Battery lock and lock method

Abstract

The present application relates to a battery lock and a locking method, which is used to lock a battery box to a vehicle body, and includes: a lock body; a lock head, including a locking member and a connecting member, wherein the locking member is threadedly connected to the connecting member; after the connecting member is engaged with the lock body, the connecting member rotates relative to the locking member, so that the connecting member pulls the lock body to lock the battery box to the vehicle body. In the above-mentioned battery lock and locking method, before locking the battery box, the connecting member and the locking member are connected by threads, and after the lock head is engaged by the first locking member and the second locking member, it is sleeved on the end of the connecting member, and the connecting member is driven to rotate relative to the locking member, so that the lock head and the lock body move toward each other to lock the battery box. In the process of locking the battery box, there is no need to screw in or out after the threads are engaged, so as to avoid the problem of inaccurate thread head position and wear of the threads when the threads are engaged.

Description

Technical Field

[0001] The present invention belongs to the field of electric vehicle battery replacement equipment, and in particular to a battery lock and a locking method. Background Art

[0002] The statements in this section merely provide background information related to the present disclosure and do not necessarily constitute prior art.

[0003] At present, the battery box of an electric vehicle needs to be firmly locked in the load-bearing area of ​​the electric vehicle, and the battery box needs to be unlocked or locked to the electric vehicle conveniently and quickly during automatic battery replacement.

[0004] The existing thread locking mechanism achieves the locking of the battery box by docking and screwing the threads. When the threads are docked and screwed, there may be problems with the thread head position being inaccurate, resulting in thread wear or even sticking, making it impossible to screw normally, resulting in locking failure. Summary of the invention

[0005] In view of the above, it is necessary to provide a battery lock and a locking method, aiming to solve the problem of thread wear of existing battery locks when the threads are connected.

[0006] The present disclosure provides a battery lock for locking a battery box to a vehicle body, comprising:

[0007] Lock body;

[0008] The lock head comprises a locking member and a connecting member, wherein the locking member is threadedly connected to the connecting member;

[0009] After the connecting member is clamped on the lock body, the connecting member rotates relative to the locking member, so that the connecting member pulls the lock body to lock the battery box to the vehicle body.

[0010] Preferably, it further comprises a first locking member and a second locking member, wherein one of the first locking member and the second locking member is connected to the lock body, and the other is connected to the connecting member, and the connecting member is connected to the lock body by the first locking member being clamped to the second locking member.

[0011] Preferably, the first locking member includes a bearing portion and an entry channel; the second locking member includes a locking rod and a first locking tongue protruding in a radial direction of the locking rod;

[0012] When the first locking member and the second locking member move toward each other, the locking rod moves axially along the entry channel until the first locking tongue passes over the bearing surface of the bearing portion, and the connecting member is rotated so that the first locking tongue moves in a circumferential direction relative to the bearing portion until it at least partially overlaps with the bearing surface of the bearing portion in the axial direction so as to clamp the locking rod to the first locking member.

[0013] Preferably, the second locking member further comprises a second locking tongue extending in the radial direction of the locking rod;

[0014] The first locking member further includes a stop portion, and when the second locking tongue abuts against the stop portion, the locking member rotates relative to the connecting member.

[0015] Preferably, the locking member includes a cavity, the side wall of the cavity is provided with an internal thread, the connecting member is provided with an external thread, and the locking member and the connecting member are threadedly connected by meshing the internal thread and the external thread, or, the connecting member includes a cavity, the side wall of the cavity is provided with an internal thread, the outer wall of the locking member is provided with an external thread, and the locking member and the connecting member are threadedly connected by meshing the internal thread and the external thread.

[0016] Preferably, the lock head further comprises a first spring, one end of which abuts against the locking member and extends along the axial direction of the connecting member; when the battery box is locked to the vehicle body, the locking member compresses the first spring under the traction of the connecting member.

[0017] Preferably, the lock body further comprises a driving machine, a rotating member and an origin detection switch, wherein the driving machine is connected to the rotating member, and the rotating member is connected to the first locking member or the second locking member, and is used for driving the connecting member to rotate through the first locking member and the second locking member when the first locking member and the second locking member are engaged under the drive of the driving machine;

[0018] The rotating surface of the rotating member is provided with an opening, and the origin detection switch faces the side surface of the rotating member to detect the origin position of the rotating member through the opening.

