CN220895747U

CN220895747U - Lock body assembly, battery pack, locking mechanism, locking and unlocking device and vehicle

Info

Publication number: CN220895747U
Application number: CN202322831042.7U
Authority: CN
Inventors: 贾金龙; 杨潮; 周肖鸿; 张宁; 郑飞飞; 靖海涛
Original assignee: Weilai Automobile Technology Anhui Co Ltd
Current assignee: Weilai Automobile Technology Anhui Co Ltd
Priority date: 2023-10-20
Filing date: 2023-10-20
Publication date: 2024-05-03
Anticipated expiration: 2033-10-20

Abstract

The utility model relates to the technical field of electric automobiles, in particular to a lock body assembly, a battery pack, a locking mechanism, a locking and unlocking device and a vehicle. The utility model aims to solve the problems of low efficiency and poor reliability of the existing power conversion mode. For this purpose, the lock body assembly of the utility model comprises a mounting seat with a cylindrical structure, the bottom of which is open, and the top of which is provided with a mounting hole; the connecting piece is provided with a connecting part and a fastening part which are connected with each other, one end of the connecting part is provided with threads and extends into the mounting seat through the mounting hole, the other end of the connecting part is connected with the fastening part, and the connecting piece can rotate around the axis of the connecting piece, so that the fastening part can rotate a first position and a second position; the nut is in threaded connection with one end of the connecting part extending into the mounting seat; and the anti-loosening piece is sleeved on the connecting part and positioned between the nut and the top inner wall of the mounting seat, and is extruded between the nut and the top inner wall of the mounting seat when the nut is screwed down. The utility model can improve the efficiency of the power exchanging process and the reliability of the lock body assembly.

Description

Lock body assembly, battery pack, locking mechanism, locking and unlocking device and vehicle

Technical Field

The utility model relates to the technical field of electric automobiles, in particular to a lock body assembly, a battery pack, a locking mechanism, a locking and unlocking device and a vehicle.

Background

In recent years, with the rapid increase of sales of new energy automobiles, the demand of energy supplementing services for users is also increasing. Taking a pure electric vehicle as an example, compared with a charging energy supplementing mode, the charging energy supplementing mode can be completed in a short time generally, so that the energy supplementing efficiency is improved to a great extent, and the method is one of the energy supplementing directions of national important development.

For power exchange, how to complete battery exchange in a shorter time is an important index for determining whether the power exchange scheme can be popularized and used in a large area. Most of power batteries in the existing market are fastened on a chassis of a vehicle through fasteners such as bolts, the bolts are required to be completely unlocked from the chassis of the vehicle in the power conversion process, the power batteries can be detached, and otherwise the bolts are required to be completely fastened, so that the power batteries can be locked. However, the locking and unlocking modes have the defects that the locking and unlocking processes of the bolts are long, the whole power-changing time is influenced, the bolts are frequently locked and unlocked, the abrasion of the bolts is accelerated, the actual effect probability of the bolts is improved, and the reliability of the bolts is reduced.

Accordingly, there is a need in the art for a new solution to the above-mentioned problems.

Disclosure of utility model

In order to solve at least one of the foregoing problems in the prior art, that is, to solve the problems of low efficiency and poor reliability existing in the existing power conversion method, the first aspect of the present application provides a lock body assembly, which includes:

The mounting seat is of a cylindrical structure, the bottom of the mounting seat is open, and the top of the mounting seat is provided with a mounting hole;

A connecting member having a connecting portion and a fastening portion connected to each other, one end of the connecting portion being provided with threads and extending from the mounting hole into the mounting seat, the other end of the connecting portion being connected to the fastening portion, the connecting member being provided to be rotatable about its own axis so that the fastening portion can be rotated to a first position for disengagement of a target fastener from the fastening portion, and a second position for connection of the target fastener to the fastening portion;

the nut is in threaded connection with one end of the connecting part extending into the mounting seat;

The anti-loose piece is sleeved on the connecting part and located between the nut and the top inner wall of the mounting seat, and is arranged to be extruded between the nut and the top inner wall of the mounting seat when the nut is screwed down.

The lock body assembly can reduce the power conversion time, improve the power conversion efficiency, avoid the screw thread effect and ensure the connection reliability on the premise of ensuring the effective locking of the battery. Specifically, the detachment and connection between the to-be-fastened piece and the target fastening piece are realized by adopting the mode that the fastening part rotates to the first position and the second position, and the detachment and fastening of the battery can be realized by rotating the fastening part on the basis of realizing the locking and detachment of the battery, so that the complete detachment of the connecting part and the nut is not required in the locking and unlocking process, and the inventor experiment verifies that the fastening part can rotate between the first position and the second position by only unscrewing the nut for 1-2 circles at least, thereby greatly reducing the time length of the replacement in the unlocking and locking processes and avoiding the damage failure caused by frequent detachment of the screw thread. Through setting up the locking piece, can realize locking between connecting piece and the nut after the nut is screwed up, avoid the connecting piece pine of in-process such as vibration to improve the connection reliability of lock body subassembly.

In the above preferred technical solution of the lock assembly, the fastening portion includes at least two rod bodies formed by extending the end portions of the connecting portion outwards, and an included angle is formed between an axis of the rod body and an axis of the connecting portion.

In a preferred technical solution of the lock body assembly, the fastening portion includes two rod bodies, and the two rod bodies extend in opposite directions to each other and form a T-shaped rod with the connecting portion.

In the preferred technical scheme of the lock body assembly, one side of the rod body, which is far away from the mounting seat, is arc-shaped.

The arrangement mode can provide guidance when the rod body rises, and improves the trafficability of the rod body when passing through the through hole.

In the preferable technical scheme of the lock body assembly, the width of the rod body gradually increases along the direction away from the connecting part; and/or

One end of the rod body, which is far away from the connecting part, is outwards extended along the width direction of the rod body to form a protruding structure.

By the arrangement mode, the bearing area of the rod body can be increased, and the connection reliability of the lock body assembly is further improved.

In the preferred technical scheme of the lock body assembly, a first limiting structure is arranged at the top of the mounting seat and is arranged to allow one side, facing the mounting seat, of the fastening portion to be embedded in the first limiting structure.

According to the arrangement mode, through the arrangement of the first limiting structure, the fastening portion can be embedded in the first limiting structure to position the fastening portion, and positioning accuracy of the fastening portion is improved.

In the preferable technical scheme of the lock body assembly, the first limiting structure is a limiting groove; and/or

The first limiting structure is integrally formed with the mounting seat.

In the preferred technical scheme of the lock body assembly, the lock body assembly further comprises a reset spring, wherein the reset spring is arranged in the mounting seat, and two ends of the reset spring are respectively abutted to the nut and the top inner wall of the mounting seat.

According to the arrangement mode, the recovery of the fastening part can be realized through the reset spring, and the fastening part can be quickly seated.

In the preferable technical scheme of the lock body assembly, the return spring is a conical spring; and/or

One end of the return spring is abutted to the nut through a spring seat.

