Anti-falling device, battery pack and electric automobile

Abstract

The anti-falling device comprises a guide rod, a shaft sleeve, a retainer and a connecting piece, one side, in the Z direction, of the guide rod is fixedly connected with first external equipment, the shaft sleeve is limited in second external equipment and arranged on the periphery of the end, away from the first external equipment, of the guide rod in a sleeving mode, and the retainer is fixedly connected with the second external equipment; a limiting groove is formed in the side wall of the guide rod, a first through hole is formed in the side wall of the shaft sleeve, the retainer penetrates through the first through hole to be clamped in the limiting groove, and the connecting piece is arranged on the side, away from the first external device in the Z direction, of the second external device and connected with the second external device so that the shaft sleeve can be limited in the second external device. According to the scheme, when connection between the connecting piece and the second external equipment is broken or disengaged, the retainer can be clamped in the limiting groove and does not generate displacement, the shaft sleeve is prevented from moving in the direction away from the first external equipment, and therefore the second external equipment is prevented from being disengaged from the first external equipment.

Description

Technical Field

[0001] The present application relates to the field of battery safety technology, and in particular to an anti-falling device, a battery pack and an electric vehicle. Background Art

[0002] With the development of new energy technologies, electric vehicles have become one of the important directions of automobile development. In existing electric vehicle technical solutions, the battery pack is usually installed on the bottom of the vehicle body to facilitate the maintenance and disassembly of the battery pack in the electric vehicle.

[0003] In the existing technology, the connection between the battery pack and the frame of the electric vehicle is usually achieved by bolt connection technology. During the driving of the vehicle, the bolts can easily become loose or break due to factors such as vibration, causing the battery pack to detach during driving, thus posing a safety hazard. Utility Model Content

[0004] This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a new anti-dropout device, battery pack, and electric vehicle to solve the technical problem existing in the prior art that the battery pack is prone to detachment during driving.

[0005] In a first aspect, the present application provides an anti-falling device, comprising:

[0006] A guide rod 100 is fixedly connected to the first external device 500 on one side along the Z direction, and a limiting groove 110 is provided on the side wall of the guide rod 100;

[0007] A sleeve 200 is defined within the second external device 600 and is sleeved around the outer periphery of the guide rod 100 at an end away from the first external device 500, with a gap between the sleeve 200 and the first external device 500. A first through hole 210 is defined in a sidewall of the sleeve 200, and an extension direction of the first through hole 210 forms an angle with a radial direction of the sleeve 200.

[0008] A stopper 300 passes through the first through hole 210 and is fixed in the limiting groove 110 , and the stopper 300 can reciprocate along the first through hole 210 within a preset range;

[0009] The connecting member 400 is disposed on a side of the second external device 600 away from the first external device 500 along the Z direction and is connected to the second external device 600 to confine the shaft sleeve 200 in the second external device 600 .

[0010] Through the embodiment of the present application, when the connection between the connecting member 400 and the second external device 600 is broken or detached, the stop member 300 can be stuck in the limiting groove 110 without displacement and prevent the sleeve 200 from moving away from the first external device 500, thereby preventing the second external device 600 from detaching from the first external device 500.

[0011] In one technical solution of the above-mentioned anti-falling device, the limiting groove 110 includes a first groove body 111 and a second groove body 112 which are interconnected and extend in different directions, and a recess 113 provided at the bottom of the second groove body 112;

[0012] The extending direction of the recess 113 is the same as the extending direction of the first through hole 210 , and the stopper 300 passes through the first through hole 210 and is locked in the recess 113 .

[0013] In an embodiment of the present application, the limiting groove 110 is configured to include a first groove body 111 and a second groove body 112 that are interconnected and extend in different directions, so that the stop member 300 is not easily removed from the limiting groove 110 after being assembled into the limiting groove 110; further, a recess 113 is provided at the bottom of the second groove body 112 for the stop member 300 to be inserted into, so that the stop member 300 can be further confined in the limiting groove 110.

