A tower crane jacking beam pin shaft anti-falling structure

Abstract

The utility model relates to tower crane jacking beam technical field, concretely is a kind of tower crane jacking beam pin shaft anti-falling structure, including jacking beam, jacking beam is equipped with jack, anti-falling frame is equipped with the through hole one alignment with jack in, jack and the through hole one are inserted and equipped with pin shaft, the side of anti-falling frame is equipped with the through hole two, jacking beam is equipped with the through hole three alignment with the through hole two, the through hole two and the through hole three are inserted and equipped with the insertion rod, the insertion rod is equipped with perforation in the side of jacking beam away from anti-falling frame, perforation is inserted and equipped with split pin, when jacking operation is carried out to tower crane, through the joint limiting of pin shaft and insertion rod to jacking beam and anti-falling frame, the stability of jacking beam is guaranteed, and insertion rod can still limit jacking beam when pin shaft accidentally falls off, avoid jacking beam to produce instability, ensure the safety of tower crane and staff.

Description

Technical Field

[0001] This application relates to the field of tower crane lifting beam technology, specifically a structure for preventing the pin shaft of a tower crane lifting beam from falling off. Background Technology

[0002] During the jacking operation of a tower crane, the jacking frame is mounted on the outside of the standard section to achieve climbing. Its key limiting structure consists of the anti-detachment frame, pin shaft and standard section on the jacking beam.

[0003] The commonly used anti-detachment method involves directly inserting pins into corresponding holes in the standard section, lifting beam, and anti-detachment frame, relying on the pins themselves to withstand shear force for mechanical limiting. However, this structure has significant safety hazards: during actual lifting, factors such as hydraulic system start-up and shutdown, wind load, and motion inertia can easily cause vibration and impact on the lifting beam, leading to repeated fretting and wear between the pins and the hole walls. After long-term use, the clearance may increase, and without additional anti-detachment devices, gravity and friction alone are insufficient to reliably constrain pin displacement, posing a risk of the pins gradually loosening or even detaching. If the pins detach under load, it will cause the lifting frame to become unstable, posing a safety risk to workers. Utility Model Content

[0004] In view of the problem that the lifting frame is prone to instability due to the detachment of the pins in the existing technology, this utility model provides a structure to prevent the pins of the tower crane lifting beam from falling off.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows: This utility model provides a structure to prevent the pin of a tower crane lifting beam from falling off, including a lifting frame, on which a lifting beam is fixedly mounted, characterized in that: An anti-detachment frame is installed on the outside of the lifting beam. An insertion hole is provided inside the lifting beam. A through hole 1 is provided on the anti-detachment frame, which is aligned with the insertion hole. A pin is inserted into the insertion hole and through hole 1. A through hole 2 is provided on one side of the anti-detachment frame. A through hole 3 is provided on the lifting beam, which is aligned with through hole 2. An insert rod is inserted into through hole 2 and through hole 3. A through hole is provided on the side of the lifting beam away from the anti-detachment frame, and a cotter pin is inserted into the through hole.

[0006] Preferably, the anti-detachment frame includes a first vertical plate, a second vertical plate, and a rib plate. The first vertical plate is located between the lifting beam and the second vertical plate. The first vertical plate and the second vertical plate are arranged in parallel. The rib plate is located between the first vertical plate and the second vertical plate. The two ends of the rib plate are fixedly connected to the first vertical plate and the second vertical plate, respectively. A first through hole is provided on the first vertical plate. The second vertical plate has a fourth through hole aligned with the first through hole. The second through hole is provided on the first vertical plate and the second vertical plate and is aligned with each other.

[0007] Preferably, the diameter of the through hole four is not less than the diameter of the pin shaft. A baffle and a fixing rod are provided on the side of the vertical plate two away from the lifting beam. The fixing rods are in multiple sets and fixedly arranged at intervals on the vertical plate two. The baffle is slidably sleeved on the fixing rod. The side of the baffle close to the vertical plate two abuts against the pin shaft. An end cap is fixedly provided on the end of the fixing rod away from the vertical plate two. A spring is sleeved on the section of the fixing rod between the baffle and the end cap. The two ends of the spring abut against the baffle and the end cap respectively.

[0008] Preferably, the fixing rod is provided with a threaded section, and an adjusting sleeve is provided on the side of the baffle away from the second vertical plate. The adjusting sleeve is fitted onto the threaded section of the fixing rod, and the spring is located between the adjusting sleeve and the baffle, with the two ends of the spring abutting against the adjusting sleeve and the baffle respectively.

