1. A locking device is characterized by comprising a locking assembly, wherein the locking assembly is used for being connected to a bracket in a turnover mode and matched with the bracket to achieve locking or unlocking of a battery box relative to the bracket.

2. The latch of claim 1, wherein said latch assembly includes a pivot shaft and a blocking member, said blocking member being coupled to said carriage by said pivot shaft, said blocking member being rotatable on said carriage to switch between a latched state and an unlatched state.

3. The lock-out mechanism of claim 2, further comprising an abutment mechanism for abutting against the blocking member and limiting rotation of the blocking member from the locked position to the unlocked position.

4. The latch mechanism of claim 3, wherein said blocking member includes a flip portion, said flip portion being pivotally connected to said bracket, said biasing mechanism including a movable member and a stationary member, said movable member being movable on said stationary member relative to said stationary member between a first position and a second position, said movable member applying no force to said flip portion when said movable member is in said first position, and said movable member applying a force to said flip portion when said movable member is in said second position to place said blocking member in said latched state.

5. The locking device of claim 4, wherein the movable member is disposed through the stationary member.

6. The locking device of claim 4, wherein a first resilient member is disposed between the movable member and the stationary member, the first resilient member applying a force to the movable member to move to the second position.

7. The locking device of claim 4, wherein the stationary member includes a limiting portion for limiting the movable member to move between the first position and the second position.

8. The locking device of claim 7, wherein the limiting portion is a limiting groove, and the movable member is slidably disposed in the limiting groove.

9. The locking device of claim 4, wherein the blocking member further comprises a first retaining member connected between the flip portion and the movable member.

10. The locking device of claim 9, wherein the lower end of the first limiting member extends out of the bottom of the turning portion and is configured to abut against the movable member so as to lock the turning portion.

11. The locking device of claim 10, wherein a locking groove is formed at a lower end of the first limiting member, and the locking groove is used for cooperating with the movable member to prevent the turning portion from turning to the unlocking position.

12. The lock-out mechanism of claim 4, wherein the blocking member further comprises a driving portion for driving the flipping portion to flip around the rotation axis.

13. The locking device of claim 12, wherein the driving portion includes a second limiting member that is coaxially flipped with the flipping portion;

the second limiting part is used for being matched with a matching part on the battery box, and when the battery box enters the bracket, the second limiting part overturns under the thrust of the matching part to drive the overturning part to overturn to a locking state.

14. The locking device of claim 13, wherein the second retaining member comprises a connecting portion and a folded portion, the connecting portion is connected to the rotating shaft, and a receiving cavity is provided between the folded portion and the connecting portion, and the receiving cavity is used for receiving the matching member.

15. The locking device of claim 4, wherein the biasing mechanism further comprises an unlocking element connected to the movable member for driving the movable member to slide on the stationary member.

16. The locking device of claim 15, wherein the unlocking assembly includes an unlocking guide rod and an unlocking link rod, the unlocking link rod is slidably disposed on the unlocking guide rod and can move relative to the unlocking guide rod along the sliding direction of the movable member, and the unlocking link rod is connected to the movable member through a connecting member.

17. The locking device of claim 16, wherein the unlocking assembly further comprises a second elastic member, the unlocking guide rod has a sliding slot, the second elastic member is disposed in the sliding slot, and two ends of the second elastic member respectively abut against the unlocking guide rod and the unlocking connecting rod.

18. The lock-out mechanism of claim 13, wherein there are two of the pressing mechanisms, and the two pressing mechanisms are symmetrically disposed on two sides of the unlock assembly.

19. A carrier assembly, characterized in that it comprises a locking device according to any one of claims 1-18.

20. The tray assembly of claim 19, further comprising a carrier for carrying the battery compartment, wherein the locking device is disposed on the carrier.

21. The bracket assembly of claim 20, wherein the locking device comprises a pressing mechanism, and a fixing member of the pressing mechanism is fixedly connected with the bearing part.