[0014] In one technical solution of the above-mentioned anti-falling device, the limiting groove 110 also includes a notch 114 arranged at one end of the first groove body 111 away from the second groove body 112. When the sleeve 200 is assembled to the guide rod 100, one end of the stop member 300 passed through the first through hole 210 can enter the first groove body 111 and the second groove body 112 in turn through the notch 114 and then be clamped in the recess 113.

[0015] In the embodiment of the present application, a notch 114 is provided on the limiting groove 110 so that the stopper 300 which is disposed in the first through hole 210 can be assembled into the recess 113 .

[0016] In one technical solution of the above-mentioned anti-falling device, the extension direction of part of the second trough body 112 is set at an angle to the extension direction of the first trough body 111, and the extension direction of part of the second trough body 112 is parallel to the extension direction of the first trough body 111.

[0017] In an embodiment of the present application, the extension direction of a portion of the second groove body 112 is set to form an angle with the extension direction of the first groove body 111, and the extension direction of a portion of the second groove body 112 is set to be parallel to the extension direction of the first groove body 111, so that the stop member 300 assembled in the limit groove 100 is not easy to fall off from the limit groove 100.

[0018] In one technical solution of the above-mentioned anti-falling device, the stopper 300 includes a first section 310 and a second section 320 connected to each other;

[0019] Along the length direction of the stopper 300 , the cross-sectional area of ​​the second section 320 is larger than the cross-sectional area of ​​the first section 310 ;

[0020] The first through hole 210 includes at least a first part 211 and a second part 212 that are interconnected, the first section 310 is located in the first part 211, and the second section 320 is located in the second part 212. The aperture of the first part 211 is smaller than the cross-sectional area of ​​the second section 320 along the length direction of the stop member 300 to prevent the second section 320 from moving along the first through hole 210 toward the outside of the sleeve 200.

[0021] In an embodiment of the present application, the cross-sectional area of ​​the second section 320 of the stop member 300 along the length direction of the stop member 300 is set to be larger than the aperture of the first part 211 of the first through hole 210, so as to prevent the second section 320 from moving along the first through hole 210 toward the outside of the sleeve 200 and prevent the stop member 300 from falling off from the first through hole 210.

[0022] In one technical solution of the above-mentioned anti-falling device, the sleeve 200 is provided with bosses 230 on both sides along the Z direction, and the bosses 230 extend toward the side away from the guide rod 100;

[0023] An annular mounting groove 240 is formed on each of the bosses 230 . A rolling element 250 is disposed in the mounting groove 240 . The sleeve 200 can rotate relative to the second external device 600 via the rolling element 250 .

[0024] In an embodiment of the present application, by adding a mounting groove 240 and a rolling member 250 to the sleeve 200, the sleeve 200 can rotate relative to the second external device 600, thereby facilitating the assembly of the sleeve 200 and the stop member 300 onto the guide rod 100, thereby realizing the connection between the first external device 500 and the second external device 600.

[0025] In one technical solution of the above-mentioned anti-falling device, the connecting member 400 includes a mounting plate 410 and a first bolt 420, and the end of the sleeve 200 away from the first external device 500 along the Z direction is limited to the second external device (600), and the mounting plate 410 is connected to the second external device 600 through the first bolt 420;

[0026] And / or, the guide rod 100 is fixedly connected to the first external device 500 via a second bolt 700 .

[0027] In the second aspect, the present application also provides a battery pack, comprising a box body 800 and an anti-falling device as described in any one of the first aspects, wherein the box body 800 is provided with mounting beams 900 on the side beams on opposite sides along the Y direction, and the anti-falling device is arranged on the mounting beams 900.

[0028] In one technical solution of the above-mentioned anti-falling device, the mounting beam 900 is the second external device 600 .

[0029] In a third aspect, the present application further provides an electric vehicle comprising at least a frame and a battery pack as described in any one of the second aspects, wherein the frame is the first external device 500, and the battery pack is connected to the frame via the anti-falling device.

