Rail-mounted lifting device

Abstract

The present application relates to a kind of track hoisting equipment, the track hoisting equipment includes track crane and jacking device (2), track crane includes crane body and carrying platform (1), crane body is connected with carrying platform (1);Jacking device (2) is installed on carrying platform (1), and the height of jacking device (2) is adjustable, to enable track crane to rise or fall relative to ground.The present application installs jacking device (2) on the carrying platform (1) of track crane, so that jacking device (2) can move synchronously with track crane, avoids the cumbersome handling, positioning and installation etc. Operation before and after the track crane is transferred, greatly simplifies the operation procedure of track change and transfer.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, and in particular to a rail-mounted lifting device. Background Technology

[0002] Rail-mounted cranes are large lifting equipment, typically equipped with jacking devices to lift, hold, and lower the equipment. The design and performance of these jacking devices directly affect the operating efficiency and stability of the rail-mounted crane. With the widespread application of rail-mounted cranes in large-scale construction projects, the demand for multi-station lifting and short-distance relocation is increasing.

[0003] To enable rail-mounted cranes to switch between different rails, all components above the rails need to be raised to detach the crane from the rails, allowing for more efficient track-changing operations. However, in related technologies, the lifting device is typically mounted on a roadbed box. Before changing the rails or relocating the rail-mounted crane, the lifting device needs to be moved to a designated location on the roadbed box and installed there. After the track-changing and relocation are completed, the lifting device mounted on the roadbed box needs to be disassembled, moved, and stored, leading to complexity and efficiency issues in the entire track-changing and relocation process.

[0004] It should be noted that the information disclosed in the background section of this invention is intended only to enhance the understanding of the overall background of this invention, and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] This invention provides a rail-mounted lifting device that simplifies the operation process of changing rails and relocating rail-mounted cranes, thereby improving operational efficiency.

[0006] According to one aspect of the present invention, a rail-mounted lifting device is provided, comprising:

[0007] A rail-mounted crane includes a crane body and a load-bearing platform, with the crane body connected to the load-bearing platform; and

[0008] A lifting device is installed on the support platform, and the height of the lifting device is adjustable so that the rail-mounted crane can be raised or lowered relative to the ground.

[0009] In some embodiments, the lifting device includes a lifting unit and a support unit. The height of the lifting unit is adjustable. The support unit is connected to the lifting unit, and the area of ​​the support surface of the support unit for contacting the ground is greater than the area of ​​the end face of the lifting unit connected to the support unit.

[0010] In some embodiments, the lifting unit includes a truss structure.

[0011] In some embodiments, the lifting unit includes a telescopic assembly, which includes a guide rod and a chord sleeved around the guide rod. The chord is movable relative to the guide rod in the axial direction of the guide rod to adjust the height of the lifting unit.

[0012] In some embodiments, the lifting unit includes multiple sets of web members and multiple telescopic components. The guide rods of the telescopic components are mounted on the support unit, and each set of web members is connected between the chords of two adjacent telescopic components.

[0013] In some embodiments, the lifting unit further includes a base plate and a drive member. The base plate is connected to the support unit, a guide rod is mounted on the base plate, and the drive member is connected to the base plate and the chord respectively. The drive member is configured to extend or retract to drive the chord relative to the guide rod.

[0014] In some embodiments, the chord has two or more first connecting parts, which are evenly arranged along the outer periphery of the chord. The base plate has second connecting parts that correspond one-to-one with the two or more first connecting parts. The telescopic assembly includes two or more driving members, and the two ends of the driving members are respectively connected to the corresponding first connecting parts and second connecting parts.

[0015] In some embodiments, the rail-mounted lifting device further includes a controller that is signal-connected to two or more drive components to control the synchronous extension or retraction of the two or more drive components.

[0016] In some embodiments, the lifting device further includes a locking mechanism configured to lock the relative positions of the guide rod and the chord rod when the height of the lifting unit reaches a preset value.

[0017] In some embodiments, the lifting device further includes a connecting unit connected to the end of the lifting unit away from the support unit, and the connecting unit is hinged to the support platform.

