Lifting appliance and hoisting device

Abstract

The application discloses a lifting device and a lifting appliance. The lifting appliance comprises a base, a first lifting arm, a second lifting arm and a lifting hook. The base is detachably mounted on a lifting end of a lifting device to move vertically under the driving of the lifting device. The first lifting arm is rotatably connected to the base about a first axis. The second lifting arm is rotatably connected to the first lifting arm about a second axis. The lifting hook is connected to the second lifting arm. In the state that the base is mounted on the lifting end, the first axis and the second axis are respectively parallel to the vertical direction and are arranged at intervals. The application can drive the first lifting arm or the second lifting arm to move by using manpower, so as to reduce the space occupied by the lifting device and the lifting appliance.

Description

Technical Field

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

[0002] The lifting device includes a frame, a boom, and a drive mechanism. The frame is fixed to the ground, and the boom is rotatably mounted on the frame. The drive mechanism is used to rotate the boom relative to the frame. Currently, the boom rotates about a basically horizontal axis; therefore, a drive mechanism is required to provide power to overcome the weight of the lifted load. This results in the lifting device occupying a large space, making it unsuitable for operation in confined spaces. Utility Model Content

[0003] The purpose of this application is to provide a lifting device and a hoisting apparatus that can be driven by human power to move the boom, thereby reducing the space occupied by the lifting device and the hoisting apparatus.

[0004] To achieve the above objectives, this application provides a lifting device comprising a base, a first boom, a second boom, and a hook. The base is detachably mounted on the lifting end of a lifting device, allowing vertical movement under the drive of the lifting device. The first boom is rotatably connected to the base about a first axis. The second boom is rotatably connected to the first boom about a second axis. The hook is connected to the second boom. When the base is mounted on the lifting end, the first and second axes are parallel to the vertical direction and spaced apart.

[0005] Optionally, the lifting device also includes a fastener threadedly connected to a first part of the base, the fastener having a thread axis that is a third axis, the fastener being used to press the lifting end against a second part of the base in the direction of extension of the third axis, so that the base is detachably connected to the lifting end.

[0006] Optionally, the base has a mounting groove for being fitted onto the outside of the lifting end through the mounting groove, and the first part and the second part are a pair of sidewalls of the mounting groove in the extension direction of the third axis.

[0007] Optionally, with the base installed on the lifting end, the third axis is parallel to the vertical, and the first part is located below the second part.

[0008] Optionally, the spreader further includes a first limiting member and / or a second limiting member. The first limiting member is used to limit the movement of the first boom and the base respectively, to prevent the first boom from rotating relative to the base about a first axis. The second limiting member is used to limit the movement of the first boom and the second boom respectively, to prevent the second boom from rotating relative to the first boom about a second axis.

[0009] Optionally, the base has a first limiting hole and the first boom has a second limiting hole. When the first boom rotates relative to the base around the first axis to a first predetermined posture, the first limiting hole and the second limiting hole are arranged opposite to each other in the extension direction of the first axis, and the first limiting member is used to be inserted into the first limiting hole and the second limiting hole.

[0010] Optionally, the first boom has a third limiting hole and the second boom has a fourth limiting hole. When the second boom rotates relative to the first boom around the second axis to a second predetermined posture, the third limiting hole and the fourth limiting hole are arranged opposite to each other in the extension direction of the second axis, and the second limiting member is used to be inserted into the third limiting hole and the fourth limiting hole.

[0011] Optionally, the hook is rotatably connected to the second boom around the fourth axis, and with the base installed at the lifting end, the fourth axis is located in the horizontal plane.

[0012] On the other hand, this application also provides a lifting device, which includes a lifting device and a lifting tool of any of the above.

[0013] Optionally, the lifting device is a forklift, and the forks of the forklift are the lifting ends.

