Vehicle

Abstract

The utility model provides a vehicle. The vehicle comprises a vehicle body, a battery pack, a fastening unit and a locking piece. The vehicle body comprises a vehicle body floor and a longitudinal beam, the longitudinal beam is connected to the bottom end of the vehicle body floor, and a mounting space is defined by the longitudinal beam and the vehicle body floor; the battery pack is arranged at the bottom of the longitudinal beam; the fastening unit comprises a bolt and a nut, the nut is located in the mounting space and connected with the longitudinal beam, and the bolt sequentially penetrates through the battery pack and the longitudinal beam to be in threaded connection with the nut; one end of the locking piece can be connected with the top end of the bolt in a matched mode so as to lock the bolt and prevent the bolt from rotating in the loosening direction of the bolt. The other end of the locking piece penetrates through the vehicle body floor so as to drive the locking piece to move upwards to be separated from the top end of the bolt under the action of external force, and the bolt is unlocked. The vehicle provided by the utility model is relatively high in use safety.

Description

Technical Field

[0001] The present application relates to the field of vehicle technology, and in particular to a vehicle. Background Art

[0002] In electric vehicles, power batteries are one of the core components, which are used to provide power to the vehicle's electric motor.

[0003] In the related art, the power battery is fixed to the longitudinal beam by bolts. Specifically, a nut is welded on the longitudinal beam, and the bolts pass through the power battery and the longitudinal beam in sequence from bottom to top and are screwed to the nut, thereby fixing the power battery.

[0004] However, in the above-mentioned fastening method of the power battery, the bolts are prone to loosening and detaching, thereby causing the power battery to separate from the longitudinal beam, which will lead to the loss of the power battery and reduce the overall safety of the vehicle. Utility Model Content

[0005] An embodiment of the present application provides a vehicle that can lock the bolts connecting the battery pack and the longitudinal beam to prevent the battery pack from being lost to a certain extent, thereby improving the overall safety of the vehicle.

[0006] The present application provides a vehicle, comprising a vehicle body, a battery pack, a fastening unit and a locking member; the vehicle body comprises a vehicle body floor and a longitudinal beam, the longitudinal beam is connected to the bottom end of the vehicle body floor, and the longitudinal beam and the vehicle body floor enclose an installation space; the battery pack is arranged at the bottom of the longitudinal beam; the fastening unit comprises a bolt and a nut, the nut is located in the installation space and is connected to the longitudinal beam, and the bolt passes through the battery pack and the longitudinal beam in turn and is threadedly connected to the nut; one locking member corresponds to one bolt, and one end of the locking member can be matched and connected with the top end of the bolt to lock the bolt and prevent the bolt from rotating in the loosening direction of the bolt; the other end of the locking member passes through the vehicle body floor to drive the locking member to move upward and disengage from the top end of the bolt when subjected to external force, thereby unlocking the bolt.

[0007] As an optional embodiment, the top end of the bolt forms a first locking surface, and the first locking portion is provided on the first locking surface; the locking member includes a locking body, and a through hole for the locking body to pass through is opened on the vehicle body floor, the locking body and the through hole are slidably matched, and the through hole is connected with the installation space, and the bottom end of the locking body forms a second locking surface, and the second locking portion is provided on the second locking surface; when the first locking portion is matched with the second locking portion, the bolt is locked; when the first locking portion is disengaged from the second locking portion, the bolt is unlocked.

[0008] As an optional embodiment, the first locking portion includes a plurality of first one-way teeth arranged along the circumference of the first locking surface, and the second locking portion includes a plurality of second one-way teeth arranged along the circumference of the second locking surface; the plurality of first one-way teeth correspond one-to-one to the plurality of second one-way teeth, and the first one-way teeth and the second one-way teeth can be engaged and connected to lock the bolt.

[0009] As an optional embodiment, the locking body includes a locking plate and a moving rod; the top end of the locking plate forms a connecting surface and is connected to the moving rod, and the bottom end of the locking plate forms a second locking surface; the moving rod passes through the through hole, and the moving rod slides in conjunction with the through hole; wherein, an elastic member is connected between the connecting surface and the bottom end of the vehicle body floor.