[0018] In some embodiments, the lifting device is detachably connected to the support platform.

[0019] In some embodiments, the rail-mounted crane includes a plurality of lifting devices, and the bearing platform includes a first bearing portion and a second bearing portion arranged along its length direction. The first bearing portion is used to support the lifting structure of the rail-mounted crane, and the second bearing portion is used to support the counterweight structure of the rail-mounted crane.

[0020] The number of lifting devices arranged around the first bearing part is equal to the number of lifting devices arranged around the second bearing part.

[0021] In some embodiments, the support platform further includes a first connecting beam and a second connecting beam extending along its length direction, the first connecting beam and the second connecting beam being arranged in parallel and respectively connected to the first support portion and the second support portion;

[0022] Four lifting devices are provided between the first bearing part and the second bearing part, two of which are installed on the first connecting beam and arranged along its length, and the other two are installed on the second connecting beam and arranged along its length.

[0023] Two lifting devices are provided on the side of the first bearing part away from the second bearing part, and the two lifting devices are respectively installed on the first connecting beam and the second connecting beam;

[0024] Two lifting devices are provided on the side of the second bearing part away from the first bearing part, and the two lifting devices are respectively installed on the first connecting beam and the second connecting beam.

[0025] Based on the above technical solution, the present invention installs the lifting device on the bearing platform of the rail crane, so that the lifting device can move synchronously with the rail crane. Therefore, before changing the rail and moving the rail crane, there is no need to carry out cumbersome operations such as handling, positioning and installation of the lifting device, which greatly simplifies the operation process of changing the rail and moving the crane, improves the work efficiency and reduces the labor intensity of workers. Attached Figure Description

[0026] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0027] Figure 1 A schematic diagram of the structure of the lifting device installed on the bearing platform of the rail-mounted crane in one embodiment of the rail-mounted lifting equipment of the present invention is shown.

[0028] Figure 2a and Figure 2b The following are schematic diagrams of the lifting device in the lifting state and the retracted state in one embodiment of the rail-mounted lifting equipment of the present invention;

[0029] Figure 3 A schematic diagram of the guide rod and base plate is shown in one embodiment of the rail-mounted lifting device of the present invention;

[0030] Figure 4 A schematic diagram of the truss structure of the lifting device in one embodiment of the rail-mounted lifting equipment of the present invention is shown;

[0031] Figure 5 A schematic diagram of the operating environment of a rail-mounted crane in one embodiment of the rail-mounted lifting device of the present invention is shown.

[0032] In the picture:

[0033] 1. Load-bearing platform; 11. First load-bearing section; 12. Second load-bearing section; 13. First connecting beam; 14. Second connecting beam;

[0034] 2. Lifting device; 21. Lifting unit; 211. Guide rod; 212. Chord; 212a. First connecting part; 22. Support unit; 213. Web rod; 214. Base plate; 214a. Second connecting part; 215. Driving component; 23. Locking mechanism; 231. Locking pin; 232. First locking hole; 233. Second locking hole; 24. Connecting unit;

[0035] 3. Walking mechanism;

[0036] 100. Roadbed box; 200. Track. Detailed Implementation

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not 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 limiting the scope of protection of this invention.

[0039] Track-mounted cranes require a lifting device for track changing and relocation. In related technologies, this lifting device is typically mounted on a roadbed box. Before track changing or relocation, the lifting device needs to be moved to a designated location on the roadbed box and installed. After the track changing or relocation is complete, the lifting device needs to be disassembled, moved, and stored for future use. Due to reliability requirements, the lifting device is usually quite heavy and bulky. Therefore, the processes of assembling, disassembling, and moving the lifting device during track changing and relocation are cumbersome and physically demanding for workers.

