Automatic Lift Crane

Abstract

An automatic lifting crane includes a body and a crane platform mounted on the body, and is provided with a plurality of gripping mechanisms spaced apart from one another on the body, and a lifting drive mechanism for controlling the body to move up and down along a support, the gripping mechanisms including grippers and gripper drive mechanisms for controlling the opening and closing of the grippers, and stoppers are provided at the open and closed ends of the grippers for locking the support to the grippers. On the one hand, the present invention can prevent the automatic lifting crane from falling, thereby significantly improving safety, and on the other hand, it can provide stable support when the gripping mechanisms are operating, thereby improving the safety and stability of the automatic lifting crane.

Description

[Technical Field]

[0001] The present invention relates to the technical field of self-elevating tower cranes, in particular to self-elevating cranes. [Background technology]

[0002] Conventional building supports (e.g., columns) are generally lifted using tower cranes, vehicle cranes, or crawler cranes. Lifting using tower cranes has the following main drawbacks: (1) Tower cranes are all installed on the ground, and at least two tower cranes are required to complete the work, occupying a large amount of ground space; (2) When tower cranes are operating, the construction area must be fenced off to prevent passing pedestrians or vehicles from accidentally entering the construction area, occupying the original roadway and thereby obstructing traffic; and (3) conventional tower cranes are complex in structure, heavy in weight, and not only occupy ground space but also significantly increase material costs. When using vehicle cranes for lifting, it is not possible to lift higher. For example, wind power towers are over 300 meters tall, and conventional vehicle cranes cannot lift them that high, thus failing to achieve the objectives of the present invention. Lifting using crawler cranes is expensive.

[0003] Due to the above-mentioned shortcomings of conventional tower cranes, the applicant has further filed a patent application for a lifting tower crane, a column lifting device and a lifting method using the same (application number: 2019103550612), in which the lifting tower crane grips the column body of an already installed column, and a lifting device on the boom lifts the column to be installed above the already installed column and fixes and connects it to the already installed column, and after the column installation is completed, the gripping power mechanism alternately grips and releases the support between the adjacent or interphase gripping mechanism and another gripping mechanism to achieve lifting, and the column is raised to the target position and enters the next cycle. However, such a structure has the following shortcomings: (1) Because the gripping mechanism is installed at the opening and closing of the hoop, it can only control the loosening of the hoop, but cannot control the opening and closing angle, and therefore cannot avoid the cross beam on the column during ascent; (2) The self-elevating tower crane is not equipped with a fall prevention mechanism, so if the hoop cannot be gripped, no fall prevention measures can be taken, which significantly reduces safety; (3) Because slippage or rotation occurs between the gripper and the support, the invention does not have a rotation limiter to prevent this from occurring; (4) The structure is not suitable for gripping an inclined column; (5) The grippers of the gripping mechanism cannot be linked in the released and gripped states, meaning that when one set of gripping mechanisms is in the released state, it cannot be guaranteed that the other set of gripping mechanisms is in the gripped state; (6) The self-elevating tower crane poses safety risks, such as being prone to loosening and being unstable. Summary of the Invention [Problem to be solved by the invention]

[0004] SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic lifting crane which overcomes the above-mentioned drawbacks of the prior art and has high safety and work efficiency. [Means for solving the problem]

