Fastening assembly and battery pack

Abstract

The utility model provides a fastening assembly and a battery pack, the fastening assembly comprises a bolt and a nut, the bolt comprises a threaded rod and a bolt head, the threaded rod comprises a first end and a second end which are opposite, the first end of the threaded rod is connected with the bolt head, and the second end of the threaded rod is provided with an end face; a threaded hole is formed in one end of the nut and used for being in threaded connection with the threaded rod, and a bottom face opposite to the end face is arranged in the threaded hole. Wherein one of the bottom face and the end face is provided with at least one clamping tooth, the other one of the bottom face and the end face is provided with at least one clamping groove, and the at least one clamping tooth is used for being inserted into the at least one clamping groove to limit the bolt to rotate relative to the nut in the screwing-out direction, so that the problem that when the fastening assembly is vibrated, the bolt is prone to rotating in the screwing-out direction is solved. And the technical problem that the bolt and the nut are loosened is solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a fastening assembly and a battery pack. Background Art

[0002] In the related art, the bolts and nuts of the fastening assembly are connected together by threaded connection to achieve the fixation of the fixed structure. When the fastening assembly is subjected to vibration, the bolts are likely to rotate in the unscrewing direction, causing the bolts and nuts to loosen. Utility Model Content

[0003] The embodiments of the present application provide a fastening assembly and a battery pack, which can improve the technical problem that when the fastening assembly is subjected to vibration, the bolt is easily rotated in the unscrewing direction, causing the bolt and nut to loosen.

[0004] In a first aspect, an embodiment of the present application provides a fastening assembly, comprising:

[0005] A bolt comprising a threaded rod and a bolt head, wherein the threaded rod comprises a first end and a second end opposite to each other, the first end of the threaded rod being connected to the bolt head, and the second end of the threaded rod having an end surface;

[0006] a nut, wherein one end of the nut is provided with a threaded hole, the threaded hole being used for threaded connection with the threaded rod, and the threaded hole having a bottom surface opposite to the end surface;

[0007] One of the bottom surface and the end surface is provided with at least one latching tooth, and the other of the bottom surface and the end surface is provided with at least one latching groove, and the at least one latching tooth is used to be inserted into the at least one latching groove to limit the bolt from rotating relative to the nut in the unscrewing direction.

[0008] In some embodiments, the end surface is provided with the at least one latching tooth, and the bottom surface is provided with the at least one latching groove.

[0009] In some embodiments, the end surface is provided with a plurality of the latch teeth, and the plurality of the latch teeth are sequentially distributed along the circumference of the threaded rod;

[0010] The bottom surface is provided with a plurality of the clamping grooves, and the plurality of the clamping grooves are distributed in sequence along the circumference of the threaded hole.

[0011] In some embodiments, the plurality of latch teeth are symmetrically arranged about the center line of the threaded rod;

[0012] The plurality of slots are symmetrically arranged about the center line of the threaded hole.

[0013] In some embodiments, the end surface is provided with a plurality of the latching teeth and a plurality of the latching grooves, and the plurality of the latching teeth and the plurality of the latching grooves on the end surface are alternately distributed along the circumference of the threaded rod;

[0014] The bottom surface is provided with a plurality of the latching teeth and a plurality of the latching grooves, and the plurality of the latching teeth and the plurality of the latching grooves on the bottom surface are alternately distributed along the circumference of the threaded hole.

[0015] In some embodiments, the teeth on the bolt extend from the edge of the end face to the centerline of the threaded rod; and / or,

[0016] The latching teeth on the nut extend from the inner side surface of the threaded hole to the center line of the threaded hole.

[0017] In some embodiments, the height of the latch teeth in the longitudinal direction of the threaded rod is greater than or equal to 0.4 mm and less than or equal to 1 mm; and / or,

[0018] The height of the clamping groove in the length direction of the threaded rod is greater than or equal to 0.4 mm and less than or equal to 1 mm.

[0019] In some embodiments, the surface of the latching tooth facing the latching slot is an inclined surface;

[0020] wherein, in the screwing-out direction of the bolt, the distance between the inclined surface and the end surface of the bolt gradually increases; or,

[0021] Wherein, in the screwing-out direction of the bolt, the distance between the inclined surface and the bottom surface of the nut gradually decreases.

