Hanging seat, hanging device, battery replacement battery pack and electric vehicle

Abstract

The application provides a hanging seat, a hanging device, a battery pack and an electric vehicle. The hanging seat is used for locking with a hanging part to mount the battery pack on the electric vehicle. The hanging seat comprises a floating mechanism. At least two ends of the floating mechanism are movably connected to the electric vehicle. The floating mechanism has a locking groove which is connected with a threaded part on the hanging part. The battery pack has a plurality of hanging parts, and the chassis has a plurality of floating mechanisms. The hanging parts and the floating mechanisms are connected one by one and can be adjusted by each floating mechanism. The above structure can reduce the overall manufacturing precision of the chassis and the manufacturing precision of the battery pack. In the process of replacing the battery pack, the positioning precision requirement is also reduced, thereby simplifying the production process and improving the production efficiency.

Description

[0001] This application is a divisional application of the Chinese invention patent with the application number 2021116737836 and the name "hanging seat, hanging device, battery replacement battery pack and electric vehicle", the application date of which is December 31, 2021. TECHNICAL FIELD

[0002] The present application relates to a hanging seat, a hanging device, a battery replacement battery pack and an electric vehicle. BACKGROUND

[0003] The existing battery pack setting mode of the electric vehicle is generally divided into fixed type and replaceable type, wherein the fixed type battery pack is generally fixed on the vehicle, and the vehicle is directly used as the charging object during charging. The replaceable battery pack is generally fixed on the adapter base of the electric vehicle by a movable mounting mode, and the battery pack can be removed for separate replacement or charging operation. After the replaced battery pack is charged, it is installed on the vehicle.

[0004] In the prior art, the replacement mode of the battery pack includes manual, automatic and various means. Regardless of which means, when the battery is installed on the electric vehicle, the battery pack needs to be locked on the adapter base of the electric vehicle. At present, a plurality of lock shafts are arranged on the battery pack, and the lock shafts are hung in the lock groove of the base to realize the connection between the battery pack and the electric vehicle. However, the above-mentioned mode has high requirements for the overall manufacturing precision of the chassis and the manufacturing precision of the battery pack, and the positioning precision requirement is also high during the replacement of the battery pack.

[0005] The battery pack in the prior art is generally locked on the bottom of the electric vehicle by a buckle. In the process of installing the battery pack, the battery replacement equipment needs to move the battery pack to a certain height in the vertical direction and then move the battery pack to the locking position in the horizontal direction. On the one hand, this leads to a complex structure of the battery replacement equipment and high requirements for electrical control. On the other hand, the space for horizontal movement of the battery pack needs to be reserved on the bottom of the electric vehicle, which makes the movement of the battery pack limited by the space on the bottom of the electric vehicle, resulting in high difficulty in locking control of the battery pack and low efficiency of battery replacement. SUMMARY

[0006] The technical problem to be solved by the present application is to overcome the defects of high difficulty in locking control of the battery pack, low efficiency of battery replacement and limitation by the space on the bottom of the electric vehicle in the prior art, and to provide a hanging seat, a hanging device, a battery replacement battery pack and an electric vehicle.

[0007] The present application solves the above technical problems by the following technical scheme:

[0008] A hanging seat is used for locking with a hanging piece to install a battery pack on an electric vehicle, the hanging seat comprising: a floating mechanism, at least two ends of the floating mechanism being movably connected to the electric vehicle; the floating mechanism having a locking groove, the locking groove being matchedly connected with a threaded part on the hanging piece.

[0009] In the scheme, the hanging piece is hung on the hanging seat by rotating, which does not need a large gap between the hanging piece and the hanging seat, so that the hanging piece can be stably hung on the hanging seat, improving the stability of the battery pack hanging. Meanwhile, the floating mechanism is movably connected to the electric vehicle at least at two ends, so that the floating mechanism can be self-adjusted during the process of hanging the battery pack, and the threaded part can be matchedly connected with the locking groove. There are multiple hanging pieces on the battery pack, and multiple floating mechanisms on the electric vehicle, the hanging pieces and the floating mechanisms are connected one by one, and can be realized by self-adjustment of each floating mechanism, reducing the overall manufacturing precision of the chassis and the manufacturing precision of the battery pack, and the positioning accuracy requirement is also reduced during the replacement of the battery pack, thereby simplifying the production process and improving the production efficiency.

[0010] Preferably, the floating mechanism is connected to the electric vehicle by an elastic member.

[0011] In the scheme, the floating mechanism is movably connected to the electric vehicle by the elastic member, so that the elastic member can store energy when the threaded part is connected with the locking groove, and the floating mechanism can be reset by the energy stored in the elastic member when the threaded part is removed from the locking groove. During the resetting process, the elastic member can also provide a buffer for the floating mechanism to prevent the floating mechanism and the electric vehicle from being impacted and affecting their service life. The floating mechanism is connected to the electric vehicle by the elastic member, so that the floating mechanism can realize multi-degree-of-freedom movement and improve the movable range of the floating mechanism.

[0012] Preferably, the elastic member is a spring.

[0013] In the scheme, the above structure has the characteristics of convenient installation, long service life and low cost.

[0014] Preferably, the floating mechanism comprises a floating body, and the plurality of elastic members are respectively connected to the four sides of the floating body.

[0015] In the scheme, the elastic members are connected to the four sides of the floating body, improving the stability of the floating body.

[0016] Preferably, the floating mechanism further comprises a protruding part, the protruding part extending outward from the floating body, and the locking groove is arranged in the floating body and the protruding part.

[0017] In the scheme, the above structure is adopted, the locking groove is arranged in the floating mechanism and the protruding part, the depth of the locking groove is increased, and when the locking groove cooperates with the threaded part, the connecting area of the two is increased, so that the stable connection of the locking groove and the threaded part is realized; the protruding part extends outward from the floating body, so that there is no large gap between the floating mechanism and the fixed mechanism to prevent the impact of the protruding part and the floating mechanism, and the compactness of the floating mechanism mounting structure is improved.

[0018] Preferably, the floating mechanism further has a guide hole located at the top and / or bottom of the locking groove.

[0019] In the scheme, the guide hole at the bottom of the locking groove can make the threaded part extend into the locking groove from the guide hole and cooperate with the locking groove, so as to facilitate the connection of the threaded part and the locking groove; through the guide hole at the top of the locking groove, the interference of the hanging seat on the movement of the threaded part can be reduced during the cooperation of the locking groove and the threaded part. During rotation, as the threaded part moves upward, the upper end of the threaded part can extend out of the locking groove from the guide hole, thereby preventing the threaded part and the hanging seat from being extruded and damaged, and improving the service life of the threaded part and the locking groove.

[0020] Preferably, the guide hole has a first guide sliding surface.