[0040] To overcome the problems encountered by rail-mounted cranes during track changing and relocation, as mentioned above, this invention provides a rail-mounted lifting device, as described above. Figure 1 As shown, in some embodiments, the rail-mounted lifting equipment includes a rail-mounted crane and a lifting device 2. The rail-mounted crane includes a crane body and a load-bearing platform 1. The crane body is connected to the load-bearing platform 1. The lifting device 2 is installed on the load-bearing platform 1, and the height of the lifting device 2 is adjustable so that the rail-mounted crane can be raised or lowered relative to the ground.

[0041] By installing the lifting device 2 on the bearing platform 1, the lifting device 2 can move together with the bearing platform 1, thus achieving synchronous movement between the lifting device 2 and the rail crane. Before changing the rail or relocating the rail crane, there is no need to perform cumbersome handling, positioning, and installation operations on the lifting device 2, which greatly simplifies the operation process of changing the rail and relocating the crane, improves work efficiency, and reduces the labor intensity of workers.

[0042] In the above embodiments, the crane body includes lifting execution components such as the boom. During operation, these execution components usually move to different positions. Therefore, the installation position of the lifting device 2 on the bearing platform 1 can be adjusted based on the actual operation to ensure the stability of the lifting process of the rail crane. For example, the installation position of the lifting device 2 can be set by taking into account factors such as the shape of the ground, the center of gravity of the crane body, and the center of gravity distribution of the lifting components of the crane body.

[0043] In some embodiments, the lifting device 2 is detachably connected to the support platform 1 to facilitate adjustment of the installation position of the lifting device 2, and also to facilitate disassembly of the lifting device 2 for storage or transportation after the completion of a phase of work.

[0044] refer to Figure 1 As shown, in some embodiments, the lifting device 2 includes a lifting unit 21 and a support unit 22. The height of the lifting unit 21 is adjustable. The support unit 22 is connected to the lifting unit 21, and the area of ​​the support surface of the support unit 22 that is in contact with the ground is greater than the area of ​​the end face of the lifting unit 21 that is connected to the support unit 22.

[0045] In the above embodiment, the support unit 22 provides a support surface for contacting the ground, avoiding the instability that might arise from directly contacting the ground with the lifting unit 21 during the lifting process of the rail-mounted crane. And referring to... Figure 5As shown, in the operating environment, rail-mounted cranes typically operate on specially laid roadbed boxes 100. Therefore, by setting the area of ​​the support surface to be larger than the area of ​​the end face connecting the lifting unit 21 and the support unit 22, the load is distributed, allowing the pressure from the rail-mounted crane borne by the lifting unit 21 to be dispersed, reducing the stress value transmitted to the roadbed box 100. This improves the support stability of the lifting device 2 and reduces the pressure exerted on the roadbed box 100 by the rail-mounted crane, lowering the probability of damage to the roadbed box 100 under pressure. The support unit 22 can be made of materials with high compressive strength or adopt a structural design with high compressive strength to ensure that it can withstand the load of the rail-mounted crane and extend the service life of the lifting device 2. By setting the support unit 22, the entire rail-mounted crane can maintain balance and stability when lifting or lowering, thereby ensuring the safe operation of the rail-mounted lifting equipment.

[0046] In the embodiments provided by the present invention, the support unit 22 can be a plate structure or a box structure.

[0047] In some embodiments, for the convenience of material sourcing, an existing roadbed box 100 with a support area larger than the area of ​​the end face of the end connected to the support unit 22 of the lifting unit 21 can be directly used as the support unit 22. This eliminates the need to select suitable materials for the support unit 22 and to design the structure of the support unit 22, saving manpower and helping to control the cost of the lifting device 2.

[0048] In related technologies, a single lifting device with a large load-bearing capacity is usually used to lift rail-mounted cranes. This is based on the requirement for the reliability of the lifting device, and also because the lifting device needs to accommodate components such as actuators, resulting in a large size and heavy weight, which is not conducive to installation, handling and transportation.

[0049] Therefore, in some embodiments of the present invention, the lifting unit 21 includes a truss structure.

