Bottom support assembly and battery changing vehicle

Abstract

The utility model relates to the technical field of battery changing, and provides a collet assembly and a battery changing vehicle, the collet assembly comprises a collet main body and a plurality of groups of locking mechanisms, and the plurality of groups of locking mechanisms are arranged around the collet main body at intervals and are suitable for keeping a battery box on the collet main body; each group of locking mechanism comprises a guide main body and a locking part, an accommodating cavity is formed in the guide main body, the locking part comprises a driving element and a swing arm, the swing arm is rotatably arranged in the accommodating cavity, and the driving element is suitable for driving the swing arm to swing so as to lock or unlock the battery box. According to the utility model, the guide main body and the locking part are integrated, and the locking part is positioned in the accommodating cavity formed in the guide main body, so that the space occupied by the guide main body and the locking part can be reduced, and the overall layout of the structure is more compact.

Description

Technical Field

[0001] The utility model relates to the technical field of battery replacement, and in particular to a base support assembly and a battery replacement vehicle. Background Art

[0002] With the promotion of new energy technologies, how to provide power to batteries with low power in a timely and effective manner has become a mainstream issue. In order to effectively solve the above problems, the concept of battery swapping has emerged, which is to separate the vehicle body and the battery, and when the battery is low on power, you can go to the battery swap station to replace it with a fully charged battery.

[0003] In order to reliably lock the battery box for battery replacement on the battery replacement vehicle, the related art uses a locking mechanism to lock the battery box for battery replacement to fix the battery box, or unlock the battery box to facilitate disassembly and replacement of the battery box.

[0004] Although the above-mentioned locking mechanism can realize the locking and unlocking functions of the battery box, in actual use, the locking mechanism needs to cooperate with the guide body to position and lock the battery box. At present, the locking mechanism and the guide body are divided into two independent structural settings, with a large number of components and occupying a large space. Utility Model Content

[0005] The first aspect of the utility model provides a base support assembly to solve the above-mentioned defects in the prior art. The guide body and the locking component are integrated, and the locking component is located in the accommodating cavity of the internal structure of the guide body, which can reduce the space occupied by the guide body and the locking component and make the overall structure more compact.

[0006] A second aspect of the utility model provides a battery-swap vehicle.

[0007] A first aspect of the utility model provides a base support assembly, comprising a base support body and a plurality of locking mechanisms.

[0008] A plurality of groups of locking mechanisms are arranged at intervals around the base body, suitable for keeping the battery box on the base body; each group of the locking mechanisms includes a guide body and a locking component, the interior of the guide body is configured with a receiving cavity, the locking component includes a driving element and a swing arm, the swing arm is rotatably arranged in the receiving cavity, and the driving element is suitable for driving the swing arm to swing, so as to lock or unlock the battery box.

[0009] According to the base support assembly provided by the utility model, the swing arm includes a first arm body and a second arm body, the second arm body is rotatably connected to the guide body, one end of the second arm body is hinged to the driving element, the other end of the second arm body is connected to the first arm body, and is arranged at an angle to the second arm body to limit a clamping groove between the first arm body and the second arm body for clamping the frame of the battery box.

[0010] According to the base support assembly provided by the utility model, the first arm body and the second arm body are arranged perpendicular to each other.

[0011] According to the base support assembly provided by the utility model, a locking inclined surface is provided on the first arm body, and in the locked state, the locking inclined surface contacts the frame line of the battery box.

[0012] According to the base support assembly provided by the utility model, the base support assembly further includes a detection component and a position determination component, wherein the detection component is mounted on at least one of the base support body and the swing arm, and is used to generate a position signal when the swing arm is locked to a target position;

[0013] The position determining component is electrically connected to the detecting component, and is used to receive the position signal and determine whether the battery box is locked in place based on the position signal.

[0014] According to the base support assembly provided by the utility model, the detection component includes any one of a contact position sensor and a proximity position sensor; the position determination component includes any one of a buzzer and a voice player.

[0015] The base support assembly provided by the utility model further comprises a mounting assembly, wherein the mounting assembly is movably connected between the two sets of locking mechanisms arranged back to back.