[0019] Preferably, the lock body further comprises a lock housing, a support rod, a second spring and a displacement detection switch;

[0020] The lock housing comprises a first shell and a second shell, wherein the first shell is sleeved in the second shell along the axial direction so as to be movably connected to the second shell; the first shell and the second shell have a cavity inside, and the rotating member is rotatably arranged in the cavity;

[0021] One end of the support rod is connected to the second shell, and the other end passes through the first shell and is clamped to the first shell; the second spring is sleeved on the support rod and one end abuts against the first shell, and the other end abuts against the second shell;

[0022] When the locking member moves along the axial direction of the connecting member under the traction of the connecting member to push the second shell, the second shell drives the support rod to move to a preset position to trigger the displacement detection switch.

[0023] A locking method for locking a battery box to a vehicle body comprises the following steps:

[0024] When the lock head and the lock body move toward each other until the connecting piece of the lock head is engaged with the lock body, the connecting piece is driven to rotate relative to the locking piece of the lock head;

[0025] The connecting member pulls the lock body to lock the battery box to the vehicle body.

[0026] Preferably, the connector of the lock head is connected to the lock body by clamping:

[0027] When the first locking member and the second locking member move toward each other, the locking rod of the second locking member moves axially along the entry channel of the first locking member until the first locking tongue of the locking rod passes over the bearing surface of the bearing portion of the first locking member;

[0028] Rotating the connecting member causes the first locking tongue to move toward the bearing portion in a circumferential direction until the first locking tongue at least partially overlaps with the bearing surface of the bearing portion in an axial direction, so that the first locking tongue can abut against the bearing surface to clamp the locking rod to the first locking member; and

[0029] The connecting member pulling the lock body comprises:

[0030] When the second locking tongue of the second locking member abuts against the stopper of the first locking member, the connecting member rotates relative to the locking member, so that the connecting member moves until the first locking tongue abuts against the bearing surface to pull the lock body; wherein one of the first locking member and the second locking member is connected to the connecting member of the lock head, and the other is connected to the lock body, and the connecting member is connected to the lock body by the first locking member being connected to the second locking member.

[0031] Compared with the prior art, the above-mentioned battery lock and locking method, before locking the battery box, the connecting part and the locking part are connected by threads, and after the locking head is clamped by the first locking part and the second locking part, it is sleeved on the end of the connecting part, and the connecting part is driven to rotate relative to the locking part, so that the locking head and the lock body move toward each other to lock the battery box. In the process of locking the battery box, there is no need to screw in or out after thread engagement, which avoids the problem of thread wear due to inaccurate thread head position when the threads are connected and screwed together. The above-mentioned battery lock and locking method can allow larger docking errors, and has a simple structure and low production and maintenance costs.

[0032] Moreover, the above-mentioned battery lock and locking method lock the battery box by driving the connecting member to rotate relative to the locking member. Since the diameter of the connecting member is small, the diameter of the thread of the connecting member and the locking member is also small. The connecting member can be driven to rotate with a smaller torque, thereby reducing the power of the driving motor. This is particularly important for battery locks in situations where space is limited. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 It is a structural diagram of embodiment 1 of the battery lock in the battery replacement system.

[0035] Figure 2 It is a schematic diagram of the structure of a battery lock.

[0036] Figure 3 It is a schematic diagram of the structure of the battery lock in a disassembled state.

[0037] Figure 4 It is a schematic diagram of the structure of the lock.

[0038] Figure 5 It is a schematic diagram of the structure of the lock in the disassembled state.

[0039] Figure 6 It is a schematic structural diagram of a locking rod and a locking member in another embodiment.

[0040] Figure 7 It is a structural diagram of the lock body.

[0041] Figure 8 It is a schematic diagram of the structure of the lock body in a disassembled state.

[0042] Fig. 9 It is a structural diagram of the driving machine and rotating parts.

[0043] Fig.10 It is a schematic diagram of the structure of rotating parts, bearings and driving machines.

[0044] Fig.11 It is a structural schematic diagram of the rotating parts.

[0045] Fig.12 yes Fig.11 Schematic diagram of the cross section at XII-XII.

[0046] Fig.13 It is a structural diagram of embodiment 2 of the battery lock in the battery replacement system.

[0047] Fig.14 It is a structural diagram of embodiment 2 of the battery lock.

[0048] Main component symbols

[0049]

[0050]

[0051] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0052] In order to more clearly understand the above-mentioned purposes, features and advantages of the present disclosure, the following is a detailed description in conjunction with the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present invention, and the embodiments described are only some embodiments of the present disclosure, rather than all embodiments. Based on the disclosed embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art. The terms used in the specification are only for the purpose of describing specific implementations and are not intended to limit the present application.

[0054] In each embodiment, for the convenience of description and not to limit the present disclosure, the term "connection" used in the specification and claims of the present application is not limited to physical or mechanical connection, but may include electrical connection, whether direct or indirect. "Up", "down", "below", "left", "right", etc. are only used to indicate relative position relationship. When the absolute position of the described object changes, the relative position relationship also changes accordingly.

