Self-locking bolt structure, battery pack and electric device

Abstract

The utility model discloses a kind of self-locking bolt structure, battery pack and electrical equipment.The self-locking bolt structure includes locking mechanism, the locking mechanism includes limiting portion and connecting portion, the limiting portion is connected with the first mounting member for setting the self-locking bolt structure by the connecting portion, the limiting portion can be bent to lock bolt installed in the first mounting member, wherein, the first mounting member is provided with the first mounting hole for assembling the first mounting member with other components by the bolt.The battery pack includes battery pack box and battery pack upper cover, battery pack upper cover is fixedly connected with battery pack box by self-locking bolt structure, wherein, the self-locking bolt structure is the self-locking bolt structure described above, the battery pack upper cover includes the first mounting member.The electrical equipment includes the battery pack described above.Self-locking bolt structure, battery pack and electrical equipment all have the advantage of preventing bolt loosening.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, and in particular to a self-locking bolt structure, a battery pack, and an electrical device. Background Technology

[0002] Before being put into use, battery packs require rigorous testing, including crucial vibration testing. During vibration testing, the locking bolts used in the battery pack often loosen or fall off, leading to a loss of torque and affecting the accuracy of the test results. To avoid the influence of materials or structures outside the verification process on the test, and to reduce the impact of loose bolts on the test results, it is urgent to design a test battery pack that prevents bolt loosening, thereby improving the accuracy of the battery pack test results.

[0003] In addition, during use, the bolts on battery packs and other devices that are fastened by bolts are also prone to loosening or falling off, which affects the reliability of the devices. Utility Model Content

[0004] Therefore, this utility model provides a self-locking bolt structure, a battery pack, and an electrical device in an attempt to solve or at least alleviate at least one of the above-mentioned problems.

[0005] According to one aspect of the present invention, a self-locking bolt structure is provided, the self-locking bolt structure including a locking mechanism, wherein the locking mechanism includes a limiting part and a connecting part, the limiting part being connected to a first mounting member for setting the self-locking bolt structure via the connecting part, the limiting part being bendable to lock a bolt mounted on the first mounting member, wherein the first mounting member is provided with a first mounting hole for assembling the first mounting member with other components via the bolt.

[0006] Optionally, in this self-locking bolt structure, the locking mechanism further includes a washer portion connected to the side of the limiting portion opposite to the connecting portion. The washer portion is provided with a second through hole, which corresponds to the position of the first mounting hole after the limiting portion is bent, so that the bolt passes through the second through hole and the first mounting hole.

[0007] Optionally, the bolt head or nut has at least one side face perpendicular to the plane where the first mounting hole is located, and the bent side face of the limiting portion abuts against at least one of the side faces of the bolt head or the nut. By providing at least one side face perpendicular to the plane where the first mounting hole is located, it is beneficial to ensure a more sufficient abutment between the locking mechanism and the bolt head or nut, thereby achieving a more reliable locking.

[0008] Optionally, the bolt head or the nut of the bolt is hexagonal. Using a hexagonal structure helps ensure a more sufficient contact between the locking mechanism and the bolt head or nut, thereby achieving a more reliable locking mechanism.

[0009] Optionally, the locking mechanism and the first mounting component are integrally formed. This integral forming structure helps ensure the reliability of the connection between the locking mechanism and the first mounting component.

[0010] Optionally, the connecting portion is welded to the first mounting member. By welding the connecting portion to the first mounting member, the first mounting member and the locking mechanism can be manufactured separately, facilitating the adaptation of the locking mechanism to different first mounting components.

[0011] Optionally, the limiting portion includes at least one pair of parallel, bendable metal strips. Using parallel, bendable metal strips makes it easier to adjust the shape and position of the limiting portion.

[0012] Optionally, the self-locking bolt structure further includes a bolt connector, wherein the bolt connector includes the bolt and a threaded hole that matches the bolt or a nut that matches the bolt.

[0013] Another aspect of this utility model provides a battery pack, including a battery pack housing and a battery pack cover, wherein the battery pack cover is fixedly connected to the battery pack housing by a self-locking bolt structure, wherein the self-locking bolt structure is as described in any of the above claims, and the battery pack cover includes the first mounting member.

[0014] Another aspect of this utility model provides an electrical device that includes the battery pack described above.

