Lifting appliance and lifting device of battery pack

Abstract

The utility model relates to the technical field of lifting equipment, in particular to a lifting appliance and a lifting device of a battery pack, the lifting appliance is used for lifting goods with lifting holes or a tray for loading the goods, and the lifting appliance comprises a lifting rod, a hook body and a locking piece; the lifting rod comprises a first end and a second end used for being directly or indirectly connected with a lifting mechanism. The hook body is fixed at the first end of the suspender and convexly extends towards the first side of the suspender; the locking piece is movably arranged on the suspender, the locking piece is constructed to be capable of moving between a first area on the suspender and a second area on the suspender, the second area is the second side of the first end of the suspender, the second side and the first side of the suspender are oppositely arranged, and the first area is the area except the second area on the suspender; when the end, with the hook body, of the lifting appliance is mounted in the lifting hole and the locking piece is located in the second area, the lifting appliance can be limited to be separated from the lifting hole; the lifting appliance provided by the utility model can be quickly mounted and safely locked in a limited space.

Description

A lifting device for a lifting sling and a battery pack Technical Field

[0001] This utility model relates to the field of hoisting equipment technology, specifically to a hoisting device for a lifting tool and a battery pack, which is particularly suitable for scenarios where battery packs, industrial pallets, and other items need to be fixed and hoisted through lifting holes. Background Technology

[0002] In lifting operations involving heavy goods such as battery packs and industrial equipment, traditional lifting tools typically rely on the direct snap-fit ​​between the hook and the lifting hole for securing the load. However, this type of lifting tool has significant drawbacks in practical applications: when the space below the lifting hole is limited (such as when the pallet is placed close to the ground or on a platform), traditional hooks, due to their large size or fixed structure, require a large installation gap to be left for insertion, resulting in low installation efficiency or even inoperability. For example, if there is insufficient space below the lifting hole, the pallet must be lifted manually, which not only increases the workload but also poses safety hazards. Therefore, there is an urgent need for a lifting tool that can adapt to confined spaces, is easy to install, and provides reliable locking. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a lifting device for a lifting sling and a battery pack that can be quickly installed and safely locked in a limited space.

[0004] To achieve the above and other related objectives, this utility model provides a lifting device for lifting goods with lifting holes or pallets loaded with goods. The lifting device includes:

[0005] A boom, comprising a first end and a second end for direct or indirect connection with a lifting mechanism;

[0006] The hook body is fixed to the first end of the boom and protrudes to the first side of the boom;

[0007] A locking member is movably disposed on the boom, and the locking member is configured to move between a first region on the boom and a second region on the boom, the second region being a second side of a first end of the boom, the second side of the boom being disposed opposite to the first side, and the first region being a region on the boom other than the second region;

[0008] When one end of the lifting device with a hook is installed in the lifting hole and the locking member is located in the second area, the lifting device can be prevented from detaching from the lifting hole.

[0009] In one embodiment of this utility model, the lifting device further includes:

[0010] The lifting part is hinged to the boom or slidably connected along the axial direction of the boom, and the boom is connected to the lifting mechanism through the lifting part;

[0011] A linkage assembly is provided, which drives the lifting part and the locking member. The linkage assembly is configured to convert the rotation or sliding of the lifting part into the axial movement and / or circumferential rotation of the locking member along the lifting rod.

[0012] When the lifting part is driven to rotate or slide relative to the boom during lifting, the lifting part drives the locking member to move from the first region of the boom to the second region of the boom through the linkage assembly;

[0013] And / or when the lifting force is released, the locking element is reset to the first region via a linkage assembly or a reset element.

[0014] In one embodiment of this utility model, the lifting part is hinged to the second end of the lifting rod, and the linkage assembly includes a connecting rod, one end of which is hinged to the lifting part and the other end of which is hinged to the locking member;

[0015] When the lifting unit rotates, the locking member is driven to slide along the axial direction of the lifting rod via a connecting rod, so that the locking member can switch positions in the first region and the second region.

[0016] In one embodiment of this utility model, the first region is the first side of the first end of the boom and is located at the upper end of the hook body; the linkage component includes an elastic torsion bar and a guide tube, the guide tube is disposed on the boom, the middle region of the elastic torsion bar constrains the movement path through the guide tube, the elastic torsion bar connects the lifting part and the locking member, and the locking member is circumferentially rotatably connected to the boom;

[0017] When the lifting part rotates or slides or rotates along the axial direction of the boom, the locking member is driven to rotate circumferentially along the boom by the elastic torsion bar, so that the locking member can switch positions in the first region and the second region.

[0018] In one embodiment of the present invention, a guide portion is provided on the circumferential surface of the boom, and the locking member is adapted to the guide portion and moves in the first and second regions of the boom through the guide portion.

[0019] In one embodiment of the present invention, the lifting part includes a rotating body and a first extension and a second extension extending from the rotating body in different radial directions. The rotating body is hinged to the boom. The first extension is used to connect with the lifting mechanism, and the second extension is used to connect or movably connect with the linkage component. When the first extension is parallel to the boom and located at the upper end of the boom, the locking member is located in the second region.

[0020] In one embodiment of this utility model, the rotation angle range of the lifting part is a preset angle range, or the distance that the lifting part slides along the axial direction of the lifting rod is a predetermined displacement range, so as to limit the stroke of the locking member to only move between the predetermined first region and the second region.

[0021] In one embodiment of the present invention, along the radial direction of the boom, the sum of the radial dimensions of the hook and the boom is less than the corresponding inner diameter of the boom hole. When the locking member moves to the second region, the sum of the radial dimensions of the hook, the boom, and the locking member is greater than the corresponding inner diameter of the boom hole.

