CN220148991U - Battery package hoist device and lifting device - Google Patents

Abstract

The utility model discloses a battery pack lifting device and lifting equipment, comprising a movable frame, a telescopic driving mechanism, a butt-joint lifting appliance and two lifting assemblies, wherein the telescopic driving mechanism comprises a telescopic driving piece and a sliding seat, the two lifting assemblies are arranged at intervals and respectively comprise a first lifting wheel, a second lifting wheel, a turning wheel, a first lifting rope and a second lifting rope, the first lifting wheel and the turning wheel are respectively arranged at a first end of the movable frame, the second lifting wheel is arranged at a second end of the movable frame, the first ends of the first lifting rope and the second lifting rope are respectively connected with the sliding seat, the second ends are respectively guided to the first lifting wheel in a one-to-one correspondence manner and bypass the turning wheel to guide the second lifting wheel, and the butt-joint lifting appliance is respectively connected with the second ends of the first lifting rope and the second lifting rope. Through the setting up of diversion wheel, place flexible driving piece between first hanging wheel and the second hanging wheel, can satisfy the flexible stroke of flexible driving piece under the whole external dimension limited circumstances of device, increased the lifting height.

Description

Battery package hoist device and lifting device

Technical Field

The utility model belongs to the technical field of hoisting, and particularly relates to a battery pack hoisting mechanism and hoisting equipment.

Background

In recent years, as automobile emission regulations become more and more strict, pure electric commercial vehicles are widely used. However, due to the development of the battery technology at the present stage, the electric commercial vehicle has pain points of short endurance mileage, long charging time, inconvenient charging and the like. The battery pack lifting mechanism is needed in the process of changing the power.

In order to more stably hoist cuboid objects such as battery packs and containers, a four-point hoist is generally required, one end of each of four groups of steel wire ropes is usually fixed on a fixing plate which can slide along a rail, the other end of each of the four groups of steel wire ropes is fixed on four hoisting points on a hoist, the fixing plate is driven to move through an oil cylinder, each group of steel wire ropes is turned through only one pulley, so that synchronous lifting of the four groups of steel wire ropes is realized, the fixing plate can only be arranged on the outer sides of the four groups of steel wire ropes, the stroke of the oil cylinder is limited under the condition of limited overall appearance size, the lifting stroke of the hoist is small, and the adaptability of the hoist is influenced.

Disclosure of Invention

Aiming at the defects or shortcomings in the prior art, the utility model provides a battery pack hoisting device and hoisting equipment, and aims to solve the technical problem that the lifting stroke of a lifting appliance is smaller due to limited telescopic stroke of an oil cylinder due to arrangement defects of the position of the oil cylinder.

In order to achieve the above object, the utility model provides a battery pack lifting device and a lifting device, wherein the battery pack lifting device comprises a moving frame, a telescopic driving mechanism, a butt-joint lifting appliance and two lifting components, the telescopic driving mechanism comprises a telescopic driving piece arranged on the moving frame and a sliding seat movably arranged on the moving frame and in driving connection with the telescopic driving piece, the two lifting components are arranged at intervals of the telescopic driving piece and respectively comprise a first lifting wheel, a second lifting wheel, a turning wheel, a first lifting rope and a second lifting rope, the first lifting wheel and the turning wheel are arranged at a first end of the moving frame, the second lifting wheel is arranged at a second end of the moving frame, the first end of the first lifting rope is connected with the sliding seat, the second end of the second lifting rope is guided to the first lifting wheel, the first end of the second lifting rope is connected with the sliding seat, the second end of the second lifting rope bypasses the turning wheel, and the butt-joint lifting appliance is respectively connected with the second ends of the first lifting rope and the second lifting rope and is used for bearing the battery pack.

In the embodiment of the utility model, the butt-joint lifting appliance comprises a lifting frame and a rotary butt-joint assembly, wherein the lifting frame is respectively connected with the second ends of the first lifting rope and the second lifting rope, the rotary butt-joint assembly comprises a butt-joint driving piece arranged on the lifting frame and a first supporting plate rotatably arranged on the lifting frame, and the butt-joint driving piece is used for driving the first supporting plate to outwards rotate and extend out of the lifting frame so as to be inserted into the bottom of a cross beam of the battery pack.