[0055] Example 1

[0056] Taking an electric truck as an example, the battery box 10 is placed on the body of the electric truck. In order to prevent the battery box 10 from moving on the body, a battery lock is needed to lock the battery box 10 to the body. The existing battery lock generally locks the battery box 10 by screwing a screw into a nut. Since the placement position of the battery box 10 on the body may be deviated, the thread head may not be properly docked when the threads are connected, causing the threads to wear during the thread connection process, or even get stuck, making it impossible to screw normally, resulting in a locking failure. To this end, the present application uses a screw to thread the locking member, and then drives the screw connection through the rotating member of the lock body. During the locking process, there is no need for thread connection to screw in and out, thereby avoiding the wear and error problems of thread connection and screw connection. At the same time, since the diameter of the connector is small, the diameter of the thread can also be reduced, which can reduce the resistance during the locking process.

[0057] Figure 1 is a schematic diagram of the structure of the embodiment 1 of the battery lock in the battery replacement system, Figure 2 is a schematic structural diagram of embodiment 1 of the battery lock, Figure 3 This is a schematic diagram of the battery lock in a disassembled state. Figure 1-3 As shown, the battery lock is used to lock the battery box 10 to the vehicle body 11. The battery lock includes a lock head 20 and a lock body 30, and the lock head 20 and the lock body 30 can be clamped together through a first locking member 35 and a second locking member 25. Among them, one of the first locking member 35 and the second locking member 25 is connected to the lock head 20, and the other is connected to the lock body 30. The lock body 30 is clamped to the second locking member 25 through the first locking member 35, so that the lock head 20 and the lock body 30 are clamped together.

[0058] As an example, in the present embodiment, the lock head 20 is installed on the battery box 10, and the lock body 30 is installed on the vehicle body 11. However, the present embodiment is not limited thereto, the lock head 20 may also be connected to the vehicle body 11, and the lock body 30 may also be installed on the battery box 10, and those skilled in the art may set the installation positions of the lock head 20 and the lock body 30 as needed. In addition, the movement of the lock head 20 and the lock body 30 does not affect the structure of the battery lock. Specifically, when the battery box 10 needs to be placed on the vehicle body, the battery box 10 moves downward until the lock head 20 and the lock body 30 are engaged, that is, when the lock body 30 is stationary, the lock head 20 moves toward the lock body 30 until the lock head 20 and the lock body 30 are engaged, so as to lock the battery box 10 to the vehicle body 11, and can prevent the battery box 10 from detaching from the vehicle body 11 or the battery box 10 from shaking. In some other embodiments, the battery box 10 may be lifted up by a battery replacement device, that is, when the lock head 20 is stationary, the lock body 30 moves toward the lock head 20, and the present application does not impose any restrictions on this.

[0059] Figure 4 2 is a schematic diagram of the structure of the lock 20. Figure 5 2 is a schematic diagram of the structure of the lock 20 in a disassembled state. Figure 4 and Figure 5 As shown, the lock head 20 includes a locking member 21 and a connecting member 23 .

[0060] The locking member 21 is generally in the shape of a disk, and includes a threaded hole in the middle region. The threaded hole extends along the axial direction of the locking member 21. Figure 4 and Figure 5 In the illustrated embodiment, the connecting member 23 is generally in the shape of a rod, and a threaded portion is provided at one end thereof. The rotating surface of the threaded portion is provided with an external thread, and the external thread of the threaded portion cooperates with the internal thread of the threaded hole, so that the screw is screwed into the threaded hole through the threaded portion and is threadedly connected to the locking member 21. In this embodiment, the threaded hole of the locking member 21 is a through hole that passes through both ends of the locking member 21, and the end of the connecting member 23 close to the threaded portion is also connected to an end cap 22, which is located on the outside of the locking member 21 and connected to the connecting member 23, and the radial dimension of the end cap 22 is larger than the threaded hole to stop the connecting member 23 and prevent the end of the connecting member 23 close to the threaded portion from coming out of the threaded hole.

[0061] Figure 6 2 is a schematic diagram of the structure of the connecting member 23 and the locking member 21 in another embodiment. Figure 6 In the embodiment shown, the connecting member 23 comprises a cavity, the side wall of which is provided with internal threads. The locking member 21 has a protrusion, the outer wall of which is provided with external threads, and the rotating member 36 and the connecting member 23 are threadedly connected by meshing the internal threads and the external threads.

