A windproof tower crane

Abstract

The invention relates to the technical field of cranes, and discloses a windproof tower crane, comprising a tower body, a jacking mechanism sleeved on the top of the side of the tower body, and a windproof mechanism, the windproof mechanism consisting of a fixed frame and four cable mechanisms, the fixed frame is fixedly connected to the bottom of the side wall of the jacking mechanism, the cable mechanism is used to tighten the surrounding of the fixed frame to enhance the stability of the tower body; the cable mechanism consists of a hoisting mechanism, a switch-type guide pulley, a one-way pulley, and a counterweight, the hoisting mechanism is installed on the ground around the tower body and is wound with a steel rope, the switch-type guide pulley is arranged at the bottom of the side wall of the tower body, the one-way pulley is installed on the top of the fixed frame, the steel rope bypasses the switch-type guide pulley vertically upward and bypasses the one-way pulley vertically downward to be connected to the counterweight; the invention adds a windproof mechanism on the basis of the original tower crane, and through the four cable mechanisms of the structure, a downward oblique traction force can be formed on the surrounding of the tower body, thereby improving the overall stability of the tower crane and avoiding tipping due to strong wind.

Description

Technical Field

[0001] The present invention relates to the technical field of cranes, and more particularly to a windproof tower crane. Background Art

[0002] As a commonly used lifting equipment, tower cranes are widely used in construction sites, port terminals and other engineering construction. Its main function is to lift and transport heavy objects at the construction site. It has the advantages of improving work efficiency and reducing human resources. However, there are certain risks in the use of tower cranes, especially in severe weather conditions, such as typhoons and other strong winds. Tower cranes may be severely affected by wind, resulting in equipment damage or even overturning, which in turn threatens the safety of personnel and equipment at the construction site.

[0003] Existing wind protection measures include setting up safety areas around tower cranes, conducting daily inspections and maintenance, clarifying the weight and size of the lifting objects, and formulating operating procedures. However, these measures may still not be sufficient to ensure the stability of tower cranes in the face of extreme weather conditions, especially strong winds. Therefore, a more effective wind protection measure is needed to improve the wind resistance of tower cranes. Summary of the invention

[0004] In order to overcome the above defects of the prior art, the present invention provides a windproof tower crane to solve the problem that the traditional existing tower crane in the above background technology lacks an effective wind-resistant mechanism to ensure the stability of the tower crane in extremely strong wind weather.

[0005] The present invention provides the following technical solution: a windproof tower crane, comprising a tower body, a jacking mechanism is sleeved on the top of the circumference of the tower body, and the windproof mechanism comprises a fixed frame and four cable mechanisms, the fixed frame is fixedly connected to the bottom of the side wall of the jacking mechanism, and the cable mechanism is used to tighten the surrounding of the fixed frame to improve the stability of the tower body;

[0006] The cable mechanism is composed of a winch mechanism, a switch-type guide pulley, a one-way pulley, and a counterweight. The winch mechanism is installed on the ground around the tower body and is wound with a steel rope. The switch-type guide pulley is arranged at the bottom end of the tower body side wall. The one-way pulley is installed on the top of the fixed frame. The steel rope passes over the switch-type guide pulley vertically upward and passes over the one-way pulley vertically downward to connect with the counterweight.

[0007] The switch-type guide pulley is used to limit the steel rope from being close to the ground and running along the side wall of the tower body. When the switch-type guide pulley is in the open state, the steel rope is disconnected from the switch-type guide pulley.

[0008] Furthermore, a wire groove extending to the bottom of the one-way pulley is opened on the circumference of the fixed frame, and the steel rope passes through the wire groove. A positioning pulley is fixedly installed in the wire groove, and the positioning pulley is used to limit the force direction of the one-way pulley.

[0009] Furthermore, the switch-type guide pulley includes a base, a slide groove is arranged on the top of the base, a swivel shaft is rotatably sleeved in the slide groove, two moving blocks are slidably sleeved in the slide groove, two threads with opposite rotation directions are arranged on the side wall of the swivel shaft, the two moving blocks are respectively threadedly sleeved at the two threads of the swivel shaft, the tops of the two moving blocks are fixedly connected with vertical arms, the inner sides of the two vertical arms are movably sleeved with half wheels, the two half wheels are combined to form a complete guide pulley, and a motor 1 is installed on the side wall of the base, and the output shaft of the motor 1 is connected to one end of the swivel shaft.

