Beam lifting mechanism of internal climbing type tower crane

Abstract

The utility model relates to the technical field of building construction equipment, and discloses a beam lifting mechanism of an internal climbing type tower crane, which comprises a bottom standard knot, the upper end of the bottom standard knot is fixedly connected with an upper standard knot, and a support beam component is arranged on the outer side of the upper standard knot. According to the beam lifting mechanism of the internal climbing type tower crane, four sets of same limiting gears, ratchet wheels, pawls, springs, electric push rods, bottom standard knots and upper standard knots are arranged in each set of limiting assembly for beam lifting, the bottom standard knots and the upper standard knots move upwards, toothed rails move upwards along with the bottom standard knots and the upper standard knots, and the limiting gears rotate anticlockwise; the spring pulls the pawl to be meshed with the limiting gear, so that the bottom standard knot and the upper standard knot are locked, each supporting beam assembly is provided with two limiting assemblies, the upper supporting beam assembly and the lower supporting beam assembly are provided with sixteen ratchet wheels and pawls, the weight of the tower crane is jointly borne, the load capacity is high, and the supporting beam assemblies are stable in structure.

Description

Technical Field

[0001] The utility model relates to the technical field of construction equipment, in particular to a beam lifting mechanism of an internal climbing tower crane. Background Technique

[0002] A tower crane is an industrial equipment used for hoisting and installing heavy materials, and is often applied to construction sites, ports, shipyards and other places with a large demand for hoisting operations. In the construction of super high-rise buildings, especially super high-rise buildings with a tube structure form, the internal climbing tower crane has gradually become the preferred solution due to its advantages in terms of safety and economy. However, in actual projects, due to unreasonable section division, the internal climbing tower crane has to be installed in the elevator shaft of the completed basement structure. In order to achieve its efficient climbing, a beam lifting mechanism of an internal climbing tower crane has emerged as the times require.

[0003] Chinese Utility Model Patent Publication No.: CN 208948711 U, which discloses a beam lifting mechanism of an internal climbing tower crane. This mechanism only uses two support beams in a cyclic manner and uses its own beam lifting winch to transfer the steel beam, without the assistance of additional equipment. This new type of beam lifting device for internal climbing tower cranes has the characteristics of novelty, safety and reliability, greatly shortening the climbing period of the tower crane and reducing the input of transfer resources. However, the beam lifting mechanism of this internal climbing tower crane has the problem that the width of the support beam cannot be adjusted, making it difficult to adapt to the site conditions of different working conditions, resulting in a slow assembly speed and a reduced lifting efficiency. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a beam lifting mechanism of an internal climbing tower crane, which can effectively solve the problems in the prior art.

[0005] The technical solution adopted by the utility model is: a beam lifting mechanism of an internal climbing tower crane, including a bottom standard section, the upper end of the bottom standard section is fixedly connected with an upper standard section, a support beam assembly is arranged outside the upper standard section, a limiting component and a first fixing component are arranged inside the support beam assembly, the lower end of the bottom standard section is fixedly connected with a jacking seat, the upper end of the jacking seat is fixedly connected with a jacking cylinder, a fixing seat is fixedly connected inside the bottom standard section, and two fixing components are fixedly connected to both sides of the jacking seat;

[0006] The bottom standard section includes a standard section body, a tooth rail and a limiting strip, the tooth rails are fixedly connected to both sides of the standard section body, and the limiting strips are fixedly connected to both sides of the standard section body.

[0007] Preferably, the limiting component includes a connecting plate, a limiting plate, a limiting gear, a ratchet wheel, a pawl, a spring, an electric push rod, a limiting pulley, a side fixing rod and a lifting lug. The two sides of the connecting plate are fixedly connected with the limiting plates. The outer sides of the limiting plates are rotatably connected with the limiting gears. The inner sides of the limiting gears are fixedly connected with the ratchet wheels. The outer sides of the limiting plates are rotatably connected with the pawls. The inner sides of the pawls are fixedly connected with the springs. The outer sides of the limiting plates are fixedly connected with the electric push rods. The outer sides of the limiting plates are fixedly connected with the limiting pulleys. The outer sides of the limiting plates are fixedly connected with the side fixing rods. The outer sides of the side fixing rods are fixedly connected with the lifting lugs.

