A locking mechanism

Abstract

The present invention relates to the technical field of electric vehicles, and in particular to a locking mechanism. The locking mechanism is used to lock the battery pack on the vehicle beam to ensure that the battery pack maintains a stable connection with the vehicle body during the movement of the vehicle. The locking mechanism includes a fixing seat and a locking member. The fixing seat is arranged on the vehicle beam, and the fixing seat is provided with a locking hole and an anti-reversal locking surface. The locking member is fixedly arranged on the battery pack. The locking member includes a pivoting portion and a locking portion. The locking portion can pass through the locking hole and rotate along the anti-reversal locking surface to a locked and anti-reversal state, so that the battery is locked on the vehicle beam. When locking the battery pack, the locking portion can be placed on the anti-reversal locking surface to prevent the battery pack from automatically rotating and sliding out due to vibration during the operation of the vehicle, providing resistance to the rotation of the locking member, improving the stability of the battery pack locking, and providing stable support for the battery pack locking and fixing. At the same time, the structure is simple, the operator is convenient, and locking and unlocking are convenient and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to a locking mechanism. Background Art

[0002] With the rapid development of new energy vehicles, people are increasingly demanding battery packs with longer driving range and higher charging efficiency. Currently, battery packs generally face issues such as high cost, short driving range, and long charging times. The emergence of battery swapping provides new vitality to solve these current battery pack problems.

[0003] The battery swap model requires rapid battery swapping technology, which is closely related to the performance of the battery pack's locking mechanism. This locking mechanism not only locks the battery pack to the vehicle, but also must be safe and reliable, require low precision in locking and unlocking the battery pack, and be easy to install. It must also be adaptable to different vehicles, ensuring quick and safe locking and unlocking of the battery pack to the vehicle.

[0004] In the prior art, in order to stably lock the battery pack on the vehicle, a plurality of fixing components are generally provided after the locking mechanism completes the locking action to prevent the locking mechanism from automatically unlocking during the operation of the vehicle. This results in a complex structure of the locking mechanism and cumbersome operation, which causes the locking and unlocking process to be time-consuming.

[0005] In order to solve the above problems, it is urgent to provide a locking mechanism to solve the problem that the locking and unlocking processes are time-consuming due to the complex structure and cumbersome operation. Summary of the Invention

[0006] The purpose of the present invention is to provide a locking mechanism that has a simple structure, is easy to operate, and can lock and unlock quickly and easily.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A locking mechanism is configured to lock a battery pack on a vehicle beam, the locking mechanism comprising:

[0009] A fixing seat, the fixing seat being arranged on the vehicle beam and having a locking hole and an anti-reverse locking surface; and

[0010] A locking member is provided on the battery pack, and the locking member includes a pivot portion and a locking portion. The locking portion can pass through the locking hole and rotate along the anti-reversal locking surface to a locked and anti-reversal state, so that the battery pack is locked on the vehicle beam.

[0011] As an optional solution, the anti-reversal locking surface includes a climbing surface and an anti-reversal working section, and the climbing surface and the anti-reversal working section are arranged on the side of the fixing seat facing away from the battery pack, and during the locking process of the locking member, the climbing surface and the anti-reversal working section are connected to the end of the climbing surface.

[0012] As an optional solution, the anti-reversal working section is a negative lift surface or a self-locking inclined surface with an inclination smaller than the self-locking angle.

[0013] As an optional solution, the climbing surface is a plane or spiral surface that rotates upward in an annular manner, and the inclination height of the climbing surface gradually increases along the direction of the locking movement of the locking member; the negative lift surface is a plane or spiral surface that rotates downward in an annular manner, and the inclination height of the negative lift surface gradually decreases along the direction of the locking movement of the locking member.

[0014] As an optional solution, the locking portion is provided with an adaptive inclined surface corresponding to the helical surface, and the helical surface and the inclined surface are coordinated helical surfaces.

