CN220268169U - Anti-rotation bolt, bolt connection structure and battery box - Google Patents

Abstract

The application discloses an anti-rotation bolt, a bolt connection structure and a battery box body, wherein the anti-rotation bolt comprises a bolt body provided with a bolt head and a screw rod, and an anti-rotation cap clamped on the bolt head; the outer peripheral surface of the bolt head is provided with a limit bulge; the anti-rotation cap is provided with an accommodating space, the inner peripheral wall of the accommodating space is provided with a limiting groove, when the anti-rotation cap is clamped on the bolt head, the bolt head is installed in the accommodating space, and the limiting protrusion is matched with the limiting groove; the outer peripheral surface of the anti-rotation cap is also provided with an anti-rotation convex strip which is used for being installed in an anti-rotation groove of the connected piece. The anti-rotation convex strip is arranged along the axial direction of the anti-rotation cap. The anti-rotation cap is arranged to limit the rotation of the bolt head, and the anti-rotation convex strips are arranged on the peripheral surface of the anti-rotation cap to limit the rotation of the anti-rotation cap relative to the connected piece, so that the rotation of the bolt body is limited, and a better anti-rotation effect is achieved; the anti-rotation cap is simple in integral structure, and the installation mode is higher in installation efficiency compared with the common bolt by only installing the anti-rotation cap.

Description

Anti-rotation bolt, bolt connection structure and battery box

Technical Field

The application relates to the technical field of fastening structures, in particular to an anti-rotation bolt, a bolt connection structure and a battery box body.

Background

Part of the positions inside the battery box body are connected through bolts, and bolts with anti-rotation functions are needed to be selected for certain specific positions so as to improve connection stability. The anti-rotation function of the current bolt is that the spring washer is arranged, so that the anti-loosening function is realized by means of the longitudinal elastic force generated by the spring washer and the friction force between the spring washer and the supporting surface of the connected piece; secondly, mechanical anti-loosening is realized through cotter pins, stop washers, steel wire series connection and the like; thirdly, after the installation of the bolts, the thread structure is destroyed by riveting, impacting, bonding and the like to realize rotation prevention. The first mode is poor in anti-loosening effect, the second mode and the third mode are good in anti-loosening effect, the mounting step is complex, and the mounting efficiency is low.

Disclosure of Invention

The utility model aims at overcoming the defect of the prior art, and provides an anti-rotation bolt, a bolt connection structure and a battery box body which are applicable to a lithium battery Pack production line.

The technical scheme of the application provides an anti-rotation bolt which comprises a bolt body provided with a bolt head and a screw rod, and an anti-rotation cap clamped on the bolt head;

the outer peripheral surface of the bolt head is provided with a limiting protrusion;

the anti-rotation cap is provided with an accommodating space, the inner peripheral wall of the accommodating space is provided with a limiting groove, when the anti-rotation cap is clamped on the bolt head, the bolt head is installed in the accommodating space, and the limiting protrusion is matched with the limiting groove;

the outer peripheral surface of the anti-rotation cap is also provided with an anti-rotation convex strip which is arranged in an anti-rotation groove of the connected piece, and the anti-rotation convex strip is arranged along the axial direction of the anti-rotation cap.

Further, a clamping groove arranged along the circumferential direction is formed in the bolt head, a clamping hook is arranged in the anti-rotation cap, and the clamping hook is installed in the clamping groove so that the anti-rotation cap is clamped with the bolt head.

Further, at least two clamping hooks are arranged in the anti-rotation cap, the clamping hooks are circumferentially arranged on the inner peripheral wall of the accommodating space, and a notch is arranged between every two adjacent clamping hooks.

Further, an annular flange is arranged below the bolt head, and the clamping groove is formed between the bolt head and the annular flange.

Further, the diameter of the annular flange is greater than the diameter of the bolt head.

Further, the bolt head, the screw rod and the annular flange are integrally formed, and the bolt head is in an equilateral hexagonal prism shape.