In the embodiment of the utility model, the rotary butt joint assembly further comprises a second supporting plate, a connecting plate and two rotating shafts, wherein the two rotating shafts are oppositely spaced and rotatably arranged on the lifting frame in a penetrating mode, the first supporting plate and the second supporting plate are connected with the lower ends of the two rotating shafts in a one-to-one correspondence mode, the two ends of the connecting plate are movably connected with the upper ends of the two rotating shafts in a one-to-one correspondence mode, the telescopic end of the butt joint driving piece is connected with the middle of the connecting plate in a driving mode, and the telescopic end of the butt joint driving piece is used for stretching and pushing the connecting plate to drive the first supporting plate and the second supporting plate to outwards rotate and extend out of the lifting frame.

In the embodiment of the utility model, both ends of the connecting plate are provided with the strip-shaped holes along the length direction, the upper ends of the two rotating shafts are provided with the connecting arms which extend out of the rotating shafts along the radial direction, and the connecting arms are provided with the pin shafts which penetrate through the strip-shaped holes and can slide in the strip-shaped holes.

In the embodiment of the utility model, the lifting frame is also provided with a guide piece which downwards extends and is used for being inserted into the guide socket of the battery pack.

In the embodiment of the utility model, the number of the rotary butt joint assemblies is two, and the two rotary butt joint assemblies are oppositely arranged on the lifting frame at intervals.

In the embodiment of the utility model, the first hanging wheel and the turning wheel are arranged on one side of the sliding seat, which is arranged towards the telescopic driving piece, and the second hanging wheel is arranged on one side of the sliding seat, which is arranged away from the telescopic driving piece.

In the embodiment of the utility model, the movable frame comprises a frame body and a sliding rail which is arranged on the frame body and is used for movably installing the sliding seat.

In the embodiment of the utility model, the battery pack hoisting device further comprises a positioning assembly, wherein the positioning assembly comprises a positioning sleeve and a positioning rod, one of the positioning sleeve and the positioning rod is arranged at the bottom of the movable frame, the other one of the positioning sleeve and the positioning rod is arranged at the top of the butt-joint hoisting tool, and the positioning rod can be inserted into the positioning sleeve.

In order to achieve the above purpose, the utility model also provides a hoisting device, wherein the hoisting device comprises the battery pack hoisting device.

Through the technical scheme, the battery pack hoisting device provided by the embodiment of the utility model has the following beneficial effects:

when lifting device used above-mentioned battery package hoist device, owing to including moving the frame, flexible actuating mechanism, butt joint hoist and two hoist and mount subassemblies, flexible actuating mechanism includes flexible actuating piece and seat of sliding, two hoist and mount subassembly interval flexible actuating piece settings and all include first hoist and mount wheel, the second hoist and mount wheel, diversion wheel, first hoist and second hoist and mount rope, first hoist and diversion wheel all set up the first end at moving the frame, the second hoist and wheel setting is at the second end of moving the frame, the first end of first hoist and seat of sliding are connected, and the first hoist and wheel of second end direction, the first end and the seat of sliding of second hoist and seat are connected, and the diversion wheel is walked around to the second end direction second hoist and wheel, the butt joint hoist is connected with the second end of first hoist and second hoist and is used for bearing the battery package respectively. The position of the first hanging wheel and the position of the second hanging wheel can be close to the edge of the sliding seat to increase the distance between hanging points, and the arrangement of the telescopic driving piece is changed by additionally arranging the turning wheels, so that the telescopic driving piece is arranged on the movable frame between the first hanging wheel and the second hanging wheel, the telescopic travel of the telescopic driving piece under the condition of limited overall appearance size of the device can be met, and the lifting height is increased.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

The accompanying drawings are included to provide an understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model. In the drawings:

fig. 1 is a schematic view illustrating a structure of a battery pack lifting device according to an embodiment of the present utility model;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic view of the structure of a docking cradle according to an embodiment of the present utility model;

FIG. 4 is an enlarged view of a portion of FIG. 3 at I;

fig. 5 is a schematic view of a portion of a hoisting assembly according to an embodiment of the utility model.