[0015] According to the self-locking bolt structure of this utility model, since it includes a locking mechanism, it can lock the fastened bolts in place, preventing them from loosening or falling off. According to the battery pack of this utility model, since the battery pack body and the battery pack cover are connected by this self-locking bolt structure, it can be ensured that the fastening bolts of the battery pack cover will not loosen or fall off during testing, especially vibration testing. This avoids the influence of materials or structures other than bolt loosening on the test, improving the accuracy of the test results, and also prevents the fastening bolts from loosening or falling off during the use of the battery pack. The electrical equipment of this utility model, using this battery pack, also has the aforementioned advantages. Attached Figure Description

[0016] To achieve the foregoing and related objectives, certain illustrative aspects are described herein in conjunction with the following description and accompanying drawings. These aspects indicate various ways in which the principles disclosed herein may be practiced, and all aspects and their equivalents are intended to fall within the scope of the claimed subject matter. The foregoing and other objectives, features, and advantages of this disclosure will become more apparent from the following detailed description, taken in conjunction with the accompanying drawings. Throughout this disclosure, the same reference numerals generally refer to the same parts or elements.

[0017] Figure 1 This is a schematic diagram of a self-locking bolt structure 100 according to an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of another structure of the self-locking bolt structure 100 according to an embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the locking mechanism 120 of the self-locking bolt structure 100 according to an embodiment of the present utility model;

[0020] Figure 4 This is another schematic diagram of the locking mechanism 120 of the self-locking bolt structure 100 according to an embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the structure of a battery pack 300 according to an embodiment of the present invention.

[0022] Figure label:

[0023] 100. Self-locking bolt structure; 110. Bolt connector; 120. Locking mechanism; 121. Limiting part; 122. Connecting part; 123. Gasket part; 1231. Second through hole; 111. Bolt; 200. First mounting part; 210. First mounting hole; 300. Test battery pack; 310. Battery pack cover; 320. Battery pack housing. Detailed Implementation

[0024] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0025] This utility model discloses a self-locking bolt structure, a battery pack using this structure, and an electrical device using this battery pack. The following will be combined with... Figure 1-5 Please provide a detailed explanation.

[0026] First, let's introduce the structure of the self-locking bolt. For example... Figure 1 As shown, a self-locking bolt structure 100 according to an embodiment of the present invention includes a bolt connector 110 and a locking mechanism 120. The bolt connector 110 is typically composed of a bolt 111 and a threaded hole (not shown in the figure) matching the bolt 111, or a bolt 111 and a nut (not shown in the figure) matching the bolt 111. The locking mechanism 120 includes a limiting part 121 and a connecting part 122, and is typically a sheet metal structural part formed by stamping and cutting metal sheets. Figure 2 As shown, the locking structure 120 is connected to the first mounting member 200 via the connecting part 122. According to one embodiment of the present invention, the locking mechanism 120 and the first mounting member 200 are connected by welding or stamping. The first mounting member 200 is a component fixedly connected by the self-locking bolt structure 100. Typically, the first mounting member 200 has a first mounting hole 210 for mounting bolts 111. The locking mechanism 120 is typically connected near the first mounting hole 210 (see...). Figure 2 The limiting part 121, after being bent, can lock the bolt head of the bolt 111 installed on the first mounting member 200. One feasible implementation is that a locking mechanism includes two opposing limiting parts 121, each of which abuts against the bolt head after bending, thereby jointly locking the bolt head. Therefore, after the bolt connector 110 is installed on the first mounting member 200, the limiting part 121 can be bent to lock the bolt head of the bolt 111, thereby preventing the bolt connector 110 from loosening or falling off due to vibration or other reasons. Furthermore, the limiting part 121 can be bent multiple times. By bending the limiting part 121, the bolt 111 can be locked to prevent it from loosening or falling off, and it can also be bent again to unlock the bolt 111, thereby opening the first mounting member 200 and other mounting members connected to it, and performing other adjustment operations. This structural adjustment can be completed by bending, making the operation simple.

[0027] It should be noted that the limiting part 121 can be used not only to lock the bolt head of the bolt 111, but also to lock the nut if the locking mechanism 120 is a combination of bolt 111 and nut. In the following embodiment, the bolt head of the bolt is locked by the limiting part 121 as an example of a combination of bolt 111 and threaded hole that is adapted to the locking mechanism 120.

