Telescopic superlift apparatus and crane

Abstract

A telescopic superlift apparatus and a crane. The telescopic superlift apparatus comprises: a fixed arm (11), a driving mechanism (13), a telescopic arm (12), and a control system (17). The fixed arm is connected to a lifting arm (21) of a crane by means of a tail structure of the superlift apparatus. The driving mechanism is fixedly connected to a middle section of the fixed arm. The fixed arm is provided with an accommodating cavity (101), the accommodating cavity is arranged in the length direction of the fixed arm, and the telescopic arm is arranged in the accommodating cavity. The telescopic arm is connected to the driving mechanism. The driving mechanism can drive the telescopic arm to extend from and retract into the accommodating cavity. On the basis of lifting operation requirements, the control system calculates the length to be adjusted to, and controls the driving mechanism to drive the telescopic arm to extend or retract so as to complete length adjustment. The described superlift apparatus can solve the problem in the existing technology that the length of a superlift apparatus cannot be adjusted when in a vertical lifting state, and can save the costs and facilitate transportation.

Description

Telescopic superlift device and crane Technical Field

[0001] The present application relates to the technical field of engineering machinery, and in particular to a telescopic superlifting device and a crane. Background Art

[0002] By adding a super-lifting device to a crane, the strength, rigidity and lifting performance of the crane boom can be improved. Currently, larger-tonnage cranes (truck cranes, crawler cranes, etc.) are all equipped with a super-lifting device to prevent the boom from shaking left and right during the lifting process. Technical issues

[0003] Existing super-lifting devices are all of fixed length. The length of a super-lifting device corresponds to a lifting parameter. If the lifting performance needs to be further improved, the length of the super-lifting device needs to be increased, or a longer model of super-lifting device needs to be replaced to obtain the required lifting weight. Replacing the super-lifting device is not only costly, but also time-consuming and labor-intensive. In addition, as the lifting weight of the crane becomes larger and larger, the super-lifting device is also getting longer and longer. The length of some super-lifting devices is even longer than the length of the boom, and a separate super-long transport vehicle is required for transportation, which leads to high transportation costs.

[0004] In other existing technologies, the length of the super-lifting device is adjusted by increasing or decreasing the number of sections of the intermediate mast during installation, and then the erection operation is carried out, which is time-consuming and laborious. If adjustment is required during the erection operation, the super-lifting device must be retracted together with the crane boom, the existing super-lifting device must be disassembled, the length must be adjusted with the help of external force, and then the installation and erection operations must be carried out, which is time-consuming and labor-intensive, and reduces work efficiency. Technical Solutions

[0005] In view of this, the object of the present invention is to provide a telescopic super-lifting device, which can solve the problem in the prior art that the super-lifting device cannot adjust its length in the erected state, improve the lifting capacity, save costs, and facilitate transportation.

[0006] The present invention provides a telescopic super-lifting device, including a fixed arm, a driving mechanism, a telescopic arm and a control system. The driving mechanism is fixedly connected to the middle section of the fixed arm. The fixed arm is provided with a accommodating cavity, which is arranged along the length direction of the fixed arm. The telescopic arm is arranged in the accommodating cavity. The telescopic arm is connected to the driving mechanism. The driving mechanism can drive the telescopic arm to extend and retract in the accommodating cavity. The control system calculates the required adjusted length according to the lifting operation requirements, and controls the driving mechanism to drive the telescopic arm to extend or retract to complete the length adjustment.

[0007] In one embodiment, the fixed arm is fixedly connected to a plurality of reinforcing structures, and each of the reinforcing structures is arranged at equal intervals or unequal intervals along the length direction of the fixed arm. Each of the reinforcing structures is respectively provided with a fixing hole, and a fastener is provided at the end of the telescopic arm, and the fastener passes through the fixing hole to fix the telescopic arm to the fixed arm.

[0008] In one embodiment, a plurality of guide blocks are fixedly connected to the accommodating cavity, and each guide block is arranged along the length direction of the fixed arm; or a plurality of guide blocks are fixedly connected to the telescopic arm, and each guide block is arranged along the length direction of the telescopic arm.