[0010] As an optional implementation, the elastic member is a spring; the orthographic projection area of ​​the moving rod on the connecting surface is located within the connecting surface, and the spring is sleeved on the moving rod.

[0011] As an optional embodiment, a limiting portion is provided on the movable rod; when the first locking portion is coupled with the second locking portion, the limiting portion is located within the installation space; when the first locking portion is disengaged from the second locking portion, the limiting portion is coupled with the vehicle body floor to limit the position of the locking member in the up and down directions.

[0012] As an optional embodiment, the limiting portion is a limiting notch arranged on opposite sides of the moving rod; when the first locking portion and the second locking portion are cooperated and connected, the locking member is in a first position and the limiting notch is located in the installation space; when the first locking portion and the second locking portion are disengaged, the locking member is in a second position, the top wall of the limiting notch stops at the top surface of the vehicle body floor, and the bottom wall of the limiting notch stops at the bottom surface of the vehicle body floor; wherein the second position is above the first position, and the projections of the moving rod at the second position and the moving rod at the first position in the up and down directions have a first angle.

[0013] As an optional implementation, the through hole is an oblong hole.

[0014] As an optional embodiment, the locking member further includes a pull ring, which is arranged at the top end of the locking body.

[0015] As an optional embodiment, two longitudinal beams are provided, the battery pack is provided at the bottom of the two longitudinal beams, and part of the structure of the battery pack is located between the two longitudinal beams.

[0016] As an optional embodiment, the fastening units are arranged in two rows, each row of fastening units includes a plurality of fastening units, and two locking members are provided, with one locking member corresponding to one fastening unit.

[0017] The vehicle provided in this application is provided with a locking piece, one end of which can be cooperated and connected with the top end of the bolt to lock the bolt and prevent the bolt from rotating in the loosening direction of the bolt; the other end of the locking piece passes through the vehicle body floor to drive the locking piece to move upward and disengage from the top end of the bolt when subjected to external force, thereby unlocking the bolt.

[0018] Therefore, in the vehicle provided by this embodiment, a locking member corresponding to the bolt is provided. After the bolt is tightened, the locking member locks the bolt, preventing it from rotating in the direction of loosening. This prevents the bolt from loosening to a certain extent when the vehicle vibrates, thereby improving the reliability of the connection between the battery pack and the vehicle body. Furthermore, if the battery pack is stolen, the thief cannot rotate the bolt, thus preventing the battery pack from being lost.

[0019] In addition, the locking piece can move upward under the action of external force to unlock the bolt. Therefore, when the battery pack fails and needs to be repaired, the locking piece can also unlock the bolt to remove the battery pack from the longitudinal beam by loosening the bolt.

[0020] Therefore, not only the safety of the vehicle provided by this embodiment can be improved, but also the convenience of the vehicle provided by this embodiment can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A cross-sectional view of a partial structure of a vehicle provided in an embodiment of the present application;

[0022] Figure 2 for Figure 1 A structural diagram of the local structure;

[0023] Figure 3 A cross-sectional view of another partial structure of a vehicle provided in an embodiment of the present application;

[0024] Figure 4 for Figure 2 A structural diagram of the local structure;

[0025] Figure 5 A schematic diagram of the three-dimensional structure of a bolt in a vehicle provided in an embodiment of the present application (the thread is not shown);

[0026] Figure 6 A schematic diagram of the connection structure between a locking member and a spring in a vehicle provided in an embodiment of the present application;

[0027] Figure 7 for Figure 2 Schematic diagram of the structure in unlocked state;

[0028] Figure 8 for Figure 7Structural diagram of the local structure.

