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

Abstract

The invention provides a hitching seat, a hitching device, a battery pack and an electric automobile, the hitching seat is used for being locked with a hitching piece so as to mount the battery pack on the electric automobile, the hitching seat comprises a floating mechanism, at least two ends of the floating mechanism are movably connected to the electric automobile; the floating mechanism is provided with a locking groove, and the locking groove is connected with the threaded part on the hanging piece in a matched mode. A plurality of hanging pieces are arranged on the battery pack, a plurality of floating mechanisms are arranged on the chassis, the hanging pieces and the floating mechanisms are connected in a one-to-one correspondence mode, and all the hanging pieces and the floating mechanisms can be achieved through self-adjustment of the floating mechanisms. By adopting the structural form, the overall manufacturing precision of the chassis and the manufacturing precision of the battery pack can be reduced, and the requirement on the positioning precision of the battery pack can be reduced in the process of replacing the battery pack, so that the production process is simplified, and the production efficiency is improved.

Description

[0001] This application is a division of a Chinese invention patent with an application date of December 31, 2021, application number 2021116737836, and name “hook seat, hook device, battery replacement battery pack and electric vehicle”. Technical Field

[0002] The invention relates to a hooking seat, a hooking device, a battery replacement pack and an electric vehicle. Background Art

[0003] The battery packs of existing electric vehicles are generally divided into fixed and replaceable types. Among them, fixed battery packs are 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 electric vehicle adapter plate through a movable installation method. The battery pack can be removed for separate replacement or charging operations. After the replaced battery pack is charged, it can be installed on the vehicle.

[0004] In the prior art, battery pack replacement methods include manual, automatic and other means. Regardless of which method is used, when the battery is installed on the electric vehicle, the battery pack needs to be locked on the electric vehicle adapter base. Currently, multiple lock shafts are set on the battery pack and hung in the lock groove of the lock base on the base plate to achieve the connection between the battery pack and the electric vehicle. However, the above method has high requirements for the overall manufacturing accuracy of the chassis and the manufacturing accuracy of the battery pack, and in the process of replacing the battery pack, the positioning accuracy requirements will also be high.

[0005] The battery pack in the prior art is generally locked to the bottom of the electric vehicle by a buckle. During the installation of the battery pack, this locking method requires the battery swap equipment to move the battery pack to a certain height in the vertical direction and then move the battery pack horizontally to the locking position. On the one hand, it leads to a complex structure of the battery swap equipment and relatively high electrical control requirements. On the other hand, it is necessary to reserve space for the horizontal movement of the battery pack at the bottom of the electric vehicle, which makes the movement of the battery pack easily restricted by the space at the bottom of the electric vehicle, resulting in high difficulty in locking control of the battery pack and low battery swap efficiency. Summary of the invention

[0006] The technical problem to be solved by the present invention is to overcome the defects of the prior art that the battery pack locking control is difficult, the battery replacement efficiency is low and it is easily limited by the bottom space of the electric vehicle, and to provide a mounting seat, a mounting device, a battery replacement battery pack and an electric vehicle.

[0007] The present invention solves the above technical problems through the following technical solutions:

[0008] A mounting base is used to be locked with a mounting member to install a battery pack on an electric vehicle, the mounting base comprises: a floating mechanism, at least two ends of the floating mechanism can be movably connected to the electric vehicle;

[0009] The mounting seat further comprises a fixing mechanism, the floating mechanism is floatingly connected inside the fixing mechanism, and the fixing mechanism is fixedly connected to the electric vehicle;

[0010] The fixing mechanism has a floating cavity therein, and the floating mechanism is located in the floating cavity and is movably connected to the fixing mechanism;

[0011] The fixing mechanism includes a fixing plate, a limiting plate and two connecting plates. The two connecting plates are symmetrically arranged at both ends of the fixing plate. The limiting plate is connected to the top of the connecting plate and is used to limit the displacement of the floating mechanism in the vertical direction. The fixing plate, the connecting plate and the limiting plate together enclose the floating cavity.

[0012] In this solution, the hooking member is connected to the hooking seat by rotating. The above method does not require a large gap between the hooking member and the hooking seat, so that the hooking member can be stably connected to the hooking seat, thereby improving the stability of the battery pack. At the same time, at least two ends of the floating mechanism can be movably connected to the electric vehicle, so that in the process of hanging the battery pack, the floating mechanism can be self-adjusted, so that the threaded part can be matched with the locking groove. There are multiple hooking members on the battery pack, and multiple floating mechanisms on the electric vehicle. The hooking members and the floating mechanisms are connected one by one, and can be achieved through the self-adjustment of each floating mechanism, reducing the overall manufacturing accuracy of the chassis and the manufacturing accuracy of the battery pack. In the process of replacing the battery pack, the positioning accuracy requirements will also be reduced, thereby simplifying the production process and improving production efficiency. The floating mechanism is floatingly connected in the fixed mechanism, and the floating mechanism can be protected by the mechanism, reducing the damage to the floating mechanism by the outside world and increasing the service life of the floating mechanism; furthermore, the floating mechanism is connected to the electric vehicle through the fixed mechanism, increasing the contact area between the hooking seat and the electric vehicle, and improving the stability of the connection between the hooking seat and the electric vehicle. While the floating mechanism is protected by the fixing mechanism, the floating cavity provides a movable space for the floating mechanism, preventing collision between the fixing mechanism and the floating mechanism, thereby increasing the service life of both. The floating cavity enclosed by the fixing plate, the limiting plate and the two connecting plates can provide the floating body with the space required for movement, and the above-mentioned structural form has the characteristics of convenient processing, simple structure and low cost. Among them, the fixing plate can increase the connection area between the mounting seat and the electric vehicle, and improve the stability of the connection; in the process of the mounting part extending into the locking groove, a large upward displacement will be generated; at this time, the limiting plate can be used to prevent the floating body from having a large upward displacement and causing damage to the elastic part, thereby increasing the service life of the floating mechanism; while realizing the connection between the fixing plate and the limiting plate, the connecting plate can also limit the horizontal displacement of the floating body, preventing the floating body from having a large displacement and causing damage to the elastic part. The above-mentioned structural form can increase the service life of the floating mechanism.

[0013] Preferably, the floating mechanism has a locking groove, and the locking groove is cooperatively connected with the threaded portion on the hanging member.

[0014] Preferably, the floating mechanism is connected to the electric vehicle via an elastic member.

