Locking mechanism and electric vehicle

Abstract

The application discloses a locking mechanism for locking a battery, comprising a support, a first rotating shaft, a first connecting piece, which is rotatably connected with the support through the first rotating shaft, the first connecting piece having a first end and a second end, the first end being used for locking cooperation with the battery, wherein the force arm L2 of the second end is greater than the force arm L1 of the first end, and a lock, which comprises a lock tongue matched with the second end. The application reduces the pressure on the lock tongue by making the force arm L2 of the second end greater than the force arm L1 of the first end, and facilitates the retraction of the lock tongue and the unlocking of the battery. In addition, the side wall of the through hole on the shell of the lock is prevented from being damaged due to excessive force.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric vehicles, in particular to a locking mechanism and an electric vehicle. BACKGROUND

[0002] Electric vehicles are electrically driven vehicles, which meet the development trend of national energy conservation and environmental protection, and have the advantages of small size and convenient use, thus having broad application prospects.

[0003] During use, electric vehicles need to be powered by batteries, and the batteries need to be charged after the power is used up. Moreover, the battery is a power unit and is essential for an electric vehicle.

[0004] In Chinese Patent Application No. CN201810738722.5, an intelligent electric vehicle battery locking structure is disclosed, which includes a battery support fixedly installed on a vehicle frame, a spring lock installed on the battery support, the spring lock including a lock tongue and a return spring, the return spring causing the outer end of the lock tongue to be located outside the spring lock in a natural state, a keyhole connected to the spring lock being provided on the battery support, and a battery lock opening matched with the lock tongue being provided on a battery shell. The description of the technical solution is recorded as "inserting the key of the spring lock into the keyhole 11 and rotating it to drive the lock tongue 2 to move, so that the lock tongue 2 is withdrawn from the battery lock opening 31, and then the battery can be removed". When installing the battery, the key is needed to drive the lock tongue to move and be inserted into the battery lock 31. During use, in order to avoid the battery from shaking, the lock tongue 2 needs to be tightly pressed against the battery lock opening 31, but it is difficult to achieve this with a key. To put it mildly, even if it is pressed tightly, it is difficult to pull out the key.

[0005] In Chinese Patent Application No. CN202010468129.0, previously applied by the applicant, a battery anti-theft structure of a shared electric scooter is disclosed, which includes an installation assembly installed on a vehicle frame, a battery assembly including a battery body and a handle, the handle being installed on the upper end of the battery body, a protection assembly including a protective cover, the protective cover being a U-shaped structure, a guide groove for supporting the battery body being provided in the protective cover, an installation through hole being provided on the protective cover, a battery lock penetrating the installation through hole being provided on the vehicle frame, a spring pin penetrating the protective cover, a lock release avoidance groove for the battery lock being provided on one side of the battery body, a battery insertion groove being provided at the bottom of the battery body, the installation assembly including a base fixedly installed on the vehicle frame, an installation groove being provided on the upper end of the base, a battery insertion piece being provided in the installation groove and being gap-fitted with the battery insertion groove, a hasp being provided in the lock release avoidance groove and being lap-fitted with the lock tongue of the battery lock, and the battery lock being obliquely arranged. Figure 7During long-time use, some customers feedback that the lock tongue of the electronic lock cannot be retracted, resulting in failure of the electronic lock. The applicant found through analysis that if the battery is to be prevented from shaking during use, the lock tongue needs to be pressed against the catch 108. However, the catch 108 will exert a force on the lock tongue in the opposite direction, causing the lock tongue to be pressed against the side wall of the upper through hole of the shell, resulting in the inability to retract the lock tongue. Excessive force on the lock tongue can also cause damage to the side wall of the upper through hole of the shell. In view of this, the applicant proposes further improvements to the previously applied patent. SUMMARY

[0006] To solve at least one aspect of the technical problem in the background art, the present application proposes a locking mechanism and an electric vehicle.