[0029] Description of reference numerals:

[0030] 1. Vehicle body; 2. Battery pack; 3. Locking member; 4. Fastening unit; 5. Elastic member;

[0031] 11. Car body floor; 12. Longitudinal beam; 13. Installation space; 21. Raised structure; 31. Locking body; 32. Pull ring; 41. Bolt; 42. Nut;

[0032] 111, through hole; 121, beam body; 122, extension portion; 311, second locking surface; 312, second locking portion; 313, locking plate; 314, moving rod; 411, bolt head; 412, bolt rod;

[0033] 1211, first connecting plate; 1212, support plate; 1213, second connecting plate; 3121, second one-way tooth; 3131, connecting surface; 3141, limiting portion; 3142, limiting notch; 4121, first locking surface; 4122, first locking portion; 4123, first one-way tooth. DETAILED DESCRIPTION

[0034] The following will clearly and thoroughly describe the technical solutions in this application in conjunction with the accompanying drawings. In the description of the embodiments of this application, unless otherwise specified, " / " means or, for example, A / B can mean A or B: "and / or" in the text is only a description of the association relationship of associated objects, indicating that there can be three relationships, for example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. In addition, in the description of the embodiments of this application, "multiple" means two or more than two.

[0035] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features.

[0036] In electric vehicles, the power battery is a core component, providing power to the vehicle's electric motor. In related art, the power battery is secured to the longitudinal beam using bolts. Specifically, a nut is welded to the longitudinal beam, and the bolts pass through the power battery and the longitudinal beam from bottom to top before being threaded onto the nut, securing the power battery.

[0037] However, with the aforementioned power battery fastening method, the bolts can easily loosen and detach after the vehicle is lifted, causing the power battery to separate from the longitudinal beam, leading to loss of the power battery and compromising overall vehicle safety. Bolts can loosen when the vehicle vibrates or when subjected to external forces, such as those caused by a thief attempting to loosen the bolts during a theft of the battery pack.

[0038] Therefore, an embodiment of the present application provides a vehicle, which, by providing a locking piece, can lock the bolts after the battery pack is connected to the longitudinal beam, so that even after the entire vehicle is lifted, when the vehicle vibrates or the bolts are subjected to external force, the bolts will not rotate in their loosening direction. In this way, the battery pack can be avoided from being lost, and the safety of the vehicle provided by this embodiment is improved.

[0039] The embodiments of the present application will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0040] Please combine Figure 1 and Figure 2 , Figure 1 A cross-sectional view of a partial structure of a vehicle provided in an embodiment of the present application, Figure 2 for Figure 1 As shown in the figure, this embodiment provides a vehicle, including a vehicle body 1, a battery pack 2, a fastening unit 4 and a locking member 3.

[0041] Specifically, the vehicle body 1 includes a vehicle body floor 11 and two longitudinal beams 12 arranged at intervals. The longitudinal beams 12 are connected to the bottom end of the vehicle body floor 11, and the longitudinal beams 12 and the vehicle body floor 11 enclose an installation space 13; the battery pack 2 is arranged at the bottom of the two longitudinal beams 12.

[0042] The longitudinal beam 12 includes a downwardly recessed beam body 121 and extensions 122 connected to opposite sides of the beam body 121. The extensions 122 are connected to the vehicle body floor 11, so that the longitudinal beam 12 and the vehicle body floor 11 enclose an installation space 13. The two extensions 122 are connected to opposite sides of the beam body 121.

[0043] Specifically, the beam body 121 includes a first connecting plate 1211, a support plate 1212 and a second connecting plate 1213 connected in sequence. The first connecting plate 1211 and the second connecting plate 1213 both extend in the up and down directions, and the first connecting plate 1211 is connected to one extension part 122, and the second connecting plate 1213 is connected to another extension part 122. The battery pack 2 abuts against the bottom end of the support plate 1212.

[0044] It is understood that the vehicle body floor 11 and the longitudinal beam 12 are both sheet metal components. Therefore, the connection between the extension portion 122 and the vehicle body floor 11 can be welding. The materials of the extension portion 122 and the vehicle body floor 11, and the connection method between the extension portion 122 and the vehicle body floor 11, are not specifically limited.