[0021] In the scheme, the above structure is adopted, the threaded part extends into the locking groove from the guide hole through the first guide sliding surface, which has the characteristics of small resistance; and / or, the threaded hole extends out of the locking groove from the guide hole through the first guide sliding surface, which has the characteristics of small resistance.

[0022] Preferably, the hanging seat further comprises a fixed mechanism, the floating mechanism is floatingly connected in the fixed mechanism, and the fixed mechanism is fixedly connected to the electric vehicle.

[0023] In the scheme, the above structure is adopted, the floating mechanism is floatingly connected in the fixed mechanism, the floating mechanism can be protected by the mechanism, the damage of the floating mechanism by the outside world is reduced, and the service life of the floating mechanism is improved; in addition, the floating mechanism is connected to the electric vehicle through the fixed mechanism, the contact area of the hanging seat and the electric vehicle is increased, and the stability of the connection of the hanging seat and the electric vehicle is improved.

[0024] Preferably, the fixed mechanism has a floating cavity, and the floating mechanism is located in the floating cavity and movably connected with the fixed mechanism.

[0025] In the scheme, the above structure is adopted, the floating mechanism is protected by the fixing mechanism, and the movable space is provided for the floating mechanism by the floating cavity, so as to prevent the collision between the fixing mechanism and the floating mechanism, and the service life of the two is improved.

[0026] Preferably, the bottom of the fixing mechanism has a first through hole, the first through hole is communicated with the floating cavity, and the first through hole is used for avoiding the hanging piece.

[0027] In the scheme, the hanging piece can first extend into the floating cavity through the first through hole, and then the hanging piece extending into the floating cavity extends into the locking groove and cooperates with the locking groove. The above structure facilitates the extension of the hanging piece into the floating cavity.

[0028] Preferably, the top of the fixing mechanism has a second through hole, the second through hole is communicated with the first through hole through the floating cavity, and the second through hole is used for avoiding the hanging piece.

[0029] In the scheme, the above structure can reduce the interference of the hanging seat on the movement of the hanging piece during the cooperation of the locking groove and the hanging piece. That is, during the rotation, as the hanging piece moves upward, the upper end of the hanging piece can extend out of the hanging seat from the second through hole, thereby preventing the extrusion of the hanging piece and the hanging seat and causing damage, and the service life of the hanging piece and the hanging seat is improved.

[0030] Preferably, when the hanging seat cooperates with the hanging piece, the locking groove, the first through hole and the second through hole are all penetrated by the hanging piece.

[0031] In the scheme, the above structure can stably connect the locking groove and the threaded part, and stably cooperate the hanging seat and the hanging piece.

[0032] Preferably, the fixing mechanism comprises a fixing plate, a limiting plate and two connecting plates, the two connecting plates are symmetrically arranged at two ends of the fixing plate, the limiting plate is connected to the top of the connecting plate and is used for limiting the displacement of the floating mechanism in the vertical direction, and the fixing plate, the connecting plate and the limiting plate enclose the floating cavity.

[0033] In the scheme, the floating cavity enclosed by the fixed plate, the limiting plate and the two connecting plates can provide the space required by the floating body, and the structure has the characteristics of convenient processing, simple structure and low cost. The fixed plate can increase the connection area of the hanging seat and the electric vehicle, and improve the stability of the connection. In the process of the hanging piece extending into the locking groove, a large upward displacement will be generated. At this time, the limiting plate can prevent the floating body from generating a large upward displacement and causing damage to the elastic piece, thereby improving the service life of the floating mechanism. The connecting plate can limit the horizontal displacement of the floating body while connecting the fixed plate and the limiting plate, thereby preventing the floating body from generating a large displacement and causing damage to the elastic piece. The structure can improve the service life of the floating mechanism.

[0034] Preferably, the first through hole is arranged on the fixed plate.

[0035] Preferably, the second through hole is arranged on the limiting plate.

[0036] In the scheme, the structure is adopted, so that the fixed plate is connected with the electric vehicle, the first through hole is arranged on the fixed plate, the hanging piece is conveniently extended into the locking groove and matched with the locking groove, and / or the limiting plate limits the displacement of the floating mechanism, the second through hole is arranged on the limiting plate, the hanging piece is conveniently extended out of the locking groove, the extrusion of the threaded part and the limiting plate is prevented, and the service life of the threaded part and the limiting plate is improved.

[0037] Preferably, the fixed plate has a plurality of mounting holes, and the mounting holes are arranged at each corner of the fixed plate, so as to connect the fixed mechanism with the electric vehicle.

[0038] In the scheme, the structure is adopted, so that the fixed plate is connected with the electric vehicle through the mounting holes, and the mounting holes are arranged at each corner of the fixed plate, thereby improving the connection stability of the fixed plate and the electric vehicle.

[0039] Preferably, the number of the limiting plates is two, the limiting plates are connected with the connecting plates respectively, the limiting plates have grooves respectively, and the grooves correspond to each other and form the second through hole.

[0040] In the scheme, the structure is adopted, so that the connection of the limiting plates and the connecting plates is more reliable.

[0041] Preferably, the connecting plate has a connecting hole, and the elastic piece is connected with the connecting hole.

[0042] In the scheme, the structure is adopted, the connecting hole is connected with the elastic piece, the connecting mode is simple, the installation is convenient, the connecting hole is arranged on the connecting plate, the gap is kept between the floating body and the fixed plate and the limiting plate, the impact between the floating body and the fixed plate and the limiting plate is prevented, and the service life of the floating body, the fixed plate and the limiting plate is prolonged.

[0043] Preferably, the hanging piece has external threads, the locking groove has internal threads, and the external threads are connected to the internal threads to connect the battery pack to the floating mechanism.

[0044] In the scheme, the structure is adopted, the connecting mode is repeated, the structure is simple, the connection is convenient, and the cost is low.

[0045] A hanging device comprises a hanging piece and a hanging seat as described above.

[0046] In the scheme, the structure is adopted, the hanging piece and the hanging seat are applied to the hanging device, the overall manufacturing precision of the chassis and the manufacturing precision of the battery pack are reduced, the positioning precision requirement is reduced during the replacement of the battery pack, the production process is simplified, and the production efficiency is improved.

[0047] Preferably, the hanging piece comprises a guide part and a threaded part, and the guide part is arranged at the top end of the threaded part.

[0048] In the scheme, the structure is adopted, during the connection of the hanging piece and the hanging seat, the guide part is first inserted into the hanging seat to guide the threaded part, then the threaded part is inserted into the locking groove to cooperate with the locking groove.

[0049] And / or, the guide part guides the hanging piece to extend out of the hanging seat, so that the extrusion of the hanging piece and the hanging seat is prevented, the damage of the hanging piece and the hanging seat is prevented, and the service life of the hanging piece and the hanging seat is prolonged.

[0050] Preferably, the top end of the guide part has a second guide surface.

[0051] In the scheme, the structure is adopted, the guide part is inserted into or out of the hanging seat, and the resistance is small.