[0022] In some embodiments, the length of the threaded rod is greater than or equal to the depth of the threaded hole.

[0023] In a third aspect, an embodiment of the present application provides a battery pack, the battery pack including the fastening assembly as described above, the fastening assembly including:

[0024] A bolt comprising a threaded rod and a bolt head, wherein the threaded rod comprises a first end and a second end opposite to each other, the first end of the threaded rod being connected to the bolt head, and the second end of the threaded rod having an end surface;

[0025] a nut, wherein one end of the nut is provided with a threaded hole, the threaded hole being used for threaded connection with the threaded rod, and the threaded hole having a bottom surface opposite to the end surface;

[0026] One of the bottom surface and the end surface is provided with at least one latching tooth, and the other of the bottom surface and the end surface is provided with at least one latching groove, and the at least one latching tooth is used to be inserted into the at least one latching groove to limit the bolt from rotating relative to the nut in the unscrewing direction.

[0027] Beneficial effects of the embodiments of the present application:

[0028] In an embodiment of the present application, at least one latching tooth is provided on one of the bottom surface of the threaded hole and the end surface of the threaded rod, and at least one latching groove is provided on the other of the bottom surface of the threaded hole and the end surface of the threaded rod, so that the at least one latching tooth is inserted into the at least one latching groove to restrict the bolt from rotating relative to the nut in the unscrewing direction. Thus, when the threaded rod of the bolt is screwed into the threaded hole in the screwing direction and the latching tooth on the end surface of the threaded rod is inserted into the latching groove on the bottom surface of the threaded hole, or when the latching tooth on the bottom surface of the threaded hole is inserted into the latching groove on the end surface of the threaded rod, the bolt can be restricted from rotating relative to the nut in the unscrewing direction, thereby improving the technical problem that when the fastening assembly is subjected to vibration, the bolt is easily rotated in the unscrewing direction, causing the bolt and nut to loosen. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic structural diagram of an embodiment of a fastening assembly provided in an embodiment of the present application;

[0031] Figure 2 for Figure 1 Cross-sectional view along AA direction;

[0032] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0033] Figure 4 A schematic structural diagram of an embodiment of a bolt provided in an embodiment of the present application;

[0034] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0035] Figure 6 A schematic structural diagram of an embodiment of a nut provided in an embodiment of the present application;

[0036] Figure 7 for Figure 6 Cross-sectional view in the BB direction.

[0037] Fastening assembly 100; bolt 110; bolt head 111; threaded rod 112; external thread 1120; first end 1121; second end 1122; end face 1123; latching teeth 1124; abutting surface 1125; inclined surface 1126; nut 120; threaded hole 1200; internal thread 1201; bottom surface 1202; latching groove 1203; limiting surface 1204; screw-in direction M; screw-out direction N; center line L1; center line L2. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present application. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; and "inside" and "outside" refer to the outline of the device.

[0039] An embodiment of the present application provides a fastening assembly.

[0040] Figure 1 A schematic structural diagram of an embodiment of a fastening assembly provided in an embodiment of the present application. Figure 2 for Figure 1 Cross-sectional view along AA direction. Figure 6 This is a schematic diagram of the structure of an embodiment of a nut provided in an embodiment of the present application. Figure 1 、 Figure 2 and Figure 6 As shown, fastening assembly 100 includes a bolt 110 and a nut 120. Bolt 110 includes a threaded rod 112 and a bolt head 111. Threaded rod 112 includes a first end 1121 and a second end 1122, opposite each other. First end 1121 of threaded rod 112 is connected to bolt head 111. Nut 120 has a threaded hole 1200 at one end for threaded connection with threaded rod 112. The threaded head of bolt 110 and nut 120 can clamp the structure to be fastened, thereby securing the structure.

[0041] The inner circumference of the threaded hole 1200 is provided with an internal thread 1201, and the outer circumference of the threaded rod 112 is provided with an external thread 1120 adapted to the internal thread 1201. Figure 4As shown, the threaded rod 112 is screwed into the threaded hole 1200 along the screwing direction M so that the external thread 1120 of the threaded rod 112 engages with the internal thread 1201 of the threaded hole 1200 , thereby connecting the threaded rod 112 to the threaded hole 1200 .