[0015] As an optional solution, the locking mechanism further includes:

[0016] The elastic member is configured to provide a pre-tightening force between the locking portion and the anti-reversal locking surface.

[0017] As an optional solution, the locking member further includes a second limiting portion, and the second limiting portion is provided at an end of the pivoting portion away from the locking portion.

[0018] As an optional solution, the elastic member is arranged between the second limiting portion and the battery pack, and / or the elastic member is arranged between the battery pack and the vehicle beam.

[0019] As an optional solution, the fixing seat further includes:

[0020] The first limiting portion is provided at an end of the negative lift surface away from the climbing surface, and the first limiting portion is configured to constrain the rotation of the locking member to an extreme position.

[0021] As an optional solution, the locking portion is a fan-shaped structure or a rectangular structure.

[0022] As an optional solution, high friction material is provided between the battery pack and the vehicle beam.

[0023] As an optional solution, a buffer is provided between the battery pack and the vehicle beam, and the buffer is made of a buffer material.

[0024] As an optional solution, a driving groove is provided at one end of the locking member away from the locking portion, and the locking mechanism further comprises:

[0025] A locking driving member can be inserted into the driving slot to drive the locking member to rotate.

[0026] The beneficial effects of the present invention are:

[0027] The present invention provides a locking mechanism. The locking mechanism is used to lock the battery pack on the vehicle beam to ensure that the battery pack maintains a stable connection with the vehicle body during the movement of the vehicle. The locking mechanism includes a fixing seat and a locking member. The fixing seat is arranged on the vehicle beam, and the fixing seat is provided with a locking hole and an anti-reverse locking surface. The locking member is fixedly arranged on the battery pack. The locking member includes a pivoting portion and a locking portion. The locking portion can pass through the locking hole and rotate along the anti-reverse locking surface to a locked and anti-reverse state, so that the battery is locked on the vehicle beam. When locking the battery pack, the locking portion can be placed on the anti-reverse locking surface to prevent the battery pack from automatically rotating and sliding out due to vibration during the operation of the vehicle, providing resistance to the rotation of the locking member, improving the stability of the battery pack locking, and providing stable support for the battery pack locking and fixing. At the same time, the structure is simple, the operator is convenient, and locking and unlocking are convenient and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in describing the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without any creative work.

[0029] Figure 1 is a structural schematic diagram of a locking mechanism provided by an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure of the fixing seat provided by the embodiment of the present invention. Figure 1 ;

[0031] Figure 3 This is a schematic diagram of the structure of the fixing seat provided by the embodiment of the present invention. Figure 2 ;

[0032] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle;

[0033] Figure 5 This is a schematic diagram of the structure of the locking member provided by the embodiment of the present invention. Figure 1 ;

[0034] Figure 6 This is a schematic diagram of the structure of the locking member provided by the embodiment of the present invention. Figure 2 .

[0035] The following are marked in the figure:

[0036] 100-fixed seat; 110-locking hole; 120-climbing surface; 130-negative lifting surface; 140-first limit part;

[0037] 200 - locking member; 210 - pivoting portion; 220 - locking portion; 221 - inclined surface; 230 - second limiting portion; 240 - driving slot;

[0038] 300 - locking drive member; 310 - unlocking portion; 320 - hand-held portion; 330 - buffer member; 340 - third limiting portion;

[0039] 400-elastic parts;

[0040] 500-buffer;

[0041] 600-sensor;

[0042] 700-car beam;

[0043] 800-battery pack. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It will be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate components of the present invention, not the entire structure.

[0045] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and may refer to the interconnection of structures within two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific contexts.

[0046] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, terms such as "upper," "lower," "left," and "right" are used to refer to positions or locations based on those shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0048] With the rapid development of new energy vehicles, people are increasingly demanding the battery pack 800's range and charging efficiency. Currently, battery packs 800 generally face issues such as high cost, limited range, and long charging times. The emergence of battery swapping offers new opportunities to address these challenges.