[0062] Please review Figure 4 and Figure 5 , the other end of the connecting member 23 is connected to a second locking member 25. The second locking member 25 includes a locking rod 251, a first locking tongue and a second locking tongue. The first locking tongue is used to hook on the first locking member 35, and the second locking tongue is used to stop the first locking member 35, so that the lock body 30 can drive the connecting member 23 to rotate relative to the locking member 21 through the locking rod 251. In some embodiments, the first locking tongue and the second locking tongue are located at different positions of the locking rod 251, and each plays a role of hooking and stopping. However, those skilled in the art understand that by setting a suitable position, the first locking tongue and the second locking tongue can also be realized by the same component. As an example, in this embodiment, the first locking tongue and the second locking tongue can be the same component, that is, Figure 4 and Figure 5The lock tongue 252 shown protrudes from the lock rod 251 in the radial direction of the lock rod 251 and is connected to the lock rod 251 in a straight line. The first lock tongue and the second lock tongue are uniformly referred to as the lock tongue 252. In this embodiment, the first lock tongue and the second lock tongue are arranged at the top of the lock rod 251 and protrude in the radial direction of the lock rod 251, so that the first locking member 35 forms a "T"-shaped structure, but the lock tongue can also be a cross or plum blossom shape or other structures.

[0063] In this embodiment, the lock head 20 also includes a connecting rod 241, a pressure plate 24 and a first spring 242. There are multiple first springs 242, which are arranged in a circumferential direction between the locking member 21 and the battery box 10. The pressure plate 24 is provided with multiple through holes arranged in a circumferential direction. A nut is provided at one end of the connecting rod 241, and the inner diameter of the through hole is larger than the outer diameter of the connecting rod 241, but smaller than the outer shape of the nut at the end of the connecting rod 241. The locking member 21 is provided with multiple threaded holes corresponding to the connecting rod 241. The connecting rod 241 passes through the through hole of the pressure plate 24 and is screwed into the threaded hole of the locking member 21, so that the end of the connecting rod 241 is connected to the locking member 21. In this embodiment, the first spring 242 is sleeved on the connecting rod 241 and is located between the locking member 21 and the pressure plate 24. One end of the first spring 242 abuts against the locking member 21 and extends along the axial direction of the connecting rod 241. Under the guidance of the connecting rod 241, the first spring 242 expands and contracts along the length direction of the connecting rod 241.

[0064] When the lock 20 is installed, the connecting rod 241 passes through the connection area between the pressure plate 24 and the battery box 10 in sequence, and the end is threadedly connected with the locking member 21. When the battery box 10 is locked to the vehicle body 11, the locking member 21 compresses the first spring 242 located between the locking member 21 and the battery box 10 under the traction of the connecting member 23, so that one end of the first spring 242 abuts against the locking member 21, and the other end abuts against the battery box 10 along the connecting rod 241. The first spring 242 can apply pressure to the battery box 10 from all directions. Even if the locking member 21 of the lock 20 is offset during the locking process, the first spring 242 can apply force to the battery box 10 in all directions to avoid local compression due to the tilt of the locking member 21 during the locking process. However, after the battery box 10 shakes and causes the locking member 21 to change its tilt angle, the battery box 10 cannot be locked. Similarly, if the lock head 20 is installed on the vehicle body 11 , the other end of the first spring 242 abuts against the vehicle body 11 , so that the lock head 20 can apply pressure to the vehicle body 11 evenly along the circumferential direction, which will not be described in detail here.

[0065] Figure 7 is a schematic diagram of the structure of the lock body 30, Figure 8 30 is a schematic diagram of the structure of the lock body 30 in a disassembled state. Figure 7 and Figure 8 As shown, the lock body 30 includes a driving mechanism 31, a lock housing 32, a rotating member 36 and a first locking member 35. In this embodiment, the lock body 30 can be installed on the vehicle body 11 to lock the lock cylinder 20.

[0066] The lock housing 32 includes a first housing 321 and a second housing 322, wherein the bottom of the first housing 321 is connected to the driving machine 31. The second housing 322 is sleeved on the first housing 321 along the axial direction, so that the second housing 322 is movably connected to the first housing 321. Specifically, the end of the first housing 321 has an extension portion, and the second housing 322 includes a through hole, and the extension portion of the first housing 321 is inserted into the through hole of the second housing 322, so that the second housing 322 can move relative to the first housing 321. In this embodiment, the lock body 30 also includes a support rod 33 and a second spring 332. One end of the support rod 33 is connected to the second housing 322, and the other end passes through the first housing 321 and is clamped to the first housing 321. The second spring 332 is sleeved on the support rod 33 and one end abuts against the first housing 321, and the other end abuts against the second housing 322, so that the second housing 322 is elastically connected to the first housing 321. In the initial situation, the second housing 322 is supported by the support rod 33 under the elastic force of the second spring 332, so that the second housing 322 and the first housing 321 are located at the initial position. During the locking process of the battery box 10, the second housing 322 moves toward the first housing 321 under the push of the external force and compresses the second spring 332. After the external force is released, the second housing 322 can still automatically return to the initial position under the restoring force of the second spring 332.

