Height adjusting device and vehicle

Abstract

The utility model relates to a height adjusting device and a vehicle. The height adjusting device comprises a power source and a transmission mechanism. One end of the transmission mechanism is connected with the power source, the other end of the transmission mechanism is suitable for being connected with the battery pack, the power source drives the transmission mechanism to enable the battery pack to move, the height of the battery pack is adjusted through the height adjusting device, and when the road condition is stable, the height of the battery pack is reduced, and the running stability of the vehicle is improved; when the road condition is large in pothole and fluctuation, the height adjusting device lifts the battery pack to increase the ground clearance of the battery pack, the risk that the battery pack is damaged by knocking the ground in the driving process is reduced, and the technical problem that the height of the battery pack cannot be adjusted is solved through the height adjusting device.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle equipment, and in particular, to a height adjustment device and a vehicle. Background Art

[0002] Currently, new energy vehicles need to be equipped with battery packs. The battery packs are arranged below the middle section of the frame longitudinal beam and are fixed to the frame to form a whole. The battery packs move with the frame and are at the lowest position of the large frame. This sacrifices ground clearance to a certain extent, reduces off-road playability, and there is a risk of the battery pack hitting the ground. Utility Model Content

[0003] An object of the present disclosure is to provide a battery pack lifting and adjusting device, which can overcome the above-mentioned problems or at least partially solve the above-mentioned problems.

[0004] In order to solve the above problems, this application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a height adjustment device, the height adjustment device comprising a power source and a transmission mechanism;

[0006] The transmission mechanism is connected to the power source; the power source is suitable for being connected to a vehicle, and the transmission mechanism is suitable for being connected to a battery pack; the power source drives the transmission mechanism to move the battery pack in a height direction of the vehicle.

[0007] The battery pack adjusts its ground height through the height adjustment device. When the road condition is smooth, the ground height of the battery pack is lowered to improve the driving stability of the vehicle. When the road condition is bumpy, the height adjustment device raises the ground height of the battery pack to reduce the risk of the battery pack hitting the ground and being damaged during driving, thereby better protecting the battery pack and improving safety during driving.

[0008] In some embodiments, the transmission mechanism includes a flexible member, one end of the flexible member is connected to the power source, and the other end of the flexible member is suitable for connecting to the battery pack to drive the battery pack to move.

[0009] In some embodiments, the power source includes a power output shaft; the transmission mechanism also includes a rotating drive disk, the rotating drive disk is connected to the power output shaft, and the rotating drive disk is also connected to the flexible member so that the flexible member can wrap around the rotating drive disk in the circumferential direction of the rotating drive disk.

[0010] In some embodiments, the rotating drive disk is provided with a guide groove in the circumferential direction; when the rotating drive disk moves along a first direction, the flexible member wraps around the guide groove, and when the rotating drive disk moves along a second direction, the flexible member is released from the guide groove.

[0011] In some embodiments, the radius of the rotary drive disc is greater than the radius of the power take-off shaft.

[0012] In some embodiments, a lifting frame is further included, wherein the lifting frame is suitable for connecting to a battery pack, and the flexible member is connected to the battery pack via the lifting frame.

[0013] In some embodiments, the lifting frame is a frame structure with a through hole in the middle, and at least part of the battery pack is connected to the lifting frame at a position passing through the through hole.

[0014] In some embodiments, the height adjustment device further includes a front cross beam, a rear cross beam, a left longitudinal beam and a right longitudinal beam, wherein the front cross beam, the rear cross beam, the left longitudinal beam and the right longitudinal beam are connected to form a U-shaped structure; and a projection of the lifting frame on the vehicle height at least partially overlaps with a projection of the U-shaped structure on the vehicle height.

[0015] In some embodiments, the height adjustment device further comprises a pulley, and the pulley is rotatably connected to the front beam or the rear beam; the flexible member changes its extension direction by winding around the pulley.

[0016] In some embodiments, the height adjustment device further includes a telescopic frame, the telescopic frame including a telescopic portion and a connecting portion, the first end of the connecting portion is rotatably connected to the second end of the telescopic portion, the first end of the telescopic portion is rotatably connected to the front cross beam and the rear cross beam, and the second end of the connecting portion is rotatably connected to the lifting frame; wherein the telescopic portion is constructed to have a variable length in the vehicle height direction.

