Electric jacking device

Abstract

The utility model discloses an electric jacking device, which belongs to the technical field of electric tools, and comprises a base, a top seat, a telescopic module, an actuating module and a casing, and the telescopic module is arranged between the base and the top seat and used for driving the top seat to ascend or descend relative to the base. The actuating module is used for providing actuating torque for the telescopic module so as to enable the telescopic module to extend or retract, the actuating module is arranged between the telescopic module and the base, the actuating module comprises a motor and a reduction gearbox arranged at the top of the motor, and a supporting piece located at least partially outside the actuating module is arranged in the machine shell; the supporting piece is used for at least preventing the motor from bearing load force. Automatic lifting of the device is achieved in an electric mode, manual operation of a user is not needed, and the operation safety when the device lifts a heavy object is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of power tool technology, and in particular to an electric lifting device. Background Technology

[0002] In production and daily life, it is often necessary to use lifting devices to lift heavy objects. Existing lifting devices generally require manual operation by the user, such as hydraulic jacks. When the lifting device malfunctions and descends rapidly, the user is easily crushed, which can lead to serious personal injury or equipment accidents. Therefore, how to improve the operability and installation of heavy object lifting is an urgent problem to be solved. Utility Model Content

[0003] To address the shortcomings and deficiencies of the existing technology, this utility model provides an electric lifting device that achieves automatic lifting and lowering of the device via electric means, eliminating the need for manual operation by the user. This greatly improves the operational safety of the device when lifting heavy objects and also avoids damage to the motor due to overload.

[0004] To achieve the above-mentioned technical objectives, the electric lifting device provided by this utility model includes: a base; a top seat disposed above the base; a telescopic module disposed between the base and the top seat and used to drive the top seat to rise or fall relative to the base; an actuation module used to provide actuating torque to the telescopic module to extend or shorten the telescopic module; and a housing disposed between the base and the top seat, wherein at least a portion of the telescopic module and at least a portion of the actuation module are housed within the housing; the actuation module is disposed between the telescopic module and the base, and the actuation module includes a motor and a reduction gearbox disposed on top of the motor; a support member located on the outer side of at least a portion of the actuation module is provided inside the housing, and the support member is used to at least prevent the motor from bearing a load force.

[0005] Preferably, the support member is located outside the motor, the lower end of the telescopic module directly or indirectly abuts against the housing, the housing directly or indirectly abuts against the upper end of the support member, and the lower end of the support member directly or indirectly abuts against the base.

[0006] Preferably, the support member is located outside the motor and the gearbox, the lower end of the telescopic module directly or indirectly abuts against the upper end of the support member, and the lower end of the support member directly or indirectly abuts against the base.

[0007] Preferably, a connecting structure is provided between the lower end of the housing and the base to connect the two, and the lower end of the support abuts against the connecting structure.

[0008] Preferably, the connection structure includes a lower connector at the lower end of the housing and a lower connector sleeve on the base, with the lower end of the support abutting against the lower connector.

[0009] Preferably, the lower connector and the lower connecting sleeve are detachably connected by a threaded connection; and / or, the lower connector includes a connecting part that mates with the lower connecting sleeve and a positioning part located on the top of the connecting part, the outer diameter of the positioning part being larger than the outer diameter of the connecting part, and the lower end of the support abutting against the positioning part and being limited.

[0010] Preferably, the telescopic module includes a lead screw, a nut, an inner tube, and an outer tube. The lower end of the lead screw is connected to the torque output component of the gearbox and can rotate around its own central axis. The nut is sleeved on the lead screw and can move axially relative to the lead screw. The inner tube is sleeved outside the lead screw with its lower end connected to the nut. The top seat is connected to the upper end of the inner tube. The outer tube is sleeved outside the inner tube with its position set.

[0011] Preferably, the motor, gearbox, and telescopic module are arranged with their axes overlapping.

[0012] Preferably, the support member is plate-shaped and has several members spaced apart along the circumference of the actuation module; or, the support member is cylindrical.

[0013] Preferably, the electric lifting device further includes a battery pack, which is detachably attached to the housing; and / or, the electric lifting device further includes an extension rod, which is detachably attached between the telescopic module and the top seat and / or detachably attached between the housing and the base.

[0014] By adopting the above technical solution, this utility model has the following advantages:

[0015] 1. The electric lifting device provided by this utility model has a telescopic module that can extend or retract under the drive of an actuating torque. The change in the length of the telescopic module causes the top seat to rise or fall relative to the base, thereby allowing the heavy object supported by the device to rise or fall. Automatic lifting and lowering of the device is achieved electrically, eliminating the need for manual operation by the user and greatly improving operational safety when lifting heavy objects. An actuating module is located between the telescopic module and the base, and includes a motor and a reduction gearbox. The motor outputs actuating torque to the telescopic module through the reduction gearbox. A support component is installed inside the housing, located at least partially outside the actuating module. This support component prevents the motor of the actuating module from bearing load, avoiding damage to the motor and ensuring the structural and performance stability of the motor, thereby guaranteeing the overall service life and performance stability of the device.

[0016] 2. The support component can be located only outside the motor. In this case, the lower end of the telescopic module directly or indirectly abuts against the housing, the housing directly or indirectly abuts against the upper end of the support component, and the lower end of the support component directly or indirectly abuts against the base. When the device supports heavy objects, the load force borne by the top seat can be transferred downward to the base through the telescopic module, housing, and support component, thereby achieving the purpose of preventing the motor from bearing the load force.

[0017] 3. The support can also be located outside the motor and gearbox. In this case, the lower end of the telescopic module directly or indirectly abuts against the upper end of the support, and the lower end of the support directly or indirectly abuts against the base. The load force borne by the top seat can be transferred downward to the base through the telescopic module and the support, thereby preventing the motor from bearing the load force.

[0018] 4. The lower end of the housing is connected to the base via a connecting structure, and the lower end of the support abuts against the connecting structure. Further, the connecting structure includes a lower connector and a lower connecting sleeve, with the lower end of the support abutting against the lower connector. By rationally configuring the connection relationship between the housing and the base, and the abutment relationship between the support and the base, the support indirectly abuts against the base, and the load force borne by the support can be transferred to the base through the connecting structure.

[0019] 5. The lower connector and the lower connecting sleeve are preferably connected by a threaded connection to achieve a detachable connection. The threaded connection between the lower connector and the lower connecting sleeve ensures the structural stability when the housing and the base are connected together, and also facilitates replacement when the base is damaged.

