A tower crane lifting device with anti-fall structure

Abstract

The present invention discloses a tower crane lifting device with an anti-falling structure, comprising a device body, the device body comprising a tower crane body, a rotating shaft seat, a standard section, a supporting section and a rack, the bottom end of the tower crane body is rotatably connected to the rotating shaft seat, and the bottom end of the rotating shaft seat is fixedly connected to the top end of the supporting section, the bottom end of the supporting section is fixedly connected to multiple groups of standard sections, and a rack is provided on one side of the standard section, a fixed frame is provided on one side of the supporting section, the top of the fixed frame is fixedly connected to a fixed block on one side close to the supporting section, and the bottom end of the fixed frame is fixedly connected to a lifting block on one side close to the standard section, the fixed block is fixedly connected to the supporting section, and a locking mechanism is provided inside the fixed block, and the lifting block is slidably connected to the fixed frame. The present invention can limit the rotation of the top end of the tower crane during use to prevent the standard section from falling.

Description

Technical Field

[0001] The invention relates to the technical field of tower crane safety facilities, in particular to a tower crane lifting device with an anti-falling structure. Background Art

[0002] During the construction of high-rise buildings, tower cranes are needed to transport construction materials. As the height of the building increases, the tower crane also needs to increase its height accordingly. When people use the tower crane lifting device to increase the height of the tower crane, if the top of the tower crane rotates, the center of gravity of the tower crane may change, which will cause the tower crane to become unbalanced, seriously affecting the safety of the device. In addition, during the process of raising the tower crane, standard sections are needed to increase the height of its own supporting structure. The traditional method relies on simple clamping, and the standard sections are at risk of falling during use. Therefore, a tower crane lifting device with an anti-fall structure is urgently needed to solve the above problems. Summary of the invention

[0003] In view of the above problems, an object of the present invention is to provide a tower crane lifting device with an anti-falling structure.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tower crane lifting device with an anti-fall structure, comprising a device body, the device body comprising a tower crane body, a rotating shaft seat, a standard section, a supporting section and a rack, the bottom end of the tower crane body is rotatably connected to the rotating shaft seat, and the bottom end of the rotating shaft seat is fixedly connected to the top end of the supporting section, the bottom end of the supporting section is fixedly connected to multiple groups of standard sections, and a rack is provided on one side of the standard section, a fixing frame is provided on one side of the supporting section, and a fixing block is fixedly connected to the top end of the fixing frame close to the supporting section, and A lifting block is fixedly connected to one side of the bottom end of the fixed frame close to the standard section, the fixed block is fixedly connected to the supporting section, and a locking mechanism is arranged inside the fixed block, the lifting block is slidably connected to the fixed frame, and a lifting mechanism is arranged inside the lifting block, a transmission mechanism is arranged between the lifting block and the fixed block, an operating table is fixedly connected to one side of the fixed frame close to the standard section, and a fixing rod is arranged on the top of the operating table, the fixing rod is fixedly connected to the fixed frame, and a clamping seat is slidably connected to the bottom end of the fixing rod, and a clamping mechanism is arranged inside the clamping seat.

[0005] Preferably, the jacking mechanism includes a motor, a first bevel gear, a toothed disc, a first transmission belt, a first jacking gear, a second jacking gear and a second transmission belt, the inside of the jacking block is fixedly connected to the motor, and one end of the motor is fixedly connected to the first bevel gear, one side of the first bevel gear is meshed with the toothed disc, and the outside of the toothed disc is sleeved with a first transmission belt, the end of the first transmission belt away from the toothed disc is sleeved on the outside of the first jacking gear, the first jacking gear is rotatably connected to the top end of the inner wall of the jacking block close to the rack, and the bottom end of the jacking block close to the rack is rotatably connected to the second jacking gear, the outside of the first jacking gear and the second jacking gear are sleeved with a second transmission belt, and the first jacking gear and the second jacking gear are both meshed with the rack on one side away from the toothed disc.

[0006] Preferably, the transmission mechanism includes a bearing seat, a second bevel gear, a transmission rod and a third bevel gear, the inner wall of the lifting block is fixedly connected to the bearing seat, and the bearing seat and the bottom end of the transmission rod are rotatably connected, the bottom end of the transmission rod is fixedly connected to the second bevel gear, and the second bevel gear is meshed with the gear disk, and the top end of the transmission rod is fixedly connected to the third bevel gear.