[0045] In some embodiments, the middle portion of the battery pack 2 is formed as a raised structure 21 and is located between the two longitudinal beams 12. In this way, the space under the vehicle body floor 11 can be fully utilized, and more battery cells can be arranged in the battery pack 2 to increase the battery capacity of the battery pack 2.

[0046] Furthermore, the fastening units 4 are arranged in two rows, and the two rows of fastening units 4 are arranged in a one-to-one correspondence with the two longitudinal beams 12. Each row of fastening units 4 includes at least one fastening unit 4. The fastening unit 4 includes a bolt 41 and a nut 42. The nut 42 is located in the installation space 13 and is connected to the longitudinal beam 12. Specifically, the nut 42 is welded to the support plate 1212, and the bolt 41 passes through the battery pack 2 and the support plate 1212 of the longitudinal beam 12 in turn and is screwed to the nut 42.

[0047] It should be noted that each row of fastening units 4 may include two fastening units 4, four fastening units 4, six fastening units 4, or eight fastening units 4. The number of fastening units 4 required is determined by the actual size of the battery pack 2. There is no specific limitation on the number of fastening units 4.

[0048] Please combine Figure 3 , Figure 3 A cross-sectional view of another local structure of a vehicle provided in an embodiment of the present application.

[0049] like Figure 3 As shown, in another embodiment, the bottom end of the vehicle body floor 11 can be connected to only one longitudinal beam 12, and the longitudinal beam 12 is located in the middle of the vehicle body floor 11. The battery pack 2 can be connected to the lower end of the longitudinal beam 12 via fastening units 4, and the number of fastening units 4 can also be set to multiple. In this case, the above-mentioned raised structures 21 are formed on opposite sides of the battery pack 2 to increase the battery capacity of the battery pack 2.

[0050] It should be noted that, regardless of whether the battery pack 2 is connected to the lower ends of two longitudinal beams 12 or to the lower end of one longitudinal beam 12 , the structure of the fastening unit 4 is the same, and the locking method of the battery pack 2 is also the same.

[0051] Specifically, the bolt 41 includes a bolt head 411 and a bolt rod 412 connected together, wherein the bolt head 411 is abutted against the bottom end of the battery pack 2, and the bolt rod 412 passes through the battery pack 2 and the support plate 1212 in sequence and is screwed to the nut 42.

[0052] In related art, bolts 41 may loosen due to external forces after the entire vehicle is lifted. Therefore, this embodiment provides locking members 3. Since multiple fastening units 4 are provided, multiple locking members 3 are also provided, with one locking member 3 corresponding to one bolt 41. This improves the reliability of the connection between the battery pack 2 and the vehicle body 1.

[0053] Specifically, one end of the locking member 3 can be connected with the top end of the bolt 41 to lock the bolt 41 and prevent the bolt 41 from rotating in the loosening direction of the bolt 41; the other end of the locking member 3 passes through the vehicle body floor 11 to drive the locking member 3 to move upward and disengage from the top end of the bolt 41 when subjected to external force, thereby unlocking the bolt 41.

[0054] Therefore, in the vehicle provided by this embodiment, a locking member 3 is provided corresponding to bolt 41. This locks bolt 41 after it is tightened, preventing it from rotating in the direction intended for its release. This prevents bolt 41 from loosening to a certain extent when the vehicle vibrates, thereby improving the connection reliability between battery pack 2 and vehicle body 1. Furthermore, if battery pack 2 is stolen, the thief cannot rotate bolt 41, thus preventing the battery pack 2 from being lost.

[0055] Furthermore, the locking member 3 can be moved upward under the action of an external force to unlock the bolt 41. Therefore, if the battery pack 2 fails and needs to be repaired, the locking member 3 can be used to unlock the bolt 41, and the battery pack 2 can be removed from the longitudinal beam 12 by loosening the bolt 41. This not only improves the safety of the vehicle provided by this embodiment, but also improves its ease of use.

[0056] It should be noted that, generally, the top end of the locking member 3 is exposed in the cab for easy operation.

