Telescopic lifting device and plant hoisting system

Abstract

The application provides a telescopic hoisting device and a plant hoisting system, and the telescopic hoisting device comprises a support, a longitudinal track, a transverse track, a telescopic arm and a crane, the longitudinal track is fixedly connected to the upper portion of the support, the transverse track is movably connected to the bottom of the longitudinal track and moves along the length direction of the longitudinal track, the telescopic arm is movably connected to the bottom of the transverse track and can move along the length direction of the transverse track to the outside of the support, and the crane is movably connected to the telescopic arm, moves along the length direction of the telescopic arm and is connected to a lifting appliance at the bottom. The application can be applied to the hoisting of three-span areas or multiple-span areas, can realize the aerial relay hoisting of goods in the whole-span area, increases the working space of the hoisting device, increases the running range of the lifting appliance, reduces the use of ground carrying equipment, reduces the labor cost and equipment cost and improves the working efficiency.

Description

Technical Field

[0001] This invention relates to the field of lifting equipment technology, and in particular to a retractable lifting device and factory hoisting system. Background Technology

[0002] Currently, bridge cranes in factory buildings can only perform lifting operations inside the factory. Goods are manually moved into the factory from outside using forklifts or other handling equipment, and then transported to designated locations inside the factory by the bridge crane. Existing bridge crane technology has the following disadvantages: (1) The working range of the existing ordinary bridge crane is relatively small. It can only lift the goods under the crossbeam of the crane trolley. The goods in other areas need to be transported to the bottom of the crane by manual forklift or handling equipment before they can be lifted again.

[0003] (2) In a factory building, there are multiple spans, and each span requires the installation of a crane to complete the handling within the factory building; each crane can only carry out handling work within its own span and cannot be used in a relay.

[0004] (3) A crane is installed in the single-row factory building. If the truck cannot drive into the factory building to unload the goods, a forklift needs to be used to unload the goods outside the factory building and then send them into the factory building so that the crane can send the goods to other locations inside the factory building. Summary of the Invention

[0005] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide a retractable lifting device and factory hoisting system, which increases the working space of the lifting device, enables multi-span relay hoisting, and improves work efficiency.

[0006] One embodiment of the present invention provides a telescopic lifting device, comprising: a support frame, a longitudinal rail, a transverse rail, a telescopic boom, and a crane. The longitudinal rail is fixedly connected to the upper part of the support frame; the transverse rail is movably connected to the bottom of the longitudinal rail, the transverse rail and the longitudinal rail are perpendicular to each other, and the transverse rail moves along the length direction of the longitudinal rail; the telescopic boom is movably connected to the bottom of the transverse rail, and the telescopic boom can move along the length direction of the transverse rail to extend beyond the outside of the support frame; the crane is movably connected to the telescopic boom, the crane moves along the length direction of the telescopic boom, and a lifting device is connected to the bottom of the crane.

[0007] In some embodiments, there is a sliding fit between the transverse rail and the longitudinal rail, a sliding fit between the telescopic boom and the transverse rail, and a sliding fit between the crane and the telescopic boom.

[0008] In some embodiments, the telescopic lifting device further includes a traveling mechanism slidably connected above a longitudinal track and a transverse track connected to the bottom of the traveling mechanism. The traveling mechanism includes a control cabinet electrically connected to the telescopic boom and the crane, respectively.

[0009] In some embodiments, the walking mechanism includes a suspended wheel drive.

[0010] In some embodiments, a limiting mechanism is connected to the bottom of the transverse track to limit the extension range of the telescopic arm.

[0011] In some embodiments, the telescopic lifting device further includes a reset detection device for detecting whether the telescopic boom has returned to its initial centered position on the transverse track.

[0012] In some embodiments, the reset detection device is located at the bottom of the walking mechanism.

[0013] Another embodiment of the present invention provides a factory hoisting system, including the above-mentioned telescopic lifting device and a factory building. The telescopic lifting device is located inside the factory building, and the telescopic arm can move along the length direction of the transverse track to extend to the outside of the factory building to lift goods outside the factory building.

