Battery box locking mechanism and vehicle

Abstract

The utility model discloses a kind of battery box locking mechanism and vehicle, battery box locking mechanism includes telescopic drive, connecting rod structure and lock tongue, telescopic drive is used to drive connecting rod structure movement, connecting rod structure movement drives lock tongue to slide towards or away from locking piece;Connecting rod structure includes the main driving link member and follow-up link member connected, the main driving link member is connected with output shaft in telescopic drive, follow-up link member is connected with lock tongue;Battery box locking mechanism has locking state and unlocking state, in locking state, the main driving link member is perpendicular with follow-up link member, follow-up link member is parallel with output shaft, lock tongue is pressed locking piece, in unlocking state, lock tongue avoids locking piece.In the utility model embodiment, when battery box locking mechanism is in locking state, connecting rod structure is in dead point position, can effectively prevent lock tongue retracting due to external force impact, to effectively prevent locking failure.

Description

Technical Field

[0001] This utility model relates to the field of vehicle technology, and in particular to a battery box locking mechanism and a vehicle. Background Technology

[0002] For new energy vehicles that adopt the battery swapping mode, they are equipped with replaceable battery boxes, which are usually locked by a locking mechanism.

[0003] In related technologies, the side-mounted locking mechanism includes a locking tongue. By driving the extension or retraction of the locking tongue, the locking tongue engages with or disengages from the locking block, thereby locking or unlocking the battery box.

[0004] However, the locking tongue in the aforementioned locking mechanism is at risk of retracting under strong impact, which could easily lead to locking failure. Utility Model Content

[0005] This utility model provides a battery box locking mechanism and a vehicle, aiming to at least solve the technical problem in the prior art where the locking tongue in the locking mechanism is at risk of retraction under strong impact, which can easily lead to locking failure.

[0006] In a first aspect, this utility model provides a battery box locking mechanism, including a telescopic drive member, a connecting rod structure and a locking tongue. The telescopic drive member is used to drive the connecting rod structure to move, and the movement of the connecting rod structure causes the locking tongue to slide toward or away from the locking member.

[0007] The linkage structure includes a connected active linkage component and a follower linkage component. The active linkage component is connected to the output shaft in the telescopic drive component, and the follower linkage component is connected to the locking tongue.

[0008] The battery box locking mechanism has a locked state and an unlocked state. In the locked state, the active linkage component is perpendicular to the follower linkage component, the follower linkage component is parallel to the output shaft, and the locking tongue presses against the locking member. In the unlocked state, the locking tongue avoids the locking member.

[0009] Optionally, the follower linkage component includes a linkage group, the linkage group includes two hinged first linkages, the battery box locking mechanism further includes a base and a push plate that can slide relative to the base, the locking tongue is connected to the push plate, and the two ends of the linkage group are respectively hinged to the push plate and the base;

[0010] The active linkage component includes a second linkage and a third linkage. One end of the second linkage is hinged to the third linkage, and the other end is hinged to the hinge joint of the two first linkages in the linkage group. The third linkage is connected to the output shaft in the telescopic drive component and moves with the output shaft.

[0011] In the locked state, both first links in the linkage group are perpendicular to the second link, and both first links in the linkage group are parallel and parallel to the output shaft.

[0012] Optionally, the number of the link groups is two, and the two link groups are arranged symmetrically;

[0013] There are two second links, and the two second links are symmetrically arranged. The two second links are respectively hinged to the two link groups.

[0014] Optionally, the latch has a first locking slope, which is inclined along the sliding direction of the latch and is used to abut against the second locking slope of the locking member.

[0015] Optionally, the inclination angle of the first locking ramp is less than or equal to 6°.

[0016] Optionally, the base is provided with a guide shaft, the push plate has a through hole, the guide shaft passes through the through hole, the push plate is slidably connected to the guide shaft through the through hole, and the guide shaft is used to limit the sliding direction of the push plate.

[0017] Optionally, the inner wall of the through hole is provided with a first graphite copper sleeve or a first linear bearing, the first graphite copper sleeve or the first linear bearing being located between the through hole and the guide shaft.

[0018] Optionally, the base is provided with a guide hole, through which the locking tongue passes, and the guide hole is used to limit the sliding direction of the locking tongue.

[0019] Optionally, the inner wall of the guide hole is provided with a second graphite copper sleeve or a second linear bearing, the second graphite copper sleeve or the second linear bearing being located between the locking tongue and the guide hole.

