Crawler crane and method of using the same

Abstract

The application provides a crawler crane and a use method thereof. The crawler crane comprises a super-lifting mast, a super-lifting luffing pulley block, a traction device, a pull plate assembly and a main arm. The super-lifting luffing pulley block comprises a fixed pulley block and a movable pulley block connected with the fixed pulley block. The movable pulley block can move towards the fixed pulley block or away from the fixed pulley block. The fixed pulley block is fixedly connected to the end of the super-lifting mast. The pull plate assembly is connected to the main arm. The pull plate assembly is arranged at the end of the main arm away from the rotary table of the crawler crane. The traction device is connected with the movable pulley block. The traction device drives the movable pulley block to move towards the pull plate assembly, so that the movable pulley block is connected with the pull plate assembly. The crawler crane can improve the adaptability of the crawler crane to the working site, improve the work efficiency of installation and save time.

Description

Technical Field

[0001] This invention relates to the field of basic construction technology, and in particular to a crawler crane and its method of use. Background Technology

[0002] In superlift operation, the connection of the superlift pull plate of the existing crawler crane adopts the following steps: First, operate the main luffing winch of the crawler crane to release the rope, so that the superlift mast is lowered to a set angle towards the ground. The superlift luffing pulley block is connected to the end of the superlift mast. At this time, the superlift luffing winch continues to release the rope, so that the movable pulley of the superlift luffing pulley block is lowered by the traction of the superlift counterweight mounting block. When the superlift counterweight mounting block is close to the boom, stop releasing the wire rope of the superlift luffing winch. Manually remove the superlift counterweight mounting block and place it in a warehouse or designated storage location. Use slings or ropes to connect the wire rope on the auxiliary crane to the movable pulley, and operate the auxiliary crane to pull the movable pulley to the connection point of the superlift pull plate, so that the movable pulley is connected to the superlift pull plate. The connection of the super-lift pull plate in the prior art has the following disadvantages: (1) It requires an auxiliary crane to wait on the side to assist in the connection of the super-lift luffing pulley block and the pull plate. Therefore, the requirements for the work site are greater and it is not applicable to small work sites; (2) Using a crane for auxiliary work is inefficient and wastes time. Occupying an auxiliary crane increases the operating cost. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a crawler crane that can solve the problems existing in the prior art, improve the adaptability of the crawler crane to the work site, improve the installation efficiency, and save time.

[0004] This invention provides a crawler crane, including a superlift mast, a superlift luffing pulley block, a traction device, a tie plate assembly, and a main boom. The superlift luffing pulley block includes a fixed pulley block and a movable pulley block connected to the fixed pulley block. The movable pulley block is movable towards or away from the fixed pulley block. The fixed pulley block is fixedly connected to the end of the superlift mast. The tie plate assembly is connected to the main boom and is located at one end of the main boom away from the turntable of the crawler crane. The traction device is connected to the movable pulley block and drives the movable pulley block to move towards the tie plate assembly, thereby connecting the movable pulley block to the tie plate assembly.

[0005] In one embodiment, the traction device includes a hoisting mechanism, a first guide pulley, a second guide pulley, a third guide pulley, and a fourth guide pulley. The hoisting mechanism is mounted on the turntable of the crawler crane. The first guide pulley and the second guide pulley are arranged opposite to each other. The first guide pulley is located at one end of the super-lift mast near the turntable, and the second guide pulley is located at one end of the super-lift mast near the fixed pulley block. The third guide pulley and the fourth guide pulley are respectively connected to the main boom. The third guide pulley and the fourth guide pulley are spaced apart along the length direction of the main boom. The hoisting wire rope of the hoisting mechanism is arranged to pass through the first guide pulley, the end of the super-lift mast, the second guide pulley, the third guide pulley, and the fourth guide pulley in sequence. When the movable pulley block is vertically downward, it is located between the third guide pulley and the fourth guide pulley. The end of the hoisting wire rope is connected to the movable pulley block. When the hoisting wire rope is tightened, it can drive the movable pulley block to move towards the pull plate assembly.

[0006] In one embodiment, the traction device includes a drive mechanism connected to the main arm. After the movable pulley group is connected to the drive mechanism, the drive mechanism can drive the movable pulley group to move towards the pull plate assembly.

[0007] In one embodiment, the drive mechanism includes a sensor and a self-locking buckle. The self-locking buckle is electrically connected to the sensor. When the sensor detects that the movable pulley group enters the range of the self-locking buckle, the self-locking buckle engages with the movable pulley group to achieve automatic connection.

[0008] In one embodiment, the traction device includes a first winch and a fourth pulley, the fourth pulley being connected to the main boom. The first winch is disposed between the turntable of the crawler crane and the fourth pulley. A movable pulley assembly is disposed between the first winch and the fourth pulley. A first wire rope of the first winch passes around the fourth pulley and connects to the movable pulley assembly. Tightening the first wire rope can drive the movable pulley assembly to move towards the pulley assembly. Alternatively, the traction device includes a second winch and a fourth pulley, the fourth pulley being connected to the main boom. The second winch is disposed at one end of the main boom near the pulley assembly. The fourth pulley is disposed between the movable pulley assembly and the winch. A second wire rope of the second winch passes around the fourth pulley and connects to the movable pulley assembly. Tightening the second wire rope can drive the movable pulley assembly to move towards the pulley assembly.

