A boom system for a lifting device, a lifting device and a control method

Abstract

The application discloses an arm support system for a hoisting device, the hoisting device and a control method. The hoisting device comprises a slewing assembly and a main luffing mast rotatably arranged on the slewing assembly. The arm support system comprises a main arm support, a first pull plate and a luffing device. The main arm support comprises a first truss arm, a telescopic arm structure and a second truss arm which are sequentially and detachably connected. One end of the telescopic arm structure of the first truss arm is rotatably arranged on the slewing assembly. One end of the first pull plate is connected to the top of the main luffing mast, and the other end is connected to the telescopic arm structure. The luffing device is used for driving the main luffing mast to rotate along a first set track, and sequentially changing the positions of the main luffing mast and the main arm support. The application can pull up the main arm support with a larger arm length without increasing the output power of the luffing device, and realizes the functions of effectively increasing the arm length of the main arm support and stably pulling up.

Description

Technical Field

[0001] This invention relates to the field of engineering machinery technology, specifically to a boom system, lifting equipment, and control method for lifting equipment. Background Technology

[0002] With the continuous development of lifting equipment, higher requirements are being placed on the length of the main boom. The main boom of lifting equipment in related technologies typically includes a telescopic boom and a secondary boom located at the telescopic end of the boom. The telescopic boom is rotatably mounted on the slewing assembly of the lifting equipment and is connected to the main luffing winch via wire ropes. When the main luffing winch rotates and tightens the wire ropes, the main boom can be raised, increasing the angle between the main boom and the ground to the working angle. However, the main boom of the aforementioned lifting equipment is limited by the torque required for raising, preventing the effective extension of the boom length. Therefore, there is an urgent need for a lifting device that can easily raise and effectively extend the main boom length. Summary of the Invention

[0003] This invention provides a boom system, lifting equipment, and control method for lifting equipment, solving the technical problem of the lack of a lifting equipment that can be easily lifted and effectively increase the boom length of the main boom in the prior art.

[0004] In a first aspect, the present invention provides a boom system for lifting equipment, the lifting equipment including a slewing assembly and a main luffing mast rotatably disposed on the slewing assembly, the boom system comprising: Slewing assembly: The main boom includes a first truss boom, a telescopic boom structure, and a second truss boom; wherein the first truss boom, the telescopic boom structure, and the second truss boom are sequentially and detachably connected, and the end of the first truss boom facing away from the telescopic boom structure is rotatably mounted on the slewing assembly; The first pull plate is connected at one end to the top of the main luffing mast and at the other end to the telescopic boom structure; The luffing device is used to drive the main luffing mast to rotate along a first preset trajectory and sequentially change the positions of the main luffing mast and the main boom.

[0005] According to the present invention, a boom system for lifting equipment has at least the following advantages: By connecting the first truss arm to the end of the telescopic boom structure opposite to the second truss arm, and rotatably mounting the first truss arm onto the slewing assembly, compared to directly mounting the telescopic boom structure onto the slewing assembly, this increases the distance between the connection point of the first tie plate and the telescopic boom structure and the slewing axis of the first truss arm, thus increasing the lever arm. Therefore, only a relatively small pulling force is required from the first tie plate to smoothly raise the main boom of the same boom length. This allows for raising a main boom with a longer boom without increasing the output power of the luffing device, effectively increasing the boom length and ensuring stable raising. Furthermore, the first truss arm, the telescopic boom structure, and the second truss arm can be detachably connected sequentially. This allows the first truss arm, the telescopic boom structure, and the second truss arm to be separated into three independent components for easy transport; and they can also be assembled into a single main boom at the site for use.

[0006] In one optional embodiment, the telescopic arm structure has a first end and a second end disposed opposite to each other, the first end of the telescopic arm structure being pin-connected to one end of the first truss arm, and the second end of the telescopic arm structure being pin-connected to one end of the second truss arm.

[0007] Beneficial effects: By independently connecting the first end and the second end to the first truss arm and the second truss arm respectively with pins, the function of disassembling and transporting and assembling them into a whole on site is realized.

[0008] In one optional embodiment, the telescopic arm structure includes an outer cylinder and a telescopic body. The first end is disposed on the outer cylinder, and the first pull plate is connected to the outer cylinder. The second end is disposed on the telescopic body. A cavity is provided inside the outer cylinder, and a portion of the telescopic body is located inside the cavity. A telescopic cylinder is provided inside the outer cylinder, and the telescopic cylinder is used to drive the telescopic body to switch between an unfolded state and a folded state.

[0009] Beneficial effects: By connecting the first pull plate to the outer cylinder, the position of the connection between the first pull plate and the outer cylinder remains unchanged during the switching between the extended and folded states of the telescopic body. This makes the drive of the luffing device and the drive of the telescopic cylinder two independent motion modes, with no coupling between them. This facilitates both controlling the extension or folding of the telescopic body and controlling the main boom to rise away from the ground or descend closer to the ground.

[0010] In one alternative implementation, the first pull plate is connected to one end of the telescopic arm structure near the second truss arm.

[0011] Beneficial effects: By placing the connection between the first tension plate and the telescopic boom structure at the end of the telescopic boom structure relatively close to the second truss arm, the distance between the connection between the first tension plate and the telescopic boom structure and the rotation axis of the first truss arm can be increased without increasing the length of the first truss arm and the telescopic boom structure, thus increasing the lever arm. Therefore, without increasing the output power of the luffing device and achieving stable lifting, a second truss arm with a larger length can be assembled onto the telescopic boom structure.

[0012] In a second aspect, the present invention also provides a lifting device, including a slewing assembly, a main luffing mast, and the boom system provided in the first aspect; wherein the main luffing mast is rotatably mounted on the slewing assembly.

[0013] Since lifting equipment includes a boom system, which has the same beneficial effects as a boom system, it will not be elaborated here.