[0014] In some embodiments, three spans are arranged side by side in the factory building. A longitudinal track is connected to the support of the middle span, and a transverse track is movably connected to the bottom of the longitudinal track of the middle span. The telescopic arm can move along the length of the transverse track to extend to both sides of the factory building.

[0015] In some embodiments, multiple spans are arranged side by side in the factory building, with longitudinal rails connected to the supports of each span. Each span's supports are connected to transverse rails, telescopic booms, and cranes, and the lifting devices of the cranes in adjacent spans can take turns lifting. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings. in: Figure 1 This is a schematic diagram of the retractable lifting device according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the retractable lifting device of the present invention applied to a three-span factory hoisting system; Figure 3 This is a structural schematic diagram of a retractable lifting device applied to a factory hoisting system for multi-span relay hoisting, according to an embodiment of the present invention. Figure 4 for Figure 3 Top view; Figure label: 1. Factory building; 2. Longitudinal track; 3. Traveling mechanism; 4. Support frame; 5. Transverse track; 6. Telescopic boom; 7. Crane; 8. Lifting gear. Detailed Implementation

[0017] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0018] The retractable lifting device and factory hoisting system of the present invention are described below with reference to the accompanying drawings.

[0019] like Figure 1 As shown, one embodiment of the present invention provides a telescopic lifting device, comprising: a support 4, a longitudinal rail 2, a transverse rail 5, a telescopic boom 6, and a crane 7. The longitudinal rail 2 is fixedly connected to the upper part of the support 4; the transverse rail 5 is movably connected to the bottom of the longitudinal rail 2, the transverse rail 5 is perpendicular to the longitudinal rail 2, and the transverse rail 5 moves along the length direction of the longitudinal rail 2; the telescopic boom 6 is movably connected to the bottom of the transverse rail 5, and the telescopic boom 6 can move along the length direction of the transverse rail 5 to extend beyond the outside of the support 4; the crane 7 is movably connected to the telescopic boom 6, the crane 7 moves along the length direction of the telescopic boom 6, and the bottom of the crane 7 is connected to a lifting device 8.

[0020] By setting up a telescopic boom 6, the working space of the lifting device is increased, the operating range of the lifting device 8 is increased, the use of ground handling equipment is reduced, labor and equipment costs are lowered, and work efficiency is improved.

[0021] Furthermore, the operation of the transverse track 5, the telescopic boom 6, and the crane 7 can be controlled remotely.

[0022] Furthermore, if intelligent handling is adopted, goods can be directly hoisted to designated locations for storage without the need for manual passageways, and the picking function for each item can be realized.

[0023] Furthermore, the lifting device 8 can take various forms. For example, it can be a wire rope winch. Due to the limited operating space at the top of the crane 7, it needs to move from one end to the other along the telescopic boom 6. The top of the crane 7 will pass under the longitudinal track 2. Therefore, the lifting device 8 or sling of the crane 7 needs to be a wire rope winch to reduce the height of the top of the crane 7 and avoid collisions between the crane 7 and the longitudinal track 2. Alternatively, a combination of a robotic arm and a gripper can be used. Positioning devices such as image recognition or LiDAR can be installed on the gripper to improve the accuracy of automatic positioning and gripping. The appropriate method can be selected based on actual needs.

[0024] In some embodiments, such as Figure 1 As shown, there is a sliding fit between the transverse track 5 and the longitudinal track 2, a sliding fit between the telescopic boom 6 and the transverse track 5, and a sliding fit between the crane 7 and the telescopic boom 6.

[0025] In some alternative embodiments, the sliding mechanism of the telescopic arm 6 can be replaced with a rack and pinion drive, which enables precise telescoping.

[0026] In some embodiments, such as Figure 1 As shown, the telescopic lifting device also includes a traveling mechanism 3, which is slidably connected above the longitudinal track 2 and the transverse track 5 is connected to the bottom of the traveling mechanism 3. The traveling mechanism 3 includes a control cabinet, which is electrically connected to the telescopic boom 6 and the crane 7 respectively, and is used to control the operation of the telescopic boom 6 and the crane 7.