[0020] The lower connector includes a connecting part and a positioning part. The outer diameter of the positioning part is larger than the outer diameter of the connecting part. The lower end of the support member is restrained by abutting against the positioning part. The positioning part reasonably increases the contact area between the support member and the lower connector, and also restrains the support member. On the one hand, it improves the structural stability of the support member, and on the other hand, it can also prevent the support member or the lower connector from undergoing load deformation.

[0021] 6. The coaxial arrangement of the motor, gearbox, and telescopic module is preferably coincident. On the one hand, this can reasonably simplify the transmission and coordination structure between the motor and the gearbox and between the gearbox and the telescopic module. On the other hand, it can also reasonably reduce the radial dimension of the device, making the overall structure of the device more compact.

[0022] 7. The support components can be plate-shaped, in which case several support components are spaced apart along the circumference of the actuation module; the support components can also be cylindrical. The shape and distribution of the support components should be rationally designed to ensure that they meet the structural requirements for preventing the motor from bearing load forces.

[0023] 8. The device is preferably powered by a battery pack, which facilitates the reasonable expansion of the device's applicable scenarios and ensures that the device's applicability is not limited by the location of the power plug.

[0024] The device can also be equipped with an extension rod, which can be installed between the telescopic module and the top base, or between the housing and the base. The extension rod can effectively expand the lifting height range of the device, and users can decide whether to install the extension rod according to their specific work needs. Attached Figure Description

[0025] Figure 1 This is a complete diagram of the electric lifting device in Embodiment 1;

[0026] Figure 2 This is a structural diagram of the electric lifting device in Example 1 when the battery pack is not installed;

[0027] Figure 3 This is a side view of the electric lifting device in Embodiment 1;

[0028] Figure 4 This is a cross-sectional view of the electric lifting device in Embodiment 1 along the left-right direction;

[0029] Figure 5 This is a cross-sectional view of the electric lifting device in Embodiment 1 along the front-to-back direction;

[0030] Figure 6 This is a cross-sectional view of a portion of the structure of the electric lifting device in Embodiment 1;

[0031] Figure 7 This is a partial structural diagram of the electric lifting device in Embodiment 1;

[0032] Figure 8 This is a structural diagram of the support member and the lower connector in Embodiment 1;

[0033] Figure 9 This is a schematic diagram of the electrical control system for the electric lifting device in Example 1;

[0034] Figure 10 This is a schematic diagram of the electric lifting device used to support heavy objects in Embodiment 1;

[0035] Figure 11 This is a flowchart illustrating the working method in Example 1;

[0036] Figure 12 This is a communication diagram illustrating the coordinated operation of multiple electric lifting devices in Example 1.

[0037] Figure 13 This is a sectional view of a portion of the structure of the electric lifting device in Embodiment 2 when the support component adopts the first specific scheme;

[0038] Figure 14 This is a sectional view of a portion of the structure of the electric lifting device in Embodiment 2 when the support component adopts the second specific scheme;

[0039] Figure 15 This is a structural diagram of the electric lifting device in Example 3;

[0040] Figure 16 This is a structural diagram of the top seat, extension rod, and partial telescopic module in Embodiment 3;

[0041] Figure 17This is a structural diagram of the base, extension rod, and partial casing in Embodiment 3;

[0042] Figure 18 This is a flowchart illustrating the working method in Example 4;

[0043] Figure 19 This is a communication diagram illustrating the coordinated operation of multiple electric lifting devices in Example 4.

[0044] Figure 20 This is a flowchart illustrating the working method in Example 5;

[0045] Figure 21 This is a communication diagram illustrating the coordinated operation of multiple electric lifting devices in Example 5.

[0046] In the diagram, 10-electric lifting device, 10A-first-stage device, 10B-second-stage device, 101-connecting structure, 100-base, 110-lower connecting hole, 120-lower connecting sleeve, 130-first elastic pad, 200-top seat, 210-upper connecting hole, 220-upper connecting sleeve, 230-cover, 240-second elastic pad, 300-telescopic module, 310-lead screw, 320-nut, 330-inner tube, 340-outer tube, 351-first detection piece, 352-second detection piece, 360-support plate, 370-end cap, 380-limiting gasket, 400-actuation module, 410-motor, 411-shaft, 420-reduction gearbox, 421-reduction structure, 422-box body, 4221-box shell, 42 22-Lid, 4223-Groove, 4224-Raised Edge, 430-Torque Output Component, 431-Output Shaft, 440-Sun Gear, 450-Support Plate, 500-Housing, 510-Receiver, 520-Lower Connector, 521-Connector, 522-Positioning Part, 523-Positioning Block, 530-Rib Plate, 600-Battery Pack, 710-Control Board, 720-Operating Board, 730-Operating Component, 740-Main Control Button, 750-Wireless Communication Unit, 800-Support Component, 810-Support Part, 910-Transmission Unit, 911-Drive Wheel, 912-Driven Wheel, 920-Outer Housing, 921-Upper Housing, 922-Lower Housing, 1000-Extension Rod, 1010-External Thread Section, 1020-Internal Thread Section

[0047] 20 - Heavy object, 30 - Control terminal. Detailed Implementation

[0048] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be understood that the terms "upper," "lower," "left," "right," "longitudinal," "lateral," "inner," "outer," "vertical," "horizontal," "top," and "bottom," etc., which indicate orientation or positional relationship, are based solely on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device / component referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Example 1

[0049] Combination Figures 1 to 9 The electric lifting device 10 provided in Embodiment 1 of this utility model includes:

[0050] Base 100;

[0051] Top seat 200, which is located above base 100;

[0052] Telescopic module 300 is disposed between base 100 and top seat 200 and is used to drive top seat 200 to rise or fall relative to base 100.

[0053] Actuation module 400 is used to provide actuating torque to telescopic module 300 to extend or shorten telescopic module 300;

[0054] A housing 500 is disposed between a base 100 and a top seat 200, and at least a portion of the telescopic module 300 and at least a portion of the actuation module 400 are housed within the housing 500.

[0055] The actuation module 400 is located between the telescopic module 300 and the base 100. The actuation module 400 includes a motor 410 and a reduction gearbox 420 located on top of the motor 410. The housing 500 has a support member 800 located on at least part of the outer side of the actuation module 400. The support member 800 is used to at least prevent the motor 410 from bearing the load force.