[0007] The locking mechanism proposed by the present application is used to lock a battery and comprises:

[0008] a support member;

[0009] a first rotating shaft;

[0010] a first connecting member rotatably connected to the support member through the first rotating shaft, the first connecting member having a first end and a second end, the first end being used to lockingly cooperate with the battery; wherein the force arm L2 of the second end is greater than the force arm L1 of the first end;

[0011] a lock comprising a lock tongue, the lock tongue cooperating with the second end.

[0012] Preferably, the locking mechanism further comprises:

[0013] a second rotating shaft;

[0014] a second connecting member rotatably connected to the support member through the second rotating shaft, the second connecting member having a third end and a fourth end, the third end being used to cooperate with the second end; wherein the force arm L4 of the fourth end is greater than the force arm L3 of the third end;

[0015] the lock tongue cooperates with the fourth end, wherein

[0016] when the locking mechanism is in a locked state, the fourth end abuts against the lock tongue, and the third end abuts against the second end, thereby preventing the first connecting member from rotating to lock the battery;

[0017] when the locking mechanism is unlocked from the locked state, the fourth end can move relative to the lock tongue, and the first connecting member can rotate under the action of an external force to unlock the battery.

[0018] Preferably, the locking mechanism further comprises a first elastic member, one end of the first elastic member is connected with or abuts against the support member, and the other end is connected with or abuts against the second connecting member, and the elastic force of the first elastic member causes the third end to have a tendency to move away from the second end.

[0019] Preferably, when the locking mechanism is in the locked state, the fourth end abuts against the side wall of the lock tongue.

[0020] Preferably, the lock further comprises:

[0021] a housing;

[0022] a sliding rod arranged in the housing;

[0023] a sliding block, wherein the sliding block and the lock tongue are in sliding connection with the sliding rod;

[0024] a spring sleeved on the sliding rod and connected with or abutting against the sliding block and the lock tongue at both ends;

[0025] an electric motor in transmission connection with the sliding block;

[0026] The locking mechanism further comprises an auxiliary member in rotational connection with the support member, and when the lock tongue is extended, the auxiliary member abuts against the inclined surface of the lock tongue, and the auxiliary member and the second connecting member are located on the movement path of the first connecting member, wherein:

[0027] During the battery locking process, when the first connecting member rotates to contact the auxiliary member, the auxiliary member is rotated, the auxiliary member extrudes the lock tongue to make the lock tongue retract, and then the fourth end is separated from the side wall of the lock tongue;

[0028] After the fourth end is separated from the side wall of the lock tongue, when the first connecting member rotates to contact the second connecting member, the second connecting member is rotated to make the second end abut against the third end again.

[0029] Preferably, the auxiliary member is rotatably installed on the second rotating shaft, and when the auxiliary member does not contact the first connecting member, one end of the auxiliary member close to the lock tongue abuts against the second connecting member, and the auxiliary member is located on the movement path of the lock tongue.

[0030] Preferably, the locking mechanism further comprises a torsional spring sleeved on the first rotating shaft, one end of the torsional spring abuts against the support member, and the other end abuts against the first connecting member, and the elastic force of the torsional spring causes the first connecting member to have a tendency to rotate and unlock the battery.

[0031] The application further discloses an electric vehicle, comprising:

[0032] A battery has a buckle;

[0033] A vehicle body is provided with a battery compartment, and the battery compartment is provided with a plug terminal for connecting with the bottom terminal of the battery;

[0034] The locking mechanism, wherein the support is arranged on the vehicle body.

[0035] The beneficial effects brought by one aspect of the present application are:

[0036] The present application reduces the pressure on the lock tongue by making the second end force arm L2 larger than the first end force arm L1, facilitating the smooth retraction of the lock tongue and the unlocking of the battery. It also avoids damage to the side wall of the through hole on the shell of the lock due to excessive force.