[0005] The technical solution of the present invention is as follows: An automatic lifting crane includes a body and a crane platform installed on the upper part of the body, and is provided with a plurality of gripping mechanisms installed at intervals on the body and a lifting drive mechanism for controlling the body to rise and fall along a support, the gripping mechanisms include grippers and gripper drive mechanisms for controlling the opening and closing of the grippers, and a catch is provided at the open and closed ends of the grippers for locking the support to the grippers. An automatic lifting crane comprising a body and a crane platform mounted on the upper part of the body, a plurality of gripping mechanisms installed at intervals on the body, and a lifting drive mechanism for controlling the body to rise and fall along a support, the gripping mechanisms including grippers and gripper drive mechanisms for controlling the opening and closing of the grippers, characterized in that a catch is provided at the open and closed ends of the grippers for locking the support to the grippers. A rotation limiting portion is provided between the support and the gripper to limit rotation therebetween. The gripping mechanism further includes a gripper base connected to the machine body, the gripper drive mechanism is connected between the gripper base and the gripper, the gripper includes at least two claw portions, and the stopper is provided at the tip position of the opening and closing ends of the gripper to connect the two claw portions together. One end of the claw portion is hingedly connected to the gripper base, and the other end is provided with an insertion hole for inserting a stopper. After the two claw portions are fitted and the two insertion holes are aligned, the stopper is inserted to lock the support. One end of the claw portion is hingedly connected to the gripper base, and the other end is provided with an insertion hole for inserting a stopper. After the two claw portions are fitted and the two insertion holes are aligned, the stopper is inserted to lock the support. A gripper release limit switch is provided between the gripper base and the gripper to detect whether the gripper is in a fully open state. The gripper release limit switch is connected to a controller, and an output end of the controller is connected to the gripper drive mechanism. After receiving a gripper release signal transmitted from the gripper release limit switch of one set of gripping mechanisms, the controller controls the grippers of the other set of gripping mechanisms to always be in a gripping state, thereby forming an interlocking system. The stopper is an electromagnetic stopper, and an up limit switch is provided inside the electromagnetic stopper, and a down limit switch is provided at the bottom of the gripper. When the stopper body of the electromagnetic stopper moves to the up limit switch, the opening and closing ends of the gripper are unlocked, and when the stopper body of the electromagnetic stopper moves to the down limit switch, the opening and closing ends of the gripper are locked. A plurality of gripper support seats are provided at intervals on the support body gripped by the gripping mechanism, the support surfaces of the gripper support seats are used to support the gripping mechanism, and support legs are provided between the gripper support seats and the support body. The maximum spacing between adjacent gripper support seats is 12 meters. When the support body gripped by the gripping mechanism is installed at an incline, the surface connected to the other lifting device of the crane platform is an inclined surface. The vehicle includes an upper vehicle and a lower vehicle, each of which is provided with at least two gripping mechanisms, one of which is provided at the top of the upper vehicle, and the lifting drive mechanism includes at least one drive cylinder and is provided in the internal cavity of the lower vehicle, and the telescopic end of the drive cylinder is connected to the upper vehicle, or if the number of drive cylinders is two or more, each drive cylinder is independently controlled. The support includes an already-installed support and a support to be lifted, the gripping mechanism grips the already-installed support, a lifting device is provided on the crane platform, the lifting device lifts and assembles the support to be lifted, and an automatic lifting crane gradually raises and lowers to the assembled support to continue the lifting operation, a conversion platform is provided on the top of the crane platform, or the crane platform is directly designed as a conversion platform, the conversion platform includes multiple mounting parts, and the mounting parts have multiple rows of connection holes from the inside to the outside for connecting and replacing the lifting device. The upper body has at least two sections, adjacent sections are removably connected, a reinforcing rib is provided within the gripper, and the shape of the gripper after closing is a circle or an N-gon, where N≧6. When the gripper drive mechanism is a hydraulic cylinder, the hydraulic cylinder is connected between the gripper and the gripper base, and oil is supplied to the hydraulic cylinder via a hydraulic oil tank. An oil level detection sensor is provided in the hydraulic oil tank and is used to detect whether the oil level in the hydraulic oil tank is lower than a target oil level. If the oil level is lower than the target oil level, a signal is sent to the controller. The controller is further used to control a stopper to lock the opening and closing ends of the gripper if the hydraulic cylinder fails or the oil level is lower than the target oil level. After the dangerous state is released, the controller controls the stopper to be removed and put into an idle state. [Effects of the Invention]

[0006] The beneficial effects of the present invention are as follows:

[0007] (1) By installing a stopper at the opening and closing end of the gripper, the two claws of the gripper can be connected together, preventing the automatic lifting crane from falling, greatly improving safety. (2) By connecting the gripper drive mechanism between the gripper base and the gripper, the opening and closing angle of the gripper can be controlled, and thus the self-elevating tower crane can avoid obstacles on the support, such as the cross beam, during the process of rising and falling, thereby realizing smooth rising and falling; (3) By installing a rotation limiter, the support can be prevented from rotating or sliding around the gripper, ensuring safety. (4) By installing an inclined surface on the crane platform, when the automatic lifting crane grasps the inclined support, the lifting device can still be kept vertical, thereby ensuring that the center of gravity of the lifting device is stable, and the lifting device and the automatic lifting crane are less likely to be damaged and stress is reduced; (5) By dividing the upper body into two sections, the stress strength can be reduced. The length of the lower section of the upper body is longer than that of the upper section, and most of the lower section needs to be inserted into the lower body. The hydraulic cylinder extends into the lower section of the upper body, which not only improves the strength of the lower section, but also makes the upper section shorter, resulting in greater bending strength and less stress. (6) By installing a gripper release limit switch, the release and gripping of each gripping mechanism of the machine can be linked; that is, after the grippers of one set of gripping mechanisms are released, the grippers of the other set of gripping mechanisms can be controlled to always be in a gripping state, thereby greatly improving safety and preventing the automatic lifting crane from falling. By installing an oil level detection sensor and combining the up limit switch and down limit switch of the stopper, the stopper will be activated and the gripper will be locked after the oil level in the hydraulic oil tank falls below the target oil level, preventing the gripper from losing its gripping function after oil loss or failure of the hydraulic oil tank occurs. (7) The installation of the gripper support seat can effectively stabilize the position and lifting posture of the automatic lifting crane, ensuring work safety, and the support surface is used to support the gripping mechanism, providing stable support when the gripping mechanism operates, greatly improving the accuracy and efficiency of lifting operations and improving the safety and stability of the automatic lifting crane. The combined installation of the gripper support seat and the protrusion of the support can quickly and accurately align the automatic lifting crane and the support, ensuring that the gripping mechanism quickly and accurately engages with the gripper support seat and the support during installation and operation, thereby improving the accuracy, stability and safety of the automatic lifting crane operation and reducing the occurrence of accidents. (8) By installing a conversion platform, lifting devices with different specifications can be exchanged, realizing the combination of one automatic lifting crane with different lifting devices. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic diagram of the overall structure of Example 1 of the present invention. [Figure 2] 1 is a schematic diagram of the lifting column state of the automatic lifting crane according to the first embodiment of the present invention; FIG. [Figure 3] 1 is a schematic diagram of an automatic lifting crane according to a first embodiment of the present invention jacking up an upper body. FIG. [Figure 4] 1 is a schematic diagram of the automatic lifting crane of the first embodiment of the present invention lifting up the lower body. FIG. [Figure 5] 1 is a schematic diagram of a three-dimensional structure of a gripping mechanism according to a first embodiment of the present invention (a stopper plate is not shown). [Figure 6] 1 is a node schematic diagram of a gripping support of a gripping mechanism according to a first embodiment of the present invention. FIG. [Figure 7] 1 is a schematic diagram of a node where a gripping mechanism according to a first embodiment of the present invention releases a support; [Figure 8] 1 is a schematic exploded view of an upper body and a lower body in accordance with a first embodiment of the present invention; [Figure 9]FIG. 10 is a schematic view of a gripper of a gripping mechanism according to a fourth embodiment of the present invention in a released state. [Figure 10] FIG. 10 is a schematic view showing a gripping state of a gripper of a gripping mechanism according to a fourth embodiment of the present invention. [Figure 11] FIG. 10 is a structural schematic diagram of a clasp according to a fourth embodiment of the present invention. [Figure 12] FIG. 10 is a structural schematic diagram of a gripper support seat according to a fifth embodiment of the present invention. [Figure 13] 10 is a structural schematic diagram of a gripper support seat supporting an automatic lifting crane according to a fifth embodiment of the present invention; FIG. [Figure 14] FIG. 10 is a schematic diagram illustrating the connection between the conversion platform and the flat arm crane in accordance with the sixth embodiment of the present invention. [Figure 15] 1 is a structural schematic diagram of a conversion platform according to Example 6 of the present invention; DETAILED DESCRIPTION OF THE INVENTION [Example]