[0009] In one embodiment, the driving mechanism includes a hydraulic motor, multiple guide wheels and a chain. The hydraulic motor is fixedly connected to the middle section of the fixed arm, and each guide wheel is fixedly connected to the fixed arm. Each guide wheel is arranged along the length direction of the fixed arm. The chain is mounted on the hydraulic motor and each guide wheel. The tail of the telescopic arm is fixedly connected to the chain. When the hydraulic motor drives the chain to rotate, the chain can drive the telescopic arm to move.

[0010] In one embodiment, the driving mechanism includes a fixed support and a driving cylinder, the fixed support is fixedly connected to the middle section of the fixed arm, the fixed support is arranged in the accommodating cavity, one end of the driving cylinder is connected to the fixed support, and the other end of the driving cylinder is fixedly connected to the tail of the telescopic arm, and the driving cylinder can drive the telescopic arm to move in the accommodating cavity.

[0011] In one embodiment, the fastener is a pin cylinder, which is connected to the tail of the telescopic arm. The pin cylinder includes a first pin and a second pin that are arranged opposite to each other. The reinforcement structure includes a first reinforcement part and a second reinforcement part. The first reinforcement part is fixedly connected to one side of the fixed arm, and the second reinforcement part is fixedly connected to the other side of the fixed arm. The first reinforcement part and the second reinforcement part are arranged opposite to each other. The telescopic arm can be fixedly connected to the first reinforcement part through the first pin, and the telescopic arm can be fixedly connected to the second reinforcement part through the second pin.

[0012] In one embodiment, the telescopic super-lifting device further comprises a rear tensioning mechanism, one end of which is rotatably connected to the telescopic arm, and the other end of which is connected to the boom of the crane.

[0013] In one embodiment, the rear tensioning mechanism includes a plurality of fixed pull plates and at least one adjustable pull plate, the fixed pull plates are rotatably connected to each other, and the adjustable pull plate is rotatably connected to the fixed pull plate away from one end of the telescopic arm.

[0014] In one embodiment, the control system includes a central controller and a detection element. The central controller is provided with software for calculating and controlling the length of the super-lifting device. The central controller calculates the length to be adjusted according to the lifting operation requirements, and controls the driving mechanism to drive the telescopic arm to extend or lock back to complete the length adjustment. The detection element is a plurality of electronic components installed at the monitoring point of the telescopic super-lifting device, monitors the length of the telescopic super-lifting device and the result of the length adjustment, and feeds the result back to the control system.

[0015] The present invention also relates to a crane comprising the telescopic super-lifting device mentioned above.

[0016] The fixed arm of the telescopic super-lifting device of the present invention is provided with a accommodating cavity, the telescopic arm is arranged in the accommodating cavity, and the driving mechanism is connected between the fixed arm and the telescopic arm, so that the driving mechanism can drive the telescopic arm to move in the accommodating cavity along the length direction of the accommodating cavity. In addition, the present invention also performs calculations, monitoring and control length adjustment through a control system, so that the telescopic super-lifting device can complete length adjustment in the erected state. Telescopic super-lifting devices of different lengths can correspond to different lifting weights, thereby improving work efficiency and lifting weight; in addition, the telescopic super-lifting device with adjustable length can retract the telescopic arm into the accommodating cavity during transportation. At this time, the length of the telescopic super-lifting device is shorter, which can meet the transportation requirements, facilitate transportation, and save costs. Beneficial effects

[0017] The telescopic super-lifting device provided in the present application sets the driving mechanism in the fixed arm and connects the driving mechanism to the telescopic arm. The driving mechanism drives the telescopic arm to extend or retract to complete the length adjustment, thereby improving the lifting capacity, saving costs, and facilitating transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0019] FIG1 is a schematic structural diagram of a telescopic super-lifting device according to a first embodiment of the present invention from one perspective.

[0020] FIG2 is a schematic structural diagram of the telescopic arm of the telescopic super-lifting device according to the first embodiment of the present invention when it is retracted.

[0021] FIG3 is a schematic structural diagram of the telescopic super-lifting device according to the first embodiment of the present invention when the telescopic arm is extended.

[0022] FIG4 is an enlarged structural diagram of point A in FIG3 .

[0023] FIG5 is a schematic cross-sectional view of the telescopic super-lifting device according to the first embodiment of the present invention at the tail end of the telescopic arm.