[0016] According to the base support assembly provided by the utility model, the mounting assembly includes a mounting base and a connecting component, the connecting component is symmetrically arranged on both sides of the mounting base, the connecting component is hinged to the corresponding driving element, and the locking mechanism is hinged to the connecting component.

[0017] According to the base support assembly provided by the utility model, the guide body includes two guide monomers arranged opposite to each other, the accommodating cavity is formed by the two guide monomers arranged at an interval, and the locking component is located between the two guide monomers arranged opposite to each other.

[0018] A second aspect of the utility model provides a battery-swap vehicle, comprising a base assembly as described in any one of the items.

[0019] The bottom bracket assembly provided by the utility model has multiple groups of locking mechanisms arranged at intervals around the bottom bracket body, each group of locking mechanisms includes a guide body and a locking component, the guide body is internally structured with a receiving cavity, the locking component includes a driving element and a swing arm, and the swing arm is rotatably arranged in the receiving cavity. This is equivalent to integrating the guide body and the locking component, the locking component is located in the receiving cavity of the internal structure of the guide body, and the space occupied by the guide body and the locking component is equivalent to the space occupied by the original guide body alone, which can reduce the space occupied by the guide body and the locking component, making the overall layout of the structure more compact.

[0020] In addition, during the assembly process, since the guide body and the locking component are integrated, the guide body and the locking component can be assembled into a combined component first, and then the combined component can be installed on the base body, avoiding the guide body and the locking component being installed separately on the base body, thereby simplifying the assembly process and improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is an axonometric schematic diagram of the base support assembly provided by an embodiment of the utility model.

[0023] Figure 2 It is a top view of the base support assembly provided in an embodiment of the utility model.

[0024] Figure 3 It is a front view of the base support assembly provided by an embodiment of the utility model.

[0025] Figure 4 yes Figure 3 Sectional view along line AA.

[0026] Figure 5 yes Figure 3 Sectional view along line BB.

[0027] Reference numerals:

[0028] 100. Bottom support body;

[0029] 200, locking mechanism; 210, guide body; 211, accommodating chamber; 212, guide monomer; 220, locking component; 221, driving element; 2211, cylinder body; 2212, piston rod; 222, swing arm; 2221, first arm body; 2222, second arm body; 2223, locking inclined surface;

[0030] 300. Detection components;

[0031] 400, mounting assembly; 410, mounting base; 420, connecting component. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the drawings in the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0033] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0034] In the embodiments of the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0035] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means 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 embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described 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.

[0036] Figure 1 It is an axonometric schematic diagram of the base support assembly provided by an embodiment of the utility model. Figure 2 It is a top view of the base support assembly provided in an embodiment of the utility model.

[0037] See also Figure 1 and Figure 2 The embodiment of the utility model provides a bottom bracket assembly, which is arranged on the frame of a battery-swapping vehicle and is used to carry a battery box for battery swapping and keep the battery box on the frame. The bottom bracket assembly includes a bottom bracket body 100 and a plurality of locking mechanisms 200.

[0038] A plurality of locking mechanisms 200 are arranged at intervals around the base body 100, and are used to keep the battery box on the base body 100; each locking mechanism 200 includes a guide body 210 and a locking component 220, the guide body 210 is internally structured with a receiving cavity 211, and the locking component 220 is entirely located in the receiving cavity 211; the locking component 220 includes a driving element 221 and a swing arm 222, and the swing arm 222 is rotatably arranged in the receiving cavity 211, that is, the swing arm 222 can be rotatably connected to the guide body 210 through components such as a pin shaft or a rotating shaft, and the swing arm 222 can also be rotatably connected to the base body 100 through components such as a pin shaft or a rotating shaft, and the driving element 221 is suitable for driving the swing arm 222 to swing, so as to lock or unlock the battery box.

[0039] When the battery box needs to be locked on the base body 100, the battery box is lowered along the guide body 210 until it contacts the surface of the base body 100. The driving element 221 pushes the swing arm 222 to deflect a certain angle, so that the swing arm 222 is clamped on the frame of the battery box, so that the battery box is locked by the swing arm 222. At this time, multiple locking mechanisms are all accommodated in the battery box, and there is no need to set up a special space outside the battery box to accommodate the locking mechanism, which can improve the compactness of the structure.