[0014] Thirdly, the present invention also provides a control method applied to the lifting equipment provided in the second aspect above, the control method comprising a process of controlling the boom system to raise the boom, the process of controlling the boom system to raise the boom comprising: Control the telescopic boom structure to retract, shortening the overall length of the main boom; The control luffing device drives the main luffing mast to rotate along a first set trajectory in a preset direction, and pulls the first pull plate, causing the main boom to rise away from the ground under the pulling force of the first pull plate.

[0015] According to a control method of the present invention, at least the following beneficial effects are achieved: Before the boom system is raised, the length of the main boom is shortened. This way, when the luffing device drives the main luffing mast to rotate in a preset direction along a first set trajectory, causing the main boom to rise away from the ground, the telescopic boom structure is always in a retracted state. This ensures that the main boom is always kept at a shorter length, so that the luffing device can smoothly raise the main boom with a smaller output power.

[0016] In one optional embodiment, the main boom is provided with a tensioning structure, the tensioning structure including a tensioning rope, one end of the tensioning rope being connected to one of the outer cylinder and the second truss boom, and the other end of the tensioning rope being connected to the other of the outer cylinder and the second truss boom via a winch; While controlling the telescopic boom structure to retract, the winch is also controlled to rotate and wind up the tension rope.

[0017] Beneficial effects: By adding a tensioning structure to the main boom, the structural strength of the main boom in the extended state and with its overall length extended is improved; and while controlling the retraction of the telescopic boom structure, the tensioning rope is also controlled to be wound up, thus keeping the tensioning rope in a taut state. On the one hand, this prevents the tensioning rope from collapsing and interfering with the retraction action of the telescopic boom structure, and on the other hand, it further connects the outer cylinder and the second truss arm, thereby ensuring the stability of raising the main boom.

[0018] In one alternative implementation, after the boom system has completed raising the boom, the control method is as follows: The telescopic boom structure is extended while the winch is rotated to unwind the tension rope, thereby extending the overall length of the main boom.

[0019] Beneficial effects: Considering that the distance between the second truss arm and the outer cylinder will increase when the telescopic boom structure is extended, the winch is controlled to unwind the tension rope while the telescopic boom structure is extended. This adapts to the movement of the second truss arm away from the outer cylinder, ensuring smooth extension of the main boom and keeping the tension rope taut and preventing it from breaking.

[0020] In one optional implementation, the control method further includes a process for controlling the boom system to lower the boom, the process of controlling the boom system to lower the boom including: The luffing device is controlled to drive the main luffing mast to rotate along a first preset trajectory in a direction opposite to the preset direction, so that the main boom descends towards the ground under its own weight.

[0021] Beneficial effects: By driving the main luffing mast to reciprocate along the same first set trajectory, the boom raising and lowering of the boom system can be achieved, making the movement trajectory more controllable and the control process simpler.

[0022] In an optional implementation, before controlling the luffing device to drive the main luffing mast to rotate along a first predetermined trajectory in a direction opposite to a preset direction, the process of controlling the boom system to lower the boom further includes: The telescopic boom structure is retracted while the winch is rotated to wind up the tension rope, thereby shortening the overall length of the main boom.

[0023] Beneficial effects: By shortening the main boom length before lowering it towards the ground, the telescopic boom structure remains retracted throughout the process of lowering the main boom towards the ground, as the luffing device drives the main luffing mast to rotate along a first predetermined trajectory in the opposite direction to the preset direction. This ensures the main boom maintains a shorter length, allowing the luffing device to smoothly lower the boom system with less output power. Furthermore, controlling the retraction of the telescopic boom structure simultaneously with the winding of the tension rope keeps it taut. This prevents the tension rope from collapsing and interfering with the retraction of the telescopic boom structure, and further connects the outer cylinder and the second truss boom, thus ensuring the smoothness of lowering the main boom towards the ground. Attached Figure Description

[0024] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0025] Figure 1 This is a structural schematic diagram of a lifting device equipped with a boom system according to an embodiment of the present invention, wherein the main boom rises in the direction away from the ground, increasing the angle between the main boom and the ground to the working angle. Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 1 Enlarged view of point B in the middle; Figure 4 This is a structural schematic diagram of a lifting device equipped with a boom system according to an embodiment of the present invention, wherein the main boom descends towards the ground, reducing the angle between the main boom and the ground to the transport angle. Figure 5 This is a schematic diagram of the main boom in the boom system of an embodiment of the present invention, wherein the telescopic body is in a folded state; Figure 6 for Figure 5 A schematic diagram of the structure of the first truss arm; Figure 7 for Figure 5 A schematic diagram of the telescopic arm structure in the diagram; Figure 8 for Figure 5 A schematic diagram of the result of the second truss arm; Figure 9This is a schematic diagram of the main boom in the boom system of an embodiment of the present invention, wherein the telescopic body is in the deployed state; Figure 10 This is a structural schematic diagram of a lifting device adapted to a super-lift counterweight working condition according to an embodiment of the present invention, wherein the angle between the main boom and the ground is increased to the working angle; Figure 11 This is a structural schematic diagram of a lifting device adapted to a super-lift counterweight working condition according to an embodiment of the present invention, wherein the angle between the main boom and the ground is reduced to the transport angle.

[0026] Explanation of reference numerals in the attached figures: 100 - Slewing assembly, 110 - Linkage structure, 111 - Seventh pulley block, 112 - First wire rope; 200-Main boom, 210-First truss boom, 211-Third end, 2111-Second hinge hole, 212-Fourth end, 213-First connecting part, 214-First combined boom, 2141-First set combined boom, 2142-First standard combined boom, 215-Fourth pin, 216-Fifth pin, 217-Sixth hinge hole, 220-Telescopic boom structure, 221-First end, 2211-First hinge hole, 222-Second end, 2221-Third hinge hole, 223-Outer cylinder, 2231-Connecting lug 224-Telescopic main body, 2241-Section arm, 225-Transition section, 226-Third connecting structure, 2261-Third pin, 230-Second truss arm, 231-Fifth end, 2311-Fourth hinge hole, 232-Sixth end, 233-Second connecting part, 234-Second combined arm, 2341-Second set combined arm, 2342-Second standard combined arm, 235-Sixth pin, 236-Seventh pin, 240-Connecting pin, 250-Tension structure, 251-Tension rope, 252-Second tension plate; 300-Main Lamp Mast; 400 - First pull plate; 500 - luffing device, 510 - luffing winch, 520 - first pulley block, 530 - second pulley block, 540 - wire rope; 600 - First connecting structure; 610 - First pin; 700 - Second connecting structure, 710 - Second pin; 810-Hook, 820-Third pulley block, 830-Lifting mast, 840-Fourth pulley block, 850-Fifth pulley block, 860-Sixth pulley block, 870-Lifting winch, 880-Sling; 900-Counterweight Components; 1000-Chassis; 1100-Superlift Counterweight; 1200 - Luffing boom, 1210 - Eighth pulley block, 1220 - Ninth pulley block, 1230 - Tenth pulley block, 1240 - Second wire rope; 1300 - Anti-tilt telescopic bar. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of 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 some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this embodiment, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "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 embodiment 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 limitations on this embodiment. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this embodiment, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment according to the specific circumstances.