[0037] Stable fastening of the battery in the battery compartment can effectively solve the problem of battery damage caused by the jolt and vibration of the battery in the vehicle during use, which causes the displacement of the battery in the battery compartment and damages the parts in contact with the battery and the internal parts of the battery, eventually causing the damage of the battery and the vehicle.

[0038] The first connecting piece and the second connecting piece are ingeniously used to realize automatic locking by "pushing once" and automatic unlocking through the principle of lever and the mutual movement of the connecting pieces. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 A schematic diagram of the electric vehicle disclosed by the present application is shown;

[0040] Figure 2 A schematic diagram of the electric vehicle when the battery is locked disclosed by the present application is shown;

[0041] Figure 3 A schematic diagram of the electric vehicle when the battery is unlocked disclosed by the present application is shown;

[0042] Figure 4 A schematic diagram of part of the components when the battery is locked disclosed by the present application is shown;

[0043] Figure 5 A schematic diagram of the lock disclosed by the present application is shown; Figure 4 An enlarged schematic diagram of point P in the above figure is shown;

[0044] Figure 6 A schematic diagram of part of the components when the battery is unlocked disclosed by the present application is shown;

[0045] Figure 7 A schematic diagram of the lock disclosed by the present application is shown;

[0046] Figure 8 An exploded view of embodiment 1 disclosed by the present application is shown;

[0047] Figure 9 Axial view of the embodiment 1 disclosed in the present invention;

[0048] Figure 10 Axial view of the first connecting member of the embodiment 1 disclosed in the present invention;

[0049] Figure 11 Axial view of the second connecting member of the embodiment 1 disclosed in the present invention;

[0050] Figure 12 Cross-sectional view of the battery when being locked of the embodiment 1 disclosed in the present invention;

[0051] Figure 13 Cross-sectional view of the battery when being unlocked of the embodiment 1 disclosed in the present invention;

[0052] Figure 14 Cross-sectional view of the battery when being completely unlocked of the embodiment 1 disclosed in the present invention;

[0053] Figure 15 Cross-sectional view of the bolt when being re-extended of the embodiment 1 disclosed in the present invention;

[0054] Figure 16 Cross-sectional view of the battery when being locked of the embodiment 1 disclosed in the present invention;

[0055] Figure 17 Cross-sectional view of the bolt when being retracted of the embodiment 1 disclosed in the present invention;

[0056] Figure 18 Cross-sectional view of the bolt when being gradually retracted of the embodiment 1 disclosed in the present invention;

[0057] Figure 19 Cross-sectional view of the bolt when being completely retracted of the embodiment 1 disclosed in the present invention;

[0058] Figure 20 Axial view of the embodiment 2 disclosed in the present invention;

[0059] Figure 21 Exploded view of the embodiment 2 disclosed in the present invention;

[0060] Figure 22 Cross-sectional view of the battery when being locked of the embodiment 2 disclosed in the present invention;

[0061] Figure 23 Cross-sectional view of the battery when being unlocked of the embodiment 2 disclosed in the present invention;

[0062] Figure 24 Cross-sectional view of the battery after being unlocked of the embodiment 2 disclosed in the present invention;

[0063] Figure 25A sectional view of the lock tongue extension of the embodiment 2 disclosed by the present application;

[0064] Figure 26 A sectional view of the embodiment 3 disclosed by the present application. DETAILED DESCRIPTION

[0065] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict; the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0066] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left" and "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the indicated position or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0067] Embodiment 1, with reference to Figures 1-19 The present application proposes a locking mechanism for locking a battery, comprising:

[0068] A support 1 is used to support other components; a first rotating shaft 2 can be rotatably installed on the support 1.

[0069] A first connecting piece 3 is rotatably connected with the support 1 through the first rotating shaft 2, the first connecting piece 3 has a first end 301 and a second end 304, the first end 301 is used for locking and matching with the battery A, and the first connecting piece 3 can rotate; wherein, in combination Figure 5 The force arm L2 of the second end 304 is greater than the force arm L1 of the first end 301.