In the preferable technical scheme of the lock body assembly, an annular step surface is formed on the outer peripheral side of the nut, and one end of the return spring is abutted against the annular step surface; or alternatively

One side of the nut, which faces to the inner wall of the top of the mounting seat, is provided with an annular groove, and one end of the reset spring is abutted to the annular groove.

In the preferred technical scheme of the lock body assembly, the locking piece comprises a first gasket and a second gasket, the first gasket is annular and sleeved on the connecting portion, a first radial convex line is formed on the upper surface of the first gasket, a first wedge-shaped surface is formed on the lower surface of the first gasket along the circumferential direction, the second gasket is annular and sleeved below the first gasket, a second radial convex line is formed on the lower surface of the second gasket, a second wedge-shaped surface matched with the first wedge-shaped surface is formed on the upper surface of the second gasket along the circumferential direction, when the nut is screwed, the first radial convex line and the top inner wall of the mounting seat are mutually extruded, the second radial convex line and the nut are mutually extruded, and the first wedge-shaped surface and the second wedge-shaped surface are mutually extruded.

The anti-loosening piece adopts the arrangement mode of the first gasket and the second gasket, so that when the connecting piece is loosened, the wedge-shaped faces of the first gasket and the second gasket relatively rotate to generate lifting tension to prevent the connecting piece from loosening, and the anti-loosening effect is improved.

In a preferred technical scheme of the lock body assembly, the anti-loose piece is a gasket.

In the preferable technical scheme of the lock body assembly, the roughness of the upper surface of the gasket is larger than that of the lower surface of the gasket; or alternatively

The gasket is fixedly connected to the inner wall of the top of the mounting seat.

In the preferred technical scheme of the lock body assembly, the nut is a locknut.

Through the combination of the gasket and the locknut, the locking effect can be further improved, and the reliability of the lock body assembly is improved.

In a second aspect of the present application, there is provided a battery pack comprising a housing having the lock body assembly of any one of the first aspects disposed thereon.

According to the battery pack, the lock body assembly is arranged on the shell, so that the replacement time of the battery pack can be reduced, the electricity replacement efficiency is improved, the screw thread type is avoided being small, and the connection reliability of the battery pack is ensured.

In a third aspect of the application, there is provided a locking mechanism comprising a locking assembly and a lock body assembly according to any one of the first aspects, the lock body assembly being cooperatively associated with the locking assembly.

According to the locking mechanism, the lock body assembly is matched and connected with the locking assembly, so that the disassembly and assembly time between the lock body assembly and the locking assembly can be reduced, the disassembly and assembly efficiency is improved, and the connection reliability between the lock body assembly and the locking assembly can be ensured after the lock body assembly and the locking assembly are connected.

In a preferred technical solution of the above locking mechanism, the locking assembly includes a bracket, and the bracket is provided with a via hole, the via hole allows the fastening portion to pass through, the fastening portion can pass through the via hole when the fastening portion is in the first position, and the fastening portion cannot pass through the via hole when the fastening portion is in the second position.

In a preferred embodiment of the above locking mechanism, the locking assembly further includes a second limiting structure disposed on the bracket and configured to limit the fastening portion when the fastening portion is rotated to the first position and/or the second position.

According to the arrangement mode, through the arrangement of the second limiting structure, the rotating position accuracy of the fastening part can be improved, and the electricity changing precision is improved.

In a preferred technical solution of the above locking mechanism, the second limiting structure is a limiting projection, the limiting projection has a first abutting surface and a second abutting surface, the fastening portion abuts against the first abutting surface when rotating to the first position, and abuts against the second abutting surface when rotating to the second position.

In the above preferable technical scheme of the locking mechanism, the two limit bumps are arranged along the diagonal direction of the via hole, and the first abutting surface of the limit bump is flush with the side wall of the via hole.

In the preferable technical scheme of the locking mechanism, the second limiting structure is integrally formed with the bracket or fixedly connected with the bracket through a fastener.

In a preferred technical solution of the above locking mechanism, the locking assembly further includes a clamping member detachably mounted on the bracket, so that the fastening portion is clamped to the clamping member when rotated to the second position.

Through setting up the joint spare for the fastening portion all clamps at every turn and puts on the joint spare, reduces the wearing and tearing to the support, and the setting up mode that the joint spare can dismantle the connection makes and conveniently changes the joint spare after the joint spare wears to a certain extent.

In the preferable technical scheme of the locking mechanism, a mounting groove is formed on the bracket, and the clamping piece is embedded in the mounting groove; and/or

The clamping piece is a metal block.

In a preferred technical solution of the above locking mechanism, the locking assembly further includes a housing, and the housing is fixedly connected to the bracket and covers the via hole.

Through setting up the housing, can separate the internal and external environment of housing, prevent that foreign matter such as mud, sand in the environment from getting into locking subassembly inside, lead to the moment of torsion decay, improve connection stability.

In a fourth aspect of the present application, there is provided a locking and unlocking device comprising a drive mechanism and a locking and unlocking sleeve, the drive mechanism being in driving connection with the locking and unlocking sleeve, the locking and unlocking sleeve being arranged to be capable of mating connection with the nut, a docking piece being provided within the locking and unlocking sleeve, the docking piece being arranged to be capable of mating with the bottom of the connection in the lock body assembly of any one of the first aspects, such that the connection follows the rotation of the locking and unlocking sleeve when the nut is unscrewed.

According to the locking and unlocking device, the butt joint piece is arranged, so that the butt joint piece can assist the connecting part to rotate in the nut unscrewing process, the connecting part is rotated along with the rotation, the connecting part is prevented from rotating to fail due to the fact that the connecting part is driven to rotate by the nut, and the stability of the locking and unlocking process is improved.

In the preferable technical scheme of the locking and unlocking device, the butt joint piece is a permanent magnet top core arranged in the locking and unlocking sleeve; or alternatively

The butt joint piece is a top core arranged in the locking and unlocking sleeve, and a flower tooth structure is formed at the top of the top core.

The butt joint piece is arranged as a permanent magnet top core, and can drive the connecting part to rotate along with the magnetic force; the top of the top core is provided with a spline structure, and the connecting part can be driven to rotate along with the friction force.

In the above preferred technical scheme of the locking and unlocking device, the permanent magnet top core comprises a cylinder and a top plate, a first pin hole is formed in the cylinder, a second pin hole is formed in the locking and unlocking sleeve, and the cylinder is connected with the locking and unlocking sleeve through a first pin shaft.

In the above preferred technical scheme of the locking and unlocking device, the first pin hole is a long hole, the first pin shaft can move along the hole length direction of the long hole, the locking and unlocking device further comprises a first compression spring, and two ends of the first compression spring are respectively abutted between the top plate and the locking and unlocking sleeve.

In a fifth aspect of the present application, there is provided a vehicle including a vehicle body, a battery pack, and the locking mechanism of any one of the third aspects, the battery pack being connected to the vehicle body by the locking mechanism.