[0056] The telescopic module 300 can extend or retract under the drive of the actuating torque. The change in length of the telescopic module 300 causes the top seat 200 to rise or fall relative to the base 100, thereby allowing the supported load to rise or fall. Automatic lifting and lowering of the device is achieved electrically, eliminating the need for manual operation and significantly improving operational safety when lifting heavy objects. A support member 800 is installed inside the housing 500, located at least partially on the outer side of the actuating module 100. The support member 800 at least prevents the motor 410 of the actuating module 400 from bearing load, avoiding damage to the motor 410 under load, ensuring the structural and performance stability of the motor 410, and thus guaranteeing the overall service life and performance stability of the device.

[0057] In this embodiment, the device is preferably powered by a battery pack 600. The device's application location is not limited by the power supply, effectively expanding its applicable scenarios. The battery pack 600 is preferably detachably attached to the housing 500. When attached to the housing 500, the center of gravity of the battery pack 600 is located within the vertical projection range of the base 100. By rationally setting the positional relationship between the battery pack 600 and the base 100, the battery pack 600 is kept as close as possible to the center of the base 100, allowing the device to be placed stably. This avoids situations where the device's center of gravity deviates from the center of the base due to the battery pack 600 being too far away, which could easily cause the device to tip over. This improves the device's stability when supporting heavy objects and also enhances its stability when lifting heavy objects.

[0058] Combination Figure 1 , Figure 2 In this embodiment, both the base 100 and the top seat 200 are plate-shaped or block-shaped with a certain area. The telescopic module 300, the actuation module 400, the housing 500 and the battery pack 600 are arranged between the top seat 200 and the base 100 in the height direction. The lower end of the housing 500 is connected to the base 100. The actuation module 400 extends upward from the housing 500. The top seat 200 is connected to the movable part of the telescopic module 300.

[0059] Combination Figure 3 Point G represents the center of gravity of the battery pack 600, and lines L1 and L2 represent the vertical projection range of the base 100. Point G lies horizontally between lines L1 and L2, thus ensuring that the center of gravity of the battery pack 600 is within the vertical projection range of the base 100 when the battery pack 600 is attached to the housing 500. Furthermore, Figure 3 In the diagram, line L3 represents the center line of base 100, and point G represents the center of gravity of battery pack 600 located between lines L2 and L3. That is, battery pack 600 attached to housing 500 is offset relative to base 100 and the center of gravity of battery pack 600 is located within the vertical projection range of base 100.

[0060] Furthermore, when the battery pack 600 is attached to the housing 500, the battery pack 600 is preferably located within the vertical projection range of the base 100, so that the battery pack 600 attached to the housing 500 is as close as possible to the center of the base 100, thereby further improving the stability of the device. Combined with Figure 3When the battery pack 600 is attached to the housing 500, the vertical projection of the battery pack 600 lies entirely between lines L2 and L3, thus placing the entire battery pack 600 within the vertical projection range of the base 100. Of course, in other specific embodiments of this application, when the battery pack 600 is attached to the housing 500, only a portion of the battery pack 600 near the center of the base 100 may be within the vertical projection range of the base 100, while the portion of the battery pack 600 deviating from the center of the base 100 may be outside the vertical projection range of the base 100.

[0061] In this embodiment, the side of the housing 500 is provided with a receiving portion 510 that cooperates with the battery pack 600. The battery pack 600 is detachably attached to the side of the housing 500 through cooperation with the receiving portion 510. Furthermore, when the battery pack 600 is attached to the housing 500, the battery pack 600 is installed at the receiving portion 510 from top to bottom. This can prevent the battery pack 600 from becoming loose relative to the housing 500 when the device is being transported or when the device is operating, effectively improving the stability of the battery pack 600 when attached to the housing 500. As an optional solution in this embodiment, the housing 500 can adopt a left-right split housing structure, and the receiving portion 510 can be located on the left or right side of the housing 500.

[0062] In this embodiment, the receiving part 510 is preferably located at the lower part of the side wall of the housing 500. When the battery pack 600 is attached to the housing 500, it is also located at the lower part of the housing 500. This allows the battery pack 600 attached to the housing 500 to be positioned lower relative to the housing 500, which can reasonably lower the center of gravity of the device as a whole, thereby improving the stability of the device when placed alone or when supporting heavy objects.

[0063] Furthermore, when the battery pack 600 is attached to the housing 500, the center of gravity of the battery pack 600 preferably does not exceed the height center of the electric lifting device 10 in its initial state. When the length of the telescopic module 300 is at its shortest, the distance between the top seat 200 and the base 100 in the height direction is also at its minimum, at which point the device is in its initial state. Figure 3 In the diagram, line L4 represents the height centerline of the device in its initial state. When the battery pack 600 is attached to the housing 500, the center of gravity of the battery pack 600, indicated by point G, is below line L4, or the center of the battery pack 600, indicated by point G, is on line L4. Furthermore, when the battery pack 600 is attached to the housing 500, the entire battery pack 600 does not exceed line L4, meaning the entire battery pack 600 does not exceed the height centerline of the device in its initial state. This lowers the overall center of gravity of the device, improving its stability when placed alone or supporting heavy objects. It also prevents the top mount 200 from interfering with the attachment of the battery pack 600.

[0064] In this embodiment, the centers of the top seat 200 and the base 100 are preferably aligned, and the top seat 200 is preferably located within the vertical projection range of the base 100. By rationally setting the positional relationship between the top seat 200 and the base 100, the weight of the load can be transferred downwards to the base 100 through the top seat 200, improving the overall load balance of the device and thus enhancing its stability in supporting heavy loads. This prevents the device from tipping over or being damaged due to an imbalance in load-bearing capacity caused by the top seat 200 deviating from the base 100. Specifically, in this embodiment, the top seat 200 and the base 100 are basically the same in shape and size; therefore, their vertical projections are also basically aligned. Of course, in other embodiments of this application, the lateral area of ​​the top seat 200 can be smaller than the lateral area of ​​the base 100, thus making the vertical projection range of the top seat 200 smaller than that of the base 100; furthermore, the shapes of the top seat 200 and the base 100 can be different. In other specific embodiments of this application, the centers of the top seat 200 and the base 100 can also be offset by a certain distance.