[0024] FIG6 is a schematic structural diagram of the telescopic super-lifting device of the first embodiment of the present invention after erection.

[0025] FIG. 7 is a schematic diagram of a control system according to a first embodiment of the present invention.

[0026] FIG8 is a schematic structural diagram of a telescopic super-lifting device according to a second embodiment of the present invention.

[0027] Description of the drawings: fixed arm-11; accommodating chamber-101; first pin hole-102; second pin hole-103; reinforcement structure-111; telescopic arm-12; driving mechanism-13; hydraulic motor-131; chain-132; first guide wheel-1331; second guide wheel-1332; tensioning wheel-1333; connecting block-134; fixed support-135; driving cylinder-136; rear tensioning mechanism-14; fixed pull plate-141; adjustable pull plate-142; guide block-15; pin cylinder-16; first pin-161; second pin-162; control system-17; central controller-171; detection element-172; boom-21. Modes for Carrying Out the Invention

[0028] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the described embodiments are merely some, and not all, of the embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the description of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0029] In the description of the present invention, unless otherwise specified or limited, the terms "disposed," "installed," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of these terms based on the specific circumstances.

[0030] The directions or positional relationships indicated by terms such as "upper", "lower", "left", "right", "front", "back", "top", "bottom", "inside" and "outside" are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience and simplification of description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0031] The terms "first," "second," "third," etc. are merely used to distinguish elements of similar nature and do not indicate or imply relative importance or a particular order.

[0032] The terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than the listed elements and may also include additional elements not specifically listed.

[0033] As shown in Figures 1 to 6, the telescopic super-lifting device is installed on the boom 21 of the crane. Telescopic super-lifting devices are provided on both sides of the boom 21 in the width direction. The telescopic super-lifting devices on both sides are expanded or retracted together to prevent the boom 21 from shaking left and right during the lifting process, while increasing the rigidity and strength of the boom 21; the telescopic super-lifting device includes a fixed arm 11, a telescopic arm 12, a driving mechanism 13 and a control system 17. The fixed arm 11 is connected to the boom 21 of the crane through a super-lifting tail structure. The driving mechanism 13 is fixedly connected to the middle section of the fixed arm 11. The fixed arm 11 is provided with a accommodating chamber 101. The accommodating chamber 101 is arranged along the length direction of the fixed arm 11, and the telescopic arm 12 is arranged in the accommodating chamber. In the housing 101, the telescopic arm 12 is connected to the drive mechanism 13. The drive mechanism 13 can drive the telescopic arm 12 to move within the housing 101. The control system 17 calculates the required length adjustment according to the lifting operation requirements and controls the drive mechanism 13 to drive the telescopic arm 12 to extend or retract to complete the length adjustment, thereby achieving the adjustable length of the super-lifting device. Super-lifting devices of different lengths can correspond to different lifting weights. In addition, the length-adjustable super-lifting device can retract the telescopic arm 12 into the housing 101 during transportation. At this time, the length of the telescopic super-lifting device is shorter, which can meet transportation requirements, facilitate transportation, and save costs. In this embodiment, the fixed arm 11 is, for example, a truss structure or a box beam structure, and the telescopic arm 12 is a box beam structure. The telescopic arm 12 is nested in the housing 101 of the fixed arm 11 and can be extended and retracted within the housing 101 to meet different lifting performance requirements. It can be understood that the telescopic arm 12 in this embodiment is partially disposed in the accommodating cavity 101 , but is not completely disposed in the accommodating cavity 101 of the fixed arm 11 .

[0034] The fixed arm 11 of the telescopic super-lifting device of the present invention is provided with a accommodating chamber 101, the telescopic arm 12 is arranged in the accommodating chamber 101, and the driving mechanism 13 is connected between the fixed arm 11 and the telescopic arm 12, so that the driving mechanism 13 can drive the telescopic arm 12 to move in the accommodating chamber 101 along the length direction of the accommodating chamber 101. In addition, the present invention also performs calculations, monitoring and control length adjustment through the control system 17, so that the telescopic super-lifting device can complete the length adjustment in the erected state. Telescopic super-lifting devices of different lengths can correspond to different lifting weights, thereby improving work efficiency and lifting weight; in addition, the telescopic super-lifting device with adjustable length can retract the telescopic arm into the accommodating chamber during transportation. At this time, the length of the telescopic super-lifting device is shorter, which can meet the transportation requirements, facilitate transportation, and save costs.