[0030] The above one or more technical solutions of this application have at least one or more of the following beneficial effects:

[0031] In the technical solution for implementing the present application, the anti-falling device includes a guide rod 100, a sleeve 200, a stopper 300 and a connecting member 400. The guide rod 100 is fixedly connected to the first external device 500 on one side along the Z direction. The sleeve 200 is limited in the second external device 600 and is sleeved on the outer periphery of the end of the guide rod 100 away from the first external device 500. A limiting groove 110 is provided on the side wall of the guide rod 100. A first through hole 210 is provided on the side wall of the sleeve 200. The stopper 300 passes through the first through hole 210 and is clamped in the limiting groove 110. The connecting member 400 is provided on the side of the second external device 600 away from the first external device 500 along the Z direction and is connected to the second connecting device 600 to limit the sleeve 200 in the second external device 600. Through the solution of the present application, when the connection between the connecting member 400 and the second external device 600 is broken or detached, the stop member 300 can be stuck in the limiting groove 110 without displacement and prevent the sleeve 200 from moving away from the first external device 500, thereby preventing the second external device 600 from detaching from the first external device 500.

[0032] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The disclosure of this application will be more easily understood with reference to the accompanying drawings. Those skilled in the art will readily appreciate that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the figures represent similar components, where:

[0034] Figure 1 This is an exploded view of the anti-falling device provided in an embodiment of the present application;

[0035] Figure 2 is a cross-sectional view of an anti-falling device provided in an embodiment of the present application;

[0036] Figure 3 is a cross-sectional view of the anti-falling device provided in an embodiment of the present application after the stopper is removed;

[0037] Figure 4 Schematic diagram of the structure of the guide rod provided in the embodiment of the present application;

[0038] Figure 5 is a schematic structural diagram of a stopper provided in an embodiment of the present application;

[0039] Figure 6 It is a schematic diagram of the three-dimensional structure of the battery pack provided in an embodiment of the present application.

[0040] Description of reference numerals:

[0041] 100. Guide rod; 110. Limiting groove; 111. First groove body; 112. Second groove body; 113. Recess; 114. Notch; 120. Third connecting hole; 200. Bushing; 210. First through hole; 211. First part; 212. Second part; 220. Second through hole; 230. Boss; 240. Mounting groove; 250. Rolling member; 300. Stop member; 310. First section; 320. Second section; 400. Connecting member; 410. Mounting plate; 420. First bolt; 430. First connecting hole; 500. First external device; 600. Second external device; 610. Second connecting hole; 620. Third through hole; 630. Fourth through hole; 700. Second bolt; 800. Box; 900. Mounting beam. DETAILED DESCRIPTION

[0042] Some embodiments of the present application are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application.

[0043] As described in the background technology, in the prior art, the connection between the battery pack and the frame of the electric vehicle is usually achieved by bolt connection technology. During the driving of the vehicle, the bolts can easily become loose or break due to factors such as vibration, causing the battery pack to detach during driving, thereby posing a safety hazard.

[0044] Based on the above problems, the embodiments of the present application creatively propose a new anti-falling device, a battery pack and an electric vehicle. The anti-falling device includes a guide rod 100, a sleeve 200, a stopper 300 and a connector 400. The first external device 500 and the second external device 600 are connected through the anti-falling device. When the connection between the connector 400 and the second external device 600 is broken or detached, the stopper 300 can be stuck in the limit groove 110 without displacement and prevent the sleeve 200 from moving away from the first external device 500, thereby preventing the second external device 600 from detaching from the first external device 500.

[0045] The solution of this application will be described in detail below with reference to the accompanying drawings and various embodiments.

[0046] Example 1

[0047] Figure 1 This is an exploded view of the anti-falling device provided in an embodiment of the present application. Figure 2 This is a cross-sectional view of the anti-falling device provided in the embodiment of the present application, referring to Figure 1 and Figure 2 As shown, the anti-fall device provided in the embodiment of the present application generally includes a guide rod 100, a sleeve 200, a stopper 300, and a connector 400. The guide rod 100 is fixedly connected to the first external device 500 on one side along the Z direction, the sleeve 200 is confined in the second external device 600 and sleeved on the outer periphery of the end of the guide rod 100 away from the first external device 500, and the connector 400 is provided on the side of the second external device 600 away from the first external device 500 along the Z direction and connected to the second connector 600 to confine the sleeve 200 in the second external device 600. Furthermore, a limiting groove 110 is provided on the side wall of the guide rod 100, and a first through hole 210 is provided on the side wall of the sleeve 200. The stopper 300 passes through the first through hole 210 and is fixed in the limiting groove 110, and the stopper 300 can reciprocate along the first through hole 210 within a preset range. In this way, when the connection between the connecting member 400 and the second external device 600 is broken or detached, due to the action of gravity, the sleeve 200 together with the second external device 600 will move downward along the guide rod 100 (i.e., away from the first external device 500), but because the stop member 300 is stuck in the limiting groove 110 and does not move, the sleeve 200 is eventually stuck by the stop member 300, thereby preventing the second external device 600 from detaching from the first external device 500.