[0030] The following is combined Figures 1 to 11 The following describes embodiments of the present invention.

[0031] According to embodiments of the present invention, in one aspect, a boom system for lifting equipment is provided. For example... Figure 1 and Figure 4 As shown, the lifting equipment includes a slewing assembly 100, a chassis 1000, and a main luffing mast 300 rotatably mounted on the slewing assembly 100. The chassis 1000 supports the slewing assembly 100, providing a stable foundation for it. The slewing assembly 100 can rotate relative to the chassis 1000, allowing the boom system to slew together with the slewing assembly 100 within a certain range.

[0032] Furthermore, the boom system includes a main boom 200, a first tie plate 400, and a luffing device 500. The main boom 200 includes a first truss boom 210, a telescopic boom structure 220, and a second truss boom 230. Wherein, as Figure 1 , Figure 4 and Figure 7 As shown, the first truss arm 210, the telescopic arm structure 220, and the second truss arm 230 are sequentially and detachably connected. The end of the first truss arm 210 facing away from the telescopic arm structure 220 is rotatably mounted on the slewing assembly 100. Figure 1 and Figure 4 As shown, one end of the first pull plate 400 is connected to the top of the main luffing mast 300, and the other end is connected to the telescopic boom structure 220. The luffing device 500 is used to drive the main luffing mast 300 to rotate along a first preset trajectory, thereby changing the positions of the main luffing mast 300 and the main boom 200 in sequence. Specifically, the luffing device 500 drives the main luffing mast 300 in a preset direction (i.e., Figure 4 During the rotation along the first set trajectory (in the direction indicated by the middle arrow), the first pull plate 400 is pulled, causing the main boom 200 to rise in the direction away from the ground under the pulling force of the first pull plate 400, thus achieving the lifting.

[0033] Using the technical solution of this embodiment, in the above structure, the end of the telescopic boom structure 220 facing away from the second truss arm 230 is connected to the first truss arm 210, and the first truss arm 210 is rotatably mounted on the slewing assembly 100. Compared with the method of directly rotatably mounting the telescopic boom structure 220 on the slewing assembly 100, this embodiment can increase the distance between the connection point of the first pull plate 400 and the telescopic boom structure 220 and the rotation axis of the first truss arm 210, thereby increasing the lever arm. In this way, only a relatively small pulling force needs to be applied by the first pull plate 400 to smoothly lift the main boom 200 of the same boom length, and it is possible to lift the main boom 200 with a larger boom length without increasing the output power of the luffing device 500, thereby achieving the function of effectively increasing the boom length of the main boom 200 and lifting it stably. In particular, it can break the lifting length of the main boom 200 applicable to standard wind power conditions, and is more advantageous for wind power maintenance in mountainous environments.

[0034] It should be noted that the first truss arm 210, the telescopic boom structure 220, and the second truss arm 230 are sequentially and detachably connected in the direction away from the slewing assembly 100. This allows the first truss arm 210, the telescopic boom structure 220, and the second truss arm 230 to be separated into three independent components, so that the main boom 200, which has a relatively large overall length, can be disassembled and transported separately. It can also be transported to the site and then assembled into the main boom 200 for use as a whole.

[0035] It should be noted that the lifting equipment equipped with the boom system of this embodiment is used to assist in wind power maintenance. For example, in steep mountainous environments, due to terrain limitations, it is necessary to install a crane at a lower altitude with more space, and then hoist wind turbine components at a higher altitude for assembly or maintenance. Because this embodiment can promote the development of a larger main boom length of 200mm while ensuring stable lifting, it is more advantageous for wind power maintenance in the aforementioned special mountainous environments.

[0036] In some further embodiments, the lifting equipment equipped with the boom system of this embodiment can be applied to other lifting scenarios as needed.

[0037] like Figures 5 to 7 As shown, in some embodiments, the telescopic boom structure 220 has a first end 221 and a second end 222 disposed opposite to each other. The first truss arm 210 has a third end 211 and a fourth end 212 disposed opposite to each other. The second truss arm 230 has a fifth end 231 and a sixth end 232 disposed opposite to each other. Further, the first end 221 of the telescopic boom structure 220 is pin-connected to the third end 211 of the first truss arm 210 via a first connecting structure 600, and the second end 222 of the telescopic boom structure 220 is pin-connected to the fifth end 231 of the second truss arm 230 via a second connecting structure 700. The fourth end 212 of the first truss arm 210 is rotatably disposed on the slewing assembly 100.

[0038] In the above structure, the first end 221 and the second end 222 of the telescopic boom structure 220 are independently pin-connected to the first truss arm 210 and the second truss arm 230, respectively, realizing the functions of disassembly and transportation as well as on-site assembly into a whole for use.

[0039] Based on the above embodiments, as a further defined implementation, such as... Figures 5 to 7 As shown, the first connecting structure 600 includes two first pins 610. Two first hinge holes 2211 are provided on the first end 221. A second hinge hole 2111 is provided on the third end 211, with the second hinge hole 2111 corresponding to the first hinge hole 2211. The first pins 610 pass through the first hinge holes 2211 and the second hinge holes 2111.