[0042] When it is necessary to remove the threaded rod 112 of the bolt 110 from the threaded hole 1200 of the nut 120, the bolt 110 is rotated relative to the nut 120 in the screwing direction N to remove the bolt 110 from the threaded hole 1200, so that the external thread 1120 of the threaded rod 112 is disengaged from the internal thread 1201 of the threaded hole 1200.

[0043] It should be noted that the screwing direction M of the bolt 110 can be determined according to the spiral direction of the external thread 1120 of the threaded rod 112. The screwing direction M of the bolt 110 is opposite to the screwing direction N. When the screwing direction M is clockwise, the screwing direction N is counterclockwise. When the screwing direction M is counterclockwise, the screwing direction N is clockwise.

[0044] like Figure 2 、 Figure 3 、 Figure 6 and Figure 7 As shown, the second end 1122 of the threaded rod 112 has an end surface 1123. The threaded hole 1200 of the nut 120 has a bottom surface 1202 opposite to the end surface 1123. When the threaded rod 112 is screwed into the threaded hole 1200 along the screwing direction M and engages with the internal thread 1201 on the inner circumference of the threaded hole 1200, the end surface 1123 of the second end 1122 of the threaded rod 112 is disposed opposite to the bottom surface 1202 of the threaded hole 1200.

[0045] Specifically, the threaded hole 1200 of the nut 120 has an opening formed at one end of the nut 120 for threading the threaded rod 112 in the screwing direction M. The bottom surface 1202 is located at the end of the threaded hole 1200 away from the opening. The threaded hole 1200 of the nut 120 is a blind hole, meaning that the bottom surface 1202 of the threaded hole 1200 does not have a through hole. Alternatively, a through hole may be formed in the bottom surface 1202 of the threaded hole 1200 of the nut 120, so that the threaded hole 1200 extends through the nut 120.

[0046] In some embodiments, at least one latching tooth 1124 may be provided on one of the bottom surface 1202 of the threaded hole 1200 and the end surface 1123 of the threaded rod 112, and at least one latching groove 1203 may be provided on the other of the bottom surface 1202 of the threaded hole 1200 and the end surface 1123 of the threaded rod 112, so that the at least one latching tooth 1124 is used to be inserted into the at least one latching groove 1203 to limit the rotation of the bolt 110 relative to the nut 120 along the unscrewing direction N.

[0047] Therefore, when the threaded rod 112 of the bolt 110 is screwed into the threaded hole 1200 along the screw-in direction M, and the locking teeth 1124 of the end face 1123 of the threaded rod 112 are inserted into the locking groove 1203 of the bottom face 1202 of the threaded hole 1200, or the locking teeth 1124 of the bottom face 1202 of the threaded hole 1200 are inserted into the locking groove 1203 of the end face 1123 of the threaded rod 112, the bolt 110 can be restricted from rotating relative to the nut 120 along the screw-out direction N, which is beneficial to avoid the technical problem that when the fastening assembly 100 is subjected to vibration, the bolt 110 is prone to rotate along the screw-out direction N, causing the bolt 110 and the nut 120 to loosen.

[0048] At least one latching tooth 1124 may be provided on the end surface 1123 of the threaded rod 112, and at least one latching groove 1203 may be provided on the bottom surface 1202 of the threaded hole 1200. Alternatively, at least one latching groove 1203 may be provided on the end surface 1123 of the threaded rod 112, and at least one latching tooth 1124 may be provided on the bottom surface 1202 of the threaded hole 1200. Furthermore, at least one latching tooth 1124 and at least one latching groove 1203 may be provided on the end surface 1123 of the threaded rod 112, and at least one latching tooth 1124 and at least one latching groove 1203 may be provided on the bottom surface 1202 of the threaded hole 1200.

