Whole vehicle lifting appliance and hoisting system

Abstract

The application relates to a whole vehicle lifting appliance and a hoisting system. The whole vehicle lifting appliance is used for hoisting a vehicle body. The vehicle body comprises a front end part, a middle part and a rear end part arranged in sequence along a first direction. The whole vehicle lifting appliance comprises a main frame and a hoisting assembly. The main frame is arranged opposite to the vehicle body along a second direction. The hoisting assembly comprises a plurality of connecting pieces arranged at intervals on the main frame. The plurality of connecting pieces are connected with the front end part, the middle part and the rear end part respectively. Each connecting piece is configured to be movable relative to the main frame along the second direction, so that each connecting piece can be connected with different positions of the vehicle body along the second direction. This enables the plurality of connecting pieces to be connected with positions close to the centers of gravity of the parts when connected with the vehicle body, so that the vehicle body can be fully balanced during hoisting, and the vehicle body can be smoothly installed subsequently.

Description

Technical Field

[0001] This application relates to the field of automotive manufacturing technology, and in particular to a vehicle lifting device and lifting system. Background Technology

[0002] The main structure of the vehicle body can be divided into three parts: the front, middle, and rear sections. During vehicle production, the body needs to be lifted and transported. Lifting systems typically use a vehicle-mounted crane to connect the various parts of the body to an overhead crane, which then lifts the body. However, traditional lifting systems may struggle to keep the vehicle body level during transport, potentially causing it to tip over or fail to land in the intended position. Summary of the Invention

[0003] Therefore, it is necessary to provide a vehicle lifting tool and lifting system to address the problem that traditional lifting systems may have difficulty keeping the vehicle body level during lifting operations.

[0004] According to a first aspect of this application, a vehicle lifting device is provided for lifting a vehicle body, the vehicle body comprising a front end portion, a middle portion, and a rear end portion arranged sequentially along a first direction, the vehicle lifting device comprising:

[0005] The main frame, for connection to the overhead crane, and disposed opposite to the vehicle body along the second direction; and

[0006] The hoisting assembly includes a plurality of connectors spaced apart from the main frame, the plurality of connectors being used to connect to the front end portion, the middle portion and the rear end portion respectively;

[0007] Each of the connectors is configured to move relative to the main frame along the second direction so that the vehicle body, which is lifted by the plurality of connectors, can be in a horizontal position; the first direction and the second direction are perpendicular to each other.

[0008] In one embodiment, the hoisting assembly further includes:

[0009] Multiple fixed pulleys are installed at intervals on the main frame;

[0010] Multiple wire rope clamps are provided, each corresponding to one of the multiple fixed pulleys, and each wire rope clamp is connected to its corresponding fixed pulley; and

[0011] A hoisting rope is provided on the main frame. One end of the hoisting rope is connected to a connector, and the other end passes over multiple fixed pulleys and is connected to another connector. The two ends of the hoisting rope are respectively movably passed through the corresponding wire rope clamps along the second direction.

[0012] In one embodiment, the main frame includes two fixed longitudinal beams extending along the first direction and spaced apart from each other along a third direction; a plurality of fixed pulleys and a plurality of wire rope clamps are respectively spaced apart on the two fixed longitudinal beams;

[0013] The plurality of connectors constitute two connector groups, and the two connector groups are respectively disposed on the two fixed longitudinal beams; each connector group includes a first connector, a second connector and a third connector; the hoisting assembly includes two hoisting ropes corresponding to the fixed longitudinal beams, and each hoisting rope is respectively connected to the first connector, the second connector and the third connector on the same side along the third direction;

[0014] The first direction, the second direction, and the third direction are perpendicular to each other.

[0015] In one embodiment, the hoisting assembly further includes a movable crossbeam extending along the third direction, and two second connectors spaced apart from the movable crossbeam along the third direction;

[0016] The movable crossbeam is provided with two connecting pulleys at intervals along the third direction on one side facing the main frame. Each connecting pulley defines a passage between itself and the movable crossbeam, and the suspension rope is movably threaded through the corresponding passage.

[0017] In one embodiment, the dimension of the movable crossbeam in the third direction is greater than the dimension of the main frame in the third direction.

[0018] In one embodiment, the connector includes a hook and a sling, the hook including a metal hook and / or a polyurethane hook;

[0019] The two ends of the sling are respectively connected to the main frame, and the two connection positions of the sling and the main frame are relatively spaced apart along a third direction;

[0020] The first direction, the second direction, and the third direction are perpendicular to each other.

