Anti-falling structure of vertical frame of tower crane

Abstract

The utility model relates to the technical field of tower cranes, in particular to an anti-falling structure of a vertical frame of a tower crane, which comprises a base and a vertical frame, a jacking sleeve frame is arranged at the top of the vertical frame, the top end of the jacking sleeve frame is connected with a lower rotary platform, and a clamping block is mounted at one end of the lower rotary platform in a sliding manner; through the transmission effect of an adjusting motor, a belt pulley, a transmission belt, a bidirectional lead screw and an adjusting seat, the adjusting seat can be driven to move in an adjusting groove, the tower crane is convenient to disassemble and assemble, through a clamping block slidably installed at one end of the lower rotary platform, when the adjusting seat moves close to the clamping block, the clamping block can be slidably inserted into a clamping groove, and the clamping block is clamped. The limiting pin penetrates through the limiting hole and is inserted into the limiting groove, so that the clamping block is not prone to being separated from the clamping groove, the limiting effect on the jacking sleeve frame can be enhanced through the elastic effect of the fixing spring, the situation that the sleeve frame falls due to bolt looseness is not prone to occurring, and the safety of the tower crane is not affected.

Description

Technical Field

[0001] This utility model relates to the field of tower crane technology, specifically to a fall-prevention structure for a tower crane frame. Background Technology

[0002] Tower cranes, also known as tower hoists, originated in Western Europe. They are rotating cranes with a luffing boom mounted on a tall tower. They have a large working space and are mainly used for the vertical and horizontal transport of materials and the installation of building components in building construction. They are used to lift construction materials such as steel bars, timber, concrete, and steel pipes. They are an indispensable piece of equipment on construction sites, and tower cranes rise as the building is raised.

[0003] In existing technologies, tower cranes typically have a support frame on their erectories to facilitate the installation and dismantling of the tower crane, supporting the upper part of the crane and allowing standard sections to be introduced or removed. However, existing support frames are usually fixed to the lower slewing platform with bolts, which can easily lead to bolt loosening and the support frame falling, seriously affecting the safety of the tower crane. Therefore, we propose a fall protection structure for the tower crane erectories. Utility Model Content

[0004] The purpose of this utility model is to provide a fall-prevention structure for a tower crane frame to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a fall prevention structure for a tower crane frame, comprising: a base and a frame, a lifting sleeve is provided on the top of the frame, a lower slewing platform is connected to the top of the lifting sleeve, a locking block is slidably installed on one end of the lower slewing platform, and a locking groove is provided on the end of the lifting sleeve near the locking block.

[0006] The top of the card block has a limit groove, and the lifting sleeve is installed with a limit pin near the top of the limit groove. The end of the card block away from the card groove is connected to a slide rod, and a fixing spring is sleeved on the outside of the slide rod.

[0007] An adjusting seat is fitted at the end of the slide bar away from the locking block. A two-way lead screw is connected to the top of one end of the adjusting seat. A pulley is fitted on the outer wall of the middle part of the two-way lead screw. A transmission belt is connected to the outer wall of the pulley. An adjusting motor is installed on the top of the lower rotating platform near the transmission belt.

[0008] Preferably, a lifting arm is fixedly installed at the top of the lower slewing platform, and a lifting device is provided at one end of the lifting arm.

[0009] Preferably, the lower slewing platform has a sliding groove at one end near the locking block, one end of the locking block is slidably connected to the inner wall of the sliding groove, the other end of the locking block is slidably inserted into the locking groove, and the bottom of the end of the locking block near the lifting frame is an arc surface.

[0010] Preferably, the lifting sleeve has a limiting hole near the top of the limiting pin, the bottom of the limiting hole is connected to the slot, and the bottom of the limiting pin slides through the limiting hole and is inserted into the limiting slot.

[0011] Preferably, the end of the sliding groove away from the locking block is connected to an adjusting groove, and the adjusting seat is slidably installed in the adjusting groove, with the adjusting seat threaded onto the outer wall of one end of the bidirectional lead screw.

[0012] Preferably, the adjusting seat has a sliding hole on its surface near the slide rod, the slide rod has a T-shaped cross-section, and one end of the slide rod slides through the sliding hole and is fixedly installed on the locking block.

[0013] Preferably, one end of the fixing spring is fixedly installed on one end of the locking block, and the other end of the fixing spring is fixedly connected to the adjusting seat.

[0014] Preferably, two bidirectional lead screws are symmetrically arranged, with both ends of the two bidirectional lead screws rotatably mounted on the inner wall of adjacent adjustment grooves. Pulleys are fixedly sleeved on the outer wall of the middle part of the two bidirectional lead screws and on the rotating shaft of the adjustment motor. The three pulleys are connected by a transmission belt.