[0010] Furthermore, the hoisting mechanism includes two vertical plates, the inner side surfaces of the two vertical plates are rotatably sleeved with rollers, the side walls of the rollers are fixedly connected to rope winding drums, the outer side surfaces of the two vertical plates are fixedly connected to torque pressure arms, the ends of the inner side surfaces of the two torque pressure arms are fixedly connected to connecting rods, the side walls of the connecting rods are movably sleeved with pressure wheels, the pressure wheels are used to press down the steel rope, one end of the roller passes through the roller and the torque pressure arm and is connected to a power mechanism.

[0011] Furthermore, the torque pressure arm includes a fixed plate, which is fixedly connected to the side wall of the vertical plate, and the side wall of the fixed plate is movably sleeved with a rotary sleeve. The fixed plate is transmission-connected to the rotary sleeve through a torsion spring, and the side wall of the rotary sleeve is fixedly connected to the main arm plate.

[0012] Furthermore, the power mechanism includes a passive pulley, a driving pulley, a fixed shaft, and two side plates. The passive pulley is fixedly connected to one end of the rotating roller, the inner cavity of the driving pulley is rotatably sleeved with a fixed shaft, one end of the fixed shaft is fixedly connected to the side wall of the vertical plate, the driving pulley is transmission-connected to the passive pulley through a transmission belt, the two side plates are fixedly installed on the ground, the inner side surfaces of the two side plates are rotatably sleeved with a worm, one side of the driving pulley is fixedly connected with a worm wheel, the worm wheel is meshed with the worm, and the side wall of the side plate is fixedly installed with a second motor, and the output end of the second motor is connected to the side plate.

[0013] Furthermore, the connecting rod includes a main rod body and a hanging ring. The side wall of the main rod body is movably sleeved with a rotating ring. The bottom of the rotating ring is fixedly connected with a hook, and the hook is hooked on the hanging ring.

[0014] Furthermore, an extension arm is fixedly connected to one side of the rotating ring, and a lever is fixedly connected to the end of the extension arm.

[0015] Furthermore, the one-way pulley includes an outer shell, a main wheel is rotatably sleeved inside the outer shell, a side wheel is arranged on one side of the main wheel, the side wheel is rotatably sleeved inside the outer shell, and two torsion springs are arranged at the connection point, a broken surface protrusion is arranged on the side wall of the side wheel, and the side wall of the broken surface protrusion is arranged with teeth, a plurality of damping wheel groups are arranged inside the outer shell, the steel rope passes around the side wall of the main wheel and passes through the plurality of damping wheel groups, and the steel rope is in meshing contact with the teeth on the side wall of the broken surface protrusion.

[0016] Furthermore, the damping wheel assembly is composed of two clamping wheels, both ends of which are connected to the inner wall of the shell through a damping shaft, the steel rope passes between the two clamping wheels, and the steel rope is tightly fitted to the side walls of the two clamping wheels.

[0017] Technical effects and advantages of the present invention:

[0018] The present invention adds a windproof mechanism on the basis of the original tower crane. Through the four cable mechanisms of the structure, a downward oblique traction force can be formed on the four sides of the tower body, thereby improving the overall stability of the tower crane and avoiding tipping due to strong winds, thereby achieving a windproof effect. The cable mechanism is structurally set to enable the crane to switch its form. In the initial state, the steel rope can be placed close to the ground and the side wall of the tower body, without occupying the space around the tower body to avoid interference with the lifting operation. After the form is changed, the stability of the tower body is reinforced to improve the wind resistance.

[0019] On the basis of the above, the winch mechanism of the cable mechanism is improved in structure. By setting a torque pressure arm, a connecting rod and a pressure wheel, the pressure wheel can press the steel rope downward under the torque of the torque pressure arm, so as to avoid the increase in the height of the steel rope contacting the ground due to the reduction in the circle diameter of the wound part of the steel rope and the increase in the height above the ground, which may affect pedestrians and mobile equipment. In addition, the torque effect of the torque pressure arm can also have a damping effect on the instantaneously tightened steel rope, so as to avoid the instantaneous tension of the steel rope being too large to damage the winch mechanism.