[0008] Through the above technical solution, a limiting component is provided, which forms a support beam component with the first fixing component. When installing, the two limiting components are spliced and installed from both sides of the upper standard section. The side fixing rods of the two limiting components are locked with bolts to make the limiting gears engage with the tooth rails, and the assembly is simple.

[0009] Preferably, the support beam component is composed of two groups of symmetrically arranged limiting components and the first fixing component. Each group of limiting components is internally provided with four identical sets of limiting gears, ratchet wheels, pawls, springs and electric push rods.

[0010] Through the above technical solution, each group of limiting components is internally provided with four identical sets of limiting gears, ratchet wheels, pawls, springs and electric push rods. When the bottom standard section and the upper standard section are lifted, the bottom standard section and the upper standard section move upward, and the tooth rails move upward accordingly. The limiting gears rotate counterclockwise. When the lifting stops, the spring pulls the pawl to bite the limiting gear, thereby locking the bottom standard section and the upper standard section. Each support beam component is provided with two limiting components, and the upper and lower two support beam components are provided with sixteen ratchet wheels and pawls, which jointly bear the weight of the tower crane, have strong load capacity, and the structure of the support beam component is stable.

[0011] Preferably, the limiting gear is in meshing connection with the tooth rail, the ratchet wheel is adapted to the pawl, the output end of the electric push rod is in contact with the pawl, and the width of the limiting pulley is equal to the distance between the tooth rail and the limiting strip.

[0012] Through the above technical solution, a limiting pulley is provided. The limiting pulley is arranged between the tooth rail and the limiting strip, making the relative movement between the support beam component and the upper standard section smoother.

[0013] Preferably, the first fixing component includes a cross bar, a screw rod, a first bevel gear, a telescopic rod, a motor, a second bevel gear, a fixing plate and a supporting seat. The screw rod is arranged at the center of the cross bar. The outer side of the screw rod is fixedly connected with the first bevel gear. The outer side of the cross bar is slidably connected with one end of the telescopic rod. The upper end of the telescopic rod is fixedly connected with the motor. The output end of the motor is fixedly connected with the second bevel gear. The other end of the telescopic rod is fixedly connected with the fixing plate. The lower end of the telescopic rod is fixedly connected with the supporting seat.

[0014] Through the above technical solution, a first fixing component is provided. When performing the operation of lifting the lifting beam, the first fixing component increases its stroke and is fixedly installed on the wall or floor slab to provide support for the tower crane.

[0015] Preferably, the second bevel gear is meshed with the first bevel gear, the screw rod is threadedly connected to the cross bar, and the telescopic rod is rotatably connected to the screw rod.

[0016] Through the above technical solution, the second bevel gear and the first bevel gear are provided. When performing the operation of lifting the lifting beam, the motor is started to drive the second bevel gear to rotate. The rotation of the second bevel gear drives the first bevel gear to rotate, and the screw rod rotates accordingly. The screw rod is threadedly connected to the telescopic rod, and the total length of the telescopic rod and the cross bar increases until the fixing plate is in tight contact with the wall or the supporting seat contacts the floor slab. Bolts are used to lock and fix the first fixing component to the wall or floor slab. The upper and lower two supporting beam components are fixedly installed. The second fixing component is fixedly installed on the wall or wall panel. The lifting cylinder is started to increase its stroke, driving the bottom standard section and the upper standard section to lift. After the lifting is completed, the supporting beam component limits the position of the tower crane. The second fixing component is separated from the wall or wall panel, the stroke of the lifting cylinder is shortened, and then the second fixing component is fixedly installed on the wall or wall panel, and the lifting is repeated.

[0017] Preferably, the first fixing component and the second fixing component have the same structure, and the bottom standard section and the upper standard section have the same structure.

[0018] Through the above technical solution, until the lifting seat is about to contact the lower supporting beam component, the upper supporting beam component is separated from the wall or floor slab. The lifting and hoisting equipment is used to connect the lifting lugs, the electric push rod is started to drive the pawl to separate from the ratchet, and the upper supporting beam component is hoisted upward. After reaching the appropriate position, it is locked, and then the lower supporting beam component is hoisted. After the hoisting of the two supporting beam components is completed, the lifting operation can be continued.