[0017] In some embodiments, the telescopic portion includes a first connecting rod and a second connecting rod, the first connecting rod and the second connecting rod are rotatably connected to form an X-shaped structure; the first end of the first connecting rod is rotatably connected to the front cross beam; the first end of the second connecting rod is rotatably connected to the rear cross beam;

[0018] The connecting part includes a third connecting rod and a fourth connecting rod, wherein the first end of the third connecting rod is rotatably connected to the second end of the second connecting rod, and the second end of the third connecting rod is rotatably connected to the lifting frame; the first end of the fourth connecting rod is rotatably connected to the second end of the first connecting rod, and the second end of the fourth connecting rod is rotatably connected to the lifting frame.

[0019] In some embodiments, the telescopic frame includes a first telescopic frame and a second telescopic frame spaced apart in the vehicle width direction, wherein the first telescopic frame is connected to the first end of the front cross beam and the first end of the rear cross beam, and the second telescopic frame is connected to the second end of the front cross beam and the second end of the rear cross beam.

[0020] In some embodiments, the power source also includes a motor, the power output shaft includes a first power output shaft and a second power output shaft, and the rotating drive disk includes a first rotating drive disk and a second rotating drive disk; one end of the first power output shaft is connected to the first end of the motor, and the other end of the first power output shaft is connected to the first rotating drive disk, one end of the second power output shaft is connected to the second end of the motor, and the other end of the second power output shaft is connected to the second rotating drive disk.

[0021] In some embodiments, the flexible member includes a first flexible member and a second flexible member, and the pulleys include a first pulley, a second pulley, a third pulley and a fourth pulley; the first pulley is connected to the first end of the front cross beam, the second pulley is connected to the first end of the rear cross beam, the third pulley is connected to the second end of the rear cross beam, and the fourth pulley is connected to the second end of the front cross beam; in the vehicle length direction, the first rotating drive disk is between the first pulley and the second pulley;

[0022] In the vehicle length direction, the second rotating drive disk is located between the third pulley and the fourth pulley; the first flexible member is wound around the first rotating drive disk, the first pulley and the second pulley, and the second flexible member is wound around the second rotating drive disk, the third pulley and the fourth pulley.

[0023] In the second aspect, an embodiment of the present application proposes a vehicle, which includes a height adjustment device and a battery pack, wherein the height adjustment device is connected to the battery pack, and the height adjustment device includes a power source and a transmission mechanism; the transmission mechanism is connected to the power source; the power source is suitable for being connected to the vehicle, and the transmission mechanism is suitable for being connected to the battery pack; the power source drives the transmission mechanism so that the battery pack can adjust its height from the ground in the height direction of the vehicle. When the road condition is smooth, the height of the battery pack from the ground can be lowered to improve the driving stability of the vehicle. When the road condition is bumpy, the transmission mechanism drives the battery pack to rise to increase the height of the battery pack from the ground, effectively reducing the risk of the battery pack hitting the ground, avoiding safety problems caused by damage to the battery pack, and better protecting the battery pack and driving safety.

[0024] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0026] Figure 1is a structural schematic diagram of a height adjustment device described in an embodiment of the present application;

[0027] Figure 2 is an exploded view of a height adjustment device described in an embodiment of the present application;

[0028] Figure 3 is a schematic structural diagram of a vehicle according to an embodiment of the present application;

[0029] Figure 4 It is a schematic diagram of the structure of the frame described in the embodiment of the present application.

[0030] Reference numerals:

[0031] Power source-1000; motor-1100; power output shaft-1200; first power output shaft-1210; second power output shaft-1220; transmission mechanism-2000; rotating drive disk-2100; guide groove-2101; first rotating drive disk-2110; second rotating drive disk-2120; flexible member-2200; first flexible member-2210; second flexible member-2200; battery pack-3000; pulley-5000; first pulley-5100; second pulley-5200; third pulley-5300; fourth pulley-5300; lifting frame-6000; front crossbeam-7100; rear crossbeam-7300; right longitudinal beam-7200; left longitudinal beam-7200; telescopic frame-4000 ; Telescopic part-4100; Connecting part-4200; First link-4110; First end of the first link-4111; Second end of the first link-4112; Second link-4120; First end of the second link-4121; Second end of the second link-4122; Third link-4210; First end of the third link-4211; Second end of the third link-4212; Fourth link-4220; First end of the fourth link-4221; Second end of the fourth link-4222; First telescopic frame-8100; Second telescopic frame-8200; Vehicle-2; Height adjustment device-3; Front section module-11; Middle section module-12; Rear section module-13; First mounting part-111; Second mounting part-131. DETAILED DESCRIPTION