22. An electric vehicle comprising a bracket assembly according to any one of claims 19 to 21.

23. A locking method of a battery box is characterized by comprising the following steps:

driving the locking assembly to turn over to an unlocking state so as to open a passage for the battery box to enter and exit the bracket;

placing the battery box at a preset position on the bracket;

pushing the battery box to move to a locking position in a direction close to the bracket;

and driving the locking assembly to turn over to a locking state so as to close a passage for the battery box to enter and exit the bracket.

Background

With social development and technological progress, electric vehicles are more and more popular with consumers, and as a power source of the electric vehicles, a battery box needs to be charged in time. Due to the requirements of endurance mileage and power, the electric quantity of a battery box required by an automobile is higher and higher, the requirement of using the automobile in partial scenes cannot be met by a traditional charging mode, the battery box needs to be replaced and placed on a charging frame for charging, and the automobile can be normally used in the charging time. The battery box (battery box assembly) consists of a battery box and a bracket, and the battery box is arranged on the bracket so as to realize the fixation, stability and reliability of the battery box. In the prior art, the battery box with a large size cannot be accurately locked, so that the battery box and the bracket are not reliably matched or the battery replacement efficiency is influenced.

Disclosure of Invention

The invention aims to overcome the defect that the matching of a battery box and a bracket is unreliable in the prior art, and provides a locking device, a bracket assembly, an electric automobile and a locking method of the battery box.

The invention solves the technical problems through the following technical scheme:

the locking device is characterized by comprising a locking assembly, wherein the locking assembly is used for being connected to a bracket in a turnover mode and matched with the bracket so as to realize locking or unlocking of a battery box relative to the bracket.

In this scheme, adopt above-mentioned structural style, through setting up locking means's locking subassembly on the bracket to through upset locking subassembly, thereby utilize the locking subassembly to carry out locking or unblock to the battery box, and then realize fixing or changing the battery box. The locking device is beneficial to improving the stability of the battery box on the bracket and the reliability of the electrical connection of the battery box.

Preferably, the locking assembly includes a rotating shaft and a blocking member, the blocking member is connected to the bracket through the rotating shaft, and the blocking member rotates on the bracket to switch between a locked state and an unlocked state.

In this scheme, adopt above-mentioned structural style, will block parts through the pivot and connect formation locking subassembly on the bracket, realize the locking or the unblock to the battery box through rotating block parts.

Preferably, the locking device further comprises a pressing mechanism for pressing the blocking component and limiting the blocking component to rotate from the position of the locking state to the position of the unlocking state.

In this scheme, adopt above-mentioned structural style, in order to avoid the part that blocks to rotate under the exogenic action and lead to its not hard up or unblock after carrying out the locking to the battery box, restrict the rotation of blocking the part through pressing the mechanism, further guarantee the steadiness of battery box on the bracket, also be favorable to improving the reliability of the electric connection of battery box.

Preferably, the blocking member includes a turning portion, the turning portion is connected to the bracket in a turnable manner, the abutting mechanism includes a movable member and a fixed member, the movable member is movable on the fixed member between a first position and a second position relative to the fixed member, when the movable member is located at the first position, the movable member does not apply an acting force to the turning portion, and when the movable member is located at the second position, the movable member applies an acting force to the turning portion, so that the blocking member is in a locked state.

In this scheme, adopt above-mentioned structural style, realize through the change of moving part position on the mounting whether supporting and pressing the mechanism and support and press the barrier component, and then decide that the barrier component is in the locking or the unblock.

Preferably, the movable member is disposed on the fixed member in a penetrating manner.

In this scheme, adopt above-mentioned structural style, be convenient for carry on spacingly, simple structure to the removal of moving part.

Preferably, a first elastic element is arranged between the movable element and the fixed element, and the first elastic element applies acting force to the movable element to move to the second position.

In this scheme, adopt above-mentioned structural style, in order to avoid the moving part to break away from the barrier member when the blocking part is in the locking state, cause the battery box not hard up.