[0049] The battery swap mode requires the technology of fast battery swapping, and fast battery swapping is closely related to the performance of the locking mechanism of the battery pack 800. The locking mechanism not only has the function of locking the battery pack 800 on the car, but also must have the advantages of being safe and reliable, requiring low precision in locking and unlocking the battery pack 800, and being easy to install. It can also be applied to different vehicles to achieve the effect of quickly and safely locking and unlocking the battery pack 800 and the car. Specifically, in order to facilitate the fixation of the battery pack 800, the battery pack 800 includes a battery pack body and a support ear. The battery pack 800 is fixed to the frame 700 by connecting the locking mechanism to the support ear.

[0050] like Figure 1 As shown, this embodiment provides a locking mechanism for locking the battery pack 800 to the vehicle beam 700 to ensure that the battery pack 800 maintains a stable connection with the vehicle body during vehicle movement. The locking mechanism includes a fixing seat 100 and a locking member 200. The fixing seat 100 is disposed on the vehicle beam 700. The fixing seat can be integrally formed with the vehicle beam 700 or fixed to the vehicle beam 700 by screw connection or other means. The fixing seat 100 is provided with a locking hole 110 and an anti-reverse locking surface. The locking member 200 is fixed to the battery pack 800 and includes a pivoting portion 210 and a locking portion 220. The locking portion 220 can pass through the locking hole 110 and rotate along the anti-reverse locking surface to a locked and anti-reverse state, thereby locking the battery pack 800 to the vehicle beam 700. When locking the battery pack, the locking portion 220 can rest on the anti-reverse locking surface, preventing the battery pack from automatically rotating and sliding out due to vibration during vehicle operation. This provides resistance to the rotation of the locking member 200, improves the stability of the battery pack 800, and provides stable support for the locked and fixed battery pack 800. This structure is simple, easy to operate, and locking and unlocking are quick and easy.

[0051] Please continue to see Figure 1As an optional solution, the locking member 200 also includes a second limiting portion 230, which is located at one end of the pivot portion 210 away from the locking portion 220. The second limiting portion 230 is used to support the weight of the battery pack 800 so that the locking member 200 can lock the battery pack 800 on the vehicle beam 700.

[0052] Specifically, the fixing base 100 and the vehicle beam 700 can be fixed by welding to improve the stability of the connection between the fixing base 100 and the vehicle beam 700. Of course, in other embodiments, the fixing base 100 and the vehicle beam 700 can also be detachably connected by screwing or other means, or directly integrated with the vehicle beam 700. The operator can make a specific choice according to needs, and this embodiment does not specifically limit this.

[0053] In order to facilitate the positioning of the battery pack 800 during installation, a positioning cone pin is provided on the battery pack 800 and a positioning pin hole is provided on the vehicle. The positioning cone pin can be inserted into the positioning pin hole so that the operator can quickly locate the installation position of the battery.

[0054] like Figure 2 and Figure 3 As shown, the anti-reversal locking surface includes a climbing surface 120 and an anti-reversal working section. The climbing surface 120 and the anti-reversal working section are located on the side of the fixing base 100 facing away from the battery pack 800. During the locking process, the climbing surface 120 and the anti-reversal working section connect at the end of the climbing surface 120, so that the climbing surface 120 and the anti-reversal working section are sequentially arranged along the circumference of the locking hole 110. The locking portion 220 rotates and rests on the anti-reversal working section. When locking the battery pack 800, the locking member 200 can pass through the locking hole 110 and rotate sequentially along the climbing surface 120 and the anti-reversal working section, stopping on the side of the anti-reversal working section away from the climbing surface 120. The climbing surface 120 facilitates the gradual upward movement of the locking member 200 to the upper end surface of the fixing base 100, making it easier for the operator to lock the battery pack 800. Furthermore, by reducing the compressive force between the locking portion 220 and the anti-reverse locking surface during unlocking, the locking portion 220 can gradually move downward through the climbing surface 120 to exit the unlocking process, further facilitating the unlocking process for the operator. After the locking member 200 reaches the upper end surface of the fixing base 100, it can gradually lower along the anti-reverse working section and overlap the anti-reverse working section, preventing it from automatically rotating and sliding out due to vibration during vehicle operation. This provides resistance to the rotation of the locking member 200 and improves the stability of the battery pack 800 locking. It is understood that the contour shape of the locking hole 110 is the same as the cross-sectional shape of the locking member 200, facilitating the locking member 200's insertion through the locking hole 110.