[0009] In one embodiment, the main boom includes an upper chord, a lower chord, and a vertical post. The upper chord and the lower chord are arranged opposite to each other. The vertical post is fixedly connected between the upper chord and the lower chord. One end of the fourth guide wheel is fixedly connected to the upper chord. When the other end of the fourth guide wheel is connected to the vertical post, the fourth guide wheel is disposed inside the main boom. When the other end of the fourth guide wheel is connected to the upper chord, the fourth guide wheel is disposed on the surface of the upper chord. The hoisting wire rope, the first wire rope, or the second wire rope can be arranged to pass around the fourth guide wheel.

[0010] In one embodiment, the traction device includes a counterweight mounting block, which is detachably connected to the main boom. When the movable pulley group is connected to the counterweight mounting block, the counterweight mounting block is detached from the main boom. Under the gravity of the counterweight mounting block, the movable pulley group can move away from the fixed pulley group. When the movable pulley group moves to the same horizontal plane as the upper chord of the main boom, the counterweight mounting block is connected to the main boom, and the counterweight mounting block is detached from the movable pulley group.

[0011] In one embodiment, the counterweight mounting block is installed on the fourth section of the main boom before being connected to the movable pulley group; the counterweight mounting block is installed on the fourth section of the main boom after being disassembled from the movable pulley group.

[0012] The present invention also relates to a method of using the above-mentioned crawler crane, the method comprising:

[0013] The movable pulley block of the superlift luffing pulley is moved towards the main boom; the hoisting wire rope of the hoisting mechanism is arranged to pass sequentially around the first pass pulley, the end of the superlift mast, the second pass pulley, the third pass pulley, and the fourth pass pulley; the movable pulley block of the superlift luffing pulley is connected to one end of the hoisting wire rope; the hoisting mechanism tightens the hoisting wire rope, causing the hoisting wire rope to pull the movable pulley block towards the connection point of the pull plate assembly.

[0014] Connect the movable pulley group of the luffing pulley group to the traction device, and the traction device drives the movable pulley group to move towards the pull plate assembly; connect the movable pulley group to the pull plate assembly.

[0015] In one embodiment, before connecting the movable pulley block to the traction device, the superlift mast is lowered towards the ground, bringing the movable pulley block of the superlift luffing mechanism closer to the counterweight mounting block of the main boom; one end of the counterweight mounting block is detached from the main boom and connected to the movable pulley block; the other end of the counterweight mounting block is detached from the main boom, causing the counterweight mounting block to detach from the main boom; the superlift mast is raised, moving it away from the ground, and the distance between the movable pulley block and the fixed pulley block increases under the gravity of the counterweight mounting block.

[0016] The crawler crane of the present invention connects the traction device to the main boom. The traction device pulls the movable pulley block of the super-lift luffing pulley block to the connection point of the tie plate assembly, thereby connecting the movable pulley block with the tie plate assembly. This improves the crawler crane's ability to utilize the work site and solves the problem in the prior art where auxiliary cranes cannot be used due to limited space. The crawler crane can achieve the connection between the super-lift luffing pulley block and the tie plate assembly through its own structure, improving the convenience of installation, saving time, and reducing the operating costs of using auxiliary cranes in the prior art. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the crawler crane and the counterweight mounting block in preparation for connection according to the first embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of the structure of the crawler crane and the counterweight mounting block after connection according to the first embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the structure of the counterweight mounting block in the first embodiment of the present invention, showing one end of the block being installed with the main arm.

[0021] Figure 4 This is a schematic diagram of the structure in the first embodiment of the present invention, showing the other end of the counterweight mounting block being installed with the main arm during storage.

[0022] Figure 5 This is a schematic diagram of the structure of the counterweight mounting block housed inside the main arm according to the first embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the structure of the traction device of the first embodiment of the present invention, which drives the luffing pulley and the pull plate assembly to connect.

[0024] Figure 7 This is a schematic diagram of the fourth arm of the first embodiment of the present invention.

[0025] Figure 8 This is a schematic diagram of the structure of the crawler crane pulling up the main boom according to the first embodiment of the present invention.

[0026] Explanation of reference numerals: Superlift mast - 11; Superlift luffing pulley block - 12; Fixed pulley block - 121; Moving pulley block - 122; First guide pulley - 131; Second guide pulley - 132; Third guide pulley - 133; Fourth guide pulley - 134; First mounting section - 1341; Second mounting section - 1342; Roller - 1343; Counterweight mounting block - 135; Hoisting mechanism - 136; Hoisting wire rope - 1361; Pull plate assembly - 14; Main boom - 15; Fourth boom section - 151; Upper chord - 1511; Lower chord - 1512; Upright - 1513; Fifth boom section - 152; Turntable - 16; Main luffing mechanism - 17; Superlift luffing mechanism - 18.

[0027] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0028] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. Based on the description of the present invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of the present invention.

[0029] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," etc., 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. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0030] The terms “upper,” “lower,” “left,” “right,” “front,” “back,” “top,” “bottom,” “inner,” and “outer,” etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of the invention is in use. They are only for the convenience of description and simplification, 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 the present invention.

[0031] The terms “first,” “second,” “third,” etc., are used merely to distinguish elements with similar properties, not to indicate or imply relative importance or a specific order.