[0067] In this embodiment, the lock body 30 also includes a displacement detection switch 333. The displacement detection switch 333 can be a mechanical trigger switch installed at the bottom of the lock shell 32 or the driving machine 31, but those skilled in the art can set the displacement detection switch 333 at other installation positions as needed. The bottom of the support rod 33 is provided with a trigger portion 331 protruding outward, which pushes the second shell 322 and the support rod 33 to move when the locking member 21 moves. When the support rod 33 moves to a preset position, the trigger portion 331 triggers the displacement detection switch 333, so that it can be determined that the locking member 21 moves to the preset position, and the locking operation of the battery box 10 is completed.

[0068] Fig. 9 is a schematic diagram of the structure of the driving machine 31 and the rotating member 36, Fig.10 It is a schematic diagram of the structure of rotating parts, bearings and drive motors. Fig. 9 and Fig.10As shown, the driving machine 31 includes a motor and a reducer, the motor is connected to the reducer to output torque through the reducer, and the second housing 322 is connected to the reducer.

[0069] The lock housing 32 formed by the first shell 321 and the second shell 322 has a cavity 323 inside for accommodating the rotating member 36. The rotating member 36 is generally in a disc-shaped structure, and one side thereof is connected to the reducer of the driving machine 31 through a connecting shaft 363, so that the driving machine 31 can drive the rotating member 36 to rotate through the connecting shaft 363. A slot 364 is provided on the side of the rotating member 36 facing the first locking member 35, and the first locking member 35 is engaged in the slot 364 through a bayonet 361 to connect to the rotating member 36. When the rotating member 36 rotates, the rotating member 36 drives the first locking member 35 to rotate in the cavity 323 through the bayonet 361.

[0070] like Fig.10 As shown, the lock body 30 further includes an origin detection switch 34, and an opening 362 is provided on the rotating surface of the rotating member 36. The origin detection switch 34 faces the rotating surface of the rotating member 36 to detect the origin position of the rotating member 36 through the opening 362. The origin detection switch 34 may be a magnetic switch, and at least the rotating surface of the rotating member 36 includes a metal material, so that during the rotation of the rotating member 36, the origin detection switch 34 can sense the metal material of the rotating member 36, but cannot sense the metal material at the origin (i.e., the opening 362) and output a trigger signal, thereby realizing the detection of the origin position of the rotating member 36.

[0071] Fig.11 is a schematic structural diagram of the first locking member 35, Fig.12 yes Fig.11 In this embodiment, the first locking member 35 is located in the lock body 30 and is used for being engaged with the second locking member 25 .

[0072] The first locking member 35 is generally cylindrical and hollow. The first locking member 35 is located in the lock housing 32, and a bearing 351 is provided on the outer wall thereof, so that the first locking member 35 is rotatably connected to the inner wall of the cavity 323 of the lock housing 32. The bottom of the first locking member 35 is engaged in the slot 364 of the rotating member 36 through a bayonet 361, and can rotate under the drive of the rotating member 36.

[0073] In this embodiment, the first locking member 35 includes an entry channel 352 extending along the axial direction, a bearing portion 353 and a stopper portion 354. The entry channel 352 extends along the axial direction of the first locking member 35 and corresponds to the shape of the second locking member 25, so that the locking rod 251 can move along the axial direction. Fig.12The direction of AA shown moves within the entry channel 352. In this embodiment, the entry channel 352 is a shaped hole with a long strip cross-section.

[0074] The bearing portion 353 is used to bear the first locking tongue. In the present embodiment, the bearing portion 353 is a block-shaped structure close to the entry channel 352, and includes a bearing surface 3531 for bearing the first locking tongue. The bearing surface 3531 may be an end surface of the bearing portion 353, and may be one of two end surfaces along the axial direction depending on the area where the first locking tongue abuts the bearing portion 353. The bearing surface of the bearing portion 353 is provided with a groove 3532, and the shape of the groove 3532 corresponds to the shape of the first locking tongue. In the present embodiment, the first locking tongue is a cylindrical structure, and the groove 3532 is in the shape of an arc-shaped groove body, and the arc-shaped groove 3532 just accommodates the first locking tongue, and the first locking tongue abuts against the bearing portion 353 in the groove 3532.