[0009] The invention will now be described in more detail with reference to the drawings and specific examples in the specification.

[0010] As shown in Figures 1 to 8, this is an automatically rising crane, which includes a body 1 and a crane platform 2 mounted on the top of the body 1, with a lifting device 3 mounted on the crane platform 2, and with a plurality of gripping mechanisms 4 mounted at intervals on the body and a lifting drive mechanism for controlling the body to rise and fall along the support, with the gripping mechanism 4 including a gripper 41 and a gripper drive mechanism for controlling the opening and closing of the gripper 41, and the gripper grips or releases the support by controlling the opening and closing angle thereof by the gripper drive mechanism.

[0011] The above solution has the following advantages: By controlling the opening and closing angle of the gripper, it is possible to avoid obstacles, for example, when the gripper grips a pillar and climbs upward and encounters a cross beam on the pillar, by controlling the opening angle of the gripper, the self-elevating tower crane can avoid the cross beam and move up and down smoothly.

[0012] In this embodiment, the machine body 1 includes an upper body 11 and a lower body 12, and at least two gripping mechanisms 4 are installed on each of the upper body 11 and the lower body 12. Preferably, two gripping mechanisms are installed on the upper body 11, and three gripping mechanisms are installed on the lower body. Both the upper body 11 and the lower body 12 have a cylindrical structure. The lifting drive mechanism is a drive cylinder, which can be driven by electricity, air pressure, or oil. The lifting drive mechanism in this embodiment is preferably a hydraulic cylinder 5, which is installed in the lower body 12 and has its telescopic end connected to the upper body 11. The number of hydraulic cylinders 5 is preferably two, which are installed in parallel in the lower body 12 and are independently controlled, with one hydraulic cylinder serving as the working hydraulic cylinder and the other as the backup hydraulic cylinder. For example, the thrust of a single cylinder may be 200 tons and the working pressure may be 25 MPa, thereby ensuring that the upper body can be jacked up and raised when the self-lifting tower crane lifts the support. A hydraulic oil tank 6 is attached to the outer wall of the lower body 12 and is used to supply oil to the hydraulic cylinders 5. An oil level detection sensor is provided in the hydraulic oil tank 6, and is electrically connected to the input end of the controller of the control system. When the oil level detection sensor detects that the oil level in the hydraulic oil tank is lower than the target oil level, it will send a signal to the controller, which will then switch the working hydraulic cylinder to the standby hydraulic cylinder to perform jacking up, thereby preventing the working hydraulic cylinder from being unable to operate when there is no oil and greatly improving work efficiency. The controller also remotely communicates with the remote operation platform and notifies the operator, thereby preventing the hydraulic cylinder from being unable to operate the gripping mechanism to be in the gripping state when there is no oil, thereby reducing the risk.

