Bolt pre-positioning structure, battery pack and vehicle

Abstract

The utility model relates to the technical field of batteries, in particular to a bolt pre-positioning structure, a battery pack and a vehicle, the bolt pre-positioning structure comprises a bolt body and a limiting piece, the bolt body comprises a screw rod and a bolt head, and one end, far away from the bolt head, of the screw rod can penetrate through a through hole of an external mechanism; the inner side wall of the limiting piece can be in threaded connection with the outer side wall of the screw, and the limiting piece is arranged on the side, opposite to the bolt head, of the external mechanism and used for preventing the end, away from the bolt head, of the screw from retreating from the through hole of the external mechanism. When the bolt pre-positioning structure is used for fixing an external mechanism, the inner side wall of the limiting piece can be in threaded connection with the outer side wall of the screw rod, the accident that the bolt retreats from a through hole of the external mechanism can be avoided, and therefore in the bolt screwing process, the manual hole alignment process in the installation process can be omitted, and the installation efficiency is improved. And the installation speed is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a bolt pre-positioning structure, a battery pack and a vehicle. Background Art

[0002] In recent years, as environmental and energy issues have become increasingly severe, companies and governments in many major economies around the world have paid more and more attention to the research and development and production of electric vehicles. The popularity of new energy electric vehicles has become more and more common, and battery packs are usually installed as an independent product on new energy electric vehicles.

[0003] However, the installation of the battery pack on the new energy electric vehicle requires accurate positioning and installation. The current commonly used method is manual installation of holes or visual positioning of equipment. During the installation process, the bolts and the battery pack must be aligned first and then the bolts are tightened to the vehicle. This will cause the bolts to be misaligned with the mounting holes on the battery pack or the bolts to fall off and need to be repeatedly aligned, resulting in a long installation time. Utility Model Content

[0004] The utility model provides a bolt pre-positioning structure, a battery pack and a vehicle, which are used to solve the problems in the prior art that the bolts and the mounting holes on the battery pack are not accurately aligned or the bolts fall off and need to be repeatedly aligned, resulting in a long installation time.

[0005] On the one hand, the utility model provides a bolt pre-positioning structure, comprising:

[0006] The bolt body comprises a screw rod and a bolt head, wherein an end of the screw rod away from the bolt head can pass through a through hole of the external mechanism;

[0007] The limiter, whose inner side wall can be threadedly connected with the outer side wall of the screw rod, is arranged on the side of the external mechanism opposite to the bolt head, and is used to prevent the end of the screw rod away from the bolt head from withdrawing from the through hole of the external mechanism.

[0008] In some specific embodiments, the bolt pre-positioning structure also includes a force transmission member, the inner side wall of the force transmission member can slide with the outer side wall of the screw rod, and a first limiting groove is opened on the side of the force transmission member close to the limiting member, and the first limiting groove is used to accommodate the limiting member.

[0009] In some specific embodiments, the limiting member is annular, and the first limiting groove is a cylindrical groove matching the limiting member.

[0010] In some specific embodiments, the thickness of the limiting member is not greater than the depth of the first limiting groove, and / or the outer diameter of the limiting member is not greater than the inner diameter of the first limiting groove.

[0011] In some specific embodiments,

[0012] The force transmission member is an elastic gasket;

[0013] And / or, the limiting member is a rigid gasket.

[0014] In some specific embodiments, an end of the screw rod away from the bolt head is tapered.

[0015] In some of the specific embodiments, the end surfaces of the force transmission member are respectively provided with concave and convex patterns.

[0016] On the other hand, the utility model further provides a battery pack, including a housing, and also including the bolt pre-positioning structure provided in any of the above-mentioned specific embodiments.

[0017] In some specific embodiments, a second limiting groove is formed on one side of the shell body close to the limiting member, and the second limiting groove is used to accommodate the limiting member.

[0018] On the other hand, the utility model also provides a vehicle, comprising the battery pack provided by any of the above-mentioned specific embodiments.