[0035] As shown in FIG2 , the fixed arm 11 is fixedly connected to a plurality of reinforcement structures 111. Each reinforcement structure 111 is arranged at equal or unequal intervals along the length of the fixed arm 11. Each reinforcement structure 111 is provided with a fixing hole. The end of the telescopic arm 12 is provided with a fastener, which passes through the fixing hole to secure the telescopic arm 12 to the fixed arm 11. Therefore, the distance between two adjacent reinforcement structures 111 is L. As shown in FIG2 , the distances between two adjacent reinforcement structures 11 are L1, L2, ..., Ln, respectively. The lengths of L1, L2, ..., Ln can be the same or different and can be designed according to actual conditions. Since the telescopic arm 111 is fixedly connected to the reinforcement structure 111, the lengths of L1, L2, ..., Ln represent the adjustable lengths of the telescopic arm 12. In this embodiment, the reinforcement structures 111 and the fixed arm 11 are preferably welded together. The reinforcement structures 111 are used to strengthen the structural strength of the connection between the rear end of the telescopic arm 12 and the fixed arm 11.

[0036] As shown in Figure 5, the fastener is a pin cylinder 16, which is installed at the tail of the telescopic arm 12. The pin cylinder 16 includes a first pin 161 and a second pin 162 that are relatively arranged. The reinforcement structure 111 includes a first reinforcement part and a second reinforcement part that are symmetrically arranged. The first reinforcement part and the second reinforcement part are respectively fixedly connected to the two side surfaces of the fixed arm 11. The fixing hole includes a first pin hole 102 and a second pin hole 103. The first pin hole 102 is set through the first reinforcement part, and the second pin hole 103 is set through the second reinforcement part. The pin cylinder 16 can drive the first pin 161 and the second pin 162 to be set in the first pin hole 102 and the second pin hole 103 respectively. When the pin cylinder 16 drives the first pin 161 to retract from the first latch hole 102, and the pin cylinder 16 drives the second pin 162 to retract from the second latch hole 103, the telescopic arm 12 is disconnected from the fixed arm 11, and the telescopic arm 12 can be extended and retracted within the accommodating cavity 101 along the length of the fixed arm 11. When the telescopic arm 12 is extended and retracted to the desired position, the pin cylinder 16 drives the first pin 161 and the second pin 162 to insert into the first latch hole 102 and the second latch hole 103, respectively, thereby locking the telescopic arm 12 and the fixed arm 11.

[0037] As shown in Figure 5, a plurality of guide blocks 15 are fixedly connected in the accommodating cavity 101, and each guide block 15 is arranged along the length direction of the fixed arm 11; wherein, the guide block 15 includes a plurality of guide parts, and each guide part is arranged around the inner wall of the accommodating cavity 101; the guide block 15 guides the telescopic arm 12 to prevent the telescopic arm 12 from being offset during the telescopic process.

[0038] In another preferred embodiment, the telescopic arm 12 is fixedly connected to a plurality of guide blocks 15, each of which is arranged along the length of the telescopic arm 12. The guide blocks 15 include multiple guide portions, each of which is arranged around the inner wall of the accommodating cavity 101. The guide blocks 15 guide the telescopic arm 12 to prevent the telescopic arm 12 from deflecting during extension and retraction.