According to the vehicle, the battery pack of the vehicle is connected with the vehicle body by adopting the locking mechanism, so that the battery pack dismounting speed in the power conversion process can be improved, the power conversion efficiency is improved, and the locking mechanism also has good connection reliability.

Scheme 1. A lock body assembly, its characterized in that, the lock body assembly includes:

The lock body assembly according to claim 1, wherein the fastening portion includes at least two rod bodies formed by extending the end portions of the connecting portion outward, and an included angle is formed between the axis of the rod body and the axis of the connecting portion.

The lock body assembly according to claim 2, wherein the fastening portion includes two rod bodies extending opposite to each other and forming a T-shaped rod with the connecting portion.

The lock body assembly according to claim 2, wherein the side of the rod body away from the mounting seat is arc-shaped.

The lock body assembly according to claim 2, wherein the width of the rod body gradually increases in a direction away from the connecting portion; and/or

The lock body assembly according to claim 1, wherein a first limit structure is provided at the top of the mount, the first limit structure being configured to allow a side of the fastening portion facing the mount to be embedded therein.

The lock body assembly according to claim 6, wherein the first limiting structure is a limiting groove; and/or

The first limiting structure is integrally formed with the mounting seat.

The lock body assembly according to the scheme 8 is characterized by further comprising a reset spring, wherein the reset spring is arranged in the mounting seat, and two ends of the reset spring are respectively abutted to the nut and the inner wall of the top of the mounting seat.

The lock body assembly according to claim 8, wherein the return spring is a conical spring; and/or

One end of the return spring is abutted to the nut through a spring seat.

The lock body assembly according to claim 8, wherein an annular step surface is formed outwardly of the outer peripheral side of the nut, and one end of the return spring abuts against the annular step surface; or alternatively

The lock body assembly according to claim 1, wherein the locking member comprises a first gasket and a second gasket, the first gasket is annular and sleeved on the connecting portion, a first radial convex pattern is formed on the upper surface of the first gasket, a first wedge surface is formed on the lower surface of the first gasket along the circumferential direction, the second gasket is annular and sleeved below the first gasket, a second radial convex pattern is formed on the lower surface of the second gasket, a second wedge surface matched with the first wedge surface is formed on the upper surface of the second gasket along the circumferential direction, when the nut is screwed down, the first radial convex pattern and the top inner wall of the mounting seat are mutually extruded, the second radial convex pattern and the nut are mutually extruded, and the first wedge surface and the second wedge surface are mutually extruded.

The lock assembly of claim 1, wherein the locking element is a washer.

The lock body assembly of claim 12, wherein the upper surface of the gasket has a roughness greater than the roughness of the lower surface thereof; or alternatively

The lock body assembly of claim 12, wherein the nut is a locknut.

Scheme 15. A battery pack, characterized in that it comprises a housing on which the lock body assembly according to any one of schemes 1-14 is arranged.

A locking mechanism comprising a locking assembly and a lock body assembly according to any one of claims 1 to 14, the lock body assembly being cooperatively associated with the locking assembly.

The locking mechanism of claim 16, wherein the locking assembly comprises a bracket having a via opening therein, the via allowing the fastening portion to pass therethrough, the fastening portion being capable of passing therethrough when the fastening portion is in the first position, the fastening portion being incapable of passing therethrough when the fastening portion is in the second position.

The locking mechanism of claim 17, wherein the locking assembly further comprises a second limiting structure disposed on the bracket and configured to limit the securing portion when the securing portion is rotated to the first position and/or the second position.

The locking mechanism of claim 19, wherein the second limiting structure is a limiting protrusion, the limiting protrusion has a first abutment surface and a second abutment surface, the fastening portion abuts against the first abutment surface when rotated to the first position, and the fastening portion abuts against the second abutment surface when rotated to the second position.

The locking mechanism of claim 19, wherein two of the limit bumps are disposed along a diagonal direction of the via, and the first abutment surface of the limit bump is flush with the sidewall of the via.

The locking mechanism of claim 18, wherein the second limiting structure is integrally formed with the bracket or fixedly connected to the bracket by a fastener.

The locking mechanism of claim 17, wherein the locking assembly further comprises a catch removably mounted to the bracket such that the securing portion snaps into place upon rotation to the second position.

The locking mechanism according to claim 22, wherein the bracket is formed with a mounting groove, and the clip is embedded in the mounting groove; and/or

The clamping piece is a metal block.

The locking mechanism of claim 17, wherein the locking assembly further comprises a housing fixedly coupled to the bracket and covering the via.

A locking and unlocking device according to claim 25, characterized in that the locking and unlocking device comprises a driving mechanism and a locking and unlocking sleeve, the driving mechanism is in transmission connection with the locking and unlocking sleeve, the locking and unlocking sleeve is arranged to be capable of being in fit connection with the nut, a butt joint piece is arranged inside the locking and unlocking sleeve, and the butt joint piece is arranged to be capable of being matched with the bottom of the connecting part in the lock body assembly according to any one of claims 1-14, so that the connecting part follows the locking and unlocking sleeve to rotate when the nut is unscrewed.

The locking and unlocking device according to claim 25, wherein the butt joint member is a permanent magnet top core arranged in the locking and unlocking sleeve; or alternatively

The device according to claim 26, wherein the permanent magnet top core comprises a cylinder and a top plate, a first pin hole is formed in the cylinder, a second pin hole is formed in the locking and unlocking sleeve, and the cylinder is connected with the locking and unlocking sleeve through a first pin shaft.

The locking and unlocking device according to claim 27, wherein the first pin hole is a long hole, the first pin shaft can move along the length direction of the long hole, the locking and unlocking device further comprises a first compression spring, and two ends of the first compression spring are respectively abutted between the top plate and the locking and unlocking sleeve.

A vehicle comprising a body, a battery pack, and a locking mechanism of any one of claims 16 to 24, the battery pack being connected to the body by the locking mechanism.

Drawings

The present application is described below with reference to the accompanying drawings. In the accompanying drawings:

FIG. 1 is a diagram showing the cooperation of a locking mechanism and a locking and unlocking device of the present application;

FIG. 2 is an exploded view of the lock body assembly of the present application;

FIG. 3 is a cross-sectional view of the lock body assembly of the present application;

FIG. 4 is a block diagram of the locking element of the present application;

FIG. 5 is an exploded view of the locking assembly of the present application;

FIG. 6 is a diagram of an assembly process of the lock body assembly and locking assembly of the present application;

FIG. 7 is a diagram of an assembly process of the lock body assembly and the locking assembly of the present application (II);

FIG. 8 is a cross-sectional view of a lock body assembly in an alternative embodiment of the present application;

Fig. 9 is a cross-sectional view of fig. 1.