Description of the reference numerals

100. Movable frame 101 frame body

102. Slide rail 200 telescopic driving mechanism

201. Sliding seat of telescopic driving piece 202

300. First hanging wheel of hanging assembly 301

302. Second hanging wheel 303 turning wheel

304. First hoist rope 305 second hoist rope

400. Butt-joint lifting appliance 401 lifting frame

402. Butt joint driving piece of rotary butt joint assembly 403

404. First pallet 405 second pallet

406. Connecting plate 407 rotation shaft

408. Connecting arm with long strip-shaped hole 409

410. Pin 411 guide

500. Positioning sleeve of positioning assembly 501

502. Positioning rod

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for purposes of illustration and explanation only and are not intended to limit the present utility model.

The battery pack lifting device and the lifting equipment according to the present utility model are described below with reference to the accompanying drawings.

As shown in fig. 1, in an embodiment of the present utility model, there is provided a battery pack lifting device, wherein the battery pack lifting device includes:

a moving frame 100;

the telescopic driving mechanism 200 comprises a telescopic driving piece 201 arranged on the movable frame 100 and a sliding seat 202 movably arranged on the movable frame 100 and in driving connection with the telescopic driving piece 201;

the two hoisting assemblies 300 are arranged at intervals, the telescopic driving piece 201 is arranged and comprises a first hoisting wheel 301, a second hoisting wheel 302, a turning wheel 303, a first hoisting rope 304 and a second hoisting rope 305, the first hoisting wheel 301 and the turning wheel 303 are arranged at the first end of the movable frame 100, the second hoisting wheel 302 is arranged at the second end of the movable frame 100, the first end of the first hoisting rope 304 is connected with the sliding seat 202, the second end of the first hoisting rope 304 is guided to the first hoisting wheel 301, the first end of the second hoisting rope 305 is connected with the sliding seat 202, and the second end of the second hoisting rope 303 bypasses the turning wheel 302 to be guided to the second hoisting wheel 302;

the docking spreader 400 is connected to the second ends of the first and second lifting cords 304, 305, respectively, and is used to carry a battery pack.

When the battery pack lifting device is used by the lifting equipment, the lifting equipment comprises the mobile frame 100, the telescopic driving mechanism 200, the butt-joint lifting appliance 400 and the two lifting assemblies 300, wherein the telescopic driving mechanism 200 comprises a telescopic driving piece 201 and a sliding seat 202, the two lifting assemblies 300 are arranged at intervals and respectively comprise a first lifting wheel 301, a second lifting wheel 302, a turning wheel 303, a first lifting rope 304 and a second lifting rope 305, the first lifting wheel 301 and the turning wheel 303 are respectively arranged at the first end of the mobile frame 100, the second lifting wheel 302 is arranged at the second end of the mobile frame 100, the first end of the first lifting rope 304 is connected with the sliding seat 202, the second end of the second lifting rope 305 is guided to the first lifting wheel 301, the first end of the second lifting rope 305 is connected with the sliding seat 202, and the second end of the second lifting rope 303 is guided to the second lifting wheel 302, and the butt-joint lifting appliance 400 is respectively connected with the second ends of the first lifting rope 304 and the second lifting rope 305 and is used for bearing the battery pack. The positions of the first hanging wheel 301 and the second hanging wheel 302 can be set close to the edge of the sliding seat 202 to increase the distance between hanging points, and the arrangement of the telescopic driving piece 201 is changed by adding the direction-changing wheel 303, so that the telescopic driving piece 201 is arranged on the moving frame 100 between the first hanging wheel 301 and the second hanging wheel 302, the telescopic travel of the telescopic driving piece 201 under the condition of limited overall appearance size of the device can be met, and the lifting height is increased. It should be noted that, the battery pack lifting device in the present utility model is not limited to be used for lifting the battery pack, and other lifting devices having a structure similar to that of the battery pack are also supposed to fall within the protection scope of the present utility model.