[0050] Truss structures are characterized by their simple structure, light weight, and high load-bearing capacity. Therefore, compared with related technologies, this invention can effectively reduce the weight of the lifting device 2, improve its ease of installation, handling, and transportation, and meet the transportation requirements of highways or containers. The truss structure can be made of lightweight and high-strength materials that meet the working conditions, based on budget and operational needs, to achieve lightweight design while ensuring structural strength.

[0051] In some embodiments, the lifting unit 21 includes a telescopic assembly, which includes a guide rod 211 and a chord rod 212 sleeved on the outer periphery of the guide rod 211. The chord rod 212 can move relative to the guide rod 211 in the axial direction of the guide rod 211 to adjust the height of the lifting unit 21.

[0052] In addition to the aforementioned telescopic structure, the telescopic assembly can also adopt other structural forms, such as a telescopic hydraulic pump or a sliding groove / rod structure, as long as it can achieve the height adjustment of the lifting unit 21.

[0053] refer to Figure 2a and Figure 2b As shown, in some embodiments, the lifting unit 21 includes multiple sets of web members 213 and multiple telescopic components. The guide rods 211 of the telescopic components are mounted on the support unit 22, and each set of web members 213 is connected between the chords 212 of two adjacent telescopic components.

[0054] By setting up web members 213 to connect two adjacent telescopic components, multiple sets of web members 213 and multiple telescopic components are connected to form a truss structure, which helps to enhance the strength and support stability of the lifting unit 21. The number of telescopic components included in each lifting unit 21 can be selected according to the actual situation, such as considering the lightweight requirements of the lifting unit 21 and the load size during operation.

[0055] refer to Figure 2a , Figure 2b and Figure 3 As shown, in some embodiments, the lifting unit 21 further includes a base plate 214 and a drive member 215. The base plate 214 is connected to the support unit 22, the guide rod 211 is mounted on the base plate 214, and the drive member 215 is connected to both the base plate 214 and the chord rod 212. The drive member 215 is configured to extend or retract to drive the chord rod 212 to move relative to the guide rod 211. Specifically, Figure 2a The diagram shows the lifting state of the lifting unit 21. Figure 2b The diagram shows the retracted state of the lifting unit 21.

[0056] The base plate 214 provides a platform for the installation of the telescopic components, facilitating the integrated arrangement of multiple telescopic components, enhancing structural stability, and improving the overall integrity of the lifting unit 21. This facilitates the overall installation, handling, and transportation of the lifting device 2. The driving component 215 can be of various structural forms, such as a cylinder, hydraulic cylinder, threaded screw structure, or gear and rack structure, as long as it can realize the function of driving the chord 212 to move.

[0057] In some embodiments, the chord 212 is provided with two or more first connecting portions 212a, which are evenly arranged along the outer periphery of the chord 212. The base plate 214 is provided with second connecting portions 214a that correspond one-to-one with the two or more first connecting portions 212a. The telescopic assembly includes two or more driving members 215, and the two ends of the driving members 215 are respectively connected to the corresponding first connecting portions 212a and second connecting portions 214a.

[0058] refer to Figure 2a and Figure 2b As shown, in the above embodiment, two or more driving members 215 are evenly arranged along the outer periphery of the chord 212, thereby providing a balanced power source and stable support for the movement of the chord 212, ensuring the operational reliability of the lifting unit 21. Furthermore, the structural forms of the first connecting portion 212a and the second connecting portion 214a can be selected in various ways, for example, in... Figure 3 and Figure 4 In the embodiment shown, the first connecting part 212a and the second connecting part 214a are both hinge structures, and the two ends of the driving member 215 are respectively hinged to the corresponding first connecting part 212a and the second connecting part 214a.

[0059] In some embodiments, the rail-mounted lifting device further includes a controller that is signal-connected to two or more drive elements 215 to control the two or more drive elements 215 to extend or retract synchronously.

[0060] By synchronously controlling the actions of two or more drive components 215, a symmetrical and stable driving force can be provided for the extension or retraction of the telescopic assembly, thereby ensuring the stability and reliability of the lifting process of the rail crane.