Preferably, the fixed member is provided with a limiting portion, and the limiting portion is used for limiting the moving member so that the moving member moves between the first position and the second position.

In this scheme, adopt above-mentioned structural style, through set up the spacing portion of restriction moving part moving path on the mounting, simple structure to be favorable to the moving part to remove between primary importance and second place and switch.

Preferably, the limiting portion is a limiting groove, and the moving member is slidably disposed in the limiting groove.

In this scheme, adopt above-mentioned structural style, set into the cell type with spacing portion, the processing of being convenient for.

Preferably, the blocking component further includes a first limiting member, and the first limiting member is connected between the turning portion and the movable member.

In this scheme, adopt above-mentioned structural style, first locating part can provide the power of outwards overturning for the upset portion of blockking parts.

Preferably, the lower end of the first limiting member extends out of the bottom of the turning portion and is used for abutting against the moving member, so that the turning portion is in a locking state.

In this scheme, adopt above-mentioned structural style, the moving part can support when upset portion is in the locking state and lean on first locating part, avoids upset portion outwards to overturn under external force, makes the battery box produce not hard up, influences the electricity of battery box and bracket and is connected.

Preferably, a clamping groove is formed at the lower end of the first limiting part and is used for being matched with the moving part to prevent the overturning part from overturning to the unlocking state.

In this scheme, adopt above-mentioned structural style, the draw-in groove can provide accommodation space for first locating part when the unblock state at upset portion on the one hand, and on the other hand can be used for the moving part to slide to the below of upset portion when upset portion is in the locking state, can support and lean on first locating part, prevents the outside upset of upset portion.

Preferably, the blocking component further comprises a driving part, and the driving part is used for driving the overturning part to overturn around the rotating shaft.

In this scheme, adopt above-mentioned structural style, can make upset portion take place when the battery box loads onto the bracket, with the battery box locking.

Preferably, the driving part comprises a second limiting part, and the second limiting part and the overturning part are coaxially overturned;

the second limiting part is used for being matched with a matching part on the battery box, and when the battery box enters the bracket, the second limiting part overturns under the thrust of the matching part to drive the overturning part to overturn to a locking state.

In this scheme, adopt above-mentioned structural style, need not carry out extra operation and can make upset portion take place to overturn when the bracket is packed into to the battery box, convenient operation is simple.

Preferably, the second limiting part comprises a connecting part and a folded part, the connecting part is connected with the rotating shaft, an accommodating cavity is arranged between the folded part and the connecting part, and the accommodating cavity is used for accommodating the matching part.

In this scheme, adopt above-mentioned structural style, simple structure, convenient manufacturing, it is with low costs.

Preferably, the pressing mechanism further comprises an unlocking assembly, and the unlocking assembly is connected to the movable member and is used for driving the movable member to slide on the fixed member.

In this scheme, adopt above-mentioned structural style, when packing into the bracket with the battery box or taking off the battery box from the bracket, through the removal of the action control moving part of unblock subassembly to make the moving part break away from upset portion and realize the unblock.

Preferably, the unlocking assembly comprises an unlocking guide rod and an unlocking connecting rod, the unlocking connecting rod is slidably arranged on the unlocking guide rod and can move along the sliding direction of the moving member relative to the unlocking guide rod, and the unlocking connecting rod is connected with the moving member through a connecting piece.

In this scheme, adopt above-mentioned structural style, drive the unblock connecting rod through the removal on the unblock guide arm and remove, and then make the removal of moving part and break away from upset portion, upset portion can realize the unblock under the condition that no moving part supports the pressure.

Preferably, the unlocking assembly further comprises a second elastic piece, a sliding groove is formed in the unlocking guide rod, the second elastic piece is arranged in the sliding groove, and two ends of the second elastic piece are respectively abutted against the unlocking guide rod and the unlocking connecting rod.

In this scheme, adopt above-mentioned structural style, through the mode of unblock guide arm and unblock connecting rod sliding connection and set up the spring between the two, if the moving part removes behind the primary importance, the unblock guide arm continues to receive external force to inwards move, and the unblock connecting rod can move and compress the spring towards the direction of unblock guide arm, provides the buffering, avoids the moving part to damage.