[0020] Secondly, this utility model provides a vehicle, including a battery box and a battery box locking mechanism as described above, wherein the battery box includes a locking element.

[0021] In this embodiment of the invention, when the battery box locking mechanism is in the locked state, the latch presses against the locking member. In the linkage structure, the active linkage member and the follower linkage member are perpendicular, and the follower linkage member is parallel to the output shaft. The linkage structure is in a dead-point position. At this time, even if subjected to external impact, the battery box locking mechanism can still maintain the locked state, effectively preventing the latch from retracting due to external impact, thereby effectively preventing locking failure. Furthermore, the telescopic drive member transmits force to the latch through the linkage structure, which amplifies the force, thereby increasing the locking force of the battery box locking mechanism. Additionally, the battery box locking mechanism uses a method of driving the latch to extend or retract horizontally to lock or unlock the battery box. The battery box locking mechanism has a small dimension along its height, which is beneficial for its layout.

[0022] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model, it can be implemented according to the contents of the specification. In order to make the above and other objects, features and advantages of this utility model more obvious and easy to understand, the following are specific embodiments of this utility model. Attached Figure Description

[0023] Figure 1 A three-dimensional schematic diagram of the battery box locking mechanism provided in an embodiment of this utility model;

[0024] Figure 2 An exploded view of the battery box locking mechanism provided in an embodiment of this utility model;

[0025] Figure 3 A side view of the battery box locking mechanism in the locked state according to an embodiment of the present utility model;

[0026] Figure 4 A top view of the battery box locking mechanism in the locked state according to an embodiment of the present utility model;

[0027] Figure 5 A side view of the battery box locking mechanism in the unlocked state, provided in an embodiment of this utility model;

[0028] Figure 6 This is a top view of the battery box locking mechanism provided in the embodiment of the present invention in the unlocked state.

[0029] Figure label:

[0030] 1-Telescopic drive component, 11-Output shaft, 2-Linkage structure, 21-Active linkage component, 211-Second linkage, 212-Third linkage, 22-Follower linkage component, 221-First linkage, 23-Pin, 24-First snap ring, 3-Lock tongue, 31-First locking bevel, 4-Push plate, 41-Through hole, 5-Base, 51-First vertical plate, 511-Guide hole, 52-Second vertical plate, 521-Allowing hole, 53-Third vertical plate, 54-Base plate, 6-Guide shaft, 7-Fastener, 8-Second snap ring, 9-Locking component, 91-Second locking bevel, 10-Box frame. Detailed Implementation

[0031] Exemplary embodiments of the present invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0032] In related technologies, side-mounted locking mechanisms include a locking tongue. By driving the locking tongue to extend or retract, the locking tongue engages with or disengages from the locking block, thereby locking or unlocking the battery box. However, the locking tongue in the aforementioned locking mechanism is at risk of retraction under strong impact, which can easily lead to locking failure. To solve the above problems, this utility model provides a battery box locking mechanism and a vehicle, which are described in detail below.

[0033] Firstly, referring to Figures 1 to 6 This utility model provides a battery box locking mechanism, including a telescopic drive member 1, a connecting rod structure 2, and a locking tongue 3. The telescopic drive member 1 drives the connecting rod structure 2 to move, and the movement of the connecting rod structure 2 causes the locking tongue 3 to slide toward or away from the locking member 9. The connecting rod structure 2 includes a connected active connecting rod member 21 and a follower connecting rod member 22. The active connecting rod member 21 is connected to the output shaft 11 in the telescopic drive member 1, and the follower connecting rod member 22 is connected to the locking tongue 3. The battery box locking mechanism has a locked state and an unlocked state. In the locked state, the active connecting rod member 21 and the follower connecting rod member 22 are perpendicular to each other, and the follower connecting rod member 22 is parallel to the output shaft 11. The locking tongue 3 presses against the locking member 9. In the unlocked state, the locking tongue 3 avoids the locking member 9.

[0034] The battery box locking mechanism is mounted on the vehicle's frame. The vehicle includes a battery box, and the locking mechanism secures the battery box to the frame. This vehicle is a new energy vehicle using a battery swapping system. When the battery box's charge is low, it needs to be removed from the vehicle and replaced with a fully charged one; that is, the battery box needs to be frequently removed and placed. During normal driving and use, the battery box locking mechanism is in the locked state, and the locking reliability must be ensured. When replacing the battery box, the battery box locking mechanism is in the unlocked state to allow the battery box to be removed from the vehicle.

