CN117301939A

CN117301939A - Lock body assembly, locking and unlocking device, battery pack, locking mechanism and vehicle

Info

Publication number: CN117301939A
Application number: CN202210699391.5A
Authority: CN
Inventors: 蒋舒; 张宁; 杨潮
Original assignee: Weilai Automobile Technology Anhui Co Ltd
Current assignee: Weilai Automobile Technology Anhui Co Ltd
Priority date: 2022-06-20
Filing date: 2022-06-20
Publication date: 2023-12-29

Abstract

The invention relates to the technical field of electric automobiles, in particular to a lock body assembly, a locking and unlocking device, a battery pack, a locking mechanism and a vehicle. The application aims to solve the problem that the durability and reliability of the existing locking mechanism are poor. To this end, the lock body assembly of the present application includes: the mounting seat is in a cylindrical structure, a mounting hole is formed in the top of the mounting seat, the bottom of the mounting seat is open, and the locking and unlocking head is allowed to enter; a connecting piece, which is provided with an operation part and a fastening part which are connected with each other, wherein the lower part of the operation part can be in butt joint with the locking and unlocking head, and the upper part of the fastening part can pass through the mounting hole and be rotationally fastened on the target fastener; and the anti-loose piece is arranged between the operation part and the top inner wall of the mounting seat, is arranged to be extruded between the operation part and the top inner wall of the mounting seat when the fastening part and the target fastener are fastened in a rotating way, and does not rotate relative to the top inner wall of the mounting seat. The durability and the connection reliability of the lock body assembly can be improved, the service life of the lock body assembly is prolonged, and the complexity of the mechanism is reduced.

Description

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

Technical Field

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

Background

The power conversion is one of the important energy supplementing modes of the current electric automobile, and the power conversion time can be controlled within 3 minutes generally and is close to the refueling time of the traditional fuel oil automobile, so that the electric automobile is more and more favored by users. In the power conversion scheme, a locking mechanism for connecting a vehicle body and a battery pack is an important ring for realizing 'vehicle-electricity separation', and the durability and connection reliability of the locking mechanism directly determine the power conversion experience of a user, and whether the power conversion scheme can be widely applied.

The locking mechanism that is used for connecting automobile body and battery package at present is including setting up the lock body subassembly on the battery package and setting up the locking subassembly on the automobile body, and the two adopts threaded connection more, through exerting certain pretightning force to threaded connection spare, realizes the combination between threaded connection spare and the corresponding screw thread fastener. However, in practical application, the lock assembly is generally fixedly arranged on the battery pack and flows along with the battery pack, and the locking assembly is fixedly arranged on the vehicle body and flows along with the vehicle body, so that the lock assembly on the battery pack needs to be in butt joint and match with the locking assembly again when the battery pack is changed every time, the abrasion of the lock assembly and the locking assembly is accelerated, and the connection reliability is affected. In addition, as for the locking mechanism, the degree of wear between the flange surface of the threaded connecting piece and the pressure-bearing surface of the connected piece is gradually increased along with the increase of the use times, so that the friction coefficient between the flange surface of the threaded connecting piece and the pressure-bearing surface of the connected piece is changed, and the service lives of the threaded connecting piece and the connected piece are seriously influenced. In view of the above problems, it is an option in the prior art to add an additional anti-loosening mechanism to the lock body assembly, by which the connection reliability of the threaded connection is maintained, but it is apparent that this solution inevitably increases the structural complexity and manufacturing cost of the locking mechanism.

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

Disclosure of Invention

To solve at least one of the above-mentioned problems in the prior art, that is, to solve the problem of poor durability and reliability of the existing locking mechanism, the present application provides a lock body assembly comprising:

the mounting seat is of a cylindrical structure, and the top of the mounting seat is provided with a mounting hole, the bottom of the mounting seat is open and the locking and unlocking head is allowed to enter;

a connecting member having an operation portion and a fastening portion connected to each other, a lower portion of the operation portion being capable of interfacing with the locking/unlocking head, an upper portion of the fastening portion being capable of passing through the mounting hole and being fastened to a target fastener in a rotating manner;

the anti-loosening piece is arranged between the operation part and the top inner wall of the mounting seat, is arranged to be extruded between the operation part and the top inner wall of the mounting seat when the fastening part is rotationally fastened with the target fastening piece, and does not rotate relative to the top inner wall of the mounting seat.

In the preferred technical solution of the lock body assembly, the locking piece includes:

the first gasket is annular and sleeved at the lower part of the fastening part, a first radial convex line is formed on the upper surface of the first gasket, and a first wedge-shaped surface is formed on the lower surface of the first gasket along the circumferential direction;

A second gasket which is used in pairs with the first gasket, 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 fastening portion and the target fastener are rotationally fastened, the first radial ridge and the top inner wall of the mounting seat are pressed against each other, the second radial ridge and the operating portion are pressed against each other, and the first wedge surface and the second wedge surface are pressed against each other.

In a preferred embodiment of the above lock body assembly, a coefficient of friction between the first radial ridge and the top inner wall of the mount is 2.0 to 2.5 times a coefficient of friction between the first wedge-shaped surface and the second wedge-shaped surface; and/or

The friction coefficient between the second radial ridge and the operating portion is 2.0 to 2.5 times that between the first wedge-shaped surface and the second wedge-shaped surface.

In a preferred embodiment of the above lock body assembly, the fastening portion has a threaded section at an upper portion thereof, and the threaded section is capable of passing through the mounting hole and being screwed to the target fastener.

In a preferred embodiment of the above lock assembly, the first wedge surface and the second wedge surface each have a slope greater than a thread angle of the thread segment.

In the preferred technical scheme of the lock body assembly, the lower part of the fastening part is an optical axis section, the upper end of the optical axis section is connected with the threaded section, the lower end of the optical axis section is connected with the operating part, and the first gasket and the second gasket are sleeved on the optical axis section.

In the preferable technical scheme of the lock body assembly, the outer diameter of the optical axis section is smaller than the thread outer diameter of the thread section, and the annular inner diameters of the first gasket and the second gasket are smaller than the thread outer diameter of the thread section.

In the preferred technical scheme of the lock body assembly, the anti-loose member is a gasket, the gasket is sleeved at the lower part of the fastening part, and the roughness of the upper surface of the gasket is larger than that of the lower surface of the gasket.

In the preferable technical scheme of the lock body assembly, the friction coefficient between the upper surface of the gasket and the top inner wall of the mounting seat is 2.0-2.5 times of the friction coefficient between the lower surface of the gasket and the operation part.

In the preferred technical scheme of the lock body assembly, the lower part of the fastening part is an optical axis section, the upper end of the optical axis section is connected with the threaded section, the lower end of the optical axis section is connected with the operating part, and the gasket is sleeved on the optical axis section.

In the preferable technical scheme of the lock body assembly, the outer diameter of the optical axis section is smaller than the thread outer diameter of the thread section, and the inner diameter of the gasket is smaller than the thread outer diameter of the thread section.

In a preferred embodiment of the lock body assembly, the thread segments are coarse threads.

In the preferred technical scheme of the lock body assembly, the surface hardness of the anti-loose piece is larger than that of the connecting piece.

In the preferable technical scheme of the lock body assembly, the surface hardness of the anti-loose piece is 460-510 HV.

In the above preferred technical solution of the lock body assembly, the operation portion includes a flange section and a nut section, the upper surface of the flange section is connected with the fastening portion, the lower surface of the flange section is connected with the nut section, and an axial projection area of the flange section is larger than an axial projection area of the nut section.

In a preferred embodiment of the above lock assembly, the outer diameter of the flange section is substantially equal to the inner diameter of the mounting seat.