[0007] Preferably, the locking mechanism includes a limit pin, a return spring, an adjusting rod, a moving block, a control rod, a locking gear and a fourth bevel gear, an adjusting rod is inlaid on one side of the fixed block, and the adjusting rod and the fixed block are rotatably connected, the adjusting rod extending to one end of the interior of the fixed block is threadedly connected to the moving block, and the moving block and the inner wall of the fixed block are slidably connected, the moving block is fixedly connected to the control rod at one end away from the adjusting rod, and the middle part of the control rod is fixedly connected to the locking gear, the locking gear is meshed with the limit pin, and the limit pin and the fixed block are slidably connected, a return spring is fixedly connected between the bottom end of the limit pin and the inner wall of the fixed block, the control rod is fixedly connected to the fourth bevel gear at one end away from the adjusting rod, and the fourth bevel gear is meshed with the third bevel gear, and a limit hole matching the limit pin is opened at the bottom end of the tower crane body.

[0008] Preferably, the clamping mechanism comprises a locking rod, a fifth bevel gear, a sixth bevel gear, a connecting rod and an embedding mechanism, the clamping seat is rotatably connected to a locking rod on one side close to the fixing frame, and the locking rod is fixedly connected to the fifth bevel gear at one end away from the fixing frame, the fifth bevel gear is meshed with two groups of sixth bevel gears, and the sixth bevel gear is fixedly connected to a connecting rod on one side away from the fifth bevel gear, and the two groups of connecting rods are fixedly connected to the embedding mechanism at one end away from the sixth bevel gear, and the embedding mechanism comprises two groups of sleeves, a third transmission belt and two groups of fixing pins, the connecting rod and one group of sleeves are fixedly connected, the two groups of sleeves are rotatably connected through bearings and the inner wall of the clamping seat, and the third transmission belt is sleeved on the outside of the two groups of sleeves, the interiors of the two groups of sleeves are threadedly connected with fixing pins, and the ends of the fixing pins away from the sleeves are embedded in the interior of the standard section, and the top of the standard section is engaged with the clamping seat.

[0009] Preferably, a stabilizing block is sleeved on the outside of the transmission rod, and the stabilizing block is rotatably connected to a groove provided inside the fixing block.

[0010] Preferably, the top and bottom ends of the moving block are fixedly connected with protrusions, and the insides of the protrusions are inlaid with balls.

[0011] Preferably, a guide groove is formed at one end of the fixing pin away from the sleeve, and the guide groove is slidably connected to a guide block, and the guide block is fixedly connected to the inside of the sixth bevel gear.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: by arranging a fixed frame, a lifting block, a second bevel gear, a fixed block and an adjusting rod, when the starting motor drives the lifting block and the fixed frame to move upward to lift the tower crane, the transmission of the second bevel gear and the adjusting rod can push the limit pin upward to embed into the inside of the limit hole, so that the tower crane body and the fixed block are limited, avoiding the tower crane body from rotating during the lifting process of the tower crane. Through this design, the safety and practicality of the device are improved, and the good linkage of the device is reflected.

[0013] By setting up a clamping seat and a sixth bevel gear, rotating the locking rod can drive the two sets of embedding mechanisms to embed into the interior of the standard section, so that when the standard section is clamped and fixed, the movement of the standard section in the vertical direction is restricted by using the fixing pin embedded in the interior of the standard section, thereby preventing the standard section from falling and improving the safety and practicality of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic front view of the structure of the present invention;

[0015] Figure 2 It is a schematic front view of the structure of the present invention in a jacking state;

[0016] Figure 3 It is a schematic side cross-sectional view of the partial structure of the tower crane body, standard section, lifting block and fixing block of the present invention;

[0017] Figure 4 For the present invention Figure 3 A schematic diagram of the structure enlargement in the middle;

[0018] Figure 5 For the present invention Figure 3 A magnified schematic diagram of the structure at B in the middle;

[0019] Figure 6 It is a schematic bottom view of the cross-section of the structure of the clamping seat and the sixth bevel gear of the present invention;

[0020] Figure 7 For the present invention Figure 6 Enlarged schematic diagram of the structure at point C in the middle.