[0065] Combination Figure 4 , Figure 5In this embodiment, the telescopic module 300 includes a lead screw 310, a nut 320, an inner tube 330, and an outer tube 340. The lead screw 310 is axially vertical and can rotate around its own central axis under the actuation of the actuation module 400. The nut 320 is threaded onto the lead screw 310 and can move axially relative to the lead screw 310. The inner tube 330 is sleeved outside the lead screw 310 with its lower end connected to the nut 320. The top seat 200 is connected to the upper end of the inner tube 330. The outer tube 340 is sleeved outside the inner tube 330 with its position set. When the lead screw 310 rotates around a first direction, the rotating lead screw 310 drives the nut 320 to move upward through the threaded engagement. The upward-moving nut 320 drives the top seat 200 to move upward synchronously through the inner tube 330. The upward-moving top seat 200 can lift the weight supported by the device. When the lead screw 310 rotates in a second direction opposite to the first direction, the rotating lead screw 310 drives the nut 320 downward through the threaded engagement. The downward-moving nut 320 drives the top seat 200 downward synchronously through the inner tube 330. The downward-moving top seat 200 can lower the weight supported by the device or return the entire device to its initial state. One of the first and second directions is clockwise, and the other is counterclockwise. Specifically, the lower end of the inner tube 330 can be fixedly sleeved on the outside of the nut 320 to achieve the connection between the inner tube 330 and the nut 320. The lower end of the inner tube 330 can also be connected to the nut 320 by fasteners or other means. This embodiment does not limit the specific connection method between the inner tube 330 and the nut 320. The connection between the lower end of the inner tube 330 and the nut 320 can enable the two to move synchronously. Alternatively, the connection between the inner tube 330 and the nut 320 can be used to subject the nut 320 to circumferential constraints, so that the nut 320 only moves axially when the screw 310 rotates, and does not rotate circumferentially, thereby ensuring that the device can smoothly drive the supported heavy object to lift and lower during operation.

[0066] Combination Figure 4The electric lifting device 10 also includes a control board 710 disposed within the housing 500. Furthermore, to control the extension and retraction stroke of the telescopic module 300, the telescopic module 300 also includes a first detection element 351 and a second detection element 352 disposed within the outer tube 340 via a support plate 360. Both the first detection element 351 and the second detection element 352 are signal-connected to and / or electrically connected to the control board 710. The control board 710 can control the actuation module 400 based on the signals fed back from the first detection element 351 and the second detection element 352. In this embodiment, the support plate 360 ​​is elongated and vertically positioned within the outer tube 340 and outside the inner tube 330. The first detection element 351 and the second detection element 352 are respectively disposed at the upper and lower ends of the support plate 360. When the nut 320 and inner tube 330 move upwards until the first detection element 351 is triggered, the control board 710 determines, based on the trigger signal fed back by the first detection element 351, that the nut 320 and inner tube 330 have moved to their extreme upward position. The control board 710 then commands the actuation module 400 to stop actuating or reverse actuation, thereby preventing the nut 320 and inner tube 330 from continuing to move upwards. When the nut 320 and inner tube 330 move downwards until the second detection element 352 is triggered, the control board 710 determines, based on the trigger signal fed back by the second detection element 352, that the nut 320 and inner tube 330 have moved to their extreme downward position. The control board 710 then commands the actuation module 400 to stop actuating or reverse actuation, thereby preventing the nut 320 and inner tube 330 from continuing to move downwards. Specifically, the first detection element 351 and the second detection element 352 can be microswitches. In this case, a protrusion for triggering the microswitch can be provided on the nut 320 or the inner tube 330, or the microswitch can be triggered by the part of the nut 320 exposed outside the inner tube 330. The first detection element 351 and the second detection element 352 can also be magnetic sensors such as reed switches or Hall effect sensors. In this case, a magnet for triggering the magnetic sensor can be provided on the nut 320 or the inner tube 330. The first detection element 351 and the second detection element 352 can also be photoelectric sensors. In this case, a structure for triggering the photoelectric sensor can be provided on the nut 320 or the inner tube 330. This embodiment does not specifically limit the specific type or model of the first detection element 351 and the second detection element 352, as long as the stroke detection requirements of the telescopic module 300 are met. The types of the first detection element 351 and the second detection element 352 can be the same or different.

[0067] In this embodiment, the lower part of the outer tube 340 is located inside the housing 500. Multiple spaced ribs 530 are provided on the inner wall of the housing 500 to radially constrain the outer tube 340 and the actuation module 400, thereby improving the structural stability of the related components. The telescopic module 300 also includes an end cap 370 fixed to the upper end of the outer tube 340. The end cap 370 is simultaneously fitted onto the outside of the inner tube 330 with a clearance fit. On the one hand, the end cap 370 covers the upper end of the outer tube 340 to prevent external dirt from falling into the interior of the telescopic module 300; on the other hand, the end cap 370 radially constrains the inner tube 330 to prevent radial displacement of the inner tube 330 during operation, thus ensuring the movement stability of the telescopic module 300. In addition, a limiting washer 380 is fixed to the upper end of the lead screw 310 by a screw. The outer diameter of the limiting washer 380 is larger than the outer diameter of the lead screw 310 and slightly smaller than the inner diameter of the inner tube 330. The clearance fit between the limiting washer 380 and the inner tube 330 makes the lead screw 310 radially constrained, preventing the lead screw 310 from radially deviating when the device is working, thereby ensuring the movement stability of the telescopic module 300.

[0068] Combination Figure 6 In this embodiment, the actuation module 400 is provided with a torque output component 430. The actuation module 400 outputs torque to the lead screw 310 through the torque output component 430, thereby causing the lead screw 310 to rotate in a first direction or a second direction. The actuation module 400 includes a motor 410 and a reduction gearbox 420. The torque output component 430 is disposed inside the reduction gearbox 420. The reduction gearbox 420 includes a housing 422 and a reduction structure 421 disposed inside the housing 422. The reduction structure 421 is located between the rotating shaft 411 of the motor 410 and the torque output component 430 and has at least one stage.