[0040] In the above structure, when assembling the telescopic boom structure 220 with the first truss arm 210, firstly, one of the first hinge holes 2211 is aligned with the corresponding second hinge hole 2111, and a first pin 610 is passed through the first hinge hole 2211 and the second hinge hole 2111, so that one side of the telescopic boom structure 220 and the first truss arm 210 are hinged together. Then, using the first pin 610 as the rotation center, the telescopic boom structure 220 is rotated until the other first hinge hole 2211 is aligned with the corresponding second hinge hole 2111, and another first pin 610 is passed through the first hinge hole 2211 and the second hinge hole 2111, so that the other side of the telescopic boom structure 220 and the first truss arm 210 are hinged together, completing the assembly operation of the telescopic boom structure 220 and the first truss arm 210. Compared to horizontally lifting the telescopic boom structure 220 and then assembling it with the first truss arm 210, the above assembly process is much simpler.

[0041] In some more embodiments, the first hinge hole 2211 can be set to a greater number as needed.

[0042] Based on the above embodiments, as a further defined implementation, such as... Figure 5 , Figure 7 and Figure 8 As shown, the second connecting structure 700 includes two second pins 710. Two third hinge holes 2221 are provided on the second end 222. A fourth hinge hole 2311 is provided on the fifth end 231, with the fourth hinge hole 2311 corresponding to the third hinge hole 2221. The second pins 710 pass through the third hinge hole 2221 and the fourth hinge hole 2311.

[0043] In the above structure, when assembling the telescopic boom structure 220 and the second truss arm 230, firstly, one of the third hinge holes 2221 is aligned with the corresponding fourth hinge hole 2311, and the second pin 710 is passed through the third hinge hole 2221 and the fourth hinge hole 2311, so that one side of the telescopic boom structure 220 and the second truss arm 230 is hinged together. Then, with the second pin 710 as the rotation center, the second truss arm 230 is rotated until the other third hinge hole 2221 is aligned with the corresponding fourth hinge hole 2311, and the other second pin 710 is passed through the third hinge hole 2221 and the fourth hinge hole 2311, so that the other side of the telescopic boom structure 220 and the second truss arm 230 is hinged together, completing the assembly operation of the telescopic boom structure 220 and the second truss arm 230. Compared to horizontally lifting the second truss arm 230 and then assembling it with the telescopic boom structure 220, the above assembly process is simpler to operate.

[0044] In some more embodiments, the third hinge hole 2221 can be set to a greater number as needed.

[0045] To facilitate the disassembly and transportation of hybrid boom cranes to the site of use. For example... Figure 2 and Figure 6 As shown, in some embodiments, the slewing assembly 100 is provided with a fifth hinge hole. The first truss arm 210 is provided with a sixth hinge hole 217. The sixth hinge hole 217 is correspondingly provided with the fifth hinge hole and allows the connecting pin 240 to pass through. In the above structure, when assembling the slewing assembly 100 and the first truss arm 210, the fifth hinge hole and the sixth hinge hole 217 are first aligned, and the connecting pin 240 is passed through the fifth hinge hole and the sixth hinge hole 217, so that the first truss arm 210 and the slewing assembly 100 are detachably hinged together. This achieves both detachable connection and relative rotation functions.

[0046] In some embodiments, such as Figure 4 , Figure 5 , Figure 7 and Figure 9 As shown, the telescopic arm structure 220 includes an outer cylinder 223 and a telescopic body 224. A first end 221 is disposed on the outer cylinder 223, and a first pull plate 400 is connected to the outer cylinder 223. A second end 222 is disposed on the telescopic body 224. A cavity is provided inside the outer cylinder 223, and a portion of the telescopic body 224 is located within the cavity. A telescopic cylinder is disposed inside the outer cylinder 223, and the telescopic cylinder is used to drive the telescopic body 224 to switch between an extended state and a folded state.

[0047] In the above structure, the first pull plate 400 is connected to the outer cylinder 223, thus ensuring that the position of the connection between the first pull plate 400 and the outer cylinder 223 does not change during the switching between the extended and folded states of the telescopic body 224. Therefore, the driving of the luffing device 500 and the driving of the telescopic cylinder are two independent motion modes, with no coupling between them. This facilitates both the control of the extension or folding of the telescopic body 224 and the control of the main boom 200 rising away from the ground or descending closer to the ground.

[0048] It is understandable that, such as Figure 4 As shown, during the process of the luffing device 500 driving the main luffing mast 300 to rotate in a preset direction along a first preset trajectory, causing the main boom 200 to rise in the direction away from the ground to achieve the lifting, the telescopic body 224 is in a folded state. This shortens the overall length of the main boom 200 so that the main boom 200 can be lifted smoothly.

[0049] Based on the above embodiments, as a further defined implementation, such as... Figure 7 and Figure 9As shown, the telescopic body 224 includes multiple fitted arms 2241, preferably five arms 2241, with a second end 222 provided on the arm 2241 that is furthest from the outer cylinder 223.

[0050] In some embodiments, the first pull plate 400 is connected to the end of the telescopic boom structure 220 near the second truss arm 230. Connecting the first pull plate 400 to the end of the telescopic boom structure 220 relatively close to the second truss arm 230 increases the distance between the connection point of the first pull plate 400 and the telescopic boom structure 220 and the rotation axis of the first truss arm 210 without increasing the length of the first truss arm 210 and the telescopic boom structure 220, thus increasing the lever arm. Therefore, without increasing the output power of the luffing device 500 and achieving stable lifting, a second truss arm 230 with a larger length can be assembled onto the telescopic boom structure 220.