[0035] The battery box includes a locking element 9 and a box frame 10, with the locking element 9 connected to the box frame 10. The connection between the locking element 9 and the box frame 10 can be detachable, for example, by bolts. In the locked state, the locking tongue 3 presses firmly against the upper surface of the locking element 9, achieving Z-axis limiting of the battery box, i.e., locking the battery box. The Z-axis of the battery box is also its height direction, and the height direction of the battery box locking mechanism is consistent with the height direction of the battery box. In the locked state, the locking tongue 3 avoids the locking element 9; specifically, along the height direction of the battery box locking mechanism, the orthographic projection of the locking tongue 3 does not overlap with the orthographic projection of the locking element 9.

[0036] The battery box locking mechanism includes a base 5, and a locking tongue 3 that can slide relative to the base 5. The connection between the follower linkage component 22 and the locking tongue 3 can be direct or indirect; for example, the follower linkage component 22 can be connected to the locking tongue 3 via a push plate 4. The connection between the driving linkage component 21 and the output shaft 11 can be detachable, for example, threaded. The sliding direction of the locking tongue 3 can be referenced... Figure 1 and Figure 3 The direction indicated by arrow A. The telescopic drive component 1 includes a telescopic output shaft 11, the telescopic direction of which is consistent with the sliding direction of the locking tongue 3. The telescopic drive component 1 can be a cylinder, a hydraulic cylinder, an electric push rod, etc., and correspondingly, the power source of the telescopic drive component 1 can be on-board compressed air, hydraulic static pressure, on-board power supply, etc. The telescopic drive component 1 is preferably a cylinder, in which case the on-board compressed air provides the power source for the cylinder.

[0037] The telescopic drive component 1 is used to switch the battery box locking mechanism between the locked and unlocked states. During the switch from the unlocked to the locked state, the telescopic drive component 1 operates, its output shaft 11 extends towards the locking component 9, driving the connecting rod structure 2 to move. The movement of the connecting rod structure 2 causes the locking tongue 3 to slide towards the locking component 9. During the switch from the locked to the unlocked state, the telescopic drive component 1 operates, its output shaft 11 retracts away from the locking component 9, driving the connecting rod structure 2 to move. The movement of the connecting rod structure 2 causes the locking tongue 3 to slide away from the locking component 9.

[0038] In the locked state, the active linkage component 21 and the follower linkage component 22 in the linkage structure are perpendicular, and the linkage structure is at its dead point. At this time, the latch 3 reaches its maximum sliding stroke, and even if the output shaft 11 of the telescopic drive component 1 continues to extend, the linkage structure cannot move, and the latch 3 can no longer slide towards the locking component 9. When the battery box locking mechanism switches from the locked state to the unlocked state, the output shaft 11 of the telescopic drive component 1 retracts in the opposite direction, thus releasing the dead point.

[0039] In this embodiment, when the battery box locking mechanism is in the locked state, the latch 3 presses against the locking member 9. In the linkage structure, the active linkage member 21 and the follower linkage member 22 are perpendicular, and the follower linkage member 22 is parallel to the output shaft 11. The linkage structure is in a dead position. At this time, even if subjected to external force impact, the battery box locking mechanism can still maintain the locked state, effectively preventing the latch 3 from retracting due to external force impact, thereby effectively preventing locking failure. In addition, the telescopic drive member 1 transmits force to the latch 3 through the linkage structure, which can amplify the force, thereby improving the locking force of the battery box locking mechanism. Furthermore, the battery box locking mechanism uses the method of driving the latch 3 to extend or retract horizontally to lock or unlock the battery box. The battery box locking mechanism has a small dimension along the height direction, which is beneficial for the layout of the battery box locking mechanism.

[0040] In some embodiments, refer to Figure 2 , Figure 4 and Figure 6 The follower linkage component 22 includes a linkage group, which includes two hinged first linkages 221. The battery box locking mechanism also includes a base 5 and a push plate 4 that can slide relative to the base 5. The locking tongue 3 is connected to the push plate 4. The two ends of the linkage group are hinged to the push plate 4 and the base 5, respectively. The active linkage component 21 includes a second linkage 211 and a third linkage 212. One end of the second linkage 211 is hinged to the third linkage 212, and the other end is hinged to the hinge point of the two first linkages 221 in the linkage group. The third linkage 212 is connected to the output shaft in the telescopic drive component 1 and moves with the output shaft. In the locked state, the two first linkages 221 in the linkage group are perpendicular to the second linkage 211, and the two first linkages 221 in the linkage group are parallel to each other and are also parallel to the output shaft 11.