In a preferred embodiment of the lock body assembly, the operating portion is configured to be at least partially magnetically attracted to the magnetic member.

The application also provides a locking and unlocking device, the locking and unlocking device includes actuating mechanism and locking and unlocking head, actuating mechanism with it is connected to add the transmission of unlocking head, it is provided with the magnetic part to add on the unlocking head, the magnetic part is set up into can with the above-mentioned preferred technical scheme in the lock body subassembly the lower part magnetism actuation of operation portion.

In the above preferred technical scheme of the locking and unlocking device, a sleeve structure is formed at the top of the locking and unlocking head, a transmission structure is formed at the bottom of the locking and unlocking head, and the magnetic piece is arranged in the sleeve structure.

In the above preferred technical scheme of the locking and unlocking device, the magnetic member is a permanent magnetic top core, the permanent magnetic 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 head, and the cylinder is connected with the locking and unlocking head through a pin shaft.

In the above preferred technical solution of the locking and unlocking device, the second pin hole is a long hole, the pin shaft can move along the hole length direction of the long hole, the permanent magnet top core is set such that the upper surface of the top plate is higher than the top surface of the sleeve structure when the pin shaft moves to the top of the long hole, and the upper surface of the top plate is flush with the inner tooth bottom of the sleeve structure when the pin shaft moves to the bottom of the long hole.

The application also provides a battery pack, which comprises a shell, wherein the shell is provided with the lock body assembly according to any one of the above preferred technical schemes.

The application also provides a locking mechanism, which comprises a locking assembly and the lock body assembly in any one of the above preferred technical schemes, wherein the lock body assembly is matched and connected with the locking assembly.

In the preferable technical scheme of the locking mechanism, the locking assembly comprises a fixed plate, a floating plate and a locking piece, wherein the fixed plate is fixedly connected to the vehicle, the floating plate is floatably arranged on the fixed plate, and the locking piece is fixedly arranged on the floating plate.

The application also provides a vehicle, the vehicle includes automobile body, battery package and above-mentioned preferred technical scheme's locking mechanism, the battery package pass through locking mechanism with automobile body coupling.

According to the preferred technical scheme, the anti-loosening piece is arranged between the operation part and the top inner wall of the mounting seat, so that the durability and the connection reliability of the lock body assembly can be improved, the service life of the lock body assembly is prolonged, and the complexity of a mechanism is reduced. Specifically, current locking mechanism is in the locking in-process, the top inner wall of mount pad is as the pressure-bearing surface and directly produces the friction with the connecting piece, can lead to the top inner wall degree of wear of connecting piece and mount pad to increase over time, and because lock body subassembly is direct fixed connection generally on the battery package and is circulated along with the battery package, locking assembly sets up on the automobile body and flows along with the car, still make the lock body subassembly on the battery package all need with locking assembly running-in again match when changing the electricity at every turn, can accelerate the wearing and tearing between the two, and also inconvenient change after the mount pad wears to a certain extent in addition. And this application is through setting up the locking piece between the top inner wall of operating part and mount pad, can shift the wearing surface by between connecting piece and the mount pad top inner wall between locking piece and the connecting piece to the wearing and tearing degree of the mount pad top inner wall of significantly reduced plays the effect of protection mount pad. Moreover, compared with the fixed arrangement of the mounting seat, the connecting piece and the locking piece are more convenient to replace, and the maintenance cost of the lock body assembly can be reduced. More importantly, in the application, the bottom of the mounting seat is of an open structure, so that the connecting piece can be withdrawn from the mounting seat and does not circulate along with the mounting seat in the process of replacing the battery pack. Therefore, when a new battery pack is installed, the detached connecting piece and the target fastening piece can be still used for rotary fastening, one-to-one matching of the connecting piece and the target fastening piece is realized, and the wearing aggravation or part damage caused by the re-running matching of the connecting piece and the target fastening piece is avoided. In other words, the connecting piece can be in vehicle-to-vehicle circulation with the target fastening piece, and locking consistency of the locking mechanism is guaranteed.

On the other hand, although the connection reliability between the connecting piece and the mounting seat can be improved by adding the anti-loosening mechanism in the prior art, after the abrasion degree of the connecting piece and the mounting seat is deepened gradually, the pretightening force of the connecting piece is still seriously influenced, and the consistency of locking and unlocking torques among a plurality of connecting pieces is poor. And this application is through increasing locking piece, not only can guarantee that the pretightning force attenuation of connecting piece under locking state is in certain limit, more importantly can omit locking mechanism's setting to simplify the structure of lock body subassembly by a wide margin, be favorable to realizing locking mechanism's miniaturization, lightweight demand, reduce locking mechanism's manufacturing cost, increase product competitiveness. Through repeated experiments, observation, analysis and comparison by the inventor, on the premise of the setting mode, the contact surface between the anti-loose piece and the connecting piece is stable in state and normal in abrasion, the pretightening force attenuation of the lock body assembly in the locking state can be controlled within 25% in the design life cycle of the lock body assembly, the design and use requirements are completely met, and the reliable connection between the battery pack and the vehicle body is ensured.

Further, 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.

Further, the slope of the first wedge-shaped surface and the slope of the second wedge-shaped surface are larger than the setting mode of the thread rise angle of the thread section, so that when the thread section is loosened, the lifting amount of the two gaskets in the axial direction is larger than the climbing amount of the thread section in the axial direction, a stroke difference is formed between the two gaskets, the stroke difference is fed back to the inside of the connecting piece, namely the axial pretightening force of the connecting piece is increased, and through the wedge-shaped effect, the loosening trend of the connecting piece is reduced, so that loosening cannot occur.

Further, be less than the screw thread external diameter of screw thread section through the screw thread external diameter of screw thread section in the annular of first gasket and second gasket, and the external diameter of optical axis section is less than the screw thread external diameter's of screw thread section setting mode for first gasket and second gasket can remain on the optical axis section all the time, easy dismounting, still can eliminate locking piece neglected loading, wrong dress, or the risk that drops, and connecting piece and locking piece can be as sub-assembly and easy damaged spare storehouse, realize sub-assembly and target fastener and circulate along with the car together, guarantee locking consistency of locking mechanism.

Further, when the anti-loosening piece is a gasket, the roughness of the upper surface of the gasket is greater than that of the lower surface of the gasket, so that the gasket and the top inner wall of the mounting seat do not rotate relatively, and the connecting piece and the gasket can rotate relatively, so that the wearing surface is transferred between the gasket and the connecting piece, the wearing of the mounting seat is reduced, and the maintenance convenience is improved.

Further, through locating the optical axis section with the packing ring cover, and set up the external diameter of optical axis section and be less than the screw thread external diameter of screw thread section, the internal diameter of packing ring is less than the screw thread external diameter of screw thread section for the packing ring can remain on the optical axis section all the time, easy dismounting can also eliminate locking piece neglected loading, wrong dress, or the risk that drops, and connecting piece and packing ring can be equipped with the storehouse as sub-assembly and wearing part, realizes sub-assembly and target fastener and flows along with the car, guarantees locking uniformity of locking mechanism.

Further, through with packing ring fixed connection on the top inner wall of mount pad, can avoid producing the friction between packing ring and the top inner wall of mount pad, protect the mount pad to avoid wearing and tearing, improve the life of mount pad.

Furthermore, the thread section adopts the coarse thread, so that the connection durability is higher than that of the fine thread, and the service life of the connecting piece can be prolonged.

Further, the surface hardness of the anti-loose piece is set to be larger than that of the connecting piece, so that the contact surface state of the connecting piece and the gasket is more stable, and the wear is normal.