[0021] In the figure: 100, device body; 110, tower crane body; 111, shaft seat; 112, limit hole; 120, standard section; 121, support section; 122, rack; 210, fixed frame; 211, operating table; 212, fixed rod; 220, lifting block; 221, motor; 222, first bevel gear; 223, toothed disc; 224, first transmission belt; 225, first lifting gear; 226, second lifting gear; 227, second transmission belt; 228, bearing seat; 230, second bevel gear; 23 1. Transmission rod; 232. Stabilizing block; 233. Third bevel gear; 240. Fixed block; 241. Limit pin; 242. Return spring; 250. Adjustment rod; 251. Moving block; 252. Control rod; 253. Locking gear; 254. Fourth bevel gear; 310. Clamping seat; 311. Locking rod; 312. Fifth bevel gear; 320. Sixth bevel gear; 321. Connecting rod; 322. Sleeve; 323. Third transmission belt; 324. Fixed pin; 325. Guide groove; 326. Guide block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-7 , an embodiment provided by the present invention:

[0024] A tower crane lifting device with an anti-fall structure includes a device body 100, the device body 100 includes a tower crane body 110, a rotating shaft seat 111, a standard section 120, a support section 121 and a rack 122, the bottom end of the tower crane body 110 is rotatably connected to the rotating shaft seat 111, and the bottom end of the rotating shaft seat 111 is fixedly connected to the top of the support section 121, a plurality of groups of standard sections 120 are fixedly connected to the bottom end of the support section 121, and a rack 122 is provided on one side of the standard section 120, a fixing frame 210 is provided on one side of the support section 121, a fixing block 240 is fixedly connected to the top of the fixing frame 210 near the support section 121, and a lifting block 220 is fixedly connected to the bottom end of the fixing frame 210 near the side of the standard section 120, and the fixing block 240 is fixedly connected to the support section 121 , and a locking mechanism is arranged inside the fixed block 240, the jacking block 220 and the fixed frame 210 are slidably connected, and a jacking mechanism is arranged inside the jacking block 220, a transmission mechanism is arranged between the jacking block 220 and the fixed block 240, an operating table 211 is fixedly connected to the side of the fixed frame 210 close to the standard section 120, and a fixing rod 212 is arranged on the top of the operating table 211, the fixing rod 212 and the fixed frame 210 are fixedly connected, and a clamping seat 310 is slidably connected to the bottom end of the fixing rod 212, and a clamping mechanism is arranged inside the clamping seat 310. Through this design, the rotation of the top of the tower crane is effectively avoided during the jacking process of the tower crane, and the clamped standard section can be prevented from falling, thereby improving the safety, practicality and convenience of the device, and reflecting the good linkage of the device.

[0025] The lifting mechanism includes a motor 221, a first bevel gear 222, a toothed disc 223, a first transmission belt 224, a first lifting gear 225, a second lifting gear 226 and a second transmission belt 227. The motor 221 is fixedly connected to the inside of the lifting block 220, and one end of the motor 221 is fixedly connected to the first bevel gear 222. One side of the first bevel gear 222 is meshed with the toothed disc 223, and the outer part of the toothed disc 223 is sleeved with a first transmission belt 224. One end of the first transmission belt 224 away from the toothed disc 223 is sleeved on the outside of the first lifting gear 225. The first lifting gear 225 is rotatably connected to the inner wall of the lifting block 220 near the rack. The top of one side of 122, and the bottom end of the lifting block 220 close to the rack 122 is rotatably connected with the second lifting gear 226, the first lifting gear 225 and the second lifting gear 226 are externally sleeved with a second transmission belt 227, and the first lifting gear 225 and the second lifting gear 226 are both meshed with the rack 122 on one side away from the toothed disk 223. Through such a design, the rotation of the motor 221 is used to drive the first lifting gear 225 and the second lifting gear 226 to rotate, and the device is lifted through the cooperation of the first lifting gear 225, the second lifting gear 226 and the rack 122, which improves the convenience of the device and reflects the good linkage of the device.