[0041] The locking tongue 3 is connected to the push plate 4, and the sliding of the push plate 4 causes the locking tongue 3 to slide. The connection between the locking tongue 3 and the push plate 4 can be a detachable connection, such as a threaded connection. The two ends of the linkage group are respectively the end of one of the first linkages 221 away from the hinge point of the two first linkages 221 and the end of the other first linkage 221 away from the hinge point of the two first linkages 221. The base 5 includes a base plate 54 and a second vertical plate 52 disposed on the base plate 54, and one of the first linkages 221 in the linkage group of the second vertical plate 52 is hinged.

[0042] The second vertical plate 52 has a clearance hole 521 that penetrates through it. The clearance hole 521 is used to allow clearance between the end of the active connecting rod component 21 that is away from the push plate 4 and the output shaft 11. The hinge between the connecting rods can be achieved using a pin 23. One end of the pin 23 has a stepped portion, and the other end has a first retaining spring 24 to achieve axial positioning of the pin 23. The base 5 also includes a third vertical plate 53 mounted on the base plate 54. The third vertical plate 53 is detachably connected to the telescopic drive component 1, for example, via a fastener 7, which can be a bolt.

[0043] In the locked state, the first link 221, hinged to the push plate 4, is perpendicular to the push plate 4; the first link 221, hinged to the second vertical plate 52, is perpendicular to the second vertical plate 52; and the third link 212 is parallel to the output shaft 11 and perpendicular to the second link 211. In the unlocked state, the included angle between the two first links 221 in the linkage group is an acute angle. In this embodiment, the follower link component 22 and the active link component 21 have simple structures, and the battery box locking mechanism has a simple structure and a low failure rate.

[0044] In some embodiments, refer to Figure 2 , Figure 4 and Figure 6 The number of linkage groups is two, and the two linkage groups are symmetrically arranged; the number of second linkages 211 is two, and the two second linkages 211 are symmetrically arranged, and the two second linkages 211 are respectively hinged to the two linkage groups. In this embodiment, the active linkage component 21 includes two linkage groups, which are located on both sides of the battery box locking mechanism along its width direction. The above linkage structure enables the push plate 4 to be subjected to more balanced forces; and the linkage structure can withstand greater forces, allowing the use of a stronger power source to provide power to the telescopic drive component 1, so as to output a greater locking force.

[0045] In some embodiments, refer to Figure 3 and Figure 5 The locking tongue 3 has a first locking slope 31, which is inclined along the sliding direction of the locking tongue 3. The first locking slope 31 is used to abut against the second locking slope 91 of the locking member 9.

[0046] During the process of switching the battery box locking mechanism from the unlocked state to the locked state, the first locking slope 31 of the locking tongue 3 begins to contact the second locking slope 91 of the locking member 9. Then, the locking tongue 3 continues to slide towards the locking member 9, and the first locking slope 31 of the locking tongue 3 gradually presses against the locking member 9 until the telescopic drive member 1 stops operating. At this point, the locking tongue 3 is in a locked position. Figure 3 At the position shown, the first locking ramp 31 of the latch 3 is fully pressed against the locking member 9.

[0047] The first locking ramp 31 and the second locking ramp 91 form a ramp abutment, which can convert the horizontal thrust transmitted from the telescopic drive member 1 to the latch 3 through the linkage structure into a clamping force perpendicular to the second locking ramp 91. Furthermore, the inclination angles of the first locking ramp 31 and the second locking ramp 91 are small, creating a wedge-shaped force amplification effect. In this embodiment, the telescopic drive member 1 transmits force to the latch 3 through the linkage structure, and the latch 3 forms a ramp abutment with the second locking ramp 91 of the locking member 9 through the first locking ramp 31. This achieves a two-stage force amplification effect: linkage structure force amplification and wedge-shaped force amplification. This improves the locking force of the battery box locking mechanism and avoids the risk of Z-axis jump and loosening after clamping. Additionally, the contact area between the first locking ramp 31 and the second locking ramp 91 is large, resulting in more stable locking between the latch 3 and the locking member 9.