[0021] In one embodiment, the hoisting assembly further includes two turnbuckles, one end of which is connected to different ends of the sling, and the other end of which is connected to the main frame.

[0022] In one embodiment, the vehicle lifting device further includes a counterweight mounted on the main frame, the counterweight being configured to keep the main frame horizontal when the lifting assembly is not connected to the vehicle body.

[0023] In one embodiment, the main frame is provided with a plurality of mounting points spaced apart along the first direction, and each mounting point can be used to install the connector.

[0024] According to a second aspect of this application, a lifting system is also provided, the lifting system comprising the vehicle-mounted lifting device as described above, the vehicle-mounted lifting device comprising:

[0025] The main frame, for connection to the overhead crane, and disposed opposite to the vehicle body along the second direction; and

[0026] The hoisting assembly includes a plurality of connectors spaced apart from the main frame, the plurality of connectors being used to connect to the front end portion, the middle portion and the rear end portion respectively;

[0027] Each of the connectors is configured to move relative to the main frame along the second direction so that the vehicle body, which is lifted by the plurality of connectors, can be in a horizontal position; the first direction and the second direction are perpendicular to each other.

[0028] The weight and structure of different parts of a vehicle body vary, resulting in different centers of gravity. This often leads to imbalances when using a vehicle-mounted crane with the same structure to lift the vehicle body. Therefore, in this application's solution, the vehicle-mounted crane mounts a lifting assembly on a main frame, which is positioned relative to the vehicle body along a second direction. Furthermore, the lifting assembly is connected to the front, middle, and rear sections of the vehicle body via multiple connectors. Each connector can move relative to the main frame along the second direction, allowing it to connect to different locations on the vehicle body in that direction. This ensures that each connector connects to a location close to the center of gravity of its respective part, maintaining the vehicle body's balance during lifting and facilitating subsequent installation. Attached Figure Description

[0029] Figure 1 This is a structural schematic diagram of the vehicle-mounted lifting device proposed in this application.

[0030] Figure 2 for Figure 1 A schematic diagram of the structure of the hoisting assembly.

[0031] Figure 3 for Figure 2 A schematic diagram of the middle part of the structure.

[0032] Figure 4 for Figure 1 A schematic diagram of the main framework.

[0033] Explanation of icon numbers:

[0034] label name label name 100 Vehicle lifting equipment 1 Main framework 11 Fixed longitudinal beam 2 Lifting components 21 connector 211 First connector 212 Second connector 213 Third connector 21a hook 21b suspenders 22 Fixed pulley 23 Wire rope clamp 24 sling 25 Movable crossbeam 26 Connecting pulleys 27 Flower basket screws 3 counterweight X First direction Y Second direction Z Third direction Detailed Implementation

[0035] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0036] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0037] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0038] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0040] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0041] The main structure of the vehicle body can be divided into three parts: the front, middle, and rear sections. During vehicle production, the body needs to be lifted and transported. Lifting systems typically use a vehicle-mounted crane to connect the various parts of the body to an overhead crane, which then lifts the body. However, traditional lifting systems may struggle to keep the vehicle body level during transport, potentially causing it to tip over or fail to land in the intended position.

[0042] The inventors of this application discovered through research that different parts of a vehicle body have different weights and structures, resulting in different center of gravity positions for each part. This makes it difficult to maintain balance when using a vehicle crane with the same structure to lift the vehicle body.

[0043] In view of this, this application proposes a vehicle lifting device to solve the problem that traditional lifting systems may have difficulty keeping the vehicle body in a horizontal position during lifting operations. Figures 1 to 4 This is a structural schematic diagram of one embodiment of the vehicle lifting device proposed in this application.

[0044] Please see Figures 1 to 2The vehicle lifting device 100 proposed in this application is used for lifting vehicle bodies, the vehicle body including a front end, a middle end, and a rear end, arranged sequentially along a first direction X. The vehicle lifting device 100 includes a main frame 1 and a lifting assembly 2. The main frame 1 is used to connect to an overhead crane and is arranged opposite to the vehicle body along a second direction Y. The lifting assembly 2 includes a plurality of connectors 21 spaced apart from the main frame 1, the plurality of connectors 21 being used to connect to the front end, the middle end, and the rear end, respectively. Each connector 21 is configured to be movable relative to the main frame 1 along the second direction Y, so that the vehicle body lifted by the plurality of connectors 21 can be in a horizontal state. The first direction X and the second direction Y are perpendicular to each other.

[0045] In this application, the first direction X and the second direction Y are relative directions. Specifically, the first direction X can be defined as the length direction of the vehicle body, and the second direction Y can be defined as the relative direction between the main frame 1 and the vehicle body.