[0057] Please combine Figures 4 to 6 , Figure 4 for Figure 2 A schematic diagram of the local structure of Figure 5 This is a schematic diagram of the three-dimensional structure of a bolt in a vehicle provided in an embodiment of the present application (the thread is not shown). Figure 6A schematic diagram of the connection structure between a locking member and a spring in a vehicle provided in an embodiment of the present application. As shown in the figure, to achieve locking of the bolt 41 by the locking member 3, in some embodiments, the top end of the bolt rod 412 forms a first locking surface 4121, on which a first locking portion 4122 is provided. The locking member 3 includes a locking body 31, a through hole 111 is defined in the vehicle body floor 11 for the locking body 31 to pass through, the locking body 31 slidingly engages with the through hole 111, and the through hole 111 is connected to the installation space 13. The bottom end of the locking body 31 forms a second locking surface 311, on which a second locking portion 312 is provided. When the first locking portion 4122 engages with the second locking portion 312, the bolt 41 is locked. When the first locking portion 4122 disengages from the second locking portion 312, the bolt 41 is unlocked.

[0058] Specifically, the first locking portion 4122 includes a plurality of first one-way teeth 4123 arranged circumferentially along the first locking surface 4121, and the second locking portion 312 includes a plurality of second one-way teeth 3121 arranged circumferentially along the second locking surface 311; the plurality of first one-way teeth 4123 correspond one-to-one to the plurality of second one-way teeth 3121, and the first one-way teeth 4123 and the second one-way teeth 3121 can be meshed and connected to lock the bolt 41.

[0059] In this way, when the first one-way teeth 4123 and the second one-way teeth 3121 are engaged, the bolt 41 will not rotate in the loosening direction of the bolt 41 even under the action of an external force. In this way, the bolt 41 can be locked.

[0060] In a specific implementation of this embodiment, the locking body 31 includes a locking plate 313 and a moving rod 314; the top end of the locking plate 313 forms a connecting surface 3131 and is connected to the moving rod 314, and the bottom end of the locking plate 313 forms a second locking surface 311; the moving rod 314 passes through the through hole 111 and slides with the through hole 111.

[0061] It is understandable that in the process of locking the bolt 41, relying solely on the gravity of the locking member 3 may cause unreliable engagement between the first one-way tooth 4123 and the second one-way tooth 3121, thereby affecting the locking effect of the locking member 3 on the bolt 41.

[0062] Therefore, to improve the meshing reliability between the first one-way teeth 4123 and the second one-way teeth 3121, in some optional embodiments, an elastic member 5 may be connected between the connecting surface 3131 and the bottom end of the vehicle body floor 11. In this manner, the elastic member 5, under the action of its elastic force, causes the locking member 3 to have a downward movement tendency, thereby improving the meshing reliability between the first one-way teeth 4123 and the second one-way teeth 3121, thereby improving the locking effect of the locking member 3 on the bolt 41, and further preventing the bolt 41 from loosening.

[0063] In a specific implementation of this embodiment, the elastic member 5 is a spring; the orthographic projection area of ​​the moving rod 314 on the connecting surface 3131 is located inside the connecting surface 3131, and the spring is sleeved on the moving rod 314. In this way, the stability of the spring during the deformation process can be improved.

[0064] It is understandable that if the bolt 41 needs to be unlocked, the locking member 3 needs to be lifted up. After the locking member 3 is lifted up, if it needs to be kept in the lifted position, manual pulling force needs to be continuously provided. This makes the use of the locking member 3 less convenient. Therefore, in some embodiments, a corresponding structure can be provided to limit the position of the locking member 3 to the lifted position.

[0065] Please combine Figure 7 and Figure 8 , Figure 7 for Figure 2 Schematic diagram of the structure in unlocked state, Figure 8 for Figure 7 In some optional embodiments, a limiting portion 3141 is provided on the movable rod 314; when the first locking portion 4122 is engaged with the second locking portion 312, the limiting portion 3141 is located within the installation space 13; when the first locking portion 4122 is disengaged from the second locking portion 312, the limiting portion 3141 is engaged with the vehicle body floor 11 to limit the vertical position of the locking member 3.