[0022] To achieve the above and other related objectives, this utility model provides a lifting device for a battery pack, including the aforementioned lifting tool, and:

[0023] A tray for carrying the battery pack, the tray being provided with lifting holes;

[0024] The lifting mechanism is directly or indirectly connected to the second end of the lifting rod of the lifting device;

[0025] When the lifting mechanism lifts the pallet, the lifting device passes through the lifting hole of the pallet, and the hook body abuts against the bottom of the lifting hole or the inner wall bearing surface on the vertical downward surface, and the locking member passes through the lifting hole.

[0026] In one embodiment of this utility model, along the axial direction of the lifting rod, the locking member is provided with an axial guide structure between itself and the lifting hole.

[0027] In summary, this utility model movably mounts a locking component on the boom, and achieves locking and releasing of the lifting device by switching the position of the locking component. When the hook of the lifting device enters the lifting hole, the locking component can move to the second area of ​​the boom, that is, the second side of the first end of the boom (adjacent to the hook). Through interference fit or mechanical locking with the inner wall of the lifting hole, it forms a lock, thereby restricting the lifting device from detaching. When disassembly is required, the locking component can retract to the middle section or the second end area of ​​the boom, reducing the overall radial dimension of the end of the lifting device with the hook, making it easier to pull out of the lifting hole.

[0028] Compared to traditional lifting devices, this invention does not rely heavily on ample space below the lifting hole or manual intervention. Locking is achieved solely through the axial displacement or rotation of the locking component. When the locking component moves to the second area, it forms a combined locking structure with the lifting rod and hook, ensuring even force distribution and eliminating the risk of slippage during lifting. When moved to the first area, the overall size of the lifting device adapts to the lifting hole diameter, enabling rapid installation and disassembly. It is suitable for scenarios where the pallet is close to the ground, solving the problem of traditional hooks being unable to be installed due to their fixed size. It can be widely used in lifting operations in fields such as new energy battery packs and warehousing logistics. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 is a three-dimensional structural schematic diagram of one embodiment of the lifting device of this utility model;

[0031] Figure 2 is a three-dimensional structural schematic diagram of the lifting device in one embodiment of the present invention, wherein the locking member is located in the second region;

[0032] Figure 3 is a diagram showing one state of the locking component of the lifting device in one embodiment of this utility model;

[0033] Figure 4 is a top view of the lifting device in one embodiment of the present invention;

[0034] Figure 5 is a cross-sectional view AA of Figure 4, in which the lower end of the locking element is provided with an axial guide structure.

[0035] Figure 6 is a schematic diagram of the connection between the boom and the hook body in one embodiment of the present invention;

[0036] Figure 7 is a diagram showing the state in which the hook of the lifting device is inserted into the lifting hole, but the locking component has not yet locked, according to one embodiment of the present invention.

[0037] Figure 8 shows a diagram in one embodiment of the present invention, in which the hook of the lifting device is inserted into the lifting hole and the locking member is in a locked state.

[0038] Figure 9 is a diagram showing the state in which one end of the lifting device with the hook is inserted into the lifting hole and locked with the lifting hole in one embodiment of the present invention.

[0039] Figure 10 is a schematic diagram of the lifting device structure in another embodiment of the present invention;

[0040] Figure 11 is a schematic diagram of the lifting device structure in another embodiment of the present invention;

[0041] Component labeling description: Lifting device 10, Lifting rod 1, First end and second side (second area) of lifting rod 11, Guide part 12, Hook 2, Locking part 3, Axial guide structure 32, Lifting part 4, Rotating body 41, First extension part 42, Second extension part 43, Linkage assembly 5, Connecting rod 51, Elastic torsion bar 52, Conduit 521, Motion conversion assembly 53, Bearing 531, Rotating sleeve 532, Transmission rod 533, Lifting hole 20, Hole sleeve 21. Detailed Implementation

[0042] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. It should also be understood that the terminology used in the embodiments of this utility model is for describing specific implementation schemes and not for limiting the scope of protection of this utility model. Test methods in the following embodiments that do not specify specific conditions are generally performed under conventional conditions or according to the conditions recommended by the respective manufacturers.

[0043] Please refer to Figures 1 to 11. It should be noted that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0044] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in this invention, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this invention, as well as the prior art known to those skilled in the art and the description of this invention, may be implemented using any prior art methods, devices, and materials similar to or equivalent to those described, used, or made of materials in the embodiments of this invention.

[0045] Please refer to Figures 1-2, 6, 10, or 11. This utility model provides a lifting device 10, which is used to lift goods with lifting holes 20 or pallets loaded with goods. The lifting device 10 includes a lifting rod 1, a hook body 2, and a locking element 3.

[0046] The boom 1 includes a first end and a second end for direct or indirect connection with a lifting mechanism; the hook 2 is fixed to the first end of the boom 1 and protrudes towards a first side of the boom 1; the locking member 3 is movably disposed on the boom 1, and the locking member 3 is configured to move between a first region on the boom 1 and a second region on the boom 1, the second region being the second side 11 of the first end of the boom 1, the second side of the boom 1 being opposite to the first side along the radial direction of the boom 1, and the first region being the region on the boom 1 other than the second region;

[0047] When the lifting device 10 has one end with hook 2 installed in the lifting hole 20 and the locking member 3 is located in the second region, it can restrict the lifting device 10 from leaving the lifting hole 20. That is, when the locking member 3 is located in the second region, the outer diameter of the end of the lifting device 10 with hook 2 is larger than the inner diameter of the lifting hole 20 to form a mechanical lock. When the locking member 3 is located in the first region, the outer diameter of the second end of the lifting device 10 is smaller than the outer diameter of the lifting hole 20, so that the lifting device 10 can leave the lifting hole 20.

[0048] It should be noted that the lifting device 10 involved in this utility model solves the problem of installation difficulties caused by space constraints in traditional lifting devices 10 during lifting operations; by dynamically moving the locking member 3 to adjust the outer diameter of the lifting device 10, quick installation and reliable locking can be achieved in narrow spaces. After the hook 2 is inserted into the lifting hole 20, the operator drives the locking member 3 from the first area to the second area by rotating or pushing the lifting rod 1. During this process, the radial dimension change of the locking member 3 causes the outer diameter of the end of the lifting device 10 with the hook 2 to exceed the diameter of the lifting hole 20, forming mechanical interference, thereby achieving locking between the lifting device 10 and the lifting hole 20.