[0015] In this solution, the above-mentioned structural form is adopted, and the floating mechanism is movably connected to the electric vehicle by using an elastic member, so that when the threaded part is connected to the locking groove, energy can be stored by the elastic member, and when the threaded part is removed from the locking groove, the floating mechanism can be returned to its original position by using the energy stored in the elastic member, and in the process of returning to its original position, the elastic member can also provide a buffer for the floating mechanism to prevent the floating mechanism from colliding with the electric vehicle and affecting the service life of both. The floating mechanism is connected to the electric vehicle through the elastic member, so that the floating mechanism can realize multi-degree-of-freedom activities and improve the range of activities of the floating mechanism.

[0016] Preferably, the elastic member is a spring.

[0017] In this solution, the above structural form is adopted, which has the characteristics of convenient installation, long service life and low cost.

[0018] Preferably, the floating mechanism comprises a floating body, and the plurality of elastic members are respectively connected around the floating body.

[0019] In this solution, the above-mentioned structural form is adopted, and the elastic member is connected to the four sides of the floating body, thereby improving the floating stability of the floating body.

[0020] Preferably, the floating mechanism further has a protrusion, which extends outward from the floating body, and the floating mechanism has a locking groove, which is arranged in the floating body and the protrusion.

[0021] In the present scheme, the above-mentioned structural form is adopted, and the depth of the locking groove is increased by arranging the locking groove in the floating mechanism and the protruding portion, so that when the locking groove and the threaded portion cooperate, the connection area between the two is increased, thereby achieving a stable connection between the locking groove and the threaded portion; and the protruding portion extends outward from the floating body, so that a large gap is not required between the floating mechanism and the fixed mechanism to prevent possible collision between the protruding portion and the floating mechanism, thereby improving the compactness of the anti-floating mechanism installation structure.

[0022] Preferably, the floating mechanism has a locking groove, and the floating mechanism also has a guide hole, and the guide hole is located at the top and / or bottom of the locking groove.

[0023] In this solution, the above-mentioned structural form is adopted, and the guide hole at the bottom of the locking groove can make the threaded part extend from the guide hole into the locking groove and cooperate with the locking groove, thereby facilitating the connection between the threaded part and the locking groove; through the guide hole at the top of the locking groove, the interference of the mounting seat on the movement of the threaded part can be reduced during the cooperation between the locking groove and the threaded part. During the rotation process, as the threaded part moves upward, the upper end of the threaded part can extend from the guide hole to the locking groove, thereby preventing the threaded part and the mounting seat from being squeezed and damaged, thereby increasing the service life of the threaded part and the locking groove.

[0024] Preferably, the guide hole has a first guide sliding surface.

[0025] In the present embodiment, the above-mentioned structural form is adopted, and the first guide sliding surface facilitates the threaded part to extend from the guide hole into the locking groove, which has the characteristic of small resistance; and / or, the first guide sliding surface facilitates the threaded hole to extend from the guide hole to the locking groove, which has the characteristic of small resistance.

[0026] Preferably, the fixing mechanism has a first through hole at the bottom, the first through hole is communicated with the floating cavity, and the first through hole is used to avoid the hanging member.

[0027] In this solution, the hanging part can first extend into the floating cavity through the first through hole, and then the hanging part extending into the floating cavity is extended into the locking groove to cooperate with the locking groove. The above structure facilitates the hanging part to extend into the floating cavity.

[0028] Preferably, the top of the fixing mechanism has a second through hole, the second through hole is connected with the first through hole through the floating cavity, and the second through hole is used to avoid the hanging member.

[0029] In this solution, the above-mentioned structural form can reduce the interference of the hanging seat on the movement of the hanging member during the cooperation between the locking groove and the hanging member. That is, during the rotation process, as the hanging member moves upward, the upper end of the hanging member can extend out of the hanging seat from the second through hole, thereby preventing the hanging member and the hanging seat from being squeezed and damaged, thereby increasing the service life of the hanging member and the hanging seat.

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

[0031] In this solution, the above-mentioned structural form is adopted to achieve stable connection between the locking groove and the threaded portion, thereby achieving stable cooperation between the hanging seat and the hanging member.

[0032] Preferably, the first through hole is provided on the fixing plate;

[0033] And / or, the second through hole is arranged on the limiting plate.

[0034] In the present solution, the above-mentioned structural form is adopted, so that the first through hole is set on the fixing plate while the fixing plate is connected to the electric vehicle, which facilitates the hanging part to extend into the locking groove and cooperate with the locking groove; and / or, the second through hole is set on the limiting plate while the limiting plate limits the displacement of the floating mechanism, which facilitates the hanging part to extend out of the locking groove, prevents the threaded part and the limiting plate from being squeezed and damaged, and improves the service life of the threaded part and the limiting plate.

[0035] Preferably, the fixing plate has a plurality of mounting holes, and the plurality of mounting holes are arranged at each corner of the fixing plate, for connecting the fixing mechanism to the electric vehicle.

[0036] In this solution, the above-mentioned structural form is adopted, the fixing plate is connected to the electric vehicle through the mounting holes, and multiple mounting holes are arranged at each corner of the fixing plate, thereby improving the connection stability between the fixing plate and the electric vehicle.

[0037] Preferably, there are two limit plates, the two limit plates are respectively connected to the two connecting plates, the two limit plates are provided with grooves, and the two grooves correspond to each other and form the second through hole.

[0038] In this solution, the above-mentioned structural form is adopted to ensure that the connection between each limiting plate and each connecting plate is more reliable.

[0039] Preferably, the connecting plate has a connecting hole, and the elastic member is connected to the connecting hole.

[0040] In the present scheme, the above-mentioned structural form is adopted, and it is connected with the elastic member through the connecting hole, which has the characteristics of simple connection method and convenient installation. The connecting hole is opened on the connecting plate, so that there can be a gap between the floating body and the fixed plate and the limit plate, thereby preventing the floating body from colliding with the fixed plate and the limit plate, and improving the service life of the floating body, the fixed plate and the limit plate.

[0041] Preferably, the hanging member has an external thread, the locking groove has an internal thread, and the external thread is connected to the internal thread so that the battery pack is connected to the floating mechanism.

[0042] In this solution, the above-mentioned structural form is adopted, which has the characteristics of high connection repeatability, simple structure, convenient connection and low cost.

[0043] A hooking device comprises a hooking member and the hooking seat as described above.

[0044] In this solution, the above-mentioned structural form is adopted, and the hanging parts and hanging seats are applied to the hanging device, which can reduce the overall manufacturing accuracy of the chassis and the manufacturing accuracy of the battery pack, and during the process of replacing the battery pack, the positioning accuracy requirements will also be reduced, thereby simplifying the production process and improving production efficiency.

[0045] Preferably, the hanging member includes a guide portion and a threaded portion, and the guide portion is arranged at the top end of the threaded portion.