[0049] In some embodiments, as Figure 4 、 Figure 5 and Figure 7 As shown, the end surface 1123 of the threaded rod 112 may be provided with a plurality of latching teeth 1124 and a plurality of latching grooves 1203, and the plurality of latching teeth 1124 and the plurality of latching grooves 1203 on the end surface 1123 of the threaded rod 112 may be alternately distributed along the circumference of the threaded rod 112. Correspondingly, the bottom surface 1202 of the threaded hole 1200 may be provided with a plurality of latching teeth 1124 and a plurality of latching grooves 1203, and the plurality of latching teeth 1124 and the plurality of latching grooves 1203 on the bottom surface 1202 of the threaded hole 1200 may be alternately distributed along the circumference of the threaded hole 1200. When the threaded rod 112 of the bolt 110 is screwed into the threaded hole 1200 along the screw-in direction M, the multiple teeth 1124 on the end face 1123 of the threaded rod 112 are inserted one by one into the multiple grooves 1203 on the bottom face 1202 of the threaded hole 1200, and the multiple teeth 1124 on the bottom face 1202 of the threaded hole 1200 are inserted one by one into the multiple grooves 1203 on the end face 1123 of the threaded rod 112, thereby further improving the restriction effect on the rotation of the bolt 110 relative to the nut 120 along the screw-out direction N, making the connection between the bolt 110 and the nut 120 more stable.

[0050] In other embodiments, a plurality of latching teeth 1124 may be provided on the end surface 1123 of the threaded rod 112, and a plurality of latching grooves 1203 may be provided on the bottom surface 1202 of the threaded hole 1200. When the threaded rod 112 of the bolt 110 is screwed into the threaded hole 1200 along the screw-in direction M, the plurality of latching teeth 1124 on the end surface 1123 of the threaded rod 112 are inserted into the plurality of latching grooves 1203 on the bottom surface 1202 of the threaded hole 1200 in a one-to-one correspondence, thereby further enhancing the effect of restricting the rotation of the bolt 110 relative to the nut 120 along the screw-out direction N, thereby making the connection between the bolt 110 and the nut 120 more stable.

[0051] Among them, the multiple teeth 1124 on the end face 1123 of the threaded rod 112 can be distributed in sequence along the circumference of the threaded rod 112, and the multiple grooves 1203 on the bottom surface 1202 of the threaded hole 1200 can be distributed in sequence along the circumference of the threaded hole 1200, so that when the threaded rod 112 of the bolt 110 is screwed into the threaded hole 1200 along the screw-in direction M, the multiple teeth 1124 on the end face 1123 of the threaded rod 112 are inserted one by one into the multiple grooves 1203 on the bottom surface 1202 of the threaded hole 1200.

[0052] In other embodiments, a plurality of retaining grooves 1203 may be provided on the end surface 1123 of the threaded rod 112, and a plurality of retaining teeth 1124 may be provided on the bottom surface 1202 of the threaded hole 1200. When the threaded rod 112 of the bolt 110 is screwed into the threaded hole 1200 along the screw-in direction M, the plurality of retaining teeth 1124 on the bottom surface 1202 of the threaded hole 1200 are inserted into the plurality of retaining grooves 1203 on the end surface 1123 of the threaded rod 112 in a one-to-one correspondence. This can further enhance the effect of restricting the rotation of the bolt 110 relative to the nut 120 along the screw-out direction N, thereby making the connection between the bolt 110 and the nut 120 more stable.

[0053] Among them, the multiple grooves 1203 of the end face 1123 of the threaded rod 112 can be distributed in sequence along the circumference of the threaded rod 112, and the multiple teeth 1124 of the bottom surface 1202 of the threaded hole 1200 can be distributed in sequence along the circumference of the threaded hole 1200, so that when the threaded rod 112 of the bolt 110 is screwed into the threaded hole 1200 along the screw-in direction M, the multiple teeth 1124 on the bottom surface 1202 of the threaded hole 1200 are inserted one by one into the multiple grooves 1203 of the end face 1123 of the threaded rod 112.

[0054] In some embodiments, when the end face 1123 of the threaded rod 112 is provided with multiple teeth 1124 and the bottom surface 1202 of the threaded hole 1200 is provided with multiple grooves 1203, the multiple teeth 1124 of the end face 1123 of the threaded rod 112 can be symmetrically arranged about the center line L1 of the threaded rod 112. At the same time, the multiple grooves 1203 of the bottom surface 1202 of the threaded hole 1200 are symmetrically arranged about the center line L2 of the threaded hole 1200, so that one tooth 1124 can be adapted to multiple different grooves 1203, and one groove 1203 can be adapted to multiple different teeth 1124, so that the teeth 1124 and the grooves 1203 can be adapted to each other when the threaded rod 112 is at multiple different angles in the threaded hole 1200.