[0052] Preferably, the guide part and the threaded part are integrally formed.

[0053] In the scheme, the structure is adopted, the structure is simple, the processing is convenient, the threaded part can be moved to the locking groove along the guide part, the cooperation between the threaded part and the locking groove can be realized by external force, and the operation is convenient.

[0054] Preferably, the guide part and the threaded part are provided separately.

[0055] In the present solution, the above structure is adopted, and when one of the guide part and the threaded part is damaged, the damaged guide part and threaded part are only needed to be replaced to enable normal use, thereby reducing the use cost.

[0056] Preferably, the hanging device further comprises a mounting shell, a first engaging member and a second engaging member, the first engaging member is fixed in the mounting shell, the second engaging member is connected with the hanging member, and the second engaging member is located in the mounting shell and is movable in the mounting shell to switch between a first state and a second state; in the first state, the first engaging member and the second engaging member are engaged; in the second state, the second engaging member is disengaged from the first engaging member, and the second engaging member drives the hanging member to rotate.

[0057] In the present solution, the above structure is adopted, and in the first state, the first engaging member and the second engaging member are engaged, so that the second engaging member can be limited by the first engaging member to prevent the second engaging member from rotating, and then the hanging member can be limited by the second engaging member to improve the stability of the hanging member. In the second state, under the action of an external force, the second engaging member moves upward in the mounting shell, so that the second engaging member is disengaged from the first engaging member. After being disengaged, the second engaging member can drive the hanging member to rotate without the limitation of the first engaging member, so that in the second state, the hanging member can be connected to the hanging seat after being rotated by a certain angle by the second engaging member, thereby realizing the hanging of the battery pack and the hanging seat.

[0058] Preferably, the second engaging member comprises a matching part, an elastic part and an engaging part which are sequentially arranged from top to bottom, the two ends of the elastic part are respectively in abutment with the matching part and the engaging part, and the lower end of the hanging member is connected with the matching part; in the first state, the engaging part and the first engaging member are engaged, and the matching part is disengaged from the engaging part; in the second state, the engaging part is disengaged from the first engaging member, and the matching part cooperates with the engaging part to realize the rotation of the engaging part, the matching part and the hanging member.

[0059] In the present solution, the above structure is adopted, and in the first state, the engaging part and the first engaging member are engaged. After being engaged, the engaging part cannot rotate under the limitation of the first engaging member. At this time, the matching part is disengaged from the engaging part under the action of the elastic part. In the second state, under the action of an external force, the engaging part moves upward to be disengaged from the first engaging member, and the matching part extends into the engaging part to cooperate with the engaging part. At this time, under the action of the external force, the engaging part can drive the matching part and the hanging member to rotate by a certain angle to be connected to the hanging seat, thereby realizing the hanging of the battery pack and the hanging seat.

[0060] A battery pack for battery replacement, comprising a battery pack and a hanging device as described above.

[0061] In the present scheme, the hanging device is applied to the battery pack for battery replacement in the above structure, which can reduce the overall manufacturing precision of the chassis and the manufacturing precision of the battery pack, and the positioning precision requirement is also reduced during the replacement of the battery pack, thereby simplifying the production process and improving the production efficiency.

[0062] Preferably, the battery pack comprises a battery pack body and a battery rack, the battery rack is arranged circumferentially along the outer surface of the battery pack body, and the hanging device further comprises a mounting shell, and the hanging pieces are connected with the battery pack body and the battery rack respectively through the mounting shell.

[0063] In the present scheme, the mounting shell is connected with the battery pack body and the battery rack respectively in the above structure, which improves the stability of the battery pack hanging on the chassis. That is, the hanging piece located on the battery pack body and the mounting shell located on the battery rack can both realize the connection with the battery pack for battery replacement, thereby improving the stability of the battery pack for battery replacement hanging on the chassis.

[0064] Preferably, the battery pack body has a reinforcing beam, the mounting shell penetrates the reinforcing beam and is connected with the upper surface of the reinforcing beam through a fixing base located on the side wall of the mounting shell, the bottom of the hanging piece is connected with the mounting shell, and the hanging piece penetrates the reinforcing beam and the battery pack body and protrudes from the upper surface of the battery pack body.

[0065] In the present scheme, the connection between the hanging piece and the battery pack body is realized by the connection between the fixing base and the reinforcing beam in the battery pack body in the above structure. The part of the hanging piece protruding from the upper surface of the battery pack body can realize the hanging with the hanging seat, thereby realizing the hanging of the battery pack body on the chassis of the electric vehicle.

[0066] Preferably, the hanging device further comprises a sealing piece, the sealing piece is connected to the end of the mounting shell away from the reinforcing beam, and is used for sealing the battery pack body and the mounting shell, one end of the sealing piece extends into the mounting shell and is attached to the inner wall of the mounting shell, and the other end of the sealing piece is connected to the upper surface of the battery pack body.

[0067] In the present scheme, the external objects are prevented from entering the battery pack from the mounting shell by the sealing piece, which affects the service life of the battery pack.

[0068] Preferably, the mounting shell penetrates the battery rack and is connected with the lower surface of the battery rack through a fixing base located at the bottom of the mounting shell, and the hanging piece penetrates the battery rack and protrudes from the upper surface of the battery rack.

[0069] In the present scheme, the above structure is adopted, the fixing base is connected with the lower surface of the battery holder, the pulling force received by the mounting shell acts on the lower surface of the battery holder, so that the bolt is not subjected to the pulling force, thereby preventing the bolt from being damaged and loosened, and further improving the reliability of the connection between the battery pack and the chassis of the electric vehicle.

[0070] An electric vehicle comprises the hitch seat as described above, or the electric vehicle comprises the battery replacement battery pack as described above.

[0071] The positive progress effect of the present application is that:

[0072] By arranging the floating mechanism in the hitch seat, the floating mechanism is movably connected at least at two ends to the electric vehicle, and the hitching member is connected to the hitch seat in a rotating manner, which does not require a large gap between the hitching member and the hitch seat, thereby enabling the hitching member to be stably hitched to the hitch seat, improving the stability of the battery pack hitching. At the same time, during the hitching of the battery pack, the floating mechanism can be self-adjusted, so that the threaded part can be matched with the locking groove, thereby realizing the hitching of the hitching member to the hitch seat. There are multiple hitching members on the battery pack, and multiple floating mechanisms on the electric vehicle, and the hitching members and the floating mechanisms are connected one by one, and can be realized by self-adjustment of each floating mechanism. The above structure can reduce the overall manufacturing precision of the chassis and the manufacturing precision of the battery pack, and the positioning precision requirement during the replacement of the battery pack is also reduced, thereby simplifying the production process and improving the production efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0073] Figure 1 It is a schematic view of the hitch seat in embodiment 1 of the present application.