[0049] The lifting device 10 comprises at least three parts: a lifting rod 1, a hook 2, and a locking component 3. The lifting rod 1 has a cross-section that meets usage requirements, such as circular, square, or polygonal. The hook 2 is fixed to the first end of the lifting rod 1, and protrudes towards the first side of the lifting rod 1, forming a force-bearing structure for insertion into the lifting hole 20. The hook 2 can be fixed not only by welding or integral molding, but also by detachable bolt connections to adapt to maintenance needs under different working conditions. The second end of the lifting rod 1 can be directly connected to a lifting rope, or indirectly connected to a lifting mechanism through additional adapter rings, universal joints, and lifting parts 4, thereby expanding its application scenarios. The locking component 3, as a core functional component, is movably mounted on the lifting rod 1, and its movement path covers the first and second regions of the lifting rod 1. The second region is located on the second side of the first end of the lifting rod 1 (opposite to the protruding direction of the hook 2). When the locking component 3 is in the second region, the outer diameter of the end of the lifting device 10 with the hook 2 increases to form a mechanical lock. Here, the locking component 3 is a slider or eccentric wheel structure. For example, the slider can be manually driven to move between the first and second regions of the boom 1. The eccentric wheel is rotatably set on the upper side of the hook 2 at the first end of the boom 1. The eccentric wheel changes its radial protrusion by rotating, thereby realizing the combination of boom 1, hook 2 and locking member 3, so that the diameter of the end of the lifting device 10 with hook 2 is increased to limit the lifting hole 20. These lower structures can all meet the functional requirements of the locking member 3 and have different applicable scenarios.

[0050] Traditional lifting devices 10, due to their fixed structure, require additional lifting of the cargo or adjustment of the device's angle when there is insufficient space below the lifting hole 20, resulting in low operational efficiency and safety hazards. This lifting device 10, through the adjustable position of the locking element 3, allows the operator to complete installation without requiring a large clearance. When the locking element 3 is in the first zone, the outer diameter of the lifting device 10 narrows, allowing it to be easily inserted into the narrow lifting hole 20 from above. Moving to the second zone expands the outer diameter, forming a self-locking structure that ensures stable lifting, making operation convenient and quick, and avoiding safety risks caused by lifting cargo. Furthermore, the multiple configurations of the locking element 3 enhance the adaptability of the lifting device 10, allowing for optimized configuration for lifting holes 20 with different diameters, materials, or loads. Ultimately, this lifting device 10 improves installation efficiency while significantly enhancing the reliability of lifting operations through its mechanical locking mechanism.

[0051] As an optional embodiment of this utility model, the movement of the locking member 3 between the first region and the second region can be automatically driven by an active driving member, such as electromagnetic force drive, motor and gear set drive, or motor and linkage set drive.

[0052] As an optional embodiment of this utility model, a sleeve 21 is provided inside the lifting hole 20 to reduce the collision between the lifting device 10 and the lifting hole 20, thereby reducing noise. It also serves to protect the lifting device 10 from wear between the lifting hole 20 and the lifting device 10. The sleeve 21 is made of plastic or rubber material.

[0053] As an optional embodiment of this utility model, the locking member 3 is rotatably disposed on the lifting rod 1 and threadedly connected to the lifting rod 1. The locking member 3 can rotate around the axis of the lifting rod 1, thereby realizing rotation from the first region to the second region. For example, the first region is the first end and first side of the lifting rod 1 and is located at the upper end of the hook body 2.

[0054] As shown in Figures 1 and 2, in an optional embodiment of the present invention, the lifting device 10 further includes a lifting part 4 and a linkage component 5;

[0055] The lifting part 4 is hinged to the lifting rod 1 or slidably connected along the axial direction of the lifting rod 1, and the lifting rod 1 is connected to the lifting mechanism through the lifting part 4;

[0056] The linkage component 5 is a transmission connection between the lifting part 4 and the locking member 3. The linkage component 5 is configured to convert the rotation or sliding of the lifting part 4 into the axial movement and / or circumferential rotation of the locking member 3 along the lifting rod 1.

[0057] When the lifting part 4 is driven by the lifting force to rotate or slide relative to the boom 1 during lifting, the lifting part 4 drives the locking member 3 to move from the first region of the boom 1 to the second region of the boom 1 through the linkage component 5;

[0058] And / or when the lifting force is released, the locking member 3 is reset to the first region via the linkage assembly 5 or the reset element.

[0059] It should be noted that the lifting part 4, as the force transmission hub between the lifting rod 1 and the lifting mechanism, can be connected to the lifting rod 1 in two ways: hinged or axial sliding. Hinged connections can be achieved through a single-axis pin, universal joint, or ball joint structure to meet the force transmission requirements at different angles; axial sliding is achieved through a slide rail, guide groove, or telescopic sleeve, allowing the lifting rod 1 to adaptively adjust its position along the axis during lifting. The linkage component 5 is used for motion conversion, transforming the rotation or sliding of the lifting part 4 into the axial / circumferential motion of the locking element 3. Its transmission form can be at least three structures: first, a linkage 51 mechanism (such as a four-bar linkage or rocker arm), which amplifies displacement through rigid connection; second, a gear and rack or worm gear system, which converts rotation into linear motion; and third, a combination of a cam and a follower, which uses a contoured surface to drive the locking element 3 to move precisely. The reset function can be achieved through an independent reset element (such as a compression spring, tension spring, or torsion spring), or by relying on the structural characteristics of the linkage component 5 itself (such as gravity reset) to complete the automatic return of the locking element 3 from the second region to the first region.