[0040] When the battery box needs to be unlocked from the base body 100 , the driving element 221 drives the swing arm 222 to deflect in the opposite direction by a certain angle, so that the swing arm 222 is separated from the frame of the battery box, so that the battery box is unlocked.

[0041] In the embodiment of the utility model, multiple groups of locking mechanisms 200 are arranged at intervals around the base body 100, and each group of locking mechanisms 200 includes a guide body 210 and a locking component 220. The guide body 210 provides a guide for the battery box to prevent the battery box from tilting or getting stuck on the base body 100 due to positioning errors and mechanical errors when the battery box is lowered to the base body 100, and cannot be successfully installed on the base body 100. The locking component 220 can keep the battery box on the base body 100.

[0042] The guide body 210 has an accommodating cavity 211 inside, and the locking component 220 is located in the accommodating cavity 211; the locking component 220 includes a driving element 221 and a swing arm 222, and the swing arm 222 is rotatably connected to the guide body 210. This is equivalent to integrating the guide body 210 and the locking component 220, and the locking component 220 is located in the accommodating cavity 211 inside the guide body 210. The space occupied by the guide body 210 and the locking component 220 is equivalent to the space occupied by the original guide body 210 alone, which can reduce the space occupied by the guide body 210 and the locking component 220, making the overall structure layout more compact.

[0043] In other words, the locking mechanism 200 provided in the embodiment of the utility model not only retains the original guiding function of the guiding body 210, but also can implement the locking function when the battery box is accurately positioned, so as to make locking more convenient.

[0044] It can be understood that the bottom bracket assembly provided by the embodiment of the utility model has multiple groups of locking mechanisms 200 arranged at intervals around the bottom bracket body 100, each group of locking mechanisms 200 includes a guide body 210 and a locking component 220, the guide body 210 has an internal structure with a receiving cavity 211, and the locking component 220 is located in the receiving cavity 211; the locking component 220 includes a driving element 221 and a swing arm 222, and the swing arm 222 is rotatably connected to the guide body 210. It is equivalent to integrating the guide body 210 and the locking component 220, the locking component 220 is located in the receiving cavity 211 of the internal structure of the guide body 210, and the space occupied by the guide body 210 and the locking component 220 is equivalent to the space occupied by the original guide body 210, which can reduce the space occupied by the guide body 210 and the locking component 220, making the overall layout of the structure more compact.

[0045] In addition, during the assembly process, since the guide body 210 and the locking component 220 are integrated, the guide body 210 and the locking component 220 can be assembled into a combination component first, and then the combination component can be installed on the base body 100, avoiding the guide body 210 and the locking component 220 being separately installed on the base body 100, so as to simplify the assembly process and improve assembly efficiency.

[0046] Figure 3 It is a front view of the base support assembly provided by an embodiment of the utility model. Figure 4 yes Figure 3 Sectional view along line AA. Figure 5 yes Figure 3 Sectional view along line BB.

[0047] See also Figures 3 to 5In some embodiments of the utility model, the swing arm 222 includes a first arm body 2221 and a second arm body 2222 in the shape of a long strip. The length of the first arm body 2221 is greater than the length of the second arm body 2222. The first arm body 2221 is rotatably connected to the guide body 210. One end of the first arm body 2221 is hinged to the driving element 221. The other end of the first arm body 2221 is connected to the second arm body 2222 and is arranged at an angle to the second arm body 2222 to limit a card slot between the first arm body 2221 and the second arm body 2222.

[0048] When the battery box needs to be locked on the base body 100, the driving element 221 pushes the swing arm 222 to deflect a certain angle, and the frame of the battery box is located in the snap-in groove, so that the first arm 2221 and the second arm 2222 respectively abut against two adjacent surfaces of the frame of the battery box to lock the battery box on the base body 100.

[0049] The first arm 2221 and the second arm 2222 are arranged perpendicular to each other, that is, the angle between the first arm 2221 and the second arm 2222 is 90°. Of course, the angle between the first arm 2221 and the second arm 2222 can be greater than 90° or less than 90°.