[0032] The embodiments of the utility model will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the utility model, and cannot be understood as limiting the utility model. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0033] The terms "first", "second", "third", and "fourth" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, "multiple" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Reference Figure 1 , shows a schematic diagram of the structure of a height adjustment device according to an embodiment of the present application,

[0037] According to Figure 2 , showing an exploded view of a height adjustment device according to an embodiment of the present application, referring to Figure 3 is a structural schematic diagram of a vehicle according to an embodiment of the present application; the height adjustment device may specifically include: a power source 1000 and a transmission mechanism 2000;

[0038] The transmission mechanism 2000 is connected to the power source 1000; for example, the power source 1000 can be connected to a vehicle, and the transmission mechanism 2000 is suitable for connecting to a battery pack 3000; the power source 1000 drives the transmission mechanism 2000 to move the battery pack 3000 in the height direction of the vehicle.

[0039] The battery pack 3000 adjusts its height above the ground through the height adjustment device. When the road condition is smooth, the height of the battery pack 3000 above the ground is lowered to improve the stability of the vehicle. When the road condition is bumpy, the height adjustment device raises the battery pack 3000 above the ground to reduce the risk of the battery pack 3000 hitting the ground and being damaged during driving, thereby better protecting the battery pack 3000 and improving safety during driving.

[0040] In some embodiments, the transmission mechanism 2000 includes a flexible member 2200, one end of which is connected to the power source 1000, and the other end of which is suitable for connecting to the battery pack 3000 to drive the battery pack 3000 to move. The flexible member 2200 is bendable or foldable, and the direction of force transmission is changed by changing the extension direction of the flexible member 2200, so that the battery pack 3000 is subjected to a force in the vehicle height direction, thereby adjusting the height of the battery pack 3000 from the ground.

[0041] In some embodiments, the power source 1000 includes a power output shaft 1200, which transmits power to the transmission mechanism 2000; the transmission mechanism 2000 also includes a rotating drive disk 2100, which is connected to the power output shaft 1200, and the rotating drive disk 2100 is also connected to the flexible member 2200 so that the flexible member 2200 can wrap around the rotating drive disk 2100 in the circumferential direction of the rotating drive disk 2100. For example, the central axis of the power output shaft 1200 can be colinear with the central axis of the rotating drive disk 2100.

[0042] In some embodiments, the rotating drive disk 2100 is provided with a guide groove 2101 in the circumferential direction;

[0043] When the rotating drive disk 2100 moves along the first direction, the flexible member 2200 is wrapped around the guide groove 2101, so that the length of the flexible member 2200 wrapped around the guide groove 2101 is increased, thereby lifting the battery pack 3000 and increasing the height from the ground; when the rotating drive disk 2100 moves along the second direction, the flexible member 2200 is released from the guide groove 2101, so that the length of the flexible member 2200 wrapped around the guide groove 2101 is reduced, thereby lowering the battery pack 3000 and reducing the height from the ground.

[0044] The first direction is opposite to the second direction. For example, the first direction is clockwise and the second direction is counterclockwise, or the first direction is counterclockwise and the second direction is clockwise.

[0045] In some embodiments, the radius of the rotating drive disk 2100 is greater than the radius of the power output shaft 1200. At the same angular velocity, the linear speed of rotation of the rotating drive disk 2100 is greater than the linear speed of rotation of the power output shaft 1200. The speed of lifting and lowering of the battery pack 3000 can be adjusted by adjusting the radius of the rotating drive disk 2100 and the power output shaft 1200.

[0046] In some embodiments, for example, a lifting frame 6000 is further included, and the lifting frame 6000 is suitable for connecting with the battery pack 3000, and the flexible member 2200 is connected with the battery pack 3000 through the lifting frame 6000.

[0047] In some embodiments, for example, the lifting frame 6000 is a frame structure with a through hole in the middle, and at least part of the battery pack 3000 is connected to the lifting frame 6000 through the through hole. For example, the lifting frame 6000 can be a rectangular flat plate, and the battery pack 3000 is placed above the lifting frame 6000.