[0026] The transmission mechanism includes a bearing seat 228, a second bevel gear 230, a transmission rod 231 and a third bevel gear 233. The inner wall of the lifting block 220 is fixedly connected with the bearing seat 228, and the bearing seat 228 and the bottom end of the transmission rod 231 are rotatably connected. The bottom end of the transmission rod 231 is fixedly connected with the second bevel gear 230, and the second bevel gear 230 is meshed with the toothed disc 223. The top of the transmission rod 231 is fixedly connected with the third bevel gear 233. Through such a design, in the process of the motor 221 rotating to drive the device to lift, the lifting can drive the second bevel gear 230, the transmission rod 231 and the third bevel gear 233 to rotate, which reflects the good integrity and linkage of the device.

[0027] The locking mechanism includes a limit pin 241, a return spring 242, an adjusting rod 250, a moving block 251, a control rod 252, a locking gear 253 and a fourth bevel gear 254. The adjusting rod 250 is embedded on one side of the fixed block 240, and the adjusting rod 250 and the fixed block 240 are rotatably connected. The end of the adjusting rod 250 extending to the inside of the fixed block 240 is threadedly connected to the moving block 251, and the moving block 251 is slidably connected to the inner wall of the fixed block 240. The end of the moving block 251 away from the adjusting rod 250 is fixedly connected to the control rod 252, and the middle part of the control rod 252 is fixedly connected to the locking gear 253. The locking gear 253 is meshed with the limit pin 241, and the limit pin 241 and the fixed block 240 are slidably connected. A return spring 242 is fixedly connected between the bottom end of the limit pin 241 and the inner wall of the fixed block 240, and the end of the control rod 252 away from the adjusting rod 250 is fixedly connected to the fourth bevel gear 254, and the fourth bevel gear 254 is meshed with the third bevel gear 233. A limit hole 112 cooperating with the limit pin 241 is provided at the bottom end of the tower crane body 110. Through such a design, during the rotation of the motor 221, the limit pin 241 can be driven to move upward through the length of the transmission mechanism to limit the tower crane body 110. The limit pin 241 on the tower crane body 110 can be released by rotating the adjusting rod 250, thereby improving the convenience and practicality of the device and reflecting the good linkage of the device.

[0028] The clamping mechanism includes a locking rod 311, a fifth bevel gear 312, a sixth bevel gear 320, a connecting rod 321 and an embedding mechanism. The clamping seat 310 is rotatably connected to the locking rod 311 on one side close to the fixing frame 210, and the locking rod 311 is fixedly connected to the fifth bevel gear 312 at one end away from the fixing frame 210. The fifth bevel gear 312 is meshed with two groups of sixth bevel gears 320, and the sixth bevel gear 320 is fixedly connected to the connecting rod 321 on one side away from the fifth bevel gear 312. The two groups of connecting rods 321 are fixedly connected to the embedding mechanism at one end away from the sixth bevel gear 320. The embedding mechanism includes two groups of sleeves 322, a fifth bevel gear 312, a sixth bevel gear 320, a connecting rod 321 and an embedding mechanism. Three transmission belts 323 and two groups of fixing pins 324, a connecting rod 321 and a group of sleeves 322 are fixedly connected, the two groups of sleeves 322 are rotatably connected through bearings and the inner wall of the clamping seat 310, and the outer part of the two groups of sleeves 322 is sleeved with a third transmission belt 323, the interior of the two groups of sleeves 322 are threadedly connected with fixing pins 324, and the ends of the fixing pins 324 away from the sleeves 322 are embedded in the interior of the standard section 120, and the top of the standard section 120 is engaged with the clamping seat 310. Through such a design, the standard section 120 can be limited in position during the process of clamping the standard section 120 to avoid the standard section 120 from falling, thereby improving the safety of the device.

[0029] The transmission rod 231 is externally sleeved with a stabilizing block 232, and the stabilizing block 232 is rotatably connected to a groove provided inside the fixing block 240. This design makes the transmission rod 231 more stable during rotation, thereby improving the stability of the device.

[0030] The top and bottom ends of the moving block 251 are fixedly connected with protrusions, and the inside of the protrusions are inlaid with balls. Through such a design, the stability of the movement of the moving block 251 is increased, and the friction between the moving block 251 and the fixed block 240 is reduced, making the device lighter during operation and improving the stability of the device.