[0032] The terms “include,” “comprising,” or any other variation thereof are intended to cover non-exclusive inclusion, which includes not only the elements listed but also other elements not expressly listed.

[0033] First Embodiment

[0034] like Figures 1 to 8 As shown, the crawler crane includes a superlift mast 11, a superlift luffing pulley block 12, a traction device, a tie plate assembly 14, and a main boom 15. The superlift luffing pulley block 12 includes a fixed pulley block 121 and a movable pulley block 122 connected to the fixed pulley block 121. The movable pulley block 122 can move towards or away from the fixed pulley block 121. The fixed pulley block 121 is fixedly connected to the end of the superlift mast 11. The tie plate assembly 14 is connected to the main boom 15 and is located at one end of the main boom 15 away from the turntable 16 of the crawler crane. The traction device is connected to the movable pulley block 122 and drives the movable pulley block 122 to move towards the tie plate assembly 14, so that the movable pulley block 122 is connected to the tie plate assembly 14. In this embodiment, the crawler crane also includes a turntable 16, a main luffing mechanism 17, and an overlift luffing mechanism 18. The main luffing mechanism 17 and the overlift luffing mechanism 18 are respectively connected to the turntable 16. The main luffing mechanism 17 is used to control the lifting and lowering of the overlift mast 11, and the overlift luffing mechanism 18 is used to control the lifting and lowering of the overlift luffing pulley block 12. The fixed pulley block 121 of the overlift luffing pulley block 12 is connected to the end of the overlift mast 11 by a pin. The fixed pulley block 121 of the overlift luffing pulley block 12 is provided with a fixed pulley, and the movable pulley block 122 of the overlift luffing pulley block is provided with a movable pulley.

[0035] The crawler crane of the present invention connects the traction device to the main boom 15. The traction device pulls the movable pulley block 122 of the super-lift luffing pulley block 12 to the connection point of the pull plate assembly 14, so that the movable pulley block 122 is connected to the pull plate assembly 14. This improves the crawler crane's ability to use the work site and solves the problem in the prior art that auxiliary cranes cannot be used due to small site size. The crawler crane can achieve the connection between the super-lift luffing pulley block 12 and the pull plate assembly 14 through its own structure, which improves the convenience of installation, saves time, and also reduces the operating cost of using auxiliary cranes in the prior art.

[0036] Preferably, the traction device includes a counterweight mounting block 135, which is detachably connected to the main boom 15. The counterweight mounting block 135 is located at the fourth section of the main boom 151. When the pulley block 122 is connected to the counterweight mounting block 135, the counterweight mounting block 135 is disassembled from the main boom 15. Since the end of the superlift mast is located within the length of the fourth section of the fourth boom 151 when the superlift mast is tilted forward, the counterweight mounting block 135 is located at the fourth section of the fourth boom 151 so that the installation of the pulley block 122 and the counterweight mounting block 135 does not require the use of other mechanical structures and so that the installation of the pulley block 122 and the counterweight mounting block 135 is more convenient. Specifically, the two ends of the counterweight mounting block 135 are connected to the main boom 15 via the first pin and the second pin, respectively. In the initial state, the counterweight mounting block 135 is installed on the main boom 15. After the superlift luffing pulley block 12 and the superlift mast 11 are installed, the superlift luffing pulley block 12 becomes a horizontal or tilting turntable 16, causing the main luffing mechanism 17 to retract the rope and the superlift mast 11 to be raised to the set height. At this time, the superlift luffing pulley block 12 is set vertically, and a forklift or auxiliary crane is used to lift the counterweight mounting block 135. The main boom 15 is moved to the bottom of the superlift luffing pulley block 12. The first pin connecting the counterweight mounting block 135 and the main boom 15 is removed. The third pin connects the moving pulley block 122 and the counterweight mounting block 135. The second pin connecting the counterweight mounting block 135 and the main boom 15 is removed, so that the counterweight mounting block 135 is detached from the main boom 15. The main luffing mechanism 17 retracts the rope, and the superlift mast 11 rises away from the ground, preparing for the installation of the main boom 15 and the superlift luffing pulley block 12.

[0037] Preferably, when the movable pulley block 122 moves to the same horizontal plane as the upper chord 1511 of the main boom 15, the counterweight mounting block 135 is connected to the main boom 15, and the counterweight mounting block 135 is disassembled from the movable pulley block 122. Specifically, the main luffing mechanism 17 releases the rope, causing the superlift mast 11 to tilt forward. Simultaneously, the superlift luffing mechanism 18 releases the rope, causing the movable pulley block 122 of the superlift luffing pulley block 12 to move away from the fixed pulley block 121, i.e., towards the main boom 15. The counterweight mounting block 135 is used to accelerate the descent speed of the movable pulley block 122. When the movable pulley block 122 descends to the middle position of the fourth boom section 151 of the main boom 15, the main luffing mechanism 17 stops releasing the rope and keeps the superlift mast 11 stationary. The superlift luffing mechanism 18 continues releasing the rope until the counterweight mounting block 135 reaches the installation position of the fourth boom section 151, at which point the counterweight mounting block 135 is moved away from the movable pulley block 122. One end of the counterweight mounting block 135 is connected to the main boom 15 via a second pin. Then, the superlift luffing mechanism 18 is operated to continue releasing the rope, causing the counterweight mounting block 135 to rotate counterclockwise around the second pin. The third pin is then removed, allowing the end of the counterweight mounting block 135 near the movable pulley block 122 to be connected to the main boom 15 via a first pin, thus completely fixing the counterweight mounting block 135 to the main boom 15 and storing it. Then, the superlift luffing mechanism 18 is operated to retract the rope, raising the movable pulley block 122 slightly above the main boom 15. By directly connecting the counterweight mounting block 135 to the main boom 15 after use, the storage problem of the counterweight mounting block 135 in the prior art is solved, and the installation efficiency is improved.