List of reference numerals

10. A lock body assembly; 11. a mounting base; 111. a mounting hole; 112. a first limit structure; 12. a connecting piece; 121. a connection part; 122. a fastening part; 13. a nut; 14. a locking piece; 141. a first gasket; 1411. a first radial rib; 1412. a first wedge surface; 142. a second gasket; 1421. a second radial rib; 1422. a second wedge surface; 15. a return spring; 16. a spring seat; 17. a permanent magnet;

20. A locking assembly; 21. a bracket; 211. a via hole; 212. a second limit structure; 213. a mounting groove; 22. a clamping piece; 23. a housing;

30. Locking and unlocking devices; 31. locking and unlocking the sleeve; 311. a sleeve structure; 312. a transmission structure; 313. a second pin hole; 314. a fourth pin hole; 32. a butt joint member; 321. a column; 3211. a first pin hole; 322. a top plate; 33. a first pin; 34. a first compression spring; 35. a transmission seat; 351. a third pin hole; 36. a second pin; 37. and a second compression spring.

Detailed Description

Preferred embodiments of the present application are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present application, and are not intended to limit the scope of the present application. For example, although the following embodiments of the present application are described in connection with an electric vehicle, this is not intended to limit the scope of the application, and the application may be applied to other vehicles requiring battery replacement without departing from the principles of the application.

It should be noted that, in the description of the present application, terms such as "upper", "lower", "horizontal", "inner", "outer", and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Furthermore, it should be noted that, in the description of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those skilled in the art according to the specific circumstances.

The lock body assembly of the present application will be described with reference first to fig. 1 to 3.

As shown in fig. 1 to 3, in order to solve the problems of low efficiency and poor reliability of the existing power exchanging method, the lock body assembly 10 of the present application includes: mount 11, connector 12, nut 13 and locking piece 14. The mounting seat 11 is of a cylindrical structure, the bottom of the mounting seat 11 is open, and the top is provided with a mounting hole 111. The connection member 12 has a connection portion 121 and a fastening portion 122 connected to each other, one end of the connection portion 121 is provided with threads and protrudes into the mount 11 from above the mounting hole 111, the other end of the connection portion 121 is connected to the fastening portion 122, and the connection member 12 is provided to be rotatable about its own axis so that the fastening portion 122 can be rotated to a first position for disengaging the fastener to be fastened from the target fastener, and a second position for connecting the fastener to the target fastener. The nut 13 is screwed to one end of the connecting portion 121 extending into the mounting seat 11, the locking piece 14 is sleeved on the connecting portion 121 and located between the nut 13 and the top inner wall of the mounting seat 11, and the locking piece 14 is arranged to be pressed between the nut 13 and the top inner wall of the mounting seat 11 when the nut 13 is screwed.

For example, when the lock assembly 10 is applied to an electric vehicle, the lock assembly 10 is fixed on a battery pack, the battery pack is a to-be-fastened member, the target fastening member may be a vehicle chassis, a locking hole is formed in the chassis, or the target fastening member may be a locking member or a locking assembly 20 disposed on the vehicle chassis. When the battery pack is installed, the battery pack is lifted to the installation position of the vehicle chassis, then the locking and unlocking device 30 is driven to operate, the locking and unlocking device 30 ascends and is in butt joint with the nut 13, locking torque is applied to the nut 13, the nut 13 is enabled to rotate and the connecting piece 12 is driven to rotate until the fastening portion 122 is located at the second position, the nut 13 is screwed, the anti-loose piece 14 is extruded between the nut 13 and the top inner wall of the installation seat 11, and at the moment, the fastening portion 122 of the connecting piece 12 is clamped on the target fastening piece. The battery pack is secured to the vehicle chassis. When the battery pack is detached, the locking and unlocking device 30 is lifted to be in butt joint with the nut 13, then reverse torque is applied, the nut 13 reversely rotates and drives the connecting piece 12 to reversely rotate in the rotation process until the fastening part 122 is positioned at the first position, at the moment, the locking and unlocking device 30 does not continuously drive the nut 13 any more, and the battery pack can be lifted down from the installation position.

The lock body assembly 10 can reduce the power conversion time, improve the power conversion efficiency, avoid the screw thread effect and ensure the connection reliability on the premise of ensuring the effective locking of the battery. Specifically, the detachment and connection between the fastener to be fastened and the target fastener are achieved by adopting the manner that the fastening part 122 rotates to the first position and the second position, so that the detachment and fastening of the battery can be achieved by rotating the fastening part 122 on the basis of achieving the locking and detachment of the battery, the complete detachment of the connecting part 121 and the nut 13 is not required in the locking and unlocking process, and the inventor experiment verifies that the rotation of the fastening part 122 between the first position and the second position can be achieved by only unscrewing the nut 131-2 circles at least, so that the time period of the replacement of the unlocking and locking processes is greatly reduced, and damage and failure caused by frequent detachment of threads can be avoided. By arranging the anti-loosening member 14, the anti-loosening between the connecting member 12 and the nut 13 can be realized after the nut 13 is screwed, and the connecting member 12 is prevented from loosening in the process of vibration and the like, so that the connection reliability of the lock body assembly 10 is improved.

A preferred embodiment of the lock body assembly 10 of the present application is described below with reference to fig. 1-4.

As shown in fig. 1 to 4, in a preferred embodiment, the lock body assembly 10 includes a mounting seat 11, a connecting member 12, a nut 13, a locking member 14, a return spring 15, and a spring seat 16.

Referring to fig. 2 and 3, the mounting seat 11 has a cylindrical structure, the bottom of which is open, the top of which has a certain thickness, and the middle of which is provided with a mounting hole 111. The periphery of the mounting seat 11 is in a round-corner rectangular cylinder shape, and the inside of the mounting seat is a cylindrical cavity. The top of the mounting seat 11 is further provided with a first limiting structure 112, and the first limiting structure 112 is configured to allow the fastening portion 122 of the connecting piece 12 to be embedded therein toward one side of the mounting seat 11. The first limiting structure 112 is preferably a limiting groove, which is integrally formed with the mounting seat 11 and is formed by recessing the top side of the mounting seat 11 downward.

With continued reference to fig. 2 and 3, the connecting member 12 includes a connecting portion 121 and a fastening portion 122, the connecting portion 121 is cylindrical, a lower portion thereof is threaded and extends into the mounting seat 11 through the mounting hole 111 at the top of the mounting seat 11 to be screwed with the nut 13, and an upper portion thereof is positioned outside the mounting seat 11 and is connected with the fastening portion 122. The fastening portion 122 includes at least two rod bodies formed by extending the upper end portion of the connecting portion 121, and an included angle is formed between the axis of the rod body and the axis of the connecting portion 121. Preferably, the fastening portion 122 includes two rod bodies integrally formed with the connection portion 121, extending opposite to each other and forming a T-shaped rod with the connection portion 121. The side of the T-shaped rod away from the mounting seat 11 (upper side shown in fig. 3) is arc-shaped, and the bottom of the connecting portion 121 is embedded with the permanent magnet 17.