[0061] In practical applications, after the jacking of the rail-mounted crane is completed, operations such as relocation and track changing are usually required. In this case, it is necessary to maintain the rail-mounted crane at a stable jacking height to ensure the smooth progress of subsequent operations.

[0062] Therefore, refer to Figure 2a As shown, in some embodiments, the lifting device 2 further includes a locking mechanism 23, which is configured to lock the relative positions of the guide rod 211 and the chord rod 212 when the height of the lifting unit 21 reaches a preset value.

[0063] The locking mechanism 23 can take many forms, such as a slot structure, a self-locking structure with pin hole cooperation, or an electrically controlled magnetic lock, as long as it can provide stable support for the rail crane when the height of the lifting unit 21 reaches the preset value, thus ensuring reliability and safety.

[0064] In such Figure 2a , Figure 2b and Figure 3In the illustrated embodiment, the locking mechanism 23 includes a locking pin 231 and a first locking hole 232 respectively disposed on the guide rod 211 and a second locking hole 233 disposed on the chord rod 212. When the height of the lifting unit 21 reaches a preset value, the relative positions of the guide rod 211 and the chord rod 212 are locked by the locking pin 231 passing through the first locking hole 232 and the second locking hole 233, thereby maintaining the lifting unit 21 at a stable height. Multiple first locking holes 232 and second locking holes 233 can be provided as needed to adjust the height of the lifting unit 21.

[0065] refer to Figure 1 and Figure 4 As shown, in some embodiments, the lifting device 2 further includes a connecting unit 24, which is connected to the end of the lifting unit 21 away from the support unit 22, and the connecting unit 24 is hinged to the bearing platform 1.

[0066] In the above embodiments, the connecting unit 24 can also adopt a truss structure and achieve integrated connection with the lifting unit 21, enhancing the overall stability and realizing the lightweight design of the lifting device 2. The connecting unit 24 and the bearing platform 1 can be connected in various ways, such as bolt connection, pin connection, etc., as long as the support stability of the lifting device 2 can be guaranteed, or it can be easily disassembled and assembled for subsequent maintenance.

[0067] When lifting a rail-mounted crane, the relevant technology typically uses two lifting devices. These devices are installed on the roadbed box where the crane operates, positioned on the left and right sides below the crane's load-bearing platform. However, the weight of the front section of the rail-mounted crane is usually greater than that of the rear section. After the lifting devices lift the entire crane, the crane relies solely on the two lifting devices to contact the roadbed box, making stability difficult to guarantee and posing a significant safety hazard.

[0068] Therefore, refer to Figure 1 As shown, in some embodiments, the rail-mounted crane includes multiple lifting devices 2, and the bearing platform 1 includes a first bearing portion 11 and a second bearing portion 12 arranged along its length. The first bearing portion 11 is used to support the lifting structure of the rail-mounted crane, and the second bearing portion 12 is used to support the counterweight structure of the rail-mounted crane. The number of lifting devices 2 arranged around the first bearing portion 11 is equal to the number of lifting devices 2 arranged around the second bearing portion 12.

[0069] By setting up multiple lifting devices 2 and arranging them around the first bearing part 11 and the second bearing part 12, the load can be distributed, the stress value transmitted to the roadbed box 100 can be reduced, the roadbed box 100 under construction can be protected, the rail crane can be stably supported, and the lifting action can be guaranteed to be smooth and reliable.

[0070] Based on the terrain, vehicle posture, and load conditions of the rail crane's lifting and counterweight structures, multiple lifting devices 2 can be independently or collaboratively controlled to adjust their lifting speed and force, thereby ensuring the stability and smoothness of the entire rail crane during the lifting process.