[0038] Preferably, the traction device includes a hoisting mechanism 136, a first pulley 131, a second pulley 132, a third pulley 133, and a fourth pulley 134. The hoisting mechanism 136 is connected to the turntable 16 of the crawler crane. The first pulley 131 and the second pulley 132 are connected to the super-lift mast 11, with the first pulley 131 and the second pulley 132 arranged opposite to each other. The second pulley 132 is located at one end of the super-lift mast 11 near the turntable 16, and the first pulley 131 is located at one end of the super-lift mast 11 near the fixed pulley block 121. The third pulley 133 and the fourth pulley 134 are respectively connected to the main... The boom 15 has a third pulley 133 and a fourth pulley 134 spaced apart along its length. The hoisting wire rope 1361 of the hoisting mechanism 136 passes sequentially around the first pulley 131, the end of the super-lift mast 11, the second pulley 132, the third pulley 133 and the fourth pulley 134. When the movable pulley block 122 is vertically downward, it is located between the third pulley 133 and the fourth pulley 134. The end of the hoisting wire rope 1361 is connected to the movable pulley block 122. When the hoisting wire rope 1361 is tightened, it can drive the movable pulley block 122 to move towards the pull plate assembly 14. In this embodiment, the fourth pulley 134 is connected to the fourth section 151 or the fifth section 152 of the main boom 15. Since the head of the pulley assembly 14 is connected to the head of the main boom 15, the head of the pulley assembly 14 is straightened, and the tail of the pulley assembly 14 is located near the fourth section 151 or the fifth section 152. Therefore, placing the fourth pulley 134 on the fourth section 151 allows the first wire rope of the first winch to pull the movable pulley block 122 from vertical downwards. The position is pulled to the right to the tail of the pull plate assembly 14 and connected to it. Setting it on the fourth section of the boom 151 is more convenient. If it is set on the fifth section of the boom, the hoisting wire rope 1361 will have to be pulled a longer section. The wire rope itself is heavy (2 meters weighs 10 kg). After the moving pulley block 122 is connected to the pull plate assembly 14, the hoisting wire rope 1361 needs to be manually retracted. The excessive weight of the hoisting wire rope 1361 will make manual operation more difficult.

[0039] Preferably, the main boom 15 includes an upper chord 1511, a lower chord 1512, and a plurality of uprights 1513. The upper chord 1511 and the lower chord 1512 are arranged opposite to each other, and each upright 1513 is fixedly connected between the upper chord 1511 and the lower chord 1512. One end of the fourth guide wheel 134 is fixedly connected to the upper chord 1511. When the other end of the fourth guide wheel 134 is connected to the upright 1513, the fourth guide wheel 134 is arranged inside the main boom 15. When the other end of the fourth guide wheel 134 is connected to the upper chord 1511, the fourth guide wheel 134 is arranged on the surface of the upper chord 1511, and the hoisting wire rope 1361, the first wire rope, or the second wire rope can be arranged to pass around the fourth guide wheel 134. Specifically, the fourth pulley 134 includes a first mounting section 1341, a roller 1343, and a second mounting section. The roller 1343 is rotatably connected between the first mounting section 1341 and the second mounting section 1342, forming an acute angle between them. Initially, the first mounting section 1341 is fixedly connected to the upper chord 1511, and the second mounting section 1342 is connected to the upright 1513 via a fourth pin. When it is necessary to connect the movable pulley block 122 to the main boom 15, the fourth pin is disassembled to detach the second mounting section 1342 from the upright 1513, and the roller 1343 rotates... The second mounting section 1342 and roller 1343 are moved above the upper chord 1511, connecting the second mounting section 1342 to the upper chord 1511. At this point, a triangular structure is formed between the first mounting section 1341, the second mounting section 1342, and the upper chord 1511. The hoisting wire rope 1361 is pulled to the fifth boom section 152 by a rope winch, allowing the hoisting wire rope 1361 to bypass the fourth pulley 134. Then, the operator manually pulls the hoisting wire rope 1361 to the movable pulley block 122, and secures the hoisting wire rope 1361 to the movable pulley block 122 using slings or ropes. In this embodiment, the structure and arrangement of the third pulley 133 are the same as those of the fourth pulley 134, and will not be described in detail here.

[0040] Preferably, the hoisting mechanism 136 retracts the rope, and the hoisting wire rope 1361 pulls the movable pulley block 122 towards the pulley plate assembly 14 until the movable pulley block 122 reaches the installation position of the pulley plate assembly 14, connecting the movable pulley block 122 to the pulley plate assembly 14. During the connection process between the pulley plate assembly 14 and the movable pulley block 122, the alignment of the holes can be adjusted by releasing the hoisting wire rope 1361 or by lowering the super-lift mast 11 forward. After the pulley plate assembly 14 is connected, the next step of raising the boom in the super-lift condition can proceed.