[0060] This design utilizes lifting force to trigger self-locking. During lifting, the tension applied by the lifting mechanism drives the lifting part 4 to rotate or slide relative to the boom 1. The linkage assembly 5 converts this motion into the directional movement of the locking member 3 towards the second region (locked position). For example, when the lifting part 4 rotates under tension, the locking member 3 is pushed radially out along the boom 1 via the connecting rod 51. If the lifting part 4 slides axially, the gear and rack system drives the locking member 3 to rotate into the second region. During this process, when the locking member 3 can smoothly enter the lifting hole 20, it generally does not require manual intervention and is automatically triggered by the lifting force. After the locking member 3 reaches the second region, its outer diameter exceeds the inner diameter of the lifting hole 20, forming mechanical interference. At this time, the linkage assembly 5 maintains the locked state due to the self-locking angle or the position beyond the center. During unloading, the lifting force disappears, causing the reset element (such as a spring) to release its stored energy. Alternatively, the center of gravity of the lifting part 4 may be offset, allowing the lifting part 4 to automatically rotate under gravity and drive the linkage component 5 in the opposite direction, causing the locking part 3 to retract to the first area (release position), thus enabling the lifting device 10 to detach quickly. For example, if the center of gravity of the lifting part 4 is biased towards the first extension 42, when the lifting part 4 is not subjected to the lifting force, the first extension 42 will fall under its own weight and the weight of the lifting mechanism, causing the lifting part 4 to rotate or move down along the lifting rod 1.

[0061] Traditional lifting devices 10 require complex manual operation for locking and unlocking, resulting in low efficiency. This solution, through the synergistic effect of lifting force and linkage component 5, can avoid or reduce manual intervention to a certain extent: locking is automatically completed at the moment of lifting, and the locking component 3 automatically resets and releases during unloading. The integrated design of self-locking and reset significantly shortens the lifting cycle, making it particularly suitable for automated production lines and high-risk environment lifting scenarios. While ensuring locking reliability, it also improves operational efficiency.

[0062] As shown in Figures 1 and 2, in an optional embodiment of the present invention, the lifting part 4 is hinged to the second end of the lifting rod 1, and the linkage component 5 includes a connecting rod 51, one end of the connecting rod 51 is hinged to the lifting part 4, and the other end is hinged to the locking member 3.

[0063] When the lifting part 4 rotates, the locking member 3 is driven to slide along the axial direction of the lifting rod 1 via the connecting rod 51, so that the locking member 3 can switch between the positions of the first region and the second region.

[0064] It should be noted that the hinge connection between the lifting part 4 and the second end of the lifting rod 1 is not limited to a single-axis pin connection, but can also be extended to a double-eared pin, a spherical bearing, or a composite hinge structure to adapt to the lifting force transmission requirements at different angles. The connecting rod 51 in the linkage assembly 5 can be hinged at both ends in at least two ways: one is using an elastic bushing hinge to buffer impact loads; the other is setting an adjustable-length threaded connecting rod 51 to facilitate fine-tuning of the locking stroke. The axial sliding guide mechanism of the locking element 3 can be achieved through the straight groove on the lifting rod 1 and the slider, or by using a guide post-guide sleeve combination, a linear slide rail, or other precision guide structures to ensure smooth sliding without jamming. It is worth noting that the locking element 3 switches positions between the first and second regions.

[0065] When the lifting mechanism applies tension, the lifting part 4 rotates around the hinge axis, pushing the locking member 3 to slide along the axial direction of the lifting rod 1 via the connecting rod 51. This process is essentially the motion transmission of the planar connecting rod 51 mechanism: the lifting part 4 acts as the active rocker arm, the connecting rod 51 acts as the connecting rod, and the locking member 3 acts as the movable slider, forming a sliding pair with the lifting rod 1. The mapping relationship between the rotation angle and the sliding displacement is determined by the hinge point position. When the lifting part 4 rotates to a specific angle (such as 90° to 180°), the locking member 3 moves from the first region (avoidance position) to the second region (locking position). The locking state is maintained by mechanical self-locking. When the lifting force is continuous, the connecting rod 51 mechanism is in the dead point position or overload self-locking angle, and the external force cannot drive it in the opposite direction. When unloading, the reset element (such as the compression spring sleeved on the lifting rod 1) drives the reset, or the gravity of the lifting part 4 triggers the linkage component 5 to reset, and the locking member 3 is retracted and reset through the linkage component 5.

[0066] As shown in Figures 1 and 2, in an optional embodiment of this utility model, a guide portion 12 is provided on the circumferential surface of the boom 1. The locking member 3 is adapted to the guide portion 12 and moves in the first and second regions of the boom 1 by being guided by the guide portion 12. The guide path of the guide portion 12 is curved, straight, spiral, or other shapes that meet the needs of use.

[0067] It should be noted that the guide section 12, as the physical constraint structure for the movement path of the locking element 3, directly determines the motion trajectory characteristics through its shape design. Curved guides can be specifically embodied in parabolic grooves, involute cam tracks, etc., optimizing the acceleration of the locking element 3 through nonlinear paths; linear guides encompass T-slots, dovetail guides, or double-rod structures, ensuring high-rigidity linear displacement; helical guides include equidistant helical grooves, variable-pitch threads, or helical racks, converting rotary input into axial displacement. The mating forms between the locking element 3 and the guide section 12 include: slider and groove mating (e.g., a rectangular slider embedded in a T-slot), or ball bearing and guide rail mating. The machining method of the guide section 12 is not limited to machining; it can also employ integral casting, additive manufacturing composite structures, or modular assembly guide rails to meet different precision and cost requirements. The function of the guide section 12 is to convert the free movement of the locking element 3 into controlled directional movement. When an external force drives the locking component 3, it moves from the first region to the second region along a preset path (curved / straight / spiral). The motion characteristics are determined by the geometry of the guide section 12: the straight guide achieves pure translation, ensuring linear change in the radial dimension of the locking component 3; the spiral guide achieves two-dimensional displacement with a single degree of freedom input through the coupling of rotation and axial movement; the curved guide can achieve self-locking or force-enhancing effects in specific sections through path curvature design. Taking the spiral guide as an example, when the lifting part 4 rotates, it drives the locking component 3 to rotate around the axis of the lifting rod 1. The spiral groove converts the circumferential motion into axial propulsion, causing the locking component 3 to extend synchronously and rotate into the locking position. The limit stop set at the end of the path can enhance positional stability and avoid accidental displacement caused by lifting vibration. This solution ensures that the locking component 3 moves accurately to the locking position within the narrow lifting hole 20 through the forced trajectory constraint of the guide section 12, thereby improving the installation error tolerance while ensuring locking reliability.