Referring to fig. 1 and 3, in the embodiment of the present utility model, the docking cradle 400 includes a cradle 401 and a rotating docking assembly 402, the cradle 401 is connected to the second ends of the first and second hoist ropes 304 and 305, respectively, the rotating docking assembly 402 includes a docking driving member 403 provided on the cradle 401 and a first pallet 404 rotatably provided on the cradle 401, and the docking driving member 403 is used to drive the first pallet 404 to extend out of the cradle 401 to be inserted into the bottom of the beam of the battery pack. Specifically, the shape of the battery pack is cuboid, the bracket is installed at the upper end of the battery pack, the bracket comprises two parallel beams, the lifting frame 401 can be lowered between the two beams, and the butt-joint lifting tool 400 is used for bearing the beams. That is, before the docking sling 400 is docked with the battery pack, the first supporting plate 404 is in a state of being screwed into and retracted from the lower side of the lifting frame 401, when the lifting frame 401 of the docking sling 400 is lowered in place, the docking driving piece 403 rotates forward to drive the first supporting plate 404 to rotate, the first supporting plate 404 extends out of the lifting frame 401 and is inserted into the bottom of the cross beam so as to support the battery pack, when the first lifting rope 304 and the second lifting rope 305 hoist the battery pack in place, the docking driving piece 403 is driven to rotate reversely to drive the first supporting plate 404 to rotate reversely, and the first supporting plate 404 rotates back to the lower side of the lifting frame 401, so that the separation of the docking sling 400 and the battery pack is realized, the battery pack is not required to be loaded and unloaded manually, the battery pack lifting efficiency is improved, and the potential safety hazard is reduced.

Referring to fig. 3, in the embodiment of the present utility model, the rotary docking assembly 402 further includes a second supporting plate 405, a connecting plate 406, and two rotating shafts 407, where the two rotating shafts 407 are opposite to each other at intervals and rotatably pass through the lifting frame 401, the first supporting plate 404 and the second supporting plate 405 are connected to the lower ends of the two rotating shafts 407 in a one-to-one correspondence manner, two ends of the connecting plate 406 are movably connected to the upper ends of the two rotating shafts 407 in a one-to-one correspondence manner, and the telescopic ends of the docking driving member 403 are in driving connection with the middle of the connecting plate 406 and are used for elongating and pushing the connecting plate 406 to drive the first supporting plate 404 and the second supporting plate 405 to rotate outwards and stretch out of the lifting frame 401. Namely, the connecting plate 406 is driven to move by the butt-joint driving piece 403 to drive the two rotating shafts 407 to rotate simultaneously, so that the first supporting plate 404 and the second supporting plate 405 arranged at the lower ends of the rotating shafts 407 can be synchronously screwed out of or screwed into the lifting frame 401, driving structures are not required to be arranged on the first supporting plate 404 and the second supporting plate 405, the consistency of the rotating motion of the first supporting plate 404 and the second supporting plate 405 and the lifting stability are ensured, and meanwhile, the production cost is reduced. Further, it is also possible that the two rotation shafts 407 are driven by separate rotation motors.

Referring to fig. 3 and 4, in the embodiment of the present utility model, both ends of the connecting plate 406 are provided with elongated holes 408 along the length direction, the upper ends of the two rotating shafts 407 are provided with connecting arms 409 radially extending from the rotating shafts 407, and the connecting arms 409 are provided with pin shafts 410 penetrating through the elongated holes 408 and capable of sliding in the elongated holes 408. That is, when the butt-joint driving piece 403 drives the connecting plate 406 to move, the connecting plate 406 also enables the pin 410 to slide in the elongated hole 408 when driving the pin 410 to move in the same direction, that is, the connecting arm 409 can rotate relative to the axis of the rotating shaft 407, so that the rotating shaft 407 can be driven to rotate, on one hand, motion interference can be avoided, the rotating shaft 407 can be ensured to smoothly rotate under the action of the butt-joint driving piece 403, on the other hand, the motion stroke of the pin 410 can be limited by limiting the length of the elongated hole 408, and further the rotation angle of the rotating shaft 407 can be accurately controlled, so that the first supporting plate 404 and the second supporting plate 405 connected to the lower end of the rotating shaft 407 can rotate to a proper position to support the battery pack, and the hoisting stability is improved.

Referring to fig. 1, in the embodiment of the present utility model, a guide 411 for inserting a guide socket of a battery pack is further downwardly protruded from the cradle 401. That is, the guide 411 plays a role of guiding the lifting position of the lifting frame 401 so that the first and second pallets 404 and 405 on the lifting frame 401 can accurately protrude into the bottom of the cross beam to hold up the battery pack. Specifically, the number of the guide pieces 411 is four, the four guide pieces 411 are arranged on two sides of the bottom of the lifting frame 401 in a rectangular array, the outer sides of the lower ends of the guide pieces 411 incline from bottom to top to form guide inclined planes, and the guide inclined planes are used for being attached to guide sockets of the cross beams to realize guiding. By providing the guide inclined surfaces and the four guide members 411, the lifting guide effect on the battery pack is further improved.