[0019] The beneficial effects of the utility model are as follows:

[0020] 1. The bolt pre-positioning structure of the utility model is provided with a stopper on the basis of an ordinary bolt, and the inner side wall of the stopper can be threadedly connected with the outer side wall of the screw rod. When the bolt is used to fix the external mechanism, the end of the screw rod away from the bolt head is passed through the through hole of the external mechanism, and then the stopper is sleeved on the screw rod, so that the stopper is arranged on the side of the external mechanism opposite to the bolt head. Since the stopper is threadedly connected with the screw rod, the stopper can prevent the end of the screw rod away from the bolt head from withdrawing from the through hole of the external mechanism. By pre-inserting the bolt into the through hole of the external mechanism, the accident of the bolt withdrawing from the through hole of the external mechanism can be avoided, so that in the process of tightening the bolt, the manual hole alignment process during the installation process can be omitted, and the installation speed can be effectively improved.

[0021] 2. The battery pack of the utility model can save the manual hole alignment process during installation, effectively improving the installation speed. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a bolt pre-positioning structure according to an embodiment of the utility model;

[0024] Figure 2 Another schematic diagram of a bolt pre-positioning structure according to an embodiment of the utility model;

[0025] Figure 3 is a schematic diagram of a battery pack according to an embodiment of the utility model;

[0026] Reference numerals:

[0027] 100-bolt body, 110-screw rod, 120-bolt head, 200-limiting member, 300-force transmission member, 400-first limiting groove, 500-second limiting groove, 600-housing. DETAILED DESCRIPTION

[0028] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] As mentioned in the background technology, the installation of the battery pack on the new energy electric vehicle requires accurate positioning and installation. The current commonly used method is manual installation of holes or visual positioning of equipment. During the installation process, the bolts and the battery pack must be aligned first and then the bolts are tightened to the vehicle. This will cause the bolts and the installation holes on the battery pack to be misaligned or require repeated alignment, resulting in a long installation time.

[0033] To improve the above problems, Figure 1-3 As shown, this embodiment provides a bolt pre-positioning structure, including a bolt body 100 and a stopper 200, wherein the bolt body 100 includes a screw rod 110 and a bolt head 120, and one end of the screw rod 110 away from the bolt head 120 can pass through the through hole of the external mechanism. The inner side wall of the stopper 200 can be threadedly connected with the outer side wall of the screw rod 110, and is arranged on the side of the external mechanism opposite to the bolt head 120, and is used to prevent the end of the screw rod 110 away from the bolt head 120 from withdrawing from the through hole of the external mechanism.

[0034] When the bolt is used to fix the external mechanism, after the end of the screw rod 110 away from the bolt head 120 passes through the through hole of the external mechanism, the stopper 200 is sleeved on the screw rod 110, so that the stopper 200 is arranged on the side of the external mechanism opposite to the bolt head 120. Since the stopper 200 and the screw rod 110 are threadedly connected, the stopper 200 can prevent the end of the screw rod 110 away from the bolt head 120 from exiting from the through hole of the external mechanism. By pre-inserting the bolt in the through hole of the external mechanism, the step of manually aligning the hole at the installation site can be omitted, and the accident of the screw rod 110 exiting from the through hole of the external mechanism can be avoided, thereby effectively improving the installation efficiency of the bolt body 100.

[0035] Specifically, if Figure 1As shown, a threaded hole is provided on the stopper 200, and the outer wall of the screw rod 110 can be threadedly matched with the inner wall of the threaded hole. The outer diameter of the stopper 200 is larger than the inner diameter of the through hole of the external mechanism, so that the stopper 200 can be blocked on one side of the through hole of the external mechanism, and because the stopper 200 is threadedly connected to the screw rod 110, the screw rod 110 can be prevented from withdrawing from the through hole of the external mechanism. The diameter of the bolt head 120 is larger than the inner diameter of the through hole of the external mechanism, so that the bolt head 120 can fully contact the external mechanism to ensure the installation torque.

[0036] It should be noted that the above-mentioned "external mechanism" refers to the mechanism to be fixed. Specifically, for the battery pack, it refers to the outer shell of the battery pack, which has a through hole through which the bolt can pass, and the stopper 200 can be threadedly connected to the screw 110 to prevent the screw 110 from withdrawing from the through hole.