[0068] As shown in Figure 5, in an optional embodiment of the present invention, the lifting part 4 includes a rotating body 41 and a first extension 42 and a second extension 43 extending from the rotating body 41 in different radial directions. The rotating body 41 is hinged to the lifting rod 1. The first extension 42 is used to connect with the lifting mechanism, and the second extension 43 is used to be fixedly or movably connected with the linkage component 5.

[0069] It should be noted that the hinge between the rotating body 41 and the lifting rod 1 is via a pivot pin. The first extension 42 serves as the connection end of the lifting mechanism, and its form includes a lifting ring, a U-hook, or a quick-release pin structure to meet the diverse connection needs of ropes, slings, or mechanical claws. The second extension 43 is generally movably connected to the linkage assembly 5, but when the linkage assembly 5 is an elastic torsion bar 52, the two can also be fixedly connected. The radial layout of the extension is not limited to vertical intersection (such as 90°), but can also be a Y-shaped 120° distribution or an asymmetrical bending structure, balancing the load distribution in different directions through geometric design. This invention optimizes motion transmission efficiency through the lever principle. During lifting, the lifting mechanism applies a pulling force to the first extension 42, driving the rotating body 41 to rotate around the hinge axis. The second extension 43 serves as the power output end, converting the rotational motion into the directional movement of the locking member 3 through the linkage assembly 5. The leverage effect of the double extensions significantly reduces the operating force requirement. When the lever arm length of the first extension 42 is greater than that of the second extension 43, a force-increasing effect can be achieved; conversely, the displacement stroke can be increased.

[0070] As shown in Figures 7, 8 and 9, in an optional embodiment of this utility model, along the radial direction of the lifting rod 1, the sum of the radial dimensions of the hook body 2 and the lifting rod 1 is less than the corresponding inner diameter of the lifting hole 20. When the locking member 3 moves to the second region, the sum of the radial dimensions of the hook body 2, the lifting rod 1 and the locking member 3 is greater than the corresponding inner diameter of the lifting hole 20.

[0071] It should be noted that during the insertion phase, the hook body 2 and the lifting rod 1 constitute the end of the lifting device 10 with a hook. Its maximum radial dimension is smaller than the minimum inner diameter of the lifting hole 20, ensuring smooth insertion even under zero-gap conditions. During the locking phase, the locking member 3 moves towards the second region, generating an additional radial extension, which overlaps with the dimensions of the hook body 2 / lifting rod 1. For example, the locking member 3 extends from the back side of the hook body 2, filling the gap between the hook body 2 and the hole wall; or it unfolds symmetrically from both sides of the lifting rod 1, forming multi-point jamming. For example, the rotation angle range of the lifting part 4 is 90° to 180°. When the first extension 42 is located at the second end of the lifting rod 1 and parallel to the lifting rod 1, the lifting part 4 is at a rotation angle of 180°. When the lifting part 4 rotates so that the first extension 42 is close to the first end of the lifting rod 1 and on the same side as the hook body 2, the rotation angle of the lifting part 4 is less than 180°.

[0072] As shown in Figures 1, 3 and 5, in an optional embodiment of this utility model, the rotation angle range of the lifting part 4 is a preset angle range, or the distance that the lifting part 4 slides along the axial direction of the lifting rod 1 is a predetermined displacement range, so as to limit the stroke of the locking member 3 to only move between the predetermined first region and the second region.

[0073] It should be noted that the rotation angle range is achieved through mechanical stops, sensor-triggered braking after position detection, or elastic locking structures. The axial sliding displacement range is achieved through travel limiters (end cap retaining rings, double nut locking) or limit blocks. It is worth noting that the adjustable range design allows for adaptation to different specifications of lifting holes 20, such as replacing limit pins of different lengths, adjusting the stop mounting hole positions, or digitally setting threshold parameters, forming a dynamic adaptation capability. This design, through a preset range, ensures that when the lifting part 4 reaches the rotation endpoint (e.g., 180°) or the sliding limit position, the locking member 3 precisely reaches the second area for mechanical locking. This process achieves closed-loop control through geometric kinematics. Taking the rotation scheme as an example, the dimensional chain calculation of the hinge point of the lifting rod 1, the length of the connecting rod 51, and the sliding groove of the locking member 3 ensures a strictly linear relationship between the rotation angle α of the lifting part 4 and the displacement S of the locking member 3.

[0074] As shown in Figure 10, in another optional embodiment of this utility model, the first region is the first side of the first end of the boom 1 and is located at the upper end of the hook 2; the linkage component 5 includes an elastic torsion bar 52 and a guide tube 521. The guide tube 521 is disposed on the boom 1, and the middle region of the elastic torsion bar 52 is constrained by the guide tube 521 to restrict the movement path. The linkage component 5 is the elastic torsion bar 52, which connects the lifting part 4 and the locking member 3. The locking member 3 is circumferentially rotatably connected to the boom 1.

[0075] When the lifting part 4 rotates or slides or rotates along the axial direction of the lifting rod 1, the locking member 3 is driven to rotate circumferentially along the lifting rod 1 by the elastic torsion bar 52, so that the locking member 3 can switch positions in the first region and the second region.