[0014] The technical solution described in this application has the following advantages over the prior art:

[0015] In this technical solution, after the hook suspends the object to be lifted, the weight of the object acts on the hook in a vertically downward direction. According to the law of force transmission, this force is transmitted sequentially through the second boom and the first boom to the base, and finally borne by the lifting end of the lifting equipment. The entire force transmission path is: hook, second boom, first boom, base, and lifting equipment, and the direction of the force remains vertically downward throughout the transmission process, completely consistent with the directions of the first axis and the second axis (both parallel to the vertical). Since the weight of the object to be lifted does not generate a torque on the second boom about the second axis, nor on the first boom about the first axis, there is naturally no need to apply additional force to balance the torque and maintain the stability of the second and first booms. When it is necessary to move an object to be lifted in a horizontal plane, the operator needs to drive the second or first boom to rotate around its respective axis (first axis, second axis) in the horizontal plane. This rotation does not overcome the weight of the object, but rather the frictional force at the rotating joint of the second or first boom. This frictional force is much smaller than the weight of the object, and the rotation of the second or first boom in the horizontal plane can be easily achieved manually, without relying on additional drives (such as motors, hydraulic devices, etc.). Because this technical solution eliminates the need for drives and supporting transmission mechanisms, compared to existing technologies, this solution reduces the space occupied by the equipment, especially the space occupied by the first and second booms, meeting the needs of operating in confined spaces. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the lifting device of this application;

[0018] Figure 2 yes Figure 1 A three-dimensional structural diagram of the lifting device shown.

[0019] Figure 3 yes Figure 1 A front view of the lifting device shown;

[0020] Figure 4 This is a schematic diagram illustrating the adjustment of the hook position in the lifting device within a horizontal plane;

[0021] Figure 5 This is a cross-sectional schematic diagram of the base installed on the lifting end in one embodiment of this application;

[0022] Figure 6 This is a cross-sectional view of the base installed on the lifting end in another embodiment of this application;

[0023] Figure 7 yes Figure 2 An enlarged view of partial view E1 in the middle;

[0024] Figure 8 yes Figure 2 A magnified view of partial view E2 in the middle;

[0025] Figure 9 yes Figure 3 Sectional view of E3-E3.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-Lifting device; 2-Lifting tool; 21-Base; 211-First part; 212-Second part; 2121-First hole; 213-Mounting groove; 214-First limiting hole; 22-First boom; 221-Second limiting hole; 222-Third limiting hole; 23-Second boom; 231-Fourth limiting hole; 24-Hook; 25-Fastener; 26-Plug-in connector; 27-First limiting component; 28-Second limiting component; 3-Lifting equipment; 31-Main body; 32-Lifting end; 321-Second hole; L0-Reference axis; L1-First axis; L2-Second axis; L3-Third axis; L4-Fourth axis; P1-First position; P2-Second position. Detailed Implementation

[0028] During the installation, inspection, and maintenance of energy storage AC equipment, it is often necessary to replace internal components. However, the following problems are frequently encountered during this process: 1. Space constraints: The internal structure of energy storage AC equipment is compact and space is limited, making installation and disassembly difficult. 2. Low safety: Internal components of energy storage AC equipment, such as reactors and capacitors, are heavy, and manual handling can easily damage the equipment or even cause personal injury. 3. Low efficiency: Insufficient positioning accuracy during installation and disassembly leads to increased maintenance time. 4. Poor reusability: Different tooling is required when replacing different components.

[0029] Existing lifting devices consist of a frame and a boom. The frame is fixed to the ground, and the boom is rotatably mounted on the frame about a generally horizontal axis. The boom is used to suspend the object to be lifted. To drive the boom to rotate about the horizontal axis to overcome the weight of the object, a dedicated actuator (such as a motor, reducer, or hydraulic cylinder) is required. These actuators not only have a certain size (e.g., the motor requires radial and axial space, and the hydraulic cylinder requires space for extension and retraction), but also require a transmission mechanism (such as gears or chains) to connect the actuator and the boom. This significantly increases the overall size of the lifting device, especially in confined spaces, where the actuator and its associated structure can easily interfere with surrounding equipment or walls, preventing normal operation.

[0030] The following embodiments of this application adjust the extension direction of the rotation axis of the boom (hereinafter, unless otherwise specified, the boom refers to the first boom or the second boom), eliminate the driver, and use manual driving to drive the boom, thereby reducing the space occupied by the lifting equipment and lifting device, especially the space occupied by the boom area, so that the lifting equipment and lifting device can be suitable for operation in confined spaces.