[0013] In this embodiment, of the two gripping mechanisms 1# and 2# of the upper body 11, 1# is provided at the top and located below the crane platform, and 2# is installed adjacent to the position of the lower body 12. Of the three gripping mechanisms 3#, 4#, and 5# of the lower body 12, 5# is installed adjacent to the bottom of the lower body, 4# is installed adjacent to the middle upper part of the lower body, and 3# is installed adjacent to the upper part of the lower body, and the hydraulic oil tank 6 is located between 4# and 5#. Preferably, when the hydraulic cylinder 5 is in a non-operating state, the distance between gripping mechanisms 1# and 2# is greater than the distance between gripping mechanisms 2# and 3#, greater than the distance between gripping mechanisms 3# and 4#, and equal to the distance between gripping mechanisms 4# and 5#. This type of arrangement structure, on the one hand, can ensure the stability of each gripping mechanism gripping the support, that is, the top, bottom, center, upper center and lower center of the support are all gripped by the gripping mechanisms, making it less likely to become unbalanced and greatly improving safety; on the other hand, if one gripping mechanism breaks down and becomes loose, the other gripping mechanisms can also stably grip the support, so that the lifting and raising of the self-elevating tower crane is not affected.

[0014] In this embodiment, the length of the upper body 11 is much longer than the length of the lower body 12. For example, the upper body is 18 m long, the lower body is 11 m long, and the lower part of the upper body extends into the lower body, measuring 8 m. The upper body has a split structure, divided into sections A and B, and the two sections are fixed together by threaded connections, such as flanges. Gripper mechanism 1# is provided at section A, and gripper mechanism 2# is provided at section B and is installed adjacent to the top of section B. The length of section B is longer than that of section A. A connecting seat connected to a hydraulic cylinder 5 is provided near the center of the section B cavity, and the telescopic end of the hydraulic cylinder 5 extends into the cylindrical body of section B and is connected to the connecting seat.

[0015] In this embodiment, a plurality of upper cylindrical limit blocks 111 are provided on the outer wall at the lower end of section B of the upper body 11, spaced apart in the circumferential direction, and a plurality of lower cylindrical limit blocks 121 are provided on the inner wall at the upper end of the lower body 12, with a portion of section B of the upper body 11 inserted into the lower body 12, and the telescopic end of the hydraulic cylinder 5 inserted into section B and connected to the connecting seat of section B. When the hydraulic cylinder 5 drives the upper and lower bodies to operate, the upper cylindrical limit block 111 of the upper body moves to a position corresponding to the lower cylindrical limit block 121, thereby restricting the position. Preferably, the slider is a nylon slider.

[0016] In addition, to improve the strength of the fuselage, reinforcing ribs may be provided on the outer and / or inner walls of the fuselage, for example, outer annular ribs and inner annular ribs.

[0017] In this embodiment, the gripping mechanism 4 includes a gripper base 42 connected to the machine body, a gripper 41 connected to the gripper base 42, and a gripper drive mechanism for controlling the opening and closing of the gripper. The gripper drive mechanism is connected between the gripper base 42 and the gripper 41. The gripper base 42 includes an upper base body 421 and a lower base body 422, which are separated vertically. Each of the upper and lower base bodies includes a plurality of seat plates arranged at intervals above and below to form a multi-layer structure. The seat plates are connected circumferentially by vertical ribs. The seat plates have a polygonal structure, e.g., an octagonal shape. The reason for the polygonal configuration is that the gripper base is made of high-strength steel, which is difficult to bend if designed circularly. Therefore, the polygonal design not only makes it easy to bend but also ensures the strength of the gripper base. The upper base body 421 and the lower base body 422 are both annular structures. The gripper base 42 is fitted to the machine body and is integrally connected to the machine body by welding or screwing. The space between the upper and lower base members 421 and 422 is used to connect the gripper 41. The gripper 41 includes two claws 411. One end of each claw 411 is hingedly connected to the gripper base 42, and the other end is an open / close end. The two claws can be opened and closed along the hinge connection point. A gripper drive mechanism is connected between the gripper base and the gripper. The gripper drive mechanism is preferably a gripper cylinder 43. One gripper corresponds to two gripper cylinders 43 and is used to control the two claws 411, respectively. The claws have a certain thickness and are provided with connecting lugs extending from both the upper and lower end surfaces of each claw. The connecting end of the gripper cylinder is connected to the gripper base, i.e., between the upper and lower base members of the gripper base, and the telescopic end of the gripper cylinder is connected to the connecting lug of the claw. The gripper can be opened and closed by controlling the extension and retraction of the gripper cylinder 43. For example, the thrust of the gripper cylinder is 100 tons. Here, the gripper cylinder is also supplied with oil via a hydraulic oil tank.

[0018] In this embodiment, the shape of the gripper after closing is adapted to the shape of the support, for example, the support in this embodiment is a column, and the shape of the gripper after closing is circular.