[0066] Specifically, the limiting portion 3141 is a limiting notch 3142 arranged on opposite sides of the moving rod 314; when the first locking portion 4122 is cooperated with the second locking portion 312, the locking member 3 is in the first position, and the limiting notch 3142 is located in the installation space 13; when the first locking portion 4122 is disengaged from the second locking portion 312, and the locking member 3 is in the second position, the limiting notch 3142 on the moving rod 314 forms a snap-fitting relationship with the vehicle body floor 11, so that the locking member 3 can be maintained at the current height position, thereby freeing the operator's hands and not having to manually provide a pulling force for the locking member 3 all the time.

[0067] Specifically, when the locking member 3 is engaged with the vehicle body floor 11, the top wall of the limiting notch 3142 stops at the top surface of the vehicle body floor 11, and the bottom wall of the limiting notch 3142 stops at the bottom surface of the vehicle body floor 11; wherein, the second position is located above the first position, and the projections of the moving rod 314 at the second position and the moving rod 314 at the first position in the up and down directions have a first angle, and the first angle here can be 90 degrees.

[0068] In this way, through the stopping effect of the top wall of the limiting notch 3142 and the top surface of the vehicle body floor 11, as well as the stopping effect of the bottom wall of the limiting notch 3142 and the bottom surface of the vehicle body floor 11, the locking member 3 can be restricted to the second position, so that there is no need to manually lift the locking member 3.

[0069] It should be noted that when the locking member 3 moves from the first position to the second position, the locking member 3 both rises and rotates. That is, the orientation of the limiting notch 3142 when the locking member 3 is in the second position is different from the orientation of the limiting notch 3142 when the locking member 3 is in the first position. For example, when the locking member 3 is in the second position, the limiting notch 3142 faces the first direction, while when the locking member 3 is in the first position, the limiting notch 3142 faces the second direction.

[0070] At this time, the angle formed between the first direction and the second direction is equal to the first angle mentioned above. Exemplarily, the angle formed between the first direction and the second direction is 90 degrees.

[0071] Specifically, during the use of the locking member 3, if the battery pack 2 needs to be disassembled and repaired, the locking member 3 needs to be manually lifted. When the two limiting notches 3142 move to the position of the through hole 111, the locking member 3 is rotated so that the top wall of the limiting notch 3142 stops above the top of the vehicle body floor 11, and the bottom wall of the limiting notch 3142 stops below the bottom end of the vehicle body floor 11. In this way, the locking member 3 can be limited to this position, and then the bolt 41 is loosened to remove the battery pack 2 from the longitudinal beam 12.

[0072] In this embodiment, to ensure that through-hole 111 matches the contour of locking member 3, through-hole 111 can be an oblong hole. Specifically, when locking member 3 is in the unlocked position with respect to bolt 41, the minor axis dimension of through-hole 111 can be determined by the distance between the sidewalls of the two retaining notches 3142. The shape of through-hole 111 is not particularly limited, as long as it can achieve positional retention between retaining notches 3142 and vehicle body floor 11.

[0073] Since the top of the locking member 3 needs to be pulled when unlocking the bolt 41, manual operation is required. To facilitate the pulling of the locking member 3, in some specific embodiments, the locking member 3 further includes a pull ring 32, which is disposed at the top of the movable rod 314. As shown in the figure, the pull ring 32 can be rotatably connected to the movable rod 314. Here, the connection method between the pull ring 32 and the movable rod 314 is not specifically limited.

[0074] In addition, in the specific implementation of this embodiment, the locking member 3 is made of metal material. Therefore, the locking plate 313 and the moving rod 314 can be connected together by welding, and the second one-way tooth 3121 can be formed on the second locking surface 311 by stamping, or the second one-way tooth 3121 can be separately processed and then welded to the second locking surface 311. Of course, the first one-way tooth 4123 can also be formed by these two methods, and no specific restrictions are made here.