Further, the axial projection area of the flange section is set to be larger than that of the nut section, so that a larger contact area is formed between the connecting piece and the anti-loosening piece, and the anti-loosening effect can be improved.

Further, by arranging the outer diameter of the flange section to be approximately equal to the inner diameter of the mounting seat, the sliding stability and the connection precision of the connecting piece can be ensured, and the seizure, sliding wire and the like caused by axial deflection of the connecting piece are avoided.

According to the locking and unlocking device, the magnetic piece is arranged on the locking and unlocking head, the connecting piece is adsorbed on the locking and unlocking head by utilizing the magnetic attraction effect in the locking and unlocking process, the locking and unlocking stability and the replacement convenience of the battery pack are improved, and the locking and unlocking process is ensured to be carried out smoothly.

Further, through at locking unblock head top formation sleeve structure, with the setting of magnetic part in sleeve structure's inside, can utilize sleeve structure and magnetic part to carry out dual location to the connecting piece, guarantee the dismouting precision of connecting piece, avoid the connecting piece to drop.

Further, by arranging the top plate on the permanent magnet top core, the magnetic attraction force can be increased, and the magnetic attraction effect of the locking and unlocking head and the connecting piece is ensured.

Further, the second pin hole is arranged to be a strip hole, so that the permanent magnet top core and the connecting piece can be magnetically attracted and positioned by utilizing the movement of the pin shaft, and the cap recognition precision of the locking head can be ensured. Through setting up the round pin axle and remove to rectangular hole bottom time roof upper surface and sleeve structure internal tooth bottom parallel and level, can guarantee the positioning stability of connecting piece for the connecting piece keeps stably under the dual location of sleeve internal tooth bottom and permanent magnetism top core, is difficult for the skew or drops.

The battery pack has the advantages that the lock body assembly with the anti-loose piece is arranged on the shell, so that the connection reliability of the battery pack can be guaranteed, the maintenance convenience of the battery pack is improved, the manufacturing cost of the battery pack is reduced, the connection piece and the target fastener are enabled to flow along with the vehicle, and the locking consistency of the locking mechanism is guaranteed.

The locking mechanism of this application through set up the locking piece in the lock body subassembly, can improve locking reliability and the durability of using of locking mechanism, prolongs the life of locking mechanism, reduces the mechanism complexity to the connecting piece can be with the circulation of target fastener together on-vehicle, guarantees the locking uniformity of locking mechanism.

Further, the locking difficulty of the locking mechanism can be reduced by arranging the locking assembly to be that the floating plate floats relative to the fixed plate, and the locking assembly is convenient to replace and low in maintenance cost.

The vehicle of this application adopts above-mentioned locking mechanism and the automobile body connection with locking piece through the battery package of vehicle, can improve the connection reliability between battery package and the vehicle, reduces the security risk of vehicle for the maintenance of vehicle is more convenient. And the connecting piece can flow with the vehicle together with the locking assembly, so that the locking consistency of the locking mechanism is ensured.

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 locking member comprises:

The lock body assembly of claim 2, wherein a coefficient of friction between the first radial ridge and the top inner wall of the mount is 2.0 to 2.5 times a coefficient of friction between the first wedge surface and the second wedge surface; and/or

The lock body assembly according to claim 2, wherein the upper portion of the fastening portion is a threaded section that is capable of passing through the mounting hole and being screwed to the target fastener.

The lock body assembly of claim 4, wherein the first wedge surface and the second wedge surface each have a slope greater than the thread angle of the thread segments.

The lock body assembly according to the scheme 6 is characterized in that the lower portion of the fastening portion is an optical axis section, the upper end of the optical axis section is connected with the threaded section, the lower end of the optical axis section is connected with the operating portion, and the first gasket and the second gasket are sleeved on the optical axis section.

The lock body assembly of claim 6, wherein the outer diameter of the optical axis segment is less than the outer diameter of the thread segment, and the annular inner diameters of the first and second shims are both less than the outer diameter of the thread segment.

The lock body assembly according to claim 1, wherein the locking member is a washer, the washer is sleeved on the lower portion of the fastening portion, and the roughness of the upper surface of the washer is greater than the roughness of the lower surface of the washer.

The lock body assembly according to claim 8, wherein a coefficient of friction between the upper surface of the washer and the top inner wall of the mount is 2.0 to 2.5 times a coefficient of friction between the lower surface of the washer and the operating portion.

The lock body assembly of claim 8, wherein the upper portion of the fastening portion is a threaded section that is capable of passing through the mounting hole and being threaded to the target fastener.

The lock body assembly according to claim 10, wherein the lower portion of the fastening portion is an optical axis section, the upper end of the optical axis section is connected with the threaded section, the lower end of the optical axis section is connected with the operating portion, and the gasket is sleeved on the optical axis section.

The lock assembly of claim 11, wherein the outer diameter of the optical axis segment is less than the outer diameter of the thread segment and the inner diameter of the washer is less than the outer diameter of the thread segment.

The lock assembly according to claim 1, wherein the locking member is a washer fixedly connected to the top inner wall of the mounting base.

The lock body assembly according to scheme 14 is characterized in that a countersunk hole is formed in the gasket, a threaded hole is formed in the inner wall of the top of the mounting seat, and countersunk screws penetrate through the countersunk hole and are then screwed into the threaded hole, so that the gasket is fixedly connected to the inner wall of the top of the mounting seat.

The lock body assembly of claim 13, wherein the upper portion of the fastening portion is a threaded section that is capable of passing through the mounting hole and being threaded to the target fastener.

The lock body assembly of claim 4, 10 or 15, wherein the thread segments are coarse threads.

The lock body assembly according to claim 1, wherein the surface hardness of the locking member is greater than the surface hardness of the connecting member.

The lock assembly as set forth in claim 17, wherein the surface hardness of the locking member is 460-510 HV.

The lock body assembly according to claim 1, wherein the operating portion includes a flange section and a nut section, an upper surface of the flange section is connected to the fastening portion, a lower surface of the flange section is connected to the nut section, and an axial projection area of the flange section is larger than an axial projection area of the nut section.

The lock assembly of claim 19, wherein the outer diameter of the flange section is approximately equal to the inner diameter of the mount.

The lock body assembly according to any one of claims 1 to 20, wherein the operating portion is arranged to be at least partially magnetically attracted to the magnetic member.

Scheme 22. A locking and unlocking device, its characterized in that, locking and unlocking device includes actuating mechanism and locking and unlocking head, actuating mechanism with it is connected to add the unlocking head transmission, it is provided with the magnetic part to add on the unlocking head, the magnetic part is set up to can with the magnetic attraction of operating part in the lock body subassembly of scheme 21.

The locking and unlocking device according to claim 22, wherein a sleeve structure is formed at the top of the locking and unlocking head, a transmission structure is formed at the bottom of the locking and unlocking head, and the magnetic piece is arranged in the sleeve structure.

The device according to claim 23, wherein the magnetic member is a permanent magnetic top core, the permanent magnetic top core comprises a column body and a top plate, a first pin hole is formed in the column body, a second pin hole is formed in the locking and unlocking head, and the column body is connected with the locking and unlocking head through a pin shaft.

The locking and unlocking device according to claim 24, wherein the second pin hole is a long hole, the pin shaft can move along the long hole direction of the long hole, the permanent magnet top core is arranged such that the upper surface of the top plate is higher than the top surface of the sleeve structure when the pin shaft moves to the top of the long hole, and the upper surface of the top plate is flush with the bottom of the internal teeth of the sleeve structure when the pin shaft moves to the bottom of the long hole.

A battery pack according to any one of claims 1-21, wherein the battery pack comprises a housing having the lock assembly of any one of claims 1-21 disposed thereon.