[0069] Combination Figure 6In this embodiment, the actuation module 400 is located below the telescopic module 300, and the torque output component 430 is positioned upwards and is connected to the telescopic module 300 in a transmission manner. This reasonably shortens the transmission distance between the actuation module 400 and the telescopic module 300, which helps to reasonably reduce the minimum height of the overall device. Specifically, the motor 410 is vertically positioned in the lower part of the housing 500, and the reduction gearbox 420 is vertically positioned on top of the motor 410. The motor 410 has a rotating shaft 411, and a sun gear 440 is sleeved on the upper end of the rotating shaft 411. The reduction structure 421 of the reduction gearbox 420 adopts a single-stage, two-stage, or multi-stage planetary gear reduction structure. The planet carrier of the last stage planetary gear reduction structure is located on top of the reduction structure 421 and serves as the torque output component 430. The lower end of the lead screw 310 extends into the reduction gearbox 420 and is supported by bearings. The lower end of the lead screw 310 is connected to the planet carrier of the last stage planetary gear reduction structure in a transmission manner. When the motor 410 is working, the rotating shaft 411 drives the sun gear 440 to rotate synchronously. The sun gear 440 drives the planet carrier of the last stage planetary gear reduction structure to rotate through the planetary gear reduction structure of each stage. The planet carrier drives the lead screw 310 to rotate synchronously, thereby enabling the actuation module 400 to provide actuation torque to the telescopic module 300. Specifically, the lower end of the lead screw 310 and the planet carrier of the last stage planetary gear reduction structure can be connected by spline fit, non-circular shaft hole fit, or fastener locking. In addition, the planetary gear reduction structures of each stage in the reduction gearbox 420 can share a common internal gear ring, or each stage planetary gear reduction structure can have its own internal gear ring. In other specific embodiments of this application, the torque output component 430 can also be an output shaft located on the planet carrier of the last stage planetary gear reduction structure of the reduction gearbox 420, and the lower end of the lead screw 310 is connected to the output shaft by a coupling or other means.

[0070] The gearbox 420's housing 422 includes a housing 4221 and a cover 4222 located at the lower end of the housing 4221. The outer tube 340 of the telescopic module 300 extends downward into the housing 500 and abuts against the housing 422, thereby axially constraining the outer tube 340. To further improve the stability of the outer tube 340, a groove 4223 is provided at the top of the housing 422. The lower end of the outer tube 340 is inserted into the groove 4223, and the groove 4223 radially constrains the lower end of the inner tube 330. Additionally, when the outer tube 340 is a non-circular tube, the groove 4223 can also be used to circumferentially constrain the inner tube 330.

[0071] In this embodiment, the actuation module 400 and the telescopic module 300 are preferably coaxially arranged, which simplifies the transmission structure between the actuation module 400 and the telescopic module 300 and facilitates reasonable control of the overall radial dimension of the device. Furthermore, the central axes of the motor 410, the reduction gearbox 420, and the telescopic module 300 are substantially coincident. Specifically, the central axis of the motor 410 is determined by the central axis of the rotating shaft 411, the central axis of the reduction gearbox 420 can be determined by the central axis of the torque output component 430, and the central axis of the telescopic module 300 is determined by the central axis of the lead screw 310. Additionally, the centers of the base 100, the top seat 200, the axis of the actuation module 400, and the axis of the telescopic module 300 are preferably coincident. In other specific embodiments of this application, the central axes of the motor 410 and the reduction gearbox 420 can also be staggered; furthermore, the central axes of the reduction gearbox 420 and the telescopic module 300 can also be staggered.

[0072] Combination Figure 6 In this embodiment, a connecting structure 101 is provided between the lower end of the housing 500 and the base 100 to connect the two. Specifically, a lower connector 520 is fixed to the lower end of the housing 500, and a lower connecting sleeve 120 that mates with the lower connector 520 is provided on the base 100. The lower connecting sleeve 120 has a lower connecting hole 110 that mates with the lower connector 520. The lower end of the housing 500 and the base 100 are connected through the mating of the lower connector 520 and the lower connecting sleeve 120. Furthermore, the lower connector 520 can be held tightly by the housing 500, and the lower connecting sleeve 120 can be embedded in the base 100. The lower connector 520 and the lower connecting sleeve 120 can be detachably connected through a threaded engagement, facilitating component replacement. To ensure structural stability and component lifespan, the lower connector 520 and lower connector sleeve 120 can be made of stainless steel or other metal materials, while the housing 500 and base 100 can be made of high-strength plastic. The metal lower connector sleeve 120 can be fixed to the base 100 by methods such as overmolding or injection molding. In other specific embodiments of this application, the lower connector sleeve 120 can be omitted, and the lower connector 520 can be fixed to the base 100 by methods such as overmolding or injection molding. The housing 500 hugs the lower connector 520, and the connection between the housing 500 and the base 100 is achieved solely through the lower connector 520.

[0073] Referring to the figure, in this embodiment, the top seat 200 is provided with an upper connecting hole 210 that mates with the top end of the inner tube 330. The top end of the inner tube 330 mates with the upper connecting hole 210 to achieve the connection between the telescopic module 300 and the top seat 200. Specifically, an upper connecting sleeve 220 is fixed on the top seat 200, and the upper connecting hole 210 is located on the upper connecting sleeve 220. Furthermore, the top end of the inner tube 330 and the upper connecting sleeve 220 can be detachably connected by a threaded connection. To ensure the stability of the structure and the service life of the components, the inner tube 330 and the upper connecting sleeve 220 can be made of stainless steel or other metal materials, and the top seat 200 can be made of high-strength plastic. The metal upper connecting sleeve 220 can be fixed to the top seat 200 by methods such as overmolding or injection molding. The bottom of the top seat 200 is provided with a cover 230 that fits around the top end of the inner tube 330. The cover 230 serves a decorative purpose. When the device is in its initial state, the bottom surface of the cover 230 is slightly higher than the top surface of the end cover 370 to prevent the cover 230 and the end cover 370 from squeezing against each other. In other specific embodiments of this application, the top end of the inner tube 330 and the top seat 200 can also be connected by other means, such as flange structure fasteners.