[0027] In some embodiments, the walking mechanism 3 includes a suspended wheel drive device to enable telescopic movement of the telescopic arm 6 on both sides. The telescopic arm 6 is lower than the longitudinal track 2 to provide sufficient space for telescopic movement.

[0028] Furthermore, the operation of the transverse track 5 can be achieved by a drive device installed on the top of the factory building 1, which can be operated remotely.

[0029] In some embodiments, a limiting mechanism is connected to the bottom of the transverse track 5 to limit the extension range of the telescopic arm 6, preventing the telescopic arm 6 from extending too far and falling off the transverse track 5.

[0030] In some embodiments, the telescopic lifting device further includes a reset detection device for detecting whether the telescopic boom 6 has returned to its initial centered position on the transverse track 5. This prevents collisions with the support frame 4, walls, or adjacent longitudinal track 2 of the factory building 1.

[0031] Furthermore, the reset detection device is electrically connected to the control cabinet. The reset detection device can take many forms, such as photoelectric sensors, magnetic sensors, micro switches, limit switches, laser rangefinders, etc.

[0032] In some embodiments, the reset detection device is located at the bottom of the walking mechanism 3.

[0033] Furthermore, measuring points can be set on the telescopic arm 6 to cooperate with the reset detection device for detection.

[0034] like Figures 1-4 As shown, another embodiment of the present invention proposes a factory hoisting system, including the above-mentioned telescopic lifting device, and also including a factory 1. The telescopic lifting device is located inside the factory 1, and the telescopic arm 6 can move along the length direction of the transverse track 5 to extend to the outside of the factory 1 to hoist goods outside the factory 1.

[0035] There is no need for the truck to enter factory building 1. The truck can be parked directly at the entrance of factory building 1, and the telescopic boom 6 can be extended outside the factory building 1 to lift goods directly from the truck. After the lifting is completed, the telescopic boom 6 is retracted to the middle position, and the crane can then operate in the manner of a traditional bridge crane.

[0036] The embodiments of the present invention increase the working space of the lifting device and the operating range of the lifting device 8, which can reduce the use of ground handling equipment, reduce labor and equipment costs, and improve work efficiency.

[0037] In some embodiments, such as Figure 2 As shown, three spans are arranged side by side in the factory building 1. The longitudinal track 2 is connected to the support 4 of the middle span, and the transverse track 5 is movably connected to the bottom of the longitudinal track 2 of the middle span. The telescopic arm 6 can move along the length of the transverse track 5 to extend to both sides of the factory building 1.

[0038] By simply installing a lifting device in the middle span, goods can be hoisted and moved between the three spans without the need for ground handling equipment, thus reducing costs and improving efficiency.

[0039] Furthermore, each set of supports 4 includes two rows of frames arranged side by side, with the longitudinal track 2 fixedly connected to the upper part of each row of frames in the horizontal direction.

[0040] In some embodiments, such as Figures 3-4 As shown, multiple spans are arranged side by side in the factory building 1. The longitudinal rail 2 is connected to the support 4 of each span. Each span's support 4 is connected to the transverse rail 5, the telescopic boom 6, and the crane 7. The lifting devices 8 of the cranes 7 in two adjacent spans can take turns lifting.

[0041] When the lifting device only operates in the current span, that is, when its transverse track 5 only moves along the length of the longitudinal track 2, its telescopic boom 6 needs to be centered and returned to its original position to ensure that there is no interference when operating in the current span.

[0042] This invention enables aerial relay hoisting of goods across an entire area without the need for ground handling equipment, significantly reducing equipment investment and labor costs, improving hoisting and handling efficiency, and without occupying ground logistics channels or ground space. Similarly, this invention can also hoist longer goods.