[0055] Similarly, when the end face 1123 of the threaded rod 112 is provided with a plurality of grooves 1203 and the bottom surface 1202 of the threaded hole 1200 is provided with a plurality of teeth 1124, the plurality of grooves 1203 of the end face 1123 of the threaded rod 112 can be symmetrically arranged about the center line L1 of the threaded rod 112, and at the same time, the plurality of teeth 1124 of the bottom surface 1202 of the threaded hole 1200 can be symmetrically arranged about the center line L2 of the threaded hole 1200.

[0056] In some embodiments, as Figures 3 to 5 As shown, when the end face 1123 of the threaded rod 112 of the bolt 110 is provided with a latching tooth 1124, the latching tooth 1124 located on the bolt 110 can be extended from the edge of the end face 1123 of the threaded rod 112 to the center line L1 of the threaded rod 112, thereby increasing the radial size of the latching tooth 1124 in the threaded rod 112 as much as possible. When the latching tooth 1124 is inserted into the corresponding latching groove 1203, the limiting effect of the threaded rod 112 on the rotation along the screw-out direction N can be greatly improved.

[0057] like Figure 5 and Figure 7 As shown, the latching tooth 1124 includes an abutment surface 1125, and the inner side surface of the latching groove 1203 includes a limiting surface 1204. The limiting surface 1204 is configured to abut against the abutment surface 1125 to limit rotation of the bolt 110 relative to the nut 120 in the screwing-out direction N. When the end surface 1123 of the threaded rod 112 is provided with the latching tooth 1124, the abutment surface 1125 of the latching tooth 1124 is located on one side of the threaded rod 112 in the screwing-out direction N. The abutment surface 1125 of the latching tooth 1124 on the bolt 110 extends from the edge of the end surface 1123 to the centerline L1 of the threaded rod 112, thereby maximizing the radial dimension of the latching tooth 1124 on the threaded rod 112.

[0058] Similarly, when the bottom surface 1202 of the threaded hole 1200 is provided with a latch 1124, the latch 1124 located on the nut 120 can be extended from the inner side surface of the threaded hole 1200 to the center line L2 of the threaded hole 1200, thereby increasing the radial size of the latch 1124 in the threaded hole 1200 as much as possible. When the latch 1124 is inserted into the corresponding slot 1203, the limiting effect of the threaded rod 112 on the rotation along the screw-out direction N can be greatly improved.

[0059] When the bottom surface 1202 of the threaded hole 1200 is provided with a latching tooth 1124, the abutting surface 1125 of the latching tooth 1124 is located on one side of the threaded rod 112 along the screwing direction M. The abutting surface 1125 of the latching tooth 1124 on the nut 120 can be extended from the inner circumferential surface of the threaded hole 1200 to the center line L2 of the threaded hole 1200, thereby maximizing the radial dimension of the latching tooth 1124 in the threaded hole 1200.

[0060] It should be noted that the latching teeth 1124 located on the bolt 110 can be extended from the edge of the end face 1123 of the threaded rod 112 to the center line L1 of the threaded rod 112, and the latching teeth 1124 located on the nut 120 can be extended from the inner side surface of the threaded hole 1200 to the center line L2 of the threaded hole 1200. Alternatively, only the latching teeth 1124 located on the bolt 110 can be extended from the edge of the end face 1123 of the threaded rod 112 to the center line L1 of the threaded rod 112, or only the latching teeth 1124 located on the nut 120 can be extended from the inner side surface of the threaded hole 1200 to the center line L2 of the threaded hole 1200, which can be determined according to the setting position of the latching teeth 1124.

[0061] In some embodiments, the height of the latch tooth 1124 in the length direction of the threaded rod 112 can be greater than or equal to 0.4 mm, so that the latch tooth 1124 can be inserted deeper into the corresponding slot 1203, thereby improving the matching stability between the latch tooth 1124 and the corresponding slot 1203 and reducing the risk of the latch tooth 1124 producing elastic deformation and falling out of the slot 1203.