[0039] As shown in Figures 2, 3, and 4, the drive mechanism 13 includes a hydraulic motor 131, a plurality of guide wheels, and a chain 132. The hydraulic motor 131 is fixedly connected to the middle section of the fixed arm 11. Each guide wheel is fixedly connected to the fixed arm 11 and is arranged along the length of the fixed arm 11. The chain 132 is sleeved on the hydraulic motor 131 and the guide wheels. A connecting block 134 is fixedly connected to the rear end of the telescopic arm 12. The connecting block 134 is fixedly connected to the chain 132 via a connector. When the hydraulic motor 131 drives the chain 132 to rotate, the chain 132 can drive the telescopic arm 12 to move. In this embodiment, the connecting block 134 is connected to the telescopic arm 12 by welding. The connecting member is preferably a pin, one end of which is connected to the connecting block 134 and the other end of which is inserted into the chain 132 hole of the chain 132. The guide wheels include two first guide wheels 1331, multiple second guide wheels 1332, and a tensioning wheel 1333. The two first guide wheels 1331 are located at both ends of the chain 132. The distance between the two first guide wheels 1331 determines the telescopic length of the telescopic arm 12. The second guide wheels 1332 are spaced apart along the length of the fixed arm 11. The multiple second guide wheels 1332 are located between the two first guide wheels 1331. The hydraulic motor 131 is located between the first guide wheels 1331 and the tensioning wheel 1333. The tensioning wheel 1333 is used to tension the chain 132 to prevent it from loosening. The rotation of the hydraulic motor 131 drives the movement of the chain 132, thereby driving the telescopic arm 12 to extend and retract.

[0040] As shown in Figures 2 and 6 , the telescopic superlifting device also includes a rear tensioning mechanism 14. One end of the rear tensioning mechanism 14 is rotatably connected to the telescopic arm 12, and the other end of the rear tensioning mechanism 14 is connected to the crane's boom 21. The length of the rear tensioning mechanism 14 matches the length of the telescopic superlifting device, which is the sum of the length of the fixed arm 11 and the length of the telescopic arm 12 extending outside the accommodating chamber 101.

[0041] As shown in Figures 2 and 6, the rear tensioning mechanism 14 includes a plurality of fixed pull plates 141 and at least one adjustable pull plate 142. The fixed pull plates 141 are rotatably connected to each other, so that the rear tensioning mechanism 14 can be folded up when not in use to save space. The adjustable pull plate 142 is rotatably connected to the fixed pull plate 141 away from one end of the telescopic arm 12, that is, the adjustable pull plate 142 is located at the tail of the rear tensioning mechanism 14. The connection method is preferably a pin connection. By increasing or decreasing the number of adjustable pull plates 142 to adjust the length of the rear tensioning mechanism 14, the length of the rear tensioning mechanism 14 is matched with the length of the telescopic super-lifting device. The length of the telescopic super-lifting device refers to the sum of the length of the fixed arm 11 and the length of the telescopic arm 12 extending out of the accommodating cavity 101.

[0042] As shown in Figure 7, the control system 17 includes a central controller 171 and detection elements 172. The central controller 171 contains software for calculating and controlling the length of the telescopic super-lifting device. It can calculate the required length adjustment based on the lifting operation requirements and then issue instructions to control the drive mechanism 13 to extend or retract the telescopic arm 12 to achieve length adjustment. The detection elements 172 are a number of electronic components installed at monitoring points on the telescopic super-lifting device. They monitor the length of the telescopic super-lifting device and whether length adjustment is complete, and feedback the results to the control system 17. For example, with different boom 21 lengths and amplitudes, the telescopic super-lifting device can maintain the same length to correspond to different lifting weights; alternatively, with the same boom 21 length and amplitude, the telescopic super-lifting device can be adjusted to correspond to different lifting weights.

[0043] Telescopic superlift device length adjustment process:

[0044] First, retract the first pin 161 and the second pin 162 of the pin cylinder 16 at the tail of the telescopic arm 12, and then use the driving mechanism 13 to drive the telescopic arm 12 to move. After reaching the desired position, the first pin 161 and the second pin 162 of the pin cylinder 16 are respectively extended and set in the fixing holes (i.e., the first pin hole 102 and the second pin hole 103) to lock the telescopic arm 12 and the fixed arm 11.

[0045] Length adjustment of telescopic superlift device before crane operation:

[0046] First, according to the needs of the lifting operation, such as the weight, amplitude, height and other requirements of the lifting cargo, look up the lifting performance table and find the corresponding length parameters of the telescopic super-lifting device. Then extend the telescopic arm 12 to the required length and adjust the length of the rear tensioning device accordingly. Adjustments are made by increasing or decreasing the adjustable pull plate 142. Then, according to the operating procedures of the telescopic super-lifting device, erection and tensioning operations are performed, and the crane starts working.