[0048] In some embodiments, the height adjustment device further includes a front cross beam 7100, a rear cross beam 7300, a left longitudinal beam 7400 and a right longitudinal beam 7200, wherein the front cross beam 7100, the rear cross beam 7200, the left longitudinal beam 7400 and the right longitudinal beam 7200 are connected to form a U-shaped structure, the front cross beam 7100 and the rear cross beam 7300 are spaced apart in the vehicle length direction, and the left longitudinal beam 7400 and the rear longitudinal beam 7200 are spaced apart in the vehicle width direction; the projection of the lifting frame 6000 on the vehicle height at least partially overlaps with the projection of the U-shaped structure on the vehicle height, and by way of example, the projection of the lifting frame 6000 on the vehicle height may be greater than or less than the projection of the U-shaped structure on the vehicle height.

[0049] In some embodiments, the height adjustment device also includes a pulley 5000, which is rotatably connected to the front beam 7100 or the rear beam 7300; the flexible member 2200 changes its extension direction by winding around the pulley 5000, thereby changing the force transmission direction, and the battery pack 3000 is subjected to a force in the vehicle height direction.

[0050] In some embodiments, the height adjustment device further includes a telescopic frame 4000, the telescopic frame 4000 includes a telescopic portion 4100 and a connecting portion 4200, the first end of the connecting portion 4200 is rotatably connected to the second end of the telescopic portion 4100, the first end of the telescopic portion 4100 is rotatably connected to the front crossbeam 7100 and the rear crossbeam 7300, and the second end of the connecting portion 4200 is rotatably connected to the lifting frame 6000;

[0051] Among them, the telescopic part 4100 is constructed to have a variable length in the vehicle height direction. For example, when the lifting frame 6000 rises to lift the battery pack 3000, the telescopic frame 4000 is subjected to pressure and its height in the vehicle height direction is reduced. When the lifting frame 6000 descends and drives the battery pack 3000 to descend, the height of the telescopic frame 4000 in the vehicle height direction increases.

[0052] In some embodiments, the telescopic portion 4100 includes a first link 4110 and a second link 4120, the first link 4110 and the second link 4120 are rotatably connected to form an X-shaped structure; the first end 4111 of the first link is rotatably connected to the front crossbeam 7100; the first end 4121 of the second link is rotatably connected to the rear crossbeam 7300;

[0053] The connecting portion 4200 includes a third connecting rod 4210 and a fourth connecting rod 4220, wherein the first end 4211 of the third connecting rod is rotatably connected to the second end 4122 of the second connecting rod 4120, and the second end 4212 of the third connecting rod is rotatably connected to the lifting frame 6000; the first end 4221 of the fourth connecting rod is rotatably connected to the second end 4112 of the first connecting rod, and the second end 4222 of the fourth connecting rod is rotatably connected to the lifting frame 6000.

[0054] The telescopic frame 4000 limits the movement of the lifting frame 6000 in the vehicle length and vehicle width directions, so that the battery pack 3000 does not shake in the vehicle length and vehicle width directions.

[0055] In some embodiments, the telescopic frame 4000 includes a first telescopic frame 8100 and a second telescopic frame 8200 spaced apart in the width direction of the vehicle, wherein the first telescopic frame 8100 is connected to the first end of the front cross beam 7100 and the first end of the rear cross beam 7300, and the second telescopic frame 8200 is connected to the second end of the front cross beam 7100 and the second end of the rear cross beam 7300.

[0056] The first end of the front beam 7100 and the first end of the rear beam 7300 are at one end of the motor 1100 , and the second end of the front beam 7100 and the second end of the rear beam 7300 are at the other end of the motor 1100 .

[0057] In some embodiments, the power source 1000 further includes a motor 1100 to provide power.

[0058] The power output shaft 1200 includes a first power output shaft 1210 and a second power output shaft 1220, and the rotating drive disk 2100 includes a first rotating drive disk 2210 and a second rotating drive disk 2120; one end of the first power output shaft 1210 is connected to the first end of the motor 1100, and the other end of the first power output shaft 1210 is connected to the first rotating drive disk 2210, one end of the second power output shaft 1220 is connected to the second end of the motor 1100, and the other end of the second power output shaft 1220 is connected to the second rotating drive disk 2120. For example, the central axis of the first rotating drive shaft, the central axis of the motor 1100, and the central axis of the second rotating drive shaft can be arranged on the same straight line, so that the battery pack 3000 can be better and more smoothly raised.