[0031] Please see Figure 1 . Figure 1 This is a three-dimensional structural schematic diagram of an embodiment of the lifting device 1 of this application.

[0032] One embodiment of this application provides a lifting device 1. The lifting device 1 includes a lifting device 3 and a lifting head 2. The lifting head 2 is detachably mounted on the lifting end 32 of the lifting device 3 so as to move vertically under the drive of the lifting device 3.

[0033] Specifically, the lifting device 3 includes a main body 31 and a lifting end 32. The lifting end 32 is capable of vertical reciprocating relative to the main body 31.

[0034] In the illustrated embodiment, the lifting device 3 is a forklift. The forklift includes a body and forks. The body can move on the ground. The forks can move vertically back and forth relative to the body. There are usually multiple forks, which are arranged side by side to lift goods. The forklift body is the main body 31, and the forks are the lifting ends 32.

[0035] Using a forklift as the lifting device 3 not only fulfills the function of lifting and lowering the lifting device 2, but also facilitates the transfer of items to be lifted and the lifting device 2. For example, the forklift can move the lifting device 2 between the storage area and the work area. When the lifting device 2 is lifting an item, the forklift can be used to move the item to be lifted.

[0036] In some embodiments, the lifting device 3 can be a scissor lift. The working platform of the scissor lift is the lifting end 32. In other embodiments, the lifting device 3 can be a telescopic cylinder lift, also known as a telescopic cylinder lifting platform, which is a type of aerial work platform driven by a hydraulic system. Its core function is to transport a platform carrying workers and equipment to a designated height. This platform is the lifting end 32. The lifting device 3 is not limited to the examples above and can also adopt other structures.

[0037] Please see Figure 2 and Figure 3 . Figure 2 yes Figure 1 A three-dimensional structural diagram of the lifting device 1 and the lifting tool 2 shown. Figure 3 yes Figure 1 The front view of the lifting device 1 with lifting tool 2 shown.

[0038] The lifting device 2 includes a base 21, a first boom 22, a second boom 23, and a hook 24. The base 21 is detachably mounted on the lifting end 32 of the lifting equipment 3, allowing it to move vertically under the drive of the lifting equipment 3. The first boom 22 is rotatably connected to the base 21 about a first axis L1. The second boom 23 is rotatably connected to the first boom 22 about a second axis L2. The hook 24 is connected to the second boom 23. When the base 21 is mounted on the lifting end 32, the first axis L1 and the second axis L2 are parallel to the vertical direction and spaced apart.

[0039] Specifically, the first boom 22 is generally elongated and extends radially outward from the first axis L1, centered on the first axis L1. The second boom 23 is generally elongated and extends radially outward from the second axis L2, centered on the second axis L2. A hook 24 is located at the extended end of the second boom 23.

[0040] Specifically, "parallel" here refers to being roughly parallel. The allowable deviation for "roughly parallel" is not random deviation, but is limited to a range of "controllable slight tilt", which includes two forms.

[0041] The first type involves a slight unidirectional tilt: The first axis L1 or the second axis L2 forms a slight angle with the vertical only in a single direction (e.g., along the boom length or perpendicular to the boom length), but the tilt directions of both axes are consistent (e.g., both tilt to the same side), ensuring that the two axes remain approximately parallel and avoiding "crossing tilts" (i.e., the two axes tilt in opposite directions, causing a tendency to cross in space). For example, if the first axis L1 tilts 2° to the right along the boom length, and the second axis L2 also tilts 1.5° to the right along the boom length, the parallelism deviation between the two axes is only 0.5°, which is within the allowable range.

[0042] The second type is deviation caused by minor local bending: If the boom undergoes minor elastic deformation due to its own weight or the load being lifted (such as millimeter-level bending of the boom under the load), it may cause minor bending of the axis in a local area, resulting in slight fluctuations in the angle between the axis and the vertical (e.g., from 0° to 2.5°). As long as the "average direction" of the overall axis remains largely consistent with the vertical, it also falls under the category of "largely parallel." This is because the deviation caused by elastic deformation is temporary and reversible (the boom returns to its original shape after unloading) and will not affect the force transmission path during long-term use.

[0043] Please see Figure 4 . Figure 4 This is a schematic diagram of adjusting the position of hook 24 in lifting device 2 in the horizontal plane.