[0019] Compared with the prior art, the present utility model provides a lifting beam mechanism for an internal climbing tower crane, having the following beneficial effects:

[0020] 1. The beam lifting mechanism of this internal climbing tower crane is provided with a limit component, which forms a support beam component with the first fixing component. When installing, the two limit components are spliced and installed from both sides of the upper standard section, and the side fixing rods of the two limit components are locked with bolts to make the limit gear mesh with the tooth rail. The assembly is simple. Each limit component internally has four groups of the same limit gears, ratchets, pawls, springs, and electric push rods. When the bottom standard section and the upper standard section are lifted, the bottom standard section and the upper standard section move upward, and the tooth rail moves upward accordingly. The limit gear rotates counterclockwise. When the lifting stops, the spring pulls the pawl to bite the limit gear, thus locking the bottom standard section and the upper standard section. Each support beam component is provided with two limit components, and the upper and lower two support beam components are provided with sixteen ratchets and pawls, jointly bearing the weight of the tower crane, with strong load capacity and stable structure of the support beam component. The limit pulley is arranged between the tooth rail and the limit strip, making the relative movement between the support beam component and the upper standard section smoother;

[0021] 2. When the beam lifting mechanism of this internal climbing tower crane performs the beam lifting operation, start the motor to drive the second bevel gear to rotate. The rotation of the second bevel gear drives the first bevel gear to rotate, and the screw rotates accordingly. The screw is threadedly connected to the telescopic rod, and the total length of the telescopic rod and the cross bar increases until the fixing plate touches the wall tightly, or the support seat touches the floor slab. Use bolts to lock and fix the first fixing component to the wall or the floor slab. Fix and install the upper and lower two support beam components. Fix and install the second fixing component to the wall or the wall panel. Start the jacking cylinder to increase the stroke, driving the bottom standard section and the upper standard section to lift. After the lifting is completed, the support beam component limits the tower crane. Separate the second fixing component from the wall or the wall panel, shorten the stroke of the jacking cylinder, and then fix and install the second fixing component to the wall or the wall panel. Repeat the jacking until the jacking seat is about to contact the lower support beam component. Separate the upper support beam component from the wall or the floor slab. Use a hoisting and lifting device to connect the lifting lugs, start the electric push rod to drive the pawl to separate from the ratchet, hoist the upper support beam component upward, lock it after reaching the appropriate position, and then hoist the lower support beam component. After the hoisting of the two support beam components is completed, the lifting operation can continue. The support beam component can be hoisted and moved without disassembly, saving time. The first fixing component and the second fixing component can adjust the width, and the adjustment method is simple, improving the lifting efficiency. Brief Description of the Drawings

[0022] Figure 1 It is a three-dimensional structural schematic diagram of the present utility model;

[0023] Figure 2 It is an enlarged structural schematic diagram of the support beam component of the present utility model;

[0024] Figure 3 It is an enlarged structural schematic diagram of the bottom standard section and the jacking seat of the present utility model;

[0025] Figure 4 This is a schematic diagram of the split structure of the limit component and the fixing component I of the present utility model;

[0026] Figure 5 This is a schematic diagram of the split structure of the fixing component I of the present utility model;

[0027] Figure 6 This is a schematic diagram of the split structure of the limit component of the present utility model.

[0028] Wherein: 1. Bottom standard section; 101. Standard section body; 102. Tooth rail; 103. Limit strip; 2. Upper standard section; 3. Support beam assembly; 4. Limit component; 401. Connecting plate; 402. Limit plate; 404. Limit gear; 405. Ratchet wheel; 406. Pawl; 407. Spring; 408. Electric push rod; 409. Limit pulley; 410. Side fixing rod; 411. Suspension ear; 5. Fixing component I; 501. Cross bar; 502. Screw rod; 503. Bevel gear I; 504. Telescopic rod; 505. Motor; 506. Bevel gear II; 507. Fixed plate; 508. Support seat; 6. Jacking seat; 7. Jacking cylinder; 8. Fixed seat; 9. Fixing component II. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0030] Embodiment 1: As Figure 1-6 shown, a beam lifting mechanism of an internal climbing tower crane provided by the present utility model includes a bottom standard section 1, the upper end of the bottom standard section 1 is fixedly connected to an upper standard section 2, a support beam assembly 3 is arranged outside the upper standard section 2, a limit component 4 and a fixing component I 5 are arranged inside the support beam assembly 3, the lower end of the bottom standard section 1 is fixedly connected to a jacking seat 6, the upper end of the jacking seat 6 is fixedly connected to a jacking cylinder 7, a fixed seat 8 is fixedly connected inside the bottom standard section 1, and fixing components II 9 are fixedly connected to both sides of the jacking seat 6;

[0031] The bottom standard section 1 includes a standard section body 101, a tooth rail 102 and a limit strip 103. Tooth rails 102 are fixedly connected to both sides of the standard section body 101, and limit strips 103 are fixedly connected to both sides of the standard section body 101.