[0020] The structure of the connecting rod has also been improved. Under the locking action of the hook and the hanging ring, the height of the connecting rod can be positioned to prevent the pressure wheel from being unable to tighten the steel rope due to excessive lifting force. In addition, by setting a rotating ring, an extension arm, and a lever, the hook and the hanging ring can be automatically unlocked by the change in the shape of the steel rope when the cable mechanism changes state, ensuring the damping effect of the torque pressure arm on the steel rope. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a schematic diagram of the windproof mechanism structure of the present invention;

[0023] Figure 3 For the present invention Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 4 For the present invention Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 5 For the present invention Figure 2 Explosion diagram of the switch guide pulley structure;

[0026] Figure 6 For the present invention Figure 2 Explosion diagram of the winch structure;

[0027] Figure 7 For the present invention Figure 6 Schematic diagram of the power mechanism structure;

[0028] Figure 8 For the present invention Figure 6 Schematic diagram of the connecting rod structure;

[0029] Fig. 9 For the present invention Figure 4 Schematic diagram of the cross-sectional structure of the one-way pulley.

[0030] The accompanying drawings are marked as follows: 1, tower body; 2, lifting mechanism; 3, fixed frame; 4, winch mechanism; 5, switch guide pulley; 6, one-way pulley; 7, steel rope; 8, counterweight; 9, positioning pulley; 51, base; 52, rotating shaft; 53, moving block; 54, vertical arm; 55, half wheel; 56, motor 1; 41, vertical plate; 42, rotating roller; 43, rope reel; 44, power mechanism; 45, torque pressure arm; 46, connecting rod; 47, pressure wheel; 451, fixed plate; 452, rotating sleeve; 453 , torsion spring one; 454, main arm plate; 441, passive pulley; 442, driving pulley; 443, fixed shaft; 444, worm wheel; 445, worm; 446, side plate; 447, motor two; 461, main rod body; 462, rotating ring; 463, hook; 464, extension arm; 465, lever; 466, hanging ring; 61, outer shell; 62, main wheel; 63, side wheel; 64, torsion spring two; 65, broken surface protrusion; 66, damping wheel group; 661, clamping wheel; 662, damping shaft. DETAILED DESCRIPTION

[0031] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0032] Reference Figure 1-Figure 3The present invention provides a windproof tower crane, comprising a tower body 1, a lifting mechanism 2 is sleeved on the top of the side of the tower body 1, and the windproof mechanism is composed of a fixed frame 3 and four cable mechanisms. The fixed frame 3 is fixedly connected to the bottom of the side wall of the lifting mechanism 2, and the cable mechanism is used to tighten the four sides of the fixed frame 3 to enhance the stability of the tower body 1; the cable mechanism is composed of a hoisting mechanism 4, a switch-type guide pulley 5, a one-way pulley 6, and a counterweight 8. The hoisting mechanism 4 is installed on the ground around the side of the tower body 1 and is wound with a steel rope 7. The switch-type guide pulley 5 is arranged at the bottom end of the side wall of the tower body 1, and the one-way pulley 6 is installed on the top of the fixed frame 3. The steel rope 7 bypasses the switch-type guide pulley 5 vertically upward and bypasses the one-way pulley 6 vertically downward to be connected to the counterweight 8; the switch-type guide pulley 5 is used to limit the steel rope 7 to be close to the ground and the side wall of the tower body 1. When the switch-type guide pulley 5 is opened, the steel rope 7 is disconnected from the switch-type guide pulley 5.

[0033] When the tower crane is in normal operation, the steel rope 7 is restricted in its direction by the switch-type guide pulley 5, so that it is laid along the ground and close to the tower body 1 from the hoisting mechanism 4 to the counterweight block 8, which can avoid the steel rope 7 from interfering with the lifting operation. In strong wind weather, the switch-type guide pulley 5 is opened to disconnect it from the steel rope 7. At this time, the steel rope 7 loses the guiding restriction of the switch-type guide pulley 5, and the end of the steel rope 7 is pulled downward under the gravity of the counterweight block 8. At this time, the steel rope 7 is pulled into a straight line from the hoisting mechanism 4 to the one-way pulley 6, so that the cable mechanism quickly completes the shape transformation, forming a tightening effect on the tower body 1 obliquely downward, and the four cable mechanisms work together to strengthen the stability of the tower body 1, thereby enhancing the wind resistance of the tower crane and avoiding tilting and collapse due to strong winds. Since the fixed frame 3 is connected to the jacking mechanism 2, the traction end of the cable mechanism can be raised as the tower crane is built.