[0019] In this embodiment, a stopper 7 for locking the support is provided at the open / closed end of the gripper 41. One end of the claw 411 is hingedly connected to the gripper base 42, and an insertion hole 71 for inserting a stopper is provided at the other end (also called the tip, i.e., the end away from the hinge connection end, but the tip is not particularly pointed). After the two claws 411 are fitted and the two insertion holes are aligned, the stopper 7 is inserted to lock the support. Preferably, a groove 4111 is opened at the tip of one claw of the gripper, and a bump 4112 extending outward is provided at the tip of the other claw. Both the groove 4111 and the bump 4112 are provided with insertion holes 71 that penetrate vertically. After the bump is inserted into the groove, the insertion holes between them are aligned, and the stopper 7 is inserted, allowing the gripping mechanism to grip the support.

[0013] In the present invention, by installing the stopper 7 and designing a structure in which the gripper fits the stopper, it is possible to prevent the gripper from loosening and releasing the support body after a gripper cylinder malfunctions, thereby greatly improving safety. Here, the stopper 7 in this embodiment is an automatically controlled stopper that does not require manual operation. Preferably, it is an electromagnetic stopper connected to a controller. The electromagnetic stopper is pre-fixed to the claw 411. When the automatic lifting crane is in operation and the oil level detection sensor detects that the oil level in the hydraulic oil tank is lower than the target oil level, the controller controls the operation of the gripper cylinder 43 of each gripping mechanism so that the groove between the two claws of the gripper 41 abuts against the bump, and then controls the operation of the electromagnetic stopper to insert the stopper into the insertion hole 71, connecting the two claws together, allowing the gripper to grip the support body and preventing it from loosening. Alternatively, when it is detected that a gripper cylinder malfunctions, the controller controls the operation of the gripper cylinder of the other gripper to insert the electromagnetic stopper and grip the support body. In other words, the structure of the present invention can significantly improve work efficiency and safety.

[0020] In this embodiment, a rotation limiting portion 8 is provided between the support and the gripper to limit rotation therebetween. Specifically, the rotation limiting portion includes a protrusion 81 provided on the support and a recess 82 provided inside the gripper, with the protrusion fittingly connected to the recess. Preferably, the protrusions 81 are provided symmetrically along the length of both sides of the support, e.g., as a ridge. The ridge may be provided along the entire length of the support or at intervals. Recesses 82 are provided on the inside of the two claws of the gripper opposite the protrusions 81. When the gripper grips the support, the recesses on both sides fit and connect to the protrusions, preventing rotation or slippage of the support, thereby significantly improving safety.

[0021] In this embodiment, the supports include already-installed supports and supports to be lifted, the gripping mechanism grips the already-installed supports, the lifting device is provided on the crane platform, the lifting device lifts and assembles the supports to be lifted, and the automatic lifting crane gradually ascends and descends to the assembled supports to continue the lifting work. Here, the supports may be, but are not limited to, columns for building houses, columns for wind power towers, and columns for multi-story bridges.

[0022] This embodiment will be specifically described using a wind power generation tower as an example.

[0023] The wind power tower in this embodiment includes four tower columns 9, which are installed at an incline and connected by cross beams 10, forming a trapezoidal cross section. Each tower column 9 is composed of multiple columns 91 joined together, each with a conical shape that is larger at the bottom and smaller at the top. Because the tower columns are installed at an incline, if the columns 91 were directly grasped by a gripping mechanism, they would tilt, causing the lifting device on the crane platform at the top of the machine to tilt. This would not only make the center of gravity unstable and prone to breakage or loss of strength, but also make lifting difficult. Therefore, in this embodiment, the surface of the crane platform 2 connected to the lifting device 3 is designed to be inclined, ensuring that the lifting device does not tilt on the crane platform and remains vertical.

[0024] A specific lifting method of the present invention is as follows.

[0025] First, a mobile crane or other lifting device is used to install the bottom columns, for example, the bottom two columns are installed first, and only the two columns of one column can be installed, or all two columns of four columns can be installed. Next, one column is selected, and an automatic lifting crane is installed on the first column of the bottom layer of the column, and then it is controlled to rise to the second column. The column to be installed is lifted by the lifting device on the crane platform, and the third column of each column is lifted and installed manually, and then the cross beams between adjacent columns are lifted and installed. After the installation of the third column of all tower columns is completed, the control system controls the operation of the gripper cylinder of the upper body to release the grippers, and each gripper of the lower body continues to grip the column, then controls the hydraulic cylinder of the upper body to extend to jack up the upper body, then controls the grippers of the upper body to grip the column, releases the grippers of the lower body, and controls the operation of the hydraulic cylinder to lift the lower body, repeating this process until the crane climbs to the next working position and continues lifting.When the automatic lifting crane encounters a cross beam during its ascent and controls the grippers to release, the opening angle of the grippers can be adjusted so that the grippers straddle the cross beam between adjacent columns, preventing them from crossing the cross beam and ascending along the already installed columns.

[0026] When a fall prevention operation is required for a self-elevating tower crane device, the two claws of each gripper are controlled to close, the bump is inserted into the groove, and then the electromagnetic stopper is controlled to automatically insert into the insertion hole, thereby locking the column.