[0047] Length adjustment of telescopic superlift device during crane operation:

[0048] When adjusting during operation, first look up the lifting performance table according to the needs of the lifting operation, such as the weight, amplitude, height and other requirements of the lifted cargo, input the length adjustment instruction to the central controller 171, find the corresponding telescopic super-lifting device length parameters, and then put the crane in the empty hook state, and the telescopic super-lifting device tilts toward the tail of the rear boom 21, so that the rear tensioning device is in a relaxed state. By increasing or decreasing the length of the adjustable pull plate 142 to adjust the length of the rear tensioning device, the drive mechanism 13 is controlled to extend / retract the telescopic arm 12 to the required length. Finally, according to the operating procedure of the telescopic super-lifting device, the erection and tensioning operations are performed, and the crane starts working; the detection element 172 monitors and provides real-time feedback on the adjustment status during this process.

[0049] Second embodiment

[0050] As shown in FIG8 , the telescopic super-lifting device of this embodiment is substantially similar in structure to the telescopic super-lifting device of the first embodiment, except that the structure of the driving mechanism 13 is different.

[0051] Specifically, the driving mechanism 13 includes a fixed support 135 and a driving cylinder 136. The fixed support 135 is fixedly connected to the middle section of the fixed arm 11, and the fixed connection method is preferably welding. The fixed support 135 is arranged in the accommodating cavity 101, and one end of the driving cylinder 136 is connected to the fixed support 135, and the other end of the driving cylinder 136 is fixedly connected to the tail of the telescopic arm 12. The driving cylinder 136 can drive the telescopic arm 12 to move in the accommodating cavity 101, wherein the cylinder body of the driving cylinder 136 can be arranged inside the telescopic arm 12. The telescopic arm 12 is a box beam structure with a hollow interior. When the drive cylinder 136 is extended or retracted, it drives the telescopic arm 12 to move within the accommodating chamber 101. When the telescopic end of the drive cylinder 136 is fully extended from the fixed end of the drive cylinder 136, the telescopic arm 12 extends out of the accommodating chamber 101. The length of the telescopic super-lifting device is the sum of the length of the fixed arm 11 and the length of the telescopic arm 12 extending out of the accommodating chamber 101. At this time, the telescopic super-lifting device is at its maximum length. When the telescopic end of the drive cylinder 136 is fully retracted into the fixed end of the drive cylinder 136, the telescopic super-lifting device is at its minimum length. The drive cylinder 136 is preferably a hydraulic cylinder, but may also be a pneumatic cylinder, etc., but is not limited thereto.

[0052] The fixed arm 11 of the telescopic super-lifting device of the present invention is provided with a accommodating chamber 101, the telescopic arm 12 is arranged in the accommodating chamber 101, and the driving mechanism 13 is connected between the fixed arm 11 and the telescopic arm 12, so that the driving mechanism 13 can drive the telescopic arm 12 to move in the accommodating chamber 101 along the length direction of the accommodating chamber 101. In addition, the present invention also performs calculations, monitoring and control length adjustment through the control system 17, so that the telescopic super-lifting device can complete the length adjustment in the erected state. Telescopic super-lifting devices of different lengths can correspond to different lifting weights, thereby improving work efficiency and lifting weight; in addition, the telescopic super-lifting device with adjustable length can retract the telescopic arm into the accommodating chamber during transportation. At this time, the length of the telescopic super-lifting device is shorter, which can meet the transportation requirements, facilitate transportation, and save costs.

[0053] The present invention also relates to a crane comprising the telescopic super-lifting device mentioned above.

[0054] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this invention are intended to be covered by the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A telescopic superlift device, characterized in that, It includes a fixed arm (11), a driving mechanism (13), a telescopic arm (12) and a control system (17). The driving mechanism (13) is fixedly connected to the middle section of the fixed arm (11). The fixed arm (11) is provided with a receiving cavity (101) which is arranged along the length direction of the fixed arm (11). The telescopic arm (12) is arranged in the receiving cavity (101) and is connected to the driving mechanism (13). The driving mechanism (13) can drive the telescopic arm (12) to expand and contract in the receiving cavity (101). The control system (17) calculates the required adjusted length according to the hoisting operation requirements, and controls the driving mechanism (13) to drive the telescopic arm (12) to extend or retract to complete the length adjustment.