[0034] Reference Figure 4 A wire groove extending to the bottom of the one-way pulley 6 is opened on the side of the fixed frame 3, and the steel rope 7 passes through the wire groove. A positioning pulley 9 is fixedly installed in the wire groove. The positioning pulley 9 is used to limit the force direction of the one-way pulley 6.

[0035] When the cable mechanism changes its form, the steel rope 7 will generate a downward pulling force on the one-way pulley 6. At this time, the connecting parts between the one-way pulley 6 and the fixed frame 3 will be subjected to a large force and easily damaged. By setting a positioning pulley 9, when the cable mechanism changes its form, the steel rope 7 is attached to the positioning pulley 9. At this time, the section of the steel rope 7 from the positioning pulley 9 to the one-way pulley 6 is restricted to a vertical state. The one-way pulley 6 is only subjected to a vertical downward force, and the fixed frame 3 is supported by the one-way pulley 6, and its connecting parts will not be subjected to excessive force and damaged.

[0036] Reference Figure 5The switch type guide pulley 5 includes a base 51, a slide groove is arranged on the top of the base 51, a swivel shaft 52 is rotatably sleeved in the slide groove, two moving blocks 53 are slidably sleeved in the slide groove, two threads with opposite rotation directions are arranged on the side wall of the swivel shaft 52, the two moving blocks 53 are respectively threadedly sleeved at the two threads of the swivel shaft 52, the tops of the two moving blocks 53 are fixedly connected with vertical arms 54, the inner sides of the two vertical arms 54 are movably sleeved with half wheels 55, and the two half wheels 55 are combined to form a complete guide pulley, and a motor 56 is installed on the side wall of the base 51, and the output shaft of the motor 56 is connected to one end of the swivel shaft 52.

[0037] When the switch guide pulley 5 is in a closed state, the steel rope 7 is guided by passing around the complete guide pulley formed by the two half wheels 55, and the motor 56 is used to drive the rotary shaft 52 to rotate. Under the action of two threads with opposite rotation directions, the two moving blocks 53 can be shifted in opposite directions. By controlling the two moving blocks 53 to gradually move away from each other, a gap can be formed between the two half wheels 55, so that the switch guide pulley 5 is in an open state. At this time, the steel rope 7 can pass between the two half wheels 55, so that the switch guide pulley 5 and the steel rope 7 are disconnected.

[0038] Reference Figure 6 The hoisting mechanism 4 includes two vertical plates 41, and the inner side surfaces of the two vertical plates 41 are rotatably sleeved with a rotary roller 42, and the side walls of the rotary roller 42 are fixedly connected to a rope winding drum 43, and the outer sides of the two vertical plates 41 are fixedly connected to a torque pressure arm 45, and the ends of the inner side surfaces of the two torque pressure arms 45 are fixedly connected to a connecting rod 46, and the side walls of the connecting rod 46 are movably sleeved with a pressure wheel 47, and the pressure wheel 47 is used to press down the steel rope 7, and one end of the rotary roller 42 passes through the rotary roller 42 and the torque pressure arm 45 and is connected to a power mechanism 44.

[0039] The steel rope 7 is wound on the rope drum 43. As the tower crane builds the high hoisting mechanism 4 and unwinds it, the diameter of the steel rope 7 wound on the rope drum 43 is reduced, so that its height from the ground is increased. At this time, the height of the part of the steel rope 7 that is close to the ground will increase, which may easily interfere with pedestrians or mobile equipment on the side of the tower body 1. By providing a torque pressure arm 45, a connecting rod 46, and a pressure wheel 47, a downward pressure effect can be formed on the part of the steel rope 7 that is close to the ground, thereby preventing the part of the steel rope 7 that is close to the ground from being too high from the ground; in addition, when the cable mechanism changes its form, the steel rope 7 will be quickly straightened under the action of the counterweight block 8. At this time, the steel rope 7 will cause a large instantaneous pulling force on the hoisting mechanism 4, which may easily cause damage to the parts of the hoisting mechanism 4. By providing the torque pressure arm 45, when the steel rope 7 is quickly straightened, the steel rope 7 generates an upward lifting force on the torque pressure arm 45, and the torque of the torque pressure arm 45 slowly flips upward, thereby generating a damping effect on the steel rope 7, thereby preventing the hoisting mechanism 4 from being damaged.