[0043] It should be noted that during the aerial cargo transfer process, a spreader 8 consisting of a robotic arm and grippers, or a spreader combining a robotic arm and slings, can be used. The position of the lifting point of the spreader 8 can be adjusted so that the spreader 8 for the next span moves to the cargo in the previous span for gripping or hooking, thus improving positioning accuracy. Alternatively, image recognition or lidar positioning devices can be installed on the grippers to achieve automatic transfer.

[0044] The following specific examples will further illustrate this case.

[0045] Example 1 like Figure 1 As shown, a telescopic lifting device includes: a support 4, a longitudinal rail 2, a transverse rail 5, a telescopic boom 6, and a crane 7. The longitudinal rail 2 is fixedly connected to the upper part of the support 4; the transverse rail 5 is movably connected to the bottom of the longitudinal rail 2, and the transverse rail 5 is perpendicular to the longitudinal rail 2 and can move along the length direction of the longitudinal rail 2; the telescopic boom 6 is movably connected to the bottom of the transverse rail 5 and can move along the length direction of the transverse rail 5 to extend beyond the outside of the support 4; the crane 7 is movably connected to the telescopic boom 6 and can move along the length direction of the telescopic boom 6, and the bottom of the crane 7 is connected to a lifting device 8.

[0046] The operation of the transverse track 5, telescopic boom 6, and crane 7 is controlled remotely. It employs intelligent handling, allowing goods to be directly hoisted to designated storage locations without the need for manual passageways, and also enabling the picking of individual goods.

[0047] The lifting device 8 adopts a wire rope winch form. Due to the limited operating space at the top of the crane 7, it needs to move from one end to the other along the telescopic boom 6. The top of the crane 7 will pass through the bottom of the longitudinal rail 2. Therefore, the lifting device 8 or sling of the crane 7 needs to adopt a wire rope winch form to reduce the height of the top of the crane 7 and avoid collision between the crane 7 and the longitudinal rail 2.

[0048] The transverse rail 5 and the longitudinal rail 2 are in sliding fit, the telescopic boom 6 and the transverse rail 5 are in sliding fit, and the crane 7 and the telescopic boom 6 are in sliding fit.

[0049] The telescopic lifting device also includes a traveling mechanism 3, which is slidably connected above the longitudinal rail 2. A transverse rail 5 is connected to the bottom of the traveling mechanism 3. The traveling mechanism 3 includes a control cabinet, which is electrically connected to the telescopic boom 6 and the crane 7 respectively, for controlling the operation of the telescopic boom 6 and the crane 7. The traveling mechanism 3 includes a suspended wheel drive device to realize the telescopic movement of the telescopic boom 6 on both sides. The telescopic boom 6 is lower than the longitudinal rail 2 to provide sufficient space for telescopic movement.

[0050] The operation of the transverse track 5 is achieved by a drive device installed at the top of the factory building 1, which can be operated remotely. A limit mechanism is connected to the bottom of the transverse track 5 to limit the extension range of the telescopic arm 6, preventing it from extending too far and falling off the transverse track 5.

[0051] The telescopic lifting device also includes a reset detection device to detect whether the telescopic boom 6 has returned to its initial centered position on the transverse track 5. This prevents collisions with the support frame 4, walls, or adjacent longitudinal tracks 2 of the factory building 1. The reset detection device is electrically connected to the control cabinet. The reset detection device can take various forms, such as photoelectric sensors, magnetic sensors, microswitches, limit switches, laser rangefinders, etc. The reset detection device is located at the bottom of the traveling mechanism 3. Measurement points can be correspondingly set on the telescopic boom 6 to cooperate with the reset detection device for detection.

[0052] Example 2 like Figure 1 As shown, a telescopic lifting device includes: a support 4, a longitudinal rail 2, a transverse rail 5, a telescopic boom 6, and a crane 7. The longitudinal rail 2 is fixedly connected to the upper part of the support 4; the transverse rail 5 is movably connected to the bottom of the longitudinal rail 2, and the transverse rail 5 is perpendicular to the longitudinal rail 2 and can move along the length direction of the longitudinal rail 2; the telescopic boom 6 is movably connected to the bottom of the transverse rail 5 and can move along the length direction of the transverse rail 5 to extend beyond the outside of the support 4; the crane 7 is movably connected to the telescopic boom 6 and can move along the length direction of the telescopic boom 6, and the bottom of the crane 7 is connected to a lifting device 8.