[0046] In this solution, the above-mentioned structural form is adopted. During the process of connecting the hanging member and the hanging seat, the guide portion first extends into the hanging seat to guide the threaded portion; then, the threaded portion extends into the locking groove to cooperate with the locking groove;

[0047] And / or, through the guidance of the guide part, the hanging member can be easily extended out of the hanging seat, thereby preventing the hanging member and the hanging seat from being squeezed and causing damage to both, thereby increasing the service life of the hanging member and the hanging seat.

[0048] Preferably, the top end of the guide portion has a second guide sliding surface.

[0049] In this solution, the above-mentioned structural form is adopted to facilitate the guide part to extend into or out of the hanging seat, and has the characteristic of small resistance.

[0050] Preferably, the guide portion and the threaded portion are integrally formed.

[0051] In this solution, the above-mentioned structural form is adopted, which has the characteristics of simple structure and easy processing, and the threaded part can move up to the locking groove following the guide part, and then the threaded part and the locking groove can be matched by external force, which has the characteristics of easy operation.

[0052] Preferably, the guide portion and the threaded portion are separately provided.

[0053] In this solution, the above-mentioned structural form is adopted. If one of the guide part and the threaded part is damaged, only the damaged guide part and the threaded part need to be replaced for normal use, thereby reducing the cost of use.

[0054] Preferably, the hanging device also includes 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 to the hanging member, the second engaging member is located in the mounting shell and can move 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.

[0055] In the present solution, the above-mentioned structural form is adopted, and the first engaging member is fixed in the mounting shell. In the first state, the first engaging member and the second engaging member are engaged, and 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 external force, the second engaging member moves up in the mounting shell, so that the second engaging member is disengaged from the first engaging member. The disengaged second engaging member can drive the hanging member to rotate because there is no restriction of the first engaging member. Therefore, in the second state, the second engaging member can be rotated to drive the hanging member to rotate an angle and then connected to the hanging seat through the rotation of the second engaging member, so as to realize the hanging of the battery pack and the hanging seat.

[0056] Preferably, the second engaging member includes a matching portion, an elastic portion and a meshing portion which are arranged in sequence from top to bottom, the two ends of the elastic portion are respectively abutted against the matching portion and the meshing portion, and the lower end of the hanging member is connected to the matching portion; in the first state, the meshing portion is meshed with the first meshing member, and the matching portion is disengaged from the meshing portion; in the second state, the meshing portion is disengaged from the first meshing member, and the matching portion is matched with the meshing portion, so that the meshing portion drives the matching portion and the hanging member to rotate.

[0057] In the present solution, the above-mentioned structural form is adopted. In the first state, the meshing portion is meshed with the first meshing member. The meshing portion after meshing cannot rotate under the restriction of the first meshing member. At this time, under the action of the elastic portion, the matching portion is disengaged from the meshing portion. In the second state, under the action of external force, the meshing portion moves up and disengages from the first meshing member, and the matching portion extends into the meshing portion to achieve matching with the meshing portion. At this time, driven by the external force, the meshing portion can drive the matching portion and the hanging member to rotate an angle and then connect to the hanging seat, thereby realizing the hanging of the battery pack and the hanging seat.

[0058] A battery replacement battery pack comprises a battery pack and the hanging device as described above.

[0059] In this solution, the above-mentioned structural form is adopted and the hanging device is applied to the battery pack for battery replacement, which can reduce the overall manufacturing accuracy of the chassis and the manufacturing accuracy of the battery pack. In the process of replacing the battery pack, the positioning accuracy requirements will also be reduced, thereby simplifying the production process and improving production efficiency.

[0060] Preferably, the battery pack includes a battery pack body and a battery rack, the battery rack is circumferentially arranged along the outer surface of the battery pack body, the hanging device also includes a mounting shell, and the hanging member is respectively connected to the battery pack body and the battery rack through the mounting shell.

[0061] In this solution, the above-mentioned structural form is adopted, and the mounting shell is connected to the battery pack body and the battery rack respectively, which improves the stability of the battery pack being hung on the chassis. That is, the hanging parts located on the battery pack body and the mounting shell located on the battery rack can both be connected to the battery pack, thereby improving the stability of the battery pack being hung on the chassis.

[0062] Preferably, the battery pack body has a reinforcing beam, the mounting shell passes through the reinforcing beam and is connected to the upper surface of the reinforcing beam via a fixed base located on the side wall of the mounting shell, the bottom of the hanging member is connected to the mounting shell, the hanging member passes through the reinforcing beam and the battery pack body, and protrudes from the upper surface of the battery pack body.

[0063] In this solution, the above-mentioned structural form is adopted, and the connection between the hanging part and the battery pack body is realized by connecting the fixed base and the reinforcing beam inside the battery pack body. The part of the hanging part protruding from the upper surface of the battery pack body can be hung with the hanging seat, thereby realizing the hanging of the battery pack body on the chassis of the electric vehicle.

[0064] Preferably, the hanging device also includes a seal, which is connected to one end of the mounting shell away from the reinforcing beam and is used to seal the battery pack body and the mounting shell. One end of the seal extends into the mounting shell and fits against the inner wall of the mounting shell, and the other end of the seal is connected to the upper surface of the battery pack body.

[0065] In this solution, the above-mentioned structural form is adopted, and the sealing member is used to prevent foreign objects from entering the battery pack from the mounting shell and affecting the service life of the battery pack.

[0066] Preferably, the mounting shell passes through the battery rack and is connected to the lower surface of the battery rack via a fixing base located at the bottom of the mounting shell, and the hanging member passes through the battery rack and protrudes from the upper surface of the battery rack.

[0067] In this solution, the above-mentioned structural form is adopted, and the base is fixedly connected to the lower surface of the battery rack. The tension applied to the mounting shell acts on the lower surface of the battery rack, so that the bolts are not subjected to tension, thereby preventing the bolts from being damaged and loosened, thereby improving the reliability of the connection between the battery pack and the chassis of the electric vehicle.

[0068] An electric vehicle, comprising the above-mentioned mounting seat, or the electric vehicle comprising the above-mentioned battery replacement battery pack.