A locking mechanism comprising a locking assembly and a lock body assembly according to any one of claims 1-21, the lock body assembly being cooperatively associated with the locking assembly.

The locking mechanism of claim 27, wherein the locking assembly comprises a fixed plate fixedly connectable to the vehicle, a floating plate floatably disposed in the fixed plate, and a locking member fixedly disposed in the floating plate.

A vehicle comprising a body, a battery pack, and the locking mechanism of claim 27 or 28, the battery pack being connected to the body by the locking mechanism.

Drawings

The lock body assembly, the battery pack, the locking mechanism, the locking and unlocking device and the vehicle of the present application are described below with reference to the accompanying drawings. In the accompanying drawings:

FIG. 1 is an exploded view of a locking mechanism and a locking and unlocking device of the present application;

FIG. 2 is an assembly view of a connector and a locking element of the lock body assembly of the present application;

FIG. 3 is an exploded view of the anti-lock element of the lock body assembly of the present application;

FIG. 4 is a partial cross-sectional view of the connector of the present application in a locked state;

FIG. 5 is a graph of the variation of the preload of the connector of the present application;

FIG. 6 is a cross-sectional view of the locking mechanism of the present application in a locked state;

FIG. 7 is a cross-sectional view of the locking mechanism of the present application in a locked state;

FIG. 8 is an assembly view of a connector and a locking element according to an alternative embodiment of the present application;

fig. 9 is a cross-sectional view of a mount and a locking element according to another alternative embodiment of the present application.

List of reference numerals

10. A lock body assembly; 11. a mounting base; 111. a mounting hole; 13. a connecting piece; 131. an operation unit; 1311. a flange section; 1312. a nut section; 132. a fastening part; 1321. a threaded section; 1322. an optical axis section; 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. countersunk head screws;

20. a locking assembly; 21. a fixing plate; 22. a floating plate; 23. a locking member;

30. a cross beam;

40. adding and unlocking the lock head; 41. a sleeve structure; 42. a transmission structure; 43. a magnetic member; 431. a column; 432. a top plate; 44. a second pin hole; 45. and a pin shaft.

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, while 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 present application, and the lock body assembly, battery pack, and locking mechanism of the present application may be applied to other vehicles without departing from the principles of the present application.

It should be noted that, in the description of the present application, terms such as "medium," "upper," "lower," "vertical," "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 element must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," 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 terms in this application will be understood by those skilled in the art as the case may be.

With reference first to fig. 1 and 2, a lock body assembly of the present application will be described.

As shown in fig. 1 and 2, in order to solve the problem of poor durability and reliability of the existing locking mechanism, the lock body assembly 10 of the present application includes a mounting seat 11, a connecting member 13, and a locking member 14. The mounting seat 11 has a cylindrical structure, and has a mounting hole 111 formed in the top thereof and an opening at the bottom thereof to allow the locking/unlocking head 40 to enter. The connector 13 can enter the mount 11 and the connector has an operation portion 131 and a fastening portion 132 connected to each other, a lower portion of the operation portion 131 can be abutted with the locking and unlocking head 40, and an upper portion of the fastening portion 132 can pass through the mounting hole 111 and be fastened to the target fastener in a rotating manner. The locking piece 14 is provided between the operation portion 131 and the top inner wall of the mount 11, and the locking piece 14 is provided so as to be pressed between the operation portion 131 and the top inner wall of the mount 11 without relative rotation with the top inner wall of the mount 11 when the fastening portion 132 is rotationally fastened with the target fastener.

For example, when the lock body assembly 10 is applied to a vehicle, the mounting base 11 of the lock body assembly 10 is fixed on the battery pack, the target fastener may be a chassis of the vehicle, a locking hole is formed in the chassis, or the target fastener may be a locking member or a locking assembly 20 provided on the chassis of the vehicle, and the fastening portion 132 of the connecting member 13 passes through the mounting hole 111 and is fastened with the target fastener in a rotating manner. When the battery pack with the insufficient power is disassembled, the locking and unlocking device is driven to operate, and the locking and unlocking head 40 of the locking and unlocking device ascends and enters the mounting seat 11 to be in butt joint with the operation part 131 of the connecting piece 13. After the mating, the unlocking lock 40 applies and unlocks torque and descends smoothly, and the connector 13 is thereby rotated out of the target fastener. In the process of withdrawing, the inner wall of the top of the mounting seat 11 and the anti-loose piece 14 do not rotate relatively, so that abrasion is not generated between the inner wall and the anti-loose piece. After being completely withdrawn, the connector 13 is withdrawn from the mounting seat 11 and falls onto the unlocking head 40.

When the full-charge battery pack is installed, the full-charge battery pack is lifted to the installation position of the vehicle chassis, then the locking and unlocking device is driven to operate, the locking and unlocking head 40 drives the connecting piece 13 positioned on the locking and unlocking device to ascend together, the connecting piece enters the installation seat 11 on the full-charge battery pack firstly, the upper part of the fastening part 132 of the connecting piece 13 stretches out through the top installation hole 111 of the installation seat 11 to be in butt joint with a target fastener, after the butt joint is completed, the locking and unlocking head 40 applies torque opposite to the moment of unlocking to the connecting piece 13 and continuously ascends upwards, and the connecting piece 13 is fastened on the target fastener in a rotating mode. After the installation, the unlocking head 40 is withdrawn from the installation seat 11, and the locking piece 14 is pressed between the operation part 131 and the top inner wall of the installation seat 11. When the connecting member 13 is subjected to vibration or the like to have a loosening tendency, the looseness preventing member 14 can prevent the tendency, so that the connecting member 13 is always stably connected.

When the wear between the connection member 13 and the locking member 14 reaches a certain level, the connection member 13 and the locking member 14 can be removed and replaced.

It can be seen that by providing the locking member 14 between the operating portion 131 and the top inner wall of the mounting seat 11, the durability and connection reliability of the lock assembly 10 can be improved, the service life of the lock assembly 10 can be prolonged, and the complexity of the mechanism can be reduced. Specifically, in the locking process of the existing locking mechanism, the top inner wall of the mounting seat 11 is used as a bearing surface to directly rub against the connecting piece 13, so that the abrasion degree of the connecting piece 13 and the top inner wall of the mounting seat 11 can be increased over time, and as the lock body assembly 10 is usually directly and fixedly connected to the battery pack to flow along with the battery pack, the locking assembly 20 is arranged on the vehicle body to flow along with the battery pack, so that the lock body assembly 10 on the battery pack needs to be matched with the locking assembly 20 in a re-running mode during each power change, the abrasion between the two can be accelerated, and the battery pack is inconvenient to replace once the mounting seat 11 is abraded to a certain degree. By arranging the anti-loose piece 14 between the operation part 131 and the top inner wall of the installation seat 11, the abrasion surface can be transferred between the anti-loose piece 14 and the connection piece 13 from the connection piece 13 to the top inner wall of the installation seat 11, so that the abrasion degree of the top inner wall of the installation seat 11 is greatly reduced, and the installation seat 11 is protected. Moreover, the connection member 13 and the locking member 14 are more convenient to replace than the fixed arrangement of the mounting seat 11, and the maintenance cost of the lock body assembly 10 can be reduced. More importantly, in the present application, the bottom of the mounting seat 11 is in an open structure, so that the connecting piece 13 can be withdrawn from the mounting seat 11 and does not flow along with the mounting seat 11 during the process of replacing the battery pack. In this way, when a new battery pack is installed, the detached connecting piece 13 can still be used for rotationally fastening with the target fastening piece, so that one-to-one matching of the connecting piece 13 and the target fastening piece is realized, and wearing aggravation or part damage caused by re-running matching of the connecting piece 13 and the target fastening piece is avoided. In other words, the connector 13 in the present application can be turned on-board together with the target fastener, ensuring the locking consistency of the locking mechanism.