[0041] The present invention also relates to a method of using a crawler crane, the method comprising:

[0042] The first step is to move the movable pulley block 122 of the superlift luffing pulley block 12 towards the main boom 15; that is, first lower the superlift mast 11 towards the ground so that the movable pulley block 122 of the superlift luffing mechanism 18 is close to the counterweight mounting block 135 of the main boom 15.

[0043] The second step involves detaching one end of the counterweight mounting block 135 from the main boom 15 and connecting it to the movable pulley block 122. The other end of the counterweight mounting block 135 is then detached from the main boom 15, causing the counterweight mounting block 135 to separate from the main boom 15. Specifically, the first pin connecting the counterweight mounting block 135 to the main boom 15 is removed, and the movable pulley block 122 is connected to the counterweight mounting block 135 via the third pin. The second pin connecting the counterweight mounting block 135 to the main boom 15 is then removed, causing the counterweight mounting block 135 to separate from the main boom 15. This allows the main luffing mechanism 17 to wind up the rope, and the superlift mast 11 to rise away from the ground, preparing for the installation of the main boom 15 and the superlift luffing pulley block 12.

[0044] The third step involves raising the superlift mast 11, causing it to move away from the ground. Under the weight of the counterweight mounting block 135, the distance between the movable pulley block 122 and the fixed pulley block 121 increases. Specifically, after the main boom 15 is installed, the main luffing mechanism 17 releases rope, causing the superlift mast 11 to tilt forward. Simultaneously, the superlift luffing mechanism 18 releases rope, causing the movable pulley block 122 of the superlift luffing pulley block 12 to move away from the fixed pulley block 121, i.e., closer to the main boom 15. The counterweight mounting block 135 accelerates the descent speed of the movable pulley block 122. When the movable pulley block 122 descends to the middle position of the fourth section 151 of the main boom 15, the main luffing mechanism 17 stops releasing rope. Keeping the superlift mast 11 stationary, the superlift luffing mechanism 18 continues to release the rope until the counterweight mounting block 135 reaches the installation position of the fourth boom 151. Connect the end of the counterweight mounting block 135 away from the moving pulley block 122 to the main boom 15 via the second pin. Then, operate the superlift luffing mechanism 18 to continue releasing the rope, causing the counterweight mounting block 135 to rotate counterclockwise around the second pin. Remove the third pin, and connect the end of the counterweight mounting block 135 near the moving pulley block 122 to the main boom 15 via the first pin, so that the counterweight mounting block 135 is completely fixed to the main boom 15 and can be stored. Then, the superlift luffing mechanism 18 retracts the rope, raising the moving pulley block 122 slightly above the main boom 15.

[0045] Fourth step: Connect the movable pulley block 122 of the luffing pulley block 12 to the traction device. The traction device drives the movable pulley block 122 to move towards the pull plate assembly 14. Specifically, when it is necessary to connect the movable pulley block 122 to the main boom 15, disassemble the fourth pin to detach the second mounting section 1342 from the upright 1513, rotate the second mounting section 1342 and the roller 1343 to above the upper chord 1511, so that the second mounting section 1342 and the upper chord 1511 are connected. 11. At this point, a triangular structure is formed between the first installation section 1341, the second installation section 1342, and the upper chord 1511. The hoisting wire rope 1361 is pulled to the fifth boom section 152 via a rope winch, allowing it to bypass the fourth pulley 134. Then, the operator manually pulls the hoisting wire rope 1361 to the movable pulley block 122, and secures it to the movable pulley block 122 using slings or ropes. In this embodiment, the structure and arrangement of the third pulley 133 are the same as those of the fourth pulley 134, and will not be described in detail here.

[0046] The fifth step is to connect the movable pulley block 122 to the pull plate assembly 14. Specifically, the lifting mechanism 136 winds up the rope, and the lifting wire rope 1361 pulls the movable pulley block 122 toward the pull plate assembly 14 until the movable pulley block 122 reaches the installation position of the pull plate assembly 14, and then connects the movable pulley block 122 to the pull plate assembly 14.

[0047] Second Embodiment

[0048] The tracked crane in this embodiment is structurally similar to the tracked crane in the first embodiment, except that the structure of the traction device is different.

[0049] Specifically, the traction device includes a drive mechanism connected to the main arm 15. After the movable pulley block 122 is connected to the drive mechanism, the drive mechanism can drive the movable pulley block 122 to move towards the pull plate assembly 14. In this embodiment, the drive mechanism includes a mounting base and a driver. The mounting base is fixedly connected inside the main arm 15, and the driver is connected to the mounting base. The movable pulley block 122 is connected to the drive end of the driver, and the driver can drive the movable pulley block 122 to move along the length direction of the main arm 15. The driver is preferably a motor or a telescopic cylinder, but is not limited to these.

[0050] Preferably, the drive mechanism includes a sensor and a self-locking buckle. The self-locking buckle is electrically connected to the sensor and is fixedly connected to the drive end of the driver. When the sensor detects that the movable pulley group 122 enters the range of the self-locking buckle, the self-locking buckle engages with the movable pulley group 122 to achieve automatic connection, which not only has high work efficiency, but also saves manpower and time.