[0074] Figure 2 It is a first perspective view of the hitch seat in embodiment 1 of the present application.

[0075] Figure 3 It is a second perspective view of the hitch seat in embodiment 1 of the present application.

[0076] Figure 4 It is a third perspective view of the hitch seat in embodiment 1 of the present application.

[0077] Figure 5 It is an exploded view of the hitch seat in embodiment 1 of the present application.

[0078] Figure 6 It is a sectional view of the hitching device in embodiment 2 of the present application.

[0079] Figure 7 It is a first partial perspective view of the hitching device in embodiment 2 of the present application.

[0080] Figure 8 Figure 2 is a second part perspective view of the hanger device in the embodiment 2 of the present application;

[0081] Figure 9 Figure 3 is a third part perspective view of the hanger device in the embodiment 2 of the present application;

[0082] Figure 10 Figure 4 is a part exploded view of the hanger device in the embodiment 2 of the present application;

[0083] Figure 11 Figure 5 is a part view of the battery swap pack in the embodiment 3 of the present application;

[0084] Figure 12 Figure 6 is a first part perspective view of the battery swap pack in the embodiment 3 of the present application;

[0085] Figure 13 Figure 7 is a second part perspective view of the battery swap pack in the embodiment 3 of the present application;

[0086] Figure 14 Figure 8 is a cross-sectional view of the middle region of the battery swap pack in the embodiment 3 of the present application;

[0087] Figure 15 Figure 9 is a perspective view of the battery swap pack in the embodiment 3 of the present application. DETAILED DESCRIPTION

[0088] The present application will be further described by way of example with reference to the accompanying drawings.

[0089] Embodiment 1

[0090] As Figures 1 to 5As shown, the embodiment 1 provides an electric vehicle 1000, and the electric vehicle 1000 comprises a hanging seat 1. The hanging seat 1 is used for locking with a hanging piece 2 to install a battery pack 61 on the electric vehicle 1000. The hanging seat 1 comprises a floating mechanism 11, at least two ends of the floating mechanism 11 are movably connected to the electric vehicle 1000. The floating mechanism 11 has a locking groove 111, and the locking groove 111 is connected with a threaded part 22 on the hanging piece 2. Specifically, the hanging piece 2 is connected with the hanging seat 1 by rotating, which does not need a large gap between the hanging piece 2 and the hanging seat 1, so that the hanging piece 2 can be stably connected with the hanging seat 1, and the stability of the battery pack 61 is improved. When the battery pack 61 is connected with the chassis of the electric vehicle 1000, the floating mechanism 11 can be self-adjusted, so that the threaded part 22 can be connected with the locking groove 111, thereby realizing the connection of the hanging piece 2 with the hanging seat 1. In order to realize the stable connection of the battery pack 61 with the electric vehicle 1000, a plurality of hanging pieces 2 are arranged on the battery pack 61, and a floating mechanism 11 corresponding to each hanging piece 2 is arranged on the chassis of the electric vehicle 1000. When each floating mechanism 11 is connected with each hanging piece 2, each floating mechanism 11 can be connected with each hanging piece 2 through self-adjustment, thereby reducing the installation accuracy of each floating mechanism 11. By using the above structure, the overall manufacturing accuracy of the chassis and the manufacturing accuracy of the battery pack 61 can be reduced, and the positioning accuracy requirement is also reduced during the replacement of the battery pack 61, thereby simplifying the production process and improving the production efficiency.

[0091] In specific use, in order to stably movably connect the floating mechanism 11 with the electric vehicle 1000, it is preferred that the floating mechanism 11 is movably connected with the electric vehicle 1000 at least at two symmetrical ends.

[0092] In order to realize that at least two ends of the floating mechanism 11 are movably connected with the electric vehicle 1000, the embodiment can be connected with the electric vehicle 1000 through the elastic member 113. By using the above structure, the elastic member 113 is used to movably connect the floating mechanism 11 with the electric vehicle 1000, so that when the threaded part 22 is connected with the locking groove 111, the elastic member 113 can store energy, and when the threaded part 22 is removed from the locking groove 111, the elastic member 113 can be used to reset the floating mechanism 11, and in the process of resetting, the elastic member 113 can also provide buffer for the floating mechanism 11, preventing the floating mechanism 11 from colliding with the electric vehicle 1000 and affecting the service life of the two. By connecting the floating mechanism 11 with the electric vehicle 1000 through the elastic member 113, the floating mechanism 11 can realize multi-degree-of-freedom movement, and the movable range of the floating mechanism 11 is improved.

[0093] The elastic member 113 is a spring, which has the advantages of convenient installation, long service life and low cost. In other embodiments, the elastic member 113 can be in the form of a disc spring, and the type of the elastic member 113 is not limited herein.

[0094] The floating mechanism 11 comprises a floating body 114, and a plurality of elastic members 113 are respectively connected to the periphery of the floating body 114. With the above structure, the stability of the floating of the floating body 114 is improved.

[0095] In specific use, the two ends of the elastic member 113 are respectively connected to the fixed mechanism 12 and the floating body 114, and the elastic member 113 can be connected to the electric vehicle 1000 through the fixed mechanism 12.

[0096] The floating mechanism 11 further comprises a protruding portion 112 extending outward from the floating body 114, and the locking groove 111 is arranged in the floating body 114 and the protruding portion 112. Specifically, by arranging the locking groove 111 in the floating body 114 and the protruding portion 112, the depth of the locking groove 111 is improved, and thus the connection area of the locking groove 111 and the threaded portion 22 is improved when they are matched, so as to realize the stable connection of the locking groove 111 and the threaded portion 22. The protruding portion 112 extends outward from the floating body 114, so that there is no gap between the lower end of the floating mechanism 11 and the fixed mechanism 12 to prevent the protruding portion 112 and the fixed mechanism 12 from colliding, thereby improving the compactness of the installation structure of the floating mechanism 11.

[0097] The floating mechanism 11 further comprises a guide hole 115, and the arrangement position of the guide hole 115 can have several embodiments. In a first embodiment, the guide hole 115 is located at the top of the locking groove 111, which can reduce the interference of the hanging seat 1 on the movement of the threaded portion 22 during the matching process of the locking groove 111 and the threaded portion 22. During the rotation process, as the threaded portion 22 moves upward, the upper end of the threaded portion 22 can extend out of the locking groove 111 from the guide hole 115, thereby preventing the threaded portion 22 and the locking groove 111 from being damaged due to extrusion, and improving the service life of the threaded portion 22 and the locking groove 111. In a second embodiment, the guide hole 115 is located at the bottom of the locking groove 111, which can make the threaded portion 22 extend into the locking groove 111 from the guide hole 115 to match with the locking groove 111, thereby facilitating the connection of the threaded portion 22 and the locking groove 111. In a third embodiment, the guide hole 115 is arranged at the top and the bottom of the locking groove 111. Preferably, the guide hole 115 is arranged at the top and the bottom of the locking groove 111. With the above arrangement, the connection of the threaded portion 22 and the locking groove 111 is facilitated, and the interference of the hanging seat 1 on the movement of the threaded portion 22 is reduced, thereby preventing the threaded portion 22 and the locking groove 111 from being damaged due to extrusion, and improving the service life of the threaded portion 22 and the locking groove 111.