[0059] In some embodiments, the flexible member 2200 includes a first flexible member 2210 and a second flexible member 2220, and the pulley 5000 includes a first pulley 5100, a second pulley 5200, a third pulley 5300 and a fourth pulley 5400; the first pulley 5100 is connected to the first end of the front beam 7100, the second pulley 5200 is connected to the first end of the rear beam 7300, the third pulley 5300 is connected to the second end of the rear beam 7300, and the fourth pulley 5400 is connected to the second end of the front beam 7100;

[0060] In the vehicle length direction, the first rotating drive disk 2210 is located between the first pulley 5100 and the second pulley 5200; in the vehicle length direction, the second rotating drive disk 2120 is located between the third pulley 5300 and the fourth pulley 5400; the first flexible member 2210 is wound around the first rotating drive disk 2210, the first pulley 5100 and the second pulley 5200, and the second flexible member 2220 is wound around the second rotating drive disk 2120, the third pulley 5300

[0061] and a fourth pulley 5400 .

[0062] One end of the first flexible member 2210 that is extended after being wound around the first rotation driving disk 2210 is wound around the first pulley 5100 , and the other end is wound around the second pulley 5200 .

[0063] One end of the second flexible member 2220 that is extended after being wound around the second rotation driving disk 2120 is wound around the third pulley 5300 , and the other end is wound around the fourth pulley 5400 .

[0064] In a second aspect, the embodiment of the present application provides a vehicle 2, wherein the vehicle 2 includes the height adjustment device 3 and the battery pack 3000 and Figure 4The frame shown in the figure includes a front section module 11, a middle section module 12 and a rear section module 13, the front section module is provided with a first mounting portion 111 at one end close to the middle section module 12, the rear section module is provided with a second mounting portion 131 at one end close to the middle section module 12, the height adjustment device 3 is provided on the middle section module 12, the first mounting portion 111 is connected to one end of the left longitudinal beam 7400 and one end of the right longitudinal beam 7200, the second mounting portion 131 is connected to one end of the left longitudinal beam 7400 and one end of the right longitudinal beam 7200, and the first mounting portion 111 and the second mounting portion 131 are respectively located on both sides of the motor.

[0065] The height adjustment device 3 is connected to the battery pack 3000, and the height adjustment device 3 includes a power source 1000 and a transmission mechanism 2000; the transmission mechanism 2000 is connected to the power source 1000; the power source 1000 is suitable for being connected to a vehicle, and the transmission mechanism 2000 is suitable for being connected to the battery pack 3000; the power source 1000 drives the transmission mechanism 2000 so that the battery pack 3000 can adjust its ground clearance in the vehicle height direction. When the road condition is smooth, the ground clearance of the battery pack 3000 can be lowered to improve the driving stability of the vehicle. When the road condition is bumpy, the transmission mechanism 2000 drives the battery pack 3000 to rise to increase the ground clearance of the battery pack 3000, effectively reducing the risk of the battery pack 3000 hitting the ground, avoiding safety problems caused by damage to the battery pack 3000, and better protecting the battery pack 3000 and driving safety.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0067] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

[0068] Unless otherwise defined, the technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art in the technical field of this application. The terms used herein are only for describing specific implementation purposes and are not intended to limit this application. Terms such as "setting" appearing in this article can mean that one component is directly attached to another component, or that one component is attached to another component through an intermediate. Features described in this article in one embodiment may be applied to another embodiment alone or in combination with other features, unless the feature is not applicable in the other embodiment or otherwise specified.

[0069] The present application has been described through the above-mentioned embodiments, but it should be understood that the above-mentioned embodiments are only for the purpose of example and description, and are not intended to limit the present application to the described embodiments. It can be understood by those skilled in the art that more variations and modifications can be made according to the teachings of the present application, and these variations and modifications all fall within the scope of protection claimed in the present application.

Claims

1. A height adjustment device, characterized in that: It includes a power source and a transmission mechanism, wherein the transmission mechanism is connected to the power source; the power source is suitable for being connected to a vehicle, and the transmission mechanism is suitable for being connected to a battery pack; the power source drives the transmission mechanism to move the battery pack in the height direction of the vehicle.

2. The height adjustment device according to claim 1, characterized in that: The transmission mechanism comprises a flexible member, one end of which is connected to a power source, and the other end of which is suitable for connecting to a battery pack to drive the battery pack to move.

3. The height adjustment device according to claim 2, characterized in that: The power source includes a power output shaft; the transmission mechanism also includes a rotating drive disk, which is connected to the power output shaft and is also connected to the flexible member so that the flexible member can wrap around the rotating drive disk in the circumferential direction of the rotating drive disk.