[0075] The stopper 354 is used to abut against the second locking tongue, so that the first locking member 35 can drive the locking rod 251 to rotate. In this embodiment, the stopper 354 has a side surface along the vertical direction. When the rotating member 36 drives the first locking member 35 to rotate, the stopper 354 and the second locking tongue are in the circumferential direction (i.e. Fig.12 The second locking tongue moves toward each other in the BB direction (shown in the figure) until the second locking tongue abuts against the stopping surface (ie, the side surface) of the stopping portion 354, thereby driving the locking rod 251 to rotate.

[0076] In this embodiment, the bearing portion 353 and the stop portion 354 are respectively a pair, which are arranged in a circumferential direction at the center position of the entry channel 352, and may have a certain interval in the circumferential direction. After the locking rod 251 enters the first locking member 35 along the entry channel 352, it rotates a preset angle and abuts against the stop surface of the stop portion 354. At this time, the first locking tongue abuts against the bearing portion 353 and is located in the groove 3532 of the bearing portion 353, so that the locking rod 251 and the first locking member 35 are locked. After the locking rod 251 rotates in the opposite direction by a preset angle, the first locking tongue is located at the position of the entry channel 352, so that the locking rod 251 can be separated from the first locking member 35 along the entry channel 352.

[0077] The following describes in detail a battery locking method based on the battery lock. The battery locking method is used to lock the battery box 10 to the vehicle body 11, and includes the following steps:

[0078] First, the lock head 20 is installed on the battery box 10, and the lock body 30 is installed on the battery box 10. When the battery box 10 is lowered, the lock rod 251 of the second locking member 25 moves along the entry channel 352 of the first locking member 35 until the first locking tongue passes over the bearing surface 3531 of the bearing portion 353. At this time, the end surface of the bearing portion 353 away from the locking member 21 (i.e., the bearing surface 3531) is located between the first locking tongue and the locking member 21, that is, in this embodiment, the first locking tongue is located obliquely below the bearing surface of the bearing portion 353.

[0079] Then, the driving motor 31 is started to drive the rotating member 36 to rotate, and the rotating member 36 drives the first locking member 35 to rotate through the bayonet 361. During the rotation of the first locking member 35, the bearing portion 353 and the first locking tongue move toward each other. During the rotation of the first locking member 35, the first locking tongue moves along the circumferential direction of the first locking member 35 until the first locking tongue at least partially overlaps with the bearing surface of the bearing portion 353 in the axial direction to clamp the locking rod 251 to the first locking member 35. In addition, when the first locking member 35 rotates, the second locking tongue of the locking rod 251 abuts against the stopper 23 of the first locking member 35.

[0080] Then, the rotating member 36 drives the first locking member 35 to continue to rotate, and the stopper 23 pushes the locking rod 251 to rotate through the second locking tongue. Since the locking rod 251 and the connecting member 23 are an integral structure, the rotation of the locking rod 251 can drive the connecting member 23 to rotate relative to the locking member 21, so that the locking member 21 is pulled by the connecting member 23 and the locking rod 251, and the lock head 20 and the lock body 30 move toward each other to lock the battery box 10 to the vehicle body 11.

[0081] During the movement of the locking member 21 , the locking member 21 compresses the first spring 242 between the locking member 21 and the pressing plate 24 , so that the first spring 242 presses the battery box 10 to make the pressing plate 24 abut against the battery box 10 .

[0082] When it is necessary to unlock the battery box 10, the driving motor 31 drives the rotating member 36 to rotate in the opposite direction. The rotating member 36 drives the locking rod 251 to rotate to a position corresponding to the entrance channel 352 through the first locking member 35 and is stopped by the stop block 23, thereby completing the unlocking of the battery box 10. Then the rotating member 36 rotates again relative to the locking rod 251 to further release the battery box 10.

[0083] Finally, after confirming that the battery box 10 is completely released, the battery box 10 can be moved to complete the unlocking process.

[0084] Example 2

[0085] The difference between Example 2 and Example 1 is that in this embodiment, the first locking member 35 and the second locking member 25 are swapped, that is, the first locking member 35 is located at the lock head 20 , and the second locking member 25 is located at the lock body 30 .

[0086] Fig.13 is a schematic diagram of the structure of the battery lock embodiment 2 in the battery replacement system, Fig.14 Schematic diagram of the structure of the battery lock embodiment 2. Fig.13 and Fig.14 As shown, in this embodiment, the first locking member 35 (i.e., a cylindrical structure) is connected to the connecting member 23 of the lock head 20. The connecting member 23 is threadedly connected to the locking member 21, and the connecting member 23 is connected to the first locking member 35. The structure of the first locking member 35 is the same as that of Example 1, and will not be repeated here.