[0037] like Figure 2 As shown, in the technical solution of this embodiment, the bolt pre-positioning structure also includes a force transmission member 300, the inner side wall of the force transmission member 300 can slide with the outer side wall of the screw rod 110 body, and the force transmission member 300 is provided with a first limiting groove 400 on the side close to the limiting member 200, and the first limiting groove 400 is used to accommodate the limiting member 200. By providing the force transmission member 300, the force transmission member 300 serves as a connecting member between the battery pack housing 600 and the vehicle body structure, and the two sides of the force transmission member 300 are respectively in contact with the battery pack housing 600 and the vehicle body structure to bear force, so that after the battery pack housing 600 is fixed, the battery pack housing 600, the bolt body 100 and the force transmission member 300 are rigidly connected, thereby ensuring the stability of the battery pack housing 600 fixed on the vehicle. At the same time, a limiting groove is opened on the force transmission member 300, so that the limiting member 200 can be accommodated in the limiting groove after tightening the bolt body 100. The limiting member 200 does not need to be removed. At the same time, the limiting member 200 does not affect the rigid connection between the battery pack shell 600, the bolt body 100 and the force transmission member 300.

[0038] like Figure 2 As shown, in the technical solution of this embodiment, the limiting member 200 is annular, and the first limiting groove 400 is a cylindrical groove matching the limiting member 200. By designing the limiting member 200 to be annular and the first limiting groove 400 to be a cylindrical groove matching the limiting member 200, the limiting member 200 can rotate in the limiting groove.

[0039] It should be noted that, during the tightening process of the bolt body 100, when the friction force between the battery pack shell 600 and the force transmission member 300 on the limit member 200 is not large enough, the limit member 200 rotates together with the screw 110. At this time, there is basically no relative rotation between the limit member 200 and the screw 110. The limit member 200 and the force transmission member 300 may rotate relative to each other or the limit member 200 and the force transmission member 300 may rotate together. However, continuous high-speed rotation of the force transmission member 300 may cause damage to the battery pack shell 600. Therefore, the first limit groove 400 is designed to be a cylindrical groove matching the limit member 200, which allows the limit member 200 to rotate in the limit groove, thereby reducing or avoiding continuous high-speed rotation of the force transmission member 300. When the bolt body 100 is tightened to a certain degree, the pressure between the battery pack shell 600 and the force transmission member 300 on the limit member 200 gradually increases, and the friction between the battery pack shell 600, the force transmission member 300 and the limit member 200 increases accordingly, which is sufficient to overcome the rotational force when the screw 110 drives the limit member 200 to rotate. At this time, the limit member 200 and the force transmission member 300 remain relatively still, and relative rotation will occur between the limit member 200 and the screw 110, so that the battery pack shell 600 is completely fixed on the vehicle body structure.

[0040] like Figure 2 As shown, in the technical solution of this embodiment, the thickness of the limiter 200 is not greater than the depth of the first limiter groove 400, and / or the outer diameter of the limiter 200 is not greater than the inner diameter of the first limiter groove 400. Preferably, the thickness of the limiter 200 is equal to the depth of the first limiter groove 400, and the outer diameter of the limiter 200 is equal to the inner diameter of the first limiter groove 400, so that after the bolt body 100 is installed, the lower end surface of the limiter 200 will not protrude outside the limiter groove, so that the lower end surface of the force transmission member 300 can contact the battery pack shell 600, so that the two sides of the force transmission member 300 are respectively in contact with the battery pack shell 600 and the vehicle body structure to receive force, so that after the battery pack shell 600 is fixed, the battery pack shell 600, the bolt body 100 and the force transmission member 300 are rigidly connected to ensure the stability of the battery pack shell 600 fixed on the vehicle.

[0041] like Figure 2As shown, in the technical solution of this embodiment, the limit member 200 is an elastic gasket, and / or the force transmission member 300 is a rigid gasket. As a preferred embodiment, the limit member 200 in this embodiment adopts a gasket made of plastic or rubber material. Compared with metal alloys, plastic or rubber has a micro-deformation characteristic, that is, it can produce a small deformation. During the installation process, it can adapt to the bolt body 100 through its own deformation, and will not cause stress wear to the bolt body 100. In addition, the production cost of plastic or rubber gaskets is low. The force transmission member 300 adopts a steel gasket. The steel gasket has a high strength and is not easy to deform. It can form a rigid connection between the battery pack shell 600 and the vehicle body structure to ensure that the battery pack shell 600 is firmly installed on the vehicle body structure.

[0042] It should be noted that since the screw 110 is threadedly connected to the stopper 200 and the vehicle body structure at the same time, during the installation process, the screw 110 and the stopper 200 may not be coaxial, that is, the stopper 200 and the screw 110 may be misaligned. If the stopper 200 is a hard rigid gasket, after the installation is completed, the stopper 200 will cause a certain torque to the screw 110, which will increase the probability of the screw 110 breaking. After the stopper 200 is designed as a soft elastic gasket, the stopper 200 has a micro-deformation characteristic and can adapt to the screw 110 through its own deformation, so that there will be no torque on the screw 110, making the bolt 100 more secure after installation.