[0070] The locking mechanism further comprises:

[0071] A second rotating shaft 5; a second connecting member 6, which is rotatably connected to the support member 1 via the second rotating shaft 5, the second connecting member 6 having a third end 601 and a fourth end 602, the third end 601 being used to cooperate with the second end 304; the second connecting member 6 is rotatable; wherein, (the lever arm L4 of the fourth end 602 * the lever arm L2 of the second end 304) > (the lever arm L3 of the third end 601 * the lever arm L1 of the first end 301), preferably, in this embodiment, the lever arm L4 of the fourth end 602 is greater than the lever arm L3 of the third end 601.

[0072] A lock 4 includes a bolt 401, which engages with the fourth end 602, wherein,

[0073] Combination Figure 5 , 12 When the locking mechanism is in the locked state, the fourth end 602 abuts against the locking tongue 401, and the third end 601 abuts against the second end 304, thereby preventing the first connecting member 3 from rotating to lock the battery A.

[0074] Combination Figure 14 When the locking mechanism is unlocked from the locked state, the fourth end 602 can move relative to the locking tongue 401, and the first connecting member 3 can rotate under the action of external force to unlock the battery A.

[0075] Combination Figure 5 , 12 When in use, let the first end 301 abut against the buckle A01 on battery A, extend the locking tongue 401 to abut against the fourth end 602, and let the third end 601 abut against the second end 304 to prevent the first connector 3 and the second connector 6 from rotating, forming a balanced state and locking battery A.

[0076] During use, or when battery A is pulled outwards, battery A exerts a force on the first end 301, F1 being the force exerted by battery A on the first end 301; F2 being the force exerted by the third end 601 on the second end 304; F3 = F2, and F3 is the reaction force exerted by the second end 304 on the third end 601. F4 is the force exerted by the latch 401 on the fourth end 602, and the magnitude of the reaction force exerted by the latch 401 on the fourth end 602 is also F4.

[0077] According to the lever principle, F1*L1=F2*L2, F3*L3=F4*L4, therefore F4=(F1*L1*L3) / (L2*L4)

[0078] It can be seen that F4 is much smaller than F1, so the locking tongue 401 is subjected to a smaller force and can retract smoothly.

[0079] The size of L1, L2, L3 and L4 can be determined by the person skilled in the art according to the design of the specific vehicle model.

[0080] Of course, in another embodiment, L4 can be less than or equal to L3, and (L2*L4)>(L1*L3) can be met.

[0081] In combination with Figure 5 , 12 , 13, 14, in order to separate the third end 601 and the second end 304 in time when unlocking, facilitate the smooth separation of the first end 301 and the battery A, and facilitate the removal of the battery A.

[0082] In this embodiment, the locking mechanism further comprises a first elastic member 7, one end of the first elastic member 7 is connected with or abuts against the support member 1, and the other end is connected with or abuts against the second connecting member 6, and the elastic force of the first elastic member 7 makes the third end 601 have a tendency to move away from the second end 304. The first elastic member 7 can be a tension spring, one end of which is connected with the support member 1, and the other end of which is connected with the second connecting member 6. In order to better pull the second connecting member 6 to rotate, the tension spring can be connected with the fourth end 602.

[0083] In the locked state, the tension spring is in the stretched state

[0084] In combination with Figure 13 , when unlocking, the lock tongue 401 is retracted, the second connecting member 6 rotates counterclockwise under the elastic force of the tension spring, the third end 601 is separated from the second end 304, and the first connecting member 3 can rotate freely. The user can smoothly separate the battery A from the first end 301 and remove the battery A.

[0085] In combination with Figure 12 , when the locking mechanism is in the locked state, the fourth end 602 abuts against the side wall of the lock tongue 401. The force of the fourth end 602 on the lock tongue 401 is applied to the side wall of the lock tongue 401, Figure 12 , the force on the lock tongue 401 is basically horizontal, avoiding being applied to the inclined surface of the lock tongue 401. When a larger external force is applied to the battery A, the lock tongue 401 is pressed back, which can effectively prevent theft. Unless the structure is damaged, it is difficult to remove the battery A in the locked state of the battery A.