[0071] refer to Figure 1 As shown, in some embodiments, the support platform 1 further includes a first connecting beam 13 and a second connecting beam 14 extending along its length direction. The first connecting beam 13 and the second connecting beam 14 are arranged in parallel and are respectively connected to the first support portion 11 and the second support portion 12. Four lifting devices 2 are provided between the first support portion 11 and the second support portion 12, wherein two lifting devices 2 are installed on the first connecting beam 13 and arranged along its length direction, and the other two lifting devices 2 are installed on the second connecting beam 14 and arranged along its length direction. Two lifting devices 2 are provided on the side of the first support portion 11 away from the second support portion 12, and the two lifting devices 2 are respectively installed on the first connecting beam 13 and the second connecting beam 14. Two lifting devices 2 are provided on the side of the second support portion 12 away from the first support portion 11, and the two lifting devices 2 are respectively installed on the first connecting beam 13 and the second connecting beam 14.

[0072] In the above embodiment, the bearing platform 1 has a frame structure. Four lifting devices 2 are arranged around the first bearing part 11 and the second bearing part 12. The four lifting devices 2 can be evenly distributed around the first bearing part 11 and / or the second bearing part 12, or their arrangement can be adjusted according to their actual load conditions, as long as the rail crane is stably supported.

[0073] The following describes a specific embodiment of the rail-mounted lifting device of the present invention:

[0074] refer to Figures 1-5 As shown, the present invention provides a rail-mounted lifting device, which includes a rail-mounted crane and a lifting device 2. The lifting device 2 is used to assist the rail-mounted crane in changing rails. The rail-mounted crane includes a crane body, a load-bearing platform 1, and a traveling mechanism 3. The crane body is connected to the load-bearing platform 1, and the lifting device 2 is installed on the load-bearing platform 1. The height of the lifting device 2 is adjustable so that the rail-mounted crane can be raised or lowered relative to the ground.

[0075] The rail-mounted crane of the present invention includes a front carriage and a rear carriage. The front carriage is the part of the rail-mounted crane used for lifting loads, and the rear carriage is the part of the rail-mounted crane used for placing counterweights. The weight of the front carriage is usually greater than that of the rear carriage.

[0076] Referring to Figure 1, the support platform 1 includes a first support section 11 and a second support section 12 arranged along its length. The first support section 11 supports the lifting structure of the crane body, and the second support section 12 supports the counterweight structure of the crane body. The front carriage of the rail-mounted crane includes the first support section 11 and the lifting structure of the crane body, and the rear carriage of the rail-mounted crane includes the second support section 12 and the counterweight structure of the crane body. The support platform 1 also includes a first connecting beam 13 and a second connecting beam 14 extending along its length. The first connecting beam 13 and the second connecting beam 14 are arranged in parallel and are respectively connected to the first support section 11 and the second support section 12.

[0077] refer to Figure 5 As shown, in the working environment, the rail-mounted crane runs on a circular or straight track 200, which is laid on a roadbed box 100. On the track 200 are the traveling mechanism 3 and the load-bearing platform 1, whose main functions are to travel and bear or distribute and balance the load transmitted from the crane body.

[0078] In this embodiment, four truss-type lifting devices 2 are installed around the front and rear carriages of the rail-mounted crane. Each lifting device 2 includes a lifting unit 21, a support unit 22, and a connecting unit 24. The height of the lifting unit 21 is adjustable. The connecting unit 24, the lifting unit 21, and the support unit 22 are connected sequentially. The connecting unit 24 is connected to the platform hinge point, and the lifting unit 21 is connected to the support unit 22. The lifting devices 2 are evenly distributed around the front and rear carriages of the rail-mounted crane. They can bear the load transmitted from above and effectively reduce the stress value transmitted to the roadbed box 100 to avoid damage to the roadbed box 100.

[0079] refer to Figure 2a , Figure 2b and Figure 3 As shown, the lifting device 2 includes a structural component, a driving component 215, and a locking mechanism 23. The rail-mounted lifting equipment includes a controller for controlling the operation of the driving component 215. In this embodiment, the driving component 215 is a hydraulic cylinder. The locking mechanism 23 includes a locking pin 231, a first locking hole 232, and a second locking hole 233.