[0075] The above content is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A vehicle, characterized in that: include: A vehicle body, comprising a vehicle body floor and a longitudinal beam, wherein the longitudinal beam is connected to a bottom end of the vehicle body floor, and the longitudinal beam and the vehicle body floor enclose an installation space; a battery pack, disposed at the bottom of the longitudinal beam; a fastening unit, comprising a bolt and a nut, wherein the nut is located in the installation space and connected to the longitudinal beam, and the bolt sequentially passes through the battery pack and the longitudinal beam and is threadedly connected to the nut; and A locking piece, one end of which can be engaged with the top end of the bolt to lock the bolt and prevent the bolt from rotating in the loosening direction of the bolt; the other end of the locking piece passes through the vehicle body floor to drive the locking piece to move upward and disengage from the top end of the bolt when subjected to external force, thereby unlocking the bolt.

2. The vehicle according to claim 1, characterized in that The top end of the bolt forms a first locking surface, and the first locking surface is provided with a first locking portion; The locking member includes a locking body, a through hole for the locking body to pass through is opened on the vehicle body floor, the locking body is slidably engaged with the through hole, the through hole is connected to the installation space, the bottom end of the locking body forms a second locking surface, and the second locking surface is provided with a second locking portion; When the first locking portion is engaged with the second locking portion, the bolt is locked; When the first locking portion is disengaged from the second locking portion, the bolt is unlocked.

3. The vehicle according to claim 2, characterized in that The first locking portion includes a plurality of first one-way teeth arranged along the circumference of the first locking surface, and the second locking portion includes a plurality of second one-way teeth arranged along the circumference of the second locking surface; The plurality of first one-way teeth correspond to the plurality of second one-way teeth in a one-to-one manner, and the first one-way teeth and the second one-way teeth can be meshed and connected to lock the bolt.

4. The vehicle according to claim 2, characterized in that The locking body includes a locking plate and a moving rod; The top end of the locking plate forms a connecting surface and is connected to the moving rod, and the bottom end of the locking plate forms the second locking surface; The moving rod passes through the through hole, and the moving rod is slidably engaged with the through hole; Wherein, an elastic member is connected between the connecting surface and the bottom end of the vehicle body floor.

5. The vehicle according to claim 4, characterized in that The elastic member is a spring; The orthographic projection area of ​​the moving rod on the connecting surface is located within the connecting surface, and the spring is sleeved on the moving rod.

6. The vehicle according to claim 4, characterized in that A limiting portion is provided on the moving rod; When the first locking portion is engaged with the second locking portion, the limiting portion is located within the installation space; When the first locking portion is disengaged from the second locking portion, the limiting portion is cooperatively connected with the vehicle body floor to limit the position of the locking member in the up and down directions.

7. The vehicle according to claim 6, characterized in that The limiting portion is a limiting notch provided on opposite sides of the moving rod; When the first locking portion is engaged with the second locking portion, the locking member is in the first position, and the limiting notch is located in the installation space; When the first locking portion is disengaged from the second locking portion, the locking member is in the second position, the top wall of the limiting notch is stopped at the top surface of the vehicle body floor, and the bottom wall of the limiting notch is stopped at the bottom surface of the vehicle body floor; The second position is located above the first position, and the projections of the moving rod at the second position and the moving rod at the first position in the vertical direction have a first angle.

8. The vehicle according to any one of claims 2 to 7, characterized in that The through hole is an oblong hole.

9. The vehicle according to any one of claims 2 to 7, characterized in that The locking member further includes a pull ring, which is arranged on the top end of the locking body.

10. The vehicle according to any one of claims 1 to 7, characterized in that There are two longitudinal beams, the battery pack is arranged at the bottom of the two longitudinal beams, and a part of the structure of the battery pack is located between the two longitudinal beams; and / or, The fastening units are arranged in two rows, each row of the fastening units includes a plurality of the fastening units, and the locking members are arranged in a plurality, with one locking member corresponding to one fastening unit.

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