[0028] like Figure 1 and Figure 3 As shown, according to one embodiment of the present invention, the locking mechanism 120 includes a limiting part 121 and a connecting part 122, as well as a gasket part 123. Figure 3As shown, the gasket portion 123 is connected to the side of the limiting portion 121 opposite to the connecting portion 122. A second through hole 1231 is provided on the gasket portion 123. Before the bolt connector 110 is installed, the limiting portion 121 is folded over to make the second through hole 1231 overlap and align with the first mounting hole 210 (see...). Figure 4 Then, the bolt connector 110 is installed, so that the washer portion is also fixed by the bolt 111. This fixes both the connecting portion 122 and the washer portion 123 at both ends of the limiting portion 121, enhancing the fixing strength of the limiting portion 121 to the bolt head after bending deformation, and further eliminating the risk of the bolt 111 loosening or falling off. Furthermore, the washer portion 123 also acts as a bolt washer. When the bolt 111 is tightened, it increases the contact area, reduces the pressure of the bolt head on the first mounting part, reduces local stress concentration, and avoids deformation or crushing of the part. In addition, the washer portion 123 can also play a certain role in preventing loosening of the bolt connector.

[0029] Back Figure 1 To facilitate the fixing of the bolt head or nut by the limiting part 121, the bolt head or nut typically has at least one side surface perpendicular to the plane where the first mounting hole is located. The side surface of the limiting part 121, after being bent, is parallel and fits against the side surface of the bolt head. In a specific example, the bolt head or nut can be set as an external hexagon, and the side surface of the limiting part 121 is at least fitted against one side surface of the hexagonal bolt head to prevent the bolt head from turning over, loosening, or even falling off.

[0030] In this embodiment of the invention, the limiting part can be metal, alloy, or other materials that can be bent and maintain a bent state. For example... Figure 3 As shown, according to one embodiment of the present invention, the limiting part 121 is two parallel, bendable metal strips formed by stamping or shearing. After folding, they fit against the two opposite side surfaces of the bolt head or nut. In other examples, the limiting part 121 can also lock the bolt head in other ways. The installation process for a specific example where the bolt connector 110 is an external hexagonal bolt and a matching threaded hole is as follows:

[0031] Using tools or wearing gloves, bend the limiting part 121 of the locking structure 120 by hand, so that the gasket part 123 rotates along the connecting part 122 until the second through hole 1231 and the first mounting hole 210 overlap (see...). Figure 4Then, the bolt 111 is passed through the washer portion 123 and the first mounting hole 210 and inserted into the mounting hole of another mounting component connected to the first mounting component 200. The bolt torque is increased to the design range by using a torque wrench and connecting sleeve, ensuring that there is no stripping or other issues. The angle of the external hex bolt 111 is adjusted appropriately so that its side face is parallel to the side face of the limiting portion 121. The torque wrench is removed, and the first mounting component 200 is pressed down with a tool. The limiting portion 121 is bent and pressed down by hand with a tool or while wearing gloves, so that the side face of the limiting portion 121 after bending and deformation is tightly pressed against the side face of the external hex bolt.

[0032] The self-locking bolt structure of this invention can lock the bolt in place, preventing it from loosening or falling off. It is primarily used in product vibration testing, where the self-locking bolt structure prevents loosening during vibration testing. Of course, besides vibration testing, it can also be used in any other application scenario with a risk of loosening.

[0033] like Figure 5 As shown, one embodiment of this utility model also discloses a test battery pack 300, including a battery pack housing 320 and a battery pack cover 310. The battery pack housing and the cover are fixedly connected by the aforementioned bolt self-locking structure 100. The bolt self-locking structure 100 can lock the tightened bolts, preventing the bolts from loosening or falling off during vibration testing and affecting the test results, thus ensuring the accuracy of the battery pack vibration test results.