[0027] In this embodiment, one of the four tower columns 9 is provided with a tower column rotating ladder 92, which rotates around the tower column to ascend, facilitating maintenance and installation.

[0028] In this embodiment, a ladder 13 may be installed inside the machine, and the inner diameter of the machine is large enough for at least one person to pass through. A manhole may be installed in the machine to allow people to enter the machine and perform maintenance and quality inspections on the internal components such as hydraulic cylinders, greatly improving convenience. [Example]

[0029] Based on Example 1, multiple reinforcing ribs are provided in the cavities of the two jaws of the gripper. By providing the reinforcing ribs, the strength of the gripper can be improved and the gripper can be prevented from breaking during the process of gripping the cylinder.

[0030] The other structures are the same as those in the first embodiment, and detailed explanations will be omitted here. [Example]

[0031] The difference from Example 1 is that the gripper has a polygonal shape after closing. Because the gripper is made of high-strength steel, a circular design would be difficult to bend. Therefore, an octagonal design is used, which not only makes it easier to bend but also ensures the strength of the gripper. Even if the cross section of the cylinder is circular, using a polygon with a larger number of sides makes it closer to a circle, allowing the cylinder to be gripped without being damaged. In this example, the number of sides of the polygon is preferably 6 or more, more preferably 8 or more.

[0032] The other structures are the same as those in the first embodiment, and detailed explanations will be omitted here. [Example]

[0033] 9 to 11, in this embodiment, a gripper release limit switch 44 is provided between the gripper base 42 and the gripper 41 to detect whether the gripper is in a fully open state. The limit switch may be a non-contact photoelectric switch or a contact limit switch; for example, the limit switch is attached to the gripper, and a limit position stopper is attached to the gripper base. In this embodiment, by installing the gripper release limit switch between the gripper base and the gripper, it is possible to detect whether the gripping mechanism of that set is in a released state, and if it is in a released state, it is ensured that the gripping mechanism of the other set is always in a gripping state, thereby improving the safety of the crane.

[0034] The gripper release limit switch 44 is connected to the input terminal of the controller, and the output terminal of the controller is connected to the gripper cylinder 43. After receiving a gripper release signal from the gripper release limit switch of one set of gripping mechanisms, the controller controls the grippers of the other set of gripping mechanisms to always remain in a gripping state, forming an interlocking system. Here, the controller may be a PLC controller or an integrated circuit with a single-chip microcomputer as its core. Forming an interlocking system between the gripper release limit switch, the controller, and the gripper cylinder not only ensures the automatic lifting of the upper and lower bodies, but also ensures that one set of gripping mechanisms is always in a gripping state, preventing the automatic lifting crane from falling.

[0035] To further improve safety, this embodiment can further install a gripper gripping limit switch 45 at the open / close end of the gripper to detect whether the gripper is in a closed state, and the gripper gripping limit switch 45 is connected to the input side of the controller. For example, if a gripper gripping limit switch is installed between the two jaws of the gripper, after the two jaws are closed, the limit switch can detect a close signal and send it to the controller, which determines that the two jaws are in a gripping state.

[0036] In this embodiment, an up limit switch 72 is provided inside the body of the catch plate 7 or at the top of the outer wall of the body, and a down limit switch 73 is provided at the bottom of the gripper 41. The up limit switch 72 and the down limit switch 73 are both connected to a controller, and the output terminal of the controller is connected to the control terminal of the catch plate 7. When the catch plate body of the catch plate moves to the up limit switch 72, the open / closed ends of the gripper 41 are unlocked, and when the catch plate body of the catch plate 7 moves to the down limit switch 73, the open / closed ends of the gripper are locked.

[0037] The working principle of this embodiment is as follows: when the automatic lifting crane needs to rise along a support (such as a pillar), the gripper gripping limit switch 45 on the gripper of each gripping mechanism of the lower body 12 detects that the two jaws 411 of the gripper are in a closed state, and sends a signal to the controller, and the controller controls the operation of each gripper cylinder 43 of the upper body 11 to release the gripper of each gripping mechanism of the upper body; when the gripper release limit switch 44 detects that the gripper is in a fully open state, it controls each gripper cylinder 43 of the lower body 12 to move the gripper so that it is always in a gripping state; An interlocking system is formed to prevent the grippers of the two bodies from being released at the same time. The upper body 11 is then jacked up and moved upward to lift up. After lifting, the grippers of the upper body 11 are then closed and controlled to grip the pillar. After detecting that the grippers have gripped, the gripper limit switches 45 of the upper body send a signal to the controller, which controls the operation of the gripper cylinders 43 of the lower body 12, causing the grippers of the lower body to be released and the lower body to be lifted. This process is repeated to achieve the lifting of the automatic lifting crane.