Preferably, the number of the pressing mechanisms is two, and the two pressing mechanisms are symmetrically arranged on two sides of the unlocking assembly.

In this scheme, adopt above-mentioned structural style, can provide bigger support pressure effort to first locating part, be favorable to the stability of upset portion, make better being in the locking state of upset portion.

A bracket assembly characterised in that it includes a locking arrangement as described above.

In this scheme, adopt above-mentioned structural style, install locking means on the bracket assembly, convenient to use need not install locking means alone again.

Preferably, the bracket assembly further comprises a bearing part, the bearing part is used for bearing the battery box, and the locking device is arranged on the bearing part.

In this scheme, adopt above-mentioned structural style, locate locking means on the bearing part, conveniently carry out the locking operation to the battery box when the installation battery box.

Preferably, the locking device includes a pressing mechanism, and a fixing member of the pressing mechanism is fixedly connected to the bearing portion.

An electric vehicle, characterized in that the electric vehicle comprises the bracket assembly.

In this scheme, adopt above-mentioned structural style for electric automobile's battery box is reliable with the cooperation of bracket, guarantees that the electric connection structural connection on battery box and the bracket is stable, avoids causing the incident.

A locking method of a battery box is characterized by comprising the following steps:

driving the locking assembly to turn over to an unlocking state so as to open a passage for the battery box to enter and exit the bracket;

placing the battery box at a preset position on the bracket;

pushing the battery box to move to a locking position in a direction close to the bracket;

and driving the locking assembly to turn over to a locking state so as to close a passage for the battery box to enter and exit the bracket.

On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.

The positive progress effects of the invention are as follows: according to the invention, the locking assembly of the locking device is arranged on the bracket, and the locking assembly is turned over, so that the battery box is locked or unlocked by the locking assembly, and the battery box is fixed or replaced. The locking device is beneficial to improving the stability of the battery box on the bracket and the reliability of the electrical connection of the battery box.

Drawings

Fig. 1 is a schematic view of the installation of a battery box on a bracket according to a preferred embodiment of the present invention.

FIG. 2 is a schematic view of the locking device on the bracket according to the preferred embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a locking device in a preferred embodiment of the invention.

Fig. 4 is a schematic structural view of the locking device in an unlocked state according to the preferred embodiment of the present invention.

FIG. 5 is a schematic structural view of the locking device in a locked state according to the preferred embodiment of the present invention.

Fig. 6 is a schematic view of the biasing mechanism and the unlocking assembly in the preferred embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an unlocking assembly in a preferred embodiment of the invention.

Description of reference numerals:

bracket 10

Bearing part 11

Back plate 12

Electrical connector plug 13

Battery box 20

Locking assembly 30

Rotating shaft 31

Turning part 32

Turning plate 321

First position-limiting member 322

Second limiting member 323

Connecting part 3231

Hem portion 3232

Abutting mechanism 33

Movable member 331

Position-limiting rod 3311

Movable rod 3312

Fixing member 332

Spacing groove 3321

Accommodating groove 3322

First elastic member 333

Unlocking assembly 34

Unlocking guide 341

Sliding groove 3411

Unlocking link 342

Second elastic member 343

Connecting piece 35

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

As shown in fig. 1 to 5, the locking device of the present invention comprises a locking assembly 30, wherein the locking assembly 30 is adapted to be reversibly coupled to the bracket 10 and cooperate with the bracket 10 to lock or unlock the battery box 20 with respect to the bracket 10.

Through setting locking assembly 30 of locking device on bracket 10 to through upset locking assembly 30, thereby utilize locking assembly 30 to lock or unlock battery box 20, and then realize fixing or changing battery box 20. The locking device is beneficial to improving the stability of the battery box 20 on the bracket 10 and the reliability of the electrical connection of the battery box 20.