Still referring to fig. 2 and 3, the nut 13 is screwed to the connection portion 121 of the connection member 12, and a plum spline is formed at a lower portion of the nut 13 for being engaged with the plum sleeve. The upper portion of the nut 13 is formed to extend outwardly with an annular stepped surface having a diameter substantially equal to (slightly smaller than the diameter of the inner wall of the mount 11) the diameter of the inner wall of the mount 11 when mounted.

The return spring 15 is disposed inside the mounting seat 11, and two ends thereof respectively abut against the nut 13 and the top inner wall of the mounting seat 11. In the application, the return spring 15 is a conical spring, the lock body assembly 10 further comprises a spring seat 16, one end of the return spring 15 is abutted against the annular step surface of the nut 13 through the spring seat 16, the other end of the return spring is abutted against the top inner wall of the mounting seat 11, and the anti-loose piece 14 is positioned in the return spring 15. In this way, when the nut 13 is not tightened, the elastic force of the return spring 15 makes the nut 13 move downward until the lower side surface of the fastening portion 122 is embedded in the limit groove at the top of the mounting seat 11.

Referring to fig. 4, in a preferred embodiment, the locking member 14 includes a first washer 141 and a second washer 142 that are engaged with each other to be used in pairs. The first gasket 141 is annular and sleeved on the connecting portion 121, a first radial ridge 1411 is formed on an upper surface of the first gasket 141, and a first wedge-shaped surface 1412 is formed on a lower surface of the first gasket along a circumferential direction. The second gasket 142 is annular, and is also sleeved on the connecting portion 121 and located below the first gasket 141, a second radial ridge 1421 is formed on the lower surface of the second gasket 142, and a second wedge surface 1422 matched with the first wedge surface 1412 is formed on the upper surface of the second gasket 142 along the circumferential direction. Preferably, the coefficient of friction between the first radial ridge 1411 and the top inner wall of the mount 11 is greater than the coefficient of friction between the first wedge 1412 and the second wedge 1422, and the coefficient of friction between the second radial ridge 1421 and the nut 13 is greater than the coefficient of friction between the first wedge 1412 and the second wedge 1422.

The first radial ridge 1411 and the top inner wall of the mount 11 are pressed against each other, the second radial ridge 1421 and the connecting portion 121 are pressed against each other, and the first wedge surface 1412 and the second wedge surface 1422 are pressed against each other in engagement. Since the coefficient of friction between the first radial ridge 1411 and the top inner wall of the mount 11 and the coefficient of friction between the second radial ridge 1421 and the flange section are both greater than the coefficient of friction between the first wedge 1412 and the second wedge 1422, there is no relative sliding between the upper surface of the first washer 141 and the top inner wall of the mount 11, and no relative sliding between the lower surface of the second washer 142 and the nut 13, which occurs only between the first wedge 1412 and the second wedge 1422. When the nut 13 tends to loosen, there is a wedge effect on the wedge surface between the two washers, which reduces the tendency of the nut 13 to loosen, so that loosening does not occur.

By adopting the T-shaped rod as the connecting piece 12, the setting mode is beneficial to improving the mounting and dismounting precision and reducing the control difficulty. By providing the first limiting structure 112 on the top of the mounting seat 11, the fastening portion 122 can be positioned by embedding the fastening portion 122 therein, so that the positioning accuracy of the fastening portion 122 is improved. By providing the top side of the fastening portion 122 with an arc shape, it is possible to provide a guide when the rod body rises, improving the trafficability of the rod body through the through hole. By providing the return spring 15, recovery of the fastening portion 122 can be achieved by the return spring 15, and rapid seating and positioning of the fastening portion 122 can be achieved. The anti-loosening member 14 is arranged in a manner of selecting the first gasket 141 and the second gasket 142, so that when the connecting member 12 has a loosening trend, the wedge-shaped surfaces of the first gasket 141 and the second gasket 142 relatively rotate to generate lifting tension to prevent the connecting member 12 from loosening, thereby improving the anti-loosening effect.

The locking mechanism of the present application will be described with reference to fig. 1 and 5.

As shown in fig. 1 and 5, the present application further provides a locking mechanism, which includes a locking assembly 20 and the lock body assembly 10, where the lock body assembly 10 is cooperatively connected with the locking assembly 20.

Specifically, the locking assembly 20 includes a bracket 21, a clip 22, and a housing 23. The bracket 21 can be fixedly installed on a sheet metal of a vehicle body of an electric vehicle, the bracket 21 is provided with a through hole 211, the through hole 211 is a rectangular long hole, the fastening part 122 can pass through the through hole 211 when the fastening part 122 is at a first position, and the fastening part 122 cannot pass through the through hole 211 when the fastening part 122 is at a second position. The bracket 21 is further provided with a second limiting structure 212, and the second limiting structure 212 is configured to limit the fastening portion 122 when the fastening portion 122 rotates to the first position and/or the second position. Preferably, the second limiting structure 212 is a limiting bump integrally formed with the bracket 21, and two limiting bumps are provided and are arranged along a diagonal direction of the via hole 211. Further, the limit bump is substantially square and has a first abutting surface and a second abutting surface adjacent to each other, wherein the first abutting surface is flush with a sidewall of the via 211. Referring to fig. 6, when the fastening portion 122 rotates to the first position, both end sides of the fastening portion 122 respectively abut against the first abutment surfaces of the two limit protrusions. Referring to fig. 7, when the fastening portion 122 is rotated to the second position, the other two end sides of the fastening portion 122 abut against the second abutment surface.

With continued reference to fig. 5, the clamping member 22 is detachably mounted on the bracket 21, so that the fastening portion 122 is clamped to the clamping member 22 when rotated to the second position. Preferably, a mounting groove 213 is formed on one side of each limit bump on the bracket 21, and the clamping piece 22 is a metal block, and the metal block is embedded in the mounting groove 213 in an interference manner. Referring to fig. 7, when the fastening part 122 is rotated to the second position and the nut 13 is tightened, the lower side surfaces of the fastening part 122 are engaged with the two engaging pieces 22.

The cover 23 is fixedly connected to the bracket 21 and covers the through hole 211. Specifically, the casing 23 includes a cap portion that allows the fastening portion 122 to rotate inside and a bend formed by the cap portion extending outwards, the bend is fixedly embedded with a nut 13 insert, the bracket 21 is provided with a through hole, and a screw passes through the through hole and is screwed on the nut 13 insert, so that the casing 23 is fixed. In addition, in order to avoid interference, two openings are also formed in the cap part, and after the cap is arranged, the openings are clamped on the limiting protruding blocks.

According to the locking mechanism, the lock body assembly 10 is matched and connected with the locking assembly 20, so that the dismounting time between the lock body assembly 10 and the locking assembly 20 can be reduced, the dismounting efficiency is improved, and the connection reliability between the lock body assembly 10 and the locking assembly 20 can be ensured after the lock body assembly and the locking assembly are connected. By providing the second limiting structure 212, the accuracy of the rotation position of the fastening portion 122 can be improved, and the power conversion accuracy can be improved. Through setting up joint spare 22 for fastening portion 122 all blocks at every turn and puts on joint spare 22, reduces the wearing and tearing to support 21, and the setting up mode that joint spare 22 can dismantle the connection makes the convenience change joint spare 22 after joint spare 22 wearing and tearing to a certain extent. By providing the housing 23, the internal and external environments of the housing 23 can be separated, and foreign matters such as mud and sand in the environment can be prevented from entering the locking assembly 20, so that torque attenuation is caused, and connection stability is improved.