[0098] The guide hole 115 has a first guide sliding surface 116. With the above structure, in the first embodiment, the first guide sliding surface 116 can facilitate the threaded portion 22 to extend into the locking groove 111 from the guide hole 115, thereby reducing the resistance of the threaded portion 22 to enter the guide hole 115; in the second embodiment, the first guide sliding surface 116 can facilitate the threaded portion 22 to extend out of the locking groove 111 from the guide hole 115, thereby reducing the resistance of the threaded portion 22 to extend out of the guide hole 115; in the third embodiment, the first guide sliding surface 116 can facilitate the threaded portion 22 to extend into the locking groove 111 from the guide hole 115 and extend out of the locking groove 111 from the guide hole 115.

[0099] The hanging seat 1 further comprises a fixing mechanism 12, and the floating mechanism 11 is floatingly connected to the fixing mechanism 12. The fixing mechanism 12 is fixedly connected to the electric vehicle 1000. With the above structure, the floating mechanism 11 is floatingly connected to the fixing mechanism 12, so that the floating mechanism 11 can be protected by the fixing mechanism 12, thereby reducing damage to the floating mechanism 11 from the outside and prolonging the service life of the floating mechanism 11. In addition, the floating mechanism 11 is connected to the electric vehicle 1000 through the fixing mechanism 12, thereby increasing the contact area between the hanging seat 1 and the electric vehicle 1000 and improving the stability of the connection between the hanging seat 1 and the electric vehicle 1000.

[0100] The fixing mechanism 12 has a floating cavity 125, and the floating mechanism 11 is located in the floating cavity 125 and movably connected to the fixing mechanism 12. With the above structure, while the floating mechanism 11 is protected by the fixing mechanism 12, the floating mechanism 11 is provided with a movable space by the floating cavity 125, thereby preventing collision between the fixing mechanism 12 and the floating mechanism 11 and prolonging the service life of both.

[0101] The fixing mechanism 12 has a first through hole 126 at the bottom, and the first through hole 126 is in communication with the floating cavity 125. The first through hole 126 is used to avoid the hanging part 2. The above description can also be described in another way: that is, under the action of an external force, the upper end of the hanging part 2 located on the battery pack 61 can first extend into the floating cavity 125 through the first through hole 126, and then the hanging part 2 extending into the floating cavity 125 continues to move into the locking groove 111 and cooperates with the locking groove 111. With the above structure, the hanging part 2 can be conveniently extended into the floating cavity 125.

[0102] In specific use, the diameter of the first through hole 126 can be greater than the diameter of the guide hole 115 at the lower end of the floating cavity 125, so that the guide portion 21 and the threaded portion 22 can be conveniently extended.

[0103] The top of the fixing mechanism 12 has a second through hole 124, which is communicated with the first through hole 126 through a floating cavity 125, and the second through hole 124 is used to avoid the hanging piece 2. The above description can be expressed in another way: when the threaded part 22 in the hanging piece 2 cooperates with the locking groove 111, the hanging piece 2 will move upward, at this time, the upper end of the hanging piece 2 can extend out of the hanging seat 1 from the second through hole 124, thereby preventing damage between the hanging piece 2 and the hanging seat 1 due to extrusion, improving the service life of the hanging piece 2 and the hanging seat 1, and the upper end of the hanging piece 2 can extend out of the hanging seat 1 from the second through hole 124, which can also make the threaded part 22 and the locking groove 111 can realize sufficient contact, improve the connection area of the two, and then improve the stability of the connection between the hanging piece 2 and the hanging seat 1, so that the battery pack 61 can be stably hung on the electric vehicle 1000.

[0104] In specific use, the protruding part 112 can extend out of the limiting plate 123 from the second through hole 124. With the above structure, the gap between the limiting plate 123 and the floating body 114 can be reduced, thereby improving the compactness of the structure of the hanging seat 1. Preferably, the diameter of the second through hole 124 is greater than the diameter of the protruding part 112, thereby preventing the second through hole 124 from affecting the movement of the protruding part 112.

[0105] When the hanging seat 1 cooperates with the hanging piece 2, the locking groove 111, the first through hole 126 and the second through hole 124 are all penetrated by the hanging piece 2. With the above structure, the locking groove 111 and the threaded part 22 can be stably connected, thereby realizing stable cooperation between the hanging seat 1 and the hanging piece 2.

[0106] The fixing mechanism 12 comprises a fixing plate 122, a limiting plate 123 and two connecting plates 121, the two connecting plates 121 are symmetrically arranged at two ends of the fixing plate 122, the limiting plate 123 is connected to the top of the connecting plate 121 and is used for limiting the displacement of the floating mechanism 11 in the vertical direction, and the fixing plate 122, the connecting plate 121 and the limiting plate 123 jointly enclose a floating cavity 125. The above can also be described as: the floating cavity 125 providing a movable space for the floating mechanism 11 is realized by the joint enclosure of the fixing plate 122, the limiting plate 123 and the two connecting plates 121. The above structure has the characteristics of convenient processing, simple structure and low cost. The fixing plate 122 is connected with the electric vehicle 1000 through bolts, thereby realizing the connection between the fixing mechanism 12 and the electric vehicle 1000. Since the fixing plate 122 increases the connection area between the hanging seat 1 and the electric vehicle 1000, the stability of the connection can be improved. In the process that the hanging piece 2 extends into the locking groove 111, the floating body 114 will produce a large upward displacement, at this time, the limiting plate 123 can prevent the floating body 114 from producing a large upward displacement and causing damage to the elastic element 113, thereby improving the service life of the floating mechanism 11. The limiting plate 123 and the fixing plate 122 can be connected through the connecting plate 121, and the connecting plate 121 can also limit the horizontal displacement of the floating body 114, preventing the floating body 114 from producing a large displacement and causing damage to the elastic element 113. By adopting the above structure, while providing a movable space for the floating mechanism 11, the floating body 114 can also be prevented from producing an excessive displacement, thereby preventing damage to the floating body 114 itself and the elastic element 113, and improving the service life of the floating mechanism 11.

[0107] The first through hole 126 is arranged on the fixing plate 122, and by adopting the above structure, the fixing plate 122 is connected with the electric vehicle 1000, and the first through hole 126 is arranged on the fixing plate 122, thereby facilitating the extension of the hanging piece 2 into the locking groove 111 and the cooperation with the locking groove 111. The second through hole 124 is arranged on the limiting plate 123, and by adopting the above structure, the limiting plate 123 limits the displacement of the floating mechanism 11, and the second through hole 124 is arranged on the limiting plate 123, thereby facilitating the extension of the hanging piece 2 out of the locking groove 111, preventing the extrusion between the threaded portion 22 and the limiting plate 123 and causing damage, and improving the service life of the threaded portion 22 and the limiting plate 123.