[0048] Further references Figure 2As shown, in some specific embodiments, the extension direction of the first through hole 210 is arranged at an angle to the radial direction of the sleeve 200. Preferably, along the Z direction, the angle between the extension direction of the first through hole 210 and the radial direction of the sleeve 200 is less than 90°. Therefore, when the connection between the connector 400 and the second external device 600 is broken or disconnected, when the sleeve 200 and the second external device 600 move downward along the guide rod 100 under the action of gravity, the stopper 300 can be better retained in the limiting groove 110 without displacement, thereby preventing the second external device 600 from being separated from the first external device 500.

[0049] Further references Figure 1 As shown, in some specific embodiments, the sleeve 200 is generally cylindrical in structure. The sleeve 200 further defines a second through hole 220, which extends along the Z direction. That is, the second through hole 220 penetrates the sleeve 200 along the axial direction of the sleeve 200, and the sleeve 200 is sleeved on the guide rod 100 through the second through hole 220.

[0050] Further references Figure 1 and Figure 2 As shown, the sleeve 200 is further provided with bosses 230 on both sides along the Z direction. The bosses 230 extend toward the side away from the guide rod 100. That is, the bosses 230 extend on the sleeve 200 in a radial direction away from the sleeve 200. Furthermore, each boss 230 is provided with an annular mounting groove 240, and a rolling element 250 is disposed within the mounting groove 240. It will be understood that by adding the mounting groove 240 and the rolling element 250 to the sleeve 200, the sleeve 200 can rotate relative to the second external device 600, thereby facilitating the assembly of the sleeve 200 and the stopper 300 onto the guide rod 100, thereby achieving the connection between the first external device 500 and the second external device 600.

[0051] It should be noted that the specific implementation of the rolling element 250 is not limited in the embodiments of this application and may be selected based on actual needs without violating the inventive concept of this application. For example, the rolling element 250 includes, but is not limited to, a ball, a guide wheel, or a slider. For example, if the rolling element 250 is a ball, during assembly, the ball can be first assembled into the mounting groove 240 using a thermal expansion and contraction process, and the stopper 300 can be assembled into the first through-hole 210.

[0052] Reference Figure 3 As shown, in some specific embodiments, the first through hole 210 includes at least a first portion 211 and a second portion 212, the first portion 211 and the second portion 212 are connected to each other, the first portion 211 is arranged close to the outer wall of the sleeve 200, and the second portion 212 is arranged close to the inner wall of the sleeve 200, and the aperture of the first portion 211 is smaller than the aperture of the second portion 212. Figure 5 As shown, the stopper 300 includes a first section 310 and a second section 320 connected together. Along the length of the stopper 300, the cross-sectional area of ​​the second section 320 is larger than that of the first section 310. When the stopper 300 is assembled into the sleeve 200, the first section 310 is located in the first portion 211, and the second section 320 is located in the second portion 212. Furthermore, the aperture of the first portion 211 is smaller than the cross-sectional area of ​​the second section 320 along the length of the stopper 300. As a result, the first section 310 of the stopper 300 can be inserted into the first portion 211 of the first through-hole 210, but the second section 320 of the stopper 300 cannot pass through the first portion 211 of the first through-hole 210. This prevents the second section 320 from moving along the first through-hole 210 toward the exterior of the sleeve 200, thereby preventing the stopper 300 from falling out of the first through-hole 210 after the sleeve 200 is assembled into the guide rod 100.