It will be appreciated by those skilled in the art that the foregoing description of the preferred embodiments is provided merely for illustrating the principles of the present application and is not intended to limit the scope of the application, which is susceptible to modification by a person skilled in the art, based on specific requirements, in order to adapt the application to a more specific application scenario without departing from the principles of the present application.

For example, although the above arrangement is described in connection with the connection member 12 being a T-bar, the specific structure of the connection member 12 is not fixed, and the number of bars included in the fastening portion 122 may be three or more. The angle between the axis of the rod body and the axis of the connecting portion 121 may also be an acute angle of less than 90 °.

For another example, although the top side of the rod body is configured to be arc-shaped, this is only a preferred technical solution, and those skilled in the art may also configure the top to be other shapes, as long as the rod body can be smoothly installed.

For another example, in another alternative embodiment, to further increase the bearing area of the rod body, the width of the rod body (i.e., the length in the horizontal direction perpendicular to the axis of the rod body) may be gradually increased in the direction away from the connecting portion 121; and/or one end of the rod body remote from the connection part 121 is formed with a protrusion structure extending outwardly in the width direction thereof (as above). By the arrangement mode, the bearing area of the rod body can be increased, and the connection reliability of the lock body assembly 10 is further improved.

For another example, although the above embodiment has been described with reference to the case where the first stopper structure 112 is provided at the top of the mounting base 11, the provision of the first stopper structure 112 is not necessarily required, and the seating position of the fastening portion 122 can be well restricted when the first stopper structure 112 is provided, so that it is a preferable embodiment. For another example, the limit groove may be a through groove or the like in addition to the groove adapted to the fastening portion 122 as shown in the drawings. Of course, the specific forming manner of the first limiting structure 112 is not limited to the only one, and a person skilled in the art may also form the first limiting structure 112 by screwing, welding or bonding a metal block or a metal plate on the top of the mounting seat 11.

In an alternative embodiment, the placement of the return spring 15 is not necessary, and one skilled in the art can selectively place the return spring 15 based on specific needs. In addition to the conical spring, the person skilled in the art can also choose a cylindrical spring, which of course, when compressed, does not facilitate the locking of the fastener and the nut 13, compared to the conical spring.

In an alternative embodiment, the upper portion of the nut 13 may not be provided with an annular stepped surface, but the return spring 15 may be directly abutted against the top surface of the nut 13. The spring seat 16 is not necessarily provided, and the return spring 15 may be directly abutted against the top surface of the nut 13 when the spring seat 16 is not provided.

In an alternative embodiment, although the above embodiment is described with reference to the return spring 15 abutting against the annular stepped surface of the extension of the nut 13 and the locking member 14 being located inside the return spring 15, this is merely an example, and one skilled in the art can adjust the above arrangement. For example, referring to fig. 8, an annular groove may be formed in the middle of the top side of the nut 13, a conical spring with a smaller outer diameter is selected as the return spring 15, one end of the return spring 15 abuts against the top inner wall of the mounting seat 11, and the other end abuts against the annular groove in the middle of the top side of the nut 13 through the spring seat 16. At this time, the anti-loosening member 14 with a larger middle inner hole is selected, and the anti-loosening member 14 can be sleeved on the outer periphery of the return spring 15.

In an alternative embodiment, the locking element 14 may also be a washer. The gasket may be arranged in two ways, one is that the roughness of the upper surface of the gasket is greater than that of the lower surface, at this time, when the gasket is pressed, since the roughness of the upper surface is greater than that of the lower surface, there is no relative rotation between the top inner wall of the mounting seat 11 and the upper surface of the gasket, and the upper surface of the nut 13 and the lower surface of the gasket can rotate relatively, and the relative rotation causes the wear surface to be transferred between the upper surface of the flange section and the lower surface of the gasket. And secondly, the gasket is fixedly connected to the inner wall of the top of the mounting seat 11, for example, the gasket is screwed on the inner wall of the top through a countersunk head screw, and at the moment, no relative rotation exists between the gasket and the top of the mounting seat 11.

Further, when the washer is selected as the anti-loosening member 14, in order to improve the self-locking effect of the nut 13, the nut 13 may be selected as the anti-loosening nut 13, and the anti-loosening of the nut 13 itself is realized through the anti-loosening nut 13. By combining the washer with the locknut 13, the locking effect can be further improved, and the reliability of the lock body assembly 10 can be improved.

In an alternative embodiment, the particular arrangement of the locking assembly 20 is not exclusive and can be adjusted by one skilled in the art based on the particular application scenario. For example, the locking assembly 20 may be provided without the bracket 21, but the through hole 211 may be directly opened on the vehicle body sheet metal, or the like. Similarly, the locking assembly 20 may not include the second limiting structure 212, the engaging member 22, the housing 23, etc., although it is preferable to provide the above structural components at the same time.

In an alternative embodiment, the second limiting structure 212 is described by way of a limiting bump, but the specific form is not limited to this, and may be ribs, flaps, etc. besides bumps. The second limiting structure 212 may be integrally formed with the bracket 21, and may be fixedly connected to the bracket 21 by a fastener. Furthermore, it is only preferable that the second limiting structure 212 is provided with two, and a person skilled in the art can adjust the number of the second limiting structures 212 in case that limiting of the fastening part 122 can be achieved. Only one of the second limiting structures 212 may be provided.

In an alternative embodiment, the provision of the via 211 as an elongated hole is merely exemplary, and a person skilled in the art may adjust it based on the specific structural form of the fastening portion 122. If the fastening portion 122 includes three rods, the through holes 211 may be correspondingly configured as a tri-fork.

In an alternative embodiment, the clamping element 22 may be screwed or glued to the support 21 in addition to being embedded, without this adjustment of the connection being out of the principle of the application.

In an alternative embodiment, the specific structure of the housing 23 is not exclusive, and the present application can be applied as long as the housing of the via hole 211 is achieved.

The lock and unlock device 30 of the present application will be described with reference to fig. 1 and 9.

As shown in fig. 1 and 9, the present application further provides a locking and unlocking device 30, wherein the locking and unlocking device 30 comprises a driving mechanism and a locking and unlocking sleeve 31, the driving mechanism is in transmission connection with the locking and unlocking sleeve 31, the locking and unlocking sleeve 31 is arranged to be capable of being in matched connection with a nut 13, a butt piece 32 is arranged inside the locking and unlocking sleeve 31, and the butt piece 32 is arranged to be capable of being matched with the bottom of a connecting part 121 in the lock body assembly 10 of any one of the first aspects, so that the connecting part 121 rotates along with the locking and unlocking sleeve 31 when the nut 13 is unscrewed.