[0015] Preferably, the lower slewing platform has a transmission groove near the top of the pulley, and a protective box is provided outside the adjusting motor, with the bottom of the protective box fixedly installed on the top of the lower slewing platform.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention utilizes the transmission action of the motor, pulley, transmission belt, double-acting screw, and adjusting seat to move the adjusting seat within the adjusting groove, facilitating the assembly and disassembly of the tower crane. A locking block slidably mounted at one end of the lower slewing platform allows the adjusting seat to slide into the locking slot as it moves closer to the locking block, thus limiting the lifting frame. By passing a limiting pin through the limiting hole and inserting it into the limiting groove, the locking block is less likely to detach from the slot. The elasticity of the fixing spring further enhances the limiting effect on the lifting frame, preventing bolt loosening and subsequent frame fall, thus ensuring the safety of the tower crane. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the front sectional view of a partial structure of this utility model;

[0020] Figure 3 This utility model Figure 2 Enlarged schematic diagram of the structure at point A in the middle;

[0021] Figure 4 This is a three-dimensional schematic diagram of a partial structure of the present invention.

[0022] In the diagram: 1. Base; 2. Frame; 3. Lifting sleeve; 4. Lower slewing platform; 5. Lifting boom; 6. Lifting device; 7. Slot; 8. Block; 9. Slide rod; 10. Fixed spring; 11. Slide hole; 12. Adjusting seat; 13. Two-way lead screw; 14. Sliding groove; 15. Adjusting groove; 16. Limiting groove; 17. Limiting pin; 18. Limiting hole; 19. Pulley; 20. Transmission belt; 21. Adjusting motor; 22. Protective box; 23. Transmission groove. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0024] Please see Figures 1 to 4 This utility model provides a technical solution: a fall-prevention structure for a tower crane frame, comprising: a base 1 and a frame 2. A lifting sleeve 3 is provided on the top of the frame 2. A lower slewing platform 4 is connected to the top of the lifting sleeve 3. A locking block 8 is slidably installed at one end of the lower slewing platform 4. A locking groove 7 is provided at the end of the lifting sleeve 3 near the locking block 8. A lifting boom 5 is fixedly installed on the top of the lower slewing platform 4. A lifting device 6 is provided at one end of the lifting boom 5. A sliding groove 14 is provided at the end of the lower slewing platform 4 near the locking block 8. One end of the locking block 8 is slidably connected to the inner wall of the sliding groove 14. The other end of the locking block 8 is slidably inserted into the locking groove 7. The bottom of the end of the locking block 8 near the lifting sleeve 3 is arc-shaped, which can limit the lifting sleeve 3.

[0025] A limiting groove 16 is formed at the top of the locking block 8. A limiting pin 17 is installed at the top of the lifting sleeve 3 near the limiting groove 16. A sliding rod 9 is connected to the end of the locking block 8 away from the locking groove 7. A fixing spring 10 is sleeved on the outside of the sliding rod 9. A limiting hole 18 is formed at the top of the lifting sleeve 3 near the limiting pin 17. The bottom end of the limiting hole 18 is connected to the locking groove 7. The bottom end of the limiting pin 17 slides through the limiting hole 18 and is inserted into the limiting groove 16, making it difficult for the locking block 8 to disengage from the locking groove 7. One end of the fixing spring 10 is fixedly installed at one end of the locking block 8, and the other end of the fixing spring 10 is fixedly connected to the adjusting seat 12, which can enhance the limiting effect on the lifting sleeve 3.

[0026] An adjusting seat 12 is fitted onto the end of the slide rod 9 away from the locking block 8. A double-acting lead screw 13 is connected to the top of one end of the adjusting seat 12. A pulley 19 is fitted onto the outer wall of the middle part of the double-acting lead screw 13. A drive belt 20 is connected to the outer wall of the pulley 19. An adjusting motor 21 is installed on the lower rotary platform 4 near the top of the drive belt 20. An adjusting groove 15 is connected to the end of the sliding groove 14 away from the locking block 8. The adjusting seat 12 is slidably installed in the adjusting groove 15. The adjusting seat 12 is threaded onto the outer wall of one end of the double-acting lead screw 13. The double-acting lead screw 13 can drive the adjusting seat 12 to move, so that the two adjusting seats located on the same double-acting lead screw 13 can move closer to or further away from each other. The adjusting seat 12 has a sliding hole 11 on its surface near the slide rod 9. The slide rod 9 has a T-shaped cross-section. One end of the slide rod 9 slides through the sliding hole 11 and is fixedly installed on the locking block 8, making it difficult for the slide rod 9 to disengage from the sliding hole 11 when moving. It can move away from the locking block 8 through the adjusting seat 12, driving the slide rod 9 and the locking block 8 away from the locking groove 7, thereby facilitating the removal of the limiting pin 17 so that the locking block 8 leaves the locking groove 7. Two bidirectional lead screws 13 are symmetrically arranged. Both ends of the two bidirectional lead screws 13 are rotatably installed on the inner wall of the adjacent adjusting groove 15. The middle outer wall of the two bidirectional lead screws 13 and the rotating shaft of the adjusting motor 21 are fixedly sleeved with pulleys 19. The three pulleys 19 are connected by a transmission belt 20, which facilitates simultaneous limiting at the four corners of the lifting frame 3 and improves the anti-fall effect of the lifting frame. A transmission groove 23 is provided at the top of the lower slewing platform 4 near the pulley 19. A protective box 22 is provided outside the adjusting motor 21. The bottom of the protective box 22 is fixedly installed at the top of the lower slewing platform 4 to protect the adjusting motor 21.