[0074] Combination Figure 7 , Figure 8In this embodiment, a support member 800 is provided inside the housing 500, located at least partially outside the actuation module 400. The support member 800 is used to at least prevent the motor 410 from bearing load, avoid damage to the motor 410, and ensure the structural and performance stability of the motor 410, thereby ensuring the overall service life and performance stability of the device. Furthermore, the support member 800 is located outside the motor 410. The lower end of the telescopic module 300 directly or indirectly abuts against the housing 422, the housing 422 directly or indirectly abuts against the upper end of the support member 800, and the lower end of the support member 800 directly or indirectly abuts against the base 100. When the device supports a heavy object, the load force borne by the top seat 200 can be transferred downwards to the base 100 through the telescopic module 300, the housing 422, and the support member 800, thereby achieving the purpose of preventing the motor 410 from bearing load. Specifically, two support members 800 are symmetrically arranged around the motor 410. Each support member 800 has a roughly arc-shaped cross-section perpendicular to the height direction. The upper end of the support member 800 directly abuts against the lower end of the housing 4221. The lower end of the support member 800 is provided with a support part 810 that is bent toward the axis of the motor 410 and is roughly block-shaped. The support part 810 abuts against the lower connector 520. When the housing 500 and the base 100 are connected together through the cooperation of the lower connector 520 and the lower connecting sleeve 120, the support part 810 at the lower end of the support member 800 indirectly abuts against the base 100 through the lower connector 520 and the lower connecting sleeve 120. Of course, an elastic sealing gasket or a rigid support ring can also be provided between the upper end of the support member 800 and the lower end of the housing 4221, so that the housing 4221 of the housing 422 indirectly abuts against the upper end of the support member 800; in addition, the lower end of the support member 800 can also extend downwards out of the housing 500. When the housing 500 is connected to the base 100, the lower end of the support member 800 abuts against the lower connecting sleeve 120 or the base 100, so that the lower end of the support member 800 directly abuts against the base 100; in addition, the number of support members 800 is not limited to those described above and shown in the figures. The support members 800 can also be distributed evenly in three or four pieces along the circumference of the motor 410, or other reasonable numbers, depending on their size; furthermore, the specific structure of the support member 800 is not limited to those described above and shown in the figures. The support member 800 can also be set into other reasonable styles, such as a cylindrical shape with hollow holes.

[0075] Combination Figure 8In this embodiment, to ensure the stability of the support member 800, the lower connector 520 includes a connecting portion 521 that mates with the lower connecting sleeve 120 and a positioning portion 522 located on the top of the connecting portion 521. The outer diameter of the positioning portion 522 is larger than the outer diameter of the connecting portion 521. The lower end of the support member 800 abuts against the positioning portion 522, thereby allowing the support member 800 to be axially constrained. Furthermore, the positioning portion 522 is provided with an upwardly protruding positioning block 523. The cooperation between the support portion 810 and the positioning block 523 allows the support member 800 to be radially and circumferentially constrained.

[0076] In this embodiment, the bottom surface of the base 100 is provided with a first elastic pad 130. The first elastic pad 130 has a certain thickness and its lower surface is lower than the lower surface of the base 100. The first elastic pad 130 can increase the grip of the base 100, which is beneficial to improving the overall placement stability of the device. The top surface of the top seat 200 is provided with a second elastic pad 240. The second elastic pad 240 has a certain thickness and its upper surface is higher than the upper surface of the top seat 200. The second elastic pad 240 can increase the friction between the top seat 200 and the supported weight 20, which is beneficial to improving the support stability of the device.

[0077] Combination Figure 9 To facilitate user operation, the housing 500 includes an operation board 720 electrically and / or signal-connected to the control board 710. The operation board 720 has several operating components 730 exposed outside the housing 500, allowing the user to control the device. Specifically, the operating components 730 can be single or combined structures such as buttons, touchscreens, or knobs, as long as they meet the user's operational requirements. For example, the operating components 730 have an up button and a down button. When the user presses the up button, the actuation module 400 drives the telescopic module 300 to extend; when the user presses the down button, the actuation module 400 drives the telescopic module 300 to retract. The battery pack 600 supplies power to the motor 410, control board 710, and other electrical components. The motor 410 is controlled by the control board 710, which can operate the motor 410 according to the user's commands, causing the lead screw 310 to rotate in a first or second direction, thereby raising or lowering the load supported by the device.

[0078] Combination Figure 10When the object 20 is large in volume or weight, multiple devices are generally used to lift or lower it in tandem. To ensure the stability of the object 20 during lifting, each device needs to move synchronously, so that the top seats 200 of each device maintain a consistent height. The object 20 can be furniture, workpieces, machinery, or other objects. Based on this, the electric lifting device 10 of this embodiment is equipped with a wireless communication unit 750. Each device can communicate directly or indirectly through the wireless communication unit 750, thus ensuring synchronous movement. Specifically, the wireless communication unit 750 is located on the control board 710. The control board 710 can communicate with the outside world through the wireless communication unit 750, and the wireless communication unit 750 can also feed back received signals to the control board 710.

[0079] Combination Figure 11 , Figure 12 This embodiment also provides a working method for the above-mentioned electric lifting device 10:

[0080] The electric lifting device 10 whose main control function is activated acts as a primary device 10A and searches for other electric lifting devices 10 within a preset range. Other electric lifting devices 10 act as secondary devices 10B and communicate with the primary device 10A.

[0081] The primary device 10A forwards the received work instructions to the secondary device 10B;

[0082] Secondary device 10B feeds back the working signal to primary device 10A;

[0083] When the working signal of a certain electric lifting device malfunctions, the first-level device 10A sends instructions to other electric lifting devices.

[0084] Specifically, the control panel 720 has a main control button 740 exposed on the housing 500. When the main control button 740 of a device is pressed, that device becomes a primary device 10A. The preset range depends on the communication distance of the wireless communication unit 750. The wireless communication unit can use Bluetooth communication, and the maximum communication range of Bluetooth can be set to a reasonable size such as 6m, 8m, 10m, 12m, 14m, 16m, 18m, or 20m. In other specific embodiments of this application, the wireless communication unit 750 can also use other reasonable wireless communication methods such as ZigBee or Wi-Fi.

[0085] Other devices within the preset range that have enabled wireless communication function are designated as secondary devices 10B. Each secondary device 10B establishes bidirectional communication with the primary device 10A. When the user operates the primary device 10A via the operating component 730 to command the device to raise or lower the heavy object 20, the primary device 10A forwards the work command to the secondary devices 10B via wireless communication, thereby enabling all devices to raise or lower synchronously. The secondary devices 10B feed back the work signals to the primary device 10A via wireless communication. These work signals can be single or combined signals that can directly or indirectly characterize the movement speed of the top seat 200, such as the current signal of the motor 410, the voltage signal of the motor 410, the speed signal of the motor 410, the speed signal of the torque output component 430, the speed signal of any rotating component in the reduction gearbox 420, and the movement speed signal of the top seat 200. Each electric lifting device 10 is equipped with a preset signal value. The working signal of the primary device 10A and the working signal of the secondary device 10B are compared with the preset signal value. When the working signal of a certain device differs from the preset signal value or exceeds a certain range, the primary device 10A sends a command to the other devices. For example, when the lifting speed of one or more devices is less than the preset speed value, the primary device 10A sends a command to the other devices to reduce the operating speed. The other devices that receive the command instruct their motors 410 to reduce the speed through the control board 710, thereby reducing the lifting speed.