[0080] The structural components include a base plate 214, four vertical guide rods 211 welded to the base plate 214, and a truss structure that cooperates with the four guide rods 211. The truss structure is welded from high-strength tubing and includes multiple sets of web members 213 and multiple guide rods 211. Chord members 212 are sleeved on the outer periphery of the guide rods 211, and each set of web members 213 is connected between two adjacent chord members 212. Hydraulic cylinder connecting hinges (first connecting part 212a and second connecting part 214a) are welded on both the chord 212 and the base plate 214. Pin holes (first locking hole 232 and second locking hole 233) are machined on the guide rod 211 and the chord 212. The hydraulic cylinders are evenly distributed around the guide rod 211 and the chord 212 to ensure uniform force distribution. The chord 212 can slide up and down and lock along the guide rod 211 (achieved through locking mechanism 23). The controller can drive the truss structure above the guide rod 211 to rise and fall along the guide rod 211 by controlling the extension and retraction of the hydraulic cylinders. After reaching the preset height, the truss structure and the guide rod 211 can be locked by inserting the locking pin 231, thereby keeping the lifting device 2 at a fixed height.

[0081] In this embodiment, each lifting device 2 can be individually controlled and adjusted, or they can be controlled uniformly to coordinate their actions, ensuring stable support and smooth operation of the rail-mounted crane, and distributing the load to reduce the stress value transmitted to the ordinary roadbed box. When the rail-mounted crane needs to change tracks, the controller controls the extension of each hydraulic cylinder. Simultaneously, based on the load on the lifting devices 2 around the front and rear vehicles and the overall vehicle posture, the controller independently controls or coordinates the lifting speed and force of each lifting device 2 to ensure the stability and smooth operation of the entire rail-mounted crane during the lifting process.

[0082] After the rail-mounted crane is lifted to the preset height, the first locking hole 232 on the guide rod 211 and the second locking hole 233 on the chord rod 212 on the lifting device 2 are connected and fixed by the locking pin 231 to maintain the vehicle at the preset height. In this state, the operator can safely operate the traveling mechanism 3 of the rail-mounted crane to complete the track-changing action. After the track-changing is completed, the locking pins 231 on each lifting device 2 are removed, and the cylinder is controlled by the controller to retract and lower the vehicle height, so that the traveling mechanism 3 contacts the rail 200 and the traveling function is restored. Since the lifting device 2 is hinged to the bearing platform 1, it can be moved short distances with the rail-mounted crane without disassembly or assembly.

[0083] Through the description of several embodiments of the rail-mounted lifting device of the present invention, it can be seen that the rail-mounted lifting device of the present invention has at least the following advantages:

[0084] By installing the lifting device on the rail-mounted crane, the lifting device can move together with the rail-mounted crane. Before changing the rails and moving the crane, there is no need to carry out tedious operations such as handling, positioning and installation of the lifting device, which improves work efficiency and reduces the labor intensity of workers.

[0085] Using a truss structure in the lifting unit has the advantages of simple structure, light weight, and large load-bearing capacity. It can effectively reduce the weight of the lifting device, improve the convenience of its installation, handling and transportation, and meet the transportation requirements of highways or containers.

[0086] Setting up multiple jacking devices for jacking the rail crane can distribute the load, reduce the stress value transmitted from the rail crane to the roadbed box, protect the roadbed box under construction, provide stable support for the rail crane, and ensure that the jacking operation is smooth and reliable.

[0087] Multiple lifting devices can be controlled and adjusted individually or uniformly. This allows for independent control or coordinated adjustment of the lifting speed and force of each lifting device based on the load around the front and rear carriages of the rail crane and the overall vehicle posture, ensuring the stability and smooth operation of the rail crane throughout the lifting process.

[0088] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of the present invention or equivalent substitutions can still be made to some technical features without departing from the principle of the present invention, and such modifications and equivalent substitutions should all be covered within the scope of the technical solutions claimed in the present invention.