[0044] exist Figure 4 In the diagram, the solid lines represent the postures of the first boom 22 and the second boom 23 when the hook 24 is in the first position P1, and the dashed lines represent the postures of the first boom 22 and the second boom 23 when the hook 24 is in the second position P2.

[0045] When the hook 24 is in the first position P1, the angle between the first boom 22 and the reference axis L0 is the first angle A1, and the angle between the second boom 23 and the first boom 22 is the second angle A2.

[0046] When the hook 24 is in the second position P2, the angle between the first boom 22 and the reference axis L0 is the third angle A3, and the angle between the second boom 23 and the first boom 22 is the fourth angle A4.

[0047] When it is necessary to move the hook 24 from the first position P1 to the second position P2, that is, to move the object to be lifted from the first position P1 to the second position P2 in the horizontal plane, the operation process is as follows:

[0048] The operator rotates the first boom 22 counterclockwise, so that the angle between the first boom 22 and the reference axis L0 changes from the first angle A1 to the third angle A3;

[0049] The operator rotates the second boom 23 clockwise, so that the angle between the second boom 23 and the first boom 22 changes from the second angle A2 to the fourth angle A4.

[0050] The operator can rotate the first boom 22 and the second boom 23 simultaneously or in stages.

[0051] Depend on Figure 4 It can be seen that within a circle centered on the first axis L1 and with the sum of the lengths of the first boom 22 and the second boom 23 as the radius, the hook 24 can be selectively positioned at any location.

[0052] In one application scenario, the process of lifting items using hoisting equipment is as follows:

[0053] The base 21 of the lifting device 2 is installed on the lifting end 32 of the lifting equipment 3.

[0054] The item to be hoisted is connected to the hook 24 via slings.

[0055] The lifting end 32 rises, causing the lifting device 2 to lift the item to be lifted to the predetermined height.

[0056] The operator adjusts the posture of the first boom 22 and / or the second boom 23 so that the second boom 23, carrying the object to be lifted, extends into the predetermined position inside the energy storage AC device.

[0057] The lifting end 32 descends until the item to be lifted is placed in the predetermined area within the energy storage AC equipment.

[0058] Disconnect the sling from the hook 24.

[0059] The operator adjusts the posture of the first boom 22 and / or the second boom 23 so that the second boom 23 is removed from the energy storage AC equipment.

[0060] Remove the lifting device 2 from the lifting end 32.

[0061] In this technical solution, after the hook 24 suspends the object to be lifted, the weight of the object acts on the hook 24 in a vertically downward direction. According to the law of force transmission, this force is transmitted sequentially through the second boom 23 and the first boom 22 to the base 21, and is finally borne by the lifting end 32 of the lifting device 3. The entire force transmission path is: hook 24, second boom 23, first boom 22, base 21, and lifting device 3, and the direction of the force remains vertically downward throughout the transmission process, completely consistent with the direction of the first axis L1 and the second axis L2 (both parallel to the vertical). Since the weight of the object to be lifted will not generate a torque on the second boom 23 to rotate around the second axis L2, nor will it generate a torque on the first boom 22 to rotate around the first axis L1, there is naturally no need to apply additional force to balance the torque and maintain the stability of the second boom 23 and the first boom 22. When it is necessary to move the object to be lifted in the horizontal plane, the operator needs to drive the second boom 23 or the first boom 22 to rotate in the horizontal plane around their respective axes (first axis L1, second axis L2). This rotation does not overcome the weight of the object, but rather the frictional force at the rotating connection of the second boom 23 or the first boom 22. This frictional force is much smaller than the weight of the object, and the rotation of the second boom 23 or the first boom 22 in the horizontal plane can be easily achieved manually, without relying on additional drives (such as motors, hydraulic devices, etc.). Because this technical solution eliminates the need for drives and supporting transmission mechanisms, it directly reduces the core component with the largest volume proportion in the lifting device 1. From a structural dimension perspective, only the base 21, the first boom 22, the second boom 23, and the hook 24 need to be retained. These components are connected by a compact rotating connection, and the lateral space occupied depends only on the length of the second boom 23 and the first boom 22, while the vertical space occupied is determined by the height of the base 21 and the first boom 22. No additional space needs to be reserved for drive installation. Compared with existing technologies, this solution reduces the space occupied by the equipment, especially the space occupied by the first boom 22 and the second boom 23, thus meeting the needs of operation in confined spaces.