[0051] Based on the above embodiments, as a further defined implementation, such as... Figure 1 , Figure 4 and Figure 7 As shown, the outer surface of the outer cylinder 223 is provided with a connecting lug 2231, which is located at one end of the outer cylinder 223 relatively close to the second truss arm 230; the connecting lug 2231 is connected to the first pull plate 400. In the above structure, the connection between the first pull plate 400 and the outer cylinder 223 is located at one end of the outer cylinder 223 relatively close to the second truss arm 230. This allows for an increase in the distance between the connection between the first pull plate 400 and the telescopic arm structure 220 and the rotation axis of the first truss arm 210 without increasing the length of the first truss arm 210 and the outer cylinder 223, thus increasing the lever arm. Therefore, without increasing the output power of the luffing device 500 and ensuring stable lifting, the second truss arm 230, which has a larger length, can be assembled onto the telescopic arm structure 220.

[0052] Based on the above embodiments, as a further defined implementation, such as... Figure 5 and Figure 7 As shown, the cross-section of the first truss arm 210 is larger than that of the outer cylinder 223. The telescopic boom structure 220 also includes a transition section 225 connecting the first truss arm 210 and the outer cylinder 223, the external dimensions of which gradually decrease towards the outer cylinder 223. This allows for a further reduction in the overall weight of the main boom 200 while ensuring its structural strength.

[0053] Furthermore, the first end 221 is disposed on the transition section 225.

[0054] Based on the above embodiments, as a further limiting implementation, such as Figure 7As shown, the transition section 225 is detachably fixed to the outer cylinder 223 via the third connecting structure 226, so that the transition section 225 can be separated from the outer cylinder 223 for transportation.

[0055] Based on the above embodiments, as a further limiting implementation, such as Figure 7 As shown, the third connecting structure 226 includes two third pins 2261. The transition section 225 has two seventh hinge holes. The outer cylinder 223 has an eighth hinge hole, which corresponds one-to-one with the seventh hinge holes. The third pins 2261 pass through both the seventh and eighth hinge holes.

[0056] In the above structure, when assembling the transition section 225 with the outer cylinder 223, firstly, one of the seventh hinge holes is aligned with the corresponding eighth hinge hole, and a third pin 2261 is passed through the seventh and eighth hinge holes, hinged to one side of the outer cylinder 223. Then, using the third pin 2261 as the rotation center, the transition section 225 is rotated until the other seventh hinge hole aligns with the corresponding eighth hinge hole, and another third pin 2261 is passed through the seventh and eighth hinge holes, hinged to the other side of the outer cylinder 223, completing the assembly of the transition section 225 with the outer cylinder 223. The entire assembly process described above is simpler to operate.

[0057] In some more embodiments, the number of seventh hinge holes can be increased as needed.

[0058] In some embodiments, the first truss arm 210 is a telescopic structure. For example... Figure 5 and Figure 6As shown, the first truss arm 210 further includes a first connecting portion 213 and a plurality of first combined arms 214 sequentially and detachably connected along the direction close to the telescopic arm structure 220. The plurality of first combined arms 214 are disposed between the first connecting portion 213 and the telescopic arm structure 220. The first connecting portion 213 is rotatably mounted on the slewing assembly 100. Two adjacent first combined arms 214 are detachably connected as one unit by at least two fourth pins 215. The first combined arm 214 relatively close to the first connecting portion 213 is configured as a first predetermined combined arm 2141, and the first combined arm 214 relatively close to the telescopic arm structure 220 is configured as a first standard combined arm 2142. The first predetermined combined arm 2141 is detachably fixedly connected to the first connecting portion 213 by at least two fifth pins 216. The first standard combined arm 2142 is detachably fixedly connected to the telescopic arm structure 220 by a first connecting structure 600. In the above structure, a set number of first combined booms 214 can be flexibly selected and assembled between the first connecting part 213 and the telescopic boom structure 220 according to the actual working conditions, thereby forming first truss booms 210 of different lengths. In this way, while ensuring stable lifting, it is possible to assemble main booms 200 of different lengths on site according to the actual working conditions, so as to meet different usage requirements.

[0059] In some embodiments, the second truss arm 230 is a telescopic structure. Further, as... Figure 5 and Figure 8 As shown, the second truss arm 230 includes a second connecting portion 233 and a plurality of second combined arms 234 sequentially and detachably connected. The plurality of second combined arms 234 are disposed between the telescopic arm structure 220 and the second connecting portion 233. Adjacent second combined arms 234 are detachably connected as a single unit via at least two sixth pins 235. The second combined arm 234 relatively closer to the second connecting portion 233 is configured as a second predetermined combined arm 2341, and the second combined arm 234 relatively closer to the telescopic arm structure 220 is configured as a second standard combined arm 2342. The second predetermined combined arm 2341 is detachably fixedly connected to the second connecting portion 233 via at least two seventh pins 236. The second standard combined arm 2342 is detachably fixedly connected to the telescopic arm structure 220 via a second connecting structure 700. In the above structure, a set number of second combined arms 234 can be flexibly selected and assembled between the second connecting portion 233 and the telescopic arm structure 220 according to the actual operating conditions, thereby forming second truss arms 230 of different lengths. In this way, while ensuring stable lifting, the main boom 200 of different lengths can be assembled on-site according to the actual working conditions to meet different usage requirements.

[0060] In practical applications, when the length of the main boom 200 is set to be relatively long; such as Figure 10 and Figure 11As shown, a super-lift counterweight 1100 is installed at the rear of the slewing assembly 100. The tail of the slewing assembly 100 is connected to a seventh pulley block 111 via a connecting rod structure 110, and the seventh pulley block 111 is mounted on the super-lift counterweight 1100. A luffing boom 1200 is also rotatably mounted on the slewing assembly 100, and an eighth pulley block 1210 is mounted on the top of the luffing boom 1200. The seventh pulley block 111 is connected to the eighth pulley block 1210 via a first steel wire rope 112. A ninth pulley block 1220 is provided on one side of the top of the luffing boom 1200, a tenth pulley block 1230 is provided on the side of the first pull plate 400 opposite to the telescopic boom structure 220, and a second pulley block 530 is provided on the top of the main luffing mast 300; the luffing device 500 includes a luffing winch 510 and a second wire rope 1240, the other end of which passes sequentially around the second pulley block 530, the eighth pulley block 1210, the ninth pulley block 1220, and the tenth pulley block 1230 before connecting to the ninth pulley block 1220. The above structure meets the requirements of superlift counterweight operation.