[0031] A guide groove 325 is provided at one end of the fixing pin 324 away from the sleeve 322, and the guide groove 325 is slidably connected to the guide block 326, and the guide block 326 is fixedly connected to the inside of the sixth bevel gear 320. Through such a design, the stability of the fixing pin 324 is increased, the fixing pin 324 is prevented from getting stuck, and the stability of the device is improved.

[0032] Working principle: During the use of the device, the motor 221 is first started. The motor 221 drives the first bevel gear 222 and the toothed disc 223 to rotate during the rotation. The toothed disc 223 drives the first lifting gear 225 to rotate through the first transmission belt 224 during the rotation. The first lifting gear 225 and the second lifting gear 226 rotate under the action of the second transmission belt 227, so that the device is lifted. The toothed disc 223 can drive the second bevel gear 230 to rotate during the rotation. The transmission rod 231 and the third bevel gear 233 rotate with the second bevel gear 230. The third bevel gear 233 drives the fourth bevel gear 254 and the control rod 252 to rotate. The control rod 252 drives the limit pin 241 to move upward through the locking gear 253 during the rotation until the limit pin 241 is embedded in the limit hole 112, thereby limiting the rotation of the tower crane body 110.

[0033] During the process of installing the standard section after the device is lifted, a section of the standard section is first lifted using a tower crane, and then the standard section is embedded in the interior of the clamping seat 310. At this time, the locking rod 311 is rotated, and the locking rod 311 drives the sleeve 322 to rotate through the cooperation of the fifth bevel gear 312, the sixth bevel gear 320 and the connecting rod 321. During the rotation of the sleeve 322, the fixing pin 324 is pushed through the thread on the inner wall to embed into the interior of the standard section 120, so that the vertical movement of the standard section 120 is restricted, and the operation ends here.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as exemplary and non-restrictive in all respects.

Claims

1. A tower crane lifting device with an anti-falling structure, comprising a device body (100), characterized in that: The device body (100) comprises a tower crane body (110), a rotating shaft seat (111), a standard section (120), a support section (121) and a rack (122); the bottom end of the tower crane body (110) is rotatably connected to the rotating shaft seat (111), and the bottom end of the rotating shaft seat (111) is fixedly connected to the top end of the support section (121); the bottom end of the support section (121) is fixedly connected to a plurality of groups of standard sections (120), and a rack (122) is provided on one side of the standard section (120); a fixing frame (210) is provided on one side of the support section (121); a fixing block (240) is fixedly connected to the top end of the fixing frame (210) on a side close to the support section (121), and a fixing block (240) is fixedly connected to the bottom end of the fixing frame (210) on a side close to the standard section (120). A lifting block (220) is connected, the fixed block (240) and the support section (121) are fixedly connected, and a locking mechanism is arranged inside the fixed block (240), the lifting block (220) and the fixed frame (210) are slidably connected, and a lifting mechanism is arranged inside the lifting block (220), a transmission mechanism is arranged between the lifting block (220) and the fixed block (240), an operating table (211) is fixedly connected to a side of the fixed frame (210) close to the standard section (120), and a fixing rod (212) is arranged at the top of the operating table (211), the fixing rod (212) and the fixed frame (210) are fixedly connected, and a clamping seat (310) is slidably connected at the bottom end of the fixing rod (212), and a clamping mechanism is arranged inside the clamping seat (310); The clamping mechanism comprises a locking rod (311), a fifth bevel gear (312), a sixth bevel gear (320), a connecting rod (321) and an embedding mechanism; a side of the clamping seat (310) close to the fixing frame (210) is rotatably connected to the locking rod (311), and an end of the locking rod (311) away from the fixing frame (210) is fixedly connected to the fifth bevel gear (312); the fifth bevel gear (312) is meshed with two groups of sixth bevel gears (320), and a side of the sixth bevel gear (320) away from the fifth bevel gear (312) is fixedly connected to the connecting rod (321); and ends of the two groups of connecting rods (321) away from the sixth bevel gear (320) are fixedly connected to the embedding mechanism; the embedding mechanism comprises two groups of sleeves (322), a third transmission belt (323) and a Two groups of fixing pins (324), the connecting rod (321) and a group of sleeves (322) are fixedly connected, the two groups of sleeves (322) are rotatably connected through bearings and the inner wall of the clamping seat (310), and the outer parts of the two groups of sleeves (322) are sleeved with a third transmission belt (323), the interiors of the two groups of sleeves (322) are threadedly connected with fixing pins (324), and the ends of the fixing pins (324) away from the sleeves (322) are embedded in the interior of the standard section (120), and the top of the standard section (120) is engaged with the clamping seat (310); the end of the fixing pin (324) away from the sleeve (322) is provided with a guide groove (325), and the guide groove (325) and the guide block (326) are slidably connected, and the guide block (326) is fixedly connected to the interior of the sixth bevel gear (320).