[0051] The present invention also relates to a method of using a crawler crane, the method comprising:

[0052] The first step is to move the movable pulley block 122 of the superlift luffing pulley block 12 towards the main boom 15; that is, first lower the superlift mast 11 towards the ground so that the movable pulley block 122 of the superlift luffing mechanism 18 is close to the counterweight mounting block 135 of the main boom 15.

[0053] The second step involves detaching one end of the counterweight mounting block 135 from the main boom 15 and connecting it to the movable pulley block 122. The other end of the counterweight mounting block 135 is then detached from the main boom 15, causing the counterweight mounting block 135 to separate from the main boom 15. Specifically, the first pin connecting the counterweight mounting block 135 to the main boom 15 is removed, and the movable pulley block 122 is connected to the counterweight mounting block 135 via the third pin. The second pin connecting the counterweight mounting block 135 to the main boom 15 is then removed, causing the counterweight mounting block 135 to separate from the main boom 15. This allows the main luffing mechanism 17 to wind up the rope, and the superlift mast 11 to rise away from the ground, preparing for the installation of the main boom 15 and the superlift luffing pulley block 12.

[0054] The third step involves raising the superlift mast 11, causing it to move away from the ground. Under the weight of the counterweight mounting block 135, the distance between the movable pulley block 122 and the fixed pulley block 121 increases. Specifically, after the main boom 15 is installed, the main luffing mechanism 17 releases rope, causing the superlift mast 11 to tilt forward. Simultaneously, the superlift luffing mechanism 18 releases rope, causing the movable pulley block 122 of the superlift luffing pulley block 12 to move away from the fixed pulley block 121, i.e., closer to the main boom 15. The counterweight mounting block 135 accelerates the descent speed of the movable pulley block 122. When the movable pulley block 122 descends to the middle position of the fourth section 151 of the main boom 15, the main luffing mechanism 17 stops releasing rope. Keeping the superlift mast 11 stationary, the superlift luffing mechanism 18 continues to release the rope until the counterweight mounting block 135 reaches the installation position of the fourth boom 151. Connect the end of the counterweight mounting block 135 away from the moving pulley block 122 to the main boom 15 via the second pin. Then, operate the superlift luffing mechanism 18 to continue releasing the rope, causing the counterweight mounting block 135 to rotate counterclockwise around the second pin. Remove the third pin, and connect the end of the counterweight mounting block 135 near the moving pulley block 122 to the main boom 15 via the first pin, so that the counterweight mounting block 135 is completely fixed to the main boom 15 and can be stored. Then, the superlift luffing mechanism 18 retracts the rope, raising the moving pulley block 122 slightly above the main boom 15.

[0055] The fourth step is to connect the movable pulley block 122 of the luffing pulley block 12 to the traction device. The traction device drives the movable pulley block 122 to move towards the pull plate assembly 14. Specifically, when the movable pulley block 122 descends into the range of the self-locking buckle, when the sensor detects that the movable pulley block 122 has entered the range of the self-locking buckle, the self-locking buckle engages with the movable pulley block 122 to achieve automatic connection, and the driver drives the movable pulley block 122 to move towards the pull plate assembly 14.

[0056] The fifth step is to connect the movable pulley block 122 to the pull plate assembly 14. Specifically, the lifting mechanism 136 winds up the rope, and the lifting wire rope 1361 pulls the movable pulley block 122 toward the pull plate assembly 14 until the movable pulley block 122 reaches the installation position of the pull plate assembly 14, and then connects the movable pulley block 122 to the pull plate assembly 14.

[0057] Third Embodiment

[0058] The tracked crane in this embodiment is structurally similar to the tracked crane in the first embodiment, except that the structure of the traction device is different.

[0059] Specifically, the traction device includes a first winch and a fourth guide wheel 134. The fourth guide wheel 134 is connected to the main boom 15 and can be connected to the fourth section 151 or the fifth section 152 of the main boom 15. (Since the head of the pull plate assembly 14 is connected to the head of the main boom 15, after the head of the pull plate assembly 14 is straightened, the tail of the pull plate assembly 14 is located near the fourth section 151 or the fifth section 152. Therefore, setting the fourth guide wheel 134 on the fourth section 151 or the fifth section 152 allows the first winch to...) The first wire rope of the winch pulls the movable pulley block 122 from the vertical downward position to the right to the tail of the pull plate assembly 14 and connects to it. The first winch is located between the turntable 16 of the crawler crane and the fourth pulley 134. The movable pulley block 122 is located between the first winch and the fourth pulley 134. The first wire rope of the first winch passes around the fourth pulley 134 and connects to the movable pulley block 122. Tightening the first wire rope can drive the movable pulley block 122 to move closer to the pull plate assembly 14.

[0060] In another preferred embodiment, the traction device includes a second winch and a fourth pulley 134. The fourth pulley 134 is connected to the main boom 15 and can be connected to the fourth boom section 151 or the fifth boom section 152 of the main boom 15. The second winch is located at one end of the main boom 15 near the pull plate assembly 14. The fourth pulley 134 is located between the movable pulley block 122 and the second winch. The second wire rope of the second winch passes around the fourth pulley 134 and is connected to the movable pulley block 122. When the second wire rope is tightened, it can drive the movable pulley block 122 to move towards the pull plate assembly 14.