[0038] When the oil level detection sensor in the hydraulic oil tank 6 detects that the oil level in the hydraulic oil tank is lower than the target oil level, it sends the oil level information to the controller and prompts the system to replenish oil. When the gripper is gripping, the two claws of the gripper are mated with each other, i.e., the bump on the end of one claw is inserted into the groove on the end of the other claw to achieve engagement. After engagement, the insertion holes 71 on the two claws are aligned, thereby facilitating the insertion of the clasp body of the clasp 7 into the insertion hole 71, and the gripper is locked. When a malfunction occurs in the gripper cylinder 43 or the oil level becomes lower than the target oil level, the controller controls the stopper body of the stopper 7 to move toward the insertion hole, locks the opening and closing ends of the gripper, stops moving after moving to the down limit switch, locks, and after the dangerous state (for example, the oil level is sufficient) is released, the controller controls the stopper body of the stopper 7 to remove from the insertion hole, stops moving after moving to the up limit switch, and the stopper is in an idle state. [Example]

[0039] As shown in FIGS. 12 and 13, in this embodiment, a plurality of gripper support seats 93 are provided at intervals on the support body (the tower column 9 in the figure) gripped by the gripping mechanism 4. The gripper support seat 93 includes a support surface 931 and a plurality of support legs 932 arranged at intervals and connected between the support surface and the support body. Here, the surface of the support surface 931 connected to the support body is an arc-shaped surface, thereby conformably connecting to the support body, preferably by welding. The support legs are arranged at intervals on the bottom of the support surface, forming a comb-like shape. The maximum interval between adjacent gripper support seats is preferably 12 meters, which is sufficient to stably support all of the grippers of each gripping mechanism in the automatic lifting crane. Preferably, two gripper support seats are installed opposite each other, and each gripper support seat is provided with the protrusion 81 described in Example 1, the bottom surface of the protrusion 81 is connected to the top surface of the support surface and is installed on one side close to the support surface, and after the recesses 82 on the inner walls of the two claws of the gripper engage with the two protrusions 81 installed opposite each other, the two claws are also supported exactly on the support surfaces of the two gripper support seats installed opposite each other.

[0040] The support legs 932 of this embodiment are wedge-shaped, with dimensions gradually decreasing from the top to the bottom, thereby enhancing the load-bearing capacity of the gripper support seat.

[0041]

[0033] In this embodiment, the installation of the gripper support seat can effectively stabilize the position and lifting attitude of the automatic lifting crane, ensuring operational safety, and the support surface is used to support the gripping mechanism, providing stable support for the gripping mechanism when it operates, greatly improving the accuracy and efficiency of lifting operations and improving the safety and stability of the automatic lifting crane. The installation of the gripper support seat and the protrusion 81 of the support body 93 in combination can quickly and accurately align the automatic lifting crane and the support body, ensuring that the gripping mechanism quickly and accurately engages with the gripper support seat and the support body during installation and operation, thereby improving the accuracy, stability and safety of automatic lifting crane operation and reducing the occurrence of accidents. [Example]

[0042] As shown in Figures 14 and 15, the difference from Example 1 is that a conversion platform 21 is further connected to the top of the crane base and is used to connect different types of lifting equipment. The conversion platform 21 includes a platform body 211 formed by connecting trusses, and mounting parts for connecting the lifting equipment extend outward from the periphery of the platform body 211. For example, the platform body 211 in this example has a directional structure, and mounting parts are connected to the four corners of the platform body 211, and the mounting parts include screw plates 212 and reinforcing plates 213 connected between the screw plates and the platform body. The screw plate 212 is provided with multiple rows of connection holes 2121 from the inside to the outside for connecting and replacing lifting equipment, and the base or truss of the lifting equipment (e.g., flat arm crane) can be attached to the four screw plates. Since multiple rows of connection holes are provided inside and out, for example, one lifting equipment has small dimensions and four screw plates can be connected to multiple connection holes in the inner row, and another lifting equipment has large dimensions and four screw plates can be connected to multiple connection holes in the outer row, thereby making it possible to replace lifting equipment with different specifications and realize the combination of one automatic lifting crane with different lifting equipment.

[0043] In this embodiment, the platform body 211 is formed by connecting multiple truss steel beams, which can effectively distribute weight and force, enhance the stability and balance of the entire conversion platform, and distribute load and pressure evenly, thereby reducing local stress and improving the stability of the connecting members. The arrangement of multiple rows of connecting holes realizes the flexibility of combining the automatic lifting crane with different specifications of lifting equipment and reduces the cost required to modify the platform to accommodate different lifting equipment.

[0044] The above are merely specific embodiments of the present application, and the scope of protection of the present application is not limited thereto. Those skilled in the art can easily think of modifications or substitutions within the technical scope disclosed in the present application, and all of them should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application shall be governed by the scope of protection of the claims. [Explanation of symbols]

[0045] 1 aircraft 2 crane platforms 3 Lifting equipment 4 Gripping mechanism 5 hydraulic cylinders 6 Hydraulic oil tank 7 Clasp 8 Rotation limiter 9 Tower pillar 10 Crossbeam 11 Upper fuselage 12 Lower fuselage 13 Ladder 21 Conversion Platform 41 Gripper 42 Gripper base 43 Gripper cylinder 44 Gripper release limit switch 45 Gripper gripping limit switch 71 Insertion hole 72 Up limit switch 73 Down limit switch 81 Convex part 82 recess 91 Column 92 Tower Rotating Ladder 93 Gripper support seat 111 Upper barrel limit block 121 Lower barrel limit block 211 Platform body 212 Screw plate 213 Reinforcement plate 411 Claw part 421 Theravada 422 Gezatai 931 Support surface 932 Support leg 2121 Connection hole 4111 Groove 4112 Bump