[0048] In some embodiments, the inclination angle of the first locking ramp 31 is less than or equal to 6°. Preferably, the inclination angle of the first locking ramp 31 is 6°. In this embodiment, the inclination angle of the first locking ramp 31 is less than or equal to 6°, which is less than the friction angle between the locking tongue 3 and the locking member 9, thereby achieving a self-locking effect and preventing locking failure under long-term vibration.

[0049] In some embodiments, refer to Figure 2 The base 5 is provided with a guide shaft 6, and the push plate 4 is provided with a through hole 41. The guide shaft 6 passes through the through hole 41, and the push plate 4 is slidably connected to the guide shaft 6 through the through hole 41. The guide shaft 6 is used to limit the sliding direction of the push plate 4.

[0050] In this embodiment, the push plate 4 is slidably connected to the guide shaft 6, which is mounted on the base 5, allowing the push plate 4 to slide relative to the base 5. The sliding direction of the push plate 4 is consistent with the sliding direction of the latch 3. The through hole 41 is a circular hole penetrating the push plate 4. The number of through holes 41 is equal to the number of guide shafts 6, which can be one, two, three, etc. The base 5 also includes a first vertical plate 51 mounted on the base plate 54. The guide shaft 6 is connected to the first vertical plate 51 and a second vertical plate 52. One end of the guide shaft 6 has a stepped section, and the other end has a second retaining spring 8 to achieve axial positioning of the guide shaft 6. In this embodiment, the guide shaft 6 serves both to slidably connect the push plate 4 and to limit the sliding direction of the push plate 4.

[0051] In some embodiments, the inner wall of the through hole 41 is provided with a first graphite copper sleeve or a first linear bearing, which is located between the through hole 41 and the guide shaft 6.

[0052] When the locking tongue 3 has a first locking slope 31, the locking force of the battery box locking mechanism is affected by friction. Reducing friction can improve the locking force. In this embodiment, by setting a first graphite copper sleeve or a first linear bearing, the friction of the push plate 4 during sliding can be reduced, thereby improving the locking force of the battery box locking mechanism.

[0053] In some embodiments, refer to Figure 2 The base 5 has a guide hole 511, through which the locking tongue 3 passes. The guide hole 511 is used to limit the sliding direction of the locking tongue 3. The guide hole 511 is formed on the first vertical plate 51 and is a circular hole that passes through the first vertical plate 51.

[0054] In some embodiments, the inner wall of the guide hole 511 is provided with a second graphite copper sleeve or a second linear bearing, which is located between the locking tongue 3 and the guide hole 511. By providing the second graphite copper sleeve or the second linear bearing, the frictional force when the locking tongue 3 slides can be reduced, thereby improving the locking force of the battery box locking mechanism.

[0055] The process of switching the battery box locking mechanism from the unlocked state to the locked state is as follows: the telescopic drive 1 runs, the output shaft 11 of the telescopic drive 1 extends toward the locking member 9, driving the linkage structure 2 to move, the linkage structure 2 moves and drives the push plate 4 to slide along the guide shaft 6 toward the locking member 9, the push plate 4 slides and drives the lock tongue 3 to slide along the guide hole 511 toward the locking member 9, until the telescopic drive 1 stops running and the push plate 4 and lock tongue 3 no longer slide.

[0056] The process of switching the battery box locking mechanism from the locked state to the unlocked state is as follows: The telescopic drive 1 operates, the output shaft 11 of the telescopic drive 1 retracts away from the locking member 9, driving the linkage structure 2 to move. The movement of the linkage structure 2 causes the push plate 4 to slide along the guide shaft 6 away from the locking member 9. The sliding of the push plate 4 causes the locking tongue 3 to slide along the guide hole 511 away from the locking member 9, until the telescopic drive 1 stops operating, and the push plate 4 and locking tongue 3 no longer slide. When the battery box locking mechanism is in the unlocked state, the output shaft 11 can be fully retracted.

[0057] Secondly, the present invention provides a vehicle including a battery box and at least one battery box locking mechanism provided in the first aspect, the battery box including a locking element 9.

[0058] This vehicle is a new energy vehicle that uses a battery swapping system, such as an electric heavy-duty truck. The battery box can be located under the cargo box, on both sides of the main longitudinal beams of the frame along the width of the vehicle, or it can be located behind the driver's cab.