[0069] The positive and progressive effects of the present invention are:

[0070] By setting a floating mechanism in the mounting seat, at least two ends of the floating mechanism can be movably connected to the electric vehicle, and the mounting member can be mounted on the mounting seat by rotating. The above method does not require a large gap between the mounting member and the mounting seat, so that the mounting member can be stably mounted on the mounting seat, thereby improving the stability of the battery pack mounting. At the same time, in the process of mounting the battery pack, the floating mechanism can be self-adjusted, so that the threaded part can cooperate with the locking groove, so that the mounting member can be mounted on the mounting seat. There are multiple mounting members on the battery pack, and multiple floating mechanisms on the electric vehicle. The mounting members and the floating mechanisms are connected one by one, and both can be achieved through the self-adjustment of each floating mechanism. The above structural form can reduce the overall manufacturing accuracy of the chassis and the manufacturing accuracy of the battery pack, and in the process of replacing the battery pack, the positioning accuracy requirements will also be reduced, thereby simplifying the production process and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0071] Figure 1 is a schematic diagram of a mounting base in Embodiment 1 of the present invention;

[0072] Figure 2 It is a first stereoscopic schematic diagram of the mounting base in Embodiment 1 of the present invention;

[0073] Figure 3 It is a second stereoscopic schematic diagram of the mounting base in Embodiment 1 of the present invention;

[0074] Figure 4 It is a third stereoscopic schematic diagram of the mounting base in Embodiment 1 of the present invention;

[0075] Figure 5 It is an exploded schematic diagram of the mounting base in Embodiment 1 of the present invention;

[0076] Figure 6 is a cross-sectional schematic diagram of a hooking device in Embodiment 2 of the present invention;

[0077] Figure 7 It is a three-dimensional schematic diagram of the first part of the hanging device in Embodiment 2 of the present invention;

[0078] Figure 8 It is a perspective schematic diagram of the second part of the hanging device in Embodiment 2 of the present invention;

[0079] Fig. 9 It is a three-dimensional schematic diagram of the third part of the hanging device in Embodiment 2 of the present invention;

[0080] Fig.10 It is a partial exploded schematic diagram of the hanging device in Example 2 of the present invention;

[0081] Fig.11 A partial schematic diagram of a battery replacement pack in Embodiment 3 of the present invention;

[0082] Fig.12 It is a three-dimensional schematic diagram of the first part of the battery replacement battery pack in Embodiment 3 of the present invention;

[0083] Fig.13 It is a perspective schematic diagram of the second part of the battery replacement battery pack in Embodiment 3 of the present invention;

[0084] Fig.14 It is a cross-sectional schematic diagram of the middle area of ​​the battery replacement battery pack in Embodiment 3 of the present invention;

[0085] Fig.15 It is a three-dimensional schematic diagram of the battery replacement battery pack in Example 3 of the present invention. DETAILED DESCRIPTION

[0086] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0087] Example 1

[0088] like Figures 1 to 5 As shown, this embodiment 1 provides an electric vehicle 1000, and the electric vehicle 1000 includes a mounting seat 1. The mounting seat 1 is used to be locked with the mounting member 2 to install the battery pack 61 on the electric vehicle 1000. The mounting seat 1 includes a floating mechanism 11, and at least two ends of the floating mechanism 11 can be movably connected to the electric vehicle 1000; the floating mechanism 11 has a locking groove 111, and the locking groove 111 is matched with the threaded portion 22 on the mounting member 2. Specifically, the mounting member 2 is mounted on the mounting seat 1 by rotating. The above method does not require a large gap between the mounting member 2 and the mounting seat 1, so that the mounting member 2 can be stably mounted on the mounting seat 1, thereby improving the stability of the battery pack 61. When the battery pack 61 is mounted on the chassis of the electric vehicle 1000, the floating mechanism 11 can be self-adjusted, so that the threaded portion 22 can be matched with the locking groove 111, so that the mounting member 2 is mounted on the mounting seat 1. In order to achieve stable connection between the battery pack 61 and the electric vehicle 1000, a plurality of attachments 2 are provided on the battery pack 61, and a floating mechanism 11 corresponding to the attachments 2 is provided on the chassis of the electric vehicle 1000. When each attachment 2 is connected with each floating mechanism 11, each floating mechanism 11 can realize the connection between each attachment 2 and each floating mechanism 11 through self-adjustment, thereby reducing the installation accuracy of each floating mechanism 11. The above-mentioned structural form can reduce the overall manufacturing accuracy of the chassis and the manufacturing accuracy of the battery pack 61, and in the process of replacing the battery pack 61, the positioning accuracy requirements can also be reduced, thereby simplifying the production process and improving production efficiency.

[0089] In actual use, in order to make the floating mechanism 11 stably and movably connected to the electric vehicle 1000 , it is preferred that at least two symmetrical ends of the floating mechanism 11 are movably connected to the electric vehicle 1000 .

[0090] In order to realize that at least two ends of the floating mechanism 11 can be movably connected to the electric vehicle 1000, this embodiment can be connected to the electric vehicle 1000 through an elastic member 113. With the above-mentioned structural form, the floating mechanism 11 can be movably connected to the electric vehicle 1000 by using the elastic member 113, so that when the threaded portion 22 is connected to the locking groove 111, energy can be stored by the elastic member 113. When the threaded portion 22 is removed from the locking groove 111, the energy stored in the elastic member 113 can be used to return the floating mechanism 11, and in the process of returning, the elastic member 113 can also provide a buffer for the floating mechanism 11 to prevent the floating mechanism 11 from colliding with the electric vehicle 1000 and affecting the service life of both. The floating mechanism 11 is connected to the electric vehicle 1000 through the elastic member 113, so that the floating mechanism 11 can realize multi-degree-of-freedom activities and improve the range of the floating mechanism 11.

[0091] The elastic member 113 is a spring, which has the characteristics of convenient installation, long service life and low cost. In other embodiments, the elastic member 113 can be a disc spring or the like, and the type of the elastic member 113 is not limited here.

[0092] The floating mechanism 11 comprises a floating body 114, and a plurality of elastic members 113 are respectively connected around the floating body 114. The above-mentioned structural form improves the floating stability of the floating body 114.

[0093] During specific use, two ends of the elastic member 113 are respectively connected to the fixing mechanism 12 and the floating body 114 , and the elastic member 113 can be connected to the electric vehicle 1000 through the fixing mechanism 12 .

[0094] The floating mechanism 11 also has a protrusion 112, which extends outward from the floating body 114, and the locking groove 111 is arranged in the floating body 114 and the protrusion 112. Specifically, by arranging the locking groove 111 in the floating body 114 and the protrusion 112, the depth of the locking groove 111 is increased, and thus when the locking groove 111 cooperates with the threaded portion 22, the connection area between the two is increased, thereby achieving a stable connection between the locking groove 111 and the threaded portion 22. The protrusion 112 extends outward from the floating body 114, so that there is no need to leave a gap between the lower end of the floating mechanism 11 and the fixing mechanism 12 to prevent the protrusion 112 from colliding with the fixing mechanism 12, thereby improving the compactness of the installation structure of the anti-floating mechanism 11.