[0050] When the angle between the first arm 2221 and the second arm 2222 increases, or when the angle between the first arm 2221 and the second arm 2222 decreases, the stroke of the driving element 221 can be appropriately adjusted so that the first arm 2221 and the second arm 2222 can cooperate to limit the frame of the battery box, thereby locking the battery box on the base body 100.

[0051] In some embodiments of the present invention, a locking inclined surface 2223 is provided on the first arm 2221 to make line contact between the first arm 2221 and the frame of the battery box, thereby improving the locking effect.

[0052] The inclination angle and shape of the locking slope 2223 are determined according to the frame of the battery box to ensure that the locking slope 2223 can cooperate with the frame of the battery box to achieve good limiting and locking effects.

[0053] In order to further improve the matching effect between the locking bevel 2223 and the frame of the battery box, protrusions or grooves can be arranged at intervals on the locking bevel 2223 to increase the friction between the locking bevel 2223 and the frame of the battery box, thereby improving the limiting effect between the locking bevel 2223 and the frame of the battery box.

[0054] Continue reading Figure 1 and Figure 2In some embodiments of the present invention, the base assembly further includes a detection component 300 and a position determination component (not shown in the figure), and the detection component 300 is installed on at least one of the base body 100 and the swing arm 222, and is used to generate a position signal when the swing arm 222 is locked to a target position. The target position can be understood as the position where the battery box is completely installed on the base body 100.

[0055] In other words, the detection component 300 can be disposed on the base body 100 through a mounting plate or other components, and is located on the moving path of the swing arm 222, and is used to generate a position signal when the swing arm 222 is locked to the target position. The detection component 300 can also be disposed on the swing arm 222, and is used to generate a position signal when the swing arm 222 is locked to the target position.

[0056] In addition, the detection component 300 can also be arranged on the base body 100 and the swing arm 222 at the same time, and is used to generate a position signal when the swing arm 222 is locked in a target position. The target position can be the position of the swing arm 222 when the battery box is locked in place.

[0057] The position determination component is electrically connected to the detection component 300, and is used to receive the position signal and determine that the battery box is locked in place based on the position signal. The position determination component can be a component such as a buzzer or a voice player. For example, when the position determination component is a buzzer, after the buzzer receives the position signal generated by the detection component 300, it emits a sound such as "beep" to prompt the user that the battery box is locked in place.

[0058] In addition, the position determination component can also be electrically connected to a control device, which is used to receive the position signal detected by the detection component 300 and issue a control instruction based on the position signal. The control device includes but is not limited to a PLC controller, a single chip microcomputer, a CPU, an MCU and other controllers.

[0059] The base support assembly provided by the embodiment of the utility model, by setting a detection component 300 and a position determining component, enables the detection component 300 to detect the position signal of the swing arm 222, and receives the position signal detected by the detection component 300 through the position determining component, and determines whether the battery box is installed in place based on the position signal, so as to improve the accuracy of battery replacement.

[0060] The detection component 300 may be a position sensor, which may be any one of a contact sensor and a proximity sensor. The detection component 300 detects the position of the swing arm 222, and converts the detected position signal into an output signal and feeds it back to the position determination component or the control device, and the position determination component prompts the staff to make adaptive adjustments.

[0061] When the detection component 300 is a contact sensor, the contact sensor may include a travel switch, a two-dimensional matrix position sensor, etc. In the case where the contact sensor is a travel switch, the detection component 300 may be disposed on the guide body 210 and located on the motion path of the swing arm 222 or the driving element 221. When the swing arm 222 or the driving element 221 hits the travel switch, the contact of the travel switch moves, thereby realizing the detection of the position signal.

[0062] When the detection component 300 is a proximity sensor, the proximity sensor may include an electromagnetic type, a photoelectric type, a differential transformer type, an eddy current type, a capacitive type, a reed switch or a Hall type, etc. The proximity sensor does not need to be in direct contact with the swing arm 222 or the driving element 221. When the swing arm 222 or the driving element 221 approaches the proximity sensor to a set distance, a switch sends an "action" signal, thereby realizing the detection of the position signal.