[0053] The operation of the transverse track 5, telescopic boom 6, and crane 7 is controlled remotely. It employs intelligent handling, allowing goods to be directly hoisted to designated storage locations without the need for manual passageways, and also enabling the picking of individual goods.

[0054] The lifting device 8 uses a combination of a robotic arm and a clamp. The clamp is equipped with positioning devices such as image recognition or lidar, which can improve the accuracy of automatic positioning and grasping.

[0055] The transverse track 5 and the longitudinal track 2 are in sliding engagement; the telescopic boom 6 and the transverse track 5 are in sliding engagement; and the crane 7 and the telescopic boom 6 are in sliding engagement. The transverse track 5 is connected to a rack and pinion drive mechanism, which connects to and drives the telescopic boom 6 to slide at the bottom of the transverse track 5, enabling precise extension and retraction.

[0056] The telescopic lifting device also includes a traveling mechanism 3, which is slidably connected above the longitudinal rail 2. A transverse rail 5 is connected to the bottom of the traveling mechanism 3. The traveling mechanism 3 includes a control cabinet, which is electrically connected to the telescopic boom 6 and the crane 7 respectively, for controlling the operation of the telescopic boom 6 and the crane 7. The traveling mechanism 3 includes a suspended wheel drive device to realize the telescopic movement of the telescopic boom 6 on both sides. The telescopic boom 6 is lower than the longitudinal rail 2 to provide sufficient space for telescopic movement.

[0057] The operation of the transverse track 5 is achieved by a drive device installed at the top of the factory building 1, which can be operated remotely. A limit mechanism is connected to the bottom of the transverse track 5 to limit the extension range of the telescopic arm 6, preventing it from extending too far and falling off the transverse track 5.

[0058] The telescopic lifting device also includes a reset detection device to detect whether the telescopic boom 6 has returned to its initial centered position on the transverse track 5. This prevents collisions with the support frame 4, walls, or adjacent longitudinal tracks 2 of the factory building 1. The reset detection device is electrically connected to the control cabinet. The reset detection device can take various forms, such as photoelectric sensors, magnetic sensors, microswitches, limit switches, laser rangefinders, etc. The reset detection device is located at the bottom of the traveling mechanism 3. Measurement points can be correspondingly set on the telescopic boom 6 to cooperate with the reset detection device for detection.

[0059] Example 3 like Figure 1 , Figure 2 As shown, a factory hoisting system includes a telescopic lifting device and a factory 1. The telescopic lifting device is located inside the factory 1, and the telescopic arm 6 can move along the length of the transverse track 5 to extend to the outside of the factory 1 to lift goods outside the factory 1.

[0060] There is no need for the truck to enter factory building 1. The truck can be parked directly at the entrance of factory building 1, and the telescopic boom 6 can be extended outside the factory building 1 to lift goods directly from the truck. After the lifting is completed, the telescopic boom 6 is retracted to the middle position, and the crane can then operate in the manner of a traditional bridge crane.

[0061] The factory building 1 has three spans arranged side by side. The longitudinal track 2 is connected to the support 4 of the middle span. The transverse track 5 is movably connected to the bottom of the longitudinal track 2 of the middle span. The telescopic arm 6 can move along the length of the transverse track 5 to extend to both sides of the factory building 1.

[0062] By simply installing a lifting device in the middle span, goods can be hoisted and moved between the three spans without the need for ground handling equipment, thus reducing costs and improving efficiency.

[0063] Each set of brackets 4 includes two rows of frame bodies arranged side by side, with the longitudinal rail 2 fixedly connected to the upper part of each row of frame bodies in the horizontal direction.