On the other hand, although the connection reliability between the two can be improved by adding the anti-loosening mechanism in the prior art, after the abrasion degree of the connecting piece 13 and the mounting seat 11 is gradually deepened, the pretightening force of the connecting piece 13 is still seriously affected, so that the consistency of locking and unlocking torques among the plurality of connecting pieces 13 is poor. And this application is through increasing locking piece 14, not only can guarantee that the pretightning force attenuation of connecting piece 13 under the locking state is in a certain limit, more importantly can omit locking mechanism's setting to simplify the structure of lock body subassembly 10 by a wide margin, be favorable to realizing locking mechanism's miniaturization, lightweight demand, reduce locking mechanism's manufacturing cost, increase product competitiveness.

A preferred embodiment of the lock body assembly of the present application will now be described with reference to fig. 1-7.

Referring to fig. 1 and 6, in a preferred embodiment, the lock body assembly 10 includes a mounting block 11, a connector 13, and a locking member 14. The mounting seat 11 is in a cylindrical structure, the bottom of the mounting seat is open, the top of the mounting seat is provided with a certain thickness, and the middle of the top of the mounting seat is provided with a mounting hole 111.

Referring to fig. 2, the connection member 13 is a high-strength bolt integrally formed with an operating portion 131 and a fastening portion 132 connected to each other. Specifically, the connecting member 13 is integrally made of a material containing magnetic metal (such as iron, cobalt, nickel, etc.), the upper portion of the fastening portion 132 is a threaded section 1321, the lower portion is an optical axis section 1322, the operating portion 131 includes a flange section 1311 and a nut section 1312, the top end of the threaded section 1321 is provided with a chamfer, the bottom end is connected with the upper end of the optical axis section 1322, the lower end of the optical axis section 1322 is connected with the upper surface of the flange section 1311, the lower surface of the flange section 1311 is connected with the nut section 1312, and the nut section 1312 can magnetically attract each other with the magnetic member. Wherein, the thread section 1321 is a coarse thread, the thread section 1321 can pass through the mounting hole 111 and be screwed to the target fastener, and the outer diameter of the optical axis section 1322 is smaller than the thread outer diameter of the thread section 1321. The outer diameter of the flange section 1311 is approximately equal to the inner diameter of the mounting seat 11, the nut section 1312 is a standard outer hexagonal nut, and the axial projection area of the flange section 1311 is larger than the axial projection area of the nut section 1312. The outer diameter of the flange section 1311 and the inner diameter of the mount 11 may be approximately equal to each other, and the outer diameter of the flange section 1311 and the inner diameter of the mount 11 may be equal to each other in size at the time of design, but the upper deviation of the outer diameter of the flange section 1311 is a negative value and/or the lower deviation of the inner diameter of the mount 11 is a positive value. Or both may be approximately equal, with the flange segment 1311 having an outer diameter slightly smaller than the inner diameter of the mounting 11 (e.g., 1-3mm difference) so that there is a slight gap therebetween.

Referring to fig. 3 and 4, the locking member 14 includes a first washer 141 and a second washer 142, which are engaged with each other to be used in pairs. The first spacer 141 is annular and sleeved on the optical axis segment 1322, a first radial ridge 1411 is formed on the upper surface of the first spacer 141, and a first wedge-shaped surface 1412 is formed on the lower surface along the circumferential direction. The second gasket 142 is annular, and is also sleeved on the optical axis segment 1322 and located below the first gasket 141, a second radial rib 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 surface 1412 and the second wedge surface 1422, the coefficient of friction between the second radial ridge 1421 and the flange segment 1311 is greater than the coefficient of friction between the first wedge surface 1412 and the second wedge surface 1422, the gradients (α in fig. 4) of the first wedge surface 1412 and the second wedge surface 1422 are both greater than the thread rise angle (β in fig. 4) of the thread segment 1321, the annular inner diameters of the first washer 141 and the second washer 142 are both less than the thread outer diameter of the thread segment 1321, and the surface hardness of the locking element 14 is greater than the surface hardness of the connecting element 13.

In a particular embodiment, the coefficient of friction between the first radial ridge 1411 and the top inner wall of the mount 11 is 2.0 to 2.5 times the coefficient of friction between the first wedge face 1412 and the second wedge face 1422, and the coefficient of friction between the second radial ridge 1421 and the flange section 1311 is 2.0 to 2.5 times the coefficient of friction between the first wedge face 1412 and the second wedge face 1422. More specifically, the coefficient of friction between the first wedge 1412 and the second wedge 1422 is anywhere from 0.10 to 0.17, the coefficient of friction between the first radial ridge 1411 and the top inner wall of the mounting 11, and the coefficient of friction between the second radial ridge 1421 and the flange segment 1311 is anywhere from 0.20 to 0.35, and those skilled in the art can selectively choose the materials and surface coatings of the two shims to satisfy the specific relationship between the coefficients of friction.

In a specific embodiment, when the bolt is manufactured, the first gasket 141 and the second gasket 142 may be first sleeved on the optical axis bolt, and then a thread rolling process is performed on the upper portion of the optical axis bolt, so that the outer diameter of the thread (and the outer diameter of the thread section 1321) formed after thread rolling is larger than the annular inner diameters of the first gasket 141 and the second gasket 142, and thus the first gasket 141 and the second gasket 142 cannot fall off from the bolt.

In a specific embodiment, the surface hardness of the locking member 14 is selected from 460 to 510HV, which is greater than that of a high strength bolt of a general performance level. Wherein, the surface hardness of the 8.8-level high-strength bolt is 250-320 HV, the surface hardness of the 10.9-level high-strength bolt is 320-380 HV, and the surface hardness of the 12.9-level high-strength bolt is 380-430 HV, and the high-strength bolt can select one of the strength grades as a manufacturing standard.

Referring to fig. 7, after the connection member 13 is rotationally fastened with the target fastener, the first radial ridge 1411 and the top inner wall of the mounting seat 11 are pressed against each other, the second radial ridge 1421 and the flange section 1311 of the connection member 13 are pressed against each other, and the first wedge surface 1412 and the second wedge surface 1422 are pressed in engagement with each other. 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 segment 1311 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 gasket 141 and the top inner wall of the mount 11, and no relative sliding between the lower surface of the second gasket 142 and the upper surface of the flange segment 1311, which occurs only between the first wedge 1412 and the second wedge 1422.

When the connecting piece 13 is loosened, as the gradients of the first wedge-shaped surface 1412 and the second wedge-shaped surface 1422 are larger than the thread rise angle (alpha > beta) of the thread section 1321, the lifting amount of the two gaskets in the axial direction is larger than the climbing amount of the thread section 1321 in the axial direction, a stroke difference is formed between the two gaskets, and the feedback to the inside of the connecting piece 13 is to increase the axial pretightening force of the connecting piece 13, so that the loosening trend of the connecting piece 13 is reduced through the wedge-shaped effect, and therefore, the loosening cannot occur.

In the above preferred embodiment, the thread segments 1321 are coarse threads, which have higher connection durability than fine threads, and thus can increase the service life of the connecting member 13. By setting the axial projection area of the flange section 1311 to be larger than that of the nut section 1312, a larger contact area is provided between the connecting member 13 and the locking member 14, and the locking effect can be improved. By providing the flange segment 1311 with an outer diameter approximately equal to the inner diameter of the mounting 11, stability and connection accuracy of the connector 13 during sliding in the mounting 11 can be ensured, and seizure, sliding wire, etc. caused by axial deflection of the connector 13 can be avoided.