[0061] The present invention also relates to a method of using a crawler crane, the method comprising:

[0062] The first step is to move the movable pulley block 122 of the superlift luffing pulley block 12 towards the main boom 15; that is, first lower the superlift mast 11 towards the ground so that the movable pulley block 122 of the superlift luffing mechanism 18 is close to the counterweight mounting block 135 of the main boom 15.

[0063] The second step involves detaching one end of the counterweight mounting block 135 from the main boom 15 and connecting it to the movable pulley block 122. The other end of the counterweight mounting block 135 is then detached from the main boom 15, causing the counterweight mounting block 135 to separate from the main boom 15. Specifically, the first pin connecting the counterweight mounting block 135 to the main boom 15 is removed, and the movable pulley block 122 is connected to the counterweight mounting block 135 via the third pin. The second pin connecting the counterweight mounting block 135 to the main boom 15 is then removed, causing the counterweight mounting block 135 to separate from the main boom 15. This allows the main luffing mechanism 17 to wind up the rope, and the superlift mast 11 to rise away from the ground, preparing for the installation of the main boom 15 and the superlift luffing pulley block 12.

[0064] The third step involves raising the superlift mast 11, causing it to move away from the ground. Under the weight of the counterweight mounting block 135, the distance between the movable pulley block 122 and the fixed pulley block 121 increases. Specifically, after the main boom 15 is installed, the main luffing mechanism 17 releases rope, causing the superlift mast 11 to tilt forward. Simultaneously, the superlift luffing mechanism 18 releases rope, causing the movable pulley block 122 of the superlift luffing pulley block 12 to move away from the fixed pulley block 121, i.e., closer to the main boom 15. The counterweight mounting block 135 accelerates the descent speed of the movable pulley block 122. When the movable pulley block 122 descends to the middle position of the fourth section 151 of the main boom 15, the main luffing mechanism 17 stops releasing rope. Keeping the superlift mast 11 stationary, the superlift luffing mechanism 18 continues to release the rope until the counterweight mounting block 135 reaches the installation position of the fourth boom 151. Connect the end of the counterweight mounting block 135 away from the moving pulley block 122 to the main boom 15 via the second pin. Then, operate the superlift luffing mechanism 18 to continue releasing the rope, causing the counterweight mounting block 135 to rotate counterclockwise around the second pin. Remove the third pin, and connect the end of the counterweight mounting block 135 near the moving pulley block 122 to the main boom 15 via the first pin, so that the counterweight mounting block 135 is completely fixed to the main boom 15 and can be stored. Then, the superlift luffing mechanism 18 retracts the rope, raising the moving pulley block 122 slightly above the main boom 15.

[0065] Fourth step: Connect the movable pulley block 122 of the luffing pulley block 12 to the traction device. The traction device drives the movable pulley block 122 to move towards the pull plate assembly 14. Specifically, the movable pulley block 122 is located between the first winch and the fourth guide pulley 134. The first wire rope of the first winch passes around the fourth guide pulley 134 and connects to the movable pulley block 122. Tightening the first wire rope can drive the movable pulley block 122 to move towards the pull plate assembly 14. Alternatively, the fourth guide pulley 134 is located between the movable pulley block 122 and the winch. The second wire rope of the second winch passes around the fourth guide pulley 134 and connects to the movable pulley block 122. When the second wire rope is tightened, it can drive the movable pulley block 122 to move towards the pull plate assembly 14.

[0066] The fifth step is to connect the movable pulley block 122 to the pull plate assembly 14. Specifically, the lifting mechanism 136 winds up the rope, and the lifting wire rope 1361 pulls the movable pulley block 122 toward the pull plate assembly 14 until the movable pulley block 122 reaches the installation position of the pull plate assembly 14, and then connects the movable pulley block 122 to the pull plate assembly 14.

[0067] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A crawler crane, characterized in that, The system includes a superlift mast (11), a superlift luffing pulley block (12), a traction device, a pull plate assembly (14), and a main boom (15). The superlift luffing pulley block (12) includes a fixed pulley block (121) and a movable pulley block (122) connected to the fixed pulley block (121). The movable pulley block (122) can move towards or away from the fixed pulley block (121). The fixed pulley block (121) is fixedly connected to the end of the superlift mast (11). The pull plate assembly (14) is connected to the main boom (15) and is located at one end of the main boom (15) away from the turntable (16) of the crawler crane. The traction device is connected to the movable pulley block (122) and drives the movable pulley block (122) to move towards the pull plate assembly (14). The traction device includes a lifting mechanism (136), a first idler wheel (131), a second idler wheel (132), a third idler wheel (133), and a fourth idler wheel (134). The lifting mechanism (136) is mounted on the turntable (16) of the crawler crane. The first idler wheel (131) and the second idler wheel (132) are arranged opposite to each other. The first guide wheel (131) is located at one end of the super-lift mast (11) near the fixed pulley block (121), and the second guide wheel (132) is located at one end of the super-lift mast (11) near the turntable (16). The third guide wheel (133) and the fourth guide wheel (134) are respectively connected to the main arm (15), and the third guide wheel (133) and the fourth guide wheel (134) are spaced apart along the length direction of the main arm (15). The hoisting wire rope (1361) of the hoisting mechanism (136) is arranged to pass sequentially around the first spool (131), the end of the super-lift mast (11), the second spool (132), the third spool (133), and the fourth spool (134). When the movable pulley block (122) is lowered, it is located between the third pulley (133) and the fourth pulley (134). The end of the lifting wire rope (1361) is connected to the movable pulley block (122). When the lifting wire rope (1361) is tightened, it can drive the movable pulley block (122) to move towards the pull plate assembly (14), so that the movable pulley block (122) is connected to the pull plate assembly (14).