[0009] Preferably, a rubber pad is provided on the side of the baffle near the pin.

[0010] Preferably, the diameter of the through hole four is smaller than the diameter of the pin.

[0011] Preferably, a plurality of fixed rods are fixedly arranged at intervals on the side of the vertical plate near the lifting beam. One end of the fixed rod is slidably inserted into the lifting beam. The fixed rod is provided with a threaded section. An adjusting sleeve is provided on the side of the lifting beam away from the vertical plate. The adjusting sleeve is fitted onto the threaded section of the fixed rod. A spring is fitted on the section of the fixed rod between the adjusting sleeve and the lifting beam. The two ends of the spring abut against the adjusting sleeve and the lifting beam, respectively.

[0012] Preferably, the lifting beam is provided with a chain, and the two ends of the chain are respectively connected to the lifting beam and the pin.

[0013] The advantages of adopting the above technical solution are: This utility model includes a lifting beam with an insertion hole inside. An anti-detachment frame has a through hole aligned with the insertion hole. A pin is inserted into the standard section, the insertion hole, and the through hole. A second through hole is located on one side of the anti-detachment frame. A third through hole is located on the lifting beam aligned with the second through hole. Insert rods are inserted into the second and third through holes. A through hole is located on the side of the lifting beam away from the anti-detachment frame, and a cotter pin is inserted into the through hole. During the tower crane's lifting operation, the pin and the insert rod limit the connection between the lifting beam and the standard section, ensuring the stability of the lifting beam and the safety of the tower crane and its personnel. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1A schematic diagram of the structure of the first embodiment of this utility model is shown; Figure 2 A partial cross-sectional view of the first embodiment of the present invention is shown; Figure 3 A schematic diagram of the anti-detachment frame according to the first embodiment of this utility model is shown; Figure 4 A partial cross-sectional view of the second embodiment of the present invention is shown; Figure 5 A partial cross-sectional view of the third embodiment of the present invention is shown.

[0016] The components include: 1. Lifting beam; 2. Anti-detachment frame; 21. Vertical plate one; 22. Vertical plate two; 23. Rib plate; 201. Through hole one; 202. Through hole two; 203. Through hole four; 3. Pin shaft; 4. Insert rod; 401. Through hole; 5. Baffle plate; 6. Fixing rod; 601. End cap; 7. Spring; 8. Adjusting sleeve. Detailed Implementation

[0017] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] like Figure 1-5 As shown in the figure, this utility model embodiment discloses a structure for preventing the pin shaft of a tower crane lifting beam from falling off, including a lifting frame, a lifting beam 1 fixedly mounted on the lifting frame, an anti-falling bracket 2 mounted on the outer side of the lifting beam 1, an insertion hole in the lifting beam 1, a through hole 201 aligned with the insertion hole on the anti-falling bracket 2, a pin shaft 3 inserted into the insertion hole and the through hole 201, a through hole 202 on one side of the anti-falling bracket 2, a through hole 3 aligned with the through hole 202 on the lifting beam 1, a rod 4 inserted into the through hole 202 and the through hole 3, and a through hole 401 on the side of the lifting beam 1 away from the anti-falling bracket 2, a cotter pin inserted into the through hole 401.

[0019] In this embodiment, the anti-detachment frame 2 includes a first vertical plate 21, a second vertical plate 22, and a rib 23. The first vertical plate 21 is located between the lifting beam 1 and the second vertical plate 22, and the first vertical plate 21 and the second vertical plate 22 are arranged in parallel. The rib 23 is located between the first vertical plate 21 and the second vertical plate 22, and both ends of the rib 23 are fixedly connected to the first vertical plate 21 and the second vertical plate 22, respectively. A first through hole 201 is provided on the first vertical plate 21, and the second vertical plate 22 is provided with a through hole 201 aligned with the first through hole 201. Through hole 4 203 and through hole 202 are set on vertical plate 1 21 and vertical plate 22 and aligned with each other. The two ends of rib plate 23 are welded to vertical plate 1 21 and vertical plate 22 respectively. Vertical plate 1 21, vertical plate 22 and rib plate 23 together form anti-detachment frame 2 to ensure the strength of anti-detachment frame 2. Insert rod 4 is inserted into through hole 202 on vertical plate 1 21 and vertical plate 22 to limit the insertion rod 4 at multiple points and ensure the stability of insertion rod 4 and anti-detachment frame 2.