[0043] certainly, Figure 3 The force transmission member 300 in the embodiment is located above the limiting member 200. In other embodiments, the force transmission member 300 may also be located below the limiting member 200, that is, the opening of the first limiting groove 400 of the force transmission member 300 faces upward. After installation, the limiting member 200 is disposed in the first limiting groove 400. Those skilled in the art can flexibly choose to place the force transmission member 300 below or above the limiting member 200 according to actual needs.

[0044] By placing the limit member 200 in the first limit groove 400, on the one hand, there is no need to remove the limit member 200 after installation, and the limit member 200 can be hidden in the first limit groove 400 of the force transmission member 300; on the other hand, even if the limit member 200 wears off and falls off, the worn and fallen limit member 200 is pressed into the first limit groove 400, which can prevent the structural connection from loosening due to the vacant position after the limit member 200 falls off.

[0045] In some specific embodiments, the end of the screw 110 away from the bolt head 120 is tapered, so that during the process of tightening the bolt 100, the tail end of the screw 110 can automatically find the hole. For example, when installing the battery pack, the end of the screw 110 away from the bolt head 120 is tapered. Therefore, during the tightening process, the screw 110 can automatically align with the mounting hole on the vehicle and perform automatic calibration to ensure that the mounting hole on the vehicle, the mounting hole on the battery pack housing 600 and the screw remain coaxial, thereby reducing the torque on the screw 110.

[0046] In some specific embodiments, the end faces of the force transmission member 300 are respectively provided with concave and convex patterns, which can increase the friction between the force transmission member 300 and the battery pack shell 600 and the vehicle mounting structure, and improve the stability of the force transmission member 300 between the battery pack shell 600 and the vehicle mounting structure.

[0047] On the other hand, the utility model further provides a battery pack, including a housing 600, and also including the bolt pre-positioning structure provided in any of the above-mentioned specific embodiments.

[0048] like Figure 3 As shown, in some specific embodiments, a second limiting groove 500 is provided on one side of the housing 600 close to the limiting member 200, and the second limiting groove 500 is used to accommodate the limiting member 200. In this case, the first limiting groove 400 may or may not be provided on the force transmission member 300. After installation, the limiting member 200 can be hidden in the second limiting groove 500.

[0049] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0050] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A bolt pre-positioning structure, characterized in that: include: The bolt body comprises a screw rod and a bolt head, wherein an end of the screw rod away from the bolt head can pass through a through hole of an external mechanism; A limiter, the inner side wall of which can be threadedly connected to the outer side wall of the screw rod, is arranged on the side of the external mechanism opposite to the bolt head, and is used to prevent the end of the screw rod away from the bolt head from withdrawing from the through hole of the external mechanism.

2. The bolt pre-positioning structure according to claim 1, characterized in that: It also includes a force transmission member, the inner side wall of which can slide with the outer side wall of the screw rod, and a first limiting groove is formed on a side of the force transmission member close to the limiting member, and the first limiting groove is used to accommodate the limiting member.

3. The bolt pre-positioning structure according to claim 2, characterized in that: The limiting member is annular in shape, and the first limiting groove is a cylindrical groove matching the limiting member.

4. The bolt pre-positioning structure according to claim 3, characterized in that: The thickness of the limiting member is not greater than the depth of the first limiting groove, and / or the outer diameter of the limiting member is not greater than the inner diameter of the first limiting groove.

5. The bolt pre-positioning structure according to any one of claims 2 to 4, characterized in that: The force transmission member is an elastic gasket; And / or, the limiting member is a rigid gasket.

6. The bolt pre-positioning structure according to claim 5, characterized in that: One end of the screw rod away from the bolt head is tapered.

7. The bolt pre-positioning structure according to claim 5, characterized in that: The end faces of the force transmission member are respectively provided with concave and convex patterns.

8. A battery pack, comprising a housing, characterized in that: It also includes the bolt pre-positioning structure according to any one of claims 1 to 7.

9. The battery pack according to claim 8, characterized in that: A second limiting groove is formed on one side of the shell body close to the limiting member, and the second limiting groove is used to accommodate the limiting member.

10. A vehicle, characterized in that: A battery pack comprising any one of claims 8 to 9.

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