[0064] Example 4 like Figure 1 , Figure 3 , Figure 4 As shown, a factory hoisting system includes a telescopic lifting device and a factory 1. The telescopic lifting device is located inside the factory 1, and the telescopic arm 6 can move along the length of the transverse track 5 to extend to the outside of the factory 1 to lift goods outside the factory 1.

[0065] There is no need for the truck to enter factory building 1. The truck can be parked directly at the entrance of factory building 1, and the telescopic boom 6 can be extended outside the factory building 1 to lift goods directly from the truck. After the lifting is completed, the telescopic boom 6 is retracted to the middle position, and the crane can then operate in the manner of a traditional bridge crane.

[0066] The factory building 1 has four spans arranged side by side. The longitudinal rail 2 is connected to the support 4 of each span. Each span's support 4 is connected to the transverse rail 5, the telescopic boom 6, and the crane 7. The lifting devices 8 of the cranes 7 in two adjacent spans can take turns lifting.

[0067] When the lifting device only operates in the current span, that is, when its transverse track 5 only moves along the length of the longitudinal track 2, its telescopic boom 6 needs to be centered and returned to its original position to ensure that there is no interference when operating in the current span.

[0068] During aerial cargo transfer, a spreader 8 consisting of a robotic arm and grippers, or a spreader combining a robotic arm and slings, can be used. The position of the lifting point of the spreader 8 can be adjusted so that the spreader 8 for the next span moves to the cargo in the previous span for gripping or hooking, improving positioning accuracy. Alternatively, image recognition or lidar positioning devices can be installed on the grippers to achieve automated transfer.

[0069] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0071] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0072] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0073] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0074] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A retractable lifting device, characterized in that, include: support; A longitudinal track, which is fixedly connected to the upper part of the bracket; A transverse track is movably connected to the bottom of the longitudinal track, the transverse track is perpendicular to the longitudinal track, and the transverse track moves along the length of the longitudinal track; A telescopic arm is movably connected to the bottom of the transverse track, and the telescopic arm can move along the length of the transverse track to extend beyond the outside of the bracket; A crane, which is movably connected to a telescopic boom, moves along the length of the telescopic boom, and has a lifting device connected to its bottom.

2. The retractable lifting device according to claim 1, characterized in that, The transverse track and the longitudinal track are in sliding engagement; the telescopic boom and the transverse track are in sliding engagement; and the crane and the telescopic boom are in sliding engagement.

3. The retractable lifting device according to claim 1, characterized in that, It also includes a traveling mechanism, which is slidably connected above the longitudinal track and the transverse track is connected to the bottom of the traveling mechanism. The traveling mechanism includes a control cabinet, which is electrically connected to the telescopic boom and the crane respectively.

4. The retractable lifting device according to claim 3, characterized in that, The walking mechanism includes a suspended wheel drive device.

5. The retractable lifting device according to claim 1, characterized in that, The bottom of the transverse track is connected to a limiting mechanism to limit the extension range of the telescopic arm.

6. The retractable lifting device according to claim 3, characterized in that, It also includes a reset detection device for detecting whether the telescopic arm has returned to its initial centered position on the transverse track.

7. The retractable lifting device according to claim 6, characterized in that, The reset detection device is located at the bottom of the walking mechanism.

8. A factory hoisting system, characterized in that, The retractable lifting device, as described in any one of claims 1-7, further includes a factory building, wherein the retractable lifting device is located inside the factory building, and the telescopic arm is movable along the length of the transverse track to extend beyond the outside of the factory building to lift goods outside the factory building.

9. The factory hoisting system according to claim 8, characterized in that, The factory building has three spans arranged side by side. The longitudinal track is connected to the support of the middle span, and the transverse track is movably connected to the bottom of the longitudinal track of the middle span. The telescopic arm can move along the length of the transverse track to extend to both sides of the factory building.

10. The factory hoisting system according to claim 8, characterized in that, The factory building has multiple spans arranged side by side. Longitudinal tracks are connected to the supports of each span. Each span's support is connected to transverse tracks, the telescopic boom, and a crane. The lifting devices of the cranes in two adjacent spans can take turns lifting.

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