[0108] The fixing plate 122 has a plurality of mounting holes 1221 arranged at each corner of the fixing plate 122, for connecting the fixing mechanism 12 to the electric vehicle 1000. With the above structure, the fixing plate 122 is connected to the electric vehicle 1000 through the mounting holes 1221, and the plurality of mounting holes 1221 are arranged at each corner of the fixing plate 122, improving the connection stability of the fixing plate 122 and the electric vehicle 1000.

[0109] The number of the limiting plates 123 is two, and the two limiting plates 123 are respectively connected to the two connecting plates 121. The two limiting plates 123 each have a slot 1231, and the two slots 1231 correspond to each other and form the second through hole 124. With the above structure, the connection accuracy of the limiting plate 123 and the connecting plate 121 is reduced, and the connection reliability of each limiting plate 123 and each connecting plate 121 is ensured. In other embodiments, the number of the limiting plate 123 can also be one, and the limiting plate 123 is connected to the two connecting plates 121 at both ends, and the second through hole 124 is formed in the middle of the limiting plate 123.

[0110] In specific use, the fixing plate 122, the connecting plate 121 and the limiting plate 123 are all plate-shaped structures, and the fixing mechanism 12 can be processed by a bending process. The fixing plate 122, the connecting plate 121 and the limiting plate 123 are integrally formed after the bending process, having the characteristics of convenient processing, material saving and low use cost. Of course, the fixing plate 122, the connecting plate 121 and the limiting plate 123 can also be separately arranged, and the fixing plate 122, the connecting plate 121 and the limiting plate 123 are connected and enclosed to form the floating mechanism 11 by welding or the like.

[0111] The connecting plate 121 has a connecting hole 1211, and the elastic member 113 is connected to the connecting hole 1211. With the above structure, the elastic member 113 is connected through the connecting hole 1211, having the characteristics of simple connection method and convenient installation, and the connecting hole 1211 is arranged on the connecting plate 121, so that the floating body 114 has a gap with the fixing plate 122 and the limiting plate 123, preventing impact between the floating body 114 and the fixing plate 122 and the limiting plate 123, and improving the service life of the floating body 114, the fixing plate 122 and the limiting plate 123. The size of the gap between the floating body 114 and the fixing plate 122 and the limiting plate 123 can be adjusted by adjusting the height of the connecting hole 1211.

[0112] The hanging member 2 has external threads, the locking slot 111 has internal threads, and the external threads are connected to the internal threads, so that the battery pack 61 is connected to the floating mechanism 11. With the above structure, the threaded connection has the characteristics of high connection repeatability, simple structure, convenient connection and low cost.

[0113] Example 2

[0114] like Figures 6 to 10 As shown, this embodiment provides a mounting device 100, which includes a mounting member 2 and a mounting base 1. The mounting member 2 is mounted on a battery pack 61, and the mounting base 1 is mounted on the chassis of an electric vehicle 1000. The mounting member 2 includes a guide portion 21 and a threaded portion 22, with the guide portion 21 located at the top of the threaded portion 22. During the connection between the mounting member 2 and the mounting base 1, the guide portion 21 first extends into the mounting base 1 to guide the threaded portion 22, and then the threaded portion 22 extends into the locking groove 111 to engage with it. Furthermore, the guide portion 21 facilitates the extension of the mounting member 2 from the mounting base 1, preventing compression between the mounting member 2 and the mounting base 1 and thus improving their service life.

[0115] The top end of the guide portion 21 has a second guide surface 211, which facilitates the guide portion 21 to extend into or out of the hook seat 1 and reduces the resistance between the guide portion 21 and the hook seat 1. Specifically, the guide portion 21 is frustum-shaped, and the second guide surface 211 is provided on the side wall of the frustum.

[0116] The guide part 21 and the threaded part 22 are integrally formed, which has the characteristics of simple structure and convenient processing. The threaded part 22 can move upward with the guide part 21 into the locking groove 111, and then the threaded part 22 and the locking groove 111 can be matched by external force, which has the characteristics of convenient operation.

[0117] The guide part 21 and the threaded part 22 are set separately, so that if one of the guide part 21 and the threaded part 22 is damaged, only the damaged guide part 21 and the threaded part 22 need to be replaced to restore normal use, thus reducing the cost of use.

[0118] With the guide part 21 and the threaded part 22 integrally formed as an example, the process of hanging the battery pack 61 on the electric vehicle 1000 is described. The first through hole 126 is provided on the fixed plate 122, the second through hole 124 is provided on the limiting plate 123, and the upper and lower ends of the locking groove 111 are both open to the guide hole 115. When the battery pack 61 is hung, the guide part 21 and the threaded part 22 will move upward under the action of external force. Since the guide part 21 is located at the upper end of the threaded part 22, during the hanging process, the guide part 21 enters the hanging seat 1 first. That is, under the action of the guide part 21, the axis of the first through hole 126 and the guide hole 115 located at the lower end of the locking groove 111 coincide. At this time, the guide part 21 passes through the first through hole 126 and the guide hole 115 located at the lower end of the locking groove 111 in turn and enters the locking groove 111. Under the action of the guide part 21, the threaded part 22 also passes through the first through hole 126 and the guide hole 115 located at the lower end of the locking groove 111 in turn and enters the locking groove 111. In order to enable the threaded part 22 and the locking groove 111 to fully cooperate, the hanging part 2 is rotated under the action of external force, so that the threaded part 22 cooperates with the locking groove 111 while the guide part 21 and the threaded part 22 continue to move upward. At this time, under the action of the guide part 21, the second through hole 124 and the guide hole 115 located on the axis of the locking groove 111 coincide, so the guide part 21 can pass through the guide hole 115 located at the upper end of the locking groove 111 and the second through hole 124 in turn and extend out of the hanging seat 1. Under the action of the guide part 21, part of the threaded part 22 may extend out of the hanging seat 1. The above-mentioned mode can realize the stable connection of the threaded part 22 and the locking groove 111.