[0076] It should be noted that the first region is defined as the upper end of the first side of the first end of the boom 1 (i.e., the protruding side of the hook 2), which clarifies the clearance space for the locking member 3 in the released state. The circumferential rotational connection between the locking member 3 and the boom 1 can be achieved through a bushing fit and a ball bearing structure, ensuring stable rotation around the axis of the boom 1. The linkage assembly 5 uses an elastic torsion bar 52 as a transmission component. The elastic torsion bar 52 is an arc-shaped torsion bar, with its two ends fixedly connected to the lifting part 4 and the locking member 3, respectively. The guide tube 521 is spirally wound and fixed on the circumferential surface of the boom 1. The upper end of the guide tube 521 has a predetermined distance from the lifting part 4, and the lower end of the guide tube 521 also has a gap from the locking member 3. The guide tube 521 is used to guide the movement of the elastic torsion bar 52. When the elastic torsion bar 52 is subjected to force, it generates torque to drive the locking member 3 to rotate circumferentially. During lifting, the rotation or axial sliding of the lifting part 4 drives the elastic torsion bar 52 to twist, thereby causing the locking member 3 to rotate circumferentially around the axis of the boom 1. When the locking element 3 rotates from the first region (avoidance position) to the second region (locking position), its protruding part mechanically interferes with the inner wall of the lifting hole 20. The elastic torsion bar 52 plays a dual role in this process: firstly, it transmits torque to achieve motion conversion; secondly, it stores energy through elastic deformation. Maintaining the locked state relies on the residual torque of the torsion bar or the mechanical limit block to ensure no accidental rotation during lifting. Upon unloading, the torsion bar releases its stored elastic potential energy, automatically driving the locking element 3 to rotate in the opposite direction and reset to the first region.

[0077] As an optional embodiment of this utility model, the first region is the first side of the first end of the boom 1 and is located at the upper end of the hook 2. The locking member 3 is circumferentially rotatably connected to the boom 1. The radial dimension of the locking member 3 along the boom 1 is greater than or equal to the dimension of the hook 2, for example, as shown in Figure 11. Therefore, when the locking member 3 is located in the first region, the locking member 3 will abut against the side wall of the lifting hole 20 on one side of the hook 2, causing the hook 2 to retract from the state of hooking the lifting hole 20. Alternatively, when the hook 2 was originally hooked into the lifting hole 20, but when the locking member 3 moves to the first region, the hook 2 will disengage from the state of hooking the lifting hole 20. When the locking member 3 moves to the second region, since the locking member 3 will abut against the side wall of the other side of the lifting hole 20, the hook 2 will enter the state of hooking the lifting hole 20. This design, combined with the linkage component 5, enables the locking member 3 to automatically lock when the lifting device 10 is lifted. When the lifting device 10 is released from lifting, the locking member 3 automatically returns to the first area, causing the hook 2 to disengage from the lifting hole 20. When the lifting device 10 is removed from the lifting hole 20, it is not even necessary to manually remove it from the lifting hole 20, which greatly improves the lifting efficiency.

[0078] In some embodiments, the locking member 3 and the second region of the boom 1 can be secured by magnetic attraction or fasteners to prevent the locking member 3 from moving outside the first region.

[0079] As another optional embodiment of this utility model, when the locking member 3 is located in the second region, the radial cross-section of the locking member 3 and the lifting rod 1 should generally be matched with the inner diameter of the lifting hole 20 as much as possible. When the locking member 3 is located in the first region, the end of the lifting device 10 with the hook 2 should be less than or equal to or match the inner diameter of the lifting hole 20 so that it can be inserted into the lifting hole 20. That is, the cross-sectional profile of the end of the lifting device 10 near the hook 2 should be matched with the lifting hole 20 as much as possible. It should be understood that when the locking member 3 is located in the first region, if the end of the lifting device 10 with the hook 2 is larger than the inner diameter of the lifting hole 20, it is also acceptable to use the device if the end of the lifting device 10 with the hook 2 can be inserted into the lifting hole 20 at an angle.

[0080] As shown in Figure 11, in another optional embodiment of this utility model, the first region is the first side of the first end of the boom 1, and is located at the upper end of the hook 2; the linkage component 5 includes a motion conversion component 53, which includes a rotating sleeve 532, a transmission rod 533, and a rotating connecting member such as a bearing 531. The lifting part 4 is linearly slidably connected to the boom 1 and can slide along the axial direction of the boom 1. One of the inner ring and the outer ring of the bearing 531 is fixedly connected to the lifting part 4, and the other is fixedly connected to... The rotating sleeve 532 is fixedly connected, thereby allowing the lifting part 4 to be rotatably connected to the rotating sleeve 532. It should be understood that the lifting part 4 and the rotating sleeve 532 can also be directly rotatably connected coaxially. A spiral guide rail is provided on the circumferential surface of the lifting rod 1 in the axial direction. The inner wall of the rotating sleeve 532 is adapted to the spiral guide rail of the lifting rod 1. A limit groove 31 is provided at the upper end of the locking member 3. The rotating sleeve 532 extends into the limit groove 31 through the transmission rod 533. The locking member 3 is rotatably connected to the lifting rod 1 in the circumferential direction. When the lifting part 4 drives the rotating sleeve 532 to move downward under the action of gravity, the rotating sleeve 532, due to its engagement with the lifting rod 1 via a spiral guide rail, rotates while moving downward. The rotating sleeve 532 then drives the locking member 3 to rotate around the lifting rod 1 via the transmission rod 533. When the locking member 3 moves from the first region to the second region, the transmission rod 533 happens to move to the bottom of the limiting groove 31, and the locking member 3 remains in the second region. Conversely, when… When the lifting part 4 drives the rotating sleeve 532 to move upward under the action of the lifting force, the rotating sleeve 532 is engaged with the lifting rod 1 through the spiral guide rail, so that the rotating sleeve 532 moves upward and rotates at the same time. The rotating sleeve 532 drives the locking member 3 to rotate around the lifting rod 1 through the transmission rod 533. When the locking member 3 moves from the second area to the first area, the lifting part 4 just moves to the top of the lifting rod 1 and is limited by the lifting rod 1, and the locking member 3 stays in the first area.