[0062] The following describes in detail the structure of the lifting device 32, which is detachably installed on the lifting end 32 of the lifting equipment 3.

[0063] Please see Figure 5 . Figure 5 This is a cross-sectional view of the base 21 installed on the lifting end 32 in one embodiment of this application.

[0064] In some embodiments, the lifting device 2 further includes a fastener 25, which is threaded to a first portion 211 of the base 21. The thread axis of the fastener 25 is a third axis L3. The fastener 25 is used to press the lifting end 32 against a second portion 212 of the base 21 in the extending direction of the third axis L3, so that the base 21 is detachably connected to the lifting end 32.

[0065] Specifically, the fastener 25 can be a bolt. The fastener 25 is rotatable about the third axis L3 to move in the extending direction of the third axis L3.

[0066] Fastener 25 is screwed onto the first part 211, allowing the position of fastener 25 relative to the first part 211 in the extension direction of the third axis L3 to be adjustable. When the lifting end 32 is sandwiched between the second part 212 and the fastener 25 in the extension direction of the third axis L3, tightening the fastener 25 causes it to press against the lifting end 32 in the extension direction of the third axis L3. Under the pressure of the fastener 25, the static friction between the pair of mating surfaces S of the lifting end 32 and the second part 212 prevents relative movement between the lifting end 32 and the second part 212. Additionally, the static friction between the lifting end 32 and the fastener 25 also prevents relative movement between them. Thus, the base 21 is locked to the lifting end 32 by the fastener 25. When it is necessary to remove the base 21 from the lifting end 32, simply loosen the fastener 25.

[0067] Please continue reading. Figure 5 In some embodiments, the base 21 has a mounting groove 213, which is used to be sleeved on the outside of the lifting end 32 through the mounting groove 213. The first part 211 and the second part 212 are a pair of sidewalls of the mounting groove 213 in the extension direction of the third axis L3.

[0068] By setting the mounting groove 213, the base 21 and the lifting end 32 can be limited and matched by the side wall of the mounting groove 213, which enhances the stability of the base 21 set on the lifting end 32.

[0069] In addition, by setting the mounting slot 213, the base 21 is supported by the lifting end 32. The weight of the lifting device 2 and the weight of the items lifted by the lifting device 2 are both applied to the bearing surface of the lifting end 32, reducing the load at the fastener 25. When the lifting device 3 is a forklift, inserting the forks into the mounting slot 213 makes it easier to lift the lifting device 2.

[0070] Please continue reading. Figure 5 In some embodiments, with the base 21 mounted on the lifting end 32, the third axis L3 is parallel to the vertical, and the first part 211 is located below the second part 212.

[0071] In this embodiment, the weight of the lifting device 2 and the weight of the object lifted by the lifting device 2 both act on the lifting end 32 and the pair of mating surfaces S of the second part 212, which can increase the static friction between the pair of mating surfaces S, thereby improving the stability of the base 21 installed on the lifting end 32.

[0072] Please see Figure 6 . Figure 6 This is a cross-sectional view of the base 21 mounted on the lifting end 32 in another embodiment of this application.

[0073] In some other embodiments, the base 21 can be detachably installed on the lifting end 32 by means of a limiting fit.

[0074] Specifically, the base 21 has a mounting groove 213, which is used to fit over the lifting end 32. The mounting groove 213 has a first part 211 and a second part 212 on its vertically arranged pair of sidewalls. The second part 212 is located above the first part 211. The second part 212 has multiple vertically penetrating first holes 2121. The lifting end 32 has multiple vertically penetrating second holes 321. The lifting device 2 also includes multiple connectors 26. The first holes 2121, second holes 321, and connectors 26 are correspondingly arranged. After the lifting end 32 is inserted into the mounting groove 213, the connectors 26 are inserted into the corresponding first holes 2121 and second holes 321. The base 21 is supported by the lifting end 32 through the second part 212. The connectors 26 are used to limit the relative position of the base 21 and the lifting end 32 in the horizontal plane.