[0086] It is understood that the maximum load capacity of the electric lifting device 10 in this embodiment can be set to a reasonable size such as 20kg, 30kg, 40kg, 50kg, 60kg, 70kg, 80kg, 90kg, or 100kg, depending on factors such as the model of the motor 410, the load capacity of the gearbox 420, the load capacity of the telescopic module 300, and the working voltage of the battery pack 600.

[0087] It is understood that the connection structure 101 between the housing 500 and the base 100 is not limited to what is described above and shown in the figures. Other reasonable connection methods can also be used, such as a ball bearing hinge.

[0088] It is understood that the electric lifting device 10 in this embodiment can also be powered by connecting to the mains power supply via a power cord.

[0089] It is understandable that the lower connector 520 and the lower connector sleeve 120 can also be detachably connected by means other than threaded connection, such as a square shaft hole connection structure (refer to the connection structure between the square drive head and the sleeve in a torque wrench).

[0090] It is understandable that the top of the inner tube 330 and the upper connecting sleeve 220 can also be detachably connected by means other than threaded connection, such as a square shaft hole connection structure (refer to the connection structure between the square drive head and the sleeve in a torque wrench). Example 2

[0091] The difference between this embodiment and embodiment one is that the support member 800 is located on the outside of the motor 410 and the gearbox 420, the lower end of the telescopic module 300 directly or indirectly abuts against the upper end of the support member 800, and the lower end of the support member 800 directly or indirectly abuts against the base 100.

[0092] Combination Figure 13 In the first embodiment, the top wall of the housing 4221 has a radially outward protruding flange 4224, and the top end of the support member 800 abuts against the flange 4224. The outer tube 340 of the telescopic module 300 abuts against the top wall of the housing 4221, and the top wall of the housing 4221 abuts against the upper end of the support member 800, thereby indirectly abutting the lower end of the telescopic module 300 against the upper end of the support member 800. The lower end of the support member 800 can still abut against the lower connector 520 through the support part 810, thereby indirectly abutting the lower end of the support member 800 against the base.

[0093] Combination Figure 14 In the second embodiment, the top of the gearbox 420 is provided with a support plate 450. The lower end of the outer tube 340 abuts against the support plate 450 and is constrained. The upper end of the support member 800 abuts against the bottom of the support plate 450. That is, the lower end of the telescopic module 300 indirectly abuts against the upper end of the support member 800 through the support plate 450. Of course, the support plate 450 and the support member 800 can also be integrally formed or separately formed and then fixed together.

[0094] In this embodiment, the support member 800 can be configured as an arc-shaped plate and several are arranged at intervals along the circumference of the actuation module 400. The support member 800 can also be configured as a cylindrical shape with hollow holes.

[0095] In other specific embodiments of this application, an elastic pad or a rigid support ring or other components may be provided between the upper end of the support member 800 and the support plate 450.

[0096] In other specific embodiments of this application, the lower end of the support member 800 can extend downwards out of the housing. When the housing is connected to the base, the lower end of the support member 800 directly abuts against the base or directly against the lower connecting sleeve.

[0097] The other structures of Embodiment 2 are the same as those of Embodiment 1, and will not be described in detail here.

[0098] The working method in Example 1 is applicable to the electric lifting device in this example. Example 3

[0099] Combination Figure 15 , Figure 16 , Figure 17 The electric lifting device 10' in this embodiment also includes an extension rod 1000, which is detachably installed between the telescopic module 300 and the top seat 200 and / or detachably installed between the housing 500 and the base 100.

[0100] To facilitate the installation of the extension rod 1000, the telescopic module 300 and the top seat 200, the housing 500 and the base 100, the extension rod 1000 and the telescopic module 300, the extension rod 1000 and the top seat 200, the extension rod 1000 and the housing 500, and the extension rod 1000 and the base 100 are all detachably connected via the same connection structure. This allows the same extension rod 1000 to be installed between the telescopic module 300 and the top seat 200, or between the housing 500 and the base, improving the versatility of the extension rod 1000. Specifically, in this embodiment, one end of the extension rod 1000 has an external thread section 1010, and the other end has an internal thread section 1020. Figure 18 , Figure 19 The external thread section 1010, the external thread at the top of the inner tube 300, and the external thread on the lower connector 520 have the same specifications. The internal thread section 1020, the upper connecting hole 210, and the lower connecting hole 110 have the same specifications. When the extension rod 1000 is installed between the telescopic module 300 and the top seat 200, the external thread section 1010 of the extension rod 1000 is tightened into the upper connecting hole 210, and the external thread at the top of the inner tube 330 is tightened into the internal thread section 1020 of the extension rod 1000. When the extension rod 1000 is installed between the housing 500 and the base 100, the external thread section 1010 of the extension rod 1000 is tightened into the lower connecting hole 110, and the lower connector 520 is tightened into the internal thread section 1020 of the extension rod 1000.

[0101] In other specific embodiments of this application, the telescopic module 300 and the top seat 200, the housing 500 and the base 100, the extension rod 1000 and the telescopic module 300, the extension rod 1000 and the top seat 200, the extension rod 1000 and the housing 500, and the extension rod 1000 and the base 100 can also be detachably connected by means other than threaded connection, such as a square shaft hole connection structure (refer to the connection structure of the square drive head and the socket in a torque wrench), etc.

[0102] The other structures of the electric lifting device 10' in Embodiment 2 are the same as those in Embodiment 1, and will not be described again here.

[0103] The working method in Example 1 is applicable to the electric lifting device in this example. Example 4

[0104] Combination Figure 18 , Figure 19 In this embodiment, the electric lifting device 10 is equipped with a control terminal 30, and the working method of the electric lifting device 10 is as follows:

[0105] The control terminal 30 searches for electric lifting devices 10 within a preset range and communicates with them.