[0032] Specifically, the limit component 4 includes a connecting plate 401, a limit plate 402, a limit gear 404, a ratchet wheel 405, a pawl 406, a spring 407, an electric push rod 408, a limit pulley 409, a side fixing rod 410 and a lifting lug 411. On both sides of the connecting plate 401, the limit plates 402 are fixedly connected. On the outer side of the limit plate 402, the limit gear 404 is rotatably connected. Inside the limit gear 404, the ratchet wheel 405 is fixedly connected. On the outer side of the limit plate 402, the pawl 406 is rotatably connected. Inside the pawl 406, the spring 407 is fixedly connected. On the outer side of the limit plate 402, the electric push rod 408 is fixedly connected. On the outer side of the limit plate 402, the limit pulley 409 is fixedly connected. On the outer side of the limit plate 402, the side fixing rod 410 is fixedly connected. On the outer side of the side fixing rod 410, the lifting lug 411 is fixedly connected. The advantage is that the limit component 4 is provided, which forms the support beam component 3 with the fixing component one 5. When installing, the two limit components 4 are spliced and installed from both sides of the upper standard section 2, and the side fixing rods 410 of the two limit components 4 are locked with bolts, so that the limit gear 404 meshes with the tooth rail 102, and the assembly is simple.

[0033] Specifically, the support beam component 3 is composed of two groups of symmetrically arranged limit components 4 and a fixing component one 5. Inside each limit component 4, there are four identical limit gears 404, ratchet wheels 405, pawls 406, springs 407, and electric push rods 408. The advantage is that inside each limit component 4, there are four identical limit gears 404, ratchet wheels 405, pawls 406, springs 407, and electric push rods 408. When lifting the bottom standard section 1 and the upper standard section 2, the bottom standard section 1 and the upper standard section 2 move upward, and the tooth rail 102 moves upward accordingly. The limit gear 404 rotates counterclockwise. When the lifting stops, the spring 407 pulls the pawl 406 to engage with the limit gear 404, thereby locking the bottom standard section 1 and the upper standard section 2. Each support beam component 3 is provided with two limit components 4, and the upper and lower two support beam components 3 are provided with sixteen ratchet wheels 405 and pawls 406, which jointly bear the weight of the tower crane, have strong load-bearing capacity, and the structure of the support beam component 3 is stable.

[0034] Specifically, the limit gear 404 is meshed with the tooth rail 102, the ratchet wheel 405 is adapted to the pawl 406, the output end of the electric push rod 408 is in contact with the pawl 406, and the width of the limit pulley 409 is equal to the distance between the tooth rail 102 and the limit strip 103. The advantage is that the limit pulley 409 is provided, and the limit pulley 409 is arranged between the tooth rail 102 and the limit strip 103, making the relative movement of the support beam component 3 and the upper standard section 2 smoother.

[0035] Embodiment 2: As Figure 2-6 shown, as an improvement to the previous embodiment.

[0036] Specifically, the first fixing component 5 includes a cross bar 501, a screw rod 502, a first bevel gear 503, a telescopic rod 504, a motor 505, a second bevel gear 506, a fixing plate 507 and a support seat 508. A screw rod 502 is arranged at the center of the cross bar 501. A first bevel gear 503 is fixedly connected to the outer side of the screw rod 502. The outer side of the cross bar 501 is slidably connected to one end of the telescopic rod 504. The upper end of the telescopic rod 504 is fixedly connected to a motor 505. The output end of the motor 505 is fixedly connected to a second bevel gear 506. The other end of the telescopic rod 504 is fixedly connected to a fixing plate 507. The lower end of the telescopic rod 504 is fixedly connected to a support seat 508. The advantage is that the first fixing component 5 is provided. When the beam lifting operation is carried out, the first fixing component 5 increases the stroke and is fixedly installed with the wall or floor slab to provide support for the tower crane.