[0086] This embodiment proposes a lock 4 structure, in combination with Figure 7 , specifically, the lock 4 further comprises:

[0087] A shell 402 can be arranged on the support 1; a sliding rod 403 is arranged in the shell 402; a sliding block 404, wherein the sliding block 404 and the lock tongue 401 are in sliding connection with the sliding rod 403; a spring 405 is sleeved on the sliding rod 403, and the two ends thereof are connected with or abut against the sliding block 404 and the lock tongue 401 respectively; a motor 406 is in driving connection with the sliding block 404. The motor 406 can be connected with the control system of the electric vehicle, and can be connected with the control system by using the mobile phone APP, so as to realize automatic control of locking and unlocking by using the mobile phone APP. The applicant adopts the lock produced by Yake Te (Tianjin) Electronics Technology Co., Ltd., for example, the technology with the application number CN201711302304.3 can be adopted.

[0088] The motor 406 drives the sliding block 404 to move, and the spring 405 drives the lock tongue 401 to extend or retract.

[0089] Of course, in other embodiments, the lock 4 can have other structures.

[0090] In order to realize automatic locking of the battery, the locking mechanism further comprises an auxiliary part 8, the auxiliary part 8 is in rotational connection with the support 1, when the lock tongue 401 extends, the auxiliary part 8 abuts against the inclined surface of the lock tongue 401, Figure 12 The auxiliary part 8 and the second connecting part 6 are located on the movement path of the first connecting part 3.

[0091] During the locking process of the battery A, when the first connecting part 3 rotates to contact the auxiliary part 8, the auxiliary part 8 is driven to rotate, the auxiliary part 8 extrudes the lock tongue 401 to make the lock tongue 401 retract, and then the fourth end 602 is separated from the side wall of the lock tongue 401.

[0092] After the fourth end 602 is separated from the side wall of the lock tongue 401, when the first connecting part 3 rotates to contact the second connecting part 6, the second connecting part 6 is driven to rotate, so that the second end 304 abuts against the third end 601 again.

[0093] Specifically, in the embodiment, the auxiliary part 8 is rotatably installed on the second rotating shaft 5; when the auxiliary part 8 does not contact the first connecting part 3, one end of the auxiliary part 8 close to the lock tongue 401 abuts against the second connecting part 6, and the auxiliary part 8 is located on the movement path of the lock tongue 401. Figure 12 As shown in the figure.

[0094] In order to realize automatic unlocking, automatic pushing out of the battery A, the locking mechanism further comprises a second elastic member, one end of the second elastic member is connected with or abuts against the support member 1, and the other end is connected with or abuts against the first connecting member 3, and the elastic force of the second elastic member makes the first connecting member 3 have a tendency to rotate and in turn unlock the battery A.

[0095] Specifically, the second elastic member is a torsion spring 9, the torsion spring 9 is sleeved on the first rotating shaft 2, one end of the torsion spring 9 abuts against the support member 1, and the other end abuts against the first connecting member 3. The torsion spring 9 exerts a force on the first connecting member 3, so that the first connecting member 3 has a tendency to rotate counterclockwise.

[0096] Figure 12 As shown, the present embodiment is in a locked state.

[0097] Figure 13 As shown, the motor 406 drives the sliding block 404 to retract, and the spring 405 pulls the lock tongue 401 to retract. Under the action of the first elastic member 7, the second connecting member 6 rotates counterclockwise, and the third end 601 is separated from the second end 304.

[0098] Figure 3 、 14 As shown, under the elastic force of the torsion spring 9, the first connecting member 3 is driven to rotate counterclockwise, and the battery A is pushed out through the first end 301, realizing automatic pushing out of the battery A and being more automated. The user can directly lift the battery A.