In a specific embodiment, the driving mechanism comprises a driving motor and a speed reducer, an output shaft of the driving motor is in transmission connection with an input shaft of the speed reducer, an output shaft of the speed reducer is in transmission connection with the locking and unlocking sleeve 31 through a transmission seat 35, and the driving motor drives the locking and unlocking sleeve 31 to rotate through the output shaft and the speed reducer when being electrified. Specifically, the top of the locking and unlocking sleeve 31 is formed with a sleeve structure 311, the bottom is formed with a transmission structure 312, the butt joint piece 32 is arranged inside the sleeve structure 311, and the locking and unlocking sleeve 31 is connected with the transmission seat 35 through the transmission structure 312. The sleeve structure 311 is a stepped groove, the diameter of the barrel at the barrel opening is larger than that of the barrel bottom, and the barrel opening is a plum blossom tooth structure which can be matched with the spline of the nut 13. The transmission structure 312 is a non-circular hole, which may be a rectangular hole or a square hole in the present application, and correspondingly, the transmission seat 35 has a rectangular or square transmission shaft, and the transmission is inserted into the hole, so as to realize the transmission between the transmission seat 35 and the locking and unlocking sleeve 31.

The butt joint part 32 is a permanent magnet top core in the application, and the permanent magnet top core can magnetically attract the permanent magnet 17 embedded at the bottom of the connecting part 121. The permanent magnet top core comprises a cylinder 321 and a top plate 322, the sleeve structure 311 is communicated with the transmission structure 312 through a through hole, and the aperture of the through hole is approximately equal to that of the cylinder 321 of the permanent magnet top core. The post 321 has a first pin hole 3211 formed along a radial direction thereof, and the locking and unlocking sleeve 31 has a second pin hole 313 formed along a radial direction thereof at a position of the through hole, and the first pin 33 passes through the first pin hole 3211 and the second pin hole 313 to connect the post 321 with the locking and unlocking sleeve 31. Further, the first pin hole 3211 is a long hole, and the locking and unlocking device 30 further includes a first compression spring 34, where two ends of the first compression spring 34 are respectively abutted between the top plate 322 of the permanent magnetic top core and the bottom of the locking and unlocking sleeve 31.

Similarly, the transmission seat 35 is provided with a third pin hole 351, the locking and unlocking sleeve 31 is provided with a fourth pin hole 314, and the second pin shaft 36 passes through the third pin hole 351 and the fourth pin hole 314 to connect the locking and unlocking sleeve 31 with the transmission seat 35. The third pin hole 351 is a long hole, a shaft shoulder is formed on the periphery of the locking and unlocking sleeve 31, and two ends of the second compression spring 37 are respectively abutted against the shaft shoulders of the transmission seat 35 and the locking and unlocking sleeve 31.

In the ascending process of the locking and unlocking sleeve 31, the sleeve structure 311 and the nut 13 are used for cap recognition, in any metallocene process, the deformation of the second compression spring 37 is used for buffering, and after cap recognition is successful, the driving motor drives the locking and unlocking sleeve 31 to rotate, so that the nut 13 is screwed or unscrewed. In the screwing and unscrewing process, the permanent magnet top core and the permanent magnet 17 are magnetically attracted, and the T-shaped rod can be assisted to rotate, so that the T-shaped rod can effectively rotate between the first position and the second position.

According to the locking and unlocking device 30 disclosed by the application, the butt joint piece 32 is arranged, so that the butt joint piece 32 can assist the rotation of the connecting part 121 in the unscrewing process of the nut 13, the follow-up rotation of the connecting part 121 is realized, the rotation failure caused by the fact that the connecting part 121 is driven to rotate only by the nut 13 is prevented, and the stability of the locking and unlocking process is improved. The butt joint part 32 is arranged as a permanent magnet top core, and can drive the connecting part 121 to rotate along with the magnetic force. The first compression spring 34 is arranged between the permanent magnet top core and the locking and unlocking sleeve 31, so that the floating of the permanent magnet top core can be realized, and the connection stability between the permanent magnet top core and the connecting piece 12 can be improved.

Of course, the particular arrangement of the locking and unlocking means 30 is not necessarily constant, and can be adapted by a person skilled in the art, as long as the adaptation does not deviate from the principles of the present application.

For example, in an alternative embodiment, the butting piece 32 is a non-magnetic top core disposed in the locking and unlocking sleeve 31, the top of the top core is formed with a spline structure, at this time, the bottom of the connecting piece 12 does not need to be provided with the permanent magnet 17, and the rotation of the connecting piece 12 is realized through friction force between the spline structure and the connecting piece 12.

As another example, in an alternative embodiment, the specific structure of the permanent magnetic top core is not unique, and those skilled in the art may also configure it to be columnar or the like. In addition, the permanent magnet 17 at the bottom of the connecting member 12 may be replaced by a magnetic metal or the like, or the connecting member 12 may be made of a material containing a magnetic metal.

For another example, the specific arrangement mode of the driving mechanism is not the only one, and the other driving components can be selectively increased or decreased by a person skilled in the art on the premise of at least arranging the driving motor.

In another alternative embodiment, the specific configuration of the locking and unlocking sleeve 31 may be adjusted by those skilled in the art, such as by adapting the sleeve structure 311 after the structural adjustment of the nut 13. For another example, the transmission structure 312 may be provided as a protrusion, instead of a recess, and the corresponding transmission seat 35 may be provided as a protrusion structure.

For another example, in another alternative embodiment, the permanent magnet top core may be fixed in the locking and unlocking sleeve 31 instead of floating by the first compression spring 34. The same is true between the transmission seat 35 and the locking and unlocking sleeve 31, and will not be described again.

The application also provides a battery pack, which comprises a shell, wherein the lock body assembly 10 is arranged on the shell, and the mounting seat 11 of the lock body assembly 10 is fixedly connected to the shell of the battery pack.

According to the battery pack, the lock body assembly 10 is arranged on the shell, so that the replacement time of the battery pack can be reduced, the electricity replacement efficiency is improved, the screw thread type is avoided being small, and the connection reliability of the battery pack is ensured.

The application also provides a vehicle comprising a vehicle body, a battery pack and a locking mechanism of any one of the third aspects, the battery pack being connected to the vehicle body by the locking mechanism.

Finally, the locking process and the unlocking process of the locking mechanism of the present application will be briefly described with reference to fig. 6, 7 and 9.

In the locking process of the locking mechanism, the fastening part 122 is in the first position, the locking and unlocking device 30 is lifted, the locking and unlocking sleeve 31 is in butt joint with the nut 13, and after the butt joint is completed, the connecting piece 12 is driven to lift up together and pass through the through hole 211 on the bracket 21. Subsequently, the locking and unlocking sleeve 31 rotates to drive the nut 13 to rotate, and the permanent magnet top core drives the T-shaped rod to rotate in the rotating process until the T-shaped rod is located at the second position after being abutted against the first abutting surface of the limiting lug. Then, the locking and unlocking sleeve 31 continues to rotate to drive the nut 13 to rotate for 1-2 circles and then is screwed, after the nut 13 is screwed, the first gasket 141 and the second gasket 142 are extruded between the nut 13 and the top inner wall of the mounting seat 11, and the T-shaped rod is clamped on the metal block.