[0037] Specifically, the second bevel gear 506 is meshed with the first bevel gear 503. The screw rod 502 is threadedly connected to the cross bar 501. The telescopic rod 504 is rotatably connected to the screw rod 502. The advantage is that the second bevel gear 506 and the first bevel gear 503 are provided. When the beam lifting operation is carried out, the motor 505 is started to drive the second bevel gear 506 to rotate. The rotation of the second bevel gear 506 drives the first bevel gear 503 to rotate. The screw rod 502 rotates accordingly. The screw rod 502 is threadedly connected to the telescopic rod 504. The total length of the telescopic rod 504 and the cross bar 501 increases until the fixing plate 507 is in tight contact with the wall or the support seat 508 is in contact with the floor slab. The first fixing component 5 is locked and fixed to the wall or floor slab with bolts. The upper and lower two support beam components 3 are fixedly installed. The second fixing component 9 is fixedly installed with the wall or wall panel. The jacking cylinder 7 is started to increase the stroke, driving the bottom standard section 1 and the upper standard section 2 to lift. After the lifting is completed, the support beam component 3 limits the position of the tower crane. The second fixing component 9 is separated from the wall or wall panel. The stroke of the jacking cylinder 7 is shortened. Then the second fixing component 9 is fixedly installed with the wall or wall panel, and the jacking is repeated.

[0038] Specifically, the first fixing component 5 and the second fixing component 9 have the same structure. The bottom standard section 1 and the upper standard section 2 have the same structure. The advantage is that until the jacking seat 6 is about to contact the lower support beam component 3, the upper support beam component 3 is separated from the wall or floor slab. The lifting and hoisting equipment is used to connect the lifting lug 411. The electric push rod 408 is started to drive the pawl 406 to separate from the ratchet 405. The upper support beam component 3 is hoisted upward and locked after reaching the appropriate position. Then the lower support beam component 3 is hoisted. After the two support beam components 3 are hoisted, the lifting operation can be continued.

[0039] Working principle: When in use, splice and install the two limit components 4 from both sides of the upper standard section 2, lock the side fixing rods 410 of the two limit components 4 with bolts, so that the limit gears 404 are engaged with the tooth rails 102, connect the support beam assembly 3 with the upper standard section 2, start the motor 505 to drive the bevel gear two 506 to rotate, the rotation of the bevel gear two 506 drives the bevel gear one 503 to rotate, and the screw rod 502 rotates accordingly. The screw rod 502 is threadedly connected with the telescopic rod 504, and the total length of the telescopic rod 504 and the cross bar 501 increases until the fixing plate 507 is in tight contact with the wall or the support seat 508 is in contact with the floor slab. Use bolts to lock and fix the fixing component one 5 with the wall or the floor slab, fixedly install the upper and lower two support beam assemblies 3, fixedly install the fixing component two 9 with the wall or the wall panel. When performing the beam lifting operation, start the jacking cylinder 7 to increase the stroke, drive the bottom standard section 1 and the upper standard section 2 to lift. The bottom standard section 1 and the upper standard section 2 move upward, and the tooth rail 102 moves upward accordingly. The limit gear 404 rotates counterclockwise. When the lifting stops, the spring 407 pulls the pawl 406 to engage with the limit gear 404, thereby locking the bottom standard section 1 and the upper standard section 2. Each support beam assembly 3 is provided with two limit components 4, and the upper and lower two support beam assemblies 3 are provided with sixteen ratchets 405 and pawls 406, which jointly bear the weight of the tower crane, have strong load capacity, and the structure of the support beam assembly 3 is stable. The limit pulley 409 is arranged between the tooth rail 102 and the limit strip 103, making the relative movement between the support beam assembly 3 and the upper standard section 2 smoother. Separate the fixing component two 9 from the wall or the wall panel, shorten the stroke of the jacking cylinder 7, and then fixedly install the fixing component two 9 with the wall or the wall panel. Repeat the jacking until the jacking seat 6 is about to contact the lower support beam assembly 3. Separate the upper support beam assembly 3 from the wall or the floor slab, use the hoisting equipment to connect the lifting lug 411, start the electric push rod 408 to drive the pawl 406 to separate from the ratchet 405, hoist the upper support beam assembly 3 upward, lock it after reaching the appropriate position, and then hoist the lower support beam assembly 3. After the hoisting of the two support beam assemblies 3 is completed, the lifting operation can be continued. The support beam assembly 3 can be hoisted and moved without disassembly, saving time. The fixing component one 5 and the fixing component two 9 can adjust the width, and the adjustment method is simple, improving the lifting efficiency.