[0062] The latch teeth 1124 may be located on the bolt 110 or on the nut 120. The height of the latch teeth 1124 in the length direction of the threaded rod 112 may be 0.5 mm, 0.55 mm, 0.7 mm, 0.9 mm, etc., depending on the size of the bolt 110 and the nut 120.

[0063] Furthermore, the height of the latching teeth 1124 along the length of the threaded rod 112 can be less than or equal to 1 mm to avoid the problem of the latching teeth 1124 being too tall and difficult to insert into the corresponding latching groove 1203 when the threaded rod 112 is screwed into the threaded hole 1200 along the screwing direction M. The height of the latching teeth 1124 along the length of the threaded rod 112 can be 0.6 mm, 0.65 mm, 0.75 mm, 0.8 mm, etc., depending on the dimensions of the bolt 110 and the nut 120.

[0064] It is understood that, as the threaded rod 112 is screwed into the threaded hole 1200 along the screwing direction M, the latching teeth 1124 will first come into contact with the inner surface of the threaded hole 1200 or the end surface 1123 of the threaded rod 112 and undergo elastic deformation. After the latching teeth 1124 rotate relative to each other to a position corresponding to the slot 1203, the shape of the latching teeth 1124 will return to its initial state and be inserted into the corresponding slot 1203. If the height of the latching teeth 1124 in the longitudinal direction of the threaded rod 112 is too great, the amount of deformation required before the latching teeth 1124 can be inserted into the corresponding slot 1203 will also be greater, resulting in greater resistance to the screwing of the threaded rod 112, making it impossible for the latching teeth 1124 to rotate relative to each other to a position corresponding to the slot 1203, thereby hindering the insertion of the latching teeth 1124 into the corresponding slot 1203.

[0065] Similarly, the depth of the slot 1203 in the length direction of the threaded rod 112 can be greater than or equal to 0.4 mm, so that the depth of the tooth 1124 inserted into the slot 1203 is deep enough, thereby improving the matching stability between the tooth 1124 and the corresponding slot 1203 and reducing the risk of the tooth 1124 being elastically deformed and falling out of the slot 1203.

[0066] The slot 1203 may be located on the threaded rod 112 or on the bottom surface 1202 of the threaded hole 1200. The depth of the slot 1203 along the length of the threaded rod 112 may be 0.5 mm, 0.55 mm, 0.7 mm, 0.9 mm, etc., depending on the size of the bolt 110 and the nut 120.

[0067] In addition, the depth of the slot 1203 along the length of the threaded rod 112 can be less than or equal to 1 mm to prevent the slot 1203 from being too deep and affecting the structural strength of the threaded rod 112 or the nut 120. The depth of the slot 1203 along the length of the threaded rod 112 can be 0.6 mm, 0.65 mm, 0.75 mm, 0.8 mm, etc., depending on the size of the bolt 110 and the nut 120.

[0068] In some embodiments, the length of the threaded rod 112 can be greater than or equal to the depth of the threaded hole 1200, so that after the threaded rod 112 is screwed into the threaded hole 1200 along the screw-in direction M, the tooth 1124 on the end face 1123 of the threaded rod 112 can be inserted into the groove 1203 on the bottom face 1202 of the threaded hole 1200, or the tooth 1124 on the bottom face 1202 of the threaded hole 1200 can be inserted into the groove 1203 on the end face 1123 of the threaded rod 112.

[0069] In some embodiments, Figure 5 As shown, the surface of the latching tooth 1124 facing the slot 1203 can be formed into an inclined surface 1126. When the end surface 1123 of the threaded rod 112 is provided with the latching tooth 1124, the distance between the inclined surface 1126 of the latching tooth 1124 and the end surface 1123 gradually increases in the screwing-out direction N of the bolt 110. This facilitates the latching tooth 1124 to abut against the bottom surface 1202 of the threaded hole 1200 via the inclined surface 1126 when the threaded rod 112 is screwed into the threaded hole 1200 in the screwing-in direction M, making it easier for the latching tooth 1124 to elastically deform. Furthermore, the abutting surface 1125 of the latching tooth 1124 can be made larger, which helps increase the contact area between the abutting surface 1125 of the latching tooth 1124 and the limiting surface 1204 of the slot 1203, thereby improving the mating stability between the latching tooth 1124 and the corresponding slot 1203.