[0075] Since the first boom 22 can rotate relative to the base 21 and the second boom 23 can rotate relative to the first boom 22, the first boom 22 and the second boom 23 may swing freely during the transfer of the lifting device 2 or the object to be lifted, leading to accidents. In order to enable the first boom 22 and the second boom 23 to rotate selectively, the following improvements are made.

[0076] Please see Figure 7 . Figure 7 yes Figure 2 A magnified view of partial view E1.

[0077] In some embodiments, the lifting device 2 further includes a first limiting member 27. The first limiting member 27 is used to limit the first boom 22 and the base 21 respectively, so as to prevent the first boom 22 from rotating relative to the base 21 about the first axis L1.

[0078] Specifically, the base 21 has a first limiting hole 214, and the first boom 22 has a second limiting hole 221. When the first boom 22 rotates relative to the base 21 around the first axis L1 to a first predetermined posture, the first limiting hole 214 and the second limiting hole 221 are arranged opposite to each other in the extension direction of the first axis L1, and the first limiting member 27 is used to be inserted into the first limiting hole 214 and the second limiting hole 221 respectively.

[0079] When the first limiting member 27 is inserted into the first limiting hole 214 and the second limiting hole 221, the first boom 22 and the base 21 are relatively fixed, and the first boom 22 cannot rotate relative to the base 21 around the first axis L1. After the first limiting member 27 is pulled out from the first limiting hole 214 and the second limiting hole 221, the first boom 22 can rotate relative to the base 21 around the first axis L1.

[0080] In some other embodiments (not shown), a magnetic limiting component can also be used for limiting. Specifically, a powerful electromagnet is installed on the base 21 at a position corresponding to the first axis L1, and a magnetically conductive material (such as soft iron) is embedded in the first boom 22 at a position corresponding to the electromagnet. When it is necessary to limit the rotation of the first boom 22, the electromagnet is energized, and the electromagnet generates a strong magnetic force, attracting the magnetically conductive material on the first boom 22. The two adhere tightly, thereby preventing the first boom 22 from rotating relative to the base 21 around the first axis L1. When it is necessary to release the restriction, the power supply to the electromagnet is cut off, the magnetic force disappears, and the first boom 22 can rotate freely. The advantages of this solution are no mechanical contact wear, fast response speed, and easy automation through electrical control, but a stable power supply system is required.

[0081] In some other embodiments (not shown), a ratchet and pawl limiting device can also be used for limiting. Specifically, a ratchet with ratchet teeth is installed on the circumferential surface of the base 21 around the first axis L1, and a pawl that can swing around the axis is installed on the first boom 22. The pawl is connected to the first boom 22 by a spring, and under the action of the spring, the pawl always remains in contact with the ratchet. When the first boom 22 rotates, the pawl jumps on the ratchet teeth of the ratchet. To fix the first boom 22, simply lock the pawl at a specific ratchet tooth position to prevent the first boom 22 from rotating in the opposite direction; forward rotation can still be achieved by overcoming the spring force to make the pawl jump over the ratchet teeth. To release the limiting, manually move the pawl to disengage it from the ratchet teeth, and the first boom 22 can rotate freely. This solution has a simple structure, low cost, and can switch between unidirectional limiting and free rotation, making it suitable for scenarios where the limiting accuracy requirement is relatively low and the object to be lifted is small.

[0082] Please see Figure 8 . Figure 8 yes Figure 2 A magnified view of partial view E2.

[0083] In some embodiments, the lifting device 2 further includes a second limiting member 28. The second limiting member 28 is used to limit the first boom 22 and the second boom 23 respectively, so as to prevent the second boom 23 from rotating relative to the first boom 22 about the second axis L2.

[0084] Specifically, the first boom 22 has a third limiting hole 222, and the second boom 23 has a fourth limiting hole 231. When the second boom 23 rotates relative to the first boom 22 around the second axis L2 to a second predetermined posture, the third limiting hole 222 and the fourth limiting hole 231 are arranged opposite to each other in the extension direction of the second axis L2, and the second limiting member 28 is used to be inserted into the third limiting hole 222 and the fourth limiting hole 231 respectively.