[0095] The floating mechanism 11 also has a guide hole 115, and the setting position of the guide hole 115 can have several embodiments. In the first embodiment, the guide hole 115 is located at the top of the locking groove 111, which can reduce the interference of the mounting seat 1 on the movement of the threaded portion 22 during the cooperation between 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 from the guide hole 115 to the locking groove 111, thereby preventing the threaded portion 22 and the locking groove 111 from being squeezed and damaged, thereby improving the service life of the threaded portion 22 and the locking groove 111; in the second embodiment, the guide hole 115 is located at the bottom of the locking groove 111, so that the threaded portion 22 can extend from the guide hole 115 into the locking groove 111 and cooperate with the locking groove 111, thereby facilitating the connection between the threaded portion 22 and the locking groove 111; in the third embodiment, the guide holes 115 are provided at the top and bottom of the locking groove 111. Preferably, guide holes 115 are provided at the top and bottom of the locking groove 111. By adopting the above-mentioned method, while facilitating the connection between the threaded portion 22 and the locking groove 111, the interference of the hanging seat 1 on the movement of the threaded portion 22 is reduced, and damage between the threaded portion 22 and the locking groove 111 due to extrusion is prevented, thereby improving the service life of the threaded portion 22 and the locking groove 111.

[0096] The guide hole 115 has a first guide sliding surface 116. With the above structural form, in the first embodiment, the first guide sliding surface 116 can facilitate the threaded portion 22 to extend from the guide hole 115 into the locking groove 111, reducing the resistance of the threaded portion 22 entering the guide hole 115; in the second embodiment, the first guide sliding surface 116 can facilitate the threaded portion 22 to extend from the guide hole 115 into the locking groove 111, reducing the resistance of the threaded portion 22 to extend from the guide hole 115; in the third embodiment, the first guide sliding surface 116 can facilitate the threaded portion 22 to extend from the guide hole 115 into the locking groove 111, and also facilitate the threaded portion 22 to extend from the guide hole 115 into the locking groove 111.

[0097] The mounting base 1 further includes a fixing mechanism 12, in which the floating mechanism 11 is connected in a floating manner, and the fixing mechanism 12 is fixedly connected to the electric vehicle 1000. With the above-mentioned structural form, the floating mechanism 11 is connected in a floating manner to the fixing mechanism 12, and the floating mechanism 11 can be protected by the fixing mechanism 12, thereby reducing damage to the floating mechanism 11 by the outside world and increasing the service life of the floating mechanism 11; furthermore, the floating mechanism 11 is connected to the electric vehicle 1000 through the fixing mechanism 12, thereby increasing the contact area between the mounting base 1 and the electric vehicle 1000 and improving the stability of the connection between the mounting base 1 and the electric vehicle 1000.

[0098] The fixed mechanism 12 has a floating cavity 125, and the floating mechanism 11 is located in the floating cavity 125 and is movably connected to the fixed mechanism 12. With the above structure, the floating mechanism 11 is protected by the fixed mechanism 12, and a movable space is provided for the floating mechanism 11 through the floating cavity 125, so that collision between the fixed mechanism 12 and the floating mechanism 11 is prevented, thereby increasing the service life of both.

[0099] The fixing mechanism 12 has a first through hole 126 at the bottom, which is connected to the floating cavity 125 and is used to avoid the hanging part 2. The above statement can be expressed in another way: that is, 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 under the action of external force; then the hanging part 2 extending into the floating cavity 125 continues to move into the locking groove 111 to cooperate with the locking groove 111. The above structural form facilitates the hanging part 2 to extend into the floating cavity 125.

[0100] In specific use, the diameter of the first through hole 126 may be larger than the diameter of the guide hole 115 located at the lower end of the floating cavity 125 , so that the guide portion 21 and the threaded portion 22 can be easily inserted.

[0101] The fixing mechanism 12 has a second through hole 124 at the top, and the second through hole 124 is connected to the first through hole 126 through the floating cavity 125, and the second through hole 124 is used to avoid the hanging part 2. The above statement can be expressed in another way: when the threaded portion 22 in the hanging part 2 cooperates with the locking groove 111, the hanging part 2 will move upward, and at this time, the upper end of the hanging part 2 can extend from the hanging seat 1 from the second through hole 124, thereby preventing the hanging part 2 and the hanging seat 1 from being damaged due to extrusion, thereby improving the service life of the hanging part 2 and the hanging seat 1, and the upper end of the hanging part 2 can extend from the hanging seat 1 from the second through hole 124, and the threaded portion 22 can also be fully in contact with the locking groove 111, thereby increasing the connection area between the two, thereby improving the stability of the connection between the hanging part 2 and the hanging seat 1, so that the battery pack 61 can be stably hung on the electric vehicle 1000.

[0102] In specific use, the protrusion 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 mounting seat 1. Preferably, the diameter of the second through hole 124 is larger than the diameter of the protrusion 112, so as to prevent the second through hole 124 from affecting the movement of the protrusion 112.

[0103] When the mounting seat 1 is connected with the mounting member 2, the locking groove 111, the first through hole 126 and the second through hole 124 are all penetrated by the mounting member 2. With the above structure, the locking groove 111 and the threaded portion 22 can be stably connected, and the mounting seat 1 and the mounting member 2 can be stably matched.

[0104] The fixing mechanism 12 includes a fixing plate 122, a limiting plate 123 and two connecting plates 121. The two connecting plates 121 are symmetrically arranged at both ends of the fixing plate 122. The limiting plate 123 is connected to the top of the connecting plate 121 and is used to limit the displacement of the floating mechanism 11 in the vertical direction. The fixing plate 122, the connecting plate 121 and the limiting plate 123 enclose a floating cavity 125. The above can also be expressed as: the floating cavity 125 that provides a space for the floating mechanism 11 to move is realized by enclosing the fixing plate 122, the limiting plate 123 and the two connecting plates 121. The above structural form has the characteristics of convenient processing, simple structure and low cost. Among them, the fixing plate 122 is connected to the electric vehicle 1000 by 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 mounting seat 1 and the electric vehicle 1000, the stability of the connection can be improved. When the hooking member 2 is inserted into the locking groove 111, the floating body 114 will have a large upward displacement. At this time, the limiting plate 123 can be used to prevent the floating body 114 from having a large upward displacement and causing damage to the elastic member 113, thereby improving the service life of the floating mechanism 11. The limiting plate 123 and the fixing plate 122 can be connected by a connecting plate 121, and the connecting plate 121 can also limit the horizontal displacement of the floating body 114 to prevent the floating body 114 from having a large displacement and causing damage to the elastic member 113. The above-mentioned structural form can provide a movable space for the floating mechanism 11 while preventing the floating body 114 from having an excessive displacement and causing damage to the floating body 114 itself and the elastic member 113, thereby improving the service life of the floating mechanism 11.