4. The height adjustment device according to claim 3, characterized in that: The rotating drive disk is provided with a guide groove in the circumferential direction; when the rotating drive disk moves along a first direction, the flexible member is wound around the guide groove, and when the rotating drive disk moves along a second direction, the flexible member is released from the guide groove.

5. The height adjustment device according to claim 4, characterized in that: The radius of the rotary drive disc is greater than the radius of the power output shaft.

6. The height adjustment device according to claim 5, characterized in that: It also includes a lifting frame, which is suitable for connecting with a battery pack, and the flexible member is connected with the battery pack through the lifting frame.

7. The height adjustment device according to claim 6, characterized in that: The lifting frame is a frame structure with a through hole in the middle, and at least part of the battery pack is connected to the lifting frame at a position passing through the through hole.

8. The height adjustment device according to claim 7, characterized in that: It also includes a front crossbeam, a rear crossbeam, a left longitudinal beam and a right longitudinal beam, wherein the front crossbeam, the rear crossbeam, the left longitudinal beam and the right longitudinal beam are connected to form a U-shaped structure; a projection of the lifting frame at the vehicle height at least partially overlaps with a projection of the U-shaped structure at the vehicle height.

9. The height adjustment device according to claim 8, characterized in that: It also includes a pulley, which is rotatably connected to the front crossbeam or the rear crossbeam; the flexible member changes its extension direction by winding around the pulley.

10. The height adjustment device according to claim 9, characterized in that: It also includes a telescopic frame, which includes a telescopic part and a connecting part, wherein the first end of the connecting part is rotatably connected to the second end of the telescopic part, the first end of the telescopic part is rotatably connected to the front cross beam and the rear cross beam, and the second end of the connecting part is rotatably connected to the lifting frame; wherein the telescopic part is constructed to have a variable length in the vehicle height direction.

11. The height adjustment device according to claim 10, characterized in that: The telescopic part includes a first connecting rod and a second connecting rod, and the first connecting rod and the second connecting rod are rotatably connected to form an X-shaped structure; the first end of the first connecting rod is rotatably connected to the front crossbeam; the first end of the second connecting rod is rotatably connected to the rear crossbeam; The connecting part includes a third connecting rod and a fourth connecting rod, wherein the first end of the third connecting rod is rotatably connected to the second end of the second connecting rod, and the second end of the third connecting rod is rotatably connected to the lifting frame; the first end of the fourth connecting rod is rotatably connected to the second end of the first connecting rod, and the second end of the fourth connecting rod is rotatably connected to the lifting frame.

12. The height adjustment device according to claim 11, characterized in that: The telescopic frame includes a first telescopic frame and a second telescopic frame spaced apart in the vehicle width direction, wherein the first telescopic frame is connected to a first end of the front cross beam and a first end of the rear cross beam, and the second telescopic frame is connected to a second end of the front cross beam and a second end of the rear cross beam.

13. The height adjustment device according to claim 12, characterized in that: The power source also includes a motor, the power output shaft includes a first power output shaft and a second power output shaft, and the rotating drive disk includes a first rotating drive disk and a second rotating drive disk; one end of the first power output shaft is connected to the first end of the motor, and the other end of the first power output shaft is connected to the first rotating drive disk, one end of the second power output shaft is connected to the second end of the motor, and the other end of the second power output shaft is connected to the second rotating drive disk.

14. The height adjustment device according to claim 13, characterized in that: The flexible member includes a first flexible member and a second flexible member, and the pulley includes a first pulley, a second pulley, a third pulley and a fourth pulley; the first pulley is connected to the first end of the front cross beam, the second pulley is connected to the first end of the rear cross beam, the third pulley is connected to the first end of the rear cross beam, The pulley is connected to the second end of the rear cross beam, and the fourth pulley is connected to the second end of the front cross beam; In the vehicle length direction, the first rotating drive disc is located between the first pulley and the second pulley, and the second rotating drive disc is located between the third pulley and the fourth pulley; The first flexible member is wound around the first rotation driving disk, the first pulley and the second pulley, and the second flexible member is wound around the second rotation driving disk, the third pulley and the fourth pulley.

15. A vehicle, characterized in that: The vehicle comprises the height adjustment device as described in any one of claims 1 to 14 above, and the vehicle further comprises a battery pack, and the height adjustment device is connected to the battery pack.

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