[0119] The hanging device 100 comprises a mounting shell 4, a first engaging member 7 fixed in the mounting shell 4, and a second engaging member 8 connected with the hanging member 2, the second engaging member 8 being located in the mounting shell 4 and being movable in the mounting shell 4 for switching between a first state and a second state; in the first state, the first engaging member 7 and the second engaging member 8 are engaged; in the second state, the second engaging member 8 is disengaged from the first engaging member 7, and the second engaging member 8 drives the hanging member 2 to rotate. The above description can also be specifically described as follows: in the first state, since the first engaging member 7 is fixed in the mounting shell 4, and the first engaging member 7 and the second engaging member 8 are engaged, the second engaging member 8 can be limited by the first engaging member 7, thereby preventing the second engaging member 8 from rotating. That is, the rotation of the hanging member 2 is prevented by the second engaging member 8, so that the hanging member 2 is stably connected to the hanging seat 1. In the second state, under the action of an external force, the second engaging member 8 moves upward to disengage from the first engaging member 7, and without the constraint of the first engaging member 7, the second engaging member 8 can be driven to rotate by the action of the external force, so that the second engaging member 8 can drive the hanging member 2 to rotate, and finally the hanging part is connected to the hanging seat 1 after the rotation angle is realized. By adopting the above structure, the first state is a state in which the threaded part 22 is connected with the locking groove 111 in cooperation; and the second state is a state in which the threaded part 22 is not connected with the locking groove 111 in cooperation.

[0120] The second engaging member 8 comprises a matching portion 81, an elastic portion 82 and an engaging portion 83 arranged in sequence from top to bottom, the two ends of the elastic portion 82 abut with the matching portion 81 and the engaging portion 83 respectively, and the lower end of the hanging member 2 is connected with the matching portion 81; in the first state, the engaging portion 83 engages with the first engaging member 7, and the matching portion 81 is disengaged from the engaging portion 83; in the second state, the engaging portion 83 is disengaged from the first engaging member 7, and the matching portion 81 cooperates with the engaging portion 83 to realize the rotation of the engaging portion 83 driving the matching portion 81 and the hanging member 2. The above description can be specifically described as follows: in the first state, since the first engaging member 7 is fixed in the mounting shell 4, and the engaged engaging portion 83 cannot rotate under the limitation of the first engaging member 7, at this time, under the action of the elastic portion 82, the matching portion 81 is disengaged from the engaging portion 83. In this state, even if an external force is applied, the hanging member 2 cannot rotate, thereby realizing reliable hanging. In the second state, under the action of the external force, the engaging portion 83 moves upward, so that the engaging portion 83 is disengaged from the first engaging member 7, and the upward moving engaging portion 83 compresses the elastic portion 82 to realize the cooperation of the matching portion 81 and the engaging portion 83, and at the same time, under the driving of the guide portion 21, the threaded portion 22 enters the locking groove 111. Subsequently, under the driving of the external force, the engaging portion 83 rotates to drive the hanging member 2 to rotate by an angle, and then the threaded portion 22 is connected with the locking groove 111 in cooperation. Specifically, the mounting shell 4 can have a avoiding hole 5, and the unlocking device can contact the hanging member 2 through the avoiding hole 5. That is, in the second state, the unlocking device can first realize the upward movement of the engaging portion 83 to disengage from the first engaging member 7, and then the unlocking device drives the rotation of the matching portion 81 and the hanging member 2 through the engaging portion 83, and then the unlocking device realizes the connection of the threaded portion 22 and the locking groove 111. After hanging, the unlocking device is disengaged from the engaging portion 83, the engaging portion 83 moves downward under the action of the elastic portion 82, and the downward moving engaging portion 83 engages with the first engaging member 7, thereby realizing stable hanging. The avoiding hole 5 can be located at the bottom of the mounting shell 4, which facilitates the hanging and unloading of the battery pack 61.

[0121] Embodiment 3

[0122] As shown in Figures 11 to 15 An electric vehicle 1000, which is a commercial vehicle such as a heavy truck or a light truck. It includes a battery swap battery pack 6, and the battery swap battery pack 6 includes a battery pack 61 and the hanging device 100 in embodiment 2.

[0123] The battery pack 61 comprises a battery pack body 611 and a battery rack 612, the battery rack 612 is arranged along the outer surface of the battery pack body 611 in a circumferential direction, and the mounting shell 4 is connected with the battery pack body 611 and the battery rack 612 respectively. By adopting the above structure, the mounting shell 4 is connected with the battery pack body 611 and the battery rack 612 respectively, thereby improving the stability of the battery pack 61 hung on the chassis. That is, the hanging piece 2 located on the battery pack body 611 and the mounting shell 4 located on the battery rack 612 can both achieve the connection with the battery pack 6, thereby improving the stability of the battery pack 6 hung on the chassis.

[0124] The battery pack body 611 has a reinforcing beam, the mounting shell 4 penetrates the reinforcing beam and is connected with the upper surface of the reinforcing beam through the fixing base 3 located on the side wall of the mounting shell 4, the bottom of the hanging piece 2 is connected with the mounting shell 4, the hanging piece 2 penetrates the reinforcing beam and the battery pack body 611 and protrudes from the upper surface of the battery pack body 611. By adopting the above structure, the connection between the hanging piece 2 and the battery pack body 611 is achieved by the connection between the fixing base 3 and the reinforcing beam in the battery pack body 611. The part of the hanging piece 2 protruding from the upper surface of the battery pack body 611 can achieve the hanging with the hanging seat 1, thereby achieving the hanging of the battery pack body 611 on the chassis of the electric vehicle 1000.

[0125] The hanging assembly further comprises a sealing piece 62, the sealing piece 62 is connected to the end of the mounting shell 4 away from the reinforcing beam, for sealing the battery pack body 611 and the mounting shell 4, one end of the sealing piece 62 extends into the mounting shell 4 and is attached to the inner wall of the mounting shell 4, and the other end of the sealing piece 62 is connected to the upper surface of the battery pack body 611. By adopting the above structure, the gap between the hanging piece 2 and the mounting shell 4 is sealed by the sealing piece 62, thereby preventing external objects from entering the battery pack 61 from the mounting shell 4, which affects the service life of the battery pack 61.

[0126] In specific use, the material of the sealing piece 62 can be rubber material. At the same time, the sealing piece 62 is made of rubber material, which can also reduce the wear of the hanging piece 2 caused by the friction between the hanging piece 2 and the sealing piece 62 during rotation.

[0127] The mounting shell 4 penetrates the battery rack 612 and is connected with the lower surface of the battery rack 612 through the fixing base 3 at the bottom of the mounting shell 4, and the hanging component 2 penetrates the battery rack 612 and protrudes from the upper surface of the battery rack 612. When the mounting shell 4 and the fixing base 3 are subjected to a pulling force, the fixing base 3 is subjected to an upward pulling force, and the pressure of the battery rack 612 acting on the fixing base 3 is downward, which can offset the upward pulling force of the fixing base 3, thereby preventing the fixing base 3 from being deformed too much, affecting the service life, and in the above structure, the bolts can only be used to fix the fixing base 3 and the mounting shell 4 and are not subjected to a pulling force, thereby preventing the bolts from being damaged and loosened, thereby improving the reliability of the connection between the battery pack 61 and the chassis of the electric vehicle 1000.