[0061] like Figure 1 , Figure 2 and Figure 4As shown, in some embodiments, the luffing device 500 includes a luffing winch 510, a first pulley block 520, a second pulley block 530, and a wire rope 540. The luffing winch 510 is disposed on the slewing assembly 100. The first pulley block 520 is disposed on the slewing assembly 100 and is located on the side of the luffing winch 510 opposite to the main luffing mast 300. The second pulley block 530 is disposed on the top of the main luffing mast 300. One end of the wire rope 540 is connected to the luffing winch 510, and the other end of the wire rope 540 passes sequentially around the second pulley block 530 and the first pulley block 520 before being connected to the second pulley block 530. In the above structure, the wire rope 540 first passes sequentially around the second pulley block 530 and the first pulley block 520 before being connected to the second pulley block 530. When the luffing winch 510 rotates and tightens the wire rope 540, the wire rope 540 can drive the main luffing mast 300 to rotate along the first set trajectory in a direction away from the main boom 200, so that the distance between the first pulley block 520 and the second pulley block 530 is shortened. This causes the first pull plate 400 to apply tension to the main boom 200 and drive the main boom 200 to rise in a direction away from the ground, so that the angle between the main boom 200 and the ground increases to the working angle. When the luffing winch 510 rotates and the wire rope 540 is unloaded, the wire rope 540 wound around the first pulley block 520 and the second pulley block 530 drives the distance between the first pulley block 520 and the second pulley block 530 to increase. At this time, since the position of the first pulley block 520 remains unchanged, the main boom 200 descends towards the ground under its own weight, reducing the angle between the main boom 200 and the ground to the transport angle. At the same time, the first pull plate 400 drives the main luffing mast 300 to rotate along the first set trajectory in a direction opposite to the preset direction.

[0062] It should be noted that in this embodiment, a luffing winch 510 is used instead of a luffing hydraulic cylinder, which can drive the longer main boom 200 to rise smoothly in the direction away from the ground or descend in the direction closer to the ground.

[0063] According to an embodiment of the present invention, in another aspect, a lifting device is also provided. The lifting device includes a slewing assembly 100, a chassis 1000, a main luffing mast 300, and the aforementioned boom system. The main luffing mast 300 is rotatably mounted on the slewing assembly 100. The chassis 1000 supports the slewing assembly 100, providing a stable foundation for the slewing assembly 100. The slewing assembly 100 is rotatable relative to the chassis 1000, allowing the boom system to slew together with the slewing assembly 100 within a certain range.

[0064] Furthermore, the main boom 200 includes a first truss boom 210, a telescopic boom structure 220, and a second truss boom 230. Among them, as shown... Figure 1 , Figure 4 and Figure 7As shown, the first truss arm 210, the telescopic arm structure 220, and the second truss arm 230 are sequentially and detachably connected. The end of the first truss arm 210 facing away from the telescopic arm structure 220 is rotatably mounted on the slewing assembly 100. Figure 1 and Figure 4 As shown, one end of the first pull plate 400 is connected to the top of the main luffing mast 300, and the other end is connected to the telescopic boom structure 220. The luffing device 500 is used to drive the main luffing mast 300 in a preset direction (i.e., Figure 4 The main boom 200 rotates along the first predetermined trajectory (in the direction indicated by the middle arrow), sequentially changing the positions of the main boom mast 300 and the main boom 200. Specifically, as the luffing device 500 drives the main boom mast 300 to rotate along the first predetermined trajectory, it pulls the first pull plate 400, causing the main boom 200 to rise in the direction away from the ground under the pulling force of the first pull plate 400, thus achieving boom lifting.

[0065] Using the technical solution of this embodiment, in the above structure, the end of the telescopic boom structure 220 opposite to the second truss arm 230 is connected to the first truss arm 210, and the first truss arm 210 is rotatably mounted on the slewing assembly 100. Compared with the method of directly rotatably mounting the telescopic boom structure 220 on the slewing assembly 100, this embodiment can increase the distance between the connection point of the first pull plate 400 and the telescopic boom structure 220 and the rotation axis of the first truss arm 210, thereby increasing the lever arm. In this way, only a relatively small pulling force needs to be applied by the first pull plate 400 to smoothly lift the main boom 200 of the same arm length, and it is possible to lift the main boom 200 with a larger arm length without increasing the output power of the luffing device 500, thereby achieving the function of effectively increasing the arm length of the main boom 200 and lifting it stably. Furthermore, the first truss arm 210, the telescopic boom structure 220, and the second truss arm 230 are sequentially and detachably connected in the direction away from the slewing assembly 100. This allows the first truss arm 210, the telescopic boom structure 220, and the second truss arm 230 to be separated into three independent components, so that the main boom 200, which has a larger overall length, can be disassembled and transported separately. It can also be transported to the site and then assembled into the main boom 200 for use as a whole.

[0066] like Figures 1 to 3As shown, in some embodiments, the lifting equipment further includes a hook 810, on which a third pulley block 820 is provided. A fifth pulley block 850 is provided on the side of the second truss arm 230, and a fourth pulley block 840 and a sixth pulley block 860 are provided at the sixth end 232 of the second truss arm 230. A hoisting winch 870 is provided on the slewing assembly 100. A sling 880 is provided on the hoisting winch 870, and the other end of the sling 880 passes sequentially around the fifth pulley block 850, the fourth pulley block 840, the sixth pulley block 860, and the third pulley block 820 before connecting to the sixth pulley block 860. In the above structure, when the hoisting winch 870 rotates and tightens the sling 880, the sling 880 can shorten the distance between the third pulley block 820 and the sixth pulley block 860, thereby driving the hook 810 to rise. When the hoist 870 rotates and the sling 880 is loosened, the sling 880 can increase the distance between the third pulley block 820 and the sixth pulley block 860, thus driving the hook 810 to descend and realizing the lifting and transfer function of the object.

[0067] In practical applications, in order to enable the hook 810 to smoothly lift heavier objects, the hoist 870 is equipped with two.