[0099] In combination Figure 15 , after the motor 406 drives the lock tongue 401 to retract, it will generally drive the lock tongue 401 to extend again after about 2 seconds, as shown in Figure 15 The side wall of the lock tongue 401 abuts against the fourth end 602, and the inclined surface abuts against the auxiliary member 8.

[0100] In combination Figure 16 When locking, make the hasp A01 on the battery A abut against the first end 301. Push the battery A inward. The battery A presses the first end 301, and drives the first connecting member 3 to rotate clockwise.

[0101] In combination Figure 17 When the second end 304 contacts the auxiliary member 8, the auxiliary member 8 is driven to rotate counterclockwise, and the auxiliary member 8 presses the inclined surface of the lock tongue 401, so that the lock tongue 401 retracts against the elastic force of the spring 405.

[0102] In combination Figure 18 As the battery A continues to lock, the first connecting member 3 continues to rotate clockwise, the second end 304 of the first connecting member 3 abuts against the second connecting member 6, and the second connecting member 6 is driven to rotate counterclockwise until the first connecting member 3 is separated from the second connecting member 6, as shown in 19.

[0103] Under the action of spring 405, locking tongue 401 extends, overcomes the elastic force of first elastic element 7, and pushes second connecting element 6 and auxiliary element 8 to rotate clockwise until third end 601 abuts against second end 304 again, as shown in 12. At this time, battery A is locked again.

[0104] As can be seen, in this embodiment, when it is necessary to remove battery A, the motor 406 is controlled to retract, causing the locking tongue 401 to retract. After unlocking, battery A is automatically ejected under the action of the first elastic member 7 and the second elastic member.

[0105] After approximately 2 seconds, motor 406 automatically extends the bolt 401 back to its original position. Motor 406 can be based on existing equipment, such as the locks manufactured by Acote (Tianjin) Electronic Technology Co., Ltd., used by the applicant.

[0106] When it is necessary to reinstall battery A, make the buckle A01 of battery A abut against the first end 301, push battery A inward, and battery A will lock automatically.

[0107] Assuming auxiliary component 8 is not set, such as Figure 15 As shown, when locking is required, the second connector 6 abuts against the side wall of the latch 401. When the first connector 3 contacts the second connector 6, it cannot rotate the second connector 6. The motor 406 must be used again to retract the latch 401. After locking with battery A, the latch 401 must be extended again. This process requires multiple operations.

[0108] In this embodiment, only one unlocking operation is required. The motor 406 drives the locking tongue 401 to retract once, and the battery A can automatically lock afterward, making the operation more convenient.

[0109] Furthermore, when the locking mechanism is in the locked state, the first end 301 abuts against the support member 1. Figure 4 , 12 As shown, when locked, the first connector 3 is restricted by the battery A and the support 1 to prevent shaking and ensure effective pressure on the battery A to prevent it from shaking.

[0110] To better secure battery A, the first end 301 is provided with a first slot that matches the latch A01 on battery A. Figure 8 In another implementation, A01 can be directly installed in conjunction with the first slot.

[0111] Furthermore, the first end 301 is provided with a wear-resistant part 10, and the wear-resistant part 10 is provided with a second slot 1001 that is adapted to the buckle A01 on the battery A.

[0112] The first connecting piece 3 in the embodiment can be made of aluminum alloy to reduce weight. To avoid wear and tear, a wear-resistant piece 10 can be provided, which can be made of stainless steel. The stainless steel is installed at the first end 301, and the second clamping groove 1001 is matched with the buckle A01 on the battery A. The first end 301 is prevented from being excessively worn. As shown in Figure 15

[0113] Further, the first connecting piece 3 further has an elastic part 302 and a middle part 303, the first end 301 is connected with the middle part 303 through the elastic part 302, and the middle part 303 is connected with the second end 304; wherein the middle part 303 is rotationally connected with the first rotating shaft 2; the elastic part 302 can be deformed, and through the arrangement of the elastic part 302, the distance between the first end 301 and the middle part 303 can be adjusted; the locking mechanism further comprises an adjusting piece 11 for adjusting the distance between the first end 301 and the middle part 303. The adjusting piece 11 comprises a bolt, the bolt is threadedly connected with the middle part 303 and abuts against the first end 301.