Referring to fig. 3, in the embodiment of the present utility model, the number of the rotary docking assemblies 402 is two, and the two rotary docking assemblies 402 are disposed on the lifting frame 401 at opposite intervals. The battery pack is supported on four points, so that the hoisting stability of the battery pack is improved.

Referring to fig. 1, 2 and 5, in the embodiment of the present utility model, a first hanging wheel 301 and a turning wheel 303 are disposed on a side of the sliding seat 202 facing the telescopic driving member 201, and a second hanging wheel 302 is disposed on a side of the sliding seat 202 facing away from the telescopic driving member 201. That is, when the telescopic driving piece 201 is shortened, the telescopic driving piece 201 pulls the sliding seat 202 to move towards the directions of the first hanging wheel 301 and the turning wheel 303, the vertical hanging lengths of the first hanging rope 304 and the second hanging rope 305 are increased, the hanging frame 401 descends, when the telescopic driving piece 201 is extended, the telescopic driving piece 201 pushes the sliding seat 202 to move towards the direction of the second hanging wheel 302, the vertical hanging lengths of the first hanging rope 304 and the second hanging rope 305 are reduced, the hanging frame 401 ascends, and the telescopic movement of the telescopic driving piece 201 can be converted into the lifting movement of the hanging frame 401, so that the hanging structure is simpler, and the production cost is reduced.

Of course, the present utility model is not limited to this, and the first hanging wheel 301 and the turning wheel 303 are disposed on the side of the sliding seat 202 opposite to the telescopic driving piece 201, and the second hanging wheel 302 may be disposed on the side of the sliding seat 202 opposite to the telescopic driving piece 201, when the telescopic driving piece 201 is shortened, the telescopic driving piece 201 pulls the sliding seat 202 to move toward the second hanging wheel 302, the vertical hanging lengths of the first hanging rope 304 and the second hanging rope 305 are reduced, the hanging frame 401 is lifted, when the telescopic driving piece 201 is extended, the sliding seat 202 moves toward the first hanging wheel 301 and the turning wheel 303, the vertical hanging lengths of the first hanging rope 304 and the second hanging rope 305 are increased under the gravity action of the butt-joint hanging tool 400, and the hanging frame 401 is lowered, so that stable hanging of the battery pack can be realized.

Referring to fig. 1, in an embodiment of the present utility model, a mobile frame 100 includes a frame body 101 and a sliding rail 102 provided on the frame body 101 and movably mounted with a sliding seat 202. That is, by installing the sliding rail 102 to provide installation support for the sliding seat 202, the sliding seat 202 moves more smoothly along the sliding rail 102, and the lifting of the first lifting rope 304 and the second lifting rope 305 is ensured to be more stable.

Referring to fig. 1, in the embodiment of the present utility model, the battery pack lifting device further includes a positioning assembly 500, the positioning assembly 500 includes a positioning sleeve 501 and a positioning rod 502, one of the positioning sleeve 501 and the positioning rod 502 is disposed at the bottom of the moving frame 100, the other is disposed at the top of the docking lifting tool 400, and the positioning rod 502 is insertable into the positioning sleeve 501. Namely, the positioning sleeve 501 and the positioning rod 502 are inserted in a butt joint manner, so that the hoisting frame 401 and the frame body 101 are fixed relatively in the horizontal direction, the hoisting frame 401 is prevented from swinging, and the battery pack on the hoisting frame 401 is stably hoisted. Specifically, the positioning sleeve 501 is disposed at the bottom of the moving frame 100, the positioning rod 502 is disposed at the top of the docking cradle 400, and the positioning rod 502 can be inserted upward into the positioning sleeve 501.