[0020] During the tower crane's jacking process, when the jacking frame climbs along the standard section to the stop position, the jacking beam 1 on the jacking frame is raised to the corresponding position on the standard section. Then, the pin 3 is inserted along the insertion hole of the jacking beam 1 into the through hole 201 of the standard section and the anti-detachment frame 2. The pin 3 connects and limits the jacking beam 1 and the standard section. Afterwards, the operator inserts the rod 4 along the through hole 202 of the anti-detachment frame 2 and the through hole 3 of the jacking beam 1. After the rod 4 is inserted, the cotter pin is inserted into the through hole 401 of the rod 4, and the open end of the cotter pin is bent to limit the rod 4. The rod 4 further limits the anti-detachment frame 2 and the pin 3, preventing the jacking beam 1 and the pin 3 from separating. This improves the connection stability between the jacking beam 1 and the standard section and prevents the pin 3 from easily falling off when the jacking beam 1 vibrates, thus avoiding instability of the jacking beam 1 and ensuring the safety of the tower crane and the operators.

[0021] As shown in the attached diagram of the instruction manual. Figure 4 As shown, the second embodiment of this utility model differs from the first embodiment in that it also includes a baffle 5, a fixing rod 6, and a spring 7.

[0022] Specifically, in this embodiment, the diameter of the through hole 203 is not less than the diameter of the pin 3. A baffle 5 and a fixing rod 6 are provided on the side of the vertical plate 22 away from the lifting beam 1. Multiple sets of fixing rods 6 are fixedly installed on the vertical plate 22 at intervals. The baffle 5 is slidably sleeved on the fixing rod 6. The side of the baffle 5 closest to the vertical plate 22 abuts against the pin 3. An end cap 601 is fixedly installed on the end of the fixing rod 6 away from the vertical plate 22. A spring 7 is sleeved on the section of the fixing rod 6 between the baffle 5 and the end cap 601. The two ends of the spring 7 abut against the baffle 5 and the end cover 601 respectively. When the lifting beam 1 vibrates, causing the pin 3 to move towards the baffle 5 along the through hole 1 201 and the through hole 4 203, the baffle 5 abuts against the pin 3 to limit the displacement of the pin 3. When the pin 3 pushes the baffle 5, the baffle 5 compresses the spring 7 on the fixed rod 6. The compressed spring 7 applies a reverse thrust to the baffle 5, thereby preventing excessive displacement of the pin 3, ensuring the stability of the pin 3, and preventing the pin 3 from falling off.

[0023] In this embodiment, the fixed rod 6 is provided with a threaded section, and the baffle 5 is provided with an adjusting sleeve 8 on the side away from the vertical plate 22. The adjusting sleeve 8 is fitted onto the threaded section of the fixed rod 6. The spring 7 is located between the adjusting sleeve 8 and the baffle 5. The two ends of the spring 7 abut against the adjusting sleeve 8 and the baffle 5 respectively. The operator can rotate the adjusting sleeve 8 along the fixed rod 6 to adjust the thrust of the spring 7 on the baffle 5 in the initial state, so as to ensure that the baffle 5 effectively abuts and limits the pin 3.

[0024] In this embodiment, a rubber pad is provided on the side of the baffle 5 near the pin 3. The rubber pad on the baffle 5 prevents the pin 3 from directly colliding and rubbing against the baffle 5 when it comes into contact with the baffle 5, thus ensuring the safety of the baffle 5 and the pin 3.

[0025] In this embodiment, a chain is provided on the lifting beam 1, with both ends of the chain connected to the lifting beam 1 and the pin 3 respectively. One end of the pin 3 is connected to the lifting beam 1 through the chain to prevent the pin 3 from falling when it comes out of the insertion hole of the lifting beam 1, thus ensuring the safety of personnel on the ground.

[0026] As shown in the attached diagram of the instruction manual. Figure 5 As shown, the third embodiment of this utility model differs from the second embodiment in that the diameter of the through hole 203 is different, the end cap 601 and the baffle 5 are omitted, and the installation positions of the fixing rod 6, spring 7, and adjusting sleeve 8 are different, etc. Specifically, in this embodiment, the diameter of the fourth through hole 203 is smaller than the diameter of the pin 3. The baffle at the fourth through hole can abut and block the pin, preventing the pin from passing through the fourth through hole.