[0081] The conduit 521 is disposed on the boom 1. The middle region of the elastic torsion bar 52 is constrained by the conduit 521 to restrict the movement path. The linkage component 5 is the elastic torsion bar 52. The elastic torsion bar 52 connects the lifting part 4 and the locking member 3. The locking member 3 is circumferentially rotatably connected to the boom 1.

[0082] When the lifting part 4 rotates or slides or rotates along the axial direction of the lifting rod 1, the locking member 3 is driven to rotate circumferentially along the lifting rod 1 by the elastic torsion bar 52, so that the locking member 3 can switch positions in the first region and the second region.

[0083] As another optional embodiment of this utility model, the rotational connection between the locking member 3 and the lifting rod 1 can be improved by applying lubricating oil, using a bearing for rotational connection, or using ball bearings to enhance rotational flexibility. Similarly, the movement between the lifting part 4 and the lifting rod 1, such as rotation, can be improved by using a bearing or ball bearing connection. The helical connection between the rotating sleeve 532 and the lifting rod 1 can also be improved by applying lubricating oil or by using ball bearings or sliders to enhance movement flexibility.

[0084] This utility model provides a lifting device for a battery pack, including the aforementioned lifting device 10, as well as a tray and a lifting mechanism;

[0085] The tray is used to carry the battery pack, and the tray is provided with a lifting hole 20; the lifting mechanism is directly or indirectly connected to the second end of the lifting rod 1 of the lifting device 10; when the lifting mechanism lifts the tray, the lifting device 10 passes through the lifting hole 20 of the tray, and the hook 2 abuts against the bottom of the lifting hole 20 or the inner wall bearing surface of the vertical downward surface, and the locking member 3 passes through the lifting hole 20.

[0086] It should be noted that this lifting device, with the lifting device 10 as its core, integrates a pallet and lifting mechanism to form a complete lifting system. The lifting mechanism is either a crane or a lifting rope. The lifting hole 20 of the pallet has two typical implementation methods: one is a through-hole; the other is a stepped hole with an inner step, allowing the upper surface of the hook 2 to bear the load. The connection between the lifting mechanism and the second end of the lifting rod 1 is not limited to a direct connection of wire rope and can be extended to a quick-change interface for a robotic arm. The cooperation mechanism between the lifting device 10 and the lifting hole 20 must meet dual constraints: the hook 2 bears the main load by abutting the bottom or inner step of the lifting hole 20 on its vertically downward surface; the locking member 3 expands radially after penetrating the lifting hole 20 to form an anti-detachment restraint. In particular, the insertion shape of the locking member 3 can be optimized as a segmented wedge block or an eccentric wheel assembly to ensure that the locking force is maintained under battery pack vibration conditions.

[0087] During lifting, the vertical contact between the hook 2 and the bottom of the lifting hole 20 forms the main load-bearing path, directly transmitting the weight of the battery pack to the lifting rod 1. The radial expansion of the locking member 3 inside the lifting hole 20 provides anti-detachment functionality, resisting lateral impacts or accidental tilting through mechanical interference. Vertical load-bearing ensures system rigidity, while lateral locking provides safety redundancy. When the lifting mechanism operates, the weight of the lifting device 10 causes the hook 2 to automatically fall and contact the bottom of the lifting hole 20. Simultaneously, the lifting force triggers the linkage component 5 to drive the locking member 3 to expand, achieving synchronous self-triggering of load-bearing and locking. During unloading, the weight disappears, and the reset element causes the locking member 3 to retract, allowing at least a portion of the lifting device 10 to be vertically withdrawn.

[0088] As an optional embodiment of this utility model, along the axial direction of the lifting rod 1, an axial guide structure 32 is provided between the locking member 3 and the lifting hole 20. For example, a flared guide cover is provided at the upper end of the lifting hole 20. For example, along the axial direction of the lifting rod 1, a tip guide structure is provided at one end of the locking member 3 facing the second end of the lifting rod 1, and the length of the tip guide structure in the axial direction of the lifting rod 1 is less than the depth of the lifting hole 20.

[0089] The axial guide structure optimizes the alignment accuracy between the lifting device 10 and the lifting hole 20 through complementary design. The guide cover, serving as the guiding component at the upper end of the lifting hole 20, is not limited to a trumpet shape; it can be extended to a conical funnel, an elastic silicone guide sleeve, or an openable petal structure, correcting initial insertion deviation through a gradually expanding inlet. The guiding design of the locking element 3 tip includes two lower-level implementation methods: one is a conical guide head, achieving 360° self-centering; the other is a wedge-shaped inclined surface, preferentially guiding alignment in a specific direction. The constraint that the tip length is less than the depth of the lifting hole 20 ensures that the locking element 3 body only begins its expansion action after fully entering the hole, avoiding accidental triggering midway.

[0090] When installing in confined spaces, traditional lifting devices 10 require repeated adjustments to their angle to align with the lifting hole 20, which is time-consuming and can easily scratch the hole wall. This solution achieves blind insertion through an axial guide structure: even if the initial position of the lifting device 10 is slightly off from the lifting hole 20, it can still automatically slide into the correct path through the conical surface or the inclined tip of the guide cover.

[0091] As an optional embodiment of this utility model, the second side of the boom 1 is provided with an axially extending guide groove, and the locking member 3 is provided with a guide protrusion that cooperates with the guide groove. The guide protrusion restricts the locking member 3 to slide only along the axial direction of the boom 1.

[0092] As an optional embodiment of this utility model, the reset element is a spring, one end of which is fixed to the rod 1 and the other end is connected to the locking member 3. When the force exerted by the linkage component 5 on the locking member 3 is released, the elastic force of the spring drives the locking member 3 to reset.