[0068] In some embodiments, a lifting mast 830 is provided on the connecting lug 2231, and a tensioning structure 250 is provided on the main boom 200. The tensioning structure 250 includes a tension rope 251, one end of which is connected to the outer cylinder 223, and the other end is connected to the second truss boom 230 via a winch. By adding a tensioning structure 250 to the main boom 200, the structural strength of the main boom 200 in its extended state and with its overall length extended is improved. Furthermore, the tension rope 251 is wound up while the telescopic boom structure 220 is being controlled to retract, thus keeping the tension rope 251 taut. This prevents the tension rope 251 from collapsing and interfering with the retraction of the telescopic boom structure 220, and further connects the outer cylinder 223 and the second truss boom 230, thereby ensuring the stability of lifting the main boom 200.

[0069] In one embodiment not shown, one end of the tension rope 251 is connected to the second truss arm 230, and the other end is connected to the outer cylinder 223 via a winch.

[0070] Based on the above embodiments, in a further defined implementation, the tensioned structure 250 also includes a second tie plate 252. One end of the second tie plate 252 is connected to the third end 211 of the first truss arm 210, and the other end is connected to the lifting mast 830. By further connecting the outer cylinder 223 and the first truss arm 210 through the second tie plate 252, the structural strength of the main boom 200 in the extended state and with its overall length extended can be improved, so as to lift heavier objects, and the stability of lifting the main boom 200 can be ensured.

[0071] Specifically, the second pull plate 252 and the tension rope 251 are arranged in a "V" shape.

[0072] like Figure 1 , Figure 2 and Figure 4 As shown, in some embodiments, the lifting equipment further includes a counterweight assembly 900 disposed on the slewing assembly 100, the counterweight assembly 900 being located on the side of the luffing winch 510 opposite to the main luffing mast 300. In the above structure, the counterweight assembly 900 located at the rear of the slewing assembly 100 can balance the overturning moment generated by the crane's load, ensuring the stability of the entire machine.

[0073] like Figure 1 and Figure 2 As shown, in some embodiments, the hybrid boom crane also includes an anti-tilt telescopic bar 1300, which is connected between the side of the first truss boom 210 and the slewing assembly 100. The anti-tilt telescopic bar 1300 supports the main boom 200 and prevents the main boom 200 from tipping over when lifting heavy objects.

[0074] like Figures 1 to 5 As shown, according to an embodiment of the present invention, in another aspect, a control method is also provided, applied to the above-described lifting equipment. The control method includes a process of controlling the boom system to raise the boom, the process of controlling the boom system to raise the boom including: like Figure 4 and Figure 5 As shown, the telescopic boom structure 220 is retracted to shorten the overall length of the main boom 200; The control unit 500 drives the main luffing mast 300 in a preset direction (i.e., Figure 4 The main boom 200 rotates along the first set trajectory (in the direction indicated by the middle arrow) and pulls the first pull plate 400, causing the main boom 200 to rise away from the ground under the pulling force of the first pull plate 400.

[0075] Using the technical solution of this embodiment, in the above method, the length of the main boom 200 is shortened before the boom is raised, so that the luffing device 500 can drive the main luffing mast 300 to... Figure 4 The main boom 200 rotates along the first set trajectory in the direction indicated by the middle arrow, causing the main boom 200 to rise in the direction away from the ground. During the boom raising process, the telescopic boom structure 220 is always in a retracted state to ensure that the main boom 200 always maintains a short length so that the luffing device 500 can smoothly raise the main boom 200 with a small output power.

[0076] In some embodiments, while controlling the telescopic boom structure 220 to retract, the winch is controlled to rotate and wind up the tension rope 251.

[0077] In the above method, while controlling the retraction of the telescopic boom structure 220, the tension rope 251 is also wound up. This keeps the tension rope 251 in a taut state, which on the one hand prevents the tension rope 251 from collapsing and interfering with the retraction action of the telescopic boom structure 220, and on the other hand further connects the outer cylinder 223 and the second truss arm 230, thereby ensuring the stability of lifting the main boom 200.

[0078] In some embodiments, after the boom system has completed raising the boom, the control method is as follows: The telescopic boom structure 220 is extended while the winch is rotated to unwind the tension rope 251, thereby extending the overall length of the main boom frame 200.

[0079] Considering that extending the telescopic boom structure 220 will increase the distance between the second truss arm 230 and the outer cylinder 223, the above method controls the winch to unwind the tension rope 251 while controlling the extension of the telescopic boom structure 220. This ensures that the tension rope 251 adapts to the movement of the second truss arm 230 away from the outer cylinder 223, which can ensure smooth extension of the main boom 200 and keep the tension rope 251 taut and not easily break.

[0080] In some embodiments, the control method further includes a process of controlling the boom system to lower the boom, the process of controlling the boom system to lower the boom including: The luffing device 500 controls the main luffing mast 300 to drive in a direction opposite to a preset direction (i.e., with...). Figure 4 The main boom 200 rotates along the first set trajectory (in the opposite direction to the direction indicated by the middle arrow), causing the main boom 200 to descend towards the ground under its own weight.

[0081] The above method achieves boom raising and lowering of the boom system by driving the main luffing mast 300 to reciprocate along the same first set trajectory, making the motion trajectory more controllable and the control process simpler.

[0082] In some embodiments, before controlling the luffing device 500 to drive the main luffing mast 300 to rotate along a first predetermined trajectory in a direction opposite to a preset direction, the process of controlling the boom system to lower the boom further includes: The telescopic boom structure 220 is controlled to retract, and the winch is simultaneously controlled to rotate and wind up the tension rope 251, thereby shortening the overall length of the main boom 200.