Further, the anti-rotation cap is formed by injection molding of plastic materials, the accommodating space is in an equilateral hexagonal prism shape, and when the anti-rotation cap is clamped on the bolt head, the outer surface of the bolt head is tightly attached to the inner wall of the accommodating space.

The technical scheme of the application also provides a bolt connecting structure, which comprises a first piece, a second piece and the anti-rotation bolt, wherein the first piece is provided with an anti-rotation hole and a threaded hole, and the second piece is provided with a connecting hole;

the screw rod of the bolt body passes through the anti-rotation hole and the connecting hole and then is in threaded connection with the threaded hole, the anti-rotation cap passes through the anti-rotation hole and is in clamping connection with the bolt head, an anti-rotation groove corresponding to the anti-rotation convex strip is formed in the anti-rotation hole, and the anti-rotation convex strip is installed in the corresponding anti-rotation groove.

Further, a blind rivet nut is riveted to the first member, and the threaded hole is formed in the blind rivet nut.

The technical scheme of this application still provides a battery box, includes as aforementioned bolted connection structure.

After the technical scheme is adopted, the method has the following beneficial effects:

according to the anti-rotation bolt, the limiting protrusion is arranged on the outer peripheral surface of the bolt head, the limiting groove is arranged in the accommodating space of the anti-rotation cap and matched with the limiting protrusion, so that the anti-rotation cap cannot rotate relative to the bolt head when the anti-rotation cap is clamped on the bolt head, meanwhile, the anti-rotation protruding strip is arranged on the outer peripheral surface of the anti-rotation cap and used for being installed in the corresponding anti-rotation groove in the connected piece, the anti-rotation cap can be limited to rotate relative to the connected piece, rotation of the bolt body is limited, and a better anti-rotation effect is achieved through limiting; the anti-rotation bolt is simple in structure, and the installation mode of the anti-rotation bolt is compared with the common bolt, and the anti-rotation bolt has higher installation efficiency due to the fact that only the step of installing the anti-rotation cap is more.

Drawings

The disclosure of the present application will become more readily understood with reference to the accompanying drawings. It should be understood that: the drawings are for illustrative purposes only and are not intended to limit the scope of the present application. In the figure:

FIG. 1 is a schematic view of a structure of an anti-rotation bolt according to an embodiment of the present application;

FIG. 2 is a schematic view of a bolt body according to an embodiment of the present application;

FIG. 3 is a schematic view of the structure of an anti-rotation cap according to an embodiment of the present application;

FIG. 4 is a top view of an anti-spin cap according to one embodiment of the present application;

FIG. 5 is a schematic view of a bolt connection structure according to an embodiment of the present application;

FIG. 6 is a schematic view of the structure of a first member of a bolting configuration according to an embodiment of the utility model;

FIG. 7 is a schematic view of the structure of the first member of the bolting configuration and the anti-rotation bolt according to an embodiment of the present application;

fig. 8 is a schematic structural view of a second member of the bolting configuration according to an embodiment of the application.

Reference numeral control table:

bolt body 01: the bolt head 11, the limit bulge 111, the clamping groove 112, the screw 12 and the annular flange 13;

anti-rotation cap 02: the accommodating space 21, the limit groove 211, the anti-rotation raised strips 22, the clamping hooks 23 and the notch 231;

first piece 03: anti-rotation hole 31, anti-rotation groove 311, rivet nut 32, threaded hole 33;

second piece 04: and a connection hole 41.

Detailed Description

Specific embodiments of the present application are further described below with reference to the accompanying drawings.

It is easy to understand that, according to the technical solution of the present application, those skilled in the art may replace various structural manners and implementation manners without changing the true spirit of the present application. Accordingly, the following detailed description and drawings are merely illustrative of the present application and are not intended to be exhaustive or to be limiting of the application.

Terms of orientation such as up, down, left, right, front, rear, front, back, top, bottom, etc. mentioned or possible to be mentioned in the present specification are defined with respect to the configurations shown in the drawings, which are relative concepts, and thus may be changed according to different positions and different use states thereof. These and other directional terms should not be construed as limiting terms. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between the two components. The above-described specific meanings belonging to the present application are understood as appropriate by those of ordinary skill in the art.