[0070] When the bottom surface 1202 of the threaded hole 1200 is provided with a latching tooth 1124, the distance between the inclined surface 1126 of the latching tooth 1124 of the nut 120 and the bottom surface 1202 gradually decreases in the screwing-out direction N of the bolt 110. This allows the latching tooth 1124 to abut against the end surface 1123 of the threaded rod 112 via the inclined surface 1126 when the threaded rod 112 is screwed into the threaded hole 1200 in the screwing-in direction M, making it easier for the latching tooth 1124 to elastically deform. Furthermore, the abutting surface 1125 of the latching tooth 1124 has a larger area, which helps to increase the contact area between the abutting surface 1125 of the latching tooth 1124 and the limiting surface 1204 of the slot 1203, thereby improving the mating stability of the latching tooth 1124 and the corresponding slot 1203.

[0071] An embodiment of the present application also provides a battery pack, which includes a fastening assembly. The specific structure of the fastening assembly refers to the above embodiment. Since this battery pack adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0072] The above is a detailed introduction to the embodiments of the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. At the same time, for those skilled in the art, based on the ideas of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A fastening assembly, characterized in that: include: A bolt comprising a threaded rod and a bolt head, wherein the threaded rod comprises a first end and a second end opposite to each other, the first end of the threaded rod being connected to the bolt head, and the second end of the threaded rod having an end surface; a nut, wherein one end of the nut is provided with a threaded hole, the threaded hole being used for threaded connection with the threaded rod, and the threaded hole having a bottom surface opposite to the end surface; One of the bottom surface and the end surface is provided with at least one latching tooth, and the other of the bottom surface and the end surface is provided with at least one latching groove, and the at least one latching tooth is used to be inserted into the at least one latching groove to limit the bolt from rotating relative to the nut in the unscrewing direction.

2. The fastening assembly according to claim 1, wherein: The end surface is provided with the at least one latching tooth, and the bottom surface is provided with the at least one latching groove.

3. The fastening assembly according to claim 2, wherein: The end surface is provided with a plurality of the latch teeth, and the plurality of the latch teeth are sequentially distributed along the circumference of the threaded rod; The bottom surface is provided with a plurality of the clamping grooves, and the plurality of the clamping grooves are distributed in sequence along the circumference of the threaded hole.

4. The fastening assembly according to claim 3, wherein: The plurality of latch teeth are symmetrically arranged about the center line of the threaded rod; The plurality of slots are symmetrically arranged about the center line of the threaded hole.

5. The fastening assembly according to any one of claims 1 to 4, characterized in that The end surface is provided with a plurality of the latching teeth and a plurality of the latching grooves, and the plurality of the latching teeth and the plurality of the latching grooves on the end surface are alternately distributed along the circumference of the threaded rod; The bottom surface is provided with a plurality of the latching teeth and a plurality of the latching grooves, and the plurality of the latching teeth and the plurality of the latching grooves on the bottom surface are alternately distributed along the circumference of the threaded hole.

6. The fastening assembly according to any one of claims 1 to 4, wherein: The teeth on the bolt extend from the edge of the end face to the center line of the threaded rod; and / or, The latching teeth on the nut extend from the inner side surface of the threaded hole to the center line of the threaded hole.

7. The fastening assembly according to claim 6, wherein: The height of the latch teeth in the longitudinal direction of the threaded rod is greater than or equal to 0.4 mm and less than or equal to 1 mm; and / or, The height of the clamping groove in the length direction of the threaded rod is greater than or equal to 0.4 mm and less than or equal to 1 mm.

8. The fastening assembly according to any one of claims 1 to 4, wherein: The surface of the latching tooth facing the latching slot is an inclined surface; wherein, in the screwing-out direction of the bolt, the distance between the inclined surface and the end surface of the bolt gradually increases; or, Wherein, in the screwing-out direction of the bolt, the distance between the inclined surface and the bottom surface of the nut gradually decreases.

9. The fastening assembly according to any one of claims 1 to 4, wherein: The length of the threaded rod is greater than or equal to the depth of the threaded hole.

10. A battery pack, characterized in that: The battery pack includes the fastening assembly according to any one of claims 1 to 9.

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