[0027] In this embodiment, multiple sets of fixing rods 6 are fixedly installed at intervals on the side of the vertical plate 21 near the lifting beam 1. One end of the fixing rod 6 is slidably inserted into the lifting beam 1. The fixing rod 6 has a threaded section. An adjusting sleeve 8 is provided on the side of the lifting beam 1 away from the vertical plate 21. The adjusting sleeve 8 is fitted onto the threaded section of the fixing rod 6. A spring 7 is fitted on the section of the fixing rod 6 between the adjusting sleeve 8 and the lifting beam 1. The two ends of the spring 7 abut against the adjusting sleeve 8 and the lifting beam 1, respectively. When the pin 3 moves closer to the vertical plate 22 along the through hole 201, the diameter of the through hole 203 is smaller than the diameter of the pin 3, so that the vertical plate 22 abuts against the pin 3. When the pin 3 pushes the vertical plate 22, the vertical plate 22 drives the fixing rod 6 and the adjusting sleeve 8 to compress the spring 7. The compressed spring 7 applies a reverse pulling force to the vertical plate 22, thereby limiting the displacement of the pin 3 and preventing the pin 3 from falling off.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A structure for preventing the pin of a tower crane lifting beam from falling off, comprising a lifting frame, on which a lifting beam is fixedly mounted, characterized in that: An anti-detachment frame is installed on the outside of the lifting beam. An insertion hole is provided inside the lifting beam. A through hole 1 is provided on the anti-detachment frame, which is aligned with the insertion hole. A pin is inserted into the insertion hole and through hole 1. A through hole 2 is provided on one side of the anti-detachment frame. A through hole 3 is provided on the lifting beam, which is aligned with through hole 2. An insert rod is inserted into through hole 2 and through hole 3. A through hole is provided on the side of the lifting beam away from the anti-detachment frame, and a cotter pin is inserted into the through hole.

2. The anti-fall-off structure for the tower crane lifting beam pin according to claim 1, characterized in that: The anti-detachment frame includes a first vertical plate, a second vertical plate, and a rib plate. The first vertical plate is located between the lifting beam and the second vertical plate. The first vertical plate and the second vertical plate are arranged in parallel. The rib plate is located between the first vertical plate and the second vertical plate. The two ends of the rib plate are fixedly connected to the first vertical plate and the second vertical plate, respectively. A first through hole is provided on the first vertical plate. A fourth through hole is provided on the second vertical plate, which is aligned with the first through hole. The second through hole is provided on the first vertical plate and the second vertical plate and is aligned with each other.

3. The anti-fall-off structure for the tower crane lifting beam pin according to claim 2, characterized in that: The diameter of the through hole four is not less than the diameter of the pin shaft. A baffle and a fixing rod are provided on the side of the vertical plate two away from the lifting beam. The fixing rods are in multiple sets and are fixedly installed on the vertical plate two at intervals. The baffle is slidably sleeved on the fixing rod. The side of the baffle close to the vertical plate two abuts against the pin shaft. An end cap is fixedly installed on the end of the fixing rod away from the vertical plate two. A spring is sleeved on the section of the fixing rod between the baffle and the end cap. The two ends of the spring abut against the baffle and the end cap respectively.

4. The anti-detachment structure for the tower crane lifting beam pin according to claim 3, characterized in that: The fixed rod is provided with a threaded section, and an adjusting sleeve is provided on the side of the baffle away from the second vertical plate. The adjusting sleeve is fitted onto the threaded section of the fixed rod, and the spring is located between the adjusting sleeve and the baffle. The two ends of the spring abut against the adjusting sleeve and the baffle, respectively.

5. The anti-fall-off structure for the tower crane lifting beam pin according to claim 3, characterized in that: A rubber pad is provided on the side of the baffle near the pin.

6. The anti-fall-off structure for the tower crane lifting beam pin according to claim 2, characterized in that: The diameter of the fourth through hole is smaller than the diameter of the pin.

7. The anti-fall-off structure for the tower crane lifting beam pin according to claim 6, characterized in that: Multiple sets of fixing rods are fixedly installed at intervals on the side of the vertical plate near the lifting beam. One end of the fixing rod is slidably inserted into the lifting beam. The fixing rod has a threaded section. An adjusting sleeve is provided on the side of the lifting beam away from the vertical plate. The adjusting sleeve is fitted onto the threaded section of the fixing rod. A spring is fitted on the section of the fixing rod between the adjusting sleeve and the lifting beam. The two ends of the spring abut against the adjusting sleeve and the lifting beam, respectively.

8. The anti-fall-off structure for the tower crane lifting beam pin according to claim 1, characterized in that: A chain is installed on the lifting beam, and the two ends of the chain are connected to the lifting beam and the pin, respectively.

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