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 13 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 13 from loosening, thereby improving the anti-loosening effect. Specifically, the friction coefficient between the first radial ridge 1411 and the top inner wall of the mounting seat 11 and the friction coefficient between the second radial ridge 1421 and the flange section 1311 are both greater than the friction coefficient between the first wedge-shaped surface 1412 and the second wedge-shaped surface 1422, so that the abrasion only occurs between the first wedge-shaped surface 1412 and the second wedge-shaped surface 1422, the loss to the top inner wall of the mounting seat 11 is greatly reduced, the mounting seat 11 can be protected, and the replacement of the anti-loose member 14 is more convenient. The first wedge-shaped surface 1412 and the second wedge-shaped surface 1422 are set in a way that the gradient is larger than the thread rise angle of the thread section 1321, so that when the thread section 1321 generates a loosening trend, the lifting amount of the two gaskets in the axial direction is larger than the climbing amount of the thread section 1321 in the axial direction, a stroke difference is formed between the two gaskets, the feedback to the inside of the connecting piece 13 is to increase the axial pretightening force of the connecting piece 13, and the loosening trend of the connecting piece 13 is reduced through the wedge-shaped effect, so that the loosening cannot occur. The annular inner diameters of the first gasket 141 and the second gasket 142 are smaller than the thread outer diameter of the thread section 1321, and the outer diameter of the optical axis section 1322 is smaller than the thread outer diameter of the thread section 1321, so that the first gasket 141 and the second gasket 142 can be always kept on the optical axis section 1322, the disassembly and assembly are convenient, the risks of missing, wrong installation or falling of the locking piece 14 can be eliminated, and the connecting piece 13 and the locking piece 14 can be used as an assembly and a vulnerable part for storage. By setting the surface hardness of the locking piece 14 to be larger than that of the connecting piece 13, the contact surface state of the connecting piece 13 and the gasket is more stable, and the abrasion is normal.

Referring to fig. 5, on the premise of the above arrangement mode, compared with the technical scheme without the anti-loosening element 14, the anti-loosening element 14 and the connecting element 13 have stable contact surface state and normal abrasion, the lock body assembly 10 can be controlled within 25% of pretightening force attenuation in the locking state within the design service life period (more than 3000 times of repeated locking and unlocking), and the design and use requirements are completely met, so that the reliable connection between the battery pack and the vehicle body is ensured.

It should be noted that the foregoing preferred embodiments are merely illustrative of the principles of the present application and are not intended to limit the scope of the present application. The above-mentioned setting modes can be adjusted by a person skilled in the art without departing from the principle of the present application, so that the present application can be applied to more specific application scenarios.

For example, in an alternative embodiment, although the above embodiment describes the locking member 14 as a combination of the first washer 141 and the second washer 142, this is only a preferred embodiment, and a person skilled in the art may adjust it as long as the adjusted locking member 14 can satisfy the condition that there is no relative rotation between the operating portion 131 and the top inner wall of the mounting seat 11 when being pressed.

For example, referring to fig. 8, in an alternative embodiment, the locking element 14 may be a washer, where the washer is sleeved on the optical axis 1322, the inner diameter of the washer is smaller than the outer diameter of the thread 1321, and the roughness of the upper surface of the washer is greater than the roughness of the lower surface of the washer. Preferably, the coefficient of friction between the upper surface of the gasket and the top inner wall of the mount 11 is 2.0 to 2.5 times the coefficient of friction between the lower surface of the gasket and the flange section 1311. So configured, when the gasket is compressed, there is no relative rotation between the top inner wall of the mounting 11 and the upper surface of the gasket, as the roughness of the upper surface is greater than the roughness of the lower surface, and the upper surface of the flange section 1311 of the connector 13 and the lower surface of the gasket can rotate relative to each other, which causes the wear surface to be transferred between the upper surface of the flange section 1311 and the lower surface of the gasket.

When the anti-loosening member 14 is a washer, the roughness of the upper surface of the washer is greater than that of the lower surface of the washer, so that no relative rotation is generated between the washer and the top inner wall of the mounting seat 11, and relative rotation can be generated between the connecting member 13 and the washer, so that the wearing surface is transferred between the washer and the connecting member 13, the wearing of the mounting seat 11 is reduced, and the maintenance convenience is improved. Through locating the optical axis section 1322 with the packing ring cover, and set up the external diameter of optical axis section 1322 and be less than the screw thread external diameter of screw thread section 1321, the internal diameter of packing ring is less than the screw thread external diameter of screw thread section 1321 for the packing ring can remain on optical axis section 1322 all the time, easy dismounting can also eliminate locking piece 14 neglected loading, wrong dress, or the risk that drops, and connecting piece 13 and packing ring can be equipped with the storehouse as sub-assembly and wearing part, realizes sub-assembly and target fastener and flows along with the car together, guarantees locking uniformity of locking mechanism.

Referring to fig. 9, in another alternative embodiment, the locking member 14 is a washer fixedly attached to the top inner wall of the mounting block 11. Specifically, a countersunk hole (not shown in the figure) is formed in the gasket, a threaded hole (not shown in the figure) is formed in the top inner wall of the mounting seat 11, and the countersunk screw 15 passes through the countersunk hole and is then screwed into the threaded hole, so that the gasket is fixedly connected to the top inner wall of the mounting seat 11. After the threaded connection, the outer surface of the countersunk head screw 15 is positioned inside the countersunk head hole and is not exposed. When so arranged, friction only occurs between the upper surface of the flange section 1311 and the lower surface of the gasket, as there is no relative rotation between the gasket and the top inner wall of the mounting 11 by the countersunk screws 15.

Through with packing ring fixed connection on the top inner wall of mount pad 11, can avoid producing the friction between packing ring and the top inner wall of mount pad 11, protect mount pad 11 to avoid wearing and tearing, improve the life of mount pad 11.

As another example, in another alternative embodiment, although the connection member 13 is described as a bolt, it may be replaced by a person skilled in the art as long as the replaced connection member 13 has the operation portion 131 and the fastening portion 132 and a condition of being fastened to the target fastener by rotation can be achieved. For example, in the case of keeping the connecting member 13 as a bolt, a person skilled in the art may adjust the specific arrangement of the operation portion 131 and the fastening portion 132, such as integrally arranging the operation portion 131 as the threaded section 1321, or the threaded section 1321 adopts fine threads, or omitting the flange section 1311 of the fastening portion 132, adjusting the diameter of the flange section 1311, or adjusting the nut section 1312 as an external twelve-angle nut or other special nuts. Besides bolts, the connecting piece 13 can be also provided with rotary buckles, at the moment, the threaded section 1321 of the connecting piece 13 is replaced by a transversely arranged hanging plate, the hanging plate is always positioned outside the mounting hole 111 of the mounting seat 11, the corresponding target fastener is provided with a long groove, two sides of the long groove are respectively provided with arc-shaped bulges with a certain gradient, the hanging plate rotates after passing through the long groove, and the hanging plate climbs along the arc-shaped bulges to realize the rotary fastening of the two.

For another example, although the above-mentioned coupling member 13 is described as being made of a material entirely containing a magnetic metal in an alternative embodiment, this embodiment is not a constant one, and the specific manufacturing material of the coupling member 13 can be adjusted by those skilled in the art based on the specific application scenario. For example, the connecting member 13 may be integrally made of a material containing no magnetic metal such as stainless steel; for example, when the magnetic metal material is used for manufacturing, it is sufficient to ensure that at least the nut section 1312 of the operating portion 131 and the magnetic member are magnetically attracted to each other in the manufactured connection member 13. For example, the nut segment 1312 may be made of a material containing magnetic metal, while the flange segment 1311 and the securing portion 132 may be made of other metals, or the connecting member 13 may be integrally made of a material not containing magnetic metal, while the nut segment 1312 may be bonded, welded, clamped with a magnetic member, such as a magnetic metal or magnet, etc.

