extends along the axial direction of the second bolt (2) and is inclined along the circumferential or tangential direction of the second bolt (2).

5. The anti-loosening fastening assembly according to claim 2, characterized in that, There are multiple first protrusions (13), and the multiple first protrusions (13) are arranged sequentially along the circumference of the first bolt (1); There are multiple second protrusions (22), and the multiple second protrusions (22) are arranged sequentially along the circumference of the second bolt (2); The first protrusion (13) is used to fit between adjacent second protrusions (22), and the second protrusion (22) is used to fit between adjacent first protrusions (13).

6. The anti-loosening fastening assembly according to claim 5, characterized in that, The head of the second bolt (2) includes a second body (25) and a second flange (26), and the second flange (26) of the second bolt (2) is provided with a plurality of second protrusions (22).

7. The anti-loosening fastening assembly according to claim 2, characterized in that, Both the first protrusion (13) and the second protrusion (22) are ratchet teeth.

8. The anti-loosening fastening assembly according to claim 1, characterized in that, The second bolt (2) has a circumferentially extending annular groove (27) on its thread.

9. The anti-loosening fastening assembly according to claim 1, characterized in that, The first protrusion (13) can extend and retract from the head of the first bolt (1); and / or The second protrusion (22) can extend and retract from the head of the second bolt (2).

10. A vehicle, characterized in that, include: The subframe (4), the body (5), and the anti-loosening fastening assembly, wherein the anti-loosening fastening assembly is any one of claims 1-9, the nut (3) is welded to the body (5), the first bolt (1) passes through the subframe (4) and the body (5) and is connected to the nut (3), and the second bolt (2) passes through the channel (12) of the first bolt (1) and is connected to the nut (3).

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