[0040] Reference Figure 6The torque pressure arm 45 includes a fixed plate 451, which is fixedly connected to the side wall of the vertical plate 41. The side wall of the fixed plate 451 is movably sleeved with a rotary sleeve 452. The fixed plate 451 is transmission-connected to the rotary sleeve 452 through a torsion spring 453, and the side wall of the rotary sleeve 452 is fixedly connected with a main arm plate 454.

[0041] Through the connection between the fixed disk 451 and the rotating sleeve 452, when the torque pressure arm 45 turns upward, a torque is generated under the action of the torsion spring 1 453, so that the torque pressure arm 45 drives the pressure wheel 47 to press the steel rope 7 downward.

[0042] Reference Figure 7 The power mechanism 44 includes a passive pulley 441, a driving pulley 442, a fixed shaft 443, and two side plates 446. The passive pulley 441 is fixedly connected to one end of the rotating roller 42. The inner cavity of the active pulley 442 is rotatably sleeved with a fixed shaft 443. One end of the fixed shaft 443 is fixedly connected to the side wall of the vertical plate 41. The active pulley 442 is transmission-connected to the passive pulley 441 through a transmission belt. The two side plates 446 are fixedly installed on the ground. A worm 445 is rotatably sleeved on the inner side surfaces of the two side plates 446. A worm wheel 444 is fixedly connected to one side of the active pulley 442. The worm wheel 444 is meshed with the worm 445. A motor 2 447 is fixedly installed on the side wall of the side plate 446. The output end of the motor 2 447 is connected to the side plate 446.

[0043] The output of motor 2 447 drives the worm 445 to rotate, and the active pulley 442 can be rotated under the meshing effect of the worm 445 and the worm wheel 444. Since the active pulley 442 and the passive pulley 441 are driven by the transmission belt, the passive pulley 441 can follow the rotation and drive the rotating roller 42 to rotate to unwind and reel the steel rope 7. The characteristics of the worm 445 and the worm wheel 444 can achieve a one-way locking effect, thereby preventing the steel rope 7 from being passively unwound by traction.

[0044] Reference Figure 8 The connecting rod 46 includes a main rod body 461 and a hanging ring 466 . A rotating ring 462 is movably sleeved on the side wall of the main rod body 461 . A hook 463 is fixedly connected to the bottom of the rotating ring 462 . The hook 463 is hooked on the hanging ring 466 .

[0045] Although the pressure wheel 47 has a downward pressing effect on the portion of the steel rope 7 that is close to the ground, when the diameter of the winding circle of the steel rope 7 on the rope drum 43 is reduced, the section from the rope drum 43 to the pressure wheel 47 will produce an oblique upward lifting force on the pressure wheel 47. When the lifting force is too large, the torque pressure arm 45 will be twisted to increase the height of the pressure wheel 47. At this time, the portion of the steel rope 7 that is close to the ground will still rise. Therefore, a hanging ring 466 is provided to form a connection with the hook 463. At this time, a locking effect is formed on the height of the connecting rod 46, thereby preventing the pressure wheel 47 from rising due to the lifting force from the section from the rope drum 43 to the pressure wheel 47.

[0046] Reference Figure 8 An extension arm 464 is fixedly connected to one side of the rotating ring 462 , and a lever 465 is fixedly connected to the end of the extension arm 464 .

[0047] When the switch guide pulley 5 is in the open state, the section of the steel rope 7 from the winch mechanism 4 to the one-way pulley 6 is quickly straightened. At this time, this section is lifted obliquely to lift the lever 465. At this time, the rotating ring 462 can be rotated under the connection effect of the extension arm 464, so that the hook 463 is automatically unhooked from the hanging ring 466, thereby forming a height limit for the connecting rod 46 and achieving an automatic unlocking effect.