[0063] When the detection component 300 is a laser beam sensor, the laser beam sensor includes a transmitter and a receiver. The receiver can be installed on the guide body 210 through bolts, screws and other fasteners, and the transmitter can be installed on the swing arm 222 or the driving element 221 through bolts, screws and other fasteners. When the swing arm 222 moves to the locking position, the laser beam emitted by the transmitter of the laser beam sensor as the swing arm 222 moves is received by the receiver, and the laser beam sensor generates a position signal, indicating that the battery box is locked in place; if the laser beam emitted by the transmitter as the swing arm 222 moves is not received by the receiver, the laser beam sensor does not generate a position signal, indicating that the battery box is not installed in place.

[0064] The use of a laser beam sensor can not only detect whether the battery box is installed in place, but also detect whether the swing arm 222 is tilted, so as to prevent the battery box lock from failing, because a position signal can only be generated when the transmitting end and the receiving end are in a relative position.

[0065] In addition, the receiving end can also be installed on the swing arm 222 through bolts, screws and other fasteners, and the transmitting end can be installed on the guide body 210 through bolts, screws and other fasteners.

[0066] See also Figures 1 to 5 In some embodiments of the utility model, the base body 100 may also be provided with a detection component and a position determining component at the unlocking position. The detection component has the same structure and detection principle as the detection component 300 provided at the locking position, and the position determining component has the same structure and setting principle as the position determining component provided at the locking position.

[0067] When the driving element 221 drives the swing arm 222 to retract, and the detection component (such as a proximity sensor) does not detect a stable signal, it is determined that the guide body 210 has been unlocked. This process can further improve the accuracy of battery replacement and the success rate of locking the battery locking mechanism 200.

[0068] Continue reading Figure 1 and Figure 2 In some embodiments of the present invention, the base assembly further includes a mounting assembly 400, and the mounting assembly 400 is movably connected between two sets of locking mechanisms 200 disposed back to back.

[0069] When the driving element 221 drives the swing arm 222 to swing and lock the battery box, the installation component 400 is tensioned by the two sets of locking mechanisms 200 arranged opposite to each other. At this time, the installation component 400 can ensure the synchronization of the two sets of locking mechanisms 200 arranged back to back.

[0070] When the driving element 221 drives the swing arm 222 to swing and unlock the battery box, the two locking mechanisms 200 arranged back to back approach each other to put the installation assembly 400 in a relaxed state.

[0071] Specifically, the mounting assembly 400 includes a mounting base 410 and a connecting component 420 , the connecting components 420 are symmetrically arranged on both sides of the connecting component 420 , the connecting component 420 is hinged to the corresponding driving element 221 , and the locking mechanism 200 is hinged to the connecting component 420 .

[0072] Continue reading Figures 1 to 5 In some embodiments of the present invention, the guide body 210 includes two guide monomers 212 arranged opposite to each other, the accommodating cavity 211 is formed by the two guide monomers 212 arranged at intervals, and the locking component 220 is located between the two guide monomers 212 arranged opposite to each other.

[0073] Of course, the guide body 210 can also be integrally formed, and then the accommodating cavity 211 is provided near the middle of the guide body 210 .

[0074] The base support assembly provided by the embodiment of the utility model can reduce the space occupied by the guide body 210 and the locking component 220 by arranging the locking component 220 in the accommodating cavity 211 of the guide body 210, so as to make the overall structure more compact.

[0075] Continue reading Figures 1 to 5In some embodiments of the present invention, the driving element 221 may be a linear driving component such as an electric cylinder, an electric push rod, an oil cylinder or a pneumatic cylinder. When the driving element 221 is an electric cylinder or an oil cylinder, the driving element 221 includes a cylinder body 2211 and a piston rod 2212, the piston rod 2212 is telescopically arranged on the cylinder body 2211, the cylinder body 2211 is hinged on the connecting component 420, and the piston rod 2212 is hinged to the swing arm 222.

[0076] Continue reading Figure 4 and Figure 5 In the base support assembly provided by the embodiment of the utility model, when the battery box is placed on the base support body 100 and the guide body 210 accurately positions the battery box, the piston rod 2212 of the driving element 221 is retracted, and the piston rod 2212 drives the swing arm 222 to swing, so that the first arm body 2221 and the second arm body 2222 of the swing arm 222 abut against the frame of the battery box until the driving element 221 reaches the preset stroke and the detection component 300 detects a stable signal, it is considered that the battery box is locked in place.