[0105] The first through hole 126 is provided on the fixing plate 122. The above structure allows the fixing plate 122 to be connected to the electric vehicle 1000 while the first through hole 126 is provided on the fixing plate 122, which facilitates the hooking member 2 to extend into the locking groove 111 and to cooperate with the locking groove 111. The second through hole 124 is provided on the limiting plate 123. The above structure allows the limiting plate 123 to limit the displacement of the floating mechanism 11 while the second through hole 124 is provided on the limiting plate 123, which facilitates the hooking member 2 to extend out of the locking groove 111, preventing the threaded portion 22 and the limiting plate 123 from being squeezed and damaged, thereby increasing the service life of the threaded portion 22 and the limiting plate 123.

[0106] The fixing plate 122 has a plurality of mounting holes 1221, which are arranged at each corner of the fixing plate 122, and are used to connect the fixing mechanism 12 to the electric vehicle 1000. With the above-mentioned structural form, 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, thereby improving the connection stability between the fixing plate 122 and the electric vehicle 1000.

[0107] There are two limit plates 123, and the two limit plates 123 are connected to the two connecting plates 121 respectively. The two limit plates 123 have grooves 1231, and the two grooves 1231 correspond to each other and form a second through hole 124. The above structure reduces the connection accuracy of the limit plates 123 and the connecting plates 121, and ensures the connection reliability of each limit plate 123 and each connecting plate 121. In other embodiments, the number of the limit plate 123 can also be one, and the two ends of the limit plate 123 are connected to the two connecting plates 121 respectively, and the middle of the limit plate 123 is provided with a second through hole 124.

[0108] In specific use, the fixed plate 122, the connecting plate 121 and the limiting plate 123 are all plate-like structures, and the fixing mechanism 12 can be processed by a bending process. The fixed plate 122, the connecting plate 121 and the limiting plate 123 after the bending process are integrally formed, which has the characteristics of convenient processing, material saving and low use cost. Of course, the fixed plate 122, the connecting plate 121 and the limiting plate 123 can also be set separately, and the fixed plate 122, the connecting plate 121 and the limiting plate 123 are connected and enclosed into the floating mechanism 11 by welding or other methods.

[0109] The connecting plate 121 has a connecting hole 1211, and the elastic member 113 is connected to the connecting hole 1211. The above structure is adopted, and the elastic member 113 is connected through the connecting hole 1211, which has the characteristics of simple connection and convenient installation. In addition, the connecting hole 1211 is opened on the connecting plate 121, so that there are gaps between the floating body 114 and the fixed plate 122 and the limiting plate 123, so as to prevent the floating body 114 from colliding with the fixed plate 122 and the limiting plate 123, thereby improving the service life of the floating body 114, the fixed plate 122 and the limiting plate 123. The size of the gap between the floating body 114 and the fixed plate 122, and between the floating body 114 and the limiting plate 123 can be adjusted by adjusting the height of the connecting hole 1211.

[0110] The hanging member 2 has an external thread, and the locking groove 111 has an internal thread, and the external thread is connected to the internal thread, 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.

[0111] Example 2

[0112] like Figures 6 to 10 As shown, this embodiment provides a hooking device 100, and the hooking device 100 includes a hooking member 2 and a hooking seat 1, wherein the hooking member 2 is arranged on the battery pack 61, and the hooking seat 1 is arranged on the chassis of the electric vehicle 1000. The hooking member 2 includes a guide portion 21 and a threaded portion 22, and the guide portion 21 is arranged at the top of the threaded portion 22. In the process of connecting the hooking member 2 with the hooking seat 1, the guide portion 21 first extends into the hooking seat 1 to guide the threaded portion 22, and then the threaded portion 22 extends into the locking groove 111 to cooperate with the locking groove 111. In addition, the guiding of the guide portion 21 can facilitate the hooking member 2 to extend out of the hooking seat 1, thereby preventing the hooking member 2 and the hooking seat 1 from being squeezed and damaged, thereby improving the service life of the hooking member 2 and the hooking seat 1.

[0113] The top of the guide portion 21 has a second guide sliding surface 211, which facilitates the guide portion 21 to extend into or out of the mounting seat 1, and reduces the resistance between the guide portion 21 and the mounting seat 1. Specifically, the guide portion 21 is truncated cone-shaped, and the second guide sliding surface 211 is arranged on the side wall of the truncated cone.

[0114] The guide portion 21 and the threaded portion 22 are integrally formed, and have the characteristics of simple structure and easy processing. The threaded portion 22 can move up to the locking groove 111 following the guide portion 21, and then the threaded portion 22 and the locking groove 111 can be matched by external force, which has the characteristic of easy operation.

[0115] The guide portion 21 and the threaded portion 22 are separately arranged, so that if one of the guide portion 21 and the threaded portion 22 is damaged, only the damaged guide portion 21 and the threaded portion 22 need to be replaced for normal use, thereby reducing the use cost.

[0116] Taking the integral molding of the guide portion 21 and the threaded portion 22 as an example, the process of hanging the battery pack 61 on the electric vehicle 1000 is described. The fixing plate 122 is provided with a first through hole 126, the limiting plate 123 is provided with a second through hole 124, and the upper and lower ends of the locking groove 111 are both provided with guide holes 115. When the battery pack 61 is hung, the guide portion 21 and the threaded portion 22 will move upward under the action of external force. Since the guide portion 21 is located at the upper end of the threaded portion 22, the guide portion 21 enters the hanging seat 1 first during the hanging process. That is, under the action of the guide portion 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 portion 21 sequentially passes through the first through hole 126 and the guide hole 115 at the lower end of the locking groove 111 to enter the locking groove 111, and driven by the guide portion 21, the threaded portion 22 also sequentially passes through the first through hole 126 and the guide hole 115 at the lower end of the locking groove 111 to enter the locking groove 111. In order to make the threaded portion 22 and the locking groove 111 fully cooperate, the hanging member 2 rotates under the action of external force, so that the threaded portion 22 cooperates with the locking groove 111, and the guide portion 21 and the threaded portion 22 continue to move upward. At this time, under the action of the guide portion 21, the second through hole 124 and the guide hole 115 located on the locking groove 111 coincide on the axis, so the guide portion 21 can sequentially extend out of the hanging seat 1 through the guide hole 115 and the second through hole 124 located at the upper end of the locking groove 111. Driven by the guide portion 21, part of the threaded portion 22 may extend out of the hanging seat 1. The above method can achieve a stable connection between the threaded portion 22 and the locking groove 111.