[0053] In other specific embodiments, a stopper (not shown) can be provided in the first through hole 210 to prevent the stopper 300 from falling out of the first through hole 210. It should be noted that the specific implementation of the stopper is not limited in the embodiments of the present application and can be set according to actual product requirements during implementation. For example, an annular protrusion or an annular member can be provided in the first through hole 210 near the outer side of the sleeve 200 to prevent the second section 320 from moving along the first through hole 210 toward the outside of the sleeve 200.

[0054] Reference Figure 4 As shown, in some specific embodiments, the guide rod 100 is a columnar structure. The limiting groove 110 is provided on the side wall of the guide rod 100 and is located at the end of the guide rod 100 away from the first external device 500. The limiting groove 110 includes a first groove body 111, a second groove body 112, a recess 113 and a notch 114. Figure 4 As shown, the first groove body 111 and the second groove body 112 are interconnected and extend in different directions, so that the stopper 300 is not easily removed from the limiting groove 110 after being assembled into the limiting groove 110. Preferably, in the embodiment of the present application, the extension direction of a portion of the second groove body 112 can be set to form an angle with the extension direction of the first groove body 111, and the extension direction of a portion of the second groove body 112 can be set to be parallel to the extension direction of the first groove body 111, thereby further improving the effect of preventing the stopper 300 assembled into the limiting groove 110 from being easily removed from the limiting groove 110.

[0055] Further references Figure 3 and Figure 4As shown, the recess 113 is arranged at the bottom of the second groove body 112, and the extension direction of the recess 113 is the same as the extension direction of the first through hole 210. When the sleeve 200 is assembled on the guide rod 100, one end of the stop member 300 is passed through the first through hole 210, and the other end is clamped in the recess 113, so that the stop member 300 can be confined in the limiting groove 110, thereby realizing the connection between the sleeve 200 and the guide rod 100.

[0056] Further references Figure 4 As shown, the notch 114 is provided at one end of the first groove body 111 away from the second groove body 112. When the sleeve 200 is assembled to the guide rod 100, the stop member 300 is first passed through the first through hole 210, and then the sleeve 200 is put on the guide rod 100. At this time, one end of the stop member 300 (that is, the end of the second section 320 away from the first section 310) can enter the first groove body 111 and the second groove body 112 in turn through the notch 114 and then be stuck in the recess 113, thereby realizing the connection between the sleeve 200 and the guide rod 100.

[0057] Further references Figure 1 and Figure 2 The connector 400 includes a mounting plate 410 and a first bolt 420. The end of the sleeve 200, which is located away from the first external device 500 along the Z direction, is fixed to the second external device 600. The mounting plate 410 is connected to the second external device 600 via the first bolt 420. In a specific implementation, a first connection hole 430 is defined in the mounting plate 410, and a second connection hole 610 is defined in the second external device 600. The first bolt 420 is connected to the first connection hole 430 and the second connection hole 610 to achieve connection between the mounting plate 410 and the second external device 600.

[0058] Further references Figures 1 to 4 As shown, the guide rod 100 is fixedly connected to the first external device 500 via a second bolt 700. In a specific implementation, a third connection hole 120 is defined on the guide rod 100, and a fourth connection hole (not shown) is defined on the first external device 500. The connection between the guide rod 100 and the first external device 500 is achieved by connecting the second bolt 700 to the third connection hole 120 and the fourth connection hole.

[0059] Further references Figure 1As shown, the second external device 600 is further provided with a third through-hole 620 and a fourth through-hole 630. The third through-hole 620 is provided on the end face of the second external device 600 proximal to the first external device 500. When the device is assembled, the guide rod 100 passes through the third through-hole 620 and is embedded in the second through-hole 220 of the sleeve 200. Preferably, the outer diameter of the boss 230 on the side proximal to the first external device 500 is larger than the diameter of the third through-hole 620, thereby confining the end of the sleeve 200 proximal to the first external device 500 within the second external device 600 and preventing the end of the sleeve 200 proximal to the first external device 500 from falling out of the third through-hole 620.