Claims

1. An automatic lifting crane comprising a body and a crane platform mounted on the upper part of the body, a plurality of gripping mechanisms installed at intervals on the body, and a lifting drive mechanism for controlling the body to rise and fall along a support, the gripping mechanisms including grippers and gripper drive mechanisms for controlling the opening and closing of the grippers, characterized in that a catch is provided at the open and closed ends of the grippers for locking the support to the grippers.

2. 2. The self-lifting crane according to claim 1, wherein a rotation limiting portion is provided between the support body and the gripper to limit rotation therebetween.

3. 2. The automatic lifting crane according to claim 1, wherein the gripping mechanism further includes a gripper base connected to the machine body, the gripper drive mechanism is connected between the gripper base and the gripper, the gripper includes at least two claws, and the stopper is provided at a tip position of an open / closed end of the gripper to connect the two claws together.

4. 4. The automatic lifting crane according to claim 3, wherein one end of the claw portion and the gripper base are hingedly connected, and the other end is provided with an insertion hole for inserting a stopper, and after the two claw portions are fitted and the two insertion holes are aligned, the stopper is inserted to lock the support body.

5. 4. The automatic lifting crane according to claim 3, wherein a gripper release limit switch is provided between the gripper base and the gripper to detect whether the gripper is in a fully open state, the gripper release limit switch is connected to a controller, an output end of the controller is connected to the gripper drive mechanism, and after receiving a gripper release signal transmitted from the gripper release limit switch of one set of gripping mechanisms, the controller controls the grippers of the other set of gripping mechanisms to always be in a gripping state, thereby forming an interlocking system.

6. 6. The automatically rising crane according to claim 1, wherein the stopper is an electromagnetic stopper, an up limit switch is provided inside the electromagnetic stopper, a down limit switch is provided at the bottom of the gripper, and when a stopper body of the electromagnetic stopper moves to the up limit switch, the open / closed ends of the gripper are put into an unlocked state, and when the stopper body of the electromagnetic stopper moves to the down limit switch, the open / closed ends of the gripper are put into a locked state.

7. 6. The automatic lifting crane according to claim 1, wherein a plurality of gripper support seats are provided at intervals on the support body gripped by the gripping mechanism, the support surfaces of the gripper support seats are used to support the gripping mechanism, and support legs are provided between the gripper support seats and the support body.

8. 8. The self-lifting crane according to claim 7, wherein the maximum distance between adjacent gripper support seats is 12 meters.

9. 6. An automatic lifting crane according to claim 1, wherein when the support body gripped by the gripping mechanism is installed at an incline, the surface of the crane platform connected to the other lifting device is an inclined surface.

10. The automatic lifting crane according to any one of claims 1 to 5, characterized in that the body includes an upper body and a lower body, each of which is provided with at least two gripping mechanisms, one of which is provided on the top of the upper body, the lifting drive mechanism including at least one drive cylinder and provided in the internal cavity of the lower body, the telescopic end of the drive cylinder being connected to the upper body, or when the number of drive cylinders is two or more, each drive cylinder is independently controlled.

11. The automatic lifting crane according to any one of claims 1 to 5, characterized in that the supporting body includes an already-installed supporting body and a supporting body to be lifted, the gripping mechanism grips the already-installed supporting body, a lifting device is provided on the crane platform, the lifting device is used to lift and assemble the supporting body to be lifted, and the automatic lifting crane gradually raises and lowers to the assembled supporting body to continue the lifting operation, a conversion platform is provided on the top of the crane platform, or the crane platform is directly designed as a conversion platform, the conversion platform includes multiple mounting parts, and the mounting parts are provided with multiple rows of connection holes from the inside to the outside for connecting and replacing the lifting device.

12. The self-lifting crane of claim 10, characterized in that the upper body is provided with at least two sections, adjacent sections are removably connected, a reinforcing rib is provided within the gripper, and the shape of the gripper after closing is a circle or an N-gon, where N≧6.

13. 6. The automatic lifting crane according to claim 3, wherein when the gripper drive mechanism is a hydraulic cylinder, the hydraulic cylinder is connected between the gripper and the gripper base, and oil is supplied to the hydraulic cylinder via a hydraulic oil tank, and an oil level detection sensor is provided in the hydraulic oil tank, and is used to detect whether the oil level in the hydraulic oil tank is lower than a target oil level, and if the oil level is lower than the target oil level, a signal is sent to the controller, and the controller is further used to control a stopper to lock the opening and closing ends of the gripper if the hydraulic cylinder fails or the oil level is lower than the target oil level, and after the dangerous state is released, the controller controls the stopper to be released and put into an idle state.

Images