In the locking mechanism unlocking process, the locking and unlocking device 30 ascends, the locking and unlocking sleeve 31 is in butt joint with the nut 13, after the butt joint is finished, the locking and unlocking sleeve 31 applies reverse unlocking moment to the nut 13, the nut 13 is unscrewed for 1-2 circles under the driving of the locking and unlocking sleeve 31, when the nut 13 is unscrewed, a gap exists between the T-shaped rod and the metal block, the T-shaped rod and the permanent magnet top core follow-up in the continuous rotation process of the locking and unlocking sleeve 31, and the T-shaped rod stays at the first position until the T-shaped rod abuts against the second abutting surface of the limiting lug. Subsequently, the locking and unlocking device 30 is lowered, the T-bar and the nut 13 are lowered, the T-bar is withdrawn from the through hole 211, and after the locking and unlocking device 30 is separated from the nut 13, the T-bar is seated in the limit groove by the return spring 15.

Those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims of the present application, any of the claimed embodiments may be used in any combination.

Thus far, the technical solution of the present application has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present application is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present application, and such modifications and substitutions will fall within the scope of the present application.

Claims

1. A lock body assembly, the lock body assembly comprising:

2. The lock assembly according to claim 1, wherein the fastening portion includes at least two rods formed by extending outwardly from ends of the connecting portion, and an included angle is formed between an axis of the rods and an axis of the connecting portion.

3. The lock assembly according to claim 2, wherein said securing portion includes two of said posts extending opposite each other and forming a T-bar with said connecting portion.

4. The lock assembly of claim 2, wherein a side of the lever body remote from the mount is arcuate.

5. The lock assembly according to claim 2, wherein the width of the shank increases gradually in a direction away from the connecting portion; and/or

6. The lock assembly according to claim 1, wherein a top of the mounting base is provided with a first limit structure arranged to allow a side of the fastening portion facing the mounting base to be embedded therein.

7. The lock assembly of claim 6, wherein the first limiting structure is a limiting groove; and/or

The first limiting structure is integrally formed with the mounting seat.

8. The lock body assembly of claim 1, further comprising a return spring disposed within the mount and having opposite ends respectively abutting the nut and a top inner wall of the mount.

9. The lock assembly of claim 8, wherein the return spring is a conical spring; and/or

One end of the return spring is abutted to the nut through a spring seat.

10. The lock body assembly according to claim 8, wherein an annular step surface is outwardly formed on an outer peripheral side of the nut, and one end of the return spring abuts against the annular step surface; or alternatively

11. The lock assembly according to claim 1, wherein the locking member comprises a first gasket and a second gasket, the first gasket is annular and sleeved on the connecting portion, a first radial ridge is formed on the upper surface of the first gasket, a first wedge surface is formed on the lower surface of the first gasket along the circumferential direction, the second gasket is annular and sleeved below the first gasket, a second radial ridge is formed on the lower surface of the second gasket, a second wedge surface matched with the first wedge surface is formed on the upper surface of the second gasket along the circumferential direction, when the nut is screwed down, the first radial ridge and the top inner wall of the mounting seat are pressed against each other, the second radial ridge and the nut are pressed against each other, and the first wedge surface and the second wedge surface are pressed against each other.

12. The lock assembly of claim 1, wherein the anti-loose member is a washer.

13. The lock assembly of claim 12, wherein the upper surface of the gasket has a roughness greater than the roughness of the lower surface thereof; or alternatively

14. The lock assembly of claim 12, wherein the nut is a locknut.

15. A battery pack comprising a housing having the lock assembly of any one of claims 1-14 disposed thereon.

16. A locking mechanism comprising a locking assembly and the lock body assembly of any one of claims 1-14, the lock body assembly being cooperatively associated with the locking assembly.

17. The locking mechanism of claim 16, wherein the locking assembly comprises a bracket having a via opening therein, the via allowing the securing portion to pass therethrough, the securing portion being capable of passing therethrough when the securing portion is in the first position, the securing portion being incapable of passing therethrough when the securing portion is in the second position.

18. The locking mechanism of claim 17, wherein the locking assembly further comprises a second limiting structure disposed on the bracket and configured to limit the securing portion when the securing portion is rotated to the first position and/or the second position.

19. The locking mechanism of claim 18, wherein the second limiting structure is a limiting projection having a first abutment surface against which the securing portion abuts when rotated to the first position and a second abutment surface against which the securing portion abuts when rotated to the second position.

20. The locking mechanism of claim 19, wherein two of the limit bumps are disposed diagonally to the via and the first abutment surface of the limit bump is flush with the sidewall of the via.

21. The locking mechanism of claim 18, wherein the second limiting structure is integrally formed with the bracket or fixedly connected to the bracket by a fastener.

22. The locking mechanism of claim 17, wherein the locking assembly further comprises a catch removably mounted to the bracket such that the securing portion snaps into place upon rotation to the second position.

23. The locking mechanism of claim 22, wherein the bracket has a mounting slot formed therein, the clip being embedded in the mounting slot; and/or

The clamping piece is a metal block.

24. The locking mechanism of claim 17, wherein the locking assembly further comprises a housing fixedly coupled to the bracket and covering the via.

25. A locking and unlocking device, characterized in that it comprises a driving mechanism and a locking and unlocking sleeve, the driving mechanism is in transmission connection with the locking and unlocking sleeve, the locking and unlocking sleeve is arranged to be capable of being in cooperation connection with a nut, a butt joint piece is arranged inside the locking and unlocking sleeve, and the butt joint piece is arranged to be capable of being matched with the bottom of the connecting part in the lock body assembly according to any one of claims 1-14, so that the connecting part follows the rotation of the locking and unlocking sleeve when the nut is unscrewed.

26. The locking and unlocking apparatus according to claim 25, wherein the docking piece is a permanent magnet top core disposed within the locking and unlocking sleeve; or alternatively

27. The locking and unlocking device according to claim 26, wherein the permanent magnet top core comprises a cylinder and a top plate, a first pin hole is formed in the cylinder, a second pin hole is formed in the locking and unlocking sleeve, and the cylinder is connected with the locking and unlocking sleeve through a first pin shaft.

28. The locking and unlocking device according to claim 27, wherein the first pin hole is a long hole, the first pin shaft can move along the length direction of the long hole, and the locking and unlocking device further comprises a first compression spring, and two ends of the first compression spring are respectively abutted between the top plate and the locking and unlocking sleeve.

29. A vehicle comprising a vehicle body, a battery pack, and the locking mechanism of any one of claims 16 to 24, the battery pack being connected to the vehicle body by the locking mechanism.