[0059] The vehicle also includes a frame, on which at least one battery box locking mechanism is mounted. The number of battery box locking mechanisms in the vehicle can be set according to actual needs, such as two, three, four, six, eight, etc. The battery box also includes a housing frame 10, to which a locking element 9 is connected. The connection between the locking element 9 and the housing frame 10 can be detachable, for example, by bolts.

[0060] In some embodiments, the frame further includes a support base for supporting the battery box. An elastic pad may be provided between the box frame 10 and the support base. The elastic pad has a certain deformation capacity and may be made of rubber.

[0061] In related technologies, if the flatness of the locking contact surface is poor, the locking tongue may not be able to extend properly onto the locking block; for example, interference may occur during the extension process. In this embodiment, the elastic pad can compensate for the fitting deviation caused by the flatness error between the first locking slope 31 and the second locking slope 91 to a certain extent, reducing the flatness requirements of the first locking slope 31 and the second locking slope 91. Even if there is a certain error in the flatness of the first locking slope 31 and the second locking slope 91, the locking tongue 3 can still extend normally onto the locking member 9. In addition, the requirements for the flatness and positioning accuracy of the bottom surface of the housing frame 10 are not high, which can reduce the processing difficulty of the bottom of the housing frame 10.

[0062] Since the vehicle includes the aforementioned battery box locking mechanism, it also possesses the beneficial effects of the aforementioned battery box locking mechanism, which will not be elaborated upon here.

[0063] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0064] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A battery box locking mechanism, characterized in that, It includes a telescopic drive component, a linkage structure, and a locking tongue. The telescopic drive component is used to drive the linkage structure to move, and the movement of the linkage structure causes the locking tongue to slide toward or away from the locking component. The linkage structure includes a connected active linkage component and a follower linkage component. The active linkage component is connected to the output shaft of the telescopic drive component, and the follower linkage component is connected to the locking tongue. The battery box locking mechanism has a locked state and an unlocked state. In the locked state, the active linkage component is perpendicular to the follower linkage component, the follower linkage component is parallel to the output shaft, and the locking tongue presses against the locking member. In the unlocked state, the locking tongue avoids the locking member.

2. The battery box locking mechanism according to claim 1, characterized in that, The follower linkage component includes a linkage group, the linkage group includes two hinged first linkages, the battery box locking mechanism also includes a base and a push plate that can slide relative to the base, the locking tongue is connected to the push plate, and the two ends of the linkage group are respectively hinged to the push plate and the base; The active linkage component includes a second linkage and a third linkage. One end of the second linkage is hinged to the third linkage, and the other end is hinged to the hinge joint of the two first linkages in the linkage group. The third linkage is connected to the output shaft and moves with the output shaft. In the locked state, both first links in the linkage group are perpendicular to the second link, and both first links in the linkage group are parallel and parallel to the output shaft.

3. The battery box locking mechanism according to claim 2, characterized in that, The number of the link groups is two, and the two link groups are arranged symmetrically. There are two second links, and the two second links are symmetrically arranged. The two second links are respectively hinged to the two link groups.

4. The battery box locking mechanism according to any one of claims 1 to 3, characterized in that, The latch has a first locking slope, which is inclined along the sliding direction of the latch and is used to abut against the second locking slope of the locking member.

5. The battery box locking mechanism according to claim 4, characterized in that, The inclination angle of the first locking ramp is less than or equal to 6°.

6. The battery box locking mechanism according to claim 2, characterized in that, The base is provided with a guide shaft, and the push plate has a through hole. The guide shaft passes through the through hole, and the push plate is slidably connected to the guide shaft through the through hole. The guide shaft is used to limit the sliding direction of the push plate.

7. The battery box locking mechanism according to claim 6, characterized in that, The inner wall of the through hole is provided with a first graphite copper sleeve or a first linear bearing, which is located between the through hole and the guide shaft.

8. The battery box locking mechanism according to claim 2, characterized in that, The base has a guide hole through which the locking tongue passes, and the guide hole is used to limit the sliding direction of the locking tongue.

9. The battery box locking mechanism according to claim 8, characterized in that, The inner wall of the guide hole is provided with a second graphite copper sleeve or a second linear bearing, which is located between the locking tongue and the guide hole.

10. A vehicle, characterized in that, It includes a battery box and at least one battery box locking mechanism as described in any one of claims 1 to 9, wherein the battery box includes a locking element.

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