[0083] By shortening the length of the main boom 200 before lowering it towards the ground, the telescopic boom structure 220 remains retracted throughout the process of lowering the main boom 200 towards the ground, as the luffing device 500 drives the main luffing mast 300 to rotate along a first predetermined trajectory in the opposite direction to the preset direction. This ensures the main boom 200 maintains a shorter length, allowing the luffing device 500 to smoothly lower the boom system with less output power. Furthermore, the tension rope 251 is wound up simultaneously with the retraction of the telescopic boom structure 220, keeping it taut. This prevents the tension rope 251 from collapsing and interfering with the retraction of the telescopic boom structure 220, and further connects the outer cylinder 223 and the second truss boom 230, thus ensuring the smoothness of lowering the main boom 200 towards the ground.

[0084] In some embodiments, the control method further includes an assembly process for the main boom 200, the assembly process for the main boom 200 including: like Figure 4 As shown, the first truss arm 210, the telescopic arm structure 220, and the second truss arm 230 are sequentially and detachably connected as a whole; at this time, the first truss arm 210 is rotatably mounted on the slewing assembly 100, and one end of the first pull plate 400 is connected to the top of the main luffing mast 300, and the other end is connected to the telescopic arm structure 220.

[0085] In some embodiments, the assembly process of the main boom 200 further includes: Select the set number of the first combination arms 214; A set number of first combined arms 214 and first connecting parts 213 are sequentially connected to form a first truss arm 210.

[0086] In the above method, a set number of first combined booms 214 can be flexibly selected and assembled between the first connecting part 213 and the telescopic boom structure 220 according to the actual working conditions, thereby forming first truss booms 210 of different lengths. In this way, while ensuring stable lifting, it is possible to assemble main booms 200 of different lengths on site according to the actual working conditions, so as to meet different usage requirements.

[0087] In some embodiments, the assembly process of the main boom 200 further includes: Select a set number of the second combination arms 234; A predetermined number of second combined arms 234 and second connecting parts 233 are sequentially connected to form a first truss arm 210 to form a second truss arm 230.

[0088] In the above method, a set number of second combined booms 234 can be flexibly selected and assembled between the second connecting part 233 and the telescopic boom structure 220 according to the actual working conditions, thereby forming second truss booms 230 of different lengths. In this way, while ensuring stable lifting, it is possible to assemble main booms 200 of different lengths on site according to the actual working conditions, so as to meet different usage requirements.

[0089] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the present invention.

Claims

1. A boom system for a lifting device, the lifting device comprising a slewing assembly (100) and a main luffing mast (300) rotatably disposed on the slewing assembly (100), characterized in that, The boom system includes: The main boom (200) includes a first truss boom (210), a telescopic boom structure (220), and a second truss boom (230); wherein the first truss boom (210), the telescopic boom structure (220), and the second truss boom (230) are sequentially and detachably connected, and the end of the first truss boom (210) facing away from the telescopic boom structure (220) is rotatably mounted on the slewing assembly (100). The first pull plate (400) is connected at one end to the top of the main luffing mast (300) and at the other end to the telescopic boom structure (220); The luffing device (500) is used to drive the main luffing mast (300) to rotate along a first set trajectory and sequentially change the positions of the main luffing mast (300) and the main boom (200).

2. The boom system according to claim 1, characterized in that, The telescopic arm structure (220) has a first end (221) and a second end (222) arranged opposite to each other. The first end (221) of the telescopic arm structure (220) is connected to one end of the first truss arm (210) by a pin, and the second end (222) of the telescopic arm structure (220) is connected to one end of the second truss arm (230) by a pin.

3. The boom system according to claim 2, characterized in that, The telescopic arm structure (220) includes an outer cylinder (223) and a telescopic body (224). The first end (221) is disposed on the outer cylinder (223), and the first pull plate (400) is connected to the outer cylinder (223). The second end (222) is disposed on the telescopic body (224). A cavity is provided inside the outer cylinder (223), and a part of the telescopic body (224) is located inside the cavity. A telescopic cylinder is provided inside the outer cylinder (223), and the telescopic cylinder is used to drive the telescopic body (224) to switch between an unfolded state and a folded state.

4. The boom system according to any one of claims 1 to 3, characterized in that, The first pull plate (400) is connected to one end of the telescopic arm structure (220) near the second truss arm (230).

5. A lifting device, characterized in that, It includes a slewing assembly (100), a main luffing mast (300), and a boom system as described in any one of claims 1 to 4; wherein the main luffing mast (300) is rotatably mounted on the slewing assembly (100).

6. A control method, characterized in that, Applied to the lifting equipment of claim 5, the control method includes a process of controlling the boom system to raise the boom, the process of controlling the boom system to raise the boom includes: The telescopic boom structure (220) is retracted to shorten the overall length of the main boom (200); The control luffing device (500) drives the main luffing mast (300) to rotate along the first set trajectory in a preset direction and pulls the first pull plate (400), so that the main boom (200) is raised away from the ground under the pulling force of the first pull plate (400).

7. The control method according to claim 6, characterized in that, The main boom (200) is provided with a tensioning structure (250), which includes a tensioning rope (251). One end of the tensioning rope (251) is connected to one of the outer cylinder (223) and the second truss boom (230), and the other end of the tensioning rope (251) is connected to the other of the outer cylinder (223) and the second truss boom (230) through a winch. While controlling the retraction of the telescopic boom structure (220), the winch is rotated to wind up the tension rope (251).

8. The control method according to claim 7, characterized in that, After the boom system completes boom raising, the control method is as follows: The telescopic boom structure (220) is extended while the winch is rotated to unwind the tension rope (251) to extend the overall length of the main boom (200).

9. The control method according to claim 8, characterized in that, The control method further includes a process for controlling the lowering of the boom system, the process of controlling the lowering of the boom system including: The luffing device (500) is controlled to drive the main luffing mast (300) to rotate along a first set trajectory in a direction opposite to the preset direction, so that the main boom (200) descends towards the ground under its own weight.

10. The control method according to claim 9, characterized in that, Before controlling the luffing device (500) to drive the main luffing mast (300) to rotate along a first predetermined trajectory in a direction opposite to the preset direction, the process of controlling the boom system to lower the boom further includes: The telescopic boom structure (220) is controlled to retract, and the winch is controlled to rotate to wind up the tension rope (251) to shorten the overall length of the main boom (200).

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