[0114] To make up for production errors, installation errors and use errors. When it is found that there is a distance between the buckle A01 on the battery A and the second clamping groove 1001, and the battery A shakes during locking, the bolt can be rotated to press the first end 301 downward, so that the second clamping groove 1001 and the buckle A01 abut again, thereby effectively preventing the battery A from shaking.

[0115] Embodiment 2: in combination Figures 20-25 with embodiment 1, the difference between the embodiment and embodiment 1 is that the embodiment does not provide an auxiliary piece 8, and the fourth end 602 in the embodiment abuts against the inclined surface of the lock tongue 401.

[0116] In use, the buckle A01 on the battery A is matched with the second clamping groove 1001.

[0117] In combination Figure 22 , the structure is in a locked state.

[0118] In combination Figure 23 , when unlocking is needed, an instruction is issued to drive the lock tongue 401 to retract by using the motor 406. Under the elastic force of the first elastic piece 7, the second connecting piece 6 rotates counterclockwise.

[0119] In combination Figure 24 , under the action of the second elastic piece, the first connecting piece 3 rotates counterclockwise to automatically pop out the battery A.

[0120] Figure 25 As shown in the figure, the motor 406 drives the lock tongue 401 to extend again.

[0121] ​When the battery A is locked, let the battery A re-against the second slot 1001. Push the battery A inward. The first connecting piece 3 is driven to rotate clockwise. The first connecting piece 3 drives the second connecting piece 6 to rotate counterclockwise. The fourth end 602 extrudes the lock tongue 401, and the lock tongue 401 is retracted.

[0122] When the first connecting piece 3 and the second connecting piece 6 are separated, the lock tongue 401 is again extruded under the action of the spring 405, overcoming the elastic force of the first elastic piece 7, so that the third end 601 and the second end 304 are against each other, and the battery A is in a locked state.

[0123] In this embodiment, only one operation is needed to automatically unlock and lock the battery A.

[0124] Embodiment 3, in combination Figure 26 , compared with embodiment 2, the first elastic piece 7, the second connecting piece 6, and the auxiliary piece 8 are not provided, and the lock tongue 401 is directly against the second end 304.

[0125] When unlocking, the lock tongue 401 is retracted. The second elastic piece is automatically popped out.

[0126] When locking, after the battery A is installed, the lock tongue 401 is again extruded.

[0127] The battery A in this embodiment can be different from embodiments 1 and 2, and the structure in the prior art can be used.

[0128] If the same structure as embodiments 1 and 2 is used, it is only necessary to satisfy that when locking, the first connecting piece 3 can drive the lock tongue 401 to retract, and when separated from the lock tongue 401, the lock tongue 401 is again extruded under the elastic force of the spring 405, and the second end 304 is against the side wall of the lock tongue 401.

[0129] Embodiment 4, the main difference between this embodiment and embodiments 1 or 2 is:

[0130] The force arm L2 of the second end is not greater than the force arm L1 of the first end, and L2 can be less than or equal to L1; (the force arm L4 of the fourth end * the force arm L2 of the second end) > (the force arm L3 of the third end * the force arm L1 of the first end), and (L4*L2) > (L3*L1) is required. Reduce the pressure on the lock tongue, and facilitate retraction.

[0131] Embodiment 5, in combination Figure 1 , 2 , 3, an electric vehicle, comprising:

[0132] A battery A has a buckle A01; a vehicle body B, which is provided with a battery compartment B01, the battery compartment B01 is provided with a connector terminal for connecting with the bottom terminal of the battery A; the embodiment also includes the locking mechanism of embodiments 1, 2 or 3 or 4, wherein the support 1 is arranged on the vehicle body B. The embodiment effectively realizes the automatic locking and unlocking of the battery A, avoids the failure of the locking tongue 401 to retract, and avoids the damage of the shell caused by excessive force on the locking tongue 401.