In the present embodiment, the locking device is disposed at the bottom of the bracket 10, and after the battery box 20 is pushed into the bracket 10, the locking assembly 30 is turned upwards to lock and fix the battery box 20. In other embodiments, the locking device may be provided at an upper portion of the bracket 10, in which embodiment the locking assembly 30 is turned downward; or the locking means may be provided on the left or right side of the bracket 10.

Of course, in order to improve the stability of the battery box 20 on the bracket 10 and to improve the reliability of the electrical connection of the battery box 20, the above-described modes may be adopted at the same time.

As shown in fig. 3 to 5, in the present embodiment, the locking assembly 30 includes a rotation shaft 31 and a blocking member connected to the bracket 10 through the rotation shaft 31, the blocking member being rotated on the bracket 10 to switch between a locked state and an unlocked state. The blocking member is coupled to the bracket 10 by a rotation shaft 31 to form a locking assembly 30, and the blocking member is rotated to lock or unlock the battery case 20.

As shown in fig. 3 to 5, the locking device further includes a pressing mechanism 33, and the pressing mechanism 33 is configured to press against the blocking member and restrict the blocking member from rotating from the position of the locked state to the position of the unlocked state. After the blocking component locks the battery box 20, in order to avoid the situation that the vehicle is overturned towards the unlocking state due to the fact that the battery box 20 shakes in the driving process, the blocking component is further limited to be overturned towards the unlocking state through the abutting mechanism 33, the battery box 20 is prevented from falling off the bracket 10, the stability of the battery box 20 on the bracket 10 is further guaranteed, and the reliability of electric connection of the battery box 20 is improved.

The blocking component comprises a turning part 32, the turning part 32 is connected to the bracket 10 in a turnable manner, the abutting mechanism 33 comprises a movable piece 331 and a fixed piece 332, the movable piece 331 is movable on the fixed piece 332 between a first position and a second position relative to the fixed piece 332, when the movable piece 331 is located at the first position, the movable piece 331 does not apply acting force to the turning part 32, and when the movable piece 331 is located at the second position, the movable piece 331 applies acting force to the turning part 32, so that the blocking component is located at a locking state.

Whether the abutting mechanism 33 abuts against the blocking component is achieved through the position change of the movable piece 331 on the fixed piece 332, and therefore whether the blocking component is locked or unlocked is determined. Specifically, in this embodiment, the movable member 331 of the abutting mechanism 33 is a lock shaft, the fixed member 332 is a lock base, the lock shaft slides on the lock base, when the lock shaft is at the first position of the lock base, there is no interaction force between the lock shaft and the turning portion 32, the turning portion 32 can rotate, when the lock shaft slides to the second position on the lock base, and the lock shaft is located below the turning portion 32, the lock shaft abuts against the turning portion 32, so as to prevent the turning portion 32 from rotating, and achieve the purpose of locking the turning portion 32.

As shown in fig. 5-6, the movable member 331 is disposed through the stationary member 332. The fixed member 332 is provided with a limiting portion for limiting the movable member 331 so that the movable member 331 moves between the first position and the second position.

In this embodiment, the limiting portion is a limiting groove 3321, and the movable member 331 is slidably disposed in the limiting groove 3321. As shown in fig. 5-6, the limiting groove 3321 is disposed on the sidewall of the fixing member 332, and the movable member 331 is disposed in the limiting groove 3321 and can move in the limiting groove 3321. In other embodiments, the retaining groove 3321 may be disposed inside the fixing member 332.

Specifically, as shown in fig. 6, the movable member 331 includes a movable rod 3312 and a position-limiting rod 3311, wherein the movable rod 3312 extends along the moving direction of the movable member 331, the position-limiting rod 3311 extends along the radial direction of the movable rod 3312, the position-limiting rod 3311 is clamped in the position-limiting groove 3321, the fixing member 332 includes an end plate and a side plate which are vertically disposed, a through hole for the movable member 331 to pass is formed in the end plate, the position-limiting groove 3321 is formed in the side plate, the movable rod 3312 penetrates through the through hole of the fixing member 332, the moving direction and the limit position of the movable member 331 are limited by the through hole and the position-limiting groove 3321 in the fixing member 332, and the locking and unlocking precision of the turning part 32 is improved. In other embodiments, the movable rod 3312 may have a plate-like or block-like structure, and the position-limiting rod 3311 may be a protrusion extending in the radial direction of the movable rod 3312.