Embodiment one:

the anti-rotation bolt in the embodiment of the application, as shown in fig. 1-4, comprises a bolt body 01 provided with a bolt head 11 and a screw 12, and an anti-rotation cap 02 clamped on the bolt head 11;

the outer circumferential surface of the bolt head 11 is provided with a limit protrusion 111;

the anti-rotation cap 02 is provided with an accommodating space 21, the inner peripheral wall of the accommodating space 21 is provided with a limiting groove 211, when the anti-rotation cap 02 is clamped on the bolt head 11, the bolt head 11 is installed in the accommodating space 21, and the limiting protrusion 111 is matched with the limiting groove 211;

the rotation preventing cap 02 is further provided with rotation preventing ribs 22 on the outer peripheral surface thereof for fitting into the rotation preventing grooves of the connected member, and the rotation preventing ribs 22 are provided in the axial direction of the rotation preventing cap 02.

Fig. 2 shows an example of the bolt body 01, which is composed of a bolt head 11 and a screw 12 connected to the lower end of the bolt head 12 in the axial direction, and the central axes of the bolt head 11 and the screw 12 are on the same straight line. Wherein, the outer peripheral surface of the bolt head 11 is provided with at least one limit protrusion 111 so that the bolt head 11 is not cylindrical.

Fig. 3 shows an example of the rotation preventing cap 02, the rotation preventing cap 02 has an annular structure, a receiving space 21 is formed in the axial direction of the rotation preventing cap 02, a limiting groove 211 corresponding to the limiting protrusion 111 is arranged in the receiving space 21, and when the bolt head 11 is mounted in the receiving space 21, the limiting protrusion 111 is correspondingly matched with the limiting groove 211 to limit the rotation of the rotation preventing cap 02 relative to the bolt head 11.

The outer peripheral surface of the anti-rotation cap 02 is also provided with an anti-rotation raised line 22 arranged along the axial direction, and the anti-rotation raised line 22 is used for being clamped into an anti-rotation groove of a connected piece, so that the rotation of the anti-rotation cap 02 relative to the connected piece is limited, and the rotation of the bolt body 01 is limited because the anti-rotation cap 02 and the bolt body 01 cannot rotate relatively. Preferably, in order to improve the stability of the anti-rotation effect, two or more anti-rotation protrusions 22 may be provided.

The anti-rotation bolt in the embodiment of the application is simple in structure, when the anti-rotation bolt is installed, the bolt body 01 is connected with two connecting pieces, then the anti-rotation cap 02 is clamped on the bolt head 11, and compared with a common bolt, the anti-rotation bolt is installed in a simpler mode by only installing the anti-rotation cap.

Optionally, the number and structure of the limit protrusions 111 on the outer peripheral surface of the bolt head 11 can be adjusted according to actual requirements, and when the limit protrusions 111 are sharp protrusions, the bolt head 11 is prismatic; the limiting protrusion 111 may be further provided as an arc protrusion and smoothly transits with the outer circumferential surface of the bolt head 11, for example, two axially symmetrical arc protrusions are provided, and the bolt head 11 has an elliptical cylinder shape.

Further, the bolt head 11 is provided with a clamping groove 112 arranged along the circumferential direction, the anti-rotation cap 02 is provided with a clamping hook 23, and the clamping hook 23 is mounted in the clamping groove 112 so that the anti-rotation cap 02 is clamped with the bolt head 11.

The locking groove 112 is an annular groove, which is disposed on the outer circumferential surface of the bolt head 11, and the locking hook 23 extends inward along the radial direction of the anti-rotation cap 02, and the locking hook 23 may be an annular locking hook or may be a plurality of locking hooks 23 disposed along the circumferential direction.