For another example, in another alternative embodiment, the mounting seat 11 may be configured in a cylindrical configuration, and those skilled in the art may adjust the configuration, including but not limited to the thickness, size, etc. of the mounting hole 111. For example, a chamfer may be further disposed at the bottom of the mounting hole 111, so as to facilitate the top end of the bolt to smoothly enter the mounting hole 111.

For another example, in another embodiment, the setting parameters of the two gaskets can be adjusted by a person skilled in the art on the premise that the locking piece 14 adopts the combination of the first gasket 141 and the second gasket 142. For example, one skilled in the art may adjust the slope of the first wedge 1412 and the second wedge 1422, the number, shape, and the like of the radial ribs, the annular inner diameter of the first 141 and the second 142 shims, the surface hardness of the locking element 14, and the like.

Of course, the alternative embodiments described above, as well as the alternative and preferred embodiments, may also be used in a cross-fit manner, thereby combining new embodiments to suit more specific application scenarios.

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

The battery pack has the advantages that the lock body assembly 10 with the anti-loose piece 14 is arranged on the shell, so that the connection reliability of the battery pack can be guaranteed, the maintenance convenience of the battery pack is improved, the manufacturing cost of the battery pack is reduced, the connection piece 13 and the target fastener are enabled to flow along with the vehicle, and the locking consistency of the locking mechanism is guaranteed.

Referring to fig. 1, 6 and 7, the present application further provides a locking and unlocking device, where the locking and unlocking device includes a driving mechanism (not shown in the drawings) and a locking and unlocking head 40, the driving mechanism is in transmission connection with the locking and unlocking head 40, a magnetic member 43 is disposed on the locking and unlocking head 40, and the magnetic member 43 is configured to be magnetically attracted to the lower portion of the operating portion 131 in the lock body assembly 10 in the foregoing embodiment. Wherein at least the nut portion of the connector 13 in the lock body assembly 10 is made of magnetic metal.

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 head 40, and the driving motor drives the locking and unlocking head 40 to rotate through the output shaft and the speed reducer when being electrified. The lifting action of the locking and unlocking head 40 can be achieved in various manners, for example, the locking and unlocking device is integrally fixed on the lifting platform of the power conversion robot, and the locking and unlocking device is integrally lifted along with the lifting of the lifting platform. For another example, the locking and unlocking device is further provided with an electric push rod, and the driving motor is connected to the output shaft of the electric push rod, so that the driving motor, the speed reducer and the locking and unlocking head 40 can be synchronously lifted.

Referring to fig. 6 and 7, in a preferred embodiment, a sleeve structure 41 is formed at the top of the locking and unlocking head 40, a transmission structure 42 is formed at the bottom, a magnetic member 43 is disposed inside the sleeve structure 41, and the locking and unlocking head 40 is in transmission connection with the speed reducer through the transmission structure 42. Specifically, the sleeve structure 41 is a stepped groove, the diameter of the barrel at the barrel opening is larger than that of the barrel bottom, the barrel opening is of a plum blossom tooth structure which can be matched with the nut of the connecting piece 13, and the nut can be at least partially embedded in the plum blossom tooth structure. The transmission structure 42 is a non-circular hole, which in the present application may be a rectangular hole or a square hole, and correspondingly, the section of the output shaft end of the speed reducer is rectangular or square, and the output shaft is inserted into the hole, so as to realize transmission between the speed reducer and the locking and unlocking head 40.

The magnetic member 43 is a permanent magnetic top core in the present application, the permanent magnetic top core includes a cylinder 431 and a top plate 432, and the sleeve structure 41 is communicated with the transmission structure 42 through a through hole, and the aperture of the through hole is equal to that of the cylinder 431 of the permanent magnetic top core. The cylinder 431 is provided with a first pin hole (not shown) along a radial direction thereof, the locking and unlocking head 40 is provided with a second pin hole 44 along a radial direction thereof at a position of the through hole, and the pin shaft 45 passes through the first pin hole and the second pin hole 44 to connect the cylinder 431 with the locking and unlocking head 40. After the connection, the upper surface of the top plate 432 of the permanent magnet top core is flush with the bottom of the quincuncial teeth of the sleeve structure 41.

In the ascending process of the locking head 40, after the sleeve structure 41 and the nut of the connecting piece 13 are successfully recognized, the permanent magnet top core and the nut of the connecting piece 13 are magnetically attracted to adsorb the connecting piece 13 on the locking and unlocking head 40, so that after unlocking is completed, the locking piece 14 on which the connecting piece 13 is communicated descends together with the locking and unlocking head 40, and the locking and unlocking head cannot fall down.

In an alternative embodiment, the second pin hole 44 may be configured as a long hole extending in the axial direction of the unlocking head 40, and the pin 45 may be movable in the longitudinal direction of the long hole, so that the upper surface of the top plate 432 protrudes from the top surface of the sleeve structure 41 when the pin 45 is moved to the top of the long hole, and the upper surface of the top plate 432 is flush with the bottom of the quincuncial teeth of the sleeve structure 41 when the pin 45 is moved to the bottom of the long hole.

In the lifting process of the locking head 40, when the sleeve structure 41 is close to the connecting piece 13, under the action of magnetic attraction, the permanent magnet top core moves along the strip hole, so that the magnetic attraction between the top plate 432 and the screw cap is realized, the connecting piece 13 is adsorbed on the locking head 40, preliminary positioning is realized, then the sleeve structure 41 is continuously lifted, the cap is recognized with the screw cap part, and after the cap is successfully recognized, the permanent magnet top core is lowered to the lowest position. After the unlocking is completed, the locking piece 14 to which the connecting piece 13 communicates descends together with the locking and unlocking head 40, and does not fall.

According to the locking and unlocking device, the magnetic piece 43 is arranged on the locking and unlocking head 40, the connecting piece 13 is adsorbed on the locking and unlocking head 40 by utilizing the magnetic attraction effect in the locking and unlocking process, the locking and unlocking stability and the replacement convenience of the battery pack are improved, and the locking and unlocking process is ensured to be carried out smoothly. Through at locking and unlocking head 40 top formation sleeve structure 41, set up the inside at sleeve structure 41 with magnetic part 43, can utilize sleeve structure 41 and magnetic part 43 to carry out dual location to connecting piece 13, guarantee the dismouting precision of connecting piece 13, avoid connecting piece 13 to drop. By providing the top plate 432 on the permanent magnet top core, the magnetic attraction force can be increased, and the magnetic attraction effect of the locking head 40 and the connecting piece 13 can be ensured. The second pin hole 44 is a strip hole, so that the permanent magnet top core and the connecting piece 13 can be magnetically attracted and positioned by utilizing the movement of the pin shaft 45, and the cap recognition precision of the locking head 40 can be ensured. By arranging the pin shafts 45 to move to the bottom of the strip holes, the upper surface of the top plate 432 is flush with the bottom of the inner teeth of the sleeve structure 41, so that the positioning stability of the connecting piece 13 can be ensured, the connecting piece 13 can be stably positioned under the double positioning of the inner teeth bottom of the sleeve and the permanent magnet top core, and the connecting piece is not easy to deflect or fall.