[0060] Further references Figure 1 As shown, the fourth through hole 630 is defined on the end face of the second external device 600 away from the first external device 500. When the device is assembled, the end of the sleeve 200 away from the first external device 500 is embedded in the fourth through hole 630. Preferably, the outer diameter of the boss 230 on the side away from the first external device 500 is equal to or slightly smaller than the diameter of the third through hole 620, thereby confining the end of the sleeve 200 away from the first external device 500 in the fourth through hole 630. After the mounting plate 410 is connected to the second external device 600, the sleeve 200 is confined in the second external device 600.

[0061] In summary, the anti-falling device provided by the present application is implemented. When assembling, the guide rod 100 is first fixedly connected to the first external device 500 by the second bolt 700, the stopper 300 is assembled into the first through hole 210 of the sleeve 200, the rolling member 250 is assembled into the mounting groove 240 of the sleeve 200, and then the sleeve 200 equipped with the stopper 300 is assembled into the second external device 600 and the end of the sleeve 200 away from the first external device 500 is confined in the fourth through hole 630, and then the mounting plate 410 is connected to the second external device 600 by the first bolt 420. The external device 600 is mounted on the shaft sleeve 200 to confine the shaft sleeve 200 in the second external device 600. Finally, the guide rod 10 and the first external device 500 are kept stationary, and the shaft sleeve 200 and the second external device 600 are mounted on the guide rod 100 through the second through hole 220 and the third through hole 620. During this process, the second section 320 of the stopper 300, which is away from the end of the first section 310, enters the first groove body 111 and the second groove body 112 in turn through the notch 114 on the limiting groove 110 and is then clamped in the recess 113, thereby realizing the connection between the shaft sleeve 200 and the guide rod 100. It can be understood that, in the process that the end of the second section 320 of the stop member 300 away from the first section 310 enters the first groove body 111 and the second groove body 112 in turn through the notch 114 on the limiting groove 110 and is then clamped in the recess 113, the sleeve 200 rotates relative to the second external device 600 and the guide rod 100 through the rolling member 250, thereby facilitating the assembly of the sleeve 200 and the stop member 300 onto the guide rod 100.

[0062] The anti-falling device provided by the present application is implemented. When disassembling, the mounting plate 410 is first disassembled from the second external device 600, and then the sleeve 200 together with the second external device 600 is moved along the guide rod 100 toward the first external device 500 (i.e., along the Z direction). At this time, the stopper 300 is displaced to a certain extent along the first through hole 210 in the direction away from the guide rod 100 due to the action of the force, so that the stopper 300 falls off from the recess 113, and the sleeve 200 and the second external device 600 continue to move along the guide rod 100 toward the first external device 500. During the movement of an external device 500 (i.e., along the Z direction), the stop member 300 can move along the second groove body 112 to the first groove body 111, and then move the sleeve 200 and the second external device 600 along the guide rod 100 away from the first external device 500 (i.e., along the Z direction). At this time, the stop member 300 can move along the first groove body 111 to the notch 114, and finally fall off from the limit groove 110 through the notch 114, thereby separating the sleeve 200 and the second external device 600 from the guide rod 100 and the first external device 500.

[0063] Example 2

[0064] Corresponding to the above embodiment 1, the present application also provides a battery pack, referring to Figure 6 As shown, the battery pack includes at least a box 800 and an anti-dropping device as described in any one of the first embodiments. Mounting beams 900 are provided on the side beams of the box 800 on opposite sides along the Y direction, and the anti-dropping device is provided on the mounting beams 900. In this embodiment, the same or similar contents as those in the first embodiment can be referred to above and will not be further described.

[0065] In some specific embodiments, the mounting beam 900 is the second external device 600 in the above-mentioned first embodiment;

[0066] In some other specific embodiments, the mounting beam 900 is a part of the second external device 600 in the first embodiment.

[0067] Example 3

[0068] Corresponding to the above-mentioned embodiment 1 or 2, the present application further provides an electric vehicle, comprising at least a vehicle frame and a battery pack as described in any one of the embodiments 2, wherein the vehicle frame is the first external device 500, and the battery pack is connected to the vehicle frame via the anti-drop device. In this embodiment, the same or similar contents as those in the above-mentioned embodiment 1 or 2 can be referred to above and will not be further elaborated.