[0085] When the second limiting member 28 is inserted into the third limiting hole 222 and the fourth limiting hole 231, the second boom 23 and the first boom 22 are relatively fixed, and the second boom 23 cannot rotate relative to the base 21 around the second axis L2. After the second limiting member 28 is pulled out from the third limiting hole 222 and the fourth limiting hole 231, the second boom 23 can rotate relative to the first boom 22 around the second axis L2.

[0086] Please see Figure 9 . Figure 9 yes Figure 3 Sectional view of E3-E3.

[0087] In some embodiments, the hook 24 is rotatably connected to the second boom 23 around the fourth axis L4, and the base 21 is installed on the lifting end 32, with the fourth axis L4 located in the horizontal plane.

[0088] The fourth axis L4 is located in the horizontal plane and the hook 24 is rotatable, which further enables the lifting object to adjust its posture in the vertical plane. This makes the "position adjustment in the horizontal plane" (by rotating the boom) and the "posture adjustment in the vertical plane" (by rotating the hook 24) independent and flexible, which is fully adapted to the "small space and diverse posture requirements" operation scenario inside the energy storage AC equipment, and improves the adaptability of the lifting device 1 in small spaces.

[0089] The terms "upper" and "lower" are used to describe the relative positions of the various structures in the accompanying drawings. They are only for clarity of description and are not intended to limit the scope of implementation of this application. Any changes or adjustments to the relative positions without substantially altering the technical content shall also be considered within the scope of implementation of this application.

[0090] It should be noted that, in this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through 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 indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0091] Furthermore, in this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," 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 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. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0092] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A lifting device, characterized in that, The lifting device includes: A base for detachably mounting on the lifting end of a lifting device, so as to move vertically under the drive of the lifting device; A first boom, which is rotatably connected to the base about a first axis; A second boom, rotatably connected to the first boom about a second axis; and A hook, which is connected to the second boom; When the base is installed on the lifting end, the first axis and the second axis are parallel to the vertical direction and are spaced apart.

2. The lifting device according to claim 1, characterized in that, The lifting device also includes: A fastener, the fastener being threadedly connected to a first portion of the base, the thread axis of the fastener being a third axis, the fastener being used to press the lifting end against a second portion of the base in the extension direction of the third axis, so that the base is detachably connected to the lifting end.

3. The lifting device according to claim 2, characterized in that, The base has a mounting groove, and the base is used to be sleeved on the outside of the lifting end through the mounting groove. The first part and the second part are respectively a pair of sidewalls of the mounting groove in the extension direction of the third axis.

4. The lifting device according to claim 2, characterized in that, With the base installed on the lifting end, the third axis is parallel to the vertical direction, and the first part is located below the second part.

5. The lifting device according to claim 1, characterized in that, The lifting device also includes: A first limiting member, which engages with both the first boom and the base to prevent the first boom from rotating relative to the base about the first axis; and / or, The second limiting member is used to limit the first boom and the second boom respectively, so as to prevent the second boom from rotating relative to the first boom around the second axis.

6. The lifting device according to claim 5, characterized in that, The base has a first limiting hole, and the first boom has a second limiting hole. When the first boom rotates relative to the base around the first axis to a first predetermined posture, the first limiting hole and the second limiting hole are arranged opposite to each other in the extension direction of the first axis, and the first limiting member is used to be inserted into the first limiting hole and the second limiting hole.

7. The lifting device according to claim 5, characterized in that, The first boom has a third limiting hole, and the second boom has a fourth limiting hole. When the second boom rotates relative to the first boom around the second axis to a second predetermined posture, the third limiting hole and the fourth limiting hole are arranged opposite to each other in the extension direction of the second axis, and the second limiting member is used to be inserted into the third limiting hole and the fourth limiting hole.

8. The lifting device according to claim 1, characterized in that, The hook is rotatably connected to the second boom around the fourth axis, and the fourth axis is located in the horizontal plane when the base is installed on the lifting end.

9. A lifting device, characterized in that, The lifting device includes: Lifting equipment; and The lifting device is the lifting device according to any one of claims 1-8.

10. The lifting device according to claim 9, characterized in that, The lifting device is a forklift, and the forks of the forklift are the lifting ends.

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