[0133] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacements or changes within the technical range disclosed by the present application according to the technical solution and the inventive concept of the present application, which should be covered within the protection scope of the present application.

Claims

1. A locking mechanism for locking a battery, characterized by, The utility model relates to a battery locking mechanism, comprising: a support; a first rotating shaft; a first connecting piece, which is rotatably connected with the support through the first rotating shaft, has a first end and a second end, and the first end is used for locking cooperation with the battery; wherein the force arm L2 of the second end is not greater than the force arm L1 of the first end; a second rotating shaft; a second connecting piece, which is rotatably connected with the support through the second rotating shaft, has a third end and a fourth end, and the third end is used for cooperation with the second end; wherein (the force arm L4 of the fourth end * the force arm L2 of the second end) > (the force arm L3 of the third end * the force arm L1 of the first end); a lock, comprising a lock tongue, wherein the lock tongue cooperates with the fourth end, and when the locking mechanism is in the locked state, the fourth end abuts against the lock tongue, and the third end abuts against the second end, so as to prevent the first connecting piece from rotating to lock the battery; when the locking mechanism is unlocked from the locked state, the fourth end can move relative to the lock tongue, and the first connecting piece can rotate under the action of external force to unlock the battery; in use, the first end abuts against the buckle on the battery, the extended lock tongue abuts against the fourth end, the third end abuts against the second end, the first connecting piece and the second connecting piece are prevented from rotating, a balance state is formed, and the battery is locked; the locking mechanism further comprises a first elastic piece, one end of the first elastic piece is connected with or abuts against the support, the other end is connected with or abuts against the second connecting piece, and the elastic force of the first elastic piece makes the third end have a tendency to move away from the second end; the locking mechanism further comprises a torsion spring, the torsion spring is sleeved on the first rotating shaft, one end of the torsion spring abuts against the support, the other end abuts against the first connecting piece, and the elastic force of the torsion spring makes the first connecting piece have a tendency to rotate to unlock the battery.

2. The locking mechanism of claim 1, wherein, when the locking mechanism is in the locked state, the fourth end abuts against the side wall of the lock tongue.

3. The locking mechanism of claim 2, wherein, the lock further comprises: a housing; a sliding rod arranged in the housing; a sliding block, wherein the sliding block and the lock tongue are both in sliding connection with the sliding rod; a spring, which is sleeved on the sliding rod and has two ends connected with or abutting against the sliding block and the lock tongue respectively; a motor in transmission connection with the sliding block.

4. The locking mechanism of claim 3, wherein, the locking mechanism further comprises an auxiliary piece, which is rotatably installed on the second rotating shaft, abuts against the inclined surface of the lock tongue when the lock tongue is extended, and is located in the movement path of the first connecting piece together with the second connecting piece, wherein during the locking process of the battery, when the first connecting piece rotates to contact the auxiliary piece, the auxiliary piece is driven to rotate, the auxiliary piece extrudes the lock tongue to make the lock tongue retract, and then the fourth end is separated from the side wall of the lock tongue; after the fourth end is separated from the side wall of the lock tongue, when the first connecting piece rotates to contact the second connecting piece, the second connecting piece is driven to rotate to make the second end abut against the third end again. When the auxiliary member is not in contact with the first connecting member, the auxiliary member is in abutment with the second connecting member near one end of the lock tongue, and the auxiliary member is in the moving path of the lock tongue.

5. An electric vehicle characterized by comprising: Comprise: A battery has a buckle; A vehicle body, which is provided with a battery compartment, and the battery compartment is provided with a plug terminal for connecting with the bottom terminal of the battery; The locking mechanism of any one of claims 1-4, wherein The support is arranged on the vehicle body.

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