2. The crawler crane as described in claim 1, characterized in that, The traction device includes a drive mechanism connected to the main arm (15). After the movable pulley group (122) is connected to the drive mechanism, the drive mechanism can drive the movable pulley group (122) to move towards the pull plate assembly (14).

3. The crawler crane as described in claim 2, characterized in that, The drive mechanism includes a sensor and a self-locking buckle. The self-locking buckle is electrically connected to the sensor. When the sensor detects that the movable pulley group (122) enters the range of the self-locking buckle, the self-locking buckle engages with the movable pulley group (122) to achieve automatic connection.

4. The crawler crane as described in claim 1, characterized in that, The traction device includes a first winch and a fourth pulley (134). The fourth drive wheel (134) is connected to the main arm (15). The first winch is positioned between the turntable (16) of the crawler crane and the fourth idler wheel (134). When the movable pulley block (122) is lowered, it is located between the first winch and the fourth pass pulley (134). The first wire rope of the first winch passes around the fourth pass pulley (134) and connects to the movable pulley block (122). Tightening the first wire rope can drive the movable pulley block (122) to move towards the pull plate assembly (14). Alternatively, the traction device may include a second winch and a fourth pulley (134), the fourth pulley (134) being connected to the main boom (15), the second winch being disposed at one end of the main boom (15) near the pull plate assembly (14), the fourth pulley (134) being disposed between the movable pulley block (122) and the second winch, the second wire rope of the second winch passing around the fourth pulley (134) and being connected to the movable pulley block (122), and when the second wire rope is tightened, it can drive the movable pulley block (122) to move toward the pull plate assembly (14).

5. The crawler crane as described in claim 1 or 4, characterized in that, The main boom (15) includes an upper chord (1511), a lower chord (1512), and a vertical pole (1513). The upper chord (1511) and the lower chord (1512) are arranged opposite to each other. The vertical pole (1513) is fixedly connected between the upper chord (1511) and the lower chord (1512). One end of the fourth guide wheel (134) is fixedly connected to the upper chord (1511). When the other end of the fourth guide wheel (134) is connected to the vertical pole (1513), the fourth guide wheel (134) is located inside the main boom (15). When the other end of the fourth guide wheel (134) is connected to the upper chord (1511), the fourth guide wheel (134) is located on the surface of the upper chord (1511). The hoisting wire rope (1361), the first wire rope, or the second wire rope can be arranged around the fourth guide wheel (134).

6. The crawler crane as described in any one of claims 1 to 4, characterized in that, The traction device includes a counterweight mounting block (135), which is detachably connected to the main boom (15). When the movable pulley group (122) is connected to the counterweight mounting block (135), the counterweight mounting block (135) is disassembled from the main boom (15). The movable pulley group (122) can move away from the fixed pulley group (121) under the gravity of the counterweight mounting block (135). When the movable pulley group (122) moves to the same horizontal plane as the upper chord (1511) of the main boom (15), the counterweight mounting block (135) is connected to the main boom (15), and the counterweight mounting block (135) is disassembled from the movable pulley group (122).

7. The crawler crane as described in claim 6, characterized in that, Before the counterweight mounting block (135) is connected to the movable pulley group (122), it is installed on the fourth section of the main boom (15) (151); after the counterweight mounting block (135) is disassembled from the movable pulley group (122), it is installed on the fourth section of the main boom (15) (151).

8. A method of using a crawler crane according to any one of claims 1 to 7, characterized in that, The method of use includes: Move the movable pulley block (122) of the super-lift luffing pulley block (12) toward the main boom (15); The hoisting wire rope (1361) of the hoisting mechanism (136) is arranged to pass through the first pass wheel (131), the end of the super-lift mast (11), the second pass wheel (132), the third pass wheel (133) and the fourth pass wheel (134) in sequence; Connect one end of the movable pulley block (122) of the super-lift luffing pulley block (12) to the hoisting wire rope (1361), and the hoisting mechanism (136) tightens the hoisting wire rope (1361) so that the hoisting wire rope (1361) pulls the movable pulley block (122) towards the connection point of the pull plate assembly (14); Connect the movable pulley block (122) to the pull plate assembly (14).

9. The method of using the crawler crane as described in claim 8, characterized in that, Before the movable pulley block (122) is connected to the traction device, First, lower the superlift mast (11) towards the ground so that the movable pulley block (122) of the superlift luffing pulley block (12) is close to the counterweight mounting block (135) of the main boom (15). Disconnect one end of the counterweight mounting block (135) from the main arm (15) and connect it to the movable pulley group (122); The other end of the counterweight mounting block (135) is detached from the main arm (15) so that the counterweight mounting block (135) is separated from the main arm (15). Raising the superlift mast (11) causes the superlift mast (11) to move away from the ground, and the distance between the movable pulley block (122) and the fixed pulley block (121) increases under the gravity of the counterweight mounting block (135).

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