[0128] By using the technical solutions in the above embodiments, the height space below the chassis of the vehicle is fully utilized. When the battery swapping device dismounts the battery swapping pack, the empty battery swapping device can directly enter the space below the battery swapping pack without interfering with the bottom of the electric vehicle. When the battery swapping device mounts the battery swapping pack, the battery swapping device carrying the battery swapping pack can also directly enter the space below the chassis of the vehicle for battery swapping without interfering with the bottom of the electric vehicle. In the whole process, the vehicle body does not need to be lifted, and a sunken space or a pit does not need to be set up for the battery swapping device to enter and exit, which reduces the construction cost, time and difficulty of the battery swapping station, reduces the requirements for the construction site, and improves the efficiency of battery swapping.

[0129] Although the specific embodiments of the present application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present application, and these changes and modifications all fall within the protection scope of the present application.

Claims

1. A hanger seat, characterized in that, The hanging seat is used for locking with the hanging piece to install the battery pack on the electric vehicle, and the hanging seat comprises: A floating mechanism, at least two ends of the floating mechanism are movably connected to the electric vehicle; the floating mechanism has a locking groove matched with a threaded part on the hanging piece; The floating mechanism is connected to the electric vehicle through elastic members; The floating mechanism comprises a floating body, and a plurality of elastic members are respectively connected around the floating body; The floating mechanism further has a protruding part extending outward from the floating body, and the locking groove is arranged in the floating body and the protruding part; The hanging piece has an external thread, the locking groove has an internal thread, and the external thread is connected to the internal thread to connect the battery pack to the floating mechanism.

2. The hitch socket of claim 1, wherein, The elastic member is a spring.

3. The hitch socket of claim 1, wherein, The floating mechanism further has a guide hole at the top and / or bottom of the locking groove.

4. The hitch socket of claim 3, wherein, The guide hole has a first guide sliding surface.

5. The hitch socket of claim 1, wherein, The hanging seat further comprises a fixing mechanism, the floating mechanism is movably connected in the fixing mechanism, and the fixing mechanism is fixedly connected to the electric vehicle.

6. The hitch socket of claim 5, wherein, The fixing mechanism has a floating cavity, the floating mechanism is located in the floating cavity and movably connected to the fixing mechanism.

7. The hitch socket of claim 6, wherein, The bottom of the fixing mechanism has a first through hole in communication with the floating cavity, and the first through hole is used for avoiding the hanging piece.

8. The hitch socket of claim 7, wherein, The top of the fixing mechanism has a second through hole in communication with the first through hole through the floating cavity, and the second through hole is used for avoiding the hanging piece.

9. The hitch socket of claim 8, wherein, When the hanging seat is matched with the hanging piece, the locking groove, the first through hole and the second through hole are all penetrated by the hanging piece.

10. The hitch socket of claim 8, wherein, The fixing mechanism comprises a fixing plate, a limiting plate and two connecting plates, the two connecting plates are symmetrically arranged at two ends of the fixing plate, the limiting plate is connected to the top of the connecting plate and is used for limiting the displacement of the floating mechanism in the vertical direction, and the fixing plate, the connecting plate and the limiting plate enclose the floating cavity.

11. The hitch socket of claim 10, wherein, The first through hole is arranged on the fixing plate; and / or, the second through hole is arranged on the limiting plate.

12. The hitch socket of claim 10, wherein, The fixing plate has a plurality of mounting holes arranged at each corner of the fixing plate, and the mounting holes are used for connecting the fixing mechanism to the electric vehicle.

13. The hitch socket of claim 10, wherein, The number of the limiting plates is two, the two limiting plates are respectively connected to the two connecting plates, and the two limiting plates both have grooves corresponding to form the second through hole.

14. The hitch socket of claim 10, wherein, The connecting plate has a connecting hole, and the elastic member is connected to the connecting hole.

15. A hitching device, characterized in that The hanging seat comprises the hanging piece and the hanging seat according to any one of claims 1-14.

16. The hitch assembly of claim 15, wherein, The hanging piece comprises a guide part and a threaded part, and the guide part is arranged at the top end of the threaded part.

17. The hitch assembly of claim 16, wherein, The top end of the guide part has a second guide sliding surface.

18. The hitch assembly of claim 16, wherein, The guide part and the threaded part are integrally formed.

19. The hitch assembly of claim 16, wherein, The guide part and the threaded part are separately arranged.

20. The hitch assembly of claim 15, wherein, The hanging device further comprises a mounting shell, a first engaging member fixed in the mounting shell, and a second engaging member connected with the hanging member and movable in the mounting shell for switching between a first state and a second state; In the first state, the first engaging member and the second engaging member are engaged; In the second state, the second engaging member is disengaged from the first engaging member, and the second engaging member drives the hanging member to rotate.

21. The hitch assembly of claim 20, wherein, The second engaging member comprises a matching portion, an elastic portion, and an engaging portion arranged in sequence from top to bottom, the two ends of the elastic portion are respectively in abutment with the matching portion and the engaging portion, and the lower end of the hanging member is connected with the matching portion; In the first state, the engaging portion and the first engaging member are engaged, and the matching portion is disengaged from the engaging portion; In the second state, the engaging portion is disengaged from the first engaging member, and the matching portion cooperates with the engaging portion to realize that the engaging portion drives the matching portion and the hanging member to rotate.

22. A battery pack for battery swap, characterized in that, The battery replacement package comprises a battery package and the hanging device according to any one of claims 15-21.

23. The battery pack of claim 22, wherein, The battery package comprises a battery package body and a battery rack arranged circumferentially along the outer surface of the battery package body, and the hanging device further comprises a mounting shell, and the hanging member is connected with the battery package body and the battery rack through the mounting shell. 24.The battery replacement pack of claim 23, wherein, The battery package body has a reinforcing beam, the mounting shell penetrates the reinforcing beam and is connected with the upper surface of the reinforcing beam through a fixing base on the side wall of the mounting shell, the bottom of the hanging member is connected with the mounting shell, and the hanging member penetrates the reinforcing beam and the battery package body and protrudes from the upper surface of the battery package body.

25. The battery pack of claim 24, wherein, The hanging device further comprises a sealing member connected to the end of the mounting shell away from the reinforcing beam for sealing the battery package body and the mounting shell, one end of the sealing member extends into the mounting shell and is in abutment with the inner wall of the mounting shell, and the other end of the sealing member is connected with the upper surface of the battery package body. 26.The battery swap pack of claim 23, wherein, The mounting shell penetrates the battery rack and is connected with the lower surface of the battery rack through a fixing base on the bottom of the mounting shell, and the hanging member penetrates the battery rack and protrudes from the upper surface of the battery rack.

27. An electric vehicle, characterized by The electric vehicle comprises the hanging seat according to any one of claims 1-14, or the electric vehicle comprises the battery replacement package according to any one of claims 22-26.

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