[0117] The hooking device 100 includes a mounting shell 4, a first meshing member 7 and a second meshing member 8. The first meshing member 7 is fixed in the mounting shell 4, the second meshing member 8 is connected to the hooking member 2, and the second meshing member 8 is located in the mounting shell 4 and can move in the mounting shell 4 to switch between a first state and a second state. In the first state, the first meshing member 7 and the second meshing member 8 are meshed. In the second state, the second meshing member 8 is disengaged from the first meshing member 7, and the second meshing member 8 drives the hooking member 2 to rotate. The above statement can also be specifically expressed as: in the first state, since the first meshing member 7 is fixed in the mounting shell 4, the first meshing member 7 and the second meshing member 8 are meshed, and then the second meshing member 8 can be limited by the first meshing member 7 to prevent the second meshing member 8 from rotating. That is, the second meshing member 8 prevents the hooking member 2 from rotating, so that the hooking member 2 is stably connected to the hooking seat 1. In the second state, under the action of external force, the second meshing member 8 moves up and disengages from the first meshing member 7. Without the constraint of the first meshing member 7, the second meshing member 8 can be driven to rotate by the action of external force, so that the second meshing member 8 can drive the hanging member 2 to rotate, and finally the hanging member is connected to the hanging seat 1 after rotating the angle. With the above-mentioned structural form, the first state is the state in which the threaded portion 22 is connected with the locking groove 111; the second state is the state in which the threaded portion 22 is not connected with the locking groove 111.

[0118] The second engagement member 8 includes a matching portion 81, an elastic portion 82 and an engagement portion 83 arranged in sequence from top to bottom, the two ends of the elastic portion 82 are respectively in contact with the matching portion 81 and the engagement portion 83, and the lower end of the hanging member 2 is connected to the matching portion 81; in the first state, the engagement portion 83 is engaged with the first engagement member 7, and the matching portion 81 is disengaged from the engagement portion 83; in the second state, the engagement portion 83 is disengaged from the first engagement member 7, and the matching portion 81 is engaged with the engagement portion 83, so that the engagement portion 83 drives the matching portion 81 and the hanging member 2 to rotate. The above statement can be specifically described as: in the first state, since the first engagement member 7 is fixed in the mounting shell 4, the engagement portion 83 after engagement cannot be rotated under the restriction of the first engagement member 7, and at this time, under the action of the elastic portion 82, the matching portion 81 is disengaged from the engagement portion 83. In this state, even if an external force is applied, the hanging member 2 cannot be rotated, thereby achieving reliable hanging. In the second state, under the action of external force, the meshing portion 83 moves upward, so that the meshing portion 83 is disengaged from the first meshing member 7, and the meshing portion 83 after moving upward compresses the elastic portion 82 to achieve the matching of the matching portion 81 and the meshing portion 83, and at the same time, driven by the guide portion 21, the threaded portion 22 enters the locking groove 111. Subsequently, driven by the external force, the meshing portion 83 rotates and then drives the hanging member 2 to rotate an angle, and the threaded portion 22 is matched and connected with the locking groove 111. Specifically, the mounting shell 4 can be provided with an avoidance hole 5, and the unlocking device can contact the hanging member 2 through the avoidance hole 5. That is, in the second state, the meshing portion 83 can be moved upward and disengaged from the first meshing member 7 firstly through the unlocking device, and then the unlocking device drives the matching portion 81 and the hanging member 2 to rotate through the meshing portion 83, and then the threaded portion 22 is connected with the locking groove 111 through the unlocking device. After the hooking, the unlocking device is disengaged from the meshing portion 83, and the meshing portion 83 moves downward under the action of the elastic portion 82, and the meshing portion 83 after moving downward is meshed with the first meshing member 7, and finally a stable hooking is achieved. The avoidance hole 5 can be located at the bottom of the mounting shell 4, which facilitates the hooking and removal of the battery pack 61.

[0119] Example 3

[0120] like Figures 11 to 15 As shown, an electric vehicle 1000 is a commercial vehicle such as a heavy truck or a light truck. It includes a battery pack 6, and the battery pack 6 includes a battery pack 61 and the hook device 100 in Example 2.

[0121] The battery pack 61 includes a battery pack body 611 and a battery rack 612. The battery rack 612 is arranged circumferentially along the outer surface of the battery pack body 611, and the mounting shell 4 is connected to the battery pack body 611 and the battery rack 612 respectively. With the above-mentioned structural form, the mounting shell 4 is connected to the battery pack body 611 and the battery rack 612 respectively, which improves the stability of the battery pack 61 being hung on the chassis. That is, the hanging part 2 located on the battery pack body 611 and the mounting shell 4 located on the battery rack 612 can both be connected to the battery pack 6, thereby improving the stability of the battery pack 6 being hung on the chassis.

[0122] The battery pack body 611 has a reinforcing beam inside, the mounting shell 4 penetrates the reinforcing beam and is connected to 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 member 2 is connected to the mounting shell 4, the hanging member 2 penetrates the reinforcing beam and the battery pack body 611, and protrudes from the upper surface of the battery pack body 611. With the above-mentioned structural form, the connection between the hanging member 2 and the battery pack body 611 is achieved by connecting the fixing base 3 with the reinforcing beam inside the battery pack body 611. The part of the hanging member 2 protruding from the upper surface of the battery pack body 611 can be hung with the hanging seat 1, thereby realizing the hanging of the battery pack body 611 on the chassis of the electric vehicle 1000.

[0123] The hanging assembly also includes a seal 62, which is connected to one end of the mounting shell 4 away from the reinforcing beam and is used to seal the battery pack body 611 and the mounting shell 4. One end of the seal 62 extends into the mounting shell 4 and fits against the inner wall of the mounting shell 4, and the other end of the seal 62 is connected to the upper surface of the battery pack body 611. With the above-mentioned structural form, the gap between the hanging component 2 and the mounting shell 4 is sealed by the seal 62, thereby preventing foreign objects from entering the battery pack 61 from the mounting shell 4 and affecting the service life of the battery pack 61.

[0124] In specific use, the material of the sealing member 62 can be a rubber material. At the same time, the sealing member 62 is made of rubber material, which can also reduce the wear and tear caused by the friction between the hanging member 2 and the sealing member 62 during the rotation of the hanging member 2.

[0125] The mounting shell 4 penetrates the battery rack 612 and is connected to the lower surface of the battery rack 612 through the fixed base 3 located at the bottom of the mounting shell 4. The hanging member 2 penetrates the battery rack 612 and protrudes from the upper surface of the battery rack 612. When the mounting shell 4 and the fixed base 3 are subjected to tension, the fixed base 3 is subjected to an upward tension, while the pressure exerted by the battery rack 612 on the fixed base 3 is downward, which can offset the upward tension exerted on the fixed base 3, thereby preventing the fixed base 3 from being greatly deformed and affecting the service life. In addition, in the above structure, the bolts can be used only to fix the fixed base 3 and the mounting shell 4, and are not subjected to tension, 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.