[0055] Please continue to see Figure 2Optionally, the fixing base 100 further includes a first limiter 140, disposed at the end of the negative lift surface 130 away from the climbing surface 120. The first limiter 140 can constrain the locking member 200 to its maximum rotational position, thereby preventing excessive rotation. Furthermore, because the first limiter 140 restricts rotation to one direction, the operator can only rotate the locking member 200 in the direction where the first limiter 140 is not provided during the locking process. This allows the locking member 200 to sequentially pass through the climbing surface 120, the horizontal section, and the negative lift surface 130, providing a movement direction for the locking process.

[0056] Specifically, the anti-reversal working section is a negative helical surface 130 or a self-locking inclined surface with an inclination less than the self-locking angle. A first stopper 140 with a counter-rotating helical surface is provided at the end of the climbing surface 120. Once the locking portion 220 enters the anti-reversal section, the force exerted by the pivoting portion 210 pulling the locking portion 220 outward creates a force against the first stopper 140, preventing rotation in the unlocking direction, thereby achieving release.

[0057] like Figures 2 to 4 As shown, as an optional solution, the climbing surface 120 is a circular plane or spiral surface that rotates upward, and the inclination direction of the climbing surface 120 gradually increases along the direction of the locking movement of the locking member 200, as shown in FIG. Figure 4 The height difference between the upper end surface and the lower end surface of the lifting surface 120 is △H, so that the locking member 200 is gradually lifted during the locking process, which saves time and effort for the operator; the negative lifting surface 130 is a plane or spiral surface that rotates downward in an annular manner, and the inclined height of the negative lifting surface 130 gradually decreases along the direction of the locking movement of the locking member 200. Figure 4 The height difference between the upper and lower ends of the lifting surface 120 is Δh, which provides resistance to the rotation of the locking member 200 and improves the locking stability of the battery pack 800. Furthermore, the spirally ascending climbing surface 120 and the spirally descending negative lifting surface 130 are provided to reduce the friction coefficient and facilitate locking or unlocking.

[0058] Please continue to see Figures 2 to 4 Furthermore, the climbing surface 120 and the negative lift surface 130 are spaced apart so that a horizontal section that is higher than the climbing surface 120 and the negative lift surface 130 is left between the climbing surface 120 and the negative lift surface 130, and the climbing surface 120 and the negative lift surface 130 have a smooth transition with the horizontal section, so that the locking and unlocking process of the locking member 200 is smooth, which is convenient for the operator to operate.

[0059] like Figures 2 to 4As shown, there are multiple locking portions 220. The multiple locking portions 220 are disposed at one end of the pivot portion 210 and are spaced apart along the circumference of the pivot portion 210. The locking portions 220 can pass through the locking hole 110 and rest on the negative lift surface 130 to lock the battery pack 800. The multiple locking portions 220 provide support for securing the battery pack 800, facilitating balanced force on the locking member 200 and improving the safety and stability of securing the battery pack 800.

[0060] Please continue to see Figure 2 In order to facilitate the operator to detect the battery locking status, the locking mechanism also includes a sensor 600, which is arranged on the fixing seat 100. The sensor 600 can sense the position of the locking part, and the sensor 600 is electrically connected to the vehicle-mounted VCU. When the locking pin of the locking mechanism is loose, the cab control light will light up to alert the driver that the locking mechanism is loose.