2. The telescopic superlift device according to claim 1, wherein, The fixed arm (11) is fixedly connected with a plurality of strengthening structures (111). Each of the strengthening structures (111) is arranged at equal intervals or unequal intervals along the length direction of the fixed arm (11). Each of the strengthening structures (111) is respectively provided with a fixing hole. The end of the telescopic arm (12) is provided with a fastener, and the fastener passes through the fixing hole to fixedly connect the telescopic arm (12) to the fixed arm (11).

3. The telescopic superlift device according to claim 2, characterized in that, A plurality of guiding blocks (15) are fixedly connected in the receiving cavity (101), and each of the guiding blocks (15) is arranged along the length direction of the fixed arm (11); or a plurality of guiding blocks (15) are fixedly connected to the telescopic arm (12), and each of the guiding blocks (15) is arranged along the length direction of the telescopic arm (12).

4. The telescopic superlift device according to claim 3, characterized in that, The guiding block (15) includes a plurality of guiding parts, and each guiding part is arranged around the inner wall of the receiving cavity (101).

5. The telescopic superlift device according to claim 3, characterized in that, The driving mechanism (13) includes a hydraulic motor (131), a plurality of guiding wheels and a chain (132). The hydraulic motor (131) is fixedly connected to the middle section of the fixed arm (11). Each of the guiding wheels is fixedly connected to the fixed arm (11), and each of the guiding wheels is arranged along the length direction of the fixed arm (11). The chain (132) is sleeved on the hydraulic motor (131) and each of the guiding wheels. The tail of the telescopic arm (12) is fixedly connected to the chain (132). When the hydraulic motor (131) drives the chain (132) to rotate, the chain (132) can drive the telescopic arm (12) to move.

6. The telescopic superlift device according to claim 3, wherein The driving mechanism (13) includes a fixed support (135) and a driving cylinder (136). The fixed support (135) is fixedly connected to the middle section of the fixed arm (11). The fixed support (135) is arranged in the receiving cavity (101). One end of the driving cylinder (136) is connected to the fixed support (135), and the other end of the driving cylinder (136) is fixedly connected to the tail of the telescopic arm (12). The driving cylinder (136) can drive the telescopic arm (12) to move in the receiving cavity (101).

7. The telescopic superlift device according to claim 2, wherein, The fastener is a pin cylinder (16), the pin cylinder (16) is connected to the tail of the telescopic boom (12), the pin cylinder (16) includes a first pin (161) and a second pin (162) arranged oppositely, the strengthening structure (111) includes a first strengthening part and a second strengthening part, the first strengthening part is fixedly connected to one side surface of the fixed boom (11), the second strengthening part is fixedly connected to the other side surface of the fixed boom (11), the first strengthening part and the second strengthening part are arranged oppositely, the telescopic boom (12) can be fixedly connected to the first strengthening part through the first pin (161), and the telescopic boom (12) can be fixedly connected to the second strengthening part through the second pin (162).

8. The telescopic superlift device according to claim 1, characterized in that, The telescopic superlift device further includes a rear tensioning mechanism (14), one end of the rear tensioning mechanism (14) is rotatably connected to the telescopic boom (12), and the other end of the rear tensioning mechanism (14) is connected to the boom (21) of the crane.

9. The telescopic superlift device according to claim 8, characterized in that, The rear tensioning mechanism (14) includes a plurality of fixed tensioning plates (141) and at least one adjustable tensioning plate (142), the fixed tensioning plates (141) are rotatably connected to each other, and the adjustable tensioning plate (142) is rotatably connected to the fixed tensioning plate (141) at the end far from the telescopic boom (12).

10. The telescopic superlift device according to claim 1, characterized in that, The control system (17) includes a central controller (171) and a detection element (172). The central controller (171) is provided with software for calculating and controlling the length of the superlift device. The central controller (171) calculates the length to be adjusted according to the requirements of the lifting operation, and controls the drive mechanism (13) to drive the telescopic boom (12) to extend or retract to complete the length adjustment. The detection element (172) is a number of electronic components, installed at the monitoring points of the telescopic superlift device, monitors the length of the telescopic superlift device and the result of the length adjustment, and feeds back the result to the control system (17).

11. A crane, characterized in that, Including the telescopic superlift device according to any one of claims 1 to 10.

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