[0087] The lock body 30 includes a second locking member 25 (i.e. Fig.14 The structure of the second locking member 25 is the same as that of Example 1 and will not be described in detail here.

[0088] When in use, the lock head 20 is installed on the battery box 10, and the lock body 30 is installed on the battery box 10. When the battery box 10 is lowered, the lock rod 251 of the second locking member 25 moves along the entry channel 352 of the first locking member 35 until the first locking tongue passes over the bearing surface 3531 of the bearing portion 353. At this time, the end surface of the bearing portion 353 away from the locking member 21 (i.e., the bearing surface 3531) is located between the first locking tongue and the rotating member 36, that is, in this embodiment, the first locking tongue is located obliquely above the bearing surface of the bearing portion 353.

[0089] Then, the driving machine 31 drives the rotating member 36 to rotate, and the rotating member 36 drives the locking rod 251 of the second locking member 25 to rotate through the bayonet 361. During the rotation of the locking rod 251, the bearing portion 353 and the first locking tongue move toward each other. During the rotation of the locking rod 251, the first locking tongue moves along the circumferential direction of the first locking member 35 until the first locking tongue at least partially overlaps with the bearing surface 3531 of the bearing portion 353 in the axial direction to clamp the locking rod 251 to the first locking member 35. In addition, when the locking rod 251 rotates, the second locking tongue of the locking rod 251 abuts against the stopper 23 of the first locking member 35.

[0090] Then, the rotating member 36 drives the locking rod 251 to continue to rotate, and the second locking tongue pushes the stopper 23 to drive the first locking member 35 to rotate. Since the first locking member 35 is connected to the connecting member 23, the rotation of the locking rod 251 can drive the connecting member 23 to rotate relative to the locking member 21, so that the locking member 21 is pulled by the connecting member 23 and the locking rod 251, and the lock head 20 and the lock body 30 move toward each other to lock the battery box 10 to the vehicle body 11.

[0091] When it is necessary to unlock the battery box 10, the driving motor 31 drives the rotating member 36 to rotate in the opposite direction, and the rotating member 36 drives the locking rod 251 to rotate to a position corresponding to the entrance channel 352 and is stopped by the stop block 23, thereby completing the unlocking of the battery box 10. Then the rotating member 36 rotates again relative to the locking rod 251 to further release the battery box 10.

[0092] Finally, after confirming that the battery box 10 is completely released, the battery box 10 can be moved to complete the unlocking process.

[0093] Before locking the battery box 10, the above-mentioned battery lock and locking method are used. The connecting member 23 is connected to the locking member 21 through threads. After the lock head 20 is clamped by the first locking member 35 and the second locking member 25, it is sleeved on the end of the connecting member 23, and the connecting member 23 is driven to rotate relative to the locking member 21, so that the lock head 20 and the lock body 30 move toward each other to lock the battery box 10. In the process of locking the battery box 10, there is no need to screw in or out after thread engagement, which avoids the problem of thread wear due to inaccurate thread head position when the threads are connected and screwed together. The above-mentioned battery lock and locking method can allow larger docking errors, and has a simple structure and low production and maintenance costs.

[0094] Moreover, the above-mentioned battery lock and locking method lock the battery box 10 by driving the connecting member 23 to rotate relative to the locking member 21. Since the diameter of the connecting member 23 is small, the diameter of the thread of the connecting member 23 and the locking member 21 is also small. The connecting member 23 can be driven to rotate with a smaller torque, thereby reducing the power of the driving motor 31. This is particularly important for battery locks in situations where space is limited.

[0095] In the several specific embodiments provided, it should be understood that it is obvious to those skilled in the art that the invention is not limited to the details of the above exemplary embodiments, and that the invention can be implemented in other specific forms without departing from the spirit or basic features of the present disclosure. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-limiting. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. The words first, second, etc. are used to indicate names, and do not indicate any particular order.

[0096] The above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention is described in detail with reference to the above preferred embodiments, those skilled in the art should understand that the solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention.