[0077] When the battery box needs to be removed from the base body 100, the piston rod 2212 of the driving element 221 extends, and the piston rod 2212 drives the swing arm 222 to swing, so that the first arm 2221 and the second arm 2222 of the swing arm 222 are away from the frame of the battery box, until the battery box is determined to be unlocked in place. There are several ways to determine that the battery box is unlocked in place, and the battery box can be determined to be unlocked in place according to one or more of the following.

[0078] The first method: the battery box is determined to be unlocked in place when the driving element 221 reaches a preset stroke, for example, the driving element 221 has a maximum stroke and a minimum stroke. Accordingly, when the driving element 221 is detected to be at the maximum stroke, the battery box is determined to be unlocked in place, and when the driving element 221 is detected to be at the minimum stroke, the battery box is determined to be locked in place.

[0079] The second method: when the detection component 300 detects a stable signal, it is determined that the battery box is unlocked in place.

[0080] The third method: when the swing arm 222 abuts against the cross beam of the base body 100 and forms a mechanical limit point Q with the cross beam of the base body 100, the driving element 221 reaches a certain torque, the control circuit current of the driving element 221 is overloaded, and the power supply of the driving element 221 is disconnected, it is considered that the battery box is locked in place.

[0081] The utility model also provides a battery-swap vehicle, which includes an electric car, an engineering vehicle or engineering machinery, such as a heavy truck, a repair vehicle, a forklift, an excavator, a crane, a bulldozer, a road roller, a paver, etc. The battery-swap vehicle includes a frame and a base support assembly of any of the above items, and the base support assembly is arranged on the frame for locking the battery box.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. A bottom bracket assembly, characterized in that: include: Bottom support body; A plurality of locking mechanisms are arranged at intervals around the base body, suitable for keeping the battery box on the base body; each locking mechanism comprises a guide body and a locking component, the guide body is internally configured with a receiving cavity, the locking component comprises a driving element and a swing arm, the swing arm is rotatably arranged in the receiving cavity, and the driving element is suitable for driving the swing arm to swing, so as to lock or unlock the battery box.

2. The bottom bracket assembly according to claim 1, characterized in that: The swing arm includes a first arm body and a second arm body, the first arm body is rotatably connected to the guide body, one end of the first arm body is hinged to the driving element, the other end of the first arm body is connected to the second arm body, and the first arm body and the second arm body are arranged at an angle to each other so as to limit a clamping groove between the first arm body and the second arm body for clamping the frame of the battery box.

3. The bottom bracket assembly according to claim 2, characterized in that: The first arm body and the second arm body are arranged perpendicular to each other.

4. The bottom bracket assembly according to claim 3, characterized in that: The first arm body is provided with a locking inclined surface, and in the locked state, the locking inclined surface contacts the frame line of the battery box.

5. The bottom bracket assembly according to claim 1, characterized in that: The base support assembly further includes a detection component and a position determination component, wherein the detection component is mounted on at least one of the base support body and the swing arm, and is used to generate a position signal when the swing arm is locked to a target position; The position determining component is electrically connected to the detecting component, and is used to receive the position signal and determine that the battery box is locked in place based on the position signal.

6. The bottom bracket assembly according to claim 5, characterized in that: The detection component includes any one of a contact position sensor and a proximity position sensor; The position determining component includes any one of a buzzer and a voice player.

7. The base assembly according to any one of claims 1 to 6, characterized in that: It also includes a mounting assembly, which is movably connected between two groups of locking mechanisms arranged back to back.

8. The base assembly according to claim 7, characterized in that: The mounting assembly comprises a mounting base and a connecting component, wherein the connecting component is symmetrically arranged on both sides of the mounting base, the connecting component is hinged to the corresponding driving element, and the locking mechanism is hinged to the connecting component.

9. The base assembly according to any one of claims 1 to 6, characterized in that: The guide body comprises two guide monomers arranged opposite to each other, the accommodating cavity is formed by the two guide monomers arranged at an interval, and the locking component is located between the two guide monomers arranged opposite to each other.

10. A battery-swap vehicle, characterized in that: The invention comprises the base support assembly according to any one of claims 1 to 9.

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