[0034] The bolt self-locking mechanism 100 includes a locking mechanism 120 and a bolt connector connected to the battery pack cover 310 (equivalent to the first mounting component mentioned above). The locking mechanism 120 includes a limiting part 121 and a connecting part 122. The locking mechanism 120 is typically a sheet metal structural component formed by stamping and cutting metal sheets. The limiting part 121 is connected to the battery pack cover 320 via the connecting part 122. According to one embodiment of this utility model, the locking mechanism 120 is connected to the test battery pack by stamping; in other examples, it can also be connected by welding, or by other fixed connection methods. The test battery pack cover 320 is provided with a first mounting hole 210 for mounting bolts 111. The limiting part 121 is typically connected to the edge of the battery pack cover 310 near the first mounting hole 210, such as... Figure 5As shown, the bolt head of bolt 111 is locked by the bending limiting part 121, which effectively prevents the bolt from loosening or falling off during the vibration test of the test battery pack 300. This significantly reduces the risk of bolt loosening during the test, which could lead to loss of torque and affect the experimental results, making the test results more accurate and avoiding the possibility of safety hazards caused by bolt falling off. Furthermore, the limiting part 121 can be bent multiple times. The limiting part 121 can lock the bolt when tightening to prevent it from loosening or falling off, and can also be bent again to unlock the bolt. This convenient operation enhances the operability of the test experiment.

[0035] Furthermore, the locking structure 120 also includes a washer portion 123, which is connected to the side of the limiting portion 121 opposite to the connecting portion 122. The washer portion 123 has a second through hole 1231. Before the bolt connector 110 is installed, the limiting portion is bent to make the second through hole 1231 overlap and align with the first mounting hole 210 of the battery pack cover. Then, the bolt 111 is installed to fix the washer portion 123, thereby fixing both the connecting portion 122 and the washer portion 123 at both ends of the limiting portion 121. This enhances the fixing strength of the limiting portion 121 to the bolt head after bending deformation, further reducing the risk of the bolt 111 loosening or falling off. Moreover, the washer portion 123 also functions as a bolt washer, increasing the contact area when the bolt 111 is tightened, reducing the pressure of the bolt head on the battery pack cover, reducing local stress concentration, and preventing component deformation or crushing.

[0036] To facilitate the fixing of the bolt 111 by the limiting part 121, the bolt head typically has at least one side surface perpendicular to the plane where the first mounting hole is located. The side surface of the limiting part, after being bent, is parallel and fits against the side surface of the bolt head or nut, thereby preventing the bolt head from rotating in the opposite direction and loosening. In a specific example, the bolt head may be hexagonal, and the side surface of the limiting part 121 is at least fitted against one side surface of the hexagonal bolt head to prevent the bolt head from rotating in the opposite direction, loosening, or even falling off. Figure 5 As shown, according to one embodiment of the present invention, the limiting part 121 consists of two parallel, bendable metal strips. After bending, they conform to the two opposite side surfaces of the bolt head. In other examples, the limiting part 121 can also lock the bolt head in other ways. In one specific example, the bolt head is hexagonal. After bending, the limiting part 121 conforms to the two opposite side surfaces of the bolt head or nut.

[0037] According to the test battery pack of this embodiment, the battery pack cover 310 and the battery pack housing 320 are connected by a self-locking bolt structure to ensure that the fastening bolts of the battery pack cover will not loosen or fall off during the test, especially during vibration testing. This significantly reduces the risk of bolts loosening during the experiment, which could lead to loss of torque and affect the experimental results. It also avoids the influence of materials or structures outside the verification project on the test, improves the accuracy of the test results, and avoids the safety hazards caused by bolt detachment. The test battery pack according to this embodiment can also be used as a regular battery pack. Due to its self-locking bolt structure, the fastening bolts of the battery pack cover are less likely to loosen or fall off during use.

[0038] According to another aspect of this utility model, an electrical device is provided, including the aforementioned battery pack. Therefore, this electrical device possesses all the features and advantages of the aforementioned battery pack, which will not be repeated here.

[0039] The aforementioned battery pack can be used as a power source for the electrical device, or as an energy storage unit for the electrical device. The electrical device may include, but is not limited to, mobile devices (such as mobile phones, tablets, laptops, etc.), electric vehicles (such as pure electric vehicles, hybrid electric vehicles, plug-in hybrid electric vehicles, electric bicycles, electric scooters, electric trucks, electric forklifts, etc.), ships, energy storage systems, etc.

[0040] In the description of the embodiments of this utility model, it should be understood that the terms "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the 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.