In other embodiments, the movable element 331 may also be slidably disposed on the fixed element 332, and a sliding block and a sliding rail are disposed on the movable element 331 and the fixed element 332, respectively, to realize the relative movement of the movable element 331 with respect to the fixed element 332. The limiting portion may also be a limiting block disposed on the fixing member 332. Limiting blocks are respectively arranged at the first position and the second position.

As shown in fig. 5, in the present embodiment, the blocking component further includes a first limiting member 322, and the first limiting member 322 is connected between the turning portion 32 and the movable member 331. The lower end of the first limiting member 322 extends out of the bottom of the turning part 32 and presses against the movable member 331, so that the turning part 32 is in a locked state. The lower end of the first limiting member 322 is provided with a locking groove, and the locking groove is used for being matched with the movable member 331 to prevent the turning portion 32 from turning to the unlocking position. In other embodiments, a protrusion is disposed at a lower end of the first limiting member 322 for matching with the slot of the movable member 331.

A first elastic member 333 is disposed between the movable member 331 and the fixed member 332, and the first elastic member 333 applies an urging force to the movable member 331 to move to the second position.

As shown in fig. 4-6, in the present embodiment, the first elastic element 333 is a spring, the fixing element 332 is provided with a receiving groove 3322 inside, the spring is disposed in the receiving groove 3322, one end of the spring is connected to the movable element 331, and the other end of the spring is connected to the fixing element 332, and the spring always applies an acting force to the movable element 331 toward the flip portion 32, so as to avoid that the movable element 331 of the pressing mechanism 33 is separated from the blocking element when the blocking element is in the locked state, which may cause the flip portion 32 to rotate, and affect the locking of the flip portion 32 to the battery box 20. Specifically, as shown in fig. 6, the spring is sleeved on the movable rod 3312 of the movable member 331, one end of the spring is connected to the end plate of the fixed member 332, and the other end of the spring abuts against the position-limiting rod 3311 of the movable member 331, so as to always apply an acting force to the position-limiting rod 3311 to move to the second position, thereby improving the stability of the movable member 331 abutting against the blocking member.

Specifically, the main body of the turning part 32 is a turning plate 321, when the battery box 20 is mounted on the bracket 10, the turning plate 321 will turn over and abut against the sidewall of the battery box 20, at this time, under the elastic force of the spring, the position-limiting rod 3311 of the movable element 331 will move to the second position and maintain the second position, the position-limiting rod 3311 abuts against the first position-limiting member 322, and the turning plate 321 will not rotate at this time because the first position-limiting member 322 is fixedly connected with the turning plate 321.

In the present embodiment, the blocking member further includes a driving part for driving the turning part 32 to turn around the rotating shaft 31. The driving part comprises a second limiting part 323, and the second limiting part 323 and the overturning part 32 are coaxially overturned; the second limiting member 323 is used for matching with a matching member on the battery box 20, and when the battery box 20 enters the bracket 10, the second limiting member 323 is turned over under the thrust of the matching member, and drives the turning part 32 to turn over to a locking state. In other embodiments, the turning part 32 may be driven to perform the turning operation in an electromechanical control manner, for example, after the battery box 20 is placed in the tray 10, the controller detects that the battery box 20 is installed and controls the motor to drive the rotating shaft 31 to rotate or controls the linkage mechanism to push the turning part 32 to turn.

As shown in fig. 5, in the present embodiment, the second limiting member 323 includes a connecting portion 3231 and a folded portion 3232, the connecting portion 3231 is connected to the rotating shaft 31, and an accommodating cavity is disposed between the folded portion 3232 and the connecting portion 3231, and is used for accommodating the matching member.