In this embodiment, as shown in fig. 4, six hooks 23 are disposed in the hexagonal prismatic cavity of the anti-rotation cap 02 corresponding to the accommodating space 21, and one hook 23 is disposed on each side of the hexagon. The hooks 23 are circumferentially disposed on the inner peripheral wall of the accommodating space 21, and a gap 231 is disposed between two adjacent hooks 23, so that the length of the hooks 23 can be shortened compared with the annular hooks, and the hooks 23 are more easily deformed and clamped into the clamping grooves 112.

Further, as shown in fig. 2, an annular flange 13 is provided below the bolt head 11, and a click-on groove 112 is formed between the bolt head 11 and the annular flange 13.

In the process of clamping the anti-rotation cap 02 to the bolt head 11, along with the pressing down of the anti-rotation cap 02, the clamping hook 23 is extruded and deformed by the bolt head 11 until the clamping hook 23 moves into the clamping groove 112 below the bolt head 11, the clamping hook 23 is not extruded and ejected any more, and the clamping hook 23 is limited in the clamping groove 112, so that the anti-rotation cap 02 is fixedly mounted on the bolt head 11.

Preferably, the diameter of the annular flange 13 is larger than the diameter of the bolt head 11, so that the upper surface of the annular flange 13 contacts with the lower surface of the anti-rotation cap 02, and supports the lower surface of the anti-rotation cap 02 to limit the anti-rotation cap 02.

In the embodiment of the application, the bolt body 01 is made of stainless steel material, and the bolt head 11, the screw 12 and the annular flange 13 are integrally formed. Six sharp protrusions are uniformly arranged on the outer peripheral surface of the bolt head 11, so that the bolt head 11 is in a hexagonal prism shape. The rotation preventing cap 02 is injection molded of a plastic material having a certain deformability, so that the rotation preventing cap 02 can be more smoothly mounted on the bolt head 11 and closely attached to the bolt head 11. In this embodiment, the accommodating space 21 is correspondingly provided in a hexagonal prism shape, and when the anti-rotation cap 02 is clamped on the bolt head 11, the outer surface of the bolt head 11 is tightly attached to the inner wall of the accommodating space 21.

Embodiment two:

the bolt connection structure in the embodiment of the application, as shown in fig. 5-8, comprises a first piece 03, a second piece 04 and an anti-rotation bolt in the first embodiment, wherein the first piece 03 is provided with an anti-rotation hole 31 and a threaded hole 33, and the second piece 04 is provided with a connection hole 41;

the screw rod 12 of the bolt body 01 passes through the rotation preventing hole 31 and the connecting hole 41 and then is in threaded connection with the threaded hole 33, the rotation preventing cap passes through the rotation preventing hole 31 and is in clamping connection with the bolt head 11, the rotation preventing hole 31 is provided with a rotation preventing groove 311 corresponding to the rotation preventing convex strip 22, and the rotation preventing convex strip 22 is installed in the corresponding rotation preventing groove 311.

In particular, an anti-rotation screw is used to connect the first piece 03 and the second piece 04.

As shown in fig. 6 and 7, the first member 03 is provided with an anti-rotation hole 31 and a threaded hole 33, and the axial directions of the anti-rotation hole 31 and the threaded hole 33 are on the same line, wherein an anti-rotation groove 311 is provided in the anti-rotation hole 31 for cooperation with the anti-rotation protrusion 22 in the anti-rotation cap 02. In the embodiment of the present application, the first member 03 is riveted with a blind rivet nut 32, and the threaded hole 33 is formed in the blind rivet nut 32.

As shown in fig. 8, the second member 04 is provided with a connecting hole 41, and threads can be arranged in the wall of the connecting hole 41 to be matched with the screw of the bolt body 01 according to actual requirements.