[0048] Reference Fig. 9 The one-way pulley 6 includes an outer shell 61, a main wheel 62 is rotatably sleeved inside the outer shell 61, a side wheel 63 is arranged on one side of the main wheel 62, the side wheel 63 is rotatably sleeved inside the outer shell 61, and a torsion spring 64 is arranged at the connection point, a broken surface protrusion 65 is arranged on the side wall of the side wheel 63, and a meshing tooth is arranged on the side wall of the broken surface protrusion 65, and a plurality of damping wheel groups 66 are arranged inside the outer shell 61, and the steel rope 7 passes around the side wall of the main wheel 62 and passes through the plurality of damping wheel groups 66, and the steel rope 7 is in meshing contact with the side wall of the broken surface protrusion 65.

[0049] When the steel rope 7 is pulled and slides by the counterweight 8, the broken surface protrusion 65 can be pushed under the influence of the friction between the steel rope 7 and the meshing teeth. At this time, the side wheel 63 rotates to make the broken surface protrusion 65 move away from the direction of the steel rope 7, which has no effect on the sliding of the steel rope 7. When the steel rope 7 slides in the opposite direction, under the influence of friction, the broken surface protrusion 65 moves toward the direction of the steel rope 7 to press and lock the steel rope 7, thereby realizing the unidirectional sliding effect of the one-way pulley 6. The sliding speed of the steel rope 7 is slowed down by a plurality of damping wheel groups 66 to prevent the instantaneous tension generated by the excessive speed of the steel rope 7 being pulled by the counterweight 8 from damaging the hoisting mechanism 4.

[0050] Reference Fig. 9 The damping wheel assembly 66 is composed of two clamping wheels 661, both ends of which are connected to the inner wall of the shell 61 through a damping shaft 662, and the steel rope 7 passes between the two clamping wheels 661, and the steel rope 7 is tightly fitted to the side walls of the two clamping wheels 661.

[0051] When the steel rope 7 slides, the two clamping wheels 661 rotate under the influence of friction. The rotation speed of the clamping wheels 661 can be limited under the action of the damping shaft 662. At this time, the sliding speed of the steel rope 7 is limited by the two clamping wheels 661, thereby achieving a damping effect.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. The present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A windproof tower crane, comprising a tower body (1), wherein a jacking mechanism (2) is sleeved on the top of the circumference of the tower body (1), and characterized in that: It comprises a windproof mechanism, the windproof mechanism comprising a fixed frame (3) and four cable mechanisms, the fixed frame (3) is fixedly connected to the bottom of the side wall of the jacking mechanism (2), and the cable mechanisms are used to tighten the surroundings of the fixed frame (3) to enhance the stability of the tower body (1); The cable pulling mechanism is composed of a winch mechanism (4), a switchable guide pulley (5), a one-way pulley (6), and a counterweight (8); the winch mechanism (4) is installed on the ground around the tower body (1) and is wound with a steel rope (7); the switchable guide pulley (5) is arranged at the bottom end of the side wall of the tower body (1); the one-way pulley (6) is installed on the top of the fixed frame (3); the steel rope (7) passes around the switchable guide pulley (5) vertically upward and passes around the one-way pulley (6) vertically downward to be connected to the counterweight (8); The switchable guide pulley (5) is used to restrict the steel rope (7) from being routed close to the ground and along the side wall of the tower body (1); when the switchable guide pulley (5) is in the open state, the steel rope (7) is disconnected from the switchable guide pulley (5).

2. A windproof tower crane according to claim 1, characterized in that: The fixed frame (3) is provided with a wire groove extending to the bottom of the one-way pulley (6) on its circumference, the steel rope (7) passes through the wire groove, and a positioning pulley (9) is fixedly installed in the wire groove, the positioning pulley (9) being used to limit the force direction of the one-way pulley (6).