[0046] The weight and structure of different parts of a vehicle body vary, resulting in different centers of gravity. This often leads to imbalance when the vehicle body is lifted using a single, identical structure with the same crane 100. Therefore, in this application's solution, the crane 100 mounts a lifting assembly 2 on a main frame 1, which is positioned relative to the vehicle body along the second direction Y. Furthermore, the lifting assembly 2 is connected to the front, middle, and rear sections of the vehicle body via multiple connectors 21. Each connector 21 can move relative to the main frame 1 along the second direction Y, allowing it to connect to different positions on the vehicle body in the second direction Y. This ensures that each connector 21 connects to a position close to the center of gravity of its respective part, maintaining the vehicle body's balance during lifting and facilitating subsequent installation.

[0047] In some embodiments, the hoisting assembly 2 further includes a plurality of fixed pulleys 22, a plurality of wire rope clamps 23, and a hoisting rope 24. The plurality of fixed pulleys 22 are spaced apart and installed on the main frame 1. The plurality of wire rope clamps 23 are arranged in a one-to-one correspondence with the plurality of fixed pulleys 22, and each wire rope clamp 23 is connected to its corresponding fixed pulley 22. The hoisting rope 24 is disposed on the main frame 1, with one end connected to a connector 21, and the other end passing over the plurality of fixed pulleys 22 and connected to another connector 21. Both ends of the hoisting rope 24 are respectively movably threaded through the corresponding wire rope clamps 23 along the second direction Y.

[0048] When it is necessary to adjust the distance between a connector 21 and the main frame 1, it is only necessary to adjust the length of the hoisting rope 24 between the connector 21 and the corresponding wire rope clamp 23. Specifically, the hoisting rope 24 has sufficient redundancy. When the distance between the connector 21 and the main frame 1 needs to be increased, the operator only needs to loosen the corresponding wire rope clamp 23, increase the length of the hoisting rope 24 passing through the wire rope clamp 23, and then tighten the wire rope clamp 23 to complete the adjustment. When the distance between the connector 21 and the main frame 1 needs to be decreased, the operator only needs to loosen the corresponding wire rope clamp 23, decrease the length of the hoisting rope 24 passing through the wire rope clamp 23, and then tighten the wire rope clamp 23 to complete the adjustment.

[0049] In addition, the hoisting assembly 2 also includes multiple fixed pulleys 22, which make the hoisting rope 24 more smoothly adjusted in length and more convenient for the operator.

[0050] Please see Figure 1 and Figure 4 In some embodiments, the main frame 1 includes two fixed longitudinal beams 11 extending along a first direction X and spaced apart from each other along a third direction Z. Multiple fixed pulleys 22 and multiple wire rope clamps 23 are respectively spaced apart on the two fixed longitudinal beams 11. Multiple connectors 21 constitute two sets of connectors 21, each set of connectors 21 being respectively disposed on the two fixed longitudinal beams 11. Each set of connectors 21 includes a first connector 211, a second connector 212, and a third connector 213. The hoisting assembly 2 includes two hoisting ropes 24 corresponding to the fixed longitudinal beams 11. Each hoisting rope 24 is respectively connected to the first connector 211, the second connector 212, and the third connector 213 on the same side along the third direction Z. The first direction X, the second direction Y, and the third direction Z are mutually perpendicular.

[0051] In practical applications, if the lifting assembly 2 is connected to the front end of the vehicle body via a single connector 21, the vehicle body may still be unstable, as may other parts of the vehicle body. Therefore, in this embodiment, multiple connectors 21 constitute two sets of connectors 21, and each set of connectors 21 includes a first connector 211, a second connector 212, and a third connector 213. The first connector 211 is used to connect to the front end of the vehicle body, the second connector 212 can connect to the middle part of the vehicle body, and the third connector 213 can connect to the rear end of the vehicle body. In other words, the lifting assembly 2 can be equipped with multiple connectors 21 for each part of the vehicle body, thereby making the lifting assembly 2 more stable during lifting. In fact, in the embodiments described in this application, the lifting assembly 2 has four connectors 21 connected to the front end of the vehicle body, another four connected to the middle part of the vehicle body, and finally two connectors 21 connected to the rear end of the vehicle body, thus further increasing the stability of the vehicle body during lifting.