In the mounting process, firstly, the position of the second piece 04 is adjusted to the position that the connecting hole 41 is on the same straight line with the rotation preventing hole 31 and the threaded hole 33 of the first piece 03, and the connecting hole 41 is positioned between the rotation preventing hole 31 and the threaded hole 33; then the bolt body 01 sequentially passes through the anti-rotation hole 31 and the connecting hole 41 and is in threaded connection with the threaded hole 33 until the bolt body 01 is screwed to a target position; finally, the anti-rotation cap 02 is mounted on the bolt head 11 from the anti-rotation hole 31, and the anti-rotation convex strips 22 outside the anti-rotation cap 02 correspond to the anti-rotation grooves 311 in the mounting process. After the installation is completed, the rotation preventing cap 02 cannot rotate relative to the first member 03 and the second member 04 due to the restriction of the rotation preventing groove 311, and the bolt body 01 cannot rotate relative to the rotation preventing cap 02, so that the rotation preventing of the bolt is realized.

Embodiment III:

the battery box body in the embodiment of the application comprises a bolt connection structure in the second embodiment, and the bolt connection structure in the second embodiment is simple in structure, so that the battery box body is applicable to a lithium battery Pack production line and can be used for fixing a local structure of the battery box body in an installation mode compared with a common bolt by only installing an anti-rotation cap.

What has been described above is merely illustrative of the principles and preferred embodiments of the present application. It should be noted that, for a person skilled in the art, embodiments which are obtained by appropriately combining the technical solutions respectively disclosed in the different embodiments are also included in the technical scope of the present utility model, and that several other modifications are possible on the basis of the principles of the present application and should also be regarded as the protection scope of the present application.

Claims (10)

1. The anti-rotation bolt is characterized by comprising a bolt body provided with a bolt head and a screw rod, and an anti-rotation cap clamped on the bolt head;

the outer peripheral surface of the bolt head is provided with a limiting protrusion;

the anti-rotation cap is provided with an accommodating space, the inner peripheral wall of the accommodating space is provided with a limiting groove, when the anti-rotation cap is clamped on the bolt head, the bolt head is installed in the accommodating space, and the limiting protrusion is matched with the limiting groove;

the outer peripheral surface of the anti-rotation cap is also provided with an anti-rotation convex strip which is used for being installed in an anti-rotation groove of the connected piece, and the anti-rotation convex strip is arranged along the axial direction of the anti-rotation cap.

2. The anti-rotation bolt according to claim 1, wherein a clamping groove is formed in the bolt head and arranged along the circumferential direction, a clamping hook is arranged in the anti-rotation cap, and the clamping hook is installed in the clamping groove so that the anti-rotation cap is clamped with the bolt head.

3. The anti-rotation bolt according to claim 2, wherein at least two hooks are arranged in the anti-rotation cap, the hooks are circumferentially arranged on the inner peripheral wall of the accommodating space, and a gap is arranged between two adjacent hooks.

4. The anti-rotation bolt according to claim 2, wherein an annular flange is provided below the bolt head, the clamping groove being formed between the bolt head and the annular flange.

5. The anti-rotation bolt of claim 4, wherein the diameter of the annular flange is greater than the diameter of the bolt head.

6. The anti-rotation bolt according to claim 4, wherein the bolt head, the screw and the annular flange are integrally formed, and the bolt head has a hexagonal prism shape.

7. The anti-rotation bolt according to claim 6, wherein the anti-rotation cap is formed by injection molding of a plastic material, the accommodating space is in a hexagonal prism shape, and when the anti-rotation cap is clamped on the bolt head, the outer surface of the bolt head is tightly attached to the inner wall of the accommodating space.

8. A bolting arrangement comprising a first member, a second member and an anti-rotation bolt according to any one of claims 1 to 7, said first member being provided with an anti-rotation hole and a threaded hole, said second member being provided with a connection hole;

the screw rod of the bolt body passes through the anti-rotation hole and the connecting hole and then is in threaded connection with the threaded hole, the anti-rotation cap passes through the anti-rotation hole and is in clamping connection with the bolt head, an anti-rotation groove corresponding to the anti-rotation convex strip is formed in the anti-rotation hole, and the anti-rotation convex strip is installed in the corresponding anti-rotation groove.

9. The bolting configuration of claim 8, wherein said first member is riveted with a blind rivet nut, said threaded bore being formed in said blind rivet nut.

10. A battery case comprising the bolting structure according to claim 8 or 9.