[0126] By adopting the technical solution in the above embodiment, the height space under the chassis of the car is fully utilized. When the battery swapping equipment disassembles the battery swapping battery pack, the unloaded battery swapping equipment can directly enter the space below the battery swapping battery pack without interfering with the bottom of the electric car; when the battery swapping equipment installs the battery swapping battery pack, the battery swapping equipment carrying the battery swapping battery pack can also directly enter the bottom of the chassis of the car for battery swapping without interfering with the bottom of the electric car. During the whole process, there is no need to lift the car body, set up a sunken space or dig a pit for the battery swapping equipment to enter and exit, which reduces the cost, time and difficulty of building a battery swapping station, reduces the requirements for the site of the station, and improves the efficiency of battery swapping.

[0127] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A mounting seat, characterized in that: Used to be locked with the hanging piece to install the battery pack on the electric vehicle, the hanging seat includes: A floating mechanism, at least two ends of which are movably connected to the electric vehicle; The mounting seat further comprises a fixing mechanism, the floating mechanism is floatingly connected inside the fixing mechanism, and the fixing mechanism is fixedly connected to the electric vehicle; The fixing mechanism has a floating cavity therein, and the floating mechanism is located in the floating cavity and is movably connected to the fixing mechanism; The fixing mechanism includes a fixing plate, a limiting plate and two connecting plates. The two connecting plates are symmetrically arranged at both ends of the fixing plate. The limiting plate is connected to the top of the connecting plate and is used to limit the displacement of the floating mechanism in the vertical direction. The fixing plate, the connecting plate and the limiting plate together enclose the floating cavity.

2. The mounting base according to claim 1, characterized in that: The floating mechanism is connected to the electric vehicle via an elastic member.

3. The mounting base according to claim 2, characterized in that: The elastic member is a spring; And / or, the floating mechanism comprises a floating body, and the plurality of elastic members are respectively connected around the floating body; preferably, the floating mechanism further comprises a protrusion, the protrusion extends outward from the floating body, and the floating mechanism comprises a locking groove, the locking groove is arranged in the floating body and the protrusion; And / or, the connecting plate has a connecting hole, and the elastic member is connected to the connecting hole.

4. The mounting base according to claim 1, characterized in that: The floating mechanism has a locking groove, and the floating mechanism also has a guide hole, and the guide hole is located at the top and / or bottom of the locking groove; preferably, the guide hole has a first guide sliding surface; And / or, the fixing plate has a plurality of mounting holes, and the plurality of mounting holes are arranged at each corner of the fixing plate, for connecting the fixing mechanism to the electric vehicle; And / or, the hanging member has an external thread, the locking groove has an internal thread, and the external thread is connected to the internal thread, so that the battery pack is connected to the floating mechanism; And / or, the locking groove is cooperatively connected with the threaded portion on the hanging member; And / or, the fixing mechanism has a first through hole at the bottom, the first through hole is connected to the floating cavity, and the first through hole is used to avoid the hanging member; preferably, the fixing mechanism has a second through hole at the top, the second through hole is connected to the first through hole through the floating cavity, and the second through hole is used to avoid the hanging member; more preferably, when the hanging seat is connected with the hanging member, the locking groove, the first through hole and the second through hole are all penetrated by the hanging member; and / or, the first through hole is arranged on the fixing plate; and / or, the second through hole is arranged on the limiting plate; and / or, the number of the limiting plates is two, the two limiting plates are respectively connected to the two connecting plates, the two limiting plates have grooves, the two grooves correspond to each other and form the second through hole.

5. A hooking device, characterized in that: It comprises a hanging piece and a hanging seat as claimed in any one of claims 1 to 4.

6. The hitch device according to claim 5, characterized in that: The hanging member comprises a guide portion and a threaded portion, wherein the guide portion is arranged at the top end of the threaded portion; preferably, the top end of the guide portion has a second guide sliding surface; and / or, the guide portion and the threaded portion are integrally formed; and / or, the guide portion and the threaded portion are separately arranged; And / or, the hanging device further comprises a mounting shell, a first engaging member and a second engaging member, wherein the first engaging member is fixed in the mounting shell, the second engaging member is connected to the hanging member, and the second engaging member is located in the mounting shell and can move in the mounting shell to switch between the first state and the second state; In the first state, the first engagement member and the second engagement member are engaged; In the second state, the second engagement member is disengaged from the first engagement member, and the second engagement member drives the hanging member to rotate; preferably, the second engagement member comprises a matching portion, an elastic portion and a gearing portion arranged in sequence from top to bottom, two ends of the elastic portion are respectively in contact with the matching portion and the gearing portion, and the lower end of the hanging member is connected to the matching portion; In the first state, the engagement portion is engaged with the first engagement member, and the matching portion is disengaged from the engagement portion; In the second state, the meshing portion is disengaged from the first meshing member, and the matching portion cooperates with the meshing portion, so that the meshing portion drives the matching portion and the hanging member to rotate.

7. A battery pack for battery replacement, characterized in that: The battery-replacement battery pack includes a battery pack and a hooking device as described in claim 5 or 6.

8. The battery replacement pack according to claim 7, characterized in that: The battery pack includes a battery pack body and a battery rack, the battery rack is circumferentially arranged along the outer surface of the battery pack body, the hanging device also includes a mounting shell, and the hanging member is respectively connected to the battery pack body and the battery rack through the mounting shell.

9. The battery replacement pack according to claim 8, characterized in that: The battery pack body has a reinforcing beam, the mounting shell passes through the reinforcing beam and is connected to 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 member is connected to the mounting shell, the hanging member passes through the reinforcing beam and the battery pack body, and protrudes from the upper surface of the battery pack body; preferably, the hanging device also includes a sealing member, the sealing member is connected to one end of the mounting shell away from the reinforcing beam, and is used to seal the battery pack body and the mounting shell, one end of the sealing member extends into the mounting shell and fits with the inner wall of the mounting shell, and the other end of the sealing member is connected to the upper surface of the battery pack body; And / or, the mounting shell passes through the battery rack and is connected to the lower surface of the battery rack via a fixing base located at the bottom of the mounting shell, and the hanging member passes through the battery rack and protrudes from the upper surface of the battery rack.

10. An electric vehicle, characterized in that: The electric vehicle includes the mounting seat as described in any one of claims 1-4, or the electric vehicle includes the battery replacement battery pack as described in any one of claims 7-9.

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