In the process that the battery box 20 enters the bracket 10, after the matching piece enters the accommodating cavity, the matching piece abuts against the folding portion 3232 and applies thrust to the folding portion 3232, so that the folding portion 3232 turns in the moving direction of the battery box 20, because the second limiting piece 323 is coaxial with the turning portion 32, the turning portion 32 is driven to turn in the same direction in the turning process of the second limiting piece 323, and when the battery box 20 moves to the locking position on the bracket 10, the turning portion 32 turns to the locking state, so that the battery box 20 is locked on the bracket 10. In this embodiment, the matching member may be a protrusion disposed on the bottom of the battery box 20, or other structural members that can be received in the receiving cavity and abut against the flange portion 3232.

As shown in fig. 4-6, in the present embodiment, the pressing mechanism 33 further includes an unlocking element 34, and the unlocking element 34 is connected to the movable element 331 and is configured to drive the movable element 331 to slide on the fixed element 332. The unlocking assembly 34 includes an unlocking guide 341 and an unlocking link 342, the unlocking link 342 is slidably disposed on the unlocking guide 341 and can move along the sliding direction of the movable member 331 relative to the unlocking guide 341, and the unlocking link 342 is connected to the movable member 331 through a connecting member 35. The unlocking guide rod 341 slides inward on the bracket 10 under the pushing of the unlocking piece of the stacker crane, and simultaneously drives the unlocking connecting rod 342 to move so as to drive the movable piece 331 to move, so that the movable piece 331 is separated from the blocking part, and the blocking part can realize unlocking under the condition that the movable piece 331 is not pressed.

As shown in fig. 7, the unlocking assembly 34 further includes a second elastic member 343, the unlocking guide rod 341 has a sliding groove 3411, the second elastic member 343 is disposed in the sliding groove 3411, and two ends of the second elastic member 343 are respectively abutted against the unlocking guide rod 341 and the unlocking link 342. In this embodiment, the second elastic member 343 is also a spring, and the unlocking operation of the unlocking assembly 34 is performed by pushing the unlocking guide 341 to move on the bracket 10 by the unlocking member of the stacker crane, since the stopper rod 3311 cannot move any more after moving to the first position, and the unlocking member of the stacker crane may continue to push the unlocking guide 341 to damage the stopper rod 3311. By the way that the unlocking guide rod 341 and the unlocking link rod 342 are slidably connected and a spring is arranged between the unlocking guide rod 341 and the unlocking link rod 342, after the limiting rod 3311 moves to the first position, if the unlocking guide rod 341 continues to move inward by external force, the unlocking link rod 342 moves toward the unlocking guide rod 341 and compresses the spring to provide buffering, so that the movable member 331 is prevented from being damaged.

As shown in fig. 7, an end of the unlocking guide 341 connected to the unlocking link 342 has a step in a circumferential direction, which may limit a reset position of the unlocking guide 341 when the unlocking guide 341 is reset after the stacker leaves. The flange-like structure of the unlocking guide 341 disposed at an end away from the unlocking link 342 also serves to limit the inward movement distance of the unlocking guide 341.

In this embodiment, when the unlocking assembly 34 is installed, the unlocking guide 341 is slidably disposed on the cross beam at the front end of the bracket 10, and the unlocking link 342 is connected to the movable portion 3312 of the movable portion 331 through the connecting member 35.