Claims

1. A rail-mounted lifting device, characterized in that, include: A rail-mounted crane includes a crane body and a load-bearing platform (1), wherein the crane body is connected to the load-bearing platform (1); and A lifting device (2) is installed on the bearing platform (1), and the height of the lifting device (2) is adjustable so that the rail crane can be raised or lowered relative to the ground; The lifting device (2) is detachably connected to the bearing platform (1) so as to facilitate the adjustment of the installation position of the lifting device (2); The lifting device (2) includes a lifting unit (21) and a support unit (22). The height of the lifting unit (21) is adjustable, and the support unit (22) is connected to the lifting unit (21). The lifting unit (21) includes a truss structure; The lifting unit (21) includes a telescopic assembly, which includes a guide rod (211) and a chord rod (212) sleeved on the outer periphery of the guide rod (211). In the axial direction of the guide rod (211), the chord rod (212) can move relative to the guide rod (211) to adjust the height of the lifting unit (21). The lifting unit (21) includes multiple sets of web members (213) and multiple telescopic components. The guide rod (211) of the telescopic component is installed on the support unit (22). Each set of web members (213) is connected between the chord members (212) of two adjacent telescopic components. The lifting unit (21) further includes a base plate (214) and a drive member (215). The base plate (214) is connected to the support unit (22). The guide rod (211) is mounted on the base plate (214). The drive member (215) is connected to the base plate (214) and the chord (212) respectively. The drive member (215) is configured to extend or shorten to drive the chord (212) to move relative to the guide rod (211). The lifting device (2) further includes a connecting unit (24), which is connected to the end of the lifting unit (21) away from the support unit (22) and is hinged to the bearing platform (1).

2. The rail-mounted lifting device according to claim 1, characterized in that, The area of ​​the support surface of the support unit (22) that is in contact with the ground is greater than the area of ​​the end face of the lifting unit (21) that is connected to the support unit (22).

3. The rail-mounted lifting device according to claim 1, characterized in that, The chord (212) is provided with two or more first connecting parts (212a), which are evenly arranged along the outer periphery of the chord (212). The base plate (214) is provided with second connecting parts (214a) that correspond one-to-one with the two or more first connecting parts (212a). The telescopic assembly includes two or more driving members (215), and the two ends of the driving members (215) are respectively connected to the corresponding first connecting parts (212a) and second connecting parts (214a).

4. The rail-mounted lifting device according to claim 1, characterized in that, It also includes a controller that is signal-connected to two or more of the drive elements (215) to control the two or more drive elements (215) to extend or shorten synchronously.

5. The rail-mounted lifting device according to claim 1, characterized in that, The lifting device (2) further includes a locking mechanism (23), which is configured to lock the relative position of the guide rod (211) and the chord rod (212) when the height of the lifting unit (21) reaches a preset value.

6. The rail-mounted lifting device according to claim 1, characterized in that, The lifting device (2) includes a plurality of such lifting devices. The bearing platform (1) includes a first bearing part (11) and a second bearing part (12) arranged along its length. The first bearing part (11) is used to support the lifting structure of the rail crane, and the second bearing part (12) is used to support the counterweight structure of the rail crane. The number of lifting devices (2) arranged around the first bearing part (11) is equal to the number of lifting devices (2) arranged around the second bearing part (12).

7. The rail-mounted lifting device according to claim 6, characterized in that, The bearing platform (1) further includes a first connecting beam (13) and a second connecting beam (14) extending along its length direction. The first connecting beam (13) and the second connecting beam (14) are arranged in parallel and are respectively connected to the first bearing part (11) and the second bearing part (12). Four lifting devices (2) are provided between the first bearing part (11) and the second bearing part (12), wherein two of the lifting devices (2) are installed on the first connecting beam (13) and arranged along its length direction, and the other two lifting devices (2) are installed on the second connecting beam (14) and arranged along its length direction; Two lifting devices (2) are provided on the side of the first bearing part (11) away from the second bearing part (12), and the two lifting devices (2) are respectively installed on the first connecting beam (13) and the second connecting beam (14); Two lifting devices (2) are provided on the side of the second bearing part (12) away from the first bearing part (11), and the two lifting devices (2) are respectively installed on the first connecting beam (13) and the second connecting beam (14).

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