3. A windproof tower crane according to claim 1, characterized in that: The switch type guide pulley (5) comprises a base (51), a slide groove is arranged on the top of the base (51), a rotating shaft (52) is rotatably sleeved in the slide groove, two moving blocks (53) are slidably sleeved in the slide groove, two threads with opposite rotation directions are arranged on the side wall of the rotating shaft (52), the two moving blocks (53) are respectively threadedly sleeved at the two threads of the rotating shaft (52), the tops of the two moving blocks (53) are fixedly connected with vertical arms (54), the inner sides of the two vertical arms (54) are movably sleeved with half wheels (55), and the two half wheels (55) are combined to form a complete guide pulley, and a motor 1 (56) is installed on the side wall of the base (51), and the output shaft of the motor 1 (56) is connected to one end of the rotating shaft (52).

4. A windproof tower crane according to claim 1, characterized in that: The hoisting mechanism (4) comprises two vertical plates (41), the inner side surfaces of the two vertical plates (41) are rotatably sleeved with a rotary roller (42), the side walls of the rotary roller (42) are fixedly connected with a rope winding drum (43), the outer side surfaces of the two vertical plates (41) are fixedly connected with a torque pressure arm (45), the inner side ends of the two torque pressure arms (45) are fixedly connected with a connecting rod (46), the side walls of the connecting rod (46) are movably sleeved with a pressure wheel (47), the pressure wheel (47) is used to press down the steel rope (7), and one end of the rotary roller (42) passes through the rotary roller (42) and the torque pressure arm (45) and is connected to a power mechanism (44).

5. A windproof tower crane according to claim 4, characterized in that: The torque pressure arm (45) comprises a fixed plate (451), the fixed plate (451) is fixedly connected to the side wall of the vertical plate (41), the side wall of the fixed plate (451) is movably sleeved with a rotary sleeve (452), the fixed plate (451) is transmission-connected to the rotary sleeve (452) via a torsion spring 1 (453), and the side wall of the rotary sleeve (452) is fixedly connected to a main arm plate (454).

6. A windproof tower crane according to claim 4, characterized in that: The power mechanism (44) comprises a passive pulley (441), a driving pulley (442), a fixed shaft (443), and two side plates (446); the passive pulley (441) is fixedly connected to one end of the rotating roller (42); the inner cavity of the active pulley (442) is rotatably sleeved with a fixed shaft (443); one end of the fixed shaft (443) is fixedly connected to the side wall of the vertical plate (41); the active pulley (442) is transmission-connected to the passive pulley (441) via a transmission belt; the two side plates (446) are fixedly installed on the ground; the inner surfaces of the two side plates (446) are rotatably sleeved with a worm (445); one side of the active pulley (442) is fixedly connected with a worm wheel (444); the worm wheel (444) meshes with the worm wheel (445); a second motor (447) is fixedly installed on the side wall of the side plate (446); the output end of the second motor (447) is connected to the side plate (446).

7. A windproof tower crane according to claim 4, characterized in that: The connecting rod (46) comprises a main rod body (461) and a hanging ring (466); a rotating ring (462) is movably sleeved on the side wall of the main rod body (461); a hook (463) is fixedly connected to the bottom of the rotating ring (462); and the hook (463) is hooked on the hanging ring (466).

8. A windproof tower crane according to claim 7, characterized in that: An extension arm (464) is fixedly connected to one side of the rotating ring (462), and a lever (465) is fixedly connected to the end of the extension arm (464).

9. The windproof tower crane according to claim 1, characterized in that: The one-way pulley (6) comprises a shell (61), a main wheel (62) is rotatably sleeved inside the shell (61), a side wheel (63) is arranged on one side of the main wheel (62), the side wheel (63) is rotatably sleeved inside the shell (61), and a second torsion spring (64) is arranged at the connection point, a broken surface protrusion (65) is arranged on the side wall of the side wheel (63), and a meshing tooth is arranged on the side wall of the broken surface protrusion (65), and a plurality of damping wheel groups (66) are arranged inside the shell (61), the steel rope (7) passes around the side wall of the main wheel (62) and passes through the plurality of damping wheel groups (66), and the steel rope (7) is in meshing contact with the side wall of the broken surface protrusion (65).

10. A windproof tower crane according to claim 9, characterized in that: The damping wheel assembly (66) is composed of two clamping wheels (661), both ends of which are connected to the inner wall of the housing (61) via a damping shaft (662), the steel rope (7) passes between the two clamping wheels (661), and the steel rope (7) is tightly fitted to the side walls of the two clamping wheels (661).

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