[0040] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A beam lifting mechanism of an internal climbing tower crane, comprising a bottom standard section (1), characterized in that: The upper end of the bottom standard section (1) is fixedly connected to the upper standard section (2); a support beam assembly (3) is arranged on the outer side of the upper standard section (2); a limit assembly (4) and a fixing assembly (5) are arranged inside the support beam assembly (3); a lifting seat (6) is fixedly connected to the lower end of the bottom standard section (1); a lifting cylinder (7) is fixedly connected to the upper end of the lifting seat (6); a fixing seat (8) is fixedly connected to the inside of the bottom standard section (1); and fixing assemblies (9) are fixedly connected to the two sides of the lifting seat (6); The bottom standard section (1) comprises a standard section body (101), a rack rail (102) and a limit strip (103), wherein the rack rails (102) are fixedly connected to both sides of the standard section body (101), and the limit strip (103) is fixedly connected to both sides of the standard section body (101).

2. The beam lifting mechanism of an inner climbing tower crane according to claim 1, characterized in that: The limiting assembly (4) comprises a connecting plate (401), a limiting plate (402), a limiting gear (404), a ratchet (405), a pawl (406), a spring (407), an electric push rod (408), a limiting pulley (409), a side fixing rod (410) and a lifting lug (411). Both sides of the connecting plate (401) are fixedly connected to the limiting plate (402), the outer side of the limiting plate (402) is rotatably connected to the limiting gear (404), and the inner side of the limiting gear (404) is A ratchet (405) is fixedly connected, the outer side of the limit plate (402) is rotatably connected to a pawl (406), the inner side of the pawl (406) is fixedly connected to a spring (407), the outer side of the limit plate (402) is fixedly connected to an electric push rod (408), the outer side of the limit plate (402) is fixedly connected to a limit pulley (409), the outer side of the limit plate (402) is fixedly connected to a side fixing rod (410), and the outer side of the side fixing rod (410) is fixedly connected to a lifting ear (411).

3. The beam lifting mechanism of an inner climbing tower crane according to claim 2, characterized in that: The support beam assembly (3) is composed of two groups of symmetrically arranged limit assemblies (4) and a fixing assembly (5), and each group of the limit assemblies (4) is provided with four identical groups of limit gears (404), ratchets (405), pawls (406), springs (407), and electric push rods (408).

4. The beam lifting mechanism of an inner climbing tower crane according to claim 3, characterized in that: The limiting gear (404) is meshedly connected with the rack (102), the ratchet (405) is matched with the pawl (406), the output end of the electric push rod (408) is in contact with the pawl (406), and the width of the limiting pulley (409) is equal to the distance between the rack (102) and the limiting strip (103).

5. The beam lifting mechanism of an inner climbing tower crane according to claim 1, characterized in that: The fixing assembly 1 (5) comprises a cross bar (501), a screw rod (502), a bevel gear 1 (503), a telescopic rod (504), a motor (505), a bevel gear 2 (506), a fixing plate (507) and a support seat (508); a screw rod (502) is arranged at the center of the cross bar (501); the outer side of the screw rod (502) is fixedly connected to the bevel gear 1 (503); the outer side of the cross bar (501) is slidably connected to one end of the telescopic rod (504); the upper end of the telescopic rod (504) is fixedly connected to the motor (505); the output end of the motor (505) is fixedly connected to the bevel gear 2 (506); the other end of the telescopic rod (504) is fixedly connected to the fixing plate (507); and the lower end of the telescopic rod (504) is fixedly connected to the support seat (508).

6. The beam lifting mechanism of an inner climbing tower crane according to claim 5, characterized in that: The second bevel gear (506) is meshingly connected with the first bevel gear (503), the screw rod (502) is threadedly connected with the cross bar (501), and the telescopic rod (504) is rotationally connected with the screw rod (502).

7. The beam lifting mechanism of an inner climbing tower crane according to claim 6, characterized in that: The structure of the fixing assembly 1 (5) is the same as that of the fixing assembly 2 (9), and the structure of the bottom standard section (1) is the same as that of the upper standard section (2).

Images