[0041] It should be understood that expressions such as "comprising" and "may include" used in this invention indicate the presence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this invention, terms such as "comprising" and / or "having" are to be interpreted as indicating a particular characteristic, number, operation, constituent element, component, or combination thereof, but not to exclude the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0042] In this embodiment of the invention, expressions including ordinal numbers such as "first" and "second" may modify the elements. However, such elements are not limited by the above expressions. For example, the above expressions do not limit the order and / or importance of the elements. The above expressions are only used to distinguish one element from other elements.

[0043] In this embodiment of the invention, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design described as "exemplary" or "for example" in this embodiment of the invention should not be construed as being more preferred or advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0044] In the description of the embodiments of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0045] In the description of the embodiments of this utility model, when a component is referred to as "connected" or "accessed" to other components, it should be understood that the component is not only directly connected to or accessed to other components, but also that another component may exist between the component and other components. On the other hand, when a component is referred to as "directly connected" or "directly accessed" to other components, it should be understood that there is no component between them. When a component is referred to as "actively connected" to other components, it means that the positional relationship between the component and other components is variable, such as the relationship between a slide rail and a slider, where the slider can slide on the slide rail, and the slide rail and the track are actively connected. When a component is referred to as "fixedly connected" to other components, it means that the positional relationship between the component and other components after assembly is relatively fixed.

[0046] Furthermore, those skilled in the art will understand that although some embodiments described herein include certain features included in other embodiments but not others, combinations of features from different embodiments are meant to be within the scope of this invention and form different embodiments.

[0047] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Although this utility model has been described with reference to a limited number of embodiments, those skilled in the art will understand from the above description that other embodiments can be conceived within the scope of this utility model described herein. Furthermore, it should be noted that the language used in this specification has been chosen primarily for readability and instructional purposes, and not for interpreting or limiting the subject matter of this utility model. Therefore, many modifications and alterations will be apparent to those skilled in the art without departing from the scope and spirit of the appended claims. Regarding the scope of this utility model, the disclosure made herein is illustrative and not restrictive, and the protection scope of this patent application shall be determined by the scope of the claims.

Claims

1. A self-locking bolt structure, characterized in that, The self-locking bolt structure includes a locking mechanism, wherein the locking mechanism includes a limiting part and a connecting part, the limiting part is connected to a first mounting member for setting the self-locking bolt structure through the connecting part, the limiting part can be bent to lock the bolt installed on the first mounting member, wherein the first mounting member is provided with a first mounting hole for installing the bolt.

2. The self-locking bolt structure as described in claim 1, characterized in that, The locking mechanism further includes a washer portion connected to the side of the limiting portion opposite to the connecting portion. The washer portion is provided with a second through hole, which corresponds to the position of the first mounting hole after the limiting portion is bent, so that the bolt passes through the second through hole and the first mounting hole.

3. The self-locking bolt structure as described in claim 1, characterized in that, The bolt head or nut of the bolt is provided with at least one side face perpendicular to the plane where the first mounting hole is located, and the side face of the limiting part after bending abuts against at least one of the side faces of the bolt head or the nut.

4. The self-locking bolt structure as described in claim 3, characterized in that, The bolt head or the nut of the bolt is hexagonal in shape.

5. The self-locking bolt structure as described in claim 1, characterized in that, The locking mechanism and the first mounting component are integrally formed.

6. The self-locking bolt structure as described in any one of claims 1 to 5, characterized in that, The connecting part is connected to the first mounting component by welding.

7. The self-locking bolt structure as described in any one of claims 1 to 5, characterized in that, The limiting part includes at least one pair of parallel, bendable metal strips.

8. The self-locking bolt structure as described in any one of claims 1 to 5, characterized in that, The self-locking bolt structure also includes a bolt connector, wherein the bolt connector includes the bolt and a threaded hole that matches the bolt or a nut that matches the bolt.

9. A battery pack, characterized in that, The battery pack includes a battery pack housing and a battery pack cover. The battery pack cover is fixedly connected to the battery pack housing via a self-locking bolt structure, wherein the self-locking bolt structure is the self-locking bolt structure according to any one of claims 1 to 8, and the battery pack cover includes the first mounting member.

10. An electrical appliance, characterized in that, Includes the battery pack as described in claim 9.

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