[0061] like Figure 5 As shown, as a preferred embodiment, the locking portion 220 is provided with an adapted inclined surface 221 corresponding to the helical surface. The helical surface and the inclined surface 221 are used in conjunction with each other to facilitate the locking portion 220 to align with the anti-reversal locking surface during rotation and fixation. Furthermore, a helical surface is provided at the bottom of the locking portion 220, which rotates in the same direction as the anti-reversal segment. When locked, this surface contacts the anti-reversal segment's helical surface, reducing the contact stress between the two parts under locking pressure and thus improving service life.

[0062] Please continue to see Figure 1 and Figure 6 As a preferred embodiment, the front end of the locking portion 220 is configured as a tapered structure, the tip of which is smaller than the size of the locking hole 110, making it easier for the operator to insert the locking member 200 into the locking hole 110. The inclined surface of the tapered structure can provide a guide for the locking portion 220 to be inserted into the locking hole 110.

[0063] Please continue to see Figure 1 and Figure 6Specifically, the locking portion 220 is a fan-shaped structure. The width of the locking portion 220 gradually increases in the direction away from the pivot portion 210. The locking portion 220 forms a projection on a plane perpendicular to the insertion axis. The fan-shaped structure can increase the contact area of the locking portion 220 on the fixing seat 100, so that the bottom edge of the locking portion 220 forms a linear contact with the spiral surface, thereby facilitating the stability and safety of the locking member 200 in fixing the battery pack 800. The fan-shaped structure also has an aesthetically pleasing appearance. There are two locking portions 220, which are arranged opposite each other to form a T-shaped locking portion. This makes it easier for the operator to align the locking member 200 with the locking hole 110 when installing the battery pack 800, thereby facilitating the assembly process for the operator. For example, in this embodiment, the locking portion 220 can be rotated 90° to 130° to lock the battery pack 800 to the vehicle beam 700. Of course, in other embodiments, the operator may set the angle of the fan-shaped locking portion 220 according to needs, and the rotation angle of the locking portion 220 may change, which is not limited in this embodiment.

[0064] In other embodiments, the locking portion 220 may also be a rectangular structure, which is simple in structure and easy to process.

[0065] like Figure 1 As shown, the end of the locking member 200 facing away from the beam 700 is provided with a drive slot 240. The locking mechanism also includes a locking driver 300 that cooperates with the locking member. The locking driver 300 can be inserted into the drive slot 240, thereby driving the locking member to rotate to facilitate locking or unlocking. Specifically, the locking driver 300 includes an unlocking portion 310, a handle 320, and a buffer portion 330. The handle 320 is connected to the unlocking portion 310 to facilitate manual operation by the operator. The buffer portion 330 is axially sleeved on the handle 320. The buffer portion 330 can provide a buffer for the contact between the unlocking portion 310 and the locking member 200, avoiding rigid collisions, which is beneficial for improving the service life of the locking member 200 and the locking driver 300. For example, the buffer portion 330 is a spring, which is a conventional buffer component that is easy to purchase and low in cost.

[0066] like Figure 1 As shown, preferably, the locking drive member 300 also includes a third limiting portion 340, which is arranged between the unlocking portion 310 and the hand-holding portion 320 to provide a limit for the operator's hand-holding position. The locking drive member 300 can also cooperate with an adapted battery-changing robot, and the locking drive member 300 is inserted into the driving slot 240 by the battery-changing robot to perform locking and unlocking actions.