[0069] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0070] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0071] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0072] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0073] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. An anti-falling device, characterized in that: include: A guide rod (100) is fixedly connected to the first external device (500) along one side of the Z direction, and a limiting groove (110) is provided on the side wall of the guide rod (100); A shaft sleeve (200) is defined in the second external device (600) and is sleeved on the outer periphery of an end of the guide rod (100) away from the first external device (500), with a gap left between the shaft sleeve (200) and the first external device (500), a first through hole (210) is formed on the side wall of the shaft sleeve (200), and an extension direction of the first through hole (210) is arranged at an angle to the radial direction of the shaft sleeve (200); A stopper (300) passes through the first through hole (210) and is locked in the limiting groove (110), and the stopper (300) can move back and forth along the first through hole (210) within a preset range; The connecting member (400) is provided on a side of the second external device (600) away from the first external device (500) along the Z direction and is connected to the second external device (600) to confine the shaft sleeve (200) in the second external device (600).

2. The anti-falling device according to claim 1, characterized in that: The limiting groove (110) comprises a first groove body (111) and a second groove body (112) which are interconnected and extend in different directions, and a recess (113) provided at the bottom of the second groove body (112); The extending direction of the recess (113) is the same as the extending direction of the first through hole (210), and the stopper (300) passes through the first through hole (210) and is clamped in the recess (113).

3. The anti-falling device according to claim 2, characterized in that: The limiting groove (110) further comprises a notch (114) provided at one end of the first groove body (111) away from the second groove body (112); when the shaft sleeve (200) is assembled to the guide rod (100), one end of the stopper (300) passing through the first through hole (210) can sequentially enter the first groove body (111) and the second groove body (112) through the notch (114) and then be clamped in the recess (113).

4. The anti-falling device according to claim 2, characterized in that: The extension direction of part of the second trough body (112) is arranged at an angle to the extension direction of the first trough body (111), and the extension direction of part of the second trough body (112) is parallel to the extension direction of the first trough body (111).

5. The anti-falling device according to any one of claims 1 to 4, characterized in that: The stopper (300) includes a first section (310) and a second section (320) connected to each other; Along the length direction of the stopper (300), the cross-sectional area of ​​the second section (320) is greater than the cross-sectional area of ​​the first section (310); The first through hole (210) comprises at least a first portion (211) and a second portion (212) that are interconnected, the first section (310) is located in the first portion (211), and the second section (320) is located in the second portion (212), and the aperture of the first portion (211) is smaller than the cross-sectional area of ​​the second section (320) along the length direction of the stopper (300) so as to prevent the second section (320) from moving along the first through hole (210) toward the outside of the sleeve (200).

6. The anti-falling device according to claim 5, characterized in that: The shaft sleeve (200) is provided with bosses (230) on both sides along the Z direction, and the bosses (230) extend toward a side away from the guide rod (100); An annular mounting groove (240) is provided on each boss (230), a rolling element (250) is provided in the mounting groove (240), and the shaft sleeve (200) can rotate relative to the second external device (600) via the rolling element (250).

7. The anti-falling device according to any one of claims 1 to 4, characterized in that: The connecting member (400) includes a mounting plate (410) and a first bolt (420); one end of the sleeve (200) away from the first external device (500) along the Z direction is limited to the second external device (600); and the mounting plate (410) is connected to the second external device (600) via the first bolt (420); And / or, the guide rod (100) is fixedly connected to the first external device (500) via a second bolt (700).

8. A battery pack, characterized in that: The invention comprises a box body (800) and an anti-falling device according to any one of claims 1 to 7, wherein mounting beams (900) are provided on the side beams on opposite sides of the box body (800) along the Y direction, and the anti-falling device is provided on the mounting beams (900).

9. The battery pack according to claim 8, characterized in that: The mounting beam (900) is the second external device (600).

10. An electric vehicle, characterized in that: The vehicle comprises at least a vehicle frame and a battery pack as claimed in claim 8 or 9, wherein the vehicle frame is the first external device (500), and the battery pack is connected to the vehicle frame via the anti-falling device.

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