2. The tower crane lifting device with an anti-falling structure according to claim 1 is characterized in that: The lifting mechanism comprises a motor (221), a first bevel gear (222), a toothed disc (223), a first transmission belt (224), a first lifting gear (225), a second lifting gear (226) and a second transmission belt (227); the motor (221) is fixedly connected to the inside of the lifting block (220); one end of the motor (221) is fixedly connected to the first bevel gear (222); one side of the first bevel gear (222) is meshed with the toothed disc (223); the outside of the toothed disc (223) is sleeved with the first transmission belt (224); the first transmission belt (224) is remote from the lifting block (220); One end away from the toothed disc (223) is sleeved on the outside of the first jacking gear (225); the first jacking gear (225) is rotatably connected to the top end of the inner wall of the jacking block (220) close to the rack (122); and the bottom end of the jacking block (220) close to the rack (122) is rotatably connected to the second jacking gear (226); the outsides of the first jacking gear (225) and the second jacking gear (226) are sleeved with a second transmission belt (227); the first jacking gear (225) and the second jacking gear (226) are both meshed with the rack (122) on the side away from the toothed disc (223).

3. The tower crane lifting device with an anti-falling structure according to claim 1 is characterized in that: The transmission mechanism comprises a bearing seat (228), a second bevel gear (230), a transmission rod (231) and a third bevel gear (233); the inner wall of the lifting block (220) is fixedly connected to the bearing seat (228), and the bearing seat (228) and the bottom end of the transmission rod (231) are rotatably connected; the bottom end of the transmission rod (231) is fixedly connected to the second bevel gear (230), and the second bevel gear (230) is meshed with the toothed disc (223); and the top end of the transmission rod (231) is fixedly connected to the third bevel gear (233).

4. The tower crane lifting device with an anti-falling structure according to claim 1 is characterized in that: The locking mechanism comprises a limit pin (241), a return spring (242), an adjustment rod (250), a moving block (251), a control rod (252), a locking gear (253) and a fourth bevel gear (254); an adjustment rod (250) is embedded on one side of the fixed block (240); the adjustment rod (250) and the fixed block (240) are rotatably connected; one end of the adjustment rod (250) extending to the inside of the fixed block (240) is threadedly connected to the moving block (251); the moving block (251) and the inner wall of the fixed block (240) are slidably connected; one end of the moving block (251) away from the adjustment rod (250) is fixedly connected to the control rod (253); 52), and a locking gear (253) is fixedly connected to the middle of the control rod (252), the locking gear (253) is meshed with the limit pin (241), and the limit pin (241) is slidably connected to the fixed block (240), a return spring (242) is fixedly connected between the bottom end of the limit pin (241) and the inner wall of the fixed block (240), a fourth bevel gear (254) is fixedly connected to one end of the control rod (252) away from the adjusting rod (250), and the fourth bevel gear (254) is meshed with the third bevel gear (233), and a limit hole (112) matching with the limit pin (241) is provided at the bottom end of the tower crane body (110).

5. The tower crane lifting device with an anti-falling structure according to claim 3 is characterized in that: The transmission rod (231) is sleeved with a stabilizing block (232) on its exterior, and the stabilizing block (232) is rotatably connected to a groove provided inside the fixing block (240).

6. The tower crane lifting device with an anti-falling structure according to claim 4 is characterized in that: The top and bottom ends of the moving block (251) are both fixedly connected with protrusions, and the interiors of the protrusions are inlaid with balls.

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