[0067] During operation, the operator or the battery-swapping robot inserts the locking member 200 provided on the battery pack 800 through the locking hole 110 and rotates the locking member 200 so that it gradually rises through the climbing surface 120. Then, when it rotates to the negative lift surface 130, it stops rotating. The front end of the locking member 200 rests on the negative lift surface 130, completing the locking of the battery pack 800. During the rotation process, it is necessary to offset the preload force of the elastic member 400 and provide a certain amount of compression force to compress the elastic member 400 to a predetermined displacement. This action is simple and easy to operate. When unlocking is required, the operator or the battery-exchanging robot first offsets a certain pre-tightening force of the elastic part 400, increases the distance between the locking part 220 and the anti-reverse locking surface, pushes the locking part 200 to drive the battery pack 800 to lift upward and rotate in the opposite direction, so that the locking part 200 withdraws from the negative lifting surface 130, and then can continue to rotate downward on the climbing surface 120 to unlock, so that the locking part 200 withdraws from the locking hole 110 when the angle corresponds to the locking hole 110, completing the unlocking action.

[0068] As an optional solution, the locking mechanism also includes an elastic member 400, which provides a preload between the locking portion 220 and the anti-reverse locking surface. The elastic member 400 facilitates the locking mechanism's clamping and locking of the battery pack 800 to the vehicle beam 700, while also preventing the locking mechanism from loosening when the vehicle vibrates.

[0069] like Figure 1 As shown, the elastic member 400 is further disposed between the second limiting portion 230 and the battery pack 800. When the pivoting portion 210 is pulled into the fixing base 100, it is compressed, exerting an outward pulling force on the pivoting portion 210 and a compressing force on the battery pack 800 toward the fixing base 100. This forces the battery pack 800 into close contact with the fixing base 100 and, through friction, prevents the battery pack 800 from moving relative to the fixing base 100. This allows the elastic member 400 to adjust the spacing between the second limiting portion 230 and the battery pack support ear, providing a buffer between the second limiting portion 230 and the battery pack support ear. This allows the locking mechanism to eliminate machining precision errors and improve the tolerance performance of the locking mechanism. Simultaneously, the elastic member 400 enables the locking portion 220 to fit tightly against the fixing base 100, providing a predetermined preload force and improving the stability of the locking member 200 in locking the battery pack 800.

[0070] At the same time, the elastic member 400 can also be arranged between the battery pack 800 and the beam 700. The beam 700 is flexibly separated from the battery pack 800, reducing the resonance between the battery pack 800 and the beam 700 during the driving process of the car, and playing a flexible shock-absorbing role. Specifically, the buffer member (500) is preferably a high friction coefficient gasket to increase the friction between the beam 700 and the battery, thereby preventing the battery from moving relative to the beam 700 and reducing the vibration of the battery during the driving process of the car.

[0071] Alternatively, elastic members 400 are provided between the second limiting portion 230 and the battery pack 800 and between the battery pack 800 and the vehicle beam 700. The elastic members 400 provided at different positions respectively play different elastic buffering roles. The specific effects are the same as those described above and will not be repeated here.

[0072] like Figure 1 As shown, as an optional solution, a spring can be used as the elastic member 400. The spring provides a buffer between the second limiter 230 and the battery pack bracket, thereby eliminating machining precision errors and improving the locking mechanism's tolerance. Furthermore, the elastic member 400 allows the locking portion 220 to fit tightly against the mounting base 100, providing a predetermined preload force and improving the stability of the locking member 200 in securing the battery pack 800.

[0073] Optionally, a buffer member 500 is provided between the battery pack 800 and the vehicle beam 700. The buffer member 500 is preferably made of buffer material, or the buffer material can also be provided between the battery pack 800 and the fixing seat 100. When the pivot part 210 is pulled into the fixing seat 100, the spring will be compressed, applying an outward pulling force to the pivot part 210 and a pressing force to the pivot part 210 to the battery pack 800, so that the battery pack 800 is close to the pivot part 210 and the friction force is used to prevent the battery pack 800 from moving relative to the pivot part 210.