Of course, the specific arrangement of the locking and unlocking means is not exclusive, and can be adjusted by those skilled in the art without departing from the principles of the present application. For example, the specific arrangement mode of the driving mechanism is not unique, 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 head 40 can be adjusted by a person skilled in the art, for example, after adjustment of the nut of the connecting piece 13, the sleeve structure 41 is adapted; for another example, the driving structure 42 may be provided as a protrusion instead of a recess. In another alternative embodiment, the setting position and setting manner of the magnetic member 43 can be adjusted, so long as the adjusted technical solution can realize magnetic attraction to the connecting member 13. For example, the magnetic member 43 may be a magnetic sheet, which is adhered or welded to the bottom of the sleeve structure 41; alternatively, the magnetic member 43 may be an electromagnetic coil, and when energized, generates a magnetic field to magnetically engage the connector 13.

Referring back to fig. 1 and 6, the present application also provides a locking mechanism comprising a locking assembly 20 and the lock body assembly 10 of any of the embodiments described above, the lock body assembly 10 being cooperatively associated with the locking assembly 20.

In one embodiment, the locking assembly 20 includes a fixed plate 21, a floating plate 22, and a locking member 23, the fixed plate 21 being fixedly connectable to a vehicle, the floating plate 22 being floatably provided to the fixed plate 21, the locking member 23 being fixedly provided to the floating plate 22. Specifically, the fixing plate 21 is disposed on the chassis beam 30 of the vehicle by screwing, welding or clamping, and the chassis beam 30 and the fixing plate 21 are provided with through holes allowing the upper portion of the connecting piece 13 to pass through, two opposite sides of the fixing plate 21 are bent upwards to form a floating space with the bottom side wall, and the floating plate 22 is limited in the floating space and can float freely in the floating space. The middle part of the floating plate 22 is also integrally formed with a nut as a locking member 23, and both side edges of the fixed plate 21 are surrounded with openings which allow the nut to protrude therethrough and float within the limits of the openings. The bottom of the floating plate 22 is provided with a chamfer at a position corresponding to the nut, when the bolt is driven by the locking and unlocking device to rotate and ascend, cap recognition of the bolt and the nut is realized under the guidance of the chamfer at the upper end of the bolt and the chamfer at the bottom of the floating plate 22, and the bolt is connected with the nut in a threaded manner after continuously rotating and ascending.

The locking mechanism of this application through set up lockpiece 14 in lock body assembly 10, can improve locking reliability and the durability of using of locking mechanism, prolongs the life of locking mechanism, reduces the mechanism complexity to connecting piece 13 can be with the circulation of target fastener together on-vehicle, guarantees the locking uniformity of locking mechanism. By providing the locking assembly 20 with the floating plate 22 floating relative to the fixed plate 21, the locking difficulty of the locking mechanism can be reduced, and the locking assembly 20 can be replaced more conveniently with lower maintenance cost.

Of course, the specific arrangement of the locking assembly 20 is not limited thereto, and those skilled in the art can adjust the arrangement provided that it is capable of mating with the lock body assembly 10. For example, in an alternative embodiment, the locking assembly 20 may further include only the fixing plate 21 and the locking member 23, where the locking member 23 is fixedly disposed on the fixing plate 21, and the fixing plate 21 is fixedly disposed on the vehicle.

The application also provides an electric automobile, this electric automobile includes automobile body, battery package and the locking mechanism of any embodiment that above-mentioned, battery package passes through locking mechanism and is connected with the chassis of automobile body. Specifically, the mounting seat 11 of the lock body assembly 10 is fixedly connected to the battery pack, the locking assembly 20 is arranged on the chassis cross beam 30 of the vehicle, and the battery pack is fixed on the chassis of the vehicle through locking of the lock body assembly 10 and the locking assembly 20.

The vehicle of this application adopts above-mentioned locking mechanism and the automobile body connection that has locking piece 14 through the battery package of vehicle, can improve the connection reliability between battery package and the vehicle, reduces the security risk of vehicle for the maintenance of vehicle is more convenient. And the connecting piece 13 can flow with the vehicle together with the locking assembly 20, so that the locking consistency of the locking mechanism is ensured.

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

In the locking mechanism unlocking process, the locking and unlocking device operates, the locking and unlocking head 40 ascends, the locking and unlocking head 40 penetrates into the mounting seat 11 and is in butt joint with a nut of the bolt, and at the moment, the permanent magnet top core is magnetically attracted with the nut. After the butt joint is finished, the unlocking torque is applied to the bolt by the unlocking lock 40, the bolt is driven by the unlocking lock 40 to drop down steadily, the nut is withdrawn from the bolt, after the bolt is completely separated from the nut, the bolt, the first gasket 141 and the second gasket 142 continue to drop down along with the unlocking lock 40 until the bolt is withdrawn from the mounting seat 11, at this time, the bolt is magnetically adsorbed on the unlocking lock 40, and the first gasket 141 and the second gasket 142 are sleeved on an optical axis segment 1322 of the bolt.

In the locking process of the locking mechanism, the locking and unlocking device operates to drive the locking and unlocking head 40 to ascend, the locking and unlocking head 40 enters the mounting seat 11 together with the bolt, the first gasket 141 and the second gasket 142 which are magnetically attracted with the locking and unlocking head, and the bolt is guided to the inner wall of the mounting seat 11 through the flange section 1311 in the ascending process of the bolt, so that the posture of the bolt is kept stable. When the bolt passes through the mounting hole 111, the chamfer at the top end of the bolt contacts with the chamfer at the middle part of the floating plate 22, and the floating plate 22 floats to align the nut with the bolt, so that the first tooth meshing of the bolt and the nut is realized. The locking head 40 is then raised while applying a reverse locking torque to the bolt, the threaded section 1321 of the bolt effecting a threaded tightening with the nut, and when tightened in place, the first and second shims 141 and 142 are compressed between the flange section 1311 and the top inner wall of the mount 11.

When the bolt is vibrated to generate loosening trend, the first gasket 141 and the second gasket 142 rotate relatively, the first wedge 1412 and the second wedge 1422 slide relatively, the lifting amount in the axial direction is larger than the climbing amount of the thread 1321 in the axial direction, and a stroke difference is formed between the first wedge 1412 and the second wedge 1422, and the stroke difference increases the axial pretightening force of the connecting piece 13, so that the loosening trend of the connecting piece 13 is reduced.

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 present 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 be within the scope of the present application.

Claims

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

2. The lock assembly of claim 1, wherein the anti-loose member comprises:

3. The lock assembly of claim 2, wherein a coefficient of friction between the first radial ridge and a top inner wall of the mount is 2.0 to 2.5 times a coefficient of friction between the first wedge-shaped face and the second wedge-shaped face; and/or

4. The lock assembly of claim 2, wherein the upper portion of the securing portion is a threaded section that is capable of passing through the mounting hole and being threaded to the target fastener.

5. The lock assembly of claim 4 wherein the first wedge surface and the second wedge surface each have a slope greater than the thread angle of the thread segments.

6. The lock assembly according to claim 4, wherein the lower portion of the fastening portion is an optical axis section, an upper end of the optical axis section is connected to the threaded section, a lower end of the optical axis section is connected to the operating portion, and the first gasket and the second gasket are sleeved on the optical axis section.

7. The lock assembly of claim 6, wherein the outer diameter of the optical axis segment is less than the outer diameter of the thread segment, and the annular inner diameters of the first and second shims are both less than the outer diameter of the thread segment.

8. The lock assembly according to claim 1, wherein the locking member is a washer, the washer is sleeved on a lower portion of the fastening portion, and a roughness of an upper surface of the washer is greater than a roughness of a lower surface thereof.

9. The lock assembly according to claim 8, wherein a coefficient of friction between an upper surface of the washer and a top inner wall of the mount is 2.0 to 2.5 times a coefficient of friction between a lower surface of the washer and the operating portion.

10. The lock assembly of claim 8, wherein the upper portion of the securing portion is a threaded section that is capable of passing through the mounting hole and being threaded to the target fastener.