Specifically, when the battery box 20 needs to be mounted on the bracket 10, because the turning part 32 can be turned over outwards under the action of the gravity of the first position-limiting part 322, the position-limiting rod 3311 can abut against the first position-limiting part 322 to limit the turning part 32 to rotate to the unlocking state under the action of the spring, an unlocking part is arranged on the stacker crane for transporting the battery box 20, the unlocking part firstly pushes the unlocking guide rod 341 to slide inwards on the bracket 10, and simultaneously drives the unlocking connecting rod 342 to move so as to drive the moving part 331 to move so as to separate the position-limiting rod 3311 from the first position-limiting part 322, at this moment, the turning part 32 can be turned over under an external force, and when the battery box 20 enters the bracket 10, the second position-limiting part 323 on the turning part 32 is turned over under the thrust of the matching part of the battery box 20, and drives the turning part 32 to be turned over to the locking state. After the stacker crane leaves, the unlocking member does not apply acting force to the unlocking guide rod 341, and the limiting rod 3311 is reset to the second position and abuts against the first limiting member 322 under the action of the spring, so that the turning part 32 can be prevented from being loosened.

Similarly, when the battery box 20 needs to be taken down from the bracket 10, the unlocking member on the stacker crane pushes the unlocking guide rod 341 to slide inwards on the bracket 10, and simultaneously drives the unlocking connecting rod 342 to move so as to drive the limiting rod 3311 to leave the first limiting part 322, after the stacker crane lifts the battery box 20, the overturning part 32 overturns outwards under the action of gravity, at this moment, the first limiting part 322 can return to the accommodating groove 3322 of the fixing part 332, after the stacker crane leaves, the limiting rod 3311 can reset under the action of the spring, and again pushes against the first limiting part 322.

In this embodiment, there are two pressing mechanisms 33, and the two pressing mechanisms 33 are symmetrically disposed on two sides of the unlocking assembly 34. The two abutting mechanisms 33 can provide larger abutting acting force for the first limiting part 322, which is beneficial to the stability of the turning part 32, so that the turning part 32 is better in a locking state. In other embodiments, one or more pressing mechanisms 33 may be provided, and are not described in detail herein.

The embodiment also discloses a bracket assembly, which comprises the locking device.

As shown in fig. 2, the bracket assembly further includes a bearing portion 11, the bearing portion 11 is used for bearing the battery box 20, and the locking device is disposed on the bearing portion 11. The locking device comprises a pressing mechanism 33, and a fixing part 332 of the pressing mechanism 33 is fixedly connected with the bearing part 11. The bracket 10 further comprises a back plate 12, the back plate 12 is mounted on the electric vehicle, an electric connecting plug 13 is arranged on one side of the back plate 12 facing the battery box 20, an electric connecting socket is arranged on one side of the battery box 20 facing the bracket 10, and when the battery box 20 is located at a locking position on the bracket 10, the electric connecting plug 13 and the electric connecting socket form an electric connection.

The locking device is arranged on the bracket assembly, so that the use is convenient, and the locking device does not need to be arranged independently. Meanwhile, the locking device is arranged on the bearing part 11, so that the battery box 20 can be conveniently locked when the battery box 20 is installed.

The embodiment also discloses an electric automobile which comprises the bracket assembly. This electric automobile adopts the bracket assembly of above-mentioned structure, can be so that electric automobile's battery box 20 and bracket 10's cooperation is reliable, guarantees that the electric connection structure on battery box 20 and the bracket 10 is connected stably, avoids causing the incident.

The embodiment also discloses a locking method of the battery box, which specifically comprises the following steps:

s1, driving the locking assembly 30 to turn over to an unlocking state so as to open a passage for the battery box 20 to enter and exit the bracket 10; specifically, before the battery box 20 is installed, the turning plate 321 is turned to a position below the bottom of the bracket 10, so that the battery box 20 is conveniently pushed into the bracket 10.

S2, placing the battery box 20 at a preset position on the bracket 10; in this step, the battery box 20 is placed at a predetermined position on the tray 10 by the battery pick and place mechanism.

S3, the battery case 20 is pushed to move toward the bracket 10 to the locking position.

And S4, driving the locking assembly 30 to turn to a locking state to close the passage of the battery box 20 into and out of the bracket 10. In this step, after the battery box 20 is pushed onto the bracket 10, the turning plate 321 is turned over so that the turning plate 321 is pressed against the outer side surface of the battery box 20 to prevent the battery box 20 from moving outward.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.