[0074] Note that the basic principles and main features of the present invention and the advantages of the present invention are shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, which are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications are intended to fall within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A locking mechanism, characterized in that: It is configured to lock the battery pack (800) on the vehicle beam (700), and the locking mechanism includes: A fixing seat (100), the fixing seat (100) being arranged on the vehicle beam (700), the fixing seat (100) being provided with a locking hole (110) and an anti-reverse locking surface; and a locking member (200) disposed on the battery pack (800), the locking member (200) comprising a pivoting portion (210) and a locking portion (220), the locking portion (220) being capable of passing through the locking hole (110) and rotating along the anti-reversal locking surface to a locked and anti-reversal state, so that the battery pack (800) is locked on the vehicle beam (700); The anti-reversal locking surface comprises a climbing surface (120) and an anti-reversal working section, the climbing surface (120) and the anti-reversal working section are arranged on a side of the fixing seat (100) facing away from the battery pack (800), and during the locking process of the locking member (200), the climbing surface (120) and the anti-reversal working section are connected to the end of the climbing surface (120), and the climbing surface (120) and the anti-reversal working section are arranged in sequence along the circumference of the locking hole 110; When the battery pack (800) is locked, the locking member (200) passes through the locking hole (110) and rotates in sequence along the climbing surface (120) and the anti-reversal working section and stops on the side of the anti-reversal working section away from the climbing surface (120); when the battery pack (800) is unlocked, the pressing force between the locking portion (220) and the anti-reversal locking surface is reduced, and the locking portion (220) can gradually move downward through the climbing surface 120.

2. The locking mechanism according to claim 1, wherein: The anti-reversal working section is a negative lift surface (130) or a self-locking inclined surface with an inclination smaller than the self-locking angle.

3. The locking mechanism according to any one of claim 2, characterized in that: The climbing surface (120) is a plane or spiral surface that rotates upward in an annular manner, and the inclined height of the climbing surface (120) gradually increases along the direction of the locking movement of the locking member (200); the negative lift surface (130) is a plane or spiral surface that rotates downward in an annular manner, and the inclined height of the negative lift surface (130) gradually decreases along the direction of the locking movement of the locking member (200).

4. The locking mechanism according to claim 3, wherein: The locking portion (220) is provided with an adaptive inclined surface (221) corresponding to the helical surface, and the helical surface and the inclined surface (221) are helical surfaces used in conjunction with each other.

5. The locking mechanism according to claim 1, wherein: The locking mechanism further comprises: The elastic member (400) is configured to provide a pre-tightening force between the locking portion (220) and the anti-reversal locking surface.

6. The locking mechanism according to claim 5, wherein: The locking member (200) further includes a second limiting portion (230), which is provided at an end of the pivoting portion (210) facing away from the locking portion (220).

7. The locking mechanism according to claim 6, wherein: The elastic member (400) is arranged between the second limiting portion (230) and the battery pack (800), and / or the elastic member (400) is arranged between the battery pack (800) and the vehicle beam (700).

8. The locking mechanism according to claim 3, wherein: The fixing seat (100) further includes: A first limiting portion (140) is provided at one end of the negative lift surface (130) away from the climbing surface (120), and the first limiting portion (140) is configured to constrain the locking member (200) to an extreme position of rotation.

9. The locking mechanism according to claim 1, wherein: The locking portion (220) is a fan-shaped structure or a rectangular structure.

10. The locking mechanism according to claim 1, wherein: A high friction material is provided between the battery pack (800) and the vehicle beam (700).

11. The locking mechanism according to claim 1, wherein: A buffer member (500) is provided between the battery pack (800) and the vehicle beam (700), and the buffer member (500) is a buffer material.

12. The locking mechanism according to any one of claims 1 to 8, characterized in that: A driving groove (240) is provided at one end of the locking member (200) facing away from the locking portion (220), and the locking mechanism further comprises: A locking driving member (300) can be inserted into the driving slot (240) to drive the locking member (200) to rotate.

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