[0106] The control terminal 30 sends working instructions to the electric lifting device 10 with which it communicates;

[0107] The electric lifting device 10, which communicates with the control terminal 30, feeds back the working signal to the control terminal 30. When an electric lifting device 10 malfunctions, the control terminal 30 sends instructions to other electric lifting devices 10.

[0108] In this embodiment, the control terminal 30 can be an independent operator with remote control function, or an electronic device such as a mobile phone or tablet computer with corresponding operating software installed. The user can send up or down commands to the communicating devices through the control terminal 30. Upon receiving the command, the device instructs the motor 410 to operate. Each device feeds back a working signal representing its speed to the control terminal 30. The control terminal 30 compares the working signals of each device with preset signal values. When the speed of a device is less than that of other devices, the control terminal 30 sends a speed reduction command or a pause command to the other devices. Upon receiving the command, the other devices execute the corresponding operation.

[0109] The electric lifting device 10 in this embodiment can be the device described in Embodiment 1 or Embodiment 2.

[0110] The other contents of Example 4 are the same as those of Example 1, and will not be repeated here. Example 5

[0111] Combination Figure 20 , Figure 21 In this embodiment, the electric lifting device 10 is equipped with a control terminal 30, and the method applied to the electric lifting device 10 is as follows:

[0112] The electric lifting device 10, whose main control function is activated, acts as a primary device 10A and communicates with the control terminal 30.

[0113] The primary device 10A searches for other electric lifting devices 10 within a preset range. The other electric lifting devices 10 act as secondary devices 10B and communicate with the primary device 10A.

[0114] The control terminal 30 sends a working instruction to the primary device 10A, and the primary device 10A forwards the received working instruction to the secondary device 10B.

[0115] The secondary device 10B feeds back the working signal to the primary device 10A. The primary device 10A feeds back its own working signal and the working signal received from the secondary device 10B to the control terminal 30. When a certain electric lifting device 10 malfunctions, the control terminal 30 sends a command to the secondary device 10B through the primary device 10A.

[0116] In this embodiment, the control terminal 30 can be an independent operator with remote control functionality, or an electronic device such as a mobile phone or computer with corresponding operating software installed. The user can send up or down commands to the primary device 10A, with which it communicates, via the control terminal 30. The primary device 10A forwards the commands to the secondary devices 10B, and each device, upon receiving the command, instructs the motor 410 to operate. The secondary device 10B feeds back a working signal representing the movement speed to the primary device 10A, and the primary device 10A feeds back its own working signal and the working signals of the secondary device 10B to the control terminal 30. The control terminal 30 compares the working signals of each device with preset signal values. When the movement speed of a device is less than that of other devices, the control terminal 30 sends a speed reduction command or a pause command to itself or other secondary devices 10B via the primary device 10A. Upon receiving the command, the device executes the corresponding operation. In this embodiment, the primary device 10A acts as a relay between the control terminal 30 and the secondary devices 10B.

[0117] In other embodiments of this invention, the secondary device 10B feeds back the working signal to the primary device 10A. When the working signal of a certain device is abnormal, the primary device 10A directly sends a command to itself or other devices to reduce speed or stop working. After receiving the command, the other devices perform the corresponding operations.

[0118] The electric lifting device 10 in this embodiment can be the device described in Embodiment 1 or Embodiment 2.

[0119] The other contents of Example 5 are the same as those of Example 1, and will not be repeated here.

[0120] In addition to the preferred embodiments described above, there are other embodiments of this utility model. Those skilled in the art can make various changes and modifications based on this utility model. As long as they do not depart from the spirit of this utility model, they should all fall within the scope defined in the claims of this utility model.

Claims

1. An electric jacking device, comprising: Base; The top seat is located above the base; Telescopic module, which is located between the base and the top seat and is used to drive the top seat to rise or fall relative to the base; An actuation module, which provides actuating torque to the telescopic module to extend or shorten it; A housing is disposed between a base and a top seat, and at least a portion of the telescopic module and at least a portion of the actuation module are housed within the housing. Its features are, The actuation module is located between the telescopic module and the base. The actuation module includes a motor and a gearbox located on top of the motor. A support member is provided inside the housing, located at least partially on the outer side of the actuation module. The support member is used to at least prevent the motor from bearing load force.

2. The electric jacking device according to claim 1, characterized in that The support is located outside the motor. The lower end of the telescopic module directly or indirectly abuts against the housing. The housing directly or indirectly abuts against the upper end of the support. The lower end of the support directly or indirectly abuts against the base.

3. The electric jacking device according to claim 1, wherein The support is located outside the motor and gearbox. The lower end of the telescopic module directly or indirectly abuts against the upper end of the support, and the lower end of the support directly or indirectly abuts against the base.

4. The electric jacking device according to claim 2 or 3, characterized in that The lower end of the housing is provided with a connecting structure between the two and the base, and the lower end of the support abuts against the connecting structure.

5. The electric lifting device according to claim 4, characterized in that The connection structure includes a lower connector at the lower end of the housing and a lower connector sleeve on the base, with the lower end of the support abutting against the lower connector.

6. The electric lifting device according to claim 5, characterized in that The lower connector and the lower connecting sleeve are detachably connected by a threaded engagement; and / or, the lower connector includes a connecting part that engages with the lower connecting sleeve and a positioning part located on the top of the connecting part, the outer diameter of the positioning part being larger than the outer diameter of the connecting part, and the lower end of the support abutting against the positioning part and being limited.

7. The electric lifting device according to claim 2 or 3, characterized in that The telescopic module includes a lead screw, a nut, an inner tube, and an outer tube. The lower end of the lead screw is connected to the torque output component of the gearbox and can rotate around its own central axis. The nut is sleeved on the lead screw and can move axially relative to the lead screw. The inner tube is sleeved outside the lead screw with its lower end connected to the nut. The top seat is connected to the upper end of the inner tube. The outer tube is sleeved outside the inner tube with its position set.

8. The electric jacking device according to claim 2 or 3, characterized in that The motor, gearbox, and telescopic module are arranged with their axes aligned.

9. The electric lift device of claim 1, wherein, The support member is plate-shaped and has several members spaced apart along the circumference of the actuation module; or, the support member is cylindrical.

10. The electric jacking device of claim 1, wherein, The electric lifting device also includes a battery pack, which is detachably attached to the housing; and / or, the electric lifting device also includes an extension rod, which is detachably attached between the telescopic module and the top seat and / or detachably attached between the housing and the base.

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