[0052] In addition, the two connecting pieces 21 are set on different fixed longitudinal beams 11, and the two fixed longitudinal beams 11 are set at relative intervals along the third direction Z. Therefore, the connecting pieces 21 in the two connecting pieces 21 can be set more evenly on the main frame 1, which makes the connection position of multiple connecting pieces 21 with the vehicle body more even, thereby further increasing the stability of the vehicle body.

[0053] In addition, in practical applications, different vehicle models often have some common connection points. Therefore, the connector 21 can also include a fourth connector, which is connected to the main frame 1 by a lifting rope 24. However, the lifting rope 24 connecting the fourth connector to the main frame 1 is of a fixed length and does not need to be adjusted, which makes the vehicle lifting device 100 more convenient to use.

[0054] Please see Figures 1 to 3 In some embodiments, the hoisting assembly 2 further includes a movable crossbeam 25 extending along a third direction Z, with two second connectors 212 spaced apart along the third direction Z on the movable crossbeam 25. Two connecting pulleys 26 are spaced apart along the third direction Z on the side of the movable crossbeam 25 facing the main frame 1, each connecting pulley 26 defining a passageway with the movable crossbeam 25, and the hoisting rope 24 is movably threaded through the corresponding passageway.

[0055] In practical applications, the movable crossbeam 25 is connected to the main frame 1 via two lifting ropes 24. This makes the movable crossbeam 25 relatively stable, generally preventing rotation and swaying, which further increases the stability of the vehicle body during lifting. Furthermore, the lifting ropes 24 pass through a channel between the connecting pulley 26 and the movable crossbeam 25. Therefore, when adjusting the distance between the main frame 1 and the movable crossbeam 25, the lifting ropes 24 can move smoothly through the channel via the connecting pulley 26, simplifying the operator's work.

[0056] The width of the middle section of most vehicle bodies is greater than that of the front and rear sections, meaning that the middle section of the vehicle body has a larger dimension in the third direction Z. Therefore, in some embodiments, the dimension of the movable crossbeam 25 in the third direction Z is greater than the dimension of the main frame 1 in the third direction Z. In this case, the two second connectors 212 on the movable crossbeam 25 can be spaced further apart in the third direction Z, allowing the two second connectors 212 to connect to various parts of the middle section of the vehicle body without increasing the dimension of the main frame 1 in the third direction Z, thus saving manufacturing costs.

[0057] Please see Figures 1 to 2 In one embodiment of this application, the connector 21 includes a hook 21a and a sling 21b. The hook 21a is a metal hook 21a. Both ends of the sling 21b are connected to the main frame 1, and the two connection positions of the sling 21b and the main frame 1 are spaced apart along the third direction Z. The first direction X and the second direction Y are perpendicular to the third direction Z.

[0058] The hook 21a can be connected to the lifting point on the vehicle body, while the sling 21b can be fitted onto the bottom of the vehicle body to support its weight. The metal hook 21a can bear a large weight and has strong versatility. However, during actual lifting, some areas of the vehicle body may have paint, and using the metal hook 21a may scratch the paint. Therefore, in another embodiment of this application, the hook 21a also includes a polyurethane hook 21a, which can prevent the vehicle body from being scratched when connected to it. Of course, the vehicle lifting device 100 can also be equipped with both metal hooks 21a and polyurethane hooks 21a, which can be adjusted and replaced according to actual needs.

[0059] In some embodiments, the hoisting assembly 2 further includes two turnbuckles 27, one end of which is connected to different ends of the sling 21b, and the other end is connected to the main frame 1.

[0060] Since the length of the sling 21b is difficult to adjust, the lifting assembly 2 connects the main frame 1 and the sling 21b via turnbuckles 27. When the distance between the sling 21b and the vehicle body needs to be adjusted, the operator can adjust the turnbuckles 27 to change the distance between the main frame 1 and the sling 21b, thereby moving the sling 21b closer to or further away from the main frame 1.

[0061] The different parts of the vehicle body have different weights and structures, resulting in different center of gravity positions for each part. Therefore, the multiple connectors 21 are generally not equidistant, which can cause the main frame 1 to tip over when the vehicle crane 100 is not connected to the vehicle body, making connection between the main frame 1 and the vehicle body difficult. Therefore, in some embodiments, the vehicle crane 100 also includes a counterweight 3 installed on the main frame 1. The counterweight 3 is configured to keep the main frame 1 horizontal when the lifting assembly 2 is not connected to the vehicle body, facilitating connection between the vehicle crane 100 and the vehicle body.