In addition, the utility model also provides hoisting equipment, wherein the hoisting equipment comprises the battery pack hoisting device. The lifting device adopts all the technical schemes of the above embodiments, so that the lifting device at least has all the beneficial effects brought by the technical schemes of the above embodiments, and the lifting device is not described in detail herein.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. The utility model provides a battery package hoist device which characterized in that, battery package hoist device includes:

a moving frame (100);

the telescopic driving mechanism (200) comprises a telescopic driving piece (201) arranged on the movable frame (100) and a sliding seat (202) movably arranged on the movable frame (100) and in driving connection with the telescopic driving piece (201);

the two hoisting assemblies (300) are arranged at intervals, the telescopic driving piece (201) is arranged at intervals and comprises a first hoisting wheel (301), a second hoisting wheel (302), a turning wheel (303), a first hoisting rope (304) and a second hoisting rope (305), the first hoisting wheel (301) and the turning wheel (303) are arranged at the first end of the movable frame (100), the second hoisting wheel (302) is arranged at the second end of the movable frame (100), the first end of the first hoisting rope (304) is connected with the sliding seat (202), the second end of the first hoisting rope (304) is guided to the first hoisting wheel (301), the first end of the second hoisting rope (305) is connected with the sliding seat (202), and the second end bypasses the turning wheel (303) to guide the second hoisting wheel (302);

and the butt joint lifting appliance (400) is respectively connected with the second ends of the first lifting rope (304) and the second lifting rope (305) and is used for bearing a battery pack.

2. The battery pack lifting device according to claim 1, wherein the docking lifting appliance (400) comprises a lifting frame (401) and a rotary docking assembly (402), the lifting frame (401) is respectively connected with the second ends of the first lifting rope (304) and the second lifting rope (305), the rotary docking assembly (402) comprises a docking driving member (403) arranged on the lifting frame (401) and a first supporting plate (404) rotatably arranged on the lifting frame (401), and the docking driving member (403) is used for driving the first supporting plate (404) to outwards rotate to extend out of the lifting frame (401) so as to be inserted into the bottom of a beam of the battery pack.

3. The battery pack lifting device according to claim 2, wherein the rotary butt joint assembly (402) further comprises a second supporting plate (405), a connecting plate (406) and two rotating shafts (407), the two rotating shafts (407) are oppositely spaced and rotatably penetrate through the lifting frame (401), the first supporting plate (404) and the second supporting plate (405) are connected with the lower ends of the two rotating shafts (407) in one-to-one correspondence, two ends of the connecting plate (406) are movably connected with the upper ends of the two rotating shafts (407) in one-to-one correspondence, and the telescopic ends of the butt joint driving piece (403) are connected with the middle driving piece of the connecting plate (406) and are used for elongating and pushing the connecting plate (406) to drive the first supporting plate (404) and the second supporting plate (405) to outwards rotate and stretch out of the lifting frame (401).

4. A battery pack lifting device according to claim 3, wherein both ends of the connecting plate (406) are provided with elongated holes (408) along the length direction, the upper ends of the two rotating shafts (407) are provided with connecting arms (409) extending radially from the rotating shafts (407), and the connecting arms (409) are provided with pin shafts (410) penetrating through the elongated holes (408) and capable of sliding in the elongated holes (408).

5. The battery pack lifting device according to claim 2, wherein the lifting frame (401) is further provided with a guide (411) extending downwards for inserting a guide socket of the battery pack.

6. A battery pack lifting device according to claim 3, wherein the number of the rotary docking assemblies (402) is two, and the two rotary docking assemblies (402) are arranged on the lifting frame (401) at opposite intervals.

7. The battery pack lifting device according to any one of claims 1 to 6, wherein the first lifting wheel (301) and the turning wheel (303) are arranged on one side of the sliding seat (202) arranged towards the telescopic driving member (201), and the second lifting wheel (302) is arranged on one side of the sliding seat (202) arranged away from the telescopic driving member (201).

8. The battery pack lifting device according to any one of claims 1 to 6, wherein the mobile frame (100) comprises a frame body (101) and a sliding rail (102) provided on the frame body (101) and to which the sliding seat (202) is movably mounted.

9. The battery pack lifting device according to any one of claims 1 to 6, further comprising a positioning assembly (500), the positioning assembly (500) comprising a positioning sleeve (501) and a positioning rod (502), one of the positioning sleeve (501) and the positioning rod (502) being arranged at the bottom of the mobile frame (100), the other being arranged at the top of the docking lifting appliance (400), and the positioning rod (502) being insertable into the positioning sleeve (501).

10. Hoisting device, characterized in that it comprises a battery pack hoisting device according to any one of claims 1 to 9.