[0093] As an optional embodiment of this utility model, the hook body 2 is integrally formed with the lifting rod 1, and the bending angle of the hook body 2 is 90° to 180°.

[0094] The lifting device 10 of this utility model mainly consists of a lifting part 4, a lifting rod 1, a hook body 2, a locking part 3, a linkage component 5, and screws, etc., to ensure that the locking part 3, the linkage component 5, and the lifting part 4 can move freely without obstruction after assembly. In actual use, the upper round hole of the lifting part 4 under force is connected to the lifting rope and the crane.

[0095] The working principle of the lifting device 10 of this utility model is as follows: When a battery pack needs to be lifted (here, a lifting point position is used as an example); rotate the lifting part 4 to keep it perpendicular to the lifting rod 1 at 90°. At this time, the locking part 3 moves upward, and the end of the lifting device 10 with the hook 2 is inserted into the bottom of the lifting hole 20 of the battery pack housing to be lifted; as shown in Figure 7; rotate the lifting part 4 to keep it perpendicular to the lifting rod 1 at 180°. The lifting part 4 drives the linkage component 5 to push the locking part 3 downward and insert it into the battery pack lifting hole 20, as shown in Figure 8; since the locking part 3 is stuck in the lifting rod 1 and the battery pack lifting hole 20, and during the lifting process, due to gravity, the lifting part 4 and the lifting rod 1 always maintain 180°, to prevent the lifting device 10 from falling out of the battery pack lifting hole 20 during the lifting process, as shown in Figure 9; after the lifting is completed, rotate the lifting part 4 to keep it perpendicular to the lifting rod 1 at 90°. At this time, the locking part 3 moves upward, and the lifting device 10 is removed. The lifting is now complete.

[0096] In summary, this utility model effectively overcomes some practical problems in the prior art, thus having high utilization value and significance.

[0097] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A lifting device, characterized in that, The spreader is used to lift goods with lifting holes or pallets loaded with goods. The spreader includes: a boom, including a first end and a second end for direct or indirect connection with a lifting mechanism; a hook, fixed to the first end of the boom and protruding towards a first side of the boom; and a locking member, movably disposed on the boom, and the locking member is configured to move between a first region and a second region on the boom, the second region being a second side of the first end of the boom, the second side of the boom being opposite to the first side, and the first region being a region other than the second region on the boom. When the end of the spreader with the hook is installed in the lifting hole and the locking member is located in the second region, the spreader is prevented from disengaging from the lifting hole.

2. The lifting device according to claim 1, characterized in that, The lifting device further includes: a lifting part, hinged to or slidably connected to the boom along the axial direction of the boom, the boom being connected to the lifting mechanism via the lifting part; a linkage assembly, drivingly connecting the lifting part and the locking member, the linkage assembly being configured to convert the rotation or sliding of the lifting part into the axial movement and / or circumferential rotation of the locking member along the boom; when the lifting part is driven to rotate or slide relative to the boom during lifting, the lifting part drives the locking member to move from a first region of the boom to a second region of the boom via the linkage assembly; and / or when the lifting force is released, the locking member is reset to the first region via the linkage assembly or a reset element.

3. The lifting device according to claim 2, characterized in that, The lifting part is hinged to the second end of the boom. The linkage assembly includes a connecting rod, one end of which is hinged to the lifting part and the other end of which is hinged to the locking member. When the lifting part rotates, the connecting rod drives the locking member to slide along the axial direction of the boom, so that the locking member can switch between the positions of the first region and the second region.

4. The lifting device according to claim 2, characterized in that, The first region is the first side of the first end of the boom and is located at the upper end of the hook body; the linkage assembly includes an elastic torsion bar and a guide tube. The guide tube is disposed on the boom, and the middle region of the elastic torsion bar constrains the movement path through the guide tube. The elastic torsion bar connects the lifting part and the locking member, and the locking member is circumferentially rotatably connected to the boom; when the lifting part rotates or slides or rotates along the boom axis, the elastic torsion bar drives the locking member to rotate circumferentially along the boom, so that the locking member can switch between the positions of the first region and the second region.

5. The lifting device according to claim 1, characterized in that, A guide portion is provided on the circumferential surface of the boom, and the locking member is adapted to the guide portion and moves in the first and second regions of the boom through the guide portion.

6. The lifting device according to claim 2, characterized in that, The lifting part includes a rotating body and a first extension and a second extension extending from the rotating body in different radial directions. The rotating body is hinged to the boom. The first extension is used to connect with the lifting mechanism, and the second extension is used to connect or movably connect with the linkage assembly. When the first extension is parallel to the boom and located at the upper end of the boom, the locking member is located in the second region.

7. The lifting device according to claim 2, characterized in that, The rotation angle range of the lifting part is a preset angle range, or the distance that the lifting part slides along the axial direction of the lifting rod is a predetermined displacement range, so as to limit the stroke of the locking member to only move between the predetermined first region and the second region.

8. The lifting device according to claim 1, characterized in that, Along the radial direction of the boom, the sum of the radial dimensions of the hook and the boom is less than the corresponding inner diameter of the lifting hole. When the locking member moves to the second region, the sum of the radial dimensions of the hook, the boom, and the locking member is greater than the corresponding inner diameter of the lifting hole.

9. A lifting device for a battery pack, characterized in that, The lifting device includes the lifting device according to any one of claims 1-8, and: a tray for carrying a battery pack, the tray having a lifting hole; a lifting mechanism directly or indirectly connected to the second end of the lifting rod of the lifting device; when the lifting mechanism lifts the tray, the lifting device passes through the lifting hole of the tray, and the hook abuts against the bottom of the lifting hole or the inner wall bearing surface on its vertically downward surface, and the locking member passes through the lifting hole.

10. The battery pack lifting device according to claim 9, characterized in that, Along the axial direction of the boom, the locking member is provided with an axial guide structure between itself and the lifting hole.

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