[0062] Please see Figure 1 In some embodiments, the main frame 1 is provided with multiple mounting points spaced apart along the first direction X, and each mounting point can be used to install the connector 21. When the whole vehicle is used to lift different models of the vehicle body, the positions of the lifting points on the vehicle body may be different. The multiple connectors 21 can be installed at different mounting points to adjust their own positions, thereby connecting with the lifting points at different positions, so that the whole vehicle crane 100 can lift the vehicle body of different models.

[0063] This application also proposes a lifting system, including the vehicle lifting device 100 as described in any of the above embodiments. The lifting system also includes an overhead crane connected to the vehicle lifting device 100, so that after the connecting piece 21 of the vehicle lifting device 100 is connected to the vehicle body, the overhead crane can lift the vehicle body. In addition, the lifting system can also lift other structures, in which case only the structure of the lifting device needs to be replaced and adjusted accordingly.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A vehicle lifting device for lifting and transporting vehicle bodies, the vehicle body comprising a front end portion, a middle portion, and a rear end portion arranged sequentially along a first direction, characterized in that... The vehicle lifting device includes: The main frame, for connection to the overhead crane, and disposed opposite to the vehicle body along the second direction; and The hoisting assembly includes a plurality of connectors spaced apart from the main frame, the plurality of connectors being used to connect to the front end portion, the middle portion and the rear end portion respectively; Each of the connectors is configured to move relative to the main frame along the second direction so that the vehicle body, which is lifted by the plurality of connectors, can be in a horizontal position; the first direction and the second direction are perpendicular to each other; The hoisting assembly also includes multiple fixed pulleys, multiple wire rope clamps, and a hoisting rope. The multiple fixed pulleys are installed at intervals on the main frame. The multiple wire rope clamps are arranged one-to-one with the multiple fixed pulleys, and each wire rope clamp is connected to the corresponding fixed pulley. The hoisting rope is disposed on the main frame, one end of the hoisting rope is connected to a connector, and the other end passes around the multiple fixed pulleys and is connected to another connector. The two ends of the hoisting rope are respectively movably passed through the corresponding wire rope clamps along the second direction. The plurality of connectors constitute two connector groups, and the two connector groups are respectively disposed on two fixed longitudinal beams. Each connector group includes a first connector, a second connector, and a third connector. The first connector is connected to the front end of the vehicle body, the second connector is connected to the middle part of the vehicle body, and the third connector is connected to the rear end of the vehicle body. The connector further includes a fourth connector, which is connected to the main frame via the suspension rope; the fourth connector and the suspension rope of the main frame are of fixed length. The hoisting assembly also includes a movable crossbeam extending along a third direction, with two second connectors spaced apart along the third direction on the movable crossbeam; the movable crossbeam is connected to the main frame via two hoisting ropes; The connector includes a hook and a sling; the hook is connected to a lifting point on the vehicle body, and the sling is fitted onto the bottom of the vehicle body; the lifting assembly also includes two turnbuckles, one end of which is connected to different ends of the sling, and the other end is connected to the main frame.

2. The vehicle lifting device according to claim 1, characterized in that, The main frame includes two fixed longitudinal beams extending along the first direction and spaced apart from each other along a third direction; a plurality of fixed pulleys and a plurality of wire rope clamps are respectively spaced apart on the two fixed longitudinal beams; The hoisting assembly includes two hoisting ropes corresponding to the fixed longitudinal beam, and each hoisting rope is respectively connected to the first connector, the second connector and the third connector on the same side along the third direction; The first direction, the second direction, and the third direction are perpendicular to each other.

3. The vehicle lifting device according to claim 2, characterized in that, The movable crossbeam is provided with two connecting pulleys at intervals along the third direction on one side facing the main frame. Each connecting pulley defines a passage between itself and the movable crossbeam, and the suspension rope is movably passed through the corresponding passage.

4. The vehicle lifting device according to claim 3, characterized in that, The dimension of the movable crossbeam in the third direction is greater than the dimension of the main frame in the third direction.

5. The vehicle lifting device according to claim 1, characterized in that, The connector includes a hook and a sling, and the hook includes a metal hook and / or a polyurethane hook. The two ends of the sling are respectively connected to the main frame, and the two connection positions of the sling and the main frame are spaced apart from each other along a third direction.

6. The vehicle lifting device according to claim 1, characterized in that, It also includes a counterweight installed on the main frame, the counterweight being configured to keep the main frame horizontal when the lifting assembly is not connected to the vehicle body.

7. The vehicle lifting device according to claim 1, characterized in that, The main frame is provided with multiple mounting points at intervals along the first direction, and each mounting point can be used to install the connector.

8. A hoisting system, characterized in that, Includes the vehicle lifting device as described in any one of claims 1 to 7.

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