[0027] When this device is working, by adjusting the transmission action of the motor 21, pulley 19, transmission belt 20, double-acting screw 13 and adjusting seat 12, the adjusting seat 12 can be moved within the adjusting groove 15, facilitating the assembly and disassembly of the tower crane. Through the locking block 8 slidably installed at one end of the lower slewing platform 4, when the adjusting seat 12 moves close to the locking block 8, the locking block 8 can be slidably inserted into the locking groove 7, thereby limiting the lifting frame 3. By passing the limiting pin 17 through the limiting hole 18 and inserting it into the limiting groove 16, the locking block 8 is not easily dislodged from the locking groove 7. Through the elastic action of the fixing spring 10, the limiting effect on the lifting frame 3 can be strengthened, and the situation of the frame falling due to loose bolts is not likely to occur, so as not to affect the safety of the tower crane.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fall protection structure for a tower crane erection, comprising: The base (1) and the upright (2) are characterized in that: a lifting sleeve (3) is provided on the top of the upright (2), a lower rotating platform (4) is connected to the top of the lifting sleeve (3), a locking block (8) is slidably installed on one end of the lower rotating platform (4), and a locking groove (7) is opened on the end of the lifting sleeve (3) near the locking block (8). The top of the card block (8) has a limiting groove (16), and the top of the lifting sleeve (3) near the limiting groove (16) is fitted with a limiting pin (17). The end of the card block (8) away from the card groove (7) is connected to a slide rod (9), and a fixing spring (10) is sleeved on the outside of the slide rod (9). An adjusting seat (12) is fitted on the end of the slide rod (9) away from the locking block (8). A two-way screw (13) is connected to the top of one end of the adjusting seat (12). A pulley (19) is fitted on the outer wall of the middle part of the two-way screw (13). A transmission belt (20) is connected to the outer wall of the pulley (19). An adjusting motor (21) is installed on the top of the lower rotating platform (4) near the top of the transmission belt (20).

2. The anti-fall structure for a tower crane erection according to claim 1, characterized in that: The top of the lower slewing platform (4) is fixedly equipped with a lifting arm (5), and a lifting device (6) is provided at one end of the lifting arm (5).

3. The anti-fall structure for a tower crane erection according to claim 1, characterized in that: The lower slewing platform (4) has a sliding groove (14) at one end near the locking block (8). One end of the locking block (8) is slidably connected to the inner wall of the sliding groove (14), and the other end of the locking block (8) is slidably inserted into the locking groove (7). The bottom of the end of the locking block (8) near the lifting frame (3) is an arc surface.

4. The anti-fall structure for a tower crane erection according to claim 1, characterized in that: The lifting frame (3) has a limiting hole (18) at the top near the limiting pin (17). The bottom end of the limiting hole (18) is connected to the slot (7). The bottom end of the limiting pin (17) slides through the limiting hole (18) and is inserted into the limiting slot (16).

5. The anti-fall structure for a tower crane erection according to claim 3, characterized in that: The sliding groove (14) is connected to the adjustment groove (15) at the end away from the locking block (8). The adjustment seat (12) is slidably installed in the adjustment groove (15) and the adjustment seat (12) is threaded onto the outer wall of one end of the double-acting screw (13).

6. The anti-fall structure for a tower crane erection according to claim 1, characterized in that: The adjusting seat (12) has a sliding hole (11) on its surface near the slide rod (9). The slide rod (9) has a T-shaped cross section. One end of the slide rod (9) slides through the sliding hole (11) and is fixedly installed on the locking block (8).

7. The anti-fall structure for a tower crane erection according to claim 1, characterized in that: One end of the fixing spring (10) is fixedly installed on one end of the locking block (8), and the other end of the fixing spring (10) is fixedly connected to the adjusting seat (12).

8. The anti-fall structure for a tower crane erection according to claim 1, characterized in that: Two bidirectional lead screws (13) are symmetrically arranged. Both ends of the two bidirectional lead screws (13) are rotatably installed on the inner wall of the adjacent adjustment groove (15). Pulleys (19) are fixedly sleeved on the outer wall of the middle part of the two bidirectional lead screws (13) and the rotating shaft of the adjustment motor (21). The three pulleys (19) are connected by transmission belts (20).

9. The anti-fall structure for a tower crane erection according to claim 1, characterized in that: The lower slewing platform (4) has a transmission groove (23) at the top near the pulley (19), and a protective box (22) is provided outside the adjusting motor (21). The bottom of the protective box (22) is fixedly installed at the top of the lower slewing platform (4).

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