Claims

1. A battery lock for locking a battery box to a vehicle body, characterized in that: include: Lock body; The lock head comprises a locking member and a connecting member, wherein the locking member is threadedly connected to the connecting member; After the connecting member is clamped on the lock body, the connecting member rotates relative to the locking member, so that the connecting member pulls the lock body to lock the battery box to the vehicle body; The lock body further comprises a first locking member and a second locking member, wherein one of the first locking member and the second locking member is connected to the lock body, and the other is connected to the connecting member, and the connecting member is connected to the lock body by the first locking member being clamped to the second locking member; The first locking member includes a bearing portion and an entry channel; the second locking member includes a locking rod and a first locking tongue protruding in a radial direction of the locking rod; when the first locking member and the second locking member move toward each other, the locking rod moves axially along the entry channel until the first locking tongue passes over the bearing surface of the bearing portion, and the connecting member is rotated so that the first locking tongue moves in a circumferential direction relative to the bearing portion until at least part of the first locking tongue overlaps in an axial direction with the bearing surface of the bearing portion, so that the locking rod is clamped to the first locking member; The second locking member further includes a second locking tongue extending in the radial direction of the locking rod, and the first locking member further includes a stopper, and when the second locking tongue abuts against the stopper, the locking member rotates relative to the connecting member; The locking member includes a cavity, the side wall of the cavity is provided with an internal thread, the connecting member is provided with an external thread, and the locking member and the connecting member are threadedly connected by meshing the internal thread and the external thread, or the connecting member includes a cavity, the side wall of the cavity is provided with an internal thread, the outer wall of the locking member is provided with an external thread, and the locking member and the connecting member are threadedly connected by meshing the internal thread and the external thread; The lock head also includes a connecting rod, a pressure plate and a first spring. The pressure plate is provided with a plurality of through holes arranged in a circumferential direction. A nut is provided at one end of the connecting rod. The inner diameter of the through hole is larger than the outer diameter of the connecting rod, but smaller than the shape of the nut at the end of the connecting rod. The locking piece is provided with a plurality of threaded holes corresponding to the connecting rod. The connecting rod passes through the through holes of the pressure plate and is screwed into the threaded holes of the locking piece, so that the end of the connecting rod can be connected to the locking piece. The first spring is sleeved on the connecting rod and is located between the locking piece and the pressure plate. One end of the first spring abuts against the locking piece and extends along the axial direction of the connecting rod. Under the guidance of the connecting rod, the first spring expands and contracts along the length direction of the connecting rod.

2. The battery lock according to claim 1, characterized in that: The lock body further comprises a driving machine, a rotating member and an origin detection switch, wherein the driving machine is connected to the rotating member, and the rotating member is connected to the first locking member or the second locking member, and is used for driving the connecting member to rotate through the first locking member and the second locking member when the first locking member and the second locking member are engaged under the drive of the driving machine; The rotating surface of the rotating member is provided with an opening, and the origin detection switch faces the side surface of the rotating member to detect the origin position of the rotating member through the opening.

3. The battery lock according to claim 2, characterized in that: The lock body also includes a lock shell, a support rod, a second spring and a displacement detection switch; The lock housing comprises a first shell and a second shell, wherein the first shell is sleeved in the second shell along the axial direction so as to be movably connected to the second shell; the first shell and the second shell have a cavity inside, and the rotating member is rotatably arranged in the cavity; One end of the support rod is connected to the second shell, and the other end passes through the first shell and is clamped to the first shell; the second spring is sleeved on the support rod and one end abuts against the first shell, and the other end abuts against the second shell; When the locking member moves along the axial direction of the connecting member under the traction of the connecting member to push the second shell, the second shell drives the support rod to move to a preset position to trigger the displacement detection switch.

4. A locking method for locking a battery box to a vehicle body, characterized in that: Adapted to the battery lock according to any one of claims 1 to 3, the locking method comprises the following steps: When the lock head and the lock body move toward each other until the connecting piece of the lock head is engaged with the lock body, the connecting piece is driven to rotate relative to the locking piece of the lock head; The connecting member pulls the lock body to lock the battery box to the vehicle body; When the battery box is locked to the vehicle body, the locking member compresses the first spring located between the locking member and the battery box under the traction of the connecting member, so that one end of the first spring abuts the locking member and the other end abuts the battery box along the connecting rod, and the first spring applies pressure to the battery box from all directions.

5. The locking method according to claim 4, characterized in that: The connecting piece of the lock head is connected to the lock body and comprises: When the first locking member and the second locking member move toward each other, the locking rod of the second locking member moves axially along the entry channel of the first locking member until the first locking tongue of the locking rod passes over the bearing surface of the bearing portion of the first locking member; Rotating the connecting member causes the first locking tongue to move toward the bearing portion in a circumferential direction until the first locking tongue at least partially overlaps with the bearing surface of the bearing portion in an axial direction, so that the first locking tongue can abut against the bearing surface to clamp the locking rod to the first locking member; and The connecting member pulling the lock body comprises: When the second locking tongue of the second locking member abuts against the stopping portion of the first locking member, the connecting member rotates relative to the locking member, so that the connecting member moves until the first locking tongue abuts against the bearing surface to pull the lock body; wherein, one of the first locking member and the second locking member is connected to the connecting member of the lock head, and the other is connected to the lock body, and